CN101552938A - Portable media playing device and receiver jack - Google Patents

Abstract

The invention discloses a portable media playing device and a receiver jack. The portable media playing device comprises a casing and a built-in speaker, wherein the casing is provided with a speaker sound hole and the receiver jack, and the receiver jack is improved to be used as an inverted tube. The receiver jack of the built-in speaker is used as the inverted tube of the built-in speaker so that the receiver jack is not a leakage source influencing the sound performance but increasing the low frequency component, thereby being beneficial to the sound performance of the whole portable media device.

Description

A kind of portable media playing device and receiver J-Horner

Technical field

The present invention relates to the audio signal processing technique field, relate in particular to a kind of portable media playing device and receiver J-Horner.

Background technology

Since the network analysis theory of loud speaker (R.H.Small for example, " Direct-Radiator Loudspeaker System Analysis ", J.Audio Eng.Soc., vol.20, NUMBER5, Jun.1972; R.H.Small, " Closed-Box LoudspeakerSystems Part I:Analysis ", J.Audio Eng.Soc., vol.20 NUMBER 10 (Dec.1972); R.H.Small, " Vented-Box Loudspeaker System Part I:Small-Signal Analysis ", J.Audio Eng.Soc., vol.21 NUMBER 10 (Jun.1973)) since the proposition, electroacoustic engineering teacher common practice adopts the analogy circuit method to analyze speaker system, and explains its LF-response characteristic with filter theory.These theoretical methods have been widely used in all kinds of relatively large speaker systems, as public address, and family expenses or the like occasion.

But the Microspeaker less about yardstick, that resonance frequency is higher, research report are less relatively, and this type of loud speaker often is applied to communication field, and at some square centimeters, resonance frequency is mostly between 500Hz～1000Hz mostly for its vibrating diaphragm area.At document (MINGSIANR.BAI AND JERWEI LIAO, " Acoustic Analysis and Design ofMiniature Loudspeakers for Mobile Phones ", J.Audio Eng.Soc., Vol.53No.11, (2005 November)) in the characteristic of this type of Microspeaker that adopted analogy circuit labor, point out that its fundamental characteristics and big loud speaker do not have the difference of essence.

On the current market, all kinds of portable audio-frequence player devices, such as MP3, MP4 player etc., because of the outward appearance novelty, structure is small and exquisite, and portable characteristics are very popular.Usually these portable audio-frequence player devices are many carries out low voice speaking putting by earphone or external speaker, however along with people to the more and more higher requirement of portability and the continuous development in market, the portable media playing device of boombox also begins to enter into the market.But existing portable media device has sound leakage holes such as receiver J-Horner and/or USB (USB) interface, has influenced low voice speaking acoustical behavior of putting.

Summary of the invention

In view of this, the present invention's technical problem that will solve provides a kind of portable media playing device that can improve the low frequency performance of boombox.

Portable media playing device provided by the invention comprises housing and boombox, and loud speaker outlet sound mouth and receiver J-Horner are arranged on the housing, and described receiver J-Horner also is used as the phase-reversing tube of boombox.

Wherein, described receiver J-Horner inwall presents sealing and uniform tubulose.For example, the cross section of described receiver J-Horner inwall is circle or flat, and the vertical section of described receiver J-Horner inwall is cylindricality or truncated cone shape, perhaps their combination.

According to a preferred embodiment of the present invention, during fabrication receiver J-Horner is customized to air tight and length of wall and bore and meets the phase-reversing tube requirement.

According to a preferred embodiment of the present invention, the outside wall surface of the receiver J-Horner of portable media playing device is wrapped up by plugging material, and this plugging material can be rubber or foam.Also comprise the USB socket on the housing of portable media playing device, described USB socket has plugging device.

According to another preferred embodiment of the invention, the entering tone mouth of the receiver J-Horner of portable media playing device is near described boombox.

Portable media playing device of the present invention improves self existing receiver J-Horner, uses as the phase-reversing tube of boombox, makes it no longer become the source of leaks that influences sound performance, has improved the low frequency performance of boombox.

Further, the receiver J-Horner inwall presents airtight and uniform tubulose, with the outside wall surface of receiver J-Horner by the plugging material parcel, the entering tone mouth of receiver J-Horner is equipped with measures such as plugging device near boombox, for the USB socket, further improved the low frequency performance of portable media playing device as low leakage phase inverting box.And come expansion low-frequency by self existing receiver J-Horner as the phase-reversing tube of built-in miniature loud speaker, do not increase the manufacturing cost of portable media device substantially, have good application.

Another technical problem that the present invention will solve provides a kind of receiver J-Horner.

Receiver J-Horner provided by the invention, the inwall of this receiver J-Horner forms the cavity with two ports, and receiver J-Horner also is suitable for use as phase-reversing tube.

