CN201887931U - Sound box - Google Patents

Abstract

The utility model relates to a sound box, which comprises a box body, a supporting frame and a loudspeaker. A first air chamber with a circular cross section is arranged in the box body. The supporting frame is used for supporting the box body and is provided with a second air chamber which is communicated with the first chamber. Since the sound box can provide pressure air cushions at different air pressures to the loudspeaker through the air chambers, the sound box can adapt to all kinds of audio sounding and the sound reproduction effect of the loudspeaker is more excellent. Moreover, since an air inlet valve and an air exhaust valve are arranged between the box body and the supporting frame, air inlet and air exhaust of the air chambers are prevented from influencing each other, the pressure air cushions at different air pressures can be formed and disappear in real time in each air chamber, the pressure air cushions successively generated in each air chamber can be prevented from interfering each other and the situation that the sounding quality of the loudspeaker is affected can be avoided.

Description

Audio amplifier

Technical field

The utility model relates to a kind of audio amplifier, relates in particular to a kind of structure that improves audio amplifier, and can make loud speaker reappear better audio frequency.

Background technology

Audio amplifier is made of loud speaker (Loudspeaker) and air chamber, received audio signal and sounding, satisfying the demand of user for sound, thereby audio amplifier becomes an of paramount importance part in the sound system then.Audio amplifier has abundant stereovision and different tone color performances normally by the vibrations of this loud speaker and the pressure air cushion of this air chamber and provide.To introduce the start principle of audio amplifier below.

Fig. 1 is a kind of cutaway view of existing audio amplifier, wherein audio amplifier 1 is formed by outside sheet material, the portion space then constitutes an air chamber 11 within it, and audio amplifier 1 front (right flank among the figure) below is provided with the pore 112 that communicates with air chamber 11 in the audio amplifier 1, the top then is equipped with loud speaker 12, and described loud speaker 12 is promptly practised the monomer that claims.It should be noted that, this pore 112 is used to introduce outside air to air chamber 11, in air chamber 11, to form the required pressure air cushion of sounding in response to various frequency ranges, perhaps as passage so that unnecessary air in the air chamber 11 are discharged outside to, with the 1 pressure inside air cushion of dissipation audio amplifier before carrying out next frequency range.

Above-mentioned loud speaker 12 is by framework 121 and be suspended at 124 formations of vibratile awl basin (cone) of framework 121, as shown in the figure, the rear of framework 121 is provided with permanent magnet 125, awl basin 124 then is provided with the moving-coil (moving coil) 123 that is wound with coil (not shown) near an end of permanent magnet 125, in addition, 121 of moving-coil 123 and frameworks also are provided with and play ripple (damper) 122.Import the moment of loud speaker 12 when the signal of a certain frequency, coil on the moving-coil 123 has the current flowing corresponding with this frequency and makes moving-coil 123 become electromagnet, therefore permanent magnet 125 can be inhaled moving-coil 123 (promptly toward figure in left suction), stretching bullet ripple 122 simultaneously backward.Magnetic force disappears subsequently, and moving-coil 123 is the restoring force of mat bullet ripple 122 and bullet (promptly toward figure in right-hand bullet) forward together with awl basin 124, bores basin 124 thereby compresses the air in the place ahead and sound.

The above person is the sounding principle of traditional audio amplifier.Adopt the reason of the structure of Fig. 1 as for traditional audio amplifier, because can't obtain in the frequency response range of loud speaker 12, can both provide the bullet ripple 122 of suitable elastic force.Generally speaking, no matter the frequency of too hard then loud speaker 12 sounding of bullet ripple 122 why, the capital is rebounded awl basin 124 fast, therefore loud speaker 12 can't send comparatively ideal low frequency, no matter the frequency of bullet ripple 122 too soft then loud speaker 12 sounding why, awl basin 124 is rebounded fast, so loud speaker 12 can't send comparatively ideal high frequency.Therefore; usually can on audio amplifier 1, install loud speaker 12 with softer bullet ripple 122; make awl basin 124 by the 126 compression loud speakers 12 of the hole on the framework 121 air (being the air in the air chamber 11) behind with the action that utilizes permanent magnet 125 that moving-coil 123 is inhaled backward; and at the behind of loud speaker 12 (being audio amplifier 1 inside) generation moment air pressure (also be; the pressure air cushion); utilize the auxiliary ripple 122 that plays of this pressure air cushion again, make loud speaker 12 also can send comparatively ideal high frequency with softer bullet ripple 122.Above-mentioned pressure air cushion is that i.e. pressure release by aforementioned gas holes 112 disappears after producing moment and finishing its task in moment.

