JP2917521B2 - Radio antenna device - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to an antenna device for a wireless device having an antenna element integrally formed on a band that can be worn on an arm or the like, and in particular, a band size by a wearer. The present invention relates to an antenna device for a wireless device that can obtain a stable antenna gain without being affected by the difference between the above and the durability of the band fastener.

[Conventional technology]

Among wireless devices such as portable transmitters and portable receivers, as an antenna device of a wrist-mounted wireless device that can be carried while being worn on an arm, Japanese Patent Application Laid-Open No. 58-94204 and Japanese Utility Model Application 26307
Japanese Unexamined Patent Publication (KOKAI) No. 2000-205,086 is known.

Japanese Patent Application Laid-Open No. 58-94204 discloses a multi-turn micro-loop consisting of a flexible band-shaped laminated core arranged in the length direction of a watch band, and a tuning coil wound tightly around the laminated core. An antenna (bar antenna). Since the area enclosed by the loop is only equivalent to the cross-sectional area of the band, and because it orbits around the wrist, the loop through which the magnetic field penetrates is only a part even with multiple turns, so the antenna gain is weak. is there.

Japanese Utility Model Application Laid-Open No. 61-26307 is a monopole linear antenna having an antenna element piece that can be erected at one end of a concave groove of a wristwatch band. At the time of transmission / reception, it is necessary to set the antenna element piece out of the groove of the wristwatch band and raise it, and since the monopole linear antenna has strong directivity, it is not practical for an arm-mounted radio. .

In order to solve such problems, for example,
The structure shown in FIG. 24 has been devised. In this figure, an arm-mounted radio device 90 includes a case body 92 (radio device main body) in which a radio circuit board and the like are stored, an insulating first band body 91a connected to both sides thereof, and a And a wrist band 91 having a second band member 91b. Both of the first and second band members 91a and 91b have band-shaped first and second conductor plates therein. 93a and 93b are fixed. Here, both the first conductive plate 93a and the second conductive plate 93b are conductively connected to a radio circuit provided inside the case body 92 on the side of the case body 92. At the end side, it is also conductively connected to metallic middle fasteners 91c and 91d (band fasteners) of the first and second band bodies 91a and 91b. For this reason, as shown in FIG. 24, when the first and second band bodies 91a and 91b are connected via the middle fasteners 91c and 91d, the first and second band bodies 91a and 91b are connected as shown in FIG. The second conductor plates 93a and 93b are:
Radio circuit 94 and middle fastener 91 inside case body 92
A loop is formed via c and 91d to form an antenna element 95 as a single-turn loop antenna. Here, the first conductor plate is included in the radio circuit 94 of the receiver specification.
A high-frequency amplifier circuit 94b is conductively connected to the side of 93a via a coupling capacitor 94a, and a variable capacitor 94c is loaded between the high-frequency amplifier circuit 94b and the ground potential. The side of the second conductor plate 93b is fixed at the ground potential.

[Problems to be Solved by the Invention] However, in the conventional antenna element 95 for a wrist-worn type radio device, the band size is different because the wrist circumference is different depending on the wearer, and the perimeter of the loop (antenna loop length) As a result, the inductance value of the antenna changes, and the antenna gain decreases. That is, since the tuning frequency of the antenna body 95 is represented by the following equation, when the band size is changed by the wearer and the inductance value (L) of the antenna element 95 changes, the tuning frequency also shifts, This is because the antenna gain decreases.

f = 1 / [2π · (LC) ^1/2 ] f: Tuning frequency L: Antenna inductance C: Capacitance Also, when the attachment / detachment of the arm mounting band 91 to the arm is repeated,
The shape and surface condition of the middle fasteners 91c and 91d change. For this reason, there is also a problem that the contact resistance value and the like of the connection portion of the middle fasteners 91c and 91d increase with time, the loss resistance of the antenna element 95 increases, and the antenna gain decreases.

Since the antenna element 95 is a one-turn loop antenna,
Since the antenna has a directional characteristic of approximately figure 8, the antenna gain greatly changes depending on the position of the arm.

In view of the above problems, it is an object of the present invention to provide an antenna element provided integrally with a band, by modifying and improving a basic antenna, thereby changing the band size depending on the wearer and the durability of the band fastener. It is an object of the present invention to provide an antenna device for a radio device which can obtain a stable antenna gain with little change even if the posture of the band is various without being affected by the characteristics.

[Means for solving the problem]

In order to achieve the above object, in a wireless device antenna apparatus according to the present invention, a band (slot or slit) in which a groove (slot or slit) is formed in a length direction of a plate surface with respect to a band that can be worn on an arm or the like. An antenna element having a conductor plate is provided. That is, the antenna device for a radio device according to the present invention is a one-turn loop antenna (basic antenna) that is connected in a ring (closed loop) shape such that a band-shaped conductor plate fixed to a band orbits in the length direction of the band. Rather than having a substantially circular loop antenna, it can also function as a slot antenna (circumferential slot antenna on a finite ground) by the band conductor plate itself having grooves (slots or slits) formed along its length. An antenna element is provided. The slot antenna has a groove formed in an infinite plane conductor land in principle, and has a feeding point at a portion straddling the groove. In the case where the conductor ground is a cylindrical surface, a slot aligned in the axial direction (general line direction) is an axial slot antenna, and a slot aligned in the circumferential direction is a circumferential slot antenna. However, in the antenna element of the present invention, the strip-shaped conductor plate has a band-shaped finite ground, and the strip-shaped conductive plate itself is arranged in the circumferential direction around the wrist and the like. It can be said that it corresponds to a circumferential slot antenna. If the conductor zone separated by the groove is considered to be narrow and linear, the folded two-wire monopole antenna is bent to the right in a substantially semicircular shape together with the two wires. A bi-modal monopole antenna in which an antenna and a folded two-wire monopole antenna are bent to the left in a substantially semicircular shape together with two wires and a left semicircular folded monopole antenna is symmetrically connected at the feeding point. it can. Therefore, the antenna element according to the present invention has an intermediate function between the combination of the bimorph monopole antenna and the circumferential slot antenna.

For example, the basic structure is shown in FIG.
An arm mounting band 12 is connected to the case body 11, and a conductor plate 13 made of a belt-shaped stainless steel plate having a groove 13a formed in the length direction is fixed to the arm mounting band 12. For this reason, the conductor plate 13 itself constitutes an antenna element 14 that functions as a circumferential slot antenna on a finite ground.

For this reason, the antenna element 14 can be worn on the arm via the arm wearing band 12, and the circumference of the groove 13a has its own size and shape regardless of the wearer's band size. It is in the prescribed state. Therefore, the inductance value of the antenna element 14 does not change and the high antenna gain is maintained between the state of being worn on the arm and the state of not being worn on the arm and even when the thickness of the arm of the wearer is different. Can be.

