JP4889076B2 - Indicator light - Google Patents

Description

  The present invention relates to a display device, and more particularly to a display device such as an indicator lamp that indicates an energized state.

  Conventionally, the switch is provided with the indicator lamp which consists of a red light emitting diode as it describes in the nonpatent literature 1, for example. The indicator lamp is lit when the switch is on. For this reason, the on / off state of the switch can be visually recognized.

SMC Corporation Thin Cylinder C5 Series Catalog CAT. S20-184, page 14

  However, a light emitting diode generally has a narrow irradiation angle. Therefore, when it is necessary to attach the switch in such a way that the light-emitting diode is difficult to see, even if the indicator lamp emits light, it cannot be visually recognized. In this case, the corner indicator lamp is not effectively used.

  Some light emitting diodes have a lens attached to the light emitting surface in order to compensate for the narrow angle of illumination. Even in a light emitting diode with a lens, the irradiation angle is limited. In addition, the size of the switch is increased by the amount of the light emitting diode lens.

  In addition, there is a demand for an existing switch of a type that does not include an indicator lamp so that the on / off state of the switch can be visually recognized.

  In view of the above circumstances, an object of the present invention is to provide a display device having excellent visibility and the like.

  In order to solve the above problems, in the display device of the present invention, the light emitting surface of the light emitting element is covered with a light projecting resin containing a diffuser. For this reason, the emitted light from the light emitting element becomes diffused light when emitted to the outside of the resin. Therefore, the light from the light emitting element is emitted also in the horizontal direction of the indicator lamp, and the on / off state of the switch can be visually recognized even when the irradiation angle of the light emitting element is narrow.

  The indicator lamp which is a display device can be attached to a sheath containing two or more conductors covered with an insulator, and includes a first connection portion connected to one of the conductors, Light projection comprising a second connecting portion connected to the other, a light emitting element provided between the first connecting portion and the second connecting portion, and a light diffuser covering at least the light emitting element A functional resin.

  If this indicator lamp is on the sheath, it can be attached at a position convenient for the user. Therefore, the indicator lamp is effectively used.

  The indicator lamp body may be covered with a resin containing a diffuser that diffuses light from the light emitting element. In this way, the indicator lamp is blocked from the outside air, so that the waterproofness of the indicator lamp is enhanced. An advantage is that both the coating of the light emitting element and the coating of the indicator lamp body can be performed at a time.

  As this resin, a hot melt resin excellent in handleability is preferably used. In particular, if a mixture of a hot melt resin that is transparent when solid and a colored hot melt resin when solid is used, the colored hot melt resin functions as a diffuser. It is preferable in that it is not necessary.

  The first and second connection portions may have a cutting portion for cutting a contact portion of the insulator. This eliminates the troublesome work of cutting the insulator using a tool such as a nipper when the indicator lamp is attached to the sheath.

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

  FIG. 1 is a schematic diagram of an indicator lamp body 90 according to an embodiment of the present invention. 1A is a side view of the indicator lamp body 90 in the longitudinal direction, FIG. 1B is a bottom view of the indicator lamp body 90, and FIG. 1C is a side view of the indicator lamp body 90 in the short direction. ing.

  The indicator lamp main body 90 is hard, for example, a polyamide resin containing about 10 to 30% glass fiber or a polybutylene terephthalate (PBT) resin containing about 10 to 30% glass fiber. A housing 91 made of resin is provided.

  As shown in FIG. 1A, the casing 91 has a substantially rectangular parallelepiped shape. Moreover, as shown in FIG.1 (c), the housing 91 has the arch-shaped opening part 92 formed in the side surface of a transversal direction. As shown in FIG. 1B, the opening 92 functions as a sheath receiving portion that receives the sheath 10.

  Here, the sheath 10 includes conductors covered with the insulators 12, 14, and 16, respectively. These conductors include, for example, those connected to the positive terminal of the switch to which the indicator lamp is connected, those connected to the negative terminal of the switch, and those connected to the external terminal of the switch.

  Hereinafter, it is assumed that the conductor related to the insulator 12 is connected to the negative terminal of the switch, and the conductor related to the insulator 16 is connected to the positive terminal of the switch.

  Moreover, the bottom surface of the housing 91 is opened except for the corner portions 93 to 96 as shown in FIG. The side surfaces in the longitudinal direction of the housing 91 are also opened between the side surfaces of the corner portions 93 to 96. The inside of the housing 91 is hollow except for a portion where the notch contacts 84 and 86 which are crimp terminals described below are located.

  As shown in FIG. 1A, an LED 80 that is a light emitting element and a resistor 82 for causing a required current to flow through the LED 80 are attached to the upper surface of the housing 91. The first terminal of the LED 80 and the first terminal of the resistor 82 are connected in series with each other, for example, by soldering. The LED 80 and the resistor 82 are chip-shaped in order to reduce the size and weight.

  A through hole (not shown) through which the notch contact 84 passes is formed adjacent to the second terminal of the LED 80. The second terminal of the LED 80 is connected to the upper end of the notch contact 84 by soldering or the like. That is, the second terminal of the LED 80 is connected to a relatively low voltage terminal among the terminals of the switch to which the indicator lamp is connected.

  Similarly, a through hole (not shown) through which the notch contact 86 passes is formed adjacent to the second terminal of the resistor 82. The second terminal of the resistor 82 is connected to the upper side of the notch contact 86 by soldering or the like. That is, the second terminal of the resistor 82 is connected to a relatively high voltage terminal among the terminals of the switch to which the indicator lamp is connected.

