Source: https://patents.google.com/patent/US9859605B2/en
Timestamp: 2018-07-22 18:57:09
Document Index: 642465414

Matched Legal Cases: ['art 24', 'art 24', 'art 24', 'art 24', 'art 24', 'art 24', 'art 24', 'art 24', 'art 24', 'art 24']

US9859605B2 - Antenna device, conversion adaptor, and receiver - Google Patents
US9859605B2
US9859605B2 US12729431 US72943110A US9859605B2 US 9859605 B2 US9859605 B2 US 9859605B2 US 12729431 US12729431 US 12729431 US 72943110 A US72943110 A US 72943110A US 9859605 B2 US9859605 B2 US 9859605B2
US12729431
US20100245185A1 (en )
The present invention relates to an antenna device, a conversion adaptor, and a receiver, which are applicable to portable electronics, such as potable AV equipment and cell phones.
In addition, various kinds of rod antennas provided with rotation mechanisms, such as hinges, have been proposed (see, for example, Japanese Unexamined Patent Application Publication Nos. 2007-67774, 2002-26622, and 11-355019. The rod antennas disclosed in these patent documents typically desire complicated structures for the rotation mechanism. For addressing such a matter, Japanese Unexamined Patent Application Publication No. 2007-281832 proposes that the use of a round-shape plug.
However, the antenna device disclosed in Japanese Unexamined Patent Application Publication No. 2007-281832 is typically provides with a complicated structure for connection between a plug and an antenna member. In addition, the antenna device disclosed in this patent document is also provided with an electrical connection mechanism, such as one processed by soldering the parts to a connector member. Thus, additional parts are typically used for the process. Furthermore, such a kind of the antenna device is typically provided with many parts for connecting the rod antenna member to the plug.
Any of the antenna devices disclosed in the aforementioned patent documents, Japanese Unexamined Patent Application Publication Nos. 2007-67774, 2002-26622, and 11-355019, employs a thread connection as a way of attaching the rod antenna to the electronic apparatus, such as a cell phone. Thus, the rod antenna is a threaded one. In such an electronic apparatus, in general, the rod antenna mechanism is installed in the inside thereof so that the rod antenna can be extended in use. However, the main body of the apparatus is typically provided with a redundant space for installing the rod antenna in the apparatus. Thus, the configuration of the apparatus is complicated. Specifically, so-called one-segment broadcasting which has been started recently and some of mobile communication apparatuses, such as cell phones and mobile terminal devices, are configured to watch TV programs. In any of these apparatuses, the use of rod antenna leads to an increase in size and complicates the configuration thereof.
An antenna device according to a first embodiment of the present invention includes: a round plug having a rotation mechanism section on one end thereof, where the round plug is removably attached to a round jack arranged in an electronic apparatus; and a rod antenna element. In this antenna device, the rod antenna element is connected to the rotation mechanism section of the round plug and rotatable in a predetermined direction.
According to any embodiment of the present invention, there is provided any of an antenna device, a conversion adapter, and a receiver, which can reduce the number of components and the number of manufacturing steps, minimize the size and cost of the device, allow the device to be removably attached to an electronic apparatus without difficulty, and prevents the receiver sensitivity from deteriorating.
FIGS. 2A to 2C are diagrams illustrating an exemplary configuration of an antenna device as a first embodiment of the present invention;
Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The embodiments will be described in the following order:
The antenna device 10 is formed as a rod antenna at (¼)λ of the UHF band in extension and designed for reception of television signals at the UHF band (470 MHz to 890 MHz). In contrast, the antenna device 10 is approximately 110 mm in length (indicated by the arrow “A” in the figure). Specifically, for example, it may be 113.5 mm in length (A). The maximum extended length of the rod antenna element 20, which is indicated by the arrow “B” in the figure, may be 97 mm. The length of the round plug 30 may be 16.5 mm.
