JP2015090327A - Electronic watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic watch capable of corresponding to a circuit substrate with minimum change even in a case where a new function is added by arranging a solar cell, for example, on the outside of a bottom board.SOLUTION: In an electronic watch, a solar cell (circuit element) 11 is vertically arranged on the outside of a number plate 4 in an exterior case 2, and in a plane view from the plane side of a timepiece movement 9, from the contour of the timepiece movement 9 excluding a circuit substrate 10, a circuit substrate projection part 10a is provided in the circuit substrate 10 so as to projecting from the circuit substrate 10. The electronic watch has connection springs 12a, 12b electrically connecting between the solar cell 11 and connection terminal parts 29a, 29b provided on one surface of the circuit substrate projection part 10a.

Description

  The present invention relates to an electronic timepiece having a circuit board of a timepiece driving unit for driving a timepiece movement.

  Conventionally, a quartz watch having a watch movement that uses a primary battery such as a button battery and uses the power of the primary battery as a clock drive source is known. In recent years, the generated power obtained by a solar cell is used as a clock drive source. The number of electronic watches with solar cells is increasing.

  In an electronic timepiece with a solar cell that uses the generated power obtained from the solar cell as a clock driving source, for example, a structure in which the solar cell is arranged on the back side of a semi-transparent dial is known. In such an arrangement structure of solar cells, it is necessary to form the dial plate with a semi-transparent material, so that the design of the dial plate is restricted.

  Therefore, in order to eliminate such a design restriction of the dial, for example, Patent Document 1 discloses an electronic timepiece with a solar cell having a structure in which belt-shaped solar cells are arranged substantially vertically around the outer peripheral edge of the dial. Has been proposed.

  In the electronic watch with a solar cell of Patent Document 1, a connection spring is installed between a belt-like solar cell arranged vertically around the outer periphery of the dial plate and the circuit board, and the tip end side of the connection spring is arranged. It is pressed against the solar cell so that it can be elastically displaced. Thereby, the generated power obtained by the solar cell is stored in the secondary battery via the connection spring and the circuit board.

JP 2013-29469 A

  An electronic timepiece with a solar cell as in Patent Document 1 has an advantage that battery replacement is unnecessary. And if such an electronic watch with solar cells can be developed on a small scale by remodeling the watch movement with the existing primary battery and parts can be shared with the existing watch movement, the cost and development period will be reduced. There are significant benefits.

  However, if the circuit board for quartz watches is changed to the circuit board for electronic watches with solar cells, the parts placement of the watch movement will change drastically, making it difficult to make small-scale developments and share parts. There was a problem.

  Therefore, the present invention provides an electronic timepiece that can cope with a timepiece movement with a minimum change even when a solar cell or the like is arranged outside the timepiece movement to incorporate a new function. Objective.

  In order to achieve the above object, an electronic timepiece according to the present invention has a circuit board on which electronic components for electrically driving a timepiece movement are mounted, and the timepiece movement is provided on the back side of the dial in an outer case. In the electronic timepiece disposed between the timepiece movement and the case back, the circuit element is arranged outside the timepiece movement, and the timepiece movement excluding the circuit board in a plan view seen from the plane side of the timepiece movement. A circuit board protrusion is provided on the circuit board so that the circuit board protrudes from an outer shape, and the connection terminal provided on one surface of the circuit board protrusion is electrically connected to the circuit element. It has a connection member.

  According to the electronic timepiece of the invention, even when a circuit element (for example, a solar cell) is arranged outside the timepiece movement and a new function is incorporated, the timepiece in which the circuit board is excluded from the circuit board constituting the timepiece movement. By forming the circuit board protrusion corresponding to the circuit element so as to protrude from the outer shape of the movement, it is possible to easily cope with the minimum change.

