Light source device and airplane warning light

Abstract

To provide a light source device and an airplane warning light, each of which has simple constitution and is easily maintained.SOLUTION: A light source device comprises: a light emitting portion having a light source; a main body portion having the light emitting portion provided therein; a cylindrical holding portion provided in such a way as to project from the main body portion; and a rod-like light guiding member provided in such a way as to penetrate through the inside of the holding portion. The holding portion is inserted into a hole formed in a tower, and the main body portion is fixed to the tower such a way that a tip end portion including an end on the side of the holding portion not in contact with the main body portion is arranged outside the tower. At the tip end portion, a first recess is formed. A first end which is one end of the light guiding member, is provided adjacent to the light source. A second end which is opposite to the first end of the light guiding member, is an inclined surface which is inclined with respect to the surface substantially orthogonal to a center line of the holding portion, the inclined surface is visible via the first recess when viewed from a direction orthogonal to the center line. The second end is provided between a first surface including a tip end face which is a part of the tip end portion in which the first recess is not formed, and a second surface including a bottom face of the first recess.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 a mounting lifting device for mounting an aviation obstruction light on a tower having a cylindrical structure surrounded by walls, and a method for mounting 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 mounting member of the aviation obstruction light can be inserted is provided in the tower, and a pipe with a pulley attached to the tip thereof is stretched outside the tower through the hole, and a pipe stretching and retracting mechanism that can fix the pipe in a state where it can be stretched freely and at least in a stretched state is provided. 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 mounting 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 an aviation obstruction light attached to a tower or 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, a light source device according to the present invention includes, for example, a light emitting portion including a light source, a main body portion in which the light emitting portion is provided inside, a cylindrical holding portion provided so as to protrude from the main body portion, and a rod-shaped light guide member provided so as to penetrate inside the holding portion. The holding portion is inserted into a hole provided in a tower, and the main body portion is fixed to the tower such that a tip portion including an end on a side not in contact with the main body portion of the holding portion is disposed outside the tower. A first concave portion is formed in the tip portion. A first end, which is one end of the light guide member, is provided adjacent to the light source. A second end, which is an end opposite to the first end of the light guide member, is an inclined surface inclined with respect to a plane substantially orthogonal to the center line of the holding portion, and has an inclined surface visible through the first concave portion when viewed from a direction orthogonal to the center line. The second end is disposed between a first surface, which is a surface including a tip surface that is a portion of the tip portion where the first concave portion is not formed, and a second surface, which is a surface including a bottom surface of the first concave portion.

[0007] In order to solve the above problems, the aviation obstacle lamp according to the present invention includes, for example, a light emitting part including a light source, a main body part in which the light emitting part is provided inside, a cylindrical holding part provided so as to protrude from the main body part, and a rod-shaped light guide member provided so as to penetrate the inside of the holding part. The holding part is inserted into a hole provided in a tower, and the main body part is provided on the tower such that a tip part including an end on a side not in contact with the main body part of the holding part protrudes from an outer wall surface of the tower. A first concave part is formed in the tip part. A first end, which is one end of the light guide member, is provided adjacent to the light source. A second end, which is an end opposite to the first end of the light guide member, is an inclined surface inclined with respect to a plane substantially orthogonal to a center line of the holding part, and has an inclined surface visible through the first concave part when viewed from a direction orthogonal to the center line. The second end is disposed between a first surface, which is a surface including a tip surface that is a portion of the tip part where the first concave part is not formed, and a second surface, which is a surface including a bottom surface of the first concave part. The main body part is provided on the tower such that the first concave part is located on an upper side in the vertical direction and the inclined surface faces obliquely upward.

[0008] According to the light source device or the aviation obstacle lamp according to the present invention, the holding part protrudes from the main body part, and it is only necessary to insert the holding part into a hole provided in the wall of the windmill and attach the main body part to the inner surface of the wall, so that a light source device or an aviation obstacle lamp with a simplified structure can be obtained. Further, since the light source part is provided inside the main body part, maintenance is easy.

