CN114760572A

CN114760572A - Suspension type audio transducer and applied audio equipment

Info

Publication number: CN114760572A
Application number: CN202210405949.4A
Authority: CN
Inventors: 张森富; 其他发明人请求不公开姓名
Original assignee: Joining Free Technology Co ltd
Current assignee: Joining Free Technology Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-15

Abstract

A kind of suspended audio transducer, this audio transducer includes magnetic circuit, coil, shell fragment, transmits and shakes body and outer casing, one end of this coil is inserted into the magnetic field interval in the middle of the magnetic circuit, the magnetic circuit and coil inserted into magnetic circuit are fixed on the first surface of the shell fragment, this shell fragment is connected and fixed on transmitting and shaking the body rigidly with its second surface, this shell fragment is a symmetrical structure, from inside to outside fixed with transmitting and shaking the body, coil, magnetic circuit sequentially; the vibration transmission body is rigidly connected with the shell, and no fixed point or stress point exists between the magnetic circuit and the shell. The magnetic circuit is connected with the free end of the elastic sheet only, the magnetic circuit is designed on the elastic sheet in a suspension way, the coil vibrates under the action of current, and the elastic sheet and the coil are fixed on the shell, so that the relative vibration of the magnetic circuit is caused, and the relative vibration transmits energy to the shell to produce sound, thereby bringing about a high-quality loudspeaking effect.

Description

Suspension type audio transducer and applied audio equipment

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of audio, in particular to an audio transducer which utilizes the vibration of a coil in a magnetic circuit to drive a solid vibration transmission medium to produce sound.

[ background of the invention ]

The sound we can hear is due to the fact that pressure waves (also called sound waves) generated by a vibrating object propagate through a medium and are perceived by the human auditory organs. The medium may be a solid, liquid or gas. Since sound waves are not transmitted in a vacuum without a medium, no sound is heard in the vacuum.

The design principle of the traditional loudspeaker is as follows: the coil is acted by ampere force in the magnetic circuit, so as to drive the cone or the cone to generate vibration, and the vibration is transmitted to auditory organs through air medium, and finally, the result of hearing sound is realized. However, the conventional speaker is only suitable for air medium, and has no way to be used for some special application scenarios, such as underwater or hearing impaired patients caused by ear drum injury.

When the bone conduction type audio transducer works, the driver pushes the shell of the bone conduction loudspeaker to generate vibration, and the shell is tightly attached to the skin of a person and close to the skeleton of the person, so that the shell can bypass the external auditory canal and the tympanic membrane and directly transmits sound waves to auditory nerves of the brain by vibrating the skull, and the person can hear the sound.

However, the existing bone conduction type loudspeaker system needs to apply a soft stress to the vibration module, so that the vibration transmission body of the vibration module can be tightly attached to a medium (namely, a prestress is required to be pressed on human skin and bones), and the sound production effect is ensured by effectively transmitting vibration. However, the pre-applied soft stress is not easy to be realized in the product design and implementation mode, and the industrial production difficulty is large. The consistency of the finished product is difficult to ensure, so that the effect of the product cannot be ensured.

In addition, in the conventional bone conduction speaker, the magnetic circuit module is connected to the housing through the elastic member, and the coil is also fixed to the housing directly or through the connector. Because the shell has two stress areas simultaneously, and the two acting forces generated by the magnetic circuit and the coil to the shell are opposite in direction, the shell can be weakly deformed, and the vibration transmission efficiency is influenced to a certain extent.

[ summary of the invention ]

The invention provides a suspension type audio transducer aiming at the problems, and the audio transducer can be used for bone conduction type wearable audio equipment and can also be used for secondary forming loudspeaker equipment which is arranged in other fixed material equipment and is formed by driving other media.

The invention relates to a suspension type audio transducer which is characterized by comprising a magnetic loop, a coil, an elastic sheet, a vibration transmission body and a shell, wherein one end of the coil is inserted into a magnetic field gap in the middle of the magnetic loop; the vibration transmission body is rigidly connected with the shell, and no fixed point or stress point exists between the magnetic circuit and the shell.

