CN204145700U - Earphone - Google Patents
Earphone Download PDFInfo
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- CN204145700U CN204145700U CN201420490906.1U CN201420490906U CN204145700U CN 204145700 U CN204145700 U CN 204145700U CN 201420490906 U CN201420490906 U CN 201420490906U CN 204145700 U CN204145700 U CN 204145700U
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Abstract
The utility model discloses a kind of earphone, comprising: the first loudspeaker, one end of the first loudspeaker is connected with first input end; Second loudspeaker, one end of the second loudspeaker is connected with the second input, and the other end of the second loudspeaker is connected with the other end of the first loudspeaker, has node between the first loudspeaker and the second loudspeaker; First electric capacity is to the 4th electric capacity, wherein, when the first electric capacity is in access state to the 4th electric capacity, one end of first electric capacity is connected with first input end, the other end of the first electric capacity is connected with one end of the second electric capacity, and the other end of the second electric capacity is connected with node, and one end of the 3rd electric capacity is connected with the second input, the other end of the 3rd electric capacity is connected with one end of the 4th electric capacity, and the other end of the 4th electric capacity is connected with node; Changeover module, the first electric capacity switches between non-access state and access state to the 4th electric capacity by changeover module; When playing music, this earphone can ensure that high-fidelity is play, and suppress low-and high-frequency noise when playing voice, improves speech quality.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly a kind of earphone.
Background technology
Frequency response range is an important indicator of earphone, the reflection of this index be the frequency bandwidth of earphone, the bandwidth of earphone roughly can be divided into two kinds, i.e. the bandwidth of music pattern and the bandwidth of speech pattern.Wherein, as shown in Figure 1, music pattern requires that the bandwidth of earphone is that 20Hz-20000Hz is even higher, like this playback music of ability high-fidelity and the different sound of natural various height frequency; And the bandwidth of speech pattern wants much narrow, usual speech pattern requires that the bandwidth of earphone is 200Hz-4000Hz.
Table 1
Desirable earphone is in full range pattern when playing music, and namely 20Hz-20000Hz has enough output amplitudes, and will " quoted in broken sentences " when playing voice, all lowers by the gain of below 200HZ and more than 4000HZ in frequency response curve.
Relevant earphone due to earphone itself structure caused by, almost cannot take into account under music pattern and speech pattern can the playback of clear high-fidelity, such as, the broadband of the frequency response range of the earphone of top grade normally music pattern, i.e. 20Hz-20000Hz.But the shortcoming that the high-grade earphone in correlation technique exists is, when playing music, performance better, can the playback music of high-fidelity, but when playing voice, effect is but as one wishes not to the utmost, can produce low-and high-frequency noise.This be due to relevant earphone when playing voice the sound (mainly ambient noise) beyond voice also shuffle out, namely also can fall on the voice signal and add lower than the low frequency roar of 200Hz and to neigh noise higher than the high frequency of 4000Hz, have impact on speech quality, reduce Consumer's Experience.Therefore, there are the needs improved in the earphone in correlation technique.
Summary of the invention
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, the purpose of this utility model is to propose a kind of earphone, and this earphone can ensure the playback music of high-fidelity when playing music, can suppress low-and high-frequency noise when playing voice simultaneously.
According to a kind of earphone that the utility model proposes, comprising: the first loudspeaker, one end of described first loudspeaker is connected with first input end; Second loudspeaker, one end of described second loudspeaker is connected with the second input, and the other end of described second loudspeaker is connected with the other end of described first loudspeaker, has node between described first loudspeaker and the second loudspeaker; First electric capacity is to the 4th electric capacity, wherein, when described first electric capacity is in access state to the 4th electric capacity, one end of described first electric capacity is connected with described first input end, the other end of described first electric capacity is connected with one end of described second electric capacity, the other end of described second electric capacity is connected with described node, one end of described 3rd electric capacity is connected with described second input, the other end of described 3rd electric capacity is connected with one end of described 4th electric capacity, and the other end of described 4th electric capacity is connected with described node; Changeover module, described first electric capacity switches between non-access state and described access state to the 4th electric capacity by described changeover module; First electric capacity is connected on same printing board PCB to the 4th condenser welding, and described printing board PCB is arranged in a miniature shell.