[0009] Moreover, according to the light source device or the aviation obstruction light according to the present invention, the second end, which is the end opposite to the first end provided adjacent to the light source of the light guide member, has an inclined surface inclined with respect to the plane substantially orthogonal to the center line of the holding portion. The inclined surface is visible through the first recess when viewed from the direction orthogonal to the center line. Since the second end is disposed between the first surface (the surface including the tip surface which is the portion where the first recess is not formed at the tip) and the second surface (the surface including the bottom surface of the first recess), it is possible to irradiate light over a wide range while preventing damage to the light guide member. Further, according to the aviation obstruction light according to the present invention, by providing the main body portion on the tower such that the first recess is located on the upper side in the vertical direction and the inclined surface faces obliquely upward, light can be irradiated upward.

[0010] The light guide member may be rectangular when viewed along the center line, and the inclined surface may be formed by obliquely cutting the side or corner closest to the first recess. According to this configuration, the light guide member and the inclined surface are easy to process.

[0011] A second recess may be formed on the opposite side of the first recess so as to sandwich the light guide member at the tip portion. Thereby, water droplets due to rain or the like can be dropped downward.

[0012] The inclination angle of the inclined surface with respect to the plane orthogonal to the center line may be 10° to 20°. Thereby, the aviation obstruction light can satisfy the standard of a low-intensity aviation obstruction light (irradiating light with a luminous intensity of 32 cd (candela) or more in the direction of 6 to 10° obliquely upward).

Advantages of the Invention

[0013] According to the present invention, it is possible to provide a light source device and an aviation obstruction light having a simple configuration and easy maintenance.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0015] 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 generally tall-standing building, for example, a tower provided in a windmill, a bridge, etc., a radio tower, 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 section. 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 section of the tower, for example, at the top of the tower.

[0016] FIG. 1 is a perspective view showing an outline of a windmill 100 provided with the aviation obstruction light 1 according to the first embodiment of the present invention. The windmill 100 mainly has 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.

[0017] In the tower 101, an aviation obstruction light 1 is provided in the middle section (for example, the intermediate position in the height direction). The 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.

[0018] FIG. 2 is a perspective view showing an outline of the aviation obstruction light 1. FIG. 3 is a cross-sectional view showing an outline of 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 surface is the inside of the tower 101, and the upper side of the paper surface is the outside of the tower 101. Further, FIG. 3 partially omits the hatching indicating the cross section.

[0019] The aviation obstruction light 1 mainly includes a main body portion 10, a holding portion 20, a light emitting portion 30, and a light guiding member 40.

[0020] The main body portion 10 is a box-shaped member with a hollow interior 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.

[0021] The main body portion 10 has a mounting portion 11 for mounting on the tower 101. The mounting portion 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 mounting portion 11, and by driving the anchor bolt into the wall 101a, the main body portion 10 (that is, the aviation obstruction light 1) is fixed to the wall 101a (that is, the tower 101). Further, a hole 101c is provided in the wall 101a, and the holding portion 20 is inserted into the hole 101c. Note that when the holding portion 20 is inserted into the hole 101c and the main body portion 10 is fixed to the wall 101a, a portion including the end on the side of the holding portion 20 that does not contact the main body portion 10 (hereinafter referred to as the tip portion 20a) protrudes from the wall 101a and is disposed outside the wall 101a.

[0022] Inside the main body 10, a light emitting unit 30 is provided. The light emitting unit 30 mainly includes 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.

[0023] Also, a holding unit 20 is provided in the main body 10. The holding unit 20 is a cylindrical member, and the base side is provided in the main body 10. For example, a recess 12 is formed in the main body 10, and the base of the holding unit 20 is provided inside the recess 12. The holding unit 20 mainly includes a wall 21, a cylindrical member 22, and a seal member 23.

[0024] The wall 21 has a cylindrical hollow portion 21a, and the cylindrical member 22 is provided in the hollow portion 21a. A through hole 22a is formed in the cylindrical member 22 along the center line c. A seal member 23 is provided between the wall 21 and the cylindrical member 22.

[0025] Also, the wall 21 has flat surfaces 21b and 21c along a plane perpendicular to the center line c of the holding unit 20, and through holes 21d and 21e are formed in the flat surfaces 21b and 21c, respectively. The cylindrical member 22 is sandwiched by the flat surfaces 21b and 21c.

[0026] FIG. 4 is a perspective view showing an outline of the tip portion 20a. FIG. 5 is a cross-sectional view showing an outline of the tip portion 20a. In the tip portion 20a, a recess 21f (corresponding to the first recess of the present invention) and a recess 21g (corresponding to the second recess of the present invention) are formed in the wall 21. The recess 21g is formed on the opposite side of the recess 21f so as to sandwich the light guide member 40. The surface in the portion where the recess 21f is not formed near the tip of the tip portion 20a (the wall 21) is the tip surface 21h, and the bottom surface of the recess 21f is the surface 21i.

