CN109379675A - A kind of loudspeaker enclosure divider - Google Patents
A kind of loudspeaker enclosure divider Download PDFInfo
- Publication number
- CN109379675A CN109379675A CN201811380900.8A CN201811380900A CN109379675A CN 109379675 A CN109379675 A CN 109379675A CN 201811380900 A CN201811380900 A CN 201811380900A CN 109379675 A CN109379675 A CN 109379675A
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- audio output
- inductance
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- 239000003990 capacitor Substances 0.000 claims abstract description 72
- 125000003396 thiol group Chemical class [H]S* 0.000 claims abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 description 22
- 230000005611 electricity Effects 0.000 description 13
- 238000005192 partition Methods 0.000 description 12
- 230000004044 response Effects 0.000 description 11
- 230000002889 sympathetic effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 241001503991 Consolida Species 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 210000004556 brain Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000363409 Schultzea beta Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
A kind of loudspeaker enclosure divider, it is characterized by: being equipped at least two voltage circuits, the voltage circuit B of the voltage circuit A and a connection audio output unit B of i.e. one connection audio output unit A, include inductance L, capacitor C5, capacitor C6, capacitor C7 and capacitor C8, the thiol of the inductance L draws connection joint, forms inductance L1；It connects after the signal output end of the audio output unit A is in parallel with capacitor C7 with capacitor C5, forms series circuit A, the inductance L1 and capacitor C6 series connection, form series circuit B, the series circuit A and series circuit B parallel connection, form voltage circuit A；The signal output end of the capacitor C8 and audio output unit B is in parallel, connects again with inductance L later, forms voltage circuit B.Compared with prior art, the present invention has many advantages, such as that frequency is wider, and precision is higher.
Description
Technical field
The present invention relates to a kind of loudspeaker enclosure dividers.
Background technique
Loudspeaker enclosure divider is to distinguish the voice signal of different frequency range, gives position respectively, be then delivered to corresponding band
Loudspeaker in reset again.Frequency divider is " brain " in speaker, most important to the quality of sound quality.The sound of power amplifier output
Music News number has to pass through in frequency divider and crosses filter element processing, and the signal of each unit specific frequency is allowed to pass through.It wants science, close
Reason, the frequency divider for scrupulously designing speaker, could effectively modify the different characteristics of loudspeaker unit, optimum organization, so that respectively
Unit is maximized favourable factors and minimized unfavourable ones, and plays respective due characteristic incisively and vividly, makes that the frequency response of each frequency range is smoothened, acoustical phase is quasi-
Really, the effect that the music that just high, medium and low sound can be made to play back is well arranged, performance is comfortable, broad, magnificent.
Therefore, a kind of frequency is wider, and the higher loudspeaker enclosure divider of precision is suggested.
Summary of the invention
The object of the present invention is to provide a kind of frequency is wider, precision is higher, and full range storehouse has used the higher speaker of precision
Frequency divider.
The invention discloses a kind of loudspeaker enclosure dividers, it is characterised in that: is equipped at least two voltage circuits, i.e., one connection
The formation voltage circuit A of audio output unit A (9) and one connection audio output unit B (3) formed voltage circuit B, include
The thiol extraction connection joint of inductance L, capacitor C5, capacitor C6, capacitor C7 and capacitor C8, the inductance L, form inductance
L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series electrical
Road A, the inductance L1 and capacitor C6 series connection form series circuit B, the series circuit A and series circuit B parallel connection, form electricity
Push back road A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form electricity
Push back road B.
In actual use: it is defeated that audio output unit A (9) and audio output unit B (3) being connected to corresponding signal
Outlet is realized input two-way output all the way, is managed by voltage circuit A and voltage circuit B to sound, by different letters
Number it is output to corresponding unit.Audio output unit A (9) is high pitch output unit, and audio output unit B (3) is bass output
Unit.
As an improvement, being additionally provided with voltage circuit C, the voltage circuit C includes capacitor C9's and audio output unit D (16)
The signal output end of signal output end, the capacitor C9 and audio output unit D (16) are in parallel, connect later with the inductance L,
Form voltage circuit C.
