JP4126562B2 - Hands-free device - Google Patents

Description

  The present invention relates to a hands-free device that performs wireless communication with a mobile terminal and performs communication via a telephone communication network.

  A hands-free system has been developed for a vehicle driver to use a mobile phone safely in a vehicle. This hands-free system is intended to improve driving safety by eliminating the need for a driver to make a call with a mobile phone with one hand during driving.

  Conventionally, an in-vehicle hands-free system uses a microphone and a speaker installed in a vehicle by connecting a mobile phone and an in-vehicle device by wire or wirelessly (Patent Document 1). However, since the position of the microphone and speaker installed in the vehicle is far from the driver, the sound quality is not good.

  Therefore, a headset in which headphones and a microphone are integrated has been devised. If this is used, a call can be made with sufficient sound quality.

JP 2002-193046 A

  However, it is cumbersome to wear a headset with a headphone and microphone integrated before driving, and if you forget to wear it and carry it in your bag, Cannot be used by attaching to, and may not be useful. Furthermore, such a headset has a drawback that it requires charging from an AC power source and cannot be used if it is forgotten to be charged.

  Accordingly, an object of the present invention is to provide a hands-free device for a mobile phone used in a vehicle, which can be taken out immediately while the vehicle is operating.

Means for Solving the Problems and Effects of the Invention

The hands-free device of the present invention for solving the above problems is
A wireless communication device including a communication unit that performs wireless communication with a mobile terminal that performs communication via a telephone communication network, an earphone unit that is inserted into an ear hole and listens to sound, and a microphone unit that inputs sound;
The wireless communication device is integrated with the wireless communication device in a separable state, and includes a key for starting the vehicle engine, and the earphone portion of the wireless communication device separated from the key is inserted into the ear hole to attach the wireless communication device to the ear In this state, the communication unit performs communication via the telephone communication network by performing wireless communication with the portable terminal.

  Since the wireless communication device and the key are integrated, it is convenient to carry. Further, the wireless communication device can be attached to the ear by separating the wireless communication device from the key and inserting the earphone portion of the wireless communication device into the ear hole. Therefore, even when the vehicle is in operation, the user can easily make a call by wearing the wireless communication device on the ear.

Moreover, the second hands-free device of the present invention for solving the above-mentioned problems is
A key cylinder provided in the vehicle having a keyhole of a key for starting the engine of the vehicle and a first terminal connected to a battery of the vehicle in the vicinity of the opening of the keyhole;
Electricity is charged by a battery, a communication unit that performs wireless communication with a mobile terminal that communicates via a telephone communication network, an earphone unit that is inserted into an ear hole to listen to audio, a microphone unit that inputs audio, and a battery A wireless communication device including a charging unit and a second terminal that is electrically connected to the charging unit and electrically connected to the charging unit;
A key portion inserted into a key hole of the key cylinder, and a key grip portion connected to the key portion, the conductor having a conductor portion that enables electrical connection between the first terminal of the key cylinder and the second terminal of the wireless communication device. And a key that starts the engine of the vehicle, and is integrated with the wireless communication device, and the wireless communication device and the key are integrated, and the key portion is inserted into the key hole so that the battery can Is charged, the wireless communication device is separated from the key, and the earphone unit is inserted into the ear hole to attach the wireless communication device to the ear, and the communication unit performs wireless communication with the portable terminal to establish the telephone communication network. Communication via

  According to the above configuration, the charging unit is charged by the battery when the wireless communication device and the key are integrated and the key unit is inserted into the key hole for the ignition key of the vehicle. The wireless communication device can be attached to the ear by separating the wireless communication device from the key and inserting the earphone portion into the ear hole. And a communication part can perform communication via a telephone communication network by performing wireless communication with a portable terminal.

Furthermore, the hands-free device of the present invention is
The key cylinder includes a magnet near the opening of the keyhole of the key,
The wireless communication device includes a metal body whose end is exposed, and a coil that is formed in the metal body and in which a current is passed by an incoming signal from a mobile terminal,
The key gripping part of the key includes a key metal body for holding the wireless communication device by transmitting the magnetic force of the magnet to the metal body of the wireless communication device,
When the key is inserted into the key cylinder, the magnet's magnetic force holds the wireless communication device via the key grip, and when there is an incoming signal from the mobile terminal, current is passed through the coil and the magnet's holding force is weakened. The wireless communication device can be easily separated from the key.

