JP2003152582A - Arm-worn electronic equipment with radio function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide arm-worn electronic equipment having a radio function whose communication quality is high. SOLUTION: A chip antenna 17 is disposed in the neighborhood of an IC 15 for radio communication to minimize the wiring loss of a signal. Then, the disposed position of the chip antenna 17 is decided, so that the orthogonal projection of the chip antenna 17 can not be overlapped with the orthogonal projection of the IC 15 for radio communication by using a plane, which is almost in parallel with a circuit board 13 as a projection face. Thus, for preventing the chip antenna 17 and the IC 15 for radio communication from having electrical adverse influence on each other. Also, the ground terminal of the chip antenna 17 is connected to a back cover 10, constituted of conductive materials, with the ground area of the chip antenna 17 being enlarged for the area of the back cover 10, and that the antenna gain of the chip antenna 17 can be improved. As a result, the communication quality of arm mounted information equipment 1 can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrist-worn electronic device with a wireless function.

[0002]

2. Description of the Related Art Conventionally, unbalanced power feeding has been known as one of power feeding methods for antennas. The unbalanced power supply grounds a part of the antenna and uses the ground plane as a conductor.
In the operation mode of the unbalanced feeding antenna, it is ideal that no current flows in the ground plane. However, if the ground area is small, a current that cannot be ignored flows through the ground surface, and the operation mode of the unbalanced feed antenna is disturbed, which affects the operation of the antenna.

FIG. 11 is a diagram showing changes in return loss depending on the size of the ground area. The return loss is a parameter representing the antenna characteristics, and the smaller the value of the return loss, the smaller the power loss in the route from the feeder line to the antenna, and therefore it is preferable.
As shown in FIG. 11, when the ground area is small, the return loss increases and the antenna gain decreases.
On the other hand, when the ground area is large, the return loss is small and the antenna gain is improved. That is,
When using an antenna that is unbalancedly fed, it is desirable to have a large ground area.

[0004]

However, for example, when an electronic device with a wireless function, which is as small as a wristwatch, is provided with an antenna to which unbalanced power is fed, the device itself is small, so that a large ground area can be taken. Have difficulty. Therefore, in this type of electronic device, it is often difficult to sufficiently improve the antenna gain. Further, in this type of electronic device with a wireless function, when the components are stored inside the device, the respective components are close to each other, and it is difficult to store the antenna at a position where communication quality can be most improved. In view of the above problems, the present invention provides a wrist-worn electronic device with a wireless function, which has high communication quality.

[0005]

In view of the above-mentioned problems, the present invention provides an unbalanced power feeding antenna, a circuit board on which a wireless communication circuit for performing wireless communication through the antenna is arranged, and the antenna. And a case body accommodating the circuit board, the antenna is arranged at a position different from the circuit board, and a plane substantially parallel to the circuit board is a projection plane, and at least the orthogonal projection of the antenna is provided. Two
One of the features is to provide a wrist-worn electronic device with a wireless function, characterized in that one part thereof does not overlap with the orthogonal projection of the wireless communication circuit. With such a wrist-worn electronic device with a wireless function, it is possible to prevent the antenna and the wireless communication circuit from electrically adversely affecting each other and improve communication quality.