In actual work: audio output unit A (9), audio output unit B (3) and audio output unit D (16) are respectively
Voice unit, middle bass unit and bass unit.Respectively with corresponded on frequency divider output end connection, i.e. three tunnels output be separately connected
On audio output unit A (9), audio output unit B (3) and audio output unit D (16), returned by voltage circuit A, voltage
The control of road B and voltage circuit C to sound, may be implemented better acoustic expression.
Advantage of the invention: being equipped with inductance L, and there are two connection joints by inductance L, intercept from the thiol of inductance L
A connection joint out, making inductance L tool, there are three connection joint, wiring of the connection joint that middle part intercepts out to wherein one end
Connector forms inductance L1, and the voltage circuit A and voltage circuit B that above-mentioned frequency divider is included, the connection joint of the one end inductance L is in
The connection joint that portion intercepts out is located in voltage circuit A, the connection joint of the connection joint of the one end inductance L to the inductance L other end
It is located in voltage circuit B.
A kind of speaker, including cabinet (8), it is characterised in that: be equipped with partition B (14) in cabinet (8), the partition B (14)
Cabinet (8) inner cavity is divided into two chambers up and down, is equipped with partition A (1) in the chamber of lower part, i.e. cabinet (8) inner cavity is by partition A
(1) and partition B (14) is divided into the bass chamber (2) and bass diffusion chamber (11) of the full range chamber (7) on top, lower part, the full range
Audio output unit A (9) are equipped in chamber (7), are equipped with audio output unit B (3) in the bass chamber (2), the audio output
The loudspeaking mouth of unit B (3) is located at bass diffusion chamber (11) end, and the bass chamber (2) is located at bass diffusion chamber (11) rear portion, described
Bass diffusion chamber (11) positive cabinet (8) is equipped with phase-reversing tube (13) and voice guide hole (15), the phase-reversing tube (13) and bass
Chamber (2) connection, voice guide hole (15) are connected to bass diffusion chamber (11).
In actual work: the guiding bugle of audio output unit B (3) spreads sound to bass diffusion chamber (11), and leads to
It crosses bass diffusion chamber (11) positive voice guide hole (15) to be diffused into space, audio output unit B (3) is oriented to the sound at bugle rear
Sound is diffused into space after being compressed in bass chamber (2) by phase-reversing tube (13), by bass diffusion chamber (11) diffusion
Bass and the bass of phase-reversing tube (13) diffusion can reach strong and powerful after being mixed in the sky, and bass does not trail, and power
Amount sense is full.
The design is more preferable for the expression of subwoofer and bass, and bass lower limit is higher than under the bass and sympathetic response of general speaker
Limit.
Bass chamber (2) interior bass is empathized, and the bass after sympathetic response is released from phase-reversing tube (13), bass diffusion chamber
(11) interior bass is empathized, and is released by voice guide hole (15), the sound after two-way sympathetic response, is converged in front of cabinet (8), is added
The performance of strong bass.
Common cabinet only has reversed single-chamber sympathetic response, handles without sympathetic response, and bass expresses plumpness macroscopic view dynamic efficiency pole
It is low.The reversed sympathetic response of audio output unit B and positive sympathetic response are further strengthened by resonator.Sound after two chamber sympathetic responses
Sound, consistent deliver is collected in front of cabinet, greatly improves the efficiency and dynamic of bass.
As an improvement, being equipped with frequency divider (4), the frequency divider (4) is equipped at least two voltage circuits, i.e., one connection sound
The voltage circuit B of the voltage circuit A of frequency output unit A (9) and connection audio output unit B (3),
Thiol comprising inductance L, capacitor C5, capacitor C6, capacitor C7 and capacitor C8, the inductance L is drawn wiring and is connect
Head forms inductance L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series electrical
Road A,
The inductance L1 and capacitor C6 series connection, forms series circuit B,
The series circuit A and series circuit B are in parallel, form voltage circuit A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form electricity
Push back road B.
As an improvement, being additionally provided with sound intermediate frequency output unit D (16) in the full range chamber (7).
