WO2015099006A1 - Earphone-equipped compact electronic device - Google Patents

Earphone-equipped compact electronic device Download PDF

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Publication number
WO2015099006A1
WO2015099006A1 PCT/JP2014/084235 JP2014084235W WO2015099006A1 WO 2015099006 A1 WO2015099006 A1 WO 2015099006A1 JP 2014084235 W JP2014084235 W JP 2014084235W WO 2015099006 A1 WO2015099006 A1 WO 2015099006A1
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WO
WIPO (PCT)
Prior art keywords
earphone
circuit
coil
electronic device
small electronic
Prior art date
Application number
PCT/JP2014/084235
Other languages
French (fr)
Japanese (ja)
Inventor
知行 樋口
明 新沼
Original Assignee
アルプス電気株式会社
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Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2015099006A1 publication Critical patent/WO2015099006A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • H04B5/26—
    • H04B5/72—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils

Definitions

  • the present invention relates to a small electronic device with an earphone, and particularly relates to a small electronic device with an earphone having excellent waterproofness.
  • FIG. 6 is an explanatory diagram showing the structure of the plug insertion part 204 of the small electronic device 201 according to Patent Document 1. As shown in FIG.
  • the small electronic device 201 includes a plug insertion portion 204 (earphone jack portion) into which the plug 203 of the earphone 202 is inserted.
  • a plug hole 205 is formed in the plug insertion portion 204, and a contact electrode (not shown) is disposed in the plug hole 205.
  • the plug 203 and the electronic circuit accommodated in the main body of the small electronic device 201 are electrically connected via the contact electrode.
  • a waterproof packing 206 is arranged around the plug hole 205.
  • the waterproof packing 206 has an elastic force in a direction in which the earphone 202 is pressed.
  • a hole for passing the plug 203 of the earphone 202 is formed at the center of the waterproof packing 206.
  • the portion of the waterproof packing 206 that is sandwiched between the plug 203 of the earphone 202 and the plug insertion portion 204 is elastically deformed along the insertion direction.
  • the adhesion between the earphone 202 and the plug insertion portion 204 is increased, thereby suppressing moisture from entering the inside of the main body through the plug hole 205. Yes.
  • the waterproofness of the plug insertion portion 204 is enhanced in this way.
  • the plug hole 205 is not completely closed, for example, the plug 203 of the earphone 202 is inserted into the plug hole 205 of the plug insertion part 204. If not, moisture will enter from the hole formed in the center of the waterproof packing 206. In addition, when the moisture becomes water vapor and enters the inside of the main body, sufficient waterproofness cannot be secured even if the plug 203 is inserted into the plug hole 205. Further, the waterproof packing 206 may deteriorate with time, and the waterproof function may be lowered.
  • moisture that has entered the inside of the small electronic device 201 affects the electronic circuit or oxidizes the surface of the contact electrode disposed in the plug hole 205 to connect the plug 203 to the electronic circuit. There was a possibility of affecting.
  • the present invention has been made in view of such a state of the art, and an object thereof is to provide a small electronic device with an earphone that is excellent in waterproofness.
  • a small electronic device with an earphone is a small electronic device with an earphone including a main body portion and an earphone attached to the main body portion, wherein the main body portion is An electronic circuit including a transmission circuit that generates an electrical signal corresponding to an audio signal, a transmission coil connected to the transmission circuit, a case for housing the electronic circuit and the transmission coil, and an outer wall of the case
  • the earphone accommodates a receiving coil capable of magnetic field coupling with the transmitting coil, a receiving circuit connected to the receiving coil, and the receiving coil and the receiving circuit.
  • an electric signal corresponding to an audio signal is transmitted from the main body to the earphone using magnetic coupling between the transmitting coil and the receiving coil. Need not be connected via a plug. Therefore, it is not necessary to provide a plug for connection on the earphone side, and it is not necessary to form a through hole for inserting the plug on the main body side. And compared with the case where the through-hole for plug insertion is formed in the main-body part, the airtightness by the side of a main-body part can be improved greatly. In addition, since it is not necessary to provide a contact electrode on the main body side, the surface of the contact electrode is not oxidized by moisture. As a result, the small electronic device with the earphone configured as described above becomes a small electronic device with the earphone having excellent waterproofness.
  • a magnet for holding the casing in the case is disposed in at least one of the attachment portion and the attachment portion.
  • a magnet for holding the casing in the case is disposed on at least one of the attachment portion and the attachment portion. Therefore, holding
  • the attachment portion includes a recess formed in an outer wall of the case, and the attached portion includes a protrusion that can be inserted into the recess.
  • the mounting portion includes a concave portion formed in the outer wall of the case, and the mounted portion includes a convex portion that can be inserted into the concave portion. Therefore, the lateral displacement of the housing portion can be prevented by inserting the convex portion of the attached portion into the concave portion of the attachment portion. As a result, it is possible to further easily hold the casing.
  • the main unit and the earphone have a built-in wireless communication device compatible with the short-range wireless communication standard, and the audio signal is transmitted using the wireless communication between the main unit and the earphone.
  • a method of transmitting the message from the main body to the earphone is also conceivable.
  • such a method requires a battery for power supply on the earphone side, which increases the size of the earphone and causes troublesome battery replacement on the earphone side.
  • the power for driving the receiving circuit is transmitted from the main unit to the earphone together with the electric signal corresponding to the audio signal by using magnetic coupling between the transmitting coil and the receiving coil. is doing. Therefore, it is not necessary to incorporate a power supply battery on the earphone side. As a result, the earphone can be easily downsized, and the troublesome battery replacement on the earphone side can be eliminated.
  • FIG. 10 It is explanatory drawing which shows the structure of the small electronic device 1 which concerns on 1st Embodiment of this invention. It is a block diagram which shows the circuit structure of the small electronic device 1 shown in FIG. It is explanatory drawing which shows typically the structure of the attaching part 15 and the to-be-attached part 24 shown in FIG. It is explanatory drawing which shows the structure of the small electronic device 101 which concerns on 2nd Embodiment of this invention. It is explanatory drawing which shows typically the structure of the attaching part 115 and the to-be-attached part 124 shown in FIG. 10 is an explanatory diagram showing a structure of a plug insertion unit 204 of a small electronic device 201 according to Patent Document 1.
  • FIG. 1 It is explanatory drawing which shows the structure of the small electronic device 1 which concerns on 1st Embodiment of this invention. It is a block diagram which shows the circuit structure of the small electronic device 1 shown in FIG. It is explanatory drawing which shows typically the structure of the attaching part
  • FIG. 1 is an explanatory diagram showing a configuration of a small electronic device 1 according to the first embodiment of the present invention.
  • FIG. 2 is a block diagram showing a circuit configuration of the small electronic device 1 shown in FIG.
  • FIG. 3 is an explanatory view schematically showing the structure of the attachment portion 15 and the attachment portion 24 shown in FIG.
  • the small electronic device 1 is a small electronic device with an earphone used as a portable music player, a portable TV, or the like. As shown in FIG. 1, the small electronic device 1 includes a main body 10 and an earphone 20 connected to the main body 10.
  • the main body 10 is formed in an electronic circuit 11 corresponding to various functions of the small electronic device 1, a transmission coil 13 for transmitting an audio signal, a case 14 for housing the electronic circuit 11 and the transmission coil 13, and the case 14. And an input means 16 such as a switch and a display means 17 such as a liquid crystal panel.
  • the electronic circuit 11 includes a transmission circuit 12 that transmits an electrical signal corresponding to the audio signal to the earphone 20.
  • the transmission circuit 12 includes a signal generation circuit 12a, a modulation circuit 12b, an amplification circuit 12c, and a control circuit 12d.
  • the signal generation circuit 12a generates an electrical signal that becomes a carrier wave.
  • the modulation circuit 12b modulates the electric signal generated by the signal generation circuit 12a to generate an electric signal corresponding to the audio signal.
  • the amplifier circuit 12c amplifies the electrical signal generated by the modulation circuit 12b.
  • the amplifier circuit 12 c is connected to the transmission coil 13, and the output signal of the amplifier circuit 12 c is transmitted to the transmission coil 13.
  • the control circuit 12d controls the modulation circuit 12b.
  • the transmission coil 13 includes a core 13a, a bobbin 13b covering the periphery of the core 13a, and a coil wire 13c wound around the bobbin 13b.
  • the core 13a is a columnar magnet.
  • the transmission coil 13 generates a magnetic field corresponding to the output signal of the amplifier circuit 12c. And the electric signal corresponding to an audio
  • the case 14 is a substantially rectangular parallelepiped member made of a material such as synthetic resin.
  • the case 14 accommodates the electronic circuit 11 and the transmission coil 13, covers the periphery of the electronic circuit 11, and enhances the waterproofness of the electronic circuit 11.
  • a mounting portion 15 for mounting the earphone 20 is formed on the outer wall 14 a of the case 14.
  • a predetermined region on the right side surface of the case 14 serves as the attachment portion 15.
  • the transmission coil 13 is disposed at a position corresponding to the attachment portion 15 of the inner wall 14 b of the case 14.
  • the input means 16 and the display means 17 are disposed on the front surface of the case 14.
  • the input unit 16 receives an input operation from the user.
  • the display means 17 displays various information and videos.
  • the main body 10 has a built-in battery, and the built-in battery supplies power to various electronic circuits of the main body 10.
  • the input means 16 and the display means 17 are waterproofed, detailed description of the waterproofing method is omitted.
  • the earphone 20 is formed in the receiving coil 21 for receiving an audio signal, a receiving circuit 22 connected to the receiving coil 21, a housing part 23 for housing the receiving coil 21 and the receiving circuit 22, and the housing part 23.
  • the attached portion 24, the sound generating portion 25, and the lead wire 26 are provided.
  • the receiving coil 21 includes a core 21a, a bobbin 21b covering the periphery of the core 21a, and a conductive wire 21c wound around the bobbin 21b.
  • the core 21a is a columnar member made of a magnetic metal such as iron.
  • the reception coil 21 is a coil for magnetically coupling with the transmission coil 13. In this embodiment, the electric signal transmitted from the transmission coil 13 is received using the magnetic coupling between the transmission coil 13 and the reception coil 21.
  • the reception circuit 22 includes a demodulation circuit 22a, a rectification circuit 22b, and a constant voltage circuit 22c.
  • the demodulation circuit 22a is connected to the reception coil 21, and a part of the electrical signal received by the reception coil 21 is transmitted to the demodulation circuit 22a. Then, the demodulation circuit 22 a detects an audio signal from the modulation component of the electric signal transmitted from the receiving coil 21.
  • the rectifier circuit 22b is also connected to the receiving coil 21, and part of the electrical signal received by the receiving coil 21 is also transmitted to the rectifying circuit 22b.
  • the rectifier circuit 22b rectifies the electrical signal transmitted from the receiving coil 21, and extracts power for driving the demodulator circuit 22a.
  • the constant voltage circuit 22c converts the output voltage of the rectifier circuit 22b into a predetermined voltage. The output voltage of the constant voltage circuit 22c is used as a power source for the demodulation circuit 22a.
  • the casing 23 is a columnar member made of a material such as synthetic resin.
  • the casing unit 23 accommodates the reception coil 21 and the reception circuit 22.
  • An attached portion 24 to be attached to the main body portion 10 is formed on the outer wall 23 a of the housing portion 23.
  • the left side of the housing portion 23 is a planar portion that comes into contact with the attachment portion 15 of the case 14, and in this embodiment, this portion is the attachment portion 24.
  • the receiving coil 21 is disposed at a position corresponding to the attached portion 24 of the inner wall 23 b of the housing portion 23.
  • the transmission coil 13 and the reception coil 21 come close to each other when the attachment portion 15 of the case 14 and the attached portion 24 of the housing portion 23 come into contact with each other, and the core 13a of the transmission coil 13 And the core 21a of the receiving coil 21 are attracted by magnetic force. And the housing
  • the transmission coil 13 and the reception coil 21 are close to each other, the magnetic coupling between the transmission coil 13 and the reception coil 21 becomes possible. Then, an electric signal corresponding to the audio signal is transmitted from the transmission coil 13 to the reception coil 21 using magnetic field coupling between the transmission coil 13 and the reception coil 21. As described above, in the small electronic device 1, the electric signal corresponding to the audio signal is transmitted from the main body unit 10 to the earphone 20 by using the magnetic field coupling between the transmission coil 13 and the reception coil 21.
  • the sound generator 25 generates sound corresponding to the sound signal detected by the receiving circuit 22.
  • the lead wire 26 connects the receiving circuit 22 and the sound generator 25.
  • the housing part 23, the sound generation part 25, and the lead wire 26 are waterproofed, the detailed description about the waterproofing method is abbreviate
  • the effect of this embodiment will be described.
  • the earphone 20 is a normal plug-type earphone and a through hole for plug insertion is formed in the main body 10
  • some measures for waterproofing are taken.
  • the contact electrode disposed in the through hole is oxidized by the invading moisture.
  • the electric signal corresponding to the audio signal is transmitted from the main body unit 10 to the earphone 20 using the magnetic field coupling between the transmission coil 13 and the reception coil 21.
  • the electronic circuit 11 on the side and the earphone 20 via a plug There is no need to connect the electronic circuit 11 on the side and the earphone 20 via a plug. Therefore, it is not necessary to provide a plug for connection on the earphone 20 side, and it is not necessary to form a through hole for inserting the plug on the main body 10 side. And compared with the case where the through-hole for plug insertion is formed in the main-body part 10, the airtightness by the side of the main-body part 10 can be improved greatly. Further, since it is not necessary to provide a contact electrode on the main body 10 side, the contact electrode is not oxidized by moisture. As a result, the small electronic device 1 becomes a small electronic device with earphones having excellent waterproof properties.
  • the transmission coil 13 is disposed at a position corresponding to the attachment portion 15 of the inner wall 14b of the case 14.
  • the core 13 a of the transmission coil 13 serves as a magnet for holding the casing 23 in the case 14.
  • the housing 23 can be easily held by holding the housing 23 using the magnetic force of the core 13a.
  • the positioning of the housing part 23 and the mounting part 15 can be facilitated.
  • the main body 10 and the earphone 20 have a built-in wireless communication device that supports short-range wireless communication standards, and the main body 10
  • a method of transmitting an audio signal from the main body unit to the earphone by using wireless communication with the earphone 20 is also conceivable.
  • a battery for power supply is required on the earphone 20 side, and the earphone 20 is increased in size, and troublesome battery replacement occurs on the earphone 20 side.
  • the electric power for driving the demodulation circuit is supplied from the main body unit 10 together with the electrical signal corresponding to the audio signal by using the magnetic coupling between the transmission coil 13 and the reception coil 21. It is transmitted to the earphone 20. Therefore, the earphone 20 does not need to incorporate a power supply battery. As a result, the earphone 20 can be easily downsized, and the troublesome battery replacement on the earphone 20 side can be eliminated.
  • FIG. 4 is an explanatory diagram showing the configuration of the small electronic device 101 according to the second embodiment of the present invention.
  • FIG. 5 is an explanatory view schematically showing the structure of the attaching portion 115 and the attached portion 124 shown in FIG.
  • the small electronic device 101 includes a main body 10 and an earphone 20 as shown in FIG.
  • the main body 10 includes an electronic circuit 11 including a transmission circuit 12, a transmission coil 13 for transmitting an audio signal, a case 14 that houses the electronic circuit 11 and the transmission coil 13, and an attachment 115 formed on the case 14. , Input means 16 and display means 17.
  • a cylindrical recess 115a is formed at a predetermined position of the outer wall 14a on the right side surface of the case 14, and in this embodiment, the recess 115a of the outer wall 14a of the case 14 is formed.
  • the part to include is the attachment portion 115.
  • the transmission coil 13 is disposed at a position corresponding to the concave portion 115 a of the inner wall 14 b of the case 14.
  • the earphone 20 is formed in the receiving coil 21 for receiving an audio signal, a receiving circuit 22 connected to the receiving coil 21, a housing part 23 for housing the receiving coil 21 and the receiving circuit 22, and the housing part 23.
  • the attached portion 124, the sound generation unit 25, and the lead wire 26 are provided.
  • the outer wall 23 a of the housing portion 23 is formed with a columnar convex portion 124 a that can be inserted into the recessed portion 115 a of the mounting portion 115.
  • the housing portion A portion including the convex portion 124 a of the outer wall 23 a of the 23 is an attached portion 124.
  • the receiving coil 21 is disposed at a position corresponding to the attached portion 124 of the inner wall 23 b of the housing portion 23.
  • the core 21a of the receiving coil 21 extends to the vicinity of the tip of the convex portion 124a.
  • the convex portion 124a of the attachment portion 124 is inserted into the concave portion 115a of the attachment portion 115, and the core 13a of the transmission coil 13 and the core 21a of the reception coil 21 are attracted by a magnetic force, thereby The body part 23 is held by the case 14.
  • a cylindrical recess 115 a is formed in the outer wall 14 a of the case 14, and a portion including the recess 115 a of the outer wall 14 a of the case 14 is an attachment portion 115.
  • the housing portion 23 is formed with a convex portion 124 a that can be inserted into the concave portion 115 a of the attachment portion 115, and a portion including the convex portion 124 a of the housing portion 23 is the attached portion 124.
  • the small electronic device 1 and the small electronic device 101 may be electronic devices other than a portable music player or a portable TV.
  • the small electronic device 1 and the small electronic device 101 may be electronic devices such as a portable information terminal and a portable game machine.
  • the small electronic device 1 and the small electronic device 101 may include electronic circuits and equipment other than those described above in accordance with the function of the electronic device.
  • the circuit configuration of the transmission circuit 12 and the circuit configuration of the reception circuit 22 may be circuit configurations other than those described above.
  • the modulation added to the electric signal transmitted from the main body unit 10 to the earphone 20 may be AM modulation or digital modulation instead of FM modulation.
  • the main body 10 may include a magnetic field detection unit that detects a change in the magnetic field near the transmission coil 13. Then, it is determined whether or not the earphone 20 is attached based on the change in the magnetic field. If the earphone is not attached, the functions of the signal generation circuit 12a and the amplification circuit 12c may be stopped. By stopping the functions of the signal generation circuit 12a and the amplification circuit 12c when the earphone is not attached, wasteful power consumption can be suppressed.
  • the core 13a of the transmission coil 13 is a magnet and the core 21a of the reception coil 21 is a magnetic metal.
  • the core 13a of the transmission coil 13 is a magnetic metal
  • the reception coil The 21 cores 21a may be magnets.
  • both the core 13a of the transmission coil 13 and the core 21a of the reception coil 21 may be magnets.
  • the transmission coil 13 and the reception coil 21 may be coils having a structure other than those described above. Moreover, you may hold

