CN107623881A - A kind of bluetooth earphone - Google Patents
A kind of bluetooth earphone Download PDFInfo
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- CN107623881A CN107623881A CN201610555584.8A CN201610555584A CN107623881A CN 107623881 A CN107623881 A CN 107623881A CN 201610555584 A CN201610555584 A CN 201610555584A CN 107623881 A CN107623881 A CN 107623881A
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- China
- Prior art keywords
- loudspeaker
- mainboard
- bluetooth earphone
- power
- power supply
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Abstract
The invention discloses a kind of bluetooth earphone, is related to Bluetooth Communication Technology, including：Housing and circuit structure, wherein the housing includes protecgulum and matches somebody with somebody embedding bonnet with the protecgulum；The circuit structure is placed in the protecgulum and the bonnet closes the inner space to be formed；The circuit structure includes mainboard, antenna, power supply, loudspeaker and microphone；The mainboard is electrically connected with the antenna, the loudspeaker and the microphone respectively；The power supply is respectively the mainboard, the antenna, the loudspeaker and the microphone power；Audio frequency processing circuit, clock oscillator, wave filter and termination power are provided with the mainboard.Using above-mentioned technical proposal, due to adding termination power so that signal can be reduced as far as possible in the decay of transmitting procedure, and laser propagation effect is more preferable.
Description
Technical field
The present invention relates to Bluetooth Communication Technology, more particularly to a kind of bluetooth earphone.
Background technology
Bluetooth earphone, it is a kind of wearable device, calls for audition to be happy, when rest, wears
Earphone, the music oneself liked is played, enjoy music and bring the happy of oneself, contacted when by mobile phone
When, answer without holding mobile phone, directly received calls by bluetooth earphone can.And its compact practicality,
More facilities are added for life.
Existing bluetooth earphone generally use audio ic is built, and is realized on the 2.4G transmission channels built
The transmission of audio.Other equipment is communicated with bluetooth earphone by Bluetooth protocol.When other equipment and bluetooth
After earphone establishes connection, other equipment sends audio signal and received to bluetooth earphone, bluetooth earphone by antenna
Electromagnetic wave, and be converted into modulated wave electric current, then detects primary signal from modulated current, finally by raising
The tone currents taken out in detection is converted into acoustic energy by sound device, and people's can mentions the sound of other equipment transmission
Happy or language.Bluetooth earphone can also transmit a signal to other equipment end by operation, realization communicate into
The intelligentized control of row.
But in the prior art, because earphone is less and less, not high speech quality is always a shortcoming.By
In bluetooth earphone volume very little, when wearing, MICROPHONE (microphone) apart from face farther out, can not
Realize the sound for accurately collecting human body releasing, simple consideration increase MICROPHONE quantity and change
MICROPHONE structure size, such issues that can not effectively solve.
Meanwhile in existing product, it is more to be designed using the chip of CSR companies, carrying out ears channel radio
During letter, easily there is phenomena such as left and right disconnects.And because the 2.4G signal frequency ranges of use are public frequency bands,
Easily cause and influenced each other with the signal such as WIFI.And in wearable device, using lithium battery power supply, power supply
It is unstable cause the unstable of signal, easily there is the connection disconnected with this.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of speech quality method for improving and speech quality are good
Bluetooth earphone.
In order to solve the above-mentioned technical problem, the technical scheme is that：
A kind of bluetooth earphone, including：
Housing and circuit structure, wherein the housing includes protecgulum and matches somebody with somebody embedding bonnet with the protecgulum；It is described
Circuit structure is placed in the protecgulum and the bonnet closes the inner space to be formed；The circuit structure includes
Mainboard, antenna, power supply, loudspeaker and microphone；The mainboard respectively with the antenna, the loudspeaker
It is electrically connected with the microphone；The power supply be respectively the mainboard, the antenna, the loudspeaker and
The microphone power；Audio frequency processing circuit, clock oscillator, wave filter and coupling are provided with the mainboard
Close circuit.
