JP5776444B2 - 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 that is housed in an exterior case whose opening is closed by a lid member and can transmit and receive radio signals to and from an external device,
The lid member is
A lid body attached to the opening of the exterior case;
A rotating member disposed at a position covering the antenna and rotatably attached to the lid body;
With
The rotary member includes a Turkey adjust the target shielding range of the antenna circumferential direction along a releasing portion for transmitting a radio wave and a shielding portion that prevents the transmission of radio waves, which are shielded by the front Symbol shielding portion of the rotating It is characterized by.

Moreover, the wristwatch according to the present invention is
The sensitivity adjustment device according to any one of claims 1 to 4 ,
An antenna whose radio wave transmission / reception sensitivity is adjusted by the sensitivity adjustment device;
A module for holding the antenna;
An outer case for housing the antenna and the module;
It is characterized by having.

  According to the present invention, as a technique for adjusting the radio wave transmission / reception sensitivity of an antenna to a sensitivity suitable for the communication mode, a machine that adjusts the shielded range of the antenna covered by the shielding portion by rotating a rotating member attached to the lid body. As a result, the power consumption required for adjusting the radio wave transmission / reception sensitivity of the antenna can be reduced compared to the case where the transmission / reception sensitivity is switched in a communication-related module such as a reception circuit. .

It is a front view of a wristwatch to which a sensitivity adjustment device in this embodiment is applied. It is the top view which looked at the wristwatch shown in FIG. 1 from the back side. It is the III-III sectional view taken on the line of the wristwatch of FIG. It is principal part sectional drawing to which the dashed-dotted line part in FIG. 3 was expanded. FIG. 5 is a cross-sectional perspective view taken along line VV in the wristwatch of FIG. 1. It is a principal part cross-sectional perspective view which expanded the dashed-dotted line part in FIG. It is a perspective view which shows the rotation member in this embodiment. It is a top view of the wristwatch which showed arrangement of a rotation member in the case where it becomes a state where transmission and reception sensitivity of an antenna will be low. It is the perspective view of the wristwatch which showed arrangement | positioning of the rotation member in the case where the transmission / reception sensitivity of an antenna will be in a high state. It is a perspective view which shows one modification of a rotating member. FIG. 11 is a perspective view of a wristwatch showing the arrangement of the rotating members shown in FIG. 10 when the antenna transmission / reception sensitivity is low. FIG. 11 is a plan view of a wristwatch showing the arrangement of the rotating members shown in FIG. 10 when the antenna transmission / reception sensitivity is high.

  Hereinafter, with reference to FIGS. 1 to 9, a preferred embodiment of a sensitivity adjustment device according to the present invention and a wristwatch including the sensitivity adjustment device 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.

FIG. 1 is a front view in which a part of the wristwatch according to the present embodiment is cut away, and FIG. 2 is a view of the wristwatch of FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, and FIG. 4 is an enlarged view of an alternate long and short dash line portion in FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 1, and FIG. 6 is an enlarged view of an alternate long and short dash line portion in FIG.
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 addition, in FIG. 1 to FIG.

  As shown in FIGS. 1 and 3, 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 attached to both upper and lower end portions (upper and lower end portions in FIG. 1) of the outer case 1, that is, an end portion on the 12 o'clock side and an end portion on the 6 o'clock direction. Is formed.
Further, a through hole 12 (see FIG. 3) penetrating into the exterior case 1 is formed on the side surface of the exterior case 1. In the present embodiment, the through hole 12 is formed on the side surface of the wristwatch 100 in the 3 o'clock direction, but the position where the through hole 12 is provided is not limited thereto. For example, the through hole 12 may be provided at a position in the 9 o'clock direction or a position in the 4 o'clock direction.

As shown in FIG. 3, a hollow cylindrical member 13 is inserted into the through hole 12 from the outside to the inside of the exterior case 1. A shaft member 21 that is inserted into the through hole 12 through the tubular member 13 and is inserted into the exterior case 1 from the outside to the side where the through hole 12 is provided is the side portion of the exterior case 1. The crown 2 is provided with a crown top 22 formed on one end side of the shaft member 21 and having a diameter larger than the inner diameter of the tubular member 13.
A gear (not shown) is provided at the end of the shaft member 21 on the insertion side, and this gear is, for example, a wheel train for rotating various hands such as a minute hand (not shown) provided in the module 3 described later. Connected to some. When the crown 2 is rotated, the rotational force is transmitted to the train wheel that rotates the pointer, and the position of the pointer can be adjusted, the time can be adjusted, and the like.

