CN107995573B

CN107995573B - Loudspeaker

Info

Publication number: CN107995573B
Application number: CN201711446193.3A
Authority: CN
Inventors: 鲁成华
Original assignee: Weifang Geldanna Electronic Technology Co ltd
Current assignee: Weifang Geldanna Electronic Technology Co ltd
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2024-03-19
Anticipated expiration: 2037-12-27
Also published as: CN107995573A

Abstract

The invention discloses a loudspeaker, which comprises a magnetic circuit system and a vibration system, wherein a magnetic gap is formed in the magnetic circuit system, and the width range of the magnetic gap is 0.5-0.8cm; the magnetic circuit system comprises a magnet, wherein the magnet is a neodymium-iron-boron magnet. The loudspeaker product provided by the technical scheme of the invention is lighter and thinner.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of acoustic-electric transduction, in particular to a loudspeaker.

Background

A speaker is an indispensable component in electroacoustic products as an energy converter for converting an electric signal into an acoustic signal. With the increasing update of technology, the design of electronic products tends to be more refined, miniaturized and intelligent, and speaker units, which are important parts of electronic products, are continually evolving in a thinner and lighter direction.

Currently, existing woofers generally consist of a vibration system, a magnetic circuit system, and a support system. The vibration system comprises a vibrating diaphragm, a folding ring and a centering support piece voice coil, the support system comprises a basin frame and a terminal, and the magnetic circuit system comprises a magnet, a washer and U-shaped iron. When the product vibration space is designed, the vibration space of the vibrating diaphragm, the vibration space of the centering support piece and the vibration space of the voice coil are required to be considered simultaneously, and the magnetic circuit system usually uses ferrite magnets, so that the volume of the magnetic circuit system is large.

Therefore, the existing woofer products are generally thicker, and the thickness of the whole speaker is difficult to reduce, so that the woofer products have certain difficulty in application in portable sound equipment, and particularly in sound equipment adopting ultrathin design, the woofer products cannot be basically used.

Disclosure of Invention

It is an object of the invention to provide a new solution for loudspeakers.

According to a first aspect of the present invention, there is provided a speaker including a magnetic circuit system in which a magnetic gap is formed, and a vibration system, the magnetic gap having a width in the range of 0.5 to 0.8cm; the magnetic circuit system comprises a magnet, wherein the magnet is a neodymium-iron-boron magnet.

Optionally, the vibration system comprises a voice coil and a vibrating diaphragm, wherein two leads are led out from the voice coil, and the two leads are distributed in a central symmetry manner relative to the center of the voice coil.

Optionally, the lead is fixed on the diaphragm.

Optionally, the vibrating diaphragm includes a ring portion, an arc portion and a plane portion, the ring portion is located at a peripheral edge of the vibrating diaphragm, the plane portion is located at an inner side of the ring portion, an outer edge of the plane portion is connected with an inner edge of the ring portion, the arc portion is located at an inner side of the plane portion, and an inner edge of the arc portion is connected with the voice coil.

Optionally, the voice coil upper cover is provided with a dust cap.

Optionally, a vent hole is arranged in the magnetic circuit system, and the vent hole is configured to communicate the vibration system with an external space at the bottom of the magnetic circuit system.

Optionally, the magnetic circuit system includes washer, magnet and U iron that sets gradually, be provided with the air vent of mutual intercommunication on washer, magnet and the U iron.

Optionally, the diameter of the vent hole at the U-iron is larger than the diameters of the vent holes at the washer and the magnet.

Optionally, an air passage is provided at the bottom of the U-iron, and the air passage communicates the air hole with the periphery of the side wall of the speaker.

Optionally, the width of the magnetic gap ranges from 0.6 cm to 0.7cm.

According to one embodiment of the present disclosure, a speaker product is provided that is lighter and thinner.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is an exploded view of a speaker according to an embodiment of the present invention;

fig. 2 is a front isometric view of a speaker provided by an embodiment of the invention;

FIG. 3 is a rear isometric view of a speaker provided by an embodiment of the invention;

fig. 4 is a cross-sectional view of a speaker provided by an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a top view of a diaphragm with a voice coil attached thereto according to an embodiment of the present invention;

fig. 7 is a schematic side view of a diaphragm with a voice coil and leads attached thereto according to an embodiment of the present invention.

Wherein: 1. magnetic gap 2, magnet 3, voice coil, 4, lead wire, 5, vibrating diaphragm 51, turn-ring portion 52, plane portion 53, arc portion 6, dust cap 7, vent hole 8, washer, 9, U iron, 10, air passage.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

The invention provides a loudspeaker, as shown in figures 1-6, comprising a magnetic circuit system and a vibration system, wherein a magnetic gap is formed in the magnetic circuit system, the width range of the magnetic gap 1 is 0.5-0.8cm, the magnetic circuit system comprises a magnet 2, and the magnet 2 is a neodymium-iron-boron magnet.

