Electronic watch, movement, and method for manufacturing the electronic watch

Abstract

To provide an electronic watch that can easily use batteries having different nominal voltages, a movement, and a method for manufacturing an electronic watch.SOLUTION: An electronic watch comprises: a time display unit that displays time; a battery storage unit in which any one of a first battery and a second battery having different nominal voltage from the first battery is arranged; and a control unit that is supplied with power from the first battery or the second battery, and controls the electronic watch based on a predetermined set value. The control unit includes a terminal corresponding to the type of the battery arranged in the battery storage unit, and selects the set value according to the state of the terminal.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an electronic timepiece, a movement, and a method for manufacturing an electronic timepiece. [Background technology]

[0002] Patent Document 1 discloses an electronic timepiece that includes a base plate having a battery housing portion, a battery placed in the battery housing portion, and a spacer placed between the battery and the base plate. In Patent Document 1, the above-mentioned feature allows batteries of different thicknesses to be housed in the battery housing portion simply by changing the thickness of the spacer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-204545 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, although batteries of different thicknesses can be accommodated in the battery compartment, if batteries with different nominal voltages are used, the circuit board connected to the battery is not adapted to voltage changes, which could cause the electronic watch to malfunction. This creates the problem that batteries with different nominal voltages cannot be easily used. [Means for solving the problem]

[0005] The electronic watch disclosed herein comprises a time display unit that displays the time, a battery storage unit that contains either a first battery or a second battery with a different nominal voltage than the first battery, and a control unit that receives power from either the first battery or the second battery and controls the electronic watch based on a predetermined setting value, and the control unit has terminals that correspond to the type of battery placed in the battery storage unit, and selects the setting value depending on the state of the terminals.

[0006] The movement disclosed herein comprises a battery storage section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed, and a control section that receives power from the first battery or the second battery and controls the electronic watch based on a predetermined set value, and the control section has terminals corresponding to the type of battery placed in the battery storage section, and selects the set value depending on the state of the terminals.

[0007] The method for manufacturing an electronic watch disclosed herein includes a time display unit that displays the time, a battery storage unit in which either a first battery or a second battery having a different nominal voltage from the first battery is placed, a control unit that receives power from the first battery or the second battery and controls it based on a predetermined set value, and has terminals, and a circuit board on which the control unit is mounted and has wiring to which the terminals are connected, and is characterized by including a step of cutting the wiring when the second battery is used. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view showing an electronic timepiece according to a first embodiment. [Figure 2] FIG. 1 is a circuit diagram showing a circuit of an electronic timepiece according to a first embodiment. [Figure 3] FIG. 2 is a diagram showing the configuration of a first motor of the electronic timepiece according to the first embodiment. [Figure 4] FIG. 2 is a diagram showing the configuration of an IC of the electronic timepiece according to the first embodiment. [Figure 5] FIG. 2 is a cross-sectional view showing the main part of the movement of the first embodiment. [Figure 6] FIG. 2 is a cross-sectional view showing the main part of the movement of the first embodiment. [Figure 7] FIG. 2 is a cross-sectional view showing the main part of the movement of the first embodiment. [Figure 8] FIG. 2 is a cross-sectional view showing the main part of the movement of the first embodiment. [Figure 9] FIG. 10 is a front view showing an electronic timepiece according to a second embodiment. [Figure 10] FIG. 10 is a circuit diagram showing the circuitry of an electronic timepiece according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [First embodiment] An electronic timepiece 1 according to a first embodiment of the present disclosure will now be described with reference to the drawings. FIG. 1 is a front view of the electronic timepiece 1. FIG. 1, electronic timepiece 1 includes a dial 2, a second hand 3, a minute hand 4, an hour hand 5, a crown 6, button A 7, and button B 8. Second hand 3, minute hand 4, and hour hand 5 together constitute the time display unit of the present disclosure.

[0010] [Circuit configuration of electronic clock] FIG. 2 is a diagram showing the circuit configuration of the electronic timepiece 1. As shown in FIG. 2, the electronic timepiece 1 includes a movement 10 that drives a second hand 3, a minute hand 4, and an hour hand 5. The movement 10 is configured to include a quartz oscillator 11 as a signal source, a battery 12 as a power source, switches SW1 to SW3, a first motor 13, a second motor 14, an IC 20 for the clock, and wiring 161. Switch SW1 is turned on and off in conjunction with the pulling out of crown 6 shown in Figure 1. Switch SW2 is turned on and off in conjunction with the operation of button A 7. Switch SW3 is turned on and off in conjunction with the operation of button B 8. The first motor 13 is a stepping motor that drives the second hand 3, and the second motor 14 is a stepping motor that drives the minute hand 4 and the hour hand 5. Note that IC is an abbreviation for Integrated Circuit.

