Date display device

Abstract

The present invention provides a date display device that reduces the area occupied by the mechanism for displaying numbers from 1 to 31. [Solution] The date display device comprises a first endless band inscribed with integers from 0 to 9, and a second endless band inscribed with integers from 1 to 3, wherein one of the first endless band and the second endless band overlaps with the other of the first endless band and the second endless band intersects with each other.

Description

Technical Field

[0001] The present invention relates to a date display device that can arbitrarily display dates.

Background Art

[0002] Regarding a date display device, there is a prior art disclosed in Patent Document 1 in which an endless belt (formed by connecting both ends of the belt into a loop) marked with integers from 0 to 9 and a disk marked with integers from 1 to 3 are arranged at adjacent positions, and the integers on the endless belt are used as the units digit and the integers on the disk are used as the tens digit to display numbers from 1 to 31.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The prior art has a problem that a large area is required to place the disk and the endless belt adjacent to each other.

[0005] The present invention has been made to solve this problem, and an object thereof is to provide a date display device capable of reducing the area occupied by a mechanism for displaying numbers from 1 to 31.

Means for Solving the Problems

[0006] A first aspect for achieving this object includes a first endless belt marked with integers from 0 to 9 and a second endless belt marked with integers from 1 to 3, wherein one of the first endless belt and the second endless belt overlaps with the other of the first endless belt and the second endless belt, and the first endless belt and the second endless belt intersect with each other.

[0007] In the second embodiment, one of the first endless band and the second endless band passes through the other of the first endless band and the second endless band.

[0008] In the third embodiment, in the first or second embodiment, one of the integers inscribed on one of the first endless band and the second endless band is hidden by the other of the first endless band and the second endless band in the portion where the first endless band and the second endless band overlap.

[0009] The fourth aspect is that, in any of the first to third aspects, the second endless band has integers written vertically, and the first endless band has integers written horizontally.

[0010] The fifth aspect is the fourth aspect, wherein the second endless band has holes in the portion where it overlaps with the first endless band, where the integers written on the first endless band appear.

[0011] In the sixth embodiment, the holes are arranged in a vertical sequence of integers, as in the fifth embodiment.

[0012] In the seventh embodiment, the holes are located next to a vertically written sequence of integers, as in the fifth embodiment.

[0013] The eighth aspect includes, in any of the first to seventh aspects, at least one of a third endless band inscribed with the months from January to December, and a fourth endless band inscribed with the seven days of the week from Sunday to Saturday, wherein at least one of the third endless band and the fourth endless band overlaps with the first endless band or the second endless band. [Effects of the Invention]

[0014] According to the present invention, one of the first endless band, which is marked with integers from 0 to 9, and the second endless band, which is marked with integers from 1 to 3, overlaps with the other of the first and second endless bands, causing the first and second endless bands to intersect. Compared to cases where the disk and the endless bands are placed side by side, or where the first and second endless bands are placed side by side, the area occupied by the two endless bands can be reduced by the amount by which the first and second endless bands overlap, thus reducing the area occupied by the mechanism for displaying numbers from 1 to 31. [Brief explanation of the drawing]

[0015] [Figure 1] This is a front view of the date display device according to the first embodiment. [Figure 2] This is a front view of a date display device showing its internal structure. [Figure 3] (a) and (b) are front views of the first endless band and the unfolded second endless band. [Figure 4] (a) and (b) are front views of the first endless band and the unfolded second endless band of the date display device in the second embodiment. [Figure 5] This is a front view of the first endless band and the second endless band of the date display device in the third embodiment. [Modes for carrying out the invention]

[0016] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Figure 1 is a front view of the date display device 10 in the first embodiment. The date display device 10 is a device that can display any date and can be used, for example, as a perpetual calendar. The date display device 10 has a cover 12 that covers a plate 11 (see Figure 2), and a first opening 13, a second opening 14, and a third opening 15 that penetrate the cover 12. The first opening 13 allows a part of the first endless band 16 and a part of the second endless band 17 to appear and display the "day". The second opening 14 allows a part of the third endless band 18 to appear and display the "month". The third opening 15 allows a part of the fourth endless band 19 to appear and display the "seven days of the week".