Since audio output unit A (9) and audio output unit D (16) and bass chamber are equipped in full range chamber (7) simultaneously
(2) the audio output unit B (3) that is equipped in, it is therefore desirable to use No. three frequency dividers (4), the frequency divider (4) sets that there are three electricity
Road is pushed back,
Thiol comprising inductance L, capacitor C5, capacitor C6, capacitor C7, capacitor C8 and capacitor C9, the inductance L is drawn
Connection joint forms inductance L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series electrical
Road A,
The inductance L1 and capacitor C6 series connection, forms series circuit B,
The series circuit A and series circuit B are in parallel, form voltage circuit A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form electricity
Road B is pushed back,
The signal output end of the capacitor C9 and audio output unit D (16) are in parallel, connect again with inductance L later, are formed
Voltage circuit C.
As an improvement, the front audio output unit A (9) in full range chamber (7) is equipped with Air Filter A (10).
As an improvement, cabinet (8) material is using wooden.
It is bass unit, audio output list that the audio output unit A (9), which is voice unit, audio output unit B (3),
First C (16) is middle bass unit.
Cabinet senior middle school bass unitary design, the independent compartment processing of bass, cabinet are wooden when high-power Larger Dynamic
Structure physical property is unified to be stablized, while the resonance of all cabinets, and overtone is consistent, solves physical property to the greatest extent to sound
The excessive inconsistent reflection that sound is made.
Cabinet uses the high-quality import plate of 25mm~28mm, and stainless steel horny horse is fixed, and whole wooden structure eliminates biography
Components are reduced to minimum to the structure destruction of wooden cabinet, using present maximum power by system speaker metal or plastic handles
High audio output unit B, good plate, firm structure, the unit of high-precision high-power and the frequency divider researched and developed alone,
Substantially reduce the usage quantity of speaker, sound is stablized, uniformly embodied in bandwidth, has accomplished high-efficient, and speaker quantity makes
With few, bass and full range are easy to unified balanced management, thus reduce a series of power amplifier wire rods to peripheral equipment usage quantity
With complicated connectivity problem.
The usage quantity for reducing speaker, provides the accurate expression of sound, has accomplished high-efficient, and speaker quantity is low using few
Sound and full range sound are unified, and high efficiency reduces speaker usage quantity, to reduce a series of power amplifier wire rods to peripheral equipment
Usage quantity and complicated connectivity problem.
When large size performance construction, increase the quantity of speaker with the increase in place, difficult low efficiency of constructing, tuning is even more to be difficult to
Equilibrium is unified, even if professional tuning personnel have used the sound console of profession to carry out tuning, can not also adapt to its needs sometimes.
In addition, unique bass chamber can effectively prevent bass and scatter and disappear rapidly, gain in strength sense, improves the accurate table of sound
It reaches, bass chamber is to be diffused after being compressed the reversed sound of audio output unit B by paraphase hole.It is above-mentioned unique low
Sound chamber refers to that the bugle direction of audio output unit B is directed towards bass diffusion chamber, i.e. the positive sound of audio output unit B passes through
Bass diffusion chamber is expanded by bass diffusion chamber and extraneous connectivity part to external diffusion, and with paraphase hole after carrying out compression and sympathetic response
The acoustical phase to shed is consistent, and converges holding diffusion in the same direction.
Loudspeaker enclosure divider is to distinguish the voice signal of different frequency range, gives position respectively, be then delivered to corresponding band
Loudspeaker in reset again.Frequency divider is " brain " in speaker, most important to the quality of sound quality.The sound of power amplifier output
Music News number has to pass through in frequency divider and crosses filter element processing, and the signal of each unit specific frequency is allowed to pass through.It wants science, close
Reason, the frequency divider for scrupulously designing speaker, could effectively modify the different characteristics of loudspeaker unit, optimum organization, so that respectively
Unit is maximized favourable factors and minimized unfavourable ones, and plays respective due characteristic incisively and vividly, makes that the frequency response of each frequency range is smoothened, acoustical phase is quasi-
Really, the effect that the music that just high, medium and low sound can be made to play back is well arranged, performance is comfortable, broad, magnificent.
Compared with prior art, the present invention has frequency wider, and precision is higher, and full range storehouse has used precision more high excellent
Point.
Detailed description of the invention
Fig. 1 is divider circuit structural schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of embodiment 2.
Fig. 3 is the structural schematic diagram of embodiment 3.
