JP2018054598A - Movement and timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movement capable of ensuring the generation efficiency of a solar panel.SOLUTION: A movement includes: a main shaft to which a main pointer is attached; a scale 23 disposed around the main shaft; a first small display area 22A to a fourth small display area 22D formed with a shielding portion shielding light incident from the outside; a solar panel 40 which receives the light of the outside, includes a plurality of cells 42A-42F divided by division lines L1-L6 passing through the scale 23, and is formed to make the plurality of cells 42A-42F similar in an area except for a projection area of the shielding portion; and a connecting portion 43 which electrically connects the plurality of cells 42A-42F, and is installed at a position overlapped on the scale 23.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a movement and a timepiece.

  Conventionally, there are watches equipped with solar panels that can generate electricity by receiving light from the outside. In this type of timepiece, the secondary battery is charged with the power generated by the solar panel, and the motor that drives the hands is controlled using the power charged in the secondary battery.

  A solar panel provided in a watch may have a plurality of cells. For example, Patent Document 1 discloses a solar panel having a plurality of cells divided by dividing lines extending linearly. Patent Document 2 discloses a solar panel having a plurality of cells divided by parting lines that are partially curved. Patent Document 3 discloses a solar panel having a plurality of cells that are divided by bent dividing lines so as to avoid openings for liquid crystal display. Patent Document 4 discloses a solar panel having a plurality of cells divided by dividing lines extending in a spiral shape.

  In a solar panel having a plurality of cells, the plurality of cells are connected in series in order to output a voltage necessary for charging the secondary battery. As a method of connecting the cells in series, for example, there is a method of electrically connecting the cells to each other by a connection portion formed of a conductive material.

JP 2002-122682 A Japanese Patent Laying-Open No. 2015-60907 Japanese Patent No. 5238433 JP 2014-169916 A

  By the way, when a plurality of cells are connected in series, the output voltage of the solar panel is the sum of the output voltages of the respective cells. On the other hand, the output current of the solar panel is the same as the smallest value among the output currents of the individual cells. For this reason, in order to improve the power generation efficiency of the solar panel, the light receiving area of each cell is secured to increase the output current of each cell and the variation in the light receiving area between the cells is suppressed. It is necessary to level the output current between.

However, a member for displaying a scale for displaying the time and various information such as a remaining battery level may be provided at a position facing the light receiving surface of the solar panel. In this case, since the scale and the member have light shielding properties, the light receiving surface of the solar panel may be shaded, and the light receiving area of each cell may be reduced or the light receiving area between the cells may vary. There is.
Therefore, in the conventional technology, there is room for improvement in terms of ensuring a larger light receiving area of each cell and suppressing variation in the light receiving area between the cells to ensure power generation efficiency of the solar panel. .

  Therefore, the present invention provides a movement and a timepiece capable of ensuring the power generation efficiency of a solar panel.

  The movement of the present invention includes a main shaft to which a main pointer is attached, an index arranged around the main shaft, a small display area in which a light-shielding portion that blocks light incident from the outside is formed, and light from the outside. A solar panel for receiving, comprising a first cell and a second cell divided along a dividing line passing through the indicator, wherein the first cell and the second cell exclude a projected area of the light shielding portion A solar panel formed to be equivalent in area, and a connection part that electrically connects the first cell and the second cell and is installed at a position overlapping the indicator, To do.

According to the present invention, the solar panel is formed so that the first cell and the second cell are equivalent in the area excluding the projected area of the light shielding portion, and thus the light receiving area of the first cell and the second cell. The variation of can be suppressed. Thereby, the output current of a 1st cell and a 2nd cell is leveled, and the fall of the output current of a solar panel can be suppressed.
In addition, since the movement includes a connection portion that is electrically connected to the first cell and the second cell and is installed at a position overlapping the indicator, a portion shielded by the indicator when light is incident thereon, and a solar cell A portion of the panel that is shielded from light by the connecting portion and cannot generate power can be overlapped. Thereby, the area of the part shielded by the index formed in the first cell and the second cell can be reduced. Therefore, it is possible to secure a larger light receiving area of the first cell and the second cell.
As described above, the power generation efficiency of the solar panel in the timepiece can be ensured.

  In the above-described movement, it is preferable that the first cell and the second cell are formed so that output currents generated by receiving light in an area excluding a projected area of the light shielding portion are equal.

  According to the present invention, since the output currents of the first cell and the second cell are leveled, a decrease in the output current of the solar panel can be suppressed. Therefore, the power generation efficiency of the solar panel in the watch can be ensured.

  In the movement described above, it is preferable that the dividing line is formed so as to overlap the light shielding portion.

  According to the present invention, it is possible to overlap the light shielding portion and the portion of the solar panel that cannot generate power that extends along the dividing line. Thereby, the area of the part light-shielded by the light-shielding part in the first cell and the second cell can be reduced. Therefore, the light receiving areas of the first cell and the second cell can be more efficiently ensured. Therefore, the power generation efficiency of the solar panel in the watch can be ensured.

