CN108321029B - Relay with screw thread head - Google Patents
Relay with screw thread head Download PDFInfo
- Publication number
- CN108321029B CN108321029B CN201711489416.4A CN201711489416A CN108321029B CN 108321029 B CN108321029 B CN 108321029B CN 201711489416 A CN201711489416 A CN 201711489416A CN 108321029 B CN108321029 B CN 108321029B
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- terminal
- threaded
- base
- head
- relay
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- 238000000034 method Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
- Electromagnets (AREA)
Abstract
The invention relates to the technical field of relays, and particularly discloses a relay with a threaded head, which comprises a base, a first terminal and a second terminal, wherein the first terminal and the second terminal are arranged on the base; the base is provided with a first terminal, a second terminal, a base and a threaded head, wherein the base is provided with a first terminal and a second terminal, the threaded head is arranged outside the base, the two threaded heads are respectively arranged at the first terminal and the second terminal, the base and the two threaded heads are arranged at intervals, and the threaded heads are provided with threaded holes; the terminal and the external conductor are fixed in a threaded column connection mode, and compared with the prior art of splicing and fixing between the terminal and the external conductor, the connection strength between the terminal and the external conductor is improved; in addition, the interval between screw thread head and the base avoids screw thread head and base contact, in the equipment in-process of screw thread head, avoids leading to screw thread head to warp because of the base conflict screw thread head, promotes the equipment yield of screw thread head.
Description
Technical Field
The invention relates to the technical field of relays, and particularly discloses a relay with a threaded head.
Background
Relays, as "automatic switches" in circuits, have been one of the essential basic elements in many electronic devices; the relay all includes two at least terminals that stretch out the insulator, and during the in-service use, external conductor (external terminal or outer boundary cable etc.) is pegged graft with the terminal one end that stretches out the insulator together, realizes electric conduction, but the connection of pegging graft is insecure, very easily leads to terminal and external conductor to break off, causes the relay to play due effect. In the prior art, one end of the terminal protruding out of the insulating body is directly welded with an external conductor, but the welding mode is adopted to be installed or detached, so that time and labor are wasted, and the terminal is inconvenient to use.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the relay with the threaded head, which realizes the fixation of the terminal and the external conductor in a threaded column connection mode and improves the connection strength between the terminal and the external conductor; the terminal is not required to be welded with an external conductor, so that the installation or the disassembly is convenient; the interval sets up between screw thread head and the base, at the equipment in-process of screw thread head, avoids leading to screw thread head to warp because of the base conflict screw thread head, promotes the equipment yield of screw thread head, and then promotes the manufacturing yield of relay.
In order to achieve the above object, the relay with a screw thread head of the present invention comprises a base, a first terminal and a second terminal which are arranged on the base, wherein one end of the first terminal and one end of the second terminal are protruded into the base, and the other end of the first terminal and the other end of the second terminal are protruded out of the base; the base is provided with a first terminal, a second terminal, a base seat, a second terminal, a threaded hole and two threaded heads, wherein the two threaded heads are arranged outside the base seat, the two threaded heads are respectively arranged on the first terminal and the second terminal, the base seat and the two threaded heads are arranged at intervals, and the threaded heads are provided with threaded holes.
Preferably, the relay includes two fixing posts for fixing the two screw heads to the first terminal and the second terminal, respectively.
Preferably, the screw thread head is provided with a blind accommodating groove for accommodating the first terminal or the second terminal, the blind accommodating groove is concavely formed from the bottom surface of the screw thread head, and the screw hole is concavely formed from the top surface of the screw thread head.
Preferably, the thread head is provided with two limiting blocks protruding into the accommodating blind groove, the threaded hole is positioned between the two limiting blocks, and the two limiting blocks are arranged in parallel; the first terminal and the second terminal are respectively provided with two limiting arms which are accommodated in the accommodating blind groove, the two limiting arms are spaced and arranged in parallel, the two limiting blocks are respectively positioned between the two limiting arms, and one sides of the two limiting blocks, which are far away from each other, are respectively used for abutting one sides of the two limiting arms, which are close to each other.
Preferably, the first terminal and the second terminal are respectively provided with two propping parts, the two propping parts are respectively protruded from one sides of the two limiting arms, which are close to each other, and the top surfaces of the two propping parts are respectively used for abutting against the bottom surfaces of the two limiting blocks.
Preferably, the relay comprises two threaded columns which are respectively in threaded connection with the two threaded holes, and the threaded columns are provided with pressing cap parts matched with the threaded heads.