Abstract

[Problem] To provide an earphone-equipped compact electronic device having excellent waterproofness. [Solution] An earphone-equipped electronic device (1) is provided with a body part (10) and an earphone (20), and is characterized in that the body part (10) comprises an electronic circuit (11) including a transmission circuit (12), a transmission coil (13) connected with the transmission circuit (12), a case (14) housing the electronic circuit (11) and the transmission coil (13), and a mounting section (15) formed on the outer wall of the case (14), the earphone (20) comprises a reception coil (21) capable of magnetic field coupling to the transmission coil (13), a reception circuit (22) connected to the reception coil (21), a housing section (23) housing the reception coil (21) and the reception circuit (22), and a mounted section (24) formed on the outer wall of the housing section (23), and an electric signal is transmitted from the body part (10) to the earphone (20) using the magnetic field coupling between the transmission coil (13) and the reception coil (21).

Description

イヤホン付き小型電子機器Small electronic devices with earphones
　本発明は、イヤホン付き小型電子機器に関し、特に、防水性の優れたイヤホン付き小型電子機器に関する。 The present invention relates to a small electronic device with an earphone, and particularly relates to a small electronic device with an earphone having excellent waterproofness.
　近年、携帯音楽プレーヤや携帯ＴＶ等のイヤホン付き小型電子機器を浴室等で使用する機会が増加しており、それに伴って、これらの小型電子機器により高い防水性が求められるようになってきている。小型電子機器の防水性に関しては、本体部にプラグ挿入用の貫通孔等を形成する必要のある、イヤホンジャック部のような部分の防水性の確保が特に重要となる。 In recent years, opportunities to use small electronic devices with earphones such as portable music players and portable TVs in bathrooms and the like are increasing, and accordingly, these small electronic devices are required to have high waterproof properties. . With regard to the waterproof property of a small electronic device, it is particularly important to ensure the waterproof property of a part such as an earphone jack part that requires a through hole for plug insertion or the like in the main body part.
　イヤホンジャック部の防水性を高める技術に関しては、特許文献１に係る小型電子機器等が開示されている。図６は、特許文献１に係る小型電子機器２０１のプラグ差込部２０４の構造を示す説明図である。 Regarding the technology for improving the waterproofness of the earphone jack part, a small electronic device or the like according to Patent Document 1 is disclosed. FIG. 6 is an explanatory diagram showing the structure of the plug insertion part 204 of the small electronic device 201 according to Patent Document 1. As shown in FIG.
　図６に示すように、小型電子機器２０１は、イヤホン２０２のプラグ２０３を挿入するプラグ差込部２０４（イヤホンジャック部）を備えている。プラグ差込部２０４には、プラグ孔２０５が形成されており、プラグ孔２０５には、図示しない接点用の電極が配設されている。そして、プラグ２０３がプラグ孔２０５に挿入されると、接点用の電極を介して、プラグ２０３と小型電子機器２０１の本体に収容された電子回路とが電気的に接続されるようになっている。プラグ孔２０５の周囲には、防水パッキン２０６が配置されている。防水パッキン２０６は、イヤホン２０２を押圧する方向に弾性力を有している。また、防水パッキン２０６の中心部には、イヤホン２０２のプラグ２０３を通すための穴が形成されている。 As shown in FIG. 6, the small electronic device 201 includes a plug insertion portion 204 (earphone jack portion) into which the plug 203 of the earphone 202 is inserted. A plug hole 205 is formed in the plug insertion portion 204, and a contact electrode (not shown) is disposed in the plug hole 205. When the plug 203 is inserted into the plug hole 205, the plug 203 and the electronic circuit accommodated in the main body of the small electronic device 201 are electrically connected via the contact electrode. . A waterproof packing 206 is arranged around the plug hole 205. The waterproof packing 206 has an elastic force in a direction in which the earphone 202 is pressed. In addition, a hole for passing the plug 203 of the earphone 202 is formed at the center of the waterproof packing 206.
　プラグ２０３がプラグ孔２０５に挿入されると、防水パッキン２０６のうち、イヤホン２０２のプラグ２０３とプラグ差込部２０４に挟まれる部分が、挿入方向に沿って弾性変形する。そして、防水パッキン２０６の弾性変形に伴って、イヤホン２０２とプラグ差込部２０４との間の密着性が高まり、それによって、水分がプラグ孔２０５を通って本体内部へ浸入するのを抑制している。小型電子機器２０１では、このようにして、プラグ差込部２０４の防水性を高めている。 When the plug 203 is inserted into the plug hole 205, the portion of the waterproof packing 206 that is sandwiched between the plug 203 of the earphone 202 and the plug insertion portion 204 is elastically deformed along the insertion direction. As the waterproof packing 206 is elastically deformed, the adhesion between the earphone 202 and the plug insertion portion 204 is increased, thereby suppressing moisture from entering the inside of the main body through the plug hole 205. Yes. In the small electronic device 201, the waterproofness of the plug insertion portion 204 is enhanced in this way.
特開２００４－１１９２８４号公報JP 2004-119284 A
　しかしながら、特許文献１に係る小型電子機器２０１では、プラグ孔２０５が完全に塞がれている訳ではないので、例えば、イヤホン２０２のプラグ２０３がプラグ差込部２０４のプラグ孔２０５に挿入されていない場合には、防水パッキン２０６の中心部に形成された穴から水分が浸入してしまう。また、水分が水蒸気となって本体内部に浸入する場合には、プラグ２０３がプラグ孔２０５に挿入されていても十分な防水性を確保できなかった。また、防水パッキン２０６が経時劣化して、防水機能が低下する可能性もあった。 However, in the small electronic device 201 according to Patent Document 1, since the plug hole 205 is not completely closed, for example, the plug 203 of the earphone 202 is inserted into the plug hole 205 of the plug insertion part 204. If not, moisture will enter from the hole formed in the center of the waterproof packing 206. In addition, when the moisture becomes water vapor and enters the inside of the main body, sufficient waterproofness cannot be secured even if the plug 203 is inserted into the plug hole 205. Further, the waterproof packing 206 may deteriorate with time, and the waterproof function may be lowered.
　そして、小型電子機器２０１の内部に侵入した水分が、電子回路に影響を及ぼしたり、プラグ孔２０５に配設された接点用の電極の表面を酸化させて、プラグ２０３と電子回路との接続に影響を及ぼしたりする可能性があった。 Then, moisture that has entered the inside of the small electronic device 201 affects the electronic circuit or oxidizes the surface of the contact electrode disposed in the plug hole 205 to connect the plug 203 to the electronic circuit. There was a possibility of affecting.
　本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、防水性の優れたイヤホン付き小型電子機器を提供することにある。 The present invention has been made in view of such a state of the art, and an object thereof is to provide a small electronic device with an earphone that is excellent in waterproofness.
　この課題を解決するために、請求項１に記載のイヤホン付き小型電子機器は、本体部と、前記本体部に取り付けられるイヤホンと、を備えたイヤホン付き小型電子機器であって、前記本体部は、音声信号に対応した電気信号を生成する送信回路を含む電子回路と、前記送信回路と接続された送信コイルと、前記電子回路と前記送信コイルとを収容するケースと、前記ケースの外壁に形成された取り付け部と、を有し、前記イヤホンは、前記送信コイルとの磁界結合が可能な受信コイルと、前記受信コイルに接続された受信回路と、前記受信コイルと前記受信回路とを収容する筐体部と、前記筐体部の外壁に形成された被取り付け部と、を有し、前記送信コイルは、前記ケースの内壁の前記取り付け部と対応する位置に配設され、前記受信コイルは、前記筐体部の内壁の前記被取り付け部と対応する位置に配設され、前記送信コイルと前記受信コイルとの磁界結合を利用して、前記電気信号を前記本体部から前記イヤホンに伝送することを特徴とする。 In order to solve this problem, a small electronic device with an earphone according to claim 1 is a small electronic device with an earphone including a main body portion and an earphone attached to the main body portion, wherein the main body portion is An electronic circuit including a transmission circuit that generates an electrical signal corresponding to an audio signal, a transmission coil connected to the transmission circuit, a case for housing the electronic circuit and the transmission coil, and an outer wall of the case The earphone accommodates a receiving coil capable of magnetic field coupling with the transmitting coil, a receiving circuit connected to the receiving coil, and the receiving coil and the receiving circuit. A housing portion and a mounted portion formed on the outer wall of the housing portion, and the transmission coil is disposed at a position corresponding to the mounting portion of the inner wall of the case, and Is disposed at a position corresponding to the attached portion of the inner wall of the housing portion, and the electric signal is transmitted from the main body portion to the earphone using magnetic coupling between the transmission coil and the reception coil. It is characterized by transmitting.
