CN110400556A - A kind of buzzer structure for facilitating installation to have composite audio - Google Patents
A kind of buzzer structure for facilitating installation to have composite audio Download PDFInfo
- Publication number
- CN110400556A CN110400556A CN201910509214.4A CN201910509214A CN110400556A CN 110400556 A CN110400556 A CN 110400556A CN 201910509214 A CN201910509214 A CN 201910509214A CN 110400556 A CN110400556 A CN 110400556A
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- Prior art keywords
- hole
- buzzer
- composite audio
- facilitating installation
- take
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- 238000009434 installation Methods 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims description 25
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 27
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 230000013011 mating Effects 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a kind of buzzer structures for facilitating installation to have composite audio, including shell, piezo and resonant chamber, the interior of shell is equipped with piezoelectricity singing piece, the piezoelectricity singing piece top is provided with resonant chamber, the outer casing bottom is equipped with outer ring, structure of the invention is scientific and reasonable, it is safe and convenient to use, it is provided with outer ring, pass through sliding slot, groove, the effect of sliding block and fixed block, convenient for according to the actual conditions of installation site, sliding slider, adjust the position of fixed block, the effect of mating connection screw rod and locking nut, its position is fixed, so that buzzer preferably carries out installation fixation, pass through the effect of movable axis, convenient for fixed block is carried out folded concealed according to actual needs, it is easy to operate, install convenient, pass through through-hole, the effect of inner ring and receiving hole, pass through extrusion lug, so that inner ring one The receiving hole of side is overlapped with through-hole, so that buzzer bottom air circulates, improves the heat dissipation effect of buzzer.
Description
Technical field
The present invention relates to buzzer technical field, specially a kind of buzzer structure for facilitating installation to have composite audio.
Background technique
Buzzer is a kind of electronics buzzer of integral structure, using DC-voltage supply, be widely used in computer,
Make acoustical generator in the electronic products such as printer, duplicator, alarm, electronic toy, vehicle electronics, telephone set, timer
Part, wherein the buzzer of composite audio includes piezo buzzer, piezo buzzer mainly by multivibrator, piezo,
The composition such as impedance matching box and resonant tank, shell generates composite audio, existing buzzer structure letter by piezo sounding
Single, shell is integrated fixed, when the mounting hole of fixed pan is due to error, causes not agree with the fixed block of buzzer, make
It obtains buzzer connecting line difficult to install and too long to be exposed to outside, will also result in it and wound with external object, influence device
It works normally, installation is time-consuming and laborious, so it is above-mentioned to solve to be badly in need of a kind of buzzer structure for facilitating installation to have composite audio
Problem.
Summary of the invention
The present invention provides a kind of buzzer structure for facilitating installation to have composite audio, can effectively solve above-mentioned background skill
It is proposed that existing buzzer structure is simple in art, shell is integrated fixed, when the mounting hole of fixed pan is due to error, causes
Do not agree with the fixed block of buzzer so that buzzer is difficult to install, and too long connecting line be exposed to it is outer, will also result in its with
External object is wound, and is influenced device normal work, is installed time-consuming and laborious problem.
To achieve the above object, the invention provides the following technical scheme: a kind of buzzing for facilitating installation to have composite audio
Device structure, including shell, piezo and resonant chamber, the interior of shell are equipped with piezoelectricity singing piece, the piezoelectricity singing piece top
End is provided with resonant chamber, and the outer casing bottom is equipped with outer ring；
The outer ring center position offers sliding slot, the sliding slot inner tip and bottom end open up it is fluted, it is described
Sliding block is installed, described sliding block one end is equipped with fixed block, and the sliding block top is equipped with connecting screw, the company inside sliding slot
It connects screw rod outside screw and is connected with locking nut.
Preferably, the shape of the sliding block is T shape, and the sliding block T shape both ends are caught in two inside grooves.
Preferably, it is connected between the fixed block and sliding block by movable axis, so that fixed block is freely rotated around sliding block.
