Electronic watch

Abstract

The present invention provides an electronic watch, which is characterized by comprising: a rotatable ring-shaped member; a base material having at least one protrusion; and a sheet-like member disposed between the base material and the annular member, the position of the sheet-like member being restricted by the at least one protrusion, and the annular member being supported by the protrusion.

Description

Technical Field

[0001] The invention relates to an electronic watch. Background Art

[0002] Electronic devices such as watches include a housing and a plurality of components assembled inside the housing. In order to position the components relative to each other, protrusions or pins are used.

[0003] In the technology described in Japanese Patent Gazette No. 2017-37057, a base plate, a magnetic shielding plate as a sheet component, a date wheel, and a solar panel are stacked in sequence in a housing. A plurality of protrusions are formed on the base plate, a plurality of holes are formed on the magnetic shielding plate, and the protrusions are respectively embedded in the holes, thereby determining the position of the magnetic shielding plate. These protrusions are arranged along the inner circumference of the date wheel, and the solar panel is supported by the convex portion from below. Thus, the protrusions play the two roles of positioning the magnetic shielding plate (sheet component) and supporting the solar panel.

[0004] However, in the technology described in Japanese Patent Application Laid-Open No. 2017-37057, since the date wheel and the anti-magnetic plate are arranged to overlap, there is a problem that when the date wheel rotates, large friction is generated between the date wheel and the anti-magnetic plate supporting the date wheel. Summary of the invention

[0005] An electronic watch according to one embodiment of the present invention is characterized in that it comprises: a rotatable annular component; a base material having at least one protrusion; and a sheet component arranged between the base material and the annular component, wherein the position of the sheet component is restricted by the at least one protrusion, and the annular component is supported by the protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is an exploded perspective view of the interior of an electronic watch.

[0007] Figure 2 It is a perspective view of the main board and spacer inside the electronic watch.

[0008] Figure 3 This is a three-dimensional diagram of the main board and solar panel inside the electronic watch.

[0009] Figure 4 It is a top view of the interior of an electronic watch.

[0010] Figure 5 It is a cross-sectional view along the cutting line V.

[0011] Figure 6 yes Figure 2 A magnified view of a portion of .

[0012] Figure 7It is a perspective view showing the back side of the date display plate.

[0013] Figure 8 It is a three-dimensional view of a main board and a solar cell panel in a modified example.

[0014] Fig. 9 It is a three-dimensional view of a main board and a solar cell panel in a modified example.

[0015] Fig.10 It is a cross-sectional view of the installation portion of the date display plate in the comparative example.

[0016] Fig.11 It is a cross-sectional view of the installation portion of the date display plate in the comparative example. DETAILED DESCRIPTION

[0017] Hereinafter, the embodiments are described with reference to the accompanying drawings. The features and technical effects of the embodiments are understood according to the following detailed description and the accompanying drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Since the accompanying drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples of the accompanying drawings.

[0018] In the following description, when ordinals such as "first" and "second" are given common names, the ordinals are used to identify the objects to which the ordinals are given. The ordinals do not limit the objects to which the ordinals are given to specific objects, and the ordinals do not determine the order, ranking, sequence, rank, priority, or inferiority of the objects to which the ordinals are given.

[0019] <1. Electronic watches>

[0020] Figure 1 1 is an exploded perspective view of the interior of an electronic watch 1. The electronic watch 1 is a watch for indicating time. The electronic watch 1 has a housing, Figure 1 The components of the electronic watch 1 shown are housed in a housing. The housing is worn on the wrist of the user through an arm strap or an armband. The housing has a housing body made of metal or resin in a flat cylindrical or frame-shaped form, a transparent windshield made of resin or glass, and a back cover made of metal or resin. The windshield is fixed to the surface (front surface) of the housing body in a manner covering the hollow of the housing body, and the back cover is fixed to the back of the housing body in a manner covering the hollow of the housing body.

[0021] like Figure 1 As shown, the electronic watch 1 includes a circuit substrate 10, a main board 20, a spacer 40, a solar panel 50, a date wheel 60, a date wheel pressing member 70 and a dial 80 in order from the back to the front. The electronic watch 1 also includes a frame 45, a date display plate 90 and a double-sided tape 93. Figure 1 to Figure 5 , these components are described in detail. Figure 2It is a perspective view of the main board 20 and the spacer 40 . Figure 3 It is a three-dimensional diagram of the main board 20 and the solar cell panel 50 . Figure 4 is a top view of the interior of the housing. Figure 4 The viewing direction is from the windshield toward the rear cover. Figure 4 In the figure, the dial 80 is omitted. Figure 5 is to observe along the direction of the arrow Figure 4 A cross-sectional view of a section along the cutting line V is shown.

