JP2005091179A - Calendar timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance visibility of date characters viewed from a calendar window. <P>SOLUTION: A calendar timepiece has a hour plate with the calendar window and a ring-shaped date plate disposed on the bottom side of the hour plate and formed with the date characters of 1-31, rotates the date plate each day, by making the date character viewed from the calendar window and displays a date. The hour plate 31 has a groove 31b disposed on the bottom side of a location corresponding to the calendar window 31a, formed and concentric with a center hole. The ring-shaped date plate 32 has a step, comprising an external high step 32d and an internal low step 32c, the date characters 32a are formed in the high step 32d of the date plate 32, and the high step 32d is accommodated in the groove 31b of the hour plate 31. Visibility of the date characters 32a is enhanced, since the distance between the surface of the calendar window 31a and the date characters 32a is reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a calendar clock having a date display, and more particularly to a calendar clock having excellent date visibility.

  Conventionally, the structure of a calendar clock of the type that displays the date from the calendar window on the dial and displays the date on the date plate that rotates every day on the lower surface of the dial is as shown in FIG. The structure is taken. 14A and 14B show a plan view and a cross-sectional view of the dial face of the calendar timepiece. FIG. 14A is a plan view, and FIG. 14B is a cross-sectional view taken along line AA in FIG. From this figure, an hour hand 5, a minute hand 6, and a second hand 7 are disposed on the surface of the dial 1. The dial 1 is provided with a calendar window 1a at 3 o'clock, so that the date letters 2a (number 28 in the figure) of the date plate 2 can be seen from the calendar window 1a. The date plate 2 is formed of a ring-shaped flat plate, and date characters 2a are formed on the surface thereof by printing or the like, and are rotated every day on the lower surface side of the calendar window 1a. The date plate 2 is disposed on the dial 1 at a position concentric with the calendar window 1a in a state of being attached to the module 4 with a gap of 50 to 150 μm.

  Although the dial and date plate have the above arrangement structure, the calendar window cannot be made too large due to the appearance problem as a clock dial. The size of the calendar window varies slightly depending on whether it is a woman or a man, but is generally designed in a range of 1.4 to 2.0 mm in length and 1.9 to 2.9 mm in width. For this reason, there is a problem that the date characters are considerably small and the characters are difficult to see. In particular, it may be impossible for a person with low vision such as an elderly person to read. Therefore, various devices have been made to improve the visual recognition. As an example, a calendar clock as shown in FIGS. 15 and 16 is disclosed in Patent Document 1 below. As for a calendar clock using a solar cell, a calendar clock as shown in FIG. 17 is disclosed in Patent Document 2 below.

JP 2002-156469 A (page 2-3, FIG. 1 and FIG. 4) JP 2002-122682 A (page 3-4, FIG. 5)

  FIG. 15 is a plan view showing a conventional mounting structure between a date plate and a module as shown in Patent Document 1, and FIG. 16 is a plan view showing an improved mounting structure between the date plate and the module. Is shown. 15 and 16 are drawn by picking up only the main parts from the diagram shown in Patent Document 1. In FIG. 15, a ring-shaped date board 2 in which date characters 2 a are formed is placed on a module 4, and an inner diameter tooth 2 b is provided around the inner diameter portion thereof. The inner diameter tooth 2 b of the date plate 2 meshes with a date driving wheel 9 provided on the module 4, and the date driving wheel 9 meshes with an intermediate wheel 8 provided on the module 4. And the date plate 2 rotates through the date indicator driving wheel 9 when the intermediate wheel 8 rotates. The date plate 2, the date indicator driving wheel 9, and the intermediate wheel 8 are designed to mesh smoothly and have a little backlash (clearance on meshing) so as to rotate smoothly. For this reason, the date characters 2a viewed from the calendar window 1a are formed to be slightly small so that they do not protrude from the calendar window 1a even if the position is slightly shifted due to the backlash. For this reason, the date character 2a becomes difficult to see, and there is a problem that visibility is lowered.

FIG. 16 shows a structure disclosed in Patent Document 1 as a technique for solving the above problem.
A jump lever 10 having elasticity is disposed in the module 4, and the jumper lever 10 urges the intermediate wheel 8 and the date plate 2 in a predetermined direction to kill the play. As a result, the date character 2a can be formed somewhat large, and the effect of improving the visibility is obtained.

  Next, FIG. 17 shows a structure relating to a dial and date plate of a calendar watch using the solar cell shown in the above-mentioned Patent Document 2, and FIG. 17 (a) is a plan view on the dial surface, (B) The figure has shown BB sectional drawing in (a) figure. From this figure, an hour hand 15, a minute hand 16 and a second hand 17 are arranged on the face of the dial 11. The dial 11 is provided with a calendar window 11a at the 3 o'clock position. A solar cell 18 is disposed on the lower surface of the dial 11, and a date plate 12 is disposed on the lower surface of the solar cell 18. And the opening part 18a of the solar cell 18 is provided in the position which continues in the outward direction of the calendar window 11a so that the date character 12a (number 7 in the figure) of the date board 12 can be seen from the calendar window 11a. From the calendar window 11a, a part of the solar cell 18 can be seen next to the date letter 12a. The date plate 12 is made of a ring-shaped flat plate, and date characters 12a are formed on the surface thereof by printing or the like. The date plate 12a rotates on the lower surface side of the calendar window 11a and the opening 18a of the solar cell 18 every day. ing. The date plate 12 is disposed in a position concentric with the calendar window 11a and attached to the module 14 with a gap of 50 to 150 μm between the solar cell 18 and the solar cell 18. The solar cell 18 is disposed on the lower surface of the dial 11 with a gap of 50 to 150 μm.

