JPS5923394B2 - laser beam clock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser beam timepiece in which a laser beam is rotated at a speed corresponding to the rotational speed of the minute hand, hour hand, second hand, etc. of a watch, so that the laser beam corresponds to the clock hands.

In modern cities, there are many high-rise buildings, some of which have large clocks on their walls for the convenience of the masses.

However, conventional clocks are large-scale contraptions, and their size is naturally limited, especially by the length of the clock hands.

The present invention was made in view of the current situation as described above.
In particular, the aim is to use a small and lightweight clock mechanism to form long clock hands using a laser beam on a vast wall surface of a building or the like.

FIG. 1 is a diagram showing an example of the main parts of the clock mechanism used in the present invention. In the figure, 1 is a laser light source, 2, 3, and 4 are rotating cylinders made of transparent bodies, and 5. ,6
is the beam spiriter, 1γ is the reflection mirror, 8, 9, 10
are bearings such as ball bearings, 11, 12, and 13 are gears provided at the lower end of the rotating cylinder 2°3.4, and 14
is a support that supports these, and the gear 11 is rotated by a constant speed rotating motor (not shown) via the gear 15 at the rotational speed of, for example, the hour hand of a clock, and the gear 12 is rotated via the gear 16. Gear 13 is rotated via gear 17 at a speed corresponding to the minute hand and at a speed corresponding to the second hand.

Laser light from laser light source 1 is transmitted through a beam splitter.
Part L1 is divided by 5, and transparent cylinders 2, 3,
4, and its tip hits the wall of a building and scatters, creating a relatively large dot-like or linear reflected light source, but this reflected light source hits the wall at a speed equivalent to the hour hand of a clock. Rotate.

Also, a part L2 of the light L' that has passed through the beam splitter 5 is split by the beam splitter 6 and projected through the transparent cylinders 3 and 4, and the tip thereof is connected to the reflected light source created by the laser beam L1. creates a reflected light source on the far wall, and this reflected light source rotates on the wall at a speed equivalent to the minute hand of a clock.

Similarly, the laser beam B that has passed through the beam splitter 6 is reflected by the reflecting mirror 7, and the reflected light L3 forms a reflected light source on the wall surface, and this reflected light source is rotated at a rotation speed corresponding to the second hand of a clock. rotate above.

Therefore, it is possible to draw a display corresponding to the hour, minute, and second hands of a clock using a reflected laser light source on the wall surface of a building or the like.

FIG. 2 is a plan view for explaining another embodiment of the present invention. As shown in the figure, luminescent substances or diffusers 18, 19, 20 are coated on the wall surface in an annular manner, and The above-mentioned reflected light source is displayed brighter by causing a light-emitting substance to emit light by the laser light projected as described above, or by scattering the laser light by a diffuser.

Fig. 3 is a side sectional view for explaining another embodiment of the present invention, and Fig. 4 is a plan view thereof. A reflective film or a reflective plate 24 is provided on the outer periphery of the body reflective plates 21, 22, 23 and the outer cylindrical body 4, and the laser beams L1 to L3 projected as described above are repeatedly reflected between these reflective plates. A linear light source is formed, and the clock hands are displayed using the linear light source.

FIG. 5 is a diagram showing another embodiment of the present invention. As shown in the figure, optical elements such as lenses 25, 26, 27 are provided in the laser beam path of each rotary cylinder 2, 3, 4. , the laser beam is diffused to some extent to enlarge the irradiation surface on the wall surface.

FIG. 6 is a diagram showing still another embodiment of the present invention, in which the inclinations of the optical elements 25, 26, 270 shown in FIG. 5 are changed according to the rotation angle of the rotating cylinder, In the illustrated example, cam plates 28, 29, 30 are provided, and the inclination of the optical element is changed by levers 31, 32, 33 that slide on the cam surfaces of these cam plates.

According to this embodiment, by changing the inclination of the optical element, the position where the laser beams L 1 t L2 and L3 hit the wall surface can be changed, so the height of the cam surface can be determined by taking into consideration the shape, size, etc. of the wall surface. Even if the wall surface is horizontally long, vertically long, or elliptical, if you design it in advance,
Even if the wall surface is curved, or even if there are obstacles such as irregularities or windows on the wall surface, the laser beam can be projected onto any position on the wall surface without being affected by the obstacles.

FIG. 7 is an exploded view for explaining a modification of the rotary cylinders 2, 3, and 4, in which a transparent body is used for the path through which the laser beam passes, and other parts may be made of materials other than the transparent body. In the illustrated example, the transparent bodies 3a to 3a are
3o, 4a to 4f.

In this way, the attenuation of the laser beam by the transparent body can be reduced, and each transparent body can be precisely processed, so there is no refraction of the laser beam, and accurate clock display can be obtained. .

In FIG. 7, the rotary cylinders 2, 3, 4 are arranged and used in the same manner as in FIG. 1, and 34 is a transparent cover that covers the entire rotary cylinders.