[0022] (1) Circuit board

[0023] The circuit board 10 has electrical components such as an antenna, a transceiver with an antenna, a light emitting element, a terminal, an IC (Integrated Circuit) chip, and a secondary battery mounted on the circuit board 10 .

[0024] (2) Motherboard (substrate)

[0025] like Figure 2 As shown, the main board 20 overlaps with the surface of the circuit substrate 10. The surface of the main board 20 refers to the surface facing the windshield. The back of the main board 20 refers to the surface facing the rear cover.

[0026] The shape of the main board 20 is based on a circular plate shape around a central axis passing through the center of the main board 20. Hereinafter, the direction parallel to the central axis passing through the center of the main board 20 is referred to as an axial direction, the direction along a circle around the central axis is referred to as a circumferential direction, and the direction along a diameter perpendicular to the central axis is referred to as a radial direction. The direction from the front to the back of the main board 20 and the opposite direction are parallel to the axial direction. The thickness direction of the main board 20 is parallel to the axial direction.

[0027] The main board 20 is a base material on which components such as a plurality of motors 21, a plurality of gear train mechanisms 23, a crown 25, a solar panel 50, and a spacer 40 are mounted. In order to properly accommodate these components and install, mount, stick, fix, support, hold, or arrange these components on the main board 20, the main board 20 has pins, protrusions, ribs, depressions, holes, cutouts, grooves, and internal threads. The motor 22 among the plurality of motors 21 is connected to the gear train mechanism 24 among the plurality of gear train mechanisms 23, and the gear train mechanism 24 is connected to the date wheel 60, and the date wheel 60 is driven to rotate by the motor 22 and the gear train mechanism 24. Other motors 21 and other gear train mechanisms 23 drive the hands such as the second hand, minute hand, hour hand, or function hand to rotate.

[0028] In order to properly accommodate the solar cell panel 50 , the spacer 40 , the date display plate 90 , etc. and arrange the solar cell panel 50 and the spacer 40 on the surface of the main plate 20 , the surface of the main plate 20 is formed as follows.

[0029] The main board 20 has a convex portion 31 on the outer periphery of the surface of the main board 20. The convex portion 31 is formed along the outer periphery of the surface of the main board 20. The convex portion 31 is interrupted at various locations on the outer periphery of the surface of the main board 20.

[0030] The main plate 20 has a plurality of first protrusions 32 on the surface of the main plate 20. The first protrusions 32 are formed in a concentric arc shape so as to extend circumferentially on the radial inner side of the convex portion 31. The radial width of the first protrusion 32 is smaller than the width from the inner circumference to the outer circumference of the date wheel 60 described later. The radial width of the first protrusion 32 refers to the dimension from the radial inner edge to the radial outer edge of the first protrusion 32.

[0031] The main board 20 has a first configuration area 33 on the surface of the main board 20. The first configuration area 33 faces the windshield. The first configuration area 33 expands in the circumferential direction between the convex portion 31 and the first protrusion 32. A portion of the first configuration area 33 expands from between the first protrusions 32 to the radially inner side of the first protrusion 32, and these portions are referred to as expansion portions 34a and 34b. In the present embodiment, the number of expansion portions 34a and 34b is two, but it may be more than three, or it may be one. The first expansion portion 34a and the second expansion portion 34b are arranged approximately symmetrically with respect to the center of the main board 20. The height of the first configuration area 33 is smaller than the height of the top of the convex portion 31. Therefore, the convex portion 31 protrudes from the first configuration area 33, and there is a step between the first configuration area 33 and the top of the convex portion 31. Similarly, the height of the first configuration area 33 is lower than the height of the top of the first protrusion 32. Here, the height refers to the axial position.

[0032] The main board 20 has a second configuration area 35 at the center of the surface of the main board 20. The second configuration area 35 faces the windshield in the same manner as the first configuration area 33. Therefore, the second configuration area 35 faces the same direction as the direction faced by the first configuration area 33. The second configuration area 35 extends radially inward of the first configuration area 33. The height of the second configuration area 35 is higher than the height of the first configuration area 33, and there is a step between the second configuration area 35 and the first configuration area 33. The first protrusion 32 extends circumferentially at the boundary between the first configuration area 33 and the second configuration area 35. The height of the second configuration area 35 is lower than the height of the first protrusion 32. Therefore, the first protrusion 32 protrudes from the second configuration area 35, and there is a step between the second configuration area 35 and the top of the first protrusion 32.

