WO2017028034A1

WO2017028034A1 - Outer-magnet ultrathin speaker and audio device

Info

Publication number: WO2017028034A1
Application number: PCT/CN2015/087042
Authority: WO
Inventors: 王海舟
Original assignee: 深圳市鲁粤盛科技有限公司
Priority date: 2015-08-14
Filing date: 2015-08-14
Publication date: 2017-02-23
Also published as: CN106489272A

Abstract

An outer-magnet ultrathin speaker and an audio device. The outer-magnet ultrathin speaker comprises a magnetic circuit structure and a radiate vibration structure. The magnetic circuit structure comprises a T-shaped iron (1), magnets (2) sleeved on a vertical part of the T-shaped iron (1) in a stacked manner, and a washer (3). The magnets (2) are in contact with a horizontal part of the T-shaped iron (1). The radiate vibration structure comprises a damper (4) disposed on the washer (3) and a radiate diaphragm (6) disposed relative to the damper (4), and further comprises a voice coil (5). One end of the voice coil (5) is disposed in a center hole of the damper (4), and the other end is fixedly connected to the radiate diaphragm (6). A radiate diaphragm structure is used, a panel is used as a sounding body, a coil provides motive force, and radiate sound waves are propagated in an omnidirectional manner, which makes a sound field wider and facilitates installation of a television, so that users can hear desired sound at different angles. A low-frequency response can be lower than that of a same type of speaker, so that the users can hear fuller low-frequency sound. In addition, the speaker has a thin appearance and a small size, occupies a smaller space, is applicable to wider fields, and has low overall product cost.

Description

External magnetic ultra-thin speaker and audio device

Technical field

The invention relates to the technical field of electrical products, in particular to an external magnetic ultra-thin speaker and an audio device.

Background technique

As the electronic part of the TV is integrated, the space occupied by the TV can be smaller and smaller, the TV products are becoming more and more ultra-thin, and the sound quality requirements of the people are not improved, so the TV speakers require a small size. The thickness is thin, the low frequency response is low, the ultra-wide directivity, and the price are low.

At present, most of the cone-shaped paper cone speakers are used on the market, and the vibration structure has the advantages of simple manufacture and low cost. The disadvantage is that it is easy to generate modal resonance, large distortion, narrow directivity, and the size of the product itself is limited, the vibration space is large, and it cannot be thinned, which greatly limits the thickness of the TV set; Magnetic design, the advantage of this method is that it can be thinner and lighter than ordinary external magnetic speakers. The disadvantage is that the magnet of NdFeB is needed, which is expensive.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art and to provide an external magnetic ultrathin speaker.

The invention is achieved by the above technical solutions:

The invention provides an external magnetic ultra-thin speaker, the external magnetic ultra-thin speaker comprising:

a magnetic circuit structure comprising: a T-shaped iron, a magnet disposed on an upper vertical portion of the T-shaped iron, and a spar, and the magnet is in contact with a horizontal portion of the T-shaped iron, the washer being in contact with a side of the magnet away from the horizontal portion;

The radiation vibration structure includes: an elastic wave disposed on a side of the washer facing away from the magnet, a radiation diaphragm disposed opposite to the elastic wave, and a voice coil, wherein one end of the voice coil is disposed The voice coil in the center hole of the elastic wave is fixedly connected to the radiation diaphragm at the other end.

Preferably, the method further includes a support structure including a bracket, the elastic wave is fixed to the bottom of the bracket, and the radiation diaphragm is fixed on the top of the bracket.

Preferably, the outer side wall of the bracket is connected with a terminal board, and the terminal connected to the voice coil is fixed to the terminal board.

Preferably, a connection between the vertical portion of the T-shaped iron and the horizontal portion is provided with a shoulder structure, and the magnet is fitted on the shoulder.

Preferably, the diameter of the central hole of the washer is smaller than the diameter of the central hole of the magnet, and the diameter of the central hole of the washer and the diameter of the central hole of the magnet are larger than the vertical of the T-shaped iron Part of the diameter.

Preferably, the horizontal portion has a tapered recess coaxial with the vertical portion.

The present invention also provides an audio device comprising the external magnetic ultrathin speaker of any of the above.

The invention has the beneficial effects that the radiation diaphragm structure is adopted, the flat plate is used as the sounding body, the coil is used as the driving force, and the radiated sound wave is omnidirectionally propagated, so that the sound field coverage is wider, and the television is installed, so that people can hear at different angles. More ideal sound;

The low frequency response can be lower than that of similar speakers, allowing people to hear the low frequencies more full;

At the same time, the shape is thin, the volume is small, the space occupation is small, and the applicable field is wider;

Not only the material cost is low, but also the manufacturing process is simple, so that the overall cost of the product is low.

