CN104842558A - 3D printer printing platform - Google Patents
3D printer printing platform Download PDFInfo
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- CN104842558A CN104842558A CN201510192114.5A CN201510192114A CN104842558A CN 104842558 A CN104842558 A CN 104842558A CN 201510192114 A CN201510192114 A CN 201510192114A CN 104842558 A CN104842558 A CN 104842558A
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- shell cavity
- mobile table
- table top
- print platform
- supporting seat
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Abstract
The invention discloses a 3D printer printing platform. The 3D printer printing platform comprises a mobile table surface and a workpiece molding plate arranged on the mobile table surface. Two sides of the mobile table surface are provided with fixing members for fixing the workpiece molding plate. The fixing member comprises a base block for bearing the workpiece molding plate. The base block is provided with a raised part and a notch matching with the raised part of the workpiece molding plate and also is provided with a raised strip of which the lower edge is fastened to the upper surface of the workpiece molding plate so that up-to-down vibration of the workpiece molding plate is inhibited. Adjustment bolts are used for height adjustment. The 3D printer printing platform is convenient for dismounting and mounting, has a high combination precision and is conducive to maintenance and precision adjustment.
Description
Technical field
The present invention relates to 3D printer, especially a kind of 3D printer print platform.
Background technology
3D printer is the printing utensil of physical model the Computerized three-dimensional data transformations that designs a model, current fusion sediment Modeling Technology is the main flow printing technique of 3D printer, flatness and the stability Design direct relation of print platform formed precision, the Workpiece shaping plate of the print platform of existing 3D printer is all adopt the mode be screwed to fix, mainly there is following problem in this fixing means: first, 3D printer screw in the long course of work easily gets loose because of the mobile vibrations of workbench, what finally cause Workpiece shaping plate rocks the Forming Quality greatly affecting product, secondly, if directly operating pickup on Workpiece shaping plate easily damages other devices such as printer port of printer or guide rail after Workpiece shaping, and the Workpiece shaping plate fixing mode that is threaded causes dismounting Workpiece shaping plate extremely to bother, meanwhile, due to the flatness adopting the fixing mode that is threaded cannot regulate each Workpiece shaping plate, cause adjustment difficult in maintenance.
In addition, the universal space hold how reducing printer along with 3D technology realizes folding and unfolding easily and forms trend, but the design of folding and unfolding easily often has influence on stability and the precision of printer all parts, how easy disassembly realizes convenient carrying also is the tomorrow requirement of 3D printer.
Summary of the invention
The present invention aims to provide one and can realize highly regulating, and easy disassembly, is convenient to the 3D printer print platform safeguarding and can ensure formed product precision.
The present invention adopts following scheme: a kind of 3D printer print platform, comprise the mobile table top being arranged at slippage on horizontal moving guide rail, described mobile table top is provided with the Workpiece shaping plate for putting shaping workpiece, described mobile table top both sides are provided with the fixture for fixation workpiece profiled sheeting, described fixture comprises the block that the matrix of support Workpiece shaping plate and matrix lateral are arranged, described block medial surface is extended with raised line, along the top edge being buckled in Workpiece shaping plate respective side portion under described raised line.
Further, described matrix is provided with a protuberance raised up, and described Workpiece shaping plate side has the notch matched with protuberance.
Further, the slide bearings with guide rail cooperating is provided with below described mobile table top, be connected through spring with supporting seat bottom described fixture, also running through between described fixture and supporting seat and have a height adjustment bolt, in the middle part of described supporting seat, being embedded with the nut for matching with height adjustment bolt.
Further, the pressure handle of horizontally set is also extended with outside described block.
Further, the upper level of described matrix medial extremity is higher than matrix outboard end upper surface.
Further, described mobile table top perimembranous is provided with and turns limit to downward-extension, and described supporting seat sidepiece is provided with convex closure, and described mobile table top turns limit and is provided with the slotted eye matched with convex closure.
Further, described Workpiece shaping plate upper surface is higher than protuberance upper surface.