Further, when the antenna element 14 is worn on the arm, the groove 13a formed in the conductive plate 13 which is sufficiently large for the wavelength is opened toward the outer periphery of the band body 12 for the arm, so that the antenna element 14 The omnidirectionality of is improved. Especially when wearing the wrist,
The antenna opening area is equivalent to the wrist cross-sectional area, and is approximately L ² / π
Therefore, it can be increased in proportion to the square of L, and a significant improvement in antenna gain can be realized. Since the antenna element can be constituted by only one band-shaped conductor plate, the band itself can be made thinner and lower in cost, and the durability as an antenna can be maintained even when the antenna is repeatedly bent at the time of attachment and detachment.

In addition, as shown in FIG. 4, when a structure in which the electric field E can be generated in the groove 13a by providing the power supply circuit 15 for the conductor plate 13 can radiate an electromagnetic wave from the groove 13a. Will be possible. Further, the antenna element 14 is highly sensitive to a magnetic field component directed in the surface direction of the wrist band 12. Here, in a wireless device that is worn on the human body, the electric field component is weakened by the human body, whereas the magnetic field component is enhanced in the opposite way. Therefore, as a wireless device antenna device, a magnetic field detection type antenna is better. It is effective. That is,
High sensitivity when worn on the human body, which is a necessary condition for an arm-mounted type (human body wearing effect). In addition, for the band, if necessary, so that it can be worn on the arm etc.,
Provide band fasteners of any configuration.

Here, when the band is composed of a first band member and a second band member connected to both sides of the case member, the band member on at least one of the first and second band members. , An antenna element including a strip-shaped conductor plate having a groove formed in the length direction is provided. When the band is composed of the first band body and the second band body connected to both sides of the case body, a groove is formed in the length direction from the edge of the case body side for each of these band bodies. The formed first conductor plate and second conductor plate may be fixed, and one antenna element may be configured by these conductor plates. In this case, on the case body side, the ends of the one-side conductor zone and the other-side conductor zone on the first conductor plate side divided by the groove, and the one-side conductor zone and the other end on the second conductor plate side The antenna element is configured such that the end of the side conductor zone is electrically connected to the end of the one side conductor zone and the end of the other side conductor zone via electric paths formed on the case body side. I do. In the wireless device antenna device having such a configuration, for example, when the electric path includes a circuit pattern of a wireless device circuit board disposed inside the case body, the circuit pattern is formed along the inner periphery of the case body. May be included. Here, the conductor plate side and the circuit pattern side or the wiring portion side may be directly electrically connected, but these are electrically connected via conductive terminals provided on the case body side or the conductor plate side. May be.

In the present invention, for the purpose of adjusting the tuning frequency to a predetermined value, it is preferable that a capacitive element loaded on both sides of the groove in the conductive plate is provided in the antenna body.

In addition, with respect to the conductor, one of the two sides of the groove is set to a feeding point to which one of the positive potential and the negative potential is fed, and the other side is set to the ground potential. It is also possible to set a feeding point to be set to be unbalanced feeding type. Alternatively, a power supply point may be provided on the conductor so that one side and the other side of the two sides of the groove form a balanced circuit.

Here, the impedance of the antenna element may be adjusted by setting the feeding point at a position shifted to any end side from the center position in the length direction of the conductor plate.

Furthermore, a dielectric material is filled between the grooves of the conductive plate for the purpose of tuning the same wavelength as the case where the length of the antenna element is actually extended without actually extending the length. It is preferable to keep it. That is, when a dielectric material is filled in the elongated groove formed in the conductor plate, the wavelength of the electromagnetic wave propagating inside the dielectric material is shortened as shown by the following equation, and apparently, the antenna becomes The same effect as when the length of the element is increased can be obtained. Therefore, even when the length of the groove is short, a high antenna gain can be obtained for a long-wavelength electromagnetic wave.

λ ′ = λ / (ε ^1/2 ) λ ′: wavelength in the dielectric λ: wavelength in the air ε: relative permittivity of the dielectric It is preferable to form an extension so as to be able to cope with long-wavelength electromagnetic waves while maintaining the same band length.

When a metal band fastener is used as a band fastener provided on one end side of the band and enabling the band to be attached to an arm or the like, the metal fastener is used as a conductor plate. It is preferable to insulate and separate from. In this case, even if the band size is changed according to the thickness of the wearer's arm or the like, the tuning frequency is stable because the circumferential length of the groove of the conductive plate is constant.

Such an antenna device for a wireless device can be suitably used for an arm-mounted wireless device.

[Embodiment of the invention]

 Next, embodiments of the present invention will be described with reference to the drawings.

First Embodiment FIG. 1 is an explanatory view showing the structure of an antenna (conductive plate) in a wrist-mounted radio device (antenna device for a wrist-mounted radio device) according to a first embodiment of the present invention. FIG. 2 is a schematic perspective view showing the external appearance of the wrist-mounted wireless device provided with the wrist device during use. In these figures, the wrist-mounted radio 10
Is a case body 11 (wireless device main body) in which a wireless circuit board is housed, and a first band body 12 connected to the side thereof.
a and a second band body 12b, and a wrist band 12 comprising the first and second band bodies 12a, 12b.
Among them, the metal middle fastener 121 (band fastener) is attached to the end of the first band body 12a, while the middle fastener 121 is mechanically mounted on the second band body 12b side. Are formed with a plurality of stop holes 122 which can be connected to the first hole. Here, the first
As shown in FIG. ₁ , a band-shaped conductor plate 1 in which a groove 13a having a width d1 is formed in the longitudinal direction of the band body 12a.
3 are integrally fixed, and by this conductor plate 13,
An antenna body 14 is configured. Here, as shown in FIG. 3, with respect to the conductor plate 13, a high-frequency amplifier in which a positive potential is supplied to one conductor portion (one conductor zone) 130a on both sides of the groove 13a is supplied. A first feeding point 131 is provided from the side of the circuit portion 17 (feeding circuit, radio circuit board), while the other conductive portion (the other conductive zone) 130b is set to the ground potential. A second power supply point 132 to be set is set,
It has an unbalanced power supply structure. Further, at positions near the first and second feeding points 131 and 132, the one-side conductor portion 130a and the other-side conductor portion of the conductor plate 13 are arranged so as to straddle the groove 13a.
130b and a capacitive element 19 loaded between
The tuning frequency defined by the inductance value and the capacitance value of the capacitor 19 can be adjusted by the capacitance value of the capacitance element 19. For this reason, the wrist-worn radio device 10 is
It has a structure such that it can be carried in a state of being worn on an arm via the arm 12, and can be used as a transmitter or a receiver corresponding to microwaves of a predetermined frequency.