　この構成のイヤホン付き小型電子機器では、送信コイルと受信コイルとの磁界結合を利用して、音声信号に対応した電気信号を本体部からイヤホンに伝送するので、本体部側の電子回路とイヤホンとを、プラグを介して接続させる必要が無くなる。そのため、イヤホン側では接続用のプラグを備える必要が無くなり、本体部側ではプラグを挿入するための貫通孔を形成する必要が無くなる。そして、本体部にプラグ挿入用の貫通孔が形成されている場合と比較して、本体部側の気密性を飛躍的に高めることができる。また、本体部側に接点用の電極を配設する必要も無いので、接点用の電極の表面が水分によって酸化することも無くなる。その結果、この構成のイヤホン付き小型電子機器は、防水性の優れたイヤホン付き小型電子機器となる。 In a small electronic device with an earphone of this configuration, an electric signal corresponding to an audio signal is transmitted from the main body to the earphone using magnetic coupling between the transmitting coil and the receiving coil. Need not be connected via a plug. Therefore, it is not necessary to provide a plug for connection on the earphone side, and it is not necessary to form a through hole for inserting the plug on the main body side. And compared with the case where the through-hole for plug insertion is formed in the main-body part, the airtightness by the side of a main-body part can be improved greatly. In addition, since it is not necessary to provide a contact electrode on the main body side, the surface of the contact electrode is not oxidized by moisture. As a result, the small electronic device with the earphone configured as described above becomes a small electronic device with the earphone having excellent waterproofness.
　請求項２に記載のイヤホン付き小型電子機器では、前記取り付け部と前記被取り付け部との少なくとも一方には、前記筐体部を前記ケースに保持するための磁石が配設されていることを特徴とする。 In the small electronic device with an earphone according to claim 2, a magnet for holding the casing in the case is disposed in at least one of the attachment portion and the attachment portion. And
　この構成のイヤホン付き小型電子機器では、取り付け部と被取り付け部との少なくとも一方には、筐体部をケースに保持するための磁石が配設されている。そのため、磁石の磁力を利用して筐体部を保持することによって、筐体部の保持を容易にすることができる。また、磁石の磁力を利用して筐体部と取り付け部との位置決めを行うことによって、筐体部と取り付け部との位置決めを容易にすることもできる。 In the small electronic device with the earphone configured as described above, a magnet for holding the casing in the case is disposed on at least one of the attachment portion and the attachment portion. Therefore, holding | maintenance of a housing | casing part can be made easy by hold | maintaining a housing | casing part using the magnetic force of a magnet. Further, by positioning the housing part and the attachment part using the magnetic force of the magnet, the positioning of the housing part and the attachment part can be facilitated.
　請求項３に記載のイヤホン付き小型電子機器では、前記取り付け部は、前記ケースの外壁に形成された凹部を含み、前記被取り付け部は、前記凹部に挿入可能な凸部を含んでいることを特徴とする。 In the small electronic device with an earphone according to claim 3, the attachment portion includes a recess formed in an outer wall of the case, and the attached portion includes a protrusion that can be inserted into the recess. Features.
　この構成のイヤホン付き小型電子機器では、取り付け部は、ケースの外壁に形成された凹部を含み、被取り付け部は、凹部に挿入可能な凸部を含んでいる。そのため、被取り付け部の凸部が取り付け部の凹部に挿入されることによって、筐体部の横ずれを防止することができる。その結果、筐体部の保持を更に容易にすることができる。 In the small electronic device with the earphone configured as described above, the mounting portion includes a concave portion formed in the outer wall of the case, and the mounted portion includes a convex portion that can be inserted into the concave portion. Therefore, the lateral displacement of the housing portion can be prevented by inserting the convex portion of the attached portion into the concave portion of the attachment portion. As a result, it is possible to further easily hold the casing.
　請求項４に記載のイヤホン付き小型電子機器では、前記送信コイルと前記受信コイルとの磁界結合を利用して、前記電気信号と共に前記受信回路を駆動するための電力を、前記本体部から前記イヤホンに送信することを特徴とする。 5. The small electronic device with an earphone according to claim 4, wherein electric power for driving the receiving circuit together with the electric signal is transmitted from the main body portion to the earphone by utilizing magnetic coupling between the transmitting coil and the receiving coil. It is characterized by transmitting to.
　小型電子機器の防水性を改善する方法としては、例えば、本体部とイヤホンとが近距離無線通信規格に対応した無線通信装置を内蔵し、本体部とイヤホンとの無線通信を利用して音声信号を本体部からイヤホンに送信する方法も考えられる。しかしながら、このような方法では、イヤホン側に電力供給用の電池が必要となり、イヤホンが大型化すると共に、イヤホン側で電池交換の煩わしさが生じる。 As a method for improving the waterproofness of a small electronic device, for example, the main unit and the earphone have a built-in wireless communication device compatible with the short-range wireless communication standard, and the audio signal is transmitted using the wireless communication between the main unit and the earphone. A method of transmitting the message from the main body to the earphone is also conceivable. However, such a method requires a battery for power supply on the earphone side, which increases the size of the earphone and causes troublesome battery replacement on the earphone side.
　一方、この構成のイヤホン付き小型電子機器では、送信コイルと受信コイルとの磁界結合を利用して、音声信号に対応した電気信号と共に受信回路を駆動するための電力を、本体部からイヤホンに伝送している。そのため、イヤホン側では電力供給用の電池を内蔵しなくても良い。その結果、イヤホンを小型化し易くなり、また、イヤホン側での電池交換の煩わしさを解消することができる。 On the other hand, in a small electronic device with an earphone of this configuration, the power for driving the receiving circuit is transmitted from the main unit to the earphone together with the electric signal corresponding to the audio signal by using magnetic coupling between the transmitting coil and the receiving coil. is doing. Therefore, it is not necessary to incorporate a power supply battery on the earphone side. As a result, the earphone can be easily downsized, and the troublesome battery replacement on the earphone side can be eliminated.
　本発明によれば、防水性の優れたイヤホン付き小型電子機器を提供することができる。 According to the present invention, it is possible to provide a small electronic device with earphones having excellent waterproof properties.
本発明の第１実施形態に係る小型電子機器１の構成を示す説明図である。It is explanatory drawing which shows the structure of the small electronic device 1 which concerns on 1st Embodiment of this invention. 図１に示す小型電子機器１の回路構成を示すブロック図である。It is a block diagram which shows the circuit structure of the small electronic device 1 shown in FIG. 図１に示す取り付け部１５と被取り付け部２４との構造を模式的に示す説明図である。It is explanatory drawing which shows typically the structure of the attaching part 15 and the to-be-attached part 24 shown in FIG. 本発明の第２実施形態に係る小型電子機器１０１の構成を示す説明図である。It is explanatory drawing which shows the structure of the small electronic device 101 which concerns on 2nd Embodiment of this invention. 図４に示す取り付け部１１５と被取り付け部１２４との構造を模式的に示す説明図である。It is explanatory drawing which shows typically the structure of the attaching part 115 and the to-be-attached part 124 shown in FIG. 特許文献１に係る小型電子機器２０１のプラグ差込部２０４の構造を示す説明図である。10 is an explanatory diagram showing a structure of a plug insertion unit 204 of a small electronic device 201 according to Patent Document 1. FIG.
　［第１実施形態］
　以下、本考案の第１実施形態について図面を参照しながら説明する。尚、各図において、Ｘ１方向を左方向、Ｘ２方向を右方向、Ｙ１方向を前方、Ｙ２方向を後方、Ｚ１方向を上方、Ｚ２方向を下方として、説明を進める。 [First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In each drawing, the description will be made with the X1 direction as the left direction, the X2 direction as the right direction, the Y1 direction as the front, the Y2 direction as the rear, the Z1 direction as the upper side, and the Z2 direction as the lower side.
　次に、本実施形態に係る小型電子機器１の構成について、図１ないし図３を用いて説明する。図１は、本発明の第１実施形態に係る小型電子機器１の構成を示す説明図である。図２は、図１に示す小型電子機器１の回路構成を示すブロック図である。図３は、図１に示す取り付け部１５と被取り付け部２４との構造を模式的に示す説明図である。 Next, the configuration of the small electronic device 1 according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is an explanatory diagram showing a configuration of a small electronic device 1 according to the first embodiment of the present invention. FIG. 2 is a block diagram showing a circuit configuration of the small electronic device 1 shown in FIG. FIG. 3 is an explanatory view schematically showing the structure of the attachment portion 15 and the attachment portion 24 shown in FIG.
　小型電子機器１は、携帯音楽プレーヤや携帯ＴＶ等として使用されるイヤホン付き小型電子機器である。小型電子機器１は、図１に示すように、本体部１０と、本体部１０と接続されるイヤホン２０と、を備えている。 The small electronic device 1 is a small electronic device with an earphone used as a portable music player, a portable TV, or the like. As shown in FIG. 1, the small electronic device 1 includes a main body 10 and an earphone 20 connected to the main body 10.
