JP2013104800A - Sensitivity adjustment device and radio wave communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensitivity adjustment device which can adjust sensitivity of radio wave transmission/reception of an antenna according to intended uses by simple structure, and a radio wave communication apparatus applying the same.SOLUTION: The sensitivity adjustment device comprises a calendar display member 7 in which, on a surface of a ring-shaped display member body, calendar display parts 71 are provided at predetermined intervals along a peripheral line of the display member body, and also a plurality of pairs of a thick wall part 74 as a shielding part for inhibiting the radio waves from penetrating and a thin wall part 75 next to the thick wall part as a releasing part for letting the radio waves pass through are provided corresponding to the calendar display parts 71. The calendar display member 7 is arranged at a position covering an antenna 6, and also changes positions of the shielding parts and the releasing parts in the calendar display member 7 and adjusts a shielding degree of the radio waves to be shielded by the shielding parts by rotating around the ring center by calendar member moving means 78, in order to adjust sensitivity of the antenna 6.

Description

  The present invention relates to a sensitivity adjustment device and a radio communication device to which the sensitivity adjustment device is applied.

In recent years, techniques for transmitting or receiving (communication) various data such as exchanging data by wireless method and synchronizing information between electronic devices such as wristwatches equipped with a wireless communication function have been spreading. is there.
Data transmitted or received by such wireless communication may include a lot of personal information. For this reason, in order to protect personal privacy and the like, it is necessary to transmit or receive data accurately from a specific electronic device to a specific electronic device.

  However, when there are a plurality of electronic devices around the user, there is a possibility that interference with other electronic devices may occur and wireless communication cannot be performed accurately with the target electronic device. In particular, when handling radio waves having a long wavelength such as Bluetooth (registered trademark), the radio waves are strong against obstacles and are not easily cut off, and thus easily interfere with other electronic devices.

  2. Description of the Related Art Conventionally, in a wireless communication system, as a method for appropriately pairing (that is, initial recognition work) between electronic devices that want to communicate while avoiding interference with other electronic devices, electronic devices (electronic devices) that are desired to be paired ) Are placed close to each other, and one electronic device transmits an inquiry signal limited to a power level lower than the standard signal output power level in the wireless communication system, and the other electronic device transmits this inquiry. When a signal is detected, a response signal corresponding to the signal is transmitted. Then, based on the fact that the electronic device is the first electronic device that responds to the inquiry signal, a method of starting point-to-point connection between both electronic devices has been proposed (see, for example, Patent Document 1). ).

  When pairing is performed by such a method, communication can be established only between the target electronic devices while avoiding interference with other electronic devices, and pairing can be performed appropriately.

Special table 2007-536852 gazette

  However, there are various purposes for transmitting or receiving data between electronic devices. For example, when performing communication by bringing electronic devices close to each other as in the case of pairing, for example, the user himself / herself is required. When transmitting or receiving data between electronic devices located at some distance, such as when transmitting or receiving various data between a mobile terminal device worn by a wristwatch and an electronic device such as a wristwatch, or a user In some cases, it may be necessary to perform transmission or reception with an electronic device that is assumed to be located some distance away, such as when searching for the location of an electronic device that has been separated from the hand.

  For this reason, it is required that the sensitivity of radio wave transmission or reception when transmitting or receiving data between electronic devices is appropriately switched according to the purpose, application, situation, and the like.

In this regard, in mobile phones, personal computers, etc., the sensitivity of transmission or reception is switched in a communication-related module such as a receiving circuit.
However, especially in small electronic devices such as wristwatches, there is a limited battery storage space, so it is important to reduce power consumption as much as possible. This method increases the power consumption in communication-related modules. There is a problem with it.
Further, when switching the reception sensitivity in the communication-related module, there is a possibility that the impact resistance performance and the like may be limited due to the complicated internal mechanism of the module and the like.

  The present invention has been made in view of the above circumstances, and adjusts the sensitivity of radio wave transmission or reception by an antenna so as to achieve sensitivity according to the application by a simple mechanism while suppressing power consumption. It is an object of the present invention to provide a sensitivity adjustment device that can perform the same and a radio communication device to which the sensitivity adjustment device is applied.

In order to solve the above-described problem, a sensitivity adjustment device according to the present invention includes:
A sensitivity adjustment device that adjusts the sensitivity of an antenna that transmits or receives a radio signal to / from an external device,
The surface of the display member body formed in an annular shape is provided with a calendar display portion at predetermined intervals along the circumferential direction of the display member body, and a shielding portion that prevents transmission of radio waves and radio waves adjacent thereto A plurality of sets of open portions corresponding to the calendar display portion, and a calendar display member disposed at a position covering the antenna from above,
The calendar display member is rotated around its annular center to change the positions of the shielding part and the opening part of the calendar display member with respect to the antenna, and adjust the shielding degree of the radio wave shielded by the shielding part. A calendar member moving means for adjusting the sensitivity of the antenna;
It is characterized by having.

The radio communication device according to the present invention is
The sensitivity adjustment device according to claim 1 or 2,
An antenna whose radio wave transmission or reception sensitivity is adjusted by the sensitivity adjustment device;
It is characterized by having.

  According to the present invention, the antenna sensitivity is adjusted by rotating the calendar display member and adjusting the shielding degree of the radio wave shielded by the shielding part as a method for adjusting the antenna sensitivity to the sensitivity suitable for the communication mode. The mechanical structure is taken. For this reason, compared to the case of switching the sensitivity of transmission or reception in a communication-related module such as a receiving circuit, it is possible to realize a simplified device configuration, reduction in size and weight, and adjustment of antenna sensitivity. The power consumption can be suppressed.