Preferably, the circuit structure also includes touching device；The touching device and the power supply and described
Mainboard is electrically connected with；The touching device includes touch pad and soft-touch control；Cover in the rear be provided with it is hidden
Shape Petting Area, by stealthy Petting Area, in the hull outside, i.e. caning be controlled in the enclosure interior is arranged on institute
State the soft-touch control on touch pad.
It is furthermore preferred that the circuit structure also includes bluetooth display lamp, the bluetooth display lamp and the power supply
It is electrically connected with, is covered after described provided with a through hole for housing the bluetooth display lamp with the mainboard.
It is furthermore preferred that waterproof acoustically transparent net is provided with the loudspeaker and the microphone.
Preferably, the power supply includes power panel, battery and the charging inlet being arranged on the power panel；
On the battery installation battery bracket, the battery is fixed on by the battery bracket together with the power panel
The enclosure interior.
Preferably, the loudspeaker include moving iron loud speaker, moving-coil speaker, etc. magnetic speaker, electrostatic raise
One kind in sound device and electret loudspeaker.
Preferably, the audio frequency processing circuit includes one kind in CSR8670, CSR8645 and CSR8675.
Preferably, the antenna includes PIFA antennas.
Using above-mentioned technical proposal, due to adding termination power so that signal can in the decay of transmitting procedure
To reduce as far as possible, laser propagation effect is more preferable.
Brief description of the drawings
Fig. 1 is the structural representation of bluetooth earphone of the present invention；
Fig. 2 is the stereogram of bluetooth earphone of the present invention；
Fig. 3 is the front view of bluetooth earphone of the present invention；
Fig. 4 is the rearview of bluetooth earphone of the present invention；
Fig. 5 is the top view of bluetooth earphone of the present invention；
Fig. 6 is the circuit diagram of the audio frequency processing circuit of the embodiment of the present invention；
Fig. 7 is the circuit diagram of the electric power management circuit of the embodiment of the present invention；And
Fig. 8 is the circuit diagram of the touching device circuit of the embodiment of the present invention.
In figure, 1- housings, 11- protecgulums, 12- bonnets, 121- stealth Petting Areas, 122- through holes, 2- circuits
Structure, 21- mainboards, 22- microphones, 23- earphones, 24- power supplys, 241- power panels, 242- cell apparatus,
243- charging inlets, 244- battery brackets, 25- touching devices, 26- bluetooth display lamps, 27- waterproof acoustically transparent nets,
28- silica gel earplugs.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings.Herein it should be noted that
It is used to help understand the present invention for the explanation of these embodiments, but does not form limitation of the invention.
In addition, as long as technical characteristic involved in each embodiment of invention described below is each other not
Conflict can is formed to be mutually combined.
As the first embodiment of the present invention, a kind of bluetooth earphone, as Figure 1-5, including：Housing 1
With circuit structure 2, wherein housing 1 includes protecgulum 11 and matches somebody with somebody embedding bonnet 12 with protecgulum 11；Circuit structure 2
It is placed in the inner space of protecgulum 11 and the closure formation of bonnet 12；Circuit structure 2 includes mainboard 21, antenna
(not shown), power supply 24, loudspeaker 23 and microphone 22；Mainboard 21 respectively with antenna, raise one's voice
Device 23 and microphone 22 are electrically connected with；Power supply 24 is respectively mainboard 21, antenna, loudspeaker 23 and Mike
Wind 22 is powered；Audio frequency processing circuit, clock oscillator, wave filter and termination power are provided with mainboard 21；
Silica gel earplugs 28 are provided with the position of loudspeaker 23 of upper lid 11.
Wherein, the loudspeaker 23 of the present embodiment selects moving iron loud speaker to realize more preferable call tone quality, certainly
Loudspeaker 23 except from outside moving iron loud speaker can also from moving-coil speaker, etc. magnetic speaker, electrostatic raise
One kind in sound device and electret loudspeaker.
