On hand-free receiver architecture of a cellular phone

An improvement on hand-free receiver architecture of a cellular phone, having an adequately sized shielding body; in the outside of shielding body a connecting part is configured, and in the inside of shielding body a battery and a circuit board are configured; provided in the periphery of shielding body are a power switch connected to the circuit board, a microphone, an earphone hole, a power input hole, and an antenna. The connecting part is used to tie the shielding body with a speaker device of the cellular phone so that a sound wave signal through the microphone is changed into an electrical signal, and an information through a signal processing circuit, as the shielding body coupled to the circuit board, is changed into a radio wave (frequency-modulated (FM) wave or amplitude-modulated (AM) wave, and finally the radio wave is transmitted out via the antenna and, therefrom, the information is output through the receiving of radio to implement a high performance of hand-free receiver.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1 and FIG. 2 , the present invention generally provides an adequately sized shielding body 10 ; provided in the back side of the shielding body 10 is a clip part 11 ; provided both in the opening of clip 11 and in the corresponding clip part of shielding body 10 is a soft pad, wherein individually installed in a suitable position on the shielding body 10 are a microphone, a power input insertion hole, an earphone hole, an antenna hole, a switch hole, and a power indicating lamp hole, and within the shielding body, a battery 19 and a circuit board 20 . Organized into a signal processing circuit on a circuit board 20 are multi-resistors, an inductor, a transistor, a diode, a voltage-regulated IC 21 , a quartz oscillator 22 , a power switch 23 , an LED 24 , an antenna 25 , a power input outlet 26 , an earphone socket 27 , and a microphone 28 , as shown in FIG. 3 , wherein the above-shown power switch 23 , LED 24 , antenna 25 , power input socket 26 , earphone socket 27 and microphone 28 are, for the assembly of the invention, respectively installed in a switch hole of the shielding body 10 , a power indicating lamp hole, an antenna hole, a power input hole, an earphone hole, and a microphone hole. Referring to FIG. 4 and FIG. 5, a clip part 11 provided in the back side of shielding body 10 of the invention is used to clip a voicing device 31 of a cellular phone 30 , which makes a microphone 28 stacked on the voicing device; a soft pad 12 is fixed in both a clip part 11 and a correspondingly clipped area of shielding body to prevent a cellular phone 30 from being damaged when clipped. A battery 19 built in the shielding body 10 may regularly supply the circuit 20 with power to benefit users when staying in a site without a power supply. When a power switch 23 is switched ON, a circuit board 20 turns ON and an LED lights, while a voltage-regulated IC 21 provides a regular voltage, in which a signal introduced from a microphone 28 is amplified by a transistor and meanwhile a quartz oscillator 22 oscillates a carrier wave loading an amplified signal and sends out said frequency-modulated wave through an antenna 25 . Users staying in vehicles 40 only locate the cellular phone 30 in a proper site; the microphones of the current cellular phones have a wide-range (around 80 cm) acoustics so that said information may be sent out by way of the radio and through the speaker, of a vehicle, to reach the performance of hand-free receiver. Furthermore, if a battery 19 runs out of power, a power input outlet 26 is additionally provided in the shielding body 10 to allow a power plug with a lighters socket 41 to be plugged for the other supply source of electricity. If what a user talks is not expected to be heard by the other passengers in the car, a power switch 23 can be switched OFF, which disables the circuit to work, and a normal earphone can be inserted into an earphone socket 27 so that the cellular phone forms a hand-free receiver structured with an earphone line. Still referring to FIG. 6 , if a user is generally situated indoors, a normal radio 50 may be used as a receiver of a cellular phone 30 to receive the information sent by the cellular phone 30 and to transmit out the information through its speaker for the use of hand-free receiver architecture not confined in a car 40 but widened in range. Below shown are the advantages of the improved hand-free receiver of cellular phone of the invention: 1. The volume of the device being decreased, a speaker of a radio is used as a megaphone of the device. 2. For the purpose of easy use and cost-saving consideration, the invention may be directly applied, not additionally through any connection, to a voicing device of a cellular phone. 3. A signal processing circuit is used to change a voice information into a radio wave (frequency-modulated (FM) wave or amplitude-modulated (AM) wave) so that once only a radio is provided, the performance of hand-free receiver can reach; therefore, the use in a car is not the only one. 4. The invention may transmit a sound wave signal using a radio speaker, and a general earphone also may be inserted to form a hand-free receiver architecture to benefit the invention with a secret tele-communication function. 5. The architecture of the invention is directly applied to a voicing device of a cellular phone, suitable to any other cellular phone to improve the conventional hand-free receiver architecture of resulting into a problem of a cellular phone only applicable to a connector for connection. From the description mentioned above, an improvement on hand-free receiver architecture of a cellular phone of the invention, for use, is a newly improved invention applicable to industries, not confined by any place or any phone model, and the invention having not yet exposed in any other publication, a new patent may be legally applied for an application category. While the invention has been described with reference to preferred embodiments, the description is illustrative of the invention and not to be construed as limiting the invention. Various modifications and applications may occur to those skilled in the art without departing from the true spirit and scope of the invention as defined in the appended claims.