CN204291330U - Audio amplifier - Google Patents

Abstract

The utility model provides a kind of audio amplifier, it is characterized in that, audio amplifier comprises: the lid shell and the drain pan that complement each other to form housing, be arranged on the selection of music button also exported for the stressed triggering the selection of music signal of telecommunication of at least two on lid shell, be arranged on the music audio signal selected corresponding to the selection of music signal of telecommunication for receiving the selection of music signal of telecommunication be electrically connected with the selection of music button in drain pan and the circuit structure exported, and be arranged on the loudspeaker for music audio signal being converted into sound be electrically connected with circuit structure in drain pan; Circuit structure comprises music audio signal selection circuit, and the power amplification circuit be electrically connected with music audio signal selection circuit and loudspeaker respectively.Adopt the audio amplifier that the utility model provides, user can select the music needed to keep healthy for corresponding organ easily, drastically increases operation ease, and permanent use can strengthen the physiological function of human body corresponding organ, reaches the effect of health.

Description

Audio amplifier

Technical field

The utility model relates to technology for loudspeaker box field, particularly relates to a kind of audio amplifier.

Background technology

Modern medicine shows, specific music rhythm can activating human body organ, stimulate circulation, play certain health-care effect, listen to the object that can reach health care, health for a long time, different music can produce health-care effect to the different organ of human body.

Music can treat various diseases, and this has been undisputable fact.In mid-term in 20th century, countries in the world have set up musical therapy mechanism in succession, and such as Michigan, United States has organized first musical therapy association in nineteen forty-four, and nineteen forty-six offers again the training of music treatment in Kansas State national university; There has been musical therapy mechanism Australia's nineteen fifty-nine, and between 1969 ~ 1970 years, the state such as moral, method, Denmark, Finland has also set up musical therapy tissue in succession.The medical circle of China and the more late progress starting to notice music treatment in the world of musicians, have some hospitals also to start the research activities of this respect, as Mawangdui, Changsha sanatorium etc.

But sound-box device in the market needs the audio output apparatus such as coupled computer, mobile phone to use, need user find music file voluntarily and play, use very inconvenient.

Utility model content

Based on this, be necessary for the problems referred to above, a kind of audio amplifier of simple operation is provided.

A kind of audio amplifier, described audio amplifier comprises:

Complement each other to form lid shell and the drain pan of housing,

Be arranged on the selection of music button also exported for the stressed triggering the selection of music signal of telecommunication of at least two on described lid shell,

Be arranged on the music audio signal selected corresponding to the described the selection of music signal of telecommunication for receiving the described the selection of music signal of telecommunication be electrically connected with described the selection of music button in described drain pan and the circuit structure exported, and

Be arranged on the loudspeaker for described music audio signal being converted into sound be electrically connected with described circuit structure in described drain pan;

Wherein in an embodiment, described circuit structure comprises:

The music audio signal selection circuit also exported for the music audio signal corresponding to the selected described the selection of music signal of telecommunication be electrically connected with described the selection of music button, and

Be electrically connected with described music audio signal selection circuit and described loudspeaker respectively for described music audio signal being amplified and exporting to the power amplification circuit of described loudspeaker.

Wherein in an embodiment, described audio amplifier also comprise be arranged on described lid shell be electrically connected with described circuit structure be transferred to described circuit structure, to make described circuit structure, the Play Control button of signal controlling carried out to described music audio signal for the stressed triggering Play Control signal of telecommunication.

Wherein in an embodiment, described Play Control button has circular key main body, presses return type switch along the radial limiting section extended of described key main body and the bidirectional rotation be fixedly connected with described key main body inner surface;

Described lid shell outer surface depressions forms first resettlement section with the circular open coordinated with described key main body, described first resettlement section sidewall along the peripheral indentation of described opening formed for hold described limiting section for when described key main body rotation or along during described key main body axial motion for described limiting section provides activity space second resettlement section;

Described first resettlement section central part is recessed to form along the pressing direction of described key main body the 3rd resettlement section holding and fix described bidirectional rotation pressing return type switch.

