CN107371106A

CN107371106A - Loudspeaker enclosure

Info

Publication number: CN107371106A
Application number: CN201710537049.4A
Authority: CN
Inventors: 秦鹏
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2017-07-04
Filing date: 2017-07-04
Publication date: 2017-11-21

Abstract

The invention provides a kind of loudspeaker enclosure, including the housing with receiving space and the sounding monomer being contained in the receiving space, the receiving space is separated into ante-chamber and the back cavity relative with the ante-chamber by the sounding monomer, the ante-chamber is in communication with the outside, the position that the back cavity is corresponded on the housing is provided with the through-hole section for running through housing, the loudspeaker enclosure also includes being connected with the housing and the elastic cover plate of the through-hole section being completely covered, the elastic cover plate is used for the energy for absorbing the vibration under particular resonant frequency, the Young's modulus or intensity of the elastic cover plate are less than the Young's modulus or intensity of the housing.Compared with correlation technique, loudspeaker enclosure sensitivity of the invention is good, distortion is small and acoustical behavior is good.

Description

Loudspeaker enclosure

【Technical field】

The present invention relates to acoustic-electric field, more particularly to a kind of loudspeaker enclosure for applying to portable type electronic product.

【Background technology】

With the arrival in mobile Internet epoch, the quantity of Intelligent mobile equipment constantly rises.And in numerous mobile devices Among, mobile phone is undoubtedly most common, most portable mobile terminal device.At present, the function of mobile phone is extremely various, and one of them is just It is the music function of high-quality, therefore, the loudspeaker enclosure for playing sound is widely applied Intelligent mobile equipment till now Among.

The loudspeaker enclosure of correlation technique includes housing, the sounding monomer being contained in the housing, through the shell The leak holes that body is set and the cover plate for being covered on the leak holes, the sounding monomer include the vibrating diaphragm for vibration sounding, institute State vibrating diaphragm to be arranged at intervals to form the preceding operatic tunes with the housing, the leak holes are set with the vibrating diaphragm face, the loudspeaker enclosure Also include leading sound passage by what the preceding operatic tunes was in communication with the outside, the preceding operatic tunes collectively forms described raise with the sound passage of leading The ante-chamber of sound device case.

However, in the loudspeaker enclosure of correlation technique, the shell wall of the back cavity is hard plastic or metal material shape Into rigid walls, the damping of rigid walls is small and Oscillation Amplitude is small, and emittance is limited, can not effectively pass the cavity energy of back cavity Broadcast is gone, thus can not absorb the energy of assigned frequency.Therefore, the structure easily causes the back cavity to produce back cavity resonance, and then Cause sensitivity decrease, the sounding distortion of the loudspeaker enclosure, influence the acoustical behavior of the loudspeaker enclosure.

Therefore, a kind of new loudspeaker enclosure must be provided by, which having in fact, solves above-mentioned technical problem.

【The content of the invention】

It is an object of the invention to provide the loudspeaker enclosure that a kind of sensitivity is good, distortion is small and acoustical behavior is good.

In order to achieve the above object, the invention provides a kind of loudspeaker enclosure, including housing and receipts with receiving space The sounding monomer being dissolved in the receiving space, the sounding monomer by the receiving space be separated into ante-chamber and with the ante-chamber Relative back cavity, the ante-chamber are in communication with the outside, and the position that the back cavity is corresponded on the housing is provided with the through hole for running through housing Portion, the loudspeaker enclosure also include being connected with the housing and the elastic cover plate of the through-hole section being completely covered, the elastomeric cap Plate is used for the energy for absorbing the vibration under particular resonant frequency, and the Young's modulus or intensity of the elastic cover plate are less than the housing Young's modulus or intensity.

Preferably, the housing includes lower cover, surrounds upper lid and the formation of the receiving space jointly with the lower cover In the upper lid be in communication with the outside lead sound passage, the sounding monomer and the upper lid surround the preceding operatic tunes jointly, before described The operatic tunes connects with the sound passage of leading and is collectively forming the ante-chamber, and the sounding monomer and the upper lid and the lower cover are common Surround the back cavity.

Preferably, the through-hole section is set through the upper lid, and the elastic cover plate is fixed on the upper lid.

Preferably, the through-hole section is set through the lower cover, and the elastic cover plate is fixed on the lower cover.

Preferably, the elastic cover plate is formed with the housing by double-shot moulding or hot pressing or stickup or ultrasonic bonding It is fixedly connected.

Preferably, the elastic cover plate absorbs the energy for the vibration that resonant frequency is 300~12000Hz.

Preferably, the elastic cover plate absorbs the energy for the vibration that resonant frequency is 800~3000Hz.

Preferably, the elastic cover plate is made up of TPU or MCP or silica gel.