[0033] The main board 20 has a circular boss 38 formed on the second expansion portion 34b of the first configuration area 33. The boss 38 protrudes from the second expansion portion 34b of the first configuration area 33. The height of the top of the boss 38 is higher than the height of the second configuration area 35. The height of the top of the boss 38 is higher than the height of the top of the first protrusion 32. The boss 38 is arranged at a position radially inward of a circle passing through the first protrusion 32 and the second protrusion 39 described later. The boss 38 is used to position the solar cell panel 50.

[0034] The main board 20 has a second protrusion 39 formed on the first expansion portion 34a of the first configuration area 33. The second protrusion 39 protrudes from the first expansion portion 34a of the first configuration area 33. The second protrusion 39 is formed in an arc shape in a manner extending in the circumferential direction. The radial width of the second protrusion 39 is smaller than the width from the inner circumference to the outer circumference of the date wheel 60 described later. The radial width of the second protrusion 39 refers to the dimension from the radial inner edge to the radial outer edge of the second protrusion 39. The second protrusion 39 is concentric with the first protrusion 32, and the second protrusion 39 and the first protrusion 32 are arranged on the same circumference. The height of the top of the second protrusion 39 is higher than the height of the second configuration area 35. The height of the top of the second protrusion 39 is approximately equal to the height of the top of the first protrusion 32. The height of the top of the second protrusion 39 is lower than the height of the top of the boss 38. The second protrusion 39 is used to stop the rotation of the solar cell panel 50.

[0035] Figure 6 yes Figure 3 A magnified view of a portion of Figure 6 As shown, the main board 20 has a pair of guides 94, a pair of guides 95, and an adhesive portion 96 formed in the first configuration area 33. When the positions of the guides 94, 95, and the adhesive portion 96 are expressed by the clock position, the guides 94, 95, and the adhesive portion 96 are arranged at the 4.5 o'clock position. The guides 94, 95, and the adhesive portion 96 protrude from the first configuration area 33, and the tops of the guides 94, 95 are higher than the tops of the adhesive portion 96. The adhesive portion 96 is arranged in a rectangular shape. The guides 94, 95 surround the adhesive portion 96. The guides 94 place the adhesive portion 96 between them and are separated from each other in the radial direction, and are arranged along the opposite sides of one side of the adhesive portion 96. The guides 95 place the adhesive portion 96 between them and are separated from each other in the circumferential direction, and are arranged along the opposite sides of the other side of the adhesive portion 96. The guides 94 and the guides 95 are separated from each other in a manner that does not form an angle. The planar shape of the guide portion 94, the guide portion 95 and the adhesive portion 96 is a rectangular shape with four corners cut off. The guide portions 94, 95 and the adhesive portion 96 are used to determine the installation position of the date display plate 90.

[0036] In addition, the guides 94, 95 and the adhesive portion 96 may be arranged at the 3 o'clock position similarly to the crown 25. In this case, the backs of the guides 94, 95 and the adhesive portion 96 may be concave, and the components of the crown 25 may be arranged on the back of the main board 20 in a manner such that they are accommodated in the concave portions on the backs of the guides 94, 95 and the adhesive portion 96.

[0037] (3) Framework

[0038] like Figure 1 as well as Figure 4 As shown, the frame 45 is provided in a ring shape and is mounted on the outer periphery of the main board 20 .

[0039] (4) Spacer

[0040] like Figure 1 , Figure 2 as well as Figure 5 As shown, the spacer 40 is provided in a sheet shape. The spacer 40 overlaps the center of the surface of the main board 20. Specifically, the spacer 40 is placed in the second configuration area 35 of the main board 20. The spacer 40 can be fixed to the main board 20 by an adhesive, a tape or a screw. The spacer 40 can also have a hole for the convex portion formed on the surface of the main board 20 to be embedded.

[0041] (5) Date display panel and double-sided tape

[0042] Figure 7 2 is a perspective view showing the back side of the date display plate 90. Figure 6 as well as Figure 7 As shown, the date display plate 90 is made of a metal material. The date display plate 90 has a rectangular recess 91 and a frame 92 surrounding the recess 91 on the back of the date display plate 90. Since the adjacent sides of the frame 92 form the corners of the frame 92, the rigidity of the corners of the frame 92 is greater than the rigidity of the sides of the frame 92. The back of the date display plate 90 faces the guides 94, 95 and the adhesive part 96 of the main board 20, and the guides 94, 95 and the adhesive part 96 are embedded in the recess 91, and the date display plate 90 is placed on the guides 94 and 95. The date display plate 90 is adhered to the adhesive part 96 by a double-sided tape 93. When the positions of the date display plate 90, the guides 94, 95 and the adhesive part 96 are expressed by the clock position, the date display plate 90, the guides 94, 95 and the adhesive part 96 are arranged at the 4.5 o'clock position.