  As described above, in general, a calendar clock that does not have a solar function has a structure in which a date plate is disposed on the lower surface of the dial, and a calendar clock that has a solar function has a structure in which the date plate is disposed on the lower surface of the solar cell. Generally, metal and plastic materials are used for the dial plate, but most of them are 0.4 to 0.5 mm in thickness considering the problems of rigidity, deformation, and mounting parts such as indicators. The dial is designed in the range. Further, in order to rotate the date plate with as little force as possible, most of the date plate is made of a light plastic material. And the structure arrange | positioned by providing a fixed clearance of 50-150 micrometers between a dial plate and a solar cell is taken.

  For this reason, depending on the thickness of the dial plate, there is a problem that visibility is poor depending on the viewing angle, such as when the whole date character is not visible because it is hidden by the thickness of the calendar window when viewed from an oblique direction. It was. In addition, the shadow of the calendar window appears depending on the direction of the light, and the date characters cannot be clearly seen. Even if it was possible to make the date letters slightly larger by taking the structure that killed the rattling of the date plate, date wheel and intermediate wheel mentioned above, the calendar window itself is not so large, so the visibility is sufficient However, it was not in a situation where satisfactory visibility could be obtained.

  Furthermore, especially in calendar clocks with solar cells, the date plate is located on the lower surface of the solar cell, so the date letters on the date plate are far away from the calendar window on the dial plate, making it even more visible. Was getting worse. In addition, the design of the watch itself was restricted.

  The present invention has been made in view of the above problems, and the object of the present invention is to obtain a calendar clock that has excellent visibility by bringing date characters closer to the shallow position of the calendar window and is excellent in design. Is to provide.

The invention according to claim 1 of the present invention, which achieves the above object, comprises a dial plate provided with a calendar window, and a ring shape which is arranged on the lower surface side of the dial plate to form date letters from 1 to 31. In a calendar clock that displays the date by rotating the date plate every day and allowing the date letters to look into the calendar window, a central hole on the lower surface side of the position corresponding to the calendar window of the dial Concentric circular grooves are provided, a ring-shaped date plate is formed with a step portion consisting of an outer high step portion and an inner low step portion, and date letters are formed on the outer high step portion. Is housed in the groove of the dial and is rotated every day.

  The invention according to claim 2 of the present invention is characterized in that a solar cell is arranged between the lower step portion inside the ring-shaped date plate and the dial.

  The invention described in claim 3 of the present invention is characterized in that a solar cell is arranged in the outer peripheral portion of the dial.

  The invention according to claim 4 of the present invention is characterized in that a solar cell is arranged on at least one of the inside of the ring of the ring-shaped date plate formed with the stepped portion and the outside of the ring. is there.

  Further, the invention according to claim 5 of the present invention is a translucent dial plate provided with a calendar window, a solar cell arranged on substantially the same plane on the lower surface side of the dial plate, and dates from 1 to 31. A ring-shaped date board having letters formed thereon, and a solar cell is arranged on at least one of the inside and the outside of the ring-shaped date board, and the date board is rotated every day so that date letters are drawn from the calendar window. The date is displayed by looking at the camera.

  Moreover, the invention according to claim 6 of the present invention comprises a translucent dial plate provided with a calendar window and a translucent material disposed on the lower surface side of the dial plate. A ring-shaped date board formed with a solar cell and a solar cell arranged on the lower surface side of the date board, and a light reflecting portion is provided at a position corresponding to the calendar window of the solar cell, and the date board is rotated every day. The date is displayed by looking the date characters through the calendar window.

  The invention according to claim 7 of the present invention is characterized in that the light reflecting portion provided in the solar cell comprises a printed film or a metal film having a white color tone.

  A groove portion is provided concentrically with the center hole on the lower surface side of the position corresponding to the calendar window of the dial, and a step portion comprising an outer high step portion and an inner low step portion is provided on the ring-shaped date plate. By adopting a structure in which the date letters are formed in the high step and stored in the groove of the dial, the date letters on the date board are placed at a shallow position on the calendar window, and the date letters are closer to the surface of the calendar window. It can be visually recognized by the position. As a result, even if the date characters are viewed obliquely, they can be seen well. In addition, the shadow appearing from the thickness of the dial becomes small, and the date characters can be seen clearly, and the visibility of the date characters is greatly improved.

  Further, by adopting a configuration in which the solar cell is arranged between the lower step portion inside the date plate and the dial, the solar cell can be arranged in a state in which the visibility of the date character is improved.

  Further, by adopting a configuration in which the solar cell is arranged on the outer periphery of the dial, a new thin calendar cell design with a solar cell can be obtained in a state in which the visibility of date characters is improved.

