JP3763995B2 - Mobile phone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile phone having a hands-free function for making a call without holding the mobile phone, and more particularly to an improvement in the installation position of a hands-free speaker for realizing a clear call.
[0002]
[Prior art]
Conventionally, a mobile phone having a hands-free function has been provided with a hands-free speaker on the back rather than the front of the mobile phone main body having a liquid crystal display unit and an operation unit due to space limitations of the mobile phone. In particular, when the mobile phone system is to be used as a so-called videophone for transmitting and receiving image information, it is desirable to further increase the size of the liquid crystal display unit, and in this case, restrictions on the space of the mobile phone are further increased. Is inevitable.
[0003]
[Problems to be solved by the invention]
However, if a hands-free speaker is provided on the back side of the mobile phone, the sound output direction is on the opposite side to the operator, so that the directivity of the received sound spreads backward and the clarity is reduced. there were.
[0004]
The present invention solves the above-described problems, and even a mobile phone having a limited front area, particularly a mobile phone provided with a large liquid crystal display unit for use as a videophone, has a clear received sound. An object is to provide a mobile phone.
[0005]
[Means for Solving the Problems]
A mobile phone of the present invention that solves the above problems includes a display unit (4), a plurality of operation keys (11), a reception speaker (3), and a microphone (9 ) In the front of the housing (1) is provided with a hands-free speaker (8) that outputs sound when used hands-free and is attached by a slide mechanism that slides along the front of the housing The lid portion (7) and the lid portion are in a first state covering the operation keys, or in a second state where the operation keys can be operated, or the lid portion is the receiving speaker 3 A mode detection unit (12, 13) for detecting whether or not the mobile phone is in the third state, and when the first state is detected by the mode detection unit, the reception sound is reproduced by the hands-free speaker. Check the state of 2 A speaker switching unit (16) that reproduces the received sound by playing the received sound by the receiving speaker, and reducing the volume of the hands-free speaker to a volume equivalent to the received speaker when the third state is detected; It is characterized by comprising.
[0006]
In the device configured as described above, the hands-free speaker 8 is configured to be positioned in front of the housing 1 with the lid 7 covering the operation key 11. When the received sound is reproduced at 8, the sound is output toward the direction in which the ear of the normal receiver is located in the hands-free state. Therefore, the received sound is reproduced clearly.
[0009]
In the apparatus configured as described above, the reception sound is reproduced by the hands-free speaker 8 when the cover portion 7 covers the operation key 11, and the reception sound is received by the reception speaker 3 when the operation key 11 is opened within the operable range. Can be automatically switched between a hands-free and a normal mobile phone.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1A and 1B are perspective views illustrating a first embodiment of the present invention, in which FIG. 1A shows a state in which a lid 7 is opened and an operation key 11 can be operated, and FIG. The state which covers is shown. This mobile phone has a hands-free call function and can make full-duplex or half-duplex calls. In the figure, the housing 1 has a substantially rectangular shape, has an antenna 2 on the upper side, a reception speaker 3, a liquid crystal display unit 4, a call key 5, an end key 6, an operation key 11, a microphone 9 on the front side. And a hinge 10 that pivotally supports the lid portion 7 is provided at the lower end portion of the front surface. In the lid portion 7, the pin 12 is provided on the surface facing the operation key 11, and the hands-free speaker 8 is provided on the surface that appears on the front surface of the housing with the operation key 11 covered by the lid portion 7. A small hole 15 that engages with the pin 12 in a state where the lid portion 7 covers the operation key 11 is provided in the lower left edge portion of the housing 1 to which the operation key 11 is attached.
[0011]
The antenna 2 performs communication between the mobile phone and the base station using radio waves in a specific frequency band. The reception speaker 3 generates a sound volume suitable for reproducing the reception sound as a normal mobile phone. The liquid crystal display unit 4 displays the telephone number input with the operation key 11 and the destination telephone number at the time of incoming call. The call key 5 is pressed by the caller when starting a call on the mobile phone. The call end key 6 is pressed by the caller when ending the call. The lid portion 7 is closed to cover the operation key 11 or opened to a state where the operation key 11 can be operated.
[0012]
The hands-free speaker 8 generates a sound volume suitable for reproducing the received sound as a hands-free portable device, and outputs a louder sound volume than the receiving speaker 3. The microphone 9 converts the voice uttered by the caller into an electrical signal, and always faces the front regardless of whether the lid 7 is opened or closed. The hinge 10 pivotally supports the lid portion 7 so as to be openable and closable with respect to the main body 1. The operation keys 11 have numeric keys for inputting a destination telephone number and control keys. Here, a total of 16 keys of 4 rows and 4 columns are arranged. The pin 12 and the small hole 15 are used to detect whether the lid portion 7 covers the operation key 11 or is open so that the operation key 11 can be operated.
[0013]
FIG. 2 is a cross-sectional view of the main part of the apparatus shown in FIG. 1 and shows a mechanism for detecting whether the lid 7 covers the operation key 11 or opens the operation key 11 in an operable state. In the figure, the key operation unit housing 14 has a small hole 15 on the surface on which the operation keys 11 are provided. Since the switch 13 is provided inside the key operation unit housing 14 of the small hole 15, it outputs an on / off signal depending on whether or not it is pressed by the pin 12. In accordance with the on / off signal sent from the switch 13, the speaker switching unit 16 selects the hands-free speaker 8 when the lid 7 covers the operation key 11, and opens so that the lid 7 can operate the operation key 11. If so, the receiving speaker 3 is selected.
[0014]
