CN108116205B - Reinforcement for vehicle back door inner plate - Google Patents
Reinforcement for vehicle back door inner plate Download PDFInfo
- Publication number
- CN108116205B CN108116205B CN201810022400.0A CN201810022400A CN108116205B CN 108116205 B CN108116205 B CN 108116205B CN 201810022400 A CN201810022400 A CN 201810022400A CN 108116205 B CN108116205 B CN 108116205B
- Authority
- CN
- China
- Prior art keywords
- reinforcement
- side wall
- back door
- door inner
- barb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002787 reinforcement Effects 0.000 title claims abstract description 51
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 19
- 239000003351 stiffener Substances 0.000 claims description 10
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 4
- 238000001746 injection moulding Methods 0.000 description 9
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J5/00—Doors
- B60J5/10—Doors arranged at the vehicle rear
- B60J5/101—Doors arranged at the vehicle rear for non-load transporting vehicles, i.e. family cars including vans
- B60J5/107—Doors arranged at the vehicle rear for non-load transporting vehicles, i.e. family cars including vans constructional details, e.g. about door frame, panels, materials used, reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J5/00—Doors
- B60J5/04—Doors arranged at the vehicle sides
- B60J5/042—Reinforcement elements
- B60J5/0422—Elongated type elements, e.g. beams, cables, belts or wires
- B60J5/0423—Elongated type elements, e.g. beams, cables, belts or wires characterised by position in the lower door structure
- B60J5/0431—Elongated type elements, e.g. beams, cables, belts or wires characterised by position in the lower door structure the elements being arranged at the hinge area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J5/00—Doors
- B60J5/04—Doors arranged at the vehicle sides
- B60J5/048—Doors arranged at the vehicle sides characterised by the material
- B60J5/0481—Doors arranged at the vehicle sides characterised by the material plastic
Abstract
The invention provides a reinforcement for a vehicle back door inner plate, which comprises a windshield mounting hole and a D column region, wherein the windshield mounting hole is formed above the vehicle back door inner plate, the D column region is positioned at two sides of the windshield mounting hole, the reinforcement comprises a pair of reinforcements symmetrically arranged in the D column region, each reinforcement is divided into a bending section and a vertical section from top to bottom, each bending section and each vertical section are composed of a first side wall, a second side wall and a first bottom plate, a honeycomb structure is arranged between the first side wall and the second side wall, and the whole reinforcement is formed by a composite material. According to the invention, the honeycomb type composite material reinforcing piece for the back door inner plate of the vehicle is high in strength, light in weight, simple in forming process, high in dimensional accuracy and high in stability.
Description
Technical Field
The present invention relates to the field of automotive manufacturing, and more particularly to a reinforcement for a vehicle tailgate inner panel.
Background
The main body of the back door of the two-compartment vehicle or SUV is usually formed by stamping metal plates, and has the defects of large weight, limited shape and the like. Along with the stricter requirements on energy conservation and emission reduction, the plastic back door has the advantages of obvious weight reduction effect, high modeling freedom degree and the like because of high integration level. However, the modulus of plastic backdoors is much lower than that of sheet metal backdoors, so that the plastic backdoor inner plate is usually combined with a metal insert or a metal assembly in the art to meet the performance requirements of the integral backdoor, particularly the rigidity, the strength and the like of the D-pillar area. The metal fitting is assembled after the injection molding of the back door inner plate.
However, the disadvantages of using metal inserts are: stamping and forming, and the structural design limitation is large; large size, weak structure, resulting in poor dimensional accuracy; complicating the injection molding process and mold. The disadvantages of using metal fittings are: stamping and forming, and the structural design limitation is large; the quality is heavier.
Disclosure of Invention
The invention aims to provide a reinforcement for a vehicle back door inner plate, so as to solve the problems of large structural design limitation, poor dimensional precision, complicated injection molding process and mold and heavy mass of a metal insert and a metal assembly part for the vehicle back door inner plate in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a reinforcement for vehicle back door inner panel, vehicle back door inner panel is including opening the windshield mounting hole in its top, and is located the D post region of windshield mounting hole both sides, the reinforcement including the symmetry arrange in a pair of reinforcement in D post region, every reinforcement top-down divide into section of bending and vertical section, the section of bending and vertical section are constituteed by first lateral wall, second lateral wall and first bottom plate, be equipped with honeycomb between first lateral wall and the second lateral wall, the reinforcement is whole by combined material shaping.
