CN201018651Y

CN201018651Y - Piezoelectric earphone equipped with audio output electrode control device

Info

Publication number: CN201018651Y
Application number: CNU2007201416236U
Authority: CN
Inventors: 李星
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-10
Filing date: 2007-03-10
Publication date: 2008-02-06
Anticipated expiration: 2017-03-10

Abstract

The utility model relates to a piezoelectricity type earphone with the audio frequency output electrode control device, which is to increase a set of audio frequency output electrode control device in the piezoelectricity potsherd electric circuit where the bullet is connected. The utility model comprises the sound track switch , the transformer , the human body contact electrode meeting outside , the electric circuit change-over switch , the return route connection switch, the electric capacity connected through the print circuit board and the human body contact electrode located in the receiver. The utility model inputs the audio frequency electrical signal into the transformer to enhance potential in the piezoelectricity potsherd electric and increases the mechanical resonance scope to improve the acoustic fidelity. Then the electric circuit change-over switch switches the connection of the two receivers, the parallel circuit fluctuates the electric circuit aggregate capacity to change the audio frequency, the human body contact electrode is used to control the sound and the human body contact electrode spot is carried on the electricity stimulation.

Description

Be provided with the piezoelectric earphone of audio frequency output electrode control device

Affiliated technical field

The utility model relates to a kind of control device that audio electrical signal is converted to the piezoelectric earphone, particularly a kind of piezoelectric earphone of acoustical signal with piezoelectric ceramic piece.

Background technology

" utility model electronic devices and components " Fujian science tech publishing house publishes in the second trifle earphone of first segment electro-acoustic element in book number 1SBN 7-5335-2640-6 one book chapter 4 electro-acoustic element and the relay and put down in writing in September, 2005, piezoelectric earphone is by piezoelectric ceramic piece, sheet metal, vibrating membrane and housing are formed, when signal voltage is added to piezoelectric patches, piezoelectric patches affects vibrating membrane to produce the distortion of response, the vibration pronunciation, but lower tone, be mainly used in speech communication, therefore original piezoelectric earphone function singleness is used for the playback sound of external reception more.

Summary of the invention

In order to improve existing piezoelectric earphone acoustical reproduction sound quality, overcome earphone and only be used to the shortcoming of resetting sound, the utility model provides a kind of piezoelectric earphone that is provided with audio frequency output telegram control device, this earphone can not only be used for external playback sound, and can be, and can in playback sound, carry out electrostimulation to human body with the tone currents that is lower than 50 milliamperes at playback sound time modulation audio frequency.

The technical scheme of the utility model technical solution problem is: the connector at piezoelectric earphone connects in two handset circuitry, one cover audio frequency output electrode control device is set, make three utmost point connectors connect two parallel leads, the connection of the lead other end is contained in a printed circuit board (PCB) electricity input point in the box body, the circuit board face sound channel switch that has been welded, transformer, external human body contact electrode jack, circuit changing switch, the loop connects switch, electric capacity, circuit is linked in sequence by electrical transmission, three utmost point connectors connect two parallel leads and are connected with the sound channel switch, the sound channel switch other end connects two windings of transformer input, the transformer output is two-end-point up and down, upper extreme point connects an external human body contact electrode jack, while connecting circuit change over switch, the group contact is electrically connected two branch roads on the circuit changing switch, a link circuit connects switch, another connects the upper extreme point of the parallel lead of a headset earpiece, the parallel lead lower extreme point of headset earpiece is connected switch with the loop the group contact of going up is electrically connected, the loop connects electrical connection electric capacity one end in group contact on the switch, the electric capacity other end connects the upper extreme point of the two parallel lines of headset earpiece, transformer output lower extreme point is linked in sequence with circuit node, first node branch road connecting circuit change over switch is the group contact down, circuit changing switch lower contact group is electrically connected a branch road and is connected on the circuit changing switch group contact and is connected with the parallel lead upper extreme point of headset earpiece, Section Point connects another electric capacity, the other end of electric capacity is connected group contact connection under the switch with the loop, the loop connects switch and organizes the upper extreme point that contact sets is electrically connected the parallel lead of another headset earpiece down, the lower extreme point of the parallel lead of headset earpiece is connected with transformer output lower extreme point again, two parallel leads of two parallel lead branch of circuit output, insert respectively in two receivers of earphone, connect sheet metal and the potsherd silvered face be fitted in piezoelectric ceramic piece in the headset earpiece housing, be located at the human body contact electrode that two headset earpiece raise one's voice mouthful and be connected with the sheet metal of piezoelectric ceramic piece with power spring.The audio electrical signal input transformer boosts when earphone reception audio electrical signal converts acoustic energy playback sound to, the audio electrical signal that boosts imports the piezoelectric ceramic piece that is fitted in the headset earpiece housing into, increase the electromotive force that is added in piezoelectric ceramic piece, improve the amplitude of the mechanical resonant of piezoelectric ceramic piece, improve the quality of playback sound.The circuit that is connected piezoelectric ceramic piece in two receivers of earphone by the transformer output adopts series connection, switchable circuitry structure in parallel, series-parallel circuit changes the road with circuit changing switch, when the circuit changing switch contact connects series circuit: when the loop connects the switch off-position, connect switch contact by the loop and be electrically connected two receiver series circuits of earphone, realize Headphone reproducing sound, when loop connection switch " is opened " position, the series connection circuit of two receivers of earphone contact with human body and is electrically connected the playback sound that voicefrequency circuit is realized earphone by being located at human body contact electrode that two receivers of earphone raise one's voice mouthful, and the while is carried out the audio-frequency electric stimulation by two human body contact electrodes to human body; When the circuit changing switch contact is converted to parallel circuits: when the loop connects the switch off-position, the circuit changing switch contact is electrically connected the loop and connects switch contact, be electrically connected two receiver shunt circuits of earphone by the circuit switching contact, realize Headphone reproducing sound, when loop connection switch " is opened " position, then being located at human body contact electrode that two receivers of earphone raise one's voice mouthful by human body contact contacts external human body contact electrode simultaneously and is electrically connected the shunt circuit and realizes Headphone reproducing sound, and simultaneously three of human bodies being carried out audio-frequency electric with the upper part by two human body contact electrodes and external human body contact electrode stimulates, because the capacitive characteristic of piezoelectric ceramic piece, when circuit changing switch conversion series connection, increase or reduce the circuit total capacity during parallel circuits, therefore change the piezoelectric ceramic piece mechanical resonant frequency, but the two or more tones of modulation when making Headphone reproducing sound, when loop connection switch " is opened " position, when human body contact electrode of raising one's voice mouthful with headset earpiece and external human body contact electrode carry out electrostimulation to human body, use the volume switch of player to regulate tone currents intensity, therefore the wave volume of resetting sometimes is excessive, each electric capacity in parallel of piezoelectric ceramic piece in same two headset earpiece housings in the circuit, circuit total capacity when being used to increase the loop and connecting switch and " open " position, reduce the mechanical resonant frequency of piezoelectric ceramic piece, thereby reduce the loudness of Headphone reproducing sound when being used for the human body electrostimulation.

