CN101977342B - Loudspeaker - Google Patents

Abstract

The invention provides a loudspeaker, in which the magnetic circuit system includes a magnetic bowl and a first magnet and a second magnet fixed side by side at the bottom of the magnetic bowl, and the two magnets are oblique magnetized magnets. Because the two magnets of the present invention are oblique magnetized magnets, the magnetic force lines perpendicular to the voice coil can be obtained, and the magnetic pole cores that play the role of magnetic conduction in the prior art can be omitted, so that the height of the magnetic circuit system of the present invention can be reduced. As the size of the product is reduced, the size of the product is also reduced, thereby promoting the development of the product in the direction of miniaturization and thinning. In addition, production costs can be reduced.

Description

speaker

【Technical field】

The invention relates to a loudspeaker, in particular to a magnetic circuit system of the loudspeaker. the

【Background technique】

With the rapid development of mobile communication technology in recent years, consumers are increasingly using mobile communication devices with voice functions, such as portable phones, handheld game consoles, laptop computers, laptop computers, multimedia players and through Other devices that communicate over public or private communication networks. People not only care about its voice quality, but also require it to be small, light, and easy to carry. As a voice transmission device, the size design of the speaker will directly affect the shape and size of the communication equipment. the

At present, the loudspeaker includes a magnetic circuit system and a vibration system. The magnetic circuit system usually includes a magnetic bowl with a bottom wall, a magnetic steel accommodated in the magnetic bowl, and a magnetic pole core covered on the magnetic steel. Magnetic gap, the vibration system is provided with a voice coil suspended in the magnetic gap. Wherein, the magnetic steel is provided with two magnetic poles with opposite magnetic polarities, and the connecting line of the two magnetic poles is perpendicular to the bottom wall of the magnetic bowl, that is, the magnetization direction of the magnetic steel is perpendicular to the bottom of the magnetic bowl. The magnetic pole core plays the role of magnetic conduction, and is used to guide the magnetic force line in the magnetic gap perpendicular to the voice coil. However, the added magnetic pole core has a certain thickness, which leads to an increase in the height of the magnetic circuit system, thereby hindering the development of the speaker in the direction of miniaturization and thinning. the

Therefore, it is necessary to provide a new loudspeaker to make up for the above defects. the

【Content of invention】

The technical problem to be solved by the present invention is to provide a loudspeaker that can reduce the height and facilitate the development of product miniaturization. the

According to the technical problems to be solved above, a loudspeaker is designed, which includes a magnetic circuit system, the magnetic circuit system includes a magnetic bowl and a first magnet and a second magnet fixed at the bottom of the magnetic bowl in parallel. A gap is formed between the first magnet and the second magnet, and the bottom end of the first magnet near the bottom of the magnetic bowl is provided with a first magnetic pole, and the top far away from the bottom of the magnetic bowl is provided with a second magnetic pole opposite to the first magnetic pole, so The bottom end of the second magnet near the bottom of the magnetic bowl is provided with the third magnetic pole with the same pole as the first magnetic pole, and the top far away from the bottom of the magnetic bowl is provided with the fourth magnetic pole with the same pole with the second magnetic pole. The position and the position of the third magnetic pole are symmetrical relative to the gap, the position of the second magnetic pole and the position of the fourth magnetic pole are symmetrical relative to the gap, and the distance between the first magnetic pole and the third magnetic pole is smaller than that between the second magnetic pole and the fourth magnetic pole the distance between. the

As an improvement of the present invention, the first magnet and the second magnet are cuboids with the same shape, and the gap is formed between the long sides of the first magnet and the long sides of the second magnet that are parallel to each other. the

As an improvement of the present invention, the first magnetic pole and the third magnetic pole are respectively located at the bottom ends of the first magnet and the second magnet near the side ends of the gap, and the second magnetic pole and the fourth magnetic pole are respectively located at the first The top ends of the magnet and the second magnet are away from the side ends of the gap. the

As an improvement of the present invention, the angle between the direction from the first magnetic pole to the second magnetic pole and the horizontal direction at the bottom of the parallel magnetic bowl is 45°. the

As an improvement of the present invention, the angle between the directions of the first magnetic pole and the second magnetic pole and the horizontal direction of the bottom of the parallel magnetic bowl is 30°. the

The present invention has the following advantages: since the two magnets of the present invention are obliquely magnetized magnets, the magnetic force lines perpendicular to the voice coil can be obtained, and the magnetic pole cores that play a role in magnetic conduction existing in the prior art can be omitted, thus the present invention The height of the magnetic circuit system can be reduced, and the size of the product will also be reduced accordingly, thereby promoting the development of the product in the direction of miniaturization and thinning. In addition, production costs can be reduced. the

【Description of drawings】

Fig. 1 is a structural schematic diagram of the loudspeaker of the present invention. the

Fig. 2 is a schematic diagram of the magnetic circuit system of the loudspeaker of the present invention. the

【Detailed ways】

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. the

As shown in FIG. 1 , a speaker 1 according to an embodiment of the present invention includes a frame 10 , a magnetic circuit system accommodated in the frame 10 , a vibration system, and an upper cover 19 connected to the frame 10 . The magnetic circuit system includes a magnetic bowl 11 , a first magnet 12 and a second magnet 13 fixed parallel to the bottom 110 of the magnetic bowl, and the vibration system includes a voice coil 14 and a diaphragm 15 connected to the voice coil 14 . Wherein, a magnetic gap 102 is formed between the first magnet 12, the second magnet 13 and the side wall 111 of the magnetic bowl 11, the voice coil 14 is suspended in the magnetic gap 102, and the edge of the diaphragm 15 is connected to the upper cover 19. the

