JP5899872B2 - Electronic clock with solar battery - Google Patents

Description

  The present invention relates to an electronic timepiece with a solar cell.

Conventionally, a watch including a solar cell is known (for example, see Patent Document 1).
In this timepiece, a hook portion formed on the periphery of a metal plate is engaged with a circuit support provided around the movement, and a solar cell is attached to the metal plate with a double-sided tape.

International Publication No. 00/03310

In the timepiece, the metal plate on which the hook portion is formed extends to the outside of the outer periphery of the solar cell, and the hook portion at the periphery of the metal plate protrudes from the outer periphery of the solar cell and is exposed.
For this reason, there is a problem that the hook portion is seen through from the dial side, and the appearance design is lowered. In addition, when a dial ring or other parting material is arranged on the dial to cover the hook, the dial part has a small parting diameter and the model variation of the watch cannot be expanded. There was a problem.
Furthermore, if the size of the solar cell is made smaller than that of the metal plate, the metal plate can be seen. Therefore, the size of the solar cell needs to be set to the same size as the metal plate. For this reason, when applying to various timepieces having different movement sizes, the size of the solar cell must also be set according to the movement size. For this reason, solar cells of various sizes have to be manufactured, and there is a problem that costs increase.

  An object of the present invention is to provide an electronic timepiece with a solar cell that can expand the model variation without the restriction of the parting diameter of the dial and can reduce the cost.

  An electronic timepiece with a solar cell according to the present invention includes a solar cell, a translucent dial arranged on the timepiece side of the solar cell, a solar cell holding member fixed to the back surface of the solar cell, and the solar cell. A ground plate disposed on the back surface of the holding member, and a hook portion is formed on one of the opposed surfaces of the solar cell holding member and the ground plate facing each other, and the guide is formed on the other side so that the hook portion can be disposed. In the state where the hole is formed and the hook portion is disposed in the guide hole, the solar cell holding member is rotated with respect to the ground plane, and the periphery of the guide hole is locked to the hook portion. A battery holding member is fixed to the main plate.

  In the electronic timepiece with solar cell of the present invention, the hook portion is provided on one of the opposed surfaces of the solar cell holding member fixed to the back surface of the solar cell and the ground plate, and the guide hole is provided on the other. Since the hook portion and the guide hole are formed on the opposing surface, the hook portion and the guide hole can be locked near the center of the solar cell, and there is no need to project the hook portion to the outer peripheral side of the solar cell. .

Further, since the solar cell can be fixed near the base plate, that is, the center of the movement, the size of the solar cell can be freely set within the size of the movement. For this reason, even when the size of the movement is different, the size of the solar cell can be set to the minimum size based on the required power generation amount. Therefore, it is not necessary to increase the size of the solar cell in accordance with the size of the movement, and the cost of the solar cell can be reduced.
Furthermore, the solar cell holding member and the ground plane are fixed by arranging the hook portion in the guide hole and rotating the solar cell holding member to lock the periphery of the guide hole to the hook portion. This eliminates the need for connecting parts such as screws. For this reason, compared with the case where the solar cell is fixed to the ground plane with screws, the number of parts can be reduced, the cost can be reduced, and there is no need to consider interference with the parts arranged on the back side of the ground plane. It is possible to easily design an electronic timepiece with a solar battery that has less load on the battery.

In the solar cell-equipped electronic timepiece of the invention, the solar cell holding member is preferably fixed to the back surface of the solar cell with an adhesive or an adhesive tape.
When the solar cell and the solar cell holding member are fixed using connecting parts such as screws, the connecting parts are exposed on the surface of the solar cell, and this connecting part can be seen from the dial side. End up.
On the other hand, if the solar cell and the solar cell holding member are fixed with an adhesive or an adhesive tape, since there are no parts exposed on the surface of the solar cell, it is possible to prevent the appearance of the timepiece from being deteriorated.

  In the electronic timepiece with a solar cell of the present invention, it is preferable that the solar cell holding member includes a positioning portion that engages with a positioning protrusion formed on the base plate and performs positioning in the rotation direction.

