JP2009025320A - Wrist watch with radio function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wrist watch with a radio function having a sense of luxury in appearance. <P>SOLUTION: An antenna 17 for receiving a long-wave standard radio wave is stored in a case constituted of a casing 12, a casing 13 and a back lid 14. The casing 12 is constituted of a conductor material, such as, a stainless steel, brass or titanium, and notched parts C1, C2 are formed on parts, corresponding to coil both ends of the stored antenna 17. The long-wave standard radio wave is received by the antenna 17 through the notched parts C1, C2. The casing 12 is constituted of a non-conductor. The back lid 14 is formed, by fitting a discoid part 142 constituted of a non-conductor material, such as, a glassy material to the outer frame 141 constituted of a conductor material, such as, stainless steel, brass or titanium. The discoid part 142 is finished so as to have an appearance similar to that of a metal material by surface treatment. According to the case having this constitution, the wrist watch with radio functions can receive the long-wave standard radio wave and is provided with a sense of luxury in appearance. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wristwatch with a wireless function.

  In recent years, a radio-controlled timepiece having a function of receiving a long-wave standard radio wave and correcting the time based on the received signal has been sold. The long wave standard radio wave is a radio wave obtained by modulating a carrier wave with a signal indicating the current time, and is transmitted at a frequency of about 40 kHz in Japan, for example.

  By the way, in a radio-controlled timepiece, an antenna for receiving a long-wave standard radio wave is generally not provided outside the watch case but is built in the watch case. Therefore, if the watch case is made of a conductive material such as metal, the long wave standard radio wave is shielded by the watch case, and the built-in antenna cannot receive the long wave standard radio wave. For this reason, a non-conductive material such as a plastic material is generally used as the material of the watch case of the radio-controlled timepiece, instead of a conductive material.

  However, since non-conductive materials such as plastic are not high-quality in texture (color tone, etc.) compared to conductive materials such as stainless steel, brass and titanium, radio-controlled watches are used in watch cases made of non-conductive materials. I can not feel the luxury. In addition, although there is ceramic, for example, as a material that is non-conductive material but has a high-quality texture, ceramics are expensive, so if ceramic is used for a watch case, the price of the radio-controlled watch itself is low. It will be high.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a wristwatch with a wireless function that is inexpensive and has a high-quality appearance.

In order to solve the above problems, the present invention provides a wristwatch with a wireless function that receives radio waves and performs control based on information contained in the received radio waves, a loop antenna that receives the radio waves, and a non-conductive material A first watch case for storing the loop antenna, having a side surface, storing the loop antenna so that a loop opening surface of the loop antenna faces the side surface, and being attached with a watch band A first watch case having a band attaching portion, and a second watch made of a metal material attached to the first watch case so as to cover the outside of the first watch case including the band attaching portion. A second watch case having a notch formed in at least one of the portions facing the loop opening surface of the loop antenna housed in the first watch case. To provide a wristwatch with a radio function that includes Graphics and, the.
According to this wireless function wristwatch, the watch case is constituted by the second watch case made of metal, and the user can have a high-class feeling from the metal texture.
In addition, since the metal second watch case has a cutout portion at least at one of the locations facing the loop opening surface of the loop antenna, the metal second watch case. Even if the loop antenna is arranged inside the case, the radio wave reaches the loop opening surface of the loop antenna, and thus the loop antenna can receive the radio wave.
The wristwatch with a wireless function according to the present invention may be applied to a so-called radio timepiece that receives a long wave standard radio wave and corrects a display time.
Furthermore, for example, an operator such as a button is arranged in the notch, thereby making it difficult for the user to recognize the notch and not making the notch feel uncomfortable in design. Furthermore, since the operation element is made of a non-conductive material, the operation element does not block the radio wave, and the radio wave reaches the inside of the first watch case from the notch.

  Here, the second watch case preferably has a configuration in which the notches are formed at two locations facing the loop opening surface of the loop antenna. According to this configuration, when the loop antenna is a coil-shaped object, radio waves reach the respective loop opening surfaces at both ends of the coil, and the reception sensitivity can be increased.

  In the wristwatch with a wireless function according to the present invention, the timepiece module for displaying the time and the loop antenna are substantially horizontal on the inner surface so as not to overlap the inner surface of the back cover. Such a configuration is preferable. With this configuration, the timepiece module and the loop antenna are arranged in the same plane, so that the thickness of the first and second timepiece cases can be reduced.

  The loop antenna preferably has a core made of a magnetic material, and the opening area of the notch formed in the second watch case is preferably larger than about 50% of the cross-sectional area of the core. By adopting such a configuration, the magnetic field component of the radio wave concentrates on the core (core), and the opening area of the notch is made larger than about 50% of the cross-sectional area of the core, thereby making the loop opening of the loop antenna. On the surface, sufficient radio field strength is obtained, and reception characteristics by the loop antenna are improved.

  Here, when the dial of the radio-controlled watch is made of a conductive material, the magnetic field component of the radio wave that has passed through the notch and reached the inside of the first watch case is attracted to the dial, and the loop antenna Since the magnetic field intensity of the radio wave reaching the loop opening surface of the signal decreases, the signal reception level may decrease. Therefore, in the wristwatch with a wireless function of the present invention, the reception level of the loop antenna is reduced without attenuating the radio wave that has reached the inside of the first watch case by forming the dial from a non-conductive material. Can be improved.

