JP2013197786A - Sensitivity adjustment device and radio wave communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensitivity adjustment device capable of adjusting communication sensitivity of an antenna so as to have the sensitivity as usage with a simple mechanism and to provide a wrist watch to which the device is applied.SOLUTION: A dial 5 equipped with a magnetic sheet 52 which prevents transmission of a radio wave by shielding an antenna 8 and an opening 51 through which the radio wave is made to pass is arranged upward of the antenna 8, the antenna 8 is moved by rotating a winding crown 2, positions of the antenna 8 to the magnetic sheet 52 and the opening 51 are changed, thereby adjusting a shielded range of the antenna 8 shielded by the magnetic sheet 52. As a result, radio wave communication sensitivity of the antenna 8 is made possible to be adjusted.

Description

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

In recent years, techniques for transmitting and receiving various types of data (ie, communication), such as exchanging data by wireless methods and synchronizing information between electronic devices such as wristwatches having a wireless communication function, are spreading. .
There is a possibility that a lot of personal information is included in data communicated through such a radio signal. For this reason, in order to protect personal privacy and the like, data communication 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, the purpose of data communication between electronic devices is various, and in addition to the case where communication is performed as close as the electronic devices are brought into contact as in the case of pairing, for example, the user himself / herself wears it. When communicating data between electronic devices that are located slightly apart, such as when communicating various data between a portable terminal device and an electronic device such as a wristwatch, or when the user leaves the hand In some cases, it may be necessary to communicate 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, it is required that the communication sensitivity of radio waves when performing data communication between electronic devices is appropriately switched according to the purpose, application, and situation.

In this regard, in mobile phones, personal computers, and the like, communication sensitivity is switched in a communication-related module such as a receiving circuit.
However, when the communication 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 communication sensitivity of an antenna so as to have a sensitivity according to the application by a simple mechanism, and a radio wave to which the sensitivity adjustment device is applied. The object is to provide a communication device.

In order to solve the above-described problem, a sensitivity adjustment device according to the present invention includes:
A sensitivity adjustment device that adjusts the sensitivity of an antenna that communicates with an external device via a radio signal, and is provided so as to cover an antenna moving means for moving the antenna and a part of a moving range of the antenna. A radio wave shielding member that prevents transmission of radio waves, and moving the antenna by the antenna moving means to change a positional relationship between the antenna and the radio wave shielding member, thereby transmitting and receiving radio waves of the antenna. It is characterized by adjusting the sensitivity.

  According to the present invention, as a technique for adjusting the radio wave communication 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 moving the antenna. Therefore, as compared with the case where the communication sensitivity is switched in a communication-related module such as a receiving circuit, the power consumption required for adjusting the radio wave communication sensitivity of the antenna can be reduced.

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. FIG. 3 is an enlarged cross-sectional view of a main part around the antenna in FIG. 2. It is a perspective view which shows an antenna and the electromagnetic wave control member arrange | positioned around it. It is a principal part perspective view which shows the relationship between a crown and an antenna support body. (A) is a plan view showing a positional relationship between the sensitivity adjustment member and the antenna when the antenna is completely shielded, and (B) is a case where the antenna has the lowest sensitivity. It is the top view which showed the positional relationship of a sensitivity adjustment member and an antenna, (C) is the top view which showed the positional relationship between the sensitivity adjustment member and an antenna when the sensitivity of an antenna will be a moderate state. (D) is the top view which showed the positional relationship of the sensitivity adjustment member and antenna when the sensitivity of an antenna becomes the highest state.

  Hereinafter, a preferred embodiment of a sensitivity adjustment device according to the present invention and a radio communication device including the same will be described with reference to FIGS. 1 to 6. 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 of a wristwatch according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line II-II 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.

  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 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 of the timepiece. Is formed.
The exterior case 1 has an opening on the front side (upper side in FIG. 2) and an opening on the back side (lower side in FIG. 2). A windshield member (not shown) formed of a material such as transparent glass is attached to the opening on the surface side of the outer case 1 so as to close the opening on the surface side through a waterproof ring or the like. On the other hand, a back cover member (not shown) is attached to the opening on the back side of the exterior case 1 so as to close the opening on the back side through a waterproof ring or the like.

Operation buttons 3 for performing various operations on the wristwatch 100 are provided on the side of the outer case 1 and at a position of the wristwatch 100 in the 4 o'clock direction.
Further, a through hole 12 (see FIG. 2) penetrating into the exterior case 1 is formed on the side surface of the exterior case 1 and at a position of the wristwatch 100 in the 3 o'clock direction.
In the present embodiment, the operation button 3 is provided at the 4 o'clock position on the wristwatch 100 and the through hole 12 is formed on the side surface of the wristwatch 100 at the 3 o'clock direction. And the position where the through-hole 12 is provided is not limited to this. For example, the through hole 12 may be provided at a 9 o'clock position or a 4 o'clock position.