Beneficial effect is: can the modulation audio frequency when receiving playback sound, and provide two or more tones selecting, playback sound can be by the human body touch controls, and carry out audio-frequency electric by contact electrode to the human body contact site simultaneously stimulates, and increases the purposes of earphone.

Description of drawings:

Fig. 1 is circuit theory diagrams of the present utility model.

Fig. 2 is the printed circuit board (PCB) face figure of piezoelectric earphone control device.

Fig. 3 is that structural map is partly cutd open in the piezoelectric earphone side.

Among the figure: 1. three utmost point connectors, 2. dual track switches, 3. transformers, 4. external human body contact electrode jack 5. external human body contact electrode 6. circuit changing switches, 7. loops connect switch 8. electric capacity 9. electric capacity 10. piezoelectric ceramic pieces 11. piezoelectric ceramic pieces 12. human body contact electrodes 13. human body contact electrodes 14. springs 15. belt shell face 16. inner pressure rings 17. housings

Embodiment

In Fig. 1, the two parallel lead that three utmost point connectors (1) connect, article one, the line end of parallel lead connects sound channel switch (2), the other end of Lu road switch (2) connects transformer (3) primary coils and link circuits, the line end of another parallel lead connects another primary coil and the link circuit of transformer (3), the last utmost point intermediate connection point of the primary coil upper end connecting circuit change over switch (6) of transformer (3), connect to draw in the line segment and connect the external human body contact electrode of an one pole jack (4) and the external human body contact electrode (5) of pegging graft, circuit changing switch (6) is gone up on the potsherd silvered face of ultra-Left contact connection piezoelectric ceramic piece (10), connect in the line segment of piezoelectric ceramic piece (10) at circuit changing switch (6), first node lead-in wire connecting circuit change over switch (6) is ultra-Right wiring point down, Section Point connects electric capacity (8) upper end: transformer (3) secondary coil lower end connects the potsherd silvered face of piezoelectric ceramic piece (11), transformer (3) secondary coil lower end is in the line segment of piezoelectric ceramic piece (11), first node lead-in wire connecting circuit change over switch (6) is the intermediate point of the utmost point down, Section Point connects electric capacity (9) lower end, circuit changing switch (6) is gone up ultra-Right wiring point link circuit and is connected on the switch (7), the left wiring point at following the two poles of the earth, the loop connects switch (7) and goes up the sheet metal that utmost point intermediate point connects piezoelectric ceramic piece (10), and connect a human body contact electrode (12), the loop connects switch (7) sheet metal of utmost point intermediate connection point connection piezoelectric ceramic piece (11) down, and connect another human body contact electrode (13), the loop connects switch (7) and goes up ultra-Right wiring point connection electric capacity (8) lower end, and the loop connects the upper end that the down ultra-Right wiring point of switch (7) connects electric capacity (9).Transformer is a primary coil end double winding of the same name, unicoil 80 circles, secondary coil 2600 circles.