As shown in FIG. 2, the wrist-mounted wireless device 10 having such a configuration includes a middle fastener 121 on the first band body 12a and a stop hole 122 on the second band body 12b. It is used in a state of being attached around the wrist. Here, the antenna body 14 is
Since the antenna body 14 is formed of the conductive plate 13 having a length L and a groove 13a narrower than the wavelength used, the antenna body 14
a is configured as a slot antenna on a finite ground that opens toward the outer peripheral side of the wrist band 12. For this reason, even if the locking position of the middle fastener 121 with respect to the fastening hole 122 is changed according to the thickness of the user's arm, the circumferential length of the groove 13a does not change, so that the tuning frequency of the antenna body 14 does not shift. ,
The antenna gain can be maintained at a high level regardless of the wearer. In particular, in a state where the arm on which the arm-mounted type radio device 10 is mounted is hung down, the groove 13a is open over a wide angle range in the horizontal plane. Since the directional characteristics of the direction, that is, the omnidirectionality are reduced, it is suitable for portable use. Also, as shown in FIG.
(High-frequency amplifier 17, circuit board for radio equipment) Feed point 1
Corresponding to the potential applied between 31,132, the groove 13a has
As shown in FIG. 4, an electric field E is generated. For this reason, it responds greatly to the magnetic field component from the opening direction of the groove 13a. Here, in a wireless device that is used by being worn on a human body, the electric field component is weakened by the human body, while the magnetic field component is enhanced by the human body. Therefore, the arm-mounted wireless device of this example that functions as a magnetic field detection type 10 exhibits a human body wearing effect (human body image effect) when worn on the human body, and has high sensitivity. Therefore, the wrist-mounted wireless device 10 has an antenna structure suitable as a wrist-mounted wireless device. Also, the middle fastener
It can be used even when the 121 is not locked in the stop hole 122. Furthermore, since the middle fastener 121 is not a component of the antenna body 24, if the surface state changes due to rust or the like, or even if deformation occurs, the antenna gain does not change. It is stable. In addition, since the surroundings of the antenna body 24 are completely covered, the antenna body 24 is protected from the influence of static electricity and the like, so that the damage and malfunction of the wrist-mounted wireless device 10 can be prevented.

(Modification of the first embodiment) Incidentally, in the FIG. 5, the antenna body 14 shown in FIG. 1, and extended to more width d ₂ of the width d ₁ of the groove 13a of the conductor plate 13 constituting The antenna body 14a of FIG. Here, the first
The antenna according to the first embodiment shown in FIG. 3 and FIG. 3, and the antenna according to a modification of the first embodiment shown in FIG.
14a have the same configuration as each other, and therefore, in FIG. 5, corresponding portions are denoted by the same reference numerals.
In the case of the antenna body 14a having such a configuration, the conductor plate 1
Since the width of the third groove 13b is relatively wide, the antenna body 14a is in a state in which the conductor plate 13 forms a loop antenna around the groove 13b. For this reason, the directivity of the antenna body 14a in the plane direction of the conductor plate 13 is based on the figure 8 directivity of the slot antenna indicated by the solid line 101 in FIG. It tends to shift to the characteristic side. Therefore, in the first embodiment and its modification, the grooves 13a, 13b of the antenna bodies 14, 14a are provided.
, It is possible to set the directional characteristics between the directional characteristics of the slot antenna and the directional characteristics of the bimorph monopole antenna.

In the wrist-mounted wireless device according to the first embodiment and its modification, a structure similar to the conductive plate 13 may be further provided on the second band body 12b side. Also, the antenna tuning capacitance element 19 may be a fixed capacitance capacitor, but adopts a variable capacitance capacitor,
The tuning frequency of the antenna bodies 14 and 14a may be arbitrarily changed.

Further, in the wrist-worn radio device according to the first embodiment and its modification, the wrist band 12 is composed of the first and second band bodies 12a and 12b.
One end of this band is fixed to the side of the case 11, while the other end (free end) is detachable from the side of the case 11. Thus, an arm-mounted wireless device may be configured.

Second Embodiment FIG. 7 is a cross-sectional view of an arm-mounted radio device (antenna device for an arm-mounted radio device) according to a second embodiment of the present invention.
FIG. 8 is a longitudinal sectional view thereof.

In these figures, an arm-mounted wireless device 20 of the present example includes a case body 21 (wireless device main body) in which a wireless circuit block 26 is housed, and a leather and silicone resin formed body connected to the side thereof. And a wrist band 22 including a first band body 22a and a second band body 22b formed of a rubber or urethane resin molded body. The first band body 22a and the second band body
Inside the band body 22b, a conductive plate 23 disposed so as to cross the inside of the case body 21 is integrally formed and fixed. A groove 23a is formed in the conductor plate 23 in the longitudinal direction, and the conductor plate 23 having the groove 23a is formed.
Thereby, the antenna body 24 of the arm-mounted radio device 20 is configured. Here, the conductor plate 23 is formed of a first band member 22a and a second band member 22b such as a sewn sheet-shaped insulating molded body or a bonded sheet-shaped insulating molded body.
May be provided inside. The conductor plate 23 is a thin plate that can be bent when the band 22 is worn on the arm. Higher ones are used. Here, the conductor plate 23 is formed inside the wristband 22 to form a structure in which the surface is completely covered, so that the conductor plate 23 has a structure that is hardly rusted. Those having high conductivity such as copper and silver can be used. The eighth
As shown in the figure, the conductor plate 23 is arranged inside the case body 21 so as to pass through the lower surface side of the circuit block 26 for radio equipment. A metal middle fastener 221 is attached to an end of the second band body 22a, and a stop hole 222 to which the middle fastener 221 can be mechanically connected is provided on the side of the first band body 22b. Are formed. For this reason, the wrist-worn radio device 20 can be mounted on the wrist via the wrist band 22, but since the middle fastener 221 is insulated and separated from the conductor plate 23, the middle fastener 221 is provided. The conductor 23 does not form a loop-shaped electric path even if the stop hole 222 and the stop hole 222 are engaged.

Further, as shown in an enlarged sectional view of the internal structure of the case body 21 in FIG.
The circuit case 266 has a radio circuit board 267 therein, and a variable capacitor 269 for adjusting the antenna tuning frequency is provided on the upper surface of the radio circuit board 267, while the radio circuit board 267 is provided on the lower surface. It has a battery 264 as a power supply unit for the circuit block 26. Further, on the side of the back cover 29, which is the lower side, a conductor plate 23 is placed via an insulating plate 268, and this conductor plate 23 and the radio circuit board 26
7 is connected by wiring through a conductive terminal 263. Here, by shifting the connection position between the conductive terminal 263 and the conductor plate 23 to the first band member 22a side or the second band member 22b side, the side of the conductor plate 23 and the radio circuit block
The impedance with 26 side can be adjusted. Further, the variable capacitor 269 is wired and connected to a structure loaded on both sides of the groove 23a of the conductor plate 23, similarly to the wireless device according to the first embodiment. Further, a high-frequency amplifier circuit section (not shown) formed on the wireless device circuit board 267 of the wireless device circuit block 26 is conductively connected to one of the grooves 23a formed on the conductor plate 23. On the other hand, the other side is fixed to the ground state, and has an unbalanced power supply structure. The radio circuit block 26 is provided with a clock circuit and a display circuit for displaying the clock information, while a liquid crystal display panel or the like is provided on the upper surface side of the case body 21 to provide a clock function. The structure is provided to the wearable radio device 20.

