Electronic instrument, and electronic timepiece

Abstract

To enable making a component member common in a plurality of models while cutting down manufacturing costs.SOLUTION: Timepieces 100 and 200 serving as an electronic instrument comprise: a base 2 that has a first loading part 21 having a principal plane 21a almost annually provided, a second loading part 22 having a principal plane 22a provided inside relative to the first loading part 21 and a protrusion part 221 protruding upward, and an outer periphery side loading part 23 serving as a third loading part provided around the first loading part 21, in which heights of the principal plane 22a of the second loading part 22 and the protrusion part 221 are lower than a principal plane 23a of the outer periphery side loading part 23 serving as the third loading part, and higher than the principal plane 21a of the first loading part 21; and an almost annular day wheel 3 that is small in a thickness dimension than a difference between a height of the protrusion part 221 of the second loading part 22 and the height of the principal plane 23a of the outer periphery side loading part 23 serving as the third loading part, and has at least a part of an inner circumferential side arranged in the second loading part 22.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to an electronic device and an electronic timepiece. [Background technology]

[0002] Conventionally, electronic devices such as electronic watches have come in a variety of shapes and functions, and mounting different modules on a wide variety of products would increase manufacturing costs, which is undesirable. In this regard, Patent Document 1 describes a watch that can accommodate changes to the planar shape or dimensions of the device case or dial by simply changing the shape and dimensions of the support member, without changing the module (referred to as the "internal structure" in Patent Document 1).

[0003] Electronic devices equipped with solar panels (solar cells) that receive light and generate electricity are also known. In this case, there is a demand for solar panels with different shapes and positions depending on the model, due to the need to accommodate the external design of the electronic device and the amount of power generation required for the electronic device, etc. Even in such cases, it is preferable to reduce manufacturing costs by sharing parts as much as possible. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-013268 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, while the watch described in Patent Document 1 describes how, when changing the exterior case, dial, etc., it is possible to change only the shape and dimensions of the support members without having to change the shape and dimensions of the internal structure such as the watch movement, Patent Document 1 deals with this by providing an attachment for supporting the members each time, so it is necessary to finely adjust the shape of the support members for each device (model), which is undesirable in terms of design effort and manufacturing costs, etc.

[0006] The present invention has been made in consideration of the above circumstances, and has as its object to provide an electronic device and an electronic timepiece that enable components to be standardized among a plurality of models while keeping manufacturing costs down. [Means for solving the problem]

[0007] In order to solve the above problems, the electronic device according to the present invention comprises: a base including a first mounting portion having a substantially annular main surface, a second mounting portion disposed inside the first mounting portion and having a main surface and a protruding portion protruding upward, and a third mounting portion disposed around the first mounting portion, the main surface and the protruding portion of the second mounting portion being lower than the main surface of the third mounting portion and higher than the main surface of the first mounting portion; The present invention is characterized by having a substantially annular date wheel whose thickness dimension is smaller than the difference between the height of the protruding portion of the second mounting portion and the height of the main surface of the third mounting portion, and at least a portion of its inner circumference is positioned on the second mounting portion. Effect of the Invention

[0008] According to the present invention, components can be standardized among a plurality of models while suppressing manufacturing costs. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is an exploded oblique view of the main parts of a timepiece of a "first model" according to an embodiment. [Diagram 2] This is a side cross-sectional view of the main parts of the "first model" watch. [Diagram 3]This is a cross-sectional oblique view of the main parts of the "first model" watch. [Figure 4] FIG. 2 is an exploded oblique view of the main parts of a timepiece of a “second model” in an embodiment. [Diagram 5] A side cross-sectional view of the main parts of the "second model" watch. [Figure 6] This is a cross-sectional oblique view of the main parts of the "second model" watch. [Figure 7] FIG. 2 is a perspective view of the front surface side of the base in the embodiment. [Figure 8] 8 is an enlarged perspective view of a main part of the base shown in FIG. 7. [Figure 9] FIG. 11 is a perspective view showing a state in which a date indicator and a date indicator holder are assembled to the surface of a base in an embodiment. [Figure 10] 10 is a perspective view showing a state in which a substantially circular solar panel is attached to the surface of the base in the state shown in FIG. 9. FIG. [Figure 11] 4 is a perspective view of the rear surface side of the peripheral frame in the embodiment. FIG. [Figure 12] 12 is a perspective view of the rear surface of the peripheral frame shown in FIG. 11 with a substantially circular solar panel attached thereto. [Figure 13] This is a side cross-sectional view of the main part of the contact portion between the solar panel and the circuit board in the "first model" watch. [Figure 14] This is a side cross-sectional view of the main part of the contact portion between the solar panel and the circuit board in the "second model" watch. [Figure 15] FIG. 11 is a side cross-sectional view of a main part of a conventional timepiece. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] BEST MODE FOR CARRYING OUT THE PRESENTLY PREFERRED EMBODIMENTS Hereinafter, an embodiment of an electronic device and an electronic timepiece according to the present invention will be described with reference to FIGS. In addition, the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples. In this embodiment, a case will be described in which the electronic device is an electronic clock (hereinafter simply referred to as a "clock") that displays time.

[0011] The timepiece, which is an electronic device in this embodiment, includes at least a base 2, an outer peripheral frame 6, a date dial 3, etc., and ensures space above and below the date dial 3 in which solar panels 5 can be installed. This makes it possible to accommodate a number of models with different shapes and arrangement positions of the solar panels 5, while using a common base 2 and peripheral frame 6, etc. That is, in the embodiment, when realizing a model in which the solar panel 5 is placed above the date dial 3 (this will be referred to as the "first model" watch 100) and a model in which the solar panel 5 is placed below the date dial 3 (this will be referred to as the "second model" watch 200), at least the base 2 and the outer frame 6 can be made common.

[0012] In both the "first model" watch 100 and the "second model" watch 200, the various parts that make up the watches 100, 200, such as the circuit board 1, base 2, date wheel 3, solar panel 5, and peripheral frame 6, are assembled into a module and housed in an equipment case (not shown). The equipment case is made of, for example, metals such as stainless steel or titanium, ceramics, various synthetic resins, and the like. Note that the materials that make up the equipment case are not limited to those exemplified here. The device case is formed in a hollow short column shape. The front side of the timepiece 100, 200 in the device case (the viewing side of the timepiece) is closed by a windshield member (not shown) made of transparent resin, glass, etc. The back side of the timepiece 100, 200 in the device case is closed by a back cover (not shown). A watch band (not shown) is attached to the device case, allowing the watch 100, 200 to be worn on the user's wrist.