The honeycomb structure on the stiffener consists of a number of cells with hexagonal outline.
The bottom surface of the unit cell of the non-key part on the reinforcement is thinned or hollowed out, and the non-key part is determined according to topology analysis.
The composite material comprises: continuous glass fibers, carbon fibers, and the like, virtually any material that can be used in an injection molding process can be used to process the reinforcement.
The vertical section of the reinforcement encloses a cavity with a trapezoid cross-section shape through the first side wall, the second side wall and the first bottom plate, the first side wall and the second side wall alternately form a trapezoid cross-section structure through a plurality of convex parts and concave parts, the convex parts are in a shape protruding towards the cavity, and the concave parts are in a shape recessed towards the cavity.
Every two convex parts are separated by a concave part along the vertical direction of the reinforcement.
The vehicle back door inner plate is surrounded by a third side wall, a fourth side wall and a second bottom plate in the D column area to form a cavity corresponding to the reinforcing element, a first barb is arranged on the outer side of the first side wall and/or the second side wall of the reinforcing element, and a second barb corresponding to the first barb is arranged on the inner side of the third side wall and/or the fourth side wall of the vehicle back door inner plate.
The first barb of the reinforcement is inserted into a gap between the third side wall and the second barb and/or a gap between the fourth side wall and the second barb of the vehicle door inner panel.
And a metal mosaic structure is further arranged in a part of the area on the reinforcing piece, and the metal mosaic structure and the reinforcing piece are integrally formed.
The reinforcement is connected with the vehicle back door inner panel through a fastener.
According to the reinforcement for the vehicle back door inner plate, provided by the invention, the honeycomb type composite material reinforcement is provided by taking the composite material as a base and combining with a special honeycomb structure design, so that the formability of plastics is fully utilized, the design of a product is greatly improved, and the mechanical properties of the product, including rigidity, strength and the like, are ensured. And the product size precision and stability are greatly improved by combining special structural transformation and design.
In a word, the invention provides the honeycomb type composite material reinforcement for the back door inner plate of the vehicle, which has the advantages of high strength, light weight, simple forming process, simplified die, high dimensional accuracy and strong stability.
Drawings
FIG. 1 is a schematic structural view of a reinforcement member assembled with a vehicle tailgate inner panel, provided in accordance with a preferred embodiment of the present invention;
FIG. 2 is a front view of one of the pair of stiffeners shown in FIG. 1;
FIG. 3 is a perspective view of the stiffener shown in FIG. 2;
FIG. 4 is an enlarged schematic view of a portion of the structure in which the reinforcement member shown in FIG. 1 is assembled with a vehicle tailgate inner panel;
FIG. 5 is a cross-sectional view taken along section line A-A of FIG. 4;
FIG. 6 is a perspective view of a stiffener provided in accordance with another preferred embodiment of the present invention;
fig. 7 is a perspective view of a reinforcement provided in accordance with yet another preferred embodiment of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples. It should be understood that the following examples are illustrative of the present invention and are not intended to limit the scope of the present invention.
According to a preferred embodiment of the present invention, there is provided a reinforcement for a vehicle back door inner panel, as shown in fig. 1, which shows both the reinforcement 100 and the vehicle back door inner panel 200 assembled together.
The vehicle back door inner panel 200 includes a windshield mounting hole 201 formed above the vehicle back door inner panel, and D-pillar regions 202 located on both sides of the windshield mounting hole 201, as shown by the circled portion in fig. 1.
The reinforcing member 100 includes a pair of reinforcing members (parts with lines deepened as shown in fig. 1) symmetrically arranged in the D-pillar region 202, and as shown in fig. 2, each reinforcing member is divided into a bent section 101 and a vertical section 102 from top to bottom, the bent section 101 and the vertical section 102 are each composed of a first side wall 1, a second side wall 2, and a first bottom plate 3 (see fig. 3), a honeycomb structure 4 is provided between the first side wall 1 and the second side wall 2, and the reinforcing member 100 is integrally molded of a composite material.
