JP6390148B2 - Portable device - Google Patents

Description

  The present invention relates to a portable device provided with an antenna.

  In a GPS timepiece that acquires radio wave information from a GPS satellite and displays an accurate time, a clock using a ring-shaped antenna for receiving radio waves has been proposed. The ring-shaped antenna is disposed on the outer peripheral portion of the dial plate, and a spring pin is used for conduction with a circuit board disposed below the ring-shaped antenna (for example, Patent Document 1).

JP 2013-64723 A

  However, when viewed from the circuit side, the spring pin becomes a part of the antenna, and has a structure that is susceptible to degradation of the original antenna performance and internal noise.

  This invention is made | formed in view of the situation mentioned above, and makes it a solution subject to provide the portable apparatus which can perform antenna performance ensuring and noise reduction.

  In order to solve the above-described problems, the portable device according to the present invention is configured such that one end is in contact with the antenna, the circuit board, and the conductive portion of the antenna, and the other end is in contact with the circuit board. Disposed, a power supply pin that electrically connects the antenna and the circuit board, a conductive shield disposed to cover at least a part of the power supply pin, and disposed between the power supply pin and the shield And an insulator.

  According to the present invention, at least a part of the power feed pin whose one end portion is in contact with the conductive portion of the antenna and the other end portion is in contact with the circuit board is covered with the conductive shield. An insulator is disposed between them. Therefore, these power supply pins, insulators, and shields realize a structure similar to that of the coaxial cable, ensuring antenna performance and reducing noise.

  The portable device described above may include a non-conductive ground plate to which the antenna and the circuit board are attached, and the shield may be fixed to the ground plate. In this case, the antenna and the circuit board are attached to the ground plane, and the shield is fixed to the ground plane. Since the feed pin and the insulator are arranged in the shield, the antenna performance can be ensured while reducing noise by using the feed pin, the insulator, and the shield having the same structure as the coaxial cable.

  In the mobile device described above, the fixing portion and the edge portion of the shield are formed on the base plate, a step is formed on the outer peripheral portion of the shield, and the shield has the step on the outer peripheral portion and the edge portion. May be positioned by contact with each other. In this case, the fixed portion formed on the ground plate has an edge portion on the inner peripheral side, and by pressing the shield into the fixed portion, a step between the edge portion of the fixed portion and the outer peripheral portion of the shield is formed. Contact and positioning are performed. As a result, the shield can reliably cover the power feed pin, ensuring antenna performance and reducing noise.

  In the portable device described above, a step is formed in the inner peripheral portion of the shield, a step is formed in the outer peripheral portion of the insulator, and the insulator has the step in the outer peripheral portion of the insulator; You may make it position by the said level | step difference of the said inner peripheral part of a shield contacting. In this case, by pressing the insulator into the inner peripheral portion of the shield, the step on the inner peripheral portion of the shield and the step on the outer peripheral portion of the insulator come into contact with each other, and positioning is performed. As a result, the shield can surely cover the insulator, ensuring antenna performance and reducing noise.

  In the portable device described above, the power supply pin, the shield, and the insulator may be formed as an integral power supply member. In this case, since the power supply pin, the insulator, and the shield are an integral power supply member, it is only necessary to press-fit the integral power supply member into the ground plane, and the number of assembly steps can be reduced.

  In the portable device described above, the power supply pin may be slidable in any end direction of the power supply pin. In this case, even when the power feed pin, the insulator, and the shield are integrated as a power feed member, the contact state of the power feed pin with respect to the antenna and the circuit board is kept good.

  The portable device described above may include a circuit pressing member that covers the circuit board, and the circuit pressing member may electrically connect the shield and the ground of the circuit board. In this case, since the potential of the shield becomes the ground potential of the circuit board, the antenna performance can be ensured and noise can be surely reduced.

  In the portable device described above, the power supply pin may perform non-equilibrium power supply to the antenna. In this case, since the power is supplied to the antenna by a single power supply pin, the structure is simplified.

  In the portable device described above, the portable device may be a wristwatch. In this case, a wristwatch with good reception performance can be provided.

1 is an overall view of a GPS including an electronic timepiece according to an embodiment of the present invention. It is a perspective view which shows the whole electronic timepiece. FIG. 6 is a six-side view showing the entire electronic timepiece. It is a fragmentary sectional view showing the outline of an electronic timepiece. It is a schematic plan view which shows the external appearance of an electronic timepiece. It is an electric control block diagram of an electronic timepiece. It is a top view which shows the external appearance of an antenna. It is a bottom view which shows the external appearance of an antenna. It is an expansion | deployment perspective view which shows the external appearance of an antenna, a ground plane, a feed pin, an insulator, and a ground pin. It is a top view which shows the external appearance of a ground plane. It is an expansion | deployment perspective view which shows the state by which the ground pin, the insulator, and the electric power feeding pin were attached to the ground plane. It is a top view which shows the state by which the ground pin, the insulator, and the electric power feeding pin were attached to the ground plane. It is an expansion | deployment perspective view which shows the state which installed the antenna in the ground plane from the state shown in FIG. It is a top view which shows the state which installed the antenna in the ground plane from the state shown in FIG. It is sectional drawing of the surroundings of the installation position of a feed pin, an insulator, and a ground pin. It is sectional drawing of a feed pin. It is an expanded sectional view of a feed pin, an insulator, a ground plane, and a ground pin. It is a development perspective view of a feed pin, an insulator, and a ground pin. It is the perspective view which looked at the electronic timepiece which attached the circuit holder from the bottom face side. It is a figure which shows the receiving characteristic of the antenna at the time of using the electric power feeding structure of this invention. It is a figure which shows the receiving characteristic of the antenna at the time of using the electric power feeding structure of a comparative example. It is sectional drawing of the installation position periphery of the electric power supply pin in 2nd Embodiment of this invention, an insulator, and a ground pin. It is sectional drawing of a feed pin.

  Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. However, in each figure, the size and scale of each part are appropriately changed from the actual ones. Further, since the embodiments described below are preferable specific examples of the present invention, various technically preferable limitations are attached thereto. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

<First Embodiment>
<A: Outline of electronic watch>
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a GPS including an electronic timepiece according to the first embodiment of the present invention. First, an outline of a GPS in which an electronic timepiece as an example of a portable device obtains current location information and time information using radio waves as external signals will be described.

  The electronic timepiece 10 is a wristwatch that receives radio waves (satellite signals) from the GPS satellite 8 and corrects the internal time. ) Is displayed. The GPS satellite 8 is a navigation satellite orbiting in a predetermined orbit above the earth, and transmits a navigation message superimposed on a 1.57542 GHz radio wave (L1 wave) to the ground. In the following description, the 1.57542 GHz radio wave on which the navigation message is superimposed is referred to as a satellite signal. The satellite signal is a right-handed circularly polarized wave.

  Currently, there are about 31 GPS satellites 8 (only four are shown in FIG. 1), and in order to identify which GPS satellite 8 the satellite signal is transmitted from, each GPS satellite 8 has C A peculiar pattern of 1023 chips (1 ms cycle) called a / A code (Coarse / Acquisition Code) is superimposed on the satellite signal. In the C / A code, each chip is either +1 or -1, and looks like a random pattern. Therefore, by correlating the satellite signal and the pattern of each C / A code, the C / A code superimposed on the satellite signal can be detected.

  The GPS satellite 8 is equipped with an atomic clock, and the satellite signal includes extremely accurate GPS time information measured by the atomic clock. Further, a slight time error of the atomic clock mounted on each GPS satellite 8 is measured by the control segment on the ground, and the satellite signal includes a time correction parameter for correcting the time error. The electronic timepiece 10 receives a satellite signal transmitted from one GPS satellite 8, and uses the GPS time information and the time correction parameter included therein to obtain an accurate time (time information) as an internal time. And

  The satellite signal includes orbit information indicating the position of the GPS satellite 8 on the orbit. The electronic timepiece 10 can perform positioning calculation using GPS time information and orbit information. The positioning calculation is performed on the assumption that a certain amount of error is included in the internal time of the electronic timepiece 10. That is, in addition to the x, y, and z parameters for specifying the three-dimensional position of the electronic timepiece 10, the time error is also an unknown number. For this reason, the electronic timepiece 10 generally receives satellite signals transmitted from four or more GPS satellites 8 and performs positioning calculation using GPS time information and orbit information included therein to determine the current location. Find location information.

Next, a schematic configuration of the electronic timepiece 10 will be described. FIG. 2 is a perspective view showing the external appearance of the electronic timepiece, and FIG. 3 is a six-side view showing the external appearance of the electronic timepiece. FIG. 4 is a partial cross-sectional view showing an outline of the electronic timepiece.
FIG. 3A is a plan view of the electronic timepiece as viewed from the front side. FIG.3 (b) is the side view which looked at 9 o'clock direction from 3 o'clock direction. FIG.3 (c) is the side view which looked at 6 o'clock direction from 12 o'clock direction. FIG. 3D is a side view of the 3 o'clock direction viewed from 9 o'clock direction, and FIG. 3E is a side view of the 12 o'clock direction viewed from 6 o'clock direction. FIG. 3F is a plan view seen from the back side. In addition, the electronic timepiece of this embodiment has a world time function and a chronograph function.

  As shown in FIGS. 2 and 3, the electronic timepiece 10 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 11 is disposed as a time display portion via a ring-shaped dial ring 40 made of plastic.

  The dial 11 is provided with hands 21, 22, and 23. Further, the dial 11 has a first small window 70 and a pointer 71 that are circular in the 2 o'clock direction from a center, and a second small window 80 and a pointer 81 that is circular in the 10 o'clock direction are circular in the 6 o'clock direction. The third small window 90 and the pointer 91 are provided, and the calendar small window 15 that is rectangular in the 4 o'clock direction is provided. The dial 11, the hands 21, 22, 23, the first small window 70, the second small window 80, the third small window 90, the calendar small window 15, and the like are visible through the cover glass 33.

  On the side surface of the exterior case 30, the A button 61 is positioned at the 8 o'clock position, the B button 62 is positioned at the 10 o'clock position, the C button 63 is positioned at the 2 o'clock position, and the 4 o'clock position. A D button 64 is provided at a position in the direction, and a crown 50 is provided at a position in the 3 o'clock direction. When these A button 61, B button 62, C button 63, D button 64, and crown 50 are operated, an operation signal corresponding to the operation is output.

As shown in FIG. 4, in the electronic timepiece 10, among the two openings of the metal outer case 30, the opening on the front surface side is closed with the cover glass 33 via the bezel 32, and the opening on the back surface side Is closed by a back cover 34 made of metal.
Inside the outer case 30, the dial ring 40 attached to the inner periphery of the bezel 32, the light-transmitting dial plate 11, the pointer shaft 25 penetrating the dial plate 11, and the needle shaft 25 circulates around the needle shaft 25. Needles 21, 22, and 23, and a driving mechanism 140 that drives the hands 21, 22, and 23 are provided.
The pointer shaft 25 is provided along a central axis that passes through the center of the exterior case 30 in plan view and extends in the front-back direction.

