Patent Description:
Conventionally, electronic devices such as electronic timepieces having antennas for GPS reception are known. The members (antenna elements) that make up the antenna are generally made of metal, and there are concerns about oxidation and corrosion when the antenna is exposed to the open air.

For this reason, the antenna is preferably accommodated inside the electronic device. For example, <CIT> discloses a configuration in which an antenna is accommodated inside a case of a timepiece (electronic timepiece).

<CIT> (<NUM>-<NUM>-<NUM>)discloses an electronic watch comprising a solar cell panel <NUM>, a planar antenna <NUM> and a circuit board <NUM>, wherein the solar cell <NUM> is connected to the circuit board through coil springs <NUM>, <NUM> extending through the antenna <NUM>.

<CIT> (<NUM>-<NUM>-<NUM>)describes an electronic timepiece (<FIG>) having an antenna 3F, a solar panel 5F and a circuit board <NUM> such that the solar panel 5F and the circuit board <NUM> are connected through a coil spring connector <NUM> located between the antenna 3F and the case body <NUM>. Multiple screw holes <NUM> are machined through the antenna 3F which is fixed to the main plate <NUM>.

However, electronic devices such as electronic timepieces are expected to be worn on a person's arm or other parts of the body and are generally desired to be miniaturized to improve usability and the like.

When electronic devices are miniaturized, the arrangement of various parts accommodated inside the device becomes more complex. In particular, when relatively large parts such as an antenna (antenna element) and a solar panel are miniaturized, the complex arrangement is likely to cause losses due to contact between parts for connector members (springs) and reduce electrical performance such as the antenna efficiency and solar power generation efficiency.

The purpose of the present disclosure is to solve these problems and to provide an electronic device and an electronic timepiece that can suppress the reduction of electrical performance due to the miniaturization of the device.

In order to solve the problems of the conventional technology, the electronic device according to an embodiment of the present disclosure includes:.

According to the present disclosure, it is possible to suppress the reduction of electrical performance due to the miniaturization of the device.

The accompanying drawings are not intended as a definition of the limits of the invention but illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention, wherein:.

With reference to <FIG>, an embodiment of an electronic device and an electronic timepiece according to the present disclosure will be described. In the present embodiment described in the following example, the electronic device is an electronic timepiece that has an antenna.

Although various limitations technically preferable for carrying out the present disclosure are put on the embodiment(s) described below, the technical scope of the present disclosure is not limited to the embodiment(s) below or illustrated examples.

<FIG> is an exploded perspective view of main parts of an electronic timepiece (hereinafter simply referred to as a "timepiece") as an electronic device of the present embodiment. <FIG> is a front view of the timepiece illustrated in <FIG>. <FIG> is a schematic cross-sectional view of main parts along the A-A line in <FIG>. <FIG> is an enlarged view of the portion IV enclosed by a dashed line in <FIG>. <FIG> is a schematic cross-sectional view of main parts along the B-B line in <FIG>. <FIG> is an enlarged view of the portion VI enclosed by a dashed line in <FIG>.

As illustrated in <FIG>, the timepiece <NUM> of the present embodiment has a device case <NUM>.

The device case <NUM> of the present embodiment is formed in the shape of a short tube that is open at the top and the bottom (a front side and a back side of the timepiece <NUM>). The hollow space inside the device case <NUM> constitutes a space to house various parts.

The device case <NUM> is formed of a relatively hard synthetic resin such as, for example, a biomass plastic, engineering plastic, or super engineering plastic. The materials used to form the device case <NUM> are not limited to those exemplified here, but preferably include various resin materials having a high relative permittivity, as described later.

The device case <NUM> has a pair of band attachment portions <NUM> (see <FIG>) where a band (not shown) is attached at the top and bottom positions (at the <NUM> o'clock and <NUM> o'clock positions of an analog timepiece) on the outer surface in <FIG>.

Also, on the left and right sides of the device case <NUM> in <FIG>, there are various operation buttons <NUM> (pushbuttons, crowns, etc.) for various input operations by a user.

As illustrated in <FIG> and <FIG>, a back cover <NUM> closes an opening of the device case <NUM> on the back side (a non-visible side of the timepiece). The back cover <NUM> may be formed integrally with the device case <NUM>.

The device case <NUM> has a bezel <NUM> as an exterior member surrounding the opening on the front surface side of the device case <NUM> (a visible side of the timepiece). The bezel <NUM> is fixed to the device case <NUM> with a screw(s) <NUM>, for example.

The bezel <NUM> is an almost annular member when the timepiece <NUM> is viewed from the viewing side. The direction from the visible side to the non-visible side of the timepiece <NUM> is hereinafter referred to as the "first direction I". The bezel <NUM> has a first region α having a layer of metal discontinuously deposited on a base including a resin material at least on the front surface, and a second region β formed so as to include a resin material (without discontinuous deposition of metal).

In the present embodiment, the bezel <NUM> includes a first bezel <NUM> formed of a resin material such as urethane, for example, and a second bezel <NUM> having, at least on the front surface, a layer where a metal is discontinuously deposited on a base including a resin material such as urethane. The portion of the second bezel <NUM> exposed on the front surface (visible side surface) is the first region α, and the portion of the second bezel <NUM> covered with the first bezel <NUM> and not appearing on the front surface (visible side surface) is the second region β.

Specifically, the first bezel <NUM> has a protrusion <NUM> that protrudes more than the other portions (the main body <NUM> of the first bezel <NUM>) at each of <NUM> o'clock, <NUM> o'clock, <NUM> o'clock, and <NUM> o'clock positions of an analog timepiece along the peripheral edge of the bezel <NUM>, as illustrated in <FIG> and the like. The protrusion <NUM> protrudes more than the main body <NUM> at least in the thickness direction of the timepiece <NUM> (upward in <FIG>, etc.) and in the radial outward direction of the bezel <NUM>.

All or part of the protrusion <NUM> can be attached to and detached from the main body <NUM> of the first bezel <NUM>.

In the present embodiment, for example, the second bezel <NUM> is arranged on top of the main body <NUM> with all or part of the protrusion <NUM> removed from the main body <NUM>. By subsequently attaching the removed protrusion <NUM> to the main body <NUM>, the integrated bezel <NUM> is formed with the second bezel <NUM> sandwiched between the main body <NUM> and the protrusion <NUM> of the first bezel <NUM>.

