JP2017122659A - Electronic watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic watch with which it is possible to improve the designability of a sub-dial and prevent a reduction in reception performance.SOLUTION: An electronic watch 1 comprises an exterior case 30, an antenna member, a main dial 11 indicating information by hands 21-23, and an indicator display part 70 that is a sub-dial for indicating information by a hand 71. The antenna member is provided with a power feeding element 113 and a power feeding part having electrical continuity to the power feeding element 113. The main dial 11 is provided with a prohibited area 500 in which arrangement of the sub-dial is prohibited. The prohibited area 500 is an area enclosed by a line segment L1 linking a power feeding point 114A and a hand spindle 25, a line segment L2 linking a half position 113A where the current distribution in the power feeding element 113 is 1/2 of the maximum value and the hand spindle 25, and a line along the power feeding element 113 that links the power feeding point 114A and the half position 113A.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electronic timepiece incorporating an antenna.

As an electronic timepiece that receives a radio wave from a position information satellite such as a GPS (Global Positioning System) satellite and corrects the display time, a wristwatch type electronic timepiece in which an annular antenna body is housed in an outer case has been developed (for example, Patent Document 1).
Such a wristwatch requires an antenna that can ensure a good function in a limited space. For this reason, in Patent Document 1, by providing the antenna body at a position that does not overlap the secondary battery in a plan view, the reception performance of the antenna body is improved as compared with the case where the antenna body is provided at a position overlapping the secondary battery. It was.

JP 2014-62843 A

By the way, in an electronic timepiece, in order to improve design, it is desired to use a metal dial plate when a sub dial is arranged on a dial.
However, in the electronic timepiece incorporating the antenna body, when the number of metal parts arranged near the antenna body increases, there is a problem that the reception performance of the antenna body is affected and the reception performance is lowered.
Accordingly, there is a demand for an electronic timepiece that uses a metal dial plate for the sub-dial to improve the design and that the metal dial plate does not degrade the reception performance of the antenna body.

  An object of the present invention is to provide an electronic timepiece capable of improving the design of a sub-dial and preventing a decrease in reception performance.

  An electronic timepiece according to the present invention is provided on an outer case, an antenna body housed in the outer case, a main dial for instructing information by a pointer for a main dial, and a surface for the sub dial. An electronic timepiece including a sub-dial for instructing information according to a pointer of the antenna, wherein the antenna body includes a power feeding element and a power feeding unit electrically connected to the power feeding element, and the main dial includes the sub dial. A prohibition area where placement is prohibited is set, and the prohibition area includes a feeding point where the feeding element and the feeding section are electrically connected to each other in a plan view when the main dial is viewed from the watch surface side, and the main dial. The line connecting the pointer axis, the half position where the current distribution in the feed element is ½ of the maximum value, and the pointer axis for the main dial are connected. And the line segment, and the feeding point, wherein said a line along the feed element connecting the half-position, in a region enclosed.

  According to the electronic timepiece of the invention, in the main dial, a prohibited area in which the arrangement of the sub dial is prohibited is set, and the prohibited area includes a shaft of a main dial pointer, a feeding point of the antenna body, and the feeding power. It is set in a region surrounded by the half position of the current distribution in the element. For this reason, a sub dial is not arrange | positioned in the area | region where the electric current distribution from a feeding point to a half position is high. For this reason, when a conductive decorative member such as a metal plate is used as the scale plate of the sub dial, it is possible to prevent the reception performance from being deteriorated due to the conductive decorative member affecting reception. Furthermore, since a conductive decorative member such as a metal plate can be used for the sub dial, the design of the sub dial can be improved. Therefore, it is possible to provide an electronic timepiece having both reception performance and sub dial design.

  In the electronic timepiece according to the aspect of the invention, the power feeding element has a length of 1/4 wavelength of the radio wave received by the antenna body, and the half-position is 2/2 of the length of the power feeding element from the power feeding point. The position 3 is preferable.

  If the feed element is set to a length of 1/4 wavelength of the received radio wave, the antenna body can be downsized while maintaining the reception performance. Also, since the feed element is 1/4 wavelength long of the received radio wave, the current distribution during satellite signal reception is a sine wave, the feed point is the highest, and at the other end of the feed element far from the feed point. The lowest. For this reason, the half position where the current distribution is ½ of the highest maximum value can be set to a 1/6 wavelength portion from the feeding point, that is, a position of 2/3 of the length of the feeding element. Therefore, the watch designer can easily grasp the prohibited area, and can easily design the position of the sub dial on the main dial.