In a preferred embodiment, the wrist-worn electronic device with wireless function of the present invention forms a part of the case body, or a grounding part attached to the case body and made of a conductive material. Further, it further comprises a grounding mediating section for electrically connecting the antenna and the grounding section. By doing this, the area of the ground where the antenna is grounded is increased, the antenna gain is improved,
Communication quality can be improved. Moreover, in another preferable aspect, the said grounding part is provided in the site | part which contacts a human body. By doing so, the ground plane of the antenna can be electrically connected to the human body, and as a result, the ground plane of the antenna can be enlarged. Moreover, in another preferable aspect, the grounding portion is a back cover attached to the case body. By doing so, when enlarging the ground plane of the antenna, it is possible to utilize the parts that are normally provided in the wrist-worn electronic device with a wireless function. Moreover, in another preferable aspect, the grounding portion is a wristband attached to the case body.
By doing so, when enlarging the ground plane of the antenna, it is possible to utilize the parts that are normally provided in the wrist-worn electronic device with a wireless function. In another preferred aspect, the grounding mediating portion is made of a conductor material, is projected toward the grounding portion, and abuts on the grounding portion. By doing so, the antenna can be grounded to the ground portion regardless of the position where the antenna is arranged. In another preferred aspect, in the above-described wrist-worn electronic device with a wireless function, the antenna is arranged on a board different from the circuit board.
By doing so, it is possible to more easily prevent the radio communication circuit and the antenna from adversely affecting each other. In another preferred aspect, in the above-described wrist-worn electronic device with a wireless function, the substrate on which the antenna is arranged is a flexible substrate. By doing so, the degree of freedom in arranging the antennas is increased, and the storage efficiency of the space inside the device is improved. Therefore, the device can be made smaller. In another preferred aspect, in the above-described wrist-worn electronic device with a wireless function, the antenna is an inverted F-type antenna. Since the inverted F-type antenna has a wide directivity, it is possible to improve the radio wave reception performance of the electronic device with a wireless function. In another preferred aspect, in the above-described wrist-worn electronic device with a wireless function,
The antenna is a patch antenna. Since it has a strong directivity above it, G
It is possible to improve the reception sensitivity when receiving a signal such as PS. In another preferred aspect, in the above-described wrist-worn electronic device with a wireless function, the case body is composed of a non-shielding member that does not shield radio waves. By doing so, it is possible to prevent the outside of the device from being covered with a member that shields radio waves, such as a conductor material, and prevent the antenna from receiving radio waves. In another preferred aspect, the wrist-worn electronic device with a wireless function has a time display function. Generally, if the shape of the electronic device with wireless function is small, the ground area for grounding the antenna is small,
The effect of the present invention is exhibited when the device is about the size of a wristwatch.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION <1. First Embodiment> FIG. 1 is a sectional view showing a schematic configuration of a wristwatch type information device 1. Figure 1
As shown in FIG. 1, the wristwatch-type information device 1 includes a housing including a case back 10, a cover glass 11, and a casing (case body) 12. The back cover 10 is, for example,
It is made of a conductive material such as stainless steel, titanium or brass. The cover glass 11 is made of, for example, a transparent material such as crystal glass. Further, since the back cover 10 is made of a conductive material, the casing 12
If is made of a conductive material, the chip antenna 17 is completely covered with the conductive material, and it becomes impossible to receive radio waves. Therefore, the casing 12 is made of, for example, a non-conductive member such as a plastic material that does not prevent the passage of radio waves.

A circuit board 13 is provided inside the housing, for example,
It is fixed by a circuit frame 131 made of a non-conductive material such as a plastic material. On the circuit board 13,
A wireless communication IC 15 is provided. IC for wireless communication
15 performs near field communication processing based on a standard such as Bluetooth (registered trademark). In addition, the circuit board 13
Above the MPU (MicroProce
ssing Unit) 14 is provided. The MPU 14 realizes the function of the wristwatch-type information device 1 as a clock.

In the vicinity of the wireless communication IC 15,
The flexible board 16 is fixed to the circuit frame 131. The wireless communication IC 15 is provided on the flexible substrate 16.
There is provided a chip antenna 17 which is hard-wired to. In this way, by arranging the wireless communication IC 15 and the chip antenna 17 close to each other, the wireless communication IC 1
It is possible to minimize the wiring loss of signals transmitted and received between the chip 5 and the chip antenna 17.

Further, operating power is supplied from a battery 19 to each part of the wristwatch type information device 1. This battery 19
It may be a primary battery such as a coin type lithium battery or a secondary battery such as a lithium ion battery.
It is also possible to use, as the battery 19, a battery that utilizes the discharge of the capacitor.

FIG. 2 is a block diagram showing the electrical configuration of the wristwatch type information device 1. The oscillator 1210 generates a source oscillation signal having a reference frequency, and the reference signal generation circuit 12
Output to 1. The reference signal creation circuit 121 creates various reference signals used for the operation of each part constituting the wristwatch type information device 1 based on the source oscillation signal, and the central control circuit 11
Output to 4. The central control circuit 114 is configured in the MPU 14. The central control circuit 114 controls each part of the wristwatch-type information device 1.