Preferably, the outer ring bottom end is equipped with take-up component；
The take-up component includes winding box, take-up pulley, shaft, rotating ring, threading hole and rubber pad；
The outer ring bottom end is equipped with winding box, and take-up pulley, the take-up pulley centre bit are equipped with inside the winding box
The place's of setting insertion is equipped with shaft, and the take-up pulley Basolateral is socketed with rotating ring, and the rotating ring is connected with shaft one end, and
It is rotated by rotatable endless belt turn axis, the winding box side offers threading hole, and the threading hole internal sizes are connected to rubber pad.
Preferably, connecting line is wound on the outside of the take-up pulley, described connecting line one end passes through threading hole；
Preferably, the winding box bottom end is equipped with chassis assembly；
The chassis assembly includes chassis, through-hole, convex block, inner ring, receiving hole and connecting spring；
The winding box bottom end is equipped with chassis, and the chassis edge is uniformly provided with through-hole, chassis bottom end edge
Insertion is equipped with convex block, and the convex block top is connected with inner ring, and the inner ring edge is uniformly provided with receiving hole, the inner ring top
End is uniformly equipped with connecting spring.
Preferably, the diameter of the receiving hole is greater than the diameter of through-hole.
Preferably, described connecting spring one end is connected with inner ring top, the connecting spring other end and winding box bottom end
It is connected.
Preferably, the housing top end is equipped with cap assembly；
The cap assembly includes top cover, broadcast hole, L plate and arc block；
The housing top end is equipped with top cover, and broadcast hole, the cap base and broadcast hole are offered at the top of the top cover
Corresponding position is equipped with L plate, and L plate one end is equipped with arc block.
Preferably, the quantity of the broadcast hole and L plate is three, and the width of the L plate is greater than the diameter in broadcast hole.
Compared with prior art, beneficial effects of the present invention: structure of the invention is scientific and reasonable, safe and convenient to use:
1, it is provided with outer ring, by the effect of sliding slot, groove, sliding block and fixed block, convenient for according to the reality of installation site
Situation, thus sliding slider adjust fixed block specific location, the effect of mating connection screw rod and locking nut, by its position into
Row locked and fixed, so that buzzer preferably carries out installation fixation, by the effect of movable axis, convenient for according to actual needs
Fixed block is subjected to folded concealed, easy to operate, it is convenient to install and use.
2, it is provided with take-up component, by the effect of winding box, take-up pulley, shaft, rotating ring and threading hole, convenient for storage
Too long connecting line, the connecting line for making it pull out appropriate length according to actual needs are attached with storage, avoid too long company
Wiring leads to winding or damage outside being exposed to, and influences device normal work, and the effect of compound rubber pad avoids connecting line from pulling
It rubs in the process with threading hole edge, use is more safe and reliable.
3, it is provided with chassis assembly, by the effect of chassis, through-hole, convex block, inner ring and receiving hole, when buzzer is installed
When, by extrusion lug, so that the receiving hole of inner ring side is overlapped with through-hole, so that buzzer bottom and installation position generate sky
Air-flow is logical, to improve the heat dissipation effect of buzzer, extends its service life, the effect of mating connection spring, when device is dismantled
When, receiving hole and through-hole are staggered automatically, so that sundries enters inside receiving hole and through-hole in the mobile transportational process of avoiding device,
Influence the heat dissipation effect of device.