[0017] The date display device 10 includes a first dial 20, a second dial 21, a third dial 22, and a fourth dial 23 that protrude from the cover 12. When the first dial 20 is rotated, the first endless belt 16 rotates, and when the second dial 21 is rotated, the second endless belt 17 rotates. When the third dial 22 is rotated, the third endless belt 18 rotates, and when the fourth dial 23 is rotated, the fourth endless belt 19 rotates. The rotations of the first endless belt 16, the second endless belt 17, the third endless belt 18, and the fourth endless belt 19 are independent of each other.

[0018] Examples of the materials of the first endless belt 16, the second endless belt 17, the third endless belt 18, and the fourth endless belt 19 include paper, cloth, a film made of synthetic resin, and metal foil. Papers and films may be transparent or translucent materials that allow light to pass through, or opaque materials that do not allow light to pass through. Even materials such as paper, cloth, film, and metal foil that are opaque by themselves can be adopted by making a lot of small holes in the material and allowing light to pass through the holes so that the whole becomes a translucent body.

[0019] The date display device 10 is rectangular when viewed from the front, and the first dial 20, the second dial 21, the third dial 22, and the fourth dial 23 protrude from each side of the rectangle. However, this is just an example. The shape of the date display device 10 and the positions of the respective dials can be set as appropriate. Also, it is of course possible to omit the third opening 15, the fourth endless belt 19, and the fourth dial 23 that display the days of the week and make the date display device 10 that displays the month and day (without the function of displaying the days of the week).

[0020] FIG. 2 is a front view showing the internal structure of the date display device 10 with the cover 12 (see FIG. 1) removed. In FIG. 2, the first opening 13, the second opening 14, and the third opening 15 provided in the cover 12 are shown by a two-dot chain line. The date display device 10 has the first endless belt 16, the second endless belt 17, the third endless belt 18, and the fourth endless belt 19 arranged on the plate 11 covered by the cover 12. The first dial 20, the second dial 21, the third dial 22, and the fourth dial 23 protrude outside the plate 11.

[0021] The first endless belt 16 is kept in a stretched state by two rollers 24 and 25 arranged therein. The rollers 24 and 25 are rotatably fixed to the plate 11. The first dial 20 is coupled to the roller 24. On the surface of the first endless belt 16, ten integers from 0 to 9 are written horizontally in order at equal intervals from each other. In the embodiment, Arabic numerals are written on the first endless belt 16, but it is not limited thereto, and Roman numerals, Chinese numerals, etc. are appropriately set.

[0022] The second endless belt 17 is kept in a stretched state by two rollers 26 and 27 arranged therein. The rollers 26 and 27 are rotatably fixed to the plate 11. The second dial 21 is coupled to the roller 26. On the surface of the second endless belt 17, three integers from 1 to 3 are written vertically in order at intervals from each other. In the embodiment, Arabic numerals are written on the second endless belt 17, but it is not limited thereto, and Roman numerals, Chinese numerals, etc. are appropriately set.

[0023] A hole 28 is provided to the immediate right of the vertical arrangement of the integers on the second endless belt 17. The hole 28 extends along the arrangement of the integers to a length equal to the arrangement of the integers. The width of the hole 28 is larger than the width of the numbers written on the first endless belt 16. When the second endless belt 17 is made of an opaque material, a part of the second endless belt 17 is cut away to form the hole 28. When the second endless belt 17 is made of a transparent or translucent material, the portion of the second endless belt 17 through which light passes is the hole 28. The entire portion of the vertical arrangement of the integers adjacent to the hole 28 in the second endless belt 17 is opaque.

[0024] The second endless belt 17 is arranged to overlap the first endless belt 16, and the second endless belt 17 is orthogonal to the first endless belt 16. Note that it is not essential for the second endless belt 17 and the first endless belt 16 to be orthogonal, and it is possible to write italicized numbers on the second endless belt 17 and the first endless belt 16 and make the second endless belt 17 and the first endless belt 16 intersect obliquely according to the inclination of the numbers.

[0025] The width of the second endless band 17 is greater than the width of two sequences of numbers inscribed on the first endless band 16, and less than the width of three sequences of numbers inscribed on the first endless band 16. In this embodiment, the first endless band 16 passes through the second endless band 17, and at the point where the second endless band 17 intersects with the first endless band 16, the surface of the first endless band 16 faces the back surface of the second endless band 17.