The arm-mounted radio device 20 having such a configuration can be used as a transmitter or a receiver while being attached to an arm, similarly to the arm-mounted radio device according to the first embodiment. Even when the portable radio device 20 is mounted on the arm, the antenna body 24 is in the state shown in FIG. 10, and since the conductor plates 23 do not overlap each other, the locking of the middle fastener 221 to the stop hole 222 is performed. Even when the position is changed, the tuning frequency does not shift. Further, in the wrist-worn radio device 20 of the present example, since the groove 23a is formed over substantially the entire length of the conductor plate 23 in the longitudinal direction, the groove 23a extends over substantially the entire outer circumferential direction of the wristband 22. It is open towards. For this reason, in a state where the arm on which the arm-mounted type radio device 10 is mounted is hung down, the groove 23a is open in any direction of the horizontal plane, and the directional characteristics thereof are almost non-directional. Because there is no null point, it is suitable for portable use. Also, since it functions as a magnetic field detection type, it has high sensitivity when worn on a human body.

(Modification of Second Embodiment) FIG. 11 (a) is a cross-sectional view of an arm-mounted radio (an antenna device for an arm-mounted radio) according to a modification of the second embodiment of the present invention. FIG. 2B is a longitudinal sectional view thereof. Note that the wrist-mounted wireless device of this example is the same as that of the wrist-mounted wireless device shown in FIGS.
Since the configuration is substantially the same as that of the wrist-mounted radio device according to the embodiment, the corresponding portions are denoted by the same reference numerals.

In these figures, the wrist-mounted wireless device 20a of the present example includes:
Case body 21 in which wireless circuit block 26 is arranged
(Radio device body) and a wrist band 22 composed of a first band body 22a and a second band body 22b made of leather, a silicon resin formed body, a urethane resin molded body, or the like connected to the side thereof. Have. Among these first band body 22a and second band body 22b, first band body 22a includes:
A conductor plate 23 having a groove 23a formed in the length direction is integrally fixed, and the conductor plate 23 constitutes an antenna 24a of the arm-mounted radio device 20. As shown in FIG. 11 (b), one end of the conductive plate 23 is located between the radio circuit block 26 and the back cover 29 inside the case body 21. Between them, the conductor plate 23 and the radio circuit block 26 are connected by wiring. Further, the radio device circuit block 26 has a variable capacitor (not shown) for adjusting the antenna tuning frequency, and this variable capacitor is loaded on both sides of the groove 23 a with respect to the conductor plate 23. I have. A metal middle fastener 221 is attached to the end of the second band body 22a, while the first
On the side of the band body 22b, a plurality of stop holes 222 to which the middle fastener 221 can be mechanically connected are formed, so that the wrist-worn radio device 20a can be mounted on the arm via the wrist band 22. ing.

The wrist-mounted wireless device 20a having such a configuration can be used while being worn on the wrist, and has the same effect as the wrist-mounted wireless device according to the second embodiment. However, since the length of the conductor plate 23 is short, the antenna gain is lower than that of the wrist-mounted wireless device of the second embodiment, so that there are restrictions on the range of use, but the number of components is small. Is simple, which is advantageous in terms of cost and high in reliability.

Third Embodiment FIG. 12 is a cross-sectional view showing a configuration around a case body of an arm-mounted radio device (an antenna device for an arm-mounted radio device) according to a third embodiment of the present invention, and FIG. FIG. In the wrist-mounted wireless device of the present embodiment, parts such as an arm-mounted band (not shown) are the same as those of the wrist-mounted wireless device according to the second embodiment.

In these figures, the wrist-mounted wireless device 30 of the present example includes a case body 31 (wireless device main body) in which a wireless circuit block 36 is disposed, and a resin molded body connected to the side thereof. An arm mounting band including a first band body 32a and a second band body 32b, and the first band body
A first conductor plate 331 and a second conductor plate 332 are integrally formed and fixed to the 32a and the second band body 32b, respectively. Further, the grooves 33a, 33b are formed on either side of the first conductor plate 331 and the second conductor plate 332 in the longitudinal direction.
The first conductor plate 331 and the second conductor plate 332 having the grooves 33a and 33b constitute the antenna body 34 of the wrist-mounted radio device 30.

Here, the grooves 33a and 33b extend from the edges of the first conductor plate 331 and the second conductor plate 332 on the case body 31 side to the lengths of the first conductor plate 331 and the second conductor plate 332, respectively. The grooves 33a and 33b are open ends at the edges of the first conductive plate 331 and the second conductive plate 332 on the case body 31 side. Therefore, the first conductor plate 3 is formed by the grooves 33a and 33b.
The side 31 is separated into one end 331a and the other end 331b, and the side of the second conductive plate 332 is separated into one end 332a and the other end 332b. The one end 331a of the first conductive plate 331 and the one end 332a of the second conductive plate 332 are in a state of being connected by wiring inside the case body 31, and the first conductive The other end 331b of the plate 331 and the second
The other end 332b of the conductor plate 332 is connected to the wiring inside the case body 31. That is, in the case body 31, two conductive terminals 321a, 321b, 321c, and 321d are integrally formed on both side surfaces of the case body 31, respectively. 331 one side end 3
31a, the other end 331b, the one end 332a of the second conductor plate 332 and the other end 332b are conductively connected by soldering or the like. In addition, the conductive terminal 321a and the conductive terminal 321c are conductively connected via the one-side circuit pattern 367a of the wireless device circuit board 367 of the wireless device circuit block 36, while the conductive terminal 321b and the conductive terminal 321c are electrically conductive. The terminal 321d is conductively connected via the other-side circuit pattern 367b of the wireless device circuit board 367. Further, as shown in FIG. 13, the conductive terminals 321a, 321b, 321c, 321d have a bent portion on the conductive connection position side with the radio circuit block 36, and the wireless terminal has a spring property by the bent portion. It is electrically connected to one side circuit pattern 367a and the other side circuit pattern 367b of the machine circuit board 367. For this reason, vibration and the like do not propagate inside the case body 31. A variable capacitor 369 for adjusting the antenna tuning frequency is loaded between the one-side circuit pattern 367a and the other-side circuit pattern 367b, and a battery 364 is disposed on the lower surface side of the radio device circuit board 367. .