　本体部１０は、小型電子機器１の各種の機能に対応した電子回路１１と、音声信号送信用の送信コイル１３と、電子回路１１と送信コイル１３とを収容するケース１４と、ケース１４に形成された取り付け部１５と、スイッチ等の入力手段１６と、液晶パネル等の表示手段１７と、を有している。 The main body 10 is formed in an electronic circuit 11 corresponding to various functions of the small electronic device 1, a transmission coil 13 for transmitting an audio signal, a case 14 for housing the electronic circuit 11 and the transmission coil 13, and the case 14. And an input means 16 such as a switch and a display means 17 such as a liquid crystal panel.
　電子回路１１には、音声信号に対応した電気信号をイヤホン２０に送信する送信回路１２が含まれる。送信回路１２は、図２に示すように、信号発生回路１２ａと変調回路１２ｂと増幅回路１２ｃと制御回路１２ｄとを有している。信号発生回路１２ａは、搬送波となる電気信号を生成している。変調回路１２ｂは、信号発生回路１２ａが生成した電気信号に変調を加えて、音声信号に対応した電気信号を生成している。増幅回路１２ｃは、変調回路１２ｂが生成した電気信号を増幅している。増幅回路１２ｃは、送信コイル１３と接続されており、増幅回路１２ｃの出力信号が送信コイル１３に伝送される。制御回路１２ｄは、変調回路１２ｂを制御している。 The electronic circuit 11 includes a transmission circuit 12 that transmits an electrical signal corresponding to the audio signal to the earphone 20. As shown in FIG. 2, the transmission circuit 12 includes a signal generation circuit 12a, a modulation circuit 12b, an amplification circuit 12c, and a control circuit 12d. The signal generation circuit 12a generates an electrical signal that becomes a carrier wave. The modulation circuit 12b modulates the electric signal generated by the signal generation circuit 12a to generate an electric signal corresponding to the audio signal. The amplifier circuit 12c amplifies the electrical signal generated by the modulation circuit 12b. The amplifier circuit 12 c is connected to the transmission coil 13, and the output signal of the amplifier circuit 12 c is transmitted to the transmission coil 13. The control circuit 12d controls the modulation circuit 12b.
　送信コイル１３は、図３に示すように、コア１３ａと、コア１３ａの周囲を覆うボビン１３ｂと、ボビン１３ｂの周囲に巻き回されたコイル用の導線１３ｃと、で構成される。コア１３ａは、円柱状の磁石である。送信コイル１３は、増幅回路１２ｃの出力信号に対応した磁界を発生させている。そして、送信コイル１３が発生させた磁界を利用して、音声信号に対応した電気信号をイヤホン２０に送信している。 As shown in FIG. 3, the transmission coil 13 includes a core 13a, a bobbin 13b covering the periphery of the core 13a, and a coil wire 13c wound around the bobbin 13b. The core 13a is a columnar magnet. The transmission coil 13 generates a magnetic field corresponding to the output signal of the amplifier circuit 12c. And the electric signal corresponding to an audio | voice signal is transmitted to the earphone 20 using the magnetic field which the transmission coil 13 generated.
　ケース１４は、合成樹脂等の材質でできた略直方体の部材である。ケース１４は、電子回路１１と送信コイル１３とを収容すると共に、電子回路１１の周囲を覆い、電子回路１１の防水性を高めている。ケース１４の外壁１４ａには、イヤホン２０を取り付けるための取り付け部１５が形成されている。本実施形態では、図１及び図３に示すように、ケース１４の右側面の所定の領域が取り付け部１５となっている。また、図３に示すように、ケース１４の内壁１４ｂの取り付け部１５と対応する位置には、送信コイル１３が配設されている。 The case 14 is a substantially rectangular parallelepiped member made of a material such as synthetic resin. The case 14 accommodates the electronic circuit 11 and the transmission coil 13, covers the periphery of the electronic circuit 11, and enhances the waterproofness of the electronic circuit 11. A mounting portion 15 for mounting the earphone 20 is formed on the outer wall 14 a of the case 14. In this embodiment, as shown in FIGS. 1 and 3, a predetermined region on the right side surface of the case 14 serves as the attachment portion 15. As shown in FIG. 3, the transmission coil 13 is disposed at a position corresponding to the attachment portion 15 of the inner wall 14 b of the case 14.
　入力手段１６と表示手段１７とは、ケース１４の前面に配設されている。入力手段１６は、ユーザからの入力操作を受け付けている。表示手段１７は、各種の情報や映像を表示している。また、図示しないが、本体部１０には電池が内蔵されており、内蔵された電池が本体部１０の各種の電子回路に電力を供給している。尚、入力手段１６と表示手段１７とには防水加工が施されているが、その防水加工方法についての詳細な説明は省略する。 The input means 16 and the display means 17 are disposed on the front surface of the case 14. The input unit 16 receives an input operation from the user. The display means 17 displays various information and videos. Although not shown, the main body 10 has a built-in battery, and the built-in battery supplies power to various electronic circuits of the main body 10. Although the input means 16 and the display means 17 are waterproofed, detailed description of the waterproofing method is omitted.
　イヤホン２０は、音声信号受信用の受信コイル２１と、受信コイル２１と接続された受信回路２２と、受信コイル２１と受信回路２２とを収容する筐体部２３と、筐体部２３に形成された被取り付け部２４と、音声発生部２５と、リード線２６と、を有している。 The earphone 20 is formed in the receiving coil 21 for receiving an audio signal, a receiving circuit 22 connected to the receiving coil 21, a housing part 23 for housing the receiving coil 21 and the receiving circuit 22, and the housing part 23. The attached portion 24, the sound generating portion 25, and the lead wire 26 are provided.
　受信コイル２１は、図３に示すように、コア２１ａと、コア２１ａの周囲を覆うボビン２１ｂと、ボビン２１ｂの周囲に巻き回された導線２１ｃと、で構成される。コア２１ａは、鉄等の磁性体の金属でできた円柱状の部材である。受信コイル２１は、送信コイル１３と磁界結合するためのコイルである。そして、本実施形態では、送信コイル１３と受信コイル２１との磁界結合を利用して、送信コイル１３から送信された電気信号を受信している。 As shown in FIG. 3, the receiving coil 21 includes a core 21a, a bobbin 21b covering the periphery of the core 21a, and a conductive wire 21c wound around the bobbin 21b. The core 21a is a columnar member made of a magnetic metal such as iron. The reception coil 21 is a coil for magnetically coupling with the transmission coil 13. In this embodiment, the electric signal transmitted from the transmission coil 13 is received using the magnetic coupling between the transmission coil 13 and the reception coil 21.
　受信回路２２は、図２に示すように、復調回路２２ａと整流回路２２ｂと定電圧回路２２ｃと、を有している。復調回路２２ａは、受信コイル２１に接続されており、受信コイル２１が受信した電気信号の一部が復調回路２２ａに伝送される。そして、復調回路２２ａは、受信コイル２１から伝送された電気信号の変調成分から音声信号を検出している。 As shown in FIG. 2, the reception circuit 22 includes a demodulation circuit 22a, a rectification circuit 22b, and a constant voltage circuit 22c. The demodulation circuit 22a is connected to the reception coil 21, and a part of the electrical signal received by the reception coil 21 is transmitted to the demodulation circuit 22a. Then, the demodulation circuit 22 a detects an audio signal from the modulation component of the electric signal transmitted from the receiving coil 21.
　整流回路２２ｂも、受信コイル２１に接続されており、受信コイル２１が受信した電気信号の一部が整流回路２２ｂにも伝送される。そして、整流回路２２ｂは、受信コイル２１から伝送された電気信号を整流して、復調回路２２ａを駆動するための電力を取り出している。定電圧回路２２ｃは、整流回路２２ｂの出力電圧を所定の電圧に変換している。定電圧回路２２ｃの出力電圧は、復調回路２２ａの電源として使用される。 The rectifier circuit 22b is also connected to the receiving coil 21, and part of the electrical signal received by the receiving coil 21 is also transmitted to the rectifying circuit 22b. The rectifier circuit 22b rectifies the electrical signal transmitted from the receiving coil 21, and extracts power for driving the demodulator circuit 22a. The constant voltage circuit 22c converts the output voltage of the rectifier circuit 22b into a predetermined voltage. The output voltage of the constant voltage circuit 22c is used as a power source for the demodulation circuit 22a.
　筐体部２３は、合成樹脂等の材質でできた円柱状の部材である。筐体部２３は、受信コイル２１と受信回路２２とを収容している。筐体部２３の外壁２３ａには、本体部１０に取り付けられる被取り付け部２４が形成されている。図１及び図３に示すように、筐体部２３の左側は、ケース１４の取り付け部１５と当接する平面部分となっており、本実施形態では、この部分が被取り付け部２４となっている。また、図３に示すように、筐体部２３の内壁２３ｂの被取り付け部２４と対応する位置には、受信コイル２１が配設されている。 The casing 23 is a columnar member made of a material such as synthetic resin. The casing unit 23 accommodates the reception coil 21 and the reception circuit 22. An attached portion 24 to be attached to the main body portion 10 is formed on the outer wall 23 a of the housing portion 23. As shown in FIGS. 1 and 3, the left side of the housing portion 23 is a planar portion that comes into contact with the attachment portion 15 of the case 14, and in this embodiment, this portion is the attachment portion 24. . As shown in FIG. 3, the receiving coil 21 is disposed at a position corresponding to the attached portion 24 of the inner wall 23 b of the housing portion 23.
　そして、本実施形態では、ケース１４の取り付け部１５と筐体部２３の被取り付け部２４とが当接することに伴って、送信コイル１３と受信コイル２１とが近接し、送信コイル１３のコア１３ａと受信コイル２１のコア２１ａとが磁力で引き合うようになる。そして、送信コイル１３のコア１３ａと受信コイル２１のコア２１ａとが磁力で引き合うことによって、筐体部２３がケース１４に保持される。 In the present embodiment, the transmission coil 13 and the reception coil 21 come close to each other when the attachment portion 15 of the case 14 and the attached portion 24 of the housing portion 23 come into contact with each other, and the core 13a of the transmission coil 13 And the core 21a of the receiving coil 21 are attracted by magnetic force. And the housing | casing part 23 is hold | maintained at the case 14 when the core 13a of the transmission coil 13 and the core 21a of the receiving coil 21 attract with magnetic force.