[0011] The IC 20 is mounted on a circuit board 16 described later, and includes connection terminals OSC1 and OSC2 to which the crystal oscillator 11 is connected, input / output terminals G1 to G3 to which switches SW1 to SW3 are connected, a setting terminal G4, power supply terminals VDD and VSS to which the battery 12 is connected, output terminals O1 and O2 to which the first motor 13 is connected, and output terminals O3 and O4 to which the second motor 14 is connected. The setting terminal G4 of the IC 20 is connected to the battery 12 by a wiring 161. In addition, in this embodiment, the positive electrode of the battery 12 is connected to the high potential side power supply terminal VDD, the negative electrode is connected to the low potential side power supply terminal VSS, and the low potential side power supply terminal VSS is set to the reference potential.

[0012] The battery 12 is housed in a battery housing section 17, which will be described later. In this embodiment, the battery housing section 17 houses a first battery 12A or a second battery 12B having a different nominal voltage from the first battery 12A. For example, the first battery 12A is a lithium-ion secondary battery with a nominal voltage of 1.5 V, and the second battery 12B is an all-solid-state battery with a nominal voltage of 2.3 V. The first battery 12A and the second battery 12B are charged by a solar cell (not shown) or the like. Here, the nominal voltage is a value established as a guideline for the voltage across the terminals of a battery when used under normal conditions. For a new battery or a battery that is nearly fully charged, the voltage across the terminals will be higher than the nominal voltage, but when the battery is discharged or when a large current is supplied to the load, the voltage across the terminals will be lower than the nominal voltage.

[0013] 3 is a diagram showing the configuration of the first motor 13. Note that the second motor 14 has a similar configuration to the first motor 13, although a description thereof will be omitted. As shown in FIG. 3, the first motor 13 includes a stator 131, a coil 130, and a rotor 133. Both ends of the coil 130 are electrically connected to output terminals O1 and O2 of the IC 20. The rotor 133 is a magnet magnetized with two poles in the radial direction. Therefore, the first motor 13 is a two-pole single-phase stepping motor used in electronic timepieces, and is driven by drive pulses supplied from the output terminals O1 and O2 of the IC 20. The drive pulses supplied from the output terminals O1 and O2 of the IC 20 are an example of a drive signal of the present disclosure.

[0014] For example, when a drive pulse is supplied to coil 130 and a drive current flows from output terminal O1 to output terminal O2, a counterclockwise magnetic field is generated in FIG. 3. This magnetic field polarizes stator 131, causing it to repel rotor 133 and rotate rotor 133 by 180°, which is a unit amount. Once rotor 133 has rotated 180°, a drive pulse is supplied so that a drive current flows from output terminal O2 to output terminal O1. This generates a clockwise magnetic field in FIG. 3. This magnetic field polarizes stator 131 in the opposite direction to the previous one, causing it to repel rotor 133 and rotate rotor 133 another 180°. The rotor 133 continues to rotate by repeating this operation. In this way, switching the direction of the drive current by switching output terminals O1 and O2 that supply the drive current each time rotor 133 rotates by a unit amount is equivalent to switching the polarity of the drive current.

[0015] [IC circuit configuration] FIG. 4 is a diagram showing the configuration of the IC 20. As shown in Figure 4, the IC 20 includes an oscillator circuit 21, a frequency divider circuit 22, a CPU 23 for controlling the electronic timepiece 1, a ROM 24, an input circuit 26, a BUS 27, a first motor control circuit 30A, and a second motor control circuit 30B. The first motor control circuit 30A and the second motor control circuit 30B are examples of drive circuits. CPU is an abbreviation for Central Processing Unit, and ROM is an abbreviation for Read Only Memory.

[0016] The oscillator circuit 21 causes the crystal oscillator 11, which is the reference signal source shown in FIG. 2, to oscillate at a high frequency, and outputs an oscillation signal of a predetermined frequency (32768 Hz) generated by this high-frequency oscillation to the frequency divider circuit 22. The frequency divider circuit 22 divides the frequency of the output of the oscillator circuit 21 and supplies a timing signal to the CPU 23 . The ROM 24 stores various programs executed by the CPU 23. In this embodiment, the ROM 24 stores programs for realizing a basic clock function, a stopwatch function, a time difference adjustment function, etc. Furthermore, in this embodiment, the ROM 24 stores a pulse width P of a drive pulse K, a pulse count C, and a battery voltage threshold, which will be described later. The CPU 23 executes the programs stored in the ROM 24 to realize the above-mentioned functions.

[0017] The input circuit 26 outputs the states of the terminals G1 to G4 to the BUS 27. The BUS 27 is used for data transfer between the CPU 23, the input circuit 26, the first motor control circuit 30A, and the second motor control circuit 30B. The first motor control circuit 30A and the second motor control circuit 30B supply predetermined drive pulses to the coils 130 of the first motor 13 and the second motor 14 in accordance with commands input from the CPU 23 via the BUS 27.

[0018] The first motor control circuit 30A controls the first motor 13 so that the second hand 3 can move in both forward and reverse directions, that is, both clockwise and counterclockwise. Therefore, the first motor control circuit 30A only needs to be capable of driving and controlling the first motor 13 in both forward and reverse directions. The second motor control circuit 30B controls the second motor 14 so that the minute hand 4 and the hour hand 5 can move in both forward and reverse directions.