Compared with correlation technique, the housing of loudspeaker enclosure of the invention includes the through hole that the corresponding rear portion is formed Portion, the loudspeaker enclosure also includes being connected with the housing and covering the elastic cover plate of the through-hole section, for absorbing specific frequency The energy of vibration under the resonant frequency of rate, so as to weaken the resonance effect of the loudspeaker enclosure back cavity, and its distortion is reduced, Sensitivity is improved, and then improves the acoustical behavior of the loudspeaker enclosure.

【Brief description of the drawings】

Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other Accompanying drawing, wherein：

Fig. 1 is the three-dimensional structure diagram of loudspeaker enclosure of the present invention；

Fig. 2 is the stereochemical structure decomposed schematic diagram of loudspeaker enclosure of the present invention；

Fig. 3 is the cut-away view of the line A-A along Fig. 1；

Fig. 4 is the cut-away view of the line B-B along Fig. 1；

Fig. 5 is the cut-away view of the line C-C along Fig. 1；

Fig. 6 be the present invention loudspeaker enclosure and correlation technique rigid walls loudspeaker enclosure frequency response curve comparison diagram.

【Embodiment】

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

Please refer to Fig. 1-5, the invention provides a kind of loudspeaker enclosure 100, including the housing with receiving space 20 10 and the sounding monomer 3 that is contained in the receiving space 20, wherein, the housing 10 include lower cover 1 and be covered on it is described under The upper lid 2 of lid 1, the upper lid 2 surround receiving space 20 jointly with the lower cover 1.

The receiving space 20 is separated into ante-chamber 101 and the back cavity relative with the ante-chamber 101 by the sounding monomer 3 102.Specifically, the loudspeaker enclosure 100 include be formed at the upper lid 2 be in communication with the outside lead sound passage 4, the sounding Monomer 3 and the upper lid 2 surround the preceding operatic tunes 7 jointly, and the preceding operatic tunes 7 is connected and is collectively forming described with the sound passage 4 of leading Ante-chamber 101, the sounding monomer 3 surround the back cavity 102 jointly with the upper lid 2 and the lower cover 1.

The position that the back cavity 102 is corresponded on the housing 10 is provided with the through-hole section 5 for running through housing 10, the through-hole section 5 The lower cover 1 or the upper lid 2 can be located at.The loudspeaker enclosure 100 also includes being connected with the housing 10 and institute being completely covered The elastic cover plate 6 of through-hole section 5 is stated, wherein, the fixed form of elastic cover plate 6 and the housing 10 can be a variety of, such as, the bullet Property cover plate 6 is formed a fixed connection with the housing 10 by double-shot moulding or hot pressing or stickup or ultrasonic bonding, certainly, described Elastic cover plate 6 and the housing 10 or integrated formed structure, this is all feasible.The Young's modulus of the elastic cover plate 6 Or intensity is less than the Young's modulus or intensity of the housing 10, shaking under the particular resonant frequency for absorbing the back cavity 102 Dynamic energy.

In present embodiment, the through-hole section 5 is set through the upper lid 2, and its shape is unlimited, may be designed as rectangle, circle Shape or other shapes, the elastic cover plate 6 are arranged at the upper lid 2.

Replace the rigid walls of back cavity in correlation technique by the elastic cover plate 6 in the present invention, and the elastic cover plate 6 In the presence of a resonant frequency, by design, when the resonant frequency of the elastic cover plate 6 is adjusted into a certain frequency, in resonance frequency Near rate, the elastic cover plate 6 can produce stronger vibration, and in 100 sounding of loudspeaker enclosure, the sounding monomer 3 shakes It is dynamic, compress the air in the back cavity 102 and produce energy, energy driving elastic cover plate 6 vibrates, so as to consume the back cavity Energy in 102, the elastic cover plate 6 preferably vibrate under its resonant frequency, and now oscillation intensity reaches maximum, so as to More energy are consumed, and then absorb the purpose of the energy of the vibration near assigned frequency；In addition, pass through the elastomeric cap Plate 6 substitutes rigid walls and can pass to medium density in the back cavity 102 outside the back cavity 102, and it is humorous to weaken the back cavity 102 Shake, have the function that the sensitivity for lifting some frequencies, and then reduce the covibration and intermediate frequency of the loudspeaker enclosure 100 The frequency response valley point problem caused by back cavity resonance, improve distortion, improve sensitivity.

It is designed especially by material, area, shape and thickness to the elastic cover plate 6 to realize above-mentioned purpose. In present embodiment, the elastic cover plate 6 is made using the relatively low material of Young's modulus or intensity, at least below the housing 10 Young's modulus or intensity, for example be made using TPU or MCP or silica gel material.Again by double-shot moulding or hot pressing or stickup or Ultrasonic bonding forms a fixed connection in the housing 10, forms the part-structure of the back cavity 102, absorbs the loudspeaker enclosure Energy near 100 resonance peak of the back cavity 102, reach the resonance for weakening the back cavity 102, lift the sensitive of some frequencies The purpose of degree, and then improve the acoustical behavior of the loudspeaker enclosure 100.The resonant frequency that elastic cover plate 6 can absorb as needed Scope is designed adjustment.Specific resonant frequency is the resonant frequency range that the needs set absorb.