  Further, it is preferable that at least a surface corresponding to the notch portion of the second watch case has a texture almost similar to that of the metal material among the surfaces of the first watch case. According to this configuration, in appearance, the sense of unity between the first watch case and the second watch case made of a metal material is improved, and the luxury feeling of the wireless function watch can be further enhanced. The second watch case is preferably made of any one material of stainless steel, brass or titanium.

  In addition, a back cover attached to the first watch case or the second watch case is further provided, and the back cover is made of a ring-shaped outer peripheral portion made of a conductive material and a non-conductive material, and the outer periphery The structure provided with the disk part fitted by the part is preferable. According to this configuration, since the disc portion of the back cover is made of a non-conductive material, radio waves that have entered the first watch case from the cutout portion formed in the second watch case are attracted to the disc portion of the back cover. This prevents the reception characteristics of the loop antenna from deteriorating.

  Furthermore, it is preferable that the disk portion has a texture almost the same as that of a metal material. According to this configuration, the texture of the second watch case forming the front and side surfaces of the wristwatch with a wireless function and the disc portion of the back cover forming the back surface are unified with the metal material, and a high-class feeling can be enhanced. It is.

  In addition, it is desirable that the operation unit is provided at a location where the notch is formed, and further includes an operation unit made of a non-conductive material. According to this configuration, for example, an operator such as a button is arranged in the notch, so that it is difficult for the user to recognize the notch and the notch is not made to feel uncomfortable in design. Become. Further, since the operation element is made of a non-conductive material, the operation element is not shielded by the radio wave, and the radio wave reaches the inside of the first watch case from the cutout portion.

  Furthermore, generally, when the member on which the band for attaching the watch to the arm is attached is a metal material, the luxury of the exterior of the watch is enhanced. Therefore, it is preferable that the second watch case includes a band mounting portion on which a watch band is mounted. By adopting such a configuration, the watch band is attached to the second watch case made of a metal material, and a high-class feeling in the exterior of the watch is enhanced. In this configuration, it is more preferable to further include a back cover attached to the second watch case, and the back cover is made of a conductive material. According to this configuration, since the second watch case and the back cover can be made of the conductive material, it is possible to improve the sense of quality and the second watch case is formed with a notch portion. Deterioration of the reception characteristics of the loop antenna housed in one watch case is prevented.

  In the wristwatch with a wireless function of the present invention, a watch case is constituted by a non-conductive material only at a minimum part for allowing a long-wave standard wave to pass through the built-in antenna, and other parts are made of stainless steel, brass and titanium. It comprised with the conductor material. As a result, the wristwatch with a wireless function of the present invention can receive a long-wave standard radio wave to perform a time adjustment operation and have a high-quality appearance.

<1. First Embodiment>
<1-1. Configuration of First Embodiment>
FIG. 1 is an exploded perspective view showing the configuration of a radio-controlled timepiece 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view and a plan view showing the configuration of the radio-controlled timepiece 1. Note that FIG. 2 shows only the parts necessary for understanding the present invention, and the other parts are not shown. FIG. 3 is a perspective view showing a hand movement mechanism which is one component of the timepiece module, and FIG. 4 is a conceptual diagram for explaining reception of a long wave standard wave by an antenna.

  As shown in FIG. 1, the radio-controlled timepiece 1 according to this embodiment includes an antenna 17 for receiving a long-wave standard radio wave (Japan JJY: 40 kHz / 60 kHz, US WWVB: 60 kHz, German DCF77: 77.5 kHz). First, reception of a long wave standard radio wave by the antenna 17 will be described with reference to FIG. As shown in the figure, in the antenna 17 which is a loop antenna, the long wave standard radio wave (specifically, the magnetic field component of the long wave standard radio wave) penetrating each of the loop opening surfaces 17a and 17b varies with time. Electromagnetic induction generates an induced electromotive force (induced electromotive voltage) in the coiled antenna 17. And the fluctuation | variation of the electric potential of the both ends of a coil by an induced electromotive force is detected as a received signal. That is, the antenna 17 has directivity that reacts to the magnetic field in the direction of the extension line connecting the loop opening surface 17a and the loop opening surface 17b.

