Novel lunar phase demonstration disc

Abstract

A novel lunar phase demonstration disc is used for observing lunar phase change in a month, approximately which side is bright, moon apparent motion in a day, positions of the moon in the sky at night and day, and the like. The two faces of the disc are marked with 18-6 o'clock at night and 6-18 o'clock at daytime respectively and used for indicating the time between 18-6 o'clock at night and 6-18 o'clock at daytime, the demonstration disc is overturned by 180 degrees along the horizontal shaft, and the moon at night and the moon at daytime can be conveniently switched and observed. The device is simple to manufacture, low in cost, simple to operate, convenient to use, capable of being fused with the environment and strong in environment substitution feeling during observation.

Description

Technical Field

[0001] It belongs to the subject of geography and is related to the demonstration of celestial movement. Background Art

[0002] The existing technology for demonstrating the changes in the moon phases and positions within a month, the approximate bright side, the apparent motion of the moon within a day, the position of the moon in the sky at night and during the day, etc., has many shortcomings. Using computer simulation to demonstrate the changes in the moon phases is difficult to correspond to the actual scene. Without the computer, facing the moon in the sky again, one is often confused. The viewing angle of three-dimensional demonstrators is difficult to be realistic. Most of them are observed from the perspective of an observer outside the earth, and a few are viewed from the perspective of an observer on earth. However, the demonstrators are difficult to move and expensive. Without the demonstrators, it is also difficult to correspond to the moon in the sky. In the existing technology, some chuck-type demonstrators are similar to a wall chart and lack a sense of dynamics, or the orientation is reversed and does not correspond to reality, or the patterns are complicated and do not highlight the main subject, and cannot effectively demonstrate the phases of the moon and the changes in movement.

[0003] The present invention improves upon the above-mentioned defects, is simple to manufacture, low in cost, simple to operate, easy to use, can be integrated with the environment, and provides a strong sense of environmental immersion during observation. Summary of the Invention

[0004] The new moon phase demonstration disk is used to observe the changes in the moon phase within a month, which side is brightest, the apparent motion of the moon within a day, and the position of the moon in the sky at night and during the day. Figure 1 The total effect at night, Figure 2 The two sides of the disk are marked with 6:00 PM to 6:00 PM and 6:00 PM to 6:00 PM respectively, which are used to indicate the time between 6:00 PM to 6:00 PM and 6:00 PM to 18:00 PM during the day. By flipping the demonstration disk 180 degrees along the horizontal axis, you can easily switch between observing the moon at night and during the day.

[0005] The new moon phase demonstration disc is composed of 7 pieces. Figure 3 It is a schematic diagram of the overall hierarchical arrangement of the relative positions of each component.

[0006] Figure 8 The circular discs, identical to the date selector discs 1 and 7, are used for selecting the date on the outermost sides, respectively. The date (or moon phase) is selected through the openings in the discs, and the position of the moon in the sky throughout the day, as well as its phases and apparent motion, are observed through the openings. Two symmetrical protrusions are located below the date selector discs 1 and 7, which align with the recesses on the moon phase pattern discs 3 and 5 to enhance the feel during adjustment and also increase the friction between 1 and 3, and between 7 and 5, for easier adjustment and synchronization.

[0007] Figure 9Half-discs 2 and 6 are the moon phase obscuration plates, consisting of a thin disk with a partially thickened area. They are identical in shape and are fixed to either side of the time square 4. The shaded area is the thickened area. The shape of these thickened areas is not strictly required; they should provide ample space for the rotation of the moon phase discs 5 and 3. The thickened area is slightly thicker than that of 5 or 3, allowing them to rotate smoothly beneath the thin obscuration plates raised by the thickened areas. The thin obscuration plates obscure the lower halves of the night and day moon phases, obscuring the moon phases that are currently unseen. The obscuration plates are thinner, with the perimeter thickened to slightly greater than the thickness of the moon phase discs 3 or 5, ensuring a smooth, even surface and allowing the two discs to rotate smoothly.

