CN204697283U

CN204697283U - Microspeaker

Info

Publication number: CN204697283U
Application number: CN201520363066.7U
Authority: CN
Inventors: 韩志磊; 朱婷
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2015-05-30
Filing date: 2015-05-30
Publication date: 2015-10-07
Anticipated expiration: 2025-05-30

Abstract

The utility model discloses a kind of Microspeaker, comprise magnetic circuit system, vibrational system and auxiliary system, the protecgulum that auxiliary system comprises shell and matches with shell, the inside of shell/be combined with metal component structure on the surface, metalwork comprises metalwork body, the side of metalwork body is respectively arranged with the bending part extended to side wall of outer shell direction, the sidewall contact of bending part and shell, and the side wrapping magnetic circuit system.Microspeaker of the present utility model, magnetic circuit side is shielded by metal component structure, significantly can reduce the leakage field of magnet, the impact of miscellaneous part on terminal installation is reduced under the prerequisite ensureing speaker product performance, improve versatility and the range of application of Microspeaker product itself, also strengthen the compatibility with the complete machine parts of its assembling simultaneously.

Description

Microspeaker

Technical field

The utility model relates to electroacoustic field, is specifically related to a kind of Microspeaker.

Background technology

Current, along with the development of scientific and technological progress and electron trade, the miniaturization of electronic products such as mobile phone, thinning tendency more highlight, and the application of Microspeaker is also more and more extensive.Microspeaker generally includes magnetic circuit system, vibrational system and auxiliary system, wherein, magnetic circuit system comprises magnetic conductive board and magnet and washer, vibrational system comprises vibrating diaphragm and voice coil loudspeaker voice coil, the protecgulum that auxiliary system then comprises shell and cooperatively interacts with shell, vibrational system and magnetic circuit system are contained within the cavity that protecgulum and shell formed.The lead-in wire of voice coil loudspeaker voice coil is generally by conducting structure and external circuit conducting, like this, after voice coil loudspeaker voice coil receives outside AC signal, the motion of the reciprocating cutting magnetic line of force can be done under the effect of electromagnetic field, drive and be attached thereto the diaphragm oscillations connect, thus outwardly radiative acoustic wave, electric energy conversion is acoustic energy the most at last.

Existing Microspeaker, there is magnet in monomer inside, product, after terminal installation such as loading mobile phone, PDA etc., due to the existence meeting service behaviour affecting other assemblies in terminal installation in various degree of magnet, thus causes the compatibility of complete machine parts to decline.Based on this problem, be necessary to improve existing Microspeaker structure, to shield its magnetic disturbance to miscellaneous part in terminal installation.

Utility model content

Technical problem to be solved in the utility model is: provide a kind of Microspeaker, increase metal component structure on its housing, and this metal component structure can reduce the leakage field of loudspeaker monomer internal magnet, thus shields its magnetic disturbance to complete machine miscellaneous part.

To achieve these goals, the utility model by the following technical solutions: a kind of Microspeaker, comprises magnetic circuit system, vibrational system and auxiliary system; The protecgulum that described auxiliary system comprises shell and matches with described shell, wherein, the inside of described shell/be combined with metal component structure on the surface; Described metalwork comprises metalwork body; The side of described metalwork body is respectively arranged with the bending part extended to described side wall of outer shell direction; The sidewall contact of described bending part and described shell, and the side wrapping described magnetic circuit system.

Improve as one, described shell is plastic casing; Described metalwork is steel disc.

Improve as one, described metalwork body and described bending part are rectangular configuration; Described metalwork body forms the first plane of described metalwork; Described bending part forms the second plane of described metalwork; Described second plane orthogonal in described first plane, and is connected with described first plane smooth transition.

Improve as one, described metalwork is integral type structure, is incorporated into the surface of described side wall of outer shell; The position of the corresponding described bending part of described side wall of outer shell is provided with escape groove; Described bending part is in described escape groove; Described metalwork and described shell are fixed by being coated with glue bond.

Improve as one, described metalwork is exposed to the outside of described Microspeaker; Four sides of four described magnetic circuit systems of bending part correspondence parcel of described metalwork.