Above, each embodiment of the present invention has been described using a monochromatic laser beam, but it is also possible to display the clock hands in different colors by using laser beams of multiple colors.
It can be applied not only to walls of buildings, etc., but also to table clocks, wristwatches, etc., and can also be applied to decorative walls, advertising boards, etc. to illuminate them over time. Then, since a part of the decorative mural or advertisement is illuminated while changing from time to time, it is possible to achieve an advertising effect in addition to the clock display function.

Furthermore, it is also possible to use a semiconductor laser as a laser light source and attach the semiconductor laser to each rotary cylinder, thereby omitting the beam splitter 1 reflecting mirror and the like.

[Brief explanation of drawings]

FIG. 1 is a side sectional view for explaining one embodiment of the laser beam timepiece of the present invention, FIG. 2 is a plan view for explaining another embodiment of the present invention, and FIG. 4 is a plan view of FIG. 3, and FIGS. 5 and 6 are side sectional views for explaining other embodiments of the present invention, respectively, FIG. 7 is an exploded view for explaining another embodiment of the present invention. 1... Laser light source, 2, 3, 4... Rotating cylinder, 5.6... Zeam splitter, 7...
...Reflection mirror, 8,9,10...Bearing, 11,12゜13...Gear, 14...
... Support body, 15, 16, 17 ... Gear, 1
8, 19, 20... Luminous body or diffuser, 21.
22, 23, 24...Reflector, 25, 26
. 27... Lens, 28, 29, 30...
・Cam, 31. 32, 33... Lever, 34.
·····cover.

Claims (1)

[Claims] 1. A plurality of transparent cylindrical bodies disposed coaxially, and a beam spiriter provided at an angle at the top of the inner cylindrical body.
a reflective mirror provided at an angle at the top of the outer cylindrical body, and a laser beam source emitted through the central axis of the cylindrical body, each of the cylindrical bodies being rotated with a predetermined rotation ratio relationship; A laser beam timepiece characterized in that the laser beam reflected by the beam spiriter and the reflecting mirror is configured to form clock hands. 2. It has two cylindrical bodies, and the inclination angle of the beam spiriter provided at the top of the inner cylindrical body is larger than the inclination angle of the reflection mirror provided on the outer cylindrical body, and 2. The laser beam timepiece according to claim 1, wherein the outer cylindrical body is rotated at a speed corresponding to the hour hand, and the outer cylindrical body is rotated at a speed corresponding to the minute hand. 3 It has three cylindrical bodies, and the inclination angle of the beam spiriter provided at the top of the inner cylindrical body is thicker than the inclination angle of the beam spiriter provided at the top of the intermediate cylindrical body. The angle of inclination of the reflecting mirror provided at the top of the body is configured to be smaller than the angle of inclination of the beam spiriter of the intermediate cylindrical body, and the inner cylindrical body is rotated at a speed corresponding to the hour hand. 4. The laser beam timepiece according to claim 1, wherein the cylindrical body is rotated at a speed corresponding to a minute hand, and the outer cylindrical body is rotated at a speed corresponding to a second hand. The circumferential wall of the cylindrical body is provided with an optical element for diffusing the laser beam at a position through which the laser beam reflected by the beam spiriter or reflecting mirror provided at the top of each cylinder passes. The laser beam timepiece according to any one of claims 1 to 3. 5. The optical element is configured so that its inclination is changed according to the rotation angle of the cylindrical body. A laser beam timepiece according to claim 4, characterized in that: 6 a plurality of transparent cylindrical bodies disposed coaxially, and a beam spiriter provided at an angle at the top of the inner cylindrical body; −
a reflective mirror provided at an angle on the top of the outermost cylindrical body, and a laser beam source emitted through the central axis of the cylindrical body, and each of the cylindrical bodies is rotated with a predetermined rotation ratio relationship. , in a laser beam clock configured such that the laser beam reflected by the beam spiriter and the reflecting mirror forms clock hands, the laser beam emitted from each cylindrical body is reflected to the outside of the cylindrical body. A reflecting mirror tube is provided corresponding to each of the cylindrical bodies, and a common opposing reflector is provided between the cylindrical body and the reflecting mirror tube, facing the total reflection mirror tube, and facing each reflecting mirror tube. A laser beam clock characterized in that a laser beam is repeatedly reflected between a reflector and a reflector. 7 a plurality of cylindrical bodies disposed coaxially, a beam spiriter provided obliquely on the top of the inner cylindrical body, a reflection mirror provided obliquely on the top of the outermost cylindrical body; a laser beam source emitted through the central axis of a cylindrical body, each of the cylindrical bodies is rotated with a predetermined rotation ratio relationship, and the laser beam reflected by the beam spiriter and the reflecting mirror forms clock hands. In a laser beam timepiece configured to:
Only the portion through which the laser beam reflected by the beam spiriter and reflection mirror passes is made of a transparent body,
A laser beam clock characterized in that the rest is composed of an opaque body. 8 It has three cylindrical bodies, the innermost cylindrical body is made of an opaque body, and the middle cylindrical body is a transparent body through which the laser beam is reflected by the beam spiriter of the innermost cylindrical body. The outermost cylindrical body has a transparent body part on its peripheral wall for passing the laser beam reflected by the beam spiriter of the innermost cylindrical body and the intermediate cylindrical body. A laser beam timepiece according to claim 7, characterized in that: