JP5811619B2 - Sensitivity adjusting device and wristwatch - Google Patents

Description

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

In recent years, techniques for transmitting and receiving (communication) various types of data such as exchanging data by wireless methods and synchronizing information between electronic devices such as wristwatches having a wireless communication function have been spreading.
Data transmitted and received by such wireless communication may include a lot of personal information. For this reason, in order to protect personal privacy and the like, data transmission / reception needs to be accurately performed 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 and receiving data between electronic devices. In addition to the case where communication is performed as close as the electronic devices are brought into contact with each other as in the case of pairing, for example, the user himself / herself wears it. When transmitting / receiving data between electronic devices located at a slightly distant position, such as when transmitting / receiving various data between a portable terminal device and an electronic device such as a wristwatch, or when the user moves away from the hand In some cases, it is necessary to perform transmission / reception with an electronic device that is assumed to be located some distance away, such as when searching for the location of the electronic device.

  For this reason, the transmission / reception sensitivity of radio waves when transmitting / receiving data between electronic devices is required to be switched as appropriate according to the purpose, application, situation, and the like.

In this regard, in mobile phones, personal computers, and the like, transmission / reception sensitivity is switched in a communication-related module such as a receiving circuit.
However, when the transmission / reception sensitivity is switched in the communication-related module, there is a problem that the control configuration of the communication-related module becomes complicated.

  The present invention has been made in view of the circumstances as described above, and a sensitivity adjustment device capable of adjusting the transmission / reception sensitivity of an antenna so that the sensitivity according to the application is achieved by a simple mechanism, and a wristwatch to which the sensitivity adjustment device is applied. Is intended to provide.

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 radio wave transmission / reception sensitivity of an antenna capable of transmitting and receiving radio signals to and from an external device,
An outer case for housing the antenna;
It is formed in an annular shape along the outer peripheral edge of the outer case, and is disposed on the outer case so as to cover the antenna, and is fitted to the outer case from the outside and rotated around the center of the ring A rotating bezel provided as possible,
With
The rotating bezel includes a shielding part formed by applying a radio wave shielding material that prevents transmission of radio waves, a notch part or a hole part that is an open part that transmits radio waves to a part of its circumferential direction, and the opening. And an index portion indicating the position of the portion, and the shielded range of the antenna shielded by the shielding portion is adjusted.

  According to the present invention, as a technique for adjusting the radio wave transmission / reception sensitivity of the antenna to a sensitivity suitable for the communication mode, a mechanical configuration is adopted in which the shielded range of the antenna covered by the shielding portion is adjusted by rotating the rotating bezel. Therefore, as compared with the case where the transmission / reception sensitivity is switched in the communication-related module such as the reception circuit, there is an effect that it is possible to suppress the power consumption required for adjusting the radio wave transmission / reception sensitivity of the antenna.

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 principal part sectional drawing which expanded the 6 o'clock position periphery in the wristwatch of FIG. It is a perspective view which shows the rotation bezel in this embodiment. It is the perspective view which showed the positional relationship of a rotating bezel and an antenna when the transmission / reception sensitivity of an antenna will be in a low state. It is the perspective view which showed the positional relationship of a rotating bezel and an antenna when the transmission / reception sensitivity of an antenna will be in a high state. It is a perspective view which shows one modification of a rotation bezel. FIG. 8 is a perspective view showing a positional relationship between the rotating bezel and the antenna shown in FIG. 7 when the antenna transmission / reception sensitivity is low. FIG. 8 is a perspective view showing a positional relationship between the rotating bezel and the antenna shown in FIG. 7 when the transmission / reception sensitivity of the antenna is high.

  Hereinafter, with reference to FIGS. 1 to 6, a preferred embodiment of a sensitivity adjustment device and a wristwatch including the sensitivity adjustment device according to the present invention will be described. 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. However, embodiments to which the sensitivity adjustment device can be applied are not limited thereto.

1 is a front view of the wristwatch according to the present embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is an enlarged view of the wristwatch in FIG. It is principal part sectional drawing.
The wristwatch 100 according to the present embodiment displays time by rotating a pointer (second hand, minute hand, hour hand) (not shown) by electrical driving. In FIG. 1 to FIG. 3, illustration of the pointer and the like is omitted.

  The wristwatch 100 includes an outer case 1 formed in a hollow short column shape. In the present embodiment, the outer case 1 is formed of a metal material such as stainless steel or titanium. In addition, the exterior case 1 is not limited to what is formed with a metal material, For example, it may be formed with resin etc.