4, it is provided with cap assembly, by the effect in broadcast hole and L plate, resonant chamber is avoided directly to communicate with external environment,
And cooperate the effect of arc block, so that the dust that the external world is entered is blocked in L plate side, the dust-proof effect of device is improved, is avoided
Extraneous dust is accumulated in inside resonant chamber, influences the sound quality of buzzer.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of shell of the present invention；
Fig. 3 is the structural schematic diagram of a-quadrant in Fig. 2 of the present invention；
Fig. 4 is the structural schematic diagram of take-up component of the present invention；
Fig. 5 is the structural schematic diagram of chassis assembly of the present invention；
Fig. 6 is the structural schematic diagram of cap assembly of the present invention；
Figure label: 1, shell；2, piezo；3, resonant chamber；4, outer ring；5, sliding slot；6, groove；7, sliding block；8, fixed
Block；9, movable axis；10, connecting screw；11, locking nut；
12, take-up component；1201, winding box；1202, take-up pulley；1203, shaft；1204, rotating ring；1205, lead to line
Hole；1206, rubber pad；
13, connecting line；
14, chassis assembly；1401, chassis；1402, through-hole；1403, convex block；1404, inner ring；1405, receiving hole；1406,
Connecting spring；
15, cap assembly；1501, top cover；1502, broadcast hole；1503, L plate；1504, arc block.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment: as shown in figures 1 to 6, the present invention provides a kind of technical solution, a kind of to facilitate installation with composite audio
Buzzer structure, including shell 1, piezo 2 and resonant chamber 3 are equipped with piezoelectricity singing piece 2, piezoelectricity singing piece 2 inside shell 1
Top is provided with resonant chamber 3, and 1 bottom of shell is equipped with outer ring 4；
4 center position of outer ring offers sliding slot 5, and 5 inner tip of sliding slot and bottom end open up fluted 6, inside sliding slot 5
Sliding block 7 is installed, 7 one end of sliding block is equipped with fixed block 8, and 7 top of sliding block is equipped with connecting screw 10,10 outside spiral shell of connecting screw
Line is connected with locking nut 11, is fixed on inside sliding slot 5 and is slided convenient for sliding block 7, and the shape of sliding block 7 is T shape, sliding block 7T shape
Both ends are caught in inside two grooves 6, are connected between fixed block 8 and sliding block 7 by movable axis 9, so that fixed block 8 is around sliding block
7 are freely rotated, and realize the folded concealed of fixed block 8 according to demand；
When the device is made operational, buzzer is placed on fixed pan first, according to the mounting hole on fixed pan
Specific location, fluctuate sliding block 7, make it in 5 internal slide of sliding slot, and slide at position corresponding with mounting hole, thus
Fixed block 8 is adjusted to suitable position, locking nut 11 is then rotated, fits closely it with 4 top of outer ring, utilize itself and outer ring
Sliding block 7 is carried out locking work by the frictional force on 4 tops, then by screw by the mounting hole on fixed block 8 and fixed pan into
Row is fixedly connected, wherein by the effect of movable axis 9, extra fixed block 8 is carried out folded concealed, to complete buzzer
Installment work, easy to operate, it is convenient to install and use.
For the ease of improving the heat dissipation effect of device, 1201 bottom end of winding box is equipped with chassis assembly 14, chassis assembly 14
Including chassis 1401, through-hole 1402, convex block 1403, inner ring 1404, receiving hole 1405 and connecting spring 1406,1201 bottom of winding box
End is equipped with chassis 1401, and 1401 edge of chassis is uniformly provided with through-hole 1402, and the insertion of 1401 bottom end edge of chassis is equipped with convex
Block 1403,1403 top of convex block are connected with inner ring 1404, and 1404 edge of inner ring is uniformly provided with receiving hole 1405, and inner ring 1404 is pushed up
End is uniformly equipped with connecting spring 1406, and for the ease of air flowing, the diameter of receiving hole 1405 is greater than the diameter of through-hole 1402,
For the ease of receiving hole 1405 and through-hole 1402 are staggered automatically, 1406 one end of connecting spring is connected with 1404 top of inner ring, even
1406 other end of spring is connect to be connected with 1201 bottom end of winding box；
When device is installed, the convex block 1403 of 1401 bottom end of chassis is contacted with fixed pan, with fixed block 8 and peace
Dress hole is closely connected, so that 1403 stress of convex block moves up, so that inner ring 1404 be driven to move up, and to connect
Spring 1406 compresses, so that the receiving hole 1405 of 1404 side of inner ring is overlapped with through-hole 1402, so that air stream at chassis 1401
It is logical, the heat dissipation effect between chassis 1401 and fixed pan is improved, when device disassembly, 1401 bottom end of chassis and fixed pan point
From then under the action of 1406 elastic force of connecting spring, so that inner ring 1404 moves down, automatically by receiving hole 1405 and through-hole
1402 are staggered, and avoid introduced contaminants in transport moving process from entering inside through-hole 1402 and receiving hole 1405 and result in blockage, influence
The heat dissipation effect of device.