  Since the positioning protrusion formed on the ground plate and the positioning portion provided on the solar cell holding member are engaged, the solar cell holding member is in a direction opposite to the locking direction of the guide hole and the hook portion with respect to the ground plate. It can prevent that the said guide hole remove | deviates from a hook part by rotating. Further, the solar cell holding member does not protrude from the outer periphery of the solar cell, and does not appear through the dial. For this reason, it is not necessary to arrange a parting material for covering the solar cell holding member, and it is possible to eliminate the restriction on the parting diameter. Therefore, the degree of freedom of the size of the dial and the parting diameter is increased, and when configuring an electronic watch with solar cell as a wristwatch, model variations from big size watches with large parting diameter to women's watches with small parting diameter Can increase the degree of freedom.

  The solar cell-equipped electronic timepiece of the present invention includes a ring member provided along the outer periphery of the movement, and the solar cell holding member engages with a positioning protrusion formed on the ring member to position in the rotational direction. It is preferable to provide the positioning part to perform.

Here, as a ring member provided along the outer periphery of the movement, a dial receiving ring member that supports the dial can be exemplified.
In the present invention, a positioning protrusion is formed on the ring member, and a positioning portion that engages with the positioning protrusion is formed on the solar cell holding member. For this reason, it can prevent that a solar cell holding member rotates to the reverse direction to the latching direction of the said guide hole and a hook part with respect to a ground plane, and the said guide hole remove | deviates from a hook part.
Moreover, since the ring member is arrange | positioned at the outer periphery of a movement, ie, the outer peripheral side of a ground plane, the positioning part of a solar cell holding member can be arrange | positioned near the outer periphery of a solar cell. For this reason, the positioning part can be easily attached to and detached from the positioning protrusion by pinching the positioning part with tweezers from the outer peripheral side of the solar cell, and the working efficiency can be improved.

  In this case, the solar cell holding member includes a main body part in which the hook part or the guide hole is formed, and a plurality of arm parts radially extending from the main body part, and at least one or more of the arms. It is preferable that the positioning part is formed at the tip of the part.

In the solar cell holding member, when forming a positioning portion that engages with the positioning protrusion formed on the ring member, the solar cell holding member is constituted by a disk having substantially the same size as the solar cell, and the positioning is performed on the outer peripheral portion thereof. A part can also be formed.
On the other hand, if the solar cell holding member is composed of a main body portion and an arm portion as in the present invention, the solar cell holding member is reduced in weight compared to the case where the solar cell holding member is composed of a disc having the same diameter. it can. Furthermore, since the arm portion functions as a reinforcing material like an umbrella bone, a film solar using a film base material can be used as a solar cell.

  In the electronic timepiece with solar battery of the present invention, it is preferable that an annular calendar wheel is disposed on the surface of the main plate, and the solar cell holding member has a positioning function in the clock thickness direction of the calendar wheel.

Since the part for holding the solar cell and the part for positioning the calendar wheel in a cross-sectional manner, that is, in the clock thickness direction, are combined, the number of parts can be reduced and the assembling procedure can be reduced, thereby reducing the cost.
Moreover, the thickness dimension of the movement can be reduced as compared with the case where both the solar cell holding member and the calendar wheel positioning part are provided.

The disassembled perspective view of the electronic timepiece with a solar cell according to the first embodiment of the present invention. The longitudinal cross-sectional view which shows the principal part of the said electronic timepiece with a solar cell. The top view which shows the solar cell holding member of the said electronic timepiece with a solar cell. The figure explaining the attachment procedure to the movement of the said solar cell holding member. The figure explaining the attachment procedure to the movement of the said solar cell holding member. The figure explaining the attachment procedure to the movement of the said solar cell holding member. The top view which shows the principal part of the electronic timepiece with a solar cell which concerns on 2nd Embodiment of this invention. The longitudinal cross-sectional view which shows the principal part of the electronic timepiece with a solar cell which concerns on 2nd Embodiment.

A first embodiment of the present invention will be described with reference to the drawings.
[Schematic configuration of solar cell clock]
FIG. 1 is an exploded perspective view of a timepiece body 10 of an electronic timepiece 1 with a solar cell according to the first embodiment.
The electronic timepiece with solar cell 1 is schematically configured by a watch body 10 and an exterior case (not shown) that houses the watch body 10, and is a wristwatch type that a user wears on an arm.