The top view which shows the surface side (dial board side) of the electronic timepiece which concerns on embodiment of this invention. AA sectional view taken on the line AA of FIG. 1 is an exploded perspective view of an electronic timepiece according to an embodiment of the present invention. The perspective view which shows a solar cell. The figure which shows "6 o'clock" vicinity of the dial of the electronic timepiece which concerns on embodiment of this invention. (A) is a figure which shows the dial plate side of a timepiece movement, (b) is a side view of a timepiece movement, (c) is a figure which shows the back cover side of a timepiece movement. (A) is a figure which shows the dial side of a circuit board, (b) is a figure which shows the back cover side of a circuit board. (A)-(d) is a figure which shows the assembly | attachment procedure of a solar cell and a connection spring. The enlarged view which shows the vicinity of "6 o'clock" of the dial of the electronic timepiece concerning this embodiment. (A) is a figure which shows the assembly | attachment of the timepiece movement in an exterior case, (b) is sectional drawing which shows the connection terminal part vicinity of the solar cell electrically connected with the connection spring, and a circuit board protrusion part. (A)-(c) is a figure which shows the assembly | attachment procedure of a dial plate and a pointer | guide. The perspective view which shows the back surface of a dial. The perspective view which shows the 4 adhesion | attachment area | regions in an exterior case. The figure which shows the state which welded the windshield member to the internal peripheral surface of an exterior case. (A) is a figure which shows the state which press-fitted the solar cell contact member in the groove part formed in the inner peripheral surface of an exterior case, (b) shows the front-end | tip part of a solar cell against the side surface of a solar cell contact member. The figure which shows the state which contacted and made the solar cell contact | abutted along the inner peripheral surface of an exterior case, (c) is the state which has positioned the front-end | tip part of a solar cell so that it may protrude a little in a groove part FIG. (A) is a perspective view which shows the state which hold | maintained both front-end | tip parts of the solar cell with the solar cell contact member, (b) is a plane which shows the state which hold | maintained both front-end | tip parts of the solar cell with the solar cell contact member Figure. The figure which shows the state which provided the embossment in the lower surface of the facing ring. The figure which shows the turning ring formed separately from the windshield member. The figure which shows the state which provided the reflection layer with a high light reflectance in the outer peripheral part of a dial ring and a dial.

Hereinafter, the present invention will be described based on the illustrated embodiments.
FIG. 1 is a plan view showing a surface side (dial plate side) of an electronic timepiece according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. It is a disassembled perspective view of a timepiece. The electronic timepiece in this embodiment is an example of a wristwatch with a solar cell that uses the generated power obtained by a solar cell (solar cell) as a clock drive source and displays the time with hands (hour hand, minute hand, second hand). is there.

  In the present embodiment, the timepiece movement driven by the primary battery is modified to be driven by the secondary battery using a solar cell.

(Overall configuration of electronic watch)
As shown in FIGS. 1 to 3, the electronic timepiece (solar cell wristwatch) 1 according to the present embodiment has a disk-shaped dial 4 inside a windshield member 3 provided on the surface side of the exterior case 2. A pointer (hour hand 5, minute hand 6, second hand 7) is coaxially installed at the center of the dial 4. The exterior case 2 is integrally formed of a resin material, and the windshield member 3 is formed of a transparent resin material. A turning ring 8 (see FIG. 2) is integrally formed around the inner periphery in the vicinity of the outer peripheral edge of the windshield member 3.

  The exterior case 2 has a structure in which a back cover portion is also integrally formed, and a timepiece movement 9 is disposed between a recess 2 a (see FIG. 3) formed at the bottom of the exterior case 2 and the back surface of the dial 4. . In addition, the structure which made the exterior case 2 fit the back cover formed separately may be sufficient.

  On the inner peripheral surface of the outer case 2, a strip-shaped solar cell 11 is vertically arranged so as to be positioned around the outer periphery of the outer peripheral edge of the dial 4. The extraction electrodes 11d and 11e (see FIG. 4) of the solar cell 11 and the circuit board 10 are electrically connected by connection springs 12a and 12b made of a thin plate-like conductive member (detailed connection structure will be described later). ).

  Both end sides of the connection springs 12a, 12b are bent obliquely upward so as to obtain an elastic force.

  A crown 13 is arranged on the outer surface of the outer case 2 located at “3 o'clock” (right side in FIG. 1) of the dial 4, and the winding stem 14 connected to the crown 13 is It extends to the inside of the watch movement 9.

(Configuration of solar cell 11)
As shown in FIG. 4, the solar cell 11 is a strip-like flexible solar cell (solar cell) in which an amorphous silicon layer or the like is formed on a base substrate 11a made of PET film. Extraction electrodes 11d and 11e are provided on a power generation region 11b on one surface side that receives light and generates power, and a protruding portion 11c that protrudes downward from the center of the photovoltaic region 11b.

  As shown in FIG. 5, the belt-shaped solar cell 11 is vertically arranged so that the central protruding portion 11 c is held near “6 o'clock” of the dial 4 along the inner peripheral surface of the outer case 2. Has been placed. Both end sides of the solar cell 11 are located in the vicinity of “2 o'clock” of the dial plate 4 and in the vicinity of “10 o'clock” of the dial plate 4 around the “6 o'clock” neighborhood of the dial 4. In the solar cell 11 arranged vertically, the power generation region 11b faces the inside (the dial 4 side) so as to face the turn ring 8.