4 bottom end of outer ring is equipped with take-up component 12, and take-up component 12 includes winding box 1201, take-up pulley 1202, shaft
1203, rotating ring 1204, threading hole 1205 and rubber pad 1206,4 bottom end of outer ring are equipped with winding box 1201, in winding box 1201
Portion is equipped with take-up pulley 1202, connecting line 13 is wound on the outside of take-up pulley 1202,13 one end of connecting line passes through threading hole 1205, real
The storage work of existing connecting line 13,1202 center position of take-up pulley, which is embedded in, is equipped with shaft 1203, outside 1202 bottom end of take-up pulley
Side is socketed with rotating ring 1204, and rotating ring 1204 is connected with 1203 one end of shaft, and drives shaft 1203 to revolve by rotating ring 1204
Turn, 1201 side of winding box offers threading hole 1205, in order to avoid rubbing in 13 moving process of connecting line with threading hole 1205
Damage, 1205 internal sizes of threading hole are connected to rubber pad 1206, and too long connecting line 13 is stored convenient for storage；
When device needs to carry out connection circuit, connecting line 13 is connected with external circuitry, then rotates rotating ring 1204,
Shaft 1203 is driven to rotate by rotating ring 1204, shaft 1203 drives take-up pulley 1202 to rotate, and the rotation of take-up pulley 1202 drives
Connecting line 13 is wound, and is hidden so that extraneous too long connecting line 13 is carried out storage, avoids sending out extraneous with other objects
Raw winding causes to wear.
For the ease of improving the dust-proof effect of device, 1 top of shell is equipped with cap assembly 15, and cap assembly 15 includes top
Lid 1501, broadcast hole 1502, L plate 1503 and arc block 1504,1 top of shell are equipped with top cover 1501, open at the top of top cover 1501
Equipped with broadcast hole 1502,1501 bottom of top cover and broadcast 1502 corresponding position of hole are equipped with L plate 1503,1503 one end of L plate peace
Equipped with arc block 1504, device broadcast effect is improved, while further increasing the dust-proof effect of device, broadcast hole 1502 and L plate
1503 quantity is three, and the width of L plate 1503 is greater than the diameter in broadcast hole 1502；
When the device is in use, the sound transmission inside resonant chamber 3 is gone out by broadcast hole 1502, realizes broadcast work,
The gas of external environment, by the effect of L plate 1503, is flowed by broadcast hole 1502 to flowing into inside resonant chamber 3 simultaneously
External air flow carry out baffling, and cooperate the effect of arc block 1504, the dust for being mingled in the gas flow blocked, so that grey
Dirt rests on 1503 side of L plate, avoids it from entering in resonant chamber 3 and is accumulated in piezo 2, influence the sound quality of buzzer, improves
The dust-proof effect of device.
Finally, it should be noted that being not intended to restrict the invention the foregoing is merely preferred embodiment of the invention, to the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of buzzer structure for facilitating installation to have composite audio, including shell (1), piezo (2) and resonant chamber (3),
It is equipped with piezoelectricity singing piece (2) inside the shell (1), piezoelectricity singing piece (2) top is provided with resonant chamber (3), special
Sign is: shell (1) bottom is equipped with outer ring (4)；
Outer ring (4) center position offers sliding slot (5), and sliding slot (5) inner tip and bottom end open up fluted
(6), it is equipped with sliding block (7) inside the sliding slot (5), described sliding block (7) one end is equipped with fixed block (8), sliding block (7) top
End is equipped with connecting screw (10), and connecting screw (10) outside screw is connected with locking nut (11).
2. a kind of buzzer structure for facilitating installation to have composite audio according to claim 1, it is characterised in that: described
The shape of sliding block (7) is T shape, and it is internal that sliding block (7) the T shape both ends are caught in two grooves (6).
3. a kind of buzzer structure for facilitating installation to have composite audio according to claim 1, it is characterised in that: described
It is connected between fixed block (8) and sliding block (7) by movable axis (9), so that fixed block (8) is freely rotated around sliding block (7).