As shown in the figure: 1 is partition A, and 2 be bass chamber, and 3 be audio output unit B, and 4 be frequency divider, and 5 be positive circuit, 6
It is negative loop, 7 be full range chamber, and 8 be cabinet, and 9 be audio output unit A, and 10 be Air Filter A, and 11 be bass diffusion chamber, and 12 are
Acoustical cotton, 13 be phase-reversing tube, and 14 be partition B, and 15 be voice guide hole, and 16 be audio output unit D, and C5, C6, C7, C8, C9 are electricity
Hold, L is inductance coil, and L1 is to draw the terminal connect on inductance coil L to be formed by a part.
Specific embodiment
Embodiment 1: being the structural scheme of mechanism of the embodiment of the present invention 1 referring to Fig.1, the present embodiment 1 discloses a kind of speaker point
Frequency device, it is characterised in that: be equipped at least two voltage circuits, i.e., the formation voltage circuit of one connection audio output unit A (9)
The voltage circuit B that A and connection audio output unit B (3) is formed includes inductance L, capacitor C5, capacitor C6, capacitor C7 and electricity
Hold C8, the thiol of the inductance L draws connection joint, forms inductance L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series electrical
Road A, the inductance L1 and capacitor C6 series connection form series circuit B, the series circuit A and series circuit B parallel connection, form electricity
Push back road A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form electricity
Push back road B.
In actual use: it is defeated that audio output unit A (9) and audio output unit B (3) being connected to corresponding signal
Outlet is realized input two-way output all the way, is managed by voltage circuit A and voltage circuit B to sound, by different letters
Number it is output to corresponding unit.Audio output unit A (9) is high pitch output unit, and audio output unit B (3) is bass output
Unit.
Embodiment 2: being the structural schematic diagram of the embodiment of the present invention 2, compared with Example 1, the present embodiment referring to Fig. 2
The difference is that: it is additionally provided with voltage circuit C, the voltage circuit C includes the signal of capacitor C9 and audio output unit D (16)
The signal output end of output end, the capacitor C9 and audio output unit D (16) are in parallel, connect later with the inductance L, are formed
Voltage circuit C.
In actual work: audio output unit A (9), audio output unit B (3) and audio output unit D (16) are respectively
Voice unit, middle bass unit and bass unit.Respectively with corresponded on frequency divider output end connection, i.e. three tunnels output be separately connected
On audio output unit A (9), audio output unit B (3) and audio output unit D (16), returned by voltage circuit A, voltage
The control of road B and voltage circuit C to sound, may be implemented better acoustic expression.
Embodiment 3: being the structural schematic diagram of the embodiment of the present invention 3 referring to Fig. 3, present embodiment discloses a kind of speaker, packets
Include cabinet (8), it is characterised in that: be equipped with partition B (14) in cabinet (8), cabinet (8) inner cavity is divided by the partition B (14)
Upper and lower two chambers, the chamber of lower part is interior to be equipped with partition A (1), i.e. cabinet (8) inner cavity is divided by partition A (1) and partition B (14)
The full range chamber (7) on top, the bass chamber (2) of lower part and bass diffusion chamber (11), the full range chamber (7) is interior to be equipped with audio output list
First A (9), the bass chamber (2) is interior to be equipped with audio output unit B (3), and the loudspeaking mouth of the audio output unit B (3) is located at low
Sound diffusion chamber (11) end, the bass chamber (2) are located at bass diffusion chamber (11) rear portion, the positive case of the bass diffusion chamber (11)
Body (8) is equipped with phase-reversing tube (13) and voice guide hole (15), and the phase-reversing tube (13) is connected to bass chamber (2), voice guide hole (15) and
Bass diffusion chamber (11) connection.
Equipped with frequency divider, the frequency divider is equipped at least two voltage circuits, i.e., one connection audio output unit A (9)
Formation voltage circuit A and one connection audio output unit B (3) formed voltage circuit B, include inductance L, capacitor C5, electricity
The thiol for holding C6, capacitor C7 and capacitor C8, the inductance L draws connection joint, forms inductance L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series electrical
Road A, the inductance L1 and capacitor C6 series connection form series circuit B, the series circuit A and series circuit B parallel connection, form electricity
Push back road A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form electricity
Push back road B.
In actual use: it is defeated that audio output unit A (9) and audio output unit B (3) being connected to corresponding signal
Outlet is realized input two-way output all the way, is managed by voltage circuit A and voltage circuit B to sound, by different letters
Number it is output to corresponding unit.Audio output unit A (9) is high pitch output unit, and audio output unit B (3) is bass output
Unit.