Further, described supporting seat cross section is stepped, described mobile table top turns limit and is buckled in sidepiece above supporting seat terrace, described spring is arranged on supporting seat terrace, described mobile table top is threaded with supporting seat, described height adjustment bolt is arranged in the middle part of protuberance, and described spring is provided with a pair and is arranged at height adjustment bolt both sides.
Further, described print platform is provided with and is arranged at printhead on moving beam and the air cooling equipment supporting with printhead, described printhead is placed on printer slide bar place axial slip with earrings, described air cooling equipment is integrated on printhead, motor-driven line material connecting gear is provided with in described printing head base shell cavity, the axial side of seat shell cavity is provided with the cooling fan of alignment line material connecting gear, the bottom of seat shell cavity is provided with print-head nozzle, and seat shell cavity is provided with the air guide duct towards print-head nozzle;
Described printing head base shell cavity becomes cofferdam, air channel with line material input location-plate, motor outer wall with wall hull shape, a shell cavity top is located at by described line material input location-plate, plate is provided with the locating hole for the input of line material, motor outer wall is relative with cooling fan, seat all the other two sides of shell cavity and bottom are enclosed with a wall shell, the bottom end face of wall shell is provided with air-guiding hole and communicates with air guide duct, and the air-flow that cooling fan is blown into printing head base shell cavity flows out from air guide duct under the restriction in cofferdam, air channel.
Further, described printing head base shell cavity wall place is provided with fan through hole, and described cooling fan is fixed on fan through hole with Easy-dismounting structure
,its top of described air guide duct communicates with printing head base shell cavity, end is downward adjacent with nozzle, its end air outlet points to below nozzle discharge hole, described print-head nozzle upper end is connected with trunnion, trunnion stretches in printing head base shell cavity, and trunnion top is adjacent with line material connecting gear, and end is fixedly connected with nozzle, trunnion tube wall in printing head base shell cavity is connected with radiating block, and described radiating block is with metal material moulding; Described air guide duct quantity is 2, is distributed in trunnion both sides.
The invention has the advantages that:
(1) between the fixture that adopts of the present invention and Workpiece shaping plate, there is the notch that cooperatively interacts and protuberance in the 3D printer course of work, lateral displacement occurs to limit Workpiece shaping plate, utilize the lower edge of raised line to be buckled in Workpiece shaping plate upper surface simultaneously and affect Forming Quality to overcome the vibrations of Workpiece shaping plate generation above-below direction, fixture of the present invention utilizes the characteristic of spring, the dismounting that can realize Workpiece shaping plate of only need tilting laterally is when disassembly is desired very convenient, is beneficial to like this after Workpiece shaping, to take off Workpiece shaping plate carry out pickup operation.
(2) the present invention utilizes supporting of raised line and matrix to realize producing moment to the edge of Workpiece shaping plate towards the face of raising of Workpiece shaping plate end in the design of fixture, further increase the coupling mechanism force of fixture to Workpiece shaping plate, ensure that it vibrations does not occur under the long-play of 3D printer and gets loose;
(3) the present invention compensates because the setting in the face of raising of profiled sheeting end also provides surplus to the long term wear of Workpiece shaping plate sidepiece and raised line, substantially increases the service life of Workpiece shaping plate and fixture.