  Since the solar cell 11 has flexibility, when both sides are curved in an arc shape as shown in FIG. 5, an elastic force acts to return to the original linear state, and the inner periphery of the outer case 2 Held along the surface. In FIG. 5, the windshield member 3 is removed.

(Configuration of watch movement 9)
A timepiece movement 9 is shown in FIGS. 6A is a view showing the surface side (the dial 4 side) of the timepiece movement 9, FIG. 6B is a view showing the side thereof, and FIG. 6C is a view showing the timepiece movement 9. It is the figure which showed the back side (the dial 4 opposite side).

  The timepiece movement 9 includes a base coil 20, a pointer (hour hand 5, minute hand 6, second hand 7) through a plurality of train wheels 21, a drive motor 22 a of a drive motor (step motor) 22, and electric power generated by the solar cell 11. Mainly a secondary battery 23 for accumulating power, a crystal resonator 24 for oscillating a reference clock for timing, a train wheel receiver 25 for holding a plurality of wheel trains 21, a secondary battery presser member 26 for holding secondary batteries 23, etc. It is provided as a part. The drive motor 22 includes a stator, a rotor, and the like in addition to the drive coil 21a.

  Although omitted in FIGS. 6A to 6C, a crown 13 (see FIG. 3) is attached to the outer end of the winding stem 14 whose tip side is connected to the inside of the timepiece movement 9.

(Configuration of the circuit board 10)
As shown in FIGS. 7A and 7B, most of the circuit board 10 is disposed in the ground plane 20, but one side of the circuit board 10 (the right side of FIG. 7A, FIG. 7B). A side end portion (hereinafter referred to as “circuit board protruding portion”) 10 a protrudes from the side end surface of the main plate 20.

  7A is a plan view showing the circuit board 10 having a surface (hereinafter referred to as “front surface”) facing the back surface of the ground plane 20, and FIG. 7B is a side opposite to the back surface of the ground plane 20. FIG. 2 is a plan view showing a circuit board 10 on the surface (hereinafter referred to as “back surface”).

  A plurality of electronic components such as a control IC 27 for driving and controlling the timepiece movement 9 are mounted on a portion (a portion other than the circuit board protruding portion 10 a) located in the ground plane 20 of the circuit board 10. In FIG. 7, these mounting components (control IC 27, crystal resonator 24, etc.) are omitted from illustration.

  On the surface of the circuit board protruding portion 10a of the circuit board 10 (surface on the dial plate 4 side), two capacitors 28 for power supply and boosting obtained by the solar cell 11 are mounted. The capacitor 28 has an elongated outer diameter shape in a plan view of the circuit board 10, and in order to minimize the protrusion of the circuit board protrusion 10 a, the two capacitors 28 are arranged in the protrusion direction of the circuit board protrusion 10 a. On the other hand, the mounting pattern is formed so as to be mounted with an inclination of about 45 degrees. In addition, two connection terminal portions 29a, which are in contact with the substrate side end portions of the connection springs 12a, 12b (see FIG. 3 and the like) on the back surface (surface opposite to the dial plate 4) of the circuit board protruding portion 10a. 29b is provided.

  Note that the outer shape of the circuit board 10 in the movement for the primary battery before remodeling is an outer diameter shape excluding the circuit board protruding portion 10a, and is a size and an arrangement position within the ground plane 20 in a plan view. In this embodiment, the layout of the mounted parts before remodeling is used substantially as it is, and is shared with the solar, and added with the solarization, the capacitor 28 that cannot be placed in the original circuit board, and the two connection terminals 29a and 29b, It arrange | positions at the circuit board protrusion part 10a.

  If the length direction of the capacitor 28 is arranged parallel to the protruding direction of the circuit board protruding portion 10a, the length of the capacitor 28 becomes longer than the protruding width of the circuit board protruding portion 10a shown in FIG. It is necessary to lengthen the protruding width of the circuit board protruding portion 10a.

  Further, when the length direction of the capacitor 28 is arranged in a straight line in a direction perpendicular to the protruding direction of the circuit board protruding portion 10a, in addition to the protruding amount in the protruding direction required for the connection terminals 29a and 29b, the circuit board protruding The width of the portion 10a in the direction orthogonal to the protruding direction increases, and as a result, the area of the circuit board protruding portion 10a increases.