In the arm-mounted wireless device 30 having such a configuration, the second
In addition to the effects obtained in the wrist-mounted wireless device according to the embodiment, the following effects are also obtained. That is, both the first conductor plate 331 and the second conductor plate 332 are formed on the first band body 32a or the second band body 32b side, and the case body 31 side is connected to the conductive terminal. Conductive connection is made via 321a, 321b, 321c, 321d, and the case body 31 side and the arm mounting band side are separate bodies. Therefore, if only the side of the wristband is damaged during use of the wristband wireless device 30, it is also easy to remove the wristband side from the case body 31 and replace it. . Also, arm-mounted radio
Since 30 can be manufactured for each member, there is also an effect that productivity is high.

Fourth Embodiment FIG. 14 is a cross-sectional view showing a configuration around a case body of an arm-mounted radio device (antenna device for an arm-mounted radio device) according to a fourth embodiment of the present invention, and FIG. FIG. The wrist-mounted wireless device of the present embodiment is similar to the wrist-mounted wireless device according to the second embodiment with respect to parts such as an arm-mounted band (not shown).

In these figures, the wrist-mounted wireless device 40 of the present example has a case body 41 (radio device main body) in which a wireless circuit block 46 is disposed, and a first member such as leather connected to a side portion thereof. The first band member 42a and the second band member 42b have a first conductive plate 431 and a second conductive member. The body plates 432 are integrally formed and fixed. The first conductor plate 431 and the second conductor plate 4
On either side of 32, grooves 43a, 43b are formed in the longitudinal direction, and the first conductor plate 431 and the second conductor plate 432 having these grooves 43a, 43b form an arm mounting type. An antenna body 44 of the wireless device 40 is configured.

Here, the grooves 43a and 43b extend from the edges of the first conductor plate 431 and the second conductor plate 432 on the side of the case body 41 to the lengths of the first conductor plate 431 and the second conductor plate 432, respectively. The grooves 43a and 43b are open ends at the edges of the first conductive plate 431 and the second conductive plate 432 on the case body 41 side. For this reason, the side of the first conductor plate 431 is separated into one end 431a and the other end 431b, and the side of the second conductor plate 432 is also separated into the one end 432a and the other end 432b. Are separated. The one end 431a of the first conductor plate 431 and the one end 432a of the second conductor plate 432 are in a state of being connected by wiring inside the case body 41.
The other end 431b of the conductive plate 431 and the other end 432b of the second conductive plate 432 are in a state of being wired and connected inside the case body 41. That is, one end 431a, the other end 431b of the first conductor plate 431, the second conductor plate 432
The one end 432a and the other end 432b are fixed to the conductive terminals 421a, 421b, 421c, 421d, respectively, while the inner peripheral surface of the case body 41 has two wiring portions 41a, 41b
Are formed. Of these wiring portions 41a and 41b, conductive terminals 421a and 421c are conductively connected to wiring portion 41a, and
Conductive terminals 421b and 421d are conductively connected to 41b. Here, the end portions 411a, 411b, 411c, 411d of the wiring portions 41a, 41b that are conductively connected to the conductive terminals 421a, 421b, 421c, 421d,
Terminal insertion holes 412a, 412b, 412c, 412 formed in case body 41
It is located at a position corresponding to the formation position of d. For this reason, when the conductive terminals 421a, 421b, 421c, 421d are pushed into the terminal insertion holes 412a, 412b, 412c, 412d from the outside of the case body 41, their respective tips are connected to the ends of the wiring portions 41a, 41b. Parts 411a, 411b, 411c,
It comes in contact with the deformed 411d. Therefore, the conductive terminals 421a, 421b, 421c, 421d and the wiring portions 41a, 41b are in a state of being in reliable contact with the ends 411a, 411b, 411c, 411d due to the return force from the deformed state. The circuit block 46 including the variable capacitance capacitor 469 for adjusting the antenna tuning frequency is disposed inside the case body 41, and the variable capacitance capacitor 469 is connected to the wiring portion 41a via conductive terminals 46a and 46b having a spring property. , 41b.

In the arm-mounted radio device 40 having such a configuration, the third
An effect similar to that of the embodiment is obtained. That is, the conductive terminals fixed to the first conductive plate 431 and the second conductive plate 432
421a, 421b, 421c, 421d are detachable from the case body 41, so that only the wristband side is damaged while using the wrist-mounted radio 40, It is also easy to remove the side of the wrist band from the case body 41 and replace it. Also, since it can be manufactured for each member,
It also has the effect of being easy to produce. Further, wiring portions 41a and 41b for conductively connecting the first conductor plate 431 and the second conductor plate 432 are formed on the inner peripheral surface on the side surface side of the inner peripheral surface of the case body 41. Therefore, these wiring portions 41a, 41b
It is not necessary to make the case 41 high when connecting the wiring with the circuit block 46 for radio equipment. Therefore, it is possible to reduce the thickness of the wrist-mounted wireless device 40 and improve its portability. In addition, while maintaining the height of the case body 41 as it is, a component for providing a clock function is provided in the case body 41.
The degree of freedom of design is increased, for example, it can be provided in the thickness direction.

Fifth Embodiment FIG. 16 is an exploded perspective view of a wrist-mounted radio device (an antenna device for a wrist-mounted radio device) according to a fifth embodiment of the present invention as viewed from the rear side. FIG. 17 (a) is a cross-sectional view thereof,
FIG. 17 (b) is a longitudinal sectional view thereof.

In these figures, an arm-mounted wireless device 50 of the present example includes a case body 51 (wireless device main body) in which a wireless circuit block 56 is disposed and a first member such as leather connected to a side portion thereof. The first band member 52a and the second band member 52b have a first conductor plate 531 and a second band member 52b. The conductor plates 532 are integrally formed and fixed. Grooves 53a and 53b are formed in the longitudinal direction on both sides of the first conductor plate 531 and the second conductor plate 532, and the first conductor having the grooves 53a and 53b is formed. The plate 531 and the second conductive plate 532 form the antenna 54 of the wrist-mounted radio 50. In addition, the first conductor plate
The width of the 531 and the second conductor plate 532 is changed in the length direction, and the antenna resistance is designed to be small so as to secure the widest possible width in each part.

Here, the grooves 53a and 53b extend from the edges of the first conductor plate 531 and the second conductor plate 532 on the case body 51 side to the first conductor plate 531 and the second conductor plate 532, respectively. The grooves 53a and 53b are open ends at the edges of the first conductor plate 531 and the second conductor plate 532 on the case body 51 side, which are formed in the length direction. For this reason, at each edge of the first conductive plate 531 and the second conductive plate 532, the first conductive plate 531 is connected to the one end 531a and the other end 531b by the grooves 53a and 53b. The second conductor plate 532 is also separated into one end 532a and the other end 532b. The one end 531a of the first conductive plate 531 and the one end 532a of the second conductive plate 532 are connected by wiring via the case body 51, and similarly, the first conductive plate 531 The other end 531b of the body plate 531 and the other end 532b of the second conductive plate 532 are connected to each other via the case body 51. That is, the first conductor plate
531 and one end 531a, 532a and the other end 531b, 532b of the second conductor plate 532 are electrically conductive terminals 521a, 521b, 521b.
c, 521d, fixed by spot welding, etc.
The distal ends of 1a, 521b, 521c, 521d protrude from the projections 522a, 522b, 522c, 522d of the first band body 52a and the second band body 52b.