Inside the outer case 1, a module 3 formed in a substantially cylindrical shape is disposed. The shape of the module 3 is not limited to a cylindrical shape. The module 3 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.
The module 3 is supported by the middle frame member 14 from the back side of the wristwatch 100 (the lower side in FIG. 3).

As shown in FIGS. 5 and 6, in the present embodiment, the lower side of the module 3 (the back side of the wristwatch 100) and the position corresponding to the wristwatch approximately 6 o'clock in the peripheral portion of the module 3 (the lower side in FIG. 1). A concave portion 31 is formed at a side position), and a small chip-shaped or loop-shaped antenna 4 is disposed in the concave portion 31.
The antenna 4 is held on the module 3 by, for example, adhesive fixing. In addition, it is not essential that the concave portion 31 is formed in the module 3, and the antenna 4 may be disposed on a flat surface. The antenna 4 may be attached to the surface of the module 3 or may be embedded in the module 3. Further, the position where the antenna 4 is disposed is not limited to the one illustrated here, and may be another position.

The antenna 4 can transmit and receive radio signals to and from an external device, and performs communication according to a standard such as Bluetooth (registered trademark). The communication standard of the antenna 4 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 the frequency etc.) are appropriately applied. The Moreover, the antenna 4 should just be a small thing, and a kind and shape are not specifically limited. As will be described later, in the present embodiment, the antenna 4 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 4 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 4 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 this embodiment, the antenna 4 and the transmission / reception control circuit (not shown) always maintain the maximum radio wave transmission / reception sensitivity (for example, radio wave transmission / reception sensitivity capable of transmitting / receiving radio waves within a range of about 5 m from the antenna 4 in this embodiment). As will be described later, the radio wave transmission / reception sensitivity is adjusted by the mechanical configuration by changing the shielded range of the antenna 4 by the sensitivity adjusting device 10 (see FIG. 3).

A dial plate 5 is disposed in the outer case 1 and on the upper side of the module 3 (the upper side in FIG. 3, that is, the viewing side of the wristwatch 100). In addition to the analog type dial plate 5, a liquid crystal display unit or the like that displays numbers, letters, and the like in a digital manner may be provided above the module 3.
A parting member 6 formed in an annular shape (ring shape) is provided on the dial plate 5, that is, above the module 3 so as to be rotatable around the annular center. The parting member 6 is not limited to a rotatable member.

The exterior case 1 has an opening on the front side (upper side in FIGS. 3 and 4) and an opening on the back side (lower side in FIGS. 3 and 4). A windshield member 7 made of a material such as transparent glass is attached to the opening on the front side of the outer case 1 so as to close the opening on the front side via a waterproof ring or the like (not shown). .
On the other hand, a back cover member 8 as a cover member is attached to the opening on the back side of the outer case 1 through a waterproof ring 15 so as to close the opening on the back side.

Here, the back cover member 8 provided in the wristwatch of the present embodiment will be described in detail with reference to FIGS.
In the present embodiment, the back cover member 8 includes a back cover body 81, a rotating member 82, and a locking ring member 83.
In the present embodiment, among the members constituting the back cover member 8, the back cover body 81 and the locking ring member 83 are formed of a metal material such as stainless steel or titanium, and the rotating member 82 is, for example, It is made of resin such as industrial plastic and engineer plastic (for example, polyacetal (POM), polyamide (PA), polycarbonate (PC), etc.). In addition, the material which forms the back cover main body 81, the rotation member 82, and the locking ring member 83 is not limited to this, For example, the back cover main body 81 and the locking ring member 83 are made of a material other than a metal such as a resin. The rotating member 82 may be formed of a material other than those listed here.

