JPH05288865A - Hand for wall clock - Google Patents

Abstract

PURPOSE:To generated a sufficient display luminance of electronic clock hands according to external light by constituting the hands by forming a protrusion and a recessed groove in the direction of the width of the hands and a rising side edge at the peripheral edge of the hands in one piece by a transparent resin where a fluorescent substance is mixed. CONSTITUTION:Hands 11 are in wave shape in the direction of plane width of the hands 11 by a transparent resin which is mixed by a fluorescent substance (colored or colorless fluorescent dye or fluorescent pigment) and allow a plurality of protrusions 12 and recessed grooves 13 which are extended in axial direction of the hands 11 to be formed and then a reflection layer 15 according, to for example, a white reflective paint to be formed on the rear surface of the protrusions 12 and the recessed grooves 13. When external light enters from the rear surface of the hands 11, fluorescence results due to reflection of the fluorescent substance within the hands 11 and one part of the fluorescence is reflected by a reflection layer 15 and then is discharged to the surface of the hands 11 while being reflected within the hands 11. Other parts of the fluorescence are discharged with a high luminance from a rising edge 16 of the hands 11 while being totally reflected within the hands 11. This structure achieves the hands 11 with a high luminance according to external light.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer structure for a wall clock, which is particularly suitable for hanging on a ceiling of a station building, a platform or the like.

[0002]

2. Description of the Related Art A general wall clock suspended on, for example, a platform in a station yard allows its clock display to be viewed at any time of the day or night. For example, as shown in FIG. 1 is composed of a plate material capable of transmitting light, and a lighting device 2 for transmitting and illuminating the dial plate is installed on the back side of the dial plate 1, and in the daytime, a watch using the dial plate and the hands 3 is provided. The display, that is, the time, is visually checked by the reflected light from outside light, and at night,
The lighting equipment installed inside the timepiece is turned on, and the dial is transmitted and illuminated by the lighting from the lighting equipment 2 so that the time can be recognized.

Reference numeral 4 is a clock movement, and 5 is a display board 1.
And a transparent watch cover located in front of the hands 3.

[0004]

However, in the wall clock having such a conventional structure, it is necessary to equip the timepiece with a lighting device for transmitting and illuminating the dial 1 and the pointer 3 at night. Therefore, not only the timepiece body is upsized, but also a power supply facility for operating the lighting fixture is required, which causes a problem that the facility cost increases. Furthermore, there is a problem in that the illumination bulb is cut off due to long-term use of the timepiece and must be replaced with a new illumination bulb each time, which causes trouble and troublesomeness in the replacement work.

Further, in the conventional timepiece, it is difficult to confirm the time display when the internal lighting is delayed even though the amount of extraneous light is insufficient, such as at dusk. There was a point.

[0006]

The present invention has been made by paying attention to the above-mentioned conventional problems, and in particular, the pointer for displaying the time has a structure capable of generating sufficient brightness by external light, An object of the present invention is to provide a timepiece pointer that can increase display brightness by external light without using a lighting device inside the timepiece mechanism.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. In the present invention, however, the structure of the pointer has a feature, and other timepiece constituent members, that is, a timepiece movement, a dial plate. As the constituent members such as the transparent cover, those of the conventional example can be used as they are.

That is, the pointer 11 shown in FIGS. 2 and 3.
Is uneven in the plane width direction of the pointer 11, and a plurality of elongated protrusions 12 and concave grooves 13 are formed in the longitudinal direction thereof. The material of the pointer 11 is a transparent or colored transparent material in which a fluorescent substance 14 which is a colored or colorless fluorescent dye or fluorescent pigment is mixed with a transparent resin such as acrylic, polycarbonate, styrene, vinyl chloride or the like. Further, a reflective layer 15 made of, for example, white reflective paint is formed along the longitudinal direction on the back surface of the pointer having the above-described shape, that is, the back surfaces of the protrusion 12 and the concave groove 13. Reference numeral 16 indicates a rising edge of the pointer, and 17 indicates a mounting hole for the pointer shaft.

As described above, the structure of the pointer 11 according to the present embodiment is formed by the transparent resin mixed with the fluorescent substance 14, which is wavy in the plane width direction of the pointer and extends in the axial direction of the pointer 1.
2 and the concave groove 13 are formed, and on the back surface (lower surface) of the ridge 12 and the concave groove 13, a reflective layer 15 made of a reflective paint
The surface of the pointer 11 (flat)
When external light is further incident, the fluorescent material 14 in the pointer 11 causes the fluorescent material 14 to reflect the fluorescent light. Is emitted. The other part of the fluorescence is emitted with high brightness from the rising edge 16 of the pointer 11 while totally reflecting inside the pointer 11.

Therefore, according to the pointer 11 structure of the present embodiment,
When the pointer receives external light, fluorescence is generated by the fluorescent substance 14 inside the pointer 11, and is further reflected by a plurality of reflection layers 15 provided on the back surface of the pointer 11 and emitted toward the surface of the pointer 11. Therefore, the entire surface of the pointer 11 is reflected and displayed with high brightness. Therefore, according to this pointer structure, it is possible to obtain a pointer that emits high brightness without installing a lighting means. For example, in a wall clock that uses this pointer, equipment cost reduction, electrical energy saving, etc. Economic efficiency is improved. Further, since the surface width direction of the pointer is formed in a corrugated shape and the peripheral portion of the pointer is formed as a rising piece, the rigidity of the pointer is increased and the bending and deformation of the pointer can be effectively avoided. .

[0011]

As described above, according to the present invention, the ridge 12 and the concave groove 1 are formed in the pointer width direction by the transparent resin mixed with the fluorescent substance 14.
Since 3 is alternately formed and the rising edge 16 is integrally formed on the peripheral edge of the pointer, according to this, it is possible to obtain a pointer that emits high brightness without providing lighting means. In the wall clock that uses the pointer, the economical efficiency can be improved by reducing the facility cost and saving the electric energy. Further, the surface width direction of the pointer is formed in a wave shape, and the peripheral portion of the pointer is formed as a rising upright piece, so that the rigidity of the pointer is increased,
The effect that the bending and deformation of the pointer can be effectively avoided is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view of a conventional example timepiece.

FIG. 2 is a perspective view of a pointer according to an embodiment of the present invention.

3 is an enlarged cross-sectional view taken along the line AA in FIG.

FIG. 4 is an explanatory diagram of a pointer light guide action according to the embodiment of the present invention.

[Explanation of symbols]

 11 ... Pointer 12 ... Projection 13 ... Recessed groove 14 ... Fluorescent substance 15 ... Reflective layer 16 ... Rising edge 17 ... Mounting hole

Claims (1)

[Claims] 1. A ridge (12) and a groove (13) are alternately formed in the pointer width direction by a transparent resin mixed with a fluorescent substance (14), and a rising edge (16) is integrally formed on the peripheral edge of the pointer. A pointer for a wall clock that is characterized by that.