Continue as shown in figure 1, power supply 24 includes power panel 241, battery 242 and is arranged on power panel
Charging inlet 243；In order to which battery 242 preferably can be fixed in housing 1, battery 242 is arranged on
In battery bracket 244, battery 242 is fixed in housing 1 by battery bracket 244 together with power panel 241
Portion.
As shown in fig. 6, audio frequency processing circuit selects the CSR8670 of CSR companies, and certainly, audio frequency process electricity
Road can also select the disposable type of CSR86XX series, but by test, be reached from CSR8670
Effect it is best；Simultaneously in order to further improve speech quality, by inside CSR8670 1.8V power supply and
1.35V power supplies remove, and are powered using external power source, specifically as shown in Figure 6,7：Disconnect J7 and J9
Pin, J8 and J6 are attached with ground wire, and remaining power detecting pin is all connected with external power source.Battery passes through
U5 produces one group of 1.8V power supply and one group of 1.35V power supply, makes CSR8670 normal works；By in removal
Portion's power supply, eliminate CSR8670 internal electric sources module and carry out changing caused clutter so that RF signals
Transmission it is unaffected, substantially reduce disturbed possibility, improve speech quality.
In order to further reduce noise jamming caused by power module, in motherboard design, by power supply with
GND is set in the different numbers of plies, and power unit is separated with RF parts, mutual to reduce it
Influence.
Meanwhile as shown in fig. 6, increasing termination power on BT-RF pins, termination power connects antenna,
Output end connects wave filter, realizes the matching of circuit, to reduce decay of the signal in transmitting procedure, makes PCB
The second harmonic of plate is reduced, and RF emission effciency is improved, to reach best transmission effect.
Antenna selects PIFA antennas, uses PIFA antennas to coordinate with termination power, improves RF emission effciencies,
Signal is preferably sent, meanwhile, bluetooth power output grade is set as class1 grades (8dBm), will be normal
The sensitivity for advising bluetooth improves 20% (- 80dBm to -90dBm).
As shown in Figure 3,4, widest portion is 25.2mm × 19.7mm × 16.3mm to above-mentioned bluetooth earphone size,
Narrowest part is 14.5mm × 19.7mm × 16.3mm；Because size is smaller, microphone apart from face farther out,
The processing for carrying out signal by integrating correlated digital signals processor in CSR8670, as shown in fig. 6, i.e.
It can realize that intelligent identification comes to the voice in each orientation.
Continue the preferred embodiment as shown in figure 1, as first embodiment, the circuit structure 2 of bluetooth earphone
Also include touching device 25；Touching device 25 is electrically connected with power supply 24 and mainboard 21；Touching device 25
Including touch pad 252 and soft-touch control 251；It is overall attractive in appearance in order to ensure, one is provided with bonnet 12
Block stealth Petting Area 121, stealthy Petting Area mainly use one block of glass similar or dark-coloured with the color of housing 1,
Visually reach stealthy effect, housing 1 is can be controlled in outside housing 1 by stealthy Petting Area 121
Inside is arranged on the soft-touch control 251 on touch pad 252.
Wherein, as shown in figure 8, being to use click type due to touching part, so as to produce high level signal,
When high level signal access CSR8670 PIO pins, CSR8670 contact control module is set to realize phase
The function of answering, for example, connect hang up, show electricity and regulation volume etc..
Continue another preferred embodiment as shown in figure 1, as first embodiment, circuit structure 2 also includes
Bluetooth display lamp 26, bluetooth display lamp 26 are electrically connected with mainboard 21, and are powered by power supply 24 for it,
The through hole 122 of an accommodating bluetooth display lamp 26 is provided with bonnet 12, can be by the lamp of bluetooth display lamp 26
Bonnet 12 is stretched out in head point by through hole 122；Bluetooth display lamp is displayed for the electricity feelings of bluetooth earphone
Condition and or the connection of bluetooth earphone and other equipment.
In order to reach the effect of waterproof, as shown in figure 1, being connect in microphone 22 and loudspeaker 23 with extraneous
Waterproof acoustically transparent net 27 is set in contacting surface, and sound can penetrate waterproof acoustically transparent net 27, while steam can't enter
In microphone 22 and loudspeaker 23.