As shown in FIG. 2, a hollow cylindrical member 13 is inserted into the through hole 12 from the outside to the inside of the exterior case 1. A flange portion 131 having an outer diameter larger than the inner diameter of the through hole 12 is formed at one end of the cylindrical member 13, and this flange portion 131 is externally attached when the cylindrical member 13 is inserted into the through hole 12. It protrudes outside the case 1.
A circumferential groove is formed along the inner peripheral surface of the flange portion 131 of the flange portion 131. A seal ring 14 that is a ring-shaped sealing member such as an O-ring is fitted in the circumferential groove. The seal ring 14 is formed of, for example, various resins. The material forming the seal ring 14 is not limited to this. Moreover, the circumferential groove and the seal ring 14 should just be provided somewhere in the axial direction of the cylindrical member 13, and the position etc. are not specifically limited.

On the side of the outer case 1 where the through-hole 12 is provided, a side surface of the outer case 1 is provided through the inside and outside, and a rotation operation unit that rotates the antenna support 7 described later. A certain crown 2 is provided.
In this embodiment, the crown 2 moves the antenna 8 to change the position of the antenna 8 with respect to the shielding part (magnetic sheet 52 described later in this embodiment) and the opening part (opening 51 described later in this embodiment). The antenna 8 functions as an antenna moving unit that adjusts the sensitivity of the antenna 8 by adjusting the shielded range of the antenna 8 that is shielded by the shielding part (magnetic sheet 52).
The crown 2 includes a shaft member 21 and 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.

The shaft member 21 is inserted into the through-hole 12 through the cylindrical member 13 and is inserted from the outside to the inside of the exterior case 1. The shaft member 21 is formed so that the outer diameter is substantially equal to the inner diameter of the cylindrical member 13 in the through hole 12, and the outer peripheral surface of the shaft member 21 is connected to the seal ring 14 provided in the circumferential groove of the flange portion 131. In close contact.
When the crown 2 is rotated, the shaft member 21 slides in the circumferential direction with its outer peripheral surface being in close contact with the seal ring 14. Thereby, the airtightness between the shaft member 21 and the cylindrical member 13 of the exterior case 1 is ensured.

Further, a groove portion 221 is formed along the outer periphery of the shaft member 21 on the inner side of the crown top 22 (that is, the side facing the side surface of the outer case 1), and the flange portion 131 of the tubular member 13 is the groove portion. 221 is housed in the 221.
In addition, you may comprise so that the airtightness between the cylindrical member 13 and the crown top 22 may be ensured by providing the seal ring which is not illustrated in the back | inner side of the groove part 221 or the outer peripheral surface of the flange part 131.

  A support driving gear (pinion) 25 (see FIG. 3) for rotating an antenna support 7 described later is provided in the vicinity of the insertion side end of the shaft member 21. The support drive gear 25 is fixed to the shaft member 21 by press fitting or the like.

A module 4 formed in a substantially cylindrical shape is disposed inside the outer case 1. The module 4 is one in which various components are incorporated in a housing (not shown) formed of, for example, resin. The shape of the module 4 is not limited to a cylindrical shape.
A circuit board 41 on which various electronic components are mounted is disposed below the module 4.
In addition, a clock movement 6 for moving the hands 62 of the wristwatch 100 is disposed in the module 4. The timepiece movement 6 includes, for example, a driving motor and a gear train mechanism that are not shown.

At a position corresponding to the crown 2 in the module 4 (that is, a position corresponding to the approximately 3 o'clock direction of the wristwatch), a cylindrical shape having a through hole 42a penetrating in the thickness direction of the module 4 (vertical direction in FIGS. 2 and 3). A shaft support portion 42 is provided. In addition, a recess 41 a formed in the thickness direction of the circuit board 41 (vertical direction in FIGS. 2 and 3) is provided at a position corresponding to the through hole 42 a of the shaft support portion 42 in the circuit board 41. The recess 41a may be a hole that penetrates in the thickness direction of the circuit board 41.
A leaf spring 44 that is in electrical contact with the circuit board 41 is disposed on the bottom surface of the recess 41a. In addition, an antenna terminal portion 45 is provided at the periphery of the opening of the through hole 42a, and a contact spring 46 in which the antenna terminal portion 45 is in contact with an end portion on one end side is provided inside the through hole 42a. Is arranged.

As shown in FIGS. 2 and 3, in this embodiment, on the upper side of the module 4 (the surface side in the wristwatch 100), the position corresponding to the wristwatch at about 3 o'clock in the peripheral portion of the module 4 (the right side position in FIG. 1) ) Is provided with a substantially disk-shaped antenna support 7.
A rotating shaft 71 is attached to the antenna support 7 by press fitting or the like at substantially the center (circular center) of the disk-shaped antenna support 7.
As shown in FIG. 3, the rotating shaft 71 includes a hollow cylindrical shaft main body 711 and a conductor shaft 712 inserted through an insulating cover 713 at the substantially center of the shaft main body 711. The conductor shaft 712 and the insulating cover 713 are formed longer than the shaft main body 711, and the conductor shaft 712 penetrates the shaft support portion 42 so that the tip portion thereof is in contact with the bottom surface of the recess 41 a of the circuit board 41. It has become. The shaft main body 711, the conductor shaft 712, and the insulating cover 713 are preferably formed as an integral part.
A shaft side gear (pinion) 72 (see FIG. 3) is provided in the vicinity of the end of the rotating shaft 71 on the mounting side. The shaft side gear 72 is fixed to the rotating shaft 71 by, for example, press fitting.