Preferably, the fixed column penetrates through the threaded head and the first terminal or the fixed column penetrates through the threaded head and the second terminal, the first terminal and the second terminal are respectively provided with a through hole for accommodating the fixed column, a gap between the two limiting arms is communicated with the through holes, and the width of the gap between the two limiting arms, which is close to one end of the through holes, is smaller than the aperture of the through holes.
Preferably, the threaded hole is communicated with the accommodating blind groove, and the first terminal and the second terminal are respectively provided with a blocking surface coplanar with the bottom surface of the threaded hole.
Preferably, the base is provided with a reference surface, the reference surface is a plane, the other end of the first terminal and the other end of the second terminal protrude out of the reference surface, the two thread heads are arranged in parallel with the reference surface, and the thread heads are arranged at intervals with the reference surface.
Preferably, the relay further comprises an electromagnet, a yoke, a movable spring and an armature, wherein the electromagnet, the yoke, the movable spring and the armature are positioned in the base, one end of the yoke is in contact conduction with one end of an iron core of the electromagnet, one end of the movable spring is arranged at the other end of the yoke, the armature is arranged on the movable spring, the electromagnet is used for attracting the armature, the armature is used for contacting and conducting the other end of the yoke and the other end of the iron core of the electromagnet, the first terminal and the yoke are in an integrated structure, and the other end of the movable spring is used for conducting or disconnecting one end of the second terminal protruding into the base.
The invention has the beneficial effects that: the terminal and the external conductor are fixed in a threaded connection mode between the external threaded column and the threaded head, and compared with the plugging fixation between the terminal and the external conductor in the prior art, the connection strength between the terminal and the external conductor is improved; in addition, the interval between screw thread head and the base avoids screw thread head and base contact, in the equipment in-process of screw thread head, avoids leading to screw thread head to warp because of the base conflict screw thread head, promotes the equipment yield of screw thread head.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic diagram of an exploded construction of the present invention;
fig. 3 is a schematic perspective view of the first terminal, the second terminal, the screw head and the yoke according to the present invention;
FIG. 4 is a schematic perspective view of a thread start according to the present invention;
fig. 5 is a schematic perspective view of a second terminal according to the present invention.
The reference numerals include:
1-base 2-first terminal 3-second terminal
4-thread head 5-threaded hole 6-fixed column
7-accommodating blind groove 8-limiting block 9-limiting arm
11-top holding part 12-screw column 13-cap pressing part
14-perforations 15-blocking surfaces 16-datum surfaces
17-electromagnet 18-yoke 19-movable reed
21-armature.
Detailed Description
The present invention will be further described with reference to examples and drawings, which are not intended to be limiting, for the understanding of those skilled in the art.
Referring to fig. 1 and 2, the relay with a screw head of the present invention includes a base 1, a first terminal 2 and a second terminal 3 mounted on the base 1, wherein the base 1 is made of insulating plastic, the first terminal 2 and the second terminal 3 are output ends of the relay, one end of the first terminal 2 and one end of the second terminal 3 protrude into the base 1, and the other end of the first terminal 2 and the other end of the second terminal 3 protrude out of the base 1; the two screw heads 4 are arranged outside the base 1, and the two screw heads 4 are respectively arranged on the first terminal 2 and the second terminal 3, preferably, the screw heads 4 are detachably connected with the first terminal 2 or the second terminal 3, when the screw heads 4 or the terminals are damaged, the screw heads 4 or the terminals are convenient to disassemble, assemble and maintain, and compared with the structure design of integrating the terminals and the screw heads 4, the complexity of process processing is reduced, and the manufacturing cost is further reduced; the base 1 and the two screw heads 4 are arranged at intervals, namely, a gap is reserved between the base 1 and the screw heads 4, the base 1 is prevented from being contacted with the screw heads 4, the screw heads 4 are provided with threaded holes 5, and the threaded holes 5 are used for accommodating external screw columns 12.
When the terminal is actually used, the external thread column 12 is screwed in the threaded hole 5, the external conductor is pressed on the thread head 4 by the thread column 12, and the terminal and the external conductor are fixed in a threaded connection mode between the thread column 12 and the thread head 4; in addition, interval between screw thread head 4 and the base 1 avoids screw thread head 4 and the contact of base 1, in the equipment in-process of screw thread head 4, avoids leading to screw thread head 4 to take place to warp because of base 1 conflict screw thread head 4, promotes the equipment yield of screw thread head 4, and then promotes the equipment yield of relay.