It is a front view of a wristwatch to which a sensitivity adjustment device in this embodiment is applied. It is the II-II sectional view taken on the line of the wristwatch of FIG. It is a top view which shows the module member in the wristwatch of FIG. It is a top view which shows the sensitivity adjustment apparatus in 1st Embodiment. It is the VV sectional view taken on the line of the calendar display member in FIG. (A) is the top view which showed the positional relationship of a calendar display member and an antenna when the sensitivity of the transmission or reception of the electromagnetic wave by an antenna will be the highest state, (B) is B- in (A). It is B line sectional drawing. (A) is the top view which showed the positional relationship of a calendar display member and an antenna when the sensitivity of the transmission or reception of the electromagnetic wave by an antenna will be in a moderate state, (B) is B in (A) FIG. (A) is the top view which showed the positional relationship of a calendar display member and an antenna when the sensitivity of the transmission or reception of the electromagnetic wave by an antenna will be the lowest state, (B) is B- in (A). It is B line sectional drawing. It is a perspective view which shows the modification of a calendar display member. FIG. 10 is a cross-sectional view showing the positional relationship between the calendar display member and the antenna shown in FIG. 9 when the sensitivity of radio wave transmission or reception by the antenna is highest. FIG. 6 is a cross-sectional view showing the positional relationship between a calendar display member and an antenna when the sensitivity of transmission or reception of radio waves by the antenna is highest when a modification of the calendar display member is applied.

  Hereinafter, a preferred embodiment of a sensitivity adjustment device according to the present invention and a radio communication device including the same will be described with reference to FIGS. 1 to 8. In the following, a case where the sensitivity adjustment device according to the present invention is applied to a wristwatch having a function as a radio communication device will be described, but embodiments to which the present invention can be applied are not limited thereto.

FIG. 1 is a front view of a wristwatch body of a wristwatch according to the present embodiment, and FIG. 2 is a sectional view taken along line II-II in FIG.
The wristwatch 100 according to the present embodiment displays time by rotating the hands 11 (second hand 11a, minute hand 11b, hour hand 11c) by electric drive.

  The wristwatch 100 includes a main body case 1 formed in a hollow short column shape. A band attaching portion 12 to which a watch band (not shown) is attached is attached to both upper and lower end portions (upper and lower end portions in FIG. 1) of the main body case 1, that is, a 12 o'clock side end portion and a 6 o'clock direction end portion of the timepiece. Is formed.

In addition, a plurality of operation buttons 13 are provided on the outer peripheral portion of the main body case 1 for inputting various operation instructions for performing time adjustment instructions, adjustment of transmission or reception sensitivity, and the like.
In the present embodiment, the operation button 13 can switch a plurality of communication modes with different sensitivity of transmission or reception of radio waves by the antenna 6 described later, and functions as a communication mode switching unit.
Specifically, as will be described later, the pairing mode realized with the lowest radio wave transmission or reception sensitivity, the data synchronization mode realized with the standard radio wave transmission or reception sensitivity, the highest radio wave The terminal search mode / thing left behind prevention mode realized by the sensitivity of transmission or reception can be selected and switched by an input operation using the operation buttons 13.

The main body case 1 has an opening on the front side (viewing side of the wristwatch 100, upper side in FIG. 2) and an opening on the back side (lower side in FIG. 2) of the main body case 1. And the windshield member 2 formed with materials, such as transparent glass, is attached to the surface side opening part of the main body case 1 so that the surface side opening part may be obstruct | occluded through the waterproof ring which is not shown in figure.
On the other hand, the back cover member 3 is attached to the back surface side opening of the main body case 1 so as to close the back surface side opening through the waterproof ring 3a. In the present embodiment, the back cover member 3 is formed of a metal material such as stainless steel or titanium.
A ring-shaped bezel member 14 having a flange 14 a that covers the outer peripheral edge of the windshield member 2 from above is fitted from the outside of the main body case 1 into the front surface side opening of the main body case 1.

Inside the main body case 1, a module member 4 formed in a substantially cylindrical shape is disposed. The module member 4 is supported from the back side (lower side in FIG. 2) by the module holding member 5 and fixed so as not to rattle in the main body case 1.
FIG. 3 is a plan view of the module member 4 as viewed from the upper side (the viewing side of the wristwatch 100, the upper side in FIG. 2). In FIG. 3, the corresponding positions of the calendar display member 7 (described later) and the date window 81 (described later) of the dial 8 on the module member 4 are indicated by a two-dot chain line.
The module member 4 is a circuit board on which various electronic components are mounted, such as a timepiece movement (for example, a driving motor or a wheel train mechanism, not shown) that moves the second hand 11a, the minute hand 11b, and the hour hand 11c that are the hands 11 of the wristwatch 100. (Not shown) or the like is incorporated in a housing (not shown) formed of, for example, resin.

As shown in FIGS. 2 and 3, the upper surface of the module member 4 (the surface on the viewing side of the watch, the upper surface in FIG. 2) at a position between about 4 o'clock and 5 o'clock in the wristwatch 100. A recess 41 is formed.
A small antenna 6 having a chip shape or a loop shape, for example, is housed inside the recess 41. The position where the antenna 6 is arranged is not limited to those exemplified here, and may be another position.