[0008] Discs 3 and 5 are moon phase pattern discs. Figure 6 It is the moon phase pattern disk 5 night side, Figure 7 On the daytime side of the moon phase disc 3, the central axes of the two discs are yin-yang, allowing them to be inserted and locked into each other, ensuring that the moon phase discs 3 and 5 always rotate synchronously. The "15th" and "30th" on the two discs are aligned, respectively, and secured back to back using a yin-yang plug-in mechanism. The two discs share the same moon phase design, differing only in the placement of the "current time" mark: at night, the "current time" mark is at the "15th," while during the day, it is at the "30th." The moon phases are arranged sequentially from the first to the 30th of the lunar month. The seventh and eighth days combine to represent the "first quarter moon," still occupying two positions. Similarly, the twenty-second and twenty-third days combine to represent the "last quarter moon," also occupying two positions. Due to the variation in the number of months, the full moon and the dark moon are not fixed for each month and may vary by a day, making the indications only approximate. The first day of the lunar month is the "new moon," when the moon is generally not visible, though a faint crescent may be visible in the west. The moon phases are indicated by dotted lines. Small grooves (pits) are set under the moon phase pattern discs 3 and 5, which align with the protrusions of the date selection discs 1 and 7, so that the moon phase pattern disc and the date selection discs 3, 5, 1, and 7 can rotate synchronously after the date is selected.

[0009] The time square 4 shows the time of day and the geographical east-west direction. Figure 4 The night time side shows 18:00-6:00, with "East" and "West" marked on the left and right sides respectively. The daytime is marked on the lower half of the back of "Night". Figure 5 The daytime display shows 6-18 o'clock, with "East" and "West" marked on the left and right sides respectively. By flipping the time block 4 180 degrees along the horizontal axis, you can easily switch between observing night and day time. The center of the time block 4 has a hole, which is slightly larger than the outer axis of the center of the moon phase pattern disks 3 and 5 to ensure that the moon phase pattern disks 3 and 5 can rotate freely.

[0010] The screw passes through the moon phase pattern disk, the time length square and the date selection disks 1, 3, 4, 5 and 7. A spring under the nut always maintains appropriate pressure on the disk to ensure that the date selection disks 1 and 7 can be easily rotated. After releasing the hand after selecting the date, the date selection disks 1 and 7 can continue to rotate synchronously with the moon phase pattern disks 3 and 5 under the appropriate pressure of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall effect of the new moon phase disc at night after assembly. 4 is the long time square, currently showing the night side, 5 is the night side of the moon phase disc pattern, 7 is the date selector disc with a viewing opening, and 6 is the moon phase cover. The thin disc surface of the moon phase cover is below the date selector disc and located on the upper surface of the moon phase disc, covering the currently invisible moon phase; Figure 2 This is the total effect during the day after the new moon phase disk is assembled. Figure 1 The same, only the text and patterns are on the day side; Figure 3 This is a schematic diagram of the relative positions of the various discs of the new moon phase disc. 1 and 7 are the outermost date selector discs, 2 and 6 are the moon phase shields, 3 and 5 are the day and night sides of the moon phase pattern disc, and 4 is the long time square, with the two sides displaying 6 to 18 o'clock and 18 to 6 o'clock respectively; Figure 4 It is the night side of the new moon phase disk time long square 4; Figure 5 It is the day side of the new moon phase disc time long block 4; Figure 6 It is the moon phase pattern disk 5 night side, Figure 7 It is the daytime side of the moon phase pattern disk 3; Figure 8 The date selectors 1 and 7 are of the same shape, and the time and moon phase are selected and viewed through the viewing opening; Figure 9 These are the moon phase shielding pieces 2 and 6. The moon phase shielding pieces 2 and 6 have the same shape. The shaded part is the thickened area. The shape of the thickened area is not strictly required. They are glued to both sides of the time long square of 4 through the thickened area, and enough space should be left for the moon phase pattern disks 5 and 3 to rotate in a circle.