DRAWINGS

1 is a schematic structural view of an external magnetic ultrathin speaker according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a magnetic circuit structure according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 and FIG. 2, FIG. 1 is a schematic structural view of an external magnetic ultrathin speaker provided by the present invention, and FIG. 2 is a schematic structural view of a magnetic circuit structure according to an embodiment of the present invention.

An embodiment of the present invention provides an external magnetic ultrathin speaker, the external magnetic ultrathin speaker comprising:

a magnetic circuit structure comprising: a T-shaped iron 1, a magnet 2 and a washer 3 fitted in an upper vertical portion of the T-shaped iron 1, and the magnet 2 is in contact with a horizontal portion of the T-shaped iron 1 Said Huashi 3 is in contact with one side of the magnet 2 away from the horizontal portion;

The radiation vibration structure includes: an elastic wave 4 disposed on a side of the washer 3 facing away from the magnet 2, a radiation diaphragm 6 disposed opposite to the elastic wave 4, and a voice coil 5, the sound One end of the ring 5 is disposed in the voice coil 5 in the center hole of the elastic wave 4, and the other end is fixedly connected to the radiation diaphragm 6.

In order to facilitate the understanding of the external magnetic ultrathin speaker provided by the embodiment of the present invention, the structure thereof will be described in detail below.

The external magnetic ultra-thin speaker is mainly composed of a magnetic circuit structure, a radiation vibration structure and a support structure.

The magnetic circuit structure is as shown in FIG. 2, which is composed of T-shaped iron 1, magnet 2, and washer 3, wherein the T-shaped iron 1 allows the voice coil 5 to be in the space where the magnet 2 has a fixed magnetic field. In the concentrated magnetic field; the magnet 2 provides a fixed magnetic field, so that the current flowing through the voice coil 5 and the magnetic field of the magnet 2 cut the magnetic line to generate a force; the washer 3 in the space where the magnet 2 has a fixed magnetic field, the voice coil 5 The ability to produce a greater force in a more concentrated magnetic field. In the specific setting, both the washer 3 and the magnet 2 are annular structures having a central hole, and the horizontal portion of the T-shaped iron 1 has a tapered groove coaxial with the vertical portion, and the vertical portion and the horizontal portion of the T-shaped iron 1 A part of the joint is provided with a shoulder structure, and when assembled, the magnet 2 is fitted over the shoulder. The diameter of the center hole of the washer 3 is smaller than the diameter of the center hole of the magnet 2, and the diameter of the center hole of the washer 3 and the diameter of the center hole of the magnet 2 are both larger than the diameter of the vertical portion of the T-iron 1. As can be seen from the reference, the diameter of the outer ring of the washer 3 is smaller than the diameter of the outer ring of the magnet 2. In use, the magnetic coil structure inherent in the magnetic circuit structure cuts the voice coil 5 in the radiation vibration structure to generate a magnetic field cutting force line through the input current, causing the voice coil 5 to vibrate up and down, and the radiation diaphragm 6 vibrates up and down through the voice coil 5 to the air medium. Radiated sound waves.

The radiation vibration structure, together with reference to FIG. 1, is composed of a radiation diaphragm 6, a bomb wave 4 and a voice coil 5, wherein the elastic wave 4 is a ring structure having a center hole, and the voice coil 5 is stuck in the hole of the elastic wave 4 When the upper and lower vibrations are made, the voice coil 5 can be fixedly held at the center of the magnetic circuit gap, and the voice coil 5 is adhered to the center of the radiation diaphragm 6. When the magnetic field cutting voice coil 5 generates a force to vibrate the upper and lower vibrations, the radiation diaphragm 6 is driven. Synchronous vibrations, which push the surrounding air to vibrate and produce sound waves.