  Further, by mounting the capacitor 28 on the surface opposite to the connection terminals 29a and 29b and in a position overlapping with the two in plan view, the strength of the circuit board protruding portion 10a is increased, and the circuit board is formed by the connection terminals 29a and 29b. It can prevent that the protrusion part 10a is pressed and deform | transforms.

  Next, the procedure for assembling the main components (windshield member 3, watch movement 9, solar cell 11, connection springs 12a, 12b, etc.) of the electronic timepiece 1 into the exterior case 2 will be described with reference to FIGS. And explain briefly.

  As shown in FIGS. 8A and 8B, in the vicinity of the inner peripheral surface of the outer case 2, a plurality of convex portions 2b curved along the inner peripheral surface are integrally formed. The solar cell 11 is vertically arranged in the gap between the surface and the convex portion 2b. Under the present circumstances, the solar cell 11 is positioned by arrange | positioning the protrusion part 11c (refer FIG. 9) of the solar cell 11 in the inner peripheral surface side of the concave connection spring fixing | fixed part 2c formed in the bottom part in the exterior case 2. FIG. Held. The position of the connection spring fixing portion 2c where the protruding portion 11c of the solar cell 11 is held corresponds to the vicinity of “6 o'clock” of the dial 4. As shown in FIG. 9, extraction electrodes 11 d and 11 e provided on the projecting portion 11 c of the solar cell 11 are located on the inner peripheral surface of the outer case 2 in the vicinity of “6 o'clock” of the dial 4.

  Then, as shown in FIGS. 8C and 8D, the connection springs 12a and 12b are formed on the two protrusions 2d (see FIGS. 8A and 8B) provided on the connection spring fixing portion 2c. Through the holes 12c (see FIG. 3), and through the holes 30a (see FIG. 3) formed in the fixing plate 30 from above, the flat portions of the connection springs 12a and 12b are connected to the connection springs 12a and 12b via the fixing plate 30 by screws. It fixes to the fixing | fixed part 2c. As a result, the end portions of the connection springs 12a and 12b on the solar cell side are brought into contact with the extraction electrodes 11d and 11e of the solar cell 11 by applying an elastic force (see FIG. 10B).

  Then, as shown in FIG. 10A, the timepiece movement 9 is fitted and fixed to the concave portion 2 a at the bottom in the exterior case 2 from above, and then the crown 13 is attached to the tip of the winding stem 14. At this time, as shown in FIG. 10 (b), the board-side ends of the connection springs 12a and 12b apply elastic force to the connection terminal parts 29a and 29b formed on the circuit board protrusion 10a of the circuit board 10, respectively. Are touched. Thereby, the extraction electrodes 11d and 11e of the solar cell 11 and the connection terminal portions 29a and 29b of the circuit board protruding portion 10a are electrically connected via the connection springs 12a and 12b.

  Then, as shown in FIGS. 11A and 11B, the dial 4 is disposed in the outer case 2 so as to cover the timepiece movement 9. At this time, as shown in FIG. 12, the two positioning pins 31 formed on the back surface of the dial 4 are inserted into positioning holes (not shown) provided in the timepiece movement 9, The four attached circular double-sided adhesive tapes 32 are adhered to the four adhesive regions 2e in the exterior case 2 shown in FIG. Thereby, the dial 4 is positioned and fixed at a predetermined position around the base plate 20 in the exterior case 2. In this state, the dial 4 is temporarily fixed because it is still being assembled.

  The circuit board 10 is provided with an elastic force on the dial plate 4 side by the connection springs 12a and 12b. However, the circuit board 10 can be temporarily fixed by adhering the dial plate 4 to the exterior case 2 with a double-sided adhesive tape. The dial 4 fixed to the timepiece movement 9 can be prevented from floating.

  Then, as shown in FIG. 11 (c), the hands (hour hand 5, minute hand 6, second hand 7) are inserted into the pointer shaft 33 protruding from the central opening of the dial 4.

  And as shown in FIG. 14, the windshield member 3 is arrange | positioned in the exterior case 2 from the dial 4, and the outer periphery lower corner | angular part 3a circumference | surroundings of the windshield member 3 which consists of a transparent resin material make the exterior which consists of a resin material Ultrasonic welding is applied to the step on the inner peripheral surface of the case 2, and the surface on the dial 4 side in the outer case 2 is sealed with the windshield member 3. As a result, the electronic timepiece 1 in which main components (windshield member 3, timepiece movement 9, solar cell 11, connection springs 12a and 12b, etc.) as shown in FIGS. can get.

