JP3019768U - Light emitting structure of small lamp - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a small lamp that reduces consumption of dry batteries such as a flashlight, obtains intermediate illuminance for a short time, and displays a location for a long time in the dark. [Structure] A phosphor storage part 5 is provided in a part of or in the vicinity of an inner surface 3 of a reflector 2 to emit stored energy from a lighting surface of the lamp when the lamp 1 is turned off or dimmed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lamp mainly used outdoors such as camping or a power generating lamp for a bicycle.

[0002]

[Prior art]

 It is well known that batteries such as flashlights have a shortened lifespan due to continuous discharge, and it is necessary to occasionally turn them off while using them in order to recover the batteries. However, when it is turned off in the darkness such as outdoors, it becomes dark and it becomes impossible to see even the position of the light. For this reason, the battery may be continuously lit while being aware of the shortened life of the battery. In addition, it is often not necessary to use 100% illuminance of the electric lamp used outdoors, and in this case, energy is wasted. On the other hand, the lamp of a rotary generator such as a bicycle generates a specified amount of power when it rotates at a speed higher than a specified number of revolutions.However, the traveling speed of the bicycle is not constant, and the light from this lamp is emitted at night during low speed traveling. It may be difficult to even see it from a distance, which is dangerous.

[0003]

[Problem to be solved]

 The present invention provides a lamp that accumulates light by utilizing the illumination energy of a lighting lamp and releases the stored energy when the lamp is turned off or when it is in a low illuminance state to obtain an illuminance required for several minutes to several hours. It is a thing.

[0004]

[Means for solving]

This plan uses a phosphorescent material for a part of the reflector of a lamp such as a flashlight or the surrounding light emitting part to obtain temporary illumination even after the light is turned off and to make its location visible for a long time. . A phosphorescent material suitable for the present invention is a phosphorescent material having SrAl ₂ O ₃ as a host crystal (trade name “N night light”), which is excited by light having a wavelength of 250 to 400 mm, and the afterglow has a central wavelength of 520 mm. It emits the light yellowish green light with high brightness and maintains a long decay time. This phosphor has an excitation time of 10 minutes until the saturation reaches 80% when the illuminance of the irradiation light is 200 lx, and an afterglow time until the brightness decreases by 20% is also about 10 minutes. The phosphorescent material pigment can be mixed with a soft synthetic resin to form a tape, dispersed in a binder to form a coating film, or mixed with an acrylic resin or the like to form a molded body.

[0005]

【Example】

 In the figure, 1 is a lamp, 2 is a metal or plastic reflector, 3 is an inner surface, 4 is a reflecting surface, and 5 is a light storing part. The positions of the reflecting surface 4 and the light storing portion 5 on the reflecting surface may be opposite to each other. FIG. 2 shows a case where the reflecting surface 4 and the light storing body portion 5 are provided radially with respect to the lamp 1. Although it is easy to form the phosphorescent part 5 by pasting a tape or a plate-shaped molding on the reflecting surface 4, the entire reflecting plate is molded with a resin containing 5 to 10% by weight of the phosphorescent material, and the inner surface thereof is formed. It is also possible to make a part of the reflective surface. In this case, it is preferable to form a reflective layer on the back surface of the light storage unit. It is not necessary to equalize the total area of the reflecting surface and the total area of the phosphorescent portion, and the area and area ratio may be set according to the application. 3 and 4 show a case in which the luminous body portion 5 is a synthetic resin molded product and is vertically attached along the inner surface of the reflector at an angle of 30 °. By arranging in three dimensions in this way, it is possible to suppress the area reduction of the reflecting surface 4 and increase the volume of the light storing part 5. FIG. 5 shows a case in which the luminous body portion is provided around the lamp. 7 is a cylindrical lamp cover in which the luminous body is mixed in 10% wt acrylic resin, 8 is a transparent plate, and 9 is a battery case. In this case, the lamp cover stores the light reflected by the lamp.

[0006]

【effect】

 In this proposal, when a reflector is provided with a phosphor storage unit, when the lamp is turned off or dimmed, the stored energy is emitted to illuminate. In the case of a camping lamp with a diameter of about 10 cm in the structure shown in Fig. 3, after 10 minutes of lighting, it was hung in the dark at a position 60 cm above the table surface with the reflection surface facing downwards, and a brightness below which you could eat for 6 minutes And an afterglow that is visible for 5 hours or more in the dark. Therefore, even if it is left outdoors, its existence can be easily confirmed. With this model, sufficient illuminance can be obtained for a short time after turning off the light, so afterglow illumination can be obtained and battery consumption can be reduced by repeating blinking at a time interval that is longer than the saturation time of the phosphor. In the case of a bicycle power generation lamp (diameter of about 8 cm), fluorescent light can be seen from a distance of 100 m ahead even if there is no external light, which is useful as a traffic safety measure at night.

[Brief description of drawings]

FIG. 1 is a front view of a reflector.

FIG. 2 is a front view of a reflector.

FIG. 3 is a front view of a reflection plate in which a phosphor is three-dimensionally arranged.

4 is a sectional view taken along line AA of FIG.

FIG. 5 is a cross-sectional view of a main part of a lamp light emitting part.

[Explanation of symbols]

 2 Reflector 4 Reflective surface 5 Luminescent part

Claims (5)

[Scope of utility model registration request] 1. A small lamp using a dry battery or a generator as a power source, wherein a light storage part is provided on a part of a reflector of the lamp. 2. The small lamp according to claim 1, wherein the luminous body portions on the reflecting plate are provided radially at a constant angle interval with the lamp as a center. 3. The small lamp according to claim 1, wherein the luminous body portion on the reflecting plate is formed in an annular shape or a circular shape centering on the lamp. 4. The small lamp according to claim 1, wherein the light storage portion on the reflector of the lamp is a synthetic resin molded product and is erected radially on the inner surface of the reflector. 5. A small lamp using a dry battery or a generator as a power source, wherein a cylindrical cover member for fixing a reflector of the lamp is molded of a translucent synthetic resin containing a phosphor.