JP7119368B2 - data communication equipment - Google Patents

Description

The present invention relates to a wearable data communication device that is worn on a part of the human body.

A conventional data communication device will be described below. A conventional data communication device has a main body and a belt. The data communication device is attached to the wearer by a belt. The main body includes a case, a battery, a communication section, communication electrodes, and a ground electrode. In addition, the battery and the communication unit are housed in the case. On the other hand, one side of the communication electrode and the ground electrode is exposed from the case. Also, the communication section is electrically connected to the other of the communication electrode and the ground electrode inside the case.

The data communication device thus formed is worn, for example, on the arm. The data communication device communicates with the communication control device through the human body by touching the communication control device with a finger or palm. Therefore, both the communication electrode and the ground electrode come into contact with the human body. That is, both the communication electrode and the ground electrode are arranged on the human body contact side of the case.

For example, Patent Document 1 is known as prior art document information related to the invention of this application.

JP-A-2003-134009

However, in the conventional data communication device, both the communication electrode and the ground electrode are arranged on the side of the case that contacts the human body, so the distance between the communication electrode and the ground electrode is short. Therefore, the signal output from the transmission electrode and the signal to be received by the transmission electrode flow to the ground electrode, resulting in poor communication sensitivity between the data communication device and the communication control device.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve this problem and to provide a data communication device with good communication sensitivity between the data communication device and the communication control device.

To achieve this purpose, the data communication device has a main body, a belt, a power supply section, a communication section, communication electrodes, and a flat ground electrode. The body case has a bottom surface and side surfaces. The belt is connected to the case on the side surface of the main body case. The power supply is housed in the body case. The communication unit is driven by the power supply unit. The communication electrode is connected to the communication section, and provided on the bottom surface so as to be exposed from the main body case. The ground electrode is connected to the ground of the communication section inside the main body. At least part of the belt is made of an insulator. The ground electrode extends outside the body case from a position where it is connected to the ground of the communication section in the body case in a direction facing the first surface where the exposed surface of the communication electrode extends outside the body case. a metal plate having a second surface. Furthermore, the second surface is covered with an insulator. The root portion where the ground electrode is coupled on the side surface of the main body case is provided at a position having a step from the bottom surface of the main body case. This makes it possible to achieve the intended purpose.

As described above, when the data communication device of the present invention is worn on the human body, the insulator can prevent the ground electrode from coming into direct contact with the human body. Therefore, the signal output from the transmitting electrode and the signal to be received by the transmitting electrode are less likely to flow to the ground electrode. As a result, the sensitivity of communication between the data communication device and the communication control device is improved.

1 is a conceptual diagram of a data communication system according to an embodiment of the present invention; FIG. 1 is a block diagram of a data communication device according to an embodiment of the present invention; FIG. 1 is a conceptual diagram of a data communication device according to an embodiment of the present invention; FIG. 1 is an exploded perspective view of a data communication device according to an embodiment of the present invention; FIG. 1 is a front view of a data communication device according to an embodiment of the present invention; FIG. 1 is a right side view of a data communication device according to an embodiment of the present invention; FIG. 1 is a left side view of a data communication device according to an embodiment of the present invention; FIG. 1 is a top view of a data communication device according to an embodiment of the present invention; FIG. 1 is a bottom view of a data communication device according to an embodiment of the present invention; FIG. FIG. 2 is a rear view of the data communication device according to the embodiment of the present invention, viewed from the mounting surface; 1 is a perspective view of a data communication device according to an embodiment of the present invention; FIG. 1 is a perspective view of a data communication device when a belt is tightened according to an embodiment of the present invention; FIG. FIG. 11 is a perspective view of a modified example of the data communication device according to the embodiment of the present invention; FIG. 4 is an exploded perspective view of a modification of the data communication device according to the embodiment of the present invention;

Before describing the data communication device according to the present embodiment, a data communication system using the data communication device will be described. FIG. 1 is a conceptual diagram of a data communication system 1001. As shown in FIG. The data communication system 1001 has a data communication device 11 and a communication control device 1002 .