On the other hand, inside the case body 51, the terminal pieces 568a and 568b are fixed to the end of the circuit pattern 567a on one side of the radio circuit board 567 of the radio circuit block 56 by soldering or the like, and the other side. Terminal strip 56 on the end of circuit pattern 567b
8c and 568d are fixed with solder or the like. Here, each of the terminal pieces 568a, 568b, 568c, 568d is bent at a plurality of locations and has a spring property, and the arrangement position is formed by forming the terminal insertion holes 512a, 512b, 512c, 512d of the case body 56. It corresponds to the position.

Therefore, the first band member 52a and the second band member 5
When the protrusions 522a, 522b, 522c, 522d of 2b are fitted into the terminal insertion holes 512a, 512b, 512c, 512d of the case body 56, the conductive terminals 521
a, 521b, 521c, 521d and the terminal pieces 568a, 568b, 568c, 568d are in conductive contact, and one end 531a of the first conductor plate 531 and one end of the second conductor plate 532 are contacted. Wiring connection with 532a,
Similarly, the other end 531b of the first conductor plate 531 and the other end 532b of the second conductor plate 532 are connected by wiring. In this state, the first band body 52a and the second band body 52b are respectively fixed to the side surfaces of the case body 51 by a detachable fixing mechanism.

Here, in the case body 51, the terminal insertion holes 512a, 512b,
512c and 512d are the first band body 52a and the second band body 52a.
It is sealed by the protruding portions 522a, 522b, 522c, 522d of b, and a back cover 59 is attached to the back side to ensure its waterproofness. The first band member 52a and the second band member 5
As a fixing mechanism between the case 2b and the case body 51, for example, a well-known structure employed for fixing a band such as a wristwatch and a watch main body can be employed.

On the circuit board 567 for the radio device, a variable capacitor 569 for adjusting the antenna tuning frequency is mounted between the circuit pattern 567a on one side and the circuit pattern 567b on the other side. The condenser 569 is loaded on both sides of the groove 53a with respect to the antenna body 54. In the wrist-mounted wireless device 50 of this example, a liquid crystal display panel (not shown) is provided on the front side of the case body so that it can be used as a clock, while the circuit block 56 is provided.
Is also provided with a clock circuit, a display panel driving circuit (not shown) for displaying the clock circuit, and the like.

In the wrist-mounted radio device 50 having such a configuration, even when the wrist-worn radio device 50 is mounted on the wrist, the antenna body 54 has its first
Since the conductive plate 531 and the second conductive plate 532 do not overlap each other, the peripheral length of the groove 53a is constant regardless of the band size of the wrist band 52. Therefore, since the tuning frequency does not shift, regardless of the wearer,
The antenna gain can be maintained at a high level. Further, in a state where the arm on which the arm-mounted radio device 50 is mounted is hung down, the grooves 53a and 53b are open in almost all directions on the horizontal plane, and the frequency in this state is approximately 284 MHz. reception sensitivity to waves, the measurement results as shown by the solid line a ₁ in FIG. 18, a non-directional. Here, FIG. 18 shows the characteristics in the case where the arm-mounted radio 50 is installed alone so as to have the same posture as the state in which the arm with the arm-mounted radio 50 is hung down is indicated by a dotted line B _1. Indicated by Here, when comparing the characteristics shown by the solid line A ₁ and the dotted line B _1, but both are non-directional, the sensitivity tends to be high who when wearing the wrist-worn wireless device 50 to the arm. That is, since the arm-mounted radio device 50 of the present example is of the magnetic field detection type, the sensitivity is improved by being mounted on a human body. Further, when the wearer is changed and the arm-mounted radio device 50 of the present example is mounted, and when the arm-mounted radio device 50 is independently installed under the conditions corresponding to this state, the frequency of the vertical polarization of about 284 MHz is set. Even when the sensitivity to waves is measured, no significant change is observed in the directivity and antenna gain, and it has been confirmed that high sensitivity and omnidirectional antenna characteristics are maintained. Furthermore, for the case where the arm on which the arm-mounted radio 50 is mounted is leveled in front of the wearer's own left chest and when the arm-mounted radio 50 is installed alone in a state corresponding to this state, Even when measuring the sensitivity to vertical polarization at a frequency of about 284 MHz, the result is relatively high sensitivity and omni-directional as shown by the solid line A ₂ (mounted state) and the dotted line B ₂ (single state) in FIG. FIG.

Further, in the wrist-mounted wireless device 50 of the present embodiment, the first conductive plate 531 and the second conductive plate 532 are similar to the wrist-mounted wireless devices according to the third embodiment or the fourth embodiment. Case body 51
Are electrically connected to each other via conductive terminals 521a, 521b, 521c, 521d, and the case body 51 side and the arm mounting bunt 52 side are separate bodies. Therefore, if the side of the wristband 52 is damaged while using the wristband radio 50, it is easy to remove the wristband 52 from the case body 51 and replace it. is there. In addition, since each member can be manufactured, there is an effect that the production is easy.

Sixth Embodiment FIG. 20 is a configuration diagram of an antenna body in a wrist-mounted wireless device (antenna device for a wrist-mounted wireless device) according to a sixth embodiment of the present invention. Note that the configuration of the wrist-mounted wireless device of this example is the same as the configuration of the wrist-mounted type according to the first to fifth embodiments, and only the power supply structure for the conductor plate is different. Will be described only.

In this figure, as a feeding structure for the antenna body 64 of the wrist-mounted wireless device, in response to a request from the wireless device circuit side, on both sides of the groove 63a of the conductor plate 63, the electrical characteristics are equivalent. That is, the feeding points 64a and 64b are provided so as to provide balanced feeding. As described above, either the balanced power supply structure or the unbalanced power supply structure can be employed in accordance with the configuration of the wrist-mounted radio device on the radio circuit side.

Seventh Embodiment FIG. 21 is a configuration diagram of an antenna body in a wrist-mounted radio (an antenna device for a wrist-mounted radio) according to a seventh embodiment of the present invention. The configuration of the wrist-mounted wireless device of this example is the same as the configuration of the wrist-mounted type according to the first to fifth embodiments, and only the power supply structure for the conductor plate is different. I will explain only.

As shown in this figure, in the antenna body 74 of the wrist-mounted wireless device of the present example, the feeding points 74a, 74b are moved from the intermediate position in the length direction to the end side in accordance with the impedance value of the conductor plate 73. For example, the distance of x is shifted. Therefore, the impedance between the antenna 74 and the radio circuit can be adjusted without changing the structure of the conductor plate 73 or the configuration of the radio circuit.