  In the electronic timepiece of the invention, the antenna body includes an annular dielectric base material disposed along an outer periphery of the main dial, and the feeding element formed on the surface of the dielectric base material, An axis of a pointer for a main dial is disposed at a plane center position of the main dial, and the forbidden area includes a line segment connecting the feeding point and the plane center position of the main dial, the half position, It is preferable that the fan-shaped region is surrounded by a line segment connecting the plane center position of the main dial, the feeding point, and an arc connecting the half position.

According to the present invention, since the antenna body includes the dielectric base material, the wavelength of the received radio wave can be shortened. Therefore, a small electronic timepiece such as a wristwatch can receive radio waves from a position information satellite such as a GPS satellite.
An antenna body is disposed along the outer periphery of the main dial, and the prohibited area is connected to a line segment connecting the plane center position and the half position of the main dial with the plane center position of the main dial and the feeding point. Since it is set in a fan-shaped area surrounded by a line segment and an arc connecting the feeding point and the half-position, the watch designer can easily grasp the prohibited area. For this reason, the arrangement position of the sub dial in the main dial can be designed easily.

  In the electronic timepiece of the invention, the sub-dial includes an arc-shaped conductive decorative member that is a scale portion indicated by the sub-dial pointer, and the conductive decorative member is an indicator of the sub-dial pointer. It is preferable that they are arranged so as not to overlap a line segment connecting the shaft and the feeding point.

  According to the present invention, the arc-shaped conductive decorative member is arranged so as not to overlap the line segment connecting the axis of the sub dial pointer and the feeding point. The conductive decorative member can be arranged apart. For this reason, the influence of the conductive decorative member in radio wave reception can be reduced.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the power feeding element is disposed in a range from the 2 o'clock scale position to the 10 o'clock scale position in the clockwise direction on the main dial.

  According to the present invention, the power feeding element is arranged in the range from the 2 o'clock scale position through the 6 o'clock scale position to the 10 o'clock scale position (the central angle is in the range of 240 degrees) on the main dial. , 12 o'clock scale position side is not arranged. For this reason, even if it arrange | positions the logo comprised with the metal decoration parts between the axis | shaft of the pointer for main dials, and the scale at 12:00, the logo and electric power feeding element can be arrange | positioned separately. Therefore, it is possible to improve the design of a logo used for displaying a watch brand name and the like, and to prevent the reception performance from being deteriorated due to the logo.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the sub dial displays at least one information of a small clock, an indicator, a day of the week, a chronograph, a small second, and an AM / PM.

  According to the present invention, the sub-dial is provided with a display for displaying at least one of a small clock, an indicator, a day of the week, a chronograph, a small second, and an AM / PM. can do.

It is the schematic which shows the electronic timepiece which concerns on 1st Embodiment of this invention. It is a front view of the electronic timepiece in the first embodiment. It is sectional drawing of the electronic timepiece in 1st Embodiment. It is explanatory drawing which shows the antenna body of 1st Embodiment. It is a graph which shows the electric current distribution in the electric power feeding element of the antenna body of 1st Embodiment. It is a front view of the electronic timepiece in 2nd Embodiment. It is a front view of the electronic timepiece in the modification of the present invention. It is a graph which shows the electric current distribution in the electric power feeding element of the antenna body of the modification of this invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a schematic view showing an electronic timepiece 1 according to the first embodiment.
An electronic timepiece 1 as an electronic device receives a satellite signal from at least one GPS satellite 100 among a plurality of GPS satellites 100 orbiting the earth in a predetermined orbit, acquires time information, and at least It is configured to receive satellite signals from the three GPS satellites 100 and calculate and acquire position information. The GPS satellite 100 is an example of a position information satellite, and a plurality of GPS satellites 100 exist over the earth. Currently, about 30 GPS satellites 100 orbit.

[Schematic configuration of electronic watch]
The electronic timepiece 1 is a timepiece provided with indicators capable of displaying various information.
FIG. 2 is a front view of the electronic timepiece 1, and FIG. 3 is a cross-sectional view showing an outline of the electronic timepiece 1.
As shown in FIGS. 2 and 3, the electronic timepiece 1 includes an exterior case 30, a cover glass 33, and a back cover 34. The exterior case 30 is configured by fitting a bezel 32 made of ceramic to a cylindrical case 31 made of metal. On the inner peripheral side of the bezel 32, a disk-shaped dial plate 10 is disposed via a ring-shaped dial ring 40 made of plastic.
On the side surface of the exterior case 30, an A button 51 is provided at a position at 2 o'clock in the plane center of the dial 10, a B button 52 is provided at a position at 4 o'clock, and a crown 55 at a position at 3 o'clock. Is provided.