The rotating shaft 71 of the antenna support 7 is inserted into the through hole 42a and the concave portion 41a from above, and is supported by the through hole 42a and the concave portion 41a.
As shown in FIG. 3, the rotating shaft 71 has a tip end portion of the conductor shaft 712 in a state where the rotating shaft 71 is inserted to a position where the lower side surface of the shaft side gear 72 contacts the upper end surface of the shaft support portion 42. Contacts the leaf spring 44 on the bottom surface of the recess 41a. At this time, the tip of the shaft main body 711 is in contact with the upper end of the spring 46 (that is, the end opposite to the side in contact with the antenna terminal portion 45).

  In addition, the rotary shaft 71 is inserted into and supported by the through hole 42 a of the shaft support portion 42 and the recess 41 a of the circuit board 41, and the shaft side gear 72 provided on the shaft main body 711 is connected to the crown 2. The rotating shaft 71 rotates around the axis by rotating the crown 2, and the antenna support 7 rotates around the rotating shaft 71 (circular center). It is configured to be possible.

A substantially semicircular antenna 8 having an arc-shaped outer edge portion is placed on the upper surface of the antenna support 7 (the upper surface in FIGS. 2 and 3 and the surface on the viewing side of the wristwatch 100). The antenna 8 is a small antenna such as a chip, and is arranged such that an arc-shaped outer edge portion is along the outer periphery of the antenna support 7 and is fixed to the upper surface of the antenna support 7 with an adhesive, an adhesive tape, or the like. Yes.
The antenna 8 is not limited to the case where it is attached to the upper surface of the antenna support 7. For example, it is good also as a structure which provides a recessed part in a part of upper surface of the antenna support body 7, and the antenna 8 is inserted in this recessed part. Further, the shape and arrangement of the antenna 8 and the antenna support 7, the position of the antenna 8 on the antenna support 7, and the like are not limited to those illustrated here, but may be other shapes and arrangements.

  The antenna 8 can communicate with an external device via a wireless signal, and performs communication according to a standard such as Bluetooth (registered trademark). Note that the communication standard of the antenna 8 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 8 should just be a small thing, and a kind and shape are not specifically limited. As will be described later, in the present embodiment, as the antenna 8, a radio wave communication sensitivity capable of performing signal communication with a device existing within a range of about 5 m at the maximum is applied. The radio wave communication sensitivity of the antenna 8 is not limited to this, and it may be one that can perform signal communication with a device further away when the sensitivity is maximized.

The antenna 8 is electrically connected to a radio wave communication control circuit (not shown) on the circuit board 41.
That is, the terminal 81 (“terminal 81a” in FIG. 3) on one side of the antenna 8 is connected to the shaft main body 711 of the rotating shaft 71 via the lead electrode 82, and the spring 46 is in contact with the tip of the shaft main body 711. Is electrically connected to the antenna terminal portion 45 on the circuit board 41.
Further, the terminal 81 on the other side of the antenna 8 (“terminal 81b” in FIG. 3) is connected to the conductor shaft 712 of the rotating shaft 71 through the wiring 83, and the tip end portion of the conductor shaft 712 is in contact with the leaf spring 44. Thus, the circuit board 41 is electrically connected.
In the present embodiment, the antenna 8 and the radio communication control circuit itself (not shown) are always at the maximum radio communication sensitivity (for example, radio communication sensitivity capable of radio wave communication within a range of about 5 m from the antenna 8 in this embodiment). Is maintained, and the radio wave communication sensitivity is adjusted by the mechanical configuration by changing the shielded range of the antenna 8 by the sensitivity adjusting device 10 (see FIG. 1).

A dial plate 5 made of, for example, resin is disposed in the outer case 1 and between the module 4 and the windshield member. In addition to the analog dial 5, a liquid crystal display unit or the like that displays numbers, characters, and the like in a digital manner may be provided between the windshield member and the module 4. Moreover, the material which forms the dial 5 is not specifically limited, For example, you may form with the metal material etc.
As shown in FIG. 2, a through hole 5a is provided in the substantially central portion of the dial 5, and the shaft member 61 is directed from the inside of the timepiece movement 6 to the outside (upper side in FIG. 2) through this through hole. It protrudes. A pointer 62 (second hand, minute hand, hour hand in this embodiment) is supported on the tip of the shaft member 61 protruding above the dial plate 5.
Further, a parting member 17 formed in an annular shape is disposed on the dial plate 5, and a bezel that is formed in an annular shape and fitted in the exterior case 1 is provided outside the parting member 17. ing.