As shown in FIG. 3A and FIG. 3B, a foldable cell phone 50 includes a first housing member 51 and a second housing member 52 coupled with each other by a hinge mechanism (not shown) so that the cell phone 50 can be folded. The first housing member 51 includes a display section 511, such as a liquid crystal display, on the front side thereof and a built-in antenna 512 in the inside thereof. The second housing member 52 includes a key operation section 521 on the front side thereof and a built-in speaker 522 in the inside thereof.
As a measure against such matters, built-in antenna technologies and so on have been developed and such antennas have been mounted more and more. However, in some cases, the performance of the antenna can be deteriorated depending on the state of use. For example, as shown in FIG. 3A, the antenna shows good performance when the foldable cell phone 50 is used in an unfolded state. However, when the cell phone 50 is used in a folded state as shown in FIG. 3B, the built-in antenna 512 comes close to the ground GND of the set to cause a decrease in ground size. As a result, the characteristic (gain) of the built-in antenna 512 can be extensively deteriorated. For example, it decreases 10 dB or more. If the apparatus is used in hand, the built-in antenna can be hidden by the hand and the receiver sensitivity thereof can be decreased.
Part of the rotation mechanism section 40 to be connected to the connection part 24 of the rod antenna element 20 is formed on one end of the sleeve portion 303. Specifically, the central part of the one end side of the sleeve portion 303 is machined to form a notch-shaped housing portion 401 for housing a lock tip portion of the connection part 24, where lock notches are formed, to rotatably hold the connection part 24. In this case, the through hole 302 is formed passing through the sleeve portion 303 from the free end of the tip portion 304 to the bottom of the housing portion 401. Furthermore, the housing portion 401 is constructed of plate-shaped flanges 402 and 403 which are formed on two opposite edge portions to rotatably hold or pivotably support the lock tip portion. The rotation mechanism section 40 is formed so that the lock tip portion of the connection part 24 housed in and pivotably supported by the housing portion 401 is rotatable within a certain restricted range of angles in two opposite directions free of the flanges 402 and 403 of the housing portion 401. Pivotal support holes 402 a and 403 a are respectively formed in the flanges 402 and 403 to pivotably support the lock tip portion of the connection part 24 with a washer pin. In addition, the outer edge portions of the respective flanges 402 and 403 are formed in arc.
Alternatively, the machining may be performed after the steps of inserting the ball 306 and the spring 307 into the hole 302 and wedging them into the hole 302 by the pin 308.
Both the ball 306 and the spring 307 can be functioned as components of the rotation mechanism section 40.
FIG. 6A illustrates the configuration of the sleeve portion 303 in which the ball 306, the spring 307, and the spring-fixing pin 308 are arranged in place. FIG. 6B illustrates the connection between the sleeve portion 303 and the connection portion 24 of the retractable rod antenna 20 which can extend in the direction indicated by the arrow in the figure, where these components are rotatably fixed using the washer pin 404. As shown in FIG. 6C to FIG. 6E, the lock tip portion 241 is formed on the connection portion 24 of the rod antenna element 20 and capable of being housed in the housing portion 401 of the rotation mechanism section 40 formed on one end of the round plug 30. A plurality of notches 242 is formed in the arc-shaped edge of the lock tip portion 241 and arranged spaced at angular intervals corresponding to the predetermined rotation angles of the lock tip portion 241 to allow the ball 306 to fit into any of the notches 242. The pivotal support hole 241 a is formed in the lock tip portion 241 so that the lock tip portion 241 can be integrally, pivotally supported by the pivotal support holes 402 a and 403 a formed in the flanges 402 and 403 of the rotation mechanism section 40.
The lock tip portion 241 of the connection portion 24 as configured above is arranged in the housing portion 401 so that the pivotal support hole 241 a can face to the pivotal support holes 402 a and 403 a in the flanges 402 and 403 of the rotation mechanism section 40. Subsequently, the washer pin 404 is inserted into the pivotal support holes 402 a, 241 a, and 403 a and then fixed therein. Thus, the rod antenna element 20 is attached to the round plug 30, so that it can rotate around the lock tip portion 241. The ball 306 placed in the through hole 302 of the round plug 30 is pushed toward the lock tip portion 241 of the housing 401 by the resilience of the spring 307 and pushed against the notch 242. Therefore, the rod antenna device is provided with a plurality of locking portions where the rod antenna element 20 can be locked at one of the notches 242. Furthermore, such a locked state can be released by applying a force against the force of locking the ball 306 and the notch 242 and the antenna element 20 can be then allowed to freely rotate while allowing the ball 306 to be locked into another notch 242.