[0043] Even if the outer shape of the guide parts 94 and 95 becomes larger or the recess 91 becomes smaller due to manufacturing errors, the planar shape of the guide parts 94, 95 and the adhesive part 96 is a rectangular shape with four corners cut off, so the guide parts 94, 95 and the adhesive part 96 can be easily inserted into the recess 91 when the date display plate 90 is installed. Fig.10 as well as Fig.11 A comparative example will be described. Fig.10 as well as Fig.11 is a cross-sectional view of a comparative example. Fig.10 as well as Fig.11 As shown in FIG. 1 , in the comparative example, a rectangular convex portion 196 is formed instead of the guide portion 94, the guide portion 95, and the adhesive portion 96. Fig.10 As shown, if there is little error in manufacturing the concave portion 91 and the rectangular convex portion 196, the rectangular convex portion 196 can be easily embedded in the concave portion 91. Fig.11 As shown, if the recess 91 is smaller than the design size due to an error during manufacturing, or the rectangular protrusion 196 is larger than the design size due to an error during manufacturing, when the rectangular protrusion 196 is inserted into the recess 91, the corner of the frame 92 is difficult to deform, so the rectangular protrusion 192 is difficult to insert into the recess 91. Therefore, it can be seen that the absence of a corner between the guide portion 94 and the guide portion 95 helps to facilitate the installation of the date display plate 90.

[0044] (6) Solar panels

[0045] like Figure 1 , Figure 3 as well as Figure 5 As shown, the solar cell panel 50 is a sheet-like component provided in a thin sheet shape. The solar cell panel 50 is provided in a circular ring shape (ring shape) having its imaginary center position, and its imaginary center position refers to the center of the area surrounded by the solar cell panel 50. Hereinafter, the imaginary center position is also referred to as the center of the solar cell panel 50. The solar cell panel 50 is placed on the first configuration area 33 of the main board 20 around the spacer 40. The first protrusions 32 are arranged along the inner circumference of the solar cell panel 50, and the inner circumference of the solar cell panel 50 contacts the first protrusions 32. The first protrusions 32 become a standard or reference for configuring the solar cell panel 50, and the position of the solar cell panel 50 in the radial direction relative to the main board 20 is determined by the first protrusions 32. That is, the position of the solar cell panel 50 is restricted by the first protrusions 32. The position of the solar cell panel 50 in the circumferential direction cannot be determined only by the first protrusions 32. There may also be a gap between the inner circumference of the solar cell panel 50 and at least one of the first protrusions 32. The solar cell panel 50 may also be bonded to the first configuration area 33 by a double-sided tape.

[0046] The solar cell panel 50 has one or more photovoltaic power elements that generate electromotive force by receiving light. The solar cell panel 50 is electrically connected to the circuit substrate 10 via contacts, etc., and the electromotive force of the solar cell panel 50 is supplied to the circuit substrate 10 or charged to the secondary battery.

[0047] The solar cell panel 50 has a plurality of sheet-like extensions 51a and 51b extending radially inward from its inner circumference. In the present embodiment, the number of the extensions 51a and 51b is two, but it may be three or more, or it may be one. The first extension 51a and the second extension 51b are arranged approximately symmetrically with respect to the center of the solar cell panel 50 and the main board 20. The first extension 51a is placed on the first extension 34a of the first arrangement area 33, and the second extension 51b is placed on the second extension 34b of the first arrangement area 33.

[0048] The solar panel 50 has a circular hole 58 formed in the second extension portion 51b. The hole 58 penetrates from the surface of the second extension portion 51b to the back surface. The position of the solar panel 50 is determined by inserting the boss 38 into the hole 58. In particular, after the position of the solar panel 50 in the radial direction is determined by the first protrusion 32 (after the position of the solar panel 50 is restricted by the first protrusion 32), the position in the circumferential direction is determined by the boss 38 and the hole 58. However, the solar panel 50 may rotate around the boss 38 only by the first protrusion 32, the boss 38 and the hole 58, so the rotation stop is achieved by the second protrusion 39 and the hole 59 described later.

[0049] The thickness of the solar cell panel 50 is thinner than the height from the first arrangement region 33 to the top of the boss 38 , and the boss 38 passes through the hole 58 and protrudes from the surface of the solar cell panel 50 .