Wherein in an embodiment, described key main body presses rotating shaft clockwise rotation, the counter-clockwise rotary motion of return type switch for driving described bidirectional rotation or moves along described key main body pressing direction, and the motion in the described bidirectional rotation pressing each direction of return type switch is respectively used to trigger the one starting or suspend and play a piece of music signal of telecommunication in the signal of telecommunication, broadcasting and play in next music electrical signal.

Wherein in an embodiment, described lid shell is provided with and is connected with described circuit structure and the breath light glimmered with 16 ~ 30 frequency-flat per minute.

Wherein in an embodiment, described circuit structure also comprises the music audio signal for the encryption exported by described music audio signal selection circuit be electrically connected with described music audio signal selection circuit and described loudspeaker respectively and deciphers and export to the decrypt circuit of described loudspeaker.

Wherein in an embodiment, described loudspeaker are resonant horn.

Wherein in an embodiment, described loudspeaker comprise: bracing frame, field generator for magnetic, coil rack, coil, vibrating reed and vibrating base;

Support frame as described above is fixedly connected with the bottom of described drain pan, for supporting described field generator for magnetic, coil rack, the coil, vibrating reed and the vibrating base that are connected with described circuit structure;

One end that described coil rack is provided with coil is arranged in the magnetic field that described field generator for magnetic produces, and described coil rack is used at described music audio signal electric current by vibrating in the magnetic field that described field generator for magnetic produces during described coil;

Described vibrating reed to be connected on support frame as described above and to engage with the described coil rack other end, for the conduct vibrations of described coil rack being given the vibrating base be connected with described vibrating reed;

Described vibrating base part protrudes from that described drain pan is outside, and side has lug boss, and for being connected with described vibrating reed, opposite side is even surface, for external vibration medium contact and drive described external vibration vibration of media.

Above-mentioned audio amplifier, user presses the selection of music button on audio amplifier lid shell, just can trigger the corresponding the selection of music signal of telecommunication, thus by the music audio signal of the circuit structure in audio amplifier according to this selection of music signal of telecommunication corresponding to the selected the selection of music signal of telecommunication, and be transferred to loudspeaker and make its sounding.User can select the music needed to keep healthy for corresponding organ easily, drastically increases operation ease, and permanent use can strengthen the physiological function of human body corresponding organ, reaches the effect of health.

Accompanying drawing explanation

The structural representation observed above lid shell when Fig. 1 is audio amplifier horizontal positioned in an embodiment;

The structural representation that Fig. 2 observes when being audio amplifier horizontal positioned in an embodiment from the side;

Fig. 3 is the radial section schematic diagram of audio amplifier in an embodiment;

Fig. 4 is the structural representation of bidirectional rotation pressing return type switch in an embodiment;

Fig. 5 is the schematic diagram of the one side that the rotor plate in an embodiment in Fig. 4 coordinates with switch housing;

Fig. 6 is the schematic diagram of the one side that the switch housing in an embodiment in Fig. 4 coordinates with rotor plate;

Fig. 7 is the circuit composition schematic diagram of circuit structure in an embodiment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

Consistent referring to figs. 1 through element ratio in Fig. 3, Fig. 1 to Fig. 3.Audio amplifier comprises lid shell 110, the selection of music button 111 ~ 118, drain pan 120, circuit structure 130 and loudspeaker.

Its middle cover shell 110 can be bowl-type with drain pan 120, there is cooperation opening of the same size, thus lid shell 110 can coordinate with drain pan 120 and form the complete housing for holding circuit structure 130 and loudspeaker, and can be fixed by gluing or bolt between lid shell 110 and drain pan 120.Certainly in other embodiments, lid shell and drain pan can also adopt other shape respectively, such as bucket shape, cubic shaped etc., certainly need lid shell 110 and drain pan 120 to have respectively and of the same sizely coordinate opening, makes both can be combined together the complete housing forming audio amplifier.