  The dial ring 40 has an outer peripheral end in contact with the inner peripheral surface of the bezel 32, a flat plate portion parallel to the cover glass 33, and an inner peripheral end in contact with the dial plate 11. An inclined part inclined to the side is provided. The dial ring 40 has a ring shape in plan view and a mortar shape in sectional view. A donut-shaped storage space is formed by the flat plate portion of the dial ring 40, the inclined portion, and the inner peripheral surface of the bezel 32, and the ring-shaped antenna 110 is stored in the storage space.

  The antenna 110 is formed by using a ring-shaped dielectric as a base material and forming a metal antenna pattern on the base material by plating or silver paste printing. The antenna 110 is disposed on the outer periphery of the dial plate 11, disposed on the inner peripheral surface side of the bezel 32, and further covered with a dial ring 40 formed of plastic and a cover glass 33, so that excellent reception is achieved. It is possible to ensure. As the dielectric, a dielectric material that can be used at high frequencies, such as titanium oxide, can be mixed with a resin, and the antenna can be downsized by shortening the wavelength of the dielectric.

  The dial 11 is a circular plate that displays the time inside the outer case 30, is formed of a light-transmitting material such as plastic, and includes hands 21, 22, and 23 between the cover glass 33, It is arranged inside the dial ring 40.

  Between the dial plate 11 and the ground plate 125 to which the drive mechanism 140 is attached, a solar panel 135 that performs photovoltaic power generation is provided. The solar panel (solar cell) 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 solar panel 135 also has a sunlight detection function. On the dial plate 11, the solar panel 135, and the ground plate 125, the pointer shaft 25, the pointer 71 of the first small window 70, the pointer 81 of the second small window 80, and the pointer shaft of the pointer 91 of the third small window 90 (not shown). And the opening of the calendar small window 15 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 has a step motor and a wheel train such as a gear, and the hands 21, 22 and 23 are driven by the step motor rotating the needle shaft 25 via the wheel train. 2 and 3, the pointer 71 of the first small window 70, the pointer 81 of the second small window 80, and the pointer 91 of the third small window 90 also have a similar drive mechanism (not shown). The hands 71, 81, 91 are driven.

The circuit board 120 includes a receiving unit (GPS module) 122, a control unit 150, and a secondary battery 130 such as a lithium ion battery. The secondary battery 130 is charged with the power generated by the solar panel 135.
In addition, the circuit board 120 and the antenna 110 are connected using a power feed pin 115. An antenna pattern is formed on the antenna 110, and one end of the feed pin 115 is in contact with the antenna pattern. The power feed pin 115 is made of metal, and the other end of the power feed pin 115 is in contact with the circuit board 120. As a result, power is supplied to the antenna 110. The power supply pin 115 is included in the insulator 116, and the insulator 116 is included in the ground pin 117. The ground pin 117 including the power feed pin 115 and the insulator 116 is press-fitted and fixed in a through hole formed in the ground plate 125. Details will be described later.
A circuit holder 123 connected to the ground potential of the circuit board 120 is provided below the circuit board 120. A spring 123 a is formed on the circuit holder 123, and the spring 123 a is in contact with the ground pin 117. Details will be described later.

  The ground plate 125 is made of plastic parts, has a mounting portion for the drive mechanism 140 and the secondary battery 130 inside, and a solar panel 135 and a fixing portion for the dial 11 are provided on the upper surface.

<B: Electronic watch display function>

Next, the display function of the electronic timepiece 10 will be described. FIG. 5 is a schematic plan view showing the appearance of the electronic timepiece.
As shown in FIG. 5, on the outermost periphery of the dial 11, a scale that divides the outer circumference into 6 to 60 divisions and a 1/5 scale that divides the scale into 5 divisions are written. Using this scale, the hand 21 displays “second” of the chronograph function, the hand 22 displays “minute” of the internal clock, and the hand 23 displays “hour” of the internal clock. The chronograph function can be used by operating the C button 63 and the D button 64.

  On the outer periphery of the circular first small window 70 provided on the dial 11, a scale that divides the outer periphery into 60 divisions and numbers in increments of 10 from “10” to “60” are written. The pointer 71 displays “minute” of the chronograph function using this scale.

On the outer periphery of the circular second small window 80 provided on the dial 11, a scale that divides the outer periphery into 60 divisions and numbers from “0” to “11” are written. The pointer 81 displays “second” of the internal clock using this scale.
The alphabet “Y” is written at the 52 second position of the second small window 80, and the alphabet “N” is written at the 38 second position. This alphabetic character represents the reception result of the satellite signal (Y: reception success, N: reception failure) and the setting of automatic reception of the satellite signal (Y: automatic reception ON, N: automatic reception OFF). When the user operates the B button 62, the pointer 81 indicates either “Y” or “N”, and displays the reception result of the satellite signal. The user can set ON / OFF of automatic reception of satellite signals by operating the A button 61 and the B button 62 and setting the pointer 81 to “Y” or “N”. When the user operates the B button 62 to cause the electronic timepiece 10 to manually receive a satellite signal, the hands 71 display the number of captured satellites.
In this embodiment, the notation “Y” is provided at the position of 52 seconds and the notation “N” is provided at the position of 38 seconds. However, the present invention is not limited to this. The notation “Y” and “N” is preferably provided at a position where the small window including the reception result display is easily provided.

The outer periphery of the circular third small window 90 provided on the dial 11 will be described. In the following description of the outer peripheral range, “n-hour direction” (n is an arbitrary natural number) is the direction when the circular outer periphery is viewed from the center of the third small window 90.
On the outer periphery of the range from the 12 o'clock direction to the 6 o'clock direction of the third small window 90, a scale that divides this range into 6 and numbers from “0” to “5” are written. The pointer 91 displays “hour” of the chronograph function using this scale. In the chronograph function, it is possible to measure time up to 5 hours 59 minutes 59 seconds using the hands 21, 71, 91.