  In the above-described movement, it is desirable that the sub-pointer can be arranged in the small display area, and the dividing line is provided at a position that does not overlap the movement locus of the sub-pointer.

  According to the present invention, it is possible to prevent the auxiliary pointer from moving beyond the dividing line. Thereby, it can prevent that the part light-shielded by the moving sub pointer | guide moves across between a 1st cell and a 2nd cell. Therefore, the fluctuation | variation of the light reception area of a 1st cell and a 2nd cell is suppressed, and the power generation efficiency of a solar panel can be stabilized.

  In the above-described movement, it is preferable that outer edges of the first cell and the second cell are arranged outside a radially inner end portion of the main shaft in the index.

  According to the present invention, the first cell and the second cell can be formed wider than the configuration in which the outer edges of the first cell and the second cell are arranged radially inward of the index. A larger light receiving area of the cell can be secured. Therefore, the power generation efficiency of the solar panel in the watch can be ensured.

  In the above-described movement, the solar panel is preferably formed so that the first cell and the second cell are equivalent in an area excluding the projected area of the light shielding portion and the index.

  According to the present invention, in the configuration in which the solar panel is shielded from light by the light shielding portion and the index, it is possible to suppress variation in the light receiving area between the first cell and the second cell. Thereby, the output current of a 1st cell and a 2nd cell is leveled, and the fall of the output current of a solar panel can be suppressed. Therefore, the power generation efficiency of the solar panel in the watch can be ensured.

  In the above movement, it is preferable that the dividing line is longer than a linear distance from the main axis to the index.

  According to the present invention, the member that insulates the first cell and the second cell arranged along the dividing line is arranged longer than the configuration in which the dividing line extends along the line segment connecting the main axis and the index. Can do. Thereby, since it becomes difficult to bend a solar panel, it becomes possible to assemble | attach a solar panel easily.

  In the above movement, it is desirable that the indicator displays time.

  ADVANTAGE OF THE INVENTION According to this invention, the power generation efficiency of a solar panel is securable in the movement provided with the scale for displaying time as a parameter | index.

  A timepiece according to the present invention includes the above-described movement.

  According to the present invention, since the above-described movement is provided, for example, a motor that drives the main pointer can be stably controlled. Therefore, stable operation of the watch can be realized.

  According to the present invention, the power generation efficiency of a solar panel in a timepiece can be ensured.

It is an external view of the timepiece of the embodiment. It is the top view which looked at the solar panel of embodiment from the dial side. It is sectional drawing in the III-III line of FIG. It is a block diagram of the charge system of an embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a timepiece according to the embodiment.
As shown in FIG. 1, the timepiece 1 is an analog electronic timepiece, and includes a movement 10 having a dial unit 20 in a timepiece case 2. The watch case 2 is formed of a case main body 3, a case back cover (not shown), and glass 4. The watch 1 can communicate with a device outside the watch (for example, a smartphone) using a communication method of, for example, Bluetooth (registered trademark) Low Energy (BLE) standard or Wi-Fi (Wireless Fidelity) standard. ing.

  Various pointers are arranged between the dial unit 20 and the glass 4. The various hands are arranged with a main hand indicating the time (hour hand 5a, minute hand 5b and second hand 5c) and a sub-hand indicating the remaining time indicated by the main hand (remaining amount hand 6a, small hour hand 6b and small minute hand 6c). Has been. The timepiece 1 also includes a crown 7 and a pair of operation switches 8. The crown 7 and the pair of operation switches 8 are provided on the side of the watch case 2. The crown 7 and the pair of operation switches 8 are used, for example, for time correction and function switching. In the following description, the glass 4 side of the watch case 2 with respect to the dial unit 20 is referred to as a “dial plate side”, and the back side of the case is referred to as a “back cover side”.

  The movement 10 includes a movement main body 11 and a dial unit 20 arranged on the dial side of the movement main body 11. The movement main body 11 includes a main shaft 12 to which the above-mentioned main pointer is attached, a sub-shaft 13 to which the above-described sub-pointer is attached, a motor (not shown) for driving the main shaft 12 and the sub-shaft 13, and a driving force of the motor to the main shaft. 12 and the sub-shaft 13 are mainly provided with a train wheel (not shown) and a secondary battery 15 (see FIG. 4) for supplying electric power for controlling the motor.

  The main shaft 12 includes an hour wheel 12a to which the hour hand 5a is attached, a second wheel 12b to which the minute hand 5b is connected, and a fourth wheel 12c to which the second hand 5c is connected. The hour wheel 12a, the second wheel 12b, and the fourth wheel 12c are arranged on the same axis. The hour wheel 12 a, the second wheel 12 b and the fourth wheel 12 c protrude toward the dial side and penetrate the dial unit 20. The countershaft 13 includes a first countershaft 13a to which the remaining amount indicator 6a is attached, a second countershaft 13b to which the small hour hand 6b is attached, and a third countershaft 13c to which the small minute hand 6c is attached. Each auxiliary shaft 13 is provided in parallel with the main shaft 12. Each countershaft 13 protrudes toward the dial side and passes through the dial unit 20. The second auxiliary shaft 13b and the third auxiliary shaft 13c are provided on the same axis. In the following description, the axial direction of the main shaft 12 is simply referred to as “axial direction”, the circumferential direction around the main shaft 12 is simply referred to as “circumferential direction”, and is radial from the axis O of the main shaft 12 perpendicular to the axial direction. The extending direction is referred to as “radial direction”. Moreover, the clockwise direction seen from the dial side among the circumferential directions is called a CW direction.

