CN202496057U - Loudspeaker, and magnetic yoke thereof and magnetic loop structure thereof - Google Patents

Abstract

Provided is a loudspeaker, and a magnetic yoke thereof, a magnetic loop structure thereof. The magnetic yoke comprises a bottom plate which is made of a magnetic conductive material, a cushion block which is made of a magnetic conductive material and is fixed on the bottom plate, and a sidewall. The sidewall is made of a magnetic conductive material, is around the bottom plate and the cushion block and a gap is formed between the sidewall and the cushion block. In comparison with the prior art, the cushion block is used for replacing or partially replacing the convex part of the existing magnetic yoke, a cutting depth of a magnetic yoke groove is reduced, control on size error, flatness and burr is easier such that the magnetic yoke has the advantages of a comparatively simple manufacturing process, a short processing cycle and low manufacturing cost.

Description

Loud speaker and yoke thereof, magnetism loop structure

Technical field

The utility model relates to a kind of loud speaker, also relates to a kind of yoke, magnetism loop structure of loud speaker.

Background technology

Loud speaker is claimed " loudspeaker " again, is a kind of ten minutes electro-acoustic transducer device commonly used.Fig. 1 is the structural representation of existing a kind of loud speaker, and is as shown in Figure 1, and by permeability magnetic material, the top board of processing like iron 1, the yoke of being processed by permeability magnetic material 2, the magnet 3 between top board 1 and yoke 2 constitute the magnetism loop structure of loud speaker.Wherein, yoke 2 plays the magnetic conduction effect in the magnetism loop structure, and it exists at interval between base plate 2a and the sidewall 2c by base plate 2a, constitute around the sidewall 2c of base plate 2a.Gap between top board 1 and the yoke 2 constitutes magnetic gap G.Between magnetic gap G, dispose voice coil loudspeaker voice coil 4, voice coil loudspeaker voice coil 4 is wrapped in the excircle of voice coil loudspeaker voice coil pipe 5 and can in magnetic gap G, vertically does the piston motion, and the interior Zhou Duan of voice coil loudspeaker voice coil pipe 5 upper ends and vibrating membrane 6 links together, and vibrating membrane 6 links together through flange 7 and support 8.

In case voice coil loudspeaker voice coil 4 is applied signal code, the voice coil loudspeaker voice coil 4 that is positioned at magnetic gap G will produce induction force, and this induction force can make voice coil loudspeaker voice coil 4 vertically move, and promptly does the piston motion, and the voice coil loudspeaker voice coil pipe 5 that connects together with voice coil loudspeaker voice coil 4 also can vertically move.Because vibrating membrane 6 links together with voice coil loudspeaker voice coil pipe 5, vertically move so can promote vibrating membrane 6, and make air vibration and then produce sound.

Loud speaker can be divided into woofer, Squawker, high pitch loudspeaker according to frequency range.Because the voice coil loudspeaker voice coil Oscillation Amplitude of woofer is very big; It is shown in Figure 1 to continue ginseng; In order to guarantee that voice coil loudspeaker voice coil 4 can not touch the bottom of yoke 2 when vibrating, can in yoke 2, process a very dark groove H through cut usually, expand the vibration area of voice coil loudspeaker voice coil 4 with in the vertical direction.Because the degree of depth of groove H is very big, makes that yoke 2 protrusions part 2b are highly also very big.Because the degree of depth of groove H is very big, narrower in width, increased the technological requirement of cut greatly, make the control difficulty more of scale error, flatness, burr, cause production technology more complicated, the process-cycle of yoke long, manufacturing cost is high.

The utility model content

The problem that the utility model will solve provides a kind of yoke; It has reduced the working depth of groove; Reduced the technological requirement of cut; Make the control of scale error, flatness, burr be more prone to, thereby make the production technology of yoke fairly simple, the process-cycle is short, low cost of manufacture.