(4) fixture in the present invention also has the function regulating Workpiece shaping plate height, and what utilize spring and height adjustment bolt coordinates the adjustment that can realize Workpiece shaping plate height to be beneficial to the adjustment of Workpiece shaping plate and to improve degree of regulation thus improve formed product effect;
(5) supporting seat in the present invention by convex closure with the coordinating of slotted eye of mobile table top ensure that the spacing installation being also convenient to mobile table top of mobile table top;
(6) the Workpiece shaping plate upper surface in the present invention higher than protuberance upper surface, can effectively avoid printhead locate or work time and protuberance produce and collide;
(7) printing head base shell cavity wall place of the present invention offers fan through hole, printing head base shell cavity is connected with air guide duct, cooling fan is located at fan through hole and the line material connecting gear of align printhead inside, this structure makes cooling fan, fan through hole, printing head base shell cavity, air guide duct constitutes a complete air channel, cool exterior air is directly blown into printhead cavity by fan, flow through line material connecting gear for after its heat radiation, flow out from air guide duct, efficiency due to active heat removal is higher and fan directly blows line material connecting gear, the printed material at line material connecting gear place is made not easily to occur because of overheated softening or melt,
(8) the fan through hole of printhead is directly located at by the fan in printhead cooling device of the present invention, the cooling blast of blowout is delivered to again the material extruding end of shower nozzle after flowing through cavity by air guide duct, cool to accelerate its solidification condensation to the melted material extruded, only can complete print head body heat radiation and printed material cooling with a fan, such design directly reduces taking up room of fan, taking up room when printhead is worked is minimized, and is conducive to the further lifting of collapsible 3D printer folding degree and portability;
(9) the present invention adopts cooling fan to carry out active heat removal, and wind direction is towards printhead cavity, the blast that fan produces can make the cold air of feeding mineralization pressure inside and outside printing head base shell cavity poor, namely the air pressure in printing head base shell cavity is greater than outside printhead, this makes radiating airflow while flowing out from guide duct, also printing head base shell cavity can be entered with in outside other space communicated, as printed material input hole, nozzle bore etc., effectively improve heat radiation, and the hot-air that its inner and outer air pressure difference also makes nozzle exit fusion sediment material be formed not easily imports in printhead cavity.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing 1 is the 3D printer schematic diagram with structure of the present invention;
Accompanying drawing 2 is A place fixture and Workpiece shaping plate fit structure schematic diagrames in Fig. 1;
Accompanying drawing 3 is fixture matrix constructive embodiment one (being provided with projection) structural representations;
Accompanying drawing 4 is fixture matrix constructive embodiment two (being provided with angle of inclination) structural representations;
Accompanying drawing 5 is that Fig. 1 overlooks view;
Accompanying drawing 6 is fixture and Workpiece shaping plate fit structure schematic diagrames in Fig. 5;
Accompanying drawing 7 is B-B generalized sections in Fig. 5.
Accompanying drawing 8 is front schematic view of printhead of the present invention and cooling device;
Accompanying drawing 9 is front cut-away illustration of printhead of the present invention and cooling device;
Accompanying drawing 10 is schematic three dimensional views of printhead of the present invention and cooling device.
Detailed description of the invention
As shown in Fig. 1 ~ 7, in the present embodiment, Fig. 1 is the diagram that overall 3D printer Workpiece shaping plate 100 completes assembling, and in figure, Workpiece shaping plate 100 is placed in mobile table top 110, and mobile table top 110 axially moves along guide rail 120;
In the present embodiment, be provided with a supporting seat 20 below described mobile table top 110, supporting seat 20 upper surface exceeds mobile table top 110 both sides, and described supporting seat 20 is fixedly connected with mobile table top 110.
In the present embodiment, the through hole 210 for being sheathed on slide rail 120 is provided with in the middle part of described supporting seat 20, described supporting seat 20 cross section is stepped, described mobile table top 110 perimembranous is provided with and turns limit (111 to downward-extension, 112), described supporting seat 20 front side portion or rear lateral portion are provided with convex closure 220, and in face of described travelling carriage, the limit 111 of turning at portion or rear portion is provided with the slotted eye matched with convex closure 220.
The limit 112 of turning of mobile table top 110 sidepiece is buckled in sidepiece above supporting seat terrace, and described mobile table top 110 is threaded with supporting seat 20.
Supporting seat 20 terrace exceedes mobile table top 110 both sides, described for being connected by spring 40 with supporting seat 20 terrace upper surface bottom the fixture 30 of fixation workpiece profiled sheeting 100.
Spring 40 can adopt upper and lower two ends to be fixedly connected with also can arrange the groove holding spring terrace is corresponding with bottom fixture 30, to realize connecting.
In the present embodiment, the fixture 30 being positioned at mobile table top 110 both sides has four, be distributed in the corner location of Workpiece shaping plate 100, fixture 30 comprises the matrix 310 of support Workpiece shaping plate sidepiece, described matrix 310 is provided with a protuberance raised up 311, described Workpiece shaping plate 100 has the notch 101 matched with protuberance 311, during work, when protuberance 311 coordinates to prevent Workpiece shaping plate 100 from moving with notch 101.