In the present embodiment, the dial plate 5 is disposed above the antenna 8 and includes a shielding portion that shields the antenna 8 and prevents transmission of radio waves and an open portion that transmits radio waves.
That is, a part of the position of the dial 5 in the 3 o'clock direction and a substantially circular portion corresponding to the position where the antenna support 7 is disposed is a sensitivity adjustment unit 50 (indicated by a one-dot chain line in FIG. 1). It has become. A substantially semicircular opening 51 is formed in almost half of the sensitivity adjusting unit 50 (in this embodiment, half on the outer peripheral side of the dial 5 as shown in FIG. 1). 51 becomes an open part which permeate | transmits an electromagnetic wave.
Further, on the back surface side of the sensitivity adjustment portion 50 in the dial plate 5 where the opening 51 is not provided (in the present embodiment, as shown in FIG. 1, half of the central side of the dial plate 5). A substantially semicircular magnetic sheet 52 is adhered, and this magnetic sheet 52 serves as a radio wave shielding member that shields the antenna 8 and prevents the transmission of radio waves. The magnetic sheet 52 is a magnetic body obtained by processing a magnetic material such as ferrite or a material containing magnetic powder into a sheet shape.
The magnetic sheet 52 absorbs the radio wave to be incident on the antenna 8 by the magnetic loss of the magnetic material and prevents the transmission of the radio wave.

In addition, a ring-shaped radio wave regulating member 53 is provided on the back side of the dial 5 and on the peripheral edge of the sensitivity adjustment unit 50. The radio wave regulating member 53 is made of a radio wave shielding material that prevents radio wave transmission, such as a magnetic material such as ferrite or a material containing magnetic powder, and is disposed around the antenna 8.
In this manner, by arranging the radio wave regulating member 53 around the antenna 8 so as to surround the antenna 8, the incident direction of the radio wave incident on the antenna 8 is upward (see FIG. 4). (Upward direction, etc., viewing side of the wristwatch 100).
In the present embodiment, an example in which the radio wave regulating member 53 is provided integrally with the magnetic sheet 52 (radio wave shielding member) is illustrated, but the configurations of the radio wave regulating member 53 and the magnetic sheet 52 are shown here. It is not limited to the example. The radio wave regulating member 53 and the magnetic sheet 52 may be formed separately, and the radio wave regulating member 53 may be disposed at a position surrounding the antenna 8 on the antenna support 7. The radio wave regulating member 53 may be disposed on the module 4. Thus, the antenna support 7 and the antenna 8 supported by the antenna support 7 may be disposed at a position surrounding the antenna support 7. Further, the radio wave regulating member 53 and the magnetic sheet 52 may be provided integrally with the dial plate 5 on the lower surface of the dial plate 5.

As shown in FIG. 6 (A) to FIG. 6 (D) and the like, the surface of the antenna 8 is provided with a pattern or design such as color coding so that the substantially semicircular antenna 8 is radially divided into three. When the antenna 8 is positioned below the opening 51, the pattern can be viewed from the opening 51. That is, when the entire antenna 8 is exposed from the opening 51, the entire pattern divided into three is visible from the opening 51. Then, as the position of the antenna 8 turns from the opening 51 side to the side covered with the magnetic sheet 52, a part of the pattern is hidden and cannot be seen, and the entire antenna 8 is disposed below the magnetic sheet 52. Then, the pattern cannot be visually recognized from the opening 51.
Thus, the user can easily confirm the shielded range of the antenna 8 visually from the viewing side of the wristwatch 100 according to the appearance of the pattern from the opening 51.

As described above, the antenna support 7 rotates around the rotation shaft 71 below the sensitivity adjustment unit 50 of the dial 5 by operating the crown 2 which is an antenna moving means (see FIG. 5). Thereby, the positions of the magnetic sheet 52 constituting the shielding part of the sensitivity adjusting part 50 and the opening part 51 constituting the opening part are changed, and the shielded range of the antenna 8 covered by the shielding part can be adjusted.
Thus, in this embodiment, the sensitivity adjustment apparatus 10 is comprised by the dial 5 provided with the sensitivity adjustment part 50, and the crown 2 which is an antenna moving means.

  Adjustment of the shielded range of the antenna 8 will be described with reference to FIGS. 5 and 6A to 6D. 6A to 6D show only the sensitivity adjustment unit, the antenna 8, and the antenna support 7 supporting the same in the wristwatch 100. FIG.