The bezel <NUM> formed with a resin material such as urethane can be lighter and formed more freely than by metal fabrication. In addition, when the bezel <NUM> of a resin material is provided as an exterior member of the timepiece <NUM>, the shock resistance of the timepiece <NUM> is also improved compared to a timepiece having a bezel formed of a metal material.

On the front surface of the second bezel <NUM>, a metal such as In (indium) is discontinuously deposited, for example. By the discontinuous deposition (thin layer deposition) of indium or the like, a metallic appearance is achieved, and spaces are created between the metal particles. As a result, the bezel <NUM> including the second bezel <NUM> do not block the radio waves even when arranged above an antenna <NUM> (see <FIG>, etc.), for example. A transparent coating of resin or the like may be further formed on the discontinuously deposited metal layer. In this case, further glossiness and scratch resistance can be achieved. In (indium) alloys sometimes peel off when struck or rubbed by an object. In this regard, a transparent coating of resin or the like formed on the front surface can prevent the metal layer of the discontinuous deposited In (indium alloy) or the like from peeling off even when the second bezel <NUM> is struck by surrounding objects during use. This ensures that the beautiful metallic appearance is maintained for a long time.

The metal to be discontinuously deposited is not limited to In (indium), but may be Sn (tin), various alloys, and the like.

The layer of discontinuously deposited metal may be formed on the entire surface of the second bezel <NUM>, or only on the portion that may be exposed to the outside.

The portion that may be exposed to the outside is the upper surface <NUM> and side surface <NUM> of the second bezel <NUM>. The discontinuous deposition of metal may be performed on the entire upper surface <NUM> and the side surface <NUM>, however, the portion of the upper surface <NUM> and the side surface <NUM> of the second bezel <NUM> that is sandwiched between the main body <NUM> and the protrusion <NUM> of the first bezel <NUM> is not exposed to the outside in an assembled state. Therefore, discontinuous deposition of metal may not be performed at such portions.

For example, <FIG> illustrates a cross-section along the A-A line in <FIG> in which the second region β is formed by the protrusion <NUM> of the first bezel <NUM> overlying the second bezel <NUM>. As illustrated in <FIG> and <FIG> and described above, the protrusion <NUM> of the first bezel <NUM> is arranged outside in the second region β, such that the second bezel <NUM> is sandwiched between the main body <NUM> and the protrusion <NUM> of the first bezel <NUM> and is not exposed outside. Therefore, at such a portion, discontinuous deposition of metal may not be performed on the upper surface <NUM> (front surface) and side surface <NUM> as well as on the back surface <NUM> of the second bezel <NUM>.

Thus, by not performing discontinuous deposition on the non-visible portion, the metal material to be deposited can be saved. Further, when discontinuous deposition is not performed on the non-visible portion (back surface <NUM>, etc.), work process is simplified because the deposition can be performed with the second bezel <NUM> arranged on a table with the back surface <NUM> and the like facing down, for example.

In contrast, <FIG> illustrates a cross-section along the B-B line in <FIG> in which the first region α where the upper surface <NUM> (front surface) and the side surface <NUM> of the second bezel <NUM> are exposed to the visible side.

The first region α and the second region β are arranged alternately along the peripheral direction of the bezel <NUM>.

Specifically, as illustrated in <FIG>, in the present embodiment, the protrusions <NUM> constituting the second regions β are almost equally spaced along the peripheral direction of the bezel <NUM>, and the first regions α are arranged between the protrusions <NUM> constituting the second regions β. The protrusions <NUM> constituting the second regions βare formed so that their upper surface height is at least higher than the upper surface height of the first regions α, where the second bezel <NUM> is exposed. Therefore, the exposed second bezel <NUM> can be protected from external shocks and the like, and the metallic appearance of the bezel <NUM> can be prevented from being damaged.

In the present embodiment, the upper surface <NUM> and the side surface <NUM> that may be exposed to the outside in the second bezel <NUM> are V-grooved (cutting mark (record) finish, hairline finish, etc.), for example, and have concentric circular grooves 22a. This can produce a more metallic texture when the metal is discontinuously deposited.

<FIG> is an enlarged view of the portion VII surrounded by a dashed dotted line in <FIG>. <FIG> is a cross-section along the C-C line in <FIG> is a schematic illustration of the cross-section at the C-C line and does not accurately represent the shape, number, depth, etc. of the grooves 22a.

When the bezel <NUM> (second bezel <NUM>) has the concentric circular V-grooves, an edge of the cross-section along the radial direction of the bezel <NUM> has unevenness, which deteriorates the appearance and touch feeling of the bezel <NUM>. Therefore, in the present embodiment, as illustrated in <FIG>, a wall <NUM> is provided to prevent unevenness from appearing on the exposed edge. The wall <NUM> walls around the V-grooved portion (such as the side surface <NUM> of the second bezel <NUM> where the grooves 22a are formed) so that the V-grooves are not exposed at the outer edge. The method of V-grooving to form the grooves 22a and forming the wall <NUM> is not particularly limited, but for example, molding can be performed using a mold having a shape corresponding to the grooves 22a and the wall <NUM>.

<FIG> illustrates an example of the wall <NUM> having a height enough to hide about half of the cross section of the V-grooves of the groove 22a. However, the height of the wall <NUM> is not limited to this. For example, the wall may be high enough to hide the entire cross section of the V-groove.

In the present embodiment, the second bezel <NUM> includes two members as illustrated in <FIG>. However, the second bezel <NUM> is only required to be sandwiched between the main body <NUM> and the protrusion <NUM> of the first bezel <NUM>, and may be a single member that is almost annular, C-shaped, U-shaped, and the like when viewed from the first direction I (from the visible side, see <FIG>, <FIG>, and the like). Alternatively, the second bezel <NUM> may include more than two smaller members, such as four members.

The protrusions <NUM> are not limited to being arranged in the locations illustrated here. The protrusions <NUM> are preferably almost equally spaced along the peripheral direction to ensure that the exposed portion of the second bezel <NUM> having a metallic appearance (first region α) is protected. The protrusions <NUM> is only required to be arranged in multiple locations along the peripheral direction of the bezel <NUM>, for example, they may be arranged in three locations. The protrusions <NUM> do not have to be detachable from the main body <NUM>. The protrusions <NUM> do not have to be individually attachable to and detachable, from the main body <NUM>, but may be connected together and attachable to and detachable from the main body <NUM> as a single unit.