The antenna 6 transmits or receives a wireless signal to / from an external device (for example, the external terminal device G, see FIG. 1), and performs communication according to a standard such as Bluetooth (registered trademark). Note that the communication standard of the antenna 6 and the communicable frequency band are not limited to Bluetooth (registered trademark), and those suitable for various communications performed by the wristwatch 100 (that is, those suitable for frequency, etc.) are appropriately applied. The Moreover, the antenna 6 should just be a small thing, and a kind and shape are not specifically limited. Further, as will be described later, in this embodiment, the antenna 6 has a sensitivity of radio wave transmission or reception capable of transmitting or receiving a signal with a device existing within a range of about 5 m at the maximum. Although applied, the sensitivity of radio wave transmission or reception of the antenna 6 is not limited to this, and it is possible to transmit or receive a signal with a device farther away when the sensitivity is maximized. It may be used.
The antenna 6 is electrically connected to a circuit board via a connector (not shown) and the like, and a control circuit (hereinafter referred to as “transmission / reception control circuit unit”) that controls transmission or reception of radio waves (not shown) via this connector. Connected).
In the present embodiment, the antenna 6 and the transmission / reception control circuit unit (not shown) always transmit or receive a radio wave within the range of about 5 m from the antenna 6 in this embodiment. The sensitivity of the antenna 6 is changed by changing the shielded range of the antenna 6 (that is, the degree of shielding of the radio wave entering the antenna 6) by the sensitivity adjusting device 70 (see FIG. 4). The sensitivity of reception is adjusted by the mechanical configuration.

In addition, a radio wave shielding member 42 is disposed inside the concave portion 41 so as to surround the side surface of the antenna 6 along the inner side surface of the concave portion 41. The radio wave shielding member 42 is a magnetic body formed of, for example, a magnetic material such as ferrite or a material in which a magnetic powder is contained in a synthetic resin. The radio wave shielding member 42 absorbs radio waves to be incident on the antenna 6 due to magnetic loss of the magnetic material and prevents transmission of radio waves.
By arranging such a radio wave shielding member 42 so as to surround the side surface of the antenna 6, the transmission or reception direction of the radio wave by the antenna 6 is limited to the vertical direction. Furthermore, in this embodiment, since the back cover member 3 is formed of a metal material as described above, radio waves from the back cover member 3 side are shielded by the back cover member 3, and transmission or reception of radio waves by the antenna 6 is performed. The direction is limited to the upward direction (the viewing side direction, the upward direction in FIG. 2).

On the module member 4, a calendar display member 7 is disposed at a position covering the antenna 6 from above (see FIG. 3).
The calendar display member 7 is provided with a calendar display portion (calendar display portion 71 in FIG. 4) at predetermined intervals along the circumferential direction of the display member main body 7A on the surface of the annular display member main body 7A. In addition, there are a plurality of shielding parts (thick part 74 in FIG. 4) that prevent transmission of radio waves and open parts (thin parts 75 in FIG. 4) that transmit radio waves adjacent to the shielding part corresponding to the calendar display part 71. It is a set. The calendar display member 7 is provided to be rotatable about the annular center of the display member main body 7A. As shown in FIG. 3, in this embodiment, the calendar display member 7 has a shape along the outer peripheral edge of the module member 4.
In the present embodiment, a sensitivity adjustment device 70 that adjusts the sensitivity of radio wave transmission or reception by the antenna 6 by the calendar display member 7 and the calendar member moving means 78 that rotates the calendar display member 7 around its annular center. Is configured.

FIG. 4 is a plan view showing a schematic configuration of the sensitivity adjustment device 70 in the present embodiment.
In the present embodiment, the calendar display member 7 is made of a material that can prevent transmission of radio waves, such as a radio wave absorber that absorbs radio waves. Specifically, for example, a material obtained by molding a magnetic material such as ferrite or a material containing magnetic powder into a predetermined shape is applied. In addition, the material which forms the calendar display member 7 is not limited to what was shown here.
As shown in FIG. 4, in the present embodiment, the calendar display member 7 is formed on the surface of the annular display member main body 7 </ b> A from “1” to “31” used for date display as the calendar display unit 71. The numerals are date wheels arranged at predetermined intervals in the clockwise direction along the circumferential direction of the calendar display member 7.

FIG. 5 is a cross-sectional view taken along line VV of the calendar display member 7 shown in FIG.
In the present embodiment, the calendar display member 7 includes a plurality of shielding portions that prevent transmission of radio waves and open portions that transmit radio waves adjacent thereto, corresponding to the calendar display portion 71 (in this embodiment, a date display portion). Groups (ie 31 groups) are provided.
That is, as shown in FIGS. 4 and 5, the position corresponding to each calendar display portion 71 (date display portion) on the back side of the calendar display member 7 is engraved to form a recess. The portion corresponding to is a thin portion 75 having a smaller thickness in the radio wave transmission direction than the other portions. Further, a portion other than the thin portion 75 adjacent to the thin portion 75 is a thick portion 74 that is thicker in the radio wave transmission direction than the thin portion 75.
In the present embodiment, the thick portion 74 constitutes a shielding portion that prevents transmission of radio waves, and the thin portion 75 constitutes an open portion that allows radio waves to pass therethrough.
In the present embodiment, the thin portion 75 (that is, the concave portion forming the thin portion) is a fan whose central angle is 360/62 degrees or smaller than the annular center of the calendar display member 7. It is formed into a shape. The shape and size of the thin portion 75 are not limited to this.

As shown in FIGS. 4 and 5, a rack (gear) 72 is formed on the inner surface of the display member body 7 </ b> A of the calendar display member 7 along the circumferential direction thereof.
On the module member 4, a calendar wheel train mechanism 76 including a calendar member drive gear 76 a meshing with the rack 72 of the calendar display member 7, and a calendar train train mechanism 76 connected to the calendar train train mechanism 76 are provided. A calendar member moving means 78 including a motor 77 to be driven is provided. The motor 77 is a stepping motor, for example.