In the present embodiment, preferably, notch 101 and protuberance 311, in square shape, certainly, can also adopt trapezoidal or other abnormal shapes in actual applications.
In order to overcome the vibrations of Workpiece shaping plate generation above-below direction, the block 320 upwards arranged is provided with outside the matrix 310 of fixture 30, described block 320 is extended with raised line 321 towards the one side of Workpiece shaping plate 100, and described raised line 321 times edges are buckled in the upper surface of Workpiece shaping plate 100.
For the ease of carrying out pressing operation, be also extended with the pressure handle 322 of horizontally set outside described block 320, the design of pressure handle 322 can also play the effect avoiding block 320 and printhead to interfere collision simultaneously.
In order to further increase the coupling mechanism force of fixture to Workpiece shaping plate
,the present invention is also in the design of matrix, the height of described matrix medial extremity is higher than matrix outboard end, the program can make the edge of Workpiece shaping plate both sides produce contrary moment, thus realizes the locking to Workpiece shaping plate 100, makes an explanation below to its criteria in application embodiment:
As shown in Figure 3, matrix 310 medial extremity is provided with protruding 312, when Workpiece shaping plate 100 is fixed, raised line 321 pairs of Workpiece shaping plates 100 produce downward active force, and protruding 312 pairs of Workpiece shaping plates 100 produce active force upwards, form moment thus, realize the locking to Workpiece shaping plate 100.
As shown in Figure 4, matrix 310 by matrix medial extremity to matrix outboard end to inclination, when Workpiece shaping plate 100 is fixed, raised line 321 pairs of Workpiece shaping plates 100 produce downward active force, and the matrix upper surface tilted produces active force upwards to Workpiece shaping plate 100, form moment thus, realize the locking to Workpiece shaping plate 100.
In addition, said structure compensates because the setting in the face of raising of profiled sheeting end also provides surplus to the long term wear of Workpiece shaping plate 100 sidepiece and raised line 321, substantially increases the service life of Workpiece shaping plate and fixture.
In the present embodiment, raised line 321 is arranged at the both sides of protuberance 311.In the present embodiment, described matrix 310, protuberance 311, block 320 and raised line 321 are integrated.Certainly the mode of releasable connection also can be adopted when being beneficial to shaping.
In order to the upper-lower height realizing fixture 30 regulates, height adjustment bolt 50 is also provided with between described fixture 30 and supporting seat 20, one is offered for putting the fluting of nut in the middle part of described supporting seat 20, the nut 230 that fluting is embedded with for matching with height adjustment bolt, is embedded in middle part and can prevents from causing when bolt rotates nut 230 to deviate from downwards by nut 230.
In the present embodiment, described height adjustment bolt 50 is arranged in the middle part of protuberance 311, the deep gouge accommodating height adjustment bolt 50 is provided with in protuberance 311, during use, height adjustment bolt 50 lower end is run through fixture 30 and is stretched in supporting seat 20, along matching with deep gouge upper surface under the nut of height adjustment bolt 50, overcomes spring 40 elastic force through fixture 30 through bolt connection, realize fixing, described spring 40 is then arranged at height adjustment bolt 50 both sides in pairs.
Workpiece shaping plate 100 upper surface in the present invention higher than protuberance 311 upper surface, can effectively avoid printhead locate or work time and protuberance produce and collide.In the present invention, namely spring 40 plays the effect supporting fixture 30, simultaneously because the retractility of spring 40 conveniently can realize adjustment highly, is beneficial to maintenance; In addition, due to the flexible of spring 40, when dismantling Workpiece shaping plate 100, only need fixture 30 to be moved laterally the disengaging that (Fig. 7 direction of arrow) can realize Workpiece shaping plate 100 and fixture, very convenient.
As shown in figs. 8-10, described print platform is provided with and is arranged at printhead on moving beam and the air cooling equipment supporting with printhead, described printhead is placed on printer slide bar place axial slip with earrings 21, described air cooling equipment is integrated on printhead, motor-driven line material connecting gear 6 is provided with in described printing head base shell cavity 22, the axial side of seat shell cavity 22 is provided with the cooling fan 2 of alignment line material connecting gear, the bottom of seat shell cavity 22 is provided with print-head nozzle 1, and seat shell cavity 22 is provided with the air guide duct 23 towards print-head nozzle 1.
