WO2020258274A1

WO2020258274A1 - Bone conduction loudspeaker and earphone

Info

Publication number: WO2020258274A1
Application number: PCT/CN2019/093802
Authority: WO
Inventors: 蒋泽全; 张科宇
Original assignee: 深圳市金泰坦科技有限公司
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-30

Abstract

Disclosed are a bone conduction loudspeaker and an earphone. The bone conduction loudspeaker comprises a driving mechanism; an audio conversion mechanism comprising a sound hammer, wherein the sound hammer comprises a hammer head and a first cantilever, and the first cantilever is connected to the driving mechanism; and an amplitude transmission mechanism comprising a vibration device and a shell, wherein the shell comprises a shell body, and the vibration device is fixed on the shell body. After receiving energy having an audio signal, the driving mechanism converts the energy into mechanical energy to drive the sound hammer to beat the vibration device to vibrate, and a vibration signal is transmitted to a skull by means of the amplitude transmission mechanism, such that a human body feels sound. Since the hammer head does not directly beat the shell body and does not need to strike a contact surface of a head of a person, audio vibration is emitted in advance, the contact surface between the loudspeaker (or the earphone) and the head of the person is merely used as a transmission interface, audio vibration is transmitted to the skull of the person, and then the person feels sound, such that injury caused by the frequent striking of a conventional bone conduction earphone on the head of a person is prevented.

Description

Bone conduction speaker and earphone

Technical field

This application relates to bone conduction technology, in particular to a bone conduction speaker and earphone.

Background technique

The bone conduction speaker is completely different from the traditional diaphragm type speaker. The bone conduction speaker is a speaker that can hear the sound without using the eardrum. By converting the audio signal into mechanical vibration, it is directly transmitted to the skull and then to the auditory center. , A speaker that makes people feel the sound. It is completely different from the traditional vibrating membrane speaker, and does not need to use a human eardrum to listen.

The bone conduction earphones currently on the market mainly hit the shell through the internal driving device, and transmit the vibration to the human skull, and then make people feel the sound. In this way of earphones, if the power is too low, no sound can be felt, and if the power is too high, the impact on the head will increase, causing uncomfortable or even uncomfortable head.

Summary of the invention

technical problem

The solution to the problem

Technical solutions

This application provides a bone conduction speaker and earphone.

According to the first aspect of the present application, the present application provides a bone conduction speaker, including a driving mechanism, an audio conversion mechanism, and an amplitude transmission mechanism;

The driving mechanism is used to receive energy with audio signals and convert it into mechanical energy to drive the audio conversion mechanism;

The audio conversion mechanism includes a hammer, the hammer includes a hammer head and a first cantilever, the hammer head is arranged on the first cantilever, and the first cantilever is connected to the driving mechanism;

The amplitude transmission mechanism includes a vibrating device and a housing, and the vibrating device is matched with the hammer. The housing includes a housing and a sealing cover. The housing encloses a cavity and closes an opening at one end. The cover is arranged at the open end, the driving mechanism, the audio conversion mechanism and the amplitude transmission mechanism are arranged in the cavity, and the vibration device is fixed on the housing;

The driving mechanism receives the energy with the audio signal and converts it into mechanical energy to drive the hammer to hit the vibrating device to vibrate, and the vibration signal is transmitted to the skull through the amplitude transmission mechanism to make the human body feel the sound.

According to the second aspect of the present application, the present application provides a bone conduction earphone, including the above-mentioned bone conduction speaker.

Due to the adoption of the above technical solutions, the beneficial effects of this application are:

In the embodiment of the present application, it includes a driving mechanism, an audio conversion mechanism and an amplitude transmission mechanism. The audio conversion mechanism includes a hammer head and a first cantilever. The hammer head is arranged on the first cantilever. The first cantilever is connected to the driving mechanism and the amplitude transmission mechanism. Including a vibrating device and a shell, the vibrating device and the hammer are matched. The shell includes a shell and a sealing cover. The sealing cover is arranged at the open end of the shell. The vibration device is fixed on the shell. The driving mechanism receives the energy with the audio signal and converts it The mechanical energy is used to drive the hammer to beat the vibrating device to vibrate, and the vibration signal is transmitted to the skull through the shell, so that the human body can feel the sound. Since the hammer does not directly hit the shell, there is no need to strike the contact surface of the human head. By sending out audio vibrations in advance, only the contact surface between the speaker (or earphone) and the human head is used as a transmission interface to transmit to the human skull, and then people can feel the sound, avoiding the frequent use of conventional bone conduction headphones on the human head Damage caused by impact.