(Eighth Embodiment) FIG. 22 (a) is a cross-sectional view showing the configuration of an antenna unit in an arm-mounted radio device (antenna device for an arm-mounted radio device) according to an eighth embodiment of the present invention. FIG. 2B is a longitudinal sectional view thereof. The configuration of the wrist-mounted wireless device of this example is the first type.
The configuration is the same as that of the arm-mounted type according to the embodiment to the fifth embodiment, and only the configuration inside the groove of the conductor plate is different. Therefore, only the configuration will be described.

As shown in this figure, in the antenna body 84 of the wrist-mounted wireless device of this example, a groove 83a is formed in the length direction of the conductor plate 83, and a dielectric material such as silicon or ceramics is formed inside the groove 83a. The layer 85 is filled, and the outer peripheral side is covered with an insulating band body 82. Where the antenna body
The wavelength of the electromagnetic wave propagating inside the 84 dielectric layer 85 is represented by the following equation.

λ ′ = λ / (ε ^1/2 ) λ ′: wavelength in dielectric λ: wavelength in air ε: relative permittivity of dielectric That is, the wavelength of the electromagnetic wave propagating inside the dielectric layer 85 is dielectric The larger the dielectric constant of the layer 85 itself, the shorter it is, apparently,
The same effect as in the case where the circumferential length of the groove 83a of the conductor plate 83 (the antenna body 84) is increased. Therefore, a high antenna gain can be obtained for a long wavelength electromagnetic wave while the peripheral length of the groove 83a is kept short. Conversely, the length of the antenna body 84 that can be tuned to electromagnetic waves of the same wavelength can be shortened. Note that the structure may be such that not only the inside of the groove 83a is filled with the dielectric layer 85 but also the entire conductive plate 83.

Ninth Embodiment FIG. 23 is a configuration diagram of an antenna unit in a wrist-mounted wireless device (an antenna device for a wrist-mounted wireless device) according to a ninth embodiment of the present invention. Note that the configuration of the wrist-mounted wireless device of this example is the same as the configuration of the wrist-mounted type wireless device according to the first to fifth embodiments, and only the groove shape formed on the conductor plate is different. Only the structure will be described.

As shown in this figure, in the antenna body 94 of the wrist-mounted wireless device according to the present example, the groove 93a extends in the length direction of the conductive plate 93.
Are formed at both ends and at an intermediate position of the groove 93a, and extended portions 931a and 931b in which the width of the groove 93a is expanded are formed. For this reason, since the peripheral length of the groove 93a of the antenna body 94 is substantially extended, a high antenna gain can be obtained with respect to long-wavelength electromagnetic waves without extending the length dimension of the antenna body 94. .

In each of the above embodiments, the groove formed in the conductor plate has a structure that linearly extends in the length direction of the conductor plate. May be secured for a long time. Further, the configuration of the arm mounting band is not limited to a metal arm mounting band to which a conductive plate is fixed via an insulator, even if the whole is not insulating. Further, the constituent elements of the wrist-mounted wireless devices of the first to ninth embodiments may be combined.

〔The invention's effect〕

As described above, in the radio antenna device according to the present invention, the antenna element is formed by the band-shaped conductor plate having the groove formed in the length direction of the plate surface with respect to the band that can be worn on the arm or the like. It has a special feature. Therefore, according to the present invention, the following effects can be obtained.

Regardless of the band size, the conductor plate provided with the groove itself forms an antenna element similar to a slot antenna, so that the tuning frequency does not shift depending on the band size, and a high antenna gain can be maintained.

Further, the antenna element exhibits a function as a circumferential slot antenna on a finite ground when attached to an arm, and therefore has omnidirectionality and is suitable for portable use.

Furthermore, since the band fastener is not a component of the antenna body, the antenna gain does not change and is stable even when the surface state changes or deformation occurs due to rust or the like generated on the band fastener.

In particular, since the antenna opening area can be increased by approximately the square of the length of the strip-shaped conductor plate, the antenna gain is greatly improved. Further, since the antenna element can be constituted by only one band-shaped conductor plate, the band itself can be made thinner and lower in cost, and the durability as an antenna can be maintained even when the antenna is repeatedly bent at the time of attachment and detachment.

Here, when the conductor plate side and the inner side of the case body are electrically connected via the conductive terminal, each is separated therefrom, and only the wrist band to which the conductor plate is fixed is attached. Can be easily replaced, so that it is easy to use.

Further, when a circuit pattern formed along the inner peripheral surface of the case body is used for an electric path, the space inside the case can be saved, and the case body can be made thinner.

Furthermore, when capacitive elements are loaded on both sides of the groove in the conductor plate, the tuning frequency can be adjusted without changing the structure of the antenna element.

In addition, when the impedance of the antenna element is adjusted by setting the feeding point at a position shifted to any end side from the center position in the length direction of the conductor plate, without changing the configuration of other parts In addition, impedance adjustment between the antenna element and the radio device circuit can be performed.

In addition, when a dielectric is filled between the grooves of the conductive plate, or when an extended portion having a groove width to extend the peripheral length of the groove is formed, the electromagnetic wave of a long wavelength is kept at the same band length. Can also be accommodated. Conversely, for an electromagnetic wave having the same wavelength, tuning can be performed with a short antenna element, so that the antenna element can be downsized.

Further, when the metal band fastener of the wristband is insulated and separated from the conductor plate, the antenna gain is stabilized because the influence of the band fastener does not affect the tuning frequency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a structure of an antenna body of a wrist-mounted wireless device according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the appearance of the wrist-mounted radio equipped with the antenna body shown in FIG. 1 at the time of use.

FIG. 3 is a configuration diagram of an arm-mounted wireless device including the antenna body shown in FIG.

FIG. 4 is an explanatory diagram showing a state where power is supplied to the antenna body shown in FIG.

FIG. 5 is an explanatory view showing a structure of an antenna body of a wrist-mounted radio device according to a modification of the first embodiment of the present invention.

FIG. 6 is a graph for explaining directivity in the first embodiment of the present invention and its modification.

FIG. 7 is a cross-sectional view of an arm-mounted radio device according to a second embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view of the wrist-mounted radio shown in FIG.

FIG. 9 is a longitudinal sectional view of the inside of the case body of the wrist-mounted wireless device shown in FIG.

FIG. 10 is an explanatory diagram for explaining the directivity of the antenna body when the arm-mounted radio device shown in FIG. 7 is attached to the arm.

FIG. 11 (a) is a cross-sectional view of a wrist-mounted wireless device according to a modification of the second embodiment of the present invention, and FIG. 11 (b) is a longitudinal sectional view thereof.

FIG. 12 is a cross-sectional view showing a configuration around a case body of an arm-mounted radio device according to a third embodiment of the present invention.

FIG. 13 is a longitudinal sectional view showing a configuration around the case body of the wrist-mounted radio shown in FIG.