[0013] There are no particular limitations on the specific shape and configuration of the device case that forms the exterior of the timepieces 100, 200, and these are set appropriately according to the design and specifications. In the drawings showing the embodiments, the device cases of the timepieces 100, 200 are omitted, and only the internal configuration (also called a module) housed within the hollow portion of the device case is shown.

[0014] 1 to 3 are diagrams showing a "first model" timepiece 100 (the internal configuration (modules) of the timepiece 100). Fig. 1 is an exploded perspective view showing the internal structure of the main parts of the timepiece of the "first model", Fig. 2 is a side cross-sectional view of the main parts of the internal structure of the timepiece of the "first model" assembled with the parts shown in Fig. 1, and Fig. 3 is a cross-sectional perspective view of the main parts of the internal structure of the timepiece of the "first model". Note that the dial 7 is omitted in Fig. 3. As shown in FIGS. 1 to 3, the “first model” watch 100 is equipped with a solar panel 51 having a substantially circular shape as the solar panel 5.

[0015] 4 to 6 are diagrams showing a "second model" watch 200 (the internal configuration (module) of watch 200). FIG. 4 is an exploded perspective view showing the internal configuration of the main parts of the "second model" watch, FIG. 5 is a side cross-sectional view of the main parts of the internal configuration of the "second model" watch in which the parts shown in FIG. 4 are assembled, and FIG. 6 is a cross-sectional perspective view of the main parts of the internal configuration of the "second model" watch. As shown in FIGS. 4 to 6, the “second model” watch 200 is equipped with a substantially annular solar panel 52 as the solar panel 5.

[0016] In the following embodiments, in common to the "first model" and "second model" in Fig. 1, Fig. 2, Fig. 4, and Fig. 5, the upper side of the axial direction L (see Fig. 1, Fig. 2, Fig. 4, and Fig. 5) is the "front side (viewing side)" and the lower side is the "back side (non-viewing side)." The "axial direction L" is the direction along the axis of the analog watch ("axis 25" in Fig. 2, Fig. 5, etc.). In the following, the side facing the side of the device case (not shown) will be referred to as the "outer" or "outer circumference" side, and the side toward the center of the timepiece 100, 200 where the pointer axis 25 (see Figures 2 and 5, etc.) is provided will be referred to as the "inner" or "inner circumference" side.

[0017] [composition] First, the "first model" watch 100 (the internal configuration (module) of the watch 100) will be described with reference to Figs. 1 to 3 etc. As shown in FIG. 1, the "first model" watch 100 (internal configuration (module) of watch 100) includes, in order along the axial direction L from the back side (lower side) to the front side (upper side) of watch 100, a circuit board 1, a base 2, a solar panel 5 (a roughly circular solar panel 51), an outer peripheral frame 6, a dial 7, etc. Various electronic components, such as an antenna 11, a secondary battery 12 (see FIG. 2), and, although not shown, an IC (Integrated Circuit) chip, terminals, etc., are mounted on the circuit board 1. A terminal portion 13 on the circuit board 1 side is provided at a position corresponding to a terminal portion 55 of a solar panel 5, which will be described later.

[0018] The base 2 is made of, for example, various types of resin, and is a base member (main plate) on which the various members that make up the watch 100 (the module of the watch 100) are attached. As shown in Figure 1 etc., the base 2 is placed on top of the circuit board 1 (front side). Various structural parts (neither of which are shown) such as a motor (not shown) and a gear train mechanism for transmitting the power of the motor to the hands (not shown) and date wheel 3 are appropriately distributed and arranged on the front and back (the visible and non-visible sides of the timepiece) of the base 2. In addition, a crown (not shown) is provided as an operating part on a side part such as the 3 o'clock side of the timepiece 100, and a winding core 26 (see Figures 9 and 10) that is connected to an internal structural part (not shown) is attached to the side part of the base 2 in a position corresponding to the crown. Furthermore, as will be described later, a date indicator 3 (a first date indicator 31 in FIG. 1 etc.) and a date indicator holder 4 and the like are provided on the top (front side) of the base 2.

[0019] FIG. 7 is a perspective view of the base of the present embodiment, and FIG. 8 is an enlarged perspective view of a main part of the base shown in FIG. 7, the base 2 is made of resin or the like and is generally disk-shaped, with an axis hole 24 provided in the center through which the pointer shaft 25 is inserted. The base 2 has a first mounting portion 21 which is a base mounting portion having a principal surface 21a provided in a generally annular shape, a second mounting portion 22 provided on the inside of the first mounting portion 21, and an outer circumferential mounting portion (third mounting portion) 23 provided around the first mounting portion 21.

[0020] Here, the "principal surface" refers to a surface that serves as a reference in the first placement portion 21, etc. For example, the first placement portion 21 has a part that is recessed and low, and a part that protrudes, and has unevenness as a whole. Even in this case, the surface that mainly supports the plate-like member placed on the first placement portion 21 is the "principal surface 21a" of the first placement portion 21. The "principal surfaces" of the second placement portion 22 and the outer peripheral placement portion 23 (i.e., the "principal surface 22a" of the second placement portion 22 and the "principal surface 23a" of the outer peripheral placement portion 23) have the same meaning. The principal surface 23a of the outer peripheral placement portion 23, which is the third placement portion, is provided so as to include a substantially arc-shaped surface.

[0021] In the embodiment, the height (height in the direction along the axial direction L) of the main surface 22a of the second mounting portion 22 of the base 2 is lower than the main surface 23a of the outer periphery side mounting portion 23 and higher than the main surface 21a of the first mounting portion 21. 7 and 8, the main surface 21a of the first mounting portion 21 is shown shaded in gray. As shown in Fig. 7 and 8 (particularly Fig. 8), the main surface 21a of the first mounting portion 21, which is provided in a substantially annular shape, is one step lower than the main surface 22a of the second mounting portion 22, which is provided on the inside of the first mounting portion 21.

