JP4608916B2 - Watches - Google Patents

Description

The present invention relates to a wristwatch including a device called wireless ID (RFID), which wirelessly transmits and receives data by electromagnetic induction.

Conventionally, there is a wristwatch in which an RFID module having an antenna coil and an IC chip mounted on a substrate is incorporated in a wristwatch case, and data is transmitted and received wirelessly by electromagnetic induction.
JP 2000-509813 A

  However, in the conventional wristwatch, various electronic components necessary for the watch function are incorporated in the watch case, and therefore, various electronic components, that is, conductive components are swirled by the magnetic flux generated in the antenna coil of the RFID module. There is a problem in that current is generated, thereby causing loss of magnetic flux and lowering reception sensitivity.

The problem to be solved by the present invention is to provide a wristwatch capable of preventing loss of magnetic flux due to eddy current generated in a conductive part such as an electronic part and improving reception sensitivity.

In order to solve the above problems, the present invention includes the following components.
As shown in FIGS. 1 to 3, the invention according to claim 1 is provided with a watch glass and the watch glass attached to the upper part, and an annular protrusion is provided on the lower side of the outer periphery of the lower face of the watch glass. A wristwatch case, a soft magnetic material provided on the upper surface of the annular projection of the wristwatch case, an antenna coil and an RFID chip, and the soft magnetic member on the upper surface of the annular projection of the wristwatch case. And a ring-shaped substrate disposed through the watch.

As shown in FIG. 4, the invention according to claim 2 is a watch case in which a watch glass and the watch glass are mounted on the upper portion and provided with an annular projection located below the outer periphery of the lower surface of the watch glass. An antenna coil and an RFID chip, a ring-shaped substrate disposed on the upper surface of the annular projection of the watch case, and a soft magnetic material provided on the lower surface of the annular projection of the watch case And a wristwatch characterized by comprising:

The invention according to claim 3 is characterized in that a parting portion is provided on an outer peripheral portion of the lower surface of the watch glass, and the ring-shaped substrate is arranged corresponding to the lower surface of the parting portion. The wristwatch according to 1 or 2.

The invention according to claim 4 is the magnetic sheet according to any one of claims 1 to 3 , wherein the soft magnetic material is a magnetic sheet obtained by dispersing and blending a metal magnetic powder in a resin to form a sheet. It is a wristwatch.

According to the first aspect of the present invention, the antenna coil and the RFID chip are provided on the upper surface of the annular projection of the wristwatch case provided on the lower side of the outer periphery of the lower surface of the watch glass. Since a magnetic flux is generated in the antenna coil during communication, an eddy current is generated in a conductive component such as an electronic component required for a wristwatch and the magnetic flux is lost. Can be prevented by the soft magnetic material, thereby improving the reception sensitivity. In addition, since the antenna coil is arranged in the lower peripheral part of the watch glass, the antenna coil can be brought closer to the outer surface of the wristwatch, thereby shortening the communication distance, thereby also improving the reception sensitivity. Can be increased.

According to the second aspect of the present invention, the antenna coil is formed on the upper surface of the annular projection of the wristwatch case provided on the lower side of the outer periphery of the lower surface of the watch glass, and the RFID chip is provided to form a ring shape. In the same manner as in the first aspect of the present invention, when magnetic flux is generated in the antenna coil during communication, electrical conductivity such as electronic components necessary for a wristwatch is provided. The soft magnetic material can prevent the magnetic flux from being lost due to the generation of eddy currents in the parts having the characteristics, thereby improving the reception sensitivity. In addition, since the antenna coil is arranged in the lower peripheral part of the watch glass, the antenna coil can be brought closer to the outer surface of the wristwatch, thereby shortening the communication distance, thereby also improving the reception sensitivity. Can be increased.