[0050] The solar panel 50 has an arc-shaped hole 59 formed in the first extension 51a. The hole 59 penetrates from the surface of the first extension 51a to the back surface. The hole 59 and the hole 58 are arranged approximately symmetrically with respect to the center of the solar panel 50 and the main board 20. The second protrusion 39 is inserted into the hole 59. Since the hole 59 and the second protrusion 39 are arc-shaped, the radial and circumferential positions of the solar panel 50 relative to the main board 20 are determined by inserting the second protrusion 39 into the hole 59. By inserting the second protrusion 39 into the hole 59, the rotation of the solar panel 50 around the boss 38 with the boss 38 as the center is stopped. Even if the fitting tolerance between the hole 59 and the second protrusion 39 is gentle, since the fitting tolerance between the hole 58 and the boss 38 is stricter than the fitting tolerance between the hole 59 and the second protrusion 39, the radial and circumferential positions of the solar cell panel 50 relative to the main board 20 are firmly determined by fitting the second protrusion 39 into the hole 59 and the boss 38 into the hole 58. That is, the solar cell panel 50 is positionally restricted and positioned by the second protrusion 39.

[0051] The thickness of the solar cell panel 50 is thinner than the height from the first configuration area 33 to the top of the second protrusion 39, and the second protrusion 39 passes through the hole 59 and protrudes from the surface of the solar cell panel 50. The thickness of the solar cell panel 50 is thinner than the height from the first configuration area 33 to the top of the first protrusion 32.

[0052] The solar cell panel 50 has a rectangular opening 52. The opening 52 passes through from the front surface to the back surface of the solar cell panel 50. The date display plate 90 is fitted into the opening 52.

[0053] In the case where the solar cell panel 50 is a gallium solar cell having high power generation efficiency, it is expected that the solar cell panel 50 will generate sufficient power even if the light receiving area of ​​the solar cell panel 50 is small. Figure 8 or Fig. 9 As shown, the solar cell panel 50 may be arranged in an arc shape lacking a ring, such as a C-shape or a semi-ring shape. Figure 8 As shown, an arc-shaped decorative sheet 150 having a color substantially the same as that of the solar cell panel 50 may be arranged in the missing portion, and the arc-shaped solar cell panel 50 and the decorative sheet 150 may be combined to form a circular ring shape. In this case, the solar cell panel 50 and the decorative sheet 150 have substantially the same thickness. Furthermore, in order to make the boundary between the arc-shaped solar cell panel 50 and the decorative sheet 150 inconspicuous, a circular ring-shaped light diffusion sheet may be overlapped on the surface of the arc-shaped solar cell panel 50 and the decorative sheet 150.

[0054] When the solar cell panel 50 is in an arc shape, Figure 8 or Fig. 9 As shown, the number of the extension portion 51b of the solar cell panel 50 is 1. Figure 8 As shown, when the decorative sheet 150 is provided, the decorative sheet 150 has a sheet-shaped extension portion 151 extending radially inward from its inner circumference, and the position of the extension portion 151 is the same as that of the aforementioned extension portion 51a. Figure 8 In the example shown, the hole 159 into which the second protrusion 39 is inserted is formed in the extension portion 151 of the decorative sheet 150. Figure 8 In the example shown, the number of the second protrusions 39 is two, and these second protrusions 39 are arranged approximately symmetrically with respect to the center of the solar cell panel 50 and the main board 20. Figure 8 In the example shown, in addition to the hole 58 in which the boss 38 is inserted, a hole 59 in which the second protrusion 39 is inserted is formed in the extension portion 51b of the solar cell panel 50. Fig. 9 In the example shown, the number of the second protrusion 39 is one, and the second protrusion 39 does not help in positioning the solar cell panel 50 .

[0055] (7) Date wheel

[0056] like Figure 1 , Figure 4 as well as Figure 5 As shown, the date wheel 60 is an annular member, and the shape of the date wheel 60 is based on a circular ring (ring shape) around the central axis passing through the center of the main board 20. The date wheel 60 is supported by the first protrusion 32 and the second protrusion 39 in a state of floating from the solar panel 50. Therefore, when the date wheel 60 is rotated, no friction is generated between the date wheel 60 and the solar panel 50. Since the radial width of the arc-shaped second protrusion 39 is smaller than the radial width of the date wheel 60, the friction generated between the second protrusion 39 and the date wheel 60 is small. Similarly, the radial width of the arc-shaped first protrusion 32 is smaller than the radial width of the date wheel 60. In addition, the radial width of the date wheel 60 refers to the width from the inner circumference to the outer circumference of the date wheel 60. The radial width of the second protrusion 39 refers to the dimension from the radial inner edge to the radial outer edge of the second protrusion 39. The radial width of the first protrusion 32 refers to the dimension from the radial inner edge to the radial outer edge of the first protrusion 32.