According to an embodiment of receiver J-Horner of the present invention, this receiver J-Horner inwall presents sealing and uniform tubulose.For example, the cross section of receiver J-Horner inwall is circle or flat, and the vertical section of receiver J-Horner inwall is cylindricality or truncated cone shape.

According to another embodiment of receiver J-Horner of the present invention, the outside wall surface of receiver J-Horner is wrapped up by the plugging material such as rubber or foam.

Description of drawings

Fig. 1 is the schematic diagram that an embodiment of portable media playing device of the present invention is shown;

Fig. 2 is the profile that receiver J-Horner among the embodiment of portable media playing device of the present invention is shown;

Fig. 3 is the profile that receiver J-Horner among another embodiment of portable media playing device of the present invention is shown;

Fig. 4 is the circuit diagram that the phase inverting box acoustic analog circuit of portable media playing device is shown;

Fig. 5 is the frequency response curve that analogue system is shown;

Fig. 6 is the frequency response curve that illustrates in the actual test.

Embodiment

Basic thought of the present invention is, the receiver J-Horner of portable media device improved make it be applicable to the phase-reversing tube of boombox, thereby make housing, loud speaker and the receiver J-Horner of portable media device form the phase inverting box system together, to expand the low frequency performance of portable media device boombox.

Fig. 1 is the schematic diagram that an embodiment of portable media playing device of the present invention is shown.As shown in Figure 1, the embodiment of this portable media playing device comprises audio processing modules 10, loud speaker 12, upper shell 111 and lower house 112.Loud speaker 12 is connected with audio processing modules 10, plays according to the audio signal that receives from audio processing modules 10.What label 101 was indicated is power module, is used for providing electric power to loud speaker.During normal the use, loud speaker and audio processing modules 10 are usually located in the housing by upper shell 111 and lower house 112 be combined intos.There is loud speaker outlet sound mouth 13 position corresponding with loud speaker on the housing.In addition, receiver J-Horner 14 is arranged on the housing, it can be as the phase-reversing tube of boombox after adjusting through design.Adjustment design to receiver J-Horner can be referring to the embodiment that describes later.Have usb 15 on the housing alternatively, be the plugging device of these usb 15 outfit such as rubber stopper shutoff, to reduce the leakage of USB interface sound.The housing of portable media device has seal preferably, avoids leaking source except receiver J-Horner as far as possible.

The inwall of receiver J-Horner surrounds the cavity of a both ends open.When receiver J-Horner is used as the connector of earphone, can insert headset plug in this cavity; When not inserting headset plug, receiver J-Horner can be as the phase-reversing tube of boombox.

Fig. 2 is the profile that the receiver J-Horner inwall among the embodiment of portable media playing device of the present invention is shown.Wherein, Fig. 2 a is the vertical sectional drawing of this receiver J-Horner inwall along the direction of speaking, and Fig. 2 b is the horizontal sectional drawing of this receiver J-Horner inwall A-A direction.As shown in FIG., the receiver J-Horner internal face is pipe sealing, uniform, and its vertical tangent plane is a cylindricality, and laterally tangent plane is circular.

The inwall of receiver J-Horner also can adopt other shape.Fig. 3 illustrates the profile of the receiver J-Horner inwall among another embodiment of portable media playing device of the present invention.Wherein, Fig. 3 a is the vertical sectional drawing of this receiver J-Horner inwall along the direction of speaking, and Fig. 3 b is the horizontal sectional drawing of this receiver J-Horner inwall A-A direction.As shown in FIG., the receiver J-Horner internal face is airtight, smooth truncated cone shape pipe, and its vertical tangent plane is a truncated cone shape, and laterally tangent plane is oval.

The shape that those skilled in the art will appreciate that receiver J-Horner inwall of the present invention is not limited to the above embodiments and their combination.Any low frequency performance that can improve boombox and shape that can satisfy the receiver J-Horner needs according to the Principles of Acoustics design all belongs to the scope of protection of present invention.

According to one embodiment of present invention, the outside wall surface of receiver J-Horner is taked the shutoff measure, for example wrap up, to guarantee the sealing of receiver J-Horner wall by materials such as rubber, foams.

Can design in conjunction with length and the bore of speaker system receiver J-Horner.According to a preferred embodiment of the present invention, receiver J-Horner has special length, the length of lengthening as required for example so that receiver J-Horner as the entering tone mouth of phase-reversing tube near built-in loud speaker.The wall that it should be noted that receiver J-Horner should directly not blocked the loud speaker back, and receiver J-Horner should not blocked by the loud speaker magnet steel as the entering tone mouth of phase-reversing tube yet.

According to one embodiment of present invention, during fabrication receiver J-Horner is customized to that wall is air tight, length and bore meet the phase-reversing tube requirement.For example, at first be ready to metalwork in the socket according to the size of headset plug, then (for example according to the dimensional requirement of phase-reversing tube, length and diameter etc.) the making mould, adopt the method for in-mould injection (AMD or AML) at last, metalwork is embedded in the plastics outside wall surface, guarantees that entire headset socket wall is air tight.