[0022] As shown in Figs. 7 and 8, the second mounting portion 22 is provided with a protruding portion 221 at the boundary with the first mounting portion 21, the protruding portion 221 being higher than the main surface 22a of the second mounting portion 22. The protruding portion 221 is a portion on which at least a part of the inner circumference side (inner circumference portion 313, see Fig. 9) of the date wheel 3 (first date wheel 31) described later is placed, and the upper surface of the protruding portion 221 is provided so as to include a substantially arc-shaped surface. In other words, the protruding portion 221 in the embodiment is arranged in a partially interrupted arc shape. The protruding portion 221 may be provided in a substantially uninterrupted ring shape at the boundary between the first mounting portion 21 and the second mounting portion 22. The entire second mounting portion 22 (main surface 22a of the second mounting portion 22) may be formed to be at the same height as the protruding portion 221. The protruding portions 221 support the inner circumference side of the date indicator 3 (first date indicator 31) at approximately equal intervals in a well-balanced manner, so that the date indicator 3 (first date indicator 31) is placed on the second mounting portion 22 without tilting.

[0023] The protruding portion 221 does not necessarily have to be provided on the second mounting portion 22, but may be provided on the first mounting portion 21 as long as it is at a position corresponding to the outer periphery (boundary) of the second mounting portion 22 which is substantially circular. Furthermore, the substantially circular date indicator holder 4 needs to hold down the inner circumference of the substantially annular date indicator 3. For this reason, it is preferable that the second mounting portion 22 on which members such as the date indicator holder 4 are placed is substantially circular, and it is preferable in terms of arrangement and ease of processing that the protruding portion 221 is provided on the outer circumference of the second mounting portion 22 (the boundary with the first mounting portion 21). However, if the protruding portion 221 cannot be provided on the second mounting portion 22 or in the vicinity of the second mounting portion 22 due to the arrangement of various components such as a motor (not shown), an auxiliary protruding portion 211 having an upper surface at the same height as the upper surface of the protruding portion 221 may be provided on the first mounting portion 21 as an auxiliary, as shown in FIG.

[0024] 7. FIG. 9 is a perspective view showing a state in which the first date indicator and the date indicator holder are assembled on the upper (front side) surface of the base shown in FIG. As shown in Fig. 9, the date indicator 3 (first date indicator 31) is formed in a substantially annular shape, and is positioned below the outer peripheral frame 6. As described above, at least a portion of the inner periphery side (inner periphery portion 313) of the date indicator 3 (first date indicator 31) is positioned on the second mounting portion 22 (in the embodiment, the protruding portion 221 of the second mounting portion 22). The material from which the date indicator 3 (first date indicator 31) is formed is not particularly limited, but it is formed, for example, from a metal such as stainless steel (SUS) or titanium.

[0025] The date wheel 3 (first date wheel 31) has a substantially annular main body 311 and an inner circumference portion 313 which is the inner circumference portion of the main body 311. Numbers and the like indicating the date (referred to as character portion 312) are provided on the surface of the main body 311. The character portion 312 may be provided two-dimensionally by printing or the like, or may be provided three-dimensionally by cutting or adhering cut-out character shapes or the like onto the main body portion 331. Furthermore, a tooth portion (gear portion) 35 is formed along the circumferential direction on the inner circumference side of the inner circumference portion 313 (see FIG. 9).

[0026] A gear 27 that meshes with at least the toothed portion (gear portion) 35 of the date wheel 3 (first date wheel 31) is exposed on the main surface 22a of the second mounting portion 22. The gear 27 constitutes a gear train mechanism (not shown) that rotates the substantially annular date wheel 3 (first date wheel 31) in the circumferential direction. The main body of the gear train mechanism that rotates the date wheel 3 (first date wheel 31) and a motor for operating this (neither of which are shown) may be attached to the back side of the base 2.

[0027] In addition, a date indicator holder 4 that suppresses the floating of the date indicator 3 (first date indicator 31) is arranged on the main surface 22a of the second mounting portion 22. The date indicator holder 4 is a substantially disk-shaped member that is arranged inside the substantially annular date indicator 3 (first date indicator 31) (inside the protruding portion 221, which is the portion on which at least a portion of the inner circumference side of the date indicator 3 (first date indicator 31) is placed). The date indicator holder 4 has a roof portion 41 that extends above at least a portion of the inner circumference side of the date indicator 3. It is arranged so as to cover the upper portion of the inner circumference side of the date indicator 3 (first date indicator 31) to the extent that it does not interfere with the tooth portion (gear portion) 35 of the date indicator 3 (first date indicator 31). In this way, the date indicator holder 4 suppresses the floating of the date indicator 3 (first date indicator 31) without impeding its rotation. In addition, a magnetic shield (not shown) or the like may be disposed on the main surface 22a of the second mounting portion 22. When a magnetic shield is provided, it is disposed at a position where it can at least cover the motor, and the motor is magnetically shielded by the magnetic shield.

[0028] Furthermore, the outer peripheral mounting portion 23 of the base 2 is capable of arranging at least a part of the solar panel 5 (approximately circular solar panel 51) provided at a height position between the outer peripheral frame 6 and the date wheel 3 (first date wheel 31). That is, as shown in Figures 1 to 3, in the "first model" timepiece 100, the solar panel 5 (approximately circular solar panel 51) is arranged in the space above the date wheel 3 (first date wheel 31). The solar panel 5 has one or more photovoltaic elements that receive light and generate electromotive force.

[0029] FIG. 10 is a perspective view showing a state in which a substantially circular solar panel is placed on the upper (front) surface of the base in the state shown in FIG. As shown in Figures 1 and 10, the approximately circular solar panel 51 provided on the "first model" watch 100 is a thin, disk-shaped member, and has an axial hole 511, through which the pointer shaft 25 is inserted, formed approximately in the center corresponding to the axial hole 24 of the base 2 (see Figure 7). Further, a small window 512 is formed at the 3 o'clock position in the analog timepiece, and the character portion 312 of the date indicator 3 (first date indicator 31) corresponding to the date display is exposed through the small window 512.

[0030] 10, the substantially circular solar panel 51 has an outer periphery 513 that does not contribute to power generation on its outer periphery, and this outer periphery 513 is mounted on the main surface 23a of the outer periphery-side mounting portion 23. In the example shown in FIG. 1 etc., the outer periphery 513 is provided on a part of the outer periphery of the substantially circular solar panel 51, but the range, size, shape, etc. of the outer periphery 513 are not limited to the illustrated example. The outer periphery 513 may be provided on the entire outer periphery of the substantially circular solar panel 51, for example.