[Configuration of the watch body]
As shown in FIG. 1, the timepiece main body 10 includes a movement 2, a dial receiving ring member 3, a solar cell 4, and a translucent dial 5 arranged on the front side of the solar cell 4. As shown in FIG. 2, the movement 2 employs a general configuration in which a ground plane 20, a circuit board, a stepping motor, a driving wheel train, and the like are incorporated, and thus the description is simplified. Moreover, since the exterior case also has a general configuration, description thereof is omitted.

[Configuration of the main plate]
On the upper surface of the main plate 20, a date wheel 21 which is a calendar wheel is arranged. Drive teeth 211 are formed on the inner peripheral surface of the date dial 21.
Guide plates 221, 222, and 223 that project the inner peripheral surface (drive teeth 211) of the date dial 21 protrude from the main plate 20. Further, on the inner peripheral side of the date dial 21 on the upper surface of the main plate 20, the date indicator 21 is rotated by one pitch by the date indicator driving wheel 23 that rotates in mesh with the driving teeth 211 of the date indicator 21 or the date indicator driving wheel 23. In this case, a date jumper 24 is provided for regulating the position after the rotation.

Further, three hook portions 25, 26 and 27 for fixing the solar cell 4 are formed on the inner peripheral side of the date dial 21 on the upper surface of the main plate 20.
As shown in FIG. 2, the hook portion 25 is provided adjacent to the guide portion 221, and includes an upright portion 251 that is erected from the main plate 20 and an extension portion 252 that is extended laterally from the upright portion 251. Prepare. Therefore, a recess for locking the solar cell 4 is formed between the upper surface of the ground plane 20 and the extension 252. Similar to the hook portion 25, the other hook portions 26 and 27 are also provided with an upright portion and an extension portion.
In addition, positioning protrusions 28 are provided on the guide portions 222 and 223, respectively.

[Configuration of dial plate ring member]
The dial receiving ring member 3 is formed in an annular shape from a non-translucent material (for example, synthetic resin) and is colored in the same color as the solar cell 4 described later. As shown in FIGS. 1 and 2, it is formed on the surface side of the dial receiving ring member 3 along the inner peripheral surface of the dial receiving ring member 3, and from the upper surface 30 of the dial receiving ring member 3. In addition, a solar cell support surface 31 formed one step lower is formed.
Further, the dial receiving ring member 3 has support hook portions (not shown) formed at two locations facing each other across the plane center. The support hook portion engages with the back side of the movement 2, and the dial receiving ring member 3 holds the movement 2.

On the upper surface 30 of the dial receiving ring member 3, as shown in FIG. 1, two first dial fixing portions 33 arranged opposite to each other across the center of the dial receiving ring member 3, and arranged opposite to each other The two second dial plate fixing portions 34 are provided.
The first dial plate fixing portion 33 is configured by a substantially prismatic engagement protrusion formed to protrude from the upper surface 30 to the dial plate 5 side.
The second dial plate fixing portion 34 is constituted by a cylindrical engagement protrusion formed to protrude from the upper surface 30 to the dial plate 5 side.

[Configuration of solar cell]
As shown in FIG. 1, the solar cell 4 includes a substrate 41 having a substantially circular shape in plan view, and a light receiving portion 42 of the solar cell formed on the surface side of the substrate 41.
The base material 41 is made of an insulating material such as a synthetic resin film. The light receiving unit 42 is configured by laminating a metal electrode layer, a semiconductor layer, an insulating layer, a wiring electrode layer, a translucent sealing resin layer, and the like on the surface of the substrate 41. The light receiving unit 42 is divided into three regions. That is, three fan-shaped light receiving portions 42 are formed on the surface of the solar cell 4. In this embodiment, the power generation voltage is improved by connecting the outputs of the three light receiving units 42 in series.

  The solar cell 4 generates electric power when sunlight that has passed through the dial 5 hits the light receiving unit 42, and the electric power generated by the light receiving unit 42 is transferred to the movement 2 via a conductive member (not shown) made of a coil spring or the like. The provided secondary battery 29 is charged, and a circuit board or the like is driven by the output of the secondary battery 29.