[0057] The date wheel 60 is made of a metal material such as stainless steel or titanium alloy. The date wheel 60 is a component that has been subjected to a cutting process such as mechanical cutting, stamping, etching, laser beam irradiation cutting, sandblasting, or water jet processing. The metallic luster of the date wheel 60 gives the date wheel 60 a sense of heaviness and luxury. The cutting process gives the date wheel 60 a three-dimensional sense and a sense of luxury.

[0058] The date wheel 60 includes an inner ring 61, an outer ring 62, a plurality of spokes 63, a plurality of openings 64, a plurality of text portions 65, and an inner gear 66. The inner ring 61 is arranged inwardly away from the outer ring 62, and the inner ring 61 is concentric with the outer ring 62. The inner ring 61 is a portion close to the inner circumference of the date wheel 60. A plurality of spokes 63 are arranged at intervals in the circumferential direction between the inner ring 61 and the outer ring 62. These spokes 63 extend in the radial direction and are bridged between the inner ring 61 and the outer ring 62. The openings 64 are formed between adjacent spokes 63. The openings 64 penetrate from the surface of the date wheel 60 to the back. The openings 64 allow sunlight to pass to the solar panel 50. The text portions 65 are arranged in each opening 64. The text portions 65 are connected to the inner ring 61, the outer ring 62, or the spokes 63 through a thin connecting rod. The inner gear 66 is formed on the inner circumference of the inner ring 61. The internal gear 66 meshes with the output gear 24 a of the gear train mechanism 24 .

[0059] The inner circumference of the date indicator 60, that is, the inner ring 61, is placed on the first protrusions 32 and the second protrusions 39 and contacts the first protrusions 32 and the second protrusions 39. Therefore, the resistance torque applied to the date indicator 60 from the first protrusions 32 and the second protrusions 39 is suppressed to a minimum. Since the first protrusions 32 and the second protrusions 39 are arc-shaped, the contact area of ​​the first protrusions 32 and the second protrusions 39 and the inner ring 61 of the date indicator 60 is suppressed to a minimum, and the resistance torque applied to the date indicator 60 from the first protrusions 32 and the second protrusions 39 is suppressed to a minimum.

[0060] Any one of the character portions 65 of the date indicator 60 overlaps with the date display plate 90. The character portion 65 overlapping with the date display plate 90 indicates the current date.

[0061] (8) Date wheel press

[0062] like Figure 1 , Figure 4 as well as Figure 5 As shown, the date wheel pressing member 70 overlaps with the spacer 40. The date wheel pressing member 70 is set in a disc shape. The outer periphery of the date wheel pressing member 70 is covered by the internal gear 66 of the date wheel 60 from the windshield side. The outer periphery of the date wheel pressing member 70 is separated from the internal gear 66, or is in soft contact with the internal gear 66. Soft contact means that the outer periphery of the date wheel pressing member 70 is in contact with the internal gear 66 to such an extent that the outer periphery of the date wheel pressing member 70 and the date wheel 60 hardly generate friction.

[0063] The date wheel pressing member 70 extends from the edge of the spacer 40 and the second configuration area 35 toward the expansion portion 34. The extended portion floats from the expansion portion 34. The extended portion covers the extension portions 51a and 51b of the solar panel 50 from the windshield side and presses the extension portions 51a and 51b. As described above, the height of the surface of the solar panel 50 is consistent with that of the surface of the spacer 40. Therefore, even if the date wheel pressing member 70 overlaps with the spacer 40 and the extension portion 51 of the solar panel 50, the date wheel pressing member 70 will not shake.

[0064] (9) Dial

[0065] like Figure 1 As shown, the dial 80 overlaps with the date wheel pressing piece 70 and the date wheel 60. The dial 80 is supported by the date wheel pressing piece 70, whereby the dial 80 moves away from the date wheel 60 toward the windshield side. The dial 80 is made of a metal material or a resin material. The dial 80 is opaque. The dial 80 has a plurality of openings 81 arranged circumferentially at a position radially outward from the outer periphery of the date wheel pressing piece 70. The openings 81 pass through from the surface of the dial 80 to the back. These openings 81 allow sunlight to pass to the date wheel 60 and the solar panel 50. By forming the openings 81 on the dial 80, the dial 80 can be seen in three dimensions. In addition, the dial 80 may also be transparent. In this case, the openings 81 may not be formed on the dial 80.

[0066] <4. Conclusion>

[0067] Since the arc-shaped first protrusion 32 is arranged along the outer circumference of the sheet-shaped solar cell panel 50, the radial position of the solar cell panel 50 is restricted by the first protrusion 32. In addition, since the arc-shaped second protrusion 39 is embedded in the hole 59 of the solar cell panel 50, the solar cell panel 50 is radially and circumferentially restricted and positioned by the second protrusion 39. Since the first protrusion 32 and the second protrusion 39 support the date wheel 60, the friction generated relative to the date wheel 60 when the date wheel 60 rotates is reduced.