According to the preferred embodiment, the composite material is taken as a basis, and by way of example and not limitation, a common injection molding process is adopted, and it is understood that the molding process is not limited to injection molding, but can be other molding processes, and a honeycomb type composite material reinforcing member is provided in combination with a special honeycomb structure so as to replace a metal insert and a metal assembly part adopted in the prior art, thereby fully utilizing the formability of plastics, greatly improving the design property of products, ensuring the mechanical properties (including rigidity, strength and the like) of the products, and overcoming the defects of large structural design limitation, poor dimensional accuracy, complicated injection molding process and mold and heavy quality of the metal insert and the metal assembly part in the prior art.
As shown in fig. 2, the honeycomb structure 4 on the reinforcing member 100 is composed of a plurality of unit cells 41 having a hexagonal outline. It is also preferable to calculate which areas of the product are less stressed and have a margin according to the topology analysis, i.e. CAE simulation, and then thin or hollowed out the bottom surface of the cell 41' of the non-critical part (as shown by the circled part in the figure) to play a role in reducing weight. The honeycomb structure is light and firm, and the effective topology is hollowed out, so that the whole reinforcement piece realizes the mass minimization on the basis of ensuring the rigidity of the whole reinforcement piece.
Non-critical locations where thinning or hollowing can occur are determined after the topology analysis described above, preferably by direct injection molding the stiffener 100 in one shot with a thinned or hollowed out design without further subsequent processing.
Any material to which an injection molding process can be applied can be used to process the reinforcement according to the invention, such as continuous glass fibers, carbon fibers, etc.
According to this preferred embodiment, as shown in fig. 3, the vertical section 102 of the stiffener 100 encloses a cavity with a trapezoidal cross-sectional shape by the first side wall 1, the second side wall 2 and the first bottom plate 3, wherein the first side wall 1 and the second side wall 2 each alternately form a trapezoidal cross-sectional structure with a plurality of protrusions 11 and recesses 12, the protrusions 11 having a shape protruding towards the cavity, the recesses 12 having a shape recessed towards the cavity.
Each two protrusions 11 are separated by one recess 12 along the vertical direction of the stiffener 100 in the in-use state.
According to the preferred embodiment, as shown in fig. 4 and 5, the vehicle back door inner panel 200 encloses a cavity corresponding to the reinforcement member 100 in the D-pillar region 202 through the third side wall 203, the fourth side wall 204 and the second bottom plate 205, wherein, in order to assist in correcting deformation of the D-pillar region 202 of the vehicle back door inner panel 200, the outer sides of the first side wall 1 and the second side wall 2 of the reinforcement member 100 are provided with the first barbs 5, and the inner sides of the third side wall 203 and the fourth side wall 204 of the vehicle back door inner panel 200 are provided with the second barbs 206 corresponding to the first barbs 5. Preferably, the first barb 5 of the reinforcement 100 is inserted into the space between the third sidewall 203 and the second barb 206 of the vehicle back door inner panel 200 and the space between the fourth sidewall 204 and the second barb 206.
Because the D column area of the back door inner plate of the general vehicle is of a V-shaped opening structure, and the position of the inner plate is also of an appearance surface, the special structure cannot be added to strengthen the rigidity of the back door inner plate, so that the V-shaped opening of the back door inner plate is opened, and the size deviation is large. According to the preferred embodiment of the present invention, by adding the corresponding barb structures to the reinforcement 100 and the vehicle back door inner panel 200 at the same time, the effect of correcting the dimensional deviation of the vehicle back door inner panel 200 can be achieved by utilizing the higher rigidity and dimensional accuracy of the reinforcement 100 itself.
According to the preferred embodiment, as shown in fig. 6, a metal inlay 7 is provided in a part of the area of the reinforcement 100, in particular the area with special mounting strength requirements (e.g. oval circled area in the figure). The damascene structure 7 is preferably integrally injection molded with the composite material forming the body of the stiffener 100 during processing.
Because the hinge and the air brace are main long-term stress points in the back door of the vehicle, the strength requirement, the rigidity requirement and the fatigue requirement of the back door are very high, and the performance requirement of the back door can be well met in a mode of combining the composite material and the metal inlay. And through the mechanical conduction of the middle reinforcing piece, the air supporting force can be effectively and directly transmitted to the hinge, and weak stress at the back door and window frame is reduced.
According to the preferred embodiment, in combination with CAE simulation analysis, mounting point positions, at which the reinforcement 100 is connected with the vehicle back door inner panel 200 by the fastener 8, are reasonably arranged to optimize the rigidity of the overall back door, as shown in fig. 7.