  According to the above configuration, when the key is inserted into the key cylinder, the radio communication device can be firmly held on the key by the magnet of the key cylinder. By doing so, it is possible to make it difficult to separate the wireless communication devices in cases other than calls. An incoming signal from the portable terminal causes a current to flow through the coil so that a magnetic flux is generated in a direction that weakens the holding force of the magnet, and the wireless communication device can be easily separated from the key. Therefore, when necessary for a call, the wireless communication device can be separated from the key and attached to the ear.

  And the main-body part containing the communication part of the radio | wireless communication apparatus of this invention has a box shape, for example, and can protrude and form an earphone part from one surface of a main-body part. Such a shape is compact and convenient to carry.

  The wireless communication between the wireless communication device and the portable terminal can use Bluetooth. Bluetooth is a short-range wireless data communication technology that uses radio waves in the 2.4 GHz frequency band that do not require individual radio licenses as carrier radio waves. By adopting Bluetooth as a communication method, bidirectional communication can be performed, and a wireless communication device can be manufactured at low cost.

  The first structure for coupling the wireless communication device and the key is configured such that the wireless communication device has an elastically deformable claw portion for coupling with the key and a release means for releasing the coupling. The wireless communication device and the key are integrated with each other by the claw portion, and the wireless communication device is separated from the key to perform a call.

  The second of the coupling structure of the wireless communication device and the key is configured so that one of the wireless communication device and the key has a fitting portion and the other has a fitted portion that fits the fitting portion. And it is united by fitting with a fitting part and a to-be-fitted part, and a radio | wireless communication apparatus is separated from a key, and a telephone call is performed.

  The third of the coupling structure of the wireless communication device and the key is configured to have a magnet on one side of the wireless communication device or key and a metal piece or magnet on the other side. The key and the wireless communication device are integrally coupled by the magnetic force of the magnet, and the wireless communication device is separated from the key to perform a call.

  The fourth of the coupling structure of the wireless communication device and the key is configured to have a slide rail on one surface of the wireless communication device or the key and a rail groove engaged with the slide rail on the other surface. . The wireless communication device and the key are integrated by the slide rail and the rail groove, and the wireless communication device is slid and separated from the key to make a call.

    The fifth of the coupling structure of the wireless communication device and the key is that the earphone portion protruding from one surface of the wireless communication device has a rotation shaft portion, and the key is fitted wirelessly around the rotation shaft portion by fitting the rotation shaft portion. A rotation shaft recess for rotating the communication device is provided. The rotary shaft portion is removed from the concave portion for the rotary shaft, and the wireless communication device is separated from the key to make a call.

  With the above structure, the wireless communication device and the key can be easily attached and detached. Therefore, it is convenient because the wireless communication device and the key can be carried together, and the key can be quickly separated from the wireless communication device during a call.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an overall configuration of a hands-free system for a portable terminal including a headset which is a wireless communication device. A mobile phone 91 which is a mobile terminal is for communicating with a telephone communication network, and the headset 1 can wirelessly communicate with the mobile phone 91.

  The headset 1 includes a wireless communication unit 2 for communicating with a mobile phone 91, a speaker 3 for outputting sound, a microphone 4 for inputting sound, a charging unit 5 charged by an external power supply, a call button 6, a memory 7 and a control unit 10 for controlling them. The speaker 3 can listen to the voice of the other party, and can talk by speaking to the microphone 4.

  The wireless communication unit 2 can perform short-range wireless communication conforming to Bluetooth (registered trademark) and communicates with the mobile phone 91. The charging unit 5 is electrically connected to the battery 69 of the vehicle when the headset 1 and the key 30 are integrally inserted into the ignition key hole, and is charged by the battery 69. The memory 7 stores mobile phone identification data that is a target of a call. When the target mobile phone receives an incoming call, a ring tone is emitted from the speaker 3, and the headset 1 is pressed by pressing the call button 6. A call becomes possible.