In theory, in above-mentioned audio amplifier framework, it must have corresponding different pressures behind when loud speaker 12 produced different audio frequency, just can make loud speaker 12 in each frequency range of frequency response, all can produce comparatively ideal audio frequency, yet, wish that the single air chamber fixing in audio amplifier 1 inner space produces different pressure air cushions, and be not easy, therefore as traditional sound equipment of the formation of Fig. 1, still can't make loud speaker 12 in each frequency range of frequency response, produce comparatively ideal audio frequency.

And, even can in single audio amplifier 1, produce different pressure by air pressure air cushions, the pore 112 of fixed apertures also is difficult to make different pressure by air pressure air cushions instantaneously to disappear, and therefore previous air cushion may take place do not disappear the situation that interferes with each other that next air cushion has produced as yet.This kind air cushion is can not be separately independent and the situation of phase mutual interference not only can not promote the ability that loud speaker reappears former sound, and the anxiety that reduces loudspeaker tonequality is arranged on the contrary.

Therefore, how to provide a kind of audio amplifier, to promote the ability that loud speaker reappears former sound, real is the important topic that present industry is demanded urgently handling.

The utility model content

Because the shortcoming of above-mentioned prior art, main purpose of the present utility model is to provide a kind of audio amplifier, to promote the ability that loud speaker reappears former sound.

For reaching above-mentioned and other purpose, the utility model discloses a kind of audio amplifier, comprising:

Casing, inside have first air chamber of rounded section;

Support the bracing frame of this casing, have breach that should casing outline shape, this bracing frame has second air chamber that is communicated with this first air chamber;

Intake valve and vent valve are located at this casing side on should the position of bracing frame, and are communicated with this first air chamber and second air chamber; And

Loud speaker is installed on the end of this casing and has vibrating diaphragm.

Above-mentioned audio amplifier wherein, also has first dividing plate in this casing, so that this first air chamber is separated into a plurality of gas accommodation spaces, by first air valve is set, be communicated with a plurality of gas accommodation spaces of this first air chamber on this first dividing plate.

Above-mentioned audio amplifier wherein, also has second partition in this casing, so that this second air chamber is separated into a plurality of gas accommodation spaces, by second air valve is set, be communicated with a plurality of gas accommodation spaces of this second air chamber on this second partition.

Above-mentioned audio amplifier, wherein, this casing can have the perforation of the pressure air cushion that passage is provided and is produced before this first air chamber of loss with respect to an end of this loud speaker.

Above-mentioned audio amplifier, wherein, this casing also has by controlling the size of this passage with respect to an end of this loud speaker, and determines the lid of the loss speed of the pressure air cushion that produced before this first air chamber.

Above-mentioned audio amplifier, wherein, this intake valve and vent valve have the adjusting portion of regulating the air pressure of opening.

Above-mentioned audio amplifier, wherein, this adjusting portion can be bolt.

Above-mentioned audio amplifier, wherein, this adjusting portion can be the seat that carries of carrying weight.

Above-mentioned audio amplifier, wherein, this intake valve and vent valve can be slided and air-locked sleeve is socketed to form mutually by a plurality of.

Above-mentioned audio amplifier, wherein, this intake valve and vent valve can be by being constituted in order to the resilient sleeve of adjusting air inlet or discharge directions.

In sum, the utility model provides a kind of audio amplifier, comprise casing, bracing frame and loud speaker, this box house has first air chamber of rounded section, this bracing frame is in order to support this casing and to have second air chamber that is communicated with this first air chamber, because those air chambers make audio amplifier of the present utility model to provide different pressure by air pressure air cushions to loud speaker, to be applicable to the sounding of various audio frequency, and make that the effect of the former sound reproducing of loud speaker is better, and be provided with intake valve and vent valve between this casing and the bracing frame, in order to avoid the air inlet of those air chambers and exhaust influence each other, make respectively in this air chamber different pressure by air pressure air cushions to form in real time and disappear, like this then pressure air cushion that produce before and after avoiding in the air chamber is interfering with each other, and influence the voice quality of loud speaker.

Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.

Description of drawings

Fig. 1 is a kind of cutaway view of existing audio amplifier;

Fig. 2 A is the stereogram of the audio amplifier of an embodiment of the present utility model;

Fig. 2 B is the cutaway view of the audio amplifier of an embodiment of the present utility model;

Fig. 3 A is the cutaway view of the audio amplifier intake valve of an embodiment of the present utility model;

Fig. 3 B is the cutaway view of the audio amplifier vent valve of an embodiment of the present utility model;

Fig. 4 is the cutaway view of the audio amplifier of another embodiment of the present utility model.