As shown in FIG. 3, the electronic timepiece 1 has an opening on the front surface side that is covered with a cover glass 33 via a bezel 32, and has an opening on the back surface side. Is closed by a back cover 34 made of metal.
Inside the outer case 30, a dial ring 40 attached to the inner periphery of the bezel 32, a light-transmissive dial plate 10, hands 21, 22, 23, 71, each hand and the calendar wheel 16 are driven. A driving mechanism 140 is provided.

  The dial ring 40 has an outer peripheral end that is in contact with the inner peripheral surface of the bezel 32, a flat plate portion that is parallel to the cover glass 33, and an inner peripheral end that is in contact with the dial 10. An inclined portion inclined toward the plate 10 side is provided. The dial ring 40 has a ring shape in plan view and a mortar shape in sectional view. A storage space that continues along the inner periphery of the bezel 32 is formed by the flat plate portion, the inclined portion, and the inner peripheral surface of the bezel 32 of the dial ring 40, and a ring-shaped antenna body is formed in the storage space. 110 is stored.

The dial plate 10 is made of a light-transmitting material such as plastic, and includes dials between the dial 10 and the cover glass 33.
A solar panel 135 that performs photovoltaic power generation is provided between the dial plate 10 and the ground plate 125 to which the drive mechanism 140 is attached. The solar panel 135 is a circular flat plate in which a plurality of solar cells (photovoltaic elements) that convert light energy into electric energy (electric power) are connected in series. The dial 10, the solar panel 135, and the base plate 125 are formed with holes through which the shafts (pointer shafts) 25 of the pointers 21, 22, and 23 and the shafts (pointer shafts) 75 of the pointers 71 pass. A calendar small window 15 that is an opening for displaying the date of the car 16 is formed.

The drive mechanism 140 is attached to the ground plane 125 and is covered with the circuit board 120 from the back side. The drive mechanism 140 includes a step motor and a gear train such as a gear, and the step motor drives the hands by rotating the needle shafts 25 and 75 via the wheel train.
Specifically, the drive mechanism 140 includes first to fourth drive mechanisms. The first drive mechanism drives the hands 22 and 23, the second drive mechanism drives the hands 21, the third drive mechanism drives the hands 71, and the fourth drive mechanism drives the calendar wheel 16.

The circuit board 120 includes a receiving device (GPS module) 400, a control device 300, and a storage device 200. Further, the circuit board 120 and the antenna body 110 are connected by using antenna connection pins 115. The antenna connection pin 115 functions as a power supply terminal to supply power to the antenna body 110.
A circuit retainer 122 for covering these circuit components is provided on the back cover 34 side (back side) of the circuit board 120 provided with the receiving device 400, the control device 300, and the storage device 200. A secondary battery 130 such as a lithium ion battery is provided between the ground plate 125 and the back cover 34. The secondary battery 130 is charged with the power generated by the solar panel 135.

[Electronic watch display mechanism]
The pointer 21 (second hand), the pointer 22 (minute hand), and the pointer 23 (hour hand) are attached to a pointer shaft 25 disposed at the center of the dial 10. The pointer shaft 25 is composed of three pointer shafts (rotating shafts) to which the pointers 21, 22, and 23 are attached.
On the inclined surface of the dial ring 40 that surrounds the outer peripheral portion of the dial 10, a scale that divides the inner periphery into 60 parts is written as shown in FIG. 2. Using this scale, the hand 21 displays “second”, the hand 22 displays “minute”, and the hand 23 displays “hour”.
Accordingly, the dial 10 and the inclined surface of the dial ring 40 constitute the main dial 11 that displays the current time. The hands 21 to 23 are pointers for the main dial that indicates the scale of the main dial 11 and displays the current time.

  The dial ring 40 has an alphabet “Y” at the 12-minute position and an alphabet “N” at the 18-minute position. The letters indicate reception (acquisition) results (Y: reception (acquisition) success, N: reception (acquisition) failure) of various information based on the satellite signal received from the GPS satellite 100. The pointer 21 indicates either “Y” or “N” and displays the reception result of the satellite signal.

On the surface of the dial plate 10, that is, the main dial 11, an indicator display unit 70 is provided as a sub dial. A sub dial pointer 71 (mode hand) is attached to a pointer shaft 75 provided at a position in the 8 o'clock direction from the plane center of the dial plate 10. The indicator display unit 70 is arranged in a range from about 7 o'clock to about 9 o'clock in the main dial 11.
The indicator display unit 70 includes a scale plate 72 that is disposed on the outer peripheral side of the rotation region of the pointer 71 and is used for displaying various information. The scale plate 72 is a metallic decorative part composed of a metal strip member. The pointer 71 is set so as to be driven within a certain angle range and not to rotate once. For this reason, the scale plate 72 is formed in an arc shape according to the driving range of the pointer 71.
Hereinafter, the notation of the scale plate 72 will be described. The “n hour direction” (n is an arbitrary natural number) is the direction when the scale plate 72 is viewed from the pointer shaft 75 of the pointer 71.
On the scale plate 72, an alphabetic letter “DST” and a symbol “· (middle point)” are written in a range from the 6 o'clock direction to the 7 o'clock direction when viewed from the pointer shaft 75. DST (daylight saving time) means daylight saving time. The pointer 71 indicates the setting of daylight saving time (DST: daylight saving time ON, ..: daylight saving time OFF) by indicating these letters and symbols.