  The notch contacts 84 and 86 have a notch portion at the bottom. The width of the notch portion is wide at the lower end, but other than that, it is about half the inner diameter of the insulators 12, 14, and 16, in other words, about half the outer diameter of the conductors 18, 20, and 22.

  When the conductor covered with the insulator 12 is pushed into the notch portion, only the insulator 12 is cut by the notch portion, and the conductor covered with the insulator 12 and the notch contact 84 come into contact with each other, and these are electrically connected. Connected. At this time, since the conductor is pushed by a notch portion smaller than the outer diameter, the shape of the conductor is elongated. As described above, when the notch contacts 84 and 86 having the notch portions having the above conditions are used, the notch contact 84 and the conductor are electrically connected to each other without the process of cutting the insulator 12 with a tool such as a nipper. Can be realized.

  The indicator lamp body 90 is covered with resin. As for the shape of this resin, for example, the bottom is flat and the cross section perpendicular to the longitudinal direction is arched. In this embodiment, this resin is a mixture of a black hot melt and a transparent hot melt. Such a resin is black and translucent.

  This resin may be mixed at a ratio of, for example, 1: 2 to 2: 1. The mixing ratio depends on the luminance and irradiation angle of the LED 80. The higher the luminance and the narrower the irradiation angle, the better the black hot melt content. The black hot melt functions as a diffuser that diffuses the light emitted from the LED 80. For this reason, even if it is a case where an indicator lamp is seen from a horizontal direction, the state which LED80 is light-emitting can be visually recognized.

  By the way, the LED 80 was turned on using a red chip LED as the LED 80 and covering the indicator lamp main body 90 only with a transparent hot melt resin. In this case, the irradiation light of the LED 80 could not be visually recognized at a position outside the irradiation angle of the LED 80. Further, when the periphery of the indicator lamp was bright, it was difficult to visually recognize this light. In these respects, the LED 80 was not a chip LED, but a lens-equipped LED was not significantly different.

  On the other hand, when a mixture of a black hot melt resin and a transparent hot melt resin is used, even if the LED 80 is outside the irradiation angle, the indicator lamp is bright. Also, the irradiation light was visible.

  Note that the emission color of the LED 80 and the color of the hot melt are not limited to those described above. For example, a blue LED or a green LED can be used, or a yellow hot melt resin including light yellow or a white hot melt resin can be used. Can also be used. In particular, the emission color of the LED 80 and the color of the hot melt may be related to or close to complementary colors.

  Next, a method for attaching the indicator lamp to the sheath 10 will be described. First, an indicator lamp main body 90 as shown in FIG. Further, prior to attaching the sheath 10 to the indicator lamp, the sheath 10 itself is divided. Then, both sides of the sheath 10 are pulled toward each other with the divided portion as the center, so that the insulators 12, 14, and 16 are exposed.

  Then, the insulator 12 is pushed into the notch portion of the notch contact 84. In this way, the notch contact 84 and the conductor covered with the insulator 12 are electrically connected. Subsequently, the insulator 16 is pushed into the notch portion of the notch contact 86. In this way, the notch contact 86 and the conductor covered with the insulator 16 are electrically connected.

  The conductor covered with the insulator 14 is not pushed into any of the notch contacts 84 and 86 but passes through the notch contacts 84 and 86. Then, the sheath 10 is pushed into the opening 92. Through the above operations, the indicator lamp main body 90 is attached to the sheath 10 as shown in FIG. Finally, the indicator lamp body 90 is covered with a mixture of a colored hot melt and a transparent hot melt, whereby the attachment of the indicator lamp to the sheath 10 is completed.

  The material, shape, etc. of the indicator lamp are not limited to those described above. In order to improve the visibility of the irradiation light from the LED 80, at least the upper part of the LED 80 only needs to be covered with a light-projecting resin containing a diffuser.

  Moreover, when the waterproofness of the indicator lamp is unnecessary, the indicator lamp main body 90 does not necessarily need to be covered with resin or the like.

  As described above, in the present embodiment, the case where the present invention is applied to the indicator lamp has been described as an example. However, all of those in which at least the light emitting surface of the light emitting element is covered with a light-projecting resin containing a diffuser are included in the present invention. Examples of applicable devices in the category include display devices such as traffic lights, displays, and automobile tail lamps.

  The present invention can be widely applied to the entire switch industry.

It is a schematic diagram of the indicator lamp main body 90 of embodiment of this invention.

Explanation of symbols

10 Sheath part 12, 14, 16 Insulator 80 LED
82 Resistance 84, 86 Notch contact 90 Indicator lamp body 91 Case 92 Opening 93-96 Corner

Claims (5)

A housing,
A light emitting element attached to the housing;
A light projecting resin containing a light diffuser for diffusing light from the light emitting element and covering a light emitting surface of the light emitting element;
First and second connecting portions connected to each terminal of the light emitting element,
The housing is formed with an opening for receiving a sheath containing a plurality of conductors,
The first and second connection portions have a cutting portion for cutting a contact portion with an insulator covering each conductor.
Display equipment.   The display device according to claim 1, wherein the cutting portion is a notch portion.   The display device according to claim 1, wherein the light projecting resin is a hot melt resin.   The display device according to claim 1, wherein the light projecting resin is a resin in which a hot melt resin that is transparent when solid is mixed with a hot melt resin that is colored when solid that becomes the diffuser.   The display device according to claim 1, wherein the diffuser is a colored hot melt resin.

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