(Embodiment 1)
A first embodiment in which the electronic device of the present invention is applied to a wristwatch will be described below with reference to FIGS.
FIG. 1 is an enlarged cross-sectional view showing a wristwatch of the present invention, FIG. 2 is a front view of the watch glass of FIG. 1 removed, and FIG. 2 is a front view of the watch glass of FIG.
As shown in FIGS. 1 and 2, this wristwatch includes a wristwatch case 1 made of synthetic resin. As shown in FIG. 1, a watch glass 2 is attached to the upper part of the watch case 1, and a watch module 3 and a radio module 4 are incorporated in the watch case 1. Further, a synthetic resin back cover 5 is attached to the lower surface of the wristwatch case 1, and a plurality of push button switches 6 are provided on the side surface of the wristwatch case 1 as shown in FIG.

  As shown in FIG. 1, the timepiece module 3 includes an upper housing 7 made of synthetic resin and a lower housing 8 made of synthetic resin. The upper housing 7 is formed in a substantially box shape that is in close contact with the inner peripheral surface of the watch case 1, and the lower housing 8 is formed so as to be disposed in the lower portion in the upper housing 7. A liquid crystal display panel 9, a backlight panel 10, a holding member 11, and a circuit board 12 are arranged in order from the top in the upper housing 7 located on the lower housing 8. A button type battery 13 is arranged.

  In this case, the liquid crystal display panel 9 encloses a liquid crystal between a pair of transparent electrode substrates, and selectively applies a voltage between the pair of electrode substrates to display information such as time. It is an element and is electrically connected to an electrode terminal (not shown) of the circuit board 12 by an interconnector 14. The backlight panel 10 is composed of a planar light emitting element such as an EL light emitting panel (electroluminescence light emitting panel), and is configured to illuminate the liquid crystal display panel 9 from the lower surface side with surface-emitting light. The backlight panel 10 is electrically connected to an electrode terminal (not shown) of the circuit board 12 by a connection member 15 such as a coil spring.

  The holding member 11 is formed in a flat plate shape, and a first insertion hole 16 into which the interconnector 14 is inserted and a second insertion hole 17 into which the connection member 15 is inserted are provided at predetermined positions. When the connector 14 is inserted, the interconnector 14 is held to prevent the interconnector 14 from falling or being displaced, and the connecting member 15 is inserted into the second insertion hole 17 to hold and connect the connecting member 15. The member 15 is configured to prevent the member 15 from falling or misaligned. The circuit board 12 is mounted with various chip components (not shown) such as LSI necessary for the clock function, thereby forming a clock circuit.

  On the other hand, as shown in FIG. 1, the wireless module 4 is arranged corresponding to the lower surface of the parting portion 18 provided on the outer peripheral portion of the lower surface of the watch glass 2. As shown in FIG. 2, the wireless module 4 includes a substantially ring-shaped film substrate 20. An antenna coil 21 is formed in a substantially spiral shape on the upper and lower surfaces of the film substrate 20, and an IC chip 22, which is an RFID chip, is formed on a part of the film substrate 20, that is, the upper surface on the 6 o'clock side. Are provided in an electrically connected state. Thus, when the wireless module 4 brings a wristwatch close to a reader / writer (not shown) of an external device that generates an electromagnetic field, a current flows through the antenna coil 18 by electromagnetic induction due to the electromagnetic field generated by the reader / writer. Thereby, data is transmitted to and received from the reader / writer.

  In this case, as shown in FIG. 2 and FIG. 3, the parting part 18 may also be configured by printing on the outer peripheral part of the lower surface of the watch glass 2 except for the part corresponding to the display area 9 a of the liquid crystal display panel 9. Alternatively, a configuration in which a part-printed sheet is attached to the lower surface of the watch glass 2 may be used. In addition, the film substrate 20 is formed in a ring shape having a size surrounding the display area 9 a of the liquid crystal display panel 9, and is positioned below the parting portion 18 provided on the lower surface of the watch glass 2. Is disposed on the upper surface of the hook-shaped protrusion 1 a provided on the inner peripheral surface of the first electrode via a soft magnetic material 23.

