CN205195928U - Headphone - Google Patents
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- CN205195928U CN205195928U CN201521058834.4U CN201521058834U CN205195928U CN 205195928 U CN205195928 U CN 205195928U CN 201521058834 U CN201521058834 U CN 201521058834U CN 205195928 U CN205195928 U CN 205195928U
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- piezoelectric element
- vibrating device
- headphone
- housing
- connecting elements
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Abstract
The utility model provides a headphone, which comprises a housin, the bottom surface middle position of casing is equipped with the rectangle opening, be equipped with vibrating device in the casing, vibrating device includes piezoelectric element, vibrating device is in with the setting the osteoacusis component in the rectangle opening outside is connected, vibrating device's side through the connecting elements with the rectangle open -ended terminal surface of casing is connected, the acoustic impedance of connecting elements is less than the acoustic impedance of casing. The utility model relates to a headphone has small -size lightly to leak the less advantage of sound.
Description
Technical field
The utility model relates to electroacoustic field, particularly relates to a kind of headphone that can reduce leakage sound.
Background technology
The headphone of bone-conduction is the vibration produced by vibrating device is sent to inner ear cochlea (being also referred to as membranous cochlea) via people's bone, makes the auditory nerve be suspended in lymph liquid recognize the audio frequency that record acoustical signal.
The electromagnet solenoid that vibrating device as bone-conduction headphone generally adopts permanent magnet and is made up of voice coil loudspeaker voice coil.The headphone of this spline structure is because need many parts, so structure is very complicated and often have constant weight.In addition, also there is a problem in it, namely power consumption is very large.So, change into now and adopt the piezo-activator assembled by piezoelectric element to be used as vibrating device.Employing piezoelectric element of the prior art as the bone-conduction headphone of vibrating device structural representation as shown in Figure 1, described headphone 1 comprises housing 10, vibrating device 30 is provided with in described housing 10, the supporting member 34 that described vibrating device 30 comprises piezoelectric element 32 and is connected with described piezoelectric element 32, also be provided with osteoacusis component 20 outside described housing 10, the vibration that described piezoelectric element 32 produces can be passed on by described osteoacusis component 20.
There is following problem in above-mentioned headphone, because the vibration that described piezoelectric element 32 produces also can be communicated to housing 10, so housing 10 also produces vibration, once vibrational energy is very large, will produces leak sound from housing 10.
Utility model content
In order to solve problems of the prior art, the utility model proposes a kind of small portable, and leak the less headphone of sound.
To achieve these goals, the utility model proposes a kind of headphone, comprise housing, the bottom surface middle position of described housing is provided with rectangular aperture, be provided with vibrating device in described housing, described vibrating device comprises piezoelectric element, and described vibrating device is connected with the osteoacusis component be arranged on outside described rectangular aperture, the side of described vibrating device is connected through the end face of connecting elements with the rectangular aperture of described housing, and the acoustic impedance of described connecting elements is less than the acoustic impedance of described housing.
Preferably, the acoustic impedance of described connecting elements is less than 0.7 times of the acoustic impedance of described housing.
Preferably, described vibrating device comprises piezoelectric element and supporting member, the upper surface of wherein said supporting member is connected to the center of described piezoelectric element, the lower surface of described supporting member is connected with the osteoacusis component be arranged on outside described rectangular aperture, the side of described supporting member is connected through the end face of connecting elements with the rectangular aperture of described housing, described piezoelectric element passes through support member support, and with the center of described support member support for fulcrum carries out curvilinear motion thus produce vibrating.
Preferably, described vibrating device comprises the 3rd piezoelectric element and vibrating body, the center of wherein said vibrating body is supported by the upper end of described 3rd piezoelectric element, the lower surface of described 3rd piezoelectric element is connected with the osteoacusis component be arranged on outside described rectangular aperture, the side of described 3rd piezoelectric element is connected through the end face of connecting elements with the rectangular aperture of described housing, described vibrating body produces vibration by the 3rd piezoelectric element, and its direction of vibration is the normal direction of the contact-making surface of described 3rd piezoelectric element and osteoacusis component.