The vibration system of the loudspeaker provided by the invention is not provided with the centering support piece, so that the vibration space required by the centering support piece is saved when the vibration space of the product is designed, and the loudspeaker can be designed to be lighter and thinner. The increase of the width of the magnetic gap 1 avoids the problems of polarization and coil rubbing possibly caused by the fact that no centering sheet is available, and avoids the collision between the coil and the magnetic circuit system. Meanwhile, the magnet 2 adopts a neodymium iron boron magnet, so that the magnetic field intensity in the magnetic gap 1 is further enhanced, the magnetic force of the voice coil in the magnetic gap 1 is larger, the voice coil vibration is more stable, and the problems of polarization and rubbing of the voice coil are further avoided. Moreover, the magnet 2 adopts the neodymium-iron-boron magnet, because the magnetic field intensity of the neodymium-iron-boron magnet is larger than that of the ferrite magnet, the thickness of the magnet 2 can be reduced under the condition that the same magnetic field intensity is required, so that the loudspeaker is lighter and thinner, lighter in weight and more suitable for a portable loudspeaker system.

Preferably, the width of the magnetic gap 1 is in the range of 0.6-0.7cm. When the width of the magnetic gap is in the range, the neodymium iron boron magnet can drive the vibration system to vibrate more effectively, and the voice coil is prevented from colliding with the magnetic circuit system.

Specifically, as shown in fig. 5-6, the vibration system comprises a voice coil 3 and a vibrating diaphragm 5, wherein two leads 4 are led out of the voice coil 3, and the two leads 4 are distributed in a central symmetry mode relative to the center of the voice coil 3. The lead 4 is led out from the voice coil 3 in a central symmetry mode, so that the problem of polarization caused by uneven quality of the voice coil 3 due to the lead 4 can be avoided, and the stable performance of the loudspeaker is ensured. Alternatively, the lead 4 may be led out in other manners, which are not limited in the present invention, and all the modifications of these led out manners fall within the protection scope of the present invention.

Further preferably, the lead 4 is fixed to the diaphragm 5. After the lead 4 is led out from the voice coil 3, the lead 4 is bonded on one side of the diaphragm 5, to which the voice coil 3 is connected, and then the ends of the lead 4 are respectively connected to preset terminals, and the terminals and the center of the voice coil 3 are also in center symmetry. Optionally, the lead 4 is fixed on the diaphragm 5 by welding, which is not limited by the invention, and all technical schemes capable of achieving the same technical effect belong to the protection scope of the invention. The lead 4 is fixed on the vibrating diaphragm 5, so that the lead 4 occupies extra vibrating space, the fixing strength of the voice coil 3 and the lead 4 can be ensured, and the loose of the enameled wire fixedly wound on the voice coil due to the fact that the lead vibrates for many times is avoided.

Alternatively, as shown in fig. 4 and 5, the diaphragm 5 includes a folded ring portion 51, a flat portion 52, and an arc portion 53. The plane part is positioned at the inner side of the ring folding part, the outer edge of the plane part is connected with the inner edge of the ring folding part, the arc part is positioned at the inner side of the plane part, and the inner edge of the arc part is connected with the voice coil. The ring folding part plays a role in hanging and guiding when the product works, so that the vibration system can normally vibrate and sound. The ring-folding portion 51 may be formed of a bending ring, and the flat portion 52 and the arc portion 53 may be formed of a cone. The planar portion 52 is connected with the ring-folding portion 51, the surface of the arc portion 53 is a curved surface, as shown in fig. 5, and the arc portion 53 is gradually bent and turned outwards along the direction extending toward the center of the diaphragm. By providing the arc-shaped portion, the ductility of the whole vibrating diaphragm 5 can be increased, and the product is ensured to have a sufficiently wide frequency response. The high-frequency sound generated by vibrating the vibrating diaphragm has better tone quality effect. The proportion of the folded ring part, the arc part and the plane part in the whole vibrating diaphragm can be set as required by a person skilled in the art, and other combination modes of the folded ring part, the arc part and the plane part can be selected, so that the technical scheme capable of achieving the same technical effect belongs to the protection scope of the invention.

Preferably, the voice coil upper cover is provided with a dust cap 6, as shown in fig. 3 and 4. The dust cap 6 may be fixedly connected with the voice coil 3 or may be connected with the diaphragm 5. For example, the edge of the dust cap 6 is attached to the flat portion 52 of the diaphragm, and the inner side surface of the dust cap 6 is attached to the top surface of the voice coil 3. The dustproof cap 6 plays a role in sealing the opening at the voice coil 3, so that dust and foreign matters are prevented from falling into the loudspeaker, and the performance and the service life of the loudspeaker are influenced. On the other hand, providing the dust cap 6 can improve the acoustic effect of the speaker.

