JPH08700Y2 - Constellation observer - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention relates to a constellation observer for teaching materials used by children of lower grades.

[0002]

2. Description of the Related Art Conventionally, a box body having a partition plate for partitioning an upper chamber and a lower chamber into which a circular hole is formed in the center of the partition plate and a viewing window formed on one side of the upper chamber, and a partition plate of the box body are mounted. A hemispherical sphere that has a locking collar to be placed at the opening edge and fits in the central circular hole of the partition plate and projects a constellation on the inner surface protruding into the lower chamber of the box, and the bottom of this sphere. A constellation observer disclosed in Japanese Examined Patent Publication No. 56-26032 is equipped with a projection lamp that illuminates an exposed portion of the room from below and a concave mirror that allows the projection constellation of the celestial sphere to be seen from the position of the viewing window. There is.

[0003]

In the conventional constellation observer, the whole constellation can be seen by staring at the actual night sky by projecting the constellation on the inner surface of the celestial sphere into a concave mirror. Since it is a hemisphere that is convexly curved to,
Since the constellation must be displayed on the inner surface of this celestial sphere, its processing is difficult, and since the celestial sphere is installed inside the box, a concave mirror for viewing the constellation on the inner surface of this celestial sphere is also required. However, there is a problem that the product cost becomes high.

The present invention has been devised in order to solve the above-mentioned conventional problems, and its purpose is to easily observe the astronomical constellation and the dome projection constellation for comparison, and also to observe the dome projection constellation. The purpose of the invention is to provide a constellation observer with a simple structure and low product cost.

[0005]

In order to achieve the above object, the constellation observer of the present invention has an elliptical eccentric light transmitting hole 12.
A frame 10 having an asterisk, a constellation plate 15 of the all-sky constellation that is rotatably held by the frame and is capable of transmitting lamp light, and a projection lamp 3 that illuminates an exposed portion of the translucent hole of the constellation plate from below And the projected constellation 15 of the constellation plate 15
a constellation projection dome 18 formed of a milky white translucent material in which a is reflected and fixed on the frame 10 so as to cover an upper portion of the constellation plate 15;
It is characterized in that the upper portion 5a is projected through the eccentric light-transmitting hole 12 as a concave curved surface 19 having a spherical shape with a predetermined radius.

[0006]

When the upper part of the constellation plate projection constellation 15a of the constellation projection dome 18 is formed as a concave curved surface 19 which is recessed into a spherical shape, the projection constellation 15a shown in the dome 18 and the constellation of the astronomical object seen in the night sky are compared. When observing, both the dome side and the night sky side looking at the astronomical constellation are concavely curved.
Since the projection constellation 15a reflected on the concave curved surface of 8 and the constellation of the celestial body seen in the night sky have the same shape, it is easy to compare the astronomical constellation and the dome projection constellation, and when observing the dome projection constellation. Also becomes easier to see.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 is a base made of synthetic resin having a projection lamp 3 which is turned on by a battery 2. The base 1 is a battery housing portion 4 in which a battery 2 is loaded, and a lamp hood having an upper opening for covering the lamp 3. 5 and a switch 6 for opening and closing the lamp lighting circuit, and a pillar fitting projection 7 is integrally provided on the upper surface portion located on the lamp 3 side.

Numeral 8 is a stanchion which is erected on the base 1 by fitting the lower end opening to the stanchion fitting projection 7, and the stanchion 8 has an elliptic cylindrical shape, and the frame 10 is provided at the upper end thereof. Are fitted and held in a horizontal state.

The frame 10 is a disc-shaped synthetic resin integrally molded product, and has a shallow circular recess 11 and an oval eccentric light-transmitting hole 12 penetrating the bottom wall of the recess. A column fitting protrusion 13 that is press-fitted into the upper end opening of the column 8 is provided, and a time scale at night (from 6 pm to 6 am) is provided on the outer peripheral portion of the upper surface along the outer edge of the recess 11. 14 is displayed as shown in FIG.

Numeral 15 is a constellation plate of all the constellations which can transmit the lamp light. This constellation plate 15 is a transparent circular sheet on which a blue coating film is formed so that all the constellations are white.
On the outer peripheral portion, a month / day scale 16 for one year is equally displayed as shown in FIG. 2, and is fitted into the circular recess 11 of the frame 10 so as to be pivotally operable at the position of the frame cutout portion 10a. It is held by the locking claw 17 so as not to come off.
The exposed portion of the translucent hole of the constellation plate 15 is illuminated from below by the illumination light R directed obliquely upward of the lamp 3, as shown in FIG.

Reference numeral 18 denotes a constellation projection dome fixed on the frame 10 by projection fitting so as to cover the upper portion of the constellation board 15. The constellation projection dome 18 is a milky white image of the projection constellation 15a of the constellation board 15. Although it is formed of a light-transmitting material (plastic in the embodiment), in the present invention, the upper part of the dome 18 where the constellation projected on the constellation plate 15a (constellation projected through the eccentric light-transmitting hole 12) is shown is predetermined. Radius eg 8
It is formed as a concave curved surface 19 as shown in FIG.

[0012]

According to the constellation observing device of the present invention, the constellation of the constellation plate 15 is formed as a concave curved surface 19 which is spherically recessed with a predetermined radius in the upper portion of the dome where the constellation is projected through the eccentric light transmitting hole 12. Therefore, when the projected constellation 15a reflected in the dome 18 and the constellation of the celestial body seen in the night sky are observed in contrast, both the dome side and the night sky side looking at the astronomical constellation are concavely curved and are reflected on the concave curved surface 19 of the dome. The projected constellation 15a and the constellation of the celestial body seen in the night sky have the same shape. Therefore, it is possible to easily observe the astronomical constellation and the dome projection constellation in a comparative manner, and it is also easy to see the dome projection constellation.

Moreover, the constellation observer of the present invention is the constellation plate 1
Since the constellation No. 5 is projected onto the concave curved surface 19 above the dome through the eccentric light transmitting hole 12 of the frame 10, it is not necessary to represent the constellation on the inner surface of the dome 18 like a conventional celestial sphere. Also, the dome 18 can be easily molded from a transparent plastic or the like.

Further, since the dome 18 is fixed on the frame 10 so as to cover the upper part of the constellation plate, the conventional concave mirror for viewing the constellation becomes unnecessary, and a constellation observing device with a low product cost can be obtained. Can be provided.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing a constellation observing device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 seen from above.

[Explanation of symbols]

1 ... Base, 2 ... Battery, 3 ... Projection lamp, 6 ... Switch,
8 ... Posts, 10 ... Frame, 12 ... Eccentric transparent holes, 14 ...
Time scale, 15 ... Constellation board, 15a ... Constellation board projection constellation, 1
6 ... Moon scale, 18 ... Constellation projection dome, 19 ... Concave curved surface.

Claims (1)

[Scope of utility model registration request] 1. A frame having an oval eccentric light-transmitting hole, a constellation plate of the constellation of all the constellations, which is rotatably held by the frame and can transmit lamp light, and a light-transmitting hole of the constellation plate. A projection lamp that illuminates the exposed portion from below, and a constellation projection dome that is formed of a milky white translucent material that shows the projected constellation of the constellation plate and is fixed on the frame so as to cover the constellation plate upper part, A constellation observer characterized in that the constellation plate constellation of this dome is formed as a concave curved surface that is recessed into a spherical shape with a predetermined radius at the upper portion projected through the eccentric transparent hole.