[0027] In this embodiment, the wall 21 and the cylindrical member 22 are composed of two parts of the same shape. Two flat sealing members (for example, packings) having recesses are used as the cylindrical member 22. The sealing member and the sealing member 23, which are part of the cylindrical member 22, are inserted into the wall 21, and the two assembled members are fixed facing each other to assemble the wall 21, the cylindrical member 22, and the sealing member 23. Then, the through-hole 22a is formed by opposing the recesses of the two sealing members. However, the forms of the wall 21 and the cylindrical member 22 are not limited to this. For example, the wall 21 and the cylindrical member 22 may be one part. Also, although the shapes of the recess 21f and the recess 21g are the same, the shape of the recess 21g is not limited to this. Also, the recess 21g is not essential.

[0028] Returning to the description of FIG. 3. The light guide member 40 is rod-shaped and is provided so as to penetrate the inside of the holding portion 20. The light guide member 40 is inserted into the through-holes 21d, 21e, and the through-hole 22a. Further, the light guide member 40 is fixed to the wall 21 by an adhesive 24 filled in a recess 21j formed at the tip portion 20a. In this embodiment, the light guide member 40 has a rectangular shape when viewed along the center line c, and is used by cutting a plate glass into a rod shape.

[0029] Both ends of the light guide member 40 protrude from the planes 21b and 21c. One end 40a (corresponding to the first end of the present invention) of the light guide member 40 is provided adjacent to the light source 31. Therefore, most of the light emitted from the light source 31 enters the light guide member 40 from the end 40a, and the use efficiency of the light beam is high. The end 40a is a plane and is substantially orthogonal to the center line c. However, the end 40a is not limited to a plane.

[0030] The end 40b (corresponding to the second end of the present invention) on the side opposite to the end 40a of the light guide member 40 is disposed outside the adhesive 24. Therefore, when the aviation obstruction light 1 is provided on the tower 101, the end 40b is exposed.

[0031] The end 40b is an inclined surface that is inclined with respect to a plane substantially orthogonal to the center line c. The end 40b is a flat surface, and the inclination angle θ of the end 40b with respect to the plane substantially orthogonal to the center line c is 10° to 20°. In the present embodiment, the inclination angle θ is 20°.

[0032] As shown in FIGS. 4 and 5, the end 40b is disposed between a surface S1 (corresponding to the first surface of the present invention) including the front end surface 21h and a surface S2 (corresponding to the second surface of the present invention) including the surface 21i. Here, the space between the surface S1 and the surface S2 is a concept including the positions of the surface S1 and the surface S2.

[0033] In the present embodiment, the side 40c farthest from the end 40a of the end 40b is located on the side of the surface S2 rather than the surface S1. However, the side 40c only needs not to protrude more than the surface S1 and may be located on the surface S1.

[0034] The side 40d closest to the end 40a of the end 40b is located on the side of the surface S1 rather than the surface S2. Therefore, the end 40b is visible through the recess 21f when viewed from the direction orthogonal to the center line c. However, the side 40d may be located on the surface S2.

[0035] The light guide member 40 has a rectangular shape when viewed along the center line c, and the end 40b is formed by obliquely cutting the side closest to the recess 21f.

[0036] The dotted arrow in FIG. 5 schematically shows the direction of light irradiated from the light guide member 40 to the outside of the aviation obstruction light 1. The aviation obstruction light 1 is provided on the windmill 100 such that the center line c substantially extends along the horizontal direction, and the direction substantially orthogonal to the center line c (the vertical direction in the plane of FIG. 5) is the vertical direction. Further, the recess 21f is located on the upper side in the vertical direction.

[0037] 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 while spreading from the light source 31 enters the light guide member 40 and is irradiated from the end 40b while being repeatedly reflected inside the light guide member 40.

[0038] Since the edge 40b is formed by obliquely cutting the side closest to the recess 21f, the edge 40b is generally facing the recess 21f. Also, since the recess 21f is formed in the holding portion 20, the light emitted from the edge 40b will not be blocked by the wall 21. Therefore, light can be irradiated over a wide range.