The shape of the first magnet 12 and the second magnet 13 of the present invention is the same as a cuboid, and the long sides of the two magnets are parallel to each other, and there is a gap 101 between the two long sides. As shown in FIG. 2 , the bottom end 120 of the first magnet 12 near the bottom 110 of the magnetic bowl is provided with a first magnetic pole, and the top 121 away from the bottom of the magnetic bowl is provided with a second magnetic pole opposite to the first magnetic pole. The bottom 130 of the second magnet 13 near the bottom 110 of the magnetic bowl is provided with the third magnetic pole of the same pole with the first magnetic pole, and the top 131 far away from the bottom of the magnetic bowl is provided with the fourth magnetic pole of the same pole with the second magnetic pole. In an example, the first magnetic pole of the first magnet 12 is N pole, and the second magnetic pole is S pole; the third magnetic pole of the second magnet 13 is N pole, and the fourth magnetic pole is S pole. Of course, the N poles and S poles of the above magnets can also be arranged in opposite directions. the

The position of the N pole of the first magnet 12 and the position of the N pole of the second magnet 13 are symmetrical with respect to the gap 101, the position of the S pole of the first magnet 12 and the position of the S pole of the second magnet 13 are symmetrical with respect to the first magnetic gap 101, and the first magnet The distance between the first magnetic pole N pole of 12 and the third magnetic pole N pole of the second magnet 13 is smaller than the distance between the second magnetic pole S pole of the first magnet 12 and the fourth magnetic pole S pole of the first magnet 12, that is, , the directions of the lines of force in the first magnet and the second magnet are oblique relative to the bottom of the magnetic bowl. And, the N pole of the first magnet is positioned at the side end of the bottom end 120 of the first magnet 12 near the gap 101, the S pole of the first magnet is positioned at the side end of the top 121 of the first magnet 12 away from the gap 101; the N pole of the second magnet 13 Located at the side end of the bottom end 130 of the second magnet 13 close to the gap 101 , the S pole of the second magnet is located at the side end of the top end 131 of the second magnet 13 away from the gap 101 . the

The magnetic poles of the first magnet and the second magnet are designed in such a way that when the first magnet and the second magnet are magnetized, the magnetization direction is not perpendicular to the surface of the magnet, but oblique magnetization, so that the magnet N pole to S The magnetic field direction of the pole forms an acute angle with respect to the X-axis in the horizontal direction. The X-axis in the horizontal direction is the plane parallel to the bottom of the magnetic bowl. The oblique magnetization can make the magnetic force lines passing through the magnetic gap perpendicular to the voice coil without having to set up a magnetic conduction Pole core used. Therefore, the height of the magnetic circuit system of the present invention can be reduced, and the size of the product can also be reduced accordingly, thereby promoting the development of the product toward the direction of miniaturization and thinning. In addition, production costs can be reduced. the

In other embodiments of the invention, the angle between the direction from the first magnetic pole to the second magnetic pole of the first magnet and the second magnet and the X-axis in the horizontal direction may be 45°, that is, the magnetization direction and the horizontal direction of magnetizing the magnets 45°, of course the magnetization direction can also be 30° or other angles. the

What has been described above is only the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present invention, but these all belong to the present invention. scope of protection. the

Claims (5)

1. loud speaker, it comprises magnetic circuit system, described magnetic circuit system comprises the magnetic bowl and is fixed in first magnet and second magnet of magnetic bowl bottom side by side, form the gap between described first magnet and second magnet, described first magnet is provided with first magnetic pole near the bottom of magnetic bowl bottom, be provided with second magnetic pole opposite with first magnetic pole with the top away from the magnetic bowl bottom, the bottom of the close magnetic bowl bottom of described second magnet is provided with the 3rd magnetic pole with the first magnetic pole homopolarity, be provided with the 4th magnetic pole with the second magnetic pole homopolarity with top away from the magnetic bowl bottom, it is characterized in that: the position of the position of described first magnetic pole and the 3rd magnetic pole is with respect to described gap symmetry, relative described gap with the position of the 4th magnetic pole, the position of second magnetic pole symmetry, distance between first magnetic pole and the 3rd magnetic pole is less than the distance between second magnetic pole and the 4th magnetic pole, and first magnet magnetic line of force direction interior and that second magnet is interior is skewed with respect to the magnetic bowl bottom.

2. loud speaker according to claim 1, it is characterized in that: described first magnet is the identical cuboid of shape with second magnet, described gap is by forming between the long limit of first magnet that is parallel to each other and the long limit of second magnet.

3. loud speaker according to claim 1, it is characterized in that: described first magnetic pole and the 3rd magnetic pole lay respectively at the bottom of first magnet and second magnet near the side in described gap, and described second magnetic pole and the 4th magnetic pole lay respectively at the top of first magnet and second magnet away from the side in described gap.

4. loud speaker according to claim 1, it is characterized in that: described first magnetic pole is 45 ° to the direction of second magnetic pole with the angle of the horizontal direction of parallel magnetic bowl bottom.

5. loud speaker according to claim 1, it is characterized in that: the direction of described first magnetic pole and second magnetic pole is 30 ° with the angle of the horizontal direction of parallel magnetic bowl bottom.