Indicator Lights

Abstract

In order to make indicator lights installed in disaster prevention equipment thinner, the goal is to ensure good visibility from the side while remaining unaffected by the power supply at the installation location. [Solution] The device comprises a main body 10 that holds light-emitting elements 150a to 150e via a socket 15, and a front part 20 that is attached to the main body 10 and covers the light-emitting elements 150a to 150e. The front part 20 consists of a light-transmitting part 22 that protrudes from the surface 96 side of the front plate 91 and emits light emitted from the light-emitting elements 150a to 150e, and a cylindrical boss part 21 that protrudes from the light-transmitting part 22 through a through hole 95 formed in the front plate 91 and onto the back surface 97 side of the front plate 91. The main body 10 comprises a boss part through hole 122 through which the boss part 21 passes, and a socket support part 11 that supports the socket 15. The light-emitting elements 150a to 150e and the socket support part 11 are arranged inside the storage box.

Description

Technical Field

[0001] The present invention relates to an indicator lamp for position display installed in a storage box in which disaster prevention equipment such as fire hydrants and packaged fire protection equipment is stored.

Background Art

[0002] Conventional indicator lamps provided on various disaster prevention equipment were provided so as to protrude forward in a dome shape, but there were problems such as obstructing passage, so a thin-type indicator lamp has been proposed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a thin-type indicator lamp, it is an issue to ensure visibility from the side while making it thin. Depending on the installation environment of the disaster prevention equipment, the power supply voltage is different. However, when using a substrate on which LEDs are mounted, if the power supply voltage changes, a substrate corresponding to that voltage must be prepared.

[0005] The present invention has been conceived in view of such circumstances, and in achieving the thinning of the indicator lamp, it is an issue to improve the visibility from the side and to make it unaffected by the power supply at the installation location.

Means for Solving the Problems

[0006] To solve the above problems, this indicator light is installed on the front panel of a storage box in which disaster prevention equipment is housed, and comprises a main body that holds a light-emitting element via a socket, and a front part that is attached to the main body and covers the light-emitting element, the front part being composed of a translucent part that protrudes from the surface side of the front panel and emits light emitted from the light-emitting element, and a cylindrical boss part that protrudes from the translucent part through a through hole formed in the front panel and onto the back side of the front panel, the main body comprising a boss through hole through which the boss part passes, a socket to which the light-emitting element is attached, and a socket support part that supports the socket, the light-emitting element, the socket and the socket support part being arranged inside the storage box. The indicator light may have a recess formed on the inner circumference side of the boss portion on the back surface of the light-transmitting portion, which is recessed in a direction away from the light-emitting body. The recess may be formed in a curved shape at the center of the back surface. An annular projection that rises in an annular shape toward the light-emitting body may be formed on the outer circumference of the recess, and an annular recess that is recessed toward the direction away from the light-emitting body may be formed on the outer circumference of the annular projection. The recess is preferably an annular groove with a triangular cross-section. The recess may include an internal groove with a triangular cross-section, formed at the center of the back surface and on the inner circumference side of the annular groove. A male thread is formed on the outer circumferential surface of the boss portion, and a female thread is formed on the inner surface of the side plate of the socket support portion to engage with the male thread. The front portion is attached to the main body by screwing the male thread into the female thread. The main body may be provided with an annular flange having a surface parallel to the back surface of the light-transmitting portion, and the flange, the light-transmitting portion, and the front plate may be fixed together in a configuration where the surface of the flange and the back surface of the light-transmitting portion face each other, and the back surface of the flange and the surface of the front plate face each other. The main body may be provided with an annular flange having a surface parallel to the back surface of the light-transmitting portion, and the front panel of the storage box may be interposed between the surface of the flange and the back surface of the light-transmitting portion, with the flange, the front panel, and the light-transmitting portion fixed together. [Effects of the Invention]

