JP2020159763A - Electronic device having communication function - Google Patents

Abstract

To provide an electronic device having a communication function which can improve communication performance.SOLUTION: An electronic timepiece 1 includes: a movement 2 having an antenna 10 for communication; a dial 3 provided on the front side of the movement 2; and a metal case 4 for storing the movement 2 and the dial 3. An opening 11 which planarly opens is provided between the innermost periphery of the case 4 and an outer periphery of the dial 3.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to an electronic device with a communication function.

Conventionally, an electronic device with a communication function (for example, an electronic clock) that wirelessly receives or transmits / receives various information such as time information is known. As an electronic watch with a communication function, a metal case, an antenna for receiving radio waves housed in the case, a movement that drives the time display, and a metal sandwiched between the inner surface of the case and the movement. (See, for example, Patent Document 1). For example, in Patent Document 1, in order to secure the reception sensitivity of the antenna housed in the metal case, an insulating layer is provided on each contact surface between the dial and the movement, the dial and the case, and the case and the back cover. Has been done.

Japanese Unexamined Patent Publication No. 2004-325315

However, since the inner peripheral portion of the case and the outer peripheral portion of the dial are entirely overlapped in a plane, radio waves are blocked by this overlapping portion. Therefore, there is room for improvement in improving communication performance.

An embodiment of the present invention has been made to solve the above problems, and an object of the present invention is to provide an electronic device having a communication function capable of improving communication performance.

As a means for solving the above problems, the aspect of the present invention has the following configuration.
(1) The electronic device with a communication function according to the aspect of the present invention includes a movement having an antenna for performing communication, a metal body arranged on one side of the movement, and a metal accommodating the movement and the metal body. A case is provided, and an opening that opens in a plane is provided between the innermost circumference of the case and the outer periphery of the metal body.

According to this configuration, an opening that opens in a plane is provided between the innermost circumference of the case and the outer circumference of the metal body, so that a radio wave passing region can be secured through the opening. .. That is, the radio wave passing region can be expanded as compared with the configuration in which the inner peripheral portion of the case and the outer peripheral portion of the metal body are entirely overlapped in a plane. Therefore, the communication performance of the electronic device with a communication function can be improved. In addition, when the case is made of metal, the appearance of luxury can be further enhanced in combination with the metallic luster of the metal body.

(2) The electronic device with a communication function according to the above (1) may further include an insulating means for insulating the case and the metal body.

According to this configuration, the case and the metal body are not directly electrically connected and are not electromagnetically coupled. As a result, the radio wave blocking performance can be lowered, and the communication performance of the electronic device with a communication function can be further improved.

(3) In the electronic device with a communication function according to the above (2), the insulating means may be arranged between the case and the metal body in the opening direction of the opening.

According to this configuration, the case and the metal body are insulated in the opening direction of the opening, and the radio wave blocking performance is lowered, so that the communication performance of the electronic device with a communication function can be further improved. In addition, sufficient communication performance can be ensured without insulating the back cover and the case.

(4) In the electronic device with a communication function according to the above (2) or (3), the metal body includes a positioning convex portion for positioning the case and the metal body in the opening direction of the opening. The insulating means may be an insulating member arranged between the positioning protrusion and the case.

According to this configuration, the positioning convex portion enables positioning (positioning in the cross-sectional direction) between the case and the metal body in the opening direction of the opening. In addition, the positioning convex portion can secure a flat arrangement space for the insulating means.

(5) In the electronic device with a communication function according to the above (4), the metal body includes a disk-shaped main body portion and the positioning convex portion connected to the outer periphery of the main body portion, and is insulated. The member may have an annular shape that overlaps the outer circumference of the main body portion and the positioning convex portion in a plane.

According to this configuration, the case and the metal body are insulated at the outer circumference of the main body and the annular portion (insulating member) that overlaps the positioning convex portion in a plane, and the radio wave blocking performance is deteriorated. The communication performance of the device can be further improved. In addition, the insulating member can be stably supported in a wide range by the outer circumference of the main body and the positioning convex portion.

(6) In the electronic device with a communication function according to any one of (1) to (5) above, the metal body is a metal dial and has an insulating property that is planarly overlapped with the opening. Further dial rings may be provided.

According to this configuration, since the opening is hidden by the dial ring, the appearance can be further improved. In addition, when the case is made of metal, the appearance of luxury can be further enhanced in combination with the metallic luster of the dial.

(7) In the electronic device with a communication function according to (6) above, the dial ring supports the metal body in a state where a gap is maintained between the case and the metal body in the opening direction of the opening. You may.

According to this configuration, the case and the metal body are insulated in the opening direction of the opening, and the radio wave blocking performance is lowered, so that the communication performance of the electronic device with a communication function can be further improved.

