JPH0678965U - Projection device for sunrise / sunset in the planetarium - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to project the sunrise and sunset images to a position independent of the projected images of the planetarium body and the Sky Run projection device, and to support tilted domes. [Structure] The light source 3 is provided with a cover 4 which rotates around the light source, and filters 5, 6 are provided on the peripheral side of the cover.
7 and a transparent window 4a are provided, and the light source 3 is provided with a cylindrical light shielding member 2 whose upper end 2a is cut off in conformity with the angle of the parting line of the dome.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The invention relates to a projection device for sunrise and sunset used in a planetarium.

[0002]

[Prior art]

 Projecting the sunrise or sunset along with the skyline during the performance of the planetarium is useful for directing effects.

Conventionally, an apparatus as shown in FIG. 7 has been known as a projection apparatus for this kind of sunrise and sunset. In this device, a lamp 34 serving as a light source is arranged in a case 33, and a transmissive window 33a which forms a projected image of a sunrise (sunset) is provided on the cover (see FIG. 8). On the back side, a color filter 36 that constitutes the color of sunrise (sunset) and frosted glass filters 35 and 37 that cause blurring near the boundary of the projected image are arranged. One planetarium has two components for sunrise and sunset. A stand is intended. FIG. 9 shows a projection image P obtained as a result, by which an effect of the sky near the horizon at sunrise (or at sunset) is produced. In the figure, reference symbol S is a skyline projection image, and 21 is a parting line of the planetarium dome.

As shown in FIG. 6, the above projection device is mounted on a pedestal 31 of the planetarium body 30 or a skyline projection device 32.

[0005]

[Problems to be solved by the device]

 As a result, when the projection images P from the sunrise and sunset projection devices are projected in the B and D directions of the dome 20 shown in FIG. 10, if the projection image P is projected in the A and C directions, As shown in FIG. 11, the planetarium body 30 must be rotated, and if the projection device is mounted above the skyline projection device 32, the skyline projection device 32 must be rotated. Therefore, in the prior art, when the projection device for sunrise / sunset is attached to the pedestal 31 of the planetarium body 30, the projection position of sunrise / sunset cannot be set independently of the star image, and the projection device is the skyline projection device. When mounted on the 32, the projection position of the sunrise / sunset could not be set regardless of the landscape near the horizon, which caused a restriction in the production of the planetarium.

Further, as described above, since the projection device of the prior art can project in only one direction, two projection devices for sunrise and sunset are required, which is an obstacle to miniaturization of the planetarium body.

On the other hand, in the case of a planetarium using an inclined dome, if the conventional projection device for sunrise / sunset is used as it is, the projection image P is positioned at the parting line 21 of the dome 20 as shown in FIG. When projected, an unnecessary projection image PX is projected below the parting line. Therefore, when the projected image P does not fall on the parting line 21 of the dome 20, it is left as it is (state of FIG. 13), and when the projected image P hits the parting line 21 of the dome 20, it is matched with the parting line 21 and unnecessary projection is performed. A means for cutting the image PX is required (state of FIG. 14).

However, as described above, the position of the conventional sunrise / sunset projector changes with the rotation of the planetarium body or the skyline projector, and as a result, the relative position and angle of the light source with respect to the dome also change. The mechanism for realizing the above means becomes extremely complicated, which is an obstacle to downsizing of the projection apparatus and downsizing of the planetarium body.

[0009]

[Means for Solving the Problems]

 The present invention is intended to provide a sunrise / sunset projector that solves the above-mentioned problems of the prior art. That is, the present invention is a sunrise / sunset projection device that obtains a projected image according to the shape of a transmission window by arranging a filter and a transmission window with respect to the light source, and has a configuration in which the transmission window is movable in the entire circumferential direction of the light source. .

[0010]

[Action]

 Therefore, according to the projection device of the present invention, the transmissive window moves in the entire circumferential direction around the light source, so that the movement of the transmissive window enables the projection image to be projected in any direction of the dome. Occurs.

Therefore, the projection image can be freely projected in the sunrise direction and the sunset direction, and the projection of the sunrise and sunset can be realized by one projection device.

On the other hand, the above action means that the projection device does not have to be mounted on the planetarium body or the skyline projection device as in the prior art, and as a result of the projection device being fixed at a fixed position in the dome, The position and angle of the light source with respect to the dome will be fixed. Therefore, if a cylindrical light-shielding member whose upper end is cut off according to the angle of the parting line of the dome is placed in the light source as disclosed in the following examples, a part of the transmission window is below the parting line of the dome. Even in such a case, the irradiation of the parting line and below from the light source itself is blocked, so that an effect of preventing generation of an unnecessary projected image also occurs.

[0013]

【Example】

 1 and 2 are views showing an embodiment of the sunrise / sunset projection device of the present invention. In this embodiment, a cover that rotates around the light source is arranged for the light source, and a filter and a transmission window are provided on the peripheral side of the cover to move the transmission window in the entire circumferential direction of the light source.