  The cellular phone 91 includes a wireless communication unit 96 for performing wireless communication with the headset 1, a speaker 97, a microphone 98, an input unit 94 for inputting a telephone number, a display unit 93 for performing various displays, and a telephone communication network. A communication unit 92 for communicating with the storage unit, a storage unit 95 for storing data and the like, and a control unit 99 connected to them for controlling. The storage unit 95 of the mobile phone stores headset identification data related to the headset 1 that performs wireless communication. When there is an incoming call through the telephone communication network, the wireless communication unit 96 communicates with the headset 1. Thereby, a call can be made by the headset 1.

  FIG. 2 shows an external view of the hands-free device. (A) is a top view of the hands-free device 100 in which the headset 1 and the vehicle key 30 are integrated. The headset 1 has a call button 6 for enabling a call when an incoming call is received, a microphone 3 for inputting sound, an earphone 13 for listening to sound, and an unlocking function for separating the headset from the key. It has a button 11. The key 30 includes a key portion 45 that is inserted into the ignition keyhole and a key grip portion 31.

  FIG. 2B shows a side view of the hands-free device 100. The key 30 and the headset 1 are connected and integrated, and the earphone unit 13 is formed so as to protrude from the upper surface 18 of the headset 1.

  FIG. 2C shows the headset 1 and the key 30 separated. By depressing the unlocking button 11 which is the releasing means, the locking claw 12 which is an elastically deformable claw part of the headset 1 is released from the key locking hole (not shown), and the head Set 1 and key 30 are separated.

  The hands-free device 100 is convenient to carry because the key 30 and the headset 1 are integrated. A driver of the vehicle inserts the key 30 into a key cylinder for the ignition of the vehicle with the headset 1 and the key 30 integrated, and starts the engine of the vehicle. When the mobile phone 91 arrives during driving, a signal is transmitted from the wireless communication unit 96 of the mobile phone 91 via the wireless communication unit 2 of the headset 1. The driver presses the lock release button 11 of the headset 1 while the key 31 is inserted into the key cylinder, separates the headset 1 from the key 30, and attaches the headset 1 to the ear. This is done by inserting the earphone part 13 into the ear hole. An example of use is shown in FIG. The mobile phone 91 and the headset 1 communicate with each other via Bluetooth, and the wearer of the headset 1 can listen to the sound from the earphone 13 of the headset 1 and can input the sound through the microphone 3.

  As described above, since the headset 1 is integrated with the key 30 in the hands-free device 100, it is convenient to carry, and the headset 1 can be easily separated. Since the earphone part 13 protrudes from the key 30 when the headset 1 is separated from the key 30, the headset 1 can be attached to the ear by inserting the earphone part 13 into the ear.

  FIG. 4 shows another combination of the headset and the key. (A) is a top view, (b) is a side view. The key holding portion 31 is formed with a fitting convex portion 21, and the headset 1 is formed with a fitting concave portion 22. As shown in (b), the headset 1 and the key 30 can be integrated by fitting the fitting convex portion 21 and the fitting concave portion 22 together. In addition, you may reverse formation of a fitting convex part and a fitting recessed part. That is, a fitting concave portion may be formed in the key grip portion, and a fitting convex portion may be formed in the headset. A fitting convex part and a fitting concave part are a fitting part and a to-be-fitted part.

  FIG. 5 further shows another form of combination of the headset and the key. A magnet 26 is incorporated in a portion of the headset 1 opposite to that. A metal piece 25 is incorporated in the portion of the key 30 that becomes the joint surface with the headset 1. As a metal piece, what is adsorbed by a magnet, such as iron, may be used. A magnet may be incorporated in the key 30 instead of the metal piece. By combining the key 30 and the headset 1, the headset 1 and the key 30 are joined by magnetic force.

  FIG. 6 shows an embodiment of a rotary folding type. (A) is a plan view and (b) is a side view. The key 30 is formed with a rotation coupling portion 41, and the headset 1 is formed with a rotation coupling portion 42, which are coupled by the rotation coupling portions 41, 42. As shown to (a), (b), it can fold in the state couple | bonded by the rotation coupling | bond part 41,42. When the key 30 is inserted into the key cylinder in order to operate the engine of the vehicle, the headset 1 is rotated and deployed so as to be flush with the key 30 as shown in FIG. Further, in the developed state as shown in (c), it becomes possible to separate the coupling of the rotary coupling parts 41 and 42, and as shown in (d), the key 30 and the headset 1 can be separated.