  In the scale plate 72, in the range from the 8 o'clock direction to the 9 o'clock direction, a crescent sickle symbol is written along the circumference, with the base end in the 9 o'clock direction being thick and the tip in the 8 o'clock direction being thin. . This symbol is a power indicator of the secondary battery 130 (see FIG. 3), and the remaining battery level is displayed when the pointer 71 indicates a position corresponding to the remaining battery level. Note that the pointer 71 indicates a power indicator during normal operation.

  In the range of the scale plate 72 in the 10 o'clock direction, an airplane-shaped symbol is written. This symbol represents the airplane mode. When aircraft take off and landing, the reception of satellite signals is prohibited by the Aviation Law. The pointer 71 indicates that the airplane mode is set and no reception is performed by designating an airplane symbol.

  In the range from the 11 o'clock direction to the 12 o'clock direction of the scale plate 72, a number “1” and a symbol “4+” are written. These numbers and symbols represent satellite signal reception modes. “1” receives GPS time information and the internal time is corrected (time measurement mode), “4+” receives GPS time information and orbit information, calculates position information that is the current position, This means that the time and time zone data described later are corrected (positioning mode).

  The calendar small window 15 is provided in the opening part which opened the dial 10 in the rectangular shape, and the number printed on the calendar wheel 16 can be visually recognized from the opening part. The calendar wheel 16 displays the date “date” corresponding to the time displayed on the main dial 11 by visually recognizing the number from the opening.

[Antenna body]
Next, the antenna body 110 will be described with reference to FIG.
4A is a perspective view of the antenna body 110, and FIG. 4B is a plan view of the antenna body 110. FIG. 4C is a cross-sectional view taken along the line CC in FIG.
The antenna body 110 includes a ring-shaped dielectric substrate 111, and a parasitic element 112 and a feeding element 113 are formed on the surface thereof.

The dielectric substrate 111 has a function of shortening the wavelength of radio waves. That is, the satellite signal transmitted from the GPS satellite 100 is a circularly polarized wave having a frequency of 1575.42 MHzm and a wavelength of about 19 cm. In order to receive such satellite signal radio waves with a loop antenna, the perimeter of the parasitic element 112 is required by 1.0 to 1.4 wavelengths of the satellite signal radio waves. On the other hand, by providing the parasitic element 112 on the dielectric base material 111, the dielectric base material 111 shortens the wavelength of the radio wave of the satellite signal, and the parasitic element 112 receives the shortened wavelength. It becomes possible. Here, in the dielectric substrate 111 having the relative dielectric constant εr, the wavelength shortening rate of the radio wave is 1 / (εr) ^1/2 . For this reason, if the value of the relative dielectric constant εr is increased, the wavelength is further shortened. On the other hand, when a dielectric having a high relative dielectric constant εr is used, the frequency bandwidth becomes narrow and the characteristics become steep, making it difficult to adjust the frequency, or when worn on the arm, the characteristics may deteriorate due to frequency deviation. Therefore, when radio waves of a satellite signal having a wavelength of 19 cm are received by the parasitic element 112 of a loop antenna type having a diameter of about 3 cm (perimeter length of about 9.4 cm), for example, the relative dielectric constant εr of the dielectric substrate 111 is It may be set to 20 or less, preferably 4 to 10. For this reason, the material of the dielectric substrate 111 is, for example, a so-called micalex (εr = 6.5-9) which is a ceramic mainly composed of alumina (εr = 8.5) or a ceramic mainly composed of mica. .5), glass (εr = 5.4 to 9.9), diamond (εr = 5.68), and the like.
By using such a dielectric substrate 111, an antenna body 110 that can be incorporated into a general wristwatch can be obtained.