For the magnetic circuit system, in an alternative embodiment, a vent hole 7 is arranged in the magnetic circuit system, and the vent hole 7 communicates the vibration system with the external space at the bottom of the magnetic circuit system. The vibrating system comprises a vibrating diaphragm 5, the vibrating diaphragm 5 vibrates when a product works to enable the vibrating system to generate heat, after the vibrating diaphragm is communicated with a peripheral space at the bottom of the magnetic circuit system through a vent hole 7, the vibrating system and a cavity in a surrounding area of the magnetic circuit system can exchange gas with the periphery at the bottom of the magnetic circuit system, so that the temperature in the cavity is reduced, and the acoustic performance of the product is guaranteed and stabilized.

As shown in fig. 1, the magnetic circuit system comprises a washer 8, a magnet 2 and a U iron 9, wherein the washer 8 and the magnet 2 are arranged in the U iron 9, the washer 8 is positioned on the magnet 2, and the U iron 9 is arranged below the magnet 2. The gap between the washer 8 and the magnet 2 and the U-iron 9 forms the magnetic gap 1. The center parts of the washer 8, the magnet 2 and the U-shaped iron 9 are provided with communicated vent holes 7, and the vent holes 7 are communicated with the periphery of the bottom of the vibration system and the periphery of the bottom of the magnetic circuit system.

The diameter of the vent hole 7 at the U-shaped iron 9 is larger than that of the vent hole 7 at the washer 8 and the magnet 2, so that the air flow is more stable when flowing, and the larger vent hole at the U-shaped iron 9 plays a role in stabilizing flow, so that a better heat dissipation effect is achieved. Preferably, the diameters of the air vent holes 7 at the washer 8 and the magnet 2 are the same, and the air vent holes 7 are cylindrical. Optionally, the diameters of the air holes 7 of the washer 8, the magnet 2 and the U-shaped iron 9 may be set as required, and the air holes 7 may be rectangular or other shapes, which are not limited in the present invention, and the changes of the diameters and the shapes of the air holes are all within the protection scope of the present invention.

Further, as shown in fig. 3-4, an air passage 10 is provided at the bottom of the U-shaped iron 9, and the air passage 10 is formed by extending from the air hole 7 at the U-shaped iron 9 to the periphery of the speaker side wall, and the air passage 10 communicates the air hole 7 with the periphery of the speaker side wall. When the bottom of the loudspeaker is clung to the loudspeaker system box body or is adhered with damping foam, the ventilation duct 10 can be used for communicating the ventilation holes 7 with the periphery of the side wall of the loudspeaker, so that the ventilation holes 7 are prevented from being blocked, the heat dissipation of the loudspeaker is smooth, and the acoustic performance of the product is ensured.

Preferably, the air duct 10 is simultaneously communicated with the magnetic gap 1, so that air flow can be exchanged with the periphery of the side wall of the loudspeaker through the air hole 7 and the magnetic gap 1 at the same time, and a better heat dissipation effect is achieved.

In addition, can also be provided with the magnetic liquid in the magnetic gap 1, voice coil 3 can strengthen the vibration damping to the coil owing to there is the effect of magnetic liquid, simultaneously, the magnetic liquid can also play for voice coil 3 refrigerated effect, further quickens the heat dissipation, improves the acoustic performance of product.

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The loudspeaker is characterized by comprising a magnetic circuit system and a vibration system, wherein a magnetic gap is formed in the magnetic circuit system, and the width range of the magnetic gap is 0.5-0.8cm; the magnetic circuit system comprises a magnet, wherein the magnet is a neodymium-iron-boron magnet;

the magnetic circuit system comprises U-shaped iron, an air passage is arranged at the bottom of the U-shaped iron, the air passage extends from the air hole at the U-shaped iron to the periphery of the side wall of the loudspeaker, and the air passage communicates the air hole with the periphery of the side wall of the loudspeaker;

the air passage communicates with the magnetic gap.

2. The loudspeaker of claim 1, wherein the vibration system comprises a voice coil and a diaphragm, wherein two leads are led out of the voice coil, and the two leads are distributed in a central symmetry manner relative to the center of the voice coil.

3. The loudspeaker of claim 2, wherein the leads are secured to the diaphragm.

4. The loudspeaker of claim 2, wherein the diaphragm includes a ring portion, an arc portion, and a planar portion, the ring portion is located at a peripheral edge of the diaphragm, the planar portion is located at an inner side of the ring portion, an outer edge of the planar portion is connected to an inner edge of the ring portion, the arc portion is located at an inner side of the planar portion, and an inner edge of the arc portion is connected to the voice coil.

5. The loudspeaker of claim 2, wherein the voice coil upper cover is provided with a dust cap.

6. The loudspeaker of claim 1, wherein the magnetic gap has a width in the range of 0.6-0.7cm.

7. The speaker of claim 1, wherein the vent communicates the vibration system with an external space at the bottom of the magnetic circuit system.

8. The loudspeaker according to claim 1 or 7, wherein the magnetic circuit system comprises a washer, a magnet and a U-iron which are sequentially arranged, and vent holes which are communicated with each other are formed in the washer, the magnet and the U-iron.

9. The loudspeaker of claim 8, wherein the diameter of the vent holes at the U-irons is greater than the diameters of the vent holes at the washer and magnets.