  By the way, as shown in FIG. 1, the antenna 17 described above is accommodated in a casing 13 provided in the radio-controlled timepiece 1, and the casing 13 is covered with a casing 12 from the outside. Here, since the casing 12 is formed of a metal that is a conductor material, if the casing 12 completely covers the surface of the casing 13, the long-wave standard radio wave is shielded by the casing 12, and the casing 13 has an inside. Will not reach the antenna 17. Moreover, if the material of the casing 12 is a non-conductive material such as plastic, the sense of quality is lost. Therefore, in the present embodiment, as shown in FIGS. 1 and 2, notches C1 and C2 are formed at locations facing the loop opening surfaces 17a and 17b of the antenna 17 in the casing 12, and the long wave standard radio wave It is the structure which reaches | attains the loop opening surfaces 17a and 17b of the antenna 17 from the notches C1 and C2. Thus, by using the casing 12 in which the notches C1 and C2 are formed at locations facing the loop opening surfaces 17a and 17b of the antenna 17, the casing 12 faces the loop opening surfaces 17a and 17b. Even when the casing 13 is covered with a metal material, which is a conductor material, except for the portion to be used, the long-wave standard radio wave is received by the antenna 17. In addition, as shown in FIG. 4, when a ferrite core 171 made of ferrite, which is a ferromagnetic material, is used for the antenna 17, long-wave standard radio waves are concentrated on the ferrite core 171 and radio waves in the notches C1 and C2 are concentrated. Since the strength is increased, it is possible to further improve the reception sensitivity of the long wave standard radio wave. For the antenna 17, the core is not limited to the above-described ferrite, and any material can be used as long as it is a magnetic material. For example, an amorphous material formed by laminating dozens of metal foils is used. You can also. In addition, as the opening area of the notches C1 and C2 is larger, the radio wave intensity at the loop opening surfaces 17a and 17b of the antenna 17 is increased and the reception sensitivity of the long wave standard radio wave is improved, but in general, the notches C1 and C2 It is sufficient that the opening area is about half the cross-sectional area of the ferrite core 171 of the antenna 17. The casing 12 is formed with two notches C1 and C2. If long-wave standard radio waves with sufficient strength reach the loop opening surfaces 17a and 17b of the antenna 17, either Or just one place.

  Next, the configuration of the radio-controlled timepiece 1 according to this embodiment will be described in detail. As shown in FIG. 1, the radio-controlled timepiece 1 includes the above-described casing 12 and casing 13, and a back cover 14. The casing 12 is made of a metal material that is a conductor material such as stainless steel, brass, and titanium, for example, and a circular opening is formed at the center thereof. As shown in FIG. 2 (a), a cover glass 11, which is a disc-shaped transparent glass disk, is fitted in this opening, and this cover glass 11, casings 12 and 13, and back cover 14 A housing of the radio-controlled timepiece 1 is configured. Note that the cross-sectional view of FIG. 2A does not show a cross section cut across the antenna 17 and the button 28.

  The surface of the casing 12 is sufficiently subjected to a surface finishing process such as a mirror finishing process. By emphasizing a metal texture (for example, a color tone), a high-quality appearance on the radio-controlled timepiece 1 is obtained. Has come to increase. In addition, a band mounting portion 121 is formed on the casing 12, and the watch band 18 is mounted on the band mounting portion 121 by a spring bar 181. The watch band 18 and the spring bar 181 are made of a metal material which is a conductive material such as stainless steel, brass and titanium, and a portion where the band for attaching the watch to the user's arm is abbreviated as metal. By having a similar texture, a sense of quality is enhanced.

  Next, in FIG. 1, the casing 13 is an annular member made of a non-conductive material such as a plastic material, and the casing 12 is attached to the casing 13 so as to cover the outside thereof. As described above, the two notches C1 and C2 are formed on the side surface of the casing 12 at a position facing the loop opening surface of the antenna 17. In this configuration, when the casing 13 is covered with the casing 12, the side surface of the casing 13 made of a non-conductive material is exposed from the notches C <b> 1 and C <b> 2, and the sense of unity of the texture in the appearance of the radio-controlled timepiece 1 is impaired. Will end up. Therefore, in the present embodiment, at least the surface corresponding to each of the notches C1 and C2 among the surface of the casing 13 is subjected to surface processing such as metallic paint mixed with metal powder, whereby the casing 13 And a sense of unity with the casing 12 made of a metal material. In this way, the sense of quality is enhanced by unifying the appearance of the radio-controlled timepiece 1 with metal.

  As shown in FIGS. 1 and 2B, buttons 28 as operating elements are provided at two locations on the watch at 2 o'clock and 10 o'clock. Thus, by arranging the button 28 at a position away from the loop opening surfaces 17 a and 17 b of the antenna 17, the button 28, the switch portion (not shown) that engages with the button 28, and the like are electrically conductive materials. Even if it is formed from, the influence on the reception sensitivity of the antenna 17 can be suppressed. As shown in FIG. 2C, the buttons 28 are arranged at 4 o'clock and 8 o'clock directions of the timepiece near the loop opening surfaces 17a and 17b of the antenna 17 for convenience of design and the like. In this case, the material of the button 28 may be a non-conductive material, and thereby the influence on the reception sensitivity of the antenna 17 can be suppressed. In the present embodiment, the number of buttons 28 is two, but the number of buttons is determined by the content of the function of the radio-controlled timepiece 1 and may be any number.

  Next, as shown in FIG. 1, a dial plate 15, a timepiece module 16, and an antenna 17 are housed in the above-described casing including the casings 12 and 13 and the back cover 14. The dial plate 15 is a flat plate-like member, and is fixed substantially horizontally to the back cover 14 below the cover glass 11 as shown in FIG. A watch module 16 and an antenna 17 are disposed below. In this embodiment, a non-conductive material such as a paper material or a plastic material is used as the material of the dial plate 15, which will be described later.