In addition, the solar cell is provided with a solar cell in a state in which the visibility of date characters is improved by placing the solar cell on at least one of the inside of the ring-shaped ring of the ring-shaped date plate having the stepped portion or the outside of the ring. You can get a slim design of the calendar clock.

  Further, a light-transmitting dial is used, and a solar cell is arranged on the same surface as the date plate on at least one of the inside and the outside of the ring-shaped date plate on which date characters are formed. As a result, the date letters can be brought closer to the calendar window than the conventional one, and excellent visibility can be obtained, and a thin calendar clock with a new design can be obtained.

  In addition, a ring-shaped translucent date plate is arranged on the lower surface of the translucent dial, and a solar cell is arranged on the lower surface of the date plate, and light is reflected at a position corresponding to the calendar window of the solar cell. By providing the portion, the date characters on the date plate are closer to the calendar window than before, and the display characters are clearly visible by the action of the light reflecting portion of the solar cell.

  Further, by forming the light reflecting portion provided in the solar cell with a printed film or a metal film having a white color tone, the scattered / reflected light from the reflecting portion is increased, and the date letters are more clearly visible.

Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. First, the figure will be described. FIG. 1 shows an arrangement structure of a dial and date plate of a calendar timepiece according to a first embodiment of the present invention. FIG. 1 (a) is a plan view of the dial surface, and FIG. (A) CC sectional drawing in the figure is shown. 2 shows the shape of the dial in FIG. 1. FIG. 2 (a) is a plan view of the dial, and FIG. 2 (b) is a sectional view taken along line DD in FIG. 3 shows the shape of the date plate in FIG. 1. FIG. 3A is a plan view of the date plate, and FIG. 3B is a cross-sectional view of the main part in FIG. Next, FIG. 4 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a second embodiment of the present invention. FIG. 4 (a) is a plan view of the dial surface. (B) The figure has shown EE sectional drawing in (a) figure. FIG. 5 is a cross-sectional view of the main part showing the arrangement structure of the dial plate, date plate and solar cell of the calendar timepiece according to the third embodiment of the present invention. Next, FIG. 6 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a fourth embodiment of the present invention. FIG. 6 (a) is a plan view of the dial surface, (B) The figure has shown FF sectional drawing in (a) figure. FIG. 7 is a plan view relating to the arrangement of the date plate and solar cell in FIG. Next, FIG. 8 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a fifth embodiment of the present invention. FIG. 8 (a) is a plan view of the dial surface. (B) The figure has shown GG sectional drawing in (a) figure. Next, FIG. 9 shows a cross-sectional view of the main part showing the arrangement structure of the dial, date plate and solar cell of the calendar timepiece according to the sixth embodiment of the present invention, and FIG. It is principal part sectional drawing which showed the arrangement structure of the dial plate, date plate, and solar cell of the calendar timepiece concerning 7 embodiment. FIG. 11 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to an eighth embodiment of the present invention. FIG. 11 (a) is a plan view of the dial surface, and FIG. The figure shows an HH cross-sectional view in FIG. FIG. 12 shows the shape of the date plate in FIG. 11. FIG. 12 (a) is a plan view of the date plate, and FIG. 12 (b) is a cross-sectional view taken along line II in FIG. Yes. FIG. 13 shows the shape of the solar cell in FIG. 11. FIG. 13 (a) is a plan view of the solar cell, and FIG. 13 (b) is a cross-sectional view taken along line JJ in FIG. is there.

In the calendar timepiece according to the first embodiment of the present invention, as shown in FIGS. 1, 2, and 3, the dial 31 is provided with a calendar window 31a at the 3 o'clock position, and a groove on the back surface. 31b is provided. This groove portion 31b is located at a position corresponding to the position of the calendar window 31a, is concentric with the center hole of the dial, and is formed wider than the width of the calendar window 31a and slightly wider than the width of the high step portion of the date plate described later. It is. On the other hand, the date plate 32 has a ring shape, and is provided with a stepped step portion having a high step portion 32d on the outside and a low step portion 32c on the inside. Then, 1 to 31 date characters 32a are formed over the entire surface of the flat high step portion 32d by a known method such as printing. Further, an inner diameter tooth 32b that meshes with the date driving wheel of the module is formed over the entire inner diameter portion of the flat low step portion 32c. And the high step part 32d of the date board 32 is accommodated in the groove part 31b of the dial plate 31, and the high step part 32d which formed the date character 32a of the date plate 32 is the day in the groove part 31b of the dial plate 31. The date character 32a can be seen from the calendar window 31a.

Here, the step between the high step portion 32d and the low step portion 32c of the date plate 32 is set to be the same size as or slightly larger than the groove depth of the groove portion 31b of the dial 31. The clearance (gap) with the dial 31 is set equal to or slightly larger than the clearance at the high step 32d (clearance between the high step 32d and the bottom surface of the groove 31b of the dial 31). The clearance at the high step portion 32d, that is, the clearance between the high step portion 32d and the bottom surface of the groove portion 31b of the dial 31 is the same as the conventional example described in the background art, that is, the clearance of 50 to 150 μm. The date plate 32 and the dial 31 are not in contact with each other. The depth of the groove 31b provided on the back surface of the dial 31 is set in consideration of the strength of the material of the dial 31 and the resin filling property. For example, when a metal material having a thickness of 0.4 to 0.5 mm is used, the depth can be set to a depth at which the remaining thickness becomes 0.2 to 0.25 mm. This corresponds to approximately half the plate thickness. When the dial is formed by resin molding, the remaining thickness is required to be about 0.3 mm even if it is thin due to problems of filling and warping. Accordingly, the depth in this case is about 0.1 to 0.2 mm.