The beneficial effects of the invention

Brief description of the drawings

Description of the drawings

FIG. 1 is a schematic diagram of the structure of the bone conduction speaker in an embodiment;

Fig. 2 is a schematic structural diagram of the bone conduction speaker in the first embodiment in another embodiment;

FIG. 3 is a schematic structural diagram of the bone conduction speaker in the second embodiment in an embodiment;

Fig. 4 is a schematic structural diagram of the bone conduction speaker in the second embodiment in another embodiment.

Invention embodiment

Embodiments of the invention

Hereinafter, the present invention will be further described in detail through specific embodiments in conjunction with the drawings. This application can be implemented in many different forms and is not limited to the implementation described in this embodiment. The following specific implementations are provided for the purpose of facilitating a clearer and thorough understanding of the disclosure of the present application. The words indicating directions such as up, down, left, and right are only for the position of the structure shown in the corresponding drawings.

However, those skilled in the art may realize that the detailed description of one or more of them may be omitted, or other methods, components or materials may also be used. In some examples, some implementations are not described or detailed.

The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning.

In addition, the technical features and technical solutions described herein can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the method related to the embodiments provided herein can also be changed. Therefore, any order in the drawings and embodiments is only for illustrative purposes, and does not imply that a certain order is required, unless it is clearly stated that a certain order is required.

Example one:

As shown in Figs. 1 and 2, an implementation of the bone conduction speaker of the present application includes a driving mechanism 11, an audio conversion mechanism, and an amplitude transmission mechanism.

The driving mechanism 11 is used to receive energy with audio signals and convert it into mechanical energy to drive the audio conversion mechanism;

The audio conversion mechanism includes a hammer. The hammer includes a first cantilever 21 and a hammer head 22. The hammer head 22 is arranged on the first cantilever 21, and the first cantilever 21 is connected to the driving mechanism 11.

The amplitude transmission mechanism includes a vibrating device and a housing, the vibrating device and the hammer are matched. The housing includes a housing 31 and a sealing cover 32. The housing 31 encloses the cavity 33 and has one end closed with one end open. The sealing cover 32 is arranged at the open end, and the drive mechanism 11. The audio frequency conversion mechanism and the amplitude transmission mechanism are arranged in the cavity 33, and the vibration device is fixed on the housing 31.

The driving mechanism 11 receives the energy with the audio signal and converts it into mechanical energy to drive the hammer to beat the vibrating device to generate vibration, and transmit the vibration signal to the skull through the amplitude transmission mechanism, so that the human body can feel the sound.

Further, the audio conversion mechanism further includes a sound stopper. The sound stopper includes a second cantilever 23 and a sound stop pad 24. The sound stop pad 24 is arranged on the second cantilever 23, and the second cantilever 23 is connected to the first cantilever 22 to stop The sound pad 24 cooperates with the vibration device. The silencer pad 24 presses the audio vibration device (such as a vibrating plate or a vibrating wire) to reduce or eliminate the reverberation of the audio vibration device.

Further, the first cantilever 21 can be made into various shapes, and in this embodiment, the first cantilever 21 is L-shaped. The second cantilever 23 can also be made into various shapes. In this embodiment, the second cantilever 23 is L-shaped.

In this application, the hammer head 22 and the sound-damping pad 24 are respectively located above and below the vibrating device, that is, the hammer head 22 may be located above the vibrating device, and the sound-damping pad 24 may be located below the vibrating device; or, the hammer head 22 may be located on the vibration device Below the device, the silencer pad 24 may be located above the vibrating device.

Further, the vibrating device may include a metal sheet 41, a metal wire 42, horsehair or high-strength rayon filaments or the like. In an embodiment, the metal sheet 41 may be disposed on the housing 31 through the first fixing post 43. One first fixing post 43 can be provided. In another embodiment, the metal wire 42 can be arranged on the housing 31 through the second fixing post 44, two second fixing posts 44 can be arranged, and both ends of the metal wire 42 are respectively fixed to the two second fixing posts. 44 on. The installation method of the horsehair and the high-strength rayon yarn can be the same as the installation method of the metal wire 42.

Further, the driving mechanism 11 may include an electromagnetic coil or a piezoelectric device (not shown), and the piezoelectric device may include a piezoelectric sheet or a piezoelectric ceramic.

Further, the housing may further include a sealing ring 34. In one embodiment, the housing 31 is provided with a support platform 35, the sealing ring 34 is provided on the support platform 35, and the sealing cover 32 presses the sealing ring 34. In another embodiment, the housing 31 has a limiting groove, the sealing ring 34 is arranged in the limiting groove, and the sealing cover 32 presses the sealing ring 34.

Further, the support platform 35 may be cylindrical, and the bottom is provided at the closed end of the housing 31, that is, the bottom 36 of the housing is provided.