The selection of music button 111 ~ 118 is arranged on lid shell 110.Particularly, the fixed part that the selection of music button comprises key main body and is connected with this key main body, the key main body of the selection of music button runs through lid shell 110 from the inner surface of lid shell 110 by the preformed hole matched with key main body shape, size and reaches lid shell 110 outside, and the fixed part of the selection of music button is then for being fixedly connected with by fixed forms such as gluing, bolt, plastics casting with lid shell 110.

The quantity of the selection of music button is at least two, and the selection of music button is electrically connected with circuit structure 130, is transferred to circuit structure 130 for the stressed triggering the selection of music signal of telecommunication.In one embodiment, as shown in Figure 1 to Figure 3, the selection of music button is eight, and preferably, eight the selection of music buttons are evenly arranged in lid shell 110 periphery.

When the quantity of the selection of music button is less than eight, then the kind of the selection of music button can be chosen as required.

The selection of music button 111 ~ 118 is electrically connected with the circuit structure 130 be arranged in drain pan respectively, is transferred to circuit structure 130 for the stressed triggering the selection of music signal of telecommunication.The selection of music button 111 ~ 118 triggers the different the selection of music signals of telecommunication respectively when stressed, and this selection of music signal of telecommunication can be a pulse signal, or the voltage signal of several low and high level composition, and it is specifically implemented means and does not limit.

Circuit structure 130 is electrically connected with loudspeaker, is transferred to loudspeaker for the music audio signal corresponding to the selected the selection of music signal of telecommunication.Particularly, each the selection of music button is respectively used to trigger corresponding music audio signal.Circuit structure 130 can adopt based on existing Music Clip and process and export music audio signal, Music Clip is a kind of fairly simple sound circuit, it is by inner oscillating circuit, external a small amount of discrete component again, just various audio signal can be produced, such as TE1700, TE1900 Music Clip etc.Certain Music Clip, for providing the disposal ability to music audio signal, be not whole circuit structure is all existing.Circuit structure 130 is fixed in drain pan 120 by circuit carriers 131.

Loudspeaker are arranged in drain pan 120, and can be that local is arranged in drain pan 120, these loudspeaker be used for music audio signal to be converted into sound.Specifically can be used for the music audio signal that exported by circuit structure 130 and directly or by other Medium Propagation go out formation sound.Loudspeaker can adopt film loudspeaker, also can adopt resonant horn.Resonant horn is a kind of loudspeaker being different from the friction film of film loudspeaker, and it can drive external vibration medium and sound.

Above-mentioned audio amplifier, user presses the selection of music button on audio amplifier lid shell, just can trigger the corresponding the selection of music signal of telecommunication, thus by the music audio signal of the circuit structure in audio amplifier according to this selection of music signal of telecommunication corresponding to the selected the selection of music signal of telecommunication, and be transferred to loudspeaker and make its sounding.User can select the music needed to keep healthy for corresponding organ easily, drastically increases operation ease, and permanent use can strengthen the physiological function of human body corresponding organ, reaches the effect of health.

Referring to figs. 1 to Fig. 3, audio amplifier also comprise be arranged on lid shell 110 be electrically connected with circuit structure 130 be transferred to circuit structure 130 with the Play Control button 140 making circuit structure 130 pairs of music audio signals carry out signal controlling for the stressed triggering Play Control signal of telecommunication.

Particularly, the Play Control signal of telecommunication is used for carrying out signal controlling to the current music audio signal exporting to loudspeaker, and the Play Control signal of telecommunication includes but not limited to start to play the signal of telecommunication, time-out plays the signal of telecommunication, play a piece of music signal of telecommunication in next music electrical signal, broadcasting, volume increases the signal of telecommunication and volume reduces the signal of telecommunication etc.Particularly, circuit structure 130, for suspending the process of music audio signal and output when receiving and starting to play the signal of telecommunication, then continues when receiving and starting to play the signal of telecommunication process music audio signal and export.Circuit structure 130 for be switched to triggering when receiving and playing next music electrical signal the selection of music signal of telecommunication corresponding to next music electrical signal and export to loudspeaker; Similarly, circuit structure 130 for be switched to triggering when receiving a piece of music signal of telecommunication in broadcasting the selection of music signal of telecommunication corresponding to a upper music electrical signal and export to loudspeaker.