According to the earphone that the utility model proposes, by changeover module, the first electric capacity is switched between non-access state and access state to the 4th electric capacity, the bandwidth of earphone is switched between music pattern and speech pattern, thus the playback music of high-fidelity can be ensured when playing music, and low-and high-frequency noise can be suppressed when playing voice, ensure the definition of voice signal, improve speech quality, promote the experience of user.
Accompanying drawing explanation
Fig. 1 is the structural representation of the earphone according to the utility model embodiment.
Fig. 2 is the frequency response curve schematic diagram of the earphone according to the utility model embodiment.
Fig. 3 and Fig. 4 is the circuit theory diagrams of the earphone according to the utility model specific embodiment.
Fig. 5 is the schematic diagram of miniature shell in the earphone according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
First, the application proposes based on following principle:
From the principle of electric capacity, the electric capacity in circuit, to the inhibition of alternating current (music signal, voice signal can regard as alternating current), is called capacitive reactance.Particularly, can according to the capacitive reactance of following formulae discovery electric capacity:
Xc=1/(2πfc)
Wherein, being capacitive reactance, is angular frequency, and C is capacitance.If the unit of electric capacity is farad F, the unit of frequency is hertz Hz, and so, the unit of capacitive reactance is exactly ohm Ω.
In addition, experiment proves, capacitance is large, and alternating current is more easily by electric capacity, and illustrate that capacitance is large, the inhibition of electric capacity is little; The frequency of alternating current is high, and alternating current is also easily by electric capacity, and illustrate that frequency is high, the inhibition of electric capacity is also little.It can thus be appreciated that capacitive reactance and electric capacity are inversely proportional to, capacitive reactance and frequency are also inversely proportional to, and series capacitance can form high-pass filtering, and shunt capacitance can form low-pass filtering.
Based on above-mentioned principle, the utility model embodiment proposes a kind of earphone.
The earphone proposed according to the utility model embodiment is described with reference to the accompanying drawings.
Fig. 1 is the structural representation of the earphone according to the utility model embodiment.As shown in Figure 1, this earphone comprises the first loudspeaker 1, second loudspeaker 2, first electric capacity C1 to the 4th electric capacity C4 and changeover module 3.
Wherein, one end of the first loudspeaker 1 is connected with first input end 10; One end of second loudspeaker 2 is connected with the second input 20, and the other end of the second loudspeaker 2 is connected with the other end of the first loudspeaker 1, has node a between the first loudspeaker 1 and the second loudspeaker 2; When the first electric capacity C1 to the 4th electric capacity C4 is in access state, one end of first electric capacity C1 is connected with first input end 10, the other end of the first electric capacity C1 is connected with one end of the second electric capacity C2, the other end of the second electric capacity C2 is connected with node a, one end of 3rd electric capacity C3 is connected with the second input 20, the other end of the 3rd electric capacity C3 is connected with one end of the 4th electric capacity C4, and the other end of the 4th electric capacity C4 is connected with node a; First electric capacity C1 switches between non-access state and access state to the 4th electric capacity C4 by changeover module 3.
That is, when the first electric capacity C1 to the 4th electric capacity C4 is switched to non-access state by changeover module 3, earphone is in music pattern, and namely the bandwidth of earphone is 20Hz-20000Hz, now plays music, can ensure the playback music of clear high-fidelity; When the first electric capacity C1 to the 4th electric capacity C4 is switched to access state by changeover module 3, earphone is in speech pattern, namely the bandwidth of earphone is 200Hz-4000Hz, now play voice, low-and high-frequency noise can be suppressed, both without low frequency roar, also without the noise of neighing of high frequency, ensure the definition of voice signal, improve speech quality.Thus, a set of headphones realizes music/speech bimodulus and plays, user is experienced better, more comfortable auditory perception.