  The dial unit 20 is formed in a circular shape when viewed from the axial direction, and is arranged coaxially with the main shaft 12. The dial unit 20 is provided so as to be visible through the glass 4. The dial unit 20 is provided over the entire circumference of the main axis 12 and displays a time, and a plurality of small display areas that are provided in the main display area 21 as viewed in the axial direction and display various information. 22A-22D.

  A plurality of scales (indexes) 23 are provided in the main display area 21. The plurality of scales 23 are indices indicating time, and are arranged at predetermined time positions around the spindle 12. In the present embodiment, twelve graduations 23 are provided at equal intervals in the circumferential direction. The main display area 21 displays time by a plurality of scales 23, an hour hand 5a, a minute hand 5b, and a second hand 5c. A date window 9 is formed inside the scale 23 provided at a position indicating 3 o'clock. Inside the date window 9, characters indicating the date are arranged so as to be visible.

The plurality of small display areas 22A to 22D include a first small display area 22A, a second small display area 22B, a third small display area 22C, and a fourth small display area 22D.
The first small display area 22A is provided at a position indicating 12:00 in the circumferential direction. A character string 24 is formed in the first small display area 22A. The first small display area 22A displays character information such as a manufacturer name and a product name.

  The second small display area 22B is provided at a position indicating 6 o'clock in the circumferential direction. An annular first ring member 25 is provided in the second small display area 22B. The first ring member 25 is disposed coaxially with the first auxiliary shaft 13a. A remaining amount indicator 6a is disposed inside the first ring member 25 as viewed from the axial direction. The movement trajectory of the remaining amount indicator 6a is located inside the first ring member 25 when viewed from the axial direction. The second small display area 22B displays the remaining battery level by the first ring member 25 and the remaining amount indicator 6a.

  The third small display area 22C is provided at a position between 9 o'clock and 10 o'clock in the circumferential direction. In the third small display region 22C, an annular second ring member 28 and a plurality of small scales 29 arranged at equal intervals on the inner periphery of the second ring member 28 are provided. The second ring member 28 is disposed coaxially with the second auxiliary shaft 13b and the third auxiliary shaft 13c. A small hour hand 6b and a small minute hand 6c are arranged inside the second ring member 28 as viewed from the axial direction. The movement trajectories of the small hour hand 6b and the small minute hand 6c are located inside the second ring member 28 when viewed from the axial direction. The third small display area 22C displays a time in a region different from the time shown in the main display area 21 by a 12-hour system by a plurality of small scales 29, small hour hand 6b and small minute hand 6c.

  The fourth small display area 22D is provided at the same position as the scale 23 in the radial direction over the entire circumference in the circumferential direction. In the fourth small display area 22D, a plurality of symbol bodies 31 to 35 are provided side by side in the circumferential direction. The first symbol body 31 is provided between a scale 23 indicating 1 o'clock and a scale 23 indicating 2 o'clock. The second symbol body 32 is provided between the scale 23 indicating 4 o'clock and the scale 23 indicating 5 o'clock. The third symbol body 33 is provided between a scale 23 indicating 7 o'clock and a scale 23 indicating 8 o'clock. The fourth symbol body 34 is provided between the scale 23 indicating 8 o'clock and the scale 23 indicating 9 o'clock. The fifth symbol body 35 is provided between a scale 23 indicating 10:00 and a scale 23 indicating 11:00.

  The fourth small display area 22D displays the information related to the communication function or the information related to power as the information related to the function of the timepiece 1 by the symbol bodies 31 to 35 and the second hand 5c. Specifically, the first symbol body 31 displays that the communication with the device outside the timepiece has been successful by combination with the second hand 5c. The second symbol body 32 displays that the communication with the device outside the watch has failed due to the combination with the second hand 5c. The third symbol body 33 indicates that the remaining battery level is equal to or lower than a predetermined level in combination with the second hand 5c. The fourth symbol body 34 indicates that communication with a device outside the watch is necessary or is in communication with the second hand 5c. The fifth symbol body 35 indicates that communication with a device outside the watch is prohibited by combination with the second hand 5c.

  The plurality of small display areas are not limited to only the small display areas 22A to 22D described above, and include, for example, a fifth small display area (not shown) that indicates the time shown in the third small display area 22C in a 24-hour format. You may go out. In this case, an annular ring member is provided in the fifth small display area as in the case of the third small display area 22C, and the fifth small display area displays the time using a ring member and a sub-pointer (not shown). . The fifth small display area is provided, for example, between the second small display area 22B and the third small display area 22C.

