WO2021064983A1 - センターハブステアリング方式における前輪操舵機構 - Google Patents
センターハブステアリング方式における前輪操舵機構 Download PDFInfo
- Publication number
- WO2021064983A1 WO2021064983A1 PCT/JP2019/039302 JP2019039302W WO2021064983A1 WO 2021064983 A1 WO2021064983 A1 WO 2021064983A1 JP 2019039302 W JP2019039302 W JP 2019039302W WO 2021064983 A1 WO2021064983 A1 WO 2021064983A1
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- WIPO (PCT)
- Prior art keywords
- hub
- steering
- shaft
- outer ring
- front wheel
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K21/00—Steering devices
- B62K21/005—Steering pivot axis arranged within the wheel, e.g. for a hub center steering arrangement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K25/00—Axle suspensions
- B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
- B62K25/12—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg
- B62K25/22—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg with more than one arm on each fork leg
- B62K25/24—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg with more than one arm on each fork leg for front wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B1/00—Spoked wheels; Spokes thereof
- B60B1/02—Wheels with wire or other tension spokes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0047—Hubs characterised by functional integration of other elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/02—Hubs adapted to be rotatably arranged on axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/12—Motorcycles, Trikes; Quads; Scooters
Definitions
- the present invention relates to a front wheel steering mechanism in a center hub steering system.
- a telescopic fork system is known as a steering mechanism and shock absorbing mechanism for two-wheeled vehicles such as bicycles and motorcycles.
- the front shaft is held from both sides by two telescopic shafts and steered by the steering shaft on the upper part of the front wheels. Since it has a simple structure and can be manufactured at low cost, it can be used as a steering mechanism for a two-wheeled vehicle. , Most commonly adopted.
- the telescopic fork method has the following drawbacks.
- the front fork since the front fork is located between the main body frame and the front wheels, the connection distance between the front and rear wheel axles is long, and it becomes vulnerable to lateral external force, which reduces the rigidity of the entire motorcycle. There is.
- Patent Document 1 Japanese Unexamined Patent Publication No. 3-208785 discloses the basic technical contents of the method.
- the center hub steering system you can enjoy the advantage that the trail does not become small and the steering characteristics do not change during braking. Further, since the connection distance between the front and rear wheel axles can be shortened as compared with the two-wheeled vehicle adopting the telescopic fork method, it is possible to increase the rigidity of the entire two-wheeled vehicle. Since the center hub steering system has such advantages, the structure is a little more complicated than the telescopic fork system, and the manufacturing cost is slightly increased, but the center hub steering system is still being adopted even now.
- Patent Document 2 Japanese Patent Laid-Open No. 2002-500133 discloses a technique relating to a center hub steering system, in which, in order to secure an offset, the hub steering shaft is behind the front shaft. , It is configured to be located at a predetermined distance from the front shaft. According to this configuration, the outer diameter of the hub bearing does not increase even if a sufficient offset is taken to secure the desired steering performance and the like. Therefore, it is possible to enjoy the advantage that the bearing friction does not increase and the problem of seizure of the bearing does not occur.
- Patent Document 2 Although the technique disclosed in Patent Document 2 is excellent in the idea itself, it is necessary to have a configuration in which the hub body (reference numeral 3 of Patent Document 2) is housed in the central space of the front wheel, which is a rigid body. At some point, since the opening of the central space is smaller than that of the hub body, it is impossible to store the hub body in the central space in manufacturing. Furthermore, Patent Document 2 does not disclose or suggest a manufacturing method or the like that can solve this problem.
- the inventor of the present application has made extensive studies on methods and means that can solve the above problems. As a result, the inventor of the present application has found that the above problems can be solved by configuring the outer ring hub with two independent hubs on the left and right sides, and has come to create the present invention.
- the present invention relates to a front wheel steering mechanism in a center hub steering system, and in particular, even if a sufficient offset is taken, an optimum geometry setting is made, and a desired steering performance or the like is ensured, the front wheels are preferably used. It is an object of the present invention to provide a front wheel steering mechanism that can be mounted in a feasible manner. Another object of the present invention is to provide a front wheel steering mechanism capable of dramatically improving rolling performance and fuel efficiency without increasing the outer diameter of the hub bearing and increasing bearing friction. Another object of the present invention is to provide a front wheel steering mechanism in a center hub steering system that is lightweight and can be applied to a bicycle by forming the front wheels with wire spoke wheels.