Alternatively, being additionally provided with audio output unit D (16) in the full range chamber (7), the frequency divider (4), if there are three simultaneously
The voltage circuit of connection,
Thiol comprising inductance L, capacitor C5, capacitor C6, capacitor C7, capacitor C8 and capacitor C9, the inductance L is drawn
Connection joint forms inductance L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series electrical
Road A,
The inductance L1 and capacitor C6 series connection, forms series circuit B,
The series circuit A and series circuit B are in parallel, form voltage circuit A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form electricity
Road B is pushed back,
The signal output end of the capacitor C9 and audio output unit D (16) are in parallel, connect again with inductance L later, are formed
Voltage circuit C.
Claims (3)
1. a kind of loudspeaker enclosure divider, it is characterised in that: be equipped at least two voltage circuits, i.e., one connection audio output unit A
(9) the voltage circuit B that the voltage circuit A formed and connection audio output unit B (3) are formed,
Thiol comprising inductance L, capacitor C5, capacitor C6, capacitor C7 and capacitor C8, the inductance L draws connection joint, shape
At inductance L1；
It connects after the signal output end of the audio output unit A (9) is in parallel with capacitor C7 with capacitor C5, forms series circuit A,
The inductance L1 and capacitor C6 series connection, forms series circuit B,
The series circuit A and series circuit B are in parallel, form voltage circuit A；
The signal output end of the capacitor C8 and audio output unit B (3) are in parallel, connect again with inductance L later, form voltage and return
Road B.
2. loudspeaker enclosure divider as described in claim 1, it is characterised in that: be additionally provided with voltage circuit C, the voltage circuit C packet
The signal of the signal output end of C9 containing capacitor and audio output unit D (16), the capacitor C9 and audio output unit D (16) are defeated
Outlet is in parallel, connects later with the inductance L, forms voltage circuit C.
3. a kind of speaker, it is characterised in that: include loudspeaker enclosure divider as claimed in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811380900.8A CN109379675B (en) | 2018-11-20 | 2018-11-20 | Sound box frequency divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811380900.8A CN109379675B (en) | 2018-11-20 | 2018-11-20 | Sound box frequency divider |
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| Publication Number | Publication Date |
|---|---|
| CN109379675A true CN109379675A (en) | 2019-02-22 |
| CN109379675B CN109379675B (en) | 2024-02-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811380900.8A Active CN109379675B (en) | 2018-11-20 | 2018-11-20 | Sound box frequency divider |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606071A (en) * | 1984-08-13 | 1986-08-12 | White Jr Lahroy A | Loudspeaker system utilizing an equalizer circuit |
| CN204539441U (en) * | 2015-03-23 | 2015-08-05 | 张廷亮 | LC loudspeaker enclosure divider |
| CN206353853U (en) * | 2017-01-22 | 2017-07-25 | 石河子市天艺星光演出设备租赁有限公司 | A kind of audio amplifier |
| CN108429982A (en) * | 2018-04-18 | 2018-08-21 | 郑治龙 | A kind of high response audio frequency dividers |
| CN208940217U (en) * | 2018-11-20 | 2019-06-04 | 石河子市天艺星光演出设备租赁有限公司 | A kind of loudspeaker enclosure divider |
-
2018
- 2018-11-20 CN CN201811380900.8A patent/CN109379675B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606071A (en) * | 1984-08-13 | 1986-08-12 | White Jr Lahroy A | Loudspeaker system utilizing an equalizer circuit |
| CN204539441U (en) * | 2015-03-23 | 2015-08-05 | 张廷亮 | LC loudspeaker enclosure divider |
| CN206353853U (en) * | 2017-01-22 | 2017-07-25 | 石河子市天艺星光演出设备租赁有限公司 | A kind of audio amplifier |
| CN108429982A (en) * | 2018-04-18 | 2018-08-21 | 郑治龙 | A kind of high response audio frequency dividers |
| CN208940217U (en) * | 2018-11-20 | 2019-06-04 | 石河子市天艺星光演出设备租赁有限公司 | A kind of loudspeaker enclosure divider |
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| Publication number | Publication date |
|---|---|
| CN109379675B (en) | 2024-02-27 |
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