[0031] An extension portion 515 that extends outward is formed on a part of the outer periphery portion 513, and a terminal portion 55 is provided on the back side of the extension portion 515. A contact member 15 is connected from below to a position corresponding to the terminal portion 55. The contact member 15 is, for example, a coil spring made of a conductor, and an end portion on the base end side is connected to a terminal portion 13 (see FIG. 1) on the circuit board 1 side, and is inserted from the circuit board 1 side through the base 2 (for example, the first mounting portion 21 or the outer periphery mounting portion 23 of the base 2) in the thickness direction (direction along the axial direction L) to connect an end portion on the insertion side to a terminal portion 55 of the solar panel 5 (a substantially circular solar panel 51). Two terminal portions 13 and two terminal portions 55 are provided, and the solar panel 51 is connected to the circuit board 1 at two points. This electrically connects the solar panel 5 (a roughly circular solar panel 51) to the circuit board 1 via the contact member 15, and the electromotive force generated in the solar panel 5 is supplied to the circuit board 1 and the secondary battery 12 provided on the circuit board 1, providing a power source for each part of the watch 100.

[0032] By using a coil spring as the contact member 15, the occurrence of poor contact can be suppressed even if the length of the contact member 15 varies slightly due to tolerances or the like. On the other hand, the contact member 15, which is a coil spring, functions as a pressing member that exerts a restoring force on the insertion side end upward from the circuit board 1. In other words, the contact member 15 has a pressing force that presses up the solar panel 5. For this reason, in this embodiment, the peripheral frame 6 is arranged at a position facing the insertion side end of the contact member 15 to prevent the solar panel 5 from being pushed upward by the contact member 15.

[0033] The peripheral frame 6 presses down at least a part of the solar panel 5 from above against the pressing force from below by the contact members 15 acting as pressing members, thereby preventing the solar panel 5 from floating up or rattling. In other words, when at least a part of the approximately circular solar panel 51 is placed on the outer peripheral mounting portion 23, the outer peripheral frame 6 presses down at least a part of the approximately circular solar panel 51 from above, preventing the solar panel 5 (approximately circular solar panel 51) from floating up.

[0034] FIG. 11 is an oblique view of the outer peripheral frame viewed from the back side facing the base, and FIG. 12 is an oblique view showing a substantially circular solar panel superimposed on the back side of the outer peripheral frame shown in FIG. As shown in FIG. 11 and other figures, the outer periphery frame 6 is formed in a substantially annular shape, and is disposed along at least a portion of the outer periphery side mounting portion 23 of the base 2. As shown in FIG. The outer periphery frame 6 has hook portions 65 at multiple points in the circumferential direction that are engaged with the outer periphery of the base 2. The hook portions 65 have, for example, spring properties, and have locking claws 651 that protrude toward the inner periphery. By hooking the locking claws 651 of the hook portions 65 onto the outer periphery of the base 2, the outer periphery frame 6 is engaged with the base 2 and is attached so as not to float up from the base 2.

[0035] It is preferable that the hook portion 65 is provided at least near the position where the contact member 15 is provided when the solar panel 5 (the substantially circular solar panel 51) is arranged. As described above, the contact member 15 is a pressing member such as a coil spring, and the solar panel 5 (the substantially circular solar panel 51) is pushed up from below at the portion where the contact member 15 is provided. For this reason, by providing the hook portion 65 in this vicinity, the outer peripheral frame 6 is firmly locked to the base 2, and it is possible to resist the pressing force from below when the solar panel 5 is pushed up. In the "second model" described later, the spacer 8 is disposed at a position substantially opposite the contact member 15. For this reason, the peripheral frame 6 is formed with a hole 63 for attaching the spacer 8. The hook portion 65 is preferably provided in the vicinity of this hole 63.

[0036] The outer peripheral frame 6 has a first lower surface 61 provided at the lower part on the outer peripheral side, and a second lower surface 62 provided on the inner peripheral side of the first lower surface 61 and above at least a portion of the first lower surface 61. A first lower surface 61 of the outer periphery frame 6 is in contact with the main surface 23a of the outer periphery side mounting portion 23 (see FIG. 3, for example). The outer peripheral frame 6 is configured to be able to mount a spacer 8, which will be described later. For example, the spacer 8 is made of a material such as metal or carbon tool steel, and the outer peripheral frame 6 is made of a synthetic resin (insulating material). For example, a hole 63 is provided in the second lower surface 62 of the outer peripheral frame 6 to engage at least a part of the spacer 8. The spacer 8 is disposed at a position substantially opposite at least the contact member 15, which is a pressing member. The spacer 8 may be disposed not only at a position substantially opposite the contact member 15, but also at a plurality of positions in the circumferential direction of the outer peripheral frame 6. In this case, it is preferable that the spacer 8 is disposed at a position substantially opposite the contact member 15, and at equal intervals in the circumferential direction as much as possible.

[0037] When the solar panel 5 (approximately circular solar panel 51) is arranged in the space above the date wheel 3 (first date wheel 31) as in the timepiece 100, at least a part of the outer periphery 513 of the solar panel 5 (approximately circular solar panel 51) is arranged to contact the second lower surface 62, as shown in Fig. 12. It is then possible to sandwich at least a part of the outer periphery 513 of the approximately circular solar panel 51 between the second lower surface 62 of the outer periphery frame 6 and the outer periphery side mounting portion 23.

[0038] FIG. 13 is a side cross-sectional view of the essential parts of the contact portion between the solar panel and the circuit board in a "first model" watch provided with a substantially circular solar panel. As shown in Figure 13, when an approximately circular solar panel is placed in the space above the date wheel 3 (first date wheel 31), the outer frame 6 is able to directly press the outer periphery 513 of the solar panel 5 (approximately circular solar panel 51) with the second lower surface 62. As a result, even if the solar panel 5 (approximately circular solar panel 51) is pushed up from below by the restoring force (pressing force) of the contact member 15, the solar panel 5 can be prevented from floating up and kept in an untilted state.

[0039] The dial 7 (first dial 71) is positioned on top of the upper side (front side) of the axial direction L after the date wheel 3 (first date wheel 31), date wheel holder 4, and solar panel 5 (approximately circular solar panel 51) are assembled to the base 2 (i.e., from above the state shown in Figure 10). The first dial 71 is made of a light-transmitting material that transmits sunlight, such as a transparent resin, etc. This allows the solar panel 5 (approximately circular solar panel 51) located below the first dial 71 to receive sunlight, ensuring a sufficient amount of light required for power generation.