  As shown in FIG. 4C, the dielectric substrate 111 has a pentagonal cross section, and has an upper surface T1, an outer peripheral surface T2, a bottom surface T3, an inclined surface TP1, and an inclined surface TP2. A parasitic element 112 is formed on the top surface T1 of the dielectric substrate 111, and a feeding element 113 is formed on the inclined surface TP1. A power feeding portion 114 is formed on the inclined surface TP1, the inclined surface TP2, and the bottom surface T3 of the dielectric substrate 111. The power feeding element 113 is electrically connected to an antenna connection pin 115 which is a power feeding terminal via a power feeding unit 114. As a result, a predetermined potential is supplied to the feeding element 113 of the antenna body 110 via the antenna connection pin 115. On the other hand, no potential is supplied to the parasitic element 112 from the outside of the antenna body 110.

The parasitic element 112 is formed by printing a conductive metal element such as copper or silver on the upper surface T1 of the dielectric substrate 111 or attaching a conductive metal plate such as silver or copper. The body substrate 111 is integrally formed linearly. The parasitic element 112 may be formed by patterning the surface of the dielectric substrate 111 by electroless plating.
As shown in FIG. 4B, the parasitic element 112 has a split portion 112A in which the planar shape is formed in a substantially annular shape and the parasitic element 112 is not continuous in a part of the circumferential direction. It is formed in a letter shape.

The feed element 113 is set so that the length in the circumferential direction is ¼ of the wavelength λ shortened by the dielectric substrate 111. In the present embodiment, since the length of the feeding element 113 is appropriately adjusted to match the impedance, the length in the circumferential direction may be shorter or longer than λ / 4. For this reason, in the present invention, the fact that the feed element 113 has a length of ¼ of the wavelength λ shortened by the dielectric base material 111 is not limited to the one corresponding to λ / 4, and λ / 4 A certain range such as a length of 90 to 110% is also included. The length of the feeding element 113 may be set so as to ensure the reception performance by adjusting the impedance.
In addition, since the circumferential length of the dielectric base 111 and the parasitic element 112 is about one wavelength, the length of the feed element 113 is approximately ¼ of the circumference of the dielectric base 111. It is.
The feed element 113 is formed in a substantially arc shape so as to maintain a certain distance from the parasitic element 112, and is disposed along the parasitic element 112. The interval between the parasitic element 112 and the feeding element 113 may be set to about 0.01 times the wavelength λ after the wavelength reduction in the dielectric substrate 111.
These two parasitic elements 112 and 113 function as antenna elements that are electromagnetically coupled to each other and convert electromagnetic waves into current. In addition, by appropriately setting the length of the power feeding element 113, it is possible to match the impedance with the circuit electrically connected to the antenna body 110.

  The power feeding unit 114 is electrically connected to one end side of the power feeding element 113. In the present embodiment, the power feeding element 113 is disposed along the periphery of the dial 10, and the power feeding unit 114 is disposed at the 6 o'clock position. In the present embodiment, since the antenna body 110 receives a GPS satellite signal that is a right-handed circularly polarized wave, the power feeding element 113 is, as shown in FIG. Specifically, it extends counterclockwise from 6 o'clock to 3 o'clock.

  Further, the split portion 112 </ b> A of the parasitic element 112 is disposed within the range in which the power feeding element 113 is disposed at the circumferential position of the dielectric base material 111. For example, the crossing angle (center angle) of each line segment connecting the power feeding unit 114 and the split unit 112A and the center of the dial 10 (positioning position of the pointer shaft 25) is set within a range of about 40 to 50 °.

  The antenna connection pin 115 is in contact with the portion formed on the bottom surface T3 of the dielectric base 111 of the power feeding portion 114 and is conductive. A portion where the power feeding unit 114 and the power feeding element 113 are conducted becomes a power feeding point 114A. This feeding point 114 </ b> A is provided only at one place in the feeding element 113.

The current distribution in the power feeding element 113 will be described with reference to FIG.
Since the feed element 113 has a length of ¼ wavelength, the current distribution during satellite signal reception is a sine wave, the feed point 114A is the highest, and the other end 113B of the feed element 113 far from the feed point 114A. The lowest. Therefore, the half position 113A at which the current distribution is ½ of the highest maximum value is a 1/6 wavelength portion from the feeding point 114A, that is, a position that is 2/3 of the length of the feeding element 113.
Here, since the feeding element 113 is arranged in an arc shape with a central angle of about 90 degrees, as shown in FIG. 2, a line segment L1 connecting the feeding point 114A and the pointer shaft 25, a half position 113A, and a pointer The intersection angle (center angle θ1) with the line segment L2 connecting the axis 25 is about 60 degrees.
In the main dial 11, a flat sector-shaped forbidden region 500 is set by a region surrounded by the line segments L1 and L2 and a line (arc) along the feeding element 113 connecting the feeding point 114A and the half-position 113A. Has been.