In the present embodiment, as described above, the radio wave regulating member 53 is disposed so as to surround the antenna 8, and the incident direction of the radio wave to the antenna 8 is limited to the upward direction. In this state, as shown in FIG. 5, the crown 2 is operated to rotate, and as shown in FIG. 6 (A), the antenna 8 is disposed in the shielding portion (that is, the portion to which the magnetic sheet 52 is attached). When the antenna support 7 is rotated so as to be below the position where the watch is positioned (that is, the position on the center side of the dial in the wristwatch 100), the upper side of the antenna 8 is completely covered by the magnetic sheet 52. For this reason, the radio wave to be incident on the antenna 8 is absorbed by the magnetic sheet 52, and the antenna 8 becomes unable to receive the radio wave.
Further, when the crown 2 is rotated, as shown in FIG. 6B, about 2/3 of the left side of the antenna 8 (that is, about 2/3 of the three-divided pattern) is the shielding portion (that is, the magnetic sheet). When the antenna support 7 is rotated so that it is below the position where the position 52 is attached (that is, the position on the center side of the dial in the wristwatch 100), two thirds of the antenna 8 is obtained. The degree is covered by the magnetic sheet 52. (In other words, the shielded range of the antenna 8 is widened). For this reason, most of the radio waves entering the antenna 8 are absorbed by the magnetic sheet 52, and the radio wave communication sensitivity of the antenna 8 is lowered.
Further, when the crown 2 is rotated, as shown in FIG. 6C, about 1/3 of the left side of the antenna 8 (that is, about 1/3 of the three-divided pattern) is the shielding portion (that is, the magnetic sheet 52). When the antenna support 7 is rotated so that it is below the position where the part is attached (that is, the position in the 6 o'clock direction in the wristwatch 100), about one third of the antenna 8 is magnetic. Covered by the sheet 52, about two thirds of the antenna 8 is exposed from the opening 51. For this reason (that is, the shielded range of the antenna 8 becomes narrow), a part of the radio wave entering the antenna 8 is absorbed by the magnetic sheet 52, and the radio wave communication sensitivity of the antenna 8 becomes medium.
Further, when the crown 2 is rotated, as shown in FIG. 6D, the antenna 8 is located below the opening 51 (that is, the open portion where the magnetic sheet 52 is not attached) (that is, at 3 o'clock in the wristwatch 100). When the antenna support 7 is rotated so as to come to the position of the antenna 8, the entire antenna 8 is exposed from the opening 51, and the upper part is not covered by the magnetic sheet 52 (that is, there is no shielded range of the antenna 8). ) For this reason, the radio wave entering the antenna 8 easily enters the antenna 8, and the radio wave communication sensitivity of the antenna 8 is increased.

  In addition, the wristwatch 100 includes, for example, a control unit including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, a radio wave communication control circuit unit that controls radio wave communication, A time measuring circuit section that performs time correction and the like, an oscillation circuit section, and a pointer driving circuit section that drives the pointer 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 communication sensitivity of the antenna 8 by adjusting the shielded range of the antenna 8 with the sensitivity adjusting device 10.
In other words, the wristwatch 100 can implement a plurality of communication modes (“pairing mode”, “data synchronization mode”, “terminal search mode / thing-forgetting prevention mode” described later in this embodiment) realized under different radio wave communication sensitivities. Thus, the sensitivity adjustment device 10 adjusts the shielded range of the antenna 8 so that the radio wave communication sensitivity suitable for each of these communication modes 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 communication 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 8 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 communication sensitivity of the antenna 8 is lowered to the extent that radio wave communication is possible.
For this reason, in the present embodiment, when communication is performed in the pairing mode, a portion where the antenna 8 is approximately two-thirds is attached with the magnetic sheet 52 that is the shielding portion of the sensitivity adjustment portion 50 of the dial 5. The antenna support 7 is rotated so as to be positioned below the antenna 8 and adjusted so that the radio wave communication sensitivity of the antenna 8 is lowered.
Specifically, when the user rotates the crown 2, the antenna support 7 is rotated until approximately two-thirds of the antenna 8 is positioned below the magnetic sheet 52, and the shielding portion (magnetic sheet 52 Is adjusted so that the portion to which approximately 2/3 of the antenna 8 is covered is about 2/3 (see FIG. 6B). At this time, the user can easily visually confirm whether or not the antenna 8 has moved to a desired sensitivity position by checking the pattern on the surface of the antenna 8 exposed from the opening 51. .
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) 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 8 of the wristwatch 100 receives the response signal, the response signal is transmitted to the control unit. Then, the control unit registers the terminal device as a terminal device capable of data communication with 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.
Further, in a state where the radio wave communication sensitivity of the antenna 8 is low (that is, a state where the magnetic sheet 52 covers about two-thirds above the antenna 8), pairing is appropriately established with the target terminal device. If it is not possible (that is, if a message indicating that pairing has not been established or the like is displayed), the user rotates the crown 2 and the pattern on the surface of the antenna 8 exposed from the opening 51 is displayed. The antenna support 7 is rotated to a position where the portion is wide (for example, a position where about two-thirds of the pattern is exposed from the opening 51), and the range of the antenna 8 exposed from the opening 51 is adjusted to be wide. 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 assuming synchronization of data with a terminal device located at a relatively short distance of the wristwatch 100 (for example, the distance from the antenna 8 is within a range of about 1 to 2 m). .