In the example shown in Figure 2, in one of the two parallel lead access that three utmost point connectors (1) connect and the box body that printed circuit board (PCB) agrees with mutually, be connected printed circuit and import positive and negative wiring point, circuit board is pressed the printed circuit layout in the box body, along outer lateral edges, sound channel switch (2) on one side is welded, external human body contact electrode jack (4), the another side circuit changing switch (6) that is welded, the loop connects switch (7), transformer (3) is contained in circuit board face middle position, electric capacity (8), (9) be welded at circuit output end, dual track switch (2), circuit changing switch (6), the loop connects the horizontal assembling of switch (7), poke rod is outside, external human body contact electrode jack (4) aperture is outside, circuit board output connects two parallel leads of two parallel lead branch of two headset earpiece,, the audio electrical signal output line of parallel lead, connect a potsherd silvered face that is fitted in piezoelectric ceramic piece in the headset earpiece housing (10), the loop is connected to the sheet metal of piezoelectric ceramic piece (10), sheet metal contacts with spring (14), spring (14) other end contacts with human body contact electrode (12), the audio electrical signal output line of another parallel lead, connect the potsherd silvered face that is fitted in piezoelectric ceramic piece (11) in another headset earpiece housing, the loop is connected to the sheet metal of piezoelectric ceramic piece (11), sheet metal contacts with spring (14), and spring (14) other end contacts with human body contact electrode (13).

In the example shown in Figure 3, human body contact electrode (12) insert is in circular casing face (15), extrados appears circular casing face (15), inner pressure ring (16) is included in the circular casing face, compress human body contact electrode (12), human body contact electrode (12) contacts with spring (14) in being contained in the vertical hole of inner pressure ring (16) ring body plane of structure, spring (14) other end contacts with the sheet metal of piezoelectric ceramic piece (10), piezoelectric ceramic piece (10) is contained in the housing (17), and housing and circular casing face are with screw attachment and compress human body contact electrode (12), inner pressure ring (16) and piezoelectric ceramic piece (10).

Claims

1. piezoelectric earphone that is provided with audio frequency output electrode control device, three utmost point connectors connect two parallel leads, two parallel lines of lead other end branch, connect respectively and press-fit in the receiver of piezoelectric ceramic piece, be connected with the sheet metal of piezoelectric ceramic piece and the silvered face of potsherd, it is characterized in that: three utmost point connectors connect two parallel leads, the connection of the lead other end is contained in a printed circuit board (PCB) electricity input point in the box body, the circuit board face sound channel switch that is welded, transformer, the external human body contact electrode of external human body contact electrode jack and grafting, circuit changing switch, the loop connects switch, electric capacity, circuit is linked in sequence by electrical transmission, three utmost point connectors connect two parallel leads and are connected with the sound channel switch, the sound channel switch other end connects two windings of transformer input, the transformer output is two-end-point up and down, upper extreme point connects external human body contact electrode jack, while connecting circuit change over switch, the group contact is electrically connected two branch roads on the circuit changing switch, a link circuit connects switch, another connects the upper extreme point of the parallel lead of a headset earpiece, the parallel lead lower extreme point of headset earpiece is connected switch with the loop the group contact of going up is electrically connected, the loop connects electrical connection electric capacity one end in group contact on the switch, and the electric capacity other end connects the upper extreme point of the two parallel lines of headset earpiece; Transformer output lower extreme point is linked in sequence with circuit node, first node branch road connecting circuit change over switch is the group contact down, circuit changing switch lower contact group electrical connection one is connected to along separate routes and organizes the contact on the circuit changing switch, and be connected with the parallel lead upper extreme point of headset earpiece, Section Point connects another electric capacity, the other end of electric capacity is connected group contact connection under the switch with the loop, the loop connects the upper extreme point that switch lower contact group is electrically connected the parallel lead of another headset earpiece, the parallel lead lower extreme point of headset earpiece is connected with transformer output lower end again, two parallel lines of two parallel lead branch of circuit output, insert respectively in two receivers of earphone, connect the sheet metal be fitted in piezoelectric ceramic piece in the headset earpiece housing and the silvered face of potsherd, be located at the human body contact electrode that two receivers of earphone raise one's voice mouthful and be connected with the sheet metal of piezoelectric ceramic piece with power spring.

2. the piezoelectric earphone that is provided with audio frequency output electrode control device according to claim 1, it is characterized in that: the human body contact electrode that receiver is raised one's voice mouthful is a diameter circle, plate face place's arc also is furnished with the rigid metal film of penetrable sound hole, be contained in the circular casing face, be connected with the sheet metal of piezoelectric ceramic piece with the springs in damaging by pressure in being contained in.

3. the piezoelectric earphone that is provided with audio frequency output electrode control device according to claim 1, it is characterized in that: external human body contact electrode is the piezoelectric earphone receiver that one pair of mouth of raising one's voice is provided with external human body contact electrode, the one pole connector connects lead branch two-way, be connected to the potsherd silvered face that is fitted in piezoelectric ceramic piece in two receivers, one pole connector and external human body contact electrode jack are pegged graft.