As shown in fig. 7, power protecting circuit is additionally provided with power panel, wherein, R16 is thermistor,
When earphone is charged, U2 heatings, when reaching certain temperature, R16 resistance is 0 ohm, is realized
Circuit turn-on, at this moment NTC pins are low level, and U2 is closed, to realize that the temperature of power supply is protected
Shield.Meanwhile MODE pins are accessed into U1 (i.e. CSR8670), corresponding high level is configured by U1
With low level, realize that U2 passes through is quiescent current, to reach the effect of lifting usage time.
As the another preferred embodiment of first embodiment, that is, realize two ears while listen to music and call,
Implementation method is as follows：The bluetooth earphone of two above-described embodiments is needed, it is main bluetooth earphone to set one,
Bluetooth earphone supplemented by another, main bluetooth earphone is connected with user equipment with auxiliary bluetooth earphone respectively；Connection
After the completion of, user equipment generation two-way audio source signal, main bluetooth earphone is sent to by Bluetooth protocol, it is main
Bluetooth earphone share all the way signal to auxiliary bluetooth earphone.
Bluetooth earphone proposed by the present invention is above described, speech quality lifting proposed by the present invention is described below
Method.
The method of above-mentioned bluetooth earphone lifting speech quality is：
Cancel the in-line power in audio frequency processing circuit, powered using external power source for audio frequency processing circuit；Tool
Body, as shown in fig. 6, cancelling CSR8670 inside 1.8V and 1.35V power supply, by the way of outside
Power supply, J9, J7 are not used, and J8, J6 connect with ground wire.Remaining power detecting pin is all connected with external electrical
Source.By U5, battery is connected, two groups of power supply 1.8V and 1.35V is produced and enables CSR8670 normal works；
Power unit and RF are partially separated in motherboard layout simultaneously；
Setting bluetooth power output is promoted to class1 from class2；Generally the bluetooth of non-commercial equipment is defeated
It is class2 to go out power setting, and maximum communication distance is 10 meters, and class1 communication distance has reached 40-50
Rice, but unstable due to easily causing connection when distance is too big, therefore the present invention is by class1 transmission power
Adjust to 8dBm, now Bluetooth communication distance is 20 meters or so, while more stable in order to connect, in master
When plate designs, power supply is set in the different numbers of plies from GND, power unit is separated with RF parts,
To reduce its reciprocal influence, connective stability is strong, makes stable Bluetooth communication distance on the basis of original
One times of lifting.
As shown in fig. 6, also by increasing termination power in BT-RF pins, the parameter of matching network is adjusted,
Reduce the second harmonic of pcb board so that the characteristic impedance with PIFA antennas matches, and increases RF transmitting
Efficiency.Using outside 1.8V and 1.35V power supply, influence of the power supply to RF is reduced, while is avoided interior
The influence of transmission of the noise to signal caused by portion's power supply so that RF power output increase, bluetooth are sensitive
Degree improves 20%.
And high level signal can be produced because touching device circuit uses click type touch pad, during use, when
When high level signal accesses CSR8670 PIO pins, CSR8670 as shown in Figure 8 touch control can be made
Molding block realizes corresponding function.
For stabilized power source, as shown in fig. 7, power protecting circuit is additionally provided with power panel, wherein,
R16 is thermistor, when earphone is charged, U2 heatings, and when reaching certain temperature, R16 electricity
Hinder for 0 ohm, realize circuit turn-on, at this moment NTC pins are low level, and U2 is closed, with
Realize the temperature protection of power supply.Meanwhile MODE pins are accessed into U1 (i.e. CSR8670), pass through U1
Corresponding high level and low level are configured, realize that U2 passes through is quiescent current, to reach lifting usage time
Effect.
