KR20020011488A - Receiver-loud part integrating speaker and mobile phone including the same - Google Patents

Abstract

PURPOSE: A dual speaker combining a receiver with a loud speaker is provided to be mounted on a mobile communication terminal, and to select receiver and loud speaker functions, so as to reduce a cost and handset size. CONSTITUTION: A loud speaker(30) comprises a loud frame(31), a first magnet(32), a first voice coil(33), and a first diaphragm(34). The first magnet(32) is fixed as ring-shaped on one side of the frame(31). The first voice coil(33) is ring-shaped inside of the first magnet(32). The first diaphragm(34) is connected to the first voice coil(33) and is arranged between an inner side of the loud frame(31) and the first magnet(32). A receiver speaker(40) comprises a receiver frame(41), a second magnet(42), a second voice coil(43), and a second diaphragm(40). The receiver frame(41) arranged in other side of the loud frame(31) is circular-shaped, and is smaller than the loud frame(31) in diameter. The second magnet(42) is circular-shaped, and is fixed on the center of the receiver frame(41). The second voice coil(43) surrounds the second magnet(42). The second diaphragm(44) connected to the second voice coil(43) is arranged between the inner side of the receiver frame(41) and the second magnet(42).

Description

Receiver-loud part integrating speaker and mobile phone including the same}

The present invention relates to a voice signal input and output unit of a cellular phone, and more particularly, to a mobile communication terminal having a dual speaker structure in which a receiver and an external loudspeaker of the cellular phone are integrated.

In a conventional cellular phone, when a user speaks to a cellular telephone (microphone) to make a call, an electrical signal generated by the microphone is transmitted to a counterpart communication device through a processor such as a predetermined modulation and amplification. The other party's cellular phone receives and modulates the transmitted signal, generates an analog voice signal, and outputs it to the user through the receiver.

Recently, mobile phones have been developed to enable so-called "speaker phone" calls by including external loudspeakers in addition to the receiver which is a small speaker of a cellular phone. The call of the "speaker phone" is made by the voice of the talker being input to the microphone of the cellular phone, and the received signal is converted into a voice signal and output to the external loudspeaker. Therefore, the user can talk while listening to the call through the loudspeaker at a certain distance without placing the cellular phone on the ear.

Such a cellular phone including an external loudspeaker is disclosed in Korean Patent Application No. 1996-056712. In the above-described invention, a loudspeaker for converting a voice into an electrical signal, a loudspeaker for outputting an applied voice signal, a signal amplification unit generally used to make a high band signal while preventing aliasing of the signal, The audio processing unit includes a signal modulator, an aliasing remover, a high frequency filter unit, and a signal processor. A feature of the invention described above is that, unlike conventional cellular phones, external loudspeakers and / or microphones are mounted.

Recently, many accessories are being developed to hold a mobile phone and make a call freely without being in close contact with an ear, and one of them is a hands-free set such as an earphone-type earset. In addition, as in the aforementioned patent invention, the cellular phone is equipped with an external speaker (and an external microphone), and the user can send and receive voice using an external speaker (and an external microphone) even when the user is away from the mobile phone. The phone is being developed. The cellular phone is provided with an external loudspeaker in addition to a typical cellular phone configuration, and the user can arbitrarily make both a call using a receiver and a speakerphone call using an external loudspeaker in a state in which the cellular phone is in close contact with the ear by a predetermined switching operation. To be.

However, the loudspeaker, which is relatively larger than the receiver, needs to be additionally installed for the speakerphone call, thereby increasing the manufacturing cost of the cellular phone and increasing the size (volume) of the terminal.

The present invention is conceived to compensate for the shortcomings of the conventional cellular phone having a speakerphone function, and is intended to reduce the manufacturing cost and volume by integrally forming the receiver and the external loudspeaker.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile communication terminal that enables a call without being in close contact with an ear without using additional accessory equipment.