[Configuration of solar cell holding member]
A solar cell holding member 45 is fixed to the back surface of the solar cell 4. The solar cell holding member 45 is made of a stainless steel plate and has a substantially disc shape. And the solar cell holding member 45 is affixed on the base material 41 of the solar cell 4 with an adhesive or an adhesive tape.
The solar cell holding member 45 is formed in a size smaller than that of the solar cell 4 and is entirely covered with the base material 41 of the solar cell 4. For this reason, the solar cell holding member 45 is not exposed from the solar cell 4 and is not visually recognized from the dial 5 side.

  Further, when the solar cell holding member 45 is attached to the main plate 20, the solar cell holding member 45 is arranged above the drive teeth 211 of the date dial 21 (on the dial plate 5 side) so that the date dial 21 does not move to the dial plate 5 side. It also has a positioning function. That is, the solar cell holding member 45 functions in the same manner as a date dial holder that positions the date indicator 21 in the cross-sectional direction (clock thickness direction).

As shown in FIG. 3, the solar cell holding member 45 includes three guide holes 46, 47, 48 corresponding to the hook portions 25, 26, 27. The guide hole 48 has a groove shape communicating with the outer periphery of the solar cell holding member 45.
As shown in FIG. 4, these guide holes 46, 47, 48 are formed so that the hook portions 25, 26, 27 can be arranged in the holes. That is, the formation positions and sizes of the guide holes 46, 47, 48 are set according to the hook portions 25, 26, 27.

  In addition, as shown in FIG. 2, the outer peripheral portion 453 that is continuous via the bent portion 452 with respect to the central portion 451 of the solar cell holding member 45 has a high height because the bent portion 452 is bent. The position (position in the timepiece thickness direction) is closer to the dial 5 side than the center part 451. The outer peripheral portion 453 is disposed above the drive teeth 211 of the date dial 21 and positions the date dial 21.

  Locking portions 461, 471, and 481 that are locked to the hook portions 25, 26, and 27 are formed in the central portion 451 that faces the guide holes 46, 47, and 48. These locking portions 461, 471, 481 are formed one step lower than the center portion 451 on the movement 2 side.

Positioning portions 472 and 482 extending from the outer peripheral portion 453 are formed in the guide holes 47 and 48. The positioning portions 472 and 482 are formed with holes 473 and 483 that engage with the positioning protrusions 28.
The solar cell holding member 45 is bonded to the base material 41 of the solar cell 4 at the outer peripheral portion 453.

[Configuration of dial plate]
As shown in FIGS. 1 and 2, the dial plate 5 is formed of a translucent material so as to cover the entire light receiving portion 42 of the solar cell 4. In addition, the dial 5 should just be a magnitude | size which covers at least the whole light-receiving part 42, and may be formed larger than the said dial receiving ring member 3. FIG.
The dial plate 5 includes four extending portions 51 that extend in the radial direction from the outer peripheral edge, and two first engaging portions 52 that are formed by notching each extending portion 51 in a U shape in plan view. And two second engaging portions 53 that are cut out in a semicircular shape in plan view.
The dial plate 5 is supported by the dial plate receiving ring member 3 by placing at least the extending portion 51 on the upper surface 30 of the dial plate receiving ring member 3.
The first engagement portion 52 is fitted to the first dial plate fixing portion 33, and the second engagement portion 53 is fitted to the second dial plate fixing portion 34. As a result, the dial 5 is positioned and fixed in the circumferential direction with respect to the dial receiving ring member 3.

[Assembly of the watch body]
Next, an assembling method of the timepiece main body 10 will be described with reference to FIGS.
First, the movement 2 is held by the dial receiving ring member 3. At this time, the dial receiving ring member 3 is fitted from above the movement 2, and the support hook portion of the dial receiving ring member 3 is supported by being hooked on the bottom surface of the movement 2. Further, an unillustrated middle frame is attached to the movement 2 according to the size of the watch case.

Next, the solar cell 4 is attached to the movement 2 in the following procedure. First, as shown in FIG. 4, the two conductive springs 7 that conduct the solar cell 4 to the secondary battery 29 are arranged in the holes of the ground plane 20, and then the solar cell holding member 45 bonded to the back surface of the solar cell 4. The hook portions 25, 26, 27 are disposed in the guide holes 46, 47, 48.
Next, the solar cell holding member 45 is rotated clockwise together with the solar cell 4 with respect to the movement 2, and as shown in FIG. 5, the locking portions 461, 471, 481 are connected to the hook portions 25, 26, 27. To lock. Thereby, the solar cell 4 and the solar cell holding member 45 are attached to the ground plane 20, and are positioned in the timepiece thickness direction.
Further, the holes 473 and 483 of the positioning portions 472 and 482 of the solar cell holding member 45 are engaged with the positioning projections 28 to position the solar cell holding member 45 in the rotation direction.
At this time, the conduction spring 7 is in contact with the electrode formed on the back surface of the solar cell 4 and is electrically connected to the solar cell 4.