- the front wheel steering mechanism includes an inner ring hub, an outer ring hub, a pair of rolling bearings arranged between the inner and outer ring hubs, a front shaft, and a hub steering bracket attached to the outside of the front shaft.
- the first hub steering shaft hole is provided, and the hub steering bracket is also provided with a second hub steering shaft hole for inserting the hub steering shaft.
- the inner ring hub is attached to the hub steering bracket so as to freely rotate around the hub steering shaft.
- the outer ring hub is composed of a left outer ring hub and a right outer ring hub that can be separated left and right along the rotation axis direction, and is characterized in that these left and right outer ring hubs are rigidly coupled.
- the front wheel steering mechanism includes an inner ring hub, an outer ring hub, a pair of rolling bearings arranged between the inner and outer ring hubs, a front shaft, a hub steering bracket attached to the outside of the front shaft, and a hub steering bracket.
- a hub steering shaft is provided, and the inner ring hub is first for inserting the hub steering shaft into the inner ring hub at a position behind the front shaft and at a predetermined distance from the front shaft.
- the hub steering shaft is provided with a hole for the hub steering shaft, and the hub steering bracket is also provided with a second hole for the hub steering shaft through which the hub steering shaft is inserted.
- the inner ring hub penetrates the holes for the first and second hub steering shafts, and the inner ring hub is attached to the hub steering bracket so as to freely rotate around the hub steering shaft, and the outer ring hub.
- the front wheel steering mechanism according to the present invention is also characterized in that, in the pair of rolling bearings, balls or tapered rollers, which are constituent members of the pair of rolling bearings, are arranged in a single row.
- a front wheel steering mechanism capable of mounting the front wheels in a suitable and feasible manner even if the offset is sufficiently taken, the optimum geometry is set, and the desired steering performance and the like are secured. Can be done. It is also possible to provide a front wheel steering mechanism capable of dramatically improving rolling performance and fuel efficiency without increasing the outer diameter of the hub bearing and increasing bearing friction. Further, in the present invention, by configuring the front wheels with wire spoke wheels, it is possible to provide a front wheel steering mechanism in a center hub steering system that is lightweight and can be applied to a bicycle.
- the figure which shows the front wheel steering mechanism 1 which concerns on 1st Embodiment of this invention The figure which shows the front wheel steering mechanism 1 which concerns on 1st Embodiment of this invention.
- the figure which shows the front wheel steering mechanism 1 which concerns on 1st Embodiment of this invention The figure which shows the front wheel steering mechanism 1 which concerns on the 2nd Embodiment of this invention.
- FIGS. 1 and 2 and the lower side in FIG. 3 show the basic configuration of the front wheel steering mechanism 1 according to the present embodiment (first embodiment).
- the front wheel steering mechanism 1 applied to the motorcycle is shown, and the left side in FIGS. 1 and 2 and the lower side in FIG. 3 are the traveling direction (forward direction) of the motorcycle.
- 2 is an inner ring hub
- 3 (3a, 3b) is an outer ring hub
- 4 and 4 are a pair of rolling bearings arranged between the inner ring hub 2 and the outer ring hub 3
- 5 is a front shaft.
- 6 indicates a hub steering bracket attached to the outside of the front shaft 5
- 10 indicates a hub steering shaft.
- FIGS. 1 to 3 7 is a front swing arm, 8 is an upper rod, 9 is a link arm, 16 is a tire, 17 is a steering rod, 18 is a steering arm, 19 is a disc brake, and 20 is an oil seal. ing.
- the functions and structures of the members according to reference numerals 7 to 9 and reference numerals 16 to 20 are the same as those adopted in the conventional center hub steering system, and thus will not be described in particular below.
- the hub steering shaft 10 is inserted into the inner ring hub 2 at a position (offset position) behind the front shaft 5 and at a predetermined distance from the front shaft 5.