Hereinafter, a specific configuration of the dial unit 20 will be described.
The dial unit 20 includes a solar panel 40 that can generate power by receiving light from the outside, and a dial plate 50 that is disposed to face a light receiving surface 41 (see FIG. 2) of the solar panel 40.
The dial plate 50 is disposed on the light receiving surface side of the solar panel 40. The dial 50 includes a main body 51 formed in a disc shape, and the above-described plural scales 23, character strings 24, first ring member 25, and second ring member 28 arranged on the dial side of the main body 51. , A plurality of small scales 29, and a plurality of symbol bodies 31 to 35. In the following description, the character string 24, the first ring member 25, the second ring member 28, the small scale 29, and the plurality of symbol bodies 31 to 35 are collectively referred to as a “light-shielding portion”.

The main body 51 is made of a light transmissive material. As the light-transmitting material, for example, glass or a resin material can be used.
The scale 23 and the above-described light shielding portion are formed of, for example, a metal material or a resin material. The scale 23 and the light shielding unit shield light incident from the outside toward the light receiving surface 41 of the solar panel 40.

FIG. 2 is a plan view of the solar panel of the embodiment as viewed from the dial side. In FIG. 2, the scale 23, the light shielding portion, and the auxiliary pointer are projected onto the light receiving surface 41 of the solar panel 40 and indicated by a two-dot chain line.
As shown in FIG. 2, the solar panel 40 is arranged with the light receiving surface 41 facing the dial side. The solar panel 40 is formed in a disk shape having substantially the same diameter as the dial 50 (see FIG. 1). The solar panel 40 includes a plurality (six in this embodiment) of cells 42A to 42F connected in series and a plurality (five in this embodiment) of cells 42A to 42F electrically connected to each other. And a connection portion 43.

  The plurality of cells 42A to 42F are arranged in the circumferential direction. The plurality of cells 42A to 42F are divided along the same number of dividing lines L1 to L6 as the plurality of cells 42A to 42F. The dividing lines L1 to L6 extend from the axis O of the main shaft 12 (see FIG. 1) when viewed from the axial direction and pass through the scale 23. The outer edges (radially outer edges) of the cells 42 </ b> A to 42 </ b> F are disposed on the radially outer side than the radially inner ends of the scales 23.

  The first dividing line L1 divides the cell 42F and the cell 42A. The first dividing line L1 extends from the main shaft 12 toward the scale 23 indicating 12:00 when viewed from the axial direction. The first dividing line L1 extends so as to avoid the first small display area 22A at a downstream position in the CW direction when viewed from the axial direction. The dividing line L1 is longer than the linear distance from the main axis 12 to the scale 23 indicating 12:00.

The second dividing line L2 divides the cell 42A and the cell 42B. The second dividing line L2 extends from the main shaft 12 toward the scale 23 indicating 2 o'clock when viewed in the axial direction. The dividing line L2 is longer than the linear distance from the main axis 12 to the scale 23 indicating 2 o'clock.
The third dividing line L3 divides the cell 42B and the cell 42C. The third dividing line L3 extends from the main shaft 12 toward the scale 23 indicating 4 o'clock when viewed from the axial direction. The dividing line L3 is longer than the linear distance from the main axis 12 to the scale 23 indicating 4 o'clock.

  The fourth dividing line L4 divides the cell 42C and the cell 42D. The fourth dividing line L4 extends from the main shaft 12 toward the scale 23 indicating 6:00 when viewed from the axial direction. The fourth dividing line L4 extends so as to avoid the movement locus of the remaining amount pointer 6a in the second small display region 22B at the downstream position in the CW direction when viewed from the axial direction. The fourth dividing line L4 extends through a position overlapping the first ring member 25 of the second small display area 22B when viewed from the axial direction. The dividing line L4 is longer than the linear distance from the main axis 12 to the scale 23 indicating 6 o'clock.

  The fifth dividing line L5 divides the cell 42D and the cell 42E. The fifth dividing line L5 extends from the main shaft 12 toward the scale 23 indicating 8:00 when viewed from the axial direction. The fifth dividing line L5 extends so as to avoid the movement locus of the small hour hand 6b and the small minute hand 6c in the third small display region 22C at the upstream position in the CW direction when viewed from the axial direction. The fifth dividing line L5 extends through a position overlapping the second ring member 28 of the third small display region 22C when viewed from the axial direction. The dividing line L5 is longer than the linear distance from the main shaft 12 to the scale 23 indicating 8:00.

  The sixth dividing line L6 divides the cell 42E and the cell 42F. The sixth dividing line L6 extends from the main shaft 12 toward the scale 23 indicating 10 o'clock when viewed from the axial direction. The sixth dividing line L6 is arranged so as to avoid the movement locus of the small hour hand 6b and the small minute hand 6c in the third small display area 22C at the downstream position in the CW direction when viewed from the axial direction. 22A extends to avoid the upstream position in the CW direction. The sixth dividing line L6 extends through a position overlapping the second ring member 28 of the third small display region 22C when viewed from the axial direction. The dividing line L6 is longer than the linear distance from the main axis 12 to the scale 23 indicating 10:00.