[0040] An axle hole 711 is formed in the approximate center of the dial 7 (first dial 71) corresponding to the position where the shaft 25 passes through. The shaft 25 passes through the axle hole 711 from bottom to top in the axial direction L and is exposed above the dial 7 (first dial 71). Hands (not shown), such as an hour hand, minute hand, and second hand, are attached to the part of the shaft 25 exposed above the dial, and appropriately display the time, etc. Furthermore, the dial 7 (first dial 71) is formed with a date window 712 (see FIG. 1) at a position corresponding to the small window 512 in the solar panel 5 (substantially circular solar panel 51). From the date window 712, it is possible to see the character portion 312 (see FIG. 9) corresponding to the date display of the date wheel 3 (first date wheel 31) exposed through the small window 512.

[0041] Next, the "second model" watch 200 (the internal configuration (module) of watch 200) will be described with reference to Figs. 4 to 6. Note that the dial 7 is not shown in Fig. 6. Also, the same components and parts as those in the previously described "first model" are given the same reference numerals, and descriptions thereof will be omitted where appropriate.

[0042] As shown in FIG. 4, the "second model" watch 200 (internal configuration (module) of watch 200) includes, in order along the axial direction L from the back side (lower side) to the front side (upper side) of watch 200, a circuit board 1, a base 2, a solar panel 5 (a roughly annular solar panel 52), an outer peripheral frame 6, a dial 7, etc. In addition, in watch 200, the configurations of circuit board 1, base 2, and outer frame 6 are similar to those of the "first model" watch 100 (internal configuration (module) of watch 100) shown in Figures 1 to 3, etc., so their explanation is omitted.

[0043] On the top (front side) of the base 2, a date indicator 3 (second date indicator 32 in FIG. 4 etc.) and a date indicator holder 4 and the like are provided. As shown in FIG. 4 and other figures, the second date indicator 32 is formed in a substantially annular shape, similar to the first date indicator 31, and is disposed below the outer peripheral frame 6. The date wheel 3 (second date wheel 32) has an outer circumferential portion 321 which is the portion on the outer circumferential side, an inner circumferential portion 322 which is the portion on the inner circumferential side, and a letter portion 323 provided between the outer circumferential portion 321 and the inner circumferential portion 322. Furthermore, between the outer circumferential portion 321 and the inner circumferential portion 322, there is a through portion 324 which penetrates from the front to the back of the date wheel 3, leaving a minimum portion for connecting the letter portion 323 to the outer circumferential portion 321 or the inner circumferential portion 322.

[0044] At least a part of the inner circumferential portion 322 of the date indicator 3 (second date indicator 32) is disposed on the second mounting portion 22 (the protruding portion 221 of the second mounting portion 22 in the embodiment). Similar to the first date indicator 31, a tooth portion (gear portion) 35 that meshes with the gear 27 that constitutes the train wheel mechanism is formed along the circumferential direction on the inner peripheral side of the inner peripheral portion 322 (see FIG. 6). The material from which the date wheel 3 (second date wheel 32) is made is not particularly limited, but it is made of metal such as stainless steel (SUS), titanium, etc. Furthermore, the method for making the character portion 323, etc. is not particularly limited, and various methods such as laser processing, punching processing for punching a metal plate, casting, etc. can be used. As for the date dial holder 4, it is the same as that of the "first model" watch 100, so its explanation will be omitted.

[0045] In the "second model" watch 200, the solar panel 5 is a substantially annular solar panel 52 as shown in Fig. 4. The solar panel 5 (substantially annular solar panel 52) is placed on a first mounting portion 21 on the base 2. The first mounting portion 21 is provided corresponding to a position below the date indicator 3 (second date indicator 32). In this way, the approximately annular solar panel 52 is provided below the date wheel 3 (second date wheel 32), and as described above, the second date wheel 32 has a through-hole 324. Therefore, sunlight passes through the through-hole 324 and is irradiated onto the solar panel 5 (approximately annular solar panel 52), ensuring a sufficient amount of light necessary for power generation.

[0046] Furthermore, the first mounting portion 21 of the base 2 has its main surface 21a located at a height position lower than the date indicator 3 (second date indicator 32), allowing the placement of a substantially annular solar panel 52. The height dimension from the main surface 21a of the first mounting portion 21 on the base 2 to the underside of the date indicator 3 (second date indicator 32) is greater than the thickness dimension of the substantially annular solar panel 52. Therefore, even when the solar panel 5 (approximately annular solar panel 52) is placed on the first mounting portion 21, the approximately annular solar panel 52 does not interfere with the underside of the second date wheel 32, and rotation of the date wheel 3 (second date wheel 32) is not hindered.

[0047] An extension portion 522 extending outward is provided on an outer periphery of a solar panel 5 (a substantially annular solar panel 52) at an outer periphery of the solar panel 5 that does not contribute to power generation, and a terminal portion 55 is provided on a part of the back surface of the extension portion 522, similar to the substantially circular solar panel 51 in the "first model". A contact member 15 is connected from below to a position corresponding to the terminal portion 55. The contact member 15 functions as a pressing member that exerts a restoring force upward from the circuit board 1 side arranged under the base 2.

[0048] 5 and 6, when the solar panel 5 (approximately annular solar panel 52) is placed on the first mounting portion 21 (main surface 21a of the first mounting portion 21) of the base 2, which is the space below the date wheel 3 (second date wheel 32), there is a distance between the second lower surface 62 of the outer peripheral frame 6 and the upper surface of the solar panel 5 (approximately annular solar panel 52). For this reason, even if the solar panel 5 is pushed up by the contact member 15, the second lower surface 62 of the outer peripheral frame 6 cannot directly press down the outer peripheral portion 523 of the solar panel.

[0049] Therefore, when the solar panel 5 (a substantially annular solar panel 52) is placed on the first mounting portion 21 (the main surface 21a of the first mounting portion 21), the spacer 8 is attached to the hole 63 provided in the second lower surface 62 of the outer circumferential frame 6. FIG. 6 is a cross-sectional perspective view of the main parts of the timepiece showing the state in which a spacer is attached to the hole, and FIG. 14 is a cross-sectional side view of the main parts of the timepiece in the state shown in FIG.