[0007] Because this indicator light has a structure in which the main body is held inside the front panel, the translucent portion that protrudes from the front panel can be made thinner. Since the translucent portion can be made thinner, it can be adapted to different installation environments. By forming a recess on the inner circumference of the boss portion on the back surface of the translucent part, which is recessed in a direction away from the light-emitting element, light is diffused in the recess, so that visibility from the side can be ensured even if the amount of protrusion from the front plate is small. Because the recess is formed in a curved shape at the center of the back surface, light is diffused evenly, thus reducing the difference in brightness depending on the viewing angle. On the outer periphery of the recess, an annular protrusion is formed that rises in an annular shape in the direction approaching the light-emitting element, and on the outer periphery of the annular protrusion, an annular recess is formed that is recessed in the direction away from the light-emitting element. Because the annular protrusion rises up and then its outer periphery is recessed, it has a caldera shape, which further diffuses light. By making the recess an annular groove with a triangular cross-section, a light diffusion effect can be obtained in the annular groove. The recess includes an inner groove with a triangular cross-section, formed in the center of the back surface and on the inner circumference of the annular groove, which allows for more effective light diffusion. A male thread is formed on the outer surface of the boss portion, and a female thread is formed on the inner surface of the side plate of the socket support portion that screws into the male thread. By screwing the male thread into the female thread, the front portion is attached to the main body, making it easy to attach and detach the front portion from the main body. The main body is equipped with an annular flange having a surface parallel to the back surface of the translucent section. The flange surface and the back surface of the translucent section face each other, and the back surface of the flange faces the surface of the front panel. With this configuration, the flange, the translucent section, and the front panel are fixed together, allowing the front section to be fixed to the main body to form the indicator light before being attached to the front panel, thus providing high workability. The main body is equipped with a ring-shaped flange having a surface parallel to the back surface of the translucent section, and the front panel of the storage box is interposed between the surface of the flange and the back surface of the translucent section. By fixing the flange, the front panel, and the translucent section together in this configuration, only the translucent section protrudes from the front panel, making it possible to achieve a thinner design. [Brief explanation of the drawing]

[0008] [Figure 1] This is an exploded perspective view showing a first embodiment of the indicator light. [Figure 2] This is a perspective view showing a first embodiment of the indicator light. [Figure 3] This is a cross-sectional view showing the front portion of the first embodiment. [Figure 4] This is a cross-sectional view showing a first embodiment of the indicator light. [Figure 5] This is a perspective view showing the back side of the first embodiment of the indicator light. [Figure 6] This is an exploded perspective view showing a second embodiment of the indicator light. [Figure 7] This is a perspective view showing a second embodiment of the indicator light. [Figure 8] This is a cross-sectional view showing a second embodiment of the indicator light. [Figure 9] This is a perspective view showing the back side of the second embodiment of the indicator light. [Figure 10] This is an exploded perspective view showing a third embodiment of the indicator light. [Figure 11] This is a cross-sectional view showing the front portion of the third embodiment. [Figure 12] This is a cross-sectional view showing a third embodiment of the indicator light. [Figure 13] This is a cross-sectional view showing the front portion of the fourth embodiment. [Figure 14] It is an exploded perspective view showing a fifth embodiment of an indicating lamp.

Mode for Carrying Out the Invention

[0009] 1 First Embodiment The indicating lamp 1 of the first embodiment shown in FIGS. 1 to 5 is installed on the front panel 91 of a storage box 90 in which disaster prevention devices such as fire hydrants and package-type fire extinguishing equipment are stored. It is composed of a main body 10 that holds light bulbs 150a to 150e as light emitters, and a front portion 20 that is attached to the main body 10 and covers the light bulbs 150a to 150e. Note that the light bulbs 150a to 150e are an example of a light emitter, and an LED light bulb or the like can also be used as the light emitter. <0OO0095> The main body 10 is composed of a socket 15 on which light bulbs 150a to 150e as light emitters are mounted, a socket support portion 11 that supports the socket, and an annular plate-shaped flange 12 connected to an end portion of the socket support portion 11. In the example of FIG. 1, five light bulbs 150a to 150e are mounted on the socket 15.