Improve as one, described metalwork is split-type structural, is incorporated into described enclosure, with described shell integrated injection molding.

Improve as one, described metalwork comprises the first metalwork and the second metalwork that are separated from each other; Three bending parts that described first metalwork comprises the first metalwork body and extends to described side wall of outer shell direction from three sides of described first metalwork body; The bending part that described second metalwork comprises the second metalwork body and extends to described side wall of outer shell direction from a side of described second metalwork body.

Improve as one, three sides of three described magnetic circuit systems of bending part correspondence parcel of described first metalwork; Another side of the described magnetic circuit system of bending part correspondence parcel of described second metalwork.

Improve as one, described magnetic circuit system comprises magnetic conductive board and is fixed on magnet and the washer on described magnetic conductive board surface; Four blocks of limit magnet that described magnet comprises centring magnet and arranges around described centring magnet periphery; The surface of described centring magnet and described four blocks of limit magnet is coated with center washer and limit washer respectively.

As one improve, described vibrational system comprise vibrating diaphragm and with described vibrating diaphragm bond fix voice coil loudspeaker voice coil; The centre position of described vibrating diaphragm is combined with reinforcement part.

Compared to existing technologies, Microspeaker of the present utility model, the inside of its shell or be combined with metal component structure on the surface, metalwork comprises metalwork body, the side of metalwork body is respectively arranged with the bending part extended to side wall of outer shell direction, bending part wraps the side of magnetic circuit system, this kind of structural design is shielded by metalwork in monomer magnetic circuit side, significantly can reduce the leakage field of magnet, reduce under the prerequisite ensureing monomer performance monomer on terminal installation in the impact of miscellaneous part, improve versatility and the range of application of monomer itself, also strengthen the compatibility with the complete machine parts of its assembling simultaneously.

Accompanying drawing explanation

Fig. 1 is the schematic appearance of the utility model embodiment one Microspeaker structure;

Fig. 2 is the vertical view of the utility model embodiment one Microspeaker structure;

Fig. 3 is the cutaway view of Fig. 2 along A-A line;

Fig. 4 is the stereogram of the utility model embodiment one Microspeaker metal component structure;

Fig. 5 is the vertical view of the utility model embodiment one Microspeaker metal component structure;

Fig. 6 is the cutaway view of Fig. 5 along B-B line;

Fig. 7 is the schematic appearance of the utility model embodiment two Microspeaker structure;

Fig. 8 is the vertical view of the utility model embodiment two Microspeaker structure;

Fig. 9 is the cutaway view of Fig. 8 along C-C line;

Figure 10 is the schematic diagram of the utility model embodiment two Microspeaker metalwork and shell assembly process;

Figure 11 is the vertical view after the utility model embodiment two Microspeaker metalwork and shell assembly;

Figure 12 is the cutaway view of Figure 11 along D-D line;

Reference numeral wherein comprises: 1, magnetic conductive board, and 2, centring magnet, 3, center washer, 4, limit magnet, 5, limit washer, 6, vibrating diaphragm, 7, voice coil loudspeaker voice coil, 8, reinforcement part, 9, metalwork, 9 ', metalwork, 9a, the first metalwork, 9b, the second metalwork, 91, metalwork body, the 91 ', first metalwork body, the 911, second metalwork body, 92, bending part, 93, level and smooth cambered surface, 94, protuberance, 10, protecgulum, 11, shell, 111, escape groove, 12, conducting terminal.

Embodiment

Below in conjunction with accompanying drawing, describe the utility model content in detail:

Embodiment one:

Consult Fig. 1, Fig. 2 and Fig. 3 jointly shown in, shown in present embodiment is a kind of Microspeaker of multipath magnetic circuit structure, it comprises magnetic circuit system, vibrational system and auxiliary system, wherein, magnetic circuit system comprises magnetic conductive board 1 and is fixed on magnet and the washer on magnetic conductive board 1 surface, in the present embodiment, four blocks of limit magnet 4 that magnet comprises centring magnet 2 and arranges around the periphery of centring magnet 2, the surface coverage of centring magnet 2 have the surface of center washer 3, four blocks of limit magnet 4 respectively correspondence be coated with limit washer 5.Vibrational system comprises vibrating diaphragm 6 and to bond fixing voice coil loudspeaker voice coil 7 with vibrating diaphragm 6.During enforcement, arrange certain distance between centring magnet 2 and limit magnet 4, form magnetic gap, the end of voice coil loudspeaker voice coil 7 is placed in above-mentioned magnetic gap.In addition, in order to strengthen the acoustical behavior of Microspeaker product at high frequency treatment, the centre position of vibrating diaphragm 6 is combined with reinforcement part 8.The auxiliary system of Microspeaker comprises protecgulum 10 and shell 11, and vibrational system and magnetic circuit system are all contained in protecgulum 10 and coordinate with shell 11 in the cavity that formed.On shell 11, injection moulding is combined with conducting terminal 12, the wire bonds of conducting terminal 12 and voice coil loudspeaker voice coil 7, for connecting vibrational system and external circuit, the current signal of external circuit is passed to voice coil loudspeaker voice coil 7 by conducting terminal 12, voice coil loudspeaker voice coil 7 is subjected to displacement variation under the effect of electromagnetic field, drive the vibration of vibrating diaphragm 6, thus instigate air sounding, complete electric energy to sound transformation of energy.

Consult Fig. 4, Fig. 5 and Fig. 6 jointly shown in, the Microspeaker shown in present embodiment, the surface of its shell 11 is combined with metalwork 9, and specifically, metalwork 9 is incorporated into the surface of shell 11 sidewall, and it is fixing to be bondd by gluing and shell 11.Wherein, shell 11 is plastic casing, and metalwork 9 is steel disc.Metalwork 9 is integral type structure, comprise metalwork body 91, bending part 92 is had respectively to the sidewall direction of shell 11 is extended from four sides of metalwork body 91, also can be understood as, metalwork 9 comprises two planes, and metalwork body 91 forms the first plane, and bending part 92 forms the second plane, can see from diagram, the second plane orthogonal in the first plane, and is connected by the smoothing transition of level and smooth cambered surface 93.Metalwork 9 in present embodiment is exposed to the outside of Microspeaker, and it contacts with four sidewalls of shell 11, and four bending parts 92 wrap four sides of magnetic circuit system just.

Pass through technique scheme, magnetic circuit side is shielded by metalwork 9, significantly can reduce the leakage field of magnet, the impact of miscellaneous part on terminal installation is reduced under the prerequisite ensureing speaker product performance, improve versatility and the range of application of Microspeaker product itself, also strengthen the compatibility with the complete machine parts of its assembling simultaneously.

Side due to metalwork 9 is provided with bending part 92, four sidewalls of the shell 11 thus combined with it need to design corresponding avoiding structure, in the present embodiment, the position of the corresponding bending part 92 of sidewall of shell 11 is provided with escape groove 111, and bending part 92 is positioned at escape groove 111.It should be noted that, because existing Microspeaker product mostly is square, the global design of its magnetic circuit is generally rectangular, considers the realization of magnetic screen function, metalwork 9 should design according to magnetic circuit, and namely metalwork body 91 and bending part 92 are rectangular configuration.

Embodiment two:

Consult Fig. 7, Fig. 8 and Fig. 9 jointly shown in, the Microspeaker of present embodiment comprises magnetic circuit system, vibrational system and auxiliary system equally, and magnetic circuit system is identical with embodiment one with the structural design of vibrational system, and its difference is:

As Figure 10, Figure 11 and Figure 12 jointly shown in, in present embodiment, the metalwork 9 ' for shielding magnetic disturbance is incorporated into the inside of shell 11, with shell 11 integrated injection molding.

In present embodiment, metalwork 11 is split-type structural, comprise the first metalwork 9a and the second metalwork 9b that are separated from each other, first metalwork 9a comprise the first metalwork body 91 ' and from three sides of the first metalwork body 91 ' to three bending parts 92, second metalwork 9b that shell 11 sidewall direction extends comprise the second metalwork body 911 and from a side of the second metalwork body 911 to the bending part 92 that the sidewall direction of shell 11 extends.Wherein, three sides of three bending part 92 correspondence parcel magnetic circuit systems of the first metalwork 9a, another side of the bending part 92 correspondence parcel magnetic circuit system of the second metalwork 9b, thus reduce product leakage field.