[0050] As shown in Figs. 6 and 14, the spacer 8 is attached to a position substantially opposite the contact member 15, which is a pressing member, and the outer peripheral frame 6 indirectly presses at least a part (e.g., the extension part 522 and the outer peripheral part 521) of the solar panel 5 (substantially annular solar panel 52) from above via the spacer 8 with the spacer 8 attached to the second lower surface 62 of the outer peripheral frame 6. This makes it possible to press the solar panel 5 (substantially annular solar panel 52) against the pressing force from below by the contact member 15, which is a pressing member, and prevents the solar panel 5 (substantially annular solar panel 52) from floating up, and ensures connection with the terminal part 13 on the circuit board 1 side. In addition, it is also possible to avoid the solar panel 5 (substantially annular solar panel 52) arranged below the date wheel 3 (second date wheel 32) coming into contact with the lower surface of the date wheel 3 (second date wheel 32) and hindering the rotation of the date wheel 3.

[0051] The dial 7 (second dial 72) is positioned on the upper side (front side) of the axial direction L, overlying the date wheel 3 (second date wheel 32), date wheel holder 4, and solar panel 5 (approximately annular solar panel 52) which are assembled to the base 2. The dial 7 (second dial 72) is made of, for example, a metal material such as titanium or stainless steel (SUS), or various resins, etc. The second dial 72 is an opaque, non-transparent member that does not transmit light.

[0052] As shown in FIG. 4, the dial 7 (second dial 72) is a substantially disk-shaped member having a main body 722 with an axis hole 721 formed in the approximate center for inserting the pointer shaft 25, and an outer periphery 724 with a plurality of openings 723 formed on the outer periphery of the main body 722 and arranged in the circumferential direction. At least the portion of the second dial 72 that corresponds to the date wheel 3 (second date wheel 32) is the outer periphery 722, and exposes the letter portion 323 of the date wheel 3 (second date wheel 32) so that it can be seen through the opening 723. The second dial 72 also transmits sunlight through the opening 723 to the solar panel 5 (substantially annular solar panel 52) that is arranged below the date wheel 3 (second date wheel 32). At least the outer periphery 722 of the second dial 72 may be made of a light-transmitting material that transmits sunlight, such as a transparent resin. In this case, the opening 723 does not need to be provided in the outer periphery 722.

[0053] [Effect] Next, the operation of this embodiment will be described. In this embodiment, a base 2 is placed on a circuit board 1, an inner circumference 313, 322 of a date wheel 3 (first date wheel 31 or second date wheel 32) is placed on a protruding portion 221 of a second mounting portion 22 of the base 2, and a date wheel holder 4 is placed inside the date wheel 3 (first date wheel 31 or second date wheel 32).

[0054] When the timepiece is a "first model" timepiece 100, a substantially circular solar panel 51 is placed in the space above the date indicator 3 (first date indicator 31). That is, at least a part of the outer periphery 513 of the substantially circular solar panel 51 is placed on the main surface 23a of the outer periphery mounting portion 23 of the base 2, and the outer periphery frame 6 and dial 7 (first dial 71) are placed thereon.

[0055] At least a portion of the first lower surface 61 of the outer peripheral frame 6 contacts the main surface 23a of the outer peripheral side mounting portion 23, and at least a portion of the second lower surface 62 of the outer peripheral frame 6 contacts at least a portion of the upper surface of the outer peripheral portion 513 of the approximately circular solar panel 51. As a result, at least a portion of the outer periphery 513 of the approximately circular solar panel 51 is sandwiched between the main surface 23a of the outer periphery side mounting portion 23 of the base 2 and the second under surface 62 of the outer periphery frame 6, and is directly pressed by the second under surface 62 of the outer periphery frame 6 so that the approximately circular solar panel 51 does not float up even when pressed from below by the contact member 15.

[0056] Furthermore, if the timepiece is a "second model" timepiece 200, the substantially annular solar panel 52 is placed on the main surface 21a of the first mounting portion 21 of the base 2, which is the space below the date indicator 3 (second date indicator 32). In this case, the date indicator 3 (second date indicator 32), the outer peripheral frame 6, and the dial 7 (second dial 72) are arranged above the substantially annular solar panel 52. At this time, spacers 8 are attached to holes 63 formed in the second lower surface of the outer periphery frame 6, and in this state, the outer periphery frame 6 is attached to the base 2. In this case as well, at least a part of the first lower surface 61 of the outer periphery frame 6 contacts the main surface 23a of the outer periphery mounting portion 23. Furthermore, the spacers 8 provided on the second lower surface 62 of the outer periphery frame 6 contact at least a part of the outer periphery 523 of the approximately annular solar panel 52, pressing the approximately annular solar panel 52 against the main surface 21a of the first mounting portion 21 of the base 2. As a result, the approximately annular solar panel 52 is indirectly held down by the outer frame 6 via the spacer 8 provided on its second lower surface 62 so that it does not float up even when pressed from below by the contact member 15.

[0057] Conventional electronic watches generally use roughly circular solar panels that have a large light-receiving area and are relatively inexpensive, but there are also models that use roughly annular solar panels, which are relatively expensive but have a high power generation efficiency relative to the light-receiving area. Conventionally, a base and outer frame were compatible with one type of solar panel arrangement and shape, and if a different arrangement or shape of solar panel was desired, a new base and outer frame had to be designed and manufactured. In particular, devices such as watches must be made small and thin in order to be worn on the user's wrist, and there was also the problem that large parts such as solar panels and sun indicators had limited freedom in terms of arrangement.

[0058] For example, when an electronic watch is equipped with a roughly circular date wheel and a roughly circular solar panel, it is common to place the roughly circular solar panel on top of the roughly circular date wheel; conversely, if an roughly circular solar panel is placed below the roughly circular date wheel, not only will the date wheel block light to the solar panel, reducing power generation efficiency, but the roughly circular solar panel, which has a relatively large area (volume), will be positioned further inside the device, which may reduce the freedom of placement of other components. Furthermore, when an approximately annular date wheel and an approximately annular solar panel are mounted on an electronic timepiece, the approximately annular solar panel may be positioned either above or below the approximately annular date wheel, but if the approximately annular solar panel is positioned on top of the approximately annular date wheel, a boundary will be created between the approximately annular solar panel and its inner area, making it easy for the user to recognize that the approximately annular solar panel is positioned, which may lead to a deterioration in design. Therefore, for reasons such as improving design by deliberately showing the approximately annular date wheel and making the boundary between the approximately annular solar panel and its inner area less noticeable on the date wheel, it is preferable to position the approximately annular solar panel below the approximately annular date wheel.