[0068] The solar panel 50 is placed on the first configuration surface 53 of the surface of the main board 20. The second protrusion 39 is formed on the surface of the main board 20, and the hole 59 is formed on the solar panel 50, and the second protrusion 39 is inserted into the hole 59. The date wheel 60 is supported by the second protrusion 39 from below. Therefore, the second protrusion 39 has both the function of positioning the solar panel 50 and the function of supporting the date wheel 60. This eliminates the need to prepare a protrusion for positioning the solar panel 50 and a protrusion for supporting the date wheel 60 on the surface of the main board 20. That is, even if there is no margin for preparing a protrusion for positioning the solar panel 50 and a protrusion for supporting the date wheel 60 on the surface of the main board 20, both positioning the solar panel 50 and supporting the date wheel 60 can be achieved by the second protrusion 39.

[0069] Although the radial position of the solar cell panel 50 is determined only by the first protrusion 32 (although the position of the solar cell panel 50 is restricted by the first protrusion 32), the circumferential position cannot be determined. Even if the fitting tolerance between the boss 38 and the hole 58 is strict, the solar cell panel 50 rotates around the boss 38 with the boss 38 as the center only by the boss 38 and the hole 58. Although the circumferential and radial positions of the solar cell panel 50 are determined by fitting the second protrusion 39 into the hole 59, if the fitting tolerance between the second protrusion 39 and the hole 59 is gentle, the position of the solar cell panel 50 may be shifted only by the second protrusion 39 and the hole 59. Even so, by adopting the fitting of the second protrusion 39 into the hole 59, the fitting of the boss 38 into the hole 58, and the contact of the first protrusion 32 with the outer periphery of the solar cell panel 50, the position of the solar cell panel 50 is firmly determined, and the position shift and shaking of the solar cell panel 50 are not generated.

[0070] The first protrusion 32 and the third protrusion 39 do not contact the tooth tops of the internal gear 66 of the date indicator 60, and support the date indicator 60 from below. Therefore, the friction generated between the date indicator 60 and the first protrusion 32 and the third protrusion 39 when the date indicator 60 rotates can be reduced.

[0071] The inner ring 61, which is a portion of the annular date wheel 60 near the inner periphery, is supported by the first protrusion 32 and the third protrusion 39. Thus, the contact area between the first protrusion 32 and the third protrusion 39 and the date wheel 60 is minimized, and the friction generated between the first protrusion 32 and the third protrusion 39 and the date wheel 60 is minimized. In addition, the torque of the output gear 24a required to rotate the date wheel 60 can be suppressed.

[0072] The first protrusion 32 and the third protrusion 39 are formed in an arc shape so as to extend in the circumferential direction, and the width of the first protrusion 32 and the third protrusion 39 in the radial direction is smaller than the width from the inner circumference to the outer circumference of the date wheel 60. Thus, the contact area between the first protrusion 32 and the third protrusion 39 and the date wheel 60 can be suppressed to a minimum, and the friction generated between the first protrusion 32 and the third protrusion 39 and the date wheel 60 can be reduced.

[0073] The holes 58 and the holes 59 are arranged approximately symmetrically with respect to the center of the solar panel 50 and the main board 20, and the bosses 38 and the third protrusions 39 are arranged approximately symmetrically with respect to the center of the solar panel 50 and the main board 20. Therefore, the solar panel 50 can be stably fixed.

[0074] The circular boss 38 is formed on the surface of the main board 20, and the circular hole 58 is formed in the solar panel 50. The boss 38 is inserted into the hole 58. In addition, by inserting the third protrusion 39 into the hole 59, the rotation displacement (positioning) of the solar panel 50 around the boss 38 can be prevented.

[0075] Since the fitting tolerance between the hole 58 and the boss 38 is strict, the position of the solar panel 50 is strictly determined, and the fitting tolerance between the hole 59 and the third protrusion 39 is loose, so that the third protrusion 39 is reliably embedded in the hole 59. The solar panel 50 is strictly positioned and the rotation of the solar panel 50 is stopped.

[0076] The planar shape of the pair of guide portions 94 and the pair of guide portions 95 combined is a rectangular frame with four corners cut off. Therefore, when the date display plate 90 is attached, the guide portions 94 and 95 and the adhesive portion 96 can be easily fitted into the recessed portion 91.