FIG. 3 is a cross-sectional view taken along line III-III in FIG.
As shown in FIGS. 2 and 3, each of the cells 42 </ b> A to 42 </ b> F is formed by laminating the reflective electrode layer 44, the photoelectric conversion layer 45, and the upper electrode layer 46 on the base material 47 in this order. ing. The base material 47 is formed of a resin film such as polyethylene naphthalate or polyimide. The reflective electrode layer 44 is formed of a metal material such as aluminum, silver, or titanium. The photoelectric conversion layer 45 is formed by laminating an n-type amorphous silicon layer 45a, an i-type amorphous silicon layer 45b, and a p-type amorphous silicon layer 45c on the reflective electrode layer 44 in this order. The upper electrode layer 46 is a transparent conductive film made of, for example, ITO.

  The reflective electrode layer 44 and the photoelectric conversion layer 45 of the cells 42A to 42F adjacent in the circumferential direction are divided by an insulating material layer 48 extending along the dividing lines L1 to L6. Note that the insulating material layer 48 may be further divided to further improve the insulation between cells. Further, the upper electrode layer 46 of each cell 42A to 42E located on the downstream side in the CW direction of each of the dividing lines L1 to L5 extends over the insulating material layer 48 toward the downstream side in the CW direction, and adjacent cells 42B to 42B. It is laminated on the photoelectric conversion layer 45 of 42F. A portion of the upper electrode layer 46 extending over the insulating material layer 48 toward the downstream side in the CW direction is electrically connected to the lower reflective electrode layer 44 by the connection portion 43.

  The connection part 43 is made of, for example, a conductive material. The connecting portion 43 is applied on the upper electrode layer 46 and thereby provided in a through hole 49 that penetrates the upper electrode layer 46, the photoelectric conversion layer 45, and the reflective electrode layer 44 in the axial direction. Thereby, a pair of cells 42A to 42F adjacent to each other across the dividing lines L1 to L5 are electrically connected, and a plurality of cells 42A to 42F are connected in series.

  As shown in FIG. 2, each connection part 43 is installed in the position which overlaps with the scale 23 seeing from an axial direction. The connecting portion 43 that electrically connects the cell 42A and the cell 42B divided by the second dividing line L2 is installed at a position overlapping the scale 23 indicating 2 o'clock. The connection portion 43 that electrically connects the cell 42B and the cell 42C divided by the third dividing line L3 is installed at a position overlapping the scale 23 indicating 4 o'clock. The connecting portion 43 that electrically connects the cell 42C and the cell 42D divided by the fourth dividing line L4 is installed at a position overlapping the scale 23 indicating 6 o'clock. The connection portion 43 that electrically connects the cell 42D and the cell 42E divided by the fifth dividing line L5 is installed at a position overlapping the scale 23 indicating 8 o'clock. The connection portion 43 that electrically connects the cell 42E and the cell 42F divided by the sixth dividing line L6 is installed at a position overlapping the scale 23 indicating 10:00.

  Each of the cells 42A to 42F is formed so that the above-described scale 23 and the area excluding the projected area of the light shielding portion (hereinafter referred to as light receiving area) are equal. Thereby, each cell 42A-42F produces | generates by receiving light in the area except the scale 23 and the projection area of the light-shielding part, when light injects into the dial unit 20 along an axial direction. It is formed so that the currents are equal. The projected area referred to here is an area of a shadow formed when light is incident on the dial unit 20 along the axial direction. Therefore, the light receiving area is an area of a portion where the light in each of the cells 42A to 42F hits when light is incident on the dial unit 20 along the axial direction.

Specifically, the light receiving areas of the cells 42A to 42F are calculated as follows.
The cell 42A located between the first dividing line L1 and the second dividing line L2 shows a part of the scale 23 indicating 12 o'clock, the scale 23 indicating 1 o'clock, and 2 o'clock when viewed from the axial direction. A part of the scale 23 and the first symbol body 31 of the fourth small display area 22D overlap. For this reason, the light receiving area of the cell 42A is based on the area of the light receiving surface of the cell 42A, and the projected area of the portion overlapping the cell 42A when viewed from the axial direction in the scale 23 indicating 12:00 and the projection of the scale 23 indicating 1 o'clock. This is an area obtained by subtracting the projected area of the portion overlapping the cell 42A when viewed from the axial direction and the projected area of the first symbol body 31 of the fourth small display area 22D in the scale 23 indicating 2 o'clock.

  The cell 42B located between the second dividing line L2 and the third dividing line L3 shows a part of the scale 23 indicating 2 o'clock, the scale 23 indicating 3 o'clock, and 4 o'clock when viewed from the axial direction. A part of the scale 23 overlaps. For this reason, the light receiving area of the cell 42B is based on the area of the light receiving surface of the cell 42B, and the projected area of the portion overlapping the cell 42B in the scale 23 indicating 2 o'clock and the projection of the scale 23 indicating 3 o'clock. This is the area obtained by subtracting the area and the projected area of the portion overlapping the cell 42B when viewed from the axial direction in the scale 23 indicating 4 o'clock.