　また、送信コイル１３と受信コイル２１とが近接することによって、送信コイル１３と受信コイル２１との磁界結合が可能となる。そして、送信コイル１３と受信コイル２１との磁界結合を利用して、送信コイル１３から受信コイル２１に音声信号に対応した電気信号が送信される。小型電子機器１では、このように、送信コイル１３と受信コイル２１との磁界結合を利用して、音声信号に対応した電気信号を本体部１０からイヤホン２０に伝送している。 Further, when the transmission coil 13 and the reception coil 21 are close to each other, the magnetic coupling between the transmission coil 13 and the reception coil 21 becomes possible. Then, an electric signal corresponding to the audio signal is transmitted from the transmission coil 13 to the reception coil 21 using magnetic field coupling between the transmission coil 13 and the reception coil 21. As described above, in the small electronic device 1, the electric signal corresponding to the audio signal is transmitted from the main body unit 10 to the earphone 20 by using the magnetic field coupling between the transmission coil 13 and the reception coil 21.
　音声発生部２５は、受信回路２２が検出した音声信号に対応した音声を発生させている。リード線２６は、受信回路２２と音声発生部２５とを接続している。尚、筐体部２３と音声発生部２５とリード線２６とには防水加工が施されているが、その防水加工方法についての詳細な説明は省略する。 The sound generator 25 generates sound corresponding to the sound signal detected by the receiving circuit 22. The lead wire 26 connects the receiving circuit 22 and the sound generator 25. In addition, although the housing part 23, the sound generation part 25, and the lead wire 26 are waterproofed, the detailed description about the waterproofing method is abbreviate | omitted.
　次に、本実施形態の効果について説明する。本実施形態のような小型電子機器１において、例えば、イヤホン２０が通常のプラグ型のイヤホンであり、本体部１０にプラグ挿入用の貫通孔が形成されている場合、何らかの防水対策を講じたとしても、貫通孔の隙間を完全に塞ぐことは困難である。そのため、貫通孔の隙間から水分が浸入する可能性があった。また、貫通孔に配設された接点用の電極が、侵入した水分によって酸化する可能性もあった。 Next, the effect of this embodiment will be described. In the small electronic device 1 as in the present embodiment, for example, if the earphone 20 is a normal plug-type earphone and a through hole for plug insertion is formed in the main body 10, it is assumed that some measures for waterproofing are taken. However, it is difficult to completely close the gap between the through holes. For this reason, there is a possibility that moisture may enter from the gap between the through holes. In addition, there is a possibility that the contact electrode disposed in the through hole is oxidized by the invading moisture.
　しかしながら、本実施形態の小型電子機器１では、送信コイル１３と受信コイル２１との磁界結合を利用して、音声信号に対応した電気信号を本体部１０からイヤホン２０に伝送するので、本体部１０側の電子回路１１とイヤホン２０とを、プラグを介して接続させる必要が無くなる。そのため、イヤホン２０側では接続用のプラグを備える必要が無くなり、本体部１０側ではプラグを挿入するための貫通孔を形成する必要が無くなる。そして、本体部１０にプラグ挿入用の貫通孔が形成されている場合と比較して、本体部１０側の気密性を飛躍的に高めることができる。また、本体部１０側に接点用の電極を配設する必要も無いので、接点用の電極が水分によって酸化することも無くなる。その結果、小型電子機器１は、防水性の優れたイヤホン付き小型電子機器となる。 However, in the small electronic device 1 of the present embodiment, the electric signal corresponding to the audio signal is transmitted from the main body unit 10 to the earphone 20 using the magnetic field coupling between the transmission coil 13 and the reception coil 21. There is no need to connect the electronic circuit 11 on the side and the earphone 20 via a plug. Therefore, it is not necessary to provide a plug for connection on the earphone 20 side, and it is not necessary to form a through hole for inserting the plug on the main body 10 side. And compared with the case where the through-hole for plug insertion is formed in the main-body part 10, the airtightness by the side of the main-body part 10 can be improved greatly. Further, since it is not necessary to provide a contact electrode on the main body 10 side, the contact electrode is not oxidized by moisture. As a result, the small electronic device 1 becomes a small electronic device with earphones having excellent waterproof properties.
　また、本実施形態の小型電子機器１では、ケース１４の内壁１４ｂの取り付け部１５と対応する位置には、送信コイル１３が配設されている。そして、送信コイル１３のコア１３ａが筐体部２３をケース１４に保持するための磁石となっている。そのため、コア１３ａの磁力を利用して筐体部２３を保持することによって、筐体部２３の保持を容易にすることができる。また、コア１３ａの磁力を利用して筐体部２３と取り付け部１５との位置決めを行うことによって、筐体部２３と取り付け部１５との位置決めを容易にすることもできる。 Further, in the small electronic device 1 of the present embodiment, the transmission coil 13 is disposed at a position corresponding to the attachment portion 15 of the inner wall 14b of the case 14. The core 13 a of the transmission coil 13 serves as a magnet for holding the casing 23 in the case 14. For this reason, the housing 23 can be easily held by holding the housing 23 using the magnetic force of the core 13a. Further, by positioning the housing part 23 and the mounting part 15 using the magnetic force of the core 13a, the positioning of the housing part 23 and the mounting part 15 can be facilitated.
　また、本実施形態のような小型電子機器１の防水性を改善する方法としては、例えば、本体部１０とイヤホン２０とが近距離無線通信規格に対応した無線通信装置を内蔵し、本体部１０とイヤホン２０との無線通信を利用して音声信号を本体部からイヤホンに送信する方法も考えられる。しかしながら、このような方法では、イヤホン２０側に電力供給用の電池が必要となり、イヤホン２０が大型化すると共に、イヤホン２０側で電池交換の煩わしさが生じる。 Further, as a method for improving the waterproof property of the small electronic device 1 as in the present embodiment, for example, the main body 10 and the earphone 20 have a built-in wireless communication device that supports short-range wireless communication standards, and the main body 10 A method of transmitting an audio signal from the main body unit to the earphone by using wireless communication with the earphone 20 is also conceivable. However, in such a method, a battery for power supply is required on the earphone 20 side, and the earphone 20 is increased in size, and troublesome battery replacement occurs on the earphone 20 side.
　一方、本実施形態の小型電子機器１では、送信コイル１３と受信コイル２１との磁界結合を利用して、音声信号に対応した電気信号と共に復調回路を駆動するための電力を、本体部１０からイヤホン２０に伝送している。そのため、イヤホン２０側では電力供給用の電池を内蔵しなくても良い。その結果、イヤホン２０を小型化し易くなり、また、イヤホン２０側での電池交換の煩わしさを解消することができる。 On the other hand, in the small electronic device 1 of the present embodiment, the electric power for driving the demodulation circuit is supplied from the main body unit 10 together with the electrical signal corresponding to the audio signal by using the magnetic coupling between the transmission coil 13 and the reception coil 21. It is transmitted to the earphone 20. Therefore, the earphone 20 does not need to incorporate a power supply battery. As a result, the earphone 20 can be easily downsized, and the troublesome battery replacement on the earphone 20 side can be eliminated.
　［第２実施形態］
　以下、本発明の第２実施形態について図面を参照しながら説明する。尚、本実施形態において、前述した第１実施形態と同一の構成である場合、同一符号を付して詳細な説明は省略する。 [Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, in this embodiment, when it is the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
　まず、本発明の第２実施形態に係る小型電子機器１０１の構成について、図４及び図５を用いて説明する。図４は、本発明の第２実施形態に係る小型電子機器１０１の構成を示す説明図である。図５は、図４に示す取り付け部１１５と被取り付け部１２４との構造を模式的に示す説明図である。 First, the configuration of the small electronic device 101 according to the second embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is an explanatory diagram showing the configuration of the small electronic device 101 according to the second embodiment of the present invention. FIG. 5 is an explanatory view schematically showing the structure of the attaching portion 115 and the attached portion 124 shown in FIG.
　小型電子機器１０１は、図４に示すように、本体部１０とイヤホン２０とを備えている。本体部１０は、送信回路１２を含む電子回路１１と、音声信号送信用の送信コイル１３と、電子回路１１と送信コイル１３とを収容するケース１４と、ケース１４に形成された取り付け部１１５と、入力手段１６と、表示手段１７と、を有している。 The small electronic device 101 includes a main body 10 and an earphone 20 as shown in FIG. The main body 10 includes an electronic circuit 11 including a transmission circuit 12, a transmission coil 13 for transmitting an audio signal, a case 14 that houses the electronic circuit 11 and the transmission coil 13, and an attachment 115 formed on the case 14. , Input means 16 and display means 17.