The communication control device 1002 has a communication electrode 1002a, a ground electrode 1002b, and a communication section 1002c. Communication electrode 1002a is connected to communication section 1002c. The ground electrode 1002b and the ground terminal (not shown) of the communication section 1002c are both connected to the ground 1003. FIG.

On the other hand, the data communication device 11 is worn by the wearer 1004 . Data communication device 11 is worn, for example, on arm 1004a. The data communication device 11 has a mounting surface 11a and an outer surface 11b. The outer surface 11b is formed on the opposite side of the mounting surface 11a. When the data communication device 11 is worn on the arm 1004a, the data communication device is worn so that the mounting surface 11a faces the arm 1004a. In this case, wearer 1004 touches communication electrode 1002a with hand 1004c. Thereby, the data communication device 11 and the communication control device 1002 communicate with each other. At that time, the data communication device 11 and the communication control device 1002 communicate via the body of the wearer 1004 . The wearer 1004 touches the communication electrode 1002a with the palm, back of the hand, or finger 1004b. Wearer 1004 is not limited to touching communication electrode 1002a with hand 1004c. For example, wearer 1004 may touch communication electrode 1002a with arm 1004a such as the elbow. In any case, the wearer 1004 touches the communication electrode 1002a at a site close to where the data communication device 11 is worn. Note that the wearer 1004 is not limited to being in direct contact with the communication electrode 1002a, and may have an intervening object between the finger 1004b and the communication electrode 1002a as long as communication is possible.

When wearer 1004 touches communication electrode 1002a with finger 1004b, data communication device 11 and communication control device 1002 communicate via arm 1004a, hand 1004c, and finger 1004b. That is, the human body between arm 1004 a and finger 1004 b constitutes a communication path between data communication device 11 and communication control device 1002 .

Since the data communication device 11 is worn by the wearer 1004 in this manner, the data communication device 11 generally operates in a non-grounded state because it cannot be directly grounded to the ground by a ground wire or the like. That is, the data communication device 11 is in a potential floating state. The configuration in which the data communication device 11 is attached to the arm 1004a is not limited, and a configuration in which the data communication device 11 is attached to the leg or the torso may be employed.

When the wearer 1004 tries to give an instruction to the communication control device 1002, the wearer 1004 generally touches the communication control device 1002 with a finger 1004b or a hand 1004c. Therefore, data communication device 11 is worn on arm 1004a near finger 1004b or hand 1004c. With this configuration, even when the communication control device 1002 is touched with the finger 1004b, the data communication device 11 is relatively close to the ground electrode 1002b. Therefore, the data communication device 11 can be grounded through the space between the data communication device 11 and the ground electrode 1002b.

(Embodiment 1)
Data communication device 11 according to the present embodiment will be described below with reference to the drawings. FIG. 2 is a circuit block diagram of the data communication device 11. As shown in FIG. The data communication device 11 has a power supply section 12 , a communication section 13 and a communication antenna 14 . The communication antenna 14 has a communication electrode 15 (hot electrode) and a planar ground electrode 16 (cold electrode). The communication section 13 is driven by the power supply section 12 . The communication electrode 15 is connected with the communication section 13 . The communication section 13 then transmits a communication signal to the communication electrode 15 . Alternatively, the communication unit 13 receives communication signals from the communication electrodes 15 . On the other hand, the ground electrode 16 is connected to the ground 17 of the communication section 13 .

Then, the data communication device 11 configured as described above is worn on the body of the wearer 1004 . The data communication device 11 has a mounting surface 11a and an outer surface 11b. The outer surface 11b is formed on the opposite side of the mounting surface 11a. Here, the data communication device 11 is worn with the mounting surface 11a facing the body of the wearer 1004 . Such a data communication device 11 is worn with the communication electrodes 15 facing the human body. In other words, the mounting surface 11a refers to the side of the data communication device 11 on which the communication electrodes 15 are provided. The communication signal transmitted from the communication electrode 15 attached to the wearer 1004 in this way is transmitted to the communication control device 1002 via the body of the wearer 1004 . On the other hand, the communication signal transmitted from the communication control device 1002 is received by the communication electrode 15 via the body of the wearer 1004 .