(8) In the electronic device with a communication function according to the above (7), the dial ring includes at least one of a metal scale, a metal decoration, a coating containing a metal powder, and a printing containing a metal powder. A ring-side metal body may be provided, and the ring-side metal body may be insulated from the metal body and the case.

According to this configuration, the metallic luster of the metal body on the ring side can further enhance the appearance of luxury. In addition, the ring-side metal body exhibits the same performance as the non-feeding element, the transmission / reception performance of the antenna can be improved, and the communication performance of the electronic device with a communication function can be further improved.

(9) In the electronic device with a communication function according to any one of (1) to (5) above, the metal body is a back electrode of a solar cell and has an insulating property that is planarly overlapped with the opening. A dial may be further provided.

According to this configuration, it is possible to improve the communication performance of the electronic device having a communication function equipped with a solar cell. In addition, since the opening is hidden by the dial, the appearance can be further improved. By the way, when an opening larger than the antenna is provided in a portion that overlaps the antenna in a plane in order to secure communication performance, it is necessary to enlarge the outer shape of the solar cell in order to secure the required power generation area, and the size is reduced. There is a problem in trying to achieve this. On the other hand, according to this configuration, by providing an opening that opens in a plane between the innermost circumference of the case and the outer circumference of the metal body, radio waves can be transmitted through the opening without enlarging the outer shape of the solar cell. It is possible to secure a passing area and maintain the transmission / reception performance of the antenna. Therefore, it is suitable for miniaturization of electronic devices with communication functions.

(10) In the electronic device with a communication function according to any one of (1) to (9) above, the movement further includes a circuit board on which an electrode connected to a power supply potential is formed, and the circuit board. A connecting member that electrically connects the metal body and the metal body may be further provided.

By the way, when the electric potential of the metal body is floating, there is a high possibility that the electric charge (static electricity) applied to the case is discharged to the metal body. The discharge to the metal body is temporary and minute, but there is a high possibility that the discharge will affect the circuit board of the movement. On the other hand, according to this configuration, the circuit board (specifically, the electrode formed on the circuit board and connected to the power supply potential) and the metal body are electrically connected by the connecting member to form the metal body. Since the potential is the same as the power supply potential, it is unlikely to affect the circuit board when discharging to a metal body. Therefore, it is possible to suppress a decrease in static electricity resistance.

(11) In the electronic device with a communication function according to the above (10), the movement further includes a movement frame having a through hole that opens in the opening direction of the opening, and the through hole is planar with the antenna. The connecting member may be arranged in the through hole of the move frame so as not to overlap with the moving frame.

According to this configuration, the potential of the metal body is the same as the power supply potential, but since the case and the metal body are not directly electrically connected, they are not electromagnetically coupled, and communication performance is improved. It does not decrease. In addition, when discharging to a metal body, electric charges can be released to the power supply unit without passing through the integrated circuit of the circuit board, which is suitable for improving the static electricity resistance.

(12) In the electronic device with a communication function according to the above (11), the movement may further include a drive mechanism, and the through hole may be arranged at a position that does not overlap with the drive mechanism in a plane.

According to this configuration, when discharging to a metal body, electric charges can be released to a power supply unit without passing through a drive mechanism, which is suitable for improving static electricity resistance.

(13) In the electronic device with a communication function according to the above (11) or (12), the connecting member may be an elastic body having conductivity.

According to this configuration, the circuit board and the metal body are electrically connected by the elastic force of the connecting member, which is suitable for improving the connection reliability between the circuit board and the metal body.

(14) In the electronic device with a communication function according to any one of (1) to (13) above, the electronic device with a communication function may be an electronic clock that displays a time.

According to this configuration, it is possible to provide an electronic clock capable of improving communication performance.

According to the embodiment of the present invention, it is possible to provide an electronic device with a communication function capable of improving communication performance.

It is a top view of the electronic clock of 1st Embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. It is an exploded perspective view of the electronic timepiece of 1st Embodiment. It is the IV part enlarged view of FIG. It is an enlarged view of V part of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG. It is sectional drawing of the main part of the electronic timepiece of the 1st modification of 1st Embodiment. It is sectional drawing of the main part of the electronic timepiece of the 2nd modification of 1st Embodiment. It is sectional drawing of the main part of the electronic timepiece of the 3rd modification of 1st Embodiment. It is a top view of the electronic clock of the 4th modification of 1st Embodiment. It is sectional drawing of the electronic clock of 2nd Embodiment. It is sectional drawing of the main part of FIG. It is a top view of the solar cell in the electronic timepiece of 2nd Embodiment. It is a plan view on the opposite side of FIG. It is an exploded perspective view of the solar cell in the electronic timepiece of 2nd Embodiment.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the following embodiment, an electronic wristwatch with a communication function (hereinafter, also simply referred to as “electronic clock”) as an electronic device with a communication function will be described as an example. For example, the communication function of the electronic clock includes a communication function such as GPS (Global Positioning System), Wi-Fi, Bluetooth (registered trademark), and a wireless communication function such as a contactless IC card function. In the following description, when the electronic watch is worn on the wrist and used, the side visually recognized by the user may be referred to as the "front side" and the side opposite to the front side may be referred to as the "back side". In the drawings used in the following description, the scale of each member is appropriately changed in order to make each member recognizable.