[0019] [Regarding the status of setting terminal G4] Next, the state of the setting terminal G4 will be described. The setting terminal G4 is a terminal for specifying the specifications of the electronic watch 1. In this embodiment, the setting terminal G4 is a terminal corresponding to the type of battery 12 with a different nominal voltage, i.e., a terminal for specifying the battery 12 to be used; for example, a bonding option terminal of the IC 20 is used as the setting terminal G4. Specifically, when using the first battery 12A, the electronic timepiece 1 is used with the setting terminal G4 and the first battery 12A electrically connected by the wiring 161. In other words, the setting terminal G4 is in a battery voltage state in which the wiring 161 is electrically connected to the first battery 12A. On the other hand, when the second battery 12B is used, the wiring 161 connecting the setting terminal G4 to the second battery 12B is disconnected. In other words, the setting terminal G4 is set to a released state in which the wiring 161 is electrically disconnected from the second battery 12B.

[0020] In this way, in this embodiment, the state of the setting terminal G4 can be changed by electrically connecting or disconnecting the wiring 161 that connects the setting terminal G4 to the battery 12. In this embodiment, the wiring 161 is formed by pattern printing. The wiring 161 is formed so that the spacing between adjacent wirings is wider than that of other wirings formed by pattern printing or the like. Specifically, the wiring 161 is formed so that the spacing between adjacent wirings is three times or more wider than that of other wirings. This makes it easier to physically cut the wiring 161 when using the second battery 12B.

[0021] [Control processing of the first motor control circuit] Next, the control process of the first motor control circuit 30A of this embodiment will be described. The control process of the second motor control circuit 30B is the same as that of the first motor control circuit 30A. In this embodiment, the CPU 23 generates a control signal using a timing signal input from the frequency divider circuit 22, and controls the first motor control circuit 30A using the control signal to alternately output drive pulses K to each terminal of the coil 130, which rotate the rotor 133 by one step. Here, the CPU 23 is configured to supply drive pulses K with different pulse widths P to the coil 130 at different pulse numbers C according to the state of the setting terminal G4.

[0022] Specifically, when the setting terminal G4 is in the battery voltage state, that is, when using the first battery 12A, the CPU 23 is configured to supply drive pulses K with different pulse widths P to the coil 130 at different pulse numbers C according to the power supply voltage (VDD). For example, when VDD ≥ 1.5V, the CPU 23 supplies the drive pulse K with the pulse width P 12 , 21 , 13 , 11 to the coil 130 at the pulse number C 11 and when 1.3V < VDD < 1.5V, the CPU 23 supplies the drive pulse K with the pulse width P 11 to the coil 130 at the pulse number C 12 and when VDD ≤ 1.3V, the CPU 23 supplies the drive pulse K with the pulse width P 12 to the coil 130 at the pulse number C 12 and is configured as such. 13 of the drive pulse K 13 to the coil 130 at the pulse number C 13 to the coil 130 at the pulse number C On the other hand, when the setting terminal G4 is in the released state, that is, when using the second battery 12B, the CPU 23 is configured to supply the drive pulse K with the pulse width P 21 to the coil 130 at the pulse number C 21 and is configured as such. 21 to the coil 130 at the pulse number C Here, in this embodiment, the pulse width P and the pulse number C are set such that P 21 C 21 ≤ P 11 C 11 ≤ P 12 C 12 ≤ P 13 C 13 and are stored in the ROM 24. Thereby, even when using batteries 12 with different nominal voltages or when the power supply voltage of the battery 12 changes, the effective power of the drive pulse K output to the rotor 133 can be made substantially equal. Therefore, even when using batteries 12 with different nominal voltages or when the power supply voltage of the battery 12 changes, the motor control circuits 30A and 30B that drive the pointers 3, 4, and 5 can be appropriately operated. The above pulse width P and pulse number C are merely examples, and even when using the first battery 12A, a constant pulse width P and pulse number C may be used regardless of the power supply voltage (VDD). Furthermore, when the rotor 133 has rotated a predetermined number of times in succession with a certain pulse width P, the pulse width P may be shortened to drive the rotor 133 with a smaller effective power.

[0023] In addition, in this embodiment, when the CPU 23 determines that the rotor 133 has not rotated due to the drive pulse K, in order to reliably rotate the rotor 133 by one step, it generates a control signal using the timing signal input from the divider circuit 22, and controls the first motor control circuit 30A using the control signal to output an auxiliary pulse AP having a wider pulse width P than the drive pulse K to the coil 130.