The data communication device 11 is preferably worn so that the communication electrodes 15 are in direct contact with the body of the wearer 1004 . With this configuration, loss of communication signals can be reduced, so that communication between the data communication device 11 and the communication control device 1002 is stabilized. Note that the surface 15a of the communication electrode 15 is not limited to the configuration in which it is in direct contact with the human body, and may have a small gap. Also, a thin piece of clothing or the like may be interposed between the human body and the communication electrode 15 . However, in this case, communication signals are attenuated due to an increase in stray capacitance between the communication electrodes 15 and the body of the wearer 1004 . Therefore, the thickness of the clothes and the distance between the gaps should be such that the electric field intensity at the communication electrode 1002a can be maintained at a level equal to or higher than a predetermined level.

FIG. 3 is a conceptual diagram of the data communication device 11. As shown in FIG. The data communication device 11 has a body case 21 and a belt 22 . Data communication device 11 is held on arm 1004a by fastening belt 22 . To that end, the belt 22 is wrapped around the arm 1004a and
The front end of the belt 22 is fastened by a fixing portion, which will be described later, and attached to and held by the arm 1004a.

The power supply unit 12 and the communication unit 13 are housed inside the body case 21 . The body case 21 has a bottom surface 21a and side surfaces 21b. The belt 22 is connected to the body case 21 on the side surface 21b of the body case 21 . At least part of the belt is made of an insulator 22a. The data communication device 11 is worn with the bottom surface 21a facing the arm 1004a. That is, the bottom surface 21a of the main body case 21 constitutes the mounting surface.

The communication electrode 15 is provided so as to be exposed from the main body case 21 on the bottom surface 21a. On the other hand, one of the ground electrodes 16 is connected to the ground 17 inside the body case 21 . The other ground electrode 16 extends from the inside of the body case 21 to the outside of the body case 21 . The ground electrode 16 is arranged so as to face the surface 15b extending from the surface 15a (or the bottom surface 21a) of the communication electrode 15 to the outside of the main body case 21 . Further, the portion extending to the outside of the body case 21 has a surface 16a facing the surface 15b, and the surface 16a is covered with an insulator 22a. With this configuration, the surface of the insulator 22a on the side of the surface 16a of the ground electrode 16 constitutes the mounting surface. That is, the surface 15b side of the belt 22 becomes the mounting surface 11a. When the body case 21 is attached to the arm 1004a with the belt 22, the insulator 22a of the belt 22 is interposed between (the surface 16a of) the ground electrode 16 and the arm 1004a.

With the above configuration, when the data communication device 11 is worn by the wearer 1004, the insulator 22a prevents the ground electrode 16 from coming into direct contact with the wearer 1004. FIG. Therefore, the signal output from the transmitting electrode and the signal to be received by the transmitting electrode are less likely to flow to the ground electrode. As a result, the sensitivity of communication between the data communication device 11 and the communication control device 1002 is improved.

The data communication device 11 will be described in more detail below. The power supply unit 12 is preferably a secondary battery. This configuration eliminates the need for battery replacement, which is advantageous in terms of waterproofness. Note that the power supply unit 12 is not limited to a secondary battery, and may be a primary battery.

The communication unit 13 may include a transmitter 13a, a receiver 13b, a control circuit 13c, a memory 13d, a switch 13e, and the like. The communication electrode 15 is connected to the input/output terminal of the switch 13e. The input terminal of switch 13e is connected to the output of transmitter 13a. On the other hand, the output terminal of switch 13e is connected to the input of receiver 13b. The switch 13e electrically connects the communication electrode 15 and the receiver 13b during reception, and electrically connects the communication electrode 15 and the transmitter 13a during transmission. The memory 13d stores, for example, the ID data of the wearer or the data communication device. Then, the control circuit 13c acquires these data from the memory 13d and transmits them to the transmitter 13a. On the other hand, receiver 13b receives, for example, a response signal from communication control unit 1002. FIG. The response signal indicates, for example, that the communication sent from the data communication device 11 was successfully received by the communication control device 1002 .