With reference to Fig. 3, in one embodiment, Play Control button 140 has key main body 141, limiting section 142 and bidirectional rotation pressing return type switch 143, and key main body 141 is circular, key main body 141 radially extends and forms limiting section 142, and bidirectional rotation pressing return type switch 143 is fixedly connected with key main body 141 inner surface.

Lid shell 110 outer surface caves inward formation first resettlement section 144, and this first resettlement section 144 has the circular open 144a coordinated with key main body 141.First resettlement section 144 is preferably placed at the central part of lid shell 110.The sidewall of the first resettlement section 144 along the peripheral indentation of opening 144a and the second resettlement section 145 formed for holding limiting section 142, this second resettlement section 145 for rotate when key main body 141 or along during key main body 141 axial motion for limiting section 142 provides activity space.First resettlement section 145 central part is recessed to form the 3rd resettlement section 147 along the pressing direction of key main body 141, for holding and fixing bidirectional rotation pressing return type switch 143.Shape and the bidirectional rotation of the 3rd resettlement section 147 press return type switch 143 and mate, and bidirectional rotation pressing return type switch 143 is fixed on the bottom of the 3rd resettlement section 147.

With reference to Fig. 4-Fig. 6, Fig. 4 is the structural representation of bidirectional rotation pressing return type switch 143 in an embodiment, Fig. 5 is the schematic diagram of the one side that the rotor plate 143c in an embodiment in Fig. 4 coordinates with switch housing 143b, and Fig. 6 is the schematic diagram of the one side that the switch housing 143b in an embodiment in Fig. 4 coordinates with rotor plate 143c.Particularly, bidirectional rotation pressing return type switch 143 comprises rotating shaft 143a, switch housing 143b, rotor plate 143c, spring 143d, electroconductive elastic sheet 143e and the first conductive contact blade 143f.Its shaft 143a is fixedly connected with key main body 141 inner surface, and switch housing 143b is fixed on the bottom of the 3rd resettlement section 147, and switch housing 143b is provided with and passes and the circular hole 143b1 rotated for rotating shaft 143a.

Rotor plate 143c central part offers the fixing hole 143c1 coordinated with rotating shaft 143a, also comprise the second conductive contact blade 143c2 be arranged in its one side coordinated with switch housing 143b, the quantity of the second conductive contact blade 143c2 can be one or two of arranging relative to the Central Symmetry of rotor plate.The one side coordinated with rotor plate 143c in switch housing 143b is provided with the 3rd conductive contact blade 143b2, when rotating shaft 143a does not stress in a rotational direction, 3rd conductive contact blade 143b2 quantity is 2 and is positioned at the both sides of the second conductive contact blade 143c2, or the 3rd conductive contact blade 143b2 quantity be 4 and wherein 2 both sides being positioned at the second conductive contact blade 143c2 two other be then arranged on aforementioned two positions separately relative to circular hole 143b1 symmetry.

Spring 143d is set on rotating shaft 143a, and its one end is fixedly connected with bottom switch housing 143b, and the other end is fixedly connected with the sheathed and rotor plate 143c be fixed on rotating shaft 143a.Electroconductive elastic sheet 143e is fixed on the position of the positive countershaft 143a of switch housing 143b inner bottom part, the first conductive contact blade 143f is fixed on bottom switch housing 143b, under electroconductive elastic sheet 143e coverage, and there is gap between electroconductive elastic sheet 143e.