[0059] As described above, in the past, it was necessary to design and manufacture a new base and outer frame according to the shape of the solar panel due to the demands for compactness and thinness, as well as the positional relationship with relatively large parts such as the sun wheel.

[0060] For example, FIG. 15 is a side cross-sectional view of a main part showing an example of a conventional timepiece (timepiece module). 15, there is no space below the date indicator 30 in which the solar panel 50 can be placed. In this case, the base 20 and outer peripheral frame 60 are compatible only with the watch 500 (the module of the watch 500) in which the solar panel 50 is placed in the space above the date indicator 30 (the "first model" in this embodiment), and cannot be compatible with the case in which the solar panel 50 is placed in the space below the date indicator 30 (the "second model" in this embodiment).

[0061] 15, the solar panel 50 is disposed over almost the entire area below the dial 70. For this reason, a light-transmitting type must be used as the dial 70. Furthermore, because the solar panel 50 is disposed above the date indicator 30, it is difficult to construct a configuration in which the date indicator 30 is visible as part of the exterior design, and other design and engineering constraints arise. In this regard, by adopting the configuration of this embodiment, at least the base 2 and the outer peripheral frame 6 can be standardized, while the solar panel 5 (either an approximately circular solar panel 51 or an approximately annular solar panel 52) can be selectively placed either above or below the date wheel 3 (the first date wheel 31 or the second date wheel 32) depending on the design, etc.

[0062] [effect] As described above, according to this embodiment, the timepiece 100, 200, which is an electronic device, has a first mounting portion 21 having a substantially annular main surface 21a, a second mounting portion 22 which is disposed inside the first mounting portion 21 and has a main surface 22a and a protruding portion 221 protruding upward, and an outer periphery mounting portion 23 which is a third mounting portion disposed around the first mounting portion 21, with the height of the main surface 22a and the protruding portion 221 of the second mounting portion 22 being lower than the main surface 23a of the outer periphery mounting portion 23 which is the third mounting portion and higher than the main surface 21a of the first mounting portion 21, and a substantially annular date wheel 3 which has a thickness dimension smaller than the difference between the height of the protruding portion 221 of the second mounting portion 22 and the height of the main surface 23a of the outer periphery mounting portion 23 which is the third mounting portion, and at least a portion of its inner periphery is disposed on the second mounting portion 22. This allows space to be secured above and below the date wheel 3 (first date wheel 31 or second date wheel 32) in which a solar panel 5 (a roughly circular solar panel 51 or a roughly annular solar panel 52) can be installed, and a common base 2 etc. can be used for watches of multiple designs that differ in the placement position and shape of the solar panel 5. This eliminates the need for the effort and cost of designing and manufacturing the base 2 etc. for each design, and makes it possible to easily realize clocks with various exterior designs etc. without being bound by design restrictions etc.

[0063] In this embodiment, the main surface 23a of the outer periphery side mounting portion 23, which is the third mounting portion, includes a substantially arcuate surface, and the outer periphery frame 6 is disposed along at least a portion of the outer periphery side mounting portion 23. The outer peripheral frame 6 has a first lower surface 61 provided at the lower part of the outer peripheral side and in contact with the main surface 23a of the outer peripheral side mounting portion 23, which is the third mounting portion, and a second lower surface 62 provided on the inner peripheral side of the first lower surface 61 and above at least a portion of the first lower surface 61. Between the outer peripheral side mounting portion 23, which is the third mounting portion, and the second lower surface 62 of the outer peripheral frame 6, the solar panel 5 (a substantially circular solar panel 51) is arranged. Therefore, when a substantially circular solar panel 51 is provided on the base 2, it can be held in a predetermined position.

[0064] Further, the peripheral frame 6 of this embodiment has a hook portion 65 that is provided so as to extend downward and is engaged with the peripheral portion of the base 2 . By hooking the hook portion 65 (the locking claws 651 of the hook portion 65) onto the outer periphery of the base 2, the outer periphery frame 6 is locked to the base 2 and attached so as not to float up from the base 2, thereby preventing a component (for example, a substantially circular solar panel 51) arranged between the base 2 and the outer periphery frame 6 from floating up.

[0065] In addition, the outer peripheral frame 6 is engaged with the base 2, and is configured so that at least the second lower surface 62 can directly or indirectly hold down the outer periphery of the solar panel 5 (the approximately circular solar panel 51 or the approximately annular solar panel 52). The solar panel 5 needs to be connected to the circuit board 1 by the contact members 15, which are often pressing members such as coil springs. In this regard, even when the contact members 15 are pressing members, the solar panel 5 can be pressed directly or indirectly by the outer peripheral frame 6, so that even if the solar panel is pressed upward, it is possible to prevent the solar panel from tilting or interfering with members arranged above the solar panel 5 (for example, the second date wheel 32).

[0066] Furthermore, when the approximately circular solar panel 51 is arranged in the space above the date wheel 3 (first date wheel 31), it is configured so that at least a portion of the outer periphery 513 of the approximately circular solar panel 51 can be sandwiched between the second lower surface 62 of the outer periphery frame 6 and the main surface 23a of the outer periphery side mounting portion 23 of the base 2. Therefore, even if the substantially circular solar panel 51 is pressed from below by the contact members 15 or the like, the substantially circular solar panel 51 as a member can be stably held against the pressing force.

[0067] In this embodiment, the upper surface of the protruding portion 221 of the second mounting portion 22 includes an approximately arc-shaped surface, and on the inside of the protruding portion 221, there is provided a date indicator holder 4 having a roof portion 41 that extends above at least a portion of the inner circumferential side of the date indicator 3. As a result, at least the inner peripheral side of the date wheel 3 is pressed down, preventing the date wheel 3 from floating up.

[0068] The first mounting portion 21 on the base 2 is provided at a position below the date indicator 3 (second date indicator 32), and a substantially annular solar panel 52 can be placed on the first mounting portion 21. As a result, space is secured under the date wheel 3 (second date wheel 32) to place the solar panel 5, and the solar panel 5 (approximately circular solar panel 51 or approximately annular solar panel 52) can be provided either above or below the date wheel 3 (first date wheel 31 or second date wheel 32) without changing the shape or configuration of the base 2, etc.