In the present embodiment, the bezel <NUM> has the first bezel <NUM>, on which no metal is discontinuously deposited, in addition to the second bezel <NUM> having the metallic appearance, and the first bezel <NUM> protects the portion (first region α) where the metallic appearance is exposed. However, the bezel <NUM> may not have the first bezel <NUM> as long as the discontinuously deposited metal layer of indium alloy or the like has improved adhesion and is difficult to peel off.

In the present embodiment, the bezel <NUM> that surrounds the opening on the front surface side of the device case <NUM> is made of a resin material <NUM> such as urethane. Therefore, when the timepiece <NUM> receives a shock from the outside, the bezel <NUM> absorbs the shock and effectively prevents the device case <NUM>, timepiece movement accommodated inside the device case <NUM> (for example, a circuit board <NUM> and a liquid crystal panel unit <NUM> described later and various motors not shown in the drawing), and the like from being damaged.

In the example described in the present embodiment, the member constituting the second regions β (the first bezel <NUM> with protrusions <NUM>) and the member constituting the first regions α (the second bezel <NUM> with metallic texture at least on the exposed portions) are separate members. However, the bezel with the second regions β and the first regions α may be formed integrally and partially processed to have a metallic texture.

The opening on the front surface (the visible side of the timepiece) of the device case <NUM> is closed with a windshield <NUM>. The windshield <NUM> is a transparent member made of, for example, a glass material, a transparent resin material, or the like. The windshield <NUM> is preferably attached to the device case <NUM> via a resin waterproof ring or the like. Thereby, waterproofness (airtightness) in the device case <NUM> can be ensured.

<FIG> is a cross-sectional view of the timepiece with the bezel <NUM> removed.

In the present embodiment, as illustrated in <FIG>, a solar panel <NUM> is affixed to the back surface side of the windshield <NUM> (that is, the side arranged inside the device case <NUM>).

The solar panel <NUM> is a photovoltaic cell that receives light to generate electric power. The electric power generated by the photovoltaic generation by the solar panel <NUM> is stored in the secondary battery accommodated in the device case <NUM> and is used to power various parts of the timepiece <NUM>.

In the present embodiment, the solar panel <NUM>, the antenna <NUM> (described later), and the circuit board <NUM> are arranged in this order from the first direction I, the thickness direction of the timepiece <NUM> that is almost orthogonal to the surface of the circuit board <NUM>. That is, the antenna <NUM> is in the first direction I of the solar panel <NUM>, and the circuit board <NUM> is in the first direction I of the antenna <NUM>. The solar panel <NUM> is arranged so as to overlap the antenna <NUM> at least in part in a plan view in the first direction I.

<FIG> is a plan view of the solar panel in the present embodiment.

As illustrated in <FIG>, the solar panel <NUM> of the present embodiment is a hollow circular (ring-shaped) panel having at least an outer peripheral edge 40a and an inner peripheral edge 40b in the plan view in the first direction I.

In the present embodiment, the solar panel <NUM> includes a plurality of cells <NUM> with division lines <NUM> between them and each having a shape of an almost annular sector. The division lines <NUM> are along the radial direction of the ring-shaped solar panel <NUM> and almost equally spaced along the peripheral direction of the solar panel <NUM>. The solar panel <NUM> includes eight cells <NUM> in the illustrated example, but the number of cells <NUM> constituting the solar panel <NUM> is not particularly limited. The plurality of cells <NUM> constituting the solar panel <NUM> are connected in series and are further connected to the circuit board <NUM> (see <FIG>, <FIG>, etc.) at the contact portion <NUM> described later.

<FIG> is an explanatory diagram schematically illustrating a connection between the solar panel <NUM> and the circuit board <NUM>.

As illustrated in <FIG>, the solar panel <NUM> and the circuit board <NUM> are connected with at least one board-panel contact member <NUM> (panel contact member) between the contact portion <NUM> of the solar panel <NUM> and a connection terminal for solar panel (pad, not shown in the drawings) of the circuit board <NUM>. In the present embodiment, two board-panel contact members <NUM> are provided as illustrated in <FIG>.

The board-panel contact members <NUM> are coil springs, for example, each having one end in electrical contact with the solar panel <NUM> and the other end in electrical contact with the circuit board <NUM>.

As illustrated in <FIG> and the like, the antenna <NUM> is arranged between the solar panel <NUM> and the circuit board <NUM> in the present embodiment. The board-panel contact members <NUM> are arranged so as to overlap the solar panel <NUM>, the antenna <NUM>, and the circuit board <NUM> in the plan view from the first direction I.

Specifically, as schematically illustrated in <FIG>, holes <NUM> penetrating the device case <NUM> from top to bottom are formed corresponding to the positions where the board-panel contact members <NUM> are arranged. The board-panel contact members <NUM> are inserted into these holes <NUM> and are positioned and held so that their respective ends are in contact with the solar panel <NUM> and the circuit board <NUM>. As described later, the antenna <NUM> has notches <NUM> to avoid the portions where the board-panel contact members <NUM> are arranged.

The antenna <NUM> in the present embodiment is, for example, a GPS antenna that can receive GNSS (GPS/GLONASS/QZSS/SBAS) signals from satellites. Hereafter, the term "GPS" includes not only GPS but also other systems such as GLONASS. The GPS satellite has an atomic clock and transmits data including time information based on the atomic clock. The timepiece <NUM> receives GNSS (GPS) signals transmitted from the GPS satellite with the antenna <NUM> to obtain extremely accurate time information at any receiving point on the earth.

The antenna <NUM>, which is a GPS antenna that receives GNSS (GPS) signals, needs to be able to receive right-handed polarization among circularly polarized waves.

GPS satellites transmit GNSS (GPS) signals in frequencies in the L1 band (around <NUM>), the L5 band (around <NUM>), and the like. Therefore, the L1 band, L5 band, etc. are desired frequency bands for GPS antennas that receive GNSS (GPS) signals. The antenna <NUM> is desired to have high antenna performance (antenna gain corresponding to right-handed polarization in particular) for these frequency bands.

<FIG> is the plan view of the antenna <NUM> of the present embodiment viewed from the first direction. <FIG> is a perspective view of the antenna <NUM>. <FIG> is a side view of the antenna <NUM> viewed from a second direction II in <FIG> that is different from the first direction I.