Specifically, when the AC signal that utilizes the earphone of the utility model embodiment flows through electric capacity, electric capacity can produce the principle of capacitive reactance to signal, be series at the first electric capacity C1 between the first input end 10 of earphone and the first loudspeaker 1, and the 3rd electric capacity C3 be series between the second input 20 of earphone and the second loudspeaker 2, larger capacitive reactance is presented to the low frequency of the frequency signal flowing through the first loudspeaker 1 and the second loudspeaker 2, form high-pass filtering, low frequency signal (20-200Hz) is attenuated, and the roar in voice signal can be suppressed; Be connected in parallel on the second electric capacity C2 and the 4th electric capacity C4 at the first loudspeaker 1 and the second loudspeaker 2 two ends respectively, high capacitive reactance is presented to low frequency, low capacitive reactance is presented to high frequency, therefore high-frequency signal (higher than 4000HZ) through C2 C4 enter ground, low frequency signals flows through the first loudspeaker 1 and the second loudspeaker 2 form low-pass filtering, high-frequency signal is attenuated, in voice signal fizz can be suppressed.Thus, utilize the first electric capacity C1 to achieve to the 4th electric capacity C4 and changeover module 3 dexterously and realize the double mode conversion of music/speech in a set of headphones.
In other words, when the earphone of the utility model embodiment is used for listening to the music, first electric capacity C1 is switched to non-access state to the 4th electric capacity C4, after flowing through the first loudspeaker 1 and the second loudspeaker 2 from the frequency signal of the first input end 10 of earphone and the input of the second input, frequency signal at high and low frequency without any decay.Electroacoustical measurement is tested, can obtain curve 1 as shown in Figure 2, from curve 1, in music mode, the output amplitude of frequency signal from 20Hz to 20000Hz flowing through the first loudspeaker 1 is balanced.Like this, be conducive to music appreciating, ensure that high-fidelity is play.
When the earphone of the utility model embodiment is used for speech communication, by being connected on the high-pass filtering that the first electric capacity C1 in earphone and the 3rd electric capacity C3 is formed, and the low-pass filtering that the second electric capacity C2 be connected in parallel in earphone and the 4th electric capacity C4 is formed, the frequency signal of 4 electric capacity C1, C2, C3, C4 to input " is quotedd in broken sentences ", significantly reduce the frequency signal that flows through the first loudspeaker 1 and the second loudspeaker 2 output amplitude at high frequency (higher than 4000H) and low frequency (20Hz-200Hz), and then the speech frequency response curve that acquisition one is ideal.Electroacoustical measurement is tested, can obtain curve 2 as shown in Figure 2, from curve 2, the output amplitude of frequency signal is falling lower than 200Hz with higher than obviously decaying during 4000Hz.Like this, be conducive to suppressing low-and high-frequency noise signal, ensure the definition of voice signal, make voice signal clear pure, the thunder sense of hearing of high-frequency noise of the low frequency that absolutely not wideband causes is uncomfortable, greatly improves call sound quality.
According to a specific embodiment of the present utility model, the capacitance of the first electric capacity C1 can be equal with the capacitance of the 3rd electric capacity C3, and the capacitance of the second electric capacity C2 can be equal with the capacitance of the 4th electric capacity C4.The capacitance of the first electric capacity C1 can be greater than the capacitance of the second electric capacity C2, and namely the capacitance of the 3rd electric capacity C3 also can be greater than the capacitance of the 4th electric capacity C4.
According to a concrete example of the present utility model, the capacitance of the first electric capacity C1 and the 3rd electric capacity C3 can be 9.4uF, and the capacitance of the second electric capacity C2 and the 4th electric capacity C4 can be 22uF.
Further, according to a specific embodiment of the present utility model, as shown in Figure 3 and Figure 4, changeover module 3 comprises: the first K switch 1 is to the 4th K switch 4.