The magnetic circuit comprises a magnet, a first magnetic conduction element and a second magnetic conduction element, wherein the first magnetic conduction element is made into a U-shaped cover body, the magnet and the second magnetic conduction element are sequentially arranged at the inner top of the U-shaped cover body, and a magnetic field gap suitable for inserting the coil into the magnetic field gap is formed between the second magnetic conduction element and the first magnetic conduction element.

The magnetic circuit comprises a magnet, a first magnetic conductive element and a second magnetic conductive element, wherein the first magnetic conductive element is made into a T-shaped cover body, the outer side of the T-shaped cover body is sequentially provided with an annular magnet and an annular second magnetic conductive element, and a magnetic field gap suitable for inserting a coil into the magnetic field gap is formed between the second magnetic conductive element and the first magnetic conductive element.

The audio transducer further comprises a vibration transmission body fixing seat which is arranged outside the vibration transmission body and is directly and rigidly fixed with the shell/integrally formed with the shell.

The first magnetic conductive element in the magnetic circuit is made of magnetic conductive material, the shape of the first magnetic conductive element is an inverted U-shaped round cover body, a cylindrical magnet is fixed in the middle of the inside of the first magnetic conductive element, and the bottom of the magnet is provided with a second magnetic conductive element which is a washer made of magnetic conductive material.

The first magnetic conductive element in the magnetic circuit is made of magnetic conductive material, the shape of the first magnetic conductive element is a T-shaped round cover body, the outer side of the first magnetic conductive element is provided with a cylindrical annular magnet, the bottom of the magnet is provided with a second magnetic conductive element, and the second magnetic conductive element is a washer made of magnetic conductive material.

The coil is fixed on the first surface of the elastic sheet, and the symmetry center of the elastic sheet is superposed with the symmetry center of the coil.

The center of the second surface of the elastic sheet is fixed on the vibration transmission body and the vibration transmission body fixing seat, and the edge of the outer ring of the elastic sheet is a free end.

An audio device comprises the suspension type audio transducer and the vibration transmission medium, wherein the vibration transmission medium is a shell or a main body of a molded product, and the suspension type audio transducer and the vibration transmission body are fixedly arranged on the vibration transmission medium in a rigid connection mode to form the audio device.

In the audio device, the vibration transmitting medium includes, but is not limited to, a metal material, a bone magnetic material, and wood.

The magnetic circuit is connected with the free end of the elastic sheet only, the magnetic circuit is designed on the elastic sheet in a suspension way, the coil vibrates under the action of current, and the elastic sheet and the coil are fixed on the shell, so that the relative vibration of the magnetic circuit is caused, and the relative vibration transmits energy to the shell to produce sound, thereby bringing about a high-quality loudspeaking effect.

[ description of the drawings ]

Fig. 1 is a schematic view of an embodiment 1 of a suspension-type audio transducer according to the present invention;

fig. 2 is a schematic structural diagram of a suspension-type audio transducer of an embodiment 1 according to the present invention;

fig. 3 is a schematic diagram of a suspended audio transducer embodiment 2 in accordance with the present invention;

fig. 4 is a schematic diagram of a suspended audio transducer embodiment 3 in accordance with the present invention;

in the figure: 10. A vibration transmitting body; 20. a vibration transmission body fixing seat; 30. a coil; 40. a spring plate; 50. a housing; 70. a magnet; 80. a first magnetically permeable material; 90. a second magnetically permeable material;

80', U iron; 70a, a first magnet; 70b, a second magnet; 90' and washer.

[ detailed description ] embodiments

The invention will be described in detail below with reference to the drawings, wherein examples of the embodiments are shown in the drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Fig. 1 and 2 are schematic structural views of a suspension type audio transducer according to the present invention, wherein fig. 1 is a schematic structural diagram, and fig. 2 is a structural diagram of an industrial product.