For addressing the above problem, the utility model provides a kind of yoke that is used for loud speaker, and it comprises:

The base plate of processing by permeability magnetic material;

Process and be fixed on the cushion block of said base plate top by permeability magnetic material;

By permeability magnetic material process, around said base plate and cushion block and and said cushion block between have sidewall at interval.

Alternatively, said base plate, sidewall are one-body molded.

Alternatively, what said base plate, sidewall constituted is whole cylindrical, and said cushion block is cylindrical iron block.

Simultaneously, the utility model also provides a kind of magnetism loop structure, and it comprises:

Aforesaid yoke;

Be fixed on the magnet of said cushion block top, exist between the sidewall of said magnet and said yoke at interval;

Process and be fixed on the top board of said magnet top by permeability magnetic material, exist at interval between the sidewall of said top board and said yoke.

In addition, the utility model also provides a kind of loud speaker, and it comprises aforesaid magnetism loop structure.

Compared with prior art; The utility model utilizes cushion block to replace the bossing in the existing yoke; Reduced the cutting depth of groove in the yoke; Make the control of scale error, flatness, burr be more prone to, thereby make the production technology of yoke fairly simple, the process-cycle is short, low cost of manufacture.

Description of drawings

Fig. 1 is the structural representation of existing a kind of loud speaker.

Fig. 2 is the structural representation of yoke among the embodiment of the utility model yoke.

Fig. 3 is the structural representation of magnetism loop structure among the embodiment of the utility model magnetism loop structure.

Fig. 4 is the structural representation of loud speaker among the embodiment of the utility model loud speaker.

Embodiment

Below in conjunction with accompanying drawing, through specific embodiment, the technical scheme of the utility model is carried out clear, complete description, obviously, but described embodiment only is the part of the execution mode of the utility model, rather than they are whole.According to these embodiment, those of ordinary skill in the art need not obtainable all other execution modes under the prerequisite of creative work, all belongs to the protection range of the utility model.

Yoke plays the magnetic conduction effect in the magnetism loop structure of loud speaker, so it need utilize the permeability magnetic material with high permeability to process, like iron etc.Fig. 2 is the structural representation of yoke among the embodiment of the utility model yoke, and as shown in Figure 2, yoke 10 comprises: base plate 11, be fixed on base plate 11 tops cushion block 12, around base plate 11 and cushion block 12 and and cushion block 12 between have sidewall 13 at interval.Base plate 11, sidewall 13 are processed by the permeability magnetic material with high permeability.

Because cushion block 12 also plays the magnetic conduction effect in the magnetism loop structure, so cushion block 12 also need utilize the permeability magnetic material with high permeability to constitute.In the preferred embodiment of the utility model, cushion block 12 is an iron block.Certainly, in other embodiment of the utility model, cushion block 12 also can utilize other permeability magnetic material to process.After base plate 11 formed, industrial glue capable of using was fixed on base plate 11 tops with cushion block 12.

Base plate 11 is one-body molded with sidewall 13, to save manufacture craft.In addition, can make whole cylindrical that base plate 11 and sidewall 13 constituted, cushion block 12 is cylindrical iron block.Certainly, the shape of yoke is not limited to present embodiment in the utility model, according to the requirement of loud speaker can be to the shape of yoke corresponding adjusting, the shape of cushion block according to the shape of yoke with adjusting.

Fig. 3 is the structural representation of magnetism loop structure among the embodiment of the utility model magnetism loop structure; As shown in Figure 3; Magnetism loop structure 20 comprises: as the described yoke of front embodiment 10, be fixed on cushion block 12 tops of yoke 10 magnet 21, be fixed on the top board 22 of magnet 21 tops; Exist between the sidewall 13 of magnet 21 and yoke 10 at interval, exist at interval between the sidewall 13 of top board 22 and yoke 10, and this constitutes magnetic gap G at interval.Magnet 21 is used to produce magnetic field, and top board 22 is processed by the permeability magnetic material with high permeability, and it act as magnetic conduction, and industrial glue capable of using is sticked together magnet 21, top board 22, yoke 10.