Such rotating shaft 143a can along clockwise or counterclockwise bidirectional rotation, can also along its axial motion, and due to the elasticity of spring 143d, rotating shaft 143a can both be returned to initial condition.And drive rotor plate 143c to rotate when rotating shaft 143a rotates along a direction, when turning to certain angle, the second conductive contact blade 143c2 contacts with the 3rd conductive contact blade 143b2 of side and realizes the effect of first switch, drive rotor plate 143c also to rotate to another way similarly when rotating shaft 143a rotates along another direction, when turning to certain angle, the second conductive contact blade 143c2 contacts with the 3rd conductive contact blade 143b2 of opposite side and realizes the effect of second switch.Cause when rotating shaft 143a is pressed vertically electroconductive elastic sheet 143e that deformation occurs and contact to realize the effect of the 3rd switch with the first conductive contact blade 143f.

In one embodiment, key main body 141 presses rotating shaft 143a clockwise rotation, the counter-clockwise rotary motion of return type switch 143 for driving bidirectional rotation or presses direction along key main body 141 and move, and the motion in the bidirectional rotation pressing each direction of return type switch 143 is respectively used to trigger the one starting or suspend and play a piece of music signal of telecommunication in the signal of telecommunication, broadcasting and play in next music electrical signal.In the present embodiment, turning clockwise, be rotated counterclockwise and press of key main body 141 can trigger a kind of Play Control signal of telecommunication all respectively and be transferred to circuit structure 130, carries out signal controlling to make circuit structure 130 pairs of music audio signals.Preferably, key main body 141 drives rotating shaft 143a to be rotated counterclockwise and plays the upper a piece of music signal of telecommunication for triggering, key main body 141 drives rotating shaft 143a dextrorotation to be diverted to and triggers next music electrical signal of broadcasting, and key main body 141 drives rotating shaft 143a to move along pressing direction for triggering beginning or suspending the broadcasting signal of telecommunication.Wherein start or suspend the broadcasting signal of telecommunication to refer to that current just triggering when playing audio signal suspends the broadcasting signal of telecommunication, when being in stopping or time-out playing audio signal if current, triggering and start to play the signal of telecommunication.

In one embodiment, lid shell 110 is provided with and is connected with circuit structure 130 and the breath light glimmered with 16 ~ 30 frequency-flat per minute.Breath light is connected with circuit structure 130, by it controls with 16 ~ 30 frequency scintillations per minute, especially with 20 ~ 25 frequency scintillations per minute.The flicker frequency of breath light is probably consistent with human body respiration frequency, for user provides the reference of respiratory rate while playing music.Wherein the color of breath light can be shades of colour, and quantity can be arranged as required, multiple breath light can be distributed in lid shell 110 periphery and and the selection of music button 111 ~ 118 interval arrange.

With reference to figure 7, in one embodiment, circuit structure 130 comprises the music audio signal selection circuit 130a and power amplification circuit 130b that are electrically connected.Wherein music audio signal selection circuit 130a is electrically connected respectively with the selection of music button 111 ~ 118, exports to power amplification circuit 130b for the music audio signal corresponding to the selected the selection of music signal of telecommunication.Power amplification circuit 130b is electrically connected with loudspeaker, for being amplified by music audio signal and exporting to loudspeaker, makes loudspeaker that the music audio signal of amplification is converted to sound.Wherein which the selection of music signal of telecommunication music audio signal selection circuit 130a for receiving, and just selectes Na mono-road music audio signal corresponding to this selection of music signal of telecommunication and export, just can be realized by pure circuit.

In one embodiment, circuit structure 130 also comprises signal control circuit 130c, is electrically connected respectively with Play Control button 140, music audio signal selection circuit 130a and power amplification circuit 130b.Signal control circuit 130c carries out signal controlling for the Play Control signal of telecommunication that receives Play Control button 140 and trigger to music audio signal.Particularly, the Play Control signal of telecommunication includes but not limited to start to play the signal of telecommunication, time-out plays the signal of telecommunication, play a piece of music signal of telecommunication in next music electrical signal, broadcasting, volume increases the signal of telecommunication and volume reduces the signal of telecommunication etc.

