CN201893920U - Electromagnetic loudspeaker - Google Patents

Abstract

The utility model provides an electromagnetic loudspeaker, which comprises inner magnetic steel and a magnetic frame. The magnetic frame includes a bottom plate and two baffle plates; the two baffle plates respectively extend upwards from a first lateral edge and a second lateral edge of the bottom plate; the first lateral edge and the second lateral edge are opposite to each other; and the inner magnetic steel is positioned in the middle of the bottom plate. The electromagnetic loudspeaker further comprises two pieces of outer magnetic steel arranged at a third lateral edge and a fourth lateral edge of the bottom plate respectively, wherein the third lateral edge and the fourth lateral edge are opposite to each other and adjacent to the first lateral edge and the second lateral edge. The electromagnetic loudspeaker has the advantage of better magnetic circuit performance.

Description

electromagnetic speaker

technical field

The utility model relates to a loudspeaker, in particular to an electromagnetic loudspeaker.

Background technique

Loudspeakers are widely used in many electronic products in life and industry, especially the application of electromagnetic loudspeakers is more common.

Please refer to Fig. 1 to Fig. 3, wherein Fig. 1 is a kind of schematic diagram of the disassembled state of the partial structure of the electromagnetic loudspeaker related to the utility model, Fig. 2 is the schematic diagram of the assembled state of the partial structure of the electromagnetic loudspeaker shown in Fig. 1, Fig. 3 is a schematic diagram along the diagram Schematic cross-sectional view of line III-III in 2. The electromagnetic speaker 1 includes an upper cover 10 , a diaphragm 11 , a pole core 12 , a magnetic steel 13 , a voice coil 14 , a magnetic frame 15 , a frame 16 and a lower cover 17 . Wherein, the magnetic frame 15 includes a substantially rectangular bottom plate 151 and a baffle plate 152 extending upward from around the bottom plate 151 . The bottom plate 151 and the blocking plate 152 form a receiving space (not shown). The magnetic steel 13 is arranged in the middle of the receiving space, and the pole core 12 is arranged on the upper surface thereof. The voice coil 14 surrounds the magnetic steel 13 , and the diaphragm 11 covers the voice coil 14 . The frame 16 accommodates the magnetic frame 15 and fastens with the upper cover 10 and the lower cover 17 to form the electromagnetic speaker 1 . In the electromagnetic speaker 1, notches 153 are provided at four corners of the baffle 152, and the notches 153 function as damping holes to improve product performance.

One problem with the above electromagnetic speaker 1 is that the magnetic circuit of the electromagnetic speaker 1 is a single magnetic circuit structure, and its magnetic circuit performance is relatively low.

Utility model content

Aiming at the problem that the magnetic circuit performance of the single magnetic circuit structure is poor in the existing electromagnetic loudspeaker, the utility model provides an electromagnetic loudspeaker with a double magnetic circuit structure with better magnetic circuit performance.

An electromagnetic loudspeaker, comprising an inner magnetic steel and a magnetic frame, the magnetic frame includes a bottom plate and two baffles, the two baffles respectively extend upward from the opposite first and second side edges of the bottom plate, the inner magnetic steel is located At the middle position of the bottom plate, the electromagnetic speaker further includes two outer magnetic steels, the two outer magnetic steels are respectively arranged on the third and fourth side edges of the bottom plate that are opposite to each other and adjacent to the first and second side edges .

As a further improvement of the electromagnetic speaker, the bottom plate is a rectangular flat plate structure.

As a further improvement of the electromagnetic speaker, the two baffles are located in the middle of the first and second side edges of the bottom plate, and the lengths of the two baffles are shorter than the lengths of the first and second side edges.

As a further improvement of the electromagnetic loudspeaker, the two outer magnetic steels abut against ends of the two baffles respectively.

As a further improvement of the electromagnetic speaker, the lengths of the two outer magnetic steels are consistent with the lengths of the third and fourth side edges.

As a further improvement of the electromagnetic speaker, the lower surfaces of the two outer magnetic steels are bonded to the bottom plate.

As a further improvement of the electromagnetic speaker, the electromagnetic speaker further includes two splints, and the two splints are respectively arranged on the upper surfaces of the two outer magnetic steels.

As a further improvement of the electromagnetic speaker, notches are respectively arranged on the two baffles.

As a further improvement of the electromagnetic speaker, the notch is located on the outer edges of the two baffles away from the bottom surface.

As a further improvement of the electromagnetic speaker, the notch is located at the end of the outer edge.

In the electromagnetic loudspeaker, the inner magnetic steel and the two outer magnetic steels form a double magnetic circuit structure, which improves the performance of the magnetic circuit. In addition, the gaps on the two baffles can function as damping holes, further improving product performance.

Description of drawings

Fig. 1 is a schematic diagram of an exploded state of a partial structure of an electromagnetic loudspeaker related to the present invention.

FIG. 2 is a schematic diagram of a partial structural assembly state of the electromagnetic speaker shown in FIG. 1 .

FIG. 3 is a schematic cross-sectional view along line III-III in FIG. 2 .

Fig. 4 is a schematic diagram of a partial structural decomposition state of a preferred embodiment of the electromagnetic loudspeaker of the present invention.

FIG. 5 is a schematic diagram of a partial structural assembly state of the electromagnetic speaker shown in FIG. 4 .