When the communication mode is switched by the operation button 13, the calendar member moving unit 78 rotates and moves the calendar display member 7 so that the radio wave transmission or reception sensitivity of the antenna 6 is suitable for the communication mode. It is like that.
Specifically, the calendar member moving means 78 drives the calendar wheel train mechanism 76 by the motor 77 and transmits the power to the calendar display member 7 to rotate the calendar display member 7 (in the present embodiment, counterclockwise). Rotate). Thereby, the position of the thick part 74 which is the shielding part of the calendar display member 7 and the position of the thin part 75 which is the open part are changed, and the shielding degree of the radio wave shielded by the thick part 74 which is the shielding part is adjusted. Thus, the sensitivity of the transmission or reception of the radio wave of the antenna 6 can be adjusted.
Note that the rotation direction of the calendar display member 7 and the configuration of the calendar wheel train mechanism 76 and the motor 77 constituting the calendar member moving means 78 for rotating the calendar display member 7 are not limited to those exemplified here. For example, the calendar member moving means 78 may be configured to be used also as another driving mechanism such as a mechanism for rotating the hands 11 of the wristwatch 100.

  A dial 8 is arranged between the calendar display member 7 and the windshield member 2. A parting member 9 that covers the outer edge of the dial 8 from above is disposed between the dial 8 and the windshield member 2. In the present embodiment, as shown in FIG. 1, the parting member 9 is provided with a time character 91 that functions as a time display of the wristwatch 100 along its circumferential direction.

As shown in FIG. 1, a shaft member 10 penetrates from the module member 4 side in the approximate center of the dial plate 8, and the shaft member 10 has a second hand 11 a, a minute hand 11 b, which are pointers 11 of the wristwatch 100. Each hour hand 11c is rotatably supported. In addition to the analog dial 8, for example, a liquid crystal display for displaying numbers, letters, etc. in a digital manner may be provided between the calendar display member 7 and the windshield member 2.
In the present embodiment, the position on the dial 8 corresponding to the antenna 6, that is, between 4 o'clock and 5 o'clock in the wristwatch 100 (the time character 91 at 4 o'clock and the time character 91 at 5 o'clock in FIG. 1). In between, a date window portion 81 for exposing and displaying the calendar display portion 71 of the calendar display member 7 is provided.

6 (A) and 6 (B) show the positional relationship between the calendar display member and the antenna when the sensitivity of transmission or reception of radio waves by the antenna is the highest, and FIG. ) And FIG. 7B show the positional relationship between the calendar display member and the antenna when the sensitivity of transmission or reception of radio waves by the antenna is medium, and FIG. 8A and FIG. 8 (B) shows the positional relationship between the calendar display member and the antenna when the sensitivity of radio wave transmission or reception by the antenna is lowest.
In FIG. 6A, FIG. 7A, and FIG. 8A, the date window portion 81 of the dial 8 is indicated by a thick line, and the positions of the antenna 6 and the thin portion 75 are indicated by broken lines. In the transmission direction of the radio wave, a portion that overlaps with the antenna 6 is shaded in a lattice shape.

  As shown in FIGS. 6A and 6B, when the calendar display portion 71 is displayed on the date window portion 81 of the dial 8, the entire thin portion 75 of the calendar display member 7 is the antenna. 6 is disposed at a position overlapping with 6, the shielding degree of the radio wave shielded by the thick portion 74 which is a shielding portion is reduced. Thereby, the sensitivity of the transmission or reception of the radio wave of the antenna 6 becomes the highest. In the present embodiment, particularly when the communication mode is not switched by the operation button 13, the calendar display unit 71 (for example, the current date is “1 day”) which is a date display indicating the current date in the date window 81. In this case, as shown in FIG. 6A, “1”) is displayed, and the radio wave transmission or reception sensitivity of the antenna 6 is kept at the highest level.

  On the other hand, when it is desired to set the sensitivity of transmission or reception of the radio wave of the antenna 6 to a medium state, the calendar member moving means 78 is operated to cause the antenna 6 to operate as shown in FIGS. 7 (A) and 7 (B). Then, the calendar display member 7 is moved to a position where the calendar display portion 71 is displayed with a slight shift from the date window portion 81 of the dial 8. As a result, almost half of the thin portion 75 of the calendar display member 7 is arranged at a position overlapping the antenna 6, and about half of the antenna 6 is covered with the thick portion 74. As a result, the shielding degree of the radio wave shielded by the thick part 74 which is the shielding part becomes larger than that in the state shown in FIGS. 6A and 6B, and the radio wave transmission or reception of the antenna 6 is performed. Sensitivity is in a moderate state.

  Further, when it is desired to make the antenna 6 transmit or receive the lowest sensitivity, by operating the calendar member moving means 78, as shown in FIG. 8A and FIG. The calendar display member 7 is moved to a position where 71 is hardly exposed from the date window portion 81 of the dial 8. As a result, the thick portion 74 of the calendar display member 7 overlaps the entire upper portion of the antenna 6. For this reason, the shielding degree of the radio wave shielded by the thick part 74 as the shielding part becomes the largest, and the sensitivity of the transmission or reception of the radio wave of the antenna 6 becomes the lowest.

  In addition, the wristwatch 100 includes, for example, a control unit configured by a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and a transmission / reception control circuit unit that controls transmission or reception of radio waves. , A time measuring circuit section for performing time correction, an oscillation circuit section, a pointer driving circuit section for driving the pointer 11 and the like (all not shown). Since these are the same as those provided in a general wristwatch, illustration and description thereof are omitted.

  Next, the operation of the sensitivity adjustment device 70 and the wristwatch 100 that is a radio communication device according to the present embodiment will be described.

In the present embodiment, as described above, the wristwatch 100 adjusts the shielding degree of the radio wave shielded by the thick part 74 that is the shielding part by the sensitivity adjustment device 70, thereby transmitting or receiving the radio wave of the antenna 6. The sensitivity can be adjusted.
That is, the wristwatch 100 has a plurality of communication modes realized under different radio wave transmission or reception sensitivities (“pairing mode”, “data synchronization mode”, “terminal search mode / lost item prevention mode” described later in this embodiment). ), And the sensitivity adjustment device 70 sets the shielding degree of the radio wave shielded by the thick part 74 that is the shielding part so that the radio wave transmission or reception sensitivity suitable for each communication mode is obtained. adjust.
Note that the type of communication mode is not limited to this. Only one of “data synchronization mode” and “terminal search mode / thing left behind prevention mode” may be provided, or a communication mode other than these three communication modes may be realized.