Wherein, one end of the first K switch 1 is connected with one end of the first electric capacity C1, and the first contact 11 of the first K switch 1 is connected with the other end of the first electric capacity C1; Second switch K2 is connected between the second electric capacity C2 and node a, and one end of second switch K2 is connected with node a, and first contact 21 of second switch K2 is connected with the other end of the second electric capacity C2; One end of 3rd K switch 3 is connected with one end of the 3rd electric capacity C3, and the first contact 31 of the 3rd K switch 3 is connected with the other end of the 3rd electric capacity C3; 4th K switch 4 is connected between the 4th electric capacity C4 and node a, and one end of the 4th K switch 4 is connected with the other end of the 4th electric capacity C4, and the first contact 41 of the 4th K switch 4 is connected with node a.
Wherein, as shown in Figure 3, when the first electric capacity C1 to the 4th electric capacity C4 is in non-access state, the other end of the first K switch 1 contacts with the first contact 11 of the first K switch 1, the other end of second switch K2 and first contact 21 of second switch K2 disconnect, the other end of the 3rd K switch 3 contacts with the first contact 31 of the 3rd K switch 3, and the other end of the 4th K switch 4 and the first contact 41 of the 4th K switch 4 disconnect; As shown in Figure 4, when the first electric capacity C1 to the 4th electric capacity C4 is at access state, the other end of the first K switch 1 and the first contact 11 of the first K switch 1 disconnect, the other end of second switch K2 contacts with first contact 21 of second switch K2, the other end of the 3rd K switch 3 and the first contact 31 of the 3rd K switch 3 disconnect, and the other end of the 4th K switch 4 contacts with the first contact 41 of the 4th K switch 4.
Further, according to an embodiment of the present utility model, as shown in Figure 3 and Figure 4, first K switch 1 also has the second contact to the 4th K switch 4, wherein, the second contact 12 of the first K switch 1 is connected with one end of the first K switch 1, and second contact 22 of second switch K2 is connected with one end of second switch K2, second contact 32 of the 3rd K switch 3 is connected with one end of the 3rd K switch 3, and the second contact 42 of the 4th K switch 4 is connected with one end of the 4th K switch 4.
Wherein, as shown in Figure 3, when the first electric capacity C1 to the 4th electric capacity C4 is in non-access state, the other end of the first K switch 1 and the second contact 12 of the first K switch 1 disconnect, the other end of second switch K2 contacts with second contact 22 of second switch K2, the other end of the 3rd K switch 3 and the second contact 32 of the 3rd K switch 3 disconnect, and the other end of the 4th K switch 4 contacts with the second contact 42 of the 4th K switch 4; As shown in Figure 4, when the first electric capacity C1 to the 4th electric capacity C4 is at access state, the other end of the first K switch 1 contacts with the second contact 12 of the first K switch 1, the other end of second switch K2 and second contact 22 of second switch K2 disconnect, the other end of the 3rd K switch 3 contacts with the second contact 32 of the 3rd K switch 3, and the other end of the 4th K switch 4 and the second contact 42 of the 4th K switch 4 disconnect.
Describe the earphone of the utility model embodiment in detail for the first loudspeaker 1 referring to Fig. 3 and Fig. 4.