FIG. 6 is a schematic cross-sectional view along line VI-VI in FIG. 5 .

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing.

Please refer to Fig. 4 to Fig. 6, wherein Fig. 4 is a schematic diagram of a partial structural disassembly state of a preferred embodiment of the electromagnetic loudspeaker of the present invention, Fig. 5 is a schematic diagram of a partial structural assembly state of the electromagnetic loudspeaker shown in Fig. 4, Fig. 6 is a diagram along the Schematic cross-sectional view of line VI-VI in 5. The electromagnetic speaker 3 includes an upper cover 30 , a diaphragm 31 , a pole core 32 , an inner magnet 33 , a voice coil 34 , an outer magnet 35 , a splint 36 , a magnetic frame 37 , a frame 38 and a lower cover 39 .

The magnetic frame 37 includes a bottom plate 370 and two baffles 372 . The bottom plate 370 is a substantially rectangular plate structure. The two baffles 372 extend upward from opposite first and second side edges of the bottom plate 370 . The two baffles 372 are also substantially rectangular plate structures, and a notch 373 is formed on an outer edge away from the bottom plate 370 . In this embodiment, the notch 373 is specifically formed at the end of the outer edge. Certainly, those skilled in the art can fully imagine disposing the notch 373 at any suitable position of the two baffles 372 . In this embodiment, the two baffles 372 are preferably located in the middle of the first and second side edges of the bottom plate 370 , and have a length shorter than that of the first and second side edges.

The basin frame 38 is a frame body made of plastic, with openings at its upper and lower ends, and a stepped structure (not shown). The baffle plate 372 of the magnetic frame 37 elastically contacts the inner side of the frame 38 , so that the magnetic frame 37 cooperates with the frame 38 to form a receiving frame, and the bottom plate 370 can play a supporting role.

The inner magnetic steel 33 is disposed in the middle of the bottom plate 370 and has a rectangular structure. The inner magnetic steel 33 is usually a permanent magnet made of a variety of higher hardness metals, such as iron, aluminum, nickel and cobalt, or copper, niobium and tantalum. Road performance is also different.

The pole core 32 is arranged on the upper surface of the inner magnetic steel 33, which mainly plays a role of magnetic conduction. That is to say, the inner magnetic steel 33 is sandwiched between the bottom plate 370 and the pole core 32 .

The voice coil 34 is arranged around the inner magnetic steel 33 , and its main function is to generate a corresponding magnetic field after electrification. The voice coil 34 may be a multi-turn coil structure wound by a metal wire, for example, a copper wire.

There are two outer magnets 35 , and the two outer magnets 35 are respectively located on opposite sides of the inner magnet 33 and are located on the periphery of the voice coil 34 . The outer magnetic steel 35 is substantially elongated and disposed on the third and fourth side edges of the bottom plate 370 that are opposite to each other and adjacent to the first and second side edges. In this embodiment, the lengths of the two outer magnets 35 are consistent with the lengths of the third and fourth side edges of the bottom plate 370 , and abut against ends of the two baffles 372 respectively. The lower surfaces of the two outer magnets 35 are bonded to the bottom plate 370 , and the upper surfaces of the two outer magnets 35 are stacked with a splint 36 .

In the electromagnetic speaker 3, the inner magnetic steel 33 and the two outer magnetic steels 35 form a double magnetic circuit structure, which improves the performance of the magnetic circuit. In addition, the notches 373 on the two baffles 372 can function as damping holes, which further improves the performance of the product.

The above are only preferred implementation examples of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. An electromagnetic loudspeaker, comprising an inner magnetic steel and a magnetic frame, characterized in that: the magnetic frame includes a base plate and two baffle plates, and the two baffle plates extend upwards from the opposite first and second side edges of the base plate respectively , the inner magnetic steel is located in the middle of the bottom plate, the electromagnetic speaker further includes two outer magnetic steels, and the two outer magnetic steels are respectively arranged on the third third side of the bottom plate opposite to and adjacent to the first and second side edges. and on the fourth side edge. 2. The electromagnetic loudspeaker according to claim 1, wherein the bottom plate is a rectangular plate structure. 3. The electromagnetic speaker according to claim 1, characterized in that: the two baffles are located in the middle of the first and second side edges of the bottom plate, and the lengths of the two baffles are shorter than the first and second The length of the side edge. 4 . The electromagnetic speaker according to claim 3 , wherein the two outer magnets abut against ends of the two baffles respectively. 5. The electromagnetic speaker according to claim 4, wherein the lengths of the two outer magnets are consistent with the lengths of the third and fourth side edges. 6. The electromagnetic speaker according to claim 1, characterized in that: the lower surfaces of the two outer magnets are bonded to the bottom plate. 7. The electromagnetic speaker according to claim 1, characterized in that: the electromagnetic speaker further comprises two splints, and the two splints are respectively arranged on the upper surfaces of the two outer magnets. 8. The electromagnetic speaker according to claim 1, characterized in that: the two baffles are respectively provided with notches. 9. The electromagnetic speaker according to claim 8, wherein the notch is located on the outer edge of the two baffles away from the bottom surface. 10. The electromagnetic speaker according to claim 9, wherein the notch is located at an end of the outer edge.

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