When performing communication in the data synchronization mode, the radio wave communication sensitivity of the antenna 8 is moderate so that radio wave communication is possible only when the wristwatch 100 and the terminal device are relatively close to each other. It is preferable to adjust so that.
For this reason, in the present embodiment, when communication is performed in the data synchronization mode, about one third of the antenna 8 is attached with the magnetic sheet 52 that is the shielding portion of the sensitivity adjustment portion 50 of the dial 5. The antenna support 7 is rotated until it is located below the part, and the radio wave communication sensitivity of the antenna 8 is adjusted to be medium.
Specifically, when the user rotates the crown 2, the antenna support 7 is rotated until approximately one third of the antenna 8 is positioned below the magnetic sheet 52, and the shielding portion (the magnetic sheet 52 is Adjustment is made so that the affixed part) is positioned to cover approximately one third of the antenna 8 (see FIG. 6C). Also in this case, the user can easily visually confirm whether or not the antenna 8 has moved to a position where desired sensitivity is obtained by checking the pattern on the surface of the antenna 8 exposed from the opening 51. it can.
As a result, the wristwatch 100 is able to communicate radio waves with a terminal device in which the antenna 8 is located at a slightly separated distance, for example, data communication with a mobile phone worn by the user. By performing the above, mutual data can be synchronized.

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

Both of these are communications performed with a terminal device that has already been paired with the wristwatch 100 and are scheduled to communicate with a terminal device at a distance. Yes.
For this reason, in the present embodiment, when communication is performed in the terminal search mode or the left-behind item prevention mode, the antenna support 7 is rotated so that the entire antenna 8 is exposed from the opening 51 of the dial plate 5. Adjustment is performed so that the radio wave communication sensitivity of the antenna 8 becomes the highest.
Specifically, when the user rotates the crown 2, the antenna support 7 is rotated until the entire pattern on the surface of the antenna 8 is exposed and visible from the opening 51, and the entire antenna 8 is It adjusts so that it may be in the downward position of the opening part 51 (part to which the magnetic sheet 52 is not stuck) (refer FIG.6 (D)).
Thereby, in the terminal search mode, for example, a signal requesting a response is transmitted from the antenna 8 of the wristwatch 100 to the paired terminal device within a range of about 5 m from the wristwatch 100, and the terminal device When a signal is received and a response signal is transmitted to the wristwatch 100, the user is notified of this by a sound such as a buzzer or a blinking light. In addition, for example, in the lost-item prevention mode, a signal requesting a response is transmitted from the antenna 8 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, the range in which the antenna 8 can perform radio wave communication). Then, this is notified to the user by a sound such as a buzzer or a blinking light.

If the user does not want to accept any data transmission / reception via the antenna 8, the user rotates the crown 2 to rotate the antenna support 7, and the antenna 8 as a whole is shielded (magnetic sheet 52). Is adjusted so that it is positioned below (the part to which is attached) (see FIG. 6A).
As a result, all radio waves entering the antenna 8 are blocked, and communication cannot be performed.

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 communication sensitivities. Various communications according to the user's purpose and application can be performed.
Then, as a method for adjusting the radio wave communication sensitivity of the antenna 8 to a sensitivity suitable for these communication modes, a mechanical configuration in which the antenna support 7 is rotated to adjust the shielded range of the antenna 8 covered by the shielding portion. Therefore, the power consumption required for adjusting the radio wave communication sensitivity of the antenna 8 can be reduced as compared with the case where the radio wave communication sensitivity is switched in a communication-related module such as a radio wave receiver circuit.
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 this embodiment has a sensitivity adjustment unit 50 disposed above the antenna 8. Is provided with a sensitivity adjustment device 10 constituted by a crown 5 as an antenna moving means for rotating and moving an antenna 8 supported by an antenna support 7. Radio communication sensitivity can be adjusted. For this reason, it is possible to reduce power consumption as compared with the case where radio communication sensitivity is switched in a communication-related module, and it is not necessary to provide a large battery or the like, so that the apparatus can be reduced in size and weight. .
Further, by rotating the antenna support 7 that supports the antenna 8, the positions of the shielding portion and the opening 51 provided on the dial 5 and the antenna 8 are adjusted, and the radio wave communication sensitivity of the antenna 8 is adjusted. Therefore, it is possible to adjust the sensitivity suitable for the communication mode without newly providing a member for adjusting the radio wave communication sensitivity, and to realize the simplification of the device configuration and the reduction in size and weight. Can do.
Moreover, since the shielding part is configured by attaching a magnetic sheet 52, which is a magnetic material, to the back side of the dial 5, the existing standard dial 5 can be easily used, and the production cost can be reduced. It can be kept low.
Further, since the radio wave regulating member 53 formed of a radio wave shielding material is disposed around the antenna 8, the incident direction of the radio wave incident on the antenna 8 can be limited to the upward direction (viewing side of the wristwatch 100). The antenna communication sensitivity can be adjusted more effectively by the sensitivity adjustment device 10.

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

  For example, in the present embodiment, the case where the shielding portion is the magnetic sheet 52 attached to the back surface of the dial 5 has been described. However, the shielding portion is limited to a case where the shielding portion is configured by a sheet-like material such as the magnetic sheet 52. Not. For example, the shielding portion may be formed by embedding a magnetic material in a part of the sensitivity adjustment portion 50 of the dial 5.