  By adopting such a structure, the date character 32a can be arranged at a shallow position from the calendar window 31a, that is, at a shallow position from the surface of the calendar window 31a. For example, when a metal plate is used for the dial 31, the remaining thickness of the dial 31 is 0.2 to 0.25 mm + the clearance amount is 0.05 to 0.15 mm = 0.25 to 0.4 mm. The arrangement distance from the surface of the calendar window 31a. In the conventional example described above, the arrangement distance of the date characters from the surface of the calendar window is 0.45 to 0.65 mm, and compared to the conventional example, the date characters can be brought closer to the calendar window surface by about 0.2 to 0.25 mm. it can. From this, the date character 32a can be visually recognized well. Further, since the thickness of the calendar window 31a is thin, there is almost no hidden portion of the date character 32a even if there is a viewing angle seen from an oblique direction, and the entire date character 32a can be seen well. Furthermore, even if the shadow of the calendar window 31a appears in the direction of the light, the amount (size) of the shadow is very small and hardly affects the visual recognition of the date character 32a. Therefore, the visibility of date characters is greatly improved by this structure.

  The material used for the dial 31 is not particularly limited. It is better to select according to the required specifications such as metal material plate such as aluminum, white and brass, ceramic material, plastic material such as acrylic resin and polycarbonate resin. When a metal material is used, the groove 31b formed on the back surface is formed by machining or the like. In addition, when a ceramic material or a plastic material is used, a highly accurate material can be obtained by transfer from a molding die. For the date plate 32, a metal material, a plastic material, or the like can be selected, but when a metal material (plate material) is used, the stepped portion and the inner diameter teeth 32b are formed by pressing. When a plastic material is used, the stepped portion and the inner diameter teeth 32b are transferred from the mold by injection molding.

  Although not shown in the figure, the structure for rotating the date plate 32 every day is the same as the structure described in the above-described conventional example. In other words, the inner plate 32b of the date plate 32 and the date driving wheel provided in the module are meshed with each other, and the date dial 32 is rotated by rotating the date driving wheel with the intermediate wheel provided in the module.

  Next, a calendar timepiece according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a second embodiment of the present invention. FIG. 4 (a) is a plan view of the dial surface, and FIG. The figure shows an EE cross-sectional view in FIG. The calendar clock according to the second embodiment is a calendar clock with a solar cell. The dial 41 has a calendar window 41a at 3 o'clock, and a groove 41b is provided on the back surface of the dial 41 where the calendar window 41a is located. The dial 41 has substantially the same shape as the dial 31 of the first embodiment described above, but is made of a material having transparency because it is a dial for solar cells. The date plate 42 has a ring shape like the date plate 32 of the first embodiment described above, and has a stepped portion having a high step portion 42d on the outside and a low step portion 42c on the inside. A date character 42a is formed on the outer flat high step portion 42d, and inner diameter teeth are formed on the inner diameter portion of the inner flat low step portion 42c. And the high step part 42d in which the date character 42a was formed is accommodated in the groove part 41b of the dial 41, and the solar cell 48 is disposed between the low step part 42c and the dial 41. Therefore, the step between the high step portion 42d and the low step portion 42c of the date plate 42 is provided with a step sufficient to dispose the solar cell 48. Here, the solar cell 48 is disposed on the lower surface of the dial 41 with a clearance of 50 to 150 μm. The solar cell 48 and the low step portion 42c of the date plate 42 have a clearance of 50 to 150 μm. Further, the clearance between the high step portion 42d of the date plate 42 housed in the groove portion 41b of the dial 41 and the bottom surface of the groove portion 41b is set to 50 to 150 μm as in the first embodiment. And even if the date plate 42 rotates every day, the solar cell 48 and the dial 41 are not touched. The solar cell 48 is fixed by forming a protrusion (with a flat upper surface) having a smaller diameter than the inner diameter tooth of the date plate 42 on the upper surface of the module. The solar cell 48 is fixed to the protruding portion (not shown) at a position slightly protruding from the upper surface.

  Since the dial 41 requires light transparency, in the present embodiment, it is formed by an injection molding method using a material such as acrylic resin or polycarbonate resin, and the calendar window 41a and the groove 41b on the back surface are formed at the time of molding. It is formed by transferring from the mold. The dial 41 can be formed using a ceramic material other than the resin material. Although a glass material can be used, it takes a very long time to process the calendar window 41a and the groove 41b.

  When a plastic material is used for the dial 41, the remaining amount (thickness) of the dial 41 at the groove 41b needs to be at least about 0.3 mm from the viewpoint of filling properties and warpage. Therefore, the distance between the date character 42a at the calendar window 41a and the surface of the calendar window 41a is 0.35 to 0.45 mm. In the conventional example described in the background art described above, a solar cell having an opening is disposed between the dial and the date plate, so that the distance between the date character and the calendar window surface is 0.7-1. It is about 0mm. Therefore, in the present invention, the date characters can be brought close to the calendar window by about half, and the effect of dramatically improving the visibility of the date characters can be obtained.