  Among these, in the pairing mode, for example, the user establishes a new pairing between the wristwatch 100 and a new external terminal device G (for example, a friend's terminal device) (that is, the terminal devices are associated with each other). This is a communication mode for making data ready to be transmitted or received. For example, when pairing is performed between the wristwatch 100 and a friend's mobile phone, which is a new terminal device G, an inquiry signal is transmitted from the wristwatch 100 to the terminal device G to be paired, and the destination terminal device When a response signal to the inquiry signal is transmitted from G to the wristwatch 100 and the antenna 6 of the wristwatch 100 receives the response signal and sends it to the control unit, pairing is established between the wristwatch 100 and the terminal device G. .

When performing pairing, the watch 100 and the terminal device G are in contact with each other or close to each other so that an unexpected pairing may not be established with other terminal devices existing in the vicinity. It is preferable to adjust so that the sensitivity of radio wave transmission or reception of the antenna 6 is lowered to the extent that radio wave transmission or reception is possible.
For this reason, in the present embodiment, when an instruction to select the pairing mode is input from the operation button 13 or the like and the communication mode for performing communication in the pairing mode is entered, the motor 77 of the calendar member moving unit 78 operates. As a result, the gears constituting the calendar wheel train mechanism 76 are sequentially rotated, and the calendar member driving gear 76a is meshed with the rack 72 of the calendar display member 7 and rotated. As a result, a position where the calendar display portion 71 is hardly exposed from the date window portion 81 of the dial 8, that is, an intermediate position between the two calendar display portions 71 (“1” and “2” in FIG. 8A). The calendar display member 7 rotates counterclockwise to a position where it is arranged at the center of the date window portion 81. As a result, the shielding degree of the radio wave shielded by the thick part 74 which is the shielding part is maximized, and the radio wave transmission or reception sensitivity of the antenna 6 is the lowest sensitivity suitable for the pairing mode.
In this state, when the user contacts the terminal device to be paired with the wristwatch 100 or brings it close to a distance of about 10 cm, an inquiry signal for pairing (for example, an individual identification number of the wristwatch 100) from the antenna 6 of the wristwatch 100. And the terminal device G within a distance that can receive the inquiry signal receives the signal. The terminal device G that has received the inquiry signal returns a response signal (for example, a signal including the individual identification number of the terminal device) to the wristwatch 100. When the antenna 6 of the wristwatch 100 receives this response signal, the response signal is controlled. The control unit registers the terminal device G as a terminal device that can transmit or receive data to or from the wristwatch 100 thereafter. Thus, pairing (initial registration work between terminal devices) is completed.

Note that it is preferable to notify the user whether or not pairing has been established by blinking a light (not shown), an alarm sound, or the like.
Further, in the state where the sensitivity of transmission or reception of the radio wave of the antenna 6 is the lowest (that is, the state where the shielding degree of the radio wave shielded by the thick part 74 which is the shielding part is the highest), it is appropriate between the terminal device. When the pairing cannot be established (that is, when a display or warning indicating that the pairing is not established), the user further operates the operation button 13 to The calendar member moving means 78 rotates and moves the calendar display member 7 from the 8 date window portion 81 to the position where the calendar display portion 71 is exposed, so that the thin portion 75 which is the open portion is positioned so as to cover the upper portion of the antenna 6. You may make it try pairing again after adjusting to. Further, when the pairing is not established, the calendar member moving means 78 may be automatically operated to rotate the calendar display member 7 even when there is no operation by the operation button 13 or the like. In this case, for example, the calendar display member 7 is rotated until the pairing is established, and the shielding degree of the radio wave shielded by the thick portion 74 is gradually decreased.

  On the other hand, the data synchronization mode is, for example, a terminal device that has already been paired with the wristwatch 100, and the terminal device G or the like worn by the user (for example, possessed by the user). In a communication mode that assumes synchronization of data between a mobile phone (not shown) and a terminal device located at a relatively short distance of the wristwatch 100 (for example, a distance of about 1 to 2 m from the antenna 6). is there.

In the present embodiment, when an instruction to select the data synchronization mode is input from the operation button 13 or the like and the communication mode is to perform communication in the data synchronization mode, the calendar 77 is operated by the operation of the motor 77 of the calendar member moving unit 78. The gears constituting the train wheel train mechanism 76 rotate sequentially, and the calendar member drive gear 76a meshes with the rack 72 of the calendar display member 7 and rotates. As a result, the calendar display member 71 is moved up to a position where the calendar display portion 71 (“1” in FIG. 7A) is slightly shifted from the date window portion 81 of the dial 8. Rotate clockwise. As a result, almost half of the thin portion 75 that is the open portion is arranged at a position where it overlaps with the antenna 6, and about half of the antenna 6 is covered by the thick portion 74 that is the shielding portion, and the shielding degree of radio waves becomes medium, The sensitivity of radio wave transmission or reception of the antenna 6 is a moderate sensitivity suitable for the data synchronization mode.
As a result, the wristwatch 100 is in a state in which the antenna 6 can transmit or receive radio waves to / from the terminal device at a distance slightly away. For example, data can be transmitted to or from the mobile phone worn by the user. By transmitting or receiving the data, the mutual data can be synchronized.