For forming the sleeve portion 311 of the round plug 30A, as shown in FIG. 9A, a cylindrical metal pipe 321 is prepared first. Then, a through hole 322 is concentrically formed along the central axis of the cylindrical metal pipe 321. As shown in FIG. 9B, for example, the profile of the metal pipe 321 is machined into a 3.5-mm round multipole plug (three poles). Part of the rotation mechanism section 40A to be connected to the connection part 24 of the rod antenna element 20 is formed on one end of the sleeve portion 311. Furthermore, the through hole 322 of the sleeve portion 311 has a large-sized region extending from the middle portion to the other end, which is provided as a resin-injection hole 322 a to inject resin into the through hole 322.
Specifically, the central part of the one end side of the sleeve portion 311 is machined to form a notch-shaped housing portion 411 in the rotation mechanism section 40A. The notch-shaped housing portion 411 is responsible for housing a lock tip portion 241 of the connection part 24, where lock notches are formed, to rotatably hold the connection part 24. In this case, the through hole 322 and the resin-injection hole 322 a are formed passing through the sleeve portion 311 from the end thereof to the bottom of the housing portion 411. Furthermore, the housing portion 411 is constructed of plate-shaped flanges 412 and 413 which are formed on two opposite edge portions to rotatably hold or pivotably support the lock tip portion 241. The rotation mechanism section 40A is formed so that the lock tip portion 241 of the connection part 24 housed in and pivotably supported by the housing portion 411 is rotatable within a certain restricted range of angles in two opposite directions free of the flanges 412 and 413 of the housing portion 411. As shown in FIG. 10A and FIG. 10B, pivotal support holes 412 a and 413 a are respectively formed in the flanges 412 and 413. These pivotal support holes 412 a and 413 a pivotally support the lock tip portion of the connection part 24 with a washer pin. In addition, the outer edge portions of the respective flanges 412 and 413 are formed in arc.
As shown in any of these figures, the ring portion 313 includes a cylindrical main body 3131 and an inserter 3132 with a diameter smaller than that of the main body 3131, where a through hole is opened from one end of the inserter 3132 to the underside of the main body 3131. In addition, the tip portion 312 includes a cylindrical main body 3121 and an inserter 3122 with a diameter smaller than that of the main body 3121, where a through hole is opened from one end of the inserter 3122 to the underside of the main body 3121. For example, the inserter 3122 of the tip portion 312 is inserted into the ring portion 313 from the main body 3131 and both the inserter 3122 of the tip portion 312 and the inserter 3132 of the ring portion 313 are inserted into the resin-injection hole 322 a from the other end of the sleeve portion 311. In this case, the assembled round multipole plug 30A is one shown in FIG. 10B and FIG. 12A. Subsequently, as shown in FIG. 12B, resin (e.g., POM) 330 is injected into the resin-injection hole 322 a and so on to form a round multipole plug 30A as shown in FIG. 11D.
As shown in FIG. 13C to FIG. 13E, the lock tip portion 241 is formed on the connection portion 24 of the rod antenna element 20 and capable of being housed in the housing portion 411 of the rotation mechanism section 40A formed on one end of the round plug 30A. A plurality of notches 242 is formed in the arc-shaped edge of the lock tip portion 241 and arranged spaced at angular intervals corresponding to the predetermined rotation angles of the lock tip portion 241 to allow the ball 323 to fit into any of the notches 242. The pivotal support hole 241 a is formed in the lock tip portion 241 so that the lock tip portion 241 can be integrally, pivotally supported by the pivotal support holes 412 a and 413 a formed in the flanges 412 and 413 of the rotation mechanism section 40A.