Through the above procedure, the solar cell 4 and the solar cell holding member 45 are fixed to the movement 2 as shown in FIG.
As described above, the solar cell 4 and the solar cell holding member 45 are positioned with respect to the circumferential direction of the dial receiving ring member 3 by the holes 473 and 483 of the positioning portions 472 and 482 engaging with the positioning protrusions 28. .

Next, the dial 5 is held by the dial receiving ring member 3 from the surface side of the solar cell 4. That is, the first engagement portion 52 is fitted to the first dial plate fixing portion 33 of the dial plate receiving ring member 3, and the second engagement portion 53 is fitted to the second dial plate fixing portion 34. Accordingly, the dial plate 5 is placed on the upper surface 30 of the dial plate ring member 3 and positioned in the thickness direction. Furthermore, the dial plate 5 is positioned with respect to the circumferential direction of the dial plate receiving ring member 3 by engaging the engaging portions 52 and 53 with the dial plate fixing portions 33 and 34.
As described above, the watch body 10 is assembled.

The electronic timepiece with solar cell 1 according to the above-described embodiment has the following effects.
(1) Guide holes 46 having hook portions 25, 26, 27 formed on the upper surface of the base plate 20 of the movement 2 and having locking portions 461, 471, 481 in the solar cell holding member 45 bonded to the back surface of the solar cell 4. , 47, 48 are formed, and the hook portions 25, 26, 27 are engaged with the engaging portions 461, 471, 481, and the solar cell 4 is attached to the movement 2.
For this reason, since it is not necessary to provide a hook part on the outer periphery of the solar cell holding member 45 as in the prior art, the hook part does not protrude from the outer periphery of the solar cell 4 and does not show through the dial 5. . Therefore, it is not necessary to arrange a parting material for covering the solar cell holding member 45, and the restriction on the parting diameter can be eliminated. Accordingly, the degree of freedom of the size of the dial plate 5 and the parting diameter increases, and when the electronic timepiece with solar cell 1 is configured as a wristwatch, from a big size wristwatch having a large parting diameter to a wristwatch for women having a small parting diameter, The degree of freedom of model variation can be increased.

(2) Since the solar cell 4 can be fixed near the main plate 20, that is, near the center of the movement 2, the size of the solar cell 4 can be freely set within the size of the movement 2. For this reason, even when the size of the movement 2 is different, the size of the solar cell 4 can be set to the minimum size based on the required power generation amount. Therefore, it is not necessary to increase the size of the solar cell 4 in accordance with the size of the movement 2, and the cost of the solar cell 4 can be reduced.
Further, the solar cell holding member 45 and the base plate 20 are fixed by arranging the hook portions 25, 26, 27 in the guide holes 46, 47, 48, rotating the solar cell holding member 45, and hook portions 25, 26, 27. Since the locking portions 461, 471, 481 on the periphery of the guide holes 46, 47, 48 are locked to the guide holes 46, 47, 48, there is no need to separately fix them with connecting parts such as screws. For this reason, compared with the case where the solar cell 4 is fixed to the ground plane 20 with screws, the number of components can be reduced, the cost can be reduced, and there is no need to consider interference with the components arranged on the back side of the ground plane 20. The electronic timepiece 1 with solar battery can be easily designed.

(3) Since the solar cell 4 and the dial plate 5 can be stacked and arranged without a gap, for example, as compared with a case where a solar cell presser is provided and fixed between the solar cell 4 and the dial plate 5. Thus, the electronic timepiece with solar cell 1 can be thinned, and the depth of the date wheel 21 can be reduced.

(4) Since the solar cell 4 and the solar cell holding member 45 are fixed using an adhesive or a pressure-sensitive adhesive tape, the connecting component is the solar cell 4 compared to the case where the connecting component such as a screw is used for fixing. It is possible to prevent the appearance of the electronic timepiece with solar cell 1 from being deteriorated without being exposed to the surface.