  The cell 42C located between the third dividing line L3 and the fourth dividing line L4 shows a part of the scale 23 indicating 4 o'clock, the scale 23 indicating 5 o'clock, and 6 o'clock when viewed from the axial direction. Part of the scale 23, part of the first ring member 25 in the second small display area 22 </ b> B, and the second symbol body 32 in the fourth small display area 22 </ b> D overlap. For this reason, the light receiving area of the cell 42C is based on the area of the light receiving surface of the cell 42C, of the scale 23 indicating 4 o'clock, the projected area of the portion overlapping the cell 42C when viewed from the axial direction, and the projection of the scale 23 indicating 5 o'clock. Area, projected area of a portion of the scale 23 indicating 6 o'clock that overlaps the cell 42C when viewed from the axial direction, and portion of the first ring member 25 of the second small display region 22B that overlaps the cell 42C when viewed from the axial direction Is the area obtained by subtracting the projected area of the second symbol body 32 of the fourth small display region 22D.

  The cell 42D located between the fourth dividing line L4 and the fifth dividing line L5 shows a part of the scale 23 indicating 6 o'clock, the scale 23 indicating 7 o'clock, and 8 o'clock when viewed from the axial direction. Part of the scale 23, part of the first ring member 25 in the second small display area 22B, part of the second ring member 28 in the third small display area 22C, and third part of the fourth small display area 22D. The symbol body 33 overlaps. For this reason, the light receiving area of the cell 42D is based on the area of the light receiving surface of the cell 42D, and the projected area of the scale 23 that overlaps the cell 42D when viewed from the axial direction in the scale 23 indicating 6 o'clock and the projection of the scale 23 indicating 7 o'clock. Area, projected area of a portion of the scale 23 indicating 8 o'clock that overlaps the cell 42D when viewed from the axial direction, and portion of the first ring member 25 of the second small display region 22B that overlaps the cell 42D when viewed from the axial direction Of the second ring member 28 of the third small display area 22C, the projected area of the portion overlapping the cell 42D when viewed from the axial direction, and the projected area of the third symbol body 33 of the fourth small display area 22D This is the area minus.

  The cell 42E located between the fifth dividing line L5 and the sixth dividing line L6 shows a part of the scale 23 indicating 8 o'clock, the scale 23 indicating 9 o'clock, and 10 o'clock when viewed from the axial direction. A part of the scale 23, a part of the second ring member 28 of the third small display area 22C, a small scale 29 of the third small display area 22C, a fourth symbol body 34 of the fourth small display area 22D, Are overlapping. For this reason, the light receiving area of the cell 42E is based on the area of the light receiving surface of the cell 42E, and the projected area of the portion overlapping the cell 42E when viewed from the axial direction in the scale 23 indicating 8 o'clock and the projection of the scale 23 indicating 9 o'clock. Area, projected area of the portion of the scale 23 indicating 10 o'clock that overlaps the cell 42E when viewed from the axial direction, and portion of the second ring member 28 of the third small display region 22C that overlaps the cell 42E when viewed from the axial direction , The projected area of the small scale 29 of the third small display area 22C, and the projected area of the fourth symbol body 34 of the fourth small display area 22D are subtracted.

  The cell 42F located between the sixth dividing line L6 and the first dividing line L1 shows a part of the scale 23 indicating 10 o'clock, the scale 23 indicating 11 o'clock, and 12 o'clock when viewed from the axial direction. A part of the scale 23, a character string 24 in the first small display area 22A, a part of the second ring member 28 in the third small display area 22C, a fifth symbol body 35 in the fourth small display area 22D, Are overlapping. For this reason, the light receiving area of the cell 42F located between the sixth dividing line L6 and the first dividing line L1 is determined from the projected area of the light receiving surface of the cell 42F and the cell viewed from the axial direction of the scale 23 indicating 10 o'clock. The projected area of the portion overlapping with 42F, the projected area of the scale 23 indicating 11:00, the projected area of the portion of the scale 23 indicating 12:00 overlapping with the cell 42F when viewed from the axial direction, and the first small display area 22A The projected area of the character string 24, the projected area of the portion of the second ring member 28 of the third small display area 22C that overlaps the cell 42F when viewed from the axial direction, and the fifth symbol body 35 of the fourth small display area 22D. This is the area obtained by subtracting the projected area.

FIG. 4 is a block diagram of the charging system according to the embodiment.
As shown in FIG. 4, the solar panel 40 described above charges the secondary battery 15. The charging system included in the movement 10 includes a solar panel 40, a diode 61, a secondary battery 15, and an overcharge prevention circuit 62. The diode 61 prevents a current from flowing backward from the secondary battery 15 to the solar panel 40. The overcharge prevention circuit 62 includes a reference voltage circuit 63, an operational amplifier 64, and a transistor 65. The overcharge prevention circuit 62 short-circuits both ends of the solar panel 40 with a switch (not shown) when the secondary battery 15 is overcharged and exceeds a predetermined voltage. Thereby, the overcharge to the secondary battery 15 is prevented.