In addition, in the present embodiment, why metalwork 9 ' is split-type structural, is because be provided with the wire lead slot of the lead-in wire taking voice coil loudspeaker voice coil 7 in the region that the first metalwork 9a and the second metalwork 9b is separated, that is, the design of this Split type structure is actual makes corresponding dodging for wire lead slot; Moreover, the bight of the first metalwork body 91 ' is also provided with protuberance 94, arranging of protuberance 94 is on the one hand intensity in order to strengthen this structure, on the other hand, the first metalwork 9a is when injection moulding, and protuberance 94 also connects material level as injection moulding and exists, this is due in this configuration, the side of the first metalwork body 91 ' is all provided with the bending part 92 that the sidewall direction to shell 11 extends, and thus cannot adding and connect material, can only be arranged at corner positions by connecting material level.

These are only the utility model case study on implementation, be not limited to the utility model, as long as those of ordinary skill in the art modify or change according to the equivalence that the utility model institute disclosure is done, all should include in the protection range recorded in claims.

Claims

1. a Microspeaker, comprises magnetic circuit system, vibrational system and auxiliary system; The protecgulum that described auxiliary system comprises shell and matches with described shell, is characterized in that: the inside of described shell/be combined with metal component structure on the surface; Described metalwork comprises metalwork body; The side of described metalwork body is respectively arranged with the bending part extended to described side wall of outer shell direction; The sidewall contact of described bending part and described shell, and the side wrapping described magnetic circuit system.

2. Microspeaker according to claim 1, is characterized in that: described shell is plastic casing; Described metalwork is steel disc.

3. Microspeaker according to claim 1, is characterized in that: described metalwork body and described bending part are rectangular configuration; Described metalwork body forms the first plane of described metalwork; Described bending part forms the second plane of described metalwork; Described second plane orthogonal in described first plane, and is connected with described first plane smooth transition.

4. Microspeaker according to claim 3, is characterized in that: described metalwork is integral type structure, is incorporated into the surface of described side wall of outer shell; The position of the corresponding described bending part of described side wall of outer shell is provided with escape groove; Described bending part is in described escape groove; Described metalwork and described shell are fixed by being coated with glue bond.

5. Microspeaker according to claim 4, is characterized in that: described metalwork is exposed to the outside of described Microspeaker; Four sides of four described magnetic circuit systems of bending part correspondence parcel of described metalwork.

6. Microspeaker according to claim 3, is characterized in that: described metalwork is split-type structural, is incorporated into described enclosure, with described shell integrated injection molding.

7. Microspeaker according to claim 6, is characterized in that: described metalwork comprises the first metalwork and the second metalwork that are separated from each other; Three bending parts that described first metalwork comprises the first metalwork body and extends to described side wall of outer shell direction from three sides of described first metalwork body; The bending part that described second metalwork comprises the second metalwork body and extends to described side wall of outer shell direction from a side of described second metalwork body.

8. Microspeaker according to claim 7, is characterized in that: three sides of three described magnetic circuit systems of bending part correspondence parcel of described first metalwork; Another side of the described magnetic circuit system of bending part correspondence parcel of described second metalwork.

9. Microspeaker according to claim 1, is characterized in that: described magnetic circuit system comprises magnetic conductive board and is fixed on magnet and the washer on described magnetic conductive board surface; Four blocks of limit magnet that described magnet comprises centring magnet and arranges around described centring magnet periphery; The surface of described centring magnet and described four blocks of limit magnet is coated with center washer and limit washer respectively.

10. Microspeaker according to claim 1, is characterized in that: described vibrational system comprises vibrating diaphragm and to bond fixing voice coil loudspeaker voice coil with described vibrating diaphragm; The centre position of described vibrating diaphragm is combined with reinforcement part.