CN212486778U - Loudspeaker and magnetic circuit system thereof - Google Patents

Abstract

The utility model provides a magnetic circuit system of a loudspeaker, which comprises a first clamping plate, a first magnetic steel arranged on the first clamping plate, and a pole core arranged at one side of the first magnetic steel, which is far away from the first clamping plate; the magnetic circuit system is characterized by further comprising a through hole penetrating through the first magnetic steel and the first clamping plate; the pole core comprises a main body part connected with the first magnetic steel and an extension part extending from the main body part to the inside of the through hole; the magnetic circuit system further comprises a coil which is positioned in the through hole and wound on the extension part, the through hole is formed in the central area of the first magnetic steel and the central area of the first clamping plate, the extension part wound with a pole core of the coil is suspended in the through hole, the coil forms an electromagnetic field after being electrified, and the magnetic field performance (BL) and the whole acoustic performance of the loudspeaker are improved by utilizing the permanent magnetic field of the first magnetic steel and the electromagnetic field of the coil.

Description

Loudspeaker and magnetic circuit system thereof

[ technical field ] A method for producing a semiconductor device

The utility model relates to a speaker field, in particular to magnetic circuit of speaker.

[ background of the invention ]

The speaker is a transducer for converting an electric signal into an acoustic signal, and is widely applied to various audio and mobile terminal devices, while the mobile phone is undoubtedly the most common mobile terminal device.

The loudspeaker usually includes magnetic circuit, vibration system and basin frame, and the magnetic circuit of current loudspeaker usually only includes the permanent magnetic field that the magnet steel formed, and the central zone magnetic conduction effect of magnetic circuit's pole piece is little, and is very little to whole magnetic circuit's magnetic field performance (BL) addition, influences the whole performance of loudspeaker. Therefore, it is necessary to provide a magnetic circuit system and a speaker with good magnetic field performance.

[ Utility model ] content

An object of the utility model is to provide a magnetic circuit and speaker with good magnetic field performance.

The technical scheme of the utility model as follows: a magnetic circuit system of a loudspeaker comprises a first clamping plate, first magnetic steel arranged on the first clamping plate, and a pole core arranged on one side of the first magnetic steel, which is far away from the first clamping plate; the magnetic circuit system also comprises a through hole penetrating through the first magnetic steel and the first clamping plate; the pole core comprises a main body part connected with the first magnetic steel and an extension part extending from the main body part to the inside of the through hole; the magnetic circuit system also comprises a coil which is positioned in the through hole and wound on the extension part.

Preferably, the magnetic circuit system further comprises a second magnetic steel which is arranged on the first clamping plate and is arranged at an interval with the first magnetic steel to form a magnetic gap.

Preferably, the through hole includes a first through hole penetrating through a central region of the first magnetic steel and a second through hole penetrating through a central region of the first clamping plate and communicating with the first through hole, and the extension portion of the pole core extends into the first through hole and the second through hole.

Preferably, the first through hole includes a first inner side surface spaced from and facing the coil, the second through hole includes a second inner side surface spaced from and facing the coil, and the first inner side surface and the second inner side surface are coplanar.

Preferably, the main body portion includes a lower surface fixed to an end of the first magnetic steel away from the first clamping plate and an upper surface opposite to the lower surface, and the extension portion extends from a central region of the lower surface toward a direction close to the first clamping plate.

Preferably, the first magnetic steel is a rectangle including two long axis sides and two short axis sides, the number of the second magnetic steel is four, and the four second magnetic steels include two second magnetic steels located on two sides of the long axis direction of the first magnetic steel and two second magnetic steels located on two sides of the short axis direction of the first magnetic steel.

Preferably, the magnetic circuit system further comprises a second clamping plate having two long axis sides and two short axis sides; a first magnetic conduction part connected with one side of the second magnetic steel, which is far away from the first clamping plate, is arranged on the long shaft side of the second clamping plate; and a second magnetic conduction part which extends inwards and is connected with one side of the second magnetic steel, which is far away from the first clamping plate, is arranged on the short shaft side of the second clamping plate.

Preferably, the magnetic circuit system further comprises two reinforcing magnetic steels respectively located on the side of the long axis of the second clamping plate, which is far away from the first clamping plate.

A loudspeaker comprising a magnetic circuit system of any of the above loudspeakers.