[0026] Figure 3(a) is a front view of the first endless band 16 and the unfolded second endless band 17. The second endless band 17 has holes 29 arranged in a vertical sequence of integers (between the numbers 1 and 3). The length of the holes 29 is greater than the height of the individual numbers inscribed on the first endless band 16, and the width of the holes 29 is greater than the width of the individual numbers inscribed on the first endless band 16. If the second endless band 17 is made of an opaque material, a portion of the second endless band 17 is cut out to create the holes 29. If the second endless band 17 is made of a transparent or translucent material, the portion of the second endless band 17 that allows light to pass through is the hole 29.

[0027] A blank area 30 is provided adjacent to the hole 29 in the width direction of the second endless band 17 and adjacent to the hole 28 in the length direction of the second endless band 17, where no numbers are written and there are no holes. The length of the blank area 30 is greater than the height of the individual numbers written on the first endless band 16, and the width of the blank area 30 is greater than the width of the individual numbers written on the first endless band 16. If the second endless band 17 is made of an opaque material, the blank area 30 is part of the material. If the second endless band 17 is made of a transparent or translucent material, an opaque object that does not transmit light (the blank area 30) is provided on the second endless band 17.

[0028] The width of the first opening 13 is greater than the width of the numbers inscribed on the second endless band 17 and the numbers inscribed on the first endless band 16 placed side by side, but less than the width of the second endless band 17. The height of the first opening 13 is greater than the height of the individual numbers inscribed on the second endless band 17 and the first endless band 16, but less than the length of two numbers inscribed on the second endless band 17 placed side by side vertically.

[0029] The number written on the second endless band 17 is used as the tens digit, and the number written on the first endless band 16, visible through the hole 28 in the second endless band 17, is used as the units digit, allowing two-digit numbers from 10 to 31 to be displayed in the first opening 13. The number to the left of the number on the first endless band 16 (0 in this embodiment) visible through the hole 28 (9 in this embodiment) is hidden behind the second endless band 17.

[0030] Figure 3(b) is a front view of the first endless band 16 and the unfolded second endless band 17, which is the state in which the second endless band 17 has been rotated upward by two digits from the state in Figure 3(a). The blank area 30 of the second endless band 17 hides the digit of the first endless band 16 (0 in this embodiment), and the digit of the first endless band 16 (9 in this embodiment) is visible through the hole 29 of the second endless band 17. Since the hole 29 and the blank area 30 are aligned in the width direction of the second endless band 17, only one digit of the first endless band 16 appears in the first opening 13. This allows single-digit numbers from 1 to 9 to be displayed in the first opening 13.

[0031] When the second endless band 17 is rotated upward by one number from the state in Figure 3(b) where "9" is displayed in the first opening 13, the number "1" and hole 28 of the second endless band 17 appear in the first opening 13. Since the number "0" of the first endless band 16 appears through the hole 28, "10" is displayed in the first opening 13. A single operation of rotating the second endless band 17 by one number allows switching between the single-digit "9" and the double-digit "10" notation.

[0032] Let's return to Figure 2 for explanation. The third endless band 18 is kept taut by two rollers 31 and 32 positioned within the third endless band 18. The rollers 31 and 32 are rotatably fixed to the plate 11. The third dial 22 is connected to the roller 31. On the surface of the third endless band 18, letters and symbols representing the months from January to December are written vertically in order with spacing between them. The letters and symbols written on the third endless band 18 can be appropriately selected as long as they can identify the month, such as numbers, abbreviated English names, or Japanese month names.

[0033] The width of the second opening 14 is greater than the width of each individual notation on the third endless band 18, but less than the width of the third endless band 18. The height of the second opening 14 is greater than the height of each individual notation on the third endless band 18, but less than the length of two notations on the third endless band 18 placed vertically side by side. This allows characters or symbols representing the month to be displayed in the second opening 14.

[0034] The third endless band 18 is aligned with the second endless band 17 in the width direction of the second endless band 17. The third endless band 18 is positioned overlapping with the first endless band 16, and the third endless band 18 is perpendicular to the first endless band 16. However, it is not essential that the third endless band 18 and the first endless band 16 are perpendicular to each other; it is possible to write italicized letters on the third endless band 18 and have the third endless band 18 and the first endless band 16 intersect diagonally according to the inclination of the letters. In this embodiment, the third endless band 18 passes through the first endless band 16, and at the point where the third endless band 18 intersects with the first endless band 16, the surface of the third endless band 18 faces the back surface of the first endless band 16.