[Electronic clock]
FIG. 1 is a plan view of the electronic clock 1 of the first embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is an exploded perspective view of the electronic clock 1 of the first embodiment. In each figure, the illustration of the belt for attaching the electronic watch 1 to the wrist is omitted.
As shown in FIG. 1, the electronic watch 1 includes a movement 2 (see FIG. 2), a dial 3 (metal body), a metal case 4, an insulating member 5 (see FIG. 2), and a dial ring 6 (see FIG. 2). ) And the connecting member 7. In FIG. 1, the cover glass 8, the pointer 9 (for example, the hour hand, the minute hand, the second hand) and the like (see FIG. 3) are not shown.

As shown in FIG. 2, the movement 2 has an antenna 10 for performing communication. The antenna 10 is formed of a chip antenna and a copper foil pattern formed on a circuit board. The dial 3 is arranged on one side (front side) of the movement 2. The case 4 houses the movement 2 and the dial 3. The case 4 has a circular outer shape in a plan view (see FIG. 1).

As shown in FIG. 1, the electronic clock 1 has an opening 11 that opens in a plane between the innermost circumference of the case 4 and the outer circumference of the dial 3. The plane of the electronic clock 1 (case 4) means a plane orthogonal to the thickness direction of the electronic clock 1. The plane of the electronic clock 1 is a plane parallel to the surface of the dial 3. Reference numeral C1 in the figure indicates the central axis of the case 4.

The opening 11 is configured by arranging a plurality of gaps 11a to 11d having an arcuate shape in a plan view at intervals in the circumferential direction (for example, four in the present embodiment). The gaps 11a to 11d have substantially the same size as each other in a plan view. The size of the opening 11 is set to a size capable of ensuring the transmission / reception performance required for the antenna 10 built in the electronic clock 1.

[Movement]
As shown in FIG. 3, the movement 2 includes a drive unit 20, a battery unit 21, and a switch spring 22.
The drive unit 20 includes a move frame 23, a drive mechanism 24, and a circuit board 25.
The move frame 23 is a through portion that opens in the opening direction of the mechanism accommodating portion 23a in which the drive mechanism 24 is accommodated, the antenna accommodating portion 23b (see FIG. 2) in which the antenna 10 is accommodated, and the opening 11 (see FIG. 2). It has a hole 23c (see FIG. 6). Hereinafter, the opening direction of the opening 11 is also simply referred to as "opening direction". The opening direction is a direction substantially parallel to the central axis C1 of the case 4 (thickness direction of the case 4).

As shown in FIG. 2, the mechanism accommodating portion 23a penetrates the move frame 23 in the opening direction. The mechanism accommodating portion 23a has a hexagonal shape in a plan view (see FIG. 3).
The antenna accommodating portion 23b is a recess provided on the back side of the move frame 23. The antenna accommodating portion 23b overlaps a part of the opening 11 in a plane. The size of the antenna accommodating portion 23b is set to a size capable of ensuring the transmission / reception performance required for the antenna 10.

As shown in FIG. 3, the through hole 23c is arranged at a position where it does not overlap with the antenna accommodating portion 23b (antenna 10) in a plane. In a plan view, the through hole 23c is arranged on the side opposite to the antenna accommodating portion 23b with the central axis C1 of the case 4 interposed therebetween. The through hole 23c is arranged at a position where it does not overlap with the drive mechanism 24 in a plane. In a plan view, the through holes 23c are arranged at intervals from the mechanism accommodating portion 23a.

The drive mechanism 24 includes a plurality of gears for driving the pointer 9, a motor for rotating the gears, and the like (not shown).
The circuit board 25 includes an integrated circuit 25a and an antenna 10. An electrode connected to the power supply potential is formed on the circuit board 25. Reference numeral 26 in the drawing indicates a screw for fixing the circuit board 25 to the move frame 23.