The forbidden region 500 is formed in the power feeding element 113 near a portion where the current distribution is as high as ½ or more of the maximum value. In the region where the current distribution is high, it is possible to improve the reception performance by arranging as few metal parts as possible.
Therefore, in the present embodiment, on the surface of the main dial 11, the placement of the sub dial is prohibited in the prohibited area 500, the area other than the prohibited area 500 is set as the placement area 600, and the sub dial is placed in the placement area 600. . Specifically, the indicator display unit 70 that is a sub dial is arranged in the direction of about 8 o'clock with respect to the pointer shaft 25, and the indicator display unit 70 is set not to be arranged in the prohibited area 500.

[Effects of First Embodiment]
According to the present embodiment, the prohibited area 500 is set with reference to a portion where the current distribution in the power feeding element 113 of the antenna body 110 is high, and the indicator display unit 70 that is a sub dial in the main dial 11 is arranged other than the prohibited area 500. Since it arrange | positions in the area | region 600, even when the scale plate 72 of the indicator display part 70 is comprised with electroconductive decoration members, such as a metal, the fall of the receiving performance in the antenna body 110 by the scale plate 72 can be prevented. For this reason, the design property of the scale plate 72 which is a sub dial can be improved, preventing the receiving performance from falling.

  Furthermore, since the prohibited area 500 is set in the range between the feeding point 114A (feeding part 114) and the half-position 113A, it can be suppressed to the minimum necessary range. For this reason, a sub dial can also be arrange | positioned in the range of the other end part 113B of the electric power feeding element 113 from the half position 113A, and the restriction | limiting of the arrangement | positioning freedom degree of a sub dial can be suppressed to the minimum.

  In the present embodiment, the power feeding element 113 is set in the range from the 6 o'clock position to the 3 o'clock position on the main dial 11 and is not arranged around the 12 o'clock position. For this reason, even when the watch brand logo is configured by metal typesetting between the pointer shaft 25 and the 12 o'clock scale (index) of the main dial 11, the metal logo is used as the power feeding element 113. It is possible to prevent the reception performance from being degraded. For this reason, the design of the logo can be improved and the electronic timepiece 1 with a high-class feeling can be provided.

  The scale plate 72 is formed in an arc shape, and is arranged so that a line segment connecting the pointer shaft 75 and the feeding point 114A does not overlap the scale plate 72. For this reason, compared with the case where the scale plate 72 is formed in a ring shape, the scale plate 72 can be disposed away from the feeding point 114A, and the deterioration of the reception performance can be further prevented.

[Second Embodiment]
The electronic timepiece 1A according to the second embodiment shown in FIG. 6 is different from the electronic timepiece 1 according to the first embodiment in that a small timepiece 80 is added as a sub dial provided on the main dial 11 and the arrangement of the small timepiece 80. Accordingly, the arrangement position of the indicator display unit 70 is changed, and the arrangement position of the feeding element 113 of the antenna body 110 is changed. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

In the electronic timepiece 1 </ b> A, two sub dials of an indicator display unit 70 and a small timepiece 80 are arranged on the main dial 11 as sub dials. The indicator display unit 70 is arranged in the direction from 10 o'clock to 11 o'clock with respect to the pointer shaft 25, and the small clock 80 is arranged in the direction of 6 o'clock with respect to the pointer shaft 25.
The indicator display unit 70 includes a metal scale plate 72 indicated by a pointer 71 as in the first embodiment.
The small clock 80 is a 24-hour clock, and includes a metal scale ring 83 indicated by a pointer (hour hand) 81 and a pointer (minute hand) 82. Therefore, the electronic timepiece 1A includes the scale plate 72 and the scale ring 83 as the metallic decorative parts of the sub dial.
Further, since the electronic timepiece 1A includes the small clock 80, the local time (local time) is displayed by the main dial 11 and the hands 21 to 23, and the scale ring 83 and the hands 81 and 82 of the small clock 80 as a sub dial. You can display your home time.

The feeding element 113 of the antenna body 110 is disposed along the outer periphery of the dial plate 10 in the range from the 3 o'clock position to the 12 o'clock position of the main dial 11. The feeding point 114 </ b> A of the antenna body 110 is arranged at the 3 o'clock position of the main dial 11, and the forbidden area 500 is set as a plane sector area connecting the 3 o'clock position and the 1 o'clock position of the main dial 11 and the pointer shaft 25. ing.
In the main dial 11, an indicator display unit 70 and a small clock 80 are arranged in an arrangement area 600 other than the prohibited area 500. In particular, the small timepiece 80 is arranged at the 6 o'clock position of the main dial 11 that could not be arranged in the first embodiment.
Therefore, the indicator display unit 70 and the small clock 80 are arranged in the arrangement area 600 of the main dial 11 and are not arranged in the prohibited area 500.