According to one embodiment of present invention, boombox has lower total quality factor (Qts) value, preferably has close or the Qts value between 0.2 to 0.5.

It is pointed out that portable media playing device of the present invention, except comprising special-purpose audio/video playback device such as MP3, MP4 player, can also comprise miniature electro-acoustic playback equipments such as mobile phone, personal digital assistant, Hand Personal Computer.

Fig. 4 is the circuit diagram of the phase inverting box acoustic analog circuit of portable media playing device.Contrast three kinds of systems according to this analogy circuit: 1) fully sheathed case; 2) high-leakage phase inverting box (QL (casing leakage loss)=2); 3) the low phase inverting box (QL=10) that leaks.Fig. 5 illustrates the frequency response curve of analogue system, its transverse axis coordinate representation frequency, and ordinate of orthogonal axes is represented sound pressure level SPL (dB).Wherein, curve 3A, 3B and 3C are respectively fully sheathed case, high-leakage phase inverting box and the low frequency response curve that leaks phase inverting box.As can be seen from Figure 5 low LF-response the best of leaking phase inverting box.Fig. 6 is the frequency response curve of actual test, its transverse axis coordinate representation frequency, and ordinate of orthogonal axes is represented sound pressure level.Low leak phase inverting box corresponding to receiver J-Horner as phase-reversing tube and seal the portable set of USB interface, test result contrasts as shown in Figure 6, and 3A ', 3B ' and 3C ' are respectively fully sheathed case, high-leakage phase inverting box and the low test frequency response curve that leaks phase inverting box.As can be seen from Figure 6, the low phase inverting box that leaks has low-frequency effect preferably, and is consistent with the result of analogue system.

Portable media playing device of the present invention, self existing receiver J-Horner is improved, use, make it no longer become the source of leaks that influences sound performance as the phase-reversing tube of boombox, increase low-frequency component on the contrary, be of value to the acoustical behavior of whole portable media device.The low frequency extended method of the built-in miniature loud speaker of portable media playing device of the present invention does not increase the manufacturing cost of portable media device, and theoretical and experiment proves that all it is practicable.

Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.

Claims (18)

1. a portable media playing device comprises housing and boombox, and loud speaker outlet sound mouth and receiver J-Horner are arranged on the housing, it is characterized in that, described receiver J-Horner is also as phase-reversing tube.

2. portable media playing device as claimed in claim 1 is characterized in that, described receiver J-Horner inwall presents sealing and uniform tubulose.

3. portable media playing device as claimed in claim 2 is characterized in that, the cross section of described receiver J-Horner inwall is circle or flat, and the vertical section of described receiver J-Horner inwall is cylindricality or truncated cone shape.

4. as claim 1,2 or 3 described portable media playing devices, it is characterized in that described receiver J-Horner has length and/or the bore that is applicable to phase-reversing tube.

5. as claim 2 or 3 described portable media playing devices, it is characterized in that described receiver J-Horner forms the wall of sealing during fabrication.

6. as claim 2 or 3 described portable media playing devices, it is characterized in that the outside wall surface of described receiver J-Horner is wrapped up by plugging material.

7. portable media playing device as claimed in claim 6 is characterized in that, described plugging material is rubber or foam.

8. as claim 2 or 3 described portable media playing devices, it is characterized in that described receiver J-Horner one port is near described boombox.

9. as claim 1,2 or 3 described portable media playing devices, it is characterized in that also comprise the USB socket on the described housing, described USB socket has plugging device.

10. as claim 1,2 or 3 described portable media playing devices, it is characterized in that described housing is by upper shell and the airtight be combined into of lower house.

11., it is characterized in that described boombox has close or the total figure of merit value between 0.2 to 0.5 as claim 1,2 or 3 described portable media playing devices.

12. a receiver J-Horner, the inwall of wherein said receiver J-Horner forms the cavity with two ports, and described receiver J-Horner also is applicable to phase-reversing tube.

13. receiver J-Horner as claimed in claim 12 is characterized in that, described receiver J-Horner inwall presents sealing and uniform tubulose.

14. receiver J-Horner as claimed in claim 13 is characterized in that, the cross section of described receiver J-Horner inwall is circle or flat, and the vertical section of described receiver J-Horner inwall is cylindricality or truncated cone shape.

15., it is characterized in that described receiver J-Horner has length and/or the bore that is applicable to phase-reversing tube as any described receiver J-Horner in the claim 12 to 14.

16., it is characterized in that described receiver J-Horner forms the wall of sealing during fabrication as claim 13 or 14 described receiver J-Horners.

17., it is characterized in that the outside wall surface of described receiver J-Horner is wrapped up by plugging material as any described receiver J-Horner in the claim 12 to 14.

18. receiver J-Horner as claimed in claim 17 is characterized in that, described plugging material is rubber or foam.

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