Further, in the present embodiment, a case has been described in which the portion of the dial 5 on which the magnetic sheet 52 that is a magnetic material is affixed serves as a shielding portion, and the opening 51 to which the magnetic sheet 52 is not affixed serves as an open portion. However, the configuration of the shielding part and the opening part is not limited to this.
For example, the entire dial plate 5 may be formed of a magnetic material, and all portions other than the opening 51 may be shielding portions. Further, when the entire dial plate 5 is formed of a magnetic material, the shielding portion and the open portion may be configured by changing the thickness of the dial plate 5. That is, in this case, the thick part is the shielding part and the thin part is the open part.

In this embodiment, a part of the dial plate 5 is used as the sensitivity adjustment unit 50, and the magnetic sheet 52 is arranged at a part of the back side of the dial plate 5 at the 3 o'clock position in the wristwatch 100 as an example. However, the range in which the magnetic sheet 52 is provided is not limited to this, and the magnetic sheet 52 may be arranged in a wider range.
Further, when the dial plate 5 itself is formed of a material such as a magnetic material that prevents transmission of radio waves, it is not necessary to provide the magnetic sheet 52 separately.
Moreover, in this embodiment, although the case where the dial plate 5 and the magnetic sheet 52 and the radio wave restricting member 53 are separated is taken as an example, when the dial plate 5 itself is formed of a magnetic body or the like, The dial plate 5 and the radio wave regulating member 53 may be integrally formed.

  In the present embodiment, the case where the magnetic sheet 52 that is a magnetic material is arranged in the shielding portion and the transmission of the radio wave is prevented by absorbing the radio wave due to the magnetic loss of the magnetic material has been described. Any structure can be used as long as it can prevent transmission, and the configuration is not limited to that which absorbs radio waves due to magnetic loss.

Further, in the present embodiment, by providing a pattern serving as an index of sensitivity on the surface of the antenna 8 so that the pattern can be viewed from the opening 51 which is an open portion, the user can easily detect the sensitivity of the antenna 8. Although the configuration is such that the state can be confirmed, it is not an essential configuration to provide a pattern as a sensitivity index on the surface of the antenna 8.
In the case where the surface of the antenna 8 is not provided with a pattern or the like that is an index of sensitivity, or as described above, the open portion is configured other than the opening 51 (for example, a thin portion of a magnetic material), and the antenna 8 When configured so as not to be exposed to the outside even when located at the position corresponding to the open portion, it is preferable to separately provide a sensitivity index on the surface of the dial plate 5 so that the sensitivity of the antenna 8 can be visually confirmed.

  Moreover, in this embodiment, although it comprised so that the antenna support body 7 might be rotated by operating the crown 2, the structure which rotates the antenna support body 7 is not limited to this. For example, an operating member (antenna moving means) for rotating the antenna support 7 may be provided separately from the crown 2.

In this embodiment, only the point that the crown 2 has the function of rotating the antenna support 7 has been described, but the function of the crown 2 is not limited to this.
For example, the crown 2 can be pulled out in a plurality of stages, meshed with different gears in the outer case 1 according to the position where the crown 2 is pulled out, and various operations other than the rotation operation of the antenna support 7 can be performed. It may be possible. In this case, for example, in a state where the crown 2 is pulled out by one stage, the gear provided on the crown 2 can be connected to the shaft side gear 72 of the antenna support 7 to rotate the antenna support 7. When the crown is pulled out in two stages, the gear wheel provided on the crown 2 is connected to a part of the train wheel that rotates the minute hand in the module 4 and when the crown 2 is rotated, the rotational force causes the train wheel to rotate the minute hand. The minute hand position can be adjusted and the time can be adjusted. When the crown 2 is pulled out in three stages, the gear provided on the crown 2 is connected to the date indicator in the module 4 and the crown 2 is rotated. Rotate the date and adjust the date.

  In this embodiment, the case where the user manually rotates the crown 2 to rotate the antenna support 7 that supports the antenna 8 and adjusts the sensitivity is illustrated. However, the sensitivity adjustment is performed manually. It is not limited to twice. For example, when a communication mode that includes a motor that rotates the antenna support 7 that supports the antenna 8 and that requires adjustment of the reception sensitivity of the antenna 8 is selected by the operation button 3 or the like, it is selected by operating the motor. Alternatively, the antenna support 7 may be configured to automatically rotate until the antenna 8 is arranged at a position suitable for the communication mode.