　図４及び図５に示すように、ケース１４の右側面の外壁１４ａの所定の位置には、円柱状の凹部１１５ａが形成されており、本実施形態では、ケース１４の外壁１４ａの凹部１１５ａを含む部分が、取り付け部１１５となっている。また、図５に示すように、ケース１４の内壁１４ｂの凹部１１５ａと対応する位置には、送信コイル１３が配設されている。 As shown in FIGS. 4 and 5, a cylindrical recess 115a is formed at a predetermined position of the outer wall 14a on the right side surface of the case 14, and in this embodiment, the recess 115a of the outer wall 14a of the case 14 is formed. The part to include is the attachment portion 115. Further, as shown in FIG. 5, the transmission coil 13 is disposed at a position corresponding to the concave portion 115 a of the inner wall 14 b of the case 14.
　イヤホン２０は、音声信号受信用の受信コイル２１と、受信コイル２１と接続された受信回路２２と、受信コイル２１と受信回路２２とを収容する筐体部２３と、筐体部２３に形成された被取り付け部１２４と、音声発生部２５と、リード線２６と、を有している。 The earphone 20 is formed in the receiving coil 21 for receiving an audio signal, a receiving circuit 22 connected to the receiving coil 21, a housing part 23 for housing the receiving coil 21 and the receiving circuit 22, and the housing part 23. The attached portion 124, the sound generation unit 25, and the lead wire 26 are provided.
　図４及び図５に示すように、筐体部２３の外壁２３ａには、取り付け部１１５の凹部１１５ａに挿入可能な円柱状の凸部１２４ａが形成されており、本実施形態では、筐体部２３の外壁２３ａの凸部１２４ａを含む部分が、被取り付け部１２４となっている。また、図５に示すように、筐体部２３の内壁２３ｂの被取り付け部１２４と対応する位置には、受信コイル２１が配設されている。受信コイル２１のコア２１ａは、凸部１２４ａの先端付近まで延びている。 As shown in FIGS. 4 and 5, the outer wall 23 a of the housing portion 23 is formed with a columnar convex portion 124 a that can be inserted into the recessed portion 115 a of the mounting portion 115. In this embodiment, the housing portion A portion including the convex portion 124 a of the outer wall 23 a of the 23 is an attached portion 124. Further, as shown in FIG. 5, the receiving coil 21 is disposed at a position corresponding to the attached portion 124 of the inner wall 23 b of the housing portion 23. The core 21a of the receiving coil 21 extends to the vicinity of the tip of the convex portion 124a.
　そして、本実施形態では、被取り付け部１２４の凸部１２４ａが取り付け部１１５の凹部１１５ａに挿入されると共に、送信コイル１３のコア１３ａと受信コイル２１のコア２１ａとが磁力で引き合うことによって、筐体部２３がケース１４に保持される。 In this embodiment, the convex portion 124a of the attachment portion 124 is inserted into the concave portion 115a of the attachment portion 115, and the core 13a of the transmission coil 13 and the core 21a of the reception coil 21 are attracted by a magnetic force, thereby The body part 23 is held by the case 14.
　次に、本実施形態の効果について説明する。本実施形態の小型電子機器１０１では、ケース１４の外壁１４ａに円柱状の凹部１１５ａが形成されており、ケース１４の外壁１４ａの凹部１１５ａを含む部分が、取り付け部１１５となっている。また、筐体部２３には、取り付け部１１５の凹部１１５ａに挿入可能な凸部１２４ａが形成されており、筐体部２３の凸部１２４ａを含む部分が、被取り付け部１２４となっている。そのため、送信コイルのコア１３ａの磁力を利用して筐体部２３を保持するだけでなく、被取り付け部１２４の凸部１２４ａが取り付け部１１５の凹部１１５ａに挿入されることによって、筐体部２３の横ずれを防止することもできる。その結果、筐体部２３の保持を更に容易にすることができる。 Next, the effect of this embodiment will be described. In the small electronic device 101 of this embodiment, a cylindrical recess 115 a is formed in the outer wall 14 a of the case 14, and a portion including the recess 115 a of the outer wall 14 a of the case 14 is an attachment portion 115. In addition, the housing portion 23 is formed with a convex portion 124 a that can be inserted into the concave portion 115 a of the attachment portion 115, and a portion including the convex portion 124 a of the housing portion 23 is the attached portion 124. For this reason, not only is the case 23 held using the magnetic force of the core 13a of the transmission coil, but the projection 124a of the attachment portion 124 is inserted into the depression 115a of the attachment portion 115, whereby the case portion 23 is obtained. Can also be prevented. As a result, the holding of the housing part 23 can be further facilitated.
　以上、本発明の実施形態について説明してきたが、本発明は上記の実施形態に限定されず、本発明の目的の範囲を逸脱しない限りにおいて適宜変更することができる。 As mentioned above, although the embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the object of the present invention.
　例えば、本発明の実施形態において、小型電子機器１と小型電子機器１０１とは、携帯音楽プレーヤや携帯ＴＶ以外の電子機器であっても構わない。例えば、小型電子機器１と小型電子機器１０１とは、携帯情報端末や携帯ゲーム機等のような電子機器であっても構わない。また、小型電子機器１と小型電子機器１０１とは、電子機器の機能に合わせて、前述した以外の電子回路や装備を備えていても構わない。 For example, in the embodiment of the present invention, the small electronic device 1 and the small electronic device 101 may be electronic devices other than a portable music player or a portable TV. For example, the small electronic device 1 and the small electronic device 101 may be electronic devices such as a portable information terminal and a portable game machine. Further, the small electronic device 1 and the small electronic device 101 may include electronic circuits and equipment other than those described above in accordance with the function of the electronic device.
　また、本発明の実施形態において、送信回路１２の回路構成と受信回路２２の回路構成とは、前述した以外の回路構成であっても構わない。また、本体部１０からイヤホン２０に送信される電気信号に加えられる変調は、ＦＭ変調ではなくＡＭ変調やデジタル変調であっても構わない。 In the embodiment of the present invention, the circuit configuration of the transmission circuit 12 and the circuit configuration of the reception circuit 22 may be circuit configurations other than those described above. Further, the modulation added to the electric signal transmitted from the main body unit 10 to the earphone 20 may be AM modulation or digital modulation instead of FM modulation.
　また、本発明の実施形態において、本体部１０は、送信コイル１３付近の磁界の変化を検出する磁界検出手段を有していても構わない。そして、磁界の変化に基づいてイヤホン２０が取り付けられたか否かを判断し、イヤホンが取り付けられていない場合には、信号発生回路１２ａや増幅回路１２ｃの機能を停止させても構わない。イヤホンが取り付けられていない場合に信号発生回路１２ａや増幅回路１２ｃの機能を停止させることによって、無駄な電力消費を抑制することができる。 In the embodiment of the present invention, the main body 10 may include a magnetic field detection unit that detects a change in the magnetic field near the transmission coil 13. Then, it is determined whether or not the earphone 20 is attached based on the change in the magnetic field. If the earphone is not attached, the functions of the signal generation circuit 12a and the amplification circuit 12c may be stopped. By stopping the functions of the signal generation circuit 12a and the amplification circuit 12c when the earphone is not attached, wasteful power consumption can be suppressed.
　また、本実施形態では、送信コイル１３のコア１３ａが磁石であり、受信コイル２１のコア２１ａが磁性体の金属であったが、送信コイル１３のコア１３ａが磁性体の金属であり、受信コイル２１のコア２１ａが磁石であっても構わない。また、送信コイル１３のコア１３ａと受信コイル２１のコア２１ａとが共に磁石であっても構わない。 In this embodiment, the core 13a of the transmission coil 13 is a magnet and the core 21a of the reception coil 21 is a magnetic metal. However, the core 13a of the transmission coil 13 is a magnetic metal, and the reception coil The 21 cores 21a may be magnets. Moreover, both the core 13a of the transmission coil 13 and the core 21a of the reception coil 21 may be magnets.
　また、本発明の実施形態において、送信コイル１３と受信コイル２１とが磁力で引き合うのであれば、送信コイル１３と受信コイル２１とは、前述した以外の構造のコイルであっても構わない。また、磁力以外の方法によって、筐体部２３（又は筐体部２３）をケース１４に保持させても構わない。 In the embodiment of the present invention, as long as the transmission coil 13 and the reception coil 21 are attracted by magnetic force, the transmission coil 13 and the reception coil 21 may be coils having a structure other than those described above. Moreover, you may hold | maintain the housing | casing part 23 (or housing | casing part 23) in the case 14 by methods other than magnetic force.
　１　小型電子機器
　１０　本体部
　１１　電子回路
　１２　送信回路
　１２ａ　信号発生回路
　１２ｂ　変調回路
　１２ｃ　増幅回路
　１２ｄ　制御回路
　１３　送信コイル
　１３ａ　コア
　１３ｂ　ボビン
　１３ｃ　導線
　１４　ケース
　１４ａ　外壁
　１４ｂ　内壁
　１５　取り付け部
　１６　入力手段
　１７　表示手段
　２０　イヤホン
　２１　受信コイル
　２１ａ　コア
　２１ｂ　ボビン
　２１ｃ　導線
　２２　受信回路
　２２ａ　復調回路
　２２ｂ　整流回路
　２２ｃ　定電圧回路
　２３　筐体部
　２３ａ　外壁
　２３ｂ　内壁
　２４　被取り付け部
　２５　音声発生部
　２６　リード線
　１０１　小型電子機器
　１１５　取り付け部
　１１５ａ　凹部
　１２４　被取り付け部
　１２４ａ　凸部 DESCRIPTION OF SYMBOLS 1 Small electronic device 10 Main body part 11 Electronic circuit 12 Transmission circuit 12a Signal generation circuit 12b Modulation circuit 12c Amplification circuit 12d Control circuit 13 Transmission coil 13a Core 13b Bobbin 13c Conductor 14 Case 14a Outer wall 14b Inner wall 15 Attachment part 16 Input means 17 Display means 20 Earphone 21 Receiving coil 21a Core 21b Bobbin 21c Conductor 22 Receiving circuit 22a Demodulating circuit 22b Rectifying circuit 22c Constant voltage circuit 23 Housing part 23a Outer wall 23b Inner wall 24 Attached part 25 Audio generating part 26 Lead wire 101 Small electronic device 115 Attaching part 115a Concave portion 124 Mounted portion 124a Convex portion