  In addition, the terminal search mode is a communication mode that assumes a case where the user searches for a place such as a terminal device of a self or a friend who has been paired with the wristwatch 100, for example. This is a communication mode assuming that a warning is issued by a buzzer or the like when a predetermined distance (for example, about 5 m) or more is left from the terminal device that has been paired with the wristwatch 100.

In the present embodiment, when an instruction for selecting the terminal search mode or the left-behind item prevention mode is input from the operation button 13 or the like and the communication mode for performing communication in the terminal search mode or the left-behind item prevention mode is entered, the date window of the dial 8 is displayed. The normal display state in which the calendar display portion 71 (“1” in FIG. 6A) is displayed in the portion 81 is maintained.
In this state, since the entire thin portion 75 of the calendar display member 7 is disposed at a position overlapping the antenna 6, the degree of shielding of radio waves shielded by the thick portion 74, which is a shielding portion, is minimized. Thereby, the sensitivity of the transmission or reception of the radio wave of the antenna 6 becomes the highest sensitivity suitable for the terminal search mode or the forgotten object prevention mode.
Thereby, in the terminal search mode, for example, a signal requesting a response is transmitted from the antenna 6 of the wristwatch 100 to the paired terminal device G within a range of about 5 m from the wristwatch 100, and the terminal device G When this signal is received and a response signal is transmitted to the wristwatch 100, the fact is notified to the user by a sound such as a buzzer or a blinking light. Further, for example, in the lost-item prevention mode, a signal requesting a response is transmitted from the antenna 6 of the wristwatch 100 to the paired terminal device G, and the terminal device G receives this signal and sends a response signal to the wristwatch 100. Send to. When the response signal from the terminal device G cannot be received, the control unit of the wristwatch 100 causes the terminal device G to have a predetermined distance (in this embodiment, a range in which the antenna 6 can transmit or receive radio waves 5 m or more). It is determined that the user is away from the user, and the fact is notified to the user by a sound such as a buzzer or a blinking light.

As described above, according to the present embodiment, a plurality of communication modes (for example, a pairing mode, a data synchronization mode, a terminal search mode / a left-behind item prevention mode) realized under different radio wave transmission or reception sensitivities are realized. Since it is possible, various communications according to a user's purpose and use can be performed.
In the case of the wristwatch 100, a reduction in size and weight is required, and it is difficult to secure a space for accommodating a large battery. However, the wristwatch 100 according to the present embodiment includes the calendar display member 7 and the calendar member moving means 78. As a method for adjusting the sensitivity of radio wave transmission or reception of the antenna 6 to a sensitivity suitable for these communication modes, the calendar display member 7 is rotated to turn the thick-walled portion as a shielding portion. Since the mechanical configuration of adjusting the shielding degree of the radio wave shielded by 74 is adopted, the antenna 6 is compared with the case where the radio wave transmission or reception sensitivity is switched in a communication-related module such as a receiving circuit. It is possible to reduce power consumption required for adjusting the sensitivity of transmission or reception of radio waves.
And since it is not necessary to provide a large sized battery etc. by being able to suppress power consumption, the apparatus can be reduced in size and weight.
In addition, since the calendar display member 7 having the thick part 74 that is a shielding part and the thin part 75 that is an open part can be rotated, the radio wave transmission or reception sensitivity of the antenna 6 can be adjusted. Sensitivity adjustment suitable for the communication mode can be performed without providing a member for adjusting the sensitivity of radio wave transmission or reception, and simplification of the device configuration and reduction in size and weight can be realized.
Further, in the present embodiment, a plurality of sets of thick portions 74 that are shielding portions that prevent the transmission of radio waves and thin portions 75 that are open portions that transmit radio waves adjacent thereto are provided corresponding to each calendar display portion 71. It has been. For this reason, when adjusting the transmission / reception sensitivity of the radio wave of the antenna 6, it is sufficient to move the calendar display member 7 by half the width of the calendar display portion 71, and it is necessary to rotate the calendar display member 7 significantly. Absent. Thereby, the sensitivity of transmission or reception of the radio wave of the antenna 6 can be quickly adjusted to a desired sensitivity.
In the present embodiment, a plurality of thin portions 75 that are open portions that transmit radio waves are provided corresponding to the positions of the calendar display portions 71, and the current date is displayed from the date window portion 81 of the dial 8. When the corresponding calendar display unit 71 is exposed, the radio wave transmission or reception sensitivity of the antenna 6 is the best. For this reason, in the normal display state in which the date is displayed, a state in which radio waves can be freely transmitted or received with the external terminal device G is maintained.
In this way, when the calendar display 71 corresponding to the current date is exposed from the date window 81 of the dial 8, the radio wave transmission or reception sensitivity of the antenna 6 is the best. The sensitivity of radio wave transmission or reception decreases as the calendar display unit 71 deviates from the date window unit 81. For this reason, the user can easily confirm the state of sensitivity of transmission or reception of the radio wave of the antenna 6 by visual observation.

  Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in this embodiment, the calendar display member 7 is formed of a radio wave shield made of a magnetic material or the like, and is carved into a substantially trapezoidal shape as an open part, and has a thin part 75 that is thinner in the radio wave transmission direction than other parts. The thick portion 74 serving as the shielding portion and the thin portion 75 serving as the opening portion are provided in the form and form of the thick portion 74 serving as the shielding portion. Is not limited to this.
For example, as shown in FIGS. 9 and 10, on the back side of the calendar display member 200 having a rack 272 along the inner peripheral surface, corresponding to the calendar display unit 271, substantially corresponds to the center of each calendar display unit 271. It is also possible to provide a plurality of inclined portions where the position to be thinned is the thinnest and the cross sectional view is substantially serrated. In this case, the deepest engraved portion of the inclined surface (that is, the portion where the thickness in the radio wave transmission direction is the thinnest) becomes the thin portion 275 as the open portion, and the apex portion of the sawtooth is the thick portion as the shielding portion. 274.
Also in this case, when the entire calendar display portion 271 is exposed from the date window portion 81 of the dial 8, the upper portion of the antenna 6 is covered with the thin portion 275, so that transmission or reception of radio waves from the antenna 6 is performed. As the position of the calendar display portion 271 is shifted from the date window portion 81, the upper portion of the antenna 6 is widely covered with the thick portion 274, so that the sensitivity of radio wave transmission or reception of the antenna 6 gradually increases. It goes down.

