CN2259034Y

CN2259034Y - Wireless earphone

Info

Publication number: CN2259034Y
Application number: CN 96214439
Authority: CN
Inventors: 王树军
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-07
Filing date: 1996-06-07
Publication date: 1997-08-06
Anticipated expiration: 2006-06-07

Abstract

The utility model relates to a wireless earphone for persons' listening on one player, which is no longer constrained by an earphone connecting line. The utility model solves the problem that one player constrained by an earphone connecting line can only be used for one person. The utility model is characterized in that the wireless earphone for persons' listening on one player comprises a transmitting apparatus and a receiving apparatus. The inside of the transmitting apparatus is provided with a circuit; an antenna (2), a plug (3), a switch (4), a sound head (5) and a battery cover (6) are arranged outside the transmitting apparatus. The inside of the receiving apparatus is provided with a receiving circuit; a battery cover (7), a switch (8) and an earpiece (10) are arranged outside the receiving circuit. The utility model has the advantages of small size, convenient use, practicality, and use for a plurality of persons at the same time. The utility model also has the advantages of being free from the constraint of a connecting line and not affecting other people.

Description

Many tins of wireless headsets of one machine

The utility model is a kind of many tins of wireless headsets of a machine that no longer are subjected to the constraint of earphone line.

Present earphone though also can receive program sound, is subjected to the constraint of earphone line, makes that people can only be movable under the length range constraint of line.And can only just listen by a machine, i.e. a set of headphones, a sounding body (television set, recorder etc.) can only use for a people.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and the constraint that provides a kind of listener in 50 meters scopes, no longer to be subjected to line, can be movable on one side, Yi Bian listen to program, do not influence other people many tins of wireless headsets of a machine.

The purpose of this utility model can realize by following measure:

Many tins of wireless headsets of one machine comprise emitter and receiving system, emitter shell (1) is the tetragonal body box, radiating circuit is housed in the box, the box dead ahead is provided with the plug (3) that links with sounding body (television set, recorder etc.) jack, and the box back side is provided with scalable, the pick-up (5) that rotates, the box top is provided with transmitting antenna (2), and the box right flank is provided with switch (4), and its lower end is provided with battery cover (6).Receiving system shell (9) is the soft shell of moulding of arch, and receiving circuit is housed in it, and its outside is provided with switch (8), and its lower end is provided with battery cover (7), and arch shell (9) two ends are connected to common headphones receiver (10).

The purpose of this utility model can also realize by following measure:

Battery below the battery cover (6) is as the power supply (1.5 ν) of emitter, its positive pole is through switch 4 (K1), resistance (R1, R2), electrochemical capacitor (1 μ/6.3 ν), triode (9013) and next electrochemical capacitor (1 μ/6.3 ν) that the signal low frequency amplifies, triode of the signal higher-order of oscillation (9018) and oscillating circuit LC are after ground capacity (10P) is connected on the antenna Tx.The negative pole of power supply (6) is connected on the corresponding ground wire of radiating circuit.

Battery below the battery cover (7) is as the power supply of receiving system, its positive pole and negative pole join, it another is anodal connects circuit by switch 8 (K2), inductance coil (inductance coil of available band iron stamen replaces antenna) through 390 μ H, variable capacitance C1, circuit board (LA 1800) connects the impedance matching transformer positive pole, and another negative pole of power supply (7) is connected to the negative pole of impedance matching transformer through circuit board (LA 1800).

Description of drawings is as follows:

Fig. 1 is the utility model emitter circuit theory diagrams.

Fig. 2 is the utility model receiving system circuit theory diagrams.

Fig. 3 is the utility model emitter profile schematic perspective view.

Fig. 4 is the utility model receiving system profile schematic perspective view.

Among the figure: 1, shell 2, transmitting antenna 3, plug 4, switch (K1) 5, pick-up 6, battery cover, 7, battery cover 8, switch (K2) 9, arch shell 10, receiver

The utility model is described in further detail below in conjunction with accompanying drawing.

With sounding body (television set, recorder etc.) sound is turned the volume that can not hear to ear down, the plug (3) of emitter is inserted the sounding body jack, at this moment the electret pick-up 5 (MIC) of the circuit of emitter (Fig. 1), voice signal is received, collect, through resistance R 1, after the frequency change of the current limliting of R2 and electrochemical capacitor (1 μ/6.3 ν), signal conducted carry out the signal low frequency to triode (9013) and amplify, signal after will amplifying again sends triode (9018) to after the frequency change of next electrochemical capacitor (1 μ/6.3 ν), carry out the higher-order of oscillation of signal, signal after modulation is imported the LC oscillating circuit once more, and (L is L1, C is the capacitor C of 12P) vibration, after ground capacity (10P) produces vibration with airborne free charge, electric antenna Tx sends signal.Emitter sends the inductance coil that signal is received device (Fig. 2) 390 μ H (inductance coil of available band iron stamen replaces antenna) and receives, produce resonance signal through variable capacitance C1, again through surface-mounted integrated circuit (LA1800), under the acting in conjunction of peripheral circuit, with the resonance signal that receives through detection, filtering, amplify, output adds an impedance matching transformer (V) at output side signal at last, makes impedance matching.Inserting common headphones (4 Ω or 8 Ω) receiver at last on these transformer the two poles of the earth gets final product.

The utlity model has following advantage:

Volume is little, and is easy to use, all very practical in family and public place. Can be not within 50 meters Be subjected to the constraint of line, can be movable on one side, Yi Bian listen to program, and don't affect other people.

Can a machine many tins, only with a sounding body, an emitter, only several pairs of need polygamy connect Device for tone frequencies can be accomplished many tins in a machine.

Claims

1, many tins of wireless headsets of an a kind of machine, it comprises emitter and receiving system.

It is characterized in that:

(a) the emitter shell is the tetragonal body box, radiating circuit is housed in the box, the box dead ahead is provided with the plug (3) that is connected with the sounding body jack, the box back side is provided with scalable, the pick-up (5) that rotates, the box top is provided with transmitting antenna (2), and the box right flank is provided with switch (4), and its lower end is provided with battery cover (6).

(b) receiving system shell (9) is the soft shell of moulding of arch, and receiving circuit is housed in it, and its outside is provided with switch (8), and its lower end is provided with battery cover (7), and arch shell (9) two ends are provided with common headphones receiver (10).

2, many tins of wireless headsets of an a kind of machine according to claim 1 is characterized in that:

Battery below the battery cover (6) is as the power supply (1.5 ν) of emitter, its positive pole is through switch 4 (K1), resistance (R1, R2) and electrochemical capacitor (1 μ/6.3 ν), triode and next electrochemical capacitor (1 μ/6.3 ν) that signal amplifies, triode of the signal higher-order of oscillation (9018) and oscillating circuit LC, after ground capacity (10P) is connected on the antenna Tx, the negative pole of power supply (6) is connected on the corresponding ground wire of radiating circuit.

3, many tins of wireless headsets of an a kind of machine according to claim 1 is characterized in that:

Battery below the battery cover (7) is as the power supply of receiving system, its positive pole and negative pole join, and it another is anodal by switch 8 (K2), through the inductance coil of 390 μ H, variable capacitance C1, circuit board (LA 1800) connects on the positive pole of impedance matching transformer.Another negative pole of power supply is connected on the negative pole of impedance matching transformer through circuit board (LA 1800).