Either a metal material or a plastic material can be used for the date plate 42. As in the first embodiment described above, when a metal plate is used, the shape is formed by machining. When a plastic material is used, it is transferred from a mold by an injection molding method to form a shape. The date characters 42a are formed by a known method such as printing.

  By adopting the structure described above, the visibility of date characters can be dramatically improved, and the power generation function of the solar cell can be fully utilized.

Next, a calendar timepiece according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of the main part showing the arrangement structure of the dial plate, date plate and solar cell of the calendar timepiece according to the third embodiment of the present invention. The calendar clock in this embodiment is a calendar clock with a solar cell and has a structure in which the solar cell is arranged on the outer peripheral portion of the dial. As shown in FIG. 5, a solar cell 58 is provided over the entire circumference of the dial 51. The solar cell 58 has a structure in which light is received at a portion of the upper slope in the drawing. Some recent solar cells have sufficient power generation function even if the light receiving area is small. If a light receiving area of 15 to 20% of the entire dial plate has been obtained, a power generation that sufficiently satisfies the clock function has appeared. Even if the solar cell provided over the outer periphery of the dial is narrow, the area of the solar cell can be considerably widened, and a sufficient light receiving area can be easily secured.

  As in the first embodiment, the dial plate 51 has a calendar window 51a at the 3 o'clock position and a groove 51b on the back surface. On the other hand, the date plate 52 has a ring shape, and has a step portion having a high step portion 52d on the outside and a low step portion 52c on the inside, and date characters 52a are formed on the high step portion 52d. Inner diameter teeth are provided on the inner diameter portion of the low step portion 52c. And the high step part 52d which formed the date character 52a is accommodated in the groove part 51b of the dial 51, and rotates every day. Since the shape and arrangement structure of the dial 51 and the date plate 52 here are the same as those of the first embodiment, detailed description thereof is omitted here.

  The solar cell-equipped calendar timepiece having the above structure obtains exactly the same effect as that of the first embodiment in terms of visibility of display characters. And sufficient electric power generation to satisfy the timepiece function can be obtained. The solar cell provided on the outer peripheral portion of the dial can also be used as a parting plate. Furthermore, compared to the structure in which the dial, solar cell, and date plate are stacked as in the conventional example, the above structure can be made thinner, and the new design of the calendar clock with solar cell, which is different from the conventional design, is also possible. Producing. Further, in order to prevent the solar cell 58 from being directly shown, a ring made of light-transmitting resin or glass is disposed on the inside of the solar cell 58 and fixed on the surface of the dial 51, so that Appearance quality can be significantly improved.

  Next, a calendar timepiece according to a fourth embodiment of the present invention will be described with reference to FIGS. Here, FIG. 6 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a fourth embodiment of the present invention. FIG. 6 (a) is a plan view of the dial plate surface, (B) The figure shows FF sectional drawing in (a) figure. FIG. 7 is a plan view relating to the arrangement of the date plate and solar cell in FIG. As shown in FIG. 6, this calendar clock is a calendar clock with a solar cell. A structure in which a ring-shaped date plate 62 is disposed on the lower surface of the dial 61 provided with the calendar window 61a, and a solar cell 68 is disposed on the inner side of the inner diameter tooth 62b of the ring-shaped date plate 62 in substantially the same plane as the date plate 62. Is taking.

  The dial 61 is made of a plastic material, a ceramic material, or the like, has light transmittance, and is formed in a flat plate shape. A calendar window 61a is provided at the 3 o'clock position. Further, the date plate 62 is formed of a ring-shaped flat plate, the date letters 62a are formed on the upper surface, and the inner diameter teeth 62b are provided on the inner diameter portion. The date plate 62 is formed of a plastic material or a metal plate. As shown in FIG. 7, the solar cell 68 has a disk shape with a partly cutout 68b. The notch 68b is provided to avoid contact with the date indicator driving wheel 9 and the intermediate wheel 8 provided in the module for rotating the date plate 62 every day.

The date plate 62 is disposed on the lower surface of the dial 61 with a clearance of 50 to 150 μm. And the date character 62a of the date board 62 can be seen from the calendar window 61a. The solar cell 68 is disposed inside the inner diameter teeth 62 b of the date plate 62 and on the lower surface of the dial 61 with a clearance of 50 to 150 μm. Accordingly, the date plate 62 and the solar cell 68 are arranged on substantially the same plane. And it is designed so that the solar cell 68 and the dial 61 will not contact even if the date plate 62 rotates every day. The date plate 62 is rotated by engaging the date indicator wheel 9 provided in the module with the inner diameter teeth 62b of the date plate 62, and rotating the date indicator driving wheel 9 with the intermediate wheel 8 provided in the module. It has a structure. This structure is the same as the structure described in the conventional example.