[0024] Specifically, when the setting terminal G4 is in the battery voltage state, that is, when the first battery 12A is used, the CPU 23 is configured to be able to supply auxiliary pulses AP with different pulse widths P and different pulse numbers C to the coil 130 according to the power supply voltage (VDD). For example, when VDD≧1.5V, the CPU 23 supplies auxiliary pulses AP with different pulse widths P 14 Auxiliary pulse AP 11 The number of pulses C 14 When VDD<1.5V, the pulse width P 15 Auxiliary pulse AP 12 The number of pulses C 14 is supplied to the coil 130. On the other hand, when the setting terminal G4 is in the open state, that is, when the second battery 12B is used, the CPU 23 sets the pulse width P 24 Auxiliary pulse AP 21 The number of pulses C 24 is supplied to the coil 130. In addition, when the setting terminal G4 is in the battery voltage state and VDD≦1.3V, the pulse width P 16 Auxiliary pulse AP 13 The number of pulses C 15 The voltage may be supplied to the coil 130 in the form of a pulse width and number of pulses, which may be set appropriately depending on the type of battery used and the characteristics of the motor.

[0025] As described above, in this embodiment, the CPU 23 is configured to select and change the pulse width P and number of pulses C of the drive pulse K and auxiliary pulse AP for controlling the first motor 13 according to the state of the setting terminal G4. Note that the CPU 23 is an example of a control unit in the present disclosure, the drive pulse K and auxiliary pulse AP are an example of a drive signal in the present disclosure, and the pulse width P and number of pulses C are an example of values ​​of the drive signal as setting values ​​in the present disclosure.

[0026] [Normal time display mode and power save mode] Next, the normal time display mode and the power save mode will be described. In this embodiment, the CPU 23 is configured to be able to switch between a normal time display mode and a power save mode that consumes less power than the normal time display mode, depending on the voltage between the terminals of the battery 12.

[0027] Specifically, the ROM 24 stores a power save setting voltage threshold V that determines whether the normal time display mode is switched to the power save mode. 11 ,V 21 and the power save release voltage threshold V that determines whether to release the power save mode and switch to normal time display mode. 12 ,V 22 And, it is stored. When the setting terminal G4 is in the battery voltage state, that is, when the first battery 12A is being used, the CPU 23 determines whether the voltage between the terminals of the first battery 12A is equal to or lower than the power save setting voltage threshold V 11If the time drops below this value, the watch switches from normal time display mode to power save mode. In this embodiment, when the CPU 23 switches to power save mode, it controls the first motor control circuit 30A to move the second hand 3 to a predetermined position indicating power save mode, for example the 45-second position, and stops it. The CPU 23 also controls the second motor control circuit 30B to stop the minute hand 4 and the hour hand 5. At this time, the CPU 23 continues to keep time on the internal clock. In this way, in power save mode, the CPU 23 stops driving the first motor 13 and the second motor 14 while continuing to keep time on the internal clock, thereby significantly reducing power consumption compared to normal time display mode. Furthermore, the CPU 23 determines whether the voltage across the terminals of the first battery 12A is equal to or exceeds the power save release voltage threshold V 12 When this time is exceeded, the watch switches from power save mode to normal time display mode. Here, the power save release voltage threshold V 12 is the power save setting voltage threshold V 11 is set to a value higher than

[0028] On the other hand, when the setting terminal G4 is in the open state, that is, when the second battery 12B is used, the CPU 23 determines whether the voltage between the terminals of the second battery 12B is equal to or lower than the power save setting voltage threshold V 21 When the temperature drops below this level, the watch switches from normal time display mode to power save mode. Furthermore, the CPU 23 determines whether the voltage across the terminals of the second battery 12B is equal to or exceeds the power save release voltage threshold V 22 When this time is exceeded, the watch switches from power save mode to normal time display mode. Here, the power save release voltage threshold V 22 is the power save setting voltage threshold V 21 is set to a value higher than In this manner, in this embodiment, even when batteries 12 with different nominal voltages are used, the CPU 23 determines the power save set voltage threshold V 11 ,V 21 , and the power save release voltage threshold V 12 ,V 22This allows the watch to switch between the normal time display mode and the power save mode appropriately. 11 ,V 21 , and the power save release voltage threshold V 12 ,V 22 is an example of a battery voltage threshold value as a setting value in the present disclosure.

[0029] [Movement] 5 to 8 are cross-sectional views showing the main parts of the movement 10 of this embodiment. In Fig. 5 to Fig. 8, the back cover side is shown as the top and the dial 2 side is shown as the bottom. As shown in FIGS. 5 to 8, the movement 10 includes a main plate 15, a circuit board 16, a battery housing portion 17, a circuit holder 18, a battery holder 19, a positive lead terminal 29, and a negative lead plate 28.

[0030] The base plate 15 is made of a non-conductive material such as resin. As described above, the circuit board 16 has the IC 20 mounted thereon, and the back cover side is held by the circuit holder 18. The battery accommodating section 17 is formed with a recess that opens to the back cover side of the main plate 15. In this embodiment, the battery accommodating section 17 accommodates either a first battery 12A or a second battery 12B, which have different nominal voltages. The surface of battery housing 17 facing the back cover of battery 12 is held and electrically connected by a leaf spring-shaped negative lead plate 28 that provides electrical continuity between battery 12 and the wiring formed on circuit board 16. Furthermore, the back cover sides of negative lead plate 28 and circuit holder 18 are held by battery holder 19. And because negative lead plate 28 is shaped like a leaf spring that pushes battery 12 toward dial 2, the opposite side from the back cover, battery 12 is held in battery housing 17 even when movement 10 is subjected to an external impact.