  In the electronic timepiece 1 described above, light such as sunlight is incident on the solar cell 11 (power generation region 11 b) disposed vertically through the windshield member 3 and the turn ring 8, whereby electric power is obtained in the power generation region 11 b. The electric power obtained in the solar cell 11 (power generation region 11b) is stored in the secondary battery 23 via the connection springs 12a and 12b, the connection terminal portions 29a and 29b, and the circuit portion of the circuit board 10 and the timepiece movement. 9 is supplied to a pointer driving motor.

  As shown in FIG. 14, the upper portion 8a of the dial ring 8 on the dial 4 side is formed in a curved surface having a predetermined radius of curvature. For this reason, a part of the light incident on the windshield member 3 is reflected to the solar cell 11 side by the curved upper portion 8a and is incident on the power generation region 11b, whereby the light receiving efficiency can be increased.

  Further, as described above, the lower surface of the turning ring 8 formed integrally with the windshield member 3 is in contact with the periphery of the outer peripheral edge portion of the dial plate 4 and presses the dial plate 4 from above. As a result, the circuit board protruding part 10a of the circuit board 10 is subjected to a force that lifts upward due to the elastic force of the connection springs 12a and 12b toward the board end side. By the pressing of 4, the floating of the circuit board protruding portion 10a can be reliably suppressed.

  Further, since the double-sided adhesive tape 32 itself fixing the dial 4 to the exterior case 2 has some elasticity (cushioning property), the thickness of the watch movement 9 and the height direction of the exterior case 2 are increased. Depending on the dimensions and dimensions of the windshield member 3 in the height direction, even if there is some error in the height position of the dial 4, this error can be absorbed and fixed with high accuracy. Although the double-sided adhesive tape 32 is used to fix the dial 4, other than the double-sided adhesive tape 32, an elastic adhesive such as a silicon adhesive may be used.

  Further, since the belt-like solar cells 11 are arranged vertically along the inner peripheral surface of the outer case 2, the solar cells 11 are not noticeable even when the dial plate 4 side is viewed from above the windshield member 3, When the windshield member 3 is viewed from obliquely above, the turn ring 8 is in front of the solar cell 11, so that the solar cell 11 is hardly noticeable.

  Further, the extraction electrodes 11d and 11e of the solar cell 11 are arranged in the vicinity of “6 o'clock” of the dial 4 (see FIGS. 5 and 9). This is because when the electronic timepiece 1 is worn on the arm and the dial 4 side is viewed from above the windshield member 3, the inner peripheral surface side of the outer case 2 located near “6 o'clock” of the dial 4 is The outer case 2 tends to be a blind spot. For this reason, as shown in FIG. 14, the solar cell side edge part of the connection springs 12a and 12b located in the clearance gap between the outer peripheral part of the dial plate 4 and the solar cell 11 can be made not conspicuous.

  By the way, in the electronic timepiece 1 described above, the timepiece movement 9 is substantially the same as that for a general-purpose quartz timepiece except for the circuit board protruding portion 10a. (Solar cell).

  That is, in order to make a solar cell (solar cell) from a general-purpose structure for a general quartz watch with minimal changes, in this embodiment, as described above, the circuit board 10 protrudes from the ground plane 20. In this way, the circuit board protruding portion 10a on which the two capacitors 28 and the like are mounted, the belt-like solar cell 11 arranged vertically along the inner peripheral surface of the outer case 2, and the connection formed on the circuit board protruding portion 10a Connection springs 12a and 12b that are electrically connected between the terminal portions 29a and 29b and the extraction electrodes 11d and 11e of the solar cell 11 are newly provided.

  In addition, the battery is changed from the primary battery to the secondary battery (the size of the primary battery and the secondary battery is substantially the same). Further, in order to minimize the protrusion of the circuit board protruding portion 10a, the mounted capacitor 28 is inclined by approximately 45 degrees.

  In this way, since the watch movement 9 requires minimal changes, it can be used for a general versatile quartz watch, and the conventional automatic movement assembly device can also be used with minimal improvement. can do. Therefore, it is possible to manufacture the electronic timepiece 1 with a solar cell described above at lower cost and with high productivity.

