JP2019021525A - Pilot lamp - Google Patents

Abstract

To provide a pilot lamp having an annular light-emitting display part, not needing to increase the number of light-emitting sources, and further excellent in designability.SOLUTION: A pilot lamp 1 comprises a transmitter storage part 13, and a light-emitting display part 11 formed so as to surround the periphery of the transmitter storage part 13 and configured to transmit light emitted from a light-emitting source to emit light. The pilot lamp has a light guide plate 15 on whose back face side a reflection surface 15a is formed, and which is configured to diffuse light made incident from a side surface to make a surface bright as a light-emitting surface. The light-emitting display part 11 is configured to emit light by light emitted from the light guide plate 15.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an indicator lamp that displays the position of a disaster prevention device such as a transmitter attached to a fire hydrant box, a device storage box, or the like.

  As an example of the indicator lamp, for example, Patent Document 1 (Design Registration No. 1460558) includes a “transparent member having a substantially rectangular opening for attaching a transmitter at the center and colored in red. Annular indicator lamp body, screwed detachably to the indicator lamp body, and an annular attachment member for attaching the indicator lamp body to a fire hydrant storage box, etc., and sandwiched and fixed between the indicator lamp body and the attachment member, It is composed of an annular substrate on which light-emitting diodes (LED lamps) are attached at equal angles, and the light emitted from the light-emitting diodes arranged in the annular space of the indicator lamp body is radiated in the form of a ring in the front and surroundings. "(Description of the article relating to the design in Patent Document 1)" is disclosed.

  In the above indicator lamps, visibility can be improved by emitting light in a ring shape, and a transmitter can be attached to the center of the indicator lamp, so that the indicator lamp and transmitter are installed at different positions. The area required for installation can be reduced.

Design Registration No. 1460558

The indicator lamp disclosed in Patent Document 1 improves the visibility by arranging a large number of light emitting diodes at equal intervals to make the annular light emitting display portion shine.
However, a large number of light-emitting diodes are required to illuminate the entire circumference of the annular shape, and therefore, a substrate that extends over the entire circumference of the annular shape is also required.
Further, since the light emitting display portion is made to shine by the scattered light emitting diodes, it seems that light is scattered at a certain place of the light emitting diodes, which is not preferable in terms of design.

  The present invention has been made to solve such a problem, and an object of the present invention is to obtain an indicator lamp excellent in design without increasing the number of light emitting sources when the light emitting display portion is annular. .

(1) An indicator lamp according to the present invention includes a transmitter housing portion and a light emitting display portion that is formed so as to surround the transmitter housing portion and transmits light emitted from a light emitting source to emit light. An indicator light,
A reflective surface is formed on the back side, and has a light guide plate that diffuses light incident from the side surface and shines with the surface side as a light emitting surface, and the light emitting display unit is configured to emit light by light emitted from the light guide plate. It is characterized by that.

(2) Further, in the above-described (1), the light guide plate is formed of a ring-shaped tubular body, and a cut portion or a recessed portion recessed in the height direction is formed in a part of the tubular body in the circumferential direction. Further, the side surface on which the light source enters the light toward the circumferential direction of the cylindrical body is formed by the cut portion or the concave portion.

  In the present invention, since the light emitting display unit is made to shine by the light guide plate, the number of light emitting sources can be reduced, therefore the substrate can be reduced in size, and the surface is not in the form of light that is scattered with the light emitting sources. Since it can be shined, it is excellent in design.

It is a perspective view of the indicator lamp which concerns on one embodiment of this invention. It is the disassembled perspective view seen from the front side of the indicator lamp shown in FIG. It is the disassembled perspective view seen from the back side of the indicator lamp shown in FIG. It is sectional drawing of the indicator lamp shown in FIG. It is a disassembled perspective view of the indicator lamp which concerns on other embodiment of this invention. It is sectional drawing of the indicator lamp shown in FIG.