[0035] The fourth endless band 19 is kept taut by two rollers 33 and 34 positioned within it. The rollers 33 and 34 are rotatably fixed to the plate 11. The fourth dial 23 is coupled to the roller 33. The seven days of the week, from Sunday to Saturday, are inscribed on the surface of the fourth endless band 19 in horizontal writing with spacing between them. The seven days of the week inscribed on the fourth endless band 19 can be appropriately selected from kanji, abbreviated English names, symbols, or anything else that can identify the seven days of the week.

[0036] The width of the third opening 15 is greater than the width of each individual notation on the fourth endless band 19, but less than the width of two of the notations on the fourth endless band 19 placed side by side. The height of the third opening 15 is greater than the height of the notation on the fourth endless band 19, but less than the width of the fourth endless band 19. This allows the characters or symbols representing the seven days of the week to be displayed in the third opening 15.

[0037] The fourth endless band 19 is aligned with the first endless band 16 in the width direction of the first endless band 16. The fourth endless band 19 is positioned overlapping with the third endless band 18, and the fourth endless band 19 is perpendicular to the third endless band 18. However, it is not essential that the fourth endless band 19 and the third endless band 18 are perpendicular to each other; it is possible to write italicized letters on the fourth endless band 19 and have the fourth endless band 19 and the third endless band 18 intersect diagonally according to the inclination of the letters. In this embodiment, the fourth endless band 19 passes through the third endless band 18, and at the point where the fourth endless band 19 intersects with the third endless band 18, the surface of the fourth endless band 19 faces the back surface of the third endless band 18.

[0038] In the date display device 10, the first endless band 16 and the second endless band 17 overlap and intersect with each other. Therefore, compared to the prior art where the disk and endless bands are placed side by side or the first endless band 16 and the second endless band 17 are placed side by side, the area occupied by the endless bands 16 and 17 can be reduced by the amount of overlap between the first endless band 16 and the second endless band 17. Since the area occupied by the mechanism for displaying numbers in the first opening 13 can be reduced, the area of ​​the plate 11 can be reduced.

[0039] Since the first endless band 16 passes through the second endless band 17, the combined thickness of the first endless band 16 and the second endless band 17 can be reduced compared to the case where the first endless band 16 does not pass through the second endless band 17 but simply overlaps with it. Therefore, this is advantageous for making the date display device 10 thinner.

[0040] By writing integers from 0 to 9 horizontally in the first endless band 16 and writing each integer vertically, it is possible to balance the size of the integers written in the first endless band 16 with the integers from 1 to 3 written vertically in the second endless band 17. Furthermore, by narrowing the spacing of the notations in the first endless band 16, the length of the first endless band 16 that needs to write integers from 0 to 9 can be made as short as possible. This further reduces the area occupied by the first endless band 16 and the second endless band 17.

[0041] In the portion overlapping with the first opening 13, one of the numbers inscribed on the first endless band 16 is hidden behind the second endless band 17. Therefore, the spacing of the markings on the first endless band 16 can be narrowed compared to the case where no numbers are inscribed on the first endless band 16 so that the numbers are hidden by the second endless band 17. Consequently, the area occupied by the first endless band 16 can be further reduced.

[0042] The third endless band 18, which displays the months from January to December, is positioned overlapping with the first endless band 16, which is longer than the second endless band 17. This reduces the area required for the first endless band 16 and the third endless band 18 compared to when they are placed side by side. Therefore, this is advantageous for miniaturizing the date display device 10 (reducing the area of ​​the plate 11).

[0043] Since the third endless band 18 passes through the first endless band 16, the thickness occupied by the first endless band 16 and the third endless band 18 can be reduced compared to the case where the third endless band 18 does not pass through the first endless band 16 but simply overlaps with it. Therefore, this is advantageous for making the date display device 10 thinner.

[0044] The fourth endless band 19, on which the seven days of the week are indicated, is positioned overlapping with the third endless band 18. This reduces the area required for the fourth endless band 19 and the third endless band 18 compared to when they are positioned side by side. Therefore, this is advantageous for miniaturizing the date display device 10 (reducing the area of ​​the plate 11).