In one embodiment, described circuit structure 130 also comprises the music audio signal for the encryption exported by described music audio signal selection circuit be electrically connected with described music audio signal selection circuit 130a and described loudspeaker respectively and deciphers and export to the decrypt circuit 130d of described loudspeaker.Music audio signal, through encryption, can prevent music audio signal from being usurped by miscellaneous equipment.The encryption of music audio signal is referred to music audio signal is converted into the signal of telecommunication that cannot play-over by level translation, and be exactly the inverse process encrypted to the music audio signal of encryption, unordered sequence of levels is reduced to music audio signal thus plays.

Cite a plain example, suppose that a bit of sequence of levels of music audio signal is for just low, during encryption from this sequence of levels first every position negate, the sequence of levels of so encrypting is that low high height is high, so decrypt circuit 130d just can be made into the logical circuit every position negate from first, then the sequence of levels of encryption can be reduced to original sequence of levels for high just low, to realize the hard deciphering to music audio signal.

In one embodiment, bluetooth module 160 is also provided with in voice box casing, be electrically connected with circuit structure 130, specifically be electrically connected with music audio signal selection circuit 130a, for matching with the bluetooth module of terminal and the music bluetooth signal that sends of receiving terminal thus be converted into music audio signal and be transferred to circuit structure 130 and process, be specifically transferred to music audio signal selection circuit 130a process.

In one embodiment, USB (Universal Serial Bus is also provided with in voice box casing, USB) interface 170, be electrically connected with circuit structure 130, specifically be electrically connected with music audio signal selection circuit 130a, for being connected with terminal by USB data line, the music audio signal that receiving terminal is sent by USB data line is also transferred to circuit structure 130 and processes, and is specifically transferred to music audio signal selection circuit 130a process.

Certain audio amplifier also comprises supply module 180, be connected with needing the electric component of powering in audio amplifier and be that it is powered, supply module 180 can be the battery auxiliary circuit be connected with battery, also can be transforming and voltage stabilizing circuit for alternating current-direct current of being electrically connected with external communication city, can also be and the cooperation circuit that outside alternating current-direct current transforms and stable-pressure device is connected.

The structure of loudspeaker when illustrating that loudspeaker are vibrating loudspeakers below in conjunction with Fig. 3.Particularly, loudspeaker comprise: bracing frame 151, field generator for magnetic, coil rack 152, coil 153, vibrating reed 154 and vibrating base 155.Bracing frame 151 is connected with the bottom of drain pan 120, for supporting field generator for magnetic, coil rack 152, the coil 153 be connected with circuit structure 130, vibrating reed 154 and vibrating base 155.One end that coil rack 152 is provided with coil 153 is arranged in the magnetic field that field generator for magnetic produces, coil rack 152 at music audio signal electric current by vibrating in the magnetic field that field generator for magnetic produces during coil 153.Vibrating reed 154 to be connected on bracing frame 151 and to engage with coil rack 152 other end, for the conduct vibrations of coil rack 152 being given the vibrating base 155 be connected with vibrating reed 154.Vibrating base 155 part protrudes from drain pan outside, and side has lug boss, and for being connected with vibrating reed, opposite side is even surface, for driving external vibration vibration of media with external vibration medium contact.

In one embodiment, the boss of vibrating base 155 is in the central part of vibrating base 155, and the lug boss of vibrating base 155 is connected with the shaft hole matching of circular vibrating reed 154.In one embodiment, field generator for magnetic comprises magnet 156 and two pieces of electrician's iron (T iron), 157 ~ 158, two blocks of electrician's iron 157 ~ 158 are folded in magnet 156 the two poles of the earth, forms magnetic field for magnetic conduction and around coil 153.In one embodiment, coil rack 152 is cylindric, is set on vibrating reed 154.

In the present embodiment, the loudspeaker of audio amplifier adopt resonant horn, can drive external vibration vibration of media by vibrating base 155 and external vibration medium contact, external vibration Media Ratio is as being plank, glass, marble plane etc., and different external vibration medium can produce different audios.