(5) Since the solar cell holding member 45 also serves as a part for positioning the date dial 21 in a cross-sectional direction, that is, in the clock thickness direction, the number of parts can be reduced and the number of assembling procedures can be reduced, thereby reducing the cost. it can. Further, the thickness dimension of the movement 2 can be reduced as compared with the case where both the solar cell holding member 45 and the parts for positioning the date dial 21 are provided.

(6) Since the solar cell holding member 45 bonded to the back surface of the solar cell 4 can be made of a metal such as stainless steel, not only the function of attaching the solar cell 4 to the ground plane 20 but also the strength of the solar cell 4 itself is increased. Also works. Therefore, a film made of a synthetic resin or the like can be used as the base material 41 of the solar cell 4, and the solar cell 4 can be reduced in thickness and cost.

(7) Since the color of the surface side of the dial plate receiving ring member 3 is the same color as the color of the solar cell 4, the color tone of the solar cell 4 and the dial plate ring member 3 can be adjusted. For this reason, it is possible to prevent the outer shape of the solar cell 4 from being seen through the dial plate 5 due to the difference in color tone with respect to the dial plate ring member 3, and to improve the appearance when the dial plate 5 of the watch is viewed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The solar cell-equipped electronic timepiece 1A according to the second embodiment includes a solar cell holding member 45A shown in FIG. The solar cell holding member 45 </ b> A includes a main body 450 and a plurality of arms 49 extending radially from the main body 450.

The main body 450 has the same configuration as that of the solar cell holding member 45 of the first embodiment.
That is, the main body 450 includes a central part 451, a bent part 452, and an outer peripheral part 453. The main body 450 is formed with guide holes 46, 47, 48 and locking portions 461, 471, 481.
Therefore, the locking portions 461, 471, and 481 of the guide holes 46, 47, and 48 are locked to the hook portions 25, 26, and 27 of the main plate 20 as in the first embodiment. Therefore, the solar cell holding member 45A is the same as the first embodiment in that the solar cell holding member 45A is attached to the main plate 20 using the hook portions 25, 26, 27 and the locking portions 461, 471, 481. On the other hand, the solar cell holding member 45A is positioned by engaging the dial receiving ring member 3 provided on the outer peripheral side of the base plate 20 instead of the base plate 20 in the rotation direction, in the first embodiment. Is different.

The arm portion 49 extends radially from the outer peripheral portion 453 of the main body portion 450. The tips of these arm portions 49 are extended to the outer peripheral position of the solar cell 4, specifically, to the outer peripheral edge of the base material 41. For this reason, in the solar cell 4 that is a film solar using the film base 41, the arm portion 49 functions as a reinforcing material like an umbrella bone.
In addition, positioning portions 491 that engage with positioning protrusions 35 formed on the dial receiving ring member 3 are formed on the two arm portions 49 that are arranged at opposite positions of the arm portions 49. That is, in the second embodiment, the positioning projection 35 is formed not on the base plate 20 but on the dial receiving ring member 3, and the positioning portion 491 of the arm portion 49 is engaged with the positioning projection 35, whereby the solar cell holding member 45 </ b> A. Positioning in the rotational direction is performed.

In the second embodiment as described above, the same effects as those of the first embodiment can be obtained.
Moreover, since the solar cell holding member 45 </ b> A includes the arm portion 49 extended to the outer periphery of the solar cell 4, the solar cell 4 can be reinforced by the arm portion 49.
Further, since the arm portion 49 extended to the outer periphery of the solar cell 4 is provided with a positioning portion 491 that engages with the positioning projection 35 formed on the dial receiving ring member 3, the positioning portion 491 is tweezers or the like. The solar cell holding member 45A can be easily attached and detached by pinching. For this reason, the work efficiency when attaching / detaching the solar cell 4 and the solar cell holding member 45 </ b> A to the main plate 20 or the dial receiving ring member 3 can also be improved.
Furthermore, in the solar cell holding member 45A, since only the minimum necessary arm portion 49 has to be disposed on the outer peripheral side of the main body portion 450, the solar cell holding member is made of a disc having a diameter between the tips of the arm portions 49. The solar cell holding member 45A can be reduced in weight compared to the case where it is formed.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, the annular dial receiving ring member 3 is used. However, a flat rectangular frame shaped dial receiving ring member may be used. If such a dial receiving ring member is used, a dial or a watch case can constitute a square model.