As shown in FIG. 2, FIG. 3, FIG. 7, etc., the back lid body 81 is an annular (ring-shaped) member having an approximately central opening, and is a lid body attached to the opening of the exterior case 1. The back cover body 81 is provided with locking portions 811 at four locations along the outer periphery thereof, and screw holes 811 a are formed in the locking portions 811. The back cover member 8 is attached to the outer case 1 by fixing the engaging portion 811 of the back cover main body 81 to the outer case 1 with screws 84. In addition, the structure which attaches the back cover member 8 to the exterior case 1 is not limited to what was illustrated here.
Further, on the inner peripheral surface of the back cover main body 81, a main body side thread groove 812 that is screwed with a ring side thread groove 832 of a locking ring member 83 to be described later is formed.
Further, in the present embodiment, it is a surface on the back side of the back cover body 81 (that is, a surface that is on the outside when the back cover member 8 is attached to the exterior case 1), and corresponds to the position where the antenna 4 is provided. An antenna index 813 indicating the position of the antenna 4 is attached to the position (that is, the 6 o'clock side of the wristwatch 100). The antenna index 813 is formed on the back lid body 81 by means such as printing, sticking, vapor deposition, or engraving.

A substantially disk-shaped rotating member 82 is rotatably disposed on the back cover body 81 via a waterproof ring 85 so as to close the opening 814.
The rotating member 82 is formed so as to have substantially the same outer diameter as the inner diameter of the opening 814 of the back cover body 81, and the opening of the back cover body 81 from the surface side (upper side in FIG. 3) of the back cover body 81. By fitting in 814, the opening 814 of the back cover body 81 is closed with almost no gap.
Further, the outer periphery on the surface side of the rotating member 82 (that is, the inner side when the back cover member 8 is attached to the exterior case 1) has an outer diameter larger than the inner diameter of the opening 814 of the back cover body 81. A flange 822 is provided, and when the rotary member 82 is fitted into the opening 814 of the back cover main body 81, the flange 822 is locked inside the back cover main body 81.
As described above, the rotating member 82 is formed of a material that can transmit radio waves, such as resin, and a part of the rotating member 82 is disposed so as to cover the antenna 4 held on the module 3. . In addition, the material which forms the rotation member 82 is not limited to resin.

FIG. 7 is a plan view of the rotating member 82 as viewed from the front surface side (that is, the inner side when the back cover member 8 is attached to the exterior case 1).
As shown in FIG. 7, a magnetic sheet 825 is stuck (arranged) on the front surface of the rotating member 82 along the circumferential direction of rotation of the rotating member 82. The magnetic sheet 825 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 825 has a substantially C shape in which a part of the sheet formed in a ring shape is cut out.
The magnetic sheet 825 absorbs radio waves to be incident on the antenna 4 due to magnetic loss of the magnetic material to prevent transmission of radio waves, and a portion of the rotating member 82 to which the magnetic sheet 825 is attached (arranged). Is a shielding part that prevents transmission of radio waves, and a part where the magnetic sheet 825 is not attached (arranged) (that is, a part where the magnetic sheet 825 is cut out) is an open part 826 that transmits radio waves.

Further, as shown in FIG. 2, the surface on the back side of the rotating member 82 (that is, the surface that becomes the outside when the back cover member 8 is attached to the exterior case 1), and the position corresponding to the opening 826, A sensitivity index 827 indicating that the part is an open part 826 that transmits radio waves is attached. The sensitivity index 827 is formed on the rotating member 82 by means such as printing, sticking, vapor deposition, or engraving. Note that the position to which the sensitivity index 827 is attached is not limited to the position corresponding to the opening 826. For example, a position that is point-symmetric with the opening 826 (when the center point of the disk-shaped rotating member 82 is a symmetric point) Or a position corresponding to the point symmetry position).
By providing the sensitivity index 827 as described above, the user can easily visually check from the viewing side of the wristwatch 100 (that is, the portion on which the magnetic sheet 825 is attached) and open by viewing the position of the sensitivity index 827. The position of the portion 826 can be confirmed.
In the present embodiment, as described above, the antenna index 813 indicating the position of the antenna 4 is attached to the back surface of the back cover body 81, and the sensitivity index 827 is matched with the antenna index 813. The opening 826 can be easily aligned with the position of the antenna 4.