[0077] <5. Modifications>

[0078] (1) The electronic watch 1 may also include a magnetic shielding plate having the same planar shape as that of the solar panel 50. The magnetic shielding plate is a sheet-like component, and the magnetic shielding plate is placed in the first arrangement area 33 of the main board 20 instead of the solar panel 50. Therefore, the third protrusion 39 is inserted into the hole formed in the first extension of the magnetic shielding plate, and the boss 38 is inserted into the hole formed in the second extension of the magnetic shielding plate. The hole formed in the first extension of the magnetic shielding plate is equivalent to the hole 59 of the solar panel 50, and the hole formed in the second extension of the magnetic shielding plate is equivalent to the hole 58 of the solar panel 50. The magnetic shielding plate is made of a magnetic collecting material such as cold-rolled steel or permalloy, and the magnetic shielding plate covers the motor 21, thereby magnetically shielding the motor 21. In addition, if the magnetic shielding plate and the solar panel 50 are thin, both the solar panel 50 and the magnetic shielding plate may be used, and the magnetic shielding plate may be placed in the first arrangement area 33 of the main board 20, and the solar panel 50 may be placed on the magnetic shielding plate. Even when both the solar panel 50 and the anti-magnetic plate are used, the boss 38 is embedded in both the hole 58 of the solar panel 50 and the hole of the anti-magnetic plate, and the third protrusion 39 is embedded in both the hole 59 of the solar panel 50 and the hole of the anti-magnetic plate.

[0079] (2) Figure 1 to Figure 3 As shown, one third protrusion 39 is formed on the surface of the main board 20. In contrast, a plurality of third protrusions 39 may be formed on the surface of the main board 20. In this case, the solar cell panel 50 has a plurality of first extensions 51a, a plurality of holes 59 are formed in the plurality of first extensions 51a, and a plurality of third protrusions 39 are respectively embedded in the plurality of holes 59. Alternatively, a plurality of holes 59 are formed in one first extension 51a of the solar cell panel 50, and a plurality of third protrusions 39 are respectively embedded in the plurality of holes 59.

[0080] (3) The above-mentioned change points (1) and (2) may be applied in combination.

[0081] The above describes the embodiments and their variations, but the technical scope of the present invention is not limited to the above embodiments or variations, but is determined based on the description of the claims. Furthermore, the equivalent scope of the claims to which changes irrelevant to the essence of the present invention are added is also included in the technical scope of the present invention.

Claims

1. An electronic watch, characterized in that: have: A rotatable annular member; a substrate having at least one protrusion; and a sheet-like member disposed between the base material and the annular member, The sheet-like member is restricted in position by the at least one protrusion, The annular member is supported by the protrusion.

2. The electronic watch according to claim 1, characterized in that: The dimension of the protrusion in the radial direction perpendicular to the rotation axis of the annular member is smaller than the width from the inner periphery to the outer periphery of the annular member.

3. The electronic watch according to claim 1 or 2, characterized in that: The at least one protrusion is arranged at a position corresponding to a region of the inner circumference of the annular member.

4. The electronic watch according to any one of claims 1 to 3, characterized in that: The annular member is configured not to come into contact with the sheet member by being supported by the at least one protrusion.

5. The electronic watch according to any one of claims 1 to 4, characterized in that: The at least one protrusion is formed in an arc shape with respect to the center of the annular member.

6. The electronic watch according to any one of claims 1 to 5, characterized in that: The protrusion has: a first protrusion that determines the position of the sheet member in a radial direction perpendicular to the rotation axis of the annular member; and The second protrusion determines the position of the sheet member in the circumferential direction around the rotation axis of the annular member and in the radial direction.

7. The electronic watch according to claim 6, characterized in that: The sheet-like component has a hole, The sheet member is positioned relative to the base material by fitting the second protrusion into the hole.

8. The electronic watch according to claim 7, characterized in that: The substrate has a boss, The sheet-like component has a hole corresponding to the boss, The boss is fitted into the hole, so that the sheet member is positioned relative to the base material.

9. The electronic watch according to claim 8, characterized in that: The second protrusion and the boss are arranged at positions substantially symmetrical to each other with respect to the imaginary center position of the sheet member.

10. The electronic watch according to any one of claims 1 to 9, characterized in that: A pressing member for pressing the annular member is provided, The sheet-like component has an annular region and an extension portion extending from the annular region. The extending portion is pressed by the pressing member.

11. The electronic watch according to claim 8, characterized in that: A pressing member for pressing the annular member is provided, The sheet-like component has: Ring-shaped area; A first extension portion extending from the annular region at a position corresponding to the second protrusion and the hole; and a second extension portion extending from the annular region at a position corresponding to the boss and the hole, The first extending portion and the second extending portion are pressed by the pressing member.

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