The lock tip portion 241 of the connection portion 24 as configured above is arranged in the housing portion 411 so that the pivotal support hole 241 a can face to the pivotal support holes 412 a and 413 a in the flanges 412 and 413 of the rotation mechanism section 40A. Subsequently, the washer pin 414 is inserted into the pivotal support holes 412 a, 241 a, and 413 a and then fixed therein. Thus, the rod antenna element 20 is attached to the round plug 30A, so that it can rotate around the lock tip portion 241. The ball 323 placed in the through hole 322 of the round plug 30A is pushed toward the lock tip portion 241 of the housing 411 by the resilience of the spring 324 and pushed against the notch 242. Therefore, the rod antenna device is provided with a plurality of locking portions where the rod antenna element 20 can be locked at one of the notches 242. Furthermore, such a locked state can be released by applying a force against the force of locking the ball 323 and the notch 242 and the rod antenna element 20 can be then allowed to freely rotate while allowing the ball 323 to be locked into another notch 242.
FIGS. 14A and 14B are diagrams illustrating an exemplary configuration of an antenna device as a third embodiment of the present invention. FIG. 14A and FIG. 14B represent different states of the antenna device, respectively.
FIG. 16A and FIG. 16B are diagrams illustrating the cell phone using the conversion adaptor with the antenna device according to the fourth embodiment. That is, FIG. 16A shows the main body of the closed cell phone and FIG. 16B shows the equivalent circuit of the cell phone. In this embodiment, for example, the set ground GND is 90×50 mm in assumed size. In addition, it is also set to become high impedance at the frequency band used.
FIG. 17 is a diagram illustrating the peak-gain performance of the antenna device according to the fourth embodiment when the antenna device is applied to the closed cell phone using the conversion adaptor. In FIG. 17, the upper panel is a characteristics chart in which the curved line “H” represents the characteristic of a horizontally-polarized wave and the curved line “V” represents the characteristic of a vertically-polarized wave. In addition to the characteristics chart, tables that represent the results of the measurements in detail are also shown in FIG. 17.
In the case of applying the antenna device of the first embodiment to the cell phone using the conversion adaptor, the state of null is partially observed. However, as shown in FIG. 17, it is found that there is substantially no effect on the gain at a frequency of approximately 520 MHz.
According to the present embodiment, as described above, the rod-shaped, removable antenna device 10 is provided for the conversion adaptor 60C with the standard round jack 61 to easily realize an ideal antenna device when the performance degradation of the antenna occurs.
The 13th pin 602-13 functions as an audio Lch pin.
In addition, a ferrite bead FB62 is arranged on the side of the wire LN2 facing to the 18th pin 602-18 of the plug.
In addition, a ferrite bead FB64 is arranged on the side of the wire LN4 facing to the 13th pin 602-13 of the plug.
In FIG. 25 and FIG. 26, the upper panel is a characteristics chart in which the curved line “H” represents the characteristic of a horizontally-polarized wave and the curved line “V” represents the characteristic of a vertically-polarized wave. In addition to the characteristics chart, tables that represent the results of the measurements in detail are also shown in FIG. 25 and FIG. 26.
However, as is evident from the comparison between FIG. 25 and FIG. 26, the antenna gain in FIG. 26 in which the capacitors C61 to C63 are mounted on the conversion adaptor are improved 2 to 3 dB at a low band frequency of 470 MHz and approximately 8 dB at a high band frequency of 870 MHz, compared with those of the antenna gain in FIG. 25.
Each of FIG. 27 and FIG. 28 is a diagram illustrating the peak-gain performance of the receiving system according to the sixth embodiment with respect to frequency. FIG. 27 illustrates the gain performance of the receiving system in the absence of capacitors C61 to C63 in the conversion adaptor. On the other hand, FIG. 28 illustrates the gain performance of the receiving system in the presence of capacitors C61 to C63 in the conversion adaptor. In FIG. 27 and FIG. 28, the upper panel is a characteristics chart in which the curved line “H” represents the characteristic of a horizontally-polarized wave and the curved line “V” represents the characteristic of a vertically-polarized wave.