[0039] 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 6 to 10° obliquely upward. By inclining the edge 30b, forming the recess 21f, positioning the recess 21f above the vertical direction, and providing the main body portion 10 on the tower 101 such that the edge 30b faces obliquely upward, this standard can be satisfied.

[0040] According to the present embodiment, since the holding portion 20 protrudes from the main body portion 10, the aviation obstruction light 1 can be installed simply by inserting the holding portion 20 into the hole 101c provided in the wall 101a of the windmill 100 and attaching the attachment portion 11 to the inner surface 101b of the wall 101a with an anchor bolt or the like. Also, the aviation obstruction light 1 can be made easy to attach and replace.

[0041] Moreover, according to the present embodiment, by providing the recess 21f and arranging the edge 40b between the surface S1 and the surface S2, while preventing damage to the light guide member 40, light can be irradiated over a wide range. If the edge 40b is not inclined with respect to the plane orthogonal to the center line c, the light will be irradiated in a direction substantially along the center line c. On the other hand, by inclining the edge 40b with respect to the plane orthogonal to the center line c, the irradiation direction of the light can be greatly inclined with respect to the center line c, thereby enabling light to be irradiated over a wide range.

[0042] Further, according to the present embodiment, since the light emitting unit 30 is provided inside the main body unit 10, the light emitting unit 30 can be easily replaced from inside 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 1, the light source 31, that is, the light emitting unit 30 can be easily replaced, and maintenance is easy. Further, since the holding unit 20 and the light guide member 40 do not need to be replaced or the like, the maintainability is high.

[0043] Further, in the present embodiment, since the shape of the light guide member 40 when viewed along the center line c is a rectangular shape, it is only necessary to cut the plate glass, and the processing of the light guide member 40 is easy. Further, since the end 40b only requires cutting the end of the plate glass obliquely, the processing of the end 40b is easy.

[0044] Further, according to the present embodiment, since the inclination angle θ of the end 30b is 10° to 20°, when the main body unit 10 is provided on the tower 101 such that the concave portion 21f is located on the upper side in the vertical direction and the end 30b faces obliquely upward, a large amount of light can be irradiated in the obliquely upward 6 to 10° direction. Therefore, the aviation obstruction light 1 can satisfy the standard of a low-intensity aviation obstruction light (irradiating light with a luminous intensity of 32 cd (candela) or more in the obliquely upward 6 to 10° direction).

[0045] Further, according to the present embodiment, since the concave portion 21g is provided, water droplets due to rain or the like can be dropped downward.

[0046] 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.

[0047] In addition, in the present embodiment, the aviation obstruction light 1 is provided on the tower 101 by fixing the main body 10 to the tower 101 such that the concave portion 21f is located on the upper side in the vertical direction and the end 40b (inclined surface) faces obliquely upward. However, when the aviation obstruction light 1 is not an aviation obstruction light such as a low-intensity aviation obstruction light, it is not essential to make the concave portion 21f be on the upper side in the vertical direction and the end 40b face obliquely upward. For example, in the case of a light source device having the same configuration as the aviation obstruction light 1, the position of the concave portion 21f and the orientation of the end 40b are arbitrary.

[0048] In addition, 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.

[0049] In addition, in the present embodiment, a plate glass cut into a rod shape is used as the light guide member 40, but the form of the light guide member 40 is not limited to this. First, the material of the light guide member 40 is not limited to glass. For example, transparent resins such as methacrylic (PMMA) and polycarbonate (PC) may be used. In short, it is only necessary that light is transmitted through the light guide member 40, and the light guide member 40 can be formed using various materials having light transmittance (including transparent and translucent).

[0050] Also, the shape of the light guide member 40 is not limited to this. For example, although the end 40b of the light guide member 40 is an inclined surface, the form of the end of the light guide member 40 is not limited to the end 40b. FIGS. 6(A) to (D) are perspective views showing the outlines of the aviation obstruction lights 1A, 1B, 1C, and 1D having the light guide members 40A, 40B, 40C, and 40D according to modified examples. FIGS. 6(A) to (D) show only the vicinity of the tip portion 20a. Also, in FIG. 6, hatching indicating the cross section is omitted. The aviation obstruction lights 1A, 1B, 1C, and 1D are the same as the aviation obstruction light 1 except that they have the light guide members 40A, 40B, 40C, and 40D instead of the light guide member 40, and descriptions other than the light guide members 40A, 40B, 40C, and 40D are omitted.