  In this way, by adopting a structure in which the date plate 62 and the solar cell 68 are arranged on the lower surface of the dial 61 in substantially the same plane, the date characters 62a of the date plate 62 can be changed to a calendar window as compared with the conventional example described in the background art. It can be close to 61a. In the conventional example, the distance from the surface of the calendar window to the date letter is 0.7 to 1.0 mm, which is 0.45 to 0.65 mm according to the structure of the present invention, and the date is 0.25 to 0.35 mm. A character approaches. Thereby, the visibility of date characters is considerably improved. In addition, a solar cell calendar watch that is thinner than the conventional example in terms of the thickness of the structure in which the dial, the date plate, and the solar cell are arranged can be obtained.

  Next, a calendar timepiece according to a fifth embodiment of the invention will be described with reference to FIG. Here, FIG. 8 shows an arrangement structure of the dial plate, date plate and solar cell of the calendar timepiece according to the fifth embodiment of the present invention. FIG. 8 (a) is a plan view of the dial surface, (B) The figure shows GG sectional drawing in (a) figure. As shown in FIG. 8, the calendar clock of the present embodiment is different from the calendar clock of the fourth embodiment described above in that a solar cell is arranged on the outer peripheral portion of the ring of the ring-shaped date plate. is there.

  A ring-shaped date board 72 formed with date letters 72 a is arranged on the lower surface of the dial 71 provided with the calendar window 71 a, and a ring-shaped solar cell 78 is arranged on the same plane as the date board 72 on the outside of the date board 72. The structure arranged on the lower surface of the plate 71 is taken.

  As in the fourth embodiment, the dial 71 is formed of a plastic material or a ceramic material with light transmittance. The date plate 72 is formed of a metal plate or a plastic material as in the fourth embodiment.

  By adopting such a structure, the same effect as that of the above-described fourth embodiment, that is, a new calendar watch with a solar cell having an improved visibility and a thin design can be obtained.

  The calendar clock of the fourth embodiment has a structure in which a solar cell is arranged inside the ring-shaped date plate ring, and the calendar clock of the fifth embodiment has a solar cell outside the ring-shaped date plate ring. Takes the arranged structure. It is also possible to adopt a structure in which the solar cell is arranged on both the inner side and the outer side of the ring-shaped date plate. In this case, two types of solar cells having different outer shapes, such as a disk-shaped solar cell with a notch and a ring-shaped solar cell as shown in the drawings in the fourth embodiment, are used.

Next, a calendar timepiece according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view of the main part showing the arrangement structure of the dial, date plate and solar cell of the calendar timepiece according to the sixth embodiment of the present invention. In the calendar timepiece of the sixth embodiment, the dial and date plate have the same arrangement structure as that of the first embodiment, and the solar cell has the same arrangement structure as the solar cell of the fourth embodiment. ing. That is, as shown in FIG. 9, a ring-shaped date plate 82 in which a stepped portion comprising a high step portion 82d and a low step portion 82c is formed on the lower surface side of the dial 81 having a calendar window 81a and a groove portion 81b formed on the lower surface. Is arranged in a state where the high step portion 82d of the date plate 82 is accommodated in the groove portion 81b of the dial 81, and the solar cell 88 is disposed inside the low step portion 82c of the date plate 82. A date character 82 a is formed on the high step portion 82 d of the date plate 82 so that it can be seen from the calendar window 81 a of the dial 81. Further, an inner diameter tooth 82b is provided on the inner diameter portion of the low step portion 82c, and the inner diameter tooth 82b is rotated every day by meshing with the date indicator driving wheel of the module. Further, the solar cell 88 is disposed on the lower surface of the dial 81 with a clearance that does not contact the inner diameter teeth 82b on the inner side of the inner diameter teeth 82b of the date plate 82 and is substantially flush with the lower step portion 82c of the date plate 82. The Further, the solar cell 88 has a disk-like shape having a notch, similarly to the solar cell of the fourth embodiment described with reference to FIG.

  Here, the dial 81 is a light-transmitting dial and is made of a plastic material or a ceramic material. The date plate 82 is formed of a metal plate or a plastic material.

  By adopting such a structure, the date character 82a can be brought closer to the surface of the calendar window 81a, and the visibility of the date character 82a can be dramatically improved. In addition, the dial 81, the date plate 82, and the solar cell 88 can be arranged thinner than the conventional one, and a thin calendar watch with a solar cell can be obtained.

  Next, a calendar timepiece according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 10 is a cross-sectional view of the main part showing the arrangement structure of the dial, date plate and solar cell of the calendar timepiece according to the seventh embodiment of the present invention. The difference from the calendar timepiece of the sixth embodiment described above is that the solar cell has a structure arranged outside the ring of the ring-shaped date plate.

  From FIG. 10, the ring-shaped date board 92 which formed the level | step-difference part which consists of the high step part 92d and the low step part 92c in the lower surface side of the dial 91 which formed the groove part 91b in the calendar window 91a and the lower surface of the dial 91 The groove portion 91b is disposed in a state where the high step portion 92d is accommodated, and a solar cell 98 is disposed outside the ring of the ring-shaped date plate 92. A date character 92 a is formed on the high step portion 92 d of the date plate 92 so that it can be seen from the calendar window 91 a of the dial 91.