  The soft magnetic material 23 is a ferromagnet having a property of attracting to a magnet, and is made of a material used for an electromagnet that follows a change in an external magnetic field, a magnetic core material of a transformer, or the like. That is, the ferromagnetic material is classified into a hard magnetic material and a soft magnetic material, and the hard magnetic material is magnetized by an external magnetic field and then remains magnetized even if the external magnetic field is removed. It is a substance that loses magnetization and returns to its original state when the is removed. The soft magnetic material 23 may be formed in a sheet shape and affixed on the hook-shaped protrusion 1a of the wristwatch case 1. Also, the soft magnetic material 23 may be mixed with an adhesive to add a soft magnetic material powder onto the hook-shaped protrusion 1a. The structure applied to may be used.

  According to such a wristwatch, information such as the time displayed on the display area 9a of the liquid crystal display panel 9 can be seen from the outside of the wristwatch case 1 through the watch glass 2 as well as a normal wristwatch. When the wristwatch case 1 is brought close to a reader / rider (not shown) that is an external device that generates a current, current flows through the antenna coil 21 of the wireless module 4 by electromagnetic induction due to the electromagnetic field generated by the reader / lider, thereby Data can be transmitted and received between the lidar and the wireless module 4.

  At this time, the soft magnetic material 23 is placed between the antenna coil 21 of the wireless module 4 disposed in the peripheral portion on the lower surface side of the watch glass 2 and the liquid crystal display panel 9 disposed below the antenna coil 21. Therefore, when magnetic flux is generated in the antenna coil 21 at the time of communication, there are conductive parts such as various electronic parts incorporated in the watch case 1, such as the liquid crystal display panel 9, the backlight panel 10, and the circuit. The soft magnetic material 23 can prevent the magnetic flux from being lost due to the generation of eddy currents in components such as the substrate 12, thereby increasing the reception sensitivity of the antenna coil 21. In this case, since there are almost no conductive parts such as electronic parts arranged between the antenna coil 21 and the liquid crystal display panel 9 in particular, the loss of magnetic flux is extremely small, thereby further improving the reception sensitivity. Can be increased.

  Further, in this wristwatch, the antenna coil 21 is arranged in the peripheral portion on the lower surface side of the watch glass 2, so that the antenna coil 21 can be brought close to the outer surface of the watch. By reducing the distance, the communication distance can be shortened, and the reception sensitivity of the antenna coil 21 can also be increased. In this case, even if the wireless module 4 is arranged on the lower surface side of the watch glass 2, the wireless module 4 can be hidden by the parting part 18 provided on the lower surface of the watch glass 2, so that both the appearance and the design are possible. Preferred ones can be obtained.

  In the first embodiment, the case where the soft magnetic material 23 is provided on the upper surface of the hook-shaped protrusion 1a of the watch case 1 and is disposed on the lower surface of the antenna coil 21 of the wireless module 4 has been described. 23 does not have to be provided on the upper surface of the hook-shaped protrusion 1a of the watch case 1 and disposed on the lower surface of the antenna coil 21, and the antenna coil 21 is not provided with the hook-shaped protrusion of the watch case 1 as in the modification shown in FIG. A structure in which the soft magnetic material 23 is provided on the upper surface of 1a so as to correspond to the antenna coil 21 on the lower surface of the hook-shaped protrusion 1a may be employed. Even in such a structure, since the soft magnetic material 23 is disposed between the watch glass 2 and the liquid crystal display panel 9, the same effects as those of the first embodiment can be obtained.

(Embodiment 2)
Next, a second embodiment in which the electronic apparatus of the present invention is applied to a wristwatch will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS. 1-3.
This wristwatch has a configuration in which a soft magnetic material 30 is provided on the lower surface of the backlight panel 10 positioned between the antenna coil 21 and the circuit board 12 of the wireless module 4, and the other configuration is the same as that of the first embodiment. Yes.

  Also in this case, the soft magnetic material 30 is made of a material used for an electromagnet or a magnetic core material of a transformer that follows a change in an external magnetic field, like the soft magnetic material 23 of the first embodiment, and is formed into a sheet shape and back. The structure may be affixed to the lower surface of the light panel 10 or may be a structure in which a soft magnetic material powder is mixed into an adhesive and applied to the lower surface of the backlight panel 10. In this case, as shown in FIGS. 6A and 6B, a coil spring or the like for electrically connecting the backlight panel 10 and the circuit board 12 is provided at a predetermined portion of the soft magnetic material 30. An insertion hole 30a for connection through which the connection member 15 is inserted is provided.