The relay further comprises two fixing columns 6, wherein the two fixing columns 6 are used for respectively fixing the two threaded heads 4 on one end of the first terminal 2 protruding out of the base 1 and one end of the second terminal 3 protruding out of the base 1; when the screw thread head 4 is damaged or bruise, the fixed column 6 is pulled out, the old screw thread head 4 is removed, the new screw thread head 4 is replaced, the relay can be reused, the whole relay is not required to be replaced, and the maintenance and use cost of the relay is reduced.
The screw thread head 4 is provided with a blind accommodating groove 7 for accommodating the first terminal 2 or the second terminal 3, the blind accommodating groove 7 is concavely formed from the bottom surface of the screw thread head 4, and the screw hole 5 is concavely formed from the top surface of the screw thread head 4. During actual assembly, the thread head 4 is sleeved on the outer side of the terminal, so that the terminal is inserted into the accommodating blind groove 7 of the thread head 4 until the free end of the terminal is abutted against the bottom surface of the accommodating blind groove 7, the thread head 4 is ensured to be quickly and accurately installed at the correct position on the terminal, and the assembly efficiency of the relay is improved.
Referring to fig. 1 to 4, the screw head 4 is provided with two limiting blocks 8 protruding into the accommodating blind groove 7, the threaded hole 5 is located between the two limiting blocks 8, and the two limiting blocks 8 are spaced apart from each other and are arranged in parallel; the first terminal 2 and the second terminal 3 are respectively provided with two limiting arms 9 which are accommodated in the accommodating blind groove 7, the two limiting arms 9 are spaced apart from each other and are arranged in parallel, the two limiting blocks 8 are respectively positioned between the two limiting arms 9, and one sides, away from each other, of the two limiting blocks 8 are respectively used for abutting against one sides, close to each other, of the two limiting arms 9. After the thread head 4 is sleeved on the terminal, the limiting arm 9 is used for blocking the limiting block 8, and the terminal is used for blocking the inner wall of the accommodating blind groove 7, so that the thread head 4 is prevented from moving back and forth along the horizontal direction.
Referring to fig. 1 to 5, the first terminal 2 and the second terminal 3 are respectively provided with two propping portions 11, the two propping portions 11 are respectively protruded from one sides of the two limiting arms 9, which are close to each other, and top surfaces of the two propping portions 11 are respectively used for abutting against bottom surfaces of the two limiting blocks 8. After the screw thread head 4 is sleeved on the terminal, the top holding part 11 is utilized to prop against the limiting block 8, so that the screw thread head 4 is prevented from moving back and forth along the vertical direction.
The relay further comprises two threaded columns 12, the two threaded columns 12 are respectively screwed into the two threaded holes 5, and the threaded columns 12 are provided with a pressing cap portion 13 matched with the threaded head 4. When in actual use, the external conductor is placed on the threaded head 4, the threaded head 4 is screwed into the threaded hole 5, the external conductor is pressed on the threaded head 4 by the pressing cap 13, and the external conductor is clamped by the pressing cap 13 and the threaded head 4, so that the external conductor is conducted with the terminal through the threaded head 4.
The fixed column 6 runs through the threaded head 4 and the first terminal 2 or the fixed column 6 runs through the threaded head 4 and the second terminal 3, and during actual manufacturing, the fixed column 6 can be a rivet, the threaded head 4 and the terminal are riveted together by the fixed column 6, the first terminal 2 and the second terminal 3 are all provided with through holes 14 for accommodating the fixed column 6, the gap between the two limiting arms 9 is communicated with the through holes 14, and the width of the gap between the two limiting arms 9, which is close to one end of the through holes 14, is smaller than the aperture of the through holes 14. Compared with the gap between the two limiting arms 9 which is not communicated with the through holes 14, the fixing column 6 is prevented from breaking the terminal in the process that the fixing column 6 penetrates through the terminal; compared with the gap between the two limiting arms 9, the width of the end, close to the through hole 14, is larger than the aperture of the through hole 14, so that the fixing column 6 is prevented from falling out through the gap between the two limiting arms 9.
The threaded holes 5 are communicated with the accommodating blind grooves 7, the threaded holes 5 are blind holes, namely the threaded holes 5 do not penetrate through the threaded heads 4, the first terminals 2 and the second terminals 3 are provided with blocking surfaces 15 coplanar with the bottom surfaces of the threaded holes 5, namely the first terminals 2 are provided with blocking surfaces 15 coplanar with the bottom surfaces of the threaded holes 5 of one threaded head 4, and the second terminals 3 are provided with blocking surfaces 15 coplanar with the bottom surfaces of the threaded holes 5 of the other threaded head 4. After the threaded column 12 is screwed into the threaded hole 5, the blocking surface 15 is used for blocking the head of the threaded column 12, so that the distance between the two limiting arms 9 is prevented from being increased due to the fact that the threaded column 12 is excessively screwed between the two limiting arms 9, and further the phenomenon that the two limiting arms 9 cannot normally clamp the threaded head 4 is avoided.