As illustrated in <FIG> and the like, the antenna <NUM> (antenna element of the antenna <NUM>) has an almost annular shape having at least an outer peripheral edge 60a and an inner peripheral edge 60b in the plan view from the first direction I. The material of the antenna <NUM> is not particularly limited. A metal material having lower electrical volume resistivity is more preferably used in forming high-frequency antenna elements. In some cases, electronic devices such as the timepiece <NUM> (electronic timepieces, etc.) may have a geomagnetic sensor. Considering the effects on the geomagnetic measurement, a non-magnetic material is more preferably used. From this viewpoint, for example, phosphor bronze is preferably used as the material of the antenna <NUM> (antenna element). The function as an antenna is realized when high-frequency current flows through this annular antenna <NUM> (antenna element) and the circuit board <NUM> (GND board).

As illustrated in <FIG>, the antenna <NUM> (antenna element) of the present embodiment includes a top plate <NUM> whose main surface is visible in the plan view from the first direction I and a side wall <NUM> that is connected to at least a part of the top plate <NUM> and extending along the first direction I. The side wall <NUM> extends from at least a part of the outer edge of the top plate <NUM> almost in the first direction I. The main surface of the side wall <NUM> is visible from the second direction II, which is different from the first direction I. Specifically, the antenna <NUM> includes the annular top plate <NUM> and the side wall <NUM> that is hung from the outer edge of the top plate <NUM> and is visible from the second direction II. In the present embodiment, the second direction II is almost orthogonal to the first direction I and from the outer side of the timepiece <NUM>.

The antenna <NUM> (antenna element) having a large surface area is advantageous from the viewpoint of radio wave radiation.

The antenna <NUM> having the top plate <NUM> and the side wall <NUM> as in the present embodiment is preferable from the viewpoint of radio wave radiation because it provides sufficient surface area without increasing the diameter of the entire antenna <NUM>, compared to an antenna with only either a flat portion at the top (top plate <NUM>) or only a ring (side wall <NUM>).

As described later, the circuit board <NUM> is located below the antenna <NUM>. When the antenna <NUM> (antenna element) and the circuit board <NUM> are arranged in parallel, capacitive coupling is likely to occur, which has a negative effect on radio wave radiation. In this regard, the side wall <NUM> is arranged almost orthogonal to the circuit board <NUM>, thus causing less capacitive coupling. This allows the surface area of the antenna <NUM> (antenna element) to increase while capacitive coupling is suppressed.

However, the inner perimeter (length of one round around the inner peripheral edge) of the antenna <NUM> (antenna element) having the top plate <NUM> in addition to the side wall <NUM> is shorter than that of an antenna consisting of the side wall only (that is, the antenna <NUM> has a shorter inner diameter). As a result, the electrical distance (electric length) becomes shorter in the antenna <NUM>.

The resonant frequency of the antenna <NUM> (antenna element) is inversely proportional to the size and length (length of one round around the inner peripheral edge) of the antenna <NUM> (antenna element). When the electrical length is short, the frequency that is easily received and/or radiated by the antenna <NUM> tends to be higher than the frequency band that is desired to be received by the antenna <NUM> of the present embodiment. The desired frequency band is, as mentioned above, the L1 band (around <NUM>), L5 band (around <NUM>), etc., where GNSS (GPS) signals are transmitted.

Therefore, in the present embodiment, by making the shape of the element on the inner diameter side of the antenna <NUM> not a perfect circle but irregular, the inner perimeter of the antenna <NUM> (antenna element) is increased, so that the electrical length is increased. Specifically, the distance from the almost center of the annulus (referred to as the "annular center cp") in the plan view from the first direction I varies depending on the position on the inner peripheral edge 60b.

Specifically, as illustrated in <FIG>, the antenna <NUM> of the present embodiment has at least one latch <NUM> at the inner peripheral edge 60b and a protruding edge <NUM> protruding inward of the inner peripheral edge 60b than the latch <NUM>.

As illustrated in <FIG> and the like, the liquid crystal panel unit <NUM> constituting the display of the timepiece is accommodated in the device case <NUM> of the timepiece <NUM>. The basic shape of the inner periphery of the antenna <NUM> is along the glass of the liquid crystal panel unit <NUM>. The position of the inner peripheral edge in this basic shape is defined as a predetermined "reference position".

Thus, the basic shape of the inner peripheral edge of the antenna <NUM> (antenna element) corresponds to the shape of the glass of this LCD panel unit <NUM> and is shaped inward (toward the annular center cp side in <FIG>) such that the area of the antenna <NUM> is increased as much as possible.

The inner peripheral edge 60b of the antenna <NUM> has a "first notch <NUM>" that is notched toward a direction away from the annular center cp than the "reference position". The latch <NUM> is provided within this "first notch <NUM>" (for example, on the side of the "first notch <NUM>"that is close to the outer peripheral edge 60a of the antenna <NUM>).

The protruding edge <NUM> is a portion that protrudes relatively inward (toward the annular center cp side in <FIG>) by having the latch <NUM> provided in the "first notch <NUM>".

The protruding edge <NUM> may be at the same position as the "reference position" that is along the glass of the liquid crystal panel unit <NUM>, or may protrude inwardly to a position closer to the annular center cp than the "reference position".

As illustrated in <FIG>, the distance d1 from the annular center cp to the protruding edge <NUM> (for example, the shortest distance from the annular center cp) is shorter than the distance d2 from the annular center cp to the side of the "first notch <NUM>" closest to the outer peripheral edge 60a of the antenna <NUM>.

Thus, the first notch <NUM> and the protruding edge <NUM> on the inner peripheral edge 60b make uneven portions having different distances from the annular center CP, such that the inner perimeter of the antenna <NUM> (antenna element) is increased, and the electrical length is increased. Thereby, even when the antenna <NUM> as a whole has a short diameter to reduce its size, the antenna <NUM> can be easily configured to receive radio waves in the desired frequency band.

The antenna <NUM> and the device case <NUM> are locked with the latch <NUM> on the inner peripheral edge 60b of the antenna <NUM>.

As illustrated in <FIG>, the latch <NUM> of the present embodiment is arranged in three portions spaced in the peripheral direction along the inner peripheral edge 60b of the antenna <NUM> (antenna element).

As illustrated in <FIG> and the like, the latch <NUM> is a tongue-like piece that is formed on the edge of the first notch <NUM> at the top plate <NUM> and bent toward the first direction I and has a latch hole(s) 63a. The size of the latch <NUM> and the latch hole 63a also contribute to increasing the inner perimeter of the antenna <NUM> (antenna element), and the electrical length is expected to be increased.