The battery unit 21 includes a battery 27, a battery frame 28, and a battery holder 29.
The battery 27 has a circular shape (coin type) in a plan view.
As shown in FIG. 2, the battery frame 28 has a battery accommodating portion 28a for accommodating the battery 27. The battery accommodating portion 28a is a recess provided on the back side of the battery frame 28.
The battery retainer 29 is a member for pressing the battery 27 from the back side.

The switch spring 22 is a member for integrally assembling the components (drive unit 20 and battery unit 21) of the movement 2. The switch spring 22 can connect the drive unit 20 and the battery unit 21 by its own elastic force. The switch spring 22 includes a terminal portion 22a that abuts on a terminal (not shown) of the battery 27, and an arm portion 22b that extends along the side surface of the battery frame 28 and the side surface of the move frame 23. For example, the drive unit 20 and the battery unit 21 are connected by hooking the tip of the arm portion 22b on the side portion (convex portion on the side surface) of the move frame 23.

[Dial]
The dial 3 has characters and the like (not shown) for displaying the time. The dial 3 is made of metal. It should be noted that the metal product is not limited to the product manufactured only of metal, but also includes a resin or the like coated with a metal film. As shown in FIG. 1, the dial 3 includes a disk-shaped main body portion 3a and a positioning convex portion 3b connected to the outer periphery of the main body portion 3a.
The main body 3a has an outer shape smaller than the opening inner diameter of the case 4 (the innermost circumference of the case 4) in a plan view.
A plurality of positioning convex portions 3b (for example, four in the present embodiment) are arranged at intervals in the circumferential direction. The arrangement intervals of the positioning protrusions 3b have substantially the same size as each other. For example, the positioning convex portion 3b is integrally formed of the same member as the main body portion 3a.

[Case]
The case 4 is made of metal. The case 4 includes a tubular body portion 4a and an inner flange portion 4b protruding inward from the inner circumference of the body portion 4a.
The body portion 4a has a size capable of accommodating the movement 2 and the dial 3. The inner diameter of the body portion 4a is larger than the outermost outer diameter of the movement 2 and the outermost outer diameter of the dial 3.
The inner flange portion 4b has an annular shape in a plan view. The inner diameter of the inner flange portion 4b is smaller than the outermost shape of the metal body. The front side of the inner flange portion 4b functions as a dial ring accommodating portion in which the dial ring 6 is accommodated. For example, the inner flange portion 4b is integrally formed of the same member as the body portion 4a.

The electronic clock 1 includes a button 12 for operating the movement 2 from the outside of the body 4a. A plurality of buttons 12 are arranged on the outer periphery of the body portion 4a at intervals. The plurality of buttons 12 are provided at 3 o'clock position (right side in FIG. 1), 8 o'clock position (lower left side in FIG. 1), and 10 o'clock position (upper left side in FIG. 1) on the side surface of the body portion 4a. There is.

[Insulation member]
As shown in FIG. 2, the insulating member 5 (insulating means) insulates the case 4 and the dial 3. The insulating member 5 is arranged between the case 4 and the dial 3 in the opening direction. The insulating member 5 is thinner than the dial 3 in the opening direction. The insulating member 5 is arranged between the positioning convex portion 3b of the dial 3 and the inner flange portion 4b of the case 4. The insulating member 5 has an annular shape that substantially overlaps the outer periphery of the main body portion 3a of the dial 3 and the positioning convex portion 3b. For example, the insulating member 5 is an annular polyester sheet (insulating sheet).

[Dial ring]
A scale or the like is engraved on the surface of the dial ring 6. The dial ring 6 has an insulating property. The dial ring 6 has an annular shape that overlaps the opening 11 in a plane. The dial ring 6 includes a front annular portion 6a arranged on the front side of the inner flange portion 4b of the case 4, and an inclined annular portion 6b arranged radially inside the inner flange portion 4b. The front side of the front annular portion 6a functions as a cover glass accommodating portion in which the cover glass 8 is accommodated. The front side of the inclined annular portion 6b has an inclined surface 6c that is inclined so as to be located on the back side (the dial 3 side) toward the side of the central axis C1 of the case 4. For example, the inclined annular portion 6b is integrally formed of the same member as the front annular portion 6a.

The cover glass 8 closes the front side of the case 4. The cover glass 8 has a disk shape. The cover glass 8 is placed on the front annular portion 6a of the dial ring 6. The cover glass 8 is fitted to the front end portion of the body portion 4a of the case 4 via the packing 14.
Reference numeral 13 in the figure indicates a back cover for closing the back side of the case 4. The back cover 13 is attached to the back end of the body 4a of the case 4.

[Connecting member]
As shown in FIG. 6, the connecting member 7 electrically connects the circuit board 25 and the dial 3. Specifically, the connecting member 7 electrically connects the positive potential pattern (not shown) of the battery formed on the front side of the circuit board 25 with the back side of the dial 3. The connecting member 7 is arranged in the through hole 23c of the move frame 23. The connecting member 7 is an elastic body having conductivity. For example, the connecting member 7 is a coil spring.