Another object of the present invention is to provide a double-speak system of a type in which a receiver (small capacity speaker) and a loudspeaker are integrally integrated.

Still another object of the present invention is to provide a speakerphone call function mobile communication terminal which can be manufactured relatively inexpensively and has a small volume by using the above-described dual speaker system.

1 is a block diagram showing the internal configuration of a typical conventional cellular phone.

Figure 2 shows an embodiment of a receiver-loudspeaker integrated dual speaker according to the present invention, Figure 2a is a perspective view, Figure 2b is a sectional view.

3 is a block diagram showing the internal structure of a cellular phone having a dual speaker integrated receiver-loudspeaker according to the present invention.

FIG. 4 shows a dual speaker arranged in a folder type cellular phone, FIG. 4A shows a folder open, and FIG. 4B shows a folder closed.

In order to achieve the object of the present invention as described above, there is provided a receiver (small capacity speaker) -loudspeaker integrated dual speaker and a mobile communication terminal including the same.

The receiver-loudspeaker integrated dual speaker according to the present invention includes a cylindrical loudspeaker frame, a first magnet fixed in an annular shape to one surface of the inside of the frame, a first voice coil disposed in an annular shape inside the first magnet; A loudspeaker unit connected to the first voice coil and comprising a first diaphragm disposed between the inner surface of the loudspeaker frame and the fixed first magnet, and a diameter fixed to one side of the loudspeaker frame and smaller than the loudspeaker frame. A cylindrical receiver frame having a cylindrical shape, a cylindrical second magnet fixed to a center of one surface of the inside of the receiver frame in a fixed direction of the first magnet, an annular second voice coil disposed to surround the second magnet, and It is connected to the second voice coil and the other inner surface of the receiver frame 2, the receiver part consists speaker consisting of the second diaphragm is disposed between a magnet. Here, the second voice coil and the second diaphragm each have a smaller diameter than the first voice coil and the first diaphragm.

The above-mentioned loudspeaker frame is formed of a closed frame having a cylindrical groove having a predetermined diameter in a lower portion, and the receiver frame is a closed frame composed of a cylindrical cover having a diameter larger than that of the cylindrical frame and the groove covering the cylindrical groove and smaller than the loud frame. The second magnet and the second voice coil may be arranged inside the cylindrical groove.

On the other hand, there is provided a mobile communication terminal including the above-described receiver-loudspeaker integrated dual speaker, and dual speaker selection switching unit for selectively operating only one of the receiver speaker and the loudspeaker of the dual speaker. The mobile communication terminal selectively activates the receiver unit and the loudspeaker unit among the dual speakers according to a user's (button) selection or opening / closing of a folder (or flip), thereby enabling both general in-house or speakerphone calls.

The mobile communication terminal in the present invention is a concept including all portable equipment capable of voice communication with other users, such as a general mobile phone (cellular phone), PCS phone, personal digital assistant (PDA), IMT-2000 terminal, satellite communication terminal.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of a receiver-loudspeaker integrated dual speaker and a cellular phone as a mobile communication terminal comprising the same.

1 is a block diagram showing the internal configuration of a typical cellular phone.

The internal structure of the cellular phone excluding the housing is, as shown in FIG. 1, a high frequency amplifier 11, a transmission frequency synthesis circuit 13, a reception frequency synthesis circuit 12, a demodulator 14, a modulator 15, and an audio processor 16. ), A PCB circuit unit 10 including a control unit 17, an antenna 23 connected to the PCB circuit unit, a receiver speaker 18, a microphone 19, a keypad 20, and an LCD display 21. .

Briefly describing the communication flow using the mobile phone, when the user inputs a telephone number using a key operation of the keypad 20, the user transmits a signal to the relay station through the antenna 23. When connected with the other party, the talker's voice is converted into an electric signal through the microphone 19, and the audio processor 16 applies the modulator 15 to the modulator 15 so that the signal is modulated. synthesis circuit) to synthesize a high frequency output. The synthesized high frequency output is amplified by the high frequency amplifier 11 and then transmitted using the antenna 23.