[Effects of Second Embodiment]
Also in the electronic timepiece 1A of the second embodiment, the same operational effects as the electronic timepiece 1 of the first embodiment can be obtained. That is, since the indicator display unit 70 and the small clock 80 which are sub dials are both arranged in the arrangement area 600 and arranged away from the prohibited area 500, the scale plate 72 and the scale ring 83 can be a metal plate or metal. Plated parts can be used. Therefore, it is possible to prevent the reception performance of the antenna body 110 from being deteriorated, and the design of the indicator display unit 70 and the small clock 80 can be improved.

  Further, since the small clock 80 is arranged in addition to the indicator display unit 70, it is possible to provide an electronic timepiece 1A suitable for the case where it is necessary to check the time of two time zones simultaneously.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in each of the above-described embodiments, the power feeding element 113 that is set so that the circumferential length is ¼ of the wavelength λ shortened by the dielectric substrate 111 is used as the power feeding element. As in the electronic timepiece 1B shown in FIG. 7, a feeding element 113L whose circumferential length is set to ½ of the wavelength λ may be used.
As shown in FIG. 8, the feeding element 113L is provided with a feeding point 114A at an intermediate position in the circumferential direction, and has the highest current distribution between the feeding point 114A and each end 113C, 113D of the feeding element 113L. Half positions 113E and 113F that are ½ of the maximum value are set. Each half position 113E, 113F has a 1/6 wavelength portion from the feeding point 114A, that is, a position that is 2/3 of the length from the feeding point 114A to the end 113C, and a length from the feeding point 114A to the end 113D. The position is set to 2/3.
In addition, in the power feeding element 113L, the length in the circumferential direction may be shortened or lengthened with respect to λ / 2 in order to appropriately adjust the length in order to match the impedance. For this reason, in the present invention, the fact that the feeding element 113L has a length of ½ of the wavelength λ shortened by the dielectric base material 111 is not limited to the one that matches λ / 2, and λ / 2 A certain range such as a length of 90 to 110% is also included. The length of the power feeding element 113L may be set so as to ensure the reception performance by adjusting the impedance.

As shown in FIG. 7, along the line segment L1 connecting the power supply point 114A and the pointer shaft 25, the line segment L3 connecting the half point position 113E and the pointer shaft 25, and the power supply element 113L connecting the power supply point 114A and the half point position 113E. A flat sector-shaped forbidden area 500A is set by an area surrounded by a line (arc).
Further, a line (arc) along a line segment L1 connecting the feeding point 114A and the pointer shaft 25, a line segment L4 connecting the half point position 113F and the pointer shaft 25, and a feeding element 113L connecting the feeding point 114A and the half point position 113F. A flat sector-shaped forbidden area 500B is set by the area surrounded by.
Since these forbidden areas 500A and 500B are arranged adjacent to each other, the forbidden area in the electronic timepiece 1B is the feeding element 113L that connects the line segments L3 and L4 to the half positions 113E and the half positions 113F in the main dial 11. Is set by a region 500C surrounded by a line (arc) along the line. In the prohibited area 500C, the arrangement of sub dials such as the indicator display unit 70 and the small clock 80 is prohibited.
When such a half-wavelength feeding element 113L is used, an antenna that is more efficient than the case where the quarter-wavelength feeding element 113 is used can be configured.

  The sub-dial arranged on the dial 10 is not limited to the indicator display unit 70 and the small clock 80, and may display information such as day of the week, chronograph, small second, morning / afternoon (AM / PM). At this time, two or more pieces of information may be displayed with one sub dial. For example, in a sub-dial having a scale ring, the left half is used for indicator display, like the indicator display unit 70, the right half is used for day of the week display, and the pointer usually indicates the day of the week and performs operations such as displaying information. It may be configured so that an indicator is instructed when it is interrupted.

The arrangement position of the power feeding element 113 in the antenna body 110 is not limited to the above embodiments, and may be set according to the number of sub dials, the arrangement position, and the like.
The antenna body 110 is not limited to the one having the parasitic element 112 and the feeding element 113, and may be an antenna body that does not include the parasitic element 112. Furthermore, the antenna body 110 may not need to shorten the wavelength depending on the type of radio wave. In this case, the antenna body 110 may not be provided with the dielectric substrate 111.

  The antenna body 110 is not limited to a planar annular shape, and may be formed in a planar rectangular frame shape. In this case, the planar shape of the prohibited area 500 may be set to a triangle or a quadrangle.