As described above, the electronic clock 1 according to the present embodiment accommodates a movement 2 having an antenna 10 for performing communication, a dial 3 arranged on the front side of the movement 2, a movement 2 and a dial 3. A case 4 made of metal is provided, and an opening 11 that opens in a plane is provided between the innermost circumference of the case 4 and the outer circumference of the dial 3.

According to this configuration, an opening 11 that opens in a plane is provided between the innermost circumference of the case 4 and the outer circumference of the dial 3, so that a radio wave passing region is secured through the opening 11. can do. That is, the radio wave passing region can be expanded as compared with the configuration in which the inner peripheral portion of the case 4 and the outer peripheral portion of the dial 3 are entirely overlapped in a plane. Therefore, the communication performance of the electronic clock 1 can be improved. In addition, when the case 4 is made of metal, the appearance of luxury can be further enhanced in combination with the metallic luster of the dial 3.

In the present embodiment, an insulating member 5 that insulates the case 4 and the dial 3 is provided.

According to this configuration, the case 4 and the dial 3 are not directly electrically connected and are not electromagnetically coupled. As a result, the radio wave blocking performance can be lowered, and the communication performance of the electronic timepiece 1 can be further improved.

In the present embodiment, the insulating member 5 is arranged between the case 4 and the dial 3 in the opening direction of the opening 11.

According to this configuration, the case 4 and the dial 3 are insulated in the opening direction of the opening 11, and the radio wave blocking performance is lowered, so that the communication performance of the electronic watch 1 can be further improved. In addition, sufficient communication performance can be ensured without insulating the back cover 13 and the case 4.

In the present embodiment, the dial 3 includes a positioning convex portion 3b for positioning the case 4 and the metal body in the opening direction of the opening 11. The insulating member 5 may be arranged between the positioning convex portion 3b and the case 4.

According to this configuration, the positioning convex portion 3b can position the case 4 and the dial 3 in the opening direction of the opening 11 (positioning in the cross-sectional direction). In addition, the positioning convex portion 3b can secure a flat arrangement space for the insulating member 5.

In the present embodiment, the dial 3 includes a disk-shaped main body portion 3a and a positioning convex portion 3b connected to the outer periphery of the main body portion 3a. The insulating member 5 has an annular shape that substantially overlaps the outer circumference of the main body 3a and the positioning convex portion 3b.

According to this configuration, the case 4 and the dial 3 are insulated from each other at the outer circumference of the main body 3a and the annular portion (insulating member 5) that overlaps the positioning convex portion 3b in a plane, so that the radio wave blocking performance is lowered. , The communication performance of the electronic clock 1 can be further improved. In addition, the outer circumference of the main body 3a and the positioning convex portion 3b can stably support the insulating member 5 in a wide range.

In the present embodiment, the metal body is a metal dial 3. The electronic clock 1 includes an insulating dial ring 6 that is planarly overlapped with the opening 11.

According to this configuration, since the opening 11 is hidden by the dial ring 6, the appearance can be further improved. In addition, when the case 4 is made of metal, the appearance of luxury can be further enhanced in combination with the metallic luster of the dial 3.

In this embodiment, the movement 2 includes a circuit board 25 on which an electrode connected to a power source potential is formed. The electronic clock 1 includes a connecting member 7 that electrically connects the circuit board 25 and the dial 3.

By the way, when the electric potential of the dial 3 is floating, there is a high possibility that the electric charge (static electricity) applied to the case 4 is discharged to the dial 3. Although the discharge to the dial 3 is temporary and minute, there is a high possibility that the discharge will affect the circuit board 25 of the movement 2. On the other hand, according to this configuration, the circuit board 25 (specifically, an electrode formed on the circuit board 25 and connected to the power supply potential) and the dial 3 are electrically connected by the connecting member 7. Since the potential of the dial 3 becomes the same as the power supply potential, it is unlikely that the circuit board 25 will be affected when discharging to the dial 3. Therefore, it is possible to suppress a decrease in static electricity resistance.

In the present embodiment, the movement 2 includes a movement frame 23 having a through hole 23c that opens in the opening direction of the opening 11. The through hole 23c is arranged at a position where it does not overlap with the antenna 10 in a plane. The connecting member 7 is arranged in the through hole 23c of the move frame 23.

According to this configuration, the potential of the dial 3 is the same as the power supply potential, but since the case 4 and the dial 3 are not directly electrically connected, they are not electromagnetically coupled. It does not reduce the communication performance. In addition, when discharging to the dial 3, the electric charge can be released to the power supply unit without passing through the integrated circuit 25a of the circuit board 25, which is suitable for improving the static electricity resistance.