FIG. 4 is an exploded perspective view of the data communication device 11. As shown in FIG. FIG. 5 is a front view of the data communication device 11 viewed from the outer surface 11b side. 6 is a right side view of the data communication device 11. FIG. 7 is a left side view of the data communication device 11. FIG. FIG. 8 is a top view of the data communication device 11. As shown in FIG. 9 is a bottom view of the data communication device 11. FIG. FIG. 10 is a rear view of the data communication device 11 viewed from the mounting surface 11a.

The data communication device 11 may further have an external input/output 18 and a display section 19 . The external input/output 18 and the display unit 19 are housed inside the body case 21 . The display unit 19 is lit by a control signal from the control circuit 13c. The display unit 19 lights up, for example, when a communication signal is normally transmitted from the transmitter 13a. Alternatively, it lights up when a response signal is received from the receiver 13b. With this configuration, the wearer can recognize that communication has been completed normally between the data communication device 11 and the communication control device 1002 . The data communication device 11 can also take in external data and transmit it to the communication control device 1002 . The data communication device 11 may further have an external input/output 18 and a display section 19 . In this case, power can be charged from an external device to the power supply unit 12 via a USB cable or the like.

Since the belt 22 is wrapped around the arm 1004a, the belt 22 is made of flexible material. Furthermore, the ground electrode 16 is also configured to have flexibility. For this reason, the ground electrode 16 is made of, for example, a thin metal plate. Alternatively, the ground electrode 16 is composed of a copper foil of a flexible substrate.

It is preferable that the ground electrode 16 is also covered with an insulator 22a on the surface 16b opposite to the surface 16a. With this configuration, the ground electrode 16 is housed inside the belt 22 . Therefore, it is possible to prevent the metal body from suddenly contacting the belt 22 . Therefore, even in such a case, communication between the data communication device 11 and the communication control device 1002 is stable.

It is preferable that the ground electrode 16 is provided so as to extend to the vicinity of the leading end of the 22 belt. With this configuration, when the belt 22 is wrapped around the arm 1004a, the ground electrode 16 goes around the arm. With this configuration, changes in the distance and direction between the ground electrode 16 and the ground electrode 1002b of the communication control device 1002 can be reduced regardless of the posture such as the direction and position of the arm 1004a. Therefore, the communication between the data communication device 11 and the communication control device 1002 is stable regardless of the posture such as the direction and position of the arm 1004a.

Further, the body case 21 has a mounting side case 211 and an outer case 212 . The communication electrode 15 is arranged in the center of the mounting side case 211 so as to be exposed from the bottom surface 21a. The outer case 212 is arranged outside the mounting side case 211 . The mounting side case 211 and the outer case 212 are combined and hermetically sealed. A communication unit and other electric circuits are accommodated in a space formed inside the body case 21 .

The belt 22 is sandwiched between the mounting side case 211 and the outer case 212 and connected to the main body case 21 . The mounting side case 211 preferably has a resin-made frame portion 21 c outside the outer edge of the communication electrode 15 . With this configuration, the distance between the communication electrode 15 and the ground electrode 16 can be increased. Therefore, it is possible to suppress the attenuation of the communication signal due to the communication signal flowing to the ground electrode.

Further, it is preferable that the surface 16a of the ground electrode 16 be arranged apart from the surface 15b toward the front surface 21d. The front surface 21 d is opposite to the bottom surface 21 a of the body case 21 . For this reason, for example, the root of the belt 22 is connected to the side surface 21b of the main body case 21 at a position having a step from the bottom surface 21a side end. With this configuration, when the belt 22 is wrapped around the arm 1004a, the belt 22 comes into contact with the arm at a position slightly away from the outer edge of the bottom surface 21a of the body case 21. As shown in FIG. Therefore, when the belt 22 is wrapped around the arm 1004a, it is possible to prevent the distance between the ground electrode 16 and the communication electrode 15 from becoming small in the vicinity of the base of the belt.