According to the above preferred embodiment of the present invention, a honeycomb composite material reinforcement is provided by using a composite material having high strength and light weight in combination with a honeycomb structure, and the reinforcement has a significantly reduced mass and sufficiently exhibits injection moldability without deteriorating the performance thereof with respect to a metal reinforcement, and can satisfy various design requirements. Finally, the problem of poor dimensional accuracy of the plastic back door D column opening is effectively solved by combining a special trapezoid side wall structure and a hook structure.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and various modifications can be made to the above-described embodiment of the present invention. All simple, equivalent changes and modifications made in accordance with the claims and the specification of the present application fall within the scope of the patent claims. The present invention is not described in detail in the conventional art.
Claims (8)
1. The reinforcement for the back door inner plate of the vehicle comprises a windshield mounting hole and D column areas, wherein the windshield mounting hole is formed in the upper side of the vehicle back door inner plate, and the D column areas are positioned on two sides of the windshield mounting hole; the vertical section of the reinforcement encloses a cavity with a trapezoid cross-section shape through the first side wall, the second side wall and the first bottom plate, the first side wall and the second side wall alternately form a trapezoid cross-section structure through a plurality of convex parts and concave parts, the convex parts are in a shape protruding towards the cavity, and the concave parts are in a shape recessed towards the cavity.
2. The stiffener of claim 1, wherein the honeycomb structure on the stiffener is comprised of a number of cells having a hexagonal profile.
3. The reinforcement of claim 1, wherein the composite material comprises: continuous glass fibers and carbon fibers.
4. A reinforcing element according to claim 1, wherein each two protrusions are separated by a recess in the vertical direction of the reinforcing element.
5. The reinforcement of claim 1, wherein the vehicle tailgate inner panel encloses a cavity corresponding to the reinforcement in the D-pillar region by a third side wall, a fourth side wall, and a second floor, wherein the first side wall and/or the second side wall of the reinforcement has a first barb on an outer side thereof, and wherein the third side wall and/or the fourth side wall of the vehicle tailgate inner panel has a second barb on an inner side thereof corresponding to the first barb.
6. The reinforcement of claim 5, wherein the first barb of the reinforcement is inserted into a void between the third sidewall and the second barb and/or a void between the fourth sidewall and the second barb of the vehicle tailgate inner panel.
7. A reinforcing element according to claim 1, wherein a portion of the area on the reinforcing element is further provided with a metal inlay, which is integrally formed with the reinforcing element.
8. The reinforcement of claim 1, wherein the reinforcement is connected to the vehicle back door inner panel by a fastener.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810022400.0A CN108116205B (en) | 2018-01-10 | 2018-01-10 | Reinforcement for vehicle back door inner plate |
| EP18899142.6A EP3737576A4 (en) | 2018-01-10 | 2018-12-10 | Reinforcing element for automobile tailgate inner panel |
| PCT/CN2018/119977 WO2019137130A1 (en) | 2018-01-10 | 2018-12-10 | Reinforcing element for automobile tailgate inner panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810022400.0A CN108116205B (en) | 2018-01-10 | 2018-01-10 | Reinforcement for vehicle back door inner plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108116205A CN108116205A (en) | 2018-06-05 |
| CN108116205B true CN108116205B (en) | 2024-03-29 |
Family
ID=62232891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810022400.0A Active CN108116205B (en) | 2018-01-10 | 2018-01-10 | Reinforcement for vehicle back door inner plate |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3737576A4 (en) |