Embodiments of the present invention are explained in detail above in association with accompanying drawing, but the invention is not restricted to described
Embodiment.For a person skilled in the art, the situation of the principle of the invention and spirit is not being departed from
Under, a variety of change, modification, replacement and modification are carried out to these embodiments, still fall within the protection of the present invention
In the range of.
Claims (8)
- A kind of 1. bluetooth earphone, it is characterised in that including：Housing and circuit structure, wherein the housing bag Include protecgulum and match somebody with somebody embedding bonnet with the protecgulum；The circuit structure is placed in the protecgulum and the bonnet closes Close the inner space formed；The circuit structure includes mainboard, antenna, power supply, loudspeaker and microphone； The mainboard is electrically connected with the antenna, the loudspeaker and the microphone respectively；The power supply difference For the mainboard, the antenna, the loudspeaker and the microphone power；Sound is provided with the mainboard Frequency process circuit, clock oscillator, wave filter and termination power.
- 2. bluetooth earphone according to claim 1, it is characterised in that：The circuit structure also includes touching Touch device；The touching device is electrically connected with the power supply and the mainboard；The touching device includes touching Template and soft-touch control；Cover in the rear and be provided with stealthy Petting Area.
- 3. bluetooth earphone according to claim 1 or 2, it is characterised in that：The circuit structure also wraps Bluetooth display lamp is included, the bluetooth display lamp is electrically connected with the power supply and the mainboard, covered after described Provided with a through hole for housing the bluetooth display lamp.
- 4. bluetooth earphone according to claim 1 or 2, it is characterised in that：The loudspeaker and described Waterproof acoustically transparent net is provided with microphone.
- 5. bluetooth earphone according to claim 1, it is characterised in that：The power supply include power panel, Battery and the charging inlet being arranged on the power panel；On the battery installation battery bracket, the battery The battery is fixed on the enclosure interior by support together with the power panel.
- 6. bluetooth earphone according to claim 1, it is characterised in that：The loudspeaker includes dynamic iron and raised Sound device, moving-coil speaker, etc. one kind in magnetic speaker, electrostatic loudspeaker and electret loudspeaker.
- 7. bluetooth earphone according to claim 1, it is characterised in that：The audio frequency processing circuit includes One kind in CSR8670, CSR8645 and CSR8675.
- 8. bluetooth earphone according to claim 1, it is characterised in that：The antenna includes PIFA days Line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610555584.8A CN107623881A (en) | 2016-07-13 | 2016-07-13 | A kind of bluetooth earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610555584.8A CN107623881A (en) | 2016-07-13 | 2016-07-13 | A kind of bluetooth earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107623881A true CN107623881A (en) | 2018-01-23 |
Family
ID=61087651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610555584.8A Pending CN107623881A (en) | 2016-07-13 | 2016-07-13 | A kind of bluetooth earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107623881A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109547885A (en) * | 2018-11-29 | 2019-03-29 | 北京羽扇智信息科技有限公司 | A kind of wireless communication earphone |
| CN113079435A (en) * | 2021-04-07 | 2021-07-06 | 深圳市科潮达科技有限公司 | Earphone set |
| CN113225633A (en) * | 2020-01-21 | 2021-08-06 | 万魔声学股份有限公司 | Earphone set |
| JP7473322B2 (en) | 2019-07-31 | 2024-04-23 | 日月光半導体製造股▲ふん▼有限公司 | Semiconductor device package and acoustic device having same |
-
2016
- 2016-07-13 CN CN201610555584.8A patent/CN107623881A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109547885A (en) * | 2018-11-29 | 2019-03-29 | 北京羽扇智信息科技有限公司 | A kind of wireless communication earphone |
| JP7473322B2 (en) | 2019-07-31 | 2024-04-23 | 日月光半導体製造股▲ふん▼有限公司 | Semiconductor device package and acoustic device having same |
| CN113225633A (en) * | 2020-01-21 | 2021-08-06 | 万魔声学股份有限公司 | Earphone set |
| CN113079435A (en) * | 2021-04-07 | 2021-07-06 | 深圳市科潮达科技有限公司 | Earphone set |
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