The beneficial effects of the utility model reside in that: through set up the through-hole in the central zone of first magnet steel and first splint to the extension of the pole piece that the suspension has the coil in the through-hole, form the electromagnetic field after the coil circular telegram, utilize the electromagnetic field of the permanent magnetic field cooperation coil of first magnet steel to promote the magnetic field performance (BL) and the whole sound performance of speaker.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of the magnetic circuit system of the present invention combined with a voice coil;

fig. 2 is an exploded view of the magnetic circuit system of the present invention combined with a voice coil;

fig. 3 is a top view of the magnetic circuit system of the present invention combined with the voice coil;

fig. 4 is a schematic sectional view taken along line a-a in fig. 3.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 4, the magnetic circuit system 100 of the speaker includes a first clamping plate 10, a second clamping plate 20, a first magnetic steel 30, a second magnetic steel 40, a pole core 50, a coil 60, and a reinforcing magnetic steel 70. First magnet steel 30 install in on the first splint 10, utmost point core 50 set up in first magnet steel 30 keeps away from first splint 10 one side, through-hole 90 runs through first magnet steel 30 with first splint 10. The pole piece 50 includes main part 51 and extension 52, main part 51 with first magnet steel 30 links to each other, and extension 52 certainly main part 51 to extend in the through-hole 90, coil 60 is located in the through-hole 90, and coil 60 twines in on the extension 52, coil 60 forms the electromagnetic field after circular telegram, cooperates the permanent magnetic field of first magnet steel 30 for the magnetic field performance (BL) of speaker can promote.

More preferably, referring to fig. 2 and 4, the first clamping plate 10 includes a second through hole 11 and a supporting portion 12, the second through hole 11 penetrates through a central area of the first clamping plate 10, and the central area of the first clamping plate 10 refers to an area near the geometric center of the first clamping plate 10. The second through hole 11 and the first through hole 31 constitute the through hole 90, the second through hole 11 communicates with the first through hole 31, and the extending portion 52 of the pole piece 50 extends into the second through hole 11. The support portion 12 is used for supporting the first magnetic steel 30 and the second magnetic steel 40.

Preferably, the first magnetic steel 30 is a rectangle including two major axis sides x and two minor axis sides y, the number of the second magnetic steel 40 is four, and the second magnetic steel 40 includes two second magnetic steels 40a located at two sides of the major axis direction of the first magnetic steel 30 and two second magnetic steels 40b located at two sides of the minor axis direction of the first magnetic steel 30, wherein the major axis side x and the minor axis side y are relatively long and short, and x and y are distinguished in the figure, which cannot be understood as the limitation of the protection range.

More preferably, the second clamping plate 20 has two major axis sides x and two minor axis sides y; a first magnetic conduction part 21 is arranged on the long axis side x of the second clamping plate, and the first magnetic conduction part 21 is connected with one side, far away from the first clamping plate 10, of the two second magnetic steels 40a positioned on the two sides of the long axis direction of the first magnetic steel 30; the minor axis side y of the second clamping plate 20 is provided with a second magnetic conductive portion 22, the second magnetic conductive portion 22 extends inward, and the second magnetic conductive portion 22 is connected to one side of the two second magnetic steels 40b located at two sides of the first magnetic steel 30 in the minor axis direction, which is far away from the first clamping plate 10.

Preferably, the number of the reinforcing magnetic steels 70 is two, and the two reinforcing magnetic steels 70 are respectively located on the side of the long axis side x of the second clamping plate 20 away from the first clamping plate 10, so as to optimize the magnetic field of the magnetic circuit system 100.

Preferably, the first magnetic steel 30 is fixed to the first clamping plate 10, the first magnetic steel 30 includes a first through hole 31, and the first through hole 31 is formed in a central region of the first magnetic steel 30 in a penetrating manner. The central region of first magnet steel 30 indicates the region that is close to first magnet steel 30 geometric centre, and utmost point core 50 is fixed in first magnet steel 30 deviates from first splint 10 one side, just coil 60 with first through-hole 31 interval sets up, forms the electromagnetic field after coil 60 circular telegram for the magnetic field performance (BL) of speaker can promote.

Preferably, the second magnetic steel 40 is fixed to the first clamping plate 10, and the second magnetic steel 40 and the first magnetic steel 30 are arranged at an interval to form a magnetic gap 43. The second magnetic steel 40 is fixed between the first clamping plate 10 and the second clamping plate 20.