Thus, according to the present embodiment, the solar panel 40 is formed such that the plurality of cells 42A to 42F are equivalent in the area excluding the scale 23 and the projected area of the light shielding portion, and thus the plurality of cells 42A. Variation in the light receiving area of ~ 42F can be suppressed. Thereby, the output currents of the plurality of cells 42A to 42F are leveled, and the decrease in the output current of the solar panel 40 can be suppressed.
Further, the movement 10 includes a connection portion 43 that electrically connects the plurality of cells 42A to 42F and is installed at a position where the solar panel 40 overlaps the scale 23 when viewed from the axial direction. Of the solar panel 40 and the portion of the solar panel 40 that is shielded by the connecting portion 43 and cannot generate power. Thereby, the area of the part shielded by the scale 23 formed in the plurality of cells 42A to 42F can be reduced. Therefore, a larger light receiving area of the plurality of cells 42A to 42F can be secured.
As described above, the power generation efficiency of the solar panel 40 in the timepiece 1 can be ensured.

  In addition, since the plurality of cells 42A to 42F are formed so that the output currents generated by receiving light in the area excluding the projected area of the light shielding portion are equal, it is possible to suppress a decrease in the output current of the solar panel 40. . Therefore, the power generation efficiency of the solar panel 40 in the timepiece 1 can be ensured.

  Moreover, since the dividing lines L4 to L6 are formed so as to overlap with the light shielding portion when viewed from the axial direction, the insulating material layer 48 that cannot generate power and extends along the dividing lines L4 to L6 of the solar panel 40 with the light shielding portion. And can be stacked. Thereby, the area of the part light-shielded by the light-shielding part in the plurality of cells 42C to 42F can be reduced. Therefore, the light receiving areas of the plurality of cells 42C to 42F can be more efficiently ensured. Therefore, the power generation efficiency of the solar panel 40 in the timepiece 1 can be ensured.

The dividing lines L1 to L6 are provided at positions that do not overlap with the movement trajectory of the sub-pointers (the remaining amount pointer 6a, the small hour hand 6b, and the small minute hand 6c) when viewed from the axial direction. It is possible to prevent the pointer from moving beyond the dividing lines L1 to L6. Thereby, it can prevent that the part light-shielded by the sub pointer to move moves between each cell 42A-42F. Therefore, the variation in the light receiving area (power generation amount) of the plurality of cells 42A to 42F caused by the variation in the area of the light shielding portion due to the auxiliary pointer is suppressed, and the power generation efficiency of the solar panel 40 can be stabilized. Further, when designing the area of each of the cells 42A to 42F, it is easy to calculate the area of the light receiving region excluding the region shielded by the pointer.
Thereby, by combining with the above-described configuration in which the light shielding part by the scale 23 and the light shielding part by the connection part 43 are overlapped, a larger light receiving area in which fluctuations in the amount of power generation are suppressed can be secured.
This effect is achieved when at least one movement locus of the remaining amount pointer 6a, the small hour hand 6b, and the small minute hand 6c, which are a plurality of sub-pointers, does not overlap any of the dividing lines L1 to L6. .
Note that, as in the present embodiment, all the movement trajectories of the remaining amount pointer 6a, the small hour hand 6b, and the small minute hand 6c, which are a plurality of sub-pointers, are arranged so as not to overlap the dividing lines L1 to L6. The power generation fluctuation suppressing effect and the effective light receiving area securing effect can be further enhanced.

  In addition, the outer edges of the plurality of cells 42 </ b> A to 42 </ b> F are arranged outside the radially inner end of the scale 23. For this reason, compared with the configuration in which the outer edges of the plurality of cells are arranged radially inward of the scale, the plurality of cells 42A to 42F can be formed wider, and the light receiving areas of the plurality of cells 42A to 42F can be secured larger. . Therefore, the power generation efficiency of the solar panel 40 in the timepiece 1 can be ensured.

  Further, since the dividing lines L1 to L6 are longer than the linear distance from the main axis 12 to the scale 23, the insulating material layer is more than the configuration in which the dividing lines L1 to L6 extend along the line segment connecting the main axis 12 and the scale 23. 48 can be arranged long. Thereby, since the solar panel 40 becomes difficult to bend, the solar panel 40 can be easily assembled.

  The symbol bodies 31 to 35 of the fourth small display area 22D are provided so as to overlap with different cells 42A and 42C to 42F, respectively, when viewed from the axial direction. Thereby, by providing each symbol body 31-35, the area of the shadow which increases in each cell 42A, 42C-42F becomes substantially equal. For this reason, compared with the case where each symbol body of the fourth small display area is provided so as to overlap with one cell when viewed from the axial direction, the light receiving area when designing the areas of the cells 42A, 42C to 42F. It is easy to calculate the area. Further, since the symbol bodies 31 to 35 are provided in a distributed manner in the circumferential direction, the appearance can be improved as compared with the case where the symbol bodies of the fourth small display area are provided densely.