[0045] Since the fourth endless band 19 passes through the third endless band 18, the thickness occupied by the fourth endless band 19 and the third endless band 18 can be reduced compared to the case where the fourth endless band 19 does not pass through the third endless band 18 but simply overlaps with it. Therefore, this is advantageous for making the date display device 10 thinner.

[0046] The second endless band 17 has holes 28 and 29 in the area where it overlaps with the first endless band 16, where the integers written on the first endless band 16 appear. Therefore, one-digit and two-digit numbers can be represented using the numbers on the first endless band 16 visible through holes 28 and 29. Hole 29 is located in the vertical arrangement of integers on the second endless band 17, so a one-digit number can be represented using the numbers on the first endless band 16 visible through hole 29. Hole 28 is located next to the vertical arrangement of integers on the second endless band 17, so a two-digit number can be represented using the numbers on the first endless band 16 and the numbers on the second endless band 17 visible through hole 28.

[0047] A second embodiment will be described with reference to Figure 4. In the first embodiment, a case was described in which holes 28 and 29 are provided in the second endless band 17. In contrast, the second embodiment will describe a date display device 40 that includes a second endless band 41 without holes. In the second embodiment, parts that are the same as those described in the first embodiment are denoted by the same reference numerals, and some of the following descriptions will be omitted. The material of the second endless band 41 is the same as the material of the second endless band 17, so its description will be omitted.

[0048] Figures 4(a) and 4(b) are front views of the first endless band 16 and the unfolded second endless band 41 of the date display device 40 in the second embodiment. The third endless band 18 and the fourth endless band 19, etc., are not shown.

[0049] On the surface of the second endless band 41, three integers from 1 to 3 are written vertically in order, spaced apart from each other. Between the notations of the second endless band 41, there is a blank area 42 where no numbers are written and there are no holes. The length of the blank area 42 is greater than the height of the individual numbers written on the first endless band 16, and the width of the blank area 42 is greater than the width of the individual numbers written on the first endless band 16.

[0050] The second endless band 41 is positioned overlapping with the first endless band 16, and the second endless band 41 is perpendicular to the first endless band 16. However, it is not essential that the second endless band 41 and the first endless band 16 are perpendicular to each other; it is possible to mark the second endless band 41 and the first endless band 16 with italicized numbers and make them intersect diagonally according to the slope of the numbers.

[0051] The width of the second endless band 41 is greater than the width of the individual numbers inscribed on the first endless band 16, but less than the width of two sequences of numbers inscribed on the first endless band 16. In this embodiment, the first endless band 16 passes through the second endless band 41, and at the point where the second endless band 41 intersects with the first endless band 16, the surface of the first endless band 16 faces the back surface of the second endless band 41.

[0052] As shown in Figure 4(a), the number written on the second endless band 41 is used as the tens digit, and the number written on the first endless band 16 is used as the units digit, allowing two-digit numbers from 10 to 31 to be displayed in the first opening 13. The number to the left of the number on the first endless band 16 (0 in this embodiment) that is visible through the first opening 13 (9 in this embodiment) is hidden behind the second endless band 41. As shown in Figure 4(b), the blank space 42 of the second endless band 41 hides the number on the first endless band 16 (8 in this embodiment), allowing one-digit numbers from 1 to 9 to be displayed in the first opening 13, with the number written on the first endless band 16 being the units digit.

[0053] A third embodiment will be described with reference to Figure 5. In the first and second embodiments, a case was described in which the numbers are written horizontally on the first endless band 16 and vertically on the second endless bands 17 and 41. In contrast, the third embodiment will describe a case in which the numbers are written vertically on the first endless band 51 and horizontally on the second endless band 52. In the third embodiment, parts that are the same as those described in the first embodiment are denoted by the same reference numerals, and some of the following descriptions will be omitted. The materials of the first endless band 51 and the second endless band 52 are the same as the materials of the first endless band 16 and the second endless band 17, so their description will be omitted.

[0054] Figure 5 is a front view of the first endless band 51 and the second endless band 52 of the date display device 50 in the third embodiment. The third endless band 18 and the fourth endless band 19, etc., are not shown. Ten integers from 0 to 9 are written vertically on the surface of the first endless band 51, with equal spacing between them.