Referring to fig. 1 and 2, the base 1 is provided with a reference surface 16, the reference surface 16 is a plane, in this embodiment, the reference surface 16 is a top surface of the base 1, the other end of the first terminal 2 and the other end of the second terminal 3 protrude out of the reference surface 16, two screw heads 4 are all arranged parallel to the reference surface 16, preferably, a connecting line between the two screw heads 4 is arranged parallel to the reference surface 16, that is, the two screw heads 4 are located at the same height above the reference surface 16, and the screw heads 4 are arranged at intervals with the reference surface 16, that is, the screw heads 4 are not contacted with the reference surface 16, so that deformation of the screw heads 4 caused by collision of the reference surface 16 with the screw heads 4 is avoided in the assembly process of the screw heads 4. Compared with the first terminal 2 and the second terminal 3 which respectively protrude out of two different side surfaces on the base 1, the assembly between the screw thread head 4 and the terminals is convenient, and the manufacturing efficiency of the relay is improved.
The relay further comprises an electromagnet 17, a yoke 18, a movable spring 19 and an armature 21 which are positioned in the base 1, the yoke 18 is approximately L-shaped, one end of the yoke 18 is in contact conduction with one end of an iron core of the electromagnet 17, the movable spring 19 is also L-shaped, one end of the movable spring 19 is arranged on the other end of the yoke 18, the armature 21 is arranged on the movable spring 19, the electromagnet 17 is used for attracting the armature 21, the armature 21 is used for contacting and conducting the other end of the yoke 18 and the other end of the iron core of the electromagnet 17, the first terminal 2 and the yoke 18 are integrally constructed, and the other end of the movable spring 19 is used for conducting or disconnecting one end of the second terminal 3 protruding into the base 1.
When the electromagnet 17 is electrified, the iron core of the electromagnet 17 generates magnetism, the iron core of the electromagnet 17 attracts the armature 21 to enable the armature 21 to move towards the direction close to the iron core of the electromagnet 17 until the other end of the yoke 18 is conducted by the armature 21 and the other end of the iron core of the electromagnet 17 are moved, the movable spring 19 is driven to move together when the armature 21 moves, the movable spring 19 after movement is elastically deformed, after the movable spring 19 moves, the other end of the movable spring 19 can conduct one end of the second terminal 3 protruding into the base 1, and as one end of the movable spring 19 is connected and conducted with the other end of the yoke 18, the conduction between the first terminal 2 and the second terminal 3 is realized; when the electromagnet 17 is powered off, the iron core of the electromagnet 17 loses magnetism and does not attract the armature 21 any more, the movable spring 19 is reset together with the armature 21 under the action of self elastic force, so that the other end of the movable spring 19 is disconnected with the second terminal 3, and disconnection between the first terminal 2 and the second terminal 3 is further realized.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.
Claims (7)
1. A relay with a screw thread head comprises a base, a first terminal and a second terminal, wherein the first terminal and the second terminal are arranged on the base; the method is characterized in that: the base is provided with a first terminal, a second terminal, a base and a threaded head, wherein the base is provided with a first terminal and a second terminal, the threaded head is arranged outside the base, the two threaded heads are respectively arranged at the first terminal and the second terminal, the base and the two threaded heads are arranged at intervals, and the threaded heads are provided with threaded holes;
the screw thread head is provided with a blind accommodating groove for accommodating the first terminal or the second terminal, the blind accommodating groove is concavely formed from the bottom surface of the screw thread head, and the screw hole is concavely formed from the top surface of the screw thread head;
the thread head is provided with two limiting blocks protruding into the accommodating blind groove, the threaded hole is positioned between the two limiting blocks, and the two limiting blocks are arranged in parallel; the first terminal and the second terminal are respectively provided with two limiting arms which are accommodated in the accommodating blind groove, the two limiting arms are spaced and arranged in parallel, the two limiting blocks are respectively positioned between the two limiting arms, and one sides of the two limiting blocks, which are far away from each other, are respectively used for abutting one sides of the two limiting arms, which are close to each other.