Further, as shown in FIG. 2 and FIG. 5, the back surface of the rotating member 82 (that is, the surface that becomes the outside when the back cover member 8 is attached to the exterior case 1) is formed in a substantially elongated central portion. A groove-shaped recess 828 is provided. The concave portion 828 is formed in a substantially circular arc shape with the deepest central portion in the longitudinal direction. Note that the size, depth, shape, and the like of the recess 828 are not particularly limited as long as a human toe or a coin can be inserted.
The rotating member 82 can be rotated clockwise or counterclockwise to an arbitrary position by inserting a toe, a coin or the like into the recess 828 and rotating it in any arrow direction in FIG. It has become. Then, by rotating the rotating member 82, the position of the shielding portion (that is, the portion to which the magnetic sheet 825 is attached) and the opening portion 826 are changed, and the shielded range of the antenna 4 shielded by the shielding portion is adjusted. Thus, the radio wave transmission / reception sensitivity of the antenna 4 can be adjusted.

The locking ring member 83 is an annular (ring-shaped) member in which a ring-side thread groove 832 is formed on the outer peripheral surface.
On one end side of the locking ring member 83, an overhanging portion 833 that protrudes substantially horizontally toward the annular center of the locking ring member 83 is formed. The overhang portion 833 may be provided over the entire circumference of the locking ring member 83 or may be provided partially at several locations along the inner circumference of the locking ring member 83. Also good.
The locking ring member 83 is fitted between the outer peripheral surface of the rotating member 82 and the inner peripheral surface of the back cover body 81 after the rotating member 82 is fitted into the back cover body 81, so that the rotating member 82 is attached to the back cover body 81. It is locked so as not to fall off from the lid main body 81.
Specifically, the protruding portion 833 of the locking ring member 83 is rotated by screwing the ring-side screw groove 832 of the locking ring member 83 and the main-body side screw groove 812 of the back cover main body 81. The collar portion 822 of 82 is locked from the upper side (the upper side in FIGS. 3 and 4). As a result, the flange portion 822 of the rotating member 82 is pressed against the waterproof ring 85 so that the airtightness of the back cover member 8 is secured, and the rotating member 82 is rotatably attached to the back cover body 81. .

As described above, the rotating member 82 includes a shielding portion that is a portion to which the magnetic sheet 825 is affixed and an open portion 826 that is a portion to which the magnetic sheet 825 is not affixed, and is rotated by a user operation. When the member 82 rotates along the circumferential direction of the exterior case 1, the position of the shielding part and the opening part 826 is changed thereby, and the shielded range of the antenna 4 covered by the shielding part can be adjusted. ing.
Adjustment of the shielded range of the antenna 4 will be described with reference to FIGS. 8 and 9. 8 and 9 are views of the arrangement of the antenna 4 and the rotating member 82 fixed to the module 3 as viewed from the surface side of the wristwatch 100 (upper side in FIG. 3). The module 3 and the antenna 4 are indicated by a two-dot chain line. Represents.

As shown in FIG. 8, by the user's operation, the shielding portion (that is, the portion to which the magnetic sheet 825 is attached) is located above the position where the antenna 4 is disposed (that is, the position in the 6 o'clock direction on the wristwatch 100). When the rotating member 82 is rotated so as to come, the upper side of the antenna 4 is covered with the magnetic sheet 825 (that is, the shielded range of the antenna 4 is widened), so that the radio wave entering the antenna 4 is incident on the magnetic sheet 825. Therefore, the radio wave transmission / reception sensitivity of the antenna 4 is lowered.
In addition, as shown in FIG. 9, by the user's operation, the position where the antenna 4 is disposed (that is, the position of the wristwatch 100 in the 6 o'clock direction) where the opening 826 (that is, the portion where the magnetic sheet 825 is not attached) is disposed. When the rotating member 82 is rotated so as to be above the upper side of the antenna 4, the upper side of the antenna 4 is not covered with the magnetic sheet 825 (that is, the shielded area of the antenna 4 disappears). It becomes easy to enter the antenna 4, and the radio wave transmission / reception sensitivity of the antenna 4 is increased.