  On the outer periphery of the third small window 90 in the range from 6 o'clock to 7 o'clock, the letter “DST” and the symbol “◯” are written. DST (daylight saving time) means daylight saving time. These letters and symbols represent the setting of daylight saving time (DST: daylight saving time ON, ○: daylight saving time OFF). By operating the crown 50 and the B button 62 by the user and setting the hands 91 to “DST” or “◯”, the electronic timepiece 10 can be set to ON / OFF for daylight saving time.

  On the outer periphery of the third small window 90 in the range from 7 o'clock to 9 o'clock, a crescent sickle-shaped symbol 92 is formed along the circumference, with the base end in the 9 o'clock direction being thick and the tip in the 7 o'clock direction being thin. It is written. The symbol 92 is a power indicator of the secondary battery 130 (see FIG. 4), and the pointer 91 indicates one of the base end, the tip end, and the middle according to the remaining battery level.

  On the outer periphery of the third small window 90 in the range from 9 o'clock to 10 o'clock, an airplane-shaped symbol 93 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 user can stop the reception of the satellite signal of the electronic timepiece 10 by operating the A button 61 and selecting the symbol 93 (in-flight mode) with the hands 91.

  On the outer periphery of the third small window 90 in the range from the 10 o'clock direction to the 12 o'clock direction, a number “1” and a symbol “4+” are written. These numbers and symbols represent satellite signal reception modes. “1” means that the GPS time information is received and the internal time is corrected, and “4+” means that the GPS time information and the orbit information are received, and the internal time and a time zone described later are corrected. . When the user operates the B button 62, the hands 91 indicate “1” or “4+”, and the reception mode of the satellite signal received immediately before by the electronic timepiece 10 is displayed.

  The calendar small window 15 is provided in an opening portion in which the dial 11 is opened in a rectangular shape, and numbers can be visually recognized from the opening portion. This number represents the “day” of the date.

Here, the relationship among Coordinated Universal Time (UTC), time difference, standard time, and time zone will be described.
A time zone is an area that uses a common standard time, and currently there are 40 types of time zones. Each time zone is distinguished by a time difference between standard time and UTC. For example, Japan belongs to a time zone of +9 hours using standard time which is 9 hours ahead of UTC. The standard time used in each time zone can be obtained from UTC and the time difference between UTC.

As described above, the dial 11 is engraved with a scale indicating 60 minutes and seconds, and the dial ring 40 surrounding the outer periphery of the dial 11 has a time difference from UTC along the scale. The time difference information 45 representing “” is represented by numerals and symbols other than numerals. The numeric time difference information 45 is an integer time difference, and the symbol time difference information 45 is displayed by hands 22, 23, 81 indicating that it is a non-integer time difference. The time difference between the internal time and UTC is The time difference information 45 indicated by the pointer 21 can be confirmed by 50 operations.
The electronic timepiece 10 can represent internal time corresponding to up to 60 different time differences by assigning a temporary difference to one scale of 60 scales provided on the dial 11. In the present embodiment, the time difference information 45 of the “UTC” symbol represents the world coordinated time, which is the standard of the time difference, and the time difference information 45 of the “•” symbol represents a time difference other than an integer. May be used to indicate.

  In the present embodiment, the time difference information 45 of the “·” symbol written between the numbers “8” and “9” on the dial ring 40 represents a time difference of +8.75 hours (+8 hours 45 minutes). , Means UTC + 8.75 hours as the standard time zone. Currently, there are 40 types of time zones in the world including this standard time, and the time difference representing the 40 types of time zones is written as time difference information 45 on the dial ring 40 of the electronic timepiece 10. The time zone display is preferably within 60 types. If it exceeds 60 types, the display becomes small and it may be difficult to determine.

  In the bezel 32 provided around the dial ring 40, city information 35 representing the representative city name of the time zone using the standard time corresponding to the time difference of the time difference information 45 written on the dial ring 40, The time difference information 45 is also written. In this embodiment, the city information 35 is described using a three-letter code in which the city name is abbreviated with a three-letter alphabet. “LON” is London, “PAR” is Paris, “CAI” is Cairo, “JED” is Jeddah, “DXB” is Dubai, “KHI” is Karachi, “DEL” is Delhi, “DAC” is Dhaka, “BKK” ”Is Bangkok,“ BJS ”Beijing,“ TYO ”is Tokyo,“ ADL ”is Adelaide,“ SYD ”is Sydney,“ NOU ”is Nemea,“ WLG ”is Wellington,“ TBU ”is Nukualofa,“ CXI ”is Kirisima Si Island, "MDY" is Midway Island, "HNL" is Honolulu, "ANC" is Anchorage, "LAX" is Los Angeles, "DEN" is Denver, "CHI" is Chicago, "NYC" is New York, "CCS" is Caracas, “SCL” for Santiago, “RIO” for Rio de Janeiro, “FEN” for Fernando de Noronha, “PD "I represent the Azores, respectively. For example, the code “TYO” represents Tokyo, and the number “9” in the time difference information 45 written on the dial ring 40 corresponding to this code makes it easy for Tokyo to use UTC + 9 hours standard time. Can be judged. In addition, the code “CXI” represents the island of Kirisimai, and from the number “14” of the time difference information 45 written along the dial ring 40 corresponding to this code, the island of Kirisimai uses UTC + 14 hours standard time. Can be easily determined. In the present embodiment, the representation of the representative city names corresponding to the time differences of some of the time difference information 45 is omitted in order to limit the display space and improve the visibility. Moreover, the representation method of a representative city name is an example, and may be represented by other methods. The notation of the time difference information 45 and the city information 35 is referred to as a time zone display 46. In this embodiment, a time zone display 46 equal to the number of time zones used all over the world is shown.