  Furthermore, the antenna body 110 is not limited to receiving satellite signals transmitted from GPS satellites, and may receive satellite signals transmitted from various position information satellites. For example, the antenna body 110 receives a satellite signal transmitted from a position information satellite of a global navigation satellite system (GNSS) such as GLONASS (Russia), Galileo (European Community), or Beidou (China). Quasi-Zenith Satellite System (QZSS: Japan), IRNSS (Indian Regional Navigational Satellite System: India), DORIS (Doppler Orbitography and Radio-positioning Integrated by Satellite: France), Beidou (China) The satellite signal transmitted from the position information satellite of a regional navigation satellite system (RNSS) such as) may be received.

The antenna body 110 is not limited to the one that receives satellite signals, and may be used as a device that receives a short-range wireless signal of a circularly polarized wireless tag that uses, for example, a 900 MHz band.
Furthermore, the antenna body 110 is not limited to the one used for signal reception, and may be used for signal transmission or may have a transmission / reception function.

  The electronic timepiece of the present invention is only required to have a time display function, and is attached to the user's arm when the user is running, such as a pulse meter that is attached to the user's arm and measures the pulse, and the current position is indicated. It may be a list type device such as a GPS logger that measures and accumulates.

  The electronic device of the present invention is not limited to a wristwatch (electronic timepiece), but is a satellite that is driven by a secondary battery and transmitted from a position information satellite, such as a mobile phone, a portable GPS receiver used for mountain climbing, etc. It can be widely used in devices that receive signals.

  DESCRIPTION OF SYMBOLS 1,1A, 1B ... Electronic timepiece, 10 ... Dial, 11 ... Main dial, 21 ... Pointer, 22 ... Pointer, 23 ... Pointer, 25 ... Pointer shaft, 30 ... Exterior case, 31 ... Case, 32 ... Bezel, 40 DESCRIPTION OF SYMBOLS ... Dial ring, 70 ... Indicator display part, 71 ... Pointer, 72 ... Scale plate, 75 ... Pointer shaft, 80 ... Small clock, 81 ... Pointer, 82 ... Pointer, 83 ... Scale ring, 110 ... Antenna body, 111 ... Dielectric Body base material, 112 ... parasitic element, 112A ... split part, 113, 113L ... feeding element, 113A, 113E, 113F ... half-position, 113B ... other end part, 113C, 113D ... end part, 114 ... feeding part, 114A ... feeding point, 115 ... antenna connection pin, 500, 500A, 500B, 500C ... prohibited region, 600 ... arrangement region, L1, L2, L3, L4 ... line segment.

Claims (6)

An outer case,
An antenna body housed in the exterior case;
A main dial that directs information with the main dial pointer;
An electronic timepiece provided with a sub-dial provided on a surface of the main dial and instructing information by a hand for a sub-dial;
The antenna body is
A feeding element;
A power supply unit that conducts to the power supply element,
The main dial is set with a prohibited area where the placement of the sub dial is prohibited,
The prohibited area is a plan view of the main dial as viewed from the watch surface side.
A line segment connecting a feeding point at which the feeding element and the feeding unit are electrically connected to an axis of the pointer for the main dial;
A line segment connecting the half position where the current distribution is ½ of the maximum value in the power feeding element and the axis of the pointer for the main dial;
A line along the feed element connecting the feed point and the half-position;
An electronic timepiece characterized in that it is a region surrounded by. The electronic timepiece according to claim 1,
The feeding element has a length dimension of a quarter wavelength of a radio wave received by the antenna body,
The electronic timepiece according to claim 1, wherein the half-position is a position that is 2/3 of the length of the power feeding element from the power feeding point. The electronic timepiece according to claim 1 or 2,
The antenna body is
An annular dielectric substrate disposed along the outer periphery of the main dial;
The power supply element formed on the surface of the dielectric substrate,
The axis of the pointer for the main dial is arranged at the plane center position of the main dial,
The prohibited area is
A line segment connecting the feeding point and the plane center position of the main dial;
A line segment connecting the half position and the plane center position of the main dial;
An arc connecting the feeding point and the half position,
An electronic timepiece characterized in that it is a fan-shaped area surrounded by. The electronic timepiece according to any one of claims 1 to 3,
The sub-dial includes an arc-shaped conductive decorative member that is a scale portion indicated by the pointer for the sub-dial,
The electronic timepiece is characterized in that the conductive decorative member is arranged so as not to overlap a line segment connecting the axis of the pointer for the sub dial and the feeding point. The electronic timepiece according to any one of claims 1 to 4,
The feeding element is
In the main dial, the electronic timepiece is arranged in a range from a 2 o'clock scale position to a 10 o'clock scale position in a clockwise direction. The electronic timepiece according to any one of claims 1 to 5,
The sub-dial displays at least one information of a small clock, an indicator, a day of the week, a chronograph, a small second, and an morning / afternoon.

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