CN112333598A

CN112333598A - Earmuff and head-mounted bone conduction earphone

Info

Publication number: CN112333598A
Application number: CN202011314964.5A
Authority: CN
Inventors: 张俊平; 徐礼果; 叶灵燚; 朱孟; 邓旭东; 黄昱田
Original assignee: Jiangxi Lianchuang Sound Macro Electronic Co ltd
Current assignee: Jiangxi Lianchuang Sound Macro Electronic Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-02-05
Anticipated expiration: 2040-11-20
Also published as: CN112333598B

Abstract

The invention discloses an earmuff and a headset, wherein the earmuff comprises a substrate, a shell and an ear pad which are arranged on two opposite side surfaces of the substrate, a loudspeaker which is arranged in the shell and fixed on the substrate, and screen cloth which is embedded on the substrate and is far away from one side of the shell, the earmuff further comprises a bone conduction microphone which is arranged in the ear pad, one end of the bone conduction microphone extends outwards to form a positioning sheet, the size of the positioning sheet is larger than that of the bone conduction microphone, the bone conduction microphone is connected with one side, close to the ear of a human body, of the ear pad through the positioning sheet, and the output end of the bone conduction microphone is connected with the input end of communication equipment. The ear muffs solve the problem that in the prior art, the earphone has poor anti-noise performance in the use process, so that the conversation is not clear.

Description

Earmuff and head-mounted bone conduction earphone

Technical Field

The invention relates to the field of acoustic devices, in particular to earmuffs and a head-wearing bone conduction earphone.

Background

Earphones (Earphones, heads-sets, earpoints) are used as a conversion unit, can receive electric signals sent by a media player or a receiver, and convert the electric signals into audible sound waves by using a loudspeaker close to ears, have the advantages that the Earphones can independently listen to sound without influencing other people, can isolate sound of the surrounding environment, are very helpful for people who use the Earphones in a noisy environment such as a recording room, a bar, a trip, sports and the like, and are widely used in the fields of mobile phones, walkman, radios, portable electric games, digital audio players and the like along with the popularization of portable electronic devices.

Traditional headphone send a telephone subtotal adopts the stem, and built-in air guide formula microphone realizes the pickup function of sending a telephone, and when the microphone picked up the speech of sending a telephone, external noise was picked up simultaneously, in daily use, showed well in comparatively quiet office environment, but in public place or the place that external environment is noisy, traditional microphone's sound transmission can lead to the conversation unclear because of the interference that receives external noise.

Disclosure of Invention

In view of this, the present invention provides an earmuff, which aims to solve the problem in the prior art that the earphone has poor anti-noise performance during use, thereby causing unclear conversation.

The earmuff provided by the invention comprises a substrate, a shell and an ear pad which are arranged on two opposite side surfaces of the substrate, a loudspeaker which is arranged in the shell and fixed on the substrate, and screen cloth which is embedded on the substrate and is far away from one side of the shell, and the earmuff further comprises a bone conduction microphone which is arranged in the ear pad, wherein one end of the bone conduction microphone extends outwards to form a positioning sheet, the size of the positioning sheet is larger than that of the bone conduction microphone, the bone conduction microphone is connected with one side of the ear pad, which is close to the ear of a human body, through the positioning sheet, and the output end of the bone conduction microphone is connected with the input end of communication equipment.

The earmuff is provided with the bone conduction microphone in the ear pad, when the earmuff is worn, the bone conduction microphone is attached to the ear of a human body through the ear pad, so that the bone conduction microphone is attached to the inner ear bone beside the ear of the human body, the vibration signal generated by the vibration of the skull when a user speaks is fully picked up through the bone conduction microphone, the vibration signal is converted into an electric signal, the electric signal is output through communication equipment, the microphone function is realized, high-definition sound is still output under the strong noise environment because air is not needed as a sound transmission medium, the positioning sheet is arranged at one end of the bone conduction microphone, the size of the positioning sheet is larger than that of the bone conduction microphone, when the earmuff is used, the positioning sheet is attached to the ear of the human body, the vibration signal generated by the vibration of the skull can be effectively picked up by the bone conduction microphone, the microphone effect is further improved, and the prior art is solved, the earphone has poor anti-noise performance in the using process, thereby causing the problem of unclear conversation.

In addition, the earmuff provided by the invention can also have the following additional technical characteristics:

furthermore, an output terminal is arranged on one side of the shell and penetrates through the shell, and the bone conduction microphone is electrically connected with the output terminal through a lead.