A band attaching portion 11 to which a watch band (not shown) is attached is formed on the outer surface of the outer case 1 on the 12 o'clock side and 6 o'clock side of the watch (that is, both upper and lower ends in FIG. 1). ing. In addition, a crown, operation buttons, and the like (not shown) are provided on the side of the outer case 1.
Further, the exterior case 1 has an opening on the back side (lower side in FIG. 2), and the back cover member 3 is inserted into the opening on the back side of the exterior case 1 through a waterproof ring or the like (not shown). And attached so as to close the opening on the back side.

The outer peripheral portion of the upper part of the outer case 1 (the surface side in the wristwatch 100, the upper side in FIG. 2) is a bezel mounting portion 12 that is formed in a flat plate shape substantially horizontally by the same width as the rotation bezel 7 described later. ing.
A radio wave transmitting portion 13 that is capable of transmitting radio waves is formed at a position of the wristwatch 100 in the 6 o'clock direction, which is a part of the bezel mounting portion 12. The radio wave transmitting portion 13 is formed by, for example, notching a part of the outer case 1 formed of a metal material and fitting a member formed of a material that transmits radio waves such as resin or glass into the notched portion. Is formed. The configuration of the radio wave transmitting portion 13 is not limited to this, and may be formed by engraving a part of the outer case 1 so that the radio wave transmitting portion 13 is thin enough to transmit radio waves. In addition, when the exterior case 1 is formed of a material that can transmit radio waves, such as resin, it is not necessary to provide the radio wave transmission part 13.

A standing portion 14 that protrudes to the surface side of the wristwatch 100 (that is, the upper side in FIG. 2) is formed at the upper portion of the outer case 1 and inside the bezel mounting portion 12. The upper portion of the upright portion 14 is opened to form an opening on the surface side (upper side in FIG. 2) of the exterior case 1.
A windshield member 2 formed of a material such as transparent glass is attached to the opening on the surface side of the exterior case 1 so as to close the opening on the surface side through a waterproof ring or the like (not shown).
In addition, on the outer peripheral surface of the standing portion 14, a flange portion 15 that fits into a groove portion 73 of the rotating bezel 7 described later is formed along the circumferential direction.

  A module 4 formed in a substantially cylindrical shape is disposed inside the outer case 1. The module 4 includes a timepiece movement (for example, a driving motor, a gear train mechanism, etc., not shown) for moving the hands (not shown) of the wristwatch 100, a circuit board (not shown) on which various electronic components are mounted, and the like. For example, it is incorporated in a housing (not shown) formed of resin or the like.

As shown in FIGS. 2 and 3, a small chip-shaped or loop-shaped antenna 5 is provided in the exterior case 1 at a position (lower position in FIG. 1) corresponding to the wristwatch at approximately 6 o'clock. Is stored. In the present embodiment, the antenna 5 is disposed so as to be positioned below the radio wave transmitting portion 13 provided in the bezel mounting portion 12 in the outer case 1.
The antenna 5 is fixed, for example, on the upper side of the module 4 (the surface side in the wristwatch 100) by adhesive fixing or the like. The antenna 5 may be attached to the surface of the module 4 or embedded in the module 4.
In addition, the position where the antenna 5 is arranged is not limited to the one illustrated here, and may be another position. When the antenna 5 is disposed at another position, the radio wave transmitting unit 13 is provided at a position corresponding to the antenna 5 in the bezel mounting unit 12.

The antenna 5 can transmit and receive wireless signals to and from an external device, and performs communication according to a standard such as Bluetooth (registered trademark). Note that the communication standard of the antenna 5 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 5 should just be a small thing, and a kind and shape are not specifically limited. As will be described later, in this embodiment, the antenna 5 has a radio wave transmission / reception sensitivity capable of transmitting / receiving a signal to / from a device within a range of about 5 m at the maximum. The radio wave transmission / reception sensitivity of the antenna 5 is not limited to this, and an antenna that can transmit / receive a signal to / from a further distant device when the sensitivity is maximized may be used.
The antenna 5 is electrically connected to a circuit board via a connector or the like (not shown), and is connected to a radio wave transmission / reception control circuit (not shown) via the connector.
In the present embodiment, the antenna 5 and the transmission / reception control circuit itself (not shown) always maintain the maximum radio wave transmission / reception sensitivity (for example, in this embodiment, the radio wave transmission / reception sensitivity capable of transmitting / receiving radio waves within a range of about 5 m from the antenna 5). The radio wave transmission / reception sensitivity is adjusted by the mechanical configuration by changing the shielded range of the antenna 5 by the sensitivity adjusting device 10 (see FIG. 2).