<C: Electrical configuration of electronic watch>
Next, the electrical configuration of the electronic timepiece 10 will be described.
FIG. 6 is an electric control block diagram of the electronic timepiece. As shown in FIG. 6, the electronic timepiece 10 includes a control unit 150 having a basic configuration of a CPU (Central Processing Unit) 153, a RAM (Random Access Memory) 154, and a ROM (Read Only Memory) 155, and a receiving unit (GPS module). ) 122, an input device 157, and peripheral devices for the drive mechanism 140. Each of these devices transmits and receives data via the data bus 159. The input device 157 is the crown 50, the A button 61, the B button 62, the C button 63, and the D button 64 shown in FIG. The electronic timepiece 10 includes a rechargeable secondary battery 130 (see FIG. 4) serving as a power source.

  The receiving unit 122 includes an antenna 110, processes satellite signals received via the antenna 110, and acquires GPS mode time information and position information. The antenna 110 transmits a radio wave of a satellite signal transmitted from a plurality of GPS satellites 8 (see FIG. 1) orbiting the earth over a predetermined orbit and passing through the cover glass 33 and the dial ring 40 shown in FIG. Receive.

  Although not shown, the receiving unit 122 is an RF (Radio Frequency) unit that receives a satellite signal transmitted from the GPS satellite 8 (see FIG. 1) and converts it into a digital signal, as in a normal GPS device. The GPS time information and the position information (positioning information) are acquired from the BB unit (baseband unit) that performs correlation determination of the received signal and demodulates the navigation message, and the navigation message (satellite signal) demodulated by the BB unit. And an information acquisition unit for outputting. That is, the receiving unit 122 functions as a receiving unit that receives a satellite signal transmitted from the GPS satellite 8 and outputs GPS time information and position information based on the reception result.

  The RF unit includes a bandpass filter, a PLL circuit, an IF filter, a VCO (Voltage Controlled Oscillator), an ADC (A / D converter), a mixer, an LNA (Low Noise Amplifier), an IF amplifier, and the like. The satellite signal extracted by the bandpass filter is amplified by the LNA, mixed with the VCO signal by the mixer, and down-converted to IF (Intermediate Frequency). The IF mixed by the mixer passes through the IF amplifier and IF filter, and is converted to a digital signal by the ADC.

  The BB unit generates a local code generating unit that generates a local code composed of the same C / A code as that used at the time of transmission by the GPS satellite 8, and a correlation value between the local code and a reception signal output from the RF unit. And a correlation unit to calculate. If the correlation value calculated by the correlation unit is equal to or greater than a predetermined threshold, the C / A code used for the received satellite signal matches the generated local code, and the satellite signal is Can be captured (synchronized). Therefore, the navigation message can be demodulated by correlating the received satellite signal with the local code.

  The information acquisition unit acquires GPS time information and position information from the navigation message demodulated by the BB unit. The navigation message includes preamble data, HOW word TOW (Time of Week, also referred to as “Z count”), and subframe data. There are subframe data from subframe 1 to subframe 5, and each subframe includes, for example, satellite correction data including week number data and satellite health data, and ephemeris (detailed orbit information for each GPS satellite 8). ) And almanac (rough orbit information of all GPS satellites 8). Therefore, the information acquisition unit can acquire GPS time information and navigation information by extracting a predetermined data portion from the received navigation message.

The RAM 154 and the ROM 155 are storage units of the electronic timepiece 10.
The ROM 155 stores programs executed by the CPU 153, time zone information, and the like. The time zone information is data for managing position information (latitude / longitude) of a region (time zone) using a common standard time and a time difference with respect to UTC.
The CPU 153 uses the RAM 154 as a work area and executes various programs, controls, and timings by executing programs stored in the ROM 155. This timing is performed, for example, by counting the number of reference signal pulses from an oscillation circuit (not shown).

  The CPU 153 includes time information calculated from GPS time information and time correction parameters, current position information (latitude and longitude) calculated from GPS time information and orbit information, and a time zone stored in the ROM 155 (storage unit). Correct the internal clock based on the information. The CPU 153 performs control to drive the drive mechanism 140 so that the internal time is displayed. Thereby, the internal time is displayed on the electronic timepiece 10 by the hands 22, 23, 81 (see FIG. 5).

<D: Configuration of antenna feeding member in electronic timepiece>
Next, the configuration of the antenna power supply member in the electronic timepiece 10 will be described. In the present embodiment, a power feeding member is configured by the power feeding pin 115, the insulator 116, and the ground pin 117 as a shield.
FIG. 7 is a plan view of the antenna 110, and FIG. 8 is a bottom view of the antenna 110. As shown in FIGS. 7 and 8, the antenna 110 of the present embodiment is formed in a ring shape, and a first antenna pattern 112 is formed on the upper surface of the antenna 110. The first antenna pattern 112 is formed by performing plating or paste printing using a metal or other conductive material. As shown in FIG. 7, the first antenna pattern 112 has a notch 112a and is formed in a C shape with a part of the ring cut out.
A second antenna pattern 113 is formed on the inner peripheral side surface of the antenna 110. Similar to the first antenna pattern 112, the second antenna pattern 113 is formed by performing plating, paste printing, or the like using a metal or other conductive material. The second antenna pattern 113 is an arc-shaped element as shown in FIG. 7, and is formed so as to maintain a certain distance from the first antenna pattern 112. One end of the second antenna pattern 113 is connected to a power feeding land portion 113b on the bottom surface shown in FIG. 8 through a bottom surface conducting portion 113a.
The power feeding land portion 113b is in contact with the power feeding pin 115 on the bottom surface side of the antenna 110, as will be described later. Therefore, the bottom surface conductive portion 113 a of the second antenna pattern 113 connected to the power feeding land portion 113 b is a power feeding position where power is fed via the power feeding pin 115. Since the second antenna pattern 113 is secured for a predetermined length from the feeding position to the left rotation direction side shown in FIG. 7, radio waves of right-handed polarization can be received satisfactorily.