  In the above embodiment, the hook portions 25, 26, 27 are formed on the base plate 20 side, and the guide holes 46, 47, 48 are formed on the solar cell holding members 45, 45A side. A hole may be formed and a hook portion may be formed on the solar cell holding members 45 and 45A side.

  In the said embodiment, although the solar cell holding member 45, 45A was fixed to the back surface of the solar cell 4 with the adhesive agent or the adhesive tape, you may fix with another fixing method. For example, when the base material 41 of the solar cell 4 is a metal plate, the solar cell holding members 45 and 45A may be fixed by caulking or the like.

  In the above embodiment, the solar cell holding members 45, 45A also serve as the positioning member in the clock thickness direction of the date dial 21, but the positioning of the date dial 21 in the clock thickness direction is performed by other parts. May be.

In the said embodiment, although the color of the dial receiving ring member 3 was the same color as the color of the solar cell 4, these may be different colors. In particular, when the exposed surface of the dial receiving ring member 3 is covered with a parting material such as a dial ring, it is not necessary to match the color of the dial receiving ring member 3 with the solar cell 4.
In the above embodiment, a wristwatch type timepiece has been described as an example of the timepiece according to the present invention. However, the present invention is not limited to this, and other types of timepieces such as a wall clock may be used.

  In the second embodiment, the solar cell holding member 45A is configured to include the main body portion 450 and the plurality of arm portions 49 extending radially from the main body portion 450. And other structures provided with the structure which positions in the rotation direction with respect to the dial receiving ring member 3 may be used. For example, the solar cell holding member may be composed of a single circular plate or a spiral plate.

  DESCRIPTION OF SYMBOLS 1,1A ... Electronic timepiece with solar cell, 2 ... Movement, 3 ... Dial plate receiving ring member, 4 ... Solar cell, 5 ... Dial, 10 ... Clock body, 20 ... Base plate, 21 ... Date wheel (calendar wheel), 25, 26, 27 ... hook part, 28, 35 ... positioning protrusion, 41 ... base material, 42 ... light receiving part, 44 ... engagement groove, 45, 45A ... solar cell holding member, 46, 47, 48 ... guide hole, 49 ... arm part, 251 ... upright part, 252 ... extension part, 450 ... main body part, 451 ... central part, 452 ... bent part, 453 ... outer peripheral part, 461, 471, 481 ... locking part, 472, 482 491 ... positioning part.

Claims (6)

Solar cells,
A translucent dial disposed on the clock face side of the solar cell;
A solar cell holding member fixed to the back surface of the solar cell;
A ground plane disposed on the back surface of the solar cell holding member,
A hook portion is formed on one of the opposed surfaces of the solar cell holding member and the ground plate, and the other is a guide hole formed so that the hook portion can be disposed, and the hook portion located around the guide hole. A locking part that can be locked is formed,
The solar cell holding member is fixed to the base plate in a state where the hook portion is locked to the locking portion . The electronic timepiece with solar cell according to claim 1,
The solar cell holding member is fixed to the back surface of the solar cell with an adhesive or an adhesive tape. In the electronic timepiece with solar cell according to claim 1 or 2,
The solar cell holding member includes a positioning portion that engages with a positioning protrusion formed on the ground plate. In the electronic timepiece with solar cell according to claim 1 or 2,
A ring member provided along the outer periphery of the movement,
The solar cell holding member includes a positioning portion that engages with a positioning protrusion formed on the ring member. In the electronic timepiece with solar cell according to claim 4,
The solar cell holding member includes a main body part in which the hook part or a guide hole is formed, and a plurality of arm parts radially extending from the main body part,
The electronic timepiece with solar cell, wherein the positioning portion is formed at a tip of at least one of the arm portions. In the electronic timepiece with solar cell according to any one of claims 1 to 5,
An annular calendar wheel is arranged on the surface of the base plate,
The solar cell holding member is disposed above the teeth of the calendar wheel in the clock thickness direction of the calendar wheel, and the calendar wheel is moved in the clock thickness direction by the base plate and the solar cell holding member. An electronic timepiece with a solar cell, characterized by positioning.

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