Specifically, when the first K switch 1 is in contact condition as shown in Figure 3 to the 4th K switch 4, first electric capacity C1 of series connection is by the first K switch 1 short circuit, inoperative, second electric capacity C2 is controlled to open a way with second switch K2, also inoperative, frequency signal through first input end 10 to the first K switch 1 flow through the first loudspeaker 1 to " " common port complete full range play, now earphone is in zero-decrement full range state.Thus, the playback music of clear high-fidelity can be ensured when playing music
When the first K switch 1 is in contact condition as shown in Figure 4 to the 4th K switch 4, first electric capacity C1 is connected between first input end 10 and the first loudspeaker 1, second electric capacity C2 is connected in parallel on the two ends of the first loudspeaker 1, frequency signal through first input end 10 to the first electric capacity C1 flow through the first loudspeaker 1 to " " common port completes " quoteing in broken sentences ".Particularly, when frequency signal flows through the first electric capacity C1 via first input end 10, first electric capacity C1 can produce capacitive reactance to frequency signal itself, capacitive reactance and the frequency of electric capacity are inversely proportional to, be inversely proportional to capacity, now, it is a high pass filter that first electric capacity C1 can regard as, namely low frequency is attenuated, high frequency is passed through, wherein, the Frequency point of low cut can be determined by the capacitance of the first electric capacity C1, such as can be 22uF by the capacitance of the first electric capacity C1, frequency signal can be made falling lower than obviously decaying during 200Hz, thus achieve " cutting head " the i.e. object of frequency reducing.Simultaneously, second electric capacity C2 is that the character of high pass filter does not change, but due to C2 be the two ends being connected in parallel on the first loudspeaker 1, high-frequency signal has been bypassed through C2, therefore, the high-frequency signal flow through in the frequency signal of the first loudspeaker 1 is attenuated, and wherein, the Frequency point of high frequency attenuation can be determined by the capacitance of the second electric capacity C2, such as, the capacitance of the second electric capacity C2 can be 9.4uF, frequency signal can being made falling higher than obviously decaying during 4000Hz, achieving the object that namely high frequency falls in " truncating ".Thus, a desirable voice frequency response curve can be obtained, " haystack " curve be commonly called as, thus suppress low-and high-frequency noise signal, ensure the definition of voice signal, the thunder sense of hearing of high-frequency noise of the low frequency that absolutely not wideband causes is uncomfortable, greatly improves call sound quality.
According to a specific embodiment of the present utility model, the first K switch 1 can be interlock toggle switch to the 4th K switch 4.
According to another specific embodiment of the present utility model, first electric capacity C1 to the 4th electric capacity C4 and the first K switch 1 to the 4th K switch 4 can be welded in same printing board PCB (Printed Circuit Board, printed circuit board) on, printing board PCB can be arranged in a miniature shell as shown in Figure 5.Wherein, as shown in Figure 5, toggle switch K can be provided with outside miniature shell.
Specifically, with reference to the circuit theory diagrams shown in Fig. 3 and Fig. 4, electric capacity C1, C2, C3, C4 are welded on pcb board by Fig. 3 or Fig. 4, by figure, above-mentioned pcb board is connected with the first loudspeaker 1 and the second loudspeaker 2 respectively, above-mentioned connection, the PCB that welded are installed in a miniature shell, further, by toggle switch K, the first electric capacity C1 can be switched between non-access state and access state to the 4th electric capacity C4.
In addition, it should be noted that, the earphone of the utility model embodiment can be any Mobile phone earphone, bluetooth earphone, computer headset etc.
To sum up, according to the earphone that the utility model proposes, by changeover module, the first electric capacity is switched between non-access state and access state to the 4th electric capacity, the bandwidth of earphone is switched between music pattern and speech pattern, thus the playback music of high-fidelity can be ensured when playing music, and low-and high-frequency noise can be suppressed when playing voice, ensure the definition of voice signal, improve speech quality, promote the experience of user.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (8)
1. an earphone, is characterized in that, comprising:
First loudspeaker, one end of described first loudspeaker is connected with first input end;
Second loudspeaker, one end of described second loudspeaker is connected with the second input, and the other end of described second loudspeaker is connected with the other end of described first loudspeaker, has node between described first loudspeaker and the second loudspeaker;
First electric capacity is to the 4th electric capacity, wherein, when described first electric capacity is in access state to the 4th electric capacity, one end of described first electric capacity is connected with described first input end, the other end of described first electric capacity is connected with one end of described second electric capacity, the other end of described second electric capacity is connected with described node, one end of described 3rd electric capacity is connected with described second input, the other end of described 3rd electric capacity is connected with one end of described 4th electric capacity, and the other end of described 4th electric capacity is connected with described node; And
Changeover module, described first electric capacity switches between non-access state and described access state to the 4th electric capacity by described changeover module;
Described first electric capacity is connected on same printing board PCB to the 4th condenser welding, and described printing board PCB is arranged in a miniature shell.