FIG. 9 is an exploded perspective view showing the antenna 110, the ground plane 125, the feeding pin 115, the insulator 116, and the ground pin 117. As shown in FIGS. 7 to 9, notches 110a are formed at three locations on the outer periphery of the antenna 110, and flanges 110b are provided on the notches 110a. When the flange portion 110b and the antenna hook portion 125c of the ground plate 125 are engaged, the antenna 110 is positioned in the height direction with respect to the ground plate 125.
As shown in FIGS. 8 and 9, six notches 110 c are formed from the bottom surface of the antenna 110 to the side surface close to the bottom surface. The notch part 110c and the convex part 125a formed in the ground plate 125 as shown in FIG. 9 engage with each other, thereby positioning the antenna 110 in the plane direction with respect to the ground plate 125.

  FIG. 10 is a plan view showing the main plate 125. As shown in FIGS. 9 and 10, the ground plane 125 has a convex portion 125 a for positioning the antenna 110 in the plane direction, an antenna hook portion 125 c for positioning the antenna 110 in the height direction, and a height of the antenna 110. There are provided urging portions 125d and 125e that urge in the vertical direction, and ground pin holes 127 into which the ground pins 117 including the power supply pins 115 and the insulator 116 are press-fitted and fixed. The ground pin hole 127 functions as a fixing portion that fixes the ground pin 117.

  The ground pin 117 is press-fitted and fixed to the ground pin hole 127 from the bottom surface side of the ground plate 125, and the insulator 116 is press-fitted and fixed to the ground pin 117 from the upper surface side of the ground plate 125. Furthermore, the power supply pin 115 is inserted into the insulator 116 from the upper surface side of the ground plate 125. Details will be described later.

FIG. 11 is a developed perspective view showing a state in which the ground pin 117 and the insulator 116 are press-fitted and fixed in the ground pin hole 127 of the ground plate 125 and the power supply pin 115 is inserted, and FIG. 12 shows the ground plate 125 in the state shown in FIG. FIG.
As shown in FIGS. 11 and 12, the top of the feed pin 115 is located on the installation surface of the antenna 110 on the ground plate 125. By installing the antenna 110 on the installation surface, the feed pin 115 and the antenna 110 are connected. The power feeding land portion 113b comes into contact.

13 is a developed perspective view showing a state where the antenna 110 is installed on the installation surface of the antenna 110 on the ground plate 125 from the state shown in FIG. 12, and FIG. 14 is a plan view showing the ground plate 125 and the antenna 110 in the state shown in FIG. It is.
As shown in FIGS. 13 and 14, the notch 110 c on the outer periphery of the antenna 110 and the convex portion 125 a of the ground plate 125 engage with each other, thereby positioning the antenna 110 in the plane direction (circumferential direction) with respect to the ground plate 125. Done.
Further, as shown in FIGS. 13 and 14, the ground plate 125 of the antenna 110 is engaged with the flange portion 110 b provided in the notch 110 a on the outer periphery of the antenna 110 and the antenna hook portion 125 c of the ground plate 125. A downward positioning with respect to is performed.

15 is a partially enlarged cross-sectional view of a portion where the power feed pin 115 is installed, and FIG. 16 is a partially enlarged cross-sectional view of the power feed pin 115. As shown in FIG. 15, a metal ground pin 117 is inserted into the ground pin hole 127, and a resin insulator 116 is inserted into the ground pin 117. A metal power supply pin 115 is inserted in the insulator 116.
As shown in FIG. 16, the power supply pin 115 includes a fixed terminal 115a, a body portion 115b, a spring 115c, and a sliding terminal 115d. The trunk portion 115b is a hollow cylindrical member having a flange portion 115b-1 formed at the upper end portion, and openings are formed at the upper end portion and the lower end portion.
The fixed terminal 115a includes a flange portion 115a-1, a convex spherical portion 115a-2 formed on the upper surface of the flange portion 115a-1, and a shaft portion 115a-3 formed on the lower surface of the flange portion 115a-1. It is integrally formed. The shaft portion 115a-3 of the fixed terminal 115a is inserted into the opening at the upper end portion of the body portion 115b and is fitted to the body portion 115b. As shown in FIG. 15, the convex spherical portion 115 a-2 of the fixed terminal 115 a is a tip portion that contacts the power feeding land portion 113 b of the antenna 110.
The sliding terminal 115d is a needle-like member, and slides on the first sliding portion 115d-1 that slides with the hollow inner wall surface of the trunk portion 115b, and the second inner wall surface that slides on the lower end portion of the trunk portion 115b. The sliding portion 115d-2 and the tip protrusion 115d-3 are integrally formed. The tip protrusion 115d-3 of the sliding terminal 115d is a tip that contacts the circuit board 120 as shown in FIG.
A spring 115c is disposed between the fixed terminal 115a and the sliding terminal 115d, and the sliding terminal 115d is urged in the direction of arrow A in FIG. 16 with respect to the fixed terminal 115a and the body 115b. . Therefore, by arranging the power feed pin 115 as shown in FIG. 15, the contact state of the tip protrusion 115d-3 with respect to the circuit board 120 in the sliding terminal 115d is favorably maintained. The power supply pin 115 is slidable in the vertical direction with respect to the insulator 116, and the fixed terminal 115a of the power supply pin 115 is biased in the opposite direction with respect to the slide terminal 115d. The contact state of the terminal 115a with the power feeding land portion 113b is maintained well.