- Two holes 11a for the first hub steering shaft are provided.
- the hub steering bracket 6 is also provided with a second hub steering shaft hole 11b for inserting the hub steering shaft 10.
- the hub steering shaft 10 is a second hub located between two first hub steering shaft holes 11a and these two first hub steering shaft holes 11a. It is inserted through the steering shaft hole 11b and fixed by a nut 10a. As a result, the inner ring hub 2 is attached to the hub steering bracket 6 so as to freely rotate around the hub steering shaft 10.
- the steering bearings 21 and 21 are provided between the inner ring hub 2 and the flange portion of the hub steering shaft 10 and between the inner ring hub 2 and the flange portion of the nut 10a so that the inner ring hub 2 can rotate smoothly. It is preferable to arrange the steering bearings 21 and 21 respectively. In this case, the smaller the diameter S1 (see FIG. 6) of the steer bearing 21, the more the bearing friction can be reduced. Further, as the distance S2 (see FIG. 6) between the two steering bearings 21 becomes larger, the moment applied from the front wheels to the hub steering shaft 10 during acceleration / deceleration of the vehicle body becomes smaller, so that the radial (diameter) load on the steering bearings 21 becomes smaller. You can also get the effect of reducing the amount.
- the cover 6a is fixed to the hub steering bracket 6 by the bolt 12.
- the hub steering bracket 6 is attached to the outside of the front shaft 5 by the configuration in which the front shaft 5 is inserted between the hub steering bracket 6 and the cover 6a.
- the outer ring hub 3 is composed of a left outer ring hub 3a and a right outer ring hub 3b, and can be separated to the left and right along the rotation axis direction of the front wheels.
- the left outer ring hub 3a and the right outer ring hub 3b are rigidly coupled by bolts 12.
- the rigid coupling here may be performed by a fastening means other than the bolt.
- the hub steering shaft 10 is behind the front shaft 5 and is predetermined from the front shaft 5. Even when the vehicle is located at a distance (offset position), the front wheels of a motorcycle or the like can be mounted in a suitable and feasible manner. Further, this makes it possible to provide a front wheel steering mechanism capable of dramatically improving rolling performance and fuel efficiency without increasing the outer diameter of the hub bearing and increasing bearing friction.
- the front wheel steering mechanism 1 in the second embodiment is significantly different from that in the first embodiment described above in that the front wheels are composed of wire spoke wheels.
- FIGS. 7 to 9 show the basic configuration of the front wheel steering mechanism 1 according to the present embodiment.
- the front wheel steering mechanism 1 applied to the bicycle is shown, and the left side in FIGS. 7 and 8 and the lower side in FIG. 9 are the traveling directions (forward directions) of the bicycle.
- 2 is an inner ring hub
- 3a is a left outer ring hub
- 3b is a right outer ring hub
- 4 and 4 are between the inner ring hub 2 and the left outer ring hub 3a
- the inner ring hub 2 and the right outer ring hub 3b
- 5 is a front shaft
- 6 is a hub steering bracket attached to the outside of the front shaft
- 10 is a hub steering shaft.
- 13 indicates a front horizontal fork.
- 16 is a tire
- 17 is a steering rod
- 18 is a steering arm
- 19 is a disc brake
- 20 is an oil seal.
- the hub steering shaft 10 is inserted into the inner ring hub 2 at a position (offset position) behind the front shaft 5 and at a predetermined distance from the front shaft 5.
- Two holes 11a for the first hub steering shaft are provided.
- the hub steering bracket 6 is also provided with a second hub steering shaft hole 11b for inserting the hub steering shaft 10.
- the hub steering shaft 10 is a second hub located between two first hub steering shaft holes 11a and these two first hub steering shaft holes 11a. It is inserted through the steering shaft hole 11b and fixed by a nut 10a. As a result, the inner ring hub 2 is attached to the hub steering bracket 6 so as to freely rotate around the hub steering shaft 10.
- the hub steering bracket 6 is configured such that the front shaft 5 is inserted at a position before the second hub steering shaft hole 11b. As a result, the hub steering bracket 6 is attached to the outside of the front shaft 5.