  A dial 6 is disposed in the outer case 1 between the windshield member 2 and the module 4. In addition to the analog dial 6, a liquid crystal display unit or the like that displays numbers and letters in a digital manner may be provided between the windshield member 2 and the module 4.

On the bezel mounting portion 12 of the outer case 1, a rotating bezel 7 formed in an annular shape (ring shape) is provided along the outer peripheral edge of the outer case 1. The rotating bezel 7 is formed of a material that can transmit radio waves, such as resin, and a part of the rotating bezel 7 covers the antenna 5 (see FIGS. 2 and 3) housed in the outer case 1. Has been placed. The material forming the rotating bezel 7 is not limited to resin.
The rotating bezel 7 includes a groove 71 that fits with the flange 15 at a position corresponding to the flange 15 of the outer case 1. The rotating bezel 7 is locked onto the bezel mounting portion 12 by fitting the groove portion 71 to the flange portion 15 from the outside, and is centered on the annular center of the rotating bezel 7 (that is, in the present embodiment, the exterior bezel). It can rotate (along the circumferential direction of the case 1). When rotating the rotating bezel 7, the user holds the outer peripheral edge of the rotating bezel 7 and rotates the rotating bezel 7 in a desired direction (clockwise or counterclockwise).

FIG. 4 is a perspective view of the rotating bezel 7 as seen from the back surface side (the side facing the bezel mounting portion 12, that is, the back cover 3 side of the wristwatch 100).
As shown in FIG. 4, a magnetic sheet 72 is attached to the surface on the back side of the rotating bezel 7 along the circumferential direction of the rotating bezel 7. The magnetic sheet 72 is a magnetic body obtained by processing a magnetic material such as ferrite or a material containing magnetic powder into a sheet shape.
In the present embodiment, the magnetic sheet 72 has a substantially C shape in which a part of the sheet formed in a ring shape is cut out.
The magnetic sheet 72 absorbs the radio wave to be incident on the antenna 5 by the magnetic loss of the magnetic material and prevents the transmission of the radio wave, and the portion of the rotating bezel 7 where the magnetic sheet 72 is attached is the radio wave. The portion that is a shielding portion that prevents transmission and the magnetic sheet 72 is not affixed (that is, the portion where the magnetic sheet 72 is cut out) is an open portion 74 that transmits radio waves.

  On the front side of the rotating bezel 7 (viewing side, that is, the side facing the windshield member 2 of the wristwatch 100), the slope is inclined from the windshield member 2 side to the back cover 3 side as it goes from the inner circumference side to the outer circumference side. An information display surface 73 composed of a surface is formed. On this information display surface 73, for example, a scale or the like (not shown) that is divided into 60 parts at equal intervals along the circumferential direction is formed, and an elapsed time from a predetermined time is measured by aligning a pointer with this scale. The rotating bezel 7 can function as a possible timer or the like. The scales and the like formed on the information display surface 73 of the rotating bezel 7 are not limited to those exemplified here. A plurality of scales and the like may be formed on the information display surface 73 so that a plurality of information can be displayed.

  It should be noted that a sensitivity index (not shown) indicating that the portion is the open portion 74 that transmits radio waves is printed, pasted, and vapor deposited on the information display surface 73 at a position corresponding to the open portion 74. It may be attached by means such as engraving. When the sensitivity index is provided, the user can easily confirm the position of the shielding part and the opening part 74 visually from the viewing side of the wristwatch 100 by looking at the position of the sensitivity index. In addition to the general scale provided on the information display surface 73, without providing a separate sensitivity index, for example, the open portion 74 is provided on the back surface of the zero scale position attached to the rotating bezel 7 for the timer, etc. By determining a predetermined index indicating the position of the opening portion 74, the user can easily confirm the positions of the shielding portion and the opening portion 74 only by looking at the scale on the information display surface 73.