[0011] [[ID=l8]] The socket support portion 11 is formed with a U-shaped cross section as a whole, and is composed of two facing side plates 13 and a bottom plate 14 that connects the end portions of the two side plates 13. The inner side surfaces 130 of the pair of side plates 13 have an inner circumference with the same diameter as the inner circumference of the inner circumferential surface 120 of the flange 12. Female threads 131 are formed on the inner side surfaces 130 of the side plates 13.

[0012] A plurality of long holes 121 through which screws for fixing the main body 10 to the front panel 91 are formed in the flange 12. Although four long holes 121 are formed in the illustrated example, the number is not limited to four. ]>

[0013] <0OO00105>The socket 15 on which the light bulbs l50a to 150e are mounted is fixed to the bottom plate 14 of the socket support portion 11. The socket 15 is provided with an electrode 151 connected to a power source. The socket 15 is fixed to the bottom plate 14 by a screw 152.

[0014] The front section 20 is what is commonly referred to as a globe, and includes a cylindrical boss section 21 and a translucent section 22 formed from one end of the boss section 21, which is larger in diameter than the boss section 21 and emits light emitted from the light bulbs 150a to 150e. The outer circumference of the boss section 21 is provided with a male screw 210 that screws into a female screw 131 formed in the side plate 13 of the main body 10. Corresponding to the boss section 21, a boss through hole 122 is formed on the inside of the inner circumferential surface 120 of the flange 12.

[0015] The translucent portion 22 is formed of, for example, a red translucent polycarbonate resin. In the illustrated example, the surface 220 of the translucent portion 22 is formed as a flat surface, but it may also be a convex curved surface. A tapered surface 221 is formed on the outer circumference of the peripheral edge of the surface 220 of the translucent portion 22, which widens toward the front plate 91. The inside of the cylindrical boss portion 21 has an inner diameter sufficient to accommodate the socket 15.

[0016] The front panel 91 has a through hole 95 in the center for the boss portion 21 of the front section 20 to pass through. Multiple screw holes 92 are formed on the outer circumference of the through hole 95. The boss portion 21 is passed through the through hole 95 and the boss portion through hole 122 formed in the center of the flange 12, causing the boss portion 21 to protrude from the back side of the front panel 91, and the male thread 210 of the boss portion 21 is screwed into the female thread 131 of the socket support portion 11. Then, a screw 93 is passed through the screw hole 92 and the elongated hole 121 from the translucent portion 22 side, and a nut 94 is fastened from the back side 124 of the flange 12, thereby fixing the main body 10, the front panel 91, and the front section 20 as shown in Figure 2. In this state, the translucent portion 22 protrudes from the surface 96 side of the front panel 91, and the front panel 91 of the storage box 90 is interposed between the translucent portion 22 of the front section 20 and the flange 12 of the main body 10.

[0017] As shown in Figure 3, a recess 23 is formed at the center of the back surface 222 of the translucent portion 22, on the inner circumference side of the boss portion 21, in a direction that moves away from the light bulbs 150a to 150e that are mounted in the socket 15. In the example of Figure 3, the recess 23 has a concave curved surface 230.

[0018] Furthermore, an annular projection 24 is formed on the outer circumference of the recess 23, rising in an annular shape in the direction approaching the light bulbs 150b to 150e. The annular projection 24 is formed in a pointed state toward the light bulbs 150b to 150e.

[0019] Furthermore, an annular recess 25 is formed on the outer circumference of the annular protrusion 24, in a direction that moves away from the light bulbs 150b to 150e. The annular recess 25 is connected to the inner circumference of the boss portion 21.

[0020] Thus, on the inner circumference side of the boss portion 21 of the back surface 222 of the translucent portion 22, the recess 23, the annular protrusion 24, and the annular recess 25 are formed in a caldera shape.

[0021] As shown in Figure 4, the back surface 222 of the light-transmitting portion 22 and the front surface 123 of the flange 12 are parallel, one end of the outer circumference of the light-transmitting portion 22 is in contact with the front surface 96 of the front plate 91, the front surface 123 of the flange 12 is in contact with the back surface 97 of the front plate 91, and the front plate 91 is interposed between the front surface 123 of the flange 12 and the back surface 222 of the light-transmitting portion 22.