  In such a wristwatch, since the soft magnetic material 30 is provided on the lower surface of the backlight panel 10 positioned between the antenna coil 21 of the wireless module 4 and the circuit board 12, the antenna coil 21 is used during communication as in the first embodiment. Among the components having conductivity such as various electronic components incorporated in the wristwatch case 1 when the magnetic flux is generated, particularly the liquid crystal display panel 9 disposed between the antenna coil 21 and the circuit board 12 and the back. The soft magnetic material 30 can prevent eddy currents from being generated in conductive parts such as the light panel 10 and the loss of magnetic flux, thereby increasing the reception sensitivity of the antenna coil 21.

  In this case, it is only necessary to provide the soft magnetic material 30 on the lower surface of the backlight panel 10 in particular, so that the structure is simple, and the watch module 3 can be easily manufactured and assembled as in the case of existing products. As a result, the price can be reduced. Also in this case, since the antenna coil 21 is disposed in the peripheral portion on the lower surface side of the watch glass 2, the antenna coil 21 can be brought close to the outer surface of the wristwatch, and therefore, the watch glass is attached to the reader / rider as an external device. By bringing 2 closer, the communication distance can be shortened, and the reception sensitivity of the antenna coil 21 can also be increased.

(Embodiment 3)
Next, with reference to FIGS. 7A and 7B, a third embodiment in which the electronic apparatus of the present invention is applied to a wristwatch will be described. In this case, the same reference numerals are given to the same portions as those in the second embodiment shown in FIGS.
This wristwatch has a configuration in which a soft magnetic material 31 is provided on the upper surface of the holding member 11 positioned between the antenna coil 21 and the circuit board 12 of the wireless module 4, and the other configuration is substantially the same as that of the second embodiment. Yes.

  Also in this case, the soft magnetic material 31 is made of a material used for an electromagnet that follows a change in an external magnetic field, a magnetic core material of a transformer, and the like, like the soft magnetic materials 23 and 30 of the first and second embodiments. The structure may be formed and affixed to the holding member 11, or may be a structure in which a soft magnetic material powder is mixed into the adhesive and applied to the holding member 11. In this case, insertion holes 31 a and 31 b into which the interconnector 14 and the connection member 15 are inserted are provided at predetermined positions of the soft magnetic material 31 corresponding to the first and second insertion holes 16 and 17 of the holding member 11. It has been.

  Also in such a wristwatch, since the soft magnetic material 31 is provided on the upper surface of the holding member 11 positioned between the antenna coil 21 of the wireless module 4 and the circuit board 12, the antenna coil 21 is used during communication as in the second embodiment. Among the components having conductivity such as various electronic components incorporated in the wristwatch case 1 when the magnetic flux is generated, particularly the liquid crystal display panel 9 disposed between the antenna coil 21 and the circuit board 12 and the back. The soft magnetic material 31 can prevent the magnetic flux from being lost due to the generation of eddy currents in the conductive parts such as the light panel 10, the interconnector 14, and the connecting member 15, thereby improving the reception sensitivity of the antenna coil 21. Can be increased.

  In this case, since the soft magnetic material 31 may be provided on the upper surface of the holding member 11, the structure is simple, and the watch module 3 can be easily manufactured and assembled as in the case of existing products. Price can also be achieved. Also in this case, since the antenna coil 21 is arranged in the peripheral portion on the lower surface side of the watch glass 2, the communication distance can be shortened by bringing the watch glass 2 close to the reader / rider which is an external device. This also increases the reception sensitivity of the antenna coil 21.