  The solar cell 98 disposed outside the ring of the ring-shaped date plate 92 is disposed with a clearance of 50 to 150 μm from the lower surface of the dial 91 and is disposed substantially flush with the low step portion 92c of the date plate 92. It is in a state.

  Further, the dial plate 91 here has optical transparency and is formed using a plastic material or a ceramic material. The calendar window 91a and the groove 91b are formed by transferring from a mold.

  By adopting the above structure, it is possible to obtain the same effect as that of the calendar clock of the sixth embodiment described above. That is, it is possible to obtain a calendar clock with a solar cell having a thin design while improving the visibility of display characters viewed from the calendar window.

  The calendar watch of the sixth embodiment has a structure in which a solar cell is arranged inside the ring of the ring-shaped date plate, and the calendar watch of the seventh embodiment has a solar cell arranged on the outside of the ring of the ring-shaped date plate. Although the structure which has arrange | positioned is taken, it is also possible to take the structure which arrange | positions a solar cell to both the inner side and the outer side of a ring-shaped dateplate. As the solar cell in this case, two types of solar cells having different outer shapes, a disc-shaped solar cell having a notch and a ring-shaped solar cell, are used.

Next, a calendar timepiece according to an eighth embodiment of the present invention will be described with reference to FIGS. FIG. 11 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to an eighth embodiment of the present invention. FIG. 11 (a) is a plan view of the dial surface, and FIG. The figure shows an HH cross-sectional view in FIG. FIG. 12 shows the shape of the date plate in FIG. 11. FIG. 12 (a) is a plan view of the date plate, and FIG. 12 (b) is a cross-sectional view taken along line II in FIG. Yes. FIG. 13 shows the shape of the solar cell in FIG. 11. FIG. 13 (a) is a plan view of the solar cell, and FIG. 13 (b) is a cross-sectional view taken along line JJ in FIG. is there.

  11, 12, and 13, the calendar timepiece of the present invention includes a dial 101 having a calendar window 101 a at 3 o'clock, a date plate 102 having a date letter 102 a formed over a circumference, and a part thereof. The solar cell 108 provided with the light reflecting portion 108a is sequentially stacked. And the date character 102a of the date plate 102 rotating for every day can be seen from the calendar window 101a of the dial plate 101. Further, the date character 102a is clearly seen by the light reflecting portion 108a provided in the solar cell 108 at a position corresponding to a position directly below the calendar window 101a.

  Here, the dial plate 101 is light transmissive and formed of a plastic material or a ceramic material. The calendar window 101a is formed by transferring from a mold. The date plate 102 is formed by injection molding using a light-transmitting plastic material. At the time of molding, the inner diameter teeth 102b of the inner diameter portion are also formed by transfer from a mold. After molding, the date character 102a is formed by a printing method or the like. The color of the date character 102a is appropriately determined by design specifications, but generally black is often used. As shown in the figure, the solar cell 108 has a disk shape and has an opening 108b in a part of the inside thereof. In addition, a light reflecting portion 108a is provided at a position corresponding to the position of the calendar window 101a of the dial 101. The light reflecting portion 108a is provided to reflect the light so that the date character 102a can be seen clearly, and is formed by printing using white ink. Further, the date driving wheel and intermediate wheel of the module are provided so as to protrude from the opening 108b provided in the solar cell 108, and the intermediate wheel, the date driving wheel, and the date plate 102 are engaged with each other so that the date plate rotates every day. Yes. The light reflecting portion 108a may be formed by printing, or by a method of forming a metal film by dry plating such as vapor deposition. Examples of the metal coating include silver, aluminum, nickel, chromium, palladium, hafnium, tantalum, and gold.

  Although the conventional date plate has a structure arranged on the lower surface of the solar cell, the above structure has a structure arranged on the upper surface of the solar cell. Therefore, the date characters on the date plate are closer to the surface of the calendar window, and the visibility is improved. Further, since the light reflecting portion is provided on the lower surface of the date character, the date character is clearly and clearly visible. Moreover, the design which provided the light reflection part on the lower surface of the date character as a calendar clock with a solar cell provides a new design.

  The calendar clock according to the first to eighth embodiments has been described in detail above. Among these, a dial plate having a light transmitting property is used for a structure in which a solar cell is arranged on the lower surface of the dial plate. These dials are formed by a molding method using a plastic material such as acrylic resin or polycarbonate resin, or a ceramic material. Solar cell has a unique deep purple color and does not give the user a good appearance. For this reason, measures are taken to reduce the dark purple color of the solar cell within a range that secures the required transmittance required for power generation. Many of the devices are made with a dial, but the dial of the calendar timepiece according to the present invention can sufficiently perform the device. For example, coloring may be performed, a concavo-convex pattern may be applied, or a metal vapor deposition film may be applied. Further, the dial is subjected to the above-mentioned decoration and other decorations, and is finished with an indicator such as a time letter. In addition, in order to finish the calendar window with a good appearance, a frame or the like is also applied.

  The present invention is used for a calendar clock that displays a date, and is used for a calendar clock having a solar function or a calendar clock having no solar function.