Furthermore, a through hole is formed in the ear pad, and the lead penetrates through the ear pad through the through hole and is electrically connected with the output terminal.

Further, form the cavity in the ear pad, be filled with in the cavity and inhale the sound cotton, the spacer is through the embedding inhale the sound cotton with the ear pad is connected.

Further, the locating piece is oval.

Further, when the earmuff is worn on the human ear, the bone conduction microphone is attached to the cheekbones in front of the tragus of the human ear.

Further, the spacer includes spacing portion and by the fixed part that spacing portion outwards extended, spacing portion be used for with the ear pad is close to human ear one side and is connected, the fixed part is used for the parcel bone conduction microphone.

Furthermore, the substrate and the mesh are enclosed to form a first front cavity, the speaker and the substrate are enclosed to form a second front cavity, and the substrate and the shell are enclosed to form a rear cavity.

Furthermore, a positioning groove is formed in the substrate, the loudspeaker is buckled on the positioning groove in a reversed mode, and the loudspeaker and the positioning groove are enclosed to form the second front cavity.

The invention also provides a head bone conduction headset, which comprises a head band and earmuffs respectively arranged at two ends of the head band, wherein the earmuffs are the earmuffs.

Above-mentioned wear-type bone conduction earphone makes earmuff and cheek sealed laminating through the clamp force of bandeau again through the foretell earmuff of configuration for wear bone conduction earphone and obtain better noise reduction performance, use also to have excellent conversation performance under noise environment.

Drawings

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

fig. 2 is a schematic cross-sectional view of an earmuff according to a first embodiment of the invention;

fig. 3 is a schematic view of a connection structure of an ear cushion and a bone conduction microphone in an earmuff according to a first embodiment of the present invention;

fig. 4 is a schematic cross-sectional view showing a connection structure of an ear pad and a bone conduction microphone in an earmuff according to a first embodiment of the present invention;

FIG. 5 is a frequency response graph of the ear cup proposed in the first embodiment of the present invention under the vibration acceleration test condition of 0.316 g;

FIG. 6 is a graph showing distortion of the ear cup proposed in the first embodiment of the present invention under the vibration acceleration test condition of 0.316 g;

FIG. 7 is a diagram illustrating a test of the physical noise reduction performance of an earmuff according to a first embodiment of the present invention;

fig. 8 is a schematic sectional view showing a connection structure of an ear pad and a bone conduction microphone in an earmuff according to a second embodiment of the present invention.

Description of the main element symbols:

substrate	10	Shell body	20
				Output terminal	21	Ear pad	30
Bone conduction microphone	31	Sound-absorbing cotton	32
				Positioning sheet	33	Limiting part	331
Fixing part	332	Loudspeaker	40
				Net cloth	50	Locating slot	60
First front cavity	71	Second front cavity	72
				Rear cavity	80

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, the earmuff according to the first embodiment of the present invention includes a substrate 10, a shell 20 and an ear pad 30 disposed on two opposite sides of the substrate 10, a speaker 40 disposed in the shell 20 and fixed on the substrate 10, and a mesh 50 inlaid on the substrate 10 and away from the shell 20, wherein:

the ear muff is loop configuration, and encircles the setting along the edge of base plate 10, and when wearing, earflap 30 covers at human ear, has fine laminating nature with the ear, and makes speaker 40 isolated with the outside, has good noise insulation effect, and screen cloth 50 inlays and on base plate 10, mainly plays the effect of adjusting tone quality and blockking the foreign matter.

The bone conduction microphone 31 is disposed in the ear pad 30, and in this embodiment, for convenience of disposing the bone conduction microphone 31, a cavity is formed in the ear pad 30, the cavity is filled with sound-absorbing cotton 32, a positioning plate 33 extends from one side of the bone conduction microphone 31, the positioning plate 33 is embedded in the sound-absorbing cotton 32 to connect the bone conduction microphone 31 with the ear pad 30, and specifically, the bone conduction microphone 31 and the positioning plate 33 are fixed by glue injection.

In addition, in order to facilitate the bone conduction microphone 31 to pick up a vibration signal generated by the vibration of the skull bone of the human body, the bone conduction microphone 31 is provided on the side close to the ear of the human body when the ear pad 30 is worn; specifically, when the earmuff is worn on the ear of the human body, the bone conduction microphone 31 is attached to the cheekbones in front of the tragus of the ear of the human body.

