CN203984679U

CN203984679U - Microspeaker

Info

Publication number: CN203984679U
Application number: CN201420400241.0U
Authority: CN
Inventors: 葛连山; 朱婷
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2014-07-18
Filing date: 2014-07-18
Publication date: 2014-12-03
Anticipated expiration: 2024-07-18

Abstract

The utility model discloses a kind of Microspeaker, relate to electro-acoustic product technical field, comprise the protecgulum and the shell that combine, in the space that described protecgulum and shell surround, contain vibrational system and magnetic circuit system, described magnetic circuit system comprises the basin frame being fixed on described shell and is fixed on successively magnet and the washer of described basin frame inner side, between described basin frame and described shell, be formed with rear sound hole, the position in corresponding described rear sound hole, described shell inner side is provided with the boss extending to described enclosure, between described boss and described basin frame, form the gas passage for pass in and out described loud speaker inner chamber by the air-flow in described rear sound hole.The utility model Microspeaker has solved unstable, the anti-foreign matter weak effect of loud speaker Q value in prior art, high in cost of production technical problem, and the anti-foreign matter of the utility model loud speaker is effective, and production cost is low, and production efficiency is high, and acoustical behavior is better simultaneously.

Description

Microspeaker

Technical field

The utility model relates to electro-acoustic product technical field, particularly a kind of Microspeaker.

Background technology

Microspeaker is the important acoustic element of portable electric appts, for completing the conversion between the signal of telecommunication and voice signal, is a kind of energy conversion device.Existing Microspeaker generally includes the protecgulum and the shell that combine, contains vibrational system and magnetic circuit system in the space that protecgulum and shell surround.For the air pressure inside of balance loud speaker, sound hole after needing to leave between magnetic circuit system and shell, but after the design in sound hole can make foreign matter materials such as () dust particles enter into inside loudspeakers from rear sound hole, cause loud speaker to produce noise etc. bad or directly lost efficacy.For fear of above-mentioned technical problem, technical staff conventionally can paste damping cloth and prevent that foreign matter from entering into inside loudspeakers at rear sound hole place, but pasting damping cloth can cause following two kinds of technological deficiencies:

If a damping cloth percent opening (is that unit are endoporus is more greatly, the size in hole is less), damping and amortization can increase, and affects Q value (the quality factor of loud speaker, one group of parameter of loud speaker damping coefficient is described), thus the acoustical behavior of loud speaker reduced.

If two damping cloth percent openings little (be that unit are endoporus is less, the size in hole is larger), do not have the effect of anti-foreign matter, also can increase the cost of loud speaker.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of Microspeaker, and the anti-foreign matter of this Microspeaker is effective, and acoustical behavior is good, and production cost is low.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A kind of Microspeaker, comprise the protecgulum and the shell that combine, in the space that described protecgulum and shell surround, contain vibrational system and magnetic circuit system, described magnetic circuit system comprises the basin frame being fixed on described shell and is fixed on successively magnet and the washer of described basin frame inner side, between described basin frame and described shell, be formed with rear sound hole, the position in corresponding described rear sound hole, described shell inner side is provided with the boss extending to described enclosure, between described boss and described basin frame, form the gas passage for pass in and out described loud speaker inner chamber by the air-flow in described rear sound hole.

Wherein, described magnet and washer comprise the internal magnet and the interior washer that are fixed on described basin frame centre position, also comprise the limit magnet and the limit washer that are fixed on the position, both sides of the edge that described basin frame is relative, the length of described limit washer is greater than the length of described limit magnet, and described limit washer grows between the position of described limit magnet and described boss and described basin frame and formed described gas passage.

Wherein, described boss exceeds the surface of described limit washer near the surface of described basin frame side.

Wherein, the position that described limit washer grows described limit magnet is provided with the portion that dodges that lacks material formation, described in described boss is positioned at, dodges portion.

Wherein, described basin frame is rectangular configuration, is equipped with described rear sound hole between four bights of described basin frame and described shell.

Wherein, described shell is also rectangular configuration, and the both sides that described shell is relative are respectively provided with a connection shell fragment, and two described connection shell fragments are all electrically connected the external circuit of described vibrational system and described loud speaker.

Wherein, two described connection shell fragments are all fixed on described shell by buckle structure.

Wherein, described buckle structure comprise be arranged on the buckle at described connection shell fragment two ends and be arranged on described shell relevant position with the suitable draw-in groove of described buckle.