<FIG> is the plan view of the device case <NUM> in which the antenna <NUM> is incorporated, viewed from the first direction I. <FIG> is an enlarged perspective view of main parts at the portion B surrounded by a dashed dotted line in <FIG> is an enlarged perspective view of main parts at the portion C surrounded by a dashed dotted line in <FIG>.

As illustrated in <FIG>, the device case <NUM> has a catch protruding inward of the device case <NUM> at a position corresponding to the latch <NUM> of the antenna <NUM>. By providing the catch at a position protruding inward of the device case <NUM> in this way, the device case <NUM> can be thick and strong at least at that portion.

In the present embodiment, the catch of the device case <NUM> includes a recess <NUM> and a hook <NUM>. The recess receives the tongue-shaped latch <NUM>. The hook <NUM> protrudes from the recess <NUM> and is locked to the latch hole 63a of the latch <NUM> when the latch <NUM> is inserted into the recess <NUM>. The hook <NUM> has some elasticity. When the antenna <NUM> is placed in the device case <NUM> from above (along the first direction I) and the latch <NUM> is inserted into the recess <NUM>, the hook <NUM> bends somewhat to avoid the inserted latch <NUM>. Once fitted into the latch hole 63a, the hook <NUM> cannot easily be pulled out.

In this way, as the catch on the device case <NUM> and the latch <NUM> of the antenna <NUM> are locked, the antenna <NUM> is fixed to the device case <NUM>. The configuration of the latch <NUM> of the antenna <NUM> and the catch of the device case <NUM> is not limited to those shown here.

Further, as described above and illustrated in <FIG>, <FIG>, the holes <NUM> through the device case <NUM> from top to bottom are formed at portions where the board-panel contact members <NUM> that connect the solar panel <NUM> and the circuit board <NUM> are arranged. In the present embodiment, two board-panel contact members <NUM> are provided, and two holes <NUM> are also formed on the device case <NUM> accordingly.

The notch <NUM> at the inner peripheral edge 60b of the antenna <NUM> is formed in each of the portions where the holes <NUM> are formed such that the antenna <NUM> avoids the portion where the board-panel contact members <NUM> are arranged. The notch <NUM> also forms uneven portions at the inner peripheral edge 60b of the antenna <NUM>, such that the inner perimeter of the antenna <NUM> (antenna element) is increased, and the electrical length is increased.

The electronic devices such as the timepiece <NUM> (electronic timepieces) are expected to be worn on a person's arm or other parts of the body and are generally desired to be miniaturized to improve usability and the like. Therefore, in the present embodiment, the antenna <NUM> is miniaturized so as to be housed inside the device case <NUM> as mentioned above.

Specifically, for example, when the antenna <NUM> tends to be arranged close to the board-panel contact members <NUM> due to the miniaturization of the antenna <NUM>, the members are likely to be electrically coupled, and the respective resistive components cause losses (resulting in a reduction of antenna gain).

In this regard, in the present embodiment, the notch(es) <NUM> is formed on the antenna <NUM> such that the antenna <NUM> avoids the portion(s) where the board-panel contact member(s) <NUM> are arranged. The board-panel contact members <NUM> are coil springs provided at portions where the notched <NUM> are formed and connect the solar panel <NUM> and the circuit board <NUM>. This suppresses the electrical coupling between the members and the loss caused by respective resistive components (reduction of antenna gain).

Electrical coupling is also likely to result from an electrical loop from solar panel <NUM>, through one of the board-panel contact members <NUM>, the circuit board <NUM> (connection terminal for the solar panel on the circuit board <NUM>), and the other board-panel contact member <NUM> in that order, and back to solar panel <NUM>. However, the electrical coupling due to such an electrical loop can also be suppressed by the board-to-panel contact members <NUM>, which are coil springs arranged in the notches <NUM> and connecting the solar panel <NUM> and the circuit board <NUM>, and the notches <NUM>, which are formed such that the antenna <NUM> avoids where the board-panel contact members <NUM> are arranged.

Further, as illustrated in <FIG> and the like, a groove <NUM> is formed in the device case <NUM> that receives (accommodates) at least the side wall <NUM> when the antenna <NUM> (antenna element) is arranged in the device case <NUM>. As a result, at least a part of the side wall <NUM> (that is, at least a part of the inner surface, the outer surface, and the bottom surface of the side wall <NUM>) is in contact with the device case <NUM>.

In the present embodiment, the groove <NUM> has a shape almost corresponding to the side wall <NUM> of the antenna <NUM> such that the side wall <NUM> of the antenna <NUM> fitted into the groove <NUM> closely contacts the groove <NUM> of the device case <NUM>.

When the antenna <NUM> (antenna element) is miniaturized more, the electrical distance (electrical length) becomes shorter (smaller), thereby the radiation efficiency of the antenna <NUM> becomes weaker. This causes the problem of the antenna <NUM> not functioning properly. In this regard, by fitting the side wall <NUM> of the antenna <NUM> into the groove <NUM> of the device case <NUM> and by making the antenna <NUM> and the resin device case <NUM> that is a dielectric in close contact (close contact), the decrease in the radiation efficiency of the antenna <NUM> can be suppressed.

In addition, antennas with a length and size that better match the frequency and wavelength of radio waves are generally considered to be more efficient (have improved antenna performance).

However, as described above, when the size and length of the antenna <NUM> (antenna element) are reduced in order to accommodate the antenna <NUM> in the device case <NUM>, the electrical distance (electrical length) is shortened, and the frequency that is easily received and/or radiated by the antenna <NUM> tends to be higher than the frequency band that is desired to be received by the antenna <NUM>. The desired frequency band is, as mentioned above, the L1 band (around <NUM>), L5 band (around <NUM>), etc., where GNSS (GPS) signals are transmitted.

In this regard, the antenna <NUM> (antenna element) surrounded by a dielectric such as a resin material is known to shorten the wavelength of radio waves compared to an antenna <NUM> (antenna element) in the air, depending on its relative dielectric constant. That is, as in the explanatory diagram illustrated in <FIG>, a "radio wave wavelength shortening" effect is observed in the dielectric, in which the length of one cycle of the wavelength itself (the length of one wavelength) is shortened.

The device case <NUM> of the embodiment is a case made of a resin material. More specifically, a resin case in which a substance that increases the relative dielectric constant is blended as a part of the material is preferably used. Therefore, when the antenna <NUM> (antenna element) is attached as closely as possible to the device case <NUM>, an effective "radio wave wavelength shortening" effect can be achieved. In this way, even when the antenna <NUM> (antenna element) is miniaturized, it can resonate in a lower frequency band (the desired frequency band such as the above-mentioned L1 band, L5 band, and the like).