  In addition, when the light shielding portions are densely arranged, the shadow of the light shielding portion and the dividing line intersect in a complicated manner on the solar panel, which may make it difficult to design the light receiving region of the solar panel. In the present embodiment, all of the plurality of cells 42 </ b> A to 42 </ b> F are provided so that at least one light shielding portion overlaps when viewed in the axial direction. For this reason, it can avoid that the cell where a light-shielding part does not overlap seeing from an axial direction is provided. Thereby, in a multi-function timepiece provided with a large number of light shielding parts such as the timepiece 1 of the present embodiment, the density of the light shielding parts is suppressed when viewed from the axial direction, and the light receiving areas of the cells 42A to 42F can be easily designed. can do.

  In general, since the character string 24 in the first small display area 22A has a complicated shape as compared with a symbol body or the like, the character string 24 is arranged so as to straddle a plurality of cells when viewed from the axial direction. In this case, the calculation of the area of the light receiving region when designing the area of each cell becomes complicated. On the other hand, in the present embodiment, the character string 24 in the first small display area 22A is provided so as to overlap only the cell 42A when viewed from the axial direction, so that the character string is composed of a plurality of cells when viewed from the axial direction. As compared with the case where the cell 42A is arranged so as to straddle the cell, the area calculation of the light receiving region when designing the area of the cell 42A becomes easier.

  In addition, since the timepiece 1 of the present embodiment includes the movement 10, it is possible to stably control the motor that drives the main hands (hour hand 5a, minute hand 5b, and second hand 5c). Therefore, stable operation of the timepiece 1 can be realized.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above-described embodiment, the light receiving areas of the plurality of cells 42A to 42F are formed to be equal. However, the present invention is not limited to this, and light reception of at least a pair of cells (first cell and second cell). What is necessary is just to form so that an area may become equivalent. Thereby, compared with the case where the light-receiving area of each cell varies, the fall of the output current of a solar panel can be suppressed.

  Moreover, in the said embodiment, although the solar panel 40 is provided with the six cells 42A-42F, if the number of cells is plural, it will not be specifically limited. Further, the shape of each cell is not particularly limited.

  In the above embodiment, twelve scales 23 are provided, but the number of scales is not particularly limited. Further, since the scale 23 is an example of an index, the index is not limited to the scale 23. The scale 23 may be referred to as an abbreviation.

  Moreover, in the said embodiment, although several cell 42A-42F is formed so that it may become equal in the area except the scale 23 and the projection area of the light-shielding part, it is not limited to this. In a configuration where the scale does not overlap with the solar panel, the solar panel suppresses variations in the light receiving area of the multiple cells if the multiple cells are formed to be equal in the area excluding the projected area of the light-shielding part. it can. Therefore, the fall of the output current of a solar panel can be suppressed.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Clock 5a ... Hour hand (main pointer) 5b ... Minute hand (main pointer) 5c ... Second hand (main pointer) 6a ... Remaining amount pointer (sub-pointer) 6b ... Small hour hand (sub-pointer) 6c ... Small minute hand (sub-pointer) 10 ... Movement 12 ... Spindle 22A ... First small display area (small display area) 22B ... Second small display area (small display area) 22C ... Third small display area (small display area) 22D ... Fourth small display area (small Display area) 23 ... Scale (index) 24 ... Character string (light-shielding part) 25 ... First ring member (light-shielding part) 28 ... Second ring member (light-shielding part) 29 ... Small scale (light-shielding part) 31 ... First symbol Body (light-shielding part) 32 ... 2nd symbol body (light-shielding part) 33 ... 3rd symbol body (light-shielding part) 34 ... 4th symbol body (light-shielding part) 35 ... 5th symbol body (light-shielding part) 40 ... Solar panel 42A , 42B, 42C, 42D, 42E, 42F ... 43 ... connecting portion L1, L2, L3, L4, L5, L6 ... dividing line

Claims (9)

A main shaft to which the main pointer is attached;
Indicators arranged around the main axis;
A small display area in which a light shielding part for shielding light incident from the outside is formed;
A solar panel that receives light from the outside, including a first cell and a second cell that are divided along a dividing line that passes through the indicator, wherein the first cell and the second cell A solar panel formed to be equivalent in the area excluding the projected area;
Electrically connecting the first cell and the second cell, and a connecting portion installed at a position overlapping the indicator;
A movement characterized by comprising.   The said 1st cell and the said 2nd cell are formed so that the output current produced by receiving light in the area except the projection area of the said light-shielding part may become equal. Movement.   The movement according to claim 1, wherein the dividing line is formed to overlap the light shielding portion. In the small display area, a secondary pointer can be arranged,
The movement according to any one of claims 1 to 3, wherein the dividing line is provided at a position that does not overlap a movement locus of the auxiliary pointer.   5. The outer edge of each of the first cell and the second cell is disposed on the outer side of the radially inner end portion of the main shaft of the index. 6. Movement.   6. The solar panel according to claim 1, wherein the first cell and the second cell are formed so as to be equivalent in an area excluding a projected area of the light shielding portion and the index. The movement according to any one of the above.   The movement according to any one of claims 1 to 6, wherein the dividing line is longer than a linear distance from the main axis to the index.   The movement according to any one of claims 1 to 7, wherein the indicator displays time.   A timepiece comprising the movement according to claim 1.

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