The beneficial effect of the program of the present utility model is that above-mentioned headphone has small portable, and leaks the less advantage of sound.
Accompanying drawing explanation
Fig. 1 shows the structural representation of headphone of the prior art.
Fig. 2 shows the structural representation of the first embodiment of the headphone involved by the utility model.
Fig. 3 shows the oscillating curve schematic diagram of the vibrating device in the first embodiment.
Fig. 4 shows the functional block diagram of the control part involved by the utility model.
Fig. 5 shows the leakage sound situation curve chart of headphone.
Fig. 6 shows the structural representation of the second embodiment of the headphone involved by the utility model.
Fig. 7 shows the oscillating curve schematic diagram of the vibrating device in the second embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
As shown in Figure 2, headphone 1 involved by the utility model is one and passes on the unit equipment of sound by osteoacusis, it comprises housing 10, the bottom surface middle position of described housing 10 is provided with rectangular aperture 10a, vibrating device 30 is provided with in described housing 10, described vibrating device 30 comprises piezoelectric element 32 and supporting member 34, the upper surface of wherein said supporting member 34 is connected to the center of described piezoelectric element 32, the lower surface of described supporting member 34 is connected with the osteoacusis component 20 be arranged on outside described rectangular aperture 10a, the side of described supporting member 34 is connected through the end face of connecting elements 22 with the rectangular aperture 10a of described housing 10.
Described housing 10 adopts the material such as metal, resin (comprising synthetic resin) to make, and formation has certain thickness square box-like, and the length (horizontal direction in Fig. 2) of described housing 10 is about 25mm, and highly (longitudinal direction in Fig. 2) is about 3mm.Certainly, the shape side of the being not limited to shape body of described housing 10.In the present embodiment, the thermoplastics that described housing 10 have employed containing Merlon is made.The acoustic impedance of Merlon is here 2.68 × 10
-6kg/m
2.
The vibration passing that described vibrating device 30 can produce by described osteoacusis component 20 is to bone.Described osteoacusis component 20 can be adopted and be made of resin, and its shape can be rectangular shape.
The end face of the side of described supporting member 34 with the rectangular aperture 10a of described housing 10 is connected by described connecting elements 22, to make described housing 10 can vibrate along the longitudinal direction of Fig. 2.What the connecting elements 22 in the present embodiment adopted is silicon system sticker.The acoustic impedance of the silicon system sticker adopted here is 1.25 ~ 1.5 × 10
-6kg/m
2.Therefore the acoustic impedance of described connecting elements 22 less than the acoustic impedance of housing 10 (45 ~ 55%), because sound wave has incident wave and reflected wave in communication process, when sound wave is through different media, contact-making surface can be formed between two kinds of media, when the difference of the acoustic impedance density of two kinds of media is larger, the reflected wave of sound wave is larger, through sound wave less, so the vibration that described vibrating device 30 produces is compared and is difficult to be passed in housing 10 by described connecting elements 22.In other words namely, the leakage sound that described housing 10 produces can reduce a lot.
The material of described connecting elements 22 is not limited to silicon system sticker, as long as select the acoustic impedance of material less than the acoustic impedance of housing 10.The acoustic impedance of the connecting elements 22 involved by the utility model preferably controls less than 0.7 times of the acoustic impedance at housing 10, to make the more of leakage sound minimizing.
Described vibrating device 30 is the devices for applying vibration to described osteoacusis component 20, and it comprises piezoelectric element 32 and supporting member 34.Described piezoelectric element 32 is supported by supporting member 34, and the center supported with it is carried out curvilinear motion for fulcrum thus produced vibration.In the present embodiment, described piezoelectric element 32 adopts bimorph type piezoelectric element.Such as: length (horizontal direction in Fig. 2) is about 23mm, width (the interior dark direction in Fig. 2) is about 3mm, thickness (longitudinal direction in Fig. 2) is about two piezoelectric element 32a and 32b of 0.4mm, between two piezoelectric elements, the upper surface of the first piezoelectric element 32a and the lower surface of the second piezoelectric element 32b be equipped with electrode (not shown), and by lamination, two piezoelectric element 32a and 32b formed piezoelectric elements 32.Described piezoelectric element 32a and 32b can adopt the potteries such as lead zirconate titanate (PZT) to form, and described electrode can adopt copper, zinc, tin, nickel, silver, gold, and the metals such as aluminium are formed.