  In the third embodiment, the case where the soft magnetic material 31 is provided on the upper surface of the holding member 11 is described. However, the soft magnetic material 31 is not necessarily provided on the upper surface of the holding member 11, and the lower surface of the holding member 11 is not necessarily provided. As shown in FIG. 8, a structure in which the soft magnetic material 31 is embedded in the holding member 11 or a structure in which the holding member 11 itself is formed of a soft magnetic material may be used. Also in this case, each soft magnetic material 31 is provided with insertion holes 31a and 31b into which the interconnector 14 and the connection member 15 are inserted. Any of these structures has the same effects as the third embodiment.

(Embodiment 4)
Next, with reference to FIGS. 9A and 9B, a fourth embodiment in which the electronic apparatus of the present invention is applied to a wristwatch will be described. Also in this case, the same reference numerals are given to the same portions as those in the second embodiment shown in FIGS.
This wristwatch has a configuration in which a soft magnetic material 32 is provided on the upper surface of the circuit board 12 located on the lower side of the antenna coil 21 of the wireless module 4, and the other configuration is substantially the same as that of the second embodiment. In this case, on the upper surface of the circuit board 12, a chip component 12a such as an LSI necessary for a clock function is provided, and various electrode terminals 12b and 12c are provided.

  Similarly to the soft magnetic materials 23, 30, and 31 of the first to third embodiments, the soft magnetic material 32 is made of a material used for an electromagnet that follows a change in an external magnetic field, a magnetic core material of a transformer, and the like, and is formed in a sheet shape. The structure may be affixed to the upper surface of the circuit board 12, or may be a structure in which a soft magnetic material powder is mixed in an adhesive and applied to the upper surface of the circuit board 12. Also in this case, through holes 33 and 34 for inserting the interconnector 14 and the connecting member 15 into contact with the electrode terminals 12b and 12c of the circuit board 12 are provided at predetermined positions of the soft magnetic material 32, respectively. It is provided corresponding to the electrode terminals 12b and 12c.

  Also in such a wristwatch, since the soft magnetic material 32 is provided on the upper surface of the circuit board 12 positioned below the antenna coil 21 of the wireless module 4, the magnetic flux is applied to the antenna coil 21 during communication as in the second embodiment. Among the components having conductivity such as various electronic components incorporated in the wristwatch case 1, the liquid crystal display panel 9 and the backlight panel disposed between the antenna coil 21 and the circuit board 12 are used. 10, in addition to conductive parts such as the interconnector 14 and the connection member 15, eddy currents are generated in the conductive parts such as the circuit board 12 and the chip part 12a mounted on the circuit board 12, and the magnetic flux is lost. Can be prevented by the soft magnetic material 32, whereby the receiving sensitivity of the antenna coil 21 can be increased.

  In this case, since the soft magnetic material 32 may be provided on the upper surface of the circuit board 12, the structure is simple, and the watch module 3 can be easily manufactured and assembled as in the case of existing products. Price can also be achieved. Also in this case, since the antenna coil 21 is arranged in the peripheral portion on the lower surface side of the watch glass 2, the communication distance can be shortened by bringing the watch glass 2 close to the reader / rider which is an external device. This also increases the reception sensitivity of the antenna coil 21.

(Embodiment 5)
Next, a fifth embodiment in which the present invention is applied to a wristwatch will be described with reference to FIGS. 10 (a) and 10 (b). Also in this case, the same reference numerals are given to the same portions as those in the second embodiment shown in FIGS.
In this wristwatch, a reflective liquid crystal display panel 35 is disposed between the antenna coil 21 of the wireless module 4 and the circuit board 12, and a soft magnetic material 36 is provided on the lower surface of the reflective liquid crystal display panel 35. Other than this, the configuration is substantially the same as in the second embodiment.

  In this case, the liquid crystal display panel 35 is a reflective type in which a reflective plate is provided on the lower surface of the lower electrode substrate among the pair of transparent electrode substrates, and the backlight panel 10 is not required. . Further, the soft magnetic material 36 provided on the lower surface of the liquid crystal display panel 35 is similar to the soft magnetic materials 23 and 30 to 32 of the first to fourth embodiments, such as an electromagnet that follows a change in an external magnetic field, a magnetic core material of a transformer, and the like. The material may be formed in a sheet shape and attached to the lower surface of the liquid crystal display panel 35. Alternatively, the soft magnetic material powder may be mixed with an adhesive and applied to the lower surface of the liquid crystal display panel 35. But it ’s okay.