Referring to Fig. 6, the frequency response curve pair of the loudspeaker enclosure for the rigid walls of loudspeaker enclosure and correlation technique of the invention Than figure, wherein curve a represents to use the frequency response curve of loudspeaker enclosure corresponding to rigid walls in correlation technique, and curve b represents this hair The frequency response curve of bright loudspeaker enclosure.As seen from Figure 6, the frequency response curve of the elastic cover plate 6 of loudspeaker enclosure 100 of the present invention In, the resonance of the back cavity 102 substantially weakens, and intermediate frequency frequency response valley point gets a promotion, and tool improves significantly.

It should be noted that the flexible performance of the structure of elastic cover plate 6, may expand and shrink, and therefore, the elasticity The air pressure of the balance back cavity 102 of the acceptable part of cover plate 6, plays a part of equilibrium air pressure.

In the loudspeaker enclosure 100 of the present invention, the resonant frequency of the elastic cover plate 6 is 300~12000Hz, i.e., described bullet Property cover plate 6 absorb resonant frequency be 300~12000Hz vibration energy, intermediate frequency can be reduced because back cavity resonance causes frequency response paddy Point problem.

In correlation technique, the resonant frequency as caused by back cavity is 1~2KHz, therefore, can with reference to Fig. 4 in present embodiment Know, the resonant frequency of the more excellent selection elastic cover plate 6 is 800~3000Hz.The frequency range is for weakening the humorous of the back cavity Shake, have the function that the sensitivity of lift portion frequency is the most obvious.

It should be noted that the setting of the elastic cover plate 6 is to absorb under the particular resonant frequency of the back cavity 102 Vibration energy, therefore, the elastic cover plate 6 is not limited to the setting of its position, as long as its setting is straight with the back cavity 102 Connect in succession touch, therefore, the through-hole section 5 can be located at the lower cover 1 or the upper lid 2, as long as with the back cavity 102 Directly connect, this is all feasible.When the through-hole section 5 is set through the lower cover 1 and is connected with the back cavity 102, institute The lid completely of elastic cover plate 6 is stated to set the through-hole section 5 and be fixed on the lower cover 2.

Above-described is only embodiments of the present invention, it should be noted here that for one of ordinary skill in the art For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to the protection model of the present invention Enclose.

Claims

1. a kind of loudspeaker enclosure, including the housing with receiving space and the sounding monomer being contained in the receiving space, institute To state sounding monomer and the receiving space is separated into ante-chamber and the back cavity relative with the ante-chamber, the ante-chamber is in communication with the outside, It is characterized in that：The position that the back cavity is corresponded on the housing is provided with the through-hole section for running through housing, and the loudspeaker enclosure also wraps The elastic cover plate that the through-hole section is connected and be completely covered with the housing is included, the elastic cover plate is used to absorb particular resonance frequency The energy of vibration under rate, the Young's modulus or intensity of the elastic cover plate are less than the Young's modulus or intensity of the housing.

2. loudspeaker enclosure according to claim 1, it is characterised in that：The housing includes lower cover, common with the lower cover Surround the upper lid of the receiving space and be formed at the upper lid be in communication with the outside lead sound passage, the sounding monomer and The upper lid surrounds the preceding operatic tunes jointly, and the preceding operatic tunes connects with the sound passage of leading and is collectively forming the ante-chamber, the hair Sound monomer surrounds the back cavity jointly with the upper lid and the lower cover.

3. loudspeaker enclosure according to claim 2, it is characterised in that：The through-hole section is set through the upper lid, described Elastic cover plate is fixed on the upper lid.

4. loudspeaker enclosure according to claim 2, it is characterised in that：The through-hole section is set through the lower cover, described Elastic cover plate is fixed on the lower cover.

5. loudspeaker enclosure according to claim 1, it is characterised in that：The elastic cover plate passes through double-colored note with the housing Modeling or hot pressing or stickup or ultrasonic bonding form a fixed connection.

6. according to the loudspeaker enclosure described in claim 1-5 any one, it is characterised in that：The elastic cover plate absorbs resonance frequency Rate is the energy of 300~12000Hz vibration.

7. loudspeaker enclosure according to claim 6, it is characterised in that：The elastic cover plate absorb resonant frequency be 800~ The energy of 3000Hz vibration.

8. loudspeaker enclosure according to claim 1, it is characterised in that：The elastic cover plate is TPU or MCP or silica gel system Into.