However, as is evident from the comparison between FIG. 27 and FIG. 28, the antenna gain in FIG. 28 in which the capacitors C61 to C63 are mounted on the conversion adaptor are improved 2 to 3 dB at a low band frequency of 470 MHz and approximately 8 dB at a high band frequency of 870 MHz, compared with those of the antenna gain in FIG. 27.
That is, as shown in FIG. 29, the measurement points were located 3.9 km (Shinagawa), 5.7 Km (Togoshi), 9.5 km (Ikegami), 15 km (Kawasaki), 17 km (Mitsuike kouen), 18 km (Yokohama tsurumi), 25 km (Yokohama nishi-ku, Chuo), 28 km (Higashi-Tozuka), and 35 km (Totsuka) far from the power-transmitting point.
The antenna gain is improved approximately 2 to 8 dB when the capacitors are connected among the lines. In FIG. 30, furthermore, the curved line “A” represents the performance of the antenna at a received power of 512 MHz and the curved line “B” represents the performance of the antenna at a received power of 554 MHz.
If the receiver sensitivity of a tuner is −87 dBm, then the field intensity corresponds to 40 dBμV/m.
In FIG. 31, an area represented by “A” corresponds to a field intensity of 40 dBμV/m, an area represented by “B” corresponds to a field intensity of 45 dBμV/m, and an area represented by “C” corresponds to a field intensity of 50 dBμV/m.
The present application contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2009-083213 filed in the Japan Patent Office on Mar. 30, 2009, the entire content of which is hereby incorporated by reference.
a round plug having a rotation mechanism section on one end thereof, wherein said round plug is removably attached to a round audio jack arranged in an electronic apparatus, the round plug having a sleeve portion, a tip portion and a ring portion formed between the sleeve portion and the tip portion, wherein the sleeve portion comprises the rotation mechanism section and a cylindrical metal pipe machined into a 3.5 millimeter plug and to include a hole from the tip portion to a housing portion comprising two or more plate-shaped flanges of the rotation mechanism section; and
a rod antenna element and a connection portion having a lock tip portion, the lock tip portion including one or more notches formed on an arc-shaped edge of the lock tip portion,
wherein said rod antenna element is connected to said rotation mechanism section of said round plug via the connection portion and rotatable in a predetermined direction and in rotation angles determined by the one or more notches,
wherein the rotation mechanism section is arranged to house the lock tip portion of the connection portion in between the two or more plate-shaped flanges of the rotation mechanism section,
wherein said rod antenna element is rotatably extendable,
wherein the one or more notches comprise a plurality of notches,
wherein the plurality of notches are configured to receive a ball of the rotation mechanism section of said round plug,
wherein the ball is forced against the arc-shaped edge of the lock tip portion directly by a spring of the rotation mechanism section of said round plug,
wherein the spring is directed toward the rotation mechanism section of said round plug, and
wherein a first pivotal support hole is formed in the rod antenna element so that the rod antenna element can be integrally, pivotally supported by a second pivotal support hole of the rotation mechanism section.
said round plug is formed as a single-pole plug.
said round plug is formed as a multipole plug.
the one or more notches are arranged at angular intervals corresponding to the rotation angles determined by the one or more notches.
the rotation mechanism section comprises a locking mechanism comprising injected resin.