- the outer ring hub 3 is composed of a left outer ring hub 3a and a right outer ring hub 3b, which are independent of each other, and the left outer ring hub 3a and the right outer ring hub 3b are shown in FIG. As shown in FIG. 9, it is connected to the rim 15 via a plurality of wire spokes 14.
- the hub steering shaft 10 is behind the front shaft 5 and is predetermined from the front shaft 5. Even when the vehicle is located at a distance (offset position), the front wheels of a bicycle or the like can be attached in a suitable and feasible manner. In addition, this provides a front wheel steering mechanism that can dramatically improve rolling performance and fuel efficiency (when used in motorcycles, etc.) without increasing the outer diameter of the hub bearing and increasing bearing friction. be able to.
- the front wheel structure of the two-wheeled vehicle can be formed by the wire spoke wheels, it is possible to provide a lightweight front wheel structure that can absorb the impact even in the wheel itself. ..
- a ball is used as a constituent member of the rolling bearing 4, but this may be a tapered roller.
- the balls or tapered rollers are preferably arranged in a single row. This is because the space can be saved and the bearing friction can be further reduced by arranging in a single row. Further, in this case, if the rolling bearing 4 adopts a 4-point contact ball bearing as shown in FIG. 13, it can be made strong against a load in the axial direction, and further, wire spokes are stretched. Even in the front, the inner ring hub 2 and the left outer ring hub 3a, and the inner ring hub 2 and the right outer ring hub 3b can be fixed, and their assembly can be simplified.
- the front wheel steering mechanism according to the present invention can be applied not only to two-wheeled vehicles such as bicycles and motorcycles but also to vehicles having three or more wheels as long as the vehicle can adopt the center hub steering system. ..
- the present invention in a vehicle adopting the center hub steering system, even if the front wheels are provided with sufficient offset, the optimum geometry is set, and the desired steering performance is secured. It is possible to provide a front wheel steering mechanism that can be mounted in a suitable and feasible manner. It is also possible to provide a front wheel steering mechanism capable of dramatically improving rolling performance and fuel efficiency without increasing the outer diameter of the hub bearing and increasing bearing friction. Further, in the present invention, by configuring the front wheels with wire spoke wheels, it is possible to provide a front wheel steering mechanism in a center hub steering system that is lightweight and can be applied to a bicycle.
- the front wheel steering mechanism according to the present invention is adopted in the center hub steering system, the front wheel steering mechanism according to the present invention naturally has all the advantages of the center hub steering system. You can enjoy it.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Steering Devices For Bicycles And Motorcycles (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Axle Suspensions And Sidecars For Cycles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