The sounding section 125 uses a buzzer or electronic sound to
For example, the user is notified of the data communication status, the error occurrence status, and the like. The vibration notification unit 124 notifies the user of various states of the wristwatch-type information device 1 by vibration. Display 11
Reference numeral 1 is composed of a liquid crystal display, an organic EL element, or the like. The display unit 111 displays information regarding various states such as transmission / reception data of the wristwatch type information device 1 and time information. The external operation input unit 110 is composed of buttons, a touch panel, or the like. When the user operates the external operation input unit 110, various control signals associated with the operation are input to the central control circuit 114.

The non-volatile memory 122 is, for example, an EEP.
ROM (Electrically Erasable, Programmable Read-O
nly Memory), Flash memory, or FeRAM
(Ferroelectric Random Access Memory) etc. The nonvolatile memory 122 is used as the wrist watch type information device 1.
Various kinds of data such as various control programs for operating the watch and a unique ID number for uniquely identifying the wristwatch-type information device 1 are stored.

The antenna switching circuit 120 switches between transmission and reception of radio waves via the chip antenna 17.
The antenna switching circuit 120 connects the chip antenna 17 to the receiving circuit 150 when the wristwatch-type information device 1 receives a radio wave. Further, when the wristwatch-type information device 1 transmits radio waves, the antenna switching circuit 120
Connects the chip antenna 17 to the transmission circuit 151.

The receiving circuit 150 and the transmitting circuit 151 are
This is a circuit formed inside the wireless communication IC 15. When receiving a signal from the chip antenna 17, the receiving circuit 150 creates reception data D _RX based on the signal and outputs it to the central control circuit 114. When the transmission data D _TX is input from the central control circuit 114, the transmission circuit 151 modulates a carrier of a predetermined frequency by the transmission data D _TX and transmits it via the chip antenna 17.

FIG. 3 is a perspective view showing the external structure of the flexible substrate 16 and the chip antenna 17. The flexible substrate 16 is made of, for example, a heat-resistant polymer compound such as polyimide and is bendable. The chip antenna 17 has a dielectric layer laminated inside and is configured as an inverted F antenna. Then, the chip antenna 17 is fed with power via the substrate pattern 160A extended from the feeding terminal 160 of the flexible substrate 16. Further, the chip antenna 17 is grounded via the board pattern 161A extended from the ground terminal 161 of the flexible board 16.

Here, the reason why the chip antenna 17 is arranged on the flexible substrate 16 will be described. Assuming that the chip antenna 17 is provided directly on the circuit board 13, it may be necessary to configure the shape of the casing 12 according to the shape of the circuit board 13. That is, the shape of the casing 12 is restricted by the shape of the circuit board 13. Therefore, in the wristwatch type information device 1 of the present embodiment, the chip antenna 17 is arranged on the flexible substrate 16. Thereby, the flexible substrate 16 can be curved according to the shape of the casing 12, and the degree of freedom in designing the casing 12 can be improved.

Further, as described above, the flexible substrate 1
6 is fixed to the circuit frame 131. FIG. 4 is a plan view of the wristwatch-type information device 1 with the casing 12 and the back cover 10 removed, as seen from the back side. As shown in FIG. 4, the flexible board 16 is attached to the circuit frame 131 with screws 101. And the circuit frame 1
Between the 31 and the flexible substrate 16, for example, a conductive plate 1 made of an elastic conductor material such as brass.
8 is sandwiched. The conductive plate 18 is provided on the back cover 10
Is projected in the direction of.

A conductive plate 130 made of an elastic conductive material such as brass is sandwiched between the circuit frame 131 and the flexible substrate 16.
The conducting plate 130 is electrically connected to the feeding pattern of the chip antenna 17 on the one hand, and is electrically connected to the wireless communication IC on the other hand via the circuit board 13. Further, a battery holding plate 191 made of a conductive material and fixing the battery 19 is attached to the circuit frame 131. The MPU 14 and the wireless communication IC 15 are grounded to the battery holding plate 191. The battery holding plate 191 is provided with a conduction plate 192. The conduction plate 192 is provided so as to protrude toward the case back 10.

In the example shown in FIG. 4, the chip antenna 17 and the wireless communication IC 15 are grounded by bringing the conducting plate 18 and the conducting plate 130 into contact with the back cover 10. However, the chip antenna 17 may be grounded via the circuit board 13 and the conductive plate 130 by bringing the conductive plate 18 into contact with the ground pattern formed on the circuit board 13.