[0031] In addition, a positive lead terminal 29, which is the opposite pole to the negative lead plate 28, is disposed between the side surface of the battery 12 and the side surface of the base plate 15. The positive lead terminal 29 has a leaf spring shape that presses against the side surface of the battery 12, electrically connecting the side surface of the battery 12 to the positive lead terminal 29. The other end of the positive lead terminal 29 is electrically connected to wiring formed on the circuit board 16.

[0032] [Electronic watch manufacturing process] Next, the main steps of the manufacturing process for the electronic timepiece 1 of this embodiment will be described. In this embodiment, the circuit board 16 is manufactured with the wiring 161 in an uncut state so that either the first battery 12A or the second battery 12B can be used. Thereafter, when using the first battery 12A, the movement 10 is assembled using the circuit board 16 as is and then installed in the case. When using the second battery 12B, the wiring 161 is cut by drilling a hole in the circuit board 16. Then, in the same manner as when using the first battery 12A, the movement 10 is assembled and installed in the case.

[0033] [Effects of the first embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, when the state of setting terminal G4 is changed, the CPU 23 selects and changes the pulse width P and pulse number C for controlling the electronic watch 1 in accordance with the state of setting terminal G4. This makes it easy to use batteries 12 with different nominal voltages.

[0034] In this embodiment, the state of the setting terminal G4 can be changed by electrically connecting or disconnecting the wiring 161 that connects the setting terminal G4 of the CPU 23 to the first battery 12A or the second battery 12B. This allows the state of the setting terminal G4 to be changed without changing the circuit, making it easy to use batteries 12 with different nominal voltages.

[0035] In this embodiment, even if a battery 12 with a different nominal voltage is used, the CPU 23 outputs drive pulses K to the motor control circuits 30A, 30B according to the nominal voltage of the battery 12 used, so that the motor control circuits 30A, 30B that drive the hands 3, 4, 5 can be operated appropriately.

[0036] In this embodiment, even if a battery 12 with a different nominal voltage is used, the CPU 23 selects a battery voltage threshold as a setting value according to the nominal voltage of the battery 12 being used, so that the normal time display mode and the power save mode can be switched appropriately.

[0037] In this embodiment, an all-solid-state battery with excellent long-term reliability can be easily used as the second battery 12B depending on the user's purpose, such as ensuring higher safety or using the battery in a wide temperature range.

[0038] [Second embodiment] Next, an electronic timepiece 1A according to a second embodiment of the present disclosure will be described with reference to Figures 9 and 10. In the second embodiment, the same or similar components as those in the first embodiment are designated by the same reference numerals, and descriptions thereof will be omitted or simplified. FIG. 9 is a front view of the electronic timepiece 1A. As shown in FIG. 1, the electronic timepiece 1A includes a dial 2, a second hand 3, a minute hand 4, an hour hand 5, a crown 6, a button A 7, and a button B 8, similar to the first embodiment described above. In this embodiment, the electronic timepiece 1A is configured to acquire time information by receiving at least one satellite signal transmitted from multiple positioning information satellites 100 that orbit the Earth in a predetermined orbit. The electronic timepiece 1 is also configured to receive at least three satellite signals transmitted from the positioning information satellites 100 and calculate and acquire position information. The positioning information satellite 100 is a positioning information satellite used in GNSS, such as a GPS satellite, and there are multiple positioning information satellites in the Earth's orbit. For example, there are currently about 30 GPS satellites in the Earth's orbit. GNSS is an abbreviation for Global Navigation Satellite System. Furthermore, the positioning information satellite 100 is not limited to the above, but also includes geostationary satellites such as geostationary satellite navigation augmentation systems, and satellites of regional satellite positioning systems that can only be searched in specific regions, such as quasi-zenith satellites.

[0039] [Circuit configuration of electronic clock] FIG. 10 is a diagram showing the circuit configuration of the electronic timepiece 1A. As shown in FIG. 10, the electronic timepiece 1A includes a movement 10A, just like the first embodiment described above. In this embodiment, the movement 10A includes a satellite signal receiving device 31A and an antenna 32A.

[0040] Antenna 32A is an antenna that receives satellite signals transmitted from positioning information satellite 100, and is configured as a patch antenna in this embodiment. However, antenna 32A is not limited to being configured as a patch antenna, and may be configured as, for example, a dipole antenna, an inverted-F antenna, a ring antenna, or the like.

[0041] When driven by IC 20A, satellite signal reception device 31A receives radio waves of satellite signals transmitted from positioning information satellites 100 via antenna 32A. If satellite signal reception device 31A succeeds in receiving radio waves of satellite signals, it transmits the acquired information, such as orbit information and time information, to IC 20A. On the other hand, if satellite signal reception device 31A fails to receive satellite signals, it transmits information to that effect to IC 20A. Note that satellite signal reception device 31A is an example of a receiving unit in the present disclosure.