In this embodiment, the movement 2 includes a drive mechanism 24. The through hole 23c is arranged at a position where it does not overlap with the drive mechanism 24 in a plane.

According to this configuration, when discharging to the dial 3, the electric charge can be released to the power supply unit without passing through the drive mechanism 24, which is suitable for improving the static electricity resistance.

In the present embodiment, the connecting member 7 is an elastic body having conductivity.

According to this configuration, since the circuit board 25 and the dial 3 are electrically connected by the elastic force of the connecting member 7, it is suitable for improving the connection reliability between the circuit board 25 and the dial 3. ..

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, as an example of an electronic device with a communication function, an electronic wristwatch with a communication function has been described as an example, but the present invention is not limited to this. For example, the electronic device with a communication function may be an electronic clock larger than an electronic wristwatch. For example, the present invention may be applied to various electronic devices having a communication function (electronic devices having no clock function) other than the electronic clock.

In the above-described embodiment, the example in which the insulating member 5 is an annular polyester sheet has been described, but the present invention is not limited to this. For example, the insulating member 5 may be divided in the circumferential direction. For example, the insulating member 5 may be printed on the front side of the dial 3 or the back side of the inner flange portion 4b.

In the above-described embodiment, an example in which the insulating means is an insulating member has been described, but the present invention is not limited to this. For example, the insulating means may be another insulating means such as a void.

In the following modification, the same configurations as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

[First modification]
FIG. 7 is a cross-sectional view of a main part of the electronic clock 101 of the first modification of the first embodiment. FIG. 7 is a cross-sectional view corresponding to FIG.
In the above-described embodiment, an example including an insulating member 5 that insulates the case 4 and the dial 3 has been described, but the present invention is not limited to this. For example, as shown in FIG. 7, the electronic clock 1 does not have to have the insulating member 5. In this modification, the insulating member 5 is not arranged between the case 4 and the dial 3 in the opening direction.

The dial ring 106 supports the dial 3 while maintaining a gap 115 between the case 4 and the dial 3 in the opening direction. As a result, the case 4 and the dial 3 are insulated. The dial ring 106 has a contact surface 106d that can directly contact the outer peripheral surface of the dial 3. A gap 115 is formed between the back surface of the inner flange portion 4b of the case 4 and the front surface of the positioning convex portion 3b of the dial 3.

In this modification, the dial ring 10 supports the dial 3 in a state where a gap 115 is maintained between the case 4 and the metal body in the opening direction of the opening 11.

According to this configuration, the case 4 and the dial 3 are insulated in the opening direction of the opening 11, and the radio wave blocking performance is lowered, so that the communication performance of the electronic watch 101 can be further improved.

[Second modification]
FIG. 8 is a cross-sectional view of a main part of the electronic clock 201 of the second modification of the first embodiment. FIG. 8 is a cross-sectional view corresponding to FIG.
In the above-described embodiment, an example in which a scale or the like is engraved on the surface of the dial ring 6 has been described, but the present invention is not limited to this. For example, as shown in FIG. 8, the dial ring 6 may include a metal ring-side metal body 216 including a metal scale and a metal decoration. The ring-side metal body 216 is insulated from the dial 3 and the case 4.

The ring-side metal body 216 is arranged on the inclined surface 6c of the dial ring 6. For example, the ring-side metal body 216 is formed by applying a liquid containing metal powder to the surface of the inclined annular portion 6b.
The ring-side metal body 216 does not necessarily include the scale and decoration of the dial ring 6. For example, the ring-side metal body 216 may include any one of a metal scale, a metal decoration, a coating containing metal powder, and a printing containing metal powder. That is, the ring-side metal body 216 may include at least one of a metal scale, a metal decoration, a coating containing metal powder, and a printing containing metal powder.

In this modification, the dial ring 6 includes a ring-side metal body 216 that includes a metal scale and a metal decoration. The ring-side metal body 216 is insulated from the dial 3 and the case 4.

According to this configuration, the metallic luster of the ring-side metal body 216 can further enhance the appearance of luxury. In addition, the ring-side metal body 216 exhibits the same performance as the non-feeding element, can improve the transmission / reception performance of the antenna, and can further improve the communication performance of the electronic timepiece 201.