Therefore, the shape (width, depth, etc.) of the groove <NUM> of the device case <NUM> preferably corresponds to the shape of the side wall <NUM> of the antenna <NUM> as much as possible, and the antenna <NUM> (antenna element) and the device case <NUM> are configured to closely (closely) fit together when the side wall <NUM> is fitted into the groove <NUM>. That is, when the side wall <NUM> is fitted into the groove <NUM>, it is desirable that the inner surface, the outer surface, and the bottom surface of the side wall <NUM> are in perfect contact with the inner surface of the groove <NUM>.

Further, when the antenna <NUM> is arranged in the device case <NUM>, at least a part of the lower surface of the top plate <NUM> is in contact with the device case <NUM>. Here, when the depth of the groove <NUM> corresponds to the height of the side wall <NUM> such that fitting of the side wall <NUM> into the groove <NUM> leads to an arrangement of the top plate <NUM> in contact with the upper surface of the device case <NUM> without lifting, the "radio wave wavelength shortening" effect can be achieved in the same way.

Furthermore, for the same reason, the latch <NUM> and the catch of the device case <NUM> are preferably attached (closely adhered) to each other with as little gap as possible at their locking portion.

Also, when the antenna <NUM> (antenna element) and the device case <NUM> are attached (closely adhered) to each other, the effect of suppressing the decrease in radiation efficiency of the antenna <NUM> can be expected as well by the synergistic effect of the antenna <NUM> and the device case <NUM> that is a dielectric.

When a dielectric (resin material) fills the area around the antenna <NUM>, the antenna <NUM> (antenna element) can resonate in a lower frequency band even when the antenna <NUM> (antenna element) is miniaturized. From this point of view, a dielectric such as a resin material is preferably arranged also on the lower surface side (the back surface side, the side facing the inside of the device case <NUM>, the side facing the inside of the device case <NUM>, the side to which the solar panel <NUM> is affixed in the present embodiment) of the windshield <NUM>, for example, to fill the gap between the antenna <NUM> (antenna element) and the windshield <NUM>.

The dielectric (resin material) arranged around the antenna <NUM> and filling in the gaps is expected to further shorten the wavelength and improve the antenna performance in lower frequency bands (desired frequency bands such as L1 and L5 bands) when a small antenna <NUM> is used.

The antenna <NUM> (antenna element) is connected to the circuit board <NUM> via a board-antenna contact member <NUM> (antenna contact member).

<FIG> is a schematic side view of main parts illustrating a connection portion of the antenna <NUM> and the circuit board <NUM>. The board-antenna contact member <NUM> is, for example, a coil spring or a pogo pin having a spring inside. One end of the board-antenna contact member <NUM> is in pressure contact with the top plate <NUM> of the antenna <NUM> (antenna element), and the other end is in contact with a GPS circuit (not shown) of the circuit board <NUM>.

The top plate <NUM> of the antenna <NUM> is in contact with the board-antenna contact member <NUM> to be connected to the circuit board <NUM>. Therefore, since the contacts regarding the connection of the antenna <NUM> and the circuit board <NUM> are located in the thickness direction of the timepiece <NUM> (vertical direction), the contact pressure at the contacts of the antenna <NUM> and the circuit board <NUM> can be sufficiently secured.

The number of the antenna contact members <NUM> needs only to be one or more, and may be three or more. <FIG> and the like illustrates an example of the board-antenna contact members <NUM> at two respective locations.

The top plate <NUM> of the antenna <NUM> may be pushed up by the board-antenna contact member <NUM> at the point where the board-antenna contact member <NUM> including the spring strikes. For this reason, as illustrated in <FIG> and the like, the position where the board-antenna contact member <NUM> is arranged is preferably near the locking position where the latch <NUM> that locks the antenna <NUM> and the device case <NUM> is provided.

It is also confirmed that the gain (gain characteristics) of the antenna <NUM> changes depending on the shape of the antenna <NUM> (antenna element).

The (+)x direction of the antenna <NUM> (antenna element) illustrated in <FIG> is the direction from the <NUM> o'clock position to the <NUM> o'clock position of the timepiece <NUM>, and the (+)y direction is the direction from the <NUM> o'clock position to the <NUM> o'clock position. The case where the feeding point is located between the <NUM> o'clock and <NUM> o'clock positions as illustrated in <FIG>, etc. (i.e., a position rotated <NUM> degrees counterclockwise from the y direction, between the -x and y directions) is described in the following. For example, when the ±y-direction side of the antenna <NUM> (antenna element) is cut off, the gain (characteristics of gain) of the antenna <NUM> changes depending on the cut-off condition.

For example, in <FIG>, a part of the side wall <NUM> on the <NUM> o'clock side (+y direction) of the antenna <NUM> is cut off to form a notch <NUM>, and a part of the side wall <NUM> on the <NUM> o'clock side (-y direction) is cut off to form a notch <NUM>. The notches <NUM> and <NUM> formed on the side wall <NUM> are referred to as "third notches".

On the other hand, in <FIG>, only a part of the side wall <NUM> on the <NUM> o'clock side (+y direction) of the antenna <NUM> is cut off to form a notch <NUM>, and no notch is formed on the side wall <NUM> on the <NUM> o'clock side. The antenna (antenna element) having the shape illustrated in <FIG> is referred to as "Comparative Example <NUM>".

For example, in <FIG>, a part of the side wall <NUM> on the <NUM> o'clock side (-y direction) of the antenna <NUM> is cut off to form the notch <NUM> (third notch), and a part of the top plate <NUM> on the <NUM> o'clock side is cut off to form a notch <NUM>. The notch <NUM> formed on the top plate <NUM> is referred to as the "second notch". The antenna (antenna element) having the shape illustrated in <FIG> is referred to as "Comparative Example <NUM>".

The antenna <NUM> used in the present embodiment has a shape illustrated in <FIG> having the notches <NUM> and <NUM> as the "third notches" formed on the side wall <NUM> at the <NUM> o'clock side and <NUM> o'clock side that are in the ±y directions of the antenna <NUM>.

When the side wall <NUM> only at the <NUM> o'clock position on the -y direction side is partially cut out to form a notch <NUM> in the antenna <NUM> (antenna element) (in the case of the antenna shape shown in <FIG>), the antenna gain decreased in both the L5 band and the L1 band (average value) compared with the case where the side wall <NUM> at the <NUM> o'clock position and <NUM> o'clock position on the ±y direction are partially cut out to form the notches <NUM> and <NUM> (in the case of the antenna shape of the present embodiment shown in <FIG>).