As described above, the rotating bezel 7 includes the shielding portion that is a portion to which the magnetic sheet 72 is affixed and the open portion 74 that is a portion to which the magnetic sheet 72 is not affixed, and is rotated by a user operation. When the bezel 7 rotates along the circumferential direction of the outer case 1, the position of the shielding part and the opening part 74 is changed thereby, and the shielded range of the antenna 5 covered by the shielding part can be adjusted. ing.
Adjustment of the shielded range of the antenna 5 will be described with reference to FIGS. 5 and 6. 5 and 6 are views of the arrangement of the antenna 5 and the rotating bezel 7 fixed to the module as viewed from the back side of the wristwatch 100, and the module 4 and the antenna 5 are indicated by a two-dot chain line.

As a result of the user's operation, as shown in FIG. 5, the shielding portion (that is, the portion where the magnetic sheet 72 is affixed) is located above the position where the antenna 5 is disposed (that is, the position in the 6 o'clock direction on the wristwatch 100) When the rotating bezel 7 is rotated so as to come, the upper side of the antenna 5 is covered with the magnetic sheet 72 (that is, the shielded range of the antenna 5 is widened). The radio wave transmission / reception sensitivity of the antenna 5 becomes low.
In addition, as shown in FIG. 6, by the user's operation, the position where the antenna 5 is disposed (that is, the position in the 6 o'clock direction on the wristwatch 100) as shown in FIG. 6. When the rotating bezel 7 is rotated so as to be above the upper side of the antenna 5, the upper side of the antenna 5 is not covered by the magnetic sheet 72 (that is, the shielded area of the antenna 5 disappears), so It becomes easy to enter the antenna 5, and the radio wave transmission / reception sensitivity of the antenna 5 is increased.

  In the present embodiment, the radio wave transmission / reception sensitivity of the antenna 5 is adjusted by the outer case 1 that houses the antenna 5 and the rotating bezel 7 that is disposed above the outer case 1 and covers the antenna 5. A sensitivity adjusting device 10 is configured.

  In addition, the wristwatch 100 includes, for example, a control unit including an input operation unit for performing various mode switching, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. A transmission / reception control circuit unit that controls transmission / reception of radio waves, a time measuring circuit unit that performs time correction, an oscillation circuit unit, a pointer driving circuit unit that drives a pointer, and the like are provided. 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 10 and the wristwatch 100 that is a radio communication device according to the present embodiment will be described.

In the present embodiment, the wristwatch 100 can adjust the radio wave transmission / reception sensitivity of the antenna 5 by adjusting the shielded range of the antenna 5 with the sensitivity adjustment device 10.
In other words, the wristwatch 100 can realize a plurality of communication modes (“pairing mode”, “data synchronization mode”, “terminal search mode / thing leftover prevention mode” described later in this embodiment) realized under different radio wave transmission / reception sensitivities. Thus, the sensitivity adjustment device 10 adjusts the shielded range of the antenna 5 so that the radio wave transmission / reception sensitivity suitable for each communication mode is obtained.
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 terminal device (for example, a friend's terminal device) (that is, an initial stage in which the terminal devices are associated with each other). This is a communication mode for enabling data transmission / reception and the like. For example, when pairing is performed between the wristwatch 100 and a friend's mobile phone, which is a new terminal device, an inquiry signal is transmitted from the wristwatch 100 to the terminal device to be paired, and this is transmitted from the destination terminal device. When a response signal to the inquiry signal is transmitted to the wristwatch 100 and the antenna 5 of the wristwatch 100 receives this response signal and sends it to the control unit, pairing is established between the wristwatch 100 and the terminal device.

When performing pairing, the watch 100 and the terminal device come into contact with each other or approach each other so that an unexpected pairing is not established with other terminal devices existing in the vicinity. It is preferable to adjust so that the radio wave transmission / reception sensitivity of the antenna 5 is lowered to the extent that radio wave transmission / reception is possible.
For this reason, in this embodiment, when an instruction to select the pairing mode is input from the input operation unit or the like and communication is performed in the pairing mode, the magnetic sheet 72 that is the shielding unit of the rotating bezel 7 is attached. The rotating bezel 7 is rotated so that the portion is located above the antenna 5, and the radio wave transmission / reception sensitivity of the antenna 5 is adjusted to be low.
Specifically, when the user rotates the rotating bezel 7, the rotating bezel 7 is rotated to a position where the opening portion 74 is disposed at a position other than the 6 o'clock position of the wristwatch 100, and the shielding portion (the magnetic sheet 72 is affixed). Is adjusted to be at a position covering the upper side of the antenna 5 (see FIG. 5).
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, the individual identification number of the wristwatch 100) from the antenna 5 of the wristwatch 100. Only a terminal device within a distance capable of receiving the inquiry signal receives the signal. The terminal device 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 5 of the wristwatch 100 receives the response signal, the response signal is transmitted to the control unit. The control unit registers the terminal device as a terminal device capable of transmitting / receiving data to / from the wristwatch 100 thereafter. Thus, pairing (initial registration work between terminal devices) is completed.