  The timepiece module 16 is for displaying time, and includes a hand movement mechanism and an IC chip (not shown). Among these, the hand movement mechanism is a mechanism for driving each of the second hand 71, the minute hand 72, and the hour hand 73, and its configuration is shown in FIG. As shown in this figure, the hand movement mechanism has a train wheel configured such that the second wheel 74, the second wheel 75, and the hour wheel 76 are interlocked with each other. One end of a second hand 71 is attached to the rotating shaft of the second wheel 74, and one end of a minute hand 72 is attached to the rotating shaft of the second wheel 75. Furthermore, one end of the hour hand 73 is attached to the rotation shaft of the hour wheel 76. The second wheel 74 is rotationally driven by a second motor 25 described later, and this rotation is transmitted to the second wheel 75 and the hour wheel 76, whereby each of the second hand 71, the minute hand 72, and the hour hand 73 is driven. Point the direction. Thus, the user can see the current time by looking through the cover glass 11 in the direction indicated by the second hand 71, the minute hand 72, and the hour hand 73.

  On the surface of the second wheel 74, a magnetic material magnetized with a specific magnetic information pattern is attached along a circular orbit centering on the rotation axis of the second wheel 74. Further, in order to obtain the position (rotation angle) of the second hand 71, a second hand detection element 741 for reading the magnetic information pattern is fixed so that the magnetic body on the surface of the second wheel 74 faces the detection surface. Similarly, a magnetic body is affixed to the second wheel 75 and the hour wheel 76, and a minute hand detecting element 751 is fixed so as to face the magnetic body affixed to the second wheel 75, and is attached to the hour wheel 76. An hour hand detecting element 761 is fixed so as to face the magnetic body. Each of the second hand detection element 741, the minute hand detection element 751 and the hour hand detection element 761 outputs a detection signal corresponding to the read magnetic information pattern to the IC chip of the timepiece module 16.

  The IC chip includes a circuit for obtaining the current pointer positions of the second hand 71, the minute hand 72, and the hour hand 73 based on detection signals from the second hand detecting element 741, the minute hand detecting element 751, and the hour hand detecting element 761, respectively. Yes. The IC chip also includes a circuit that performs various processes such as driving control of the hand movement mechanism and time correction based on the long wave standard radio wave. The electrical configuration of the radio-controlled timepiece 1 will be described in detail later.

  In FIG. 1, the antenna 17 described above receives a long wave standard radio wave and supplies a received signal to the timepiece module 16. As shown in FIG. 2, the antenna 17 is arranged in the casing 13 so that its long axis is substantially horizontal to the back cover 14, and each of the loop opening surfaces 17 a and 17 b of the antenna 17 is a side surface of the casing 13. It comes to oppose.

  Next, the back cover 14 is a member attached to the bottom of the casing 13. More specifically, the back cover 14 is formed by fitting a disk portion 142 made of a non-conductive material such as a glass material to a ring-shaped outer frame 141 made of a metal material such as stainless steel, brass or titanium. It is configured. The disk portion 142 is subjected to surface processing such as plating, and has a texture similar to that of a metal material. The back cover 14 configured in this manner is fitted into the casing 12 or fixed by screwing. Thus, in this embodiment, each part corresponding to notch parts C1-C3 among the parts which touch a user's eyes, ie, casing 12, disk part 142 of back cover 14, and casing 13, is provided. Since the portion is made of metal or has a texture almost similar to that of metal, the appearance of the radio-controlled timepiece 1 is unified with metal, so that a high-class feeling can be improved. It has become.

  In the present embodiment, a non-conductive material is used as the material of the dial 15 as described above. The reason is as follows. If the dial 15 is made of a conductive material, the long wave standard radio wave that has reached the inside of the case of the radio-controlled timepiece 1 from the notches C1 and C2 is attracted to the dial 15 made of the conductive material, and the loop of the antenna 17 The intensity of radio waves reaching the opening surfaces 17a and 17b is attenuated, and the reception characteristics of the antenna 17 are deteriorated. Therefore, in the present embodiment, the dial 15 is formed from a non-conductive material such as paper or plastic, and the loop opening surface of the antenna 17 is not attenuated by the long-wave standard radio wave that has reached the inside of the casing of the radio-controlled timepiece 1. 17a and 17b are reached. Similarly, by using a non-conductive material for the disk portion 142 of the back cover 14, a long-wave standard radio wave that reaches the inside of the housing from the front and back surfaces of the radio-controlled timepiece 1 (upper and lower surfaces in FIG. 2A). Thus, the reception characteristics of the antenna 17 can be improved. Furthermore, in order to prevent the reception characteristics of the antenna 17 from deteriorating, it is desirable that the antenna 17 be arranged away from the hand movement mechanism containing a large amount of metal material. However, in a wristwatch, the size of the housing is limited. Therefore, in this embodiment, as shown in FIG. 1, the timepiece module 16 including this hand movement mechanism and the antenna 17 are arranged so as to be substantially horizontal so as not to overlap the surface of the back cover 14. Thus, the thickness of the casing is reduced, and the antenna 17 is disposed so as to be close to the inner surface of the casing 13 (that is, at the corner of the casing 13), and the antenna 17 is separated as much as possible from the timepiece module 16. This prevents the reception characteristics of the antenna 17 from deteriorating. Since the watch band 18 is sufficiently separated from the antenna 17, even if a metal material is used as the material, the reception of the long wave standard radio wave by the antenna 17 is not hindered. Therefore, in the present embodiment, a metallic material is used as the material of the watch band 18 to enhance the sense of quality by the texture of the metallic material.