  Also in such a wristwatch, the soft magnetic material 36 is provided on the lower surface of the liquid crystal display panel 35 located between the antenna coil 21 and the circuit board 12 of the wireless module 4. A liquid crystal display panel disposed between the antenna coil 21 and the circuit board 12 among conductive parts such as various electronic parts incorporated in the watch case 1 when magnetic flux is generated in the antenna coil 21. The soft magnetic material 36 can prevent the magnetic flux from being lost due to the generation of eddy currents in the conductive parts such as 35, and thereby the reception sensitivity of the antenna coil 21 can be increased.

  In this case, it is only necessary to provide the soft magnetic material 36 on the lower surface of the liquid crystal display panel 35. Therefore, the structure is simple, and the manufacturing and assembling work of the timepiece module 3 can be facilitated similarly to the existing products. The price can also be reduced. Also in this case, since the antenna coil 21 is arranged in the peripheral portion on the lower surface side of the watch glass 2, the communication distance can be shortened by bringing the watch glass 2 close to the reader / rider which is an external device. This also increases the reception sensitivity of the antenna coil 21.

As the soft magnetic material, a magnetic sheet obtained by dispersing and blending a metal magnetic powder in a resin to form a sheet may be used .

It is an expanded sectional view of the wristwatch to which this invention is applied. (Embodiment 1) It is a front view of the state which removed the timepiece glass from the wristwatch case of FIG. It is the front view which showed the timepiece glass of FIG. FIG. 6 is an enlarged cross-sectional view of a wrist watch showing a modification of the first embodiment. It is an expanded sectional view of the wristwatch to which this invention is applied. (Embodiment 2) The backlight panel of FIG. 5 is shown, (a) is the front view of the backlight panel, (b) is sectional drawing in the AA arrow. The holding member of the wristwatch to which this invention is applied is shown, (a) is a front view of the holding member, and (b) is a sectional view taken along the line BB. (Embodiment 3) It is sectional drawing of the holding member which showed the modification of Embodiment 3. The circuit board of the wristwatch which applied this invention is shown, (a) is the front view of the circuit board, (b) is sectional drawing in the CC arrow. (Embodiment 4) 1 shows a liquid crystal display panel of a wristwatch to which the present invention is applied, in which (a) is a front view of the liquid crystal display panel, and (b) is a cross-sectional view taken along line DD. (Embodiment 5)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Watch case 2 Watch glass 3 Watch module 4 Wireless module 9, 35 Liquid crystal display panel 10 Backlight panel 11 Holding member 12 Circuit board 14 Interconnector 15 Connection member 18 Parting part 20 Film board 21 Antenna coil 22 IC chip 23, 30, 31, 32, 36 Soft magnetic material

Claims (4)

With watch glass,
A watch case with this watch glass mounted on the top, and provided with an annular projection located below the outer periphery of the watch glass lower surface,
A soft magnetic material provided on the upper surface of the annular protrusion of the watch case;
An antenna coil is formed and an RFID chip is provided, and a ring-shaped substrate disposed on the upper surface of the annular protrusion of the watch case via the soft magnetic member;
A wristwatch characterized by comprising: With watch glass,
A watch case with this watch glass mounted on the top, and provided with an annular projection located below the outer periphery of the watch glass lower surface,
An antenna coil is formed and an RFID chip is provided, and a ring-shaped substrate disposed on the upper surface of the annular protrusion of the watch case;
A soft magnetic material provided on the lower surface of the annular protrusion of the watch case;
A wristwatch characterized by comprising:   The wristwatch according to claim 1 or 2, wherein a parting part is provided on an outer peripheral part of a lower surface of the watch glass, and the ring-shaped substrate is arranged corresponding to a lower surface of the parting part.   The wristwatch according to any one of claims 1 to 3, wherein the soft magnetic material is a magnetic sheet obtained by dispersing and blending a metal magnetic powder in a resin to form a sheet.

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