  In the present embodiment, the antenna 4 includes the back cover body 81 of the back cover member 8 that closes the opening of the outer case 1 and the rotating member 82 that is rotatably attached to the back cover body 81. A sensitivity adjustment device 10 for adjusting radio wave transmission / reception sensitivity 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 4 by adjusting the shielded range of the antenna 4 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. The sensitivity adjustment device 10 adjusts the shielded range of the antenna 4 so as to obtain radio wave transmission / reception sensitivity suitable for each of these communication modes.
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 4 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 4 is lowered to the extent that radio wave transmission / reception is possible.
For this reason, in this embodiment, when an instruction to select a pairing mode is input from the input operation unit or the like and communication is performed in the pairing mode, a magnetic sheet 825 that is a shielding unit of the rotating member 82 is attached. The rotating member 82 is rotated so that the portion is located above the antenna 4, and the radio wave transmission / reception sensitivity of the antenna 4 is adjusted to be low.
Specifically, when the user inserts a claw or a coin into the recess 828 of the rotating member 82 and operates the rotating member 82 to rotate, the sensitivity index 827 provided corresponding to the opening 826 is changed to the wristwatch 100. The rotating member 82 is rotated to a position other than the 6 o'clock position so that the shielding portion (the portion where the magnetic sheet 825 is attached) is adjusted to a position covering the upper side of the antenna 4 (see FIG. 8). .
In this state, when the user contacts the terminal device to be paired with the wristwatch 100 or brings the terminal device 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 4 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 4 of the wristwatch 100 receives this 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 plate 5, a display to that effect on the liquid crystal display unit, a blinking light (not shown), an alarm sound, or the like. preferable.
In addition, when the antenna 4 has low radio wave transmission / reception sensitivity (that is, the magnetic sheet 825 covers the upper side of the antenna 4), the pairing cannot be properly established with the target terminal device. (In other words, when a message indicating that pairing has not been established, etc.), the user inserts a claw or a coin into the recess 828 of the rotating member 82 and rotates the rotating member 82, The rotating member 82 is rotated to the position where the sensitivity index 827 is arranged at the 6 o'clock position of the wristwatch 100, and the opening 826 (the portion where the magnetic sheet 825 is not attached) is adjusted to a position covering the upper side of the antenna 4. Then, the pairing may be tried 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, within a range of about 1 to 2 m from the antenna 4). .
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 this 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 member 82 is used. The rotating member 82 is rotated so that the portion to which the magnetic sheet 825 that is the open portion 826 is not attached is positioned above the antenna 4, and the radio wave transmission / reception sensitivity of the antenna 4 is adjusted to be high.
Specifically, when the user inserts a claw or a coin into the recess 828 of the rotating member 82 and operates the rotating member 82 to rotate, the sensitivity index 827 provided corresponding to the opening 826 is changed to the wristwatch 100. The rotating member 82 is rotated to the position where it is arranged at the 6 o'clock position, and the opening 826 (the portion where the magnetic sheet 825 is not attached) is adjusted to be positioned above the antenna 4 (see FIG. 9).
As a result, the wristwatch 100 can transmit and receive radio waves to and from the terminal device in which the antenna 4 is slightly separated. For example, the wristwatch 100 transmits and receives data to and from a 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 4 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 forgotten item prevention mode, a signal requesting a response is transmitted from the antenna 4 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. Then, 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 4 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 4 to a sensitivity suitable for these communication modes, a mechanical configuration is adopted in which the rotating member 82 is rotated to adjust the shielded range of the antenna 4 covered by the shielding portion. 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 4 can be suppressed.
Further, in the case of the wristwatch 100, it is required to be small and light, and it is difficult to secure a space for accommodating a large battery. However, the wristwatch 100 according to the present embodiment has a back cover that is attached to the opening of the exterior case 1. A sensitivity adjusting device 10 including a main body 81 and a rotating member 82 disposed at a position covering the antenna 4 is provided, and the radio wave transmission / reception sensitivity of the antenna 4 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, the rotating member 82 constituting the back cover member 8 that closes the opening of the exterior case 1 is provided with a shielding portion and an opening portion 826, and the rotating member 82 is rotated to adjust the radio wave transmission / reception sensitivity of the antenna 4. Therefore, it is possible to adjust the sensitivity suitable for the communication mode without providing a new member for adjusting the radio wave transmission / reception sensitivity, thereby realizing simplification of the device configuration and reduction in size and weight. be able to.
In addition, since the shielding portion is configured by sticking a magnetic sheet 825 that is a magnetic body on the back surface side of the rotating member 82, it is easy to manufacture and the production cost can be kept low.