  Next, the electrical configuration of the radio-controlled timepiece 1 will be described. FIG. 5 is a block diagram showing an electrical configuration of the timepiece module 16 and its peripheral devices. In FIG. 5, an oscillation unit 21, a reception processing unit 22, a control unit 23, and a drive unit 24 among the components of the timepiece module 16 are circuits formed in the above-described IC chip.

  The oscillation unit 21 includes an oscillation circuit (not shown) and a synthesis circuit (not shown). A crystal resonator 211 is connected to the oscillation circuit as a reference oscillation source. The oscillation circuit generates a reference pulse having a predetermined frequency and outputs it to the synthesis circuit. The synthesis circuit divides the reference pulse to generate a divided pulse, and synthesizes the divided pulse and the reference pulse to generate pulse signals having different pulse widths and edge generation timings. 23.

  The reception processing unit 22 performs various processes on the analog reception signal 91 from the antenna 17 to obtain standard time information included in the long wave standard radio wave. FIG. 6 is a block diagram showing an electrical configuration of the reception processing unit 22. As shown in FIG. 6, the reception processing unit 22 includes an amplification circuit 51, a bandpass filter 52, a demodulation circuit 53, an AGC (Automatic Gain Control) circuit 54, and a decoding circuit 55.

  The amplifier circuit 51 is electrically connected to the antenna 17, amplifies the analog reception signal 91 from the antenna 17, and supplies the amplified signal to the band pass filter 52. The band pass filter 52 supplies only a predetermined frequency component of the analog reception signal 91 to the demodulation circuit 53. The demodulation circuit 53 smoothes and demodulates the input analog reception signal 91. The AGC circuit 54 compares the level of the output signal of the demodulation circuit 53 with a predetermined level, and adjusts the signal amplification factor in the amplification circuit 51 so that the reception level of the long wave standard radio wave becomes constant. The decode circuit 55 A / D converts the demodulated analog reception signal 91 into a digital signal, and obtains a time code 92 indicating current time information from the digital signal.

  Here, the time code 92 will be described with reference to FIGS. The long wave standard radio wave includes a time code 92 in the format shown in FIG. The time code 92 includes 60 segments, and one signal is transmitted for each segment. It takes 1 second to transmit one signal, and one set of time information is composed of 60 signals (1 minute). The signal to be transmitted is one of the three types “1”, “0”, and “P”.

  As shown in FIGS. 8 to 10, the type of each signal is specified by the duty ratio. FIG. 8 shows a signal waveform in which a large amplitude continues for 0.5 seconds (duty ratio 50) and represents “1”. FIG. 9 shows a waveform in which a large amplitude continues for 0.8 seconds (duty ratio 80) and represents “0”. FIG. 10 shows a waveform in which a large amplitude continues for 0.2 seconds (duty ratio 20) and represents “P”.

  As shown in FIG. 7, the format of the time code 92 includes minute information 921 indicating the current minute, hour information 922 indicating the current time, and date information 923 indicating the current date. The current day is the day from January 1 of the year.

  Further, the parameters “P” and “0” in the format of the time code 92 shown in FIG. 7 are predetermined parameters used for synchronization between the radio signal and the format of the time code 92. If two “P” s are consecutive, it means that the second is “00”.

  The “N” display in the format of the time code 92 shown in FIG. 7 means that when the signal “1” is transmitted, the “N” display is turned on and used for adding the minutes. When a signal other than “1” is transmitted, the “N” display is turned off and is not used for addition. The “N” display shown in FIG. 7 has a weight for addition. For example, if the minute information 921 is a data string of “1”, “0”, “1”, “0”, “0”, “1”, “1”, “1”, the current minute is 40 * 1 + 20 * 0 + 10 * 1 + 0 * 0 + 8 * 0 + 4 * 1 + 2 * 1 + 1 * 1 = 57 [minutes].

  The time code 92 in the above format is output from the reception processing unit 22 to the control unit 23. In FIG. 5, the control unit 23 is a device that centrally controls the timepiece module 16. The control unit 23 includes a reception control circuit unit 41, a drive control circuit unit 42, a second counter circuit unit 43, and an hour / minute counter circuit unit 44. Further, the second counter circuit 43 includes a second position counter 431, a second time counter 432, and a second coincidence detection circuit 433. The hour / minute counter circuit 44 includes an hour / minute position counter 441, an hour / minute time counter 442, and an hour / minute coincidence. A detection circuit 443 is provided.