It can be appreciated that when the wearer speaks, the cheekbones in front of the tragus vibrate more, and the cheekbone contact plane in front of the tragus is larger, facilitating the bone conduction microphone 31 to pick up the vibration signal.

In the embodiment, a skin-friendly sheepskin is further disposed at the periphery of the ear pad 30 to increase the comfort between the ear pad 30 and the ear when the earmuff is worn.

It should be further noted that, in the present embodiment, since the inner periphery of the ear pad 30 is wrapped by the sound-absorbing cotton 32, the bone conduction microphone 31 is in a flexible positioning state in the ear pad 30 due to the elastic effect of the sound-absorbing cotton 32, and since the periphery of the ear pad 30 is wrapped by the sound-absorbing cotton 32, the "auscultation effect" of the bone conduction microphone 31 can be eliminated, and the earphone wearing experience can be improved.

Auscultation effect: that is, when wearing the earphone or the touch ear pad 30, the fine vibration signal is picked up by the bone microphone due to the friction or the touch of the outer surface of the ear pad, and the generated noise is absorbed by the sound absorption cotton 32 filled in the ear pad 30, so that the fine vibration signal generated by the friction or the touch of the outer surface of the ear pad is prevented from being picked up by the bone microphone when wearing the earphone or the touch ear pad 30.

In addition, in order to realize the transmitting function of the bone conduction transmitter 31, the bone conduction transmitter 31 is electrically connected to the communication device, specifically, an output terminal 21 is disposed on one side of the housing 20, the output terminal 21 is disposed through the housing 20, one end of the output terminal 21 is used for electrically connecting to the bone conduction transmitter 31, and the other end of the output terminal 21 is used for electrically connecting to the communication device, so as to realize the electrical connection between the bone conduction transmitter 31 and the communication device, more specifically, a through hole (not shown) is disposed on the ear pad 30, and a lead is respectively electrically connected to the output terminal 21 and the bone conduction transmitter 31 by passing through the through hole through the ear pad 30.

The bone conduction speech transmission technology is realized by collecting vibration signals and converting the vibration signals into electric signals to be output by utilizing slight vibration of head and neck bones caused by speaking of a person, and high-definition sound can be output under a strong noise environment because air is not required to be used as a sound transmission medium.

It can be understood, through set up bone conduction microphone 31 in ear pad 30, when wearing, through ear pad 30 and human ear's laminating, make bone conduction microphone 31 and the other inboard auricle laminating of human ear, the vibration signal that the skull vibration produced when fully picking up the user and speaking through bone conduction microphone 31, and turn into the signal of telecommunication with the vibration signal, and pass through the communication equipment output with the signal of telecommunication, realize the function of sending a telephone, because of need not the air as the sound transmission medium, so still have higher definition sound output under strong noise environment.

In the embodiment, in order to further improve the transmission effect of the bone conduction transmitter 31, the positioning piece 33 is set to be larger than the bone conduction transmitter 31, and the positioning piece 33 is set to be elliptical, so that when the positioning device is used, the positioning piece 33 can be well attached to the ear of a human body, the vibration signal generated by the skull bone vibration picked up by the bone conduction transmitter 31 can be effectively expanded, and the transmission effect of the bone conduction transmitter 31 is further improved; in some alternative embodiments of the present invention, the shape of the positioning plate may be square, circular or other shapes, which may be selected according to actual situations.

In this embodiment, the substrate 10 and the mesh 50 enclose a first front cavity 71, the speaker 40 and the substrate 10 enclose a second front cavity 72, the speaker 40 and the substrate 10 enclose a rear cavity 80, and the first front cavity 71, the second front cavity 72 and the rear cavity 80 together form an acoustic structure of the earmuff.

Specifically, be equipped with constant head tank 60 on the base plate 10, speaker 40 back-off is on constant head tank 60, speaker 40 with constant head tank 60 encloses to close and forms second front chamber 72, specifically, speaker 40 back-off is 60 and is glued sealedly on the constant head tank.

Referring to fig. 5 to fig. 7, the frequency response curves and distortion curves of the ear muffs in the above embodiments are shown, the frequency range during human speech is about 300 Hz and 700Hz, and it is obvious from the figures that the resonance peak of the ear muff is captured between the frequency ranges of the human speech, and the vocal vibration signals can be effectively picked up.