FIG. 5 is an exploded perspective view showing a process of attaching the back cover 10 to the casing 12. As shown in FIG. 5, the case back 10 is attached to the casing 12 by a plurality of screws 100. Then, as shown in FIGS. 1 and 4, when the back cover 10 is attached to the casing 12, the back cover 1
0 and the conducting plate 18 and the conducting plate 192 come into contact with each other, so that the ground terminal 161 of the chip antenna 17 and the case back 10 are electrically connected. That is, the back cover 10 serves as the ground surface of the chip antenna 17. Since the area of the back cover 10 is larger than the area of the ground pattern formed on the circuit board 13, the area where the chip antenna 17 is grounded is increased. As a result, the transmission / reception characteristics of the chip antenna 17 are improved.

In addition, when the wristwatch type information device 1 is worn by the user, the case back 10 comes into contact with the user's wrist. Since the human body is a conductor, the user himself / herself can be the ground of the chip antenna 17 through the back cover 10. As a result, the area for grounding the chip antenna 17 is further expanded, the antenna gain of the chip antenna 17 is improved, and the communication characteristics can be improved.

Further, as shown in FIG. 1, in the wristwatch type information device 1 of this embodiment, the circuit formed inside the wireless communication IC 15 and the chip antenna 17 electrically influence each other to transmit and receive wireless signals. When viewed in plan from the cover glass 11 direction so as not to adversely affect the operation of
The wireless communication IC 15 and the chip antenna 17 are arranged so as not to overlap each other. The arrangement principle will be described below.

FIG. 6 is a perspective view showing the positional relationship between the wireless communication IC 15 and the chip antenna 17. First, the projection surface 6 which is a plane substantially parallel to the circuit board 13
0 is assumed, and the case where the wireless communication IC 15 and the chip antenna 17 are projected on the projection surface 60 is assumed.

If the IC 15 for wireless communication is projected on the projection surface 60,
When the orthographic projection 15A of 7 and the orthographic projection 17A of the chip antenna 17 overlap each other, the arrangement position of the wireless communication IC 15 and the arrangement position of the chip antenna 17 overlap each other. This is the receiving circuit 150 or the transmitting circuit 151 and the chip antenna 1 formed inside the wireless communication IC 15.
7 and 7 may electrically interfere with each other.

On the other hand, on the projection plane 60, the wireless communication IC 15
If the orthographic projection 15A of 7 and the orthographic projection 17A of the chip antenna 17 do not overlap, the arrangement position of the wireless communication IC 15 and the arrangement position of the chip antenna 17 do not overlap. In this case, it is unlikely that the receiving circuit 150 or the transmitting circuit 151 formed inside the wireless communication IC and the chip antenna 17 electrically interfere with each other.

Further, depending on the method of constructing the antenna element or the method of forming the wireless communication circuit in the wireless communication IC 15, the orthogonal projection 15 of the wireless communication IC is slightly generated.
Even if A and the orthographic projection 17A of the chip antenna 17 are overlapped with each other, they may not adversely affect each other electrically.
In any case, it can be said that unless the overlap of the orthographic projection 15A and the orthographic projection 17A is reduced to approximately ½ or less, there is a high possibility that an electrical adverse effect will occur.

In the wristwatch-type information device 1 of this embodiment, since the wireless communication IC 15 and the chip antenna 17 are arranged so as not to overlap each other in a plane, the possibility of electrical interference between internal devices is reduced. Therefore, the transmission / reception performance of the chip antenna 17 can be stabilized.

<2. Second Preferred Embodiment> Next, a wristwatch type information device 2 according to a second preferred embodiment will be described. In the following description, the same components as those in the first embodiment are designated by the same reference numerals,
The description is omitted. FIG. 7 is an exploded perspective view showing an external configuration of the wristwatch-type information device 2. A casing 21 of the wristwatch-type information device 2 accommodates a chip antenna 17 used when the wristwatch-type information device 2 performs wireless communication. The specific position where the chip antenna 17 is stored is
This is the inside of the position indicated by the shaded portion b in FIG. 7. The back cover 20 is made of, for example, a conductive material such as stainless steel, titanium, or brass.
It is attached to a casing 21 made of a non-conductive material. A watch band 22 is arranged so as to be sandwiched between the back cover 20 and the casing 21.