[0022] Furthermore, in this state, the tips of the light bulbs 150a to 150e mounted in the socket 15 face the recess 23. Light incident on the deepest part of the center of the recess 23 travels straight through the light-transmitting part 22 and is radiated to the outside of the light-transmitting part 22. On the other hand, light incident on a position offset from the deepest part of the recess 23 is refracted and diffused in the concave curved surface 230 in a direction away from the center. In this way, by forming the recess 23 on the back surface 222 of the light-transmitting part 22, the light can be seen from the front and is also easily seen from the side.

[0023] Conventionally, the light bulb was located outside the storage box 90, and the outside of the light bulb was covered with a cover, resulting in a large protrusion from the storage box. However, as shown in Figure 5, the indicator light 1 has a structure that allows the light bulbs 150a to 150e, the socket 15, and the socket support part 11 to be placed inside the front panel 91 of the storage box 90 (inside the storage box). As a result, the light bulbs 150a to 150e do not protrude outside the front panel 91, making it possible to make the light-transmitting part 22 of the front part 20 thinner.

[0024] Furthermore, because it is not affected by the power supply at the installation location, it can be used in a variety of applications.

[0025] Furthermore, by forming an annular protrusion 24 around the recess 23 and increasing the thickness in that area, light can be diffused more easily in the radial direction of the light-transmitting portion 22, thereby improving visibility from the side.

[0026] 2. Second Embodiment The indicator light 2 of the second embodiment shown in Figures 6 to 9 has the same body 10 configuration as the indicator light 1 of the first embodiment, but the front portion 20a differs from the front portion 20 of the first embodiment in that it has a side surface 223 on the tip side of the tapered surface 221. In addition, in the indicator light 1 of the first embodiment, the front plate 91 of the storage box 90 is interposed between the light-transmitting portion 22 of the front portion 20 and the flange 12 of the body 10, whereas in the indicator light 2 of the second embodiment, the front plate 91 is located on the socket support portion 11 side of the flange 12.

[0027] As shown in Figure 6, after passing the socket support part 11 through the through hole 95 of the front plate 91, a screw 93 is passed through the elongated hole 121 and screw hole 92 from the light-transmitting part 22 side, and a nut 94 is fastened from the back surface 97 side of the front plate 91. Then, the boss part 21 is passed through the through hole 95 and the boss part through hole 122 formed in the center of the flange 12, and the male screw 210 of the boss part 21 is screwed into the female screw 131 of the socket support part 11, thereby fixing the main body 10, the front part 20 and the front plate 91 as shown in Figure 7.

[0028] In the indicator light 2 of the second embodiment, as shown in Figure 8, the flange 12, the light-transmitting part 22a, and the front plate 91 are fixed together with the surface 123 of the flange 12 facing the back surface 222 of the light-transmitting part 22a, and the back surface 124 of the flange 12 facing the surface 96 of the front plate 91.

[0029] In this state, the light bulbs 150a to 150e mounted in the socket 15 face the recess 23 formed on the back surface 222 of the light-transmitting portion 22a of the front portion 20. Light incident on the deepest part in the center of the recess 23 travels straight through the light-transmitting portion 22a and is radiated to the outside of the light-transmitting portion 22. On the other hand, light incident on a position offset from the deepest part of the recess 23 is refracted and diffused in the concave curved surface 230 in a direction away from the center. In this way, by forming the recess 23 on the back surface 222 of the light-transmitting portion 22a, the light becomes easier to see from both the front and the side.

[0030] In the second embodiment, the indicator light 2 has a flange 12 that is located outside the front panel 91, so the amount of protrusion from the front panel 91 is slightly larger than that of the indicator light 1 in the first embodiment. However, as shown in Figure 9, the light bulbs 150a to 150e and the socket support part 11 are located inside the front panel 91, so the amount of protrusion from the front panel 91 can be reduced compared to the conventional design. Furthermore, the indicator light 2 of the second embodiment is completed by fixing the main body 10 to the front panel 91 and then attaching the front part 20a. When fixing the main body 10 to the front panel 91, the socket support part 11 is inserted into the through hole 95 and the screw 93 is attached, which stabilizes the flange 12 and makes it easy to attach the screw 93, thus improving ease of installation compared to the indicator light 1 of the first embodiment. It is also similar to the indicator light 1 of the first embodiment in that it can be used universally because it is not affected by the power supply at the installation location.