  The drive control circuit unit 42 is a circuit that generates a drive pulse signal that is a signal for moving the second hand, the minute hand, and the hour hand based on various pulse signals output from the oscillation unit 21. Normally, the drive control circuit unit 42 outputs a pulse signal for advancing the second hand at a cycle of 1 second, and outputs a pulse signal for advancing the minute hand at a cycle of 1 minute. On the other hand, when the display time is corrected, the drive control circuit unit 42 outputs a pulse signal for fast-forwarding each pointer display position at a cycle shorter than usual.

  The drive unit 24 includes a second drive circuit 31 and an hour / minute drive circuit 32. The second drive circuit 31 is a circuit that operates the second motor 25 that is a motor for driving the second hand based on various drive pulses supplied from the drive control circuit unit 42 in the control unit 23. The hour / minute drive circuit 32 is a circuit for operating the hour / minute motor 26 which is a motor for driving the minute hand based on various drive pulses supplied from the drive control circuit unit 42. In the above description using FIG. 2, only the second motor 25 is illustrated, but here, a description is given with a configuration having two motors, the second motor 25 and the hour / minute motor 26. The two-motor configuration has an advantage that the time required for moving the hand position for time correction can be shortened. The second motor 25 and the hour / minute motor 26 are so-called stepping motors.

  The battery 27 is a device that supplies power for operating the timepiece module 16. The battery 27 can be a primary battery or a secondary battery. The button 28 is, for example, a crown, which is not a component of the timepiece module 16, but is illustrated together with the timepiece module 16 in order to facilitate understanding of the present embodiment. The user of the radio-controlled timepiece 1 can operate the drive control circuit unit 41 via the button 28 and can manually correct the display of the date and time.

  The operation of the radio-controlled timepiece 1 to correct the display time based on the time code 92 is performed by the reception control circuit unit 41, the second counter circuit unit 43, and the hour / minute counter circuit unit 44 under the control of the drive control circuit unit 42. Is done using. This display time correction operation will be described in detail in the following operation description to avoid duplication of description.

<1-2. Operation of First Embodiment>
In the radio-controlled timepiece 1 of the present embodiment, a metal material that is a conductor material such as stainless steel, brass, and titanium is used as the material of the casing 12 in order to enhance a sense of quality. On the other hand, because the casing 12 has notches C1 and C2 formed at portions corresponding to the loop opening surfaces 17a and 17b of the antenna 17 inside the watch, the antenna 17 receives the long wave standard radio wave. can do.

  FIG. 11 is a flowchart showing the display time correction operation of the radio-controlled timepiece 1. First, when a predetermined time set in advance by the user arrives or when the user manually starts the time adjustment operation with the button 28, a signal output from a control device (not shown) is used as a trigger to generate a long wave standard radio wave. A reception operation starts (step s100).

  When the analog reception signal 91 is supplied via the antenna 17, the reception processing unit 22 calculates the duty ratio every second. Then, the reception processing unit 22 repeats the calculation for 60 seconds and acquires the time code 92 (Yes in step s101).

  Next, the reception processing unit 22 outputs the acquired time code 92 to the control unit 23. In the control unit 23, under the control of the drive control circuit unit 42, the reception control circuit unit 41, the second counter circuit unit 43, and the hour / minute counter circuit unit 44 perform the display time correction operation based on the time code 92. enter.

  When the reception control circuit unit 41 is supplied with the time code 92 from the reception processing unit 22, the reception control circuit unit 41 generates two data, that is, data corresponding to the second and data corresponding to the hour and minute from the time code 92. The indicated data is set as the initial value of the second time counter 432 in the second counter circuit unit 43, and the data indicating the hour and minute is set as an initial value of the hour / minute time counter 442 of the hour / minute counter circuit unit 44 (step s102).

  The second time counter 432 counts pulses generated from the oscillating unit 21 at a cycle of 1 second. As a result of this count, the value set as the initial value in step s102 increases in a cycle of 1 second, and the count result is output to the second coincidence detection circuit 433 as current second data 93 indicating the current second. The Similarly, the hour / minute time counter 442 counts pulses generated from the oscillating unit 21 at a cycle of one minute. As a result of this counting, the value set as the initial value in step s102 increases at a cycle of 1 minute, and the count result is current hour / minute data 94 indicating the current hour / minute, and the hour / minute coincidence detection circuit 443. Is output.

  Thereafter, the drive control circuit unit 42 obtains the time indicated by the second hand, the minute hand, and the hour hand by reading a magnetic information pattern (not shown) of the hand movement mechanism, and obtains data representing the second in the second counter circuit unit 43. As the initial value of the second position counter 431, data representing the hour and minute are respectively set as the initial value of the hour / minute position counter 441 in the hour / minute counter circuit unit 44 (step s103).

  The second position counter 431 to which the initial value is set in step s103 increases the value at a cycle of one second, and outputs the value to the second coincidence detection circuit 433 as display second data 95 indicating the second. Similarly, the hour / minute position counter 441 increases the value at a cycle of one minute and outputs the value to the hour / minute coincidence detection circuit 443 as display hour / minute data 96 indicating the hour / minute.