When the side wall <NUM> only at the <NUM> o'clock position on the -y direction side is partially cut out to form a notch <NUM> and the top plate <NUM> at the <NUM> o'clock position on the +y direction is partially cut out to form a notch <NUM> in the antenna <NUM> (antenna element) (in the case of the antenna shape shown in <FIG>), the antenna gain did not change in the L5 band but decreased in the L1 band (average value) compared with the antenna of the present embodiment having the shape illustrated in <FIG>.

In this way, by slightly cutting the edges of the antenna <NUM> to make it not a perfect circle but shorter in the ±x direction, by making the ±y edges larger, or by changing the metal amount (metal volume) at a position rotated ±<NUM> degrees from the feeding point (feeding position), the shape of the antenna <NUM> (antenna element) can be adjusted so that the gain is high for the desired frequency band of radio waves.

Where and how to change the antenna <NUM> to achieve higher gain for radio waves in the desired frequency band can be adjusted depending on various conditions of the surroundings, such as the kind of metal parts arranged around the antenna <NUM> (antenna element).

The metal amount (metal volume) of the antenna <NUM> may be adjusted by providing a hole at least at a part of the antenna <NUM> (antenna element), instead of or in addition to the notch.

As mentioned above, the gain of the antenna <NUM> depends on various conditions, such as the metal parts arranged around the antenna <NUM>. The board-panel contact member <NUM> (coil spring (spring)) connecting the solar panel <NUM> and the circuit board <NUM> is arranged at a portion corresponding to the notch <NUM> formed in the inner peripheral edge 60b of the antenna <NUM>, as described above.

Although the shape and the like of the board-panel contact member <NUM> are not particularly limited, the configuration of the board-panel contact member <NUM> also affects the gain of the antenna <NUM>. Specifically, the gain of the antenna <NUM> is set based on any of a wire diameter, an effective number of turns, and a length of an elastic part of the coil spring (substrate-panel contact member <NUM>).

In other words, the large inductance (calculated inductance) of the coil spring (spring) as the substrate-panel contact member <NUM> has been confirmed to improve the gain of the antenna <NUM>.

Therefore, in the present embodiment, in the design of specifications (shape, etc.) of the coil spring, the inductance of the coil spring as the board-panel contact member <NUM> is made as large as possible.

In general, when the effective number [N] of turns and the length [mm] of the elastic part of the coil spring are the same, the smaller the wire diameter [mm] of the spring is, the smaller the inductance (calculated value L) is. Using this characteristic, it was found that as the inductance (calculated value L) decreases, the antenna gain of the right-handed polarization of the L5 band required as the GPS antenna decreases, and the antenna gain of the right-handed polarization of the L1 band (average value) required as the GPS antenna also decreases.

From this, it is confirmed that the gain of the antenna <NUM> is improved in both the L5 band and the L1 band when the inductance (calculated value L) of the coil spring (spring) as the board-panel contact member <NUM> is larger. This is considered to be because the larger inductance of the coil spring (spring) as the board-panel contact member <NUM> blocks the flow of high-frequency current and suppresses the lowering of the gain of the antenna <NUM>.

The solar panel <NUM> supplies low-frequency alternating (AC) current of a predetermined frequency or less or direct (DC) current. For this reason, even when the inductance of the coil spring (spring) as the board-panel contact member <NUM> is large, the current generated by the solar panel <NUM> is supplied to the circuit board <NUM> without being blocked, and the charging function by the solar panel <NUM> is not inhibited. The actual coil spring (spring) as the board-panel contact member <NUM> is preferably designed to meet various conditions, taking into consideration the stress and tension of the spring when contacting the solar panel <NUM> and the circuit board <NUM>.

Further, as illustrated in <FIG>, a shield <NUM> as a protective member is provided on the circuit board <NUM> in the present embodiment. The shield <NUM> is a protective member that covers at least a part of the circuit element (electronic component, not shown) on the circuit board <NUM>. The shield <NUM> is formed in a box shape made of sheet metal, for example, and its side wall is fixed to the circuit board <NUM>.

The method of fixing the shield <NUM> to the circuit board <NUM> is not limited. The shield <NUM> may be soldered directly onto the circuit board <NUM>, or it may be fixed to the circuit board <NUM> via other metal parts, and the like. In any case, the shield <NUM> is in direct or indirect contact with the circuit board <NUM> as ground (GND) at the side wall and has the same potential as the GND.

In the present embodiment, as described above, the antenna <NUM> (antenna element) has the top plate <NUM> and the side wall <NUM> and is advantageous from the viewpoint of radio wave radiation when the surface area is large. For this reason, especially in the plan view from the first direction I, the annular top plate <NUM> is formed as large as possible by protruding toward the annular center cp. Therefore, the top plate <NUM> and the circuit board <NUM> are almost in parallel and facing each other, and when in close proximity, they tend to capacitively couple as if they were "parallel plate capacitors".

In this regard, since the shield <NUM> covers the circuit element so as to surround it, the surface (upper surface) of the shield <NUM> is arranged at a position higher than the surface (upper surface) of the circuit board <NUM>. As a result, the surface (upper surface) of the shield <NUM> is closer to the antenna <NUM> (antenna element) than the surface (upper surface) of the circuit board <NUM> itself.

When the shield <NUM> having the same potential as the ground and the antenna <NUM> (in particular, the top plate <NUM>) are almost in parallel and close to each other, they tend to be capacitively coupled like a "parallel plate capacitor". This is not preferred because the performance (antenna efficiency) of the antenna <NUM> is greatly deteriorated when capacitive coupling becomes large.

For this reason, in the present embodiment, the antenna <NUM> and the shield <NUM> are arranged so as not to overlap each other in the plan view from the first direction I that is orthogonal to the surface of the circuit board <NUM>. Thus, it is avoided that the antenna <NUM> and the shield <NUM> are in an almost parallel position.

<FIG> is the plan view of a configuration example inside the timepiece (example of arrangement of the shield, etc.) from the first direction I. <FIG> shows an arrangement on the circuit board <NUM> from which the bezel <NUM>, windshield <NUM>, etc. have been removed.