Whether or not pairing has been established may be notified to the user by a pointer on the dial 6 or a display to that effect on the liquid crystal display unit, blinking lights (not shown), an alarm sound, or the like. preferable.
Further, when the antenna 5 has a low radio wave transmission / reception sensitivity (that is, the magnetic sheet 72 covers the top of the antenna 5), the pairing cannot be properly established with the target terminal device. (In other words, when a display indicating that pairing is not established or the like is displayed), the user rotates the rotating bezel 7 to rotate the opening portion 74 to a position where it is arranged at the 6 o'clock position of the wristwatch 100. The bezel 7 may be rotated so that the opening 74 (the portion where the magnetic sheet 72 is not attached) is adjusted to a position covering the upper side of the antenna 5 and then the pairing is attempted again.

On the other hand, the data synchronization mode is, for example, a terminal device that has already been paired with the wristwatch 100, such as a terminal device worn by the user (for example, an illustration possessed by the user). Mobile phone) and a communication mode that assumes synchronization of data with a terminal device located at a relatively short distance of the wristwatch 100 (for example, a distance from the antenna 5 within a range of about 1 to 2 m). .
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.

Since these are communications performed with a terminal device that has already been paired with the wristwatch 100, there is no possibility of establishing communications with an unexpected terminal device.
For this reason, in the present embodiment, when an instruction to select “data synchronization mode” or “terminal search mode / thing left behind prevention mode” is input from the input operation unit or the like and communication is performed in these communication modes, the rotating bezel 7 The rotating bezel 7 is rotated so that the portion where the magnetic sheet 72 that is the open portion 74 is not attached is positioned above the antenna 5, and the radio wave transmission / reception sensitivity of the antenna 5 is adjusted.
Specifically, when the user rotates the rotating bezel 7, the rotating bezel 7 is rotated to a position where the opening portion 74 is disposed at the 6 o'clock position of the wristwatch 100, and the opening portion 74 (the magnetic sheet 72 is affixed). The adjustment is made so that the not-shown portion is positioned above the antenna 5 (see FIG. 6).
As a result, the wristwatch 100 can transmit and receive radio waves to and from the terminal device at which the antenna 5 is slightly separated. For example, the wristwatch 100 transmits and receives data to and from the mobile phone worn by the user. By performing the above, mutual data can be synchronized. For example, in the terminal search mode, a signal requesting a response is transmitted from the antenna 5 of the wristwatch 100 to a paired terminal device existing within a range of about 5 m from the wristwatch 100, and the terminal device transmits this signal. When a response signal is transmitted to the wristwatch 100, the user is notified of this by a sound such as a buzzer or a flashing light. In addition, for example, in the lost article prevention mode, a signal requesting a response is transmitted from the antenna 5 of the wristwatch 100 to the paired terminal device, and the terminal device receives this signal and transmits a response signal to the wristwatch 100. To do. When the response signal from the terminal device cannot be received, the control unit of the wristwatch 100 determines that the terminal device is separated from the user by a predetermined distance (in this embodiment, 5 m which is a range in which the antenna 5 can transmit and receive radio waves). Then, this is notified to the user by a sound such as a buzzer or a blinking light.