In the figure, reference numeral 3 is a lamp that serves as a light source, and is projected on a circular opening 8 provided on the main body 1 of the projection apparatus. Reference numeral 4 in the drawing is a cover. The cover 4 has a shape like an inverted cup and is rotatably fitted in the opening 8 so as to cover the lamp 3. On the peripheral side of the cover 4, a transmissive window 4a (appearing in a semi-circular shape in the drawing) that forms a projected image of sunrise and sunset is arranged by notching the cover. On the back side of the transmission window 4a, a color filter 6 that constitutes the colors of sunrise and sunset is arranged, and on the front and back of this color filter 6, a frosted glass filter for generating blur near the boundary of the projected image. 5 and 7 are arranged.

The cover 4 is rotated by a power mechanism, and here, a gear 10 of a motor 11 arranged in the case 1 is meshed with a gear 9 provided on an outer periphery of a lower end of the cover 4 so as to be desired. It is configured to rotate at an angle.

Next, in this embodiment, the peripheral side of the lamp 3 is covered with the light shielding member 2 so that an unnecessary projected image below the dome parting line is cut in the planetarium using the tilted dome. The light-shielding member 2 has a cylindrical shape, and has a shape in which the upper end 2a is cut off in conformity with the angle θ 2 of the parting line 21 of the dome 20 (see FIGS. 3 and 4).

FIG. 5 is a diagram showing an installation example of the sunrise / sunset projection device of the present invention. The projection device is installed in the dome 20 separately from the planetarium body 30. In this case, it is needless to say that in this case, the cut-off direction of the light shielding member 2 of the projection device and the parting line of the dome must be aligned with each other. Reference symbol P in the drawing denotes a projected image, which is projected in an arbitrary direction of the dome 20 according to the rotation angle of the cover 4 of the projection device.

[0018]

[Effect of device]

 The present invention having the above configuration has the following unique effects. Since it becomes possible to project the sunrise and sunset images at positions that are independent of the projected images of the planetarium body and the Sky Run projection device, the degree of freedom in the production of the planetarium is dramatically improved.

For the same reason as described above, the projection device can be used for purposes other than the production of the sky at sunrise and sunset.

Since the projection image can be projected in any direction of the dome, the projection image can be freely projected in the sunrise direction and the sunset direction with one projection device, and the projection of the sunrise / sunset can be realized with one projection device. it can.

Since the projection device is installed separately from the planetarium body, it contributes to downsizing of the planetarium body.

Since the projection device is fixed at a fixed position in the dome, the position and angle of the light source with respect to the dome are fixed, and the upper end is cut off in conformity with the angle of the parting line of the dome. By disposing the light-shielding member on the light source, it is possible to prevent unnecessary projection of the projected image below the parting line, and it is possible to deal with the inclined dome with a very simple mechanism.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a sunrise / sunset projector according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a side view of an inclined dome.

FIG. 4 is a perspective view showing the relationship between the inclined dome and the sunrise / sunset projector of the present invention.

FIG. 5 is a perspective view showing a usage state of the sunrise / sunset projector according to the present invention.

FIG. 6 is a perspective view of a conventional projection device for sunrise and sunset.

FIG. 7 is a partially cutaway side view of the same as above.

FIG. 8 is a front view of the main part of the same.

FIG. 9 is a front view of a projection image obtained by a conventional projection device for sunrise and sunset.

FIG. 10 is a perspective view showing a conventional use state of a projection device for sunrise and sunset.

FIG. 11 is a perspective view showing a conventional use state of a projection device for sunrise and sunset.

FIG. 12 is a perspective view showing a usage state of a projection device for morning glow and sunset in the related art.

FIG. 13 is a side view showing the relationship between the projected image and the dome.

FIG. 14 is a side view showing the relationship between the projected image and the dome.

[Explanation of symbols]

 2 Light-shielding member 3 Lamp 4 Cover 4a Transmission window 5 Frosted glass filter 6 Color filter 7 Frosted glass filter 20 Dome 21 (Dome) parting line P Projected image

Claims (3)

[Scope of utility model registration request] 1. A sunrise / sunset projection device that obtains a projected image according to the shape of a transmission window by arranging a filter and a transmission window with respect to the light source, wherein the transmission window is movable in the entire circumferential direction of the light source. Projector for sunrise / sunset in the planetarium. 2. The sunrise / sunset projection device for a planetarium according to claim 1, wherein a cover that rotates around the light source is arranged with respect to the light source, and a filter and a transmission window are provided on the peripheral side of the cover. 3. The sunrise / sunset projection device for a planetarium according to claim 1, wherein a cylindrical light-shielding member whose upper end is cut off so as to match the angle of the parting line of the dome is arranged in the light source.