In summary, in the ear muff of the above embodiments of the present invention, the bone conduction microphone 31 is disposed in the ear pad 30, when the ear muff is worn, the bone conduction microphone 31 is attached to the ear of the human body via the ear pad 30, the bone conduction microphone 31 is attached to the inner ear bone beside the ear of the human body, the bone conduction microphone 31 sufficiently picks up the vibration signal generated by the vibration of the skull bone when the user speaks, converts the vibration signal into an electrical signal, and outputs the electrical signal via the communication device, thereby realizing the function of microphone, because air is not required as a sound transmission medium, the sound output with higher definition can still be realized in a strong noise environment, the positioning plate 33 is disposed at one end of the bone conduction microphone 31, the size of the positioning plate 33 is larger than that of the bone conduction microphone 31, when the ear muff is used, the positioning plate 33 is attached to the ear of the human body, so as to effectively expand the vibration signal generated by the bone conduction microphone, the transmission effect of the bone conduction transmitter 31 is further improved, and the problem that in the prior art, the earphone is poor in anti-noise performance in the using process, so that the conversation is not clear is solved.

The earmuff proposed in the second embodiment of the present invention is substantially the same as the earmuff proposed in the first embodiment of the present invention, except that, referring to fig. 8, the positioning plate 33 includes a limiting portion 331 and a fixing portion 332 extending outward from the limiting portion 331, the limiting portion 331 is used for connecting with one side of the ear pad 30 close to the ear of the human body, and the fixing portion 332 is used for wrapping the bone conduction microphone 31; specifically, the position-limiting portion 331 is connected to the ear pad 30 on the side close to the ear of the human body by being embedded in the sound-absorbing cotton 32, and by way of example and not limitation, in the present embodiment, the fixing portion 332 is a hollow cylinder, and the bone conduction microphone 31 is embedded in the hollow cylinder.

It can be understood that, on one hand, the bone conduction microphone 31 is embedded in the fixing portion 332, which can play a good noise insulation role, i.e. the noise can only penetrate through the positioning plate 33 and can only act on the bone conduction microphone 31, which is equivalent to the noise reaches to the bone conduction microphone 31 and is partially attenuated, and on the other hand, because the positioning plate 33 wraps the bone conduction microphone 31, the effective contact area of the bone conduction microphone 31 is increased, the vibration signal picked up by the bone conduction microphone 31 is enlarged, and the acoustic performance of the earmuff is further improved.

In addition, the invention also provides a head bone conduction headset, which comprises a head band and earmuffs respectively arranged at two ends of the head band, wherein the earmuffs are the earmuffs in the embodiments.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides an earmuff, its characterized in that is in including base plate, setting casing and the ear pad of the relative both sides face of base plate, setting are in and fix in the casing speaker on the base plate and inlay in keep away from on the base plate the screen cloth of casing one side, the earmuff is still including setting up bone conduction microphone in the ear pad, the one end of bone conduction microphone outwards extends the spacer, just the size of spacer is greater than the size of bone conduction microphone, bone conduction microphone passes through the spacer with the ear pad is close to human one side of ear and is connected, the output of bone conduction microphone is connected with communication equipment's input.

2. The earmuff of claim 1, wherein the shell has an output terminal on one side, the output terminal is disposed through the shell, and the bone conduction microphone is electrically connected to the output terminal via a wire.

3. The earmuff of claim 2, wherein the ear pad has a through hole formed therein, and the wire is electrically connected to the output terminal through the through hole passing through the ear pad.

4. The earmuff of claim 1, wherein a cavity is formed in the ear cushion, and sound absorbing cotton is filled in the cavity, and the spacer is connected to the ear cushion by embedding the sound absorbing cotton.

5. The earmuff of claim 1, wherein the splines are oval-shaped.

6. The earmuff of claim 1, wherein the bone-conduction microphone is attached to the cheekbones of the human ear in front of the tragus when the earmuff is worn on the human ear.

7. The earmuff of claim 1, wherein the spacer comprises a limiting portion and a fixing portion extending outward from the limiting portion, the limiting portion is used for connecting with the earmuff on a side close to the ear of the human body, and the fixing portion is used for wrapping the bone conduction microphone.

8. The earmuff of claim 1, wherein the base plate encloses the mesh to form a first front chamber, the speaker encloses the base plate to form a second front chamber, and the base plate encloses the shell to form a rear chamber.

9. The earmuff of claim 1, wherein the base plate has a detent, the speaker is flipped over the detent, and the speaker and the detent enclose the second front cavity.

10. A head bone conduction headset comprising a headband, earmuffs respectively provided at both ends of the headband, wherein the earmuffs are the earmuffs according to any one of claims 1 to 9.