The watch band 22 is made of a conductive material such as stainless steel, titanium or brass, and has a pair of holes 220. This hole 2
A fixed pin 221 made of a conductive material is provided on the reference numeral 20.
Can be inserted. The fixing pin 22 is attached to the back cover 20.
1 is provided with a hole 201, and the casing 21 side is also provided with a hole (not shown) into which the fixing pin 221 can be fitted. When the fixing pin 221 is inserted into the hole 220 of the watch band 22 and the fixing pin 221 is fitted into the hole 201 and the hole on the casing 21 side, and the back cover 20 is fixed with the screw 200, the watch band 2
2 can be attached. At this time, by sandwiching and crushing the resin fixing sheet 222, the connection between the casing 21, the watch band 22 and the back cover 20 can be brought into close contact.

The watch band 2 having the above structure
2 is attached, the watch band 22 is attached to the back cover 1
In addition to 0, it can be a ground plane of the wristwatch type information device 2. FIG. 8 is a cross-sectional view showing a state in which the watch band 22 is attached to the wristwatch type information device 2. As shown in FIG. 8, the back cover 20 and the watch band 22 include a fixing pin 22.
1 is in an electrically conductive state. The back cover 20 and the chip antenna 17 are in a conductive state, and the back cover 20 is used as a ground surface of the chip antenna 17. Therefore, the wristwatch-type information device 2 according to the present embodiment is provided with the back cover 20.
In addition, the watch band 22 also serves as the ground surface of the chip antenna 17. As a result, the antenna gain of the chip antenna 17 is improved. Then, the communication characteristics of the wristwatch type information device 2 can be further improved.

<3. Modifications> The wristwatch type information device of the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea of the present invention. The following are possible modes of this change.

(Modification 1) In the above-described first and second embodiments, the description has been given by taking the mode of performing the short-distance wireless communication conforming to the Bluetooth standard and the like. However, the wristwatch type information device of the present invention is not limited to the short-range wireless communication. For example, the present invention is also applicable to an antenna for receiving long-wave standard radio waves such as JJY or GPS (Global Positioning System) radio waves. Note that in order to receive the 1.5 GHz band radio wave used in GPS, it is preferable to use a patch antenna with one side of about 15 mm or a chip antenna with a long side of about 20 mm to 30 mm.

(Modification 2) In the first and second embodiments described above, the description has been given by using the chip antenna as the antenna, but the antenna provided in the wristwatch type information devices 1 and 2 is not A balanced feed type antenna may be used, and it does not necessarily have to be a chip antenna. FIG. 9 is a perspective view showing an external configuration of an antenna used in the second modification. The antenna shown in FIG. 9 is an inverted F type antenna made of a metal plate, and such an antenna may be provided in a wristwatch type information device. Furthermore, when forming the inverted F antenna, the flexible substrate 2
Alternatively, a spacer (not shown) made of a non-conductive material may be inserted between the antenna 16 and the antenna element 217 to hold the antenna element. By doing so,
It is possible to prevent the antenna element from deforming and the antenna characteristics from varying. Further, if the spacer is made of a dielectric material, the effective length of the antenna can be made longer, so that the antenna element can be downsized. Note that the inverted F-type antenna resonates at the quarter wavelength of the antenna element, and therefore, for example, Bl
A length of about 30 mm is suitable for receiving the 2.4 GHz band radio wave used in the uetooth standard.

(Modification 3) In the above-described first and second embodiments, the chip antenna 17 is arranged on the flexible substrate 16, but the antenna is provided in the wristwatch type information equipment. May be a so-called pattern antenna in which the antenna element is formed on the flexible substrate 16 by etching or the like.
FIG. 10 is a perspective view showing an example of an inverted F antenna configured as a pattern antenna on a flexible substrate.
When the pattern antenna 317 shown in FIG. 10 is used, the antenna itself can be made flexible, and the antenna can be bent and arranged in a shape that matches the casing shape inside the wristwatch type information device. Further, as the antenna element, a patch antenna including a patch-shaped conductor and a dielectric material may be configured on the flexible substrate 16. Since the patch antenna has a strong directivity above it, it is suitable for use as a GPS receiving antenna.