  By the way, when the solar cell 11 is vertically assembled along the inner peripheral surface of the outer case 2, the flexible belt-shaped solar cell 11 shown in FIG. It is held along a groove between the inner peripheral surface of the outer case 2 and the convex portion 2b (see FIGS. 8A and 8B). However, when the entire solar cell 11 is curved in an arc shape and disposed along the inner peripheral surface of the exterior case 2, the solar cell 11 is not fixed and the solar cell 11 is a free end. When the cell 11 is assembled, when the solar cell 11 is touched, the vicinity of the tip of the solar cell 11 is lifted away from the groove between the inner peripheral surface of the outer case 2 and the convex portion 2b, and the convex portion 2b. There are times when you ride on top.

  In this way, when the vicinity of the tip of the solar cell 11 rides on the convex portion 2b, the turn ring 8 formed integrally with the windshield member 3 when the windshield member 3 is assembled into the exterior case 2 in the subsequent process. There is a possibility that the lower surface of the solar cell 11 hits the tip side of the solar cell 11 and the solar cell 11 is deformed or damaged. Therefore, it is important to hold the entire solar cell 11 curved in an arc shape along the groove between the inner peripheral surface of the outer case 2 and the convex portion 2b.

  Therefore, as shown in FIGS. 15A and 15B, a solar cell abutting member 40 is provided for abutting on both end portions of the solar cell 11 (one end portion in the figure). The solar cell abutting member 40 is press-fitted from the inner front side and fixed to a concave groove 2g (see FIG. 15C) formed on the inner peripheral surface 2f of the outer case 2. As shown in FIG. 15C, the tip of the solar cell 11 is set so as to protrude slightly into the concave groove 2g when the solar cell contact member 40 is removed. That is, the solar cell abutting member 40 is disposed at a position where the tip of the solar cell 11 is in contact with the side surface of the solar cell abutting member 40 and is stretched. The solar cell 11 is arrange | positioned along the inner peripheral surface 2f swelled in circular arc shape of the exterior case 2, as shown in FIG.15 (b).

  15A, 15B, and 15C, convex portions 2b (see FIGS. 8A and 8B) that are provided close to each other along the inside of the inner peripheral surface 2f of the outer case 2. ) Is omitted.

  In the state of FIG. 15B, the tip of the solar cell 11 is in contact with the side surface of the solar cell contact member 40, and the tip of the solar cell 11 cannot protrude into the concave groove 2g. As a result, the solar cell 11 is subjected to a force that deforms in an arc shape along the inner peripheral surface 2f of the outer case 2 and expands outward, as shown in FIGS. 16 (a) and 16 (b). The entire solar cell 11 curved in an arc shape is held along the inner peripheral surface 2 f of the outer case 2. Moreover, the force which presses the side surface of the solar cell contact member 40 acts on the tip part of the solar cell 11, and the solar cell is caused by the frictional force between the tip part of the solar cell 11 and the side surface of the solar cell contact member 40. 11 is prevented from lifting.

  The solar cell contact member 40 may be formed integrally with the outer case 2. Moreover, a convex part is formed in the position where the front-end | tip part of the solar cell 11 in the solar cell contact member 40 contact | abuts from the inner peripheral surface of the exterior case 2, and the front-end | tip part of the solar cell 11 is an exterior case. When a force is applied in a direction away from the inner peripheral surface of the solar cell 11, the tip of the solar cell 11 is brought into contact with the convex portion, and the tip of the solar cell 11 is brought into contact with the solar cell contact member 40. It may be prevented from coming off the contact surface.

  Thus, when the solar cell 11 is vertically assembled into the inner peripheral surface 2f of the outer case 2, by holding the both end portions of the solar cell 11 in contact with the side surface of the solar cell contact member 40, The entire solar cell 11 curved in an arc shape can be held in a groove between the inner peripheral surface 2f of the outer case 2 and the convex portion 2b (see FIGS. 8A and 8B).

  In the present embodiment described above, the circuit board protruding portion 10a is provided on the circuit board 10 so as to protrude from the timepiece movement 9 in plan view, but both sides of the solar cell 11 shown in FIGS. The configuration in which the solar cell contact member 40 that holds the vicinity of the tip portion is provided can also be applied to an electronic timepiece in which the circuit board 10 does not have the circuit board protrusion 10a.