FIG. 1 shows an arrangement structure of a dial and a date plate of a calendar timepiece according to a first embodiment of the present invention. FIG. 1 (a) is a plan view of a dial surface, and FIG. 1 (b) is a diagram (a). It is CC sectional drawing in a figure. FIGS. 1A and 1B show the shape of the dial in FIG. 1, wherein FIG. 1A is a plan view of the dial, and FIG. 1B is a cross-sectional view taken along line DD in FIG. The shape of the date board in FIG. 1 is shown, (a) A figure is a top view of a date board, (b) A figure is principal part sectional drawing in (a) figure. FIG. 4 (a) is a plan view of the dial face, and FIG. 4 (b) is a plan view showing the arrangement structure of the dial, date board and solar cell of the calendar clock according to the second embodiment of the present invention. a) It is EE sectional drawing in a figure. It is principal part sectional drawing which showed the arrangement structure of the dial plate, date plate, and solar cell of the calendar timepiece which concerns on 3rd Embodiment of this invention. 6 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a fourth embodiment of the present invention. FIG. 6 (a) is a plan view of the dial surface, and FIG. a) It is FF sectional drawing in a figure. It is a top view which concerns on arrangement | positioning of the date plate and solar cell in FIG. 8 shows an arrangement structure of a dial plate, a date plate, and a solar cell of a calendar timepiece according to a fifth embodiment of the present invention. FIG. 8 (a) is a plan view of the dial surface, and FIG. a) It is GG sectional drawing in a figure. It is principal part sectional drawing which showed the arrangement structure of the dial plate, date plate, and solar cell of the calendar timepiece concerning 6th Embodiment of this invention. It is principal part sectional drawing which showed the arrangement structure of the dial plate, date plate, and solar cell of the calendar timepiece concerning 7th Embodiment of this invention. FIG. 11 (a) is a plan view of the dial face, and FIG. 11 (b) is a plan view showing the arrangement structure of the dial, date plate and solar cell of the calendar timepiece according to the eighth embodiment of the present invention. a) It is HH sectional drawing in a figure. The shape of the date plate in FIG. 11 is shown, FIG. 12A is a plan view of the date plate, and FIG. 12B is a cross-sectional view taken along the line II in FIG. FIG. 13A is a plan view of the solar cell, and FIG. 13B is a cross-sectional view taken along line JJ in FIG. 14A and 14B are a plan view and a cross-sectional view of the dial face of the calendar clock, wherein FIG. 14A is a plan view, and FIG. 14B is a cross-sectional view taken along line AA in FIG. It is a top view which shows the conventional attachment structure of the date plate and module as shown by patent document 1. FIG. It is a top view which shows the improved mounting structure of the date plate and module as shown in patent document 1. FIG. 17A shows a structure related to a dial and a date plate of a calendar clock using a solar cell disclosed in Patent Document 2. FIG. 17A is a plan view on the dial surface, and FIG. It is a BB sectional view in the figure.

Explanation of symbols

8 Intermediate wheel 9 Day wheel 31, 41, 51, 61, 71, 81, 91, 101 Dial 31a, 41a, 51a, 61a, 71a, 81a, 91a, 101a Calendar window 31b, 41b, 81b, 91b Groove 32 42, 52, 62, 72, 82, 92, 102 Date plate 32a, 42a, 52a, 62a, 72a, 82a, 92a, 102a Date letter 32b, 62b, 82b, 102b Inner diameter tooth 32c, 42c, 52c, 82c, 92c Low stage 32d, 42d, 52d, 82d, 92d High stage 48, 58, 68, 78, 88, 98, 108 Solar cell 68b Notch 108b Opening

Claims (7)

A dial plate provided with a calendar window and a ring-shaped date plate arranged on the lower surface side of the dial plate to form date letters from 1 to 31; In a calendar clock that displays the date by looking into the date letters,
The dial has a groove formed concentrically with the center hole on the lower surface side of the position corresponding to the calendar window,
The ring-shaped date plate has a step portion that becomes a high step portion on the outside and a low step portion on the inside,
A calendar timepiece in which a date character is formed in the high step portion of the date plate and is housed in a groove portion of the dial. The calendar timepiece according to claim 1, wherein a solar cell is disposed between a lower step portion inside the ring-shaped date plate and the dial. 2. A calendar timepiece according to claim 1, wherein a solar cell is disposed on an outer peripheral portion of the dial. The calendar timepiece according to claim 1, wherein a solar cell is disposed on at least one of an inner side of the ring-shaped date plate and an outer side of the ring. A translucent dial plate provided with a calendar window, a solar cell disposed on substantially the same plane on the lower surface side of the dial plate, and a ring-shaped date plate formed with date letters from 1 to 31; The solar cell is arranged on at least one of the inside and the outside of the ring-shaped date board, and the date is displayed by rotating the date board every day and allowing the calendar window to look at date letters. And calendar clock. A translucent dial plate provided with a calendar window, a translucent material disposed on the lower surface side of the dial plate, and a ring-shaped date plate having 1 to 31 date letters formed thereon, A solar cell disposed on the lower surface side, provided with a light reflecting portion at a position corresponding to the calendar window of the solar cell, and rotating the date plate every day to allow the date to be seen in the calendar window. A calendar clock characterized by displaying. The calendar clock according to claim 6, wherein the light reflecting portion is formed of a printed film having a white color tone or a metal film having a white color tone.

Images