  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 the above-described embodiment, the case where the magnetic sheet 825 that is a magnetic body is arranged in a substantially C shape is taken as an example, but the shape and arrangement of the magnetic sheet 825 are not limited to this.
For example, as shown in FIG. 10, a magnetic sheet 925 of a size that can cover the antenna 4 may be attached only to a part of the back surface side of the rotating member 92 that constitutes the sensitivity adjusting device 20. In this case, the part to which the magnetic sheet 925 is affixed becomes the shielding part, and the other part becomes the opening part 926.
Therefore, when performing pairing (that is, in the “pairing mode”), as shown in FIG. 11, the rotating member 92 is rotated to a position where the portion where the magnetic sheet 925 is attached covers the antenna 4. . Thereby, the radio wave transmission / reception sensitivity of the antenna 4 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. 11 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 (ie, in the “terminal search mode / thing left behind prevention mode”), as shown in FIG. 12, the opening 926 (ie, the magnetic sheet 925 is not attached) The rotating member 92 is rotated so that the portion) is positioned on the antenna 4. Thereby, the radio wave transmission / reception sensitivity of the antenna 4 can be increased to such an extent that radio waves can be transmitted / received even between terminal devices located at remote locations.

In this embodiment, the case where the magnetic body is the magnetic sheet 825 attached to the rotating member 82 has been described. However, the magnetic body may not be a sheet-like one.
Moreover, the magnetic body should just be arrange | positioned in the surface facing the antenna 4 of the rotation member 82, and the method of arrange | positioning a magnetic body is not limited to sticking. For example, the shielding part may be formed by embedding a magnetic material in a part of the rotating member 82, or the magnetic material may be applied to the rotating member 82 by a technique such as vapor deposition and printing of a magnetic material or a material containing magnetic powder. It may be arranged to form a shielding part.

Further, in the present embodiment, in the rotating member 82, a portion where the magnetic sheet 825 which is a magnetic body is attached (arranged) serves as a shielding portion, and a portion where the magnetic sheet 825 is not attached (arranged) is an open portion 826. However, the configuration of the shielding part and the opening part is not limited to this.
For example, the rotating member itself is made of a radio wave shielding material that prevents transmission of radio waves, and a part of this rotating member is made thicker than other parts so that radio waves are less likely to pass through other parts. You may comprise. A radio wave shielding material is a material that can prevent the transmission of radio waves, such as a radio wave absorber that absorbs radio waves. Specifically, for example, a magnetic material or a material containing magnetic powder is molded into a predetermined shape. Or by sticking a magnetic sheet to a base material molded into a predetermined shape. In this case, the thick part becomes the shielding part, and the other part becomes the open part. In addition, in order to show the position of the thick portion, the surface on the back side of the rotating member (that is, the surface that becomes the outside when the back cover member is attached to the exterior case), the position corresponding to the thick portion It is preferable that a sensitivity index indicating that the portion is a shielding portion is attached.
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 4 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.

  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.

  The rotating member is disposed at a position where the antenna 4 can be covered, and rotates to change the positions of the shielding portion and the opening portion, thereby adjusting the shielded range of the antenna 4 shielded by the shielding portion. The shape, size, etc. are not limited to those exemplified here. For example, it is good also as a structure which provides a rotation member with a diameter smaller than what was illustrated by this embodiment. Further, the rotating member is not limited to the one disposed at the substantially central portion of the back cover member 8, and may be disposed at a position corresponding to the antenna 4.

  In this embodiment, the back cover member 8 includes a back cover body 81, a rotation member 82, and a locking ring member 83, and the rotation member 82 is locked to the back cover body 81 by the locking ring member 83. However, the configuration for locking the rotating member 82 to the back cover body 81 is not limited to this.

  Further, in the present embodiment, a case has been described in which the rotating member 82 is provided with the recess 828 and a claw or a coin is inserted into the recess 828 to rotate the rotating member 82. However, the rotating member 82 is rotated. Is not limited to this. For example, it is good also as a structure which provides a convex part in the rotation member 82, and rotates the rotation member 82 by a user putting a finger | toe on a convex part.

In the present embodiment, when performing communication in the “pairing mode”, the shielding unit is positioned on the antenna 4 and when performing communication in the “data synchronization mode” or the “terminal search mode / thing leftover prevention mode”. In the above description, the case where the two-step adjustment of the radio wave transmission / reception sensitivity of the antenna 4 is performed, for example, the open part is positioned on the antenna 4, but the adjustment of the radio wave transmission / reception sensitivity of the antenna 4 is limited to two steps. Not.
For example, by adjusting the positional relationship between the shielding unit and the antenna 4 in stages, the state in which the entire antenna 4 is shielded, the state in which the antenna 4 is partially shielded, the state in which the entire antenna 4 is not shielded, Multiple stages of adjustment may be possible. In this case, when the user performs communication in the “pairing mode”, when the pairing is not established in a state where the entire antenna 4 is shielded, the radio wave transmission / reception of the antenna 4 is performed until the pairing is established. The sensitivity can be increased step by step.