Preferably, referring to fig. 4, the pole core 50 includes a main body 51 and an extension 52, the main body 51 is connected to the first magnetic steel 30, the extension 52 extends from the main body 51 to the inside of the through hole 90, the coil 60 is located in the through hole 90, and the coil 60 is wound on the extension 52.

Specifically, referring to fig. 4, the main body 51 includes an upper surface 511 and a lower surface 512, and the lower surface 512 is fixed to an end of the first magnetic steel 30 facing away from the first clamping plate 10. The upper surface 511 and the lower surface 512 are disposed opposite to each other, the extending portion 52 extends from the central area of the lower surface 512 to the direction close to the first clamping plate 10, and the lower surface 512 of the main body portion 51 covers one end of the first magnetic steel 30 facing away from the first clamping plate 10.

Preferably, the first through hole 31 includes a first inner side 311, the first inner side 311 is spaced from and opposite to the coil 60, the second through hole 11 includes a second inner side 111, the second inner side 111 is spaced from and opposite to the coil 60, and the first inner side 311 is coplanar with the second inner side 111.

Preferably, the reinforcing magnetic steel 70 is fixed to an end of the second clamping plate 20 facing away from the first clamping plate 10 to optimize the magnetic field of the magnetic circuit system 100.

The present embodiment further provides a speaker, which includes the magnetic circuit system 100, and referring to fig. 1 to 4, the speaker further includes at least a voice coil 80, and the voice coil 80 is suspended in the magnetic gap 43 of the magnetic circuit system 100.

Therefore, through the arrangement of the through hole 90 in the central area of the first magnetic steel 30 and the first overtime battery 10, the extension part 52 of the pole core 50 wound with the coil 60 is suspended in the through hole 90, the coil 60 forms an electromagnetic field after being electrified, and the magnetic field performance (BL) and the whole acoustic performance of the loudspeaker are improved by utilizing the permanent magnetic field of the first magnetic steel 30 and the electromagnetic field of the coil 60.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims (9)

1. A magnetic circuit system of a loudspeaker comprises a first clamping plate, first magnetic steel arranged on the first clamping plate, and a pole core arranged on one side of the first magnetic steel, which is far away from the first clamping plate; the magnetic circuit system is characterized by further comprising a through hole penetrating through the first magnetic steel and the first clamping plate; the pole core comprises a main body part connected with the first magnetic steel and an extension part extending from the main body part to the inside of the through hole; the magnetic circuit system also comprises a coil which is positioned in the through hole and wound on the extension part.

2. The magnetic circuit system of claim 1, further comprising a second magnetic steel mounted on the first clamping plate and spaced apart from the first magnetic steel to form a magnetic gap.

3. The magnetic circuit system of claim 1, wherein the through holes include a first through hole penetrating a central region of the first magnetic steel and a second through hole penetrating a central region of the first clamping plate and communicating with the first through hole, and the extension portion of the pole piece extends into the first through hole and the second through hole.

4. The magnetic circuit system of claim 3, wherein the first through hole includes a first inner side spaced from and facing the coil, and the second through hole includes a second inner side spaced from and facing the coil, the first inner side and the second inner side being coplanar.

5. The magnetic circuit system of claim 1, wherein the main body includes a lower surface fixed to an end of the first magnetic steel facing away from the first clamp plate and an upper surface opposite to the lower surface, and the extension portion extends from a central region of the lower surface toward the first clamp plate.

6. The magnetic circuit system of claim 2, wherein the first magnetic steel is rectangular and includes two major axis sides and two minor axis sides, the number of the second magnetic steels is four, and the four second magnetic steels include two second magnetic steels located on two sides of the major axis direction of the first magnetic steel and two second magnetic steels located on two sides of the minor axis direction of the first magnetic steel.

7. The magnetic circuit system of a speaker according to claim 6, further comprising a second clamp plate having two major axis sides and two minor axis sides; a first magnetic conduction part connected with one side of the second magnetic steel, which is far away from the first clamping plate, is arranged on the long shaft side of the second clamping plate; and a second magnetic conduction part which extends inwards and is connected with one side of the second magnetic steel, which is far away from the first clamping plate, is arranged on the short shaft side of the second clamping plate.

8. The magnetic circuit system of claim 7, further comprising two reinforcing magnetic steels respectively located at the sides of the long axis of the second clamping plate far from the first clamping plate.

9. A loudspeaker comprising a magnetic circuit system of a loudspeaker according to any of claims 1-8.

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