In addition, when a plurality of inclined portions are provided on the back surface side of the calendar display member, the shape of the inclined portion in a sectional view is as shown in FIGS. 9 and 10, and the inclination angle of the inclined portion on one side of the thin-walled portion 275 is the other. It is not limited to a sawtooth shape having an acute angle.
For example, as shown in FIG. 11, on the back side of the calendar display member 300, the position corresponding to the approximate center of each calendar display part 371 is the thinnest, and the intermediate position between the calendar display parts 371 is the thickest. Such mountain-shaped irregularities may be formed.
In this case, a portion corresponding to substantially the center of each calendar display portion 371 (that is, a portion having the smallest thickness in the radio wave transmission direction) becomes a thin portion 375 as an open portion, and each calendar display portion 371 is connected to each other. A portion corresponding to the intermediate position becomes a thick portion 374 as a shielding portion.
Also in this case, since the upper part of the antenna 6 is covered with the thin part 375 when the entire calendar display part 371 is exposed and displayed from the date window part 81 of the dial 8, transmission or reception of radio waves from the antenna 6 is performed. As the position of the calendar display portion 371 is shifted from the date window portion 81, the upper portion of the antenna 6 is widely covered with the thick portion 374, so that the sensitivity of transmission or reception of the radio wave of the antenna 6 gradually increases. It goes down.

  Moreover, when providing an inclined part as shown to FIGS. 9-11, you may form a stepped step part in an inclined surface.

  When the inclined portion as shown in FIGS. 9 to 11 is provided and the portion where the thickness in the radio wave transmission direction is the thinnest is the thin portion as the open portion, the sensitivity of the transmission or reception of the radio wave of the antenna 6 is improved. It becomes possible to change the degree more smoothly and gradually.

Further, in the present embodiment, the calendar display member 7 itself is composed of a radio wave shield formed of a magnetic material or the like, and the thin part where the thickness in the radio wave transmission direction is the thinnest is the open part, and the other thick parts Although the case where a part is made into a shielding part was demonstrated as an example, the structure which shields an electromagnetic wave with the calendar display member 7 is not limited to this.
For example, the calendar display member itself may be formed of a material such as a resin that transmits radio waves, and a radio wave shield such as a magnetic sheet formed of a magnetic material may be attached to a portion other than the position corresponding to the calendar display portion. .
In this case, the part to which the radio wave shield is attached serves as a shielding part that prevents transmission of radio waves, and the part to which the radio wave shield is not attached serves as an open part that transmits radio waves.

  In this embodiment, the radio wave shielding member 42 and the calendar display member 7 disposed around the antenna 6 are made of a magnetic material, and the radio wave is prevented from being transmitted by absorbing the radio wave due to the magnetic loss of the magnetic material. As described above, the radio wave shielding member 42 and the calendar display member only need to be capable of preventing the transmission of radio waves, and the configuration thereof is not limited to that which absorbs radio waves due to magnetic loss.

  Further, in the present embodiment, a plurality of sets of shielding portions (thick portions 74) that prevent transmission of radio waves and open portions (thin portions 75) that transmit adjacent radio waves (thin portions 75) corresponding to each calendar display portion 71 ( In other words, 31 sets) are provided as an example, but the shielding part and the opening part may not be provided one by one corresponding to all the calendar display parts 71. For example, an open portion may be provided corresponding to the calendar display portions 71 of “5”, “10”, “15”, “20”, “25”, and “30”, and a shield portion may be provided between the open portion and the open portion. In this case, when the calendar display portion 71 displayed on the date window portion 81 is “5”, “10”, “15”, “20”, “25”, “30”, the sensitivity of the transmission or reception of the radio wave of the antenna 6 is the best. As the calendar display unit 71 is deviated from this state, it is possible to adjust so that the sensitivity of the transmission or reception of the radio wave of the antenna 6 gradually decreases.

Further, in the present embodiment, the case where the calendar display member 7 is a date indicator having the date display from “1” to “31” as the calendar display unit 71 has been described, but the calendar display member is not limited to the date indicator.
For example, a calendar display member for displaying a day of the week having a day display unit from “Monday” to “Sunday” as the calendar display unit may be used. In this case, seven sets of shielding parts (for example, thick parts) and open parts (for example, thin parts) are provided corresponding to each calendar display part.

  In the present embodiment, the calendar display member 7 is formed in an annular shape along the outer peripheral edge of the module member 4, and the annular center is substantially coincident with the shaft member 10 of the wristwatch 100. The shape and size of the member 7 are not limited to this. For example, the calendar display member may be an annular member having a small diameter of about a quarter of the diameter of the module member 4. In this case, the annular center of the calendar display member may not coincide with the shaft member 10 of the wristwatch 100. Also in this case, the calendar display member is disposed at a position covering the upper portion of the antenna 6.

Further, in the present embodiment, the case where the calendar member moving means 78 for rotating the calendar display member 7 is constituted by the calendar wheel train mechanism 76 and the motor 77 is described as an example. The configuration is not limited to this.
For example, when a wristwatch is equipped with a crown or the like, a drive transmission mechanism (gear mechanism or the like) that transmits the rotation of the shaft of the crown or the like to a calendar display member is provided, and the calendar member is moved by the crown and the drive transmission mechanism (gear mechanism or the like). Means may be configured.
In this case, when adjusting the transmission / reception sensitivity of the radio wave of the antenna 6, the calendar display member is manually set to have a desired radio wave transmission / reception sensitivity by rotating the crown or the like, for example. Rotate to the position.