[0031] Furthermore, similar to the indicator light 1 of the first embodiment, forming an annular protrusion 24 around the recess 23 and increasing the thickness in that area makes it easier for light to travel radially through the light-transmitting portion 22, thereby improving visibility from the side.

[0032] In the first and second embodiments, an annular projection 24 and an annular recess 25 are provided around the recess 23, but the shape may also be such that only the recess 23 is formed in the center of the back surface 222.

[0033] 3. Third Embodiment The indicator light 3 of the third embodiment shown in Figures 10 to 12 has a different structure for the main body 30 and front portion 40 compared to the main body 10 and front portions 20, 20a of the first and second embodiments. In the following description, parts of the main body 30 and front portion 40 that are configured similarly to the main body 10 and front portions 20, 20a of the first and second embodiments will be denoted by the same reference numerals, and their descriptions will be omitted.

[0034] As shown in Figure 10, unlike the side plate 13 of the first and second embodiments, the inner circumferential surface of the side plate 33 of the socket support portion 31 that constitutes the main body 30 does not have female threads formed thereon. However, female threads 341 are formed on the inner circumferential surface 340 of the cylindrical portion 34 that hangs down from the inner circumference of the flange 12.

[0035] As shown in Figure 10, the front portion 40 includes a cylindrical boss portion 41 having a male thread 410 on its outer circumference that screws into a female thread 341 formed on the inner circumferential surface 340 of the cylindrical portion 34, and a translucent portion 42 formed from one end of the boss portion 41 with a larger diameter than the boss portion 41, which emits light emitted from the light bulbs 150a to 150e.

[0036] In the illustrated example, the surface 420 of the translucent portion 42 is formed as a flat surface, but it may also be formed as a convex curved surface. A tapered surface 422 is formed between the surface 420 and the side surface 421 of the translucent portion 42, but the tapered surface 422 is not essential. The interior of the cylindrical boss portion 41 has an inner diameter sufficient to accommodate the socket 15. The axial length of the boss portion 41, the shape of the back surface 423 of the translucent portion 42 shown in Figure 11, and the shapes of the side surface 421 and tapered surface 422 of the translucent portion 42 differ from the front portion 20 of the first and second embodiments.

[0037] The side surface 421 and the tapered surface 422 have irregularities formed along the circumferential direction, with recesses and protrusions alternating. The irregularities formed on the side surface 421 of the translucent portion 42 make it easier to rotate the front portion 40 when attaching or detaching it from the main body 30.

[0038] The boss portion 41 is formed to be shorter than the boss portion 21 of the first and second embodiments. Correspondingly, as shown in Figure 12, the female thread 341 formed on the inner circumferential surface 340 of the cylindrical portion 34 of the socket support portion 31 is also formed to be shorter.

[0039] The overall axial length of the socket support portion 31 is the same as in the first and second embodiments, but by shortening the lengths of the male screw 410 and the female screw 341, the time required to attach and detach the front portion 40 to the main body 30 can be reduced.

[0040] As shown in Figures 11 and 12, an inner groove 43 and an annular groove 44 surrounding it are formed on the back surface 423 of the translucent portion 42. Both the inner groove 43 and the annular groove 44 perform the same functions as the recess 23 in the first and second embodiments. The inner groove 43 has a slope that is deepest at the center of the back surface 423 and becomes shallower towards the outer circumference, forming a triangular cross-section. On the other hand, the annular groove 44 has a slope that deepens towards the outer circumference on the outer circumference side of the inner groove 43, and a slope that becomes shallower towards the outer circumference from its deepest point, forming a triangular annular cross-section. In the example of Figures 11 and 12, the inner groove 43 and the annular groove 44 are formed to the same depth, but the shape is not limited to this. The inner groove 43 faces the central light bulb 150a. On the other hand, the annular groove 44 faces the light bulbs 150b to 150e arranged around the light bulb 150a. The angles of the vertices of the triangles in the cross-sections of the inner groove 43 and the annular groove 44 are, for example, between 30 and 120 degrees.