Next, the operation of the apparatus configured as described above will be described. First, the operation at the time of an incoming call will be described. When a call is received during standby with the lid 7 covering the operation key 11, the caller presses the call key 5. Then, the hands-free speaker 8 is selected by the speaker switching unit 16, and a call is received in the hands-free state, sound is heard from the hands-free speaker 8, and sound is not heard from the receiving speaker 3. In this state, when the lid 7 is opened, a call is received in a normal call state, sound is heard from the receiving speaker 3, and sound from the handsfree speaker 8 is stopped.
[0015]
Next, when the lid 7 is open so that the operation key 11 can be operated, the caller presses the call key 5 when a call is received during standby. Then, the receiving speaker 3 is selected by the speaker switching unit 16, and a call is received in a normal call state, and sound is heard from the receiving speaker 3, and sound is not heard from the handsfree speaker 8. In this state, when the lid portion 7 is closed, a call is received in a hands-free state, sound is heard from the hands-free speaker 8, and sound from the receiving speaker 3 is stopped.
[0016]
Next, the operation during a call will be described. When the lid 7 is opened during a call in the hands-free state, the normal call state is entered. On the contrary, when the lid 7 is closed during a call in a normal call state, the call state is shifted to a hands-free state.
Next, the operation at the end of the talk will be described. Even in a hands-free state or a normal call state, when the call end key 6 is pressed, the call ends.
[0017]
Next, the operation at the time of calling will be described. In both the state in which the lid 7 covers the operation key 11 and the state in which the operation key 11 can be operated, a call is made when the call key 5 is pressed during standby.
[0018]
FIG. 3 is a structural perspective view for explaining a second embodiment of the present invention. The components different from those in FIG. 1 will be described. In this embodiment, a sliding type sliding lid 17 is provided instead of the opening / closing lid 7 using the hinge 10. The sliding lid portion 17 slides in the longitudinal direction of the front surface of the housing along the guide groove 18 provided on the side surface of the housing 1 and is provided with a hands-free speaker 8.
[0019]
In the apparatus configured as described above, when the hands-free speaker 8 is selected when the sliding lid 17 covers the operation key 11 and the sliding lid 17 is open so that the operation key 11 can be operated. The receiving speaker 3 is selected. In addition, when the slide-type lid 17 is configured to cover the receiving speaker 3 when the slide-type lid 17 is open so that the operation key 11 can be operated, the volume of the hands-free speaker 8 is set to be low. The volume may be reduced to a volume equivalent to the receiving speaker 3.
[0020]
In the embodiment shown in FIG. 1, there is a configuration in which detection of whether the lid is in a state of covering the operation key or in a state where the operation key is open is detected using a pin and a switch. Although shown, the present invention is not limited to this, as long as it can detect the positional relationship between the lid and the operation keys, such as a proximity switch such as an optical type such as a photocoupler or a capacitance type. That's fine.
[0021]
In the above embodiment, the structure of the voice-only cellular phone is shown. However, the present invention is not limited to this, and may be used for a cellular phone. In the mobile phone for videophone, a camera is installed instead of the reception speaker 3, the image of the other party is displayed on the liquid crystal display unit 4, and the other party's voice is uttered from the handsfree speaker 8.
[0022]
In the case of a cellular phone for a video phone, PHS (Personal Handyphone System) has a digital transmission rate of 32 kbps. Therefore, if 8 kbps is assigned for audio information, 24 kbps can be assigned for image information. In the case of 24 kbps, since image transmission of 2 screens can be performed per second, considering that commercial television broadcasting is 30 screens per second, it can withstand practical use as a videophone. Here, in the case of a cellular phone for videophones, a CCD camera and a large-screen liquid crystal display unit for image display are required as compared with conventional cellular phones for voice, and inevitably in a cellular phone having a limited area. Since it is difficult to provide a hands-free speaker on the front surface of the mobile phone body, it is extremely effective to install a hands-free speaker on the lid of the video phone mobile phone as in this embodiment.
[0023]
【The invention's effect】
As described above, according to the mobile phone of the present invention, the hands-free speaker is configured to be positioned in front of the housing with the cover portion covering the operation key. When listening to the received sound, the sound is output toward the direction in which the listener's ear is normally positioned in the hands-free state, so that the received sound is clearly reproduced, especially in a limited area. It is suitable for use in a mobile phone having a large number of functions.
In addition, there is a specific effect that the user can select between a hands-free call and a normal call by sliding the lid that forms a part of the telephone case, and the caller's operation is simplified.
[Brief description of the drawings]
FIG. 1 is a structural perspective view for explaining a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of the apparatus shown in FIG.
FIG. 3 is a structural perspective view for explaining a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 2 Antenna 3 Reception speaker 4 Liquid crystal display part 7 Cover part 8 Hands-free speaker 9 Microphone 10 Hinge 11 Operation key 12 Pin 15 Small hole 16 Speaker switching part

Claims (1)

  A display unit (4), a plurality of operation keys (11), a reception speaker (3), and a microphone (9) for converting voice uttered by a caller into an electrical signal are provided on the front of the casing (1). In the mobile phone having
  A hands-free speaker (8) for outputting sound when hands-free is used, and a lid (7) attached by a slide mechanism that slides along the front of the housing;
  Whether the lid is in a first state covering the operation key, in a second state where the operation key is open to an operable range, or whether the lid is in a third state covering the reception speaker 3 , A mode detection unit (12, 13) for detecting
  When the first state is detected by the mode detection unit, the reception sound is reproduced by the hands-free speaker, and when the second state is detected, the reception sound is reproduced by the reception speaker.
A speaker switching unit (16) for reproducing the received sound by reducing the volume of the hands-free speaker to a volume equivalent to the received speaker when the third state is detected;
A mobile phone comprising:

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