  Then, the drive control circuit unit 42 starts a current time return operation for adjusting the display time to the current time. First, the drive control circuit unit 42 sends an operation of sending a fast-forwarding pulse for second driving to the second driving circuit 31 and the second position counter 431 of the driving unit 24 and a time-minute driving circuit of the driving unit 24 for sending a fast-forwarding pulse for hour / minute driving. 32 and the operation to send to the hour / minute position counter 441 are started (step s104). Thereby, the second position counter 431 starts counting the fast-forwarding pulse for second driving, and the hour / minute position counter 441 starts counting the fast-forwarding pulse for driving hour / minute (step s105).

  As a result, the second hand, the minute hand, and the hour hand are rapidly advanced, and the display second data 95 gradually approaches the value of the current second data 93, and the display hour / minute data 96 approaches the current hour / minute data 94. The coincidence between the value of the display second data 95 and the value of the current second data 93 is detected by the second coincidence detection circuit 433, and the coincidence between the value of the display hour / minute data 96 and the value of the current hour / minute data 94 coincides with the hour / minute. When detected by the detection circuit 443 (Yes in step s106), the drive control circuit unit 42 stops outputting fast-forwarding pulses for second driving and hour / minute driving and outputs normal driving pulses (step s107). ). Then, the time adjustment operation based on the time code 92 is completed.

  When the time code 92 cannot be acquired because the reception state of the long wave standard radio wave is poor (No in step s100), the reception control circuit unit 41 stops the time correction process and the normal hand movement state Return to.

<1-3. Effects of First Embodiment>
As described above, the radio-controlled timepiece 1 of the present embodiment can bring out a high-class feeling as a timepiece by the casing 13 formed of a metal material that is a conductive material such as stainless steel, brass, and titanium. In addition, the radio-controlled timepiece 1 can receive the long-wave standard radio wave by the antenna 17 inside the timepiece by the notches C1 and C2 formed in the casing 12, and acquires the time code 92 to correct the display time. Can do.

<2. Second Embodiment>
<2-1. Configuration of Second Embodiment>
FIG. 12 is an exploded perspective view showing details of each part constituting the radio-controlled timepiece 2 of the second embodiment. In FIG. 12, to avoid complication, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof is omitted. As shown in FIG. 12, the radio-controlled timepiece 2 includes casings 62 and 63, a dial plate 15, a timepiece module 16, and an antenna 17.

  In the assembly process of the radio-controlled timepiece 2 according to the present embodiment, the dial plate 15, the timepiece module 16, and the antenna 17 are arranged inside the casing 62, and each is fixed inside the casing 62. The casing 62 is a ring shape having a rectangular cross section, and a disk portion 621 made of a non-conductive material such as plastic is integrally formed on the bottom surface of an outer peripheral portion 622 made of a non-conductive material such as plastic. is there. The casing 62 may be subjected to a surface treatment process such as a plating process, and may have the same appearance as a metal material. By doing so, it is possible to improve the luxury of the radio-controlled timepiece.

  And if the casing 63 is arrange | positioned on the casing 62 and it fixes with the screw | thread 64, the inside of a housing | casing will be sealed. The casing 63 is made of a conductive material, and can enhance the high-quality feeling of the radio-controlled timepiece 2. On the other hand, the casing 63 covers only the upper surface of the casing 62. However, since the notches C1 and C2 are provided, the casing 63 does not completely cover the side surface of the casing 62, and the long wave standard radio wave is received by the antenna 17 inside the casing. It is also possible to do. In addition, the screw 64 which used the design for improving the high-class feeling of the radio wave correction timepiece 2 is used. Note that the operation of this embodiment is the same as that of the above-described first embodiment, and a description thereof will be omitted.

<2-2. Effect of Second Embodiment>
In the radio-controlled timepiece 2 of the second embodiment, since the casing 62 in which the watch case and the back cover have a one-piece structure is used, the structure is more robust and the waterproofness can be improved. Further, the use of the casing 62 eliminates the need for the back cover, so that the number of parts of the radio-controlled timepiece 2 can be reduced and the cost can be reduced. In addition, the radio-controlled timepiece 2 can receive a long-wave standard radio wave by the antenna 17 while enhancing the high-quality appearance by the casing 63. Furthermore, since the casing 63 is fixed with a screw 64 with a sophisticated design, the luxury of the radio-controlled timepiece 2 is further enhanced.

<3. Third Embodiment>
FIG. 13 is an exploded perspective view showing the configuration of the radio-controlled timepiece 3 according to the third embodiment of the present invention. In FIG. 13, the same reference numerals are given to the same components as those in the first embodiment in order to avoid complication. In the present embodiment, the main difference from the above-described embodiments is that the material of the back cover 14 ′ of the radio-controlled timepiece 3 is a metal material such as stainless steel, brass, or titanium, and the back cover 14 ′ is a casing. 12 is fixed to the screw 12. By adopting such a configuration, the texture of the external appearance of the radio-controlled timepiece 3 can be unified with a metal material, and the sense of quality can be further enhanced. Note that the material of the screws for fixing the back cover 14 ′ is preferably the same material as the back cover 14 ′ or a material having substantially the same texture in order to achieve a uniform feeling of texture. Further, if the back cover 14 'is made of a metal material, as described in the first embodiment, the reception characteristics of the antenna 17 may be deteriorated. Therefore, the opening area of the notches C1 and C2 is increased to increase the antenna capacity. It is desirable to increase the radio wave intensity of the long standard wave at the 17 loop opening surfaces 17a and 17b. Moreover, as shown in FIG. 13, when the button 28 is provided in addition to the portions corresponding to the notches C1 and C2, a configuration in which a notch C3 having the same shape as the notches C1 and C2 is provided. desirable. By adopting such a configuration, the balance in appearance (design) is maintained. Note that the position where the notch C3 is provided is determined by the position where the button 28 is disposed, and is not limited to the position shown in the figure, and may be provided, for example, in the 10 o'clock direction of the timepiece.