The supporting structure, together with reference to FIG. 1, is a bracket 7, the bracket 7 is a basin-shaped structure, and the bottom of the basin-shaped structure is provided with a through hole, and the magnetic circuit structure is adhered to the bottom center of the bracket 7, in the radiation vibration structure. The elastic wave 4 is symmetrically distributed on both sides of the bottom center of the bracket 7 in the support structure. Specifically, the elastic wave 4 is disposed at the bottom of the bracket 7, and the radiation diaphragm 6 is fixed on the top of the bracket 7. Bomb wave 4 The upper end is bonded to the voice coil 5, and the voice coil 5 is symmetrically distributed at both ends of the Huashi 3 in the magnetic circuit system, and the top of the voice coil 5 is glued to the radiation diaphragm 6, and the edge of the radiation diaphragm 6 is adhered to the support structure. On the basin frame, a terminal plate 8 is connected to the outer side wall of the bracket 7, and a terminal connected to the voice coil 5 is fixed to the terminal plate 8. At the time of specific connection, the outer side wall of the bracket 7 is riveted to the terminal block 8, and the terminal plate 8 is connected to the voice coil 5 via a voice coil 5 wire.

During its operation, a magnetic field is generated by a magnet 2 bonded to the middle of the upper and lower magnets by upper and lower magnets (T-type iron 1, Huasi 3) in the magnetic circuit system, and a magnetic circuit is formed, thereby radiating with the radiation diaphragm 6 system. The voice coil 5 connected to the diaphragm 6 is bonded in the annular air gap at the center of the elastic wave 4. When the electric signal current passes through the voice coil 5, the voice coil 5 in the radiation diaphragm 6 system generates an electromagnetic field and is driven by the magnetic circuit system. The magnetic field of the magnet 2 of the upper and lower sides of the T-shaped iron 1 and the upper 3 interacts, so that the voice coil 5 generates a force of up and down vibration, and the voice coil 5 is connected to the radiation diaphragm 6, thereby driving the radiation diaphragm 6 as a piston. Movement, which pushes the surrounding air to vibrate and produces sound waves.

It can be seen from the above description that the external magnetic ultra-thin speaker provided by the embodiment adopts the structure of the radiation diaphragm 6 and uses the flat plate as the sounding body, and the coil acts as a driving force, and the radiated sound wave propagates in a omnidirectional manner, so that the sound field coverage is wider. It is convenient for TV installation, so that people can hear more ideal sounds at different angles; low-frequency response can be lower than similar speakers, so that people can hear low-frequency fullness; at the same time, the shape is thin, the volume is small, the space is small, and the application field is wider. Not only the material cost is low, but also the manufacturing process is simple, so that the overall cost of the product is low.

The present invention also provides an audio device comprising the external magnetic ultrathin speaker according to any of the above

The audio device provided in this embodiment adopts the above-mentioned external magnetic ultra-thin speaker structure, which adopts a radiation diaphragm structure, uses a flat plate as a sounding body, and the coil acts as a driving force to radiate sound wave omnidirectionality. Propagation, making the sound field coverage wider, easy to install TV, let people hear better sounds from different angles; low frequency response can be lower than similar speakers, making people listen to low frequency more full; at the same time thin and small The space is small and the applicable field is wider; not only the material cost is low, but also the manufacturing process is simple, so that the overall cost of the product is low.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the scope of the present invention. Inside.

Claims

An external magnetic ultrathin speaker, comprising:

a magnetic circuit structure comprising: a T-shaped iron, a magnet and a washer disposed on an upper vertical portion of the T-shaped iron, and the magnet is in contact with a horizontal portion of the T-shaped iron, the washer and the The magnet is in contact with one side of the horizontal portion;

The radiation vibration structure includes: an elastic wave disposed on a side of the washer facing away from the magnet, a radiation diaphragm disposed opposite to the elastic wave, and a voice coil, wherein one end of the voice coil is disposed The voice coil in the center hole of the elastic wave is fixedly connected to the radiation diaphragm at the other end.
The external magnetic ultrathin speaker according to claim 1, further comprising a support structure including a bracket, the elastic wave is fixed to a bottom of the bracket, and the radiation diaphragm is fixed to the bracket top.
The external magnetic ultrathin speaker according to claim 2, wherein a terminal plate is connected to an outer side wall of the bracket, and a terminal connected to the voice coil is fixed to the terminal plate.
The external magnetic ultrathin speaker according to claim 2, wherein a joint of the vertical portion of the T-shaped iron and the horizontal portion is provided with a shoulder structure, and the magnet is fitted over the shoulder on.
The external magnetic ultrathin speaker according to claim 1, wherein a diameter of a center hole of the washer is smaller than a diameter of a center hole of the magnet, and a diameter of a center hole of the washer is the same as The diameter of the central hole of the magnet is greater than the diameter of the vertical portion of the T-shaped iron.
The external magnetic ultrathin speaker according to claim 5, wherein said horizontal portion has a tapered recess coaxial with said vertical portion.
An audio device comprising the outer magnetic ultrathin speaker according to any one of claims 1 to 6.