As illustrated by dashed lines in <FIG>, none of the shields <NUM> provided on the circuit board <NUM> are arranged so as to overlap the antenna <NUM> when viewed in the plan view from the first direction I. More specifically, as described above, the antenna <NUM> has at least an outer peripheral edge 60a and an inner peripheral edge 60b in the plan view from the first direction I, but the shield <NUM> is arranged inside the inner peripheral edge 60b in the plan view from the first direction I.

It was confirmed that the antenna efficiency of the circuit board <NUM> with the shield <NUM> arranged in this way is almost no worse than that of the circuit board <NUM> without the shield <NUM>.

The shield <NUM> arranged in the position illustrated in <FIG> does not overlap even the device case <NUM> in the plan view from the first direction I.

Thereby, it is possible to prevent the capacity coupling between the antenna <NUM> and the shield <NUM> more reliably.

The shield <NUM> as the protective member may have an upper surface that is at least partially inclined with respect to the circuit board <NUM>.

For example, when viewed in the plan view from the first direction I, the upper surface of the shield <NUM> lower in height is the farther from the center (annular center cp) of the antenna <NUM> (antenna element) in the plan view from the first direction I. In this case, the antenna <NUM> and the shield <NUM> are less likely to cause capacitive coupling.

Therefore, it is preferable to adjust the design when the shield <NUM> is provided on the circuit board <NUM>. For example, the shape of the shield <NUM> is preferably designed so as not to overlap the antenna <NUM>. Alternatively, at a portion where the shield <NUM> needs to be placed due to the presence of a circuit element to be protected, the antenna <NUM> is preferably designed to be cut off, for example, at a portion overlapping the shield <NUM> in the plan view from the first direction I so as to avoid the position where the shield <NUM> is arranged.

As described above, in the timepiece <NUM> that is an electronic device in the present embodiment, the solar panel <NUM>, the antenna <NUM>, and the circuit board <NUM> are assembled into the device case <NUM> so as to be arranged in this order along the first direction I that is orthogonal to the surface of the circuit board <NUM>.

In order that the circuit board <NUM> and the solar panel <NUM> contact each other, the solar panel <NUM> is arranged so as to overlap the antenna <NUM> at least in part in the plan view from the first direction I.

The antenna <NUM> has the notch <NUM> at the position corresponding to the board-panel contact member <NUM> that makes contact between the circuit board <NUM> and the solar panel <NUM>, so that the antenna <NUM> avoids the portion where the board-panel contact member <NUM> is arranged. Therefore, the board-panel contact member <NUM> can be arranged without interfering with the antenna <NUM>.

As described above, the timepiece <NUM> that is an electronic device in the present embodiment includes the circuit board <NUM>, the annular antenna <NUM>, the solar panel <NUM>, and at least one board-panel contact member <NUM> that connects the solar panel <NUM> and the circuit board <NUM>. The antenna <NUM> has an annular shape having at least the outer peripheral edge 60a and the inner peripheral edge 60b in the plan view from the first direction I and has the notch <NUM> in part. The solar panel <NUM>, the antenna <NUM>, and the circuit board <NUM> are arranged in this order along the first direction I that is orthogonal to the surface of the circuit board <NUM>. The solar panel <NUM> is arranged so as to overlap the antenna <NUM> at least in part in the plan view from the first direction I. The board-panel contact member <NUM> is arranged at a position corresponding to the notch <NUM> of the antenna <NUM>.

The electronic device such as the timepiece <NUM> accommodates various parts. Therefore, when the electronic device is miniaturized, these various parts must be arranged in a complex manner.

In particular, when relatively large parts such as the antenna <NUM> (antenna element) and the solar panel <NUM> are miniaturized, the complex arrangement is likely to cause losses due to contact of the board-panel contact member <NUM> (coil spring and the like) with the antenna <NUM> and the solar panel <NUM> and reduce electrical performance such as the antenna efficiency and solar power generation efficiency.

In this regard, in the present embodiment, a path such as the notch <NUM> is formed as appropriate considering the positional relationship of the parts arranged along the first direction I that is orthogonal to the surface of the circuit board <NUM>. This avoids interference between the parts even when the electronic device is miniaturized, thereby preventing a reduction of electrical performance, such as antenna efficiency and solar power generation efficiency due to the miniaturization.

When the board-panel contact member <NUM> is a coil spring, the connection structure can be simply configured. Specifically, the board-panel contact member <NUM> naturally connects the solar panel <NUM> and the circuit board <NUM> by the elastic force of the spring simply by being arranged between them.

Also, in the present embodiment, the antenna <NUM>, the board-panel connection member <NUM>, and the circuit board <NUM> are arranged so as to overlap the solar panel <NUM> in the plan view from the first direction I. The antenna <NUM> has the notch <NUM> to avoid the portion where the board-panel contact member <NUM> is arranged. Therefore, the board-panel contact member <NUM> can be easily in contact with the solar panel <NUM> and the circuit board <NUM> without interfering with the antenna <NUM>, simply by being arranged almost straight in the thickness direction (vertical direction) of the electronic device such as the timepiece <NUM>.

The timepiece <NUM> as the electronic device in which the solar panel <NUM> and the antenna <NUM> are incorporated can be made smaller as a whole than a timepiece having an exterior member as the antenna and can protect the antenna <NUM> from external shocks and corrosion, etc..

Even when the antenna <NUM> is accommodated in the device case <NUM> to miniaturize the electronic device, each part can be accommodated in the device case <NUM> so as not to interfere with each other simply by providing a path (notch <NUM>) in the antenna <NUM> corresponding to the position where the board-panel contact member <NUM> is arranged. Therefore, it is possible to suppress the reduction of electrical performance such as antenna efficiency and solar power generation efficiency due to the miniaturization of electronic devices.

For example, in the present embodiment, the electronic device is, but is not limited thereto, a timepiece <NUM>.

Electronic timepieces can be widely applied to any device with an antenna in it when used. For example, in addition to various types of smartwatches and sports watches, electronic device that record various types of data along with time, such as heart rate monitors and blood pressure monitors, can be used.

Claim 1:
An electronic device (<NUM>) comprising:
a circuit board (<NUM>);
an antenna (<NUM>) that has an annular shape in a plan view from a first direction (I), has at least an outer peripheral edge (60a) and an inner peripheral edge (60b), and has at least one of a notch (<NUM>) and a hole;
a solar panel (<NUM>); and
at least one contact member (<NUM>) that electrically connects the solar panel and the circuit board,
wherein the solar panel, the antenna, and the circuit board are arranged in order from the first direction, and
wherein the contact member is at a position corresponding to the at least one of the notch and the hole.