2. The threaded-head relay of claim 1, wherein: the relay comprises two fixing columns, wherein the two fixing columns are used for fixing the two threaded heads to the first terminal and the second terminal respectively; the relay comprises two threaded columns which are respectively connected in two threaded holes in a threaded mode, and the threaded columns are provided with pressing cap parts matched with the threaded heads.
3. The threaded-head relay of claim 1, wherein: the first terminal and the second terminal are respectively provided with two jacking parts, the two jacking parts are respectively formed by protruding from one sides of the two limiting arms, which are close to each other, and the top surfaces of the two jacking parts are respectively used for abutting against the bottom surfaces of the two limiting blocks.
4. A relay with a screw head according to claim 2, characterized in that: the fixed column penetrates through the threaded head and the first terminal or the fixed column penetrates through the threaded head and the second terminal, the first terminal and the second terminal are respectively provided with a through hole for accommodating the fixed column, a gap between the two limiting arms is communicated with the through holes, and the width of the gap between the two limiting arms, which is close to one end of the through holes, is smaller than the aperture of the through holes.
5. The threaded-head relay of claim 1, wherein: the screw hole is communicated with the accommodating blind groove, and the first terminal and the second terminal are both provided with blocking surfaces coplanar with the bottom surface of the screw hole.
6. The threaded-head relay of claim 1, wherein: the base is provided with a reference surface, the reference surface is a plane, the other end of the first terminal and the other end of the second terminal protrude out of the reference surface, the two thread heads are arranged in parallel with the reference surface, and the thread heads are arranged with the reference surface at intervals.
7. The threaded-head relay of claim 1, wherein: the relay further comprises an electromagnet, a yoke, a movable spring and an armature which are positioned in the base, one end of the yoke is in contact conduction with one end of an iron core of the electromagnet, one end of the movable spring is arranged at the other end of the yoke, the armature is arranged on the movable spring, the electromagnet is used for attracting the armature, the armature is used for contacting and conducting the other end of the yoke and the other end of the iron core of the electromagnet, the first terminal and the yoke are in an integrated structure, and the other end of the movable spring is used for conducting or disconnecting one end of the second terminal protruding into the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711489416.4A CN108321029B (en) | 2017-12-30 | 2017-12-30 | Relay with screw thread head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711489416.4A CN108321029B (en) | 2017-12-30 | 2017-12-30 | Relay with screw thread head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108321029A CN108321029A (en) | 2018-07-24 |
| CN108321029B true CN108321029B (en) | 2024-02-20 |
Family
ID=62894216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711489416.4A Active CN108321029B (en) | 2017-12-30 | 2017-12-30 | Relay with screw thread head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108321029B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000123701A (en) * | 1998-10-09 | 2000-04-28 | Fuji Electric Co Ltd | Electromagnetic contactor |
| CN1697105A (en) * | 2004-05-11 | 2005-11-16 | 富士电机机器制御株式会社 | Terminal arrangement of electrical apparatus |
| CN1787149A (en) * | 2004-12-09 | 2006-06-14 | Ls产电株式会社 | Conductor connecting device for electromagnetic contactor |
| CN101807492A (en) * | 2010-03-23 | 2010-08-18 | 乐清市金川电子有限公司 | Large-current relay |
| CN204067233U (en) * | 2014-09-03 | 2014-12-31 | 浙江天正电气股份有限公司 | A kind of terminal cover structure of low-voltage electrical apparatus and A.C. contactor |
| CN207663995U (en) * | 2017-12-30 | 2018-07-27 | 三友联众集团股份有限公司 | A kind of relay being threaded head |
-
2017
- 2017-12-30 CN CN201711489416.4A patent/CN108321029B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000123701A (en) * | 1998-10-09 | 2000-04-28 | Fuji Electric Co Ltd | Electromagnetic contactor |
| CN1697105A (en) * | 2004-05-11 | 2005-11-16 | 富士电机机器制御株式会社 | Terminal arrangement of electrical apparatus |
| CN1787149A (en) * | 2004-12-09 | 2006-06-14 | Ls产电株式会社 | Conductor connecting device for electromagnetic contactor |
| CN101807492A (en) * | 2010-03-23 | 2010-08-18 | 乐清市金川电子有限公司 | Large-current relay |
| CN204067233U (en) * | 2014-09-03 | 2014-12-31 | 浙江天正电气股份有限公司 | A kind of terminal cover structure of low-voltage electrical apparatus and A.C. contactor |
| CN207663995U (en) * | 2017-12-30 | 2018-07-27 | 三友联众集团股份有限公司 | A kind of relay being threaded head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108321029A (en) | 2018-07-24 |
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