Claims (4)

  1. 　本体部と、
    　前記本体部に取り付けられるイヤホンと、
    　を備えたイヤホン付き小型電子機器であって、
    　前記本体部は、
    　音声信号に対応した電気信号を生成する送信回路を含む電子回路と、
    　前記送信回路と接続された送信コイルと、
    　前記電子回路と前記送信コイルとを収容するケースと、
    　前記ケースの外壁に形成された取り付け部と、を有し、
    　前記イヤホンは、
    　前記送信コイルとの磁界結合が可能な受信コイルと、
    　前記受信コイルに接続された受信回路と、
    　前記受信コイルと前記受信回路とを収容する筐体部と、
    　前記筐体部の外壁に形成された被取り付け部と、を有し、
    　前記送信コイルは、
    　前記ケースの内壁の前記取り付け部と対応する位置に配設され、
    　前記受信コイルは、
    　前記筐体部の内壁の前記被取り付け部と対応する位置に配設され、
    　前記送信コイルと前記受信コイルとの磁界結合を利用して、
    　前記電気信号を前記本体部から前記イヤホンに伝送することを特徴とするイヤホン付き小型電子機器。     The main body,
    An earphone attached to the main body,
    A small electronic device with an earphone equipped with
    The body part is
    An electronic circuit including a transmission circuit that generates an electrical signal corresponding to the audio signal;
    A transmission coil connected to the transmission circuit;
    A case for housing the electronic circuit and the transmission coil;
    A mounting portion formed on the outer wall of the case,
    The earphone is
    A receiving coil capable of magnetic field coupling with the transmitting coil;
    A receiving circuit connected to the receiving coil;
    A housing for housing the receiving coil and the receiving circuit;
    An attached portion formed on the outer wall of the housing portion,
    The transmission coil is
    Disposed at a position corresponding to the mounting portion of the inner wall of the case,
    The receiving coil is
    Disposed at a position corresponding to the attached portion of the inner wall of the housing portion;
    Utilizing magnetic field coupling between the transmitting coil and the receiving coil,
    A small electronic device with an earphone, wherein the electric signal is transmitted from the main body to the earphone.
  2. 　前記取り付け部と前記被取り付け部との少なくとも一方には、
    　前記筐体部を前記ケースに保持するための磁石が配設されていることを特徴とする、
    　請求項１に記載のイヤホン付き小型電子機器。     At least one of the attachment portion and the attachment portion includes
    A magnet for holding the casing portion in the case is disposed,
    The small electronic device with an earphone of Claim 1.
  3. 　前記取り付け部は、
    　前記ケースの外壁に形成された凹部を含み、
    　前記被取り付け部は、
    　前記凹部に挿入可能な凸部を含んでいることを特徴とする、
    　請求項１又は請求項２に記載のイヤホン付き小型電子機器。     The mounting portion is
    Including a recess formed in the outer wall of the case,
    The attached portion is
    It includes a convex portion that can be inserted into the concave portion,
    The small electronic device with an earphone of Claim 1 or Claim 2.
  4. 　前記送信コイルと前記受信コイルとの磁界結合を利用して、
    　前記電気信号と共に前記受信回路を駆動するための電力を、
    　前記本体部から前記イヤホンに送信することを特徴とする、
    　請求項１ないし請求項３のいずれかに記載のイヤホン付き小型電子機器。     Utilizing magnetic field coupling between the transmitting coil and the receiving coil,
    Power for driving the receiving circuit together with the electrical signal,
    Transmitting from the main body to the earphone,
    The small electronic device with an earphone in any one of Claims 1 thru | or 3.
PCT/JP2014/084235 2013-12-26 2014-12-25 Earphone-equipped compact electronic device WO2015099006A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013268218A JP2017038097A (en) 2013-12-26 2013-12-26 Compact electronic apparatus with earphone
JP2013-268218 2013-12-26

