JPH089660Y2 - Luminous needle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a light emitting needle.

[Prior Art and its Problems] Conventionally, a light emitting needle using an electroluminescence element (hereinafter referred to as “EL element”) that can read time even in a dark place has been known. However, since the conventional light emitting needle emits light of a single color, there is a problem that the entire needle is dark and difficult to see, and the decorativeness is poor.

Therefore, an object of the present invention is to provide a light emitting needle that emits light from the upper surface of the needle and emits light of a different color from the light emitted from the upper surface from the end surface of the needle.

[Means for Solving the Problems] In order to achieve the above object, a light emitting needle of the present invention comprises a needle body, a translucent fluorescent plate provided on an upper surface of the needle body, and a lower surface of the needle body. It consists of an electroluminescent element provided, the needle body located between this electroluminescent element and the fluorescent plate, there is a through hole for introducing the light emitted by the electroluminescent element into the fluorescent plate, The fluorescent plate is formed in a color different from the emission color of the electroluminescent element, and the light emitted by the electroluminescent element is taken in from the through hole part of the needle body and part of this light is transmitted to make the upper surface of the needle part. In addition, the remaining light can be condensed internally and emitted from the end face. The fluorescent plate preferably comprises a stack of at least two fluorescent plates, each fluorescent plate containing a fluorescent dye of a different color.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 to 3, a transparent fluorescent plate 4 is fixed to the upper surface of the needle body 1, and an EL element 3 is fixed to the lower surface of the needle body 1. The needle body 1 located between the EL element 3 and the fluorescent plate 4 is provided with a through hole 2 for introducing the light emitted from the EL element 3 into the fluorescent plate 4. The fluorescent plate 4 is formed in a color different from the emission color of the EL element 3.

The fluorescent plate 4 is formed by laminating and bonding two fluorescent plates 5 and 6, and these fluorescent plates 5 and 6 contain fluorescent dyes of different colors. The end faces of the fluorescent plates 5 and 6 are provided so as to be inclined obliquely outward from the outer periphery of the lower surface of the fluorescent plates 5 and 6. The fluorescent plate 4 is provided with a contact base 7 made of an insulating material, and the lower surface of the contact base 7 is provided with a downward projection 7a.

Through holes 4a and 1a are provided in the fluorescent plate 4 and the needle body 1 at positions facing the protrusions 7a of the contact base 7. The contact base 7 is fixed to the needle body 1 with the projection 7a penetrating the through holes 4a and 1a and protruding to the lower surface of the needle body 1. On the upper surface of the contact base 7, a ring-shaped protrusion is formed concentrically with the center of rotation of the needle body 1.
7b is provided, and two ring-shaped conductors 8 and 9 are arranged on the outer side and the inner side of the ridge 7b. L-shaped connecting pieces 8a and 9a are bent on a part of each ring-shaped conductor 8 and 9, and these connecting pieces penetrate the contact base 7 and project to the lower surface of the needle body 1. .

A pair of contact pieces 11 and 12 are fixed to the insulating plate 10. Further, the insulating plate 10 is provided with a through hole 10a at a position facing the protrusion 7a of the contact base 7 projecting from the lower surface of the needle body 1. The insulating plate 10 is fixed to the lower surface of the needle body 1 with the projection 7a penetrating the through hole 10a. Then, the tip portion of the protrusion 7a protruding from the lower surface of the insulating plate 10 is welded to the insulating plate 10,
The insulating plate 10 is not detachable from the needle body 1. In this way, the contact pieces 11, 12 are attached to the lower surface of the needle body 1.

The contact pieces 11 and 12 supply electric power for driving the EL element 3 provided on the needle body 1, and the contact points 11a and 11b.
And 12a and 12b respectively. Contacts 11a, 11b and 12
The a and 12b are formed so that their movement loci are concentric circles with respect to the center of rotation of the needle body 1.

The two ring-shaped conductors 8 and 9 are electrically connected to the pair of contact pieces 11 and 12, and the connection piece 8a of the ring-shaped conductor 8 is provided.
Is connected to the contact piece 11 and the connecting piece 9a of the ring-shaped conductor 9 is connected to the contact piece 12 with solder 13 respectively. EL element 3
The lead-out electrodes 3a and 3b of the
It is fixed and connected with.