In an embodiment of the utility model, top board 22 in the magnetism loop structure, magnet 21 can be cylindrical, and yoke 10 is roughly cylindrical.

Fig. 4 is the structural representation of loud speaker among the embodiment of the utility model loud speaker, and as shown in Figure 4, loud speaker 30 comprises: like the described magnetism loop structure of front embodiment 20, voice coil loudspeaker voice coil 31, voice coil loudspeaker voice coil pipe 32, vibrating membrane 33, flange 34, support 35.Wherein, Magnetism loop structure 20 comprises: yoke 10, be fixed on cushion block 12 tops of yoke 10 magnet 21, be fixed on the top board 22 of magnet 21 tops; Exist between the sidewall 13 of magnet 21 and yoke 10 at interval; Exist at interval between the sidewall 13 of top board 22 and yoke 10, and this constitutes magnetic gap G at interval.Between magnetic gap G, dispose voice coil loudspeaker voice coil 31; Voice coil loudspeaker voice coil 31 is wrapped in the excircle of voice coil loudspeaker voice coil pipe 32 and can in magnetic gap G, vertically does the piston motion; The interior Zhou Duan of voice coil loudspeaker voice coil pipe 32 upper ends and vibrating membrane 33 links together, and vibrating membrane 33 links together through flange 34 and support 35.

In conjunction with Fig. 2, Fig. 3, shown in Figure 4; When making the yoke that the utility model provided, after the base plate 11 of formation yoke 10, the sidewall 13, can carry out cut to yoke 10; To process a groove H that the degree of depth is very little, voice coil loudspeaker voice coil 31 can vibration vertically in groove H.Can touch the bottom of yoke 10 when excessive for fear of voice coil loudspeaker voice coil 31 Oscillation Amplitudes; Form after the groove H; Can cushion block 12 be fixed on base plate 11 tops of yoke 10; Interval between groove H and cushion block 12 and yoke 10 sidewalls 13 is the vibration area of voice coil loudspeaker voice coil 31, thereby but in the vertical direction expands the vibration area of voice coil loudspeaker voice coil 31.Map 1 can be known; The utility model utilizes cushion block to replace or partly replaces the bossing of yoke (identifying with label 2b among Fig. 1); Reduced the cutting depth of groove in the yoke; Make the control of scale error, flatness, burr be more prone to, thereby make the production technology of yoke fairly simple, the process-cycle is short, low cost of manufacture.

Above-mentioned explanation through embodiment should be able to make this area professional and technical personnel understand the utility model better, and can reproduce and use the utility model.Those skilled in the art can under the situation of essence that does not break away from the utility model and scope, do various changes to the foregoing description according to the principle described in this paper and modification is conspicuous.Therefore, the utility model should not be understood that to be limited to the foregoing description shown in this paper, and its protection range should be defined by appending claims.

Claims (5)

1. a yoke that is used for loud speaker is characterized in that, comprising:

The base plate of processing by permeability magnetic material;

Process and be fixed on the cushion block of said base plate top by permeability magnetic material;

By permeability magnetic material process, around said base plate and cushion block and and said cushion block between have sidewall at interval.

2. yoke according to claim 1 is characterized in that, said base plate, sidewall are one-body molded.

3. yoke according to claim 1 is characterized in that what said base plate, sidewall constituted is whole cylindrical, and said cushion block is cylindrical iron block.

4. a magnetism loop structure is characterized in that, comprising:

Each described yoke of claim 1 to 3;

Be fixed on the magnet of the cushion block top of said yoke, exist between the sidewall of said magnet and said yoke at interval;

Process and be fixed on the top board of said magnet top by permeability magnetic material, exist at interval between the sidewall of said top board and said yoke.

5. loud speaker that comprises the said magnetism loop structure of claim 4.

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