Adopted after technique scheme, the beneficial effects of the utility model are:

Because the position in sound hole after the shell inner side correspondence of the utility model Microspeaker is provided with the boss extending to enclosure, between boss and basin frame, form the gas passage for the air-flow turnover loud speaker inner chamber by rear sound hole.As shown in Figure 4, the arrow 70 in figure is the air current flow track of turnover loud speaker inner chamber.It is a circuitous configuration that the design of visible boss makes the rear sound hole gas passage of the utility model loud speaker, air-flow will be turned round and just can enter into inside loudspeakers after being entered from rear sound hole, the foreign matter entering with air-flow is because the effect of self gravitation can be deposited in air-flow corner, and can not enter in the magnetic gap of loud speaker, effectively prevent that loud speaker from producing the bad generation of noise or inefficacy because entering foreign matter.Therefore the utility model just has good anti-foreign matter effect in the situation that not using damping cloth, also can not affect the Q value of product, and reduce production cost simultaneously.Also reduce the operation of pasting together damping cloth simultaneously, improved production efficiency.

In sum, the utility model Microspeaker has solved unstable, the anti-foreign matter weak effect of loud speaker Q value in prior art, high in cost of production technical problem, the anti-foreign matter of the utility model loud speaker is effective, production cost is low, and production efficiency is high, and acoustical behavior is better simultaneously.

Brief description of the drawings

Fig. 1 is the stereo decomposing structural representation of the utility model Microspeaker;

Fig. 2 is the constitutional diagram of Fig. 1;

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

Fig. 4 is the B portion enlarged drawing of Fig. 3;

Fig. 5 is the structural representation of Fig. 1 housing;

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

In figure: 10, protecgulum, 20, shell, 22, boss, 30, ball top, 32, vibrating diaphragm, 34, voice coil loudspeaker voice coil, 40, basin frame, 420, internal magnet, 422, limit magnet, 440, interior washer, 442, limit washer, 444, dodge portion, 50, connect shell fragment, 52, buckle, 60, rear sound hole, 70, arrow.

Embodiment

Below in conjunction with drawings and Examples, further set forth the utility model.

As shown in Fig. 1 and Fig. 2 are common, a kind of Microspeaker, is rectangular configuration, comprises the protecgulum 10 and the shell 20 that combine, in the space that protecgulum 10 and shell 20 surround, contains vibrational system and magnetic circuit system, and magnetic circuit system is exposed to the outside of shell 20.

As shown in Fig. 1 and Fig. 3 are common, vibrational system comprises that edge is fixed on the vibrating diaphragm 32 between protecgulum 10 and shell 20, vibrating diaphragm 32 is fixed with ball top 30 near the middle part of a side of protecgulum 10, and the opposite side of vibrating diaphragm 32 is fixed with voice coil loudspeaker voice coil 34, and the coiling tap of voice coil loudspeaker voice coil 34 is voice coil leads.Magnetic circuit system comprises the basin frame 40 being fixed on shell 20, basin frame 40 comprises the bottom of rectangle, the relative position, both sides of the edge of bottom is provided with the side with bottom vertical, the center of bottom is fixed with internal magnet 420 and interior washer 440 successively, and the relative position, both sides of the edge that basin frame 40 bottoms are not provided with side is all fixed with limit magnet 422 and limit washer 442 successively.Between internal magnet 420 and interior washer 440 and limit magnet 422 and limit washer 442, be provided with magnetic gap, the end of voice coil loudspeaker voice coil 34 is positioned at magnetic gap.Voice coil loudspeaker voice coil 34 does reciprocal cutting magnetic line movement according to the size and Orientation of the alternating current by its coiling in magnetic gap, and vibrating diaphragm 32 vibrates along with the reciprocating motion of voice coil loudspeaker voice coil 34, instigates air sounding, thereby completes the power conversion between electroacoustic.

As shown in Figure 2, after Microspeaker assembling, the bottom of basin frame 40 is exposed in the outside of shell 20, between four bights of basin frame 40 and shell 20, is equipped with rear sound hole 60.

As shown in Fig. 4, Fig. 5 and Fig. 6 are common, rear sound hole 60 is for the air pressure inside and outside balance loud speaker, but some foreign matters also can enter in the magnetic gap of loud speaker from rear sound hole 60, thereby cause loud speaker to have noise or inefficacy, in order to prevent that foreign matter from entering in magnetic gap from rear sound hole 60, inventor improves the structure of shell 20.Behind corresponding four of shell 20 inner sides the position in sound hole 60 respectively increased by one all unsettled in shell 20 to inner 22, four boss 22 of boss that extend of shell 20, the both side surface of boss 22 is respectively lower than the both sides end face of shell 20.Limit magnet 422 and limit washer 442 are between two boss 22, and two boss 22 structures that are positioned at same magnet 422 on one side and limit washer 442 two ends are identical, and are symmetrical arranged.The length of limit washer 442 is greater than the length of limit magnet 422, and limit magnet 422 is positioned at the centre position of limit washer 442, and the two ends of limit washer 442 all grow the two ends (as shown in Fig. 1 and Fig. 3 are common) of limit magnet 422.The position that limit washer 442 grows limit magnet 422 is equipped with the portion of dodging 444 (as shown in Figure 1), install into rear boss 22 in set of speakers and be positioned at the portion of dodging 444, can effectively save the inner space of loud speaker, and boss 22 towards rear sound hole 60, the side surface of (towards basin frame 40) exceeds the surface of limit washer 442.Limit washer 442 grows between the position of limit magnet 422 and boss 22 and basin frame 40 and has formed the gas communication passage that passes in and out loud speaker inner chamber by rear sound hole 60, as shown in the arrow 70 in Fig. 4, air-flow enters after encountering limit washer 442 and turns round from rear sound hole 60, enters loud speaker inner chamber by the gas passage between limit washer 442, boss 22 and basin frame 40.The foreign matter that enters into inside loudspeakers with air-flow from rear sound hole 60 can be deposited at air-flow corner the surface of limit washer 442 under the effect at gravity, and be stored in there, and can not enter in magnetic gap along with air-flow, thereby effectively avoid causing loud speaker to produce the situation generation of noise or inefficacy because entering foreign matter in magnetic gap, ensure the acoustical behavior of loud speaker, extended the useful life of loud speaker.Because the surface of boss 22 exceeds the surface of limit washer 442, formed a nest shape structure at limit washer 442 places again, the foreign matter that can prevent from being deposited on limit washer 442 enters in magnetic gap, has further improved the anti-foreign matter effect of the utility model loud speaker.