[0055] On the surface of the second endless band 52, three integers from 1 to 3 are written horizontally in order, spaced apart from each other. Between the markings of the second endless band 52, there is a blank area 53 where no numbers are written and no holes are present. The second endless band 52 is positioned overlapping the first endless band 51, and the second endless band 52 intersects the first endless band 51 perpendicularly. However, the perpendicularity of the second endless band 52 and the first endless band 51 is not mandatory; it is possible to write italicized numbers on the second endless band 52 and the first endless band 51, and to make the second endless band 52 and the first endless band 51 intersect diagonally according to the inclination of the numbers. In this embodiment, the second endless band 52 passes through the first endless band 51, and at the point where the second endless band 52 intersects with the first endless band 51, the surface of the second endless band 52 faces the back surface of the first endless band 51.

[0056] If the blank space 53 of the second endless band 52 appears in the first opening 13, the number written on the first endless band 51 can be used as the units digit, and single-digit numbers from 1 to 9 can be displayed in the first opening 13. Part of the notation on the second endless band 52 is hidden by the first endless band 51. If the number on the second endless band 52 appears in the first opening 13, the number written on the second endless band 52 can be used as the tens digit, and the number written on the first endless band 51 can be used as the units digit, and two-digit numbers from 10 to 31 can be displayed in the first opening 13.

[0057] Although the present invention has been described above based on embodiments, it can be easily inferred that the present invention is not limited in any way and that various improvements and modifications are possible without departing from the spirit of the present invention. For example, the arrangement of the first endless bands 16, 51, the second endless bands 17, 41, 52, the third endless band 18, and the fourth endless band 19 is just one example and can be set as appropriate.

[0058] In the embodiment, the case in which the third endless band 18 passes through the first endless band 16 has been described, but it is not necessarily limited to this. It is certainly possible to arrange the first endless band 16 and the third endless band 18 so that the first endless band 16 passes through the third endless band 18.

[0059] In the embodiment described, the third endless band 18 is positioned so as to overlap with the first endless band 16, and the fourth endless band 19 is positioned next to the first endless band 16. However, the embodiment is not necessarily limited to this. It is certainly possible to position the fourth endless band 19 so as to overlap with the first endless band 16, and the third endless band 18 is positioned next to the first endless band 16 so as to overlap with the fourth endless band 19.

[0060] In the embodiment, the case in which the fourth endless band 19 is placed next to the second endless band 17 has been described, but it is not necessarily limited to this. It is certainly possible to make the second endless band 17 slightly longer so that the fourth endless band 19 and the second endless band 17 overlap. In this case, the second endless band 17 may pass through the fourth endless band 19, or the fourth endless band 19 may pass through the second endless band 17.

[0061] In the embodiment, the case in which the fourth endless band 19 passes through the third endless band 18 has been described, but it is not necessarily limited to this. It is certainly possible to arrange the fourth endless band 19 and the third endless band 18 so that the third endless band 18 passes through the fourth endless band 19. [Explanation of symbols]

[0062] 10,40,50 Date display 16,51 The first endless band 17,41,52 The second endless band 18. The third endless band 19. The Fourth Endless Band 28,29 holes

Claims

1. The first endless band contains integers from 0 to 9, It comprises a second endless band on which integers from 1 to 3 are written, A date display device in which one of the first endless band and the second endless band overlaps with the other of the first endless band and the second endless band, and the first endless band and the second endless band intersect with each other.

2. The date display device according to claim 1, wherein one of the first endless band and the second endless band passes through the other of the first endless band and the second endless band.

3. A date display device according to claim 1 or 2, wherein one of the integers inscribed on one of the first endless band and the second endless band is hidden by the other of the first endless band and the second endless band in the portion where the first endless band and the second endless band overlap.

4. The aforementioned second endless band is written with integers in vertical writing, The date display device according to claim 1 or 2, wherein the first endless band is inscribed with integers horizontally.

5. The date display device according to claim 4, wherein the second endless band has holes in the portion where it overlaps with the first endless band, in which the integers inscribed on the first endless band appear.

6. The date display device according to claim 5, wherein the holes are arranged in a vertical arrangement of integers.

7. The date display device according to claim 5, wherein the aforementioned holes are provided next to a vertical arrangement of integers.

8. It includes at least one of a third endless band inscribed with the months from January to December, and a fourth endless band inscribed with the seven days of the week from Sunday to Saturday, The date display device according to claim 1 or 2, wherein at least one of the third endless band and the fourth endless band overlaps with the first endless band or the second endless band.

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