The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims (8)

1. an audio amplifier, is characterized in that, described audio amplifier comprises:

Complement each other to form lid shell and the drain pan of housing,

Be arranged on the selection of music button also exported for the stressed triggering the selection of music signal of telecommunication of at least two on described lid shell,

Be arranged on the music audio signal selected corresponding to the described the selection of music signal of telecommunication for receiving the described the selection of music signal of telecommunication be electrically connected with described the selection of music button in described drain pan and the circuit structure exported, and

Be arranged on the loudspeaker for described music audio signal being converted into sound be electrically connected with described circuit structure in described drain pan;

Described circuit structure comprises:

The music audio signal selection circuit also exported for the music audio signal corresponding to the selected described the selection of music signal of telecommunication be electrically connected with described the selection of music button, and

Be electrically connected with described music audio signal selection circuit and described loudspeaker respectively for described music audio signal being amplified and exporting to the power amplification circuit of described loudspeaker.

2. audio amplifier according to claim 1, it is characterized in that, described audio amplifier also comprise be arranged on described lid shell be electrically connected with described circuit structure be transferred to described circuit structure, to make described circuit structure, the Play Control button of signal controlling carried out to described music audio signal for the stressed triggering Play Control signal of telecommunication.

3. audio amplifier according to claim 2, is characterized in that, described Play Control button has circular key main body, presses return type switch along the radial limiting section extended of described key main body and the bidirectional rotation be fixedly connected with described key main body inner surface;

Described lid shell outer surface depressions forms first resettlement section with the circular open coordinated with described key main body, described first resettlement section sidewall along the peripheral indentation of described opening formed hold described limiting section and for when described key main body rotation or along during described key main body axial motion for described limiting section provides activity space second resettlement section;

Described first resettlement section central part is recessed to form along the pressing direction of described key main body the 3rd resettlement section holding and fix described bidirectional rotation pressing return type switch.

4. audio amplifier according to claim 3, it is characterized in that, described key main body presses rotating shaft clockwise rotation, the counter-clockwise rotary motion of return type switch for driving described bidirectional rotation or moves along described key main body pressing direction, and the motion in the described bidirectional rotation pressing each direction of return type switch is respectively used to trigger the one starting or suspend and play a piece of music signal of telecommunication in the signal of telecommunication, broadcasting and play in next music electrical signal.

5. audio amplifier according to claim 1, is characterized in that, described lid shell is provided with and is connected with described circuit structure and the breath light glimmered with 16 ~ 30 frequency-flat per minute.

6. audio amplifier according to claim 1, it is characterized in that, described circuit structure also comprises the music audio signal for the encryption exported by described music audio signal selection circuit be electrically connected with described music audio signal selection circuit and described loudspeaker respectively and deciphers and export to the decrypt circuit of described loudspeaker.

7. audio amplifier according to claim 1, is characterized in that, described loudspeaker are resonant horn.

8. audio amplifier according to claim 7, is characterized in that, described loudspeaker comprise: bracing frame, field generator for magnetic, coil rack, coil, vibrating reed and vibrating base;

Support frame as described above is fixedly connected with the bottom of described drain pan, for supporting described field generator for magnetic, coil rack, the coil, vibrating reed and the vibrating base that are connected with described circuit structure;

One end that described coil rack is provided with coil is arranged in the magnetic field that described field generator for magnetic produces, and described coil rack is used at described music audio signal electric current by vibrating in the magnetic field that described field generator for magnetic produces during described coil;

Described vibrating reed to be connected on support frame as described above and to engage with the described coil rack other end, for the conduct vibrations of described coil rack being given the vibrating base be connected with described vibrating reed;

Described vibrating base part protrudes from that described drain pan is outside, and side has lug boss, and for being connected with described vibrating reed, opposite side is even surface, for external vibration medium contact and drive described external vibration vibration of media.