<4. Fourth Embodiment>
FIG. 14 is an exploded perspective view showing the configuration of the radio-controlled timepiece 4 according to the fourth embodiment of the present invention. In FIG. 14, the same reference numerals are assigned to the same components as those in the first embodiment in order to avoid complexity. In the present embodiment, a point that is greatly different from the above-described embodiments is not the casing 12 but a band mounting portion 131 in which the watch band 18 is mounted on the casing 13 made of a non-conductive material such as plastic. Is a point. In addition, a cover part 122 having a shape that engages with the band mounting part 131 of the casing 13 is formed on the casing 12 that covers the outside of the casing 13. Further, the back cover 14 and the casing 12 are fixed to the casing 13 with screws. With such a configuration, even if the watch band 18 is mounted on the band mounting portion 131 made of a non-conductive material such as plastic, the band mounting portion 131 is covered with the cover portion 122 made of a metal material. There is no loss of luxury. In order to maintain the strength of the housing, it is desirable that the back cover 14 be fixed to one of the casings 12 and 13 having a portion to which the watch band 18 is attached.

<5. Modification>
The wireless function wristwatch of the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea of the present invention.

(1) In the first embodiment described above, the back cover 14 is a disc-shaped portion 142 made of a non-conductive material such as a glass material on a ring-shaped outer frame 141 made of stainless steel, brass, titanium or the like. However, the back cover 14 may be made of, for example, a non-conductive material such as a plastic material, and the surface may be coated with a metallic tone mixed with metal powder. By doing so, it is also possible to configure the back cover 14 at a lower cost.

(2) In the first and second embodiments described above, data for setting the hand position counter 431 and the hour / minute position counter 441 during the time adjustment operation is recorded on the magnetic body attached to each hand. Although it was obtained by reading a magnetic information pattern, data may be obtained by an optical information pattern or an electrical information pattern. Further, the mechanism for detecting the pointer position itself is omitted, and when the radio-controlled timepieces 1 and 2 are activated, the user manually operates the button 28 and sets values in the second position counter 431 and the hour / minute position counter 441. In this way, the counter may always hold the value.

2 is an exploded perspective view showing the configuration of the radio-controlled timepiece 1. FIG. 2 is a cross-sectional view and a plan view showing the configuration of the radio-controlled timepiece 1. FIG. 3 is a perspective view showing a hand movement mechanism that is one component of the timepiece module 16; FIG. It is a conceptual diagram explaining reception of the long wave standard radio wave by the antenna. It is a block diagram which shows the electrical structure of the timepiece module 16 and its peripheral device. 3 is a block diagram showing an electrical configuration of a reception processing unit 22. FIG. It is explanatory drawing which shows the format of the time code 92. FIG. 6 is an explanatory diagram showing a waveform in which a signal becomes “1” in a time code 92; FIG. 6 is an explanatory diagram showing a waveform in which a signal becomes “0” in a time code 92. FIG. It is an explanatory view showing a waveform in which a signal becomes “P” in the time code 92. 3 is a flowchart showing a display time correction operation of the radio-controlled timepiece 1. It is a disassembled perspective view which shows the structure of the electromagnetic wave correction timepiece 2 which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view which shows the structure of the radio wave correction timepiece 3 which concerns on 3rd Embodiment of this invention. It is a disassembled perspective view which shows the structure of the electromagnetic wave correction timepiece 4 which concerns on 4th Embodiment of this invention.

Explanation of symbols

1, 2, 3, 4 ... Radio correction watch, 12, 13,63 ... casing, 14,14 '... back cover, 141 ... outer frame, 142 ... disk part, 15 ... dial, 16 ... clock module, 17 ... Antenna, 18 ... watch band, 28 ... button, 181 ... spring bar, C1, C2, C3 ... notch, 122 ... cover part, 131 ... band mounting part.

Claims (1)

In a wristwatch with a wireless function that receives radio waves and performs control based on information contained in the received radio waves,
A loop antenna that receives the radio wave, and a first watch case that is made of a non-conductive material and houses the loop antenna, and has a side surface so that a loop opening surface of the loop antenna faces the side surface. A first watch case that houses the loop antenna and has a band mounting portion to which a watch band is mounted;
A second watch case made of a metal material attached to the first watch case so as to cover the outside of the first watch case including the band attaching portion, and is housed in the first watch case. A wristwatch with a wireless function, comprising: a second watch case in which a notch is formed in at least one of the portions facing the loop opening surface of the loop antenna.

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