As described above, according to the present embodiment, it is possible to realize a plurality of communication modes (for example, the pairing mode, the data synchronization mode, the terminal search mode / the lost item prevention mode) realized under different radio wave transmission / reception sensitivities. Various communications according to the user's purpose and application can be performed.
Then, as a method for adjusting the radio wave transmission / reception sensitivity of the antenna 5 to a sensitivity suitable for these communication modes, a mechanical configuration is adopted in which the shielded range of the antenna 5 covered by the shielding portion is adjusted by rotating the rotating bezel 7. Therefore, compared with the case where radio wave transmission / reception sensitivity is switched in a communication-related module such as a reception circuit, the power consumption required for adjusting the radio wave transmission / reception sensitivity of the antenna 5 can be suppressed.
In the case of the wristwatch 100, it is required to reduce the size and weight, and it is difficult to secure a space for accommodating a large battery. However, the wristwatch 100 according to the present embodiment includes an exterior case 1 that holds the antenna 5 and the exterior case. A sensitivity adjustment device 10 is provided which includes a rotating bezel 7 disposed above the case 1 and covering the antenna 5, and the radio wave transmission / reception sensitivity of the antenna 5 can be adjusted by a mechanical configuration. . For this reason, compared with the case where the radio wave transmission / reception sensitivity is switched in the communication-related module, the power consumption can be suppressed, and since there is no need to provide a large battery or the like, the apparatus can be reduced in size and weight. .
Further, since the radio wave transmission / reception sensitivity of the antenna 5 can be adjusted by rotating the rotating bezel 7 having the shielding part and the open part 74, the communication mode can be provided without newly providing a member for adjusting the radio wave transmission / reception sensitivity. Therefore, it is possible to adjust the sensitivity suitable for the apparatus, simplifying the device configuration, and reducing the size and weight.
Moreover, since the shielding part is configured by sticking a magnetic sheet 72, which is a magnetic body, on the back side of the rotating bezel 7, the existing standard rotating bezel 7 can be easily diverted, and the production cost can be reduced. It can be kept low.

In the present embodiment, the case where the magnetic sheet 72 that is a magnetic material is arranged in a substantially C shape is taken as an example, but the shape of the magnetic sheet 72 is not limited to this.
For example, as shown in FIG. 7, a magnetic sheet 82 having a size capable of covering the antenna 5 may be attached only to a part of the back surface side of the rotating bezel 81. In this case, the part to which the magnetic sheet 82 is affixed becomes the shielding part, and the other part becomes the opening part 84.
Therefore, when performing pairing (that is, in the “pairing mode”), as shown in FIG. 8, the rotating bezel 8 is rotated to a position where the portion where the magnetic sheet 82 is attached covers the antenna 5. . Thereby, the radio wave transmission / reception sensitivity of the antenna 5 can be reduced to a sensitivity suitable for pairing. Then, when pairing between the terminal devices is not established in the state shown in FIG. 8 or when data is synchronized between the terminal devices with which pairing is established (that is, in the “data synchronization mode”), When searching for a terminal in which a ring is established (that is, in the “terminal search mode / thing-for-things prevention mode”), the portion where the magnetic sheet 82 is not attached is shown in FIG. The rotating bezel 8 is rotated so as to be positioned above. As a result, the radio wave transmission / reception sensitivity of the antenna 5 can be increased to the extent that radio waves can be transmitted / received even between terminal devices at remote locations.

  Moreover, although this embodiment demonstrated the case where the magnetic body was the magnetic sheet 72 affixed on the rotation bezel 7, a magnetic body may not be a sheet-like thing. For example, the shielding portion may be formed by embedding a magnetic material in a part of the rotating bezel 7.

In the present embodiment, in the rotating bezel 7, the case where the part to which the magnetic sheet 72, which is a magnetic body, is attached, becomes a shielding part, and the part to which the magnetic sheet 72 is not attached becomes the opening part 74 has been described. The configuration of the shielding part and the opening part is not limited to this.
For example, a part of the rotating bezel may be configured as a thick part formed thicker than the other part so that radio waves are less likely to pass through than the other part. In this case, the thick part becomes the shielding part, and the other part becomes the open part. In order to indicate the position of the thick portion, it is preferable that a sensitivity index indicating that the portion is a shielding portion is attached to a position corresponding to the thick portion on the surface side of the rotating bezel.
As described above, even when the thick portion becomes the shielding portion and the other portion becomes the open portion, the radio wave transmission / reception sensitivity of the antenna 5 can be adjusted by the mechanical configuration, and a large battery is used for sensitivity adjustment. Therefore, the apparatus can be reduced in size and weight.
In addition, for example, a part of a rotating bezel formed of a metal material may be cut out, and a member formed of a material that transmits radio waves such as resin or glass may be fitted into the cutout portion (or hole). . In this case, a portion into which a member formed of a material that transmits radio waves is fitted becomes an open portion, and the other portion becomes a shielding portion.

  Further, in the present embodiment, a case has been described in which a magnetic body is disposed in the shielding part and the transmission of the radio wave is prevented by absorbing the radio wave due to the magnetic loss of the magnetic material. Any configuration can be used, and the configuration is not limited to a configuration that absorbs radio waves due to magnetic loss.