Publications (1)

Publication Number Publication Date
WO2015099006A1 true WO2015099006A1 (en) 2015-07-02

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ID=53478853

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WO (1) WO2015099006A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05260578A (en) * 1992-03-13 1993-10-08 Aiwa Co Ltd Speaker with built-in amplifier
JP2000217181A (en) * 1999-01-26 2000-08-04 Kobe Steel Ltd Acoustic information reproducing device
JP2003524354A (en) * 2000-02-21 2003-08-12 アクロニム・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Device for fixing earphone and / or small microphone
JP2005203857A (en) * 2004-01-13 2005-07-28 Seiko Epson Corp Portable music player
JP2007110545A (en) * 2005-10-14 2007-04-26 Takao:Kk Tool for listening sound

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05260578A (en) * 1992-03-13 1993-10-08 Aiwa Co Ltd Speaker with built-in amplifier
JP2000217181A (en) * 1999-01-26 2000-08-04 Kobe Steel Ltd Acoustic information reproducing device
JP2003524354A (en) * 2000-02-21 2003-08-12 アクロニム・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Device for fixing earphone and / or small microphone
JP2005203857A (en) * 2004-01-13 2005-07-28 Seiko Epson Corp Portable music player
JP2007110545A (en) * 2005-10-14 2007-04-26 Takao:Kk Tool for listening sound

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