  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 the present embodiment, the case where the exterior case 1 of the wristwatch 100 is substantially circular and the case back body 81 is annular (ring-shaped) has been described as an example, but the shape of the exterior case 1 of the wristwatch 100 is particularly It is not limited, For example, a square, an ellipse, etc. may be sufficient. Also in this case, the rotating member has a rotatable shape (for example, a disk shape), but the shape of the back cover body and the entire back cover member is a shape (for example, a square shape, an oval shape, etc.) corresponding to the shape of the exterior case 1. To do.

  Moreover, in the said embodiment, although the case where the sensitivity adjustment apparatus 10 was applied to a wristwatch was shown as an example, the apparatus which can apply the sensitivity adjustment apparatus 10 is not restricted to a wristwatch, The exterior by which an opening part is obstruct | occluded with a cover member The present invention can be applied to any device having a case. For example, the present invention may be applied to various mobile terminal devices such as mobile phones and PDAs, portable music playback devices, and small radios.

  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 that is housed in an exterior case whose opening is closed by a lid member and can transmit and receive radio signals to and from an external device,
The lid member is
A lid body attached to the opening of the exterior case;
A rotating member disposed at a position covering the antenna and rotatably attached to the lid body;
With
The rotating member includes a shielding portion that prevents transmission of radio waves along a circumferential direction of rotation and an opening portion that transmits radio waves, and changes the positions of the shielding portion and the opening portion by rotating the rotating member. The sensitivity adjustment device is configured to be capable of adjusting the radio wave transmission / reception sensitivity of the antenna by adjusting a shielded range of the antenna shielded by the shielding unit.
<Claim 2>
The sensitivity adjusting apparatus according to claim 1, wherein the shielding portion is configured by providing a magnetic body on a surface of the rotating member facing the antenna.
<Claim 3>
The rotating member has a thick part formed thicker than the other part in a part of the circumferential direction of the rotation,
The sensitivity adjusting apparatus according to claim 1, wherein the shielding portion is configured by the thick portion.
<Claim 4>
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 module for holding the antenna;
An outer case for housing the antenna and the module;
A wristwatch characterized by comprising:

DESCRIPTION OF SYMBOLS 1 Exterior case 2 Crown 3 Module 4 Antenna 5 Dial 8 Back cover member 10 Sensitivity adjustment device 81 Back cover body 82 Rotating member 83 Locking ring member 100 Wristwatch 813 Antenna index 825 Magnetic sheet 826 Open part 827 Sensitivity index

Claims (6)

A sensitivity adjustment device that adjusts the radio wave transmission / reception sensitivity of an antenna that is housed in an exterior case whose opening is closed by a lid member and can transmit and receive radio signals to and from an external device,
The lid member is
A lid body attached to the opening of the exterior case;
A rotating member disposed at a position covering the antenna and rotatably attached to the lid body;
With
The rotating member includes a shielding portion that prevents transmission of radio waves along the circumferential direction of rotation and an open portion that transmits radio waves, and adjusts a shielded range of the antenna shielded by the shielding portion. Sensitivity adjustment device. 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 member .   The sensitivity adjusting device according to claim 1, wherein the shielding portion is configured by providing a magnetic body on a surface of the rotating member that faces the antenna. The rotating member has a thick part formed thicker than the other part in a part of the circumferential direction of the rotation,
The sensitivity adjusting apparatus according to claim 1, wherein the shielding portion is configured by the thick portion. The sensitivity adjustment device according to any one of claims 1 to 4,
An antenna whose radio wave transmission / reception sensitivity is adjusted by the sensitivity adjustment device;
A module for holding the antenna;
An outer case for housing the antenna and the module;
A wristwatch characterized by comprising:   A lid member for closing the opening of the exterior case;
  A lid body attached to the opening of the exterior case;
  A rotating member rotatably attached to the lid body;
With
  The rotating member includes a shielding unit that prevents transmission of radio waves along a circumferential direction of rotation and an open unit that transmits radio waves.

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