  In addition, as shown in FIG. 17, in the electronic timepiece 1 described above, the bottom surface of the turn ring 8 formed integrally with the windshield member 3 and the inner surface of the windshield member 3 on the solar cell side may be textured to provide the texture 34. Good. By providing the embossing 34 on the lower surface of the facing ring 8 and the inner surface of the windshield member 3 on the solar cell side, the light transmittance of the embossed portion 34 is lowered, and the connection springs 12a and 12b and the windshield member 3 When looking around the “6 o'clock” portion of the dial 4 from above the center side through the lower surface of the ring 8, the extraction electrodes 11 d and 11 e of the solar cell 11 and the solar cell side end portions of the connection springs 12 a and 12 b are visible. Can be difficult. That is, the embossing 34 is a transmittance lowering unit that reduces the light transmittance.

  Furthermore, the counter ring 8 can be made thicker on the outer case 2 side, and the embossed portions can be brought closer to the extraction electrodes 11d and 11e side of the solar cell 11 to make these portions less visible.

  The embossing 34 may be provided over the entire circumference of the lower surface of the dial ring 8, but it may be only near “6 o'clock” of the dial 4 (near the extraction electrodes 11 d and 11 e of the solar cell 11). In addition to the texture, the lower surface of the turning ring 8 may be coated with, for example, black or mirror-like paint as a transmittance lowering unit.

  Moreover, in the said embodiment, although it was the structure which formed the turning ring 8 integrally in the back side (dial plate 4 side) of the windshield member 3, as shown in FIG. 18, it consists of a transparent resin material. The turn ring 35 formed separately may be disposed on the back side (the dial 4 side) of the windshield member 3 with an adhesive.

  Further, in this case, the outer case 2 is turned around so as to correspond to the recesses (not shown) near the 2 o'clock, 4 o'clock, 8 o'clock and 10 o'clock positions formed in the frame-like portion surrounding the dial 4. A boss or a protrusion may be formed on the lower surface of the ring 35, and the counter ring 35 may be positioned by the recess and the boss or protrusion so that the counter ring 35 is incorporated without being bonded.

  Even in this case, the transmittance lowering means (for example, wrinkle, black, etc.) is located on the upper surface or the lower surface of the facing ring 35 or the surface where the upper surface of the facing ring 35 of the windshield member 3 is in contact with the connection springs 12a and 12b. Or mirror-like paint).

  Further, as shown in FIG. 19, a reflective layer 36 having a high light reflectance may be provided near the outer periphery of the surface of the dial 4 and on the lower surface of the dial ring 8. In this case, a part of the light transmitted through the windshield member 3 is reflected by the reflective layer 36 and is incident on the solar cell 11 (power generation region 11b), so that the light receiving efficiency can be increased.

  The reflective layer 36 may be provided on either the outer periphery of the surface of the dial 4 or the lower surface of the dial ring 8.

  Moreover, in the said embodiment, although it was the structure which ultrasonically welded the windshield member 3 which consists of transparent resin materials to the step part of the inner peripheral surface of the exterior case 2 which consists of resin materials, in addition to this, this windshield member 3 is attached. You may make it adhere | attach to the step part of the inner peripheral surface of the exterior case 2 by laser welding. In the case where the components constituting the electronic timepiece 1 are affected by the vibration applied to the electronic timepiece 1 by the ultrasonic welding described above, such as the quartz crystal of the crystal unit being damaged, it may be bonded by laser welding.

  In addition, as shown in FIGS. 5 and 9, in the embodiment, outside of the dial 4 near “6 o'clock”, the extraction electrodes 11d and 11e of the solar cell 11 and the solar cell side ends of the connection springs 12a and 12b are provided. The part is located. Therefore, the “4 o'clock” vicinity of the dial 4 is protruded outward, and the protruding portions 11d and 11e of the solar cell 11 and the solar cell side end portions of the connection springs 12a and 12b are covered with the protruding portion so that it is difficult to see. You may make it do.

  Moreover, in the said embodiment, although the board | substrate side edge part of the connection springs 12a and 12b was comprised so that the circuit board protrusion part 10a might be pressed to the dial 4 side, the board | substrate side edge part of the connection springs 12a and 12b is comprised. You may comprise so that the circuit board protrusion part 10a may be pressed on the opposite side to the dial 4. In this case, connection terminal portions 29a and 29b are provided on the surface of the circuit board protruding portion 10a on the dial plate 4 side, and the capacitor 28 and the like are mounted on the surface of the substrate protruding portion 10a opposite to the dial plate 4.

  In addition to the connection springs 12a and 12b, for example, a lead wire, an FPC, a coiled spring, or the like may be used as means for connecting the connection terminal portions 29a and 29b and the extraction electrodes 11d and 11e.