FIG. 14 is a cross-sectional view showing a configuration around a case body of an arm-mounted radio device according to a fourth embodiment of the present invention.

FIG. 15 is a longitudinal sectional view showing a configuration around a case body of the wrist-mounted radio shown in FIG.

FIG. 16 is an exploded perspective view of the wrist-mounted wireless device according to the fifth embodiment of the present invention, as viewed from the back side around the case body.

FIG. 17 (a) is a cross-sectional view of the wrist-mounted radio shown in FIG. 16, and FIG. 17 (b) is a longitudinal cross-sectional view thereof.

FIG. 18 is a graph showing the directivity in the horizontal plane direction of the wrist-mounted radio in a state where the arm on which the wrist-mounted radio shown in FIG. 16 is mounted is hung down.

FIG. 19 is a graph showing the directivity in the horizontal plane direction of the wrist-worn radio in a state where the arm on which the wrist-worn radio shown in FIG. 16 is mounted is bent horizontally in front of the chest.

FIG. 20 is a configuration diagram of an antenna of a wrist-mounted radio device according to a sixth embodiment of the present invention.

FIG. 21 is a configuration diagram of an antenna of a wrist-mounted radio device according to a seventh embodiment of the present invention.

FIG. 22 (a) is a cross-sectional view showing the configuration of the antenna body of the wrist-mounted wireless device according to the eighth embodiment of the present invention, and FIG. 22 (b) is a longitudinal sectional view thereof.

FIG. 23 is a configuration diagram of an antenna of a wrist-mounted radio device according to a ninth embodiment of the present invention.

FIG. 24 is a configuration diagram of an antenna body of a conventional wrist-mounted wireless device.

FIG. 25 is an equivalent circuit diagram of the wrist-mounted radio shown in FIG.

[Explanation of symbols]

10,20,30,40,50… Wrist-mounted radio 11,21,31,41,51… Case body 12,22… Wrist band 12a, 22a, 32a, 42a, 52a 1 band body 12b, 22b, 32b, 42b, 52b ... second band body 13, 23, 63, 83, 93 ... conductor plate 13a, 23a, 33a, 33b, 43a, 43b, 53a, 53b, 63a, 83a, 93a …… Groove 14,14a, 24,34,44,54,64,74,84,94 …… Antenna body (antenna element) 15… Feeding circuit 17 …… High frequency amplifier 19 …… Capacity Elements 26, 36, 46, 56 Wireless circuit block 29, 59 Back cover 41a, 41b Wiring part 46a, 46b Conductive terminal 64a, 64b, 74a, 74b Feed point 82 Band body 85 Dielectric layers 121, 221 Middle fasteners 122, 222 Stop holes 130a One-side conductor (one-side conductor zone) 130b Other-side conductor (other-side conductor zone) 131 First feeding point 132 ... Second feeding point 263,321a to 321d, 421a to 421d, 521a to 521d ... Conductive terminal 264,364 ... Battery 266 ... Circuit case 267,367,567 ... Radio circuit board 268 ... Insulating plate 269,369,469,569 ... Variable capacitor for adjusting antenna tuning frequency 331,431,531 ... First conductive plate 331a, 332a, 431a, 432a, 531a, 532a ... One end 331b, 332b, 431b, 432b, 531b, 532b… The other end 332, 432, 532… Second conductor plate 367a, 567a… One side circuit pattern 367a, 567a… The other side circuit pattern.

411a to 411d: Ends 412 to 412d, 512a to 512d: Terminal insertion holes 522a to 522d: Projections 568a to 568d: Terminal strips 931, 931b: Extensions.

Claims (14)

(57) [Claims] An antenna element comprising a case body, bands connected to both sides thereof, and a flexible band-shaped conductor plate provided along the length direction of the band,
The antenna device for a radio device, wherein the strip-shaped conductor plate has a groove formed along a length direction of the plate surface. 2. A band comprising a case body, a first band body and a second band body connected to both sides thereof, and a longitudinal direction of at least one of the first and second band bodies. And an antenna element having a flexible strip-shaped conductor plate provided along, and the strip-shaped conductor plate has a groove formed along the length direction of the plate surface. An antenna device for a wireless device. 3. A case body, a band having a first band body and a second band body connected to both sides thereof, and a band provided along a length direction of each of the first and second band bodies. And an antenna element having flexible first and second strip-shaped conductor plates, wherein the first and second strip-shaped conductor plates are respectively arranged from the edge on the case body side to the plate surface. It is provided with a groove formed along the length direction, and one side conductor zone and the other side conductor zone of the first band-shaped conductor plate separated by opening the groove and the second band conductor plate. In the one-side conductor zone and the other-side conductor zone, the ends of the one-side conductor zone on the side of the case body and the ends of the other-side conductor zone on the side of the case body respectively pass through the electric path on the case body side. Characterized by being electrically connected Machine for the antenna device. 4. The radio device according to claim 3, wherein the electric path includes a wiring portion serving as a circuit pattern of a radio device circuit board disposed inside the case body. Antenna device. 5. The antenna device for a radio device according to claim 3, wherein the electric path includes a wiring portion formed along an inner peripheral surface of the case body. 6. In claim 4 or claim 5,
The wireless device is characterized in that the band-shaped conductor plate side and the wiring portion side are electrically connected via a conductive terminal fixed to at least one of the case body side and the band-shaped conductor plate side. Machine antenna device. 7. The antenna device according to claim 1, wherein the antenna element includes a capacitive element loaded on both sides of the groove in the strip-shaped conductor plate. An antenna device for a wireless device. 8. The strip-shaped conductor plate according to claim 1, wherein the strip-shaped conductor plate has a positive potential and a negative potential on one of both sides of the groove. Characterized in that there is a feeding point to which any one of the potentials is fed, and a feeding point to which a ground potential is applied on the other side. 9. The strip-shaped conductive strip according to any one of claims 1 to 7, wherein one and both of the two sides of the groove form a balanced circuit. An antenna device for a radio device having a set feeding point. 10. The power supply point according to claim 8, wherein the power supply point is located at a predetermined position on one of the two end portions from the center in the length direction of the strip-shaped conductor plate. An antenna device for a wireless device, which is located at a position shifted from the distance. 11. An antenna device for a radio device according to claim 1, wherein a dielectric is filled in said groove. 12. A groove according to any one of claims 1 to 11, wherein the groove is formed with an extended portion having a groove width whose peripheral length is to be extended. An antenna device for a wireless device. 13. A band fastener according to any one of claims 1 to 12, wherein said band fastener is provided on a free end side of said band and connects said free ends of said band. An antenna device for a wireless device, wherein a conductive band fastener is used, and the conductive band fastener is insulated and separated from the strip-shaped conductor plate. 14. A wrist-worn radio device comprising the radio device antenna device defined in any one of claims 1 to 13.