Described printing head base shell cavity forms cofferdam, air channel with the input of line material location-plate 31, motor outer wall 32 and wall shell 33, a shell cavity top is located at by described line material input location-plate 31, plate is provided with the locating hole 34 for the input of line material, motor outer wall 32 is relative with cooling fan 2, seat shell all the other two sides of cavity 22 and bottom are enclosed with a wall shell 33, the bottom end face of wall shell 33 is provided with air-guiding hole and communicates with air guide duct 23, and the air-flow that cooling fan is blown into printing head base shell cavity flows out from air guide duct 23 under the restriction in cofferdam, air channel.
Described printing head base shell cavity 22 side-walls is provided with fan through hole 3, and described cooling fan 2 is fixed on fan through hole 3 place with Easy-dismounting structure.
Described its top of air guide duct 23 communicates with printing head base shell cavity 22, and end is downward adjacent with nozzle 1, and its end air outlet 24 points to below nozzle 1 discharging opening.
Described print-head nozzle 1 upper end is connected with trunnion 9, trunnion 9 stretches in printing head base shell cavity 22, and trunnion 9 top is adjacent with line material connecting gear 6, and end is fixedly connected with nozzle 1, trunnion 9 tube wall in printing head base shell cavity 22 is connected with radiating block 8, and described radiating block 8 is with metal material moulding; Described air guide duct 23 quantity is 2, is distributed in trunnion 9 both sides.
Claims (10)
1. a 3D printer print platform, comprise the mobile table top being arranged at slippage on horizontal moving guide rail, it is characterized in that: described mobile table top is provided with the Workpiece shaping plate for putting shaping workpiece, described mobile table top both sides are provided with the fixture for fixation workpiece profiled sheeting, described fixture comprises the block that the matrix of support Workpiece shaping plate and matrix lateral are arranged, described block medial surface is extended with raised line, along the top edge being buckled in Workpiece shaping plate respective side portion under described raised line.
2. a kind of 3D printer print platform according to claim 1, described matrix is provided with a protuberance raised up, and described Workpiece shaping plate side has the notch matched with protuberance.
3. a kind of 3D printer print platform according to claim 1, the slide bearings with guide rail cooperating is provided with below described mobile table top, be connected through spring with supporting seat bottom described fixture, also running through between described fixture and supporting seat and have a height adjustment bolt, in the middle part of described supporting seat, being embedded with the nut for matching with height adjustment bolt.
4. a kind of 3D printer print platform according to claim 1, is also extended with the pressure handle of horizontally set outside described block.
5. a kind of 3D printer print platform according to claim 1, the upper level of described matrix medial extremity is higher than matrix outboard end upper surface.
6. a kind of 3D printer print platform according to claim 3, described mobile table top perimembranous is provided with and turns limit to downward-extension, and described supporting seat sidepiece is provided with convex closure, and described mobile table top turns limit and is provided with the slotted eye matched with convex closure.
7. a kind of 3D printer print platform according to claim 2, described Workpiece shaping plate upper surface is higher than protuberance upper surface.
8. a kind of 3D printer print platform according to claim 3, described supporting seat cross section is stepped, described mobile table top turns limit and is buckled in sidepiece above supporting seat terrace, and described spring is arranged on supporting seat terrace, and described mobile table top is threaded with supporting seat.
9. a kind of 3D printer print platform according to claim 1, described print platform is provided with and is arranged at printhead on moving beam and the air cooling equipment supporting with printhead, described printhead is placed on printer slide bar place axial slip with earrings, described air cooling equipment is integrated on printhead, motor-driven line material connecting gear is provided with in described printing head base shell cavity, the axial side of seat shell cavity is provided with the cooling fan of alignment line material connecting gear, the bottom of seat shell cavity is provided with print-head nozzle, and seat shell cavity is provided with the air guide duct towards print-head nozzle;
Described printing head base shell cavity becomes cofferdam, air channel with line material input location-plate, motor outer wall with wall hull shape, a shell cavity top is located at by described line material input location-plate, plate is provided with the locating hole for the input of line material, motor outer wall is relative with cooling fan, seat all the other two sides of shell cavity and bottom are enclosed with a wall shell, the bottom end face of wall shell is provided with air-guiding hole and communicates with air guide duct, and the air-flow that cooling fan is blown into printing head base shell cavity flows out from air guide duct under the restriction in cofferdam, air channel.