[0041] A Fresnel lens 45 is formed on the outer circumference of the annular groove 44 on the back surface 423 of the light-transmitting portion 42. As shown in an enlarged view in Figure 11, the Fresnel lens 45 is composed of multiple grooves with a roughly triangular cross-section formed concentrically, with the inner groove 450 being the shallowest, and the depth of the grooves 451 and 452 gradually increasing toward the outer circumference. Each groove 450, 451, and 452 is provided with a vertical wall 453 perpendicular to the back surface 423. Each vertical wall 453 has the same depth at its deepest point (closer to the surface 420), while the opening end of each vertical wall 453 (lower end in Figure 11) is at the deepest position (closer to the surface 420) for the inner vertical wall 453 and at the shallowest position (farthest from the surface 420) for the outermost vertical wall 453. The width of each groove 451, 452, and 453 is, for example, 2.5 mm.

[0042] Light emitted from the central light bulb 150a travels in a straight line and is refracted in the inner groove 43, diffusing outwards. Light emitted from the light bulbs 150b to 150e arranged around the central light bulb 150a is refracted in the annular groove 44, diffusing outwards.

[0043] The Fresnel lens 45 can refract and diffuse light more towards the outer edge. This equalizes brightness, reduces glare, and allows visibility from both the front and the side. Furthermore, by incorporating the Fresnel lens 45, light can be diffused without increasing the thickness of the light-transmitting section 42.

[0044] In the indicator light 3 of the third embodiment, the structure allows the light bulbs 150a to 150e and the socket support part 31 to be arranged inside the front panel 91 of the storage box 90. As a result, the light bulbs 150a to 150e do not protrude outside the front panel 91, making it possible to make the light-transmitting part 42 of the front part 40 thinner.

[0045] In the third embodiment, as in the second embodiment, the front plate 91 is located on the socket support portion 31 side of the flange 12, but it may also be installed so that the front plate 91 is interposed between the light-transmitting portion 42 and the flange 12.

[0046] 4. Fourth Embodiment Figure 13 shows the front portion 50 constituting the indicator light of the fourth embodiment. A recess 53 is formed on the back surface 523 of the light-transmitting portion 52 of this front portion 50. The recess 53 is formed as a concave curved surface that is gentler (larger radius of curvature) than the curved surface of the recess 23 of the first and second embodiments. This recess 23 does not have an internal groove 43 equivalent to that of the third embodiment, but it is provided with an annular groove 54 as a recess. The annular groove 54 is formed deeper than the annular groove 44 of the third embodiment.

[0047] Furthermore, a Fresnel lens 45 is formed on the outer circumference of the annular groove 54. The Fresnel lens 45 is formed in the same manner as the light-transmitting portion 42 in the third embodiment.

[0048] In the front section 50 of the fourth embodiment, the light emitted from the light bulbs 150a to 150e is refracted in the annular groove 54 and diffused outwards, making the light easily visible from both the front and the side. Furthermore, by providing the Fresnel lens 45, the light is refracted and diffused further outwards, resulting in more uniform brightness and reduced glare.

[0049] Furthermore, as in the first embodiment, the front plate 91 may be interposed between the light-transmitting portion 52 and the flange 12, or as in the second and third embodiments, the front plate 91 may be positioned closer to the socket support portion 31 than to the flange 12.