Furthermore, it is preferable that the communication electrodes 15 are arranged side by side on substantially the same plane as the bottom surface 21a. With this configuration, when the data communication device 11 is worn on the arm, the communication electrode 15 and the arm 1 are separated from each other.
004a can be shortened. Therefore, since the communication electrode 15 is easily brought into contact with the arm 1004a, the loss when transmitting the communication signal to the arm 1004a can be reduced. Note that the communication electrodes 15 are not limited to being arranged on substantially the same plane as the bottom surface 21a, and may be arranged so as to protrude from the bottom surface 21a. Further, the communication electrode 15 is not limited to being exposed from the mounting surface 11 a of the main body case 21 , and may be arranged on the mounting surface 11 a side of the belt 22 .

Next, a configuration for mounting the data communication device 11 on the arm 1004a will be described.
FIG. 11 is a perspective view of the data communication device 11. As shown in FIG. FIG. 12 is a perspective view of the data communication device 11 when the belt 22 is tightened.

The data communication device further has a buckle portion 23 . The buckle portion 23 is worn by winding the mounting surface 11a around the arm in the direction toward the arm 1004a. The length of the belt 22 is adjusted by the buckle part 23 so that the belt 22 can be kept wrapped around the arm. The data communication device 11 is preferably worn so that the surface 15a of the communication electrode 15 is in direct contact with the human body. However, the thickness of the arm 1004a varies from person to person. Therefore, it is desirable that the length of the belt 22 can be freely adjusted. Therefore, it is desirable that the buckle portion 23 is of a buckle type. The buckle type buckle portion 23 does not have a pin for fixing the belt 22 . That is, the belt 22 is not formed with pin holes through which pins are passed to fix the belt 22 . With this configuration, the length of the belt 22 can be freely adjusted, so the gap between the communication electrode 15 and the arm 1004a can be reduced regardless of the thickness of the arm 1004a. Therefore, communication signal loss can be reduced.

If pinholes are formed in the belt 22, the ground electrode 16 must be formed excluding the positions of the pinholes. That is, a missing portion of the ground electrode 16 is generated at the position of the pin hole. However, since the buckle-type belt 22 does not need to provide pin holes, it is not necessary to provide the missing part of the ground electrode 16 due to the pin holes. Therefore, the size of the ground electrode 16 can be made constant regardless of the orientation of the arm 1004a. In this case, when the ground electrode 16 is viewed from the outside, it is preferable that the width of the ground electrode 16 in the direction orthogonal to the direction from the root to the tip be the same from the root to the tip.

The buckle type buckle portion 23 has, for example, a buckle body 231 , a gap 232 and a fixing portion 233 . The fixing part 233 is coupled with the buckle body 231 . A gap 232 is formed between the buckle main body 231 and the fixing portion 233 . When attaching the data communication device 11 to the arm 1004a, the tip of the belt 22 is inserted through the gap 232. As shown in FIG. In this state, the fixed portion 233 is pressed against the belt 22 . With this configuration, the belt 22 is sandwiched and held between the fixing portion 233 and the buckle body 231 .

The buckle portion 23 is arranged on the outer surface 11 b side of the body case 21 . Note that the body case 21 may also serve as part of the buckle portion 23 . That is, the buckle portion 23 includes an outer case 212 forming a buckle main body 231 and a mounting side case 211 having a bottom surface 21a as a mounting surface 11a. In this case, the bottom surface 21 a of the mounting side case 211 constitutes the mounting surface 11 a of the buckle portion 23 . In addition, the front surface 21d of the outer case 212 also serves as the buckle main body 231. As shown in FIG. With this configuration, the thickness of the buckle portion 23 can be reduced. In addition, the buckle portion 23 and the main body case 21 can be gathered at one place on the belt 22 . Therefore, the feeling of wearing the data communication device 11 on the arm 1004a is good.

Note that the main body case 21 is not limited to the structure that also serves as the buckle main body 231 , and the front surface 21 d of the main body case 21 may be formed separately from the buckle main body 231 . That is, the buckle portion 23 includes a buckle main body 231 , an outer case 212 and a mounting side case 211 . In this case, the buckle main body 231 is fixed to the main body case 21 while overlapping the outer surface 11b side of the front surface 21d of the main body case 21 . With this configuration, the buckle portion 23 can be easily replaced. Therefore, the wearer 1004 can replace the buckle portion 23 with a buckle portion 23 having a design of his/her preference. Also in this case, the buckle portion 23 and the main body case 21 can be gathered at one place on the belt 22 .