[0042] In this embodiment, the CPU 23 of the IC 20A is configured to be switchable between a reception-enabled mode in which the satellite signal reception device 31A operates and a reception-disabled mode in which the satellite signal reception device 31A does not operate, depending on the voltage between the terminals of the battery 12.

[0043] Specifically, the ROM 24 stores a reception disable setting voltage threshold V 31 ,V 41 and the reception disable release voltage threshold V that determines whether to release the reception disable mode and transition to reception enable mode. 32 ,V 42 And, it is stored. When the setting terminal G4 is in the battery voltage state, that is, when the first battery 12A is being used, the CPU 23 determines whether the voltage between the terminals of the first battery 12A is equal to or lower than the reception disable setting voltage threshold V 31 If the signal level drops below this level, the CPU 23 switches from reception-enabled mode to reception-disabled mode. In this embodiment, the CPU 23 is configured to not operate the satellite signal reception device 31A when switching to reception-disabled mode. In this way, in reception-disabled mode, the CPU 23 does not operate the satellite signal reception device 31A, which makes it possible to significantly reduce power consumption. Furthermore, the CPU 23 determines whether the voltage between the terminals of the first battery 12A is equal to or exceeds the reception disable release voltage threshold V 32 If the time limit is exceeded, the system switches from unreceivable mode to receivable mode. Here, the reception disable release voltage threshold V 32 is the unreceivable voltage threshold V 31 is set to a value higher than

[0044] On the other hand, when the setting terminal G4 is in the open state, that is, when the second battery 12B is used, the CPU 23 determines whether the voltage between the terminals of the second battery 12B is equal to or lower than the reception disable setting voltage threshold V 41 If the signal falls below this level, the reception mode will be switched to non-reception mode. Furthermore, the CPU 23 determines whether the voltage between the terminals of the second battery 12B is equal to or exceeds the reception disable cancellation voltage threshold V 42 If the time limit is exceeded, the system switches from unreceivable mode to receivable mode. Here, the reception disable release voltage threshold V 42 is the unreceivable voltage threshold V 41 is set to a value higher than In this way, in this embodiment, even when batteries 12 with different nominal voltages are used, the CPU 23 determines the reception disable set voltage threshold V 31 ,V 41 , and the reception disable release voltage threshold V 32 ,V 42 Therefore, it is possible to appropriately switch between the reception enabled mode and the reception disabled mode. 31 ,V 41 , and the reception disable release voltage threshold V 32 ,V 42 is an example of a battery voltage threshold value as a setting value in the present disclosure.

[0045] [Effects of the second embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, even when a battery 12 with a different nominal voltage is used, the CPU 23 selects the battery voltage threshold as a setting value according to the nominal voltage of the battery 12 being used, so that it is possible to appropriately switch between a reception-enabled mode and a reception-disabled mode.

[0046] [Variations] The present disclosure is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present disclosure.

[0047] In the above-described embodiments, the battery accommodating section 17 accommodates either the first battery 12A or the second battery 12B, which have different nominal voltages, and the setting terminal G4 is configured to indicate the type of battery placed in the battery accommodating section 17. However, this is not limiting. For example, the battery accommodating section may be capable of accommodating the first battery and a third battery, which has a different nominal voltage from the second battery, and the terminal may be configured to indicate the type of battery, among the first battery, the second battery, and the third battery, that is placed in the battery accommodating section. In this case, the control section may be configured to select a setting value depending on, for example, the combination of the states of the two terminals. This configuration makes it possible to easily use three types of batteries with different nominal voltages.

[0048] In the above-described embodiments, the first battery 12A is a lithium-ion secondary battery with a nominal voltage of 1.5 V, and the second battery 12B is an all-solid-state battery with a nominal voltage of 2.3 V. However, this is not limiting. For example, the first battery may be a lithium-ion secondary battery with a nominal voltage of 1.5 V, and the second battery may be a lithium-ion secondary battery with a nominal voltage of 2.3 V. Alternatively, the first battery may be a lithium-ion secondary battery with a nominal voltage of 3.7 V, and the second battery may be an all-solid-state battery with a nominal voltage of 4.0 V. In other words, the first battery and the second battery may be batteries with different nominal voltages.

[0049] In the above-described embodiments, the first battery 12A and the second battery 12B are charged by solar cells or the like, but this is not limiting. For example, the first battery 12A and the second battery 12B may be configured to be charged by various types of power generation devices, such as a power generation device that generates electricity by rotating a rotor with a rotating spindle, a thermal power generation device that generates electricity using thermal energy, a piezoelectric power generation device that uses the piezoelectric effect, a power generation device that uses a charged film, or a power generation device that generates electricity by external induction such as stray radio waves.

[0050] In the above-described embodiments, the CPU 23 is configured to select the value of the drive signal including the pulse width P and the number of pulses C, or the battery voltage threshold as the setting value in accordance with the state of the setting terminal G4, but is not limited to this. For example, the control unit may be configured to select a setting value such as a current value for controlling a driver for driving a motor in accordance with the state of the terminal.