10. a kind of 3D printer print platform according to claim 9, described printing head base shell cavity wall place is provided with fan through hole, and described cooling fan is fixed on fan through hole with Easy-dismounting structure
,its top of described air guide duct communicates with printing head base shell cavity, end is downward adjacent with nozzle, its end air outlet points to below nozzle discharge hole, described print-head nozzle upper end is connected with trunnion, trunnion stretches in printing head base shell cavity, and trunnion top is adjacent with line material connecting gear, and end is fixedly connected with nozzle, trunnion tube wall in printing head base shell cavity is connected with radiating block, and described radiating block is with metal material moulding; Described air guide duct quantity is 2, is distributed in trunnion both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510192114.5A CN104842558B (en) | 2015-04-22 | 2015-04-22 | 3D printer print platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510192114.5A CN104842558B (en) | 2015-04-22 | 2015-04-22 | 3D printer print platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104842558A true CN104842558A (en) | 2015-08-19 |
| CN104842558B CN104842558B (en) | 2017-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510192114.5A Expired - Fee Related CN104842558B (en) | 2015-04-22 | 2015-04-22 | 3D printer print platform |
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| Country | Link |
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| CN (1) | CN104842558B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196552A (en) * | 2015-11-04 | 2015-12-30 | 北京太尔时代科技有限公司 | 3D (3-dimensional) printing platform |
| CN105690766A (en) * | 2016-03-15 | 2016-06-22 | 湘潭大学 | Device for easily peeling forming parts obtained by additive manufacturing on printing table |
| CN109228324A (en) * | 2018-08-17 | 2019-01-18 | 杭州喜马拉雅信息科技有限公司 | High-precision 3D printer |
| CN110181813A (en) * | 2018-02-23 | 2019-08-30 | 三纬国际立体列印科技股份有限公司 | Three-dimensional printing device |
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| CN2929807Y (en) * | 2005-12-02 | 2007-08-01 | 林乐贤 | Lock button device |
| CN103660297A (en) * | 2013-04-20 | 2014-03-26 | 朱仕杰 | Multi-printing-head three-dimensional printer |
| CN203876230U (en) * | 2014-04-16 | 2014-10-15 | 福建海源三维打印高科技有限公司 | Printing head of 3D printer |
| CN204936211U (en) * | 2015-04-22 | 2016-01-06 | 福州展旭电子有限公司 | 3D printer print platform |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2929807Y (en) * | 2005-12-02 | 2007-08-01 | 林乐贤 | Lock button device |
| CN103660297A (en) * | 2013-04-20 | 2014-03-26 | 朱仕杰 | Multi-printing-head three-dimensional printer |
| CN203876230U (en) * | 2014-04-16 | 2014-10-15 | 福建海源三维打印高科技有限公司 | Printing head of 3D printer |
| CN204936211U (en) * | 2015-04-22 | 2016-01-06 | 福州展旭电子有限公司 | 3D printer print platform |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196552A (en) * | 2015-11-04 | 2015-12-30 | 北京太尔时代科技有限公司 | 3D (3-dimensional) printing platform |
| CN105196552B (en) * | 2015-11-04 | 2017-08-29 | 北京太尔时代科技有限公司 | A kind of 3D printing platform |
| CN105690766A (en) * | 2016-03-15 | 2016-06-22 | 湘潭大学 | Device for easily peeling forming parts obtained by additive manufacturing on printing table |
| CN110181813A (en) * | 2018-02-23 | 2019-08-30 | 三纬国际立体列印科技股份有限公司 | Three-dimensional printing device |
| CN109228324A (en) * | 2018-08-17 | 2019-01-18 | 杭州喜马拉雅信息科技有限公司 | High-precision 3D printer |
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|---|---|
| CN104842558B (en) | 2017-06-16 |
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