  FIG. 7 shows a slide type embodiment. (A) is a plan view and (b) is a side view. The key 30 and the headset 1 are integrated with each other in a state where they overlap each other. The slide part of the slide type embodiment will be described with reference to FIGS. As shown in FIG. 7 (c), an engagement rail 35 is formed on the lower surface of the key 30, and an engagement groove 17 is formed on the upper surface of the headset 1 for engaging therewith. As a result, the key 1 and the headset 30 can be engaged with each other. As shown in FIG. 7D, an engagement rail 35 'and an engagement groove 17' may be formed.

  By forming the engaging groove (rail groove) 17 and the engaging rail (sliding rail) 35 as shown in FIGS. 7C and 7D, as shown in FIGS. 1 and the key 30 can be held together. Then, as shown in FIG. 8A, by sliding the headset 1, there is no overlap between the key 30 and the headset 1, and the engine can be started by inserting the key 30 into the key cylinder. It becomes. Furthermore, the key 30 and the headset 1 can be separated by sliding the headset 1 as shown in FIG.

  FIG. 9 shows a rotating slide type embodiment. (A) is a plan view and (b) is a side view. The key 30 and the headset 1 are integrated with each other in a state where they overlap each other. As shown in FIG. 9 (c), the earphone unit 13 is formed by a tip portion 13 a and a rotating shaft portion 13 b, and the length of the rotating shaft portion 13 b is formed approximately equal to the thickness of the key grip portion 31 of the key 30. ing. Then, the headset 1 and the key 30 can be integrated with each other by fitting the earphone part 13 into the rotary shaft recess 35 of the key 30. Further, as shown in (a), an engagement groove 37 is formed in the key gripping part 31, and as shown in (a) and (c), a protrusion 13t is formed on the rotating shaft part 13b of the earphone part 13. Is formed. In the state (a), the protrusion 13t hits the side surface of the engagement groove 37 and the headset 1 cannot be pulled out from the key and separated.

  Then, as shown in FIG. 10A, the rotary slide type hands-free device shown in FIG. 9 rotates the headset 1 by 90 degrees with respect to the key 30 around the earphone unit 13, thereby moving the key 30. It can be inserted into the key cylinder. Further, as shown in (b), by rotating 90 degrees (180 degrees from the original position), the headset 13 is pulled away as shown in (c) without the protrusion 13t hitting the side surface of the engaging groove 37. Can do.

  Next, charging of the headset will be described with reference to FIG. As shown to (a), the key cylinder 60 of a vehicle has the terminal 61 in the vicinity of the keyhole 63. FIG. One of the terminals 61 is connected to the vehicle battery 69 and the other is grounded. Two conductor portions 66 are installed inside the key grip portion 31, and both ends of the conductor portions 66 are exposed to the outside and serve as terminals 65a and 65b.

  Further, two terminals 75 are exposed on the joint surface of the headset 1 with the key gripping portion 31, and can be joined with the terminal 65 b of the key gripping portion 31. Inside the headset 1, the charging unit 5 (rechargeable battery) is incorporated as described above, and the terminal 75 is connected to the charging unit 5.

  By integrating the key 30 and the headset 1 with the above configuration, the terminal 75 of the headset 1 and the terminal 65b of the key 30 are connected. As shown in FIG. By inserting the key 30 into the key hole 63, the terminal 61 of the key cylinder 60 and the key terminal 65a are connected, and the charging unit of the headset 1 can be charged by the battery 69 of the vehicle.

  A rotary folding charging structure will be described with reference to FIG. As shown in FIGS. 12A and 12B, it can be carried in a folded state. In this state, the terminal 65b of the key grip portion 31 and the terminal 75 of the headset 1 are separated. When starting the engine of the vehicle, as shown in FIG. 12 (c), the terminal 65b and the terminal 75 are brought into contact with each other by opening this, and the charging unit of the headset 1 is charged by the battery. It becomes possible.