Wherein, Reference numeral

2 audio amplifiers

21 casings

21a first end

21b second end

The 21c side

210 loud speaker mounting panels

211 first dividing plates

212 shells

213 first air chambers

213a, 213b, 213c gas accommodation space

214 perforation

215 lids

23 bracing frames

230 second air chambers

230a, 230b gas accommodation space

231 second partitions

24 intake valves

241 joint portions

242 adjusting portions

243 valves

25 vent valves

251 joint portions

252 adjusting portions

253 valves

254 weights

22 loud speakers

221 vibrating diaphragms

222 play ripple

Embodiment

Below by specific instantiation execution mode of the present utility model is described, those skilled in the art can understand other advantage of the present utility model and effect easily by the content that this specification disclosed.The utility model also can be implemented or be used by other different instantiation, and the every details in this specification also can be carried out various modifications and change based on different viewpoints and application under not departing from spirit of the present utility model.

See also Fig. 2 A and Fig. 2 B, stereogram and cutaway view for the audio amplifier of drawing an embodiment of the present utility model, as shown in the figure, the audio amplifier 2 of present embodiment is made of with vent valve 25 casing 21, loud speaker 22, bracing frame 23, intake valve 24, but it should be noted that, the quantity that is provided with of this loud speaker 22 is not exceeded to illustrate in scheming, still can be in response to the quantity that is provided with of this loud speaker 22 of increase in demand of sounding.

This casing 21 has the first relative end 21a and the second end 21b, side 21c, is provided with loud speaker mounting panel 210 in the first end 21a of this casing 21, and this intake valve 24 is located on the sidepiece 21c of this casing 21 in pairs with vent valve 25.In present embodiment, the inside of this casing 21 by sheet material around and form first air chamber 213 with circular cross section, thereby these casing 21 integral body are cylindric, but also can be the fat shape, so that the ripple that shakes that this loud speaker 22 is produced must be on all angles evenly transmits, and produce comparatively desirable tonequality in this first air chamber 213.

This bracing frame 23 has breach 231 that should casing 21 side 21c contour shapes, puts for the side 21c with this casing 21 and supports this casing 21 thereon.This bracing frame 23 has second air chamber 230 that is communicated with this first air chamber 213.In addition, this intake valve 24 and vent valve 25 are located at this casing 21 side 21c on should the position of bracing frame 23, for being communicated with this first air chamber 213 and second air chamber 230, to make this intake valve 24 and vent valve 25 control air flows between this first air chamber 213 and second air chamber 230.

This loud speaker 22 is installed on the loud speaker mounting panel 210 on this casing 21, and have vibrating diaphragm 221 and play ripple 222, this vibrating diaphragm 221 is carried out axial simple harmonic motion with generation shake ripple and sounding forward, and this bullet ripple 222 is used to provide suitable elastic force to control the speed of rebounding of this vibrating diaphragm 221.In present embodiment, this vibrating diaphragm 221 is coniform to this first air chamber 213 direction convergents, so that evenly transmit on all angles of ripple in this first air chamber 213 of shaking that produced, but not as limit, still can suitably change the body of vibrating diaphragm 221, but the spatial form of desirable air chamber should have corresponding relation with the shape of vibrating diaphragm, and so vibrating diaphragm just is unlikely distortion when vibration, and can send comparatively ideal sound.

Unlatching and the closing of this vent valve 25 and in this first air chamber 213 produce pressure air cushion to carry out sounding action of this vibrating diaphragm 221 by this intake valve 24 again, and after action is finished, open this vent valve 25 and close this intake valve 24, making the rapid loss of pressure air cushion that is produced before this first air chamber 213, and exempt to influence the air cushion that this first air chamber 213 produces subsequently to this second air chamber 230.

In addition, in present embodiment, the second end 21b of this casing 21 also can have the perforation 214 that is communicated with this first air chamber 213 and to boring a hole 214 lid 215.This perforation 214 is in order to provide the pressure air cushion of passage to be produced before this first air chamber 213 of loss.This lid 215 is in order to the size of the passage of controlling this perforation 214, and determines the loss speed of the pressure air cushion that produced before this first air chamber 213.For example, can this lid 215 be advanced or retreat, and control the size of the passage of this perforation 214 by being attached to screw on this casing 21.