[0069] Furthermore, the height dimension from the main surface 21a of the first mounting portion 21 in the base 2 to the underside of the date dial 3 (second date dial 32) is greater than the thickness dimension of the solar panel 52 which is substantially annular. Therefore, when the solar panel 5 is arranged under the date indicator 3 (second date indicator 32), it is possible to prevent the solar panel 5 from coming into contact with the date indicator 3 (second date indicator 32) and impeding its rotation.

[0070] [Variations] Although the embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to such an embodiment, and various modifications are possible without departing from the gist of the present invention.

[0071] For example, in the embodiment, when the solar panel 5 is provided under the date wheel 3 (second date wheel 32), the date wheel 3 (second date wheel 32) is provided with a through hole 323 to allow sunlight to pass through. However, if, for example, the entire date wheel 3 is formed from a light-transmitting material, a date wheel 3 without a through hole 323 may be placed on top of the solar panel 5 (approximately annular solar panel 52).

[0072] Furthermore, the shape of the outer peripheral frame 6 is not limited to the shape (approximately annular) shown in the embodiment. The peripheral frame 6 only needs to be disposed at a position facing at least the contact members 15 that function as pressing members, and may be an arc-shaped member that follows the outer periphery of the base 2. In this case, the arc-shaped peripheral frames are disposed at three or four locations, including the locations facing the contact members 15, as evenly spaced as possible. This allows the solar panel 5 to be stably pressed down without tilting.

[0073] In addition, in the embodiment, an example was given of the solar panel 5 arranged under the date indicator 3 (second date indicator 32) being approximately annular, but the shape of the solar panel 5 arranged under the date indicator 3 (second date indicator 32) is not limited to being approximately annular. For example, it may be C-shaped. Furthermore, by configuring the first mounting portion 21, which is the space for placing the solar panel 5 under the date wheel 3 (second date wheel 32), in an approximately ring-shaped manner, it is possible to accommodate cases where the solar panel 5 actually placed on the first mounting portion 21 is approximately ring-shaped or C-shaped, etc., without requiring design changes, which is preferable.

[0074] In addition, in the embodiment, a case has been illustrated in which a hole portion 63 is provided in the outer peripheral frame 6 and the spacer 8 is attached to the hole portion 63, but the portion where the spacer 8 is attached is not limited to the hole portion 63 and may be a recess that does not penetrate vertically.

[0075] In the present embodiment, the electronic device is exemplified as the timepieces 100 and 200, but the electronic device is not limited to a timepiece. The electronic device is not limited to one that displays time using hands, as long as it has a date dial 3 and has space above and below the date dial 3 for placing the solar panels 5. For example, the device may be a calendar device that does not display the time but displays the date, day of the week, etc. Furthermore, even if the electronic device is a clock, it is not limited to a clock that displays the time using hands as exemplified in the embodiment. For example, the time may be displayed using a digital display such as a liquid crystal display.

[0076] Although several embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents. [Explanation of symbols]

[0077] 1 Circuit Board 13 Terminal section 2 Base 21 First placement section 21a Main surface 22 Second placement section 22a Main surface 23 Outer circumference side placement section (third placement section) 23a Main surface 3 day car 31 The First Sun Wheel 32 The Second Sun Wheel 35 Teeth 4 Day Wheel Presser 5. Solar Panels 51 Nearly circular solar panel 52 Nearly annular solar panel 55 Terminal section 6 Periphery frame 61 1st bottom surface 62 2nd bottom surface 63 Hole 7 Dial 8 Spacer 100 Watches (electronic devices) 200 Watches (electronic devices)

Claims

1. a base including a first mounting portion having a substantially annular main surface, a second mounting portion disposed inside the first mounting portion and having a main surface and a protruding portion protruding upward, and a third mounting portion disposed around the first mounting portion, the main surface and the protruding portion of the second mounting portion being lower than the main surface of the third mounting portion and higher than the main surface of the first mounting portion; a substantially annular date wheel having a thickness dimension smaller than the difference between the height of the protruding portion of the second mounting portion and the height of the main surface of the third mounting portion, and at least a part of the inner periphery side of the date wheel being disposed on the second mounting portion; 1. An electronic device comprising:

2. a main surface of the third mounting portion includes a substantially arcuate surface, a peripheral frame disposed along at least a portion of the third mounting portion of the base; 2. The electronic device according to claim 1 .

3. The outer peripheral frame has a first lower surface provided at a lower portion on the outer peripheral side and in contact with a main surface of the third mounting portion, and a second lower surface provided on the inner peripheral side of the first lower surface and above at least a portion of the first lower surface.

3. The electronic device according to claim 2.

4. a substantially circular solar panel disposed between the third mounting portion and the second lower surface; 4. The electronic device according to claim 3.

5. The outer periphery frame is engaged with the base and holds at least a portion of the outer periphery of the substantially circular solar panel by at least the second lower surface.

5. The electronic device according to claim 4.

6. The outer peripheral frame has a hook portion that is provided so as to extend downward and is engaged with the outer peripheral portion of the base.

6. The electronic device according to claim 5,

7. The first placement portion is provided below the date indicator, A substantially annular solar panel is disposed on the first mounting portion.

2. The electronic device according to claim 1 .

8. a height dimension from a main surface of the first mounting portion to an upper surface of the protruding portion is greater than a thickness dimension of the substantially annular solar panel; 8. The electronic device according to claim 7,

9. The upper surface of the protrusion includes a substantially arcuate surface, A date indicator holder having a roof portion extending above at least a part of the inner periphery of the date indicator is provided on the inside of the protruding portion.

2. The electronic device according to claim 1 .

10. a base including a first mounting portion having a substantially annular main surface, a second mounting portion disposed inside the first mounting portion and having a main surface and a protruding portion protruding upward, and a third mounting portion disposed around the first mounting portion, the main surface and the protruding portion of the second mounting portion being lower than the main surface of the third mounting portion and higher than the main surface of the first mounting portion; a substantially annular date wheel having a thickness dimension smaller than the difference between the height of the protruding portion of the second mounting portion and the height of the main surface of the third mounting portion, and at least a part of the inner periphery side of the date wheel being disposed on the second mounting portion; An electronic watch characterized by:

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