[0051] In the above-described embodiments, the CPU 23 is configured to select setting values ​​such as pulse width P and pulse count C depending on whether the state of the setting terminal G4 is a battery voltage state or a released state, i.e., whether the wiring 161 is electrically connected or disconnected. However, this is not limiting. For example, resistor circuits with different resistance values ​​may be provided in the wiring electrically connecting the terminal to the first battery or the second battery, and the control unit may be configured to select setting values ​​depending on the state of the resistance between the terminal and the first battery or the second battery. Furthermore, for example, a switch element may be provided in the wiring electrically connecting the terminal to the first battery or the second battery, and the control unit may be configured to select setting values ​​depending on the state of the terminal caused by switching the switch element. In the above-described embodiments, the watch is configured with three hands: the second hand 3, the minute hand 4, and the hour hand 5, but this is not limiting. It may also be configured without the second hand 3, or with other hands that do not display time. Even when such other hands are provided, the watch may be configured to select a setting value for controlling the other hands depending on the state of the setting terminal G4.

[0052] Summary of this disclosure The electronic watch disclosed herein comprises a time display unit that displays the time, a battery storage unit that contains either a first battery or a second battery with a different nominal voltage than the first battery, and a control unit that receives power from either the first battery or the second battery and controls the electronic watch based on a predetermined setting value, and the control unit has terminals that correspond to the type of battery placed in the battery storage unit, and selects the setting value depending on the state of the terminals. In this disclosure, when the terminal state is changed, the control unit selects and changes the setting value for controlling the electronic timepiece according to the terminal state, making it easy to use batteries with different nominal voltages.

[0053] In the electronic watch disclosed herein, the control unit may be mounted on a circuit board having wiring to which the terminal is connected, and the state of the terminal may include a battery voltage state in which the wiring is electrically connected to the first battery or the second battery, and an open state in which the wiring is electrically disconnected from the first battery or the second battery. This allows the terminal state to be changed by electrically connecting or disconnecting the wiring connecting the terminal of the control unit to the first battery or the second battery, which means that the terminal state can be changed without changing the circuit, making it easy to use batteries with different nominal voltages.

[0054] In the electronic watch disclosed herein, the time display unit may have hands and a drive circuit for driving the hands, the set value may be the value of a drive signal output to the drive circuit, and the control unit may select the value of the drive signal depending on the state of the terminal. This means that even if batteries with different nominal voltages are used, the control unit outputs a drive signal to the drive circuit according to the nominal voltage of the battery being used, allowing the drive circuit that drives the hands to operate appropriately.

[0055] In the electronic watch disclosed herein, the control unit can switch between a normal time display mode and a power save mode that consumes less power than the normal time display mode by comparing the battery voltage threshold value as the set value with the power supply voltage, and may select the battery voltage threshold value depending on the state of the terminals. This means that even if batteries with different nominal voltages are used, the control unit selects the battery voltage threshold as a setting value according to the nominal voltage of the battery being used, allowing appropriate switching between normal time display mode and power save mode.

[0056] In the electronic watch disclosed herein, a receiving unit capable of receiving radio waves from outside is provided, and the control unit is capable of switching between a reception-enabled mode in which the receiving unit operates and a reception-disabled mode in which the receiving unit does not operate by comparing the battery voltage threshold value as the set value with the power supply voltage, and may select the battery voltage threshold value depending on the state of the terminal. This means that even if batteries with different nominal voltages are used, the control unit selects the battery voltage threshold as a setting value according to the nominal voltage of the battery being used, allowing appropriate switching between reception-enabled mode and reception-disabled mode.

[0057] In the electronic timepiece of the present disclosure, either the first battery or the second battery may be an all-solid-state battery. This allows users to easily use all-solid-state batteries with excellent long-term reliability according to their purposes, such as ensuring higher safety or using the batteries in a wide temperature range.

[0058] In the electronic watch of the present disclosure, the battery storage section may be capable of accommodating the first battery and a third battery having a different nominal voltage from the second battery, and the terminal may indicate the type of battery among the first battery, the second battery, and the third battery to be placed in the battery storage section. This allows for easy use of three types of batteries with different nominal voltages.

[0059] The movement disclosed herein comprises a battery storage section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed, and a control section that receives power from either the first battery or the second battery and controls the electronic watch based on a predetermined set value, and the control section has terminals corresponding to the type of battery placed in the battery storage section, and selects the set value depending on the state of the terminals. In this disclosure, when the terminal state is changed, the control unit changes the setting value for controlling the electronic timepiece in accordance with the terminal state, making it easy to use batteries with different nominal voltages.