Seeing also Fig. 3 A and Fig. 3 B, for the convenience that illustrates, is " air valve " hereinafter to be referred as intake valve 24 with vent valve 25; Those air valves all have joint portion 241,251, combining with this casing 21, thereby are able to those air valves are arranged on this casing 21, in present embodiment, those joint portions 241,251 are double-screw bolt, but not as limit, also can select for use combined structure that button hook etc. is easy to dismantle replacement as an alternative.

Preferably, those air valves have adjusting portion 242,252 respectively, regulate the purpose of opening those air valve required air pressure to reach, to adjust the generation and the resolution time of these first and second air chamber 213,230 internal pressure air cushions.Those adjusting portions 242,252 can be designed to various forms, adjusting portion 242 as shown in Figure 3A is designed to bolt, uses the pivot tightness of regulating air valve 24 valves 243, for example, when the pivot tightness heals when high, then the generation of those air chamber internal pressure air cushions and resolution time will be longer.Adjusting portion 252 shown in Fig. 3 B is designed to the seat that carries in order to the carrying weight, to regulate the heavy burden of air valve 25 valves 253 by the increase and decrease of weight 254, for example, heal when high when the heavy burden of this valve 253, then the generation of those air chamber internal pressure air cushions and resolution time also can be longer.

Wai Jie air not necessarily needs to enter this first air chamber 213 through this perforation 214 again; This intake valve 24 also can be located on this casing 23 with vent valve 25, so that extraneous air enters this first air chamber 213 via this second air chamber 230, to finish the sounding task, as shown in Figure 4.

Preferably, those air valves are can be slided mutually and airtight ground sleeve is socketed to form by a plurality of, can be with the airway length that makes those air valve inside according to the situation adjustment, to determine the generation and the resolution time of those air chamber internal pressure air cushions, for example, when the airway length of those air valve inside was longer, then the generation of those air chamber internal pressure air cushions and resolution time also can be longer.

In addition, those air valves also can select the rubber-like sleeve to be constituted, so that adjust the air inlet or the discharge directions of those air valves, and make the relevance grade of those air valves higher.

More be described in detail the start of this loud speaker 22, when causing the moment of first air chamber, 213 spaces increase when these vibrating diaphragm 221 execution simple harmonic motions, air pressure in this first air chamber 213 will be less than the atmospheric pressure in the external world, and cause extraneous air to pour in this first air chamber 213 (at this moment by this intake valve 24, this intake valve 24 is in opening and this vent valve 25 is in closed condition), because this vibrating diaphragm 221 is carried out simple harmonic motion, thereby then this vibrating diaphragm 221 can make the space instantaneous reduction of this first air chamber 213 towards the direction motion of this first air chamber 213, air pressure in this moment this first air chamber 213 will be greater than the atmospheric pressure in the external world, promptly produce in order to change the pressure air cushion of these bullet ripple 222 elastic force, so that the speed of rebounding of this vibrating diaphragm 221 is suitable, must carry out suitable sounding task to make this loud speaker 22.After the sounding task was finished, this pressure air cushion dissipated to extraneous (at this moment, this intake valve 24 is in closed condition and this vent valve 25 is in opening) by this vent valve 25, in order to avoid the air cushion that influence produces subsequently.

It should be noted that, the frequency of loud speaker sounding is lower, the diffusivity of the caused airwaves of air of its vibrating diaphragm compression loud speaker back side air chamber is better, in like manner, the frequency of loud speaker sounding is higher, and it is poorer that then its vibrating diaphragm is compressed in the diffusivity of the caused airwaves of air of loud speaker back side air chamber.Therefore, when the frequency range of these loud speaker 22 sounding heals when high, the diffusivity of the caused airwaves of air of these vibrating diaphragm 221 these first air chambers 213 of compression is poor, thereby the compressed air of this first air chamber 213 is unlikely to moment and diffuses to second air chamber 230, cause the bigger pressure air cushion of moment generation pressure in this first air chamber 213, to strengthen the elastic force that this loud speaker 22 plays ripple, make rebounding of this vibrating diaphragm 221 speed up, send the sound of higher-frequency to make this loud speaker 22.

When the frequency range of these loud speaker 22 sounding is more hanged down, the diffusivity of the caused airwaves of air of these vibrating diaphragm 221 these first air chambers 213 of compression is good, thereby the compressed air of this first air chamber 213 can diffuse to second air chamber 230, cause the less pressure air cushion of this second air chamber 230 moments generation pressure, to adjust the elastic force that this loud speaker 22 plays ripple, make that the speed of rebounding of this vibrating diaphragm 221 is slack-off, send the comparatively sound of low frequency to make this loud speaker 22.