[0051] As shown in Fig. 6(A), the end 40e on the tip side of the light guide member 40A has a surface 40f that is substantially orthogonal to the center line c and an inclined surface 40g that is inclined with respect to the surface substantially orthogonal to the center line c. The inclined surface 40g is a flat surface and is disposed between the surface S1 and the surface S2. The inclined surface 40g is formed by obliquely cutting (chamfering the C surface) the side closest to the recess 21f. The end 40e is visible through the recess 21f when viewed from a direction orthogonal to the center line c.

[0052] As shown in Fig. 6(B), the end 40h on the tip side of the light guide member 40B has a surface 40f that is substantially orthogonal to the center line c and an inclined surface 40i that is inclined with respect to the surface substantially orthogonal to the center line c. The end 40h is disposed between the surface S1 and the surface S2. The inclined surface 40i is a curved surface that protrudes toward the surface S1 and is formed by cutting (rounding the R surface) the side closest to the recess 21f. The end 40h is visible through the recess 21f when viewed from a direction orthogonal to the center line c.

[0053] As shown in Fig. 6(C), the end 40j on the tip side of the light guide member 40C has a surface 40f that is substantially orthogonal to the center line c and an inclined surface 40k that is inclined with respect to the surface substantially orthogonal to the center line c. The end 40j is disposed between the surface S1 and the surface S2. The inclined surface 40k is a curved surface that protrudes toward the surface S2 and is formed by cutting the side closest to the recess 21f. The end 40j is visible through the recess 21f when viewed from a direction orthogonal to the center line c.

[0054] As shown in Fig. 6(D), the end 40l on the tip side of the light guide member 40D is an inclined surface that is inclined with respect to the surface substantially orthogonal to the center line c. The end 40l is disposed between the surface S1 and the surface S2. The end 40l is a curved surface that protrudes toward the surface 21i and is formed by cutting the side closest to the recess 21f. The end 40l is visible through the recess 21f when viewed from a direction orthogonal to the center line c.

[0055] In addition, in the present embodiment, the shape of the light guide member 40 when viewed along the center line c was a rectangular shape, but the light guide member 40 may be rod-shaped. For example, as shown in FIG. 7, the light guide member 40E may be square rod-shaped, and the light guide member 40E may be square when viewed along the center line c. The end 40o on the tip side of the light guide member 40E has a surface 40m that is a plane substantially orthogonal to the center line c and an inclined surface 40n that is inclined with respect to the plane substantially orthogonal to the center line c. The inclined surface 40n is formed by obliquely cutting the corner closest to the recess 21f. The inclined surface 40n is visible through the recess 21f when viewed from a direction substantially orthogonal to the center line c.

[0056] For example, as shown in FIG. 8, the light guide member 40F may be round rod-shaped. The end 40p on the tip side of the light guide member 40F has a surface 40q that is a plane substantially orthogonal to the center line c and an inclined surface 40r that is inclined with respect to the plane substantially orthogonal to the center line c. The inclined surface 40r is a flat surface and is disposed between the surface S1 and the surface S2. The inclined surface 40r is formed by obliquely cutting (chamfering the C surface) the side closest to the recess 21f. The end 40p is visible through the recess 21f when viewed from a direction substantially orthogonal to the center line c. Note that the inclined surface 40r is not limited to a flat surface and may be a curved surface.

[0057] Note that the form of the end 40 of the round rod-shaped light guide member is not limited to this. For example, the end of the round rod-shaped light guide member may be a conical shape, a frustum of a cone shape, a shape obtained by cutting a cone or a frustum of a cone in half, or the like. Even with these shapes, the end of the light guide member can have an inclined surface that is inclined with respect to the plane substantially orthogonal to the center line c.

[0058] Also, in this embodiment, the inclination angle θ with respect to the plane substantially orthogonal to the center line c of the end 40b of the light guide member 40 was 20°, but the inclination angle θ with respect to the plane substantially orthogonal to the center line c of the end 40b may be 10° to 20°, and preferably, the inclination angle θ is substantially 15°. FIG. 9 is a diagram schematically showing the direction of light irradiated from the light guide member 40G to the outside of the aviation obstruction light 1G when the inclination angle θ1 of the end 40s, which is an inclined surface, is substantially 15°. Thus, by setting the inclination angle θ of the end 40s to be substantially 15°, light can be irradiated directly upward. Therefore, it is optimal when the aviation obstruction light 1G is a low-intensity aviation obstruction light provided at a position other than the top of the tower, for example, in the middle section.