 Next, driving of the light emitting needle will be described.

The light emitting hands are incorporated in a device such as a clock (not shown), and when electric power is supplied to the contacts 12a, 12b from the drive circuit incorporated in the device in the evening, it becomes dark to the contacts 12a, 12b. The electric power supplied to the contact 12 by the contacts 12a and 12b, and then E
It conducts to one extraction electrode 3b of the L element 3. At the same time, electric power is conducted to the contact piece 11 by the contacts 11a and 11b, and then to the other extraction electrode 3a of the EL element 3. This makes EL
Electric power is supplied to the element 3. The EL element 3 emits light when electric power is supplied. The fluorescent plates 6 and 5 emit the light emitted from the EL element 3,
A part of this light is taken in through the through hole portion 2 of the needle main body, and a part of the area facing the through hole portion 2 on the upper surface of the needle emits light. The emission color of the needle upper surface is a mixed color of the emission color of the EL element 3, the color of the fluorescent dye contained in the fluorescent plate 5 and the color of the fluorescent dye contained in the fluorescent plate 6.

Further, the fluorescent plate 6 internally condenses the remaining light emitted from the upper surface of the needle, and the condensed light thus condensed causes the end surface of the needle to emit light due to the color of the fluorescent dye contained therein. A resin having such characteristics is generally called a light collecting resin. Further, the fluorescent plate 5 internally condenses the remaining light emitted from the needle upper surface,
The condensed light thus condensed causes the end face of the needle to emit light due to the color of the fluorescent dye contained therein. The fluorescent plates 5 and 6 emit light of two different colors in two layers.

In addition, if a patterned groove is engraved on the fluorescent plate, the groove portion also emits light, and the decorativeness can be improved. Further, the number of fluorescent plates is not limited to two, and the end faces of the needles can be multicolored by stacking them to form a multilayer.

[Effects] As described above, according to the present invention, a transparent fluorescent plate is provided on the upper surface of the needle body, an electroluminescent element is provided on the lower surface of the needle body, and the needle is located between the electroluminescent element and the fluorescent plate. The body is provided with a through hole for taking in the light emitted by the electroluminescent element to the fluorescent plate, the fluorescent plate is formed in a color different from the emission color of the electroluminescent element, and the light emitted by the electroluminescent element is emitted from the needle body. The light is taken in from the through hole and part of this light is transmitted to allow the top surface of the needle to emit light, and the remaining light is condensed inside to allow the end surface to emit light. A light emitting needle that emits light of a different color from the emitted light from the end face of the needle can be used, and a light emitting needle that is multicolored with one light source is possible.

As for the fluorescent plate, if at least two fluorescent plates are laminated and each fluorescent plate contains fluorescent dyes of different colors,
The end face of the needle can be emitted with light of two or more different colors, and the contour of the needle is displayed in a three-dimensional manner, making it easier to see the needle and changing the emission color of the upper surface corresponding to the through hole. Can be color.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is an enlarged plan view of a light emitting needle, FIG. 2 is a central cross sectional view thereof, and FIG. 3 is a rear view thereof. 1 ... Needle body, 2 ... Through hole portion, 3 ... Electroluminescence element, 4,5, 6 ... Fluorescent plate.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Eiji Hosaka 4-1-1 Taihei Taida, Sumida-ku, Tokyo Inside Seikosha Co., Ltd. (56) Reference JP-A-140687 (JP, A) 55-20432 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A needle main body, a translucent fluorescent plate provided on the upper surface of the needle main body, and an electroluminescent element provided on the lower surface of the needle main body, wherein the electroluminescent element and the fluorescent plate are provided. The needle body located between and is provided with a through hole portion for taking in the light emitted by the electroluminescent element to the fluorescent plate, and the fluorescent plate is a color different from the emission color of the electroluminescent element. And the light emitted by the electroluminescent element is taken in from the through-hole portion of the needle body, a part of this light is transmitted, and the needle upper surface can partially emit light and A luminescent needle that is capable of condensing light inside and emitting light from the end face. 2. The luminescent needle according to claim 1, wherein the fluorescent plate is formed by laminating at least two fluorescent plates, and each fluorescent plate contains a fluorescent dye of a different color.