Example 1:

referring to fig. 1 and 2, the suspension type audio transducer includes a magnetic circuit, a coil 30, a spring plate 40, a vibration transmission body 10 and a housing, wherein one end of the coil 30 is inserted into a magnetic field gap in the middle of the magnetic circuit, the magnetic circuit and the coil 30 inserted into the magnetic circuit are both fixed on a first surface of the spring plate 40, the spring plate 40 is rigidly connected and fixed on the vibration transmission body 10 by a second surface thereof, the spring plate 40 is of a symmetrical structure and is fixed with the vibration transmission body 10, the coil 30 and the magnetic circuit from inside to outside in sequence; the vibration transmission body 10 is rigidly connected with the shell 50, and no fixed point or force bearing point exists between the magnetic circuit and the shell 50.

The magnetic circuit comprises a magnet 70, a first magnetic conductive element 80 and a second magnetic conductive element 90, wherein the first magnetic conductive element 80 is made as a U-shaped cover body, which we may refer to as U-iron, and is provided with the magnet 70 and the second magnetic conductive element 90 in sequence on the inner top thereof, and a magnetic field gap suitable for inserting the coil 30 therein is formed between the second magnetic conductive element 90 and the first magnetic conductive element 80, the magnetic field gap is capable of generating a uniform magnetic field, and the coil 30 is provided in the magnetic field gap.

Referring to fig. 2, the audio transducer further includes a vibration transmitter holder 20, and the vibration transmitter holder 20 is disposed outside the vibration transmitter 10 and directly rigidly fixed to/integrally formed with the housing 50.

The first magnetic conductive element 80 in the magnetic circuit is made of magnetic conductive material, and is in the form of an inverted "U" -shaped round cover body, generally called as U-iron, and a cylindrical magnet 70 is fixed in the middle of the inside of the cover body, and a second magnetic conductive element 90 is arranged at the bottom of the magnet 70, and the second magnetic conductive element 90 is a washer made of magnetic conductive material.

The coil 30 is fixed on the first surface of the spring 40, and the center of symmetry of the spring 40 coincides with the center of symmetry of the coil 30.

The center of the second surface of the elastic sheet 40 is fixed on the vibration transmission body 10 and the vibration transmission body fixing seat 20, the outer ring edge of the elastic sheet 40 is a free end, the outer ring edge is not limited and fixed by external force, the magnetic loop is fixed at the free end of the elastic sheet, the whole magnetic loop is not fixed with other parts except the outer ring edge of the elastic sheet which is freely bounced, other stress points and fixing points are not provided, and the elastic sheet is suspended in the shell.

The largest difference between the suspended audio transducer designed by the application and the conventional audio equipment is in the suspended design of the magnetic circuit, the structure attached figure 1 shows that the magnetic circuit is only connected with the free end of the elastic sheet directly, the magnetic circuit is suspended on the elastic sheet, the coil vibrates under the action of current, and the elastic sheet and the coil are fixed on the shell, so that the relative vibration of the magnetic circuit part is caused, the relative vibration transmits energy to the shell to produce sound, and the high-quality loudspeaking effect is achieved.

Example 2:

referring to fig. 3, which shows a schematic diagram of the structure of embodiment 2, the difference between this embodiment and embodiment 1 is that the magnetic circuit is different, in which the first magnetic permeable element 80 is made of magnetic permeable material and is in the form of a "T" shaped round cap, which may be generally called T-iron, and is provided with a cylindrical ring magnet 70 on the outer side, and a second magnetic permeable element 90 is provided at the bottom of the magnet 70, where the second magnetic permeable element 90 is a washer made of magnetic permeable material. This is also a classical configuration of the magnetic circuit design, which also serves to generate a stable and uniform magnetic field and also forms a magnetic field gap into which the coil is inserted.

Example 3:

referring to fig. 4, there is shown a schematic structural diagram of embodiment 3, in which a U-iron 80 ' is adopted as a structural design of the first magnetic conductive material, a first magnet 70a and a second magnet 70b are arranged in the U-iron 80 ', and a washer 90 ' is arranged between the first magnet 70a and the second magnet 70b as a second magnetic conductive material. A stable and uniform magnetic circuit design is also achieved, which is fixed to the first surface of the spring plate 40, which is fixed with its second surface to the vibration transfer body 10.