[0059] 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. Further, in the present invention, "substantially" is a concept including not only the case of being exactly the same but also errors and deformations to the extent that the identity is not lost. Further, 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

[0060] 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G: Aviation obstruction light 10: Main body part 11: Mounting part 11a: Hole 12: Recess 20: Holding part 20a: Tip part 21: Wall 21a: Hollow part 21b, 21c: Plane 21d, 21e: Through hole 21f, 21g: Recess 21h: Tip surface 21i: Surface 21j: Recess 22: Cylindrical member 22a: Through-hole 23: Sealing member 24: Adhesive 30: Light-emitting part 30b: End 31: Light source 32: Substrate 32cd: Luminosity 40, 40A, 40B, 40C, 40D, 40E, 40F, 40G: Light guide member 40a, 40b, 40e, 40h, 40j, 40l, 40o, 40p, 40s: End 40c, 40d: Side 40f, 40m, 40q: Surface 40g, 40i, 40k, 40n, 40r: Inclined surface 100: Windmill 101: Tower 101a: Wall 101b: Surface 101c: Hole 102: Nacelle 103: Blade

Claims

1. A light-emitting part including a light source, A main body part in which the light-emitting part is provided inside, A cylindrical holding part provided so as to protrude from the main body part, A rod-shaped light guide member provided so as to penetrate inside the holding part, Comprising, A light source device in which the holding part is inserted into a hole provided in a tower, and the main body part is fixed to the tower such that a tip part including an end on a side not in contact with the main body part of the holding part is disposed outside the tower, A first recess is formed in the tip part, A first end, which is one end of the light guide member, is provided adjacent to the light source, A second end, which is an end opposite to the first end of the light guide member, is an inclined surface inclined with respect to a plane substantially orthogonal to the center line of the holding part, and has an inclined surface visible through the first recess when viewed from a direction orthogonal to the center line, The second end is disposed between a first surface, which is a surface including a tip surface that is a portion of the tip part where the first recess is not formed, and a second surface, which is a surface including a bottom surface of the first recess A light source device characterized by the above.

2. The light guide member has a rectangular shape when viewed along the center line, The inclined surface is formed by obliquely cutting the side or corner closest to the first recess. The light source device according to claim 1, characterized by the above.

3. A second recess is formed in the tip part on the side opposite to the first recess so as to sandwich the light guide member. The light source device according to claim 1 or 2, characterized by the above.

4. A light-emitting part including a light source, A main body part in which the light-emitting part is provided inside, A cylindrical holding part provided so as to protrude from the main body part, A rod-shaped light guide member provided so as to penetrate inside the holding part, Comprising, A light source device in which the holding part is inserted into a hole provided in a tower, and the main body part is provided on the tower such that a tip part including an end on a side not in contact with the main body part of the holding part protrudes from an outer wall surface of the tower, A first recess is formed in the tip part, A first end, which is one end of the light guide member, is provided adjacent to the light source, A second end, which is an end opposite to the first end of the light guide member, is an inclined surface inclined with respect to a plane substantially orthogonal to the center line of the holding part, and has an inclined surface visible through the first recess when viewed from a direction orthogonal to the center line, The second end is disposed between a first surface that is a surface including a tip surface which is a portion of the tip part where the first recess is not formed, and a second surface that is a surface including the bottom surface of the first recess. The main body is provided on the tower such that the first recess is located on the upper side in the vertical direction and the inclined surface faces obliquely upward. An aviation obstacle lamp characterized by the above. **Claim 5** The light guide member has a rectangular shape when viewed along the center line. The inclined surface is formed by obliquely cutting the side or corner closest to the first recess. An aviation obstacle lamp according to claim 4, characterized by the above. **Claim 6** The inclination angle of the inclined surface with respect to a plane orthogonal to the center line of the inclined surface is 10° to 20°. An aviation obstacle lamp according to claim 5, characterized by the above. **Claim 7** A second recess is formed on the opposite side of the first recess at the tip part so as to sandwich the light guide member. An aviation obstacle lamp according to any one of claims 4 to 6, characterized by the above.

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