Next, positioning of the insulator 116 and the ground pin 117 will be described with reference to FIGS. 17 and 18. 17 is a developed cross-sectional view of the power supply pin 115, the insulator 116, the ground plane 125, and the ground pin 117, and FIG. 18 is a developed perspective view of the power supply pin 115, the insulator 116, and the ground pin 117.
As shown in FIGS. 17 and 18, a step 117 a protruding outward is formed on the outer peripheral portion of the ground pin 117. The ground plate 125 is formed with a ground pin hole 127 penetrating the ground plate 125, and an edge portion 125 b is formed on the bottom surface of the ground plate 125. The outer diameter R1 at the center of the ground pin 117 is smaller than the inner diameter R3 of the ground pin hole 127, and the ground pin 117 can be press-fitted and fixed to the ground pin hole 127. By press-fitting and fixing the ground pin 117 to the ground pin hole 127, the step 117 a of the ground pin 117 contacts the edge 125 b of the ground plate 125, and the ground pin 117 is positioned with respect to the ground plate 125.
On the outer periphery of the insulator 116, a step 116a protruding outward is formed. A step 117b is formed on the inner peripheral portion of the ground pin 117. The outer diameter R4 at the center of the insulator 116 is smaller than the inner diameter R2 of the ground pin 117, and the insulator 116 can be press-fitted and fixed to the ground pin 117. By press-fitting and fixing the insulator 116 to the ground pin 117, the step 116 a of the insulator 116 contacts the step 117 b of the ground pin 117, and the insulator 116 is positioned with respect to the ground pin 117.
An inner diameter R5 of the insulator 116 is sufficiently larger than an outer diameter R6 of the body portion 115b of the power supply pin 115, and the power supply pin 115 can slide with respect to the insulator 116. Therefore, as shown in FIG. 15, the ground pin 117 is press-fitted and fixed to the ground pin hole 127, the insulator 116 is press-fitted and fixed to the ground pin 117, and the power supply pin 115 is further inserted into the insulator 116. By attaching the antenna 120 and the antenna 110, the tip protrusion 115d-3 of the sliding terminal 115d biased by the spring 115c reliably contacts the circuit board 120, and the reaction force causes the convex spherical portion 115a of the fixed terminal 115a. -2 is surely in contact with the power feeding land portion 113b of the antenna 110.

  In the state where the ground pin 117 is press-fitted and fixed in the ground pin hole 127, the surface of the lower portion is exposed from the ground plane 125. In the present embodiment, a spring 123 a is provided on the circuit holder 123, and the spring 123 a is in contact with the surface of the ground pin 117. FIG. 19 is a perspective view of the electronic timepiece 10 viewed from the bottom side with the circuit holder 123 attached to the base plate 125. The circuit holder 123 is electrically connected to the ground of the circuit board 120 and has a ground potential. Therefore, when the spring 123a provided on the circuit holding member 123 is brought into contact with the ground pin 117 as shown in FIG. 19, the ground pin 117 is at the ground potential.

As described above, in this embodiment, the structure is the same as that of the coaxial cable in which the insulator 116 surrounds the power supply pin 115 that is the central conductor, and further the ground pin 117 that is the outer conductor surrounds the insulator 116. . The ground pin 117 functions as a shield that blocks signal leakage to the outside and intrusion of radio waves from the outside. As a result, the reception sensitivity of the antenna 110 can be improved.
FIG. 20 is a diagram illustrating reception characteristics of left-handed polarized waves and reception characteristics of right-handed polarized waves when the feed pin 115, the insulator 116, and the ground pin 117 of the present embodiment are used, and FIG. It is a figure which shows the reception characteristic of the left-handed polarized wave and the reception characteristic of the right-handed polarized wave in the comparative example using only the feed pin 115 without using the pin 117.
As is clear from comparison between FIG. 20 and FIG. 21, by using the power feeding structure of the present embodiment, it is possible to confirm a clear difference between the reception characteristics of the left-handed polarization and the reception characteristics of the right-handed polarization. In the case of the present embodiment, right-handed polarized waves can be received efficiently, and reception efficiency can be improved.
In addition, since this embodiment performs unbalanced power feeding to the antenna 110, it is only necessary to include a pair of power feeding pins 115, an insulator 116, and a ground pin 117, and the structure can be simplified. .

  Note that the inner diameter of the ground pin 117 and the outer diameter of the power feed pin 115 are determined by the dielectric constant of the insulator 116. However, the smaller the dielectric constant, the smaller the inner diameter of the ground pin 117. In order to place the insulator 116, a material having a low dielectric constant is preferable.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first example in that the power supply pin is configured to be movable at both ends.
As shown in FIG. 23, the power supply pin 115 of this embodiment uses a sliding terminal 115e instead of a fixed terminal, and includes two sliding terminals 115d and 115e.
The sliding terminal 115e is a needle-like member, and the first sliding portion 115e-1 that slides with the hollow inner wall surface of the trunk portion 115b and the second sliding surface with the opening inner wall surface at the upper end portion of the trunk portion 115b. The sliding portion 115e-2 and the tip protrusion 115e-3 are integrally formed. The tip protrusion 115e-3 is a portion that contacts the power feeding land 113b of the antenna 110.
Similarly to the first embodiment, the sliding terminal 115d is a needle-like member, and includes a first sliding portion 115d-1 that slides on the hollow inner wall surface of the trunk portion 115b, and an opening at the lower end portion of the trunk portion 115b. A second sliding portion 115d-2 that slides with the inner wall surface and a tip protrusion 115d-3 are integrally formed. The tip protrusion 115d-3 of the sliding terminal 115d is a portion that contacts the circuit board 120.