In the present embodiment, when communication is performed in the “pairing mode”, about two-thirds of the antenna 8 is positioned below the magnetic sheet 52 that is the shielding portion, and communication is performed in the “data synchronization mode”. In some cases, about one-third of the antenna 8 is positioned below the magnetic sheet 52 that is a shielding portion, and when performing communication in the “terminal search mode / thing left behind prevention mode”, the entire antenna 8 is an open portion. When the antenna 8 is placed at a position exposed from the opening 51 and communication with radio waves is not desired, the antenna 8 is placed under the magnetic sheet 52 that is a shielding portion so that the radio communication sensitivity of the antenna 8 is divided into four levels. However, the adjustment of the radio wave communication sensitivity of the antenna 8 is not limited to four stages.
For example, by adjusting the positional relationship between the shielding portion and the antenna 8 in stages, the state in which the entire antenna 8 is shielded, the state in which the antenna 8 is partially shielded, and the state in which the entire antenna 8 is not shielded are further finely adjusted. You may be able to do it. In this case, when the communication is performed in the “pairing mode”, the pairing is not performed in a state where about one third of the antenna 8 is exposed from the opening 51. The radio wave communication sensitivity of the antenna 8 can be increased stepwise until it is established.
Further, the number of adjustable steps may be reduced, for example, the adjustment of the radio wave communication sensitivity of the antenna 8 may be adjusted in two steps: a state where communication by radio waves is possible and a state where communication is impossible.

In the present embodiment, the antenna 8 and the circuit board 41 are electrically connected via the rotating shaft 71 of the antenna support 7. However, the antenna 8 and the circuit board 41 are electrically connected. The structure to perform is not limited to this.
For example, two ring-shaped terminal portions respectively connected to the antenna 8 are provided on the rear surface of the antenna support 7 along the outer peripheral edge of the antenna support 7 so as not to contact (interfere) with each other. A spring connector or the like is interposed between the terminal portion and the antenna terminal of the circuit board 41. The antenna 8 and the circuit board 41 may be electrically connected by sliding the connector to the ring-shaped terminal portion.

  In the present embodiment, the antenna 8 is supported by a disk-shaped antenna support. However, it is not essential to provide the antenna support. For example, the antenna 8 is used as a case or the like. The sensitivity may be adjusted by housing and moving the case by the antenna moving means.

In this embodiment, the antenna 8 is supported by a disk-shaped antenna support, and the sensitivity adjustment is performed by rotating the antenna support. However, the movement of the antenna 8 is rotational movement. It is not limited to.
For example, the shielding part and the opening part are arranged in a straight line, the antenna 8 is moved linearly, the position of the antenna 8 with respect to the shielding part and the opening part is changed, and the antenna 8 shielded by the shielding part It is good also as a structure which adjusts the to-be-shielded range.

  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.

In the present embodiment, the case where the radio communication device is the wristwatch 100 is illustrated, but the radio communication device is not limited to the wristwatch.
For example, the present invention can be widely applied to various electronic devices configured to perform radio wave communication such as a mobile terminal device such as a mobile phone, a PDA, a pedometer, and a heart rate monitor.

Although several embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof. .
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
A sensitivity adjustment device that adjusts the sensitivity of an antenna that communicates with an external device via a wireless signal,
An antenna moving means for moving the antenna;
A radio wave shielding member which is provided so as to cover a part of the moving range of the antenna and prevents transmission of radio waves;
Have
A sensitivity adjustment apparatus for adjusting radio wave transmission / reception sensitivity of the antenna by moving the antenna by the antenna moving means and changing a positional relationship between the antenna and the radio wave shielding member.
<Claim 2>
The sensitivity adjustment apparatus according to claim 1, wherein an opening that exposes a portion of the antenna that is not covered by the shielding member is provided.
<Claim 3>
A disk-shaped antenna support for supporting the antenna;
The sensitivity adjustment apparatus according to claim 1 or 2, wherein the antenna moving means is configured to move the antenna by rotating the antenna support with the circle center as a rotation center.
<Claim 4>
The sensitivity adjustment device according to any one of claims 1 to 3,
An antenna whose communication sensitivity is adjusted by the sensitivity adjustment device;
A radio communication device characterized by comprising:

DESCRIPTION OF SYMBOLS 1 Exterior case 2 Crown 4 Module 5 Dial 7 Antenna support body 8 Antenna 10 Sensitivity adjustment device 25 Support body drive gear 41 Circuit board 50 Sensitivity adjustment part 51 Opening part 52 Magnetic sheet 53 Radio wave regulation member 71 Rotating shaft 72 Shaft side gear 100 Watches

Claims (4)

A sensitivity adjustment device that adjusts the sensitivity of an antenna that communicates with an external device via a wireless signal,
An antenna moving means for moving the antenna;
A radio wave shielding member which is provided so as to cover a part of the moving range of the antenna and prevents transmission of radio waves;
Have
A sensitivity adjustment apparatus for adjusting radio wave transmission / reception sensitivity of the antenna by moving the antenna by the antenna moving means and changing a positional relationship between the antenna and the radio wave shielding member.   The sensitivity adjustment apparatus according to claim 1, wherein an opening that exposes a portion of the antenna that is not covered by the shielding member is provided. A disk-shaped antenna support for supporting the antenna;
The sensitivity adjustment apparatus according to claim 1 or 2, wherein the antenna moving means is configured to move the antenna by rotating the antenna support with the circle center as a rotation center. The sensitivity adjustment device according to any one of claims 1 to 3,
An antenna whose communication sensitivity is adjusted by the sensitivity adjustment device;
A radio communication device characterized by comprising:

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