The signal received at the antenna from the relay station is amplified by the high frequency amplifier 11 and converted into a baseband signal by the reception frequency synthesizing circuit 12. The baseband signal is demodulated by a demodulator 15 and then delivered to the audio processor 16. The audio processor outputs voice through the speaker 18 so that the other party's voice can be heard.

Of the above components, the transmit / receive frequency synthesis circuits 12 and 13, the audio processor 16, and the controller 17 are composed of various sub-components, and the description of the configuration of such a cellular phone is generally known. Since it is present in the specification, detailed description thereof will be omitted.

Figure 2 shows an embodiment of a receiver-loudspeaker integrated dual speaker according to the present invention, Figure 2a is a perspective view, Figure 2b is a sectional view.

A general speaker is composed of a ring-shaped magnet (magnet), an annular voice coil disposed inside or outside the magnet, and a diaphragm (or vibration cone) connected to the voice coil. There are magnets inside or outside the voice coil so that the voice coil is inside the magnetic field generated by the magnets. In this state, when an electrical signal is applied to the coil, current flows in the coil. The magnetic moment generated in the voice coil by the current and the magnetic field by the magnets interact to move the voice coil up and down (or left and right), and the diaphragm fixed to the voice coil vibrates together to cause the vibration. Audio (or sound) is output. In addition, a damper may be further provided to increase the responsiveness of the vibration and to prevent the vibration plate from abnormally vibrating.

In the case of the dual speaker according to the present invention shown in Figure 2 also uses the general principle of such a speaker, as shown in Figure 2a comprises a loud (loud) speaker unit 30 and the receiver speaker unit 40, the overall Two cylindrical speakers of different sizes are bonded to each other.

FIG. 2B is a cross-sectional view taken along line aa of FIG. 2A, and the loudspeaker unit 30 has a closed loudspeaker frame 31 having a cylindrical groove formed at a lower portion thereof, and an annular shape fixedly attached to a lower surface of the loud frame while surrounding the cylindrical groove. It consists of a first magnet 32 of, a first annular first voice coil 33 and a first diaphragm 34 attached to the first voice coil disposed between the side of the cylindrical groove and the first annular magnet.

In addition, the configuration of the receiver speaker unit 40 is as follows. The cylindrical cover, which is larger than the diameter of the cylindrical groove of the loud frame and smaller than the overall diameter of the loud frame, has an open cylindrical cover on one side. A portion of this cylindrical cover and loudspeaker frame forms a closed receiver frame 41. In the cylindrical groove in the receiver frame 41, a second magnet 42 is fixed to the bottom, and an annular second voice coil 43 is arranged in a shape surrounding the second voice coil, and a second diaphragm ( 44) is attached.

As shown in FIG. 2B, the first diaphragm is forced upwards and the second diaphragm is forced downward by appropriately selecting the polarity direction of the magnets and the direction of the current flowing through the voice coil in the loudspeaker unit and the receiver speaker unit. Get strength.

Fig. 3 is a block diagram showing the internal structure of a cellular phone having a dual speaker of a receiver-loudspeaker integrated type according to the present invention instead of a conventional receiver speaker (receiver).

Similar to FIG. 1, the high frequency amplifier 111, the transmission frequency synthesis circuit 113, the reception frequency synthesis circuit 112, the demodulator 114, the modulator 115, the audio processor 116, the control unit 117, a dual PCB circuit unit 100 including a dual speaker selection switching unit 140 for selectively controlling the operation of the speaker, an antenna 123 connected to the PCB circuit unit, receiver-loud speaker integrated dual speaker 140 according to the present invention ), A microphone 119, a keypad 120, and an LCD display 121. The difference from the conventional cellular phones is that the dual speaker 140 is used instead of the general receiver speaker and the dual speaker selection switching unit 130 for controlling the operation of the dual speaker is additionally provided in the PCB circuit.