Further, the main body case 21 is not limited to being arranged on the mounting surface 11 a side of the buckle portion 23 , and the main body case 21 may be arranged at a position different from that of the buckle portion 23 . In this case, the body case 21 is arranged at a position not overlapping the buckle portion 23 . In other words, the main body case 21 is arranged so as to be coupled with the belt 22 between the buckle portion 23 and the tip of the belt 22 . Furthermore, the belt 22 is coupled with the buckle portion 23 . In this case, belt 22 is coupled with buckle body 231 . In this case, the communication electrode 15 is not limited to being disposed on the body case 21, and may be disposed on the mounting surface 11a side of the belt 22 or the buckle body 231. FIG. With these configurations, the thickness of the buckle portion 23 can be reduced. When the data communication device 11 is worn on the arm 1004a, the body case 21 should be placed on the arm 1004a opposite to the buckle portion 23 while the data communication device 11 is worn on the arm 1004a. With these configurations, it is possible to reduce the sense of discomfort when wearing on the arm 1004a.

Next, the fixing portion 233 will be described in detail. The fixing portion 233 preferably has a fixing portion 233a and a fixing portion 233b. The fixing portion 233a and the fixing portion 233b are arranged side by side in the direction in which the belt 22 penetrates. Then, the belt 22 is inserted into the space 232a between the fixing portion 233a and the buckle main body 231 in the direction from the mounting surface 11a toward the outer surface 11b. Further, the buckle portion 23 is inserted into the space 232b between the fixing portion 233b and the buckle main body 231 in the direction from the outer surface 11b toward the mounting surface 11a. With this configuration, the belt 22 is sandwiched between the fixing portion 233 a and the buckle main body 231 and between the fixing portion 233 b and the buckle main body 231 . Therefore, loosening of the belt 22 is less likely to occur.

The tip of the ground electrode 16 is provided on the side opposite to the coupling side of the belt 22 with the body case 21 . That is, the tip of the ground electrode 16 preferably extends to the tip of the belt 22 . With this configuration, the ground electrode 16 is mounted around the arm 1004a. Therefore, it is possible to perform very stable communication regardless of the directionality of the arm 1004a.

The configuration in which the tip of the ground electrode 16 extends to the tip of the belt 22 is not limited to the configuration in which the tip of the ground electrode 16 extends to at least a position overlapping the buckle portion 23 when the belt 22 is inserted into the gap 232 . It may be a configuration that In this case, the outer case 212 or the buckle body 231 is preferably made of metal and electrically connected to the ground electrode 16 . With this configuration, the outer case 212 and the buckle body 231 also act as a ground electrode. With this configuration, the ground electrode 16 can be formed around the arm 1004a. Further, in this case, the belt 22 passes through the outer case 212 and the outer surface side of the buckle main body 231 . A surface layer of the belt 22 is covered with an insulator 22a. Therefore, the possibility that the wearer 1004 touches the outer case 212 or the buckle main body 231 can be reduced. In addition, the possibility of the metal body coming into contact with the outer case 212 or the buckle main body 231 can be reduced. As a result, stable communication can be obtained.

Preferably, the tip of the ground electrode extends to a position overlapping the base of the ground electrode. With this configuration, the ground electrode 16 can be formed around the arm 1004a. Especially in this case, even if the outer case 212 and the buckle main body 231 are made of resin, the ground electrode 16 can be formed so as to encircle the arm 1004a. Further, if the outer case 212 and the buckle main body 231 are made of resin, stable communication can be achieved even if a metal object contacts the outer case 212, the buckle main body 231, and the like.
(Modification)
FIG. 13 is a perspective view of the data communication device 51. As shown in FIG. 14 is an exploded perspective view of the data communication device 51. FIG. Note that the data communication device 51 is a modification of the data communication device 11 . The data communication device 51 has a belt 52 instead of the belt 22 of the data communication device 11 . The belt 52 is different from the belt 22 in that it is connected to two opposite sides of the body case 21 . The ground electrode 16 is housed in both belts 52 on both sides of the body case 21 . That is, the ground electrodes 16 extend from the inside of the body case 21 to the outside of the body case in opposite directions. Therefore, the body case 21 is arranged in the central portion of the belt 52 .