[Embodiment 1]
As shown in FIGS. 1 to 4, the indicator lamp 1 according to the present embodiment has an outer peripheral wall portion 3 made of a substantially cylindrical body, and a flange shape projecting outward from an outer peripheral surface on the front end side of the outer peripheral wall portion 3. A ring shape between the inner peripheral wall portion 7 and the outer peripheral wall portion 3, and the inner peripheral wall portion 7 formed on the inner peripheral side of the outer peripheral wall portion 3 at a predetermined distance from the outer peripheral wall portion 3. The light emitting display unit 11 is formed by transmitting the light emitted from the LED 9 as a light emitting source, and the transmitter housing unit 13 is formed inside the inner peripheral wall 7.

In addition, the outer peripheral wall part 3, the attachment part 5, the inner peripheral wall part 7, and the transmitter accommodating part 13 comprise the main-body part of the indicator lamp 1, and this main-body part is shape | molded by integral molding of resin. Further, the light emitting display unit 11 is configured by a light emitting surface 15b of a light guide plate 15 formed of a ring-shaped cylindrical body as will be described later, but the light guide plate 15 is separate from the main body unit. In such a case, the light guide plate 15 that forms the light emitting display portion 11 can be formed by so-called insert molding in which the light guide plate 15 is inserted into a mold for molding the main body portion in advance and injection molded.
Hereinafter, each configuration will be described in detail.

<Outer peripheral wall>
The outer peripheral wall portion 3 is formed in a substantially short cylindrical shape by a resin member constituting the main body portion.

<Mounting part>
The attachment portion 5 is for attaching the indicator lamp 1 to the attachment surface, and is formed in a substantially square flange shape projecting outward from the outer peripheral surface on the front end side of the outer peripheral wall portion 3.
As shown in FIGS. 1 and 2, screw holes 5 a for attaching the indicator lamp 1 to the attachment surface are provided at the four corners of the attachment portion 5.
The attachment portion 5 is provided with a ring-shaped standing piece portion 5 b that borders the outer periphery of the light emitting display portion 11. When the indicator lamp 1 is attached to the attachment surface, the upright piece 5b has a function of positioning (positioning) the indicator lamp 1 by contacting the edge of the opening provided on the attachment surface from the inside. Yes.

<Inner wall>
The inner peripheral wall portion 7 is a circular wall portion formed on the inner peripheral side of the outer peripheral wall portion 3 at a predetermined interval from the outer peripheral wall portion 3. Due to the presence of the inner peripheral wall portion 7, a cylindrical gap is formed between the outer peripheral wall portion 3 and the light guide plate 15 made of a ring-shaped cylindrical body that forms the light emitting display portion 11 in the gap. It can be inserted.

<Light emission display>
The light emitting display unit 11 is formed so as to surround a transmitter housing unit 13 to be described later, and transmits light emitted from the light emitting source (LED 9) to transmit light. The light emitting display unit 11 is formed with a reflective surface 15a formed with reflective dots 17 on the back side, and diffuses light incident from the side surface (light incident in the circumferential direction) to illuminate the light emitting surface 15b (front surface). It is formed by the light emitting surface 15 b of the ring-shaped light guide plate 15.
In general, the light guide plate is a thin panel that diffuses light incident from the side surface (thickness portion of the plate) of the acrylic plate and emits uniform light on the surface of the acrylic plate.
When light is incident from the side of the acrylic plate without any processing, the light is totally reflected on the back and surface of the acrylic plate and exits from the other end surface, but the light guide plate is a special reflective surface on the back side of the acrylic plate. By forming (reflective dots), the light guided from the light source into the acrylic light guide plate is guided to the acrylic plate surface using the total reflection of the acrylic plate, and the light hitting the reflective dots changes its path, The light guide plate surface shines by utilizing the fact that light having an angle smaller than the total reflection angle emerges from the acrylic plate surface.