[0012] Implementation example

[0013] For ease of production, except for the thickened area of ​​the shielding plate which is slightly thicker than 3mm and has a thin plate with sufficient strength on top, the thickness of all other plates is 3mm.

[0014] The rectangular block 4 indicating the time can be made of a material such as a plastic plate with a length of not less than 300 mm and a width of not less than 240 mm and a slightly higher strength. On both sides, 18:00-6:00 at night and 6:00-18:00 during the day are marked outside a semicircle with a diameter of 200 mm. A circular hole with a diameter of 20.4 mm is opened in the middle of the time rectangular block to facilitate the free rotation of the moon phase disk.

[0015] The moon phase discs 3 and 5 share the same design, displaying the monthly date and corresponding moon phase. Note the different "Current Time" markings on the two discs. With an outer diameter of 194mm, the design and date are enclosed within a 106mm diameter circle. A small recess (pit) is located on the inner side of the circle, corresponding to the date, to facilitate positioning of the date selector. The inner shafts of the two discs are designed as a yin-yang interlocking structure, ensuring a 3.2mm gap between the inner surfaces of the two discs—slightly larger than the thickness of the time blocks—to ensure easy, synchronized rotation. The inner shaft has an outer diameter of 20mm, corresponding to the opening in the center of the time blocks, and a slightly smaller outer diameter.

[0016] The moon phase shields 2 and 6 have a semicircular interior with a diameter of about 140mm. They do not affect date selection and can only block the moon phase diagram. The shielding disc is thinner and the periphery is thickened to be slightly larger than the thickness of the moon phase pattern disc 3 or 5 to ensure that it is flat and the moon phase pattern discs 3 and 5 can rotate smoothly.

[0017] The date selection disc 1 is the same as 7, with a diameter of 178mm. A small window corresponding to the date and month is opened near the outer circle for selecting the date and viewing the moon phase.

[0018] For the final assembly, you can use a screw with a diameter of about 4mm to pass through the moon phase pattern disk, the time long square and the date selection disks 1, 3, 4, 5, and 7. Add a spring under the nut to always maintain appropriate pressure on the disk.

[0019] Directions:

[0020] First, select the date to be demonstrated: turn the date selection discs 1 and 7 respectively so that the openings are aligned with the desired date, with both selection discs facing the same date.

[0021] Next, select the time of day you want to display: rotate the moon phase dial 5 or 3 (date selector dials 1 and 7 automatically rotate together) to position the "current time" at the desired time of day. Holding the display facing due south, the left side naturally represents east and the right side represents west, creating spatial correspondence for easier understanding.

[0022] Demonstration 1: The moon's position and phases throughout the day. You can first demonstrate the moon's movement at night. Turn to the "night" side, where the date selection dial can no longer be adjusted. Turn the moon phase pattern dial 3 or 5, and face the "current time" to 18:00. Slowly turn the moon phase pattern dial to observe the moon's position and movement, and also see which side of the moon is brightest. Turn the "current time" to 6:00 dawn, which is already daytime, and flip the moon phase demonstration dial 180 degrees along the horizontal axis to view the daytime situation. Slowly turn the moon phase pattern dial in the same way to observe the moon's movement on the "daytime" side.

[0023] Demonstration 2: Watch the moon's position change at the same time on the next day. Keep the time indicated by the moon phase pattern dial unchanged, just adjust the "date selection dial" to the next day and watch the moon's position change.

Claims

1. A new type of moon phase demonstration disc, characterized by: The main body is composed of four parts: a time block (4) for displaying a day, two moon phase pattern discs (3, 5) for displaying a moon phase pattern, two moon phase shielding discs (2, 6), and two date selection discs (1, 7). The two moon phase shielding discs (2, 6) are respectively fixed on both sides of the time block (4) to shield the moon phase that is not visible at the current time. The two moon phase pattern discs (3 and 5) are connected by mutually locked yin and yang axes and always rotate synchronously. The date selection discs (1, 7) rotate independently. After a date is selected, the moon phase pattern disc and the date selection discs (3, 5, 1, 7) all rotate synchronously.

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