Also, the data communication device 51 has a buckle portion 53 instead of the buckle portion 23 of the data communication device 11 . The buckle portion 53 is a pin-type buckle. In this case, the buckle portion 53 includes a ring portion 531 , a gap 532 and a pin hole 533 . The ring portion 531 is formed at one end of the belt 52 . Also, the ring portion 531 has a gap 532 through which the belt passes. A pin hole 533 is formed between the ring portion 531 and the body case 21 . On the other hand, the other end of the belt 52 has a pin 534 . Here, a plurality of pin holes 533 are formed in the belt 52 . Therefore, the length of the belt 52 can be adjusted by inserting the pin 534 into one of the plurality of pin holes 533 . That is, the wearer 1004 wears the data communication device 51 on the arm 1004a by inserting the pin 534 into the pin hole 533 suitable for the thickness of the wearer's arm 1004a.

The ground electrode 54 is housed inside the belt 52 . At this time, the ground electrode 54 has slits 541 in the region where the plurality of pin holes 533 are formed.

As described above, the above embodiment has been described as an example of the technique of the present disclosure. However, the technology in the present disclosure is not limited to the above, and can be applied to embodiments in which modifications, replacements, additions, omissions, etc. are made as appropriate. Moreover, it is also possible to combine each component described in the embodiment to form a new embodiment.

INDUSTRIAL APPLICABILITY The data communication device according to the present invention has the effect of being able to perform stable communication, and is useful when used in equipment using human body communication that communicates while worn on the human body.

REFERENCE SIGNS LIST 11 data communication device 11a mounting surface 11b outer surface 12 power supply unit 13 communication unit 13a transmitter 13b receiver 13c control circuit 13d memory 14 communication antenna 15 communication electrode 15a surface 15b surface 16 ground electrode 16a surface 16b surface 17 ground 18 external input/output 19 Display Part 21 Body Case 21a Bottom 21b Side 21c Frame 21d Front 22 Belt 22a Insulator 23 Buckle Part 51 Data Communication Device 52 Belt 53 Buckle Part 54 Ground Electrode 211 Mounting Side Case 212 Outer Case 231 Buckle Body 232 Gap 232a Gap 232b Gap 233, 233a, 233b Fixing part 531 Ring part 532 Gap 533 Pin hole 534 Pin 541 Slit 1001 Data communication system 1002 Communication control device 1002a Communication electrode 1002b Ground electrode 1002c Communication part 1003 Earth 1004 Wearer 1004a Arm 1004b Hand 1004

Claims (6)

a body case having a bottom surface and side surfaces;
a belt coupled to the case on the side surface of the main body case;
a power supply unit housed in the main body case;
a communication unit driven by the power supply;
a communication electrode connected to the communication unit and provided to be exposed from the main body case on the bottom surface;
a flat plate-shaped ground electrode connected to the ground of the communication unit in the main body case;
with
At least part of the belt is made of an insulator,
The ground electrode extends outside the body case from a position where the ground electrode is connected to the ground of the communication section in the body case in a direction facing the exposed surface of the communication electrode to the outside of the body case. a metal plate extending to and having a second surface covered with the insulator;
A root portion to which the ground electrode is coupled on the side surface side is provided at a position having a step from the bottom surface of the main body case,
Data communication equipment. The ground electrode has a third surface opposite to the second surface, and is housed in the belt such that the third surface is covered with the insulator,
2. The data communication device according to claim 1. The ground electrode is provided extending to the vicinity of the tip of the belt,
3. The data communication device according to claim 2. The body case has a resin frame outside the outer edge of the communication electrode,
2. The data communication device according to claim 1. The body case has a front surface opposite to the bottom surface,
The second surface is arranged away from the first surface toward the front surface,
2. The data communication device according to claim 1. The communication electrodes are arranged side by side on substantially the same plane as the bottom surface, or are arranged so as to protrude from the bottom surface.
2. The data communication device according to claim 1.

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