  As described above, a general light guide plate is a thin plate used for a display unit such as a monitor, but the light guide plate 15 of the present invention is formed of a ring-shaped cylindrical body, which is shown in FIGS. As shown in the figure, a concave portion 19 that is recessed in the height direction is formed in a part of the circumferential direction of the cylindrical body, and by forming the concave portion 19, both side walls 21 of the concave portion 19 function as side surfaces on which light is incident. It has become. Then, one end surface in the height direction of the cylindrical body becomes a light emitting surface 15b that emits light and emits light (surface with a gray color in the drawing), and the other end surface has a reflecting surface 15a (with dots in the drawing). Surface).

  The light incident on the light guide plate 15 is repeatedly reflected on the inner surface and the rear surface and spreads throughout the light guide plate 15. At this time, if there are reflection dots 17, the light is scattered there, and the light goes out from the light emitting surface 15 b of the light guide plate 15. Such a light guide plate 15 can easily change how light is emitted from the surface by appropriately changing the area, density, and the like of the reflective dots 17. For example, by reducing the area of the reflective dots 17 close to the light incident position (or making the density sparse) and increasing the area of the reflective dots 17 farther away from the light incident position (or making the density dense). The entire light guide plate 15 can be illuminated uniformly.

The reflective surface 15a is formed by, for example, a method of forming dots with a laser wave, a method of forming a dot pattern by silk printing, a method of cutting a groove with a plotter, a method of pouring acrylic into a mold material to form a predetermined dot pattern, etc. A method used for manufacturing a general light guide plate can be applied.
In addition, it is not always preferable that the light-emitting display unit 11 emits light uniformly. For example, in a state in which the indicator lamp 1 is installed, visibility is improved by making an arbitrary place such as left and right or up and down shine brighter than others. May be possible. As described above, in the case where a change is made in the way the light emitting display unit 11 shines, it can be easily dealt with only by changing the dot pattern of the reflecting surface 15a.

<Light source>
The light emitting source is composed of the LEDs 9 mounted on the substrate 23, and the substrate 23 is placed on the back side of the transmitter housing portion 13 so that the LEDs 9 are housed in the concave portions 19 of the light guide plate 15 as shown in FIGS. Secure with screws.
In the present embodiment, since a single light source is sufficient, the substrate 23 can be reduced in size, whereby the shape of the entire indicator lamp 1 can be reduced.
In the present embodiment, since the light emitting surface 15b of the light guide plate 15 serves as the light emitting display unit 11, it is preferable to use a red LED 9 as the LED 9.

<Transmitter storage>
As shown in FIGS. 1 and 3, the transmitter housing 13 is formed inside the inner peripheral wall, and includes a flat surface 27 provided with screw holes 25 for attaching the transmitter 30, and a flat surface 27. A rectangular opening 29 for inserting the main body of the transmitter 30 is provided at the center.

  As shown in FIGS. 2 and 3, the transmitter 30 stored in the transmitter storage unit 13 includes a push button 31 that transmits a fire signal when pressed, a push button storage unit 33 that has a disk shape, and a push button. A transmitter body 35 formed on the back side of the button storage 33.

The push button storage section 33 is provided with a telephone jack window door 37 that is provided inside the push button storage section 33 and covers a telephone jack (not shown) to which a handset is connected.
The transmitter body 35 has a box shape and stores therein a switch or the like (not shown) linked to the push button 31.

  As shown in FIGS. 1 and 4, when the transmitter 30 is housed in the transmitter housing portion 13 of the indicator lamp 1, the transmitter 30 is surrounded by the light emitting display portion 11, and the inner peripheral edge of the light emitting display portion 11 and a substantially surface. Arranged to be one. In this state, the position of the transmitter 30 is displayed when the light emitting display unit 11 of the indicator lamp 1 shines.

In the present embodiment configured as described above, since the light emitting display unit 11 is configured by the light emitting surface 15b of the light guide plate 15, the entire surface of the light emitting surface 15b is equalized or desired by a single light source. It is possible to shine by the method of shining, and since the light from a plurality of light emitting sources is not scattered like in the conventional example, the design is excellent.
In addition, by using the light guide plate 15, the way of illuminating the light emitting surface 15b can be changed in any way depending on how the reflecting surface 15a is formed.