The suspension type audio transducer is fixedly arranged on the vibration transmission medium in a rigid connection mode to form the audio equipment.

Vibration transmitting media include, without limitation, metallic materials, bone-magnetic materials, and wood.

Specifically, the audio device manufactured by applying the transducer is not limited to the earphone, and any hard rigidity (a certain selection standard) can be used as the speaker device by configuring the audio transducer, and the speaker is rigidly arranged on the hard finished shell by fixing the vibration transmission body of the audio transducer, so that the audio device is obtained.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims

1. A suspension type audio transducer is characterized by comprising a magnetic loop, a coil, an elastic sheet, a vibration transmission body and a shell, wherein one end of the coil is inserted into a magnetic field gap in the middle of the magnetic loop, the magnetic loop and the coil inserted into the magnetic loop are fixed on a first surface of the elastic sheet, the elastic sheet is rigidly connected and fixed on the vibration transmission body through a second surface of the elastic sheet, the elastic sheet is of a symmetrical structure and is fixed with the vibration transmission body, the coil and the magnetic loop from inside to outside in sequence; the vibration transmission body is rigidly connected with the shell, and no fixed point or stress point exists between the magnetic circuit and the shell.

2. The suspension-type audio transducer according to claim 1, wherein the magnetic circuit comprises a magnet, a first magnetic conductive element and a second magnetic conductive element, wherein the first magnetic conductive element is formed as a U-shaped cover body, the magnet and the second magnetic conductive element are sequentially arranged at the inner top part of the U-shaped cover body, and a magnetic field gap suitable for inserting the coil is formed between the second magnetic conductive element and the first magnetic conductive element.

3. The levitated audio transducer according to claim 1, wherein the magnetic circuit comprises a magnet, a first magnetically permeable member and a second magnetically permeable member, wherein the first magnetically permeable member is formed as a T-shaped cover body, on the outside of which there are provided in sequence the annular magnet and the annular second magnetically permeable member, the second magnetically permeable member and the first magnetically permeable member defining therebetween a magnetic field gap adapted to allow the coil to be inserted therein.

4. The suspended audio transducer of claim 1, further comprising a vibration transmitter holder disposed outside the vibration transmitter and rigidly fixed/integrally formed with the housing.

5. The suspension-type audio transducer according to claim 2, wherein the first magnetic conductive element in the magnetic circuit is made of magnetic conductive material and is in the form of an inverted "U" -shaped circular lid, a cylindrical magnet is fixed in the middle of the inside of the lid, and a second magnetic conductive element is arranged at the bottom of the magnet and is a washer made of magnetic conductive material.

6. The suspended audio transducer according to claim 3, wherein the first magnetic conductive element of the magnetic circuit is made of a magnetic conductive material, and is in the form of a "T" -shaped circular cover, and a cylindrical ring-shaped magnet is provided on the outer side of the first magnetic conductive element, and a second magnetic conductive element is provided on the bottom of the magnet, and the second magnetic conductive element is a washer made of a magnetic conductive material.

7. The suspension audio transducer of claim 2, wherein the coil is secured to the first surface of the spring, the center of symmetry of the spring coinciding with the center of symmetry of the coil.

8. The suspended audio transducer of claim 4, wherein the second surface of the spring plate is fixed at a center portion thereof to the vibration transmitting body and the vibration transmitting body fixing base, and an outer circumferential edge of the spring plate is a free end.

9. An audio device comprising the suspension-type audio transducer according to any one of claims 1 to 8 and a vibration transmitting medium, wherein the vibration transmitting medium is an outer shell or a main body of a molded product, and the suspension-type audio transducer and the vibration transmitting body are fixedly arranged on the vibration transmitting medium in a rigid connection manner to form the audio device.

10. The audio device of claim 9, wherein the vibration transmitting medium includes, without limitation, a metallic material, a bone-magnetic material, and wood.