  In the present embodiment, the case where the wristwatch 100 is an analog wristwatch provided with a pointer has been described, but the wristwatch is not limited to an analog wristwatch. For example, a digital wristwatch provided with a liquid crystal display unit composed of a liquid crystal panel or the like, or a wristwatch provided with both a pointer and a liquid crystal display unit may be used.

Further, in this embodiment, when performing communication in the “pairing mode”, a shielding portion is positioned on the antenna 5 and when performing communication in the “data synchronization mode” or “terminal search mode / thing leftover prevention mode”. Has been described as an example in which the two-step adjustment of the radio wave transmission / reception sensitivity of the antenna 5 is performed such that the open part is positioned on the antenna 5, but the adjustment of the radio wave transmission / reception sensitivity of the antenna 5 is limited to two steps. Not.
For example, by adjusting the positional relationship between the shielding unit and the antenna 5 in a stepwise manner, a state where the entire antenna 5 is shielded, a state where the antenna 5 is partially shielded, a state where the entire antenna 5 is not shielded, Multiple stages of adjustment may be possible. In this case, when the user performs communication in the “pairing mode” and the pairing is not established in a state where the entire antenna 5 is shielded, the radio wave transmission / reception of the antenna 5 is performed until the pairing is established. The sensitivity can be increased step by step.

  In addition, it cannot be overemphasized that this invention is not limited to this embodiment, and can be changed suitably.

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 radio wave transmission / reception sensitivity of an antenna capable of transmitting and receiving radio signals to and from an external device,
An outer case for housing the antenna;
It is formed in an annular shape along the outer peripheral edge of the outer case, and is disposed on the outer case so as to cover the antenna, and is fitted to the outer case from the outside and rotated around the center of the ring A rotating bezel provided as possible,
With
The rotating bezel includes a shielding part that prevents transmission of radio waves and an opening part that transmits radio waves. The rotating bezel changes the positions of the shielding part and the opening part by rotating the rotating bezel, and is shielded by the shielding part. A sensitivity adjustment device configured to be capable of adjusting a radio wave transmission / reception sensitivity of the antenna by adjusting a shielded range of the antenna.
<Claim 2>
The sensitivity adjusting apparatus according to claim 1, wherein the shielding unit is configured by attaching a magnetic body to a back surface side of the rotating bezel.
<Claim 3>
The sensitivity adjustment device according to claim 1 or 2,
An antenna whose radio wave transmission / reception sensitivity is adjusted by the sensitivity adjustment device;
A wristwatch comprising:

DESCRIPTION OF SYMBOLS 1 Exterior case 4 Module 5 Antenna 6 Dial 7 Rotating bezel 10 Sensitivity adjusting device 72 Magnetic sheet 73 Sensitivity index 74 Opening part 100 Wristwatch

Claims (5)

A sensitivity adjustment device that adjusts the radio wave transmission / reception sensitivity of an antenna capable of transmitting and receiving radio signals to and from an external device,
An outer case for housing the antenna;
It is formed in an annular shape along the outer peripheral edge of the outer case, and is disposed on the outer case so as to cover the antenna, and is fitted to the outer case from the outside and rotated around the center of the ring A rotating bezel provided as possible,
With
The rotating bezel includes a shielding part formed by applying a radio wave shielding material that prevents transmission of radio waves, a notch part or a hole part that is an open part that transmits radio waves to a part of its circumferential direction, and the opening. comprising a indicator portion indicating the position of the part, the sensitivity adjusting device and adjusting the target shielding range of the antenna is shielded by the shielding portion. The shielding portion is formed with a size covering the antenna,
The sensitivity adjustment apparatus according to claim 1, wherein the radio wave transmission / reception sensitivity is lowered when the antenna is covered by the shielding portion by rotation of the rotating bezel.   The sensitivity adjusting device according to claim 1, wherein the shielding unit is configured by attaching a magnetic body to a back surface side of the rotating bezel. The sensitivity adjustment device according to any one of claims 1 to 3,
An antenna whose radio wave transmission / reception sensitivity is adjusted by the sensitivity adjustment device;
A wristwatch comprising: An antenna that communicates radio signals with external devices;
A rotating bezel that is disposed at a position covering the antenna and is provided to be rotatable around its annular center;
With
The rotating bezel, wave shielding material is attached, the sensitivity adjustment, characterized in that it comprises a part of the notched portion or the hole have a, indicator portion further indicates the position of the notch or the hole apparatus.

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