As shown in Fig. 1 and Fig. 2 are common, the relative position, both sides of the edge of shell 20 is respectively provided with one and connects shell fragment 50, connect the bearing of trend of shell fragment 50 and the bearing of trend of limit magnet 422 perpendicular, connect shell fragment 50 for being electrically connected the external circuit of voice coil leads and loud speaker.Two connection shell fragments 50 are all fixed on shell 20 by buckle structure, and buckle structure comprises the buckle 52 that is arranged on connection shell fragment 50 two ends, also comprises the draw-in groove (not shown) matching with buckle 52 that is arranged on shell 20 relevant positions.Connect between shell fragment 50 and shell 20 and fix by the mode of buckle, simplified the assembling procedure of loud speaker, make the assembly working of loud speaker simple to operation.

The utility model is not only confined to the Microspeaker of said structure by the technical scheme that changes shell mechanism and prevent that foreign matter from entering magnetic gap from rear sound hole, it is applicable to any rear sound hole and is located in the Microspeaker between basin frame and shell, those skilled in the art are according to the elaboration of this specification, not needing to pay creative work can realize, therefore the embodiment being applied in other structure mini loud speaker about the technical solution of the utility model describes in detail no longer one by one at this.While is regardless of the structure of Microspeaker; no matter also the structure of boss how; as long as changing from the direction of the air-flow of rear sound hole turnover inside loudspeakers by changing the structure of shell, thereby prevent that the product that foreign matter enters in the magnetic gap of loud speaker from all falling in protection range of the present utility model.

The utility model is not limited to above-mentioned concrete execution mode, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done, within all dropping on protection range of the present utility model.

Claims

1. Microspeaker, comprise the protecgulum and the shell that combine, in the space that described protecgulum and shell surround, contain vibrational system and magnetic circuit system, described magnetic circuit system comprises the basin frame being fixed on described shell and is fixed on successively magnet and the washer of described basin frame inner side, between described basin frame and described shell, be formed with rear sound hole, it is characterized in that, the position in corresponding described rear sound hole, described shell inner side is provided with the boss extending to described enclosure, between described boss and described basin frame, form the gas passage for pass in and out described loud speaker inner chamber by the air-flow in described rear sound hole.

2. Microspeaker according to claim 1, it is characterized in that, described magnet and washer comprise the internal magnet and the interior washer that are fixed on described basin frame centre position, also comprise the limit magnet and the limit washer that are fixed on the position, both sides of the edge that described basin frame is relative, the length of described limit washer is greater than the length of described limit magnet, and described limit washer grows between the position of described limit magnet and described boss and described basin frame and formed described gas passage.

3. Microspeaker according to claim 2, is characterized in that, described boss exceeds the surface of described limit washer near the surface of described basin frame side.

4. Microspeaker according to claim 3, is characterized in that, the position that described limit washer grows described limit magnet is provided with the portion that dodges that lacks material formation, described in described boss is positioned at, dodges portion.

5. according to the Microspeaker described in the arbitrary claim of claim 1 to 4, it is characterized in that, described basin frame is rectangular configuration, is equipped with described rear sound hole between four bights of described basin frame and described shell.

6. Microspeaker according to claim 5, it is characterized in that, described shell is also rectangular configuration, and the both sides that described shell is relative are respectively provided with a connection shell fragment, and two described connection shell fragments are all electrically connected the external circuit of described vibrational system and described loud speaker.

7. Microspeaker according to claim 6, is characterized in that, two described connection shell fragments are all fixed on described shell by buckle structure.

8. Microspeaker according to claim 7, is characterized in that, described buckle structure comprise be arranged on the buckle at described connection shell fragment two ends and be arranged on described shell relevant position with the suitable draw-in groove of described buckle.