So, if audio amplifier 2 inner area are divided into more air chamber, will make the air chamber of audio amplifier 2 in each different frequency range, to produce corresponding pressure air cushion, to be applicable to the sounding of various audio frequency.See also Fig. 4, in another embodiment, also has second partition 231 in this bracing frame 23, this second air chamber 230 is separated into a plurality of gas accommodation space 230a, 230b, this second partition 231 is provided with second air valve, for the gas communication of a plurality of gas accommodation spaces of this second air chamber, to reach the purpose of the sounding that is applicable to various audio frequency.

It should be noted that this dividing plate 231 quantity is set and do not exceed shown in scheming in the position, still can increase and decrease its quantity or adjust its position, so that this audio amplifier 2 is applicable to the sounding of various audio frequency according to situation.In present embodiment, respectively the pairing gas accommodation space 23 of this gas accommodation space 230a, 230b all is provided with this intake valve 24 and vent valve 25 in pairs with dividing plate 231, to make air pass through different passage turnover respectively this gas accommodation space 230a, 230b, influence the turnover of air to avoid interfering with each other.

Also can be provided with a plurality of first dividing plates 211 again in this casing 21, this first air chamber 231 is separated into a plurality of gas accommodation space 213a, 213b, 213c, be equipped with first air valve on those first dividing plates 211, for a plurality of gas accommodation space 213a of this first air chamber 213, the gas communication of 213b, 213c, to make air pass through different air flue turnover respectively this gas accommodation space 213a, 213b, 213c, influence the turnover of air to avoid interfering with each other.

In sum, the utility model provides a kind of audio amplifier, comprise casing, bracing frame and loud speaker, this box house has first air chamber of rounded section, this bracing frame is in order to support this casing and to have second air chamber that is communicated with this first air chamber, be provided with intake valve and vent valve between this casing and the bracing frame, pass in and out those air chambers, to avoid situation interfering with each other to make air be able to different passages.

Compared to prior art, audio amplifier of the present utility model is owing to have a plurality of air chambers, thereby can provide different pressure by air pressure air cushions to loud speaker, to be applicable to the sounding of various audio frequency, and make that the effect of the former sound reproducing of loud speaker is better, and be provided with intake valve and vent valve between this casing and the bracing frame, thereby the air inlet of those air chambers and exhaust can not interact, make respectively in this air chamber different pressure by air pressure air cushions to form in real time and disappear, pressure air cushion with generation before and after avoiding is interfering with each other, and influences the voice quality of loud speaker.

Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.

Claims (10)

1. an audio amplifier is characterized in that, comprising:

Casing, inside have first air chamber of rounded section;

Support the bracing frame of this casing, have breach that should casing outline shape, this bracing frame has second air chamber that is communicated with this first air chamber;

Intake valve and vent valve are located at this casing side on should the position of bracing frame, and are communicated with this first air chamber and second air chamber; And

Loud speaker is installed on the end of this casing and has vibrating diaphragm.

2. audio amplifier according to claim 1, it is characterized in that also having first dividing plate in this casing, so that this first air chamber is separated into a plurality of gas accommodation spaces, by first air valve is set, be communicated with a plurality of gas accommodation spaces of this first air chamber on this first dividing plate.

3. audio amplifier according to claim 1, it is characterized in that also having second partition in this casing, so that this second air chamber is separated into a plurality of gas accommodation spaces, by second air valve is set, be communicated with a plurality of gas accommodation spaces of this second air chamber on this second partition.

4. audio amplifier according to claim 1 is characterized in that, this casing has the perforation of the pressure air cushion that passage is provided and is produced before this first air chamber of loss with respect to an end of this loud speaker.

5. audio amplifier according to claim 1 is characterized in that, this casing also has by controlling the size of this passage with respect to an end of this loud speaker, and determines the lid of the loss speed of the pressure air cushion that produced before this first air chamber.

6. audio amplifier according to claim 1 is characterized in that, this intake valve and vent valve have the adjusting portion of regulating the air pressure of opening.

7. audio amplifier according to claim 6 is characterized in that, this adjusting portion is a bolt.

8. audio amplifier according to claim 6 is characterized in that, this adjusting portion is the seat that carries of carrying weight.

9. audio amplifier according to claim 1 is characterized in that, this intake valve and vent valve can be slided and air-locked sleeve is socketed to form mutually by a plurality of.

10. audio amplifier according to claim 1 is characterized in that, this intake valve and vent valve are by being constituted in order to the resilient sleeve of adjusting air inlet or discharge directions.

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