Piezoelectric element 32 involved by the utility model is not limited to bimorph cell, also can adopt single piezoelectric chip element of a piezoelectric element and a sheet metal laminating.
Described supporting member 34 can adopt solid rectangles, and the lower surface of described supporting member 34 and the upper surface of described osteoacusis component 20 fix, and the upper surface of described supporting member 34 is connected with the center of described piezoelectric element 32.Described supporting member 34 is for supporting described piezoelectric element 32, and when applying drive singal to piezoelectric element 32, described piezoelectric element 32 is understood with the centre of support place of described supporting member 34 for fulcrum carries out curvilinear motion thus produce vibrating, as shown in Figure 3.Thus, the vibration of described piezoelectric element 32 can be sent to bone by supporting member 34 and osteoacusis component 20.
In order to apply drive singal to described piezoelectric element 32, the voltage of external equipment directly can be applied to described piezoelectric element 32 by the headphone involved by the utility model.In addition, can also arrange control part 40 in described housing 10, to apply drive singal for described piezoelectric element 32, the functional block diagram of concrete control part 40 as shown in Figure 4.Control part 40 is made up of handling part 42, D/A converter 44 and amplifier 46.Wherein handling part 42 is for receiving input signal and processing this signal, input signal is herein digital signal, and the process that described handling part 42 carries out comprises: the Δ Σ modulation, Modulation and Amplitude Modulation (AM modulation), frequency modulation(FM) (FM modulation) etc. of repairing tonequality, the compression minimum and maximum difference of volume (strong and weak method), correction quantization noise.Input signal is after treatment sent to D/A converter 44, and D/A converter 44 changes the signal received from handling part 42 (digital signal) into analog signal.Analog signal afterwards after conversion is sent to amplifier 46.The signal received from D/A converter 44 (analog signal) is increased amplitude by amplifier 46.And the signal after amplification is sent to piezoelectric element 32 as drive singal.Piezoelectric element 32 receives drive singal from control part 40 and is driven, thus produces vibration.
Fig. 5 shows the leakage sound situation curve chart of headphone.Concrete display be the leakage sound situation comparison diagram of headphone of the prior art and the headphone involved by the utility model.Apart from the acoustic pressure in the about 5cm place of described housing 10 under this map analysis different frequency.Represent the headphone of the application in Fig. 5 with solid line, be represented by dotted lines headphone of the prior art.As can be seen from Figure 5, to leak sound towards periphery more for the larger expression of sound press.
As can be seen from Figure 5, the headphone under prior art is approximately, before and after 2kHz He before and after 7kHz, more leakage sound to occur.But the mankind are easier to identify for the acoustic pressure of 2 ~ 8kHz, therefore headphone of the prior art also exists the problem of Lou sound.The connecting elements 22 of the headphone involved by the utility model can suppress to housing 10 transmitting vibrations, thus makes the leakage change of tune of 2 ~ 8kHz few.For below 1kHz, the leakage sound of earphone of the prior art and the earphone involved by the utility model does not have too big difference.
