Optics: image projectors – Gun – flashlight or battery operated type
Reexamination Certificate
2001-02-20
2003-09-23
Adams, Russell (Department: 2851)
Optics: image projectors
Gun, flashlight or battery operated type
C353S097000, C353S101000
Reexamination Certificate
active
06623124
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a portable projection type illuminating device that is utilized as an illuminating apparatus such as a flashlight, or an advertising illumination, or a projecting apparatus such as a projecting toy, and can project and form a silhouette, a character, a pattern or the like of a clear given shape on a projecting position.
2. Description of the Prior Art
Previously, for this type of projection type illuminating device, for example, there has been a device having a filter in which a light transmitting opening part with a shape of an arrow or the like is opened and formed, arranged at the front part of the light beam emitting hole of a laser device, so that the light beam of the laser device may be radiated from the rear of this filter to display the arrow at a given projecting position in the front.
BRIEF SUMMARY OF THE INVENTION
Object of the Invention
However, in such a previously projection type illuminating device, in the case where the arrow projected by a light beam with a strong directivity of the laser device carelessly enters an eye of a person, there is a probability of damaging the eye since the optical intensity emitted in a state of being converged by the laser device is very high. Furthermore, the light source of the laser device has a monochromatic wavelength, and therefore, around the projected arrow, an unnecessary diffraction phenomenon may be caused, or interference fringes may be generated, and there has been such a problem that the shape of the arrow cannot clearly be projected.
Furthermore, aside from this, by Japanese Patent Laid-Open No. 2-192601, a flashlight with a liquid crystal watch is proposed, and this flashlight is a device that projects, for example, the display of time by using liquid crystal display, by providing an optical lens for projecting the liquid crystal display arranged in front of the lamp containing a light source at the front of the light source. However, in the case of such a device with a liquid crystal display structure, it is necessary to arrange a liquid crystal display body in the projecting light, and therefore, not only the structure becomes complex but also the cost becomes extremely high, and such a complex and expensive device is not suitable for being used in, for example, a flashlight type portable projecting device used as a toy.
Therefore, this invention is made in view of the above described previously existing various situations, and it is an object to provide a portable projection type illuminating device which can safely be used without damaging an eye even when the light carelessly enters the eye of a person, and further, which can easily realize and form a silhouette, a pattern or the like with a clear given shape on the projecting position by lighting a light source such as an electric lamp, and furthermore, which can widely be used as a projecting apparatus such as a projecting toy besides an illuminating apparatus such as a flashlight or an advertising illumination, and additionally, which has a simple structure and can be provided at a low cost.
SUMMARY OF THE INVENTION
In order to solve the above described problems, this invention is a projection type illuminating device
1
, which comprises an illuminator main body
10
for performing radiation by a light source
13
, and a mask part
30
removably attached to the tip of the illuminator main body
10
and having a shading plate
31
in which projecting opening parts
32
of various forms are opened and formed, at the end part, in which the opening part shape of the projecting opening part
32
is projected as it is illuminated from the back with the light radiated by the illuminator main body
10
and passing through the projecting opening part
32
of the mask part
30
,
Furthermore, it is a projection type illuminating device
1
, which comprises an illuminator main body
10
for performing radiation by a light source
13
, and a mask part
35
removably attached to the tip of the illuminator main body
10
and having a shading plate
36
in which translucent projecting plate
37
having various figures such as a symbol or a pattern displayed thereon are arranged, at the end part, in which the various figures on the projecting plate
37
are projected as they are illuminated from the back with the light radiated by the illuminator main body
10
and passing through the projecting plate
37
of the mask part
35
.
Still furthermore, it is a device comprising the above described illuminator main body
10
, and mask parts
30
,
35
, and further comprising a focus adjusting lens barrel part
40
, in which this focus adjusting lens barrel part
40
is movably attached to the above described mask parts
30
,
35
in a state of covering the mask parts
30
,
35
, and the opening part shape of the projecting opening part
32
is projected as it is by focusing the light radiated by the illuminator main body
10
and passing through the projecting opening part
32
of the mask part
30
by using the focus adjusting lens barrel part
40
, or the various figures on the projecting plate
37
are projected as they are by focusing the light passing through the projecting plate
37
by using the focus adjusting lens barrel part
40
.
In addition, the focus adjusting lens barrel part
40
has a screw type structure so that it may move back and forth by being screw-rotated to the mask parts
30
,
35
, or has a click type structure so that it may move back and forth while being sequentially stopped to the mask parts
30
,
35
.
Furthermore, a condenser lens barrel part
20
is removably attached to the tip of the illuminator main body
10
, and it can be configured that the light radiated by the illuminator main body
10
and passing through the shading plates
31
,
36
of the mask parts
30
,
35
is focused by the condenser lens barrel part
20
and the focus adjusting lens barrel part
40
.
In the projection type illuminating device
1
according to this invention with the above described structure, the light radiated by the illuminator main body
10
performing radiation with the light source
13
and passing through the projecting opening part
32
of the mask part
30
clearly projects the light flux of the opening part shape of the projecting opening part
32
, and similarly, the light passing through the projecting plate
37
of the mask part
35
projects the various figures displayed on the projecting plate
37
as they are, and it clearly forms silhouettes, patterns, and others on arbitrary projecting positions.
The focus adjusting lens barrel part
40
movably attached to the mask parts
30
,
35
images the opening part shape of the projecting opening part
32
to be projected, the displayed figure or the like at an arbitrary projecting position by a back-illumination due to the light radiated by the illuminator main body
10
and passing through the projecting opening part
32
and the projecting plate
37
of each of the shading plates
31
,
36
of the mask parts
30
,
35
.
The focus adjusting lens barrel part
40
with a screw type structure moves the focus adjusting lens barrel part
40
back and forth, for example, with a given screw pitch by being screw-rotated to the condenser lens barrel part
20
. Furthermore, the focus adjusting lens barrel part
40
with a click type structure moves the focus adjusting lens barrel part
40
back and forth while being sequentially stopped to the condenser lens barrel part
20
.
REFERENCES:
patent: 1640694 (1927-08-01), Deming
patent: 2090086 (1937-08-01), Weiner
patent: 2478336 (1949-08-01), Stein et al.
patent: 2764058 (1956-09-01), Ellis
patent: 3078761 (1963-02-01), Zorn
patent: 3183773 (1965-05-01), Weinstein
patent: 4396262 (1983-08-01), Laizans et al.
patent: 5233375 (1993-08-01), Williams et al.
patent: 02192601 (1990-07-01), None
patent: 3029927 (1996-07-01), None
Adams Russell
Esplin D. Ben
Hal Corporation
Merchant & Gould P.C.
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