| CN (1) | CN108116205B (en) |
| WO (1) | WO2019137130A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102624278B1 (en) * | 2017-02-16 | 2024-01-12 | 마그나 익스테리어즈 인크. | Infrared welded liftgate assembly and process of making same |
| CN108116205B (en) * | 2018-01-10 | 2024-03-29 | 延锋彼欧汽车外饰系统有限公司 | Reinforcement for vehicle back door inner plate |
| CN108583244A (en) * | 2018-06-27 | 2018-09-28 | 延锋彼欧汽车外饰系统有限公司 | A kind of tail-gate skeleton structure |
| CN109538049A (en) * | 2018-11-20 | 2019-03-29 | 溧阳市力士汽车配件制造有限公司 | A kind of new material hinge stiffening plate and its production method |
| US11305822B2 (en) * | 2018-11-27 | 2022-04-19 | Magna Exteriors, Inc. | Liftgate arrangement having a carbon fiber reinforced sheet molding compound reinforcement |
| CN109532432B (en) * | 2018-12-19 | 2024-04-09 | 宁波信泰机械有限公司 | Plastic tail door part of automobile |
| CN109774437A (en) * | 2019-01-17 | 2019-05-21 | 宁波信泰机械有限公司 | A kind of overall plastic tail-gate assembly of lightweight |
| FR3094924A1 (en) * | 2019-04-15 | 2020-10-16 | Compagnie Plastic Omnium | Tailgate liner with composite reinforcement insert |
| CN110093754B (en) * | 2019-04-19 | 2021-11-19 | 无锡小天鹅电器有限公司 | Washing machine's top cap, shell subassembly and washing machine |
| CN115158475A (en) * | 2022-06-27 | 2022-10-11 | 重庆长安汽车股份有限公司 | Reinforcement on A post, side wall assembly and vehicle with inhomogeneous honeycomb inner core |
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| EP1927453A1 (en) * | 2006-11-03 | 2008-06-04 | Compagnie Plastic Omnium | Method for manufacturing an inner lining of a tailgate using a strengthened plastic material |
| US8899658B1 (en) * | 2013-11-21 | 2014-12-02 | Ford Global Technologies, Llc | Liftgate hinge reinforcement |
| CN205498569U (en) * | 2016-04-20 | 2016-08-24 | 常熟龙创汽车技术有限公司 | Light car back door |
| CN106004377A (en) * | 2016-07-05 | 2016-10-12 | 重庆长安汽车股份有限公司 | Automotive back-door internal plate |
| JP2017001553A (en) * | 2015-06-11 | 2017-01-05 | 豊田合成株式会社 | Automobile exterior article |
| JP2017109586A (en) * | 2015-12-16 | 2017-06-22 | 本田技研工業株式会社 | Tailgate structure |
| CN207697463U (en) * | 2018-01-10 | 2018-08-07 | 延锋彼欧汽车外饰系统有限公司 | A kind of reinforcer for tailgate of vehicles inner panel |
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| JP2002255060A (en) * | 2001-03-01 | 2002-09-11 | Araco Corp | Pillar structure of vehicle with sideway opening back door |
| DE102004032109B4 (en) * | 2004-07-02 | 2008-01-03 | Audi Ag | Door for a motor vehicle |
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| CN106869707B (en) * | 2017-03-31 | 2018-08-31 | 延锋彼欧汽车外饰系统有限公司 | A kind of tail-gate of composite material |
| CN108116205B (en) * | 2018-01-10 | 2024-03-29 | 延锋彼欧汽车外饰系统有限公司 | Reinforcement for vehicle back door inner plate |
-
2018
- 2018-01-10 CN CN201810022400.0A patent/CN108116205B/en active Active
- 2018-12-10 EP EP18899142.6A patent/EP3737576A4/en not_active Withdrawn
- 2018-12-10 WO PCT/CN2018/119977 patent/WO2019137130A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1927453A1 (en) * | 2006-11-03 | 2008-06-04 | Compagnie Plastic Omnium | Method for manufacturing an inner lining of a tailgate using a strengthened plastic material |
| US8899658B1 (en) * | 2013-11-21 | 2014-12-02 | Ford Global Technologies, Llc | Liftgate hinge reinforcement |
| JP2017001553A (en) * | 2015-06-11 | 2017-01-05 | 豊田合成株式会社 | Automobile exterior article |
| JP2017109586A (en) * | 2015-12-16 | 2017-06-22 | 本田技研工業株式会社 | Tailgate structure |
| CN205498569U (en) * | 2016-04-20 | 2016-08-24 | 常熟龙创汽车技术有限公司 | Light car back door |
| CN106004377A (en) * | 2016-07-05 | 2016-10-12 | 重庆长安汽车股份有限公司 | Automotive back-door internal plate |
| CN207697463U (en) * | 2018-01-10 | 2018-08-07 | 延锋彼欧汽车外饰系统有限公司 | A kind of reinforcer for tailgate of vehicles inner panel |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3737576A1 (en) | 2020-11-18 |
| EP3737576A4 (en) | 2021-03-03 |
| CN108116205A (en) | 2018-06-05 |
| WO2019137130A1 (en) | 2019-07-18 |
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