Fig. 6 shows the structural representation of the second embodiment of the headphone involved by the utility model.Manner of execution and above-described embodiment of piezoelectric element are in the present embodiment different.The structure of described housing 10, osteoacusis component 20 and connecting elements 22 is the same with above-described embodiment, saves detailed description herein.The first vibrating device 50 in the present embodiment is devices osteoacusis component 20 being applied to vibration, and it comprises the 3rd piezoelectric element 52 and vibrating body 54.The lower surface of described 3rd piezoelectric element 52 is connected with osteoacusis component 20, can stretch by the above-below direction shown in Fig. 6.Shape about the 3rd piezoelectric element 52 can adopt square or cuboid.Described vibrating body 54 adopts tabular component, the center is supported by the upper end of described 3rd piezoelectric element 52, described vibrating body 54 can adopt the moderate material of the elastic force such as metal, resin to make, its length (horizontal direction in Fig. 6) is about 23mm, width (the interior dark direction in Fig. 6) is about 3mm, and thickness (longitudinal direction in Fig. 6) is about 0.4mm.Described 3rd piezoelectric element 52 flexible can cause vibrating body 54 to bend vibration, and its direction of vibration is the normal direction of the contact-making surface of described 3rd piezoelectric element 52 and osteoacusis component 20, as shown in Figure 7.The flexural vibrations of described vibrating body 54 can be delivered to bone by the 3rd piezoelectric element 52 and osteoacusis component 20.
Headphone involved by the utility model has small portable, and leaks the less advantage of sound.
Claims (4)
1. a headphone, it is characterized in that: comprise housing, the bottom surface middle position of described housing is provided with rectangular aperture, vibrating device is provided with in described housing, described vibrating device comprises piezoelectric element, described vibrating device is connected with the osteoacusis component be arranged on outside described rectangular aperture, and the side of described vibrating device is connected through the end face of connecting elements with the rectangular aperture of described housing, and the acoustic impedance of described connecting elements is less than the acoustic impedance of described housing.
2. headphone according to claim 1, is characterized in that: the acoustic impedance of described connecting elements is less than 0.7 times of the acoustic impedance of described housing.
3. headphone according to claim 1 and 2, it is characterized in that: described vibrating device comprises piezoelectric element and supporting member, the upper surface of wherein said supporting member is connected to the center of described piezoelectric element, the lower surface of described supporting member is connected with the osteoacusis component be arranged on outside described rectangular aperture, the side of described supporting member is connected through the end face of connecting elements with the rectangular aperture of described housing, described piezoelectric element passes through support member support, and with the center of described support member support for fulcrum carries out curvilinear motion thus produce vibrating.
4. headphone according to claim 1 and 2, it is characterized in that: described vibrating device comprises the 3rd piezoelectric element and vibrating body, the center of wherein said vibrating body is supported by the upper end of described 3rd piezoelectric element, the lower surface of described 3rd piezoelectric element is connected with the osteoacusis component be arranged on outside described rectangular aperture, the side of described 3rd piezoelectric element is connected through the end face of connecting elements with the rectangular aperture of described housing, described vibrating body produces vibration by the 3rd piezoelectric element, its direction of vibration is the normal direction of the contact-making surface of described 3rd piezoelectric element and osteoacusis component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521058834.4U CN205195928U (en) | 2015-12-18 | 2015-12-18 | Headphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521058834.4U CN205195928U (en) | 2015-12-18 | 2015-12-18 | Headphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195928U true CN205195928U (en) | 2016-04-27 |
Family
ID=55788863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521058834.4U Active CN205195928U (en) | 2015-12-18 | 2015-12-18 | Headphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932923A (en) * | 2017-04-25 | 2017-07-07 | 杭州双弯月电子科技有限公司 | A kind of osteoacusis Bluetooth spectacles |
-
2015
- 2015-12-18 CN CN201521058834.4U patent/CN205195928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932923A (en) * | 2017-04-25 | 2017-07-07 | 杭州双弯月电子科技有限公司 | A kind of osteoacusis Bluetooth spectacles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211122 Address after: 213000 No.39 Xinggang Road, Zhonglou District, Changzhou City, Jiangsu Province Patentee after: Jiangsu wave speed sensor Co.,Ltd. Address before: 264200 No. 70, Dalian Road, gaoqu District, Weihai City, Shandong Province Patentee before: SHANDONG YINUO SAIOU ELECTRONIC TECHNOLOGY Co.,Ltd. |