  In the above-described embodiment, the capacitor 28 is mounted on the circuit board protruding portion 10a of the circuit board 10 corresponding to the newly arranged solar cell 11. However, other than this, for example, a character as a circuit element is used. It is also possible to newly arrange a plate illumination LED. In that case, an electronic component such as an LED current limiting resistor or a transistor may be mounted on the board protruding portion 10a of the circuit board 10.

  Moreover, in the said embodiment, although the solar cell 11 was arrange | positioned perpendicularly | vertically with respect to the surface of the dial 4, you may arrange | position with respect to the dial at a predetermined angle other than perpendicular | vertical. In this case, the inner peripheral surface of the outer case 2 may be inclined with respect to the surface of the dial 4 at a predetermined angle.

DESCRIPTION OF SYMBOLS 1 Electronic timepiece 2 Exterior case 2f Inner peripheral surface 2g Groove part 3 Windshield member (windshield)
4 Dial 8 Turn ring (presser member, extension)
9 Clock Movement 10 Circuit Board 10a Circuit Board Projection 11 Solar Cell (Circuit Element)
12a, 12b Connection spring 20 Ground plate 21 Train wheel 22 Drive motor 22a Drive coil 23 Secondary battery 24 Crystal oscillator 27 Control IC
28 Capacitors (electronic parts)
40 Solar cell contact member (contact part)

Claims (12)

In an electronic timepiece having a circuit board on which an electronic component for electrically driving a timepiece movement is mounted, and the timepiece movement is disposed between the back side of the dial and the back cover in an exterior case,
A circuit element is arranged outside the timepiece movement, and the circuit board protrudes from the outer shape of the timepiece movement excluding the circuit board in a plan view as seen from the plane side of the timepiece movement. A portion is provided on the circuit board,
An electronic timepiece having a connection member for electrically connecting a connection terminal portion provided on one surface of the circuit board protruding portion and the circuit element.   The circuit element is disposed in a vertical manner on the outside of the dial along the inner peripheral surface of the outer case, or is inclined at a predetermined angle with respect to the dial. The electronic timepiece according to claim 1, wherein: The outer peripheral surface of the outer case has a shape that swells outward, and along the inner peripheral surface of the outer case, a contact portion that contacts the end of the solar cell is provided,
3. The electronic timepiece according to claim 2, wherein the contact portion is disposed at a position where a force that expands toward the outside of the outer case is applied to the solar cell.   4. The electronic timepiece according to claim 1, wherein an electronic component corresponding to the circuit element is mounted on the other surface of the protruding portion of the circuit board. 5. The electronic component has an elongated outer shape in a plan view of the circuit board when mounted on the circuit board,
The mounting pattern for mounting the electronic component is formed on the circuit board protruding portion so that the electronic component is mounted to be inclined with respect to the protruding direction of the circuit board protruding portion. Electronic watch. The electronic timepiece further has a windshield disposed on the side opposite to the back cover side with respect to the dial,
The connection terminal portion of the circuit board protruding portion is positioned on the back cover side in the exterior case, and the substrate side end portion of the connection member formed in a plate spring shape is pressed against the dial side. Abutting on the connection terminal,
The dial is bonded to the periphery of the timepiece movement in the exterior case with an adhesive member having elasticity, and the outer peripheral surface side of the dial on the windshield side is pressed with a presser member provided inside the windshield. The electronic timepiece according to any one of claims 1 to 5, wherein the electronic timepiece is provided.   The electronic timepiece according to claim 6, wherein the pressing member is an extending portion formed integrally with an outer peripheral portion on a rear surface side of the windshield.   The electronic timepiece according to claim 6, wherein the pressing member is a member formed as a separate member bonded to an outer peripheral portion of the rear surface side of the windshield.   8. The electron according to claim 7, wherein a transmittance lowering means for reducing the light transmittance is provided at least on a portion of the surface of the extension portion that is in contact with the dial plate where the connecting member is located. clock.   At least in the part where the connecting member is located on the surface of the member formed separately from the dial plate side and / or the windshield side, or the surface of the windshield contacting the member formed by the separate member, 9. The electronic timepiece according to claim 8, further comprising a transmittance lowering unit that lowers the transmittance.   The electronic timepiece according to claim 1, wherein a reflective layer is provided on an outer peripheral portion of the windshield side surface of the dial.   The electronic timepiece according to claim 7 or 8, wherein a reflective layer is provided on a surface of the pressing member that contacts the dial.