(Modification 4) In the above-described first and second embodiments, the wristwatch type information equipment has been described as an example, but the present invention is not limited to the application to the wristwatch type information equipment. . That is, any member may be used as long as it has a member made of a conductor material and the antenna is grounded to this member to expand the ground area. Further, a structure in which the antenna gain is improved by contacting a human body with a member whose antenna is grounded to make the human body a ground plane may be used.

[0037]

As described above, in the wristwatch type information device of the present invention, the wristwatch with the wireless communication function of the present invention is
This has the excellent effect of improving the antenna characteristics and improving the communication quality.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a wristwatch-type information device 1.

FIG. 2 is a block diagram showing an electrical configuration of the wristwatch-type information device 1.

FIG. 3 is a perspective view showing an external configuration of a flexible substrate 16 and a chip antenna 17.

FIG. 4 is a plan view of the wristwatch-type information device 1 with the back cover 10 removed from the casing 12, as viewed from the back side.

FIG. 5 is an exploded perspective view showing a process of attaching the back cover 10 to the casing 12.

FIG. 6 shows a wireless communication IC 15 and a chip antenna 1.
7 is a perspective view showing the relationship of the positions where 7 is arranged. FIG.

7 is an exploded perspective view showing an external configuration of the wristwatch-type information device 2. FIG.

FIG. 8 is a cross-sectional view showing a state in which a watch band 22 is attached to the wristwatch type information device 2.

FIG. 9 is a perspective view showing an external configuration of an antenna used in Modification 2.

FIG. 10 is a perspective view showing an example of an inverted F antenna configured as a pattern antenna on a flexible substrate.

FIG. 11 is a diagram showing changes in return loss depending on the size of the ground area.

[Explanation of symbols]

1, 2 ... Wristwatch type information equipment, 10 ... Back cover, 12 ... Casing, 13 ... Circuit board, 150 ... Receiving circuit, 151 ... Transmitting circuit, 15A ... Orthographic projection, 16 ... Flexible board, 1
7 ... Chip antenna, 17A ... Orthographic projection, 18 ... Conductive plate,
22 ... Clock band, 60 ... Projection surface.

Claims (12)

[Claims] 1. An antenna that is unbalancedly fed, a circuit board on which a wireless communication circuit that performs wireless communication through the antenna is arranged, and a case body that houses the antenna and the circuit board, the antenna Is disposed at a position different from that of the circuit board, and at least half of the orthogonal projection of the antenna overlaps with the orthogonal projection of the wireless communication circuit with a plane substantially parallel to the circuit board as a projection surface. An electronic device with a wireless function that can be worn on the wrist, which is characterized by not having it. 2. A grounding part which constitutes a part of the case body or is attached to the case body and is made of a conductive material, and further comprises an electrical connection between the antenna and the grounding part. The wrist-worn electronic device with a wireless function according to claim 1, further comprising a grounding mediating unit. 3. The wrist-worn electronic device with a wireless function according to claim 2, wherein the grounding portion is provided at a portion in contact with a human body. 4. The wrist-worn electronic device with a wireless function according to claim 3, wherein the grounding part is a back cover attached to the case body. 5. The wrist-worn electronic device with a wireless function according to claim 3, wherein the ground portion is a wrist band attached to the case body. 6. The wrist-worn wireless device according to claim 2, wherein the grounding mediating portion is made of a conductive material and is provided so as to project toward the grounding portion and contact the grounding portion. Electronic device with functions. 7. The wrist-worn electronic device with a wireless function according to claim 1, wherein the antenna is provided on a board different from the circuit board. A wrist-worn electronic device with a wireless function. 8. The arm-mounted type electronic device with a wireless function according to claim 7, wherein the substrate on which the antenna is arranged is a flexible substrate. . 9. The arm-mounted wireless device according to claim 1, wherein the antenna is an inverted F-type antenna. Electronic device with functions. 10. The arm-mounted electronic device with a wireless function according to claim 1, wherein the antenna is a patch antenna. Electronics. 11. The wrist-worn electronic device with a wireless function according to claim 1, wherein the case body is made of a non-shielding member that does not shield radio waves. A wrist-worn electronic device with wireless function. 12. The wrist-worn electronic device with wireless function according to claim 1, wherein the wrist-worn electronic device has a time display function. .