  A slide-type charging structure will be described with reference to FIG. The terminal 65a of the key 30 connected to the terminal 61 of the cylinder 60 of the vehicle is formed on the side surface where the key portion 45 is formed, as in the above-described embodiment. The terminal 65b connected to the headset 1 of the key 30 is formed on the lower surface 32 of the key 30 as shown in FIG. The terminal 75 of the headset 1 is formed at the end of the upper surface 18 and is exposed to the outside without being connected to the terminal 65b when the hands-free device is folded.

  As shown in FIG. 13C, when the headset 1 is slid along the key gripping portion 31 so that the key 30 can be inserted into the key cylinder 60, terminals formed on the lower surface 32 of the key gripping portion 31. 65 b comes into contact with the contact 75 formed on the upper surface 18 of the headset 75 and is inserted into the key cylinder 60, so that the charging unit 5 of the headset 1 can be charged by the battery 69 of the vehicle.

  FIG. 14 illustrates a rotating slide type charging structure. The terminal 65a of the key 30 connected to the terminal 61 of the cylinder 60 of the vehicle is formed on the side surface where the key portion 45 is formed, as in the above-described embodiment. A terminal 65 b connected to the headset 1 of the key 30 is formed on the lower surface 32 of the key 30. Furthermore, as shown in FIG. 14B, the terminals 75 of the headset 1 are formed side by side along the longitudinal direction of the headset 1 in the vicinity of the earphone unit 13 serving as a rotation axis.

  Then, as shown in FIG. 14C, when the headset 1 is rotated 90 degrees from the accommodated state to be inserted into the key cylinder, the terminal 65b formed on the lower surface 32 of the key grip portion 31 and the headset The terminal 75 formed on the upper surface of the contact 1 comes into contact. By inserting the key 30 into the key cylinder 60 in this state, the rechargeable battery of the headset can be charged by the battery of the vehicle.

  Next, a headset holding structure using a magnet will be described. As shown in FIG. 15, a magnet 112 is included in the vicinity of the opening of the key hole 63 of the key cylinder 60 of the vehicle. The magnet 112 is in contact with the iron core 111, and the iron core 111 is exposed outside the key cylinder. The key gripping portion 31 of the key 30 also includes two iron cores 120, which are key metal bodies, and the contacts 121a and 122b are exposed to the outside. Further, a coil 135 is formed inside the headset 1, and both ends thereof are exposed to the outside as contact points 131. When a mobile phone is received by the coil 135, a current is passed by the control unit 10 that has received the incoming call, and a magnetic flux is generated.

  FIG. 15B shows a case where the headset 1 and the key 30 are integrated and inserted into the key cylinder of the vehicle. The headset 1 is adsorbed by the magnet 112 of the key cylinder through the iron core 120 of the key grip portion 31. For this reason, the headset 1 is not easily separated from the key 30. In this state, when the mobile phone receives an incoming call and the headset 1 receives it, a current flows through the coil 135 so that a magnetic flux is generated in a direction in which the magnetic flux of the magnet 112 is weakened. Thereby, the attractive force of the headset 1 by the magnet 112 is weakened by the magnetic flux generated by the coil 135, and the headset 1 can be easily detached from the key.

  FIG. 16 shows an example of another holding structure of a headset using a magnet. As shown in (a), two iron cores 120 are included in the key grip portion 31 as in the previous embodiment. Both ends 121a and 121b are exposed to the outside, and the end 121a can contact the iron core 111 connected to the magnet 112 of the key cylinder. The end portion 121b can contact the end portion 131 of the iron core included in the headset 1. A fitting recess 38 is formed on the lower surface of the key grip portion 31.

  A coil 135 is formed inside the headset 1 and its end 131 is exposed to the outside. When a mobile phone is received by the coil 135, a current is passed by the control unit 10 that has received the incoming call, and a magnetic flux is generated. A projection 18 for fitting is formed on the upper surface of the headset 1, and an earphone unit 13 is formed on the lower surface on the opposite side. As shown in FIG. 16B, the key 30 and the headset 1 can be integrated with each other by the fitting recess 38 of the key grip 31 and the fitting protrusion 18 of the headset 1.