Further, in the present embodiment, a case where the sensitivity of the transmission or reception of the antenna 6 is adjusted in three stages of “pairing mode”, “data synchronization mode”, and “terminal search mode / thing left behind prevention mode” will be described as an example. However, the adjustment of the sensitivity of transmission or reception of the radio wave of the antenna 6 is not limited to three stages.
For example, when performing communication in the “pairing mode”, the shielding unit is positioned on the antenna 6, and when performing communication in the “data synchronization mode” or “terminal search mode / thing leftover prevention mode”, the antenna 6 Two-stage adjustment may be performed on the sensitivity of transmission or reception of the radio wave of the antenna 6 such that the open portion is positioned above.
Further, for example, by adjusting the positional relationship between the shielding unit and the antenna 6 in a stepwise manner, the sensitivity of radio wave transmission or reception of the antenna 6 may be adjusted in four or more steps. In this case, when the user performs communication in the “pairing mode”, if the pairing is not established in a state where the entire antenna 6 is shielded, the radio wave of the antenna 6 is not obtained until the pairing is established. The sensitivity of transmission or reception can be increased step by step.

Moreover, in each said embodiment, although the case where the main body case 1 was formed with the material which can permeate | transmit radio waves, such as resin, was taken as an example, the material which forms the main body case 1 is not limited to this. For example, the main body case 1 may be formed of a metal material such as stainless steel or titanium.
In this case, intrusion of radio waves is inhibited not only from the back surface of the wristwatch 100 provided with the back cover member 3 but also from the side surface of the wristwatch 100, and the direction in which the radio waves enter the antenna 6 is the front side of the wristwatch 100 (in FIG. 2). Upper side). For this reason, in this case, it is not necessary to arrange the radio wave shielding member 42 around the antenna 6.
Moreover, in each said embodiment, although the case where the back cover member 3 was formed, for example with metal materials, such as stainless steel and titanium, was taken as an example, the material which forms the back cover member 3 is not limited to this. For example, the back cover member 3 may be formed of a material capable of transmitting radio waves such as resin.
In this case, since radio waves also enter from the back surface of the wristwatch 100 provided with the back cover member 3, the radio wave shielding member is disposed not only around the antenna 6 but also below the antenna 6 (that is, on the back surface side of the wristwatch 100). It is preferable to do.

  In this embodiment, the case where the wristwatch 100 is an analog wristwatch provided with the hands 11 has been described. However, the wristwatch is not limited to an analog wristwatch. For example, it may be a wristwatch in which a liquid crystal display unit composed of a liquid crystal panel or the like is arranged on a part of an analog dial and the like and includes both hands and a liquid crystal display unit.

Although several embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof. .
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
A sensitivity adjustment device that adjusts the sensitivity of an antenna that transmits or receives a radio signal to / from an external device,
The surface of the display member body formed in an annular shape is provided with a calendar display portion at predetermined intervals along the circumferential direction of the display member body, and a shielding portion that prevents transmission of radio waves and radio waves adjacent thereto A plurality of sets of open portions corresponding to the calendar display portion, and a calendar display member disposed at a position covering the antenna from above,
The calendar display member is rotated around its annular center to change the positions of the shielding part and the opening part of the calendar display member with respect to the antenna, and adjust the shielding degree of the radio wave shielded by the shielding part. A calendar member moving means for adjusting the sensitivity of the antenna;
A sensitivity adjusting device comprising:
<Claim 2>
The open part is a thin part having a small thickness in the radio wave transmission direction,
The sensitivity adjustment apparatus according to claim 1, wherein the shielding part and the opening part are configured to change a shielding degree of the radio wave by changing a thickness in a radio wave transmission direction.
<Claim 3>
The sensitivity adjustment device according to claim 1 or 2,
An antenna whose radio wave transmission or reception sensitivity is adjusted by the sensitivity adjustment device;
A radio communication device characterized by comprising:

DESCRIPTION OF SYMBOLS 1 Main body case 4 Module member 6 Antenna 7 Calendar display member 8 Dial 13 Operation button 42 Radio wave shielding member 70 Sensitivity adjustment device 71 Calendar display part 72 Rack 74 Thick part 75 Thin part 76 Calendar train wheel mechanism 76a Calendar member drive gear 77 Motor 78 Calendar member moving means 81 Date window 100 Wristwatch G Terminal device

Claims (3)

A sensitivity adjustment device that adjusts the sensitivity of an antenna that transmits or receives a radio signal to / from an external device,
The surface of the display member body formed in an annular shape is provided with a calendar display portion at predetermined intervals along the circumferential direction of the display member body, and a shielding portion that prevents transmission of radio waves and radio waves adjacent thereto A plurality of sets of open portions corresponding to the calendar display portion, and a calendar display member disposed at a position covering the antenna from above,
The calendar display member is rotated around its annular center to change the positions of the shielding part and the opening part of the calendar display member with respect to the antenna, and adjust the shielding degree of the radio wave shielded by the shielding part. A calendar member moving means for adjusting the sensitivity of the antenna;
A sensitivity adjusting device comprising: The open part is a thin part having a small thickness in the radio wave transmission direction,
The sensitivity adjustment apparatus according to claim 1, wherein the shielding part and the opening part are configured to change a shielding degree of the radio wave by changing a thickness in a radio wave transmission direction. The sensitivity adjustment device according to claim 1 or 2,
An antenna whose radio wave transmission or reception sensitivity is adjusted by the sensitivity adjustment device;
A radio communication device characterized by comprising:

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