2. earphone as claimed in claim 1, it is characterized in that, the capacitance of described first electric capacity is equal with the capacitance of described 3rd electric capacity, and the capacitance of described second electric capacity is equal with the capacitance of described 4th electric capacity.
3. earphone as claimed in claim 2, it is characterized in that, the capacitance of described first electric capacity is greater than the capacitance of described second electric capacity.
4. earphone as claimed in claim 1, it is characterized in that, described changeover module comprises: the first switch to the 4th switch, wherein,
One end of described first switch is connected with one end of described first electric capacity, and the first contact of described first switch is connected with the other end of described first electric capacity;
Described second switch is connected between described second electric capacity and described node, and one end of described second switch is connected with described node, and the first contact of described second switch is connected with the other end of described second electric capacity;
One end of described 3rd switch is connected with one end of described 3rd electric capacity, and the first contact of described 3rd switch is connected with the other end of described 3rd electric capacity;
Described 4th switch is connected between described 4th electric capacity and described node, and one end of described 4th switch is connected with the other end of described 4th electric capacity, and the first contact of described 4th switch is connected with described node.
5. earphone as claimed in claim 4, is characterized in that, wherein,
When described first electric capacity to the 4th electric capacity in described non-access state time, the other end of described first switch and the first contact of described first switch, the other end of described second switch and the first contact of described second switch disconnect, the other end of described 3rd switch and the first contact of described 3rd switch, the other end of described 4th switch and the first contact of described 4th switch disconnect;
When described first electric capacity to the 4th electric capacity at described access state time, the other end of described first switch and the first contact of described first switch disconnect, the other end of described second switch and the first contact of described second switch, the other end of described 3rd switch and the first contact of described 3rd switch disconnect, the other end of described 4th switch and the first contact of described 4th switch.
6. earphone as claimed in claim 4, is characterized in that, wherein,
Described first switch also has the second contact to the 4th switch, wherein, second contact of described first switch is connected with one end of described first switch, second contact of described second switch is connected with one end of described second switch, second contact of described 3rd switch is connected with one end of described 3rd switch, and the second contact of described 4th switch is connected with one end of described 4th switch.
7. earphone as claimed in claim 6, is characterized in that, wherein,
When described first electric capacity to the 4th electric capacity in described non-access state time, the other end of described first switch and the second contact of described first switch disconnect, the other end of described second switch and the second contact of described second switch, the other end of described 3rd switch and the second contact of described 3rd switch disconnect, the other end of described 4th switch and the second contact of described 4th switch;
When described first electric capacity to the 4th electric capacity at described access state time, the other end of described first switch and the second contact of described first switch, the other end of described second switch and the second contact of described second switch disconnect, the other end of described 3rd switch and the second contact of described 3rd switch, the other end of described 4th switch and the second contact of described 4th switch disconnect.
8. earphone as claimed in claim 6, is characterized in that, wherein, described first switch to the 4th switch is interlock toggle switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420490906.1U CN204145700U (en) | 2014-08-28 | 2014-08-28 | Earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420490906.1U CN204145700U (en) | 2014-08-28 | 2014-08-28 | Earphone |
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| Publication Number | Publication Date |
|---|---|
| CN204145700U true CN204145700U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420490906.1U Expired - Fee Related CN204145700U (en) | 2014-08-28 | 2014-08-28 | Earphone |
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| CN (1) | CN204145700U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106488350A (en) * | 2015-08-27 | 2017-03-08 | 比亚迪股份有限公司 | Earphone |
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2014
- 2014-08-28 CN CN201420490906.1U patent/CN204145700U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106488350A (en) * | 2015-08-27 | 2017-03-08 | 比亚迪股份有限公司 | Earphone |
| CN106488350B (en) * | 2015-08-27 | 2019-11-22 | 比亚迪股份有限公司 | Earphone |
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