The dual speaker selection switching unit 130 selectively drives one of the loud speaker unit and the receiver speaker unit of the dual speaker according to a user's selection or opening and closing of a folder (or flip).

As shown in FIG. 4, the dual speaker is mounted on the upper folder of the folder-type cellular phone, and the receiver speaker is disposed to face the inside of the folder. If the upper folder is open, the user is trying to make an intimate call, so the selective switching unit detects the opening of the folder and then turns on only the receiver speaker unit by switching (S), and turns off the loudspeaker unit ( 4a). On the contrary, when the folder is closed, the user is trying to make a speakerphone call, so that the loudspeaker unit is turned on during the call and the receiver speaker unit is turned off (Fig. 4b). To this end, the dual speaker selection switching unit 130 or the control unit 117 should be able to detect the opening and closing of the folder in the case of the operation by opening and closing of the folder, such folder (or flip) opening and closing recognition is hinged. This can be achieved by using a suitable device.

The receiver-loudspeaker integrated dual speaker according to the present invention is mounted on a mobile communication terminal such as a cellular phone, and the receiver function and the loudspeaker function of the dual speaker are selected according to the opening and closing of the folder, thereby making the cellular phone further having the speakerphone function. Can provide.

In addition, by adopting an integrated dual speaker as a speaker of the cellular phone according to the present invention, it is possible to reduce the manufacturing cost as compared to a cellular phone having a conventional speakerphone function separately provided with a receiver speaker and an external loudspeaker. The size (volume) of the cellular phone handset can be greatly reduced.

Claims (5)

A loudspeaker frame 31, a first magnet 32 that is annularly fixed to one surface of the inside of the frame, a first voice coil 33 annularly disposed inside the first magnet, and the first voice A loudspeaker unit 30 connected to the coil and comprising a first diaphragm 34 disposed between the inner other surface of the loudspeaker frame and the fixed first magnet; A cylindrical receiver frame 41 disposed on the other side of the loud frame 31 and having a diameter smaller than that of the loud frame, and a cylindrical second fixed to a center of one surface of the inside of the receiver frame in a fixed direction of the first magnet; A magnet 42, an annular second voice coil 43 disposed to surround the second magnet, and a second connected to the second voice coil and disposed between an inner surface of the receiver frame and a second magnet; Receiver-loudspeaker integrated dual speaker consisting of; receiver speaker portion 40 composed of a diaphragm 44. The method of claim 1, The loud frame 31 is formed as a closed frame having a cylindrical groove of a predetermined diameter in the lower portion, the receiver frame is a closed frame consisting of a cylindrical cover of a diameter larger than the cylindrical frame and larger than the groove covering the cylindrical groove. , And the second magnet (42) and the second voice coil (43) are arranged inside the cylindrical groove. The method according to claim 1 or 2, And the second voice coil (43) and the second diaphragm (44) have a smaller diameter than the first voice coil (33) and the first diaphragm (34), respectively. PCB 100 including a high frequency amplifier 111, a transmission frequency synthesis circuit 113, a reception frequency synthesis circuit 112, a demodulator 114, a modulator 115, an audio processor 116, a control unit 117, In the mobile communication terminal consisting of an antenna 123, a receiver speaker, a microphone 119, a keypad 120, a housing Dual speaker 140 according to claim 1 mounted in place of the receiver bus picker; And a dual speaker selection switching unit (130) included in the PCB to selectively drive one of the loud speaker unit and the receiver speaker unit of the dual speaker. The method of claim 3, wherein The dual speaker selection switching unit 130 detects the opening and closing of one of the flip and the folder of the mobile communication terminal, Activate only the receiver speaker 40 when one of the flip and folder of the mobile communication terminal is opened; And only one of the loudspeaker units (30) is activated when one of the flip and folders of the mobile communication terminal is closed.