Further, the hammer may include one or more. By adjusting the material, thickness, width, diameter and/or length of the audio vibration device (such as vibrating plate, vibrating wire, etc.), the material of the hammer head is adjusted to achieve a mixture of different treble, midrange and/or bass.

Working process: The sealing plate of the waterproof and sealed enclosure, depending on the driving source, can be connected to the outside by a line, such as a power source driven by an electromagnetic coil or a piezoelectric drive. There can be ways of connecting sound tubes, such as a power source driven by air. When the driving mechanism receives the input energy with audio signals, the driving mechanism will drive different hammer heads to reciprocate according to the audio energy signal in the energy. When the hammer head moves toward the audio vibrating device (vibrating plate or vibrating wire), the sound stopper first leaves the vibrating device (vibrating plate or vibrating wire) to keep the vibrating device (vibrating plate or vibrating wire) in the air. The head continues to move toward the audio vibrating device (vibrating plate or vibrating wire), knocking the audio vibrating device (vibrating plate or vibrating wire), so that the audio vibrating device (vibrating plate or vibrating wire) emits corresponding vibration, through the audio vibrating device (vibrating wire) The material, thickness, width, diameter, length, etc. of the plate or vibrating wire), as well as the different materials of the hammer head, to achieve a mixture of different treble, midrange, bass and other sound qualities, and then pass the amplitude transmission mechanism in the The shell transmits the vibration information generated by the vibration to the skull, making people feel the sound.

Embodiment two:

The difference between the second embodiment and the first embodiment is that, as shown in Figs. 3 and 4, the housing 31 may also include a conductive plate 37. The conductive plate 37 is arranged at the bottom of the housing 31, and the vibration device is fixed to the housing 31 through the conductive plate. on.

Example three:

An implementation of the bone conduction earphone of the present application includes the bone conduction speaker in the first embodiment or the second embodiment.

The above content is a further detailed description of this application in combination with specific implementations, and it cannot be considered that the specific implementation of this application is limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, several simple deductions or substitutions can be made without departing from the concept of this application.

Claims

A bone conduction speaker, characterized in that it comprises a driving mechanism, an audio frequency conversion mechanism and an amplitude transmission mechanism;

The driving mechanism is used to receive energy with audio signals and convert it into mechanical energy to drive the audio conversion mechanism;

The audio conversion mechanism includes a hammer, the hammer includes a hammer head and a first cantilever, the hammer head is arranged on the first cantilever, and the first cantilever is connected to the driving mechanism;

The amplitude transmission mechanism includes a vibrating device and a housing, and the vibrating device is matched with the hammer. The housing includes a housing and a sealing cover. The housing encloses a cavity and closes an opening at one end. The cover is arranged at the open end, the driving mechanism, the audio conversion mechanism and the amplitude transmission mechanism are arranged in the cavity, and the vibration device is fixed on the housing;

The driving mechanism receives the energy with the audio signal and converts it into mechanical energy to drive the hammer to hit the vibrating device to vibrate, and the vibration signal is transmitted to the skull through the amplitude transmission mechanism to make the human body feel the sound.
The bone conduction speaker according to claim 1, wherein the audio conversion mechanism further comprises a sound stopper, the sound stopper comprising a second cantilever and a sound stop pad, and the sound stop pad is arranged on the first On the second cantilever, the second cantilever is connected to the first cantilever, and the soundproof pad is matched with the vibration device.
The bone conduction speaker according to claim 2, wherein the first cantilever includes an L-shape, and the second cantilever includes an L-shape.
The bone conduction speaker according to claim 3, wherein the hammer head and the sound-proof pad are respectively located above and below the vibrating device.
The bone conduction speaker according to claim 1, wherein the vibration device comprises a metal sheet or a metal wire.
The bone conduction speaker according to claim 1, wherein the driving mechanism comprises an electromagnetic coil or a piezoelectric device.
The bone conduction speaker according to any one of claims 1 to 6, wherein the housing further comprises a sealing ring, the housing is provided with a supporting platform, and the sealing ring is arranged on the supporting platform, The sealing cover compresses the sealing ring.
8. The bone conduction speaker according to claim 7, wherein the support platform is cylindrical, and the bottom is arranged at the closed end of the housing.
The bone conduction speaker according to any one of claims 1 to 6, wherein the housing further comprises a conductive plate provided at the bottom of the housing, and the vibration device is fixed to the housing through the conductive plate. Physically.
The bone conduction speaker according to claim 9, wherein the hammer includes one or more.
The bone conduction speaker of claim 10, wherein the material, thickness, width, diameter, and/or length of the audio vibration device are adjusted to adjust the material of the hammer head to achieve different treble and midrange Mixing of sound and/or bass.
A bone conduction earphone, characterized by comprising the bone conduction speaker according to any one of claims 1 to 11.