A spring 115c is disposed between the sliding terminal 115e and the sliding terminal 115d, and the sliding terminal 115e is urged in the direction of arrow B in FIG. The sliding terminal 115d is urged in the arrow A direction in FIG.
In the present embodiment, as shown in FIG. 22, there is no gap between the insulator 116 and the power supply pin 115, and the power supply pin 115 is press-fitted into the insulator 116. That is, in the present embodiment, the power feed pin 115, the insulator 116, and the ground pin 117 constitute an antenna power feed member.
Even when the power feeding member is integrally formed as described above, the sliding terminal 115e and the sliding terminal 115d are urged against the trunk portion 115b, and can slide in any tip direction of the power feeding pin 115. Yes. Therefore, by arranging the power feed pin 115 as shown in FIG. 22, the contact state of the tip protrusion 115e-3 with the antenna 110 on the power feed land 113b of the sliding terminal 115e is maintained well, and the sliding terminal 115d The contact state of the tip protrusion 115d-3 with the circuit board 120 is maintained well.

  In the present embodiment, since the power supply pin 115 is movable at both ends, the ground pin 117, the insulator 116, and the power supply pin 115 can all be fixed by press-fitting or the like and can be unitized, thereby reducing the number of assembly steps can do.

  Also in this embodiment, the inner diameter of the ground pin 117 and the outer diameter of the power feed pin 115 are determined by the dielectric constant of the insulator 116. However, the smaller the dielectric constant, the smaller the inner diameter of the ground pin 117. In order to arrange in a small space such as a watch, a material having a low dielectric constant is preferable as the insulator 116.

<Modification>
The present invention is not limited to the above-described embodiments, and various modifications as described below are possible, for example. Moreover, the aspect of the deformation | transformation described below can also combine suitably arbitrarily selected 1 or several.

(Modification 1)
In the above-described embodiment, the example in which the present invention is applied to an unbalanced feeding antenna that feeds power to only one antenna has been described. However, the present invention can also be applied to a balanced feeding antenna.

(Modification 2)
In the above-described embodiment, an example in which the present invention is applied to an electric timepiece having a ring-shaped antenna has been described. However, the present invention is not limited to such an example, and a patch antenna, a chip antenna, or a reverse antenna is used. The present invention can be applied to a portable device using GPS, Bluetooth (registered trademark), or the like in which an F antenna or the like needs to be arranged at a position away from the circuit board.

(Modification 3)
In the embodiment described above, an example in which the ground pin is press-fitted and fixed to the ground plate has been described. For example, a ground pin hole is provided in a ground plate receiving member separate from the ground plate, and the ground pin is press-fitted into the ground pin hole of the ground plate receiving member. It may be fixed.

DESCRIPTION OF SYMBOLS 10 ... Electronic timepiece, 11 ... Dial, 12 ... Dial, 30 ... Exterior case, 31 ... Case, 31a ... 庇, 40 ... Dial ring, 110 ... Antenna, 112 ... Antenna pattern, 113 ... Antenna pattern, 113a ... Bottom Conductive portion 113b ... feeding land portion 115 ... feeding pin 116 ... insulator 116a ... step 117, ground pin 117a ... step 117b ... step, 123 ... circuit retainer 123a ... spring 125 ... ground plate 125a ... convex part, 125b ... edge part, 125c ... antenna hook part, 125d ... biasing part, 125e ... biasing part, 127 ... ground pin hole.

Claims (9)

An antenna,
A circuit board;
A feeding pin for electrically connecting the front Symbol antenna the circuit board,
A conductive shield arranged to cover at least a portion of the power supply pin;
An insulator disposed between the power supply pin and the shield;
Equipped with a,
The power supply pin is
A cylindrical metal barrel,
A first terminal disposed inside the trunk, the first terminal being in contact with the conductive portion of the antenna and being in contact with the trunk;
A second terminal disposed inside the body, the second terminal being in contact with the circuit board and in contact with the body;
A spring member disposed between the first terminal and the second terminal inside the body;
Comprising
A portable device characterized by that. A non-conductive ground plane to which the antenna and the circuit board are attached;
The shield is fixed to the ground plane;
The portable device according to claim 1. The ground plate is formed with a fixed portion and an edge portion of the shield,
A step is formed on the outer periphery of the shield,
The shield is positioned by contact between the step of the outer periphery and the edge.
Mobile device according to 請 Motomeko 2 you wherein a. A step is formed on the inner periphery of the shield,
A step is formed on the outer periphery of the insulator,
The insulator is positioned by contact between the step of the outer peripheral portion of the insulator and the step of the inner peripheral portion of the shield.
The portable device according to any one of claims 1 to 3, wherein the portable device is characterized in that: The power supply pin, the shield, and the insulator are formed as an integral power supply member.
The portable device according to any one of claims 1 to 4, wherein the portable device is characterized in that: The feed pin is slidable in any end direction of the feed pin.
The portable device according to claim 5. A circuit holder covering the circuit board;
The circuit retainer electrically connects the shield and the ground of the circuit board.
The portable device according to any one of claims 1 to 6, wherein the portable device is a device. The feed pin performs unbalanced feed to the antenna.
The portable device according to any one of claims 1 to 7, wherein the portable device is characterized in that: The portable device is a wristwatch;
The portable device according to any one of claims 1 to 8, wherein the portable device is a device.

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