[Third variant]
FIG. 9 is a cross-sectional view of a main part of the electronic clock 301 of the third modification of the first embodiment. FIG. 9 is a cross-sectional view corresponding to FIG.
In the second modification described above, an example in which the ring-side metal body 216 is formed only on the surface of the inclined annular portion 6b has been described, but the present invention is not limited to this. For example, as shown in FIG. 9, the ring-side metal body 316 may be formed over the inclined annular portion 306b and the front annular portion 306a. The inclined surface 306c of the dial ring 306 is formed so as to straddle the inclined annular portion 306b and the front annular portion 306a. For example, the ring-side metal body 316 may be formed by applying a liquid containing metal powder to the inclined surface 306b of the inclined annular portion 306b and the front annular portion 306a as a whole.

[Fourth variant]
FIG. 10 is a plan view of the electronic clock 401 of the fourth modification of the first embodiment. FIG. 10 is a plan view corresponding to FIG.
In the above-described embodiment, the dial 3 has been described with reference to an example including a disk-shaped main body portion 3a and a positioning convex portion 3b connected to the outer periphery of the main body portion 3a, but the present invention is not limited to this. For example, as shown in FIG. 10, the dial 403 does not have to have the positioning convex portion 3b. That is, the dial 403 itself may have a disk shape. In this case, the cross-sectional positioning of the dial 3 and the insulation from the case 4 may be performed with the same configuration as in the first modification.

[Second Embodiment]
FIG. 11 is a cross-sectional view of the electronic clock 501 of the second embodiment. FIG. 11 is a cross-sectional view corresponding to FIG. FIG. 12 is a cross-sectional view of a main part of FIG. FIG. 12 is a cross-sectional view corresponding to FIG. FIG. 13 is a plan view of the solar cell 530 in the electronic clock 501 of the second embodiment. FIG. 14 is a plan view on the opposite side of FIG. FIG. 15 is an exploded perspective view of the solar cell 530 in the electronic clock 501 of the second embodiment.
In the above-described embodiment, the metal body is a metal dial 3, and the electronic timepiece 1 has been described with reference to an example in which an insulating dial ring 6 that is planarly overlapped with the opening 11 is provided. Not exclusively. For example, as shown in FIG. 11, the metal body is the back electrode 531 of the solar cell 530, and may include an insulating dial 503 that is planarly overlapped with the opening 11. As shown in FIG. 12, the outer peripheral surface of the dial 503 is in contact with the back surface of the inner flange portion 4b of the metal case 4.

The dial 503 is made of a light-transmitting insulating material.
The solar cell 530 is provided on the back surface side of the dial 503. As shown in FIG. 13, the solar cell 530 has a circular shape in a plan view. The solar cell 530 has a shaft insertion hole 530a for inserting the pointer shaft, and a non-power generation portion 530b that planely overlaps with the antenna accommodating portion 23b (see FIG. 11).

As shown in FIG. 15, the solar cell 530 includes a back surface electrode 531, a base film 532, a solar film 533, and a protective layer 534. The back surface electrode 531, the base film 532, the solar film 533, and the protective layer 534 are arranged in this order from the back side of the solar cell 530. Reference numerals 535 and 536 in the figure indicate generated power output terminals (first terminal 535, second terminal 536) for outputting the power generated by the solar cell 530. The solar film represents all the solar cells formed on the base film.

The back surface electrode 531 has a disk shape. The back surface electrode 531 has an outer shape smaller than the opening inner diameter of the case 4 (the innermost circumference of the case 4) in a plan view. The back surface electrode 531 has a shaft hole 531a corresponding to the shaft insertion hole 530a and a through hole 531b corresponding to the non-power generation unit 530b.
The base film 532 has a disk shape larger than the back surface electrode 531. The base film 532 is made of an insulating material such as resin. The base film 532 has a shaft hole 532a corresponding to the shaft insertion hole 530a and a through hole 532b corresponding to the non-power generation unit 530b.
The protective layer 534 has a disk shape substantially the same size as the base film 532. The protective layer 534 is made of a light-transmitting insulating material. The protective layer 534 has a shaft hole 534a corresponding to the shaft insertion hole 530a and a through hole 534b corresponding to the non-power generation unit 530b.

The solar film 533 includes a plurality of (for example, six in the present embodiment) solar cells 533a1 to 533a6 arranged adjacent to each other in the circumferential direction. For example, each solar cell 533a1 to 533a6 is made of amorphous silicon or the like. The solar cells 533a1 to 533a6 are connected in series. In the figure, reference numerals 533b1 to 533b5 are connection portions for electrically connecting two adjacent solar cells 533a1 to 533a6, reference numeral 533c is a shaft hole corresponding to a shaft insertion hole 530a, and reference numeral 533d is a non-power generation unit 530b. Notches are shown respectively.