[0050] 5. Fifth Embodiment In the fifth embodiment shown in Figure 14, the main body 30 is configured in the same way as in the third embodiment shown in Figure 10, but the front portion 60 differs from the front portion 40 of the third embodiment. Parts configured in the same way as the front portion 40 are denoted by the same reference numerals as in the third embodiment in Figure 14, and their descriptions are omitted. The front portion 60 of the fifth embodiment differs from the translucent portion 42 of the front portion 40 of the third embodiment in that the tapered surface 622 of the translucent portion 62 does not have irregularities formed on it. On the other hand, the side surface 421 of the translucent portion 62 has irregularities formed on it, which is the same as the translucent portion 42 of the front portion 40 of the third embodiment. The back surface of the translucent portion 62 of the front portion 60 may be configured in the same way as in the third embodiment shown in Figures 11 and 12, or it may be configured as in the fourth embodiment shown in Figure 13. In the fifth embodiment, the front portion 60 does not have irregularities formed on the tapered surface 622, but irregularities are formed on the side surface 421, making it easier to rotate the front portion 60 when attaching or detaching it from the main body 30. [Explanation of symbols]

[0051] 1, 2, 3, 4: Indicator light 10: Main unit 11: Socket support 12: Flange 120: Inner circumferential surface 121: Slotted hole 122: Through hole in boss section 123: Front side 124: Back side 13: Side panel 130: Inner surface 131: Female thread 14: Bottom plate 15: Socket 151: Electrode 152: Screw 150a~150e: Light bulb 20: Front section 21: Boss Section 210: Male screw 22: Translucent part 220: Front surface 221: Tapered surface 222: Back surface 223: Side view 23: Recess 230: Concave surface 24: Annular convex part 25: Annular recess 30: Main unit 31: Light-emitting element support part 33: Side plate 34: Cylindrical section 340: Inner surface 341: Female thread 40: Front section 41: Boss Section 410: Male screw 42: Translucent part 420: Front surface 421: Side surface 422: Tapered surface 423: Back surface 43: Internal groove 44: Ring groove 45: Fresnel lens 450, 451, 452: Groove 453: Vertical wall 50: Front section 52: Translucent area 523: Back surface 53: Recess 54: Annular groove 90: Storage box 91: Front panel 92: Screw hole 93: Screw 94: Nut 95: Through hole 96: Front side 97: Back side

Claims

1. An indicator light installed on the front panel of a storage box in which disaster prevention equipment is stored, It comprises a main body that holds a light-emitting element via a socket, and a front part that is attached to the main body and covers the light-emitting element. The front portion is composed of a light-transmitting portion that protrudes from the surface side of the front plate and emits light emitted from the light-emitting element, and a cylindrical boss portion that protrudes from the light-transmitting portion through a through hole formed in the front plate and onto the back side of the front plate. The main body comprises a boss through-hole that penetrates the boss portion, a socket into which the light-emitting element is mounted, and a socket support portion that supports the socket. The light-emitting element, the socket, and the socket support are arranged inside the storage box. Indicator light.

2. On the inner circumference side of the boss portion on the back surface of the light-transmitting portion, a recess is formed that is recessed in a direction away from the light-emitting body. The indicator light according to claim 1.

3. The recess is formed in a curved shape at the center of the back surface. The indicator light according to claim 2.

4. An annular protrusion is formed on the outer circumference of the recess, which rises in an annular shape in the direction approaching the light-emitting element. An annular recess is formed on the outer circumference of the annular protrusion, in a direction that moves away from the light-emitting element. The indicator light according to claim 3.

5. The recess is an annular groove with a triangular cross-section. The indicator light according to claim 2.

6. The recess includes an inner groove with a triangular cross-section, formed at the center of the back surface and on the inner circumference side of the annular groove. The indicator light according to claim 5.

7. A male thread is formed on the outer circumferential surface of the boss portion, and a female thread is formed on the inner surface of the side plate of the socket support portion to be screwed into the male thread. The front portion is attached to the main body by screwing the male thread into the female thread. The indicator light according to claim 1.

8. The main body is provided with an annular plate-shaped flange having a surface parallel to the back surface of the light-transmitting portion, The flange, the light-transmitting portion, and the front plate are fixed together with the surface of the flange facing the back of the light-transmitting portion and the back of the flange facing the surface of the front plate. The indicator light according to claim 1.

9. The main body is provided with an annular plate-shaped flange having a surface parallel to the back surface of the light-transmitting portion, The front panel of the storage box is interposed between the surface of the flange and the back surface of the light-transmitting portion, and the flange, the front panel, and the light-transmitting portion are fixed together. The indicator light according to claim 1.

Images