7. A conversion adaptor, comprising:
a round audio jack, to which a round plug of an antenna device is removably attached, the round plug comprising a cylindrical metal pipe machined into a 3.5 millimeter plug and to include a hole; and
a flat plug having a plurality of pins connected to respective pins of said round audio jack, which can be removably attached to a flat jack of an electronic apparatus as a connection target, wherein:
said round plug is configured to be removably inserted into said round audio jack, said round audio jack being disposed on a first surface of said conversion adaptor,
said round plug is configured to connect to a rod antenna element via a rotation mechanism of the round plug and a connection portion, the connection portion having a lock tip portion, the lock tip portion including one or more notches formed on an arc-shaped edge of the lock tip portion, the rod antenna element being rotatable in a predetermined direction and in rotation angles determined by the one or more notches,
the one or more notches comprise a plurality of notches,
the plurality of notches are configured to receive a ball of the rotation mechanism section of said round plug,
the ball is forced against the arc-shaped edge of the lock tip portion directly by a spring of the rotation mechanism section of said round plug,
the spring is directed toward the rotation mechanism section of said round plug,
a first pivotal support hole is formed in the rod antenna element so that the rod antenna element can be integrally, pivotally supported by a second pivotal support hole of the rotation mechanism section,
said flat plug, which is disposed on a second surface of said conversion adaptor, is configured to be removably inserted into said flat jack,
the second surface of the conversion adaptor is longer than the first surface of the conversion adaptor,
a capacitor is connected between said respective pins of said round audio jack, and
8. The conversion adaptor according to claim 7, wherein
wiring that connects said pins of said round audio jack to the corresponding pins of said flat plug is provided with a high-frequency cutoff section.
9. The conversion adaptor according to claim 8, wherein
said high-frequency cutoff section is arranged on the side of said flat plug.
10. The conversion adaptor according claim 9, wherein
said round audio jack is capable of transmitting a signal or electric power.
11. The conversion adaptor according to claim 10, wherein the round plug is a round multipole plug and said round multipole plug is removably attached to said round audio jack and is formed of an audio plug.
12. The conversion adaptor according to claim 7, wherein
the first surface of the conversion adaptor is substantially perpendicular to the second surface of the conversion adaptor.
an antenna device having a round plug, the round plug comprising a cylindrical metal pipe machined into a 3.5 millimeter plug and to include a hole;
a conversion adapter including a round audio jack to which said round plug of said antenna device is removably attached and a flat plug having a plurality of pins to be connected to respective pins of said round audio jack; and
an electronic apparatus having a function of receiving a broadcast wave and having a flat jack to which said flat plug of said conversion adapter is removably attached,
said round plug is configured to be removably inserted into said round audio jack, said round audio jack being disposed on a first surface of said conversion adapter,
said flat plug, which is disposed on a second surface of said conversion adapter, is configured to be removably inserted into said flat jack, and
the second surface of the conversion adapter is longer than the first surface of the conversion adapter, and
wherein said antenna device includes:
a rotation mechanism section arranged on one end of said round plug, and
wherein the spring is directed toward the rotation mechanism section of said round plug,
wherein a first pivotal support hole is formed in the rod antenna element so that the rod antenna element can be integrally, pivotally supported by a second pivotal support hole of the rotation mechanism section, and
14. The receiver according to claim 13, wherein
the first surface of the conversion adapter is substantially perpendicular to the second surface of the conversion adapter.
15. The receiver according to claim 13, wherein
said flat plug, which is disposed on a second surface of said conversion adapter, is configured to be removably inserted into said flat jack,
a rotation mechanism section arranged on one end of said round plug and
wherein said rod antenna element is connected to said rotation mechanism section of said round plug via the connection portion and rotatable in a predetermined direction and in rotation angles determined by the one or more notches, and
wherein a first pivotal support hole is formed in the rod antenna element so that the rod antenna element can be integrally, pivotally supported by a second pivotal support hole of the rotation mechanism section,
the rotation mechanism section comprises a locking mechanism comprising injected resin, and
wherein a capacitor is connected between at least one of transmission lines of said antenna device, said respective pins of said round audio jack of said conversion adapter, and pins of said jack of said electronic apparatus.
18. The receiver according to claim 16, wherein
US12729431 2009-03-30 2010-03-23 Antenna device, conversion adaptor, and receiver Active 2031-12-07 US9859605B2 (en)
JP2009-083213 2009-03-30
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MUKAI, KOICHI;YOSHINO, YOSHITAKA;KOMORI, CHISATO;AND OTHERS;REEL/FRAME:024122/0984