  As shown in FIG. 16C, a magnet 112 is included in the vicinity of the opening of the key hole 63 of the key cylinder 60 of the vehicle. By releasing the fitting by the fitting concave portion 38 and the fitting convex portion 18 and opening the headset and inserting a key into the key hole 63 of the key cylinder 60, the end portion 121a of the iron core 120 and the cylinder 60 are The iron core 111 comes into contact, and the end 121b of the iron core 120 and the end 131 of the iron core of the headset come into contact. In this state, the headset 1 is held by the key grip portion 31 by the magnetic force of the magnet 112.

  In the state shown in FIG. 16C, when the mobile phone receives an incoming call, the headset 1 receives the current and the current flows through the coil 135 in a direction that weakens the attractive force of the magnet 112, so that the headset 1 can be easily removed.

  FIG. 17 shows an embodiment of a holding structure using a slide-type magnet. As shown to (a), the key holding part 31 contains the two iron cores 120 in the shape of a U-shape. An end 121 b of the iron core 120 that contacts the headset 1 is exposed on the lower surface of the key grip portion 31. The headset 1 includes a coil 135. And as shown to (a) and (b), the engagement rail 35 is formed in the lower surface of a key holding part, and the engagement groove | channel 17 is formed in the upper surface side of a headset. By the engagement rail 35 and the engagement groove 17, the key grip portion 31 and the headset 1 can be integrated.

  When inserting the key into the key cylinder of the vehicle, the headset 1 is slid as shown in FIG. 17C so that the iron core 120 of the key gripping portion 31 and the coil 135 of the headset 1 are in contact with each other. When the key is inserted into the key cylinder, the headset 1 is firmly held against the key 30 by the magnetic force of the magnet 112 included in the key cylinder. As in the above-described embodiment, when a mobile phone is received, the headset 1 receives the current and the current flows through the coil 135 in a direction that weakens the attractive force of the magnet 112, so that the headset 1 can be easily removed.

  Furthermore, FIG. 18 shows an embodiment of a holding structure using a rotating slide type magnet. As shown in (a), an iron core 120 is provided inside the key grip portion 31. (A) is a folded state in the case of carrying. And when inserting a key into the key cylinder of a vehicle, as shown in (b), the headset 1 is rotated 180 degrees with respect to the key 30 to insert the key portion 45 into the key cylinder. Is possible. When the key 30 is inserted into the key cylinder, the coil 135 in the headset is attracted by the magnetic force of the magnet 112 in the key cylinder, so that the headset is not easily detached from the key. As in the previous embodiment, when a mobile phone call arrives, the headset 1 receives and current flows in the coil in a direction that weakens the attractive force of the magnet 112, making it easier to remove the headset, as shown in FIG. Can be separated.

  In addition, instead of a rechargeable battery, a headset battery or the like may be included in the headset 1 so that charging is not performed. Further, it may be configured such that a call can be made by separating the headset from the key without forming a call button on the headset.

The block diagram for demonstrating the whole system configuration. An example of a hands-free device in which a headset and a key are integrated. The figure which shows the usage example of a headset. Example 2 of a hands-free device in which a headset and a key are integrated. Example 3 of a hands-free device in which a headset and a key are integrated. An embodiment of a hands-free device of a rotary folding type in which a headset and a key are integrated. An example of a slide-type hands-free device in which a headset and a key are integrated. The figure explaining slide and separation of a slide type hands-free device. An embodiment of a rotary slide type hands-free device in which a headset and a key are integrated. The figure explaining the slide and separation of a rotation slide type hands-free device. The figure explaining charge of a charging part. The figure explaining rotation folding type charge. The figure explaining slide-type charge. The figure explaining rotation slide type charge. The figure explaining the holding structure using a magnet. The figure explaining the holding structure using a fitting type magnet. The figure explaining the holding structure using a slide-type magnet. The figure explaining the holding structure using a rotation slide type magnet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Headset 3 Microphone 13 Earphone 30 Key 31 Key holding part 45 Key part 60 Key cylinder 63 Key hole 61 Terminal 66 Conductor 75 Terminal 69 Battery 91 Mobile phone 112 Magnet 120 Iron core 135 Coil