[0060] The method for manufacturing an electronic watch disclosed herein includes a time display unit that displays the time, a battery storage unit in which either a first battery or a second battery having a different nominal voltage from the first battery is placed, a control unit that receives power from the first battery or the second battery and controls it based on a predetermined set value, and has terminals, and a circuit board on which the control unit is mounted and has wiring to which the terminals are connected, and is characterized by including a step of cutting the wiring when the second battery is used. In this disclosure, when using a second battery, the terminal state can be changed by cutting the wiring that electrically connects the terminal of the control unit to the circuit board. This allows the terminal state to be changed without changing the circuit, making it easy to use batteries with different nominal voltages. [Explanation of symbols]

[0061] 1,1A...electronic watch, 2...dial, 3...second hand, 4...minute hand, 5...hour hand, 6...crown, 7...button A, 8...button B, 10,10A...movement, 11...quartz crystal oscillator, 12...battery, 12A...first battery, 12B...second battery, 13...first motor, 14...second motor, 15...base plate, 16...circuit board, 17...battery compartment, 18...circuit holder, 19...battery holder, 20...IC, 21...oscillator circuit, 22...divider circuit, 2 3...CPU (control unit), 24...ROM, 26...input circuit, 28...negative lead plate, 29...positive lead terminal, 30A...first motor control circuit, 30B...second motor control circuit, 31A...satellite signal receiving device, 32A...antenna body, 100...positioning information satellite, 130...coil, 131...stator, 133...rotor, 161...wiring, G1...input / output terminal, G2...input / output terminal, G3...input / output terminal, G4...setting terminal.

Claims

1. a time display unit that displays the time; a battery accommodating section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed; a control unit that receives power from the first battery or the second battery and controls the electronic timepiece based on a predetermined setting value; a circuit board on which the control unit is mounted, the control unit includes terminals corresponding to the type of battery to be placed in the battery housing unit, and selects the setting value according to the state of the terminals; the circuit board includes wiring to which the terminals are connected; The terminal state includes a battery voltage state in which the wiring is electrically connected to the first battery or the second battery, and a release state in which the wiring is electrically disconnected from the first battery or the second battery. An electronic watch characterized by:

2. A time display unit that displays the time; a battery accommodating section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed; a control unit that receives power from the first battery or the second battery and controls the electronic timepiece based on a predetermined setting value; the control unit includes terminals corresponding to the type of battery to be placed in the battery housing unit, and selects the setting value according to the state of the terminals; The control unit is capable of switching between a normal time display mode and a power save mode that consumes less power than the normal time display mode by comparing the battery voltage threshold value as the set value with the power supply voltage, and selects the battery voltage threshold value depending on the state of the terminal. An electronic watch characterized by:

3. A time display unit that displays the time; a battery accommodating section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed; a control unit that receives power from the first battery or the second battery and controls the electronic timepiece based on a predetermined setting value; a receiving unit capable of receiving radio waves from an external source, the control unit includes terminals corresponding to the type of battery to be placed in the battery housing unit, and selects the setting value according to the state of the terminals; The control unit is capable of switching between a reception enabled mode in which the receiving unit is operated and a reception disabled mode in which the receiving unit is not operated by comparing a battery voltage threshold value as the setting value with a power supply voltage, and selects the battery voltage threshold value according to the state of the terminal. An electronic watch characterized by:

4. 4. The electronic timepiece according to claim 1, The time display unit includes a pointer, a drive circuit for driving the pointer; the set value is a value of a drive signal to be output to the drive circuit, The control unit selects the value of the drive signal depending on the state of the terminal. An electronic watch characterized by:

5. 5. The electronic timepiece according to claim 1, Either the first battery or the second battery is an all-solid-state battery. An electronic watch characterized by:

6. 6. The electronic timepiece according to claim 1, the battery accommodating section is capable of accommodating the first battery and a third battery having a different nominal voltage from the second battery; The terminal indicates the type of battery to be placed in the battery accommodating portion among the first battery, the second battery, and the third battery. An electronic watch characterized by:

7. A time display unit that displays the time; a battery accommodating section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed; a control unit that receives power from the first battery or the second battery and controls the electronic timepiece based on a predetermined setting value; a circuit board on which the control unit is mounted, the control unit includes terminals corresponding to the type of battery to be placed in the battery housing unit, and selects the setting value according to the state of the terminals; The second battery is disposed in the battery housing portion, the circuit board includes wiring to which the terminals are connected; The wiring is cut An electronic watch characterized by:

8. a battery accommodating section in which either a first battery or a second battery having a different nominal voltage from the first battery is placed; a control unit that receives power from the first battery or the second battery and controls the electronic timepiece based on a predetermined setting value; a circuit board on which the control unit is mounted, the control unit includes terminals corresponding to the type of battery to be placed in the battery housing unit, and selects the setting value according to the state of the terminals; the circuit board includes wiring to which the terminals are connected; The terminal state includes a battery voltage state in which the wiring is electrically connected to the first battery or the second battery, and a release state in which the wiring is electrically disconnected from the first battery or the second battery. A movement characterized by:

9. A method for manufacturing an electronic timepiece comprising: a time display unit that displays the time; a battery housing unit that accommodates either a first battery or a second battery that has a different nominal voltage from the first battery; a control unit that receives power from the first battery or the second battery, controls the power based on a predetermined set value, and has terminals; and a circuit board on which the control unit is mounted and has wiring to which the terminals are connected, When the second battery is used, the wiring is cut off. A method for manufacturing an electronic watch.

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