4. a kind of buzzer structure for facilitating installation to have composite audio according to claim 1, it is characterised in that: described
Outer ring (4) bottom end is equipped with take-up component (12)；
The take-up component (12) includes winding box (1201), take-up pulley (1202), shaft (1203), rotating ring (1204), leads to
String holes (1205) and rubber pad (1206)；
Outer ring (4) bottom end is equipped with winding box (1201), is equipped with take-up pulley (1202) inside the winding box (1201),
Take-up pulley (1202) the center position insertion is equipped with shaft (1203), and take-up pulley (1202) Basolateral is socketed with
Rotating ring (1204), the rotating ring (1204) are connected with shaft (1203) one end, and drive shaft by rotating ring (1204)
(1203) it rotates, winding box (1201) side offers threading hole (1205), and threading hole (1205) internal sizes are connected to
Rubber pad (1206).
5. a kind of buzzer structure for facilitating installation to have composite audio according to claim 4, it is characterised in that: described
It is wound with connecting line (13) on the outside of take-up pulley (1202), described connecting line (13) one end passes through threading hole (1205).
6. a kind of buzzer structure for facilitating installation to have composite audio according to claim 4, it is characterised in that: described
Winding box (1201) bottom end is equipped with chassis assembly (14)；
The chassis assembly (14) includes chassis (1401), through-hole (1402), convex block (1403), inner ring (1404), receiving hole
(1405) and connecting spring (1406)；
Winding box (1201) bottom end is equipped with chassis (1401), and chassis (1401) edge is uniformly provided with through-hole
(1402), chassis (1401) the bottom end edge insertion is equipped with convex block (1403), and convex block (1403) top is connected with interior
Ring (1404), inner ring (1404) edge are uniformly provided with receiving hole (1405), and inner ring (1404) top is uniformly installed
There are connecting spring (1406).
7. a kind of buzzer structure for facilitating installation to have composite audio according to claim 6, it is characterised in that: described
The diameter of receiving hole (1405) is greater than the diameter of through-hole (1402).
8. a kind of buzzer structure for facilitating installation to have composite audio according to claim 6, it is characterised in that: described
Connecting spring (1406) one end is connected with inner ring (1404) top, connecting spring (1406) other end and winding box (1201)
Bottom end is connected.
9. a kind of buzzer structure for facilitating installation to have composite audio according to claim 1, it is characterised in that: described
Shell (1) top is equipped with cap assembly (15)；
The cap assembly (15) includes top cover (1501), broadcast hole (1502), L plate (1503) and arc block (1504)；
Shell (1) top is equipped with top cover (1501), and broadcast hole (1502) is offered at the top of the top cover (1501), described
Top cover (1501) bottom and broadcast hole (1502) corresponding position are equipped with L plate (1503), and described L plate (1503) one end is equipped with
Arc block (1504).
10. a kind of buzzer structure for facilitating installation to have composite audio according to claim 9, it is characterised in that: institute
The quantity for stating broadcast hole (1502) and L plate (1503) is three, and the width of the L plate (1503) is greater than broadcast hole (1502)
Diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509214.4A CN110400556B (en) | 2019-06-13 | 2019-06-13 | Buzzer structure convenient to mount and provided with composite audio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509214.4A CN110400556B (en) | 2019-06-13 | 2019-06-13 | Buzzer structure convenient to mount and provided with composite audio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110400556A true CN110400556A (en) | 2019-11-01 |
| CN110400556B CN110400556B (en) | 2021-05-07 |
Family
ID=68324173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910509214.4A Active CN110400556B (en) | 2019-06-13 | 2019-06-13 | Buzzer structure convenient to mount and provided with composite audio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110400556B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179892A (en) * | 2019-12-24 | 2020-05-19 | 汉得利（常州）电子股份有限公司 | High sound pressure level piezoelectric buzzer |
| CN112581926A (en) * | 2020-12-15 | 2021-03-30 | 新沂市承翔电子有限公司 | Electronic buzzer with high protection performance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179892A (en) * | 2019-12-24 | 2020-05-19 | 汉得利（常州）电子股份有限公司 | High sound pressure level piezoelectric buzzer |
| CN111179892B (en) * | 2019-12-24 | 2020-08-14 | 汉得利（常州）电子股份有限公司 | High sound pressure level piezoelectric buzzer |
| CN112581926A (en) * | 2020-12-15 | 2021-03-30 | 新沂市承翔电子有限公司 | Electronic buzzer with high protection performance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110400556B (en) | 2021-05-07 |
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