Each of the solar cells 533a1 to 533a6 is electrically connected to the circuit board 25 (see FIG. 11) in a state of being connected in series. In the figure, the solar cell 533a1 having the first convex portion 533j is referred to as "first solar cell 533a1", and the solar cell 533a2 having the second convex portion 533k is referred to as "second solar cell 533a2". For example, the first solar cell 533a1 is electrically connected to the positive electrode of the circuit board 25 via the first terminal 535. For example, the second solar cell 533a2 is electrically connected to the negative electrode of the circuit board 25 via the second terminal 536.

In this modification, the metal body is the back electrode 531 of the solar cell 530. The electronic clock 501 includes an insulating dial 503 that is planarly overlapped with the opening 11.

According to this configuration, the communication performance of the electronic clock 501 including the solar cell 530 can be improved. In addition, since the opening 11 is hidden by the dial 503, the appearance can be further improved. By the way, when an opening larger than the antenna is provided in a portion that overlaps the antenna in a plane in order to secure communication performance, it is necessary to enlarge the outer shape of the solar cell in order to secure the required power generation area, and the size is reduced. There is a problem in trying to achieve this. On the other hand, according to this configuration, by providing the opening 11 that opens in a plane between the innermost circumference of the case 4 and the outer circumference of the back surface electrode 531, the opening is performed without enlarging the outer shape of the solar cell 530. It is possible to secure a radio wave passing region through the unit 11 and maintain the transmission / reception performance of the antenna. Therefore, it is suitable for miniaturization of the electronic clock 501.

In the second embodiment, an example in which the solar film 533 includes six solar cells 533a1 to 533a6 has been described, but the present invention is not limited to this. The number of arrangements of each solar cell can be changed according to the required specifications.

In addition, it is possible to replace the components in the above-described embodiment with well-known components without departing from the spirit of the present invention. Moreover, each modification described above may be combined.

1,101,201,301,401,501 ... Electronic clock 2 ... Movement 3,403 ... Dial (metal body)
3a ... Main body 3b ... Positioning convex part 4 ... Case 5 ... Insulating member (insulating means)
6,106,306 ... Dial ring 7 ... Connecting member 10 ... Antenna 11 ... Opening 24 ... Drive mechanism 25 ... Circuit board 216,316 ... Ring side metal body 503 ... Dial 530 ... Solar cell 531 ... Back electrode (metal body) )

Claims (14)

A movement with an antenna for communication and
A metal body arranged on one side of the movement and
A metal case for accommodating the movement and the metal body.
An electronic device with a communication function, characterized in that an opening that opens in a plane is provided between the innermost circumference of the case and the outer circumference of the metal body. The electronic device with a communication function according to claim 1, further comprising an insulating means for insulating the case and the metal body. The electronic device with a communication function according to claim 2, wherein the insulating means is arranged between the case and the metal body in the opening direction of the opening. The metal body includes a positioning convex portion for positioning the case and the metal body in the opening direction of the opening.
The electronic device with a communication function according to claim 2 or 3, wherein the insulating means is an insulating member arranged between the positioning convex portion and the case. The metal body includes a disk-shaped main body portion and the positioning convex portion connected to the outer periphery of the main body portion.
The electronic device with a communication function according to claim 4, wherein the insulating member has an annular shape that substantially overlaps the outer periphery of the main body and the positioning convex portion. The metal body is a metal dial and
The electronic device with a communication function according to any one of claims 1 to 5, further comprising an insulating dial ring that is planarly overlapped with the opening. The electronic device with a communication function according to claim 6, wherein the dial ring supports the metal body while maintaining a gap between the case and the metal body in the opening direction of the opening. .. The dial ring comprises a ring-side metal body comprising at least one of a metal scale, a metal decoration, a coating containing metal powder, and a printing containing metal powder.
The electronic device with a communication function according to claim 7, wherein the ring-side metal body is insulated from the metal body and the case. The metal body is a back electrode of a solar cell.
The electronic device with a communication function according to any one of claims 1 to 5, further comprising an insulating dial that vertically overlaps the opening. The movement further comprises a circuit board on which electrodes connected to the power potential are formed.
The electronic device with a communication function according to any one of claims 1 to 9, further comprising a connecting member for electrically connecting the circuit board and the metal body. The movement further comprises a movement frame having a through hole that opens in the opening direction of the opening.
The through hole is arranged at a position where it does not overlap with the antenna in a plane.
The electronic device with a communication function according to claim 10, wherein the connecting member is arranged in the through hole of the move frame. The movement further comprises a drive mechanism and
The electronic device with a communication function according to claim 11, wherein the through hole is arranged at a position where the drive mechanism does not overlap in a plane. The electronic device with a communication function according to claim 11 or 12, wherein the connecting member is an elastic body having conductivity. The electronic device with a communication function according to any one of claims 1 to 13, wherein the electronic device with a communication function is an electronic clock that displays a time.

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