  In addition, a reflection sheet may be attached to both peripheral surfaces (the outer peripheral surface 15c and the inner peripheral surface 15d of the cylindrical body) of the cylindrical light guide plate 15 in order to prevent light from being emitted to the outside. . Further, instead of the reflection sheet, the main body of the indicator lamp 1 may be formed from a light-impermeable resin, or at least the outer peripheral wall 3 and the inner peripheral wall 7 are formed from a light-impermeable resin. Just do it.

[Embodiment 2]
The light emitting display unit 11 in the indicator lamp 1 of the first embodiment is formed by the light emitting surface 15b itself of the light guide plate 15, but the light emitting display unit 41 of the display lamp 39 of the present embodiment has a main body portion. The light guide plate 43 is arranged on the back side of the resin formed.
What is necessary is just to insert the light-guide plate 43 in the groove part between the inner peripheral wall part 7 and the outer peripheral wall part 3 (refer FIG. 6).

  In the present embodiment, since the light emitting display portion 41 is formed of a resin that forms the main body portion, a general white color LED 9 may be used as long as the resin is red. .

  Although the light guide plate 15 of the first embodiment is a ring connected in the circumferential direction, the light guide plate 43 of the present embodiment has a cutting portion 44 formed in a part of the ring as shown in FIG. This is a so-called C-shaped ring. The configuration of the light guide plate 43 is the same as that of the light guide plate 15 except that a cut portion 44 is provided instead of the concave portion 19 of the light guide plate 15 of the first embodiment, and a reflective surface (not shown) and a light emitting surface 43b. have.

As an example in the present embodiment, the light guide plate 43 does not have to be a connected ring, and may have a substantially ring shape as a whole. For example, two semicircular light guide plates are ring-shaped. The light emitting sources may be arranged on the side surfaces of the end portions of the respective light guide plates.
In this embodiment, in order to prevent light from being emitted to the outside, a reflection sheet is attached to both peripheral surfaces of the light guide plate 43, or the outer peripheral wall portion 3 and the inner peripheral wall portion 7 are made opaque. What is necessary is just to form with resin etc.

DESCRIPTION OF SYMBOLS 1 Indicator lamp 3 Outer peripheral wall part 5 Mounting part 5a Screw hole 5b Standing piece part 7 Inner peripheral wall part 9 LED
DESCRIPTION OF SYMBOLS 11 Light emission display part 13 Transmitter accommodating part 15 Light guide plate 15a Reflective surface 15b Light emission surface 15c Outer peripheral surface 15d Inner peripheral surface 17 Reflective dot 19 Recessed part 21 Both side wall 23 Board | substrate 25 Screw hole 27 Flat surface 29 Opening part 30 Transmitter 31 Push button 33 Push Button Storage Unit 35 Transmitter Body 37 Phone Jack Window Door 39 Indicator Light (Embodiment 2)
41 Light-Emitting Display Unit 43 Light Guide Plate 43b Light-Emitting Surface 44 Cutting Unit

Claims (2)

An indicator lamp comprising a transmitter housing portion and a light emitting display portion that is formed so as to surround the transmitter housing portion and transmits light emitted from a light emitting source to emit light.
A reflective surface is formed on the back side, and has a light guide plate that diffuses light incident from the side surface and shines with the surface side as a light emitting surface, and the light emitting display unit is configured to emit light by light emitted from the light guide plate. An indicator light characterized by   The light guide plate is formed of a ring-shaped cylindrical body, and a cut portion or a concave portion recessed in the height direction is formed in a part of the cylindrical body in the circumferential direction, and the light emitting source is formed into the cylindrical body by the cut portion or the concave portion. The indicator lamp according to claim 1, wherein the side surface on which light is incident in the circumferential direction is formed.