Claims (10)

A wireless communication device including a communication unit that performs wireless communication with a mobile terminal that performs communication via a telephone communication network, an earphone unit that is inserted into an ear hole and listens to sound, and a microphone unit that inputs sound;
The wireless communication device is integrated with the wireless communication device in a separable state and includes a key for starting a vehicle engine, and the earphone portion of the wireless communication device separated from the key is inserted into an ear hole, thereby the wireless communication device A hands-free device in which the communication unit performs communication via the telephone communication network by performing wireless communication with the portable terminal in a state where the device is worn on the ear. A key cylinder provided in the vehicle having a keyhole of a key for starting the engine of the vehicle, and a first terminal connected to the battery of the vehicle in the vicinity of the opening of the keyhole;
Electricity is charged by the battery, a communication unit that performs wireless communication with a mobile terminal that performs communication via a telephone communication network, an earphone unit that is inserted into an ear hole to listen to voice, a microphone unit that inputs voice, and the battery A wireless communication device including: a charging unit to be connected; and a second terminal that is electrically connected to the charging unit and electrically connected to the first terminal;
A key portion that is inserted into the key hole of the key cylinder, and a conductor portion that enables electrical connection between the first terminal of the key cylinder and the second terminal of the wireless communication device. And a key that is separable from the wireless communication device and that starts a vehicle engine, and the wireless communication device and the key are integrated into the keyhole. The charging unit is charged by the battery when the unit is inserted, the wireless communication device is separated from the key, and the earphone unit is inserted into the ear hole to attach the wireless communication device to the ear A hands-free device, wherein the communication unit performs communication via the telephone communication network by performing wireless communication with the portable terminal. The key cylinder includes a magnet near the opening of the key hole of the key,
The wireless communication device includes a metal body with an exposed end, and a coil that is formed on the metal body and through which an electric current flows by an incoming signal from the mobile terminal,
The key grip portion of the key includes a key metal body for holding the radio communication device by transmitting the magnetic force of the magnet to the metal body of the radio communication device,
When the key is inserted into the key cylinder, the wireless communication device is held via the key gripping portion by the magnetic force of the magnet, and when there is an incoming signal from the portable terminal, a current is passed through the coil. The hands-free device according to claim 2, wherein a holding force by the magnet is weakened, and the wireless communication device can be easily separated from the key.   4. The hands according to claim 1, wherein a main body including the communication unit of the wireless communication device has a box shape, and the earphone is formed so as to protrude from one surface of the main body. Free device.   The hands-free device according to any one of claims 1 to 4, wherein the wireless communication between the wireless communication device and the mobile terminal is a short-range wireless communication based on Bluetooth.   The wireless communication device includes an elastically deformable claw portion for coupling with the key, and release means for releasing the coupling, and the wireless communication device and the key are integrated by the claw portion. The hands-free device according to claim 1, wherein the wireless communication device is separated from the key to make a call.   One of the wireless communication device or the key has a fitting portion, and the other has a fitted portion that fits the fitting portion, and is fitted by the fitting portion and the fitted portion. The hands-free device according to any one of claims 1 to 5, wherein the hands-free device is integrated and makes a call by separating the wireless communication device from the key.   The wireless communication device or the key has a magnet on one side and a metal piece or magnet on the other, the key and the wireless communication device are integrally coupled by the magnetic force of the magnet, and the wireless communication device is separated from the key The hands-free device according to any one of claims 1 to 5, wherein a telephone call is made.   A slide rail is provided on one surface of the radio communication device or the key, and a rail groove that engages with the slide rail is provided on the other surface, and the radio communication device is configured by the slide rail and the rail groove. The hands-free device according to any one of claims 1 to 5, wherein the key and the key are integrated, and the wireless communication device is slid to separate the key from the key. The earphone part protruding from one surface of the wireless communication device has a rotating shaft part,
The key includes a rotary shaft recess for fitting the rotary shaft portion to rotate the wireless communication device around the rotary shaft portion, and removing the rotary shaft portion from the rotary shaft recess. The hands-free device according to any one of claims 1 to 5, wherein a call is performed by separating a wireless communication device from the key.

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