α:キャスター角
β:舵角
A:回転軸
B:操舵軸
C:車体中心軸
D:トレール
E:オフセット
H1:ハブベアリング径
H2:ハブベアリング間隔
S1:ステアベアリング径
S2:ステアベアリング間隔
2 :内輪ハブ、
3 :外輪ハブ、
3a:左外輪ハブ、
3b:右外輪ハブ、
4 :転がり軸受け、
5 :フロントシャフト、
6 :ハブステアリングブラケット、
6a:カバー、
7 :フロントスイングアーム、
8 :アッパーロッド、
9 :リンクアーム、
10:ハブステアリングシャフト、
10a:ナット、
11a:第一のハブステアリングシャフト用孔、
11b:第二のハブステアリングシャフト用孔、
12:ボルト、
13:フロントホリゾンタルフォーク、
14:ワイヤースポーク、
15:リム、
16:タイヤ、
17:ステアリングロッド、
18:ステアリングアーム、
19:ディスクブレーキ、
20:オイルシール、
21:ステアベアリング、
α:キャスター角、
β:舵角、
A:回転軸、
B:操舵軸、
C:車体中心軸、
D:トレール、
E:オフセット、
H1:ハブベアリング径、
H2:ハブベアリング間隔、
S1:ステアベアリング径、
S2:ステアベアリング間隔
Claims (4)
- センターハブステアリング方式における前輪操舵機構において、内輪ハブ、外輪ハブ、それら内外輪ハブの間に配置された一対の転がり軸受け、フロントシャフト、当該フロントシャフトの外側に取り付けられたハブステアリングブラケット、及び、ハブステアリングシャフトとを備えており、
前記内輪ハブには、前記フロントシャフトの後方であって、かつ、前記フロントシャフトから所定の距離をおいた位置において、前記ハブステアリングシャフトを挿通させるための第一のハブステアリングシャフト用孔が設けられており、
前記ハブステアリングブラケットにも、前記ハブステアリングシャフトを挿通させるための第二のハブステアリングシャフト用孔が設けられており、
前記ハブステアリングシャフトは、前記第一及び前記第二のハブステアリングシャフト用孔を貫通しており、
前記内輪ハブは、前記ハブステアリングシャフトを軸中心として自在に回動するように前記ハブステアリングブラケットに取り付けられており、
前記外輪ハブは、回転軸方向に沿って左右に分離可能なようになっている左外輪ハブと右外輪ハブとから構成され、これら左右外輪ハブが剛性結合していることを特徴とする前輪操舵機構。 - 前記一対の転がり軸受けにおいて、それらの構成部材である玉、又は、円すいころが単列配置されていることを特徴とする請求項1に記載の前輪操舵機構。
- センターハブステアリング方式における前輪操舵機構において、内輪ハブ、外輪ハブ、それら内外輪ハブの間に配置された一対の転がり軸受け、フロントシャフト、当該フロントシャフトの外側に取り付けられたハブステアリングブラケット、及び、ハブステアリングシャフトとを備えており、
前記内輪ハブには、前記フロントシャフトの後方であって、かつ、前記フロントシャフトから所定の距離をおいた位置において、前記ハブステアリングシャフトを挿通させるための第一のハブステアリングシャフト用孔が設けられており、
前記ハブステアリングブラケットにも、前記ハブステアリングシャフトを挿通させるための第二のハブステアリングシャフト用孔が設けられており、
前記ハブステアリングシャフトは、前記第一及び前記第二のハブステアリングシャフト用孔を貫通しており、
前記内輪ハブは、前記ハブステアリングシャフトを軸中心として自在に回動するように前記ハブステアリングブラケットに取り付けられており、
前記外輪ハブは、各個独立した左外輪ハブと右外輪ハブとから構成され、これら左右外輪ハブが、複数のワイヤースポークを介してリムと結合していることを特徴とする前輪操舵機構。 - 前記一対の転がり軸受けにおいて、それらの構成部材である玉、又は、円すいころが単列配置されていることを特徴とする請求項3に記載の前輪操舵機構。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2020524419A JP6780193B1 (ja) | 2019-10-04 | 2019-10-04 | センターハブステアリング方式における前輪操舵機構 |
US17/754,470 US20230192226A1 (en) | 2019-10-04 | 2019-10-04 | Front wheel steering mechanism in center hub steering |
PCT/JP2019/039302 WO2021064983A1 (ja) | 2019-10-04 | 2019-10-04 | センターハブステアリング方式における前輪操舵機構 |
TW109133758A TWI747530B (zh) | 2019-10-04 | 2020-09-29 | 中心輪轂轉向方式之前輪轉向機構 |
Applications Claiming Priority (1)
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PCT/JP2019/039302 WO2021064983A1 (ja) | 2019-10-04 | 2019-10-04 | センターハブステアリング方式における前輪操舵機構 |
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WO2021064983A1 true WO2021064983A1 (ja) | 2021-04-08 |
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US (1) | US20230192226A1 (ja) |
JP (1) | JP6780193B1 (ja) |
TW (1) | TWI747530B (ja) |
WO (1) | WO2021064983A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0485101A (ja) * | 1990-07-25 | 1992-03-18 | Yamaha Motor Co Ltd | スポーク車輪構造 |
JP2002500133A (ja) * | 1998-01-05 | 2002-01-08 | シーカネ ベーフェー | ステアリングハブを備えたモーターサイクル |
WO2015033492A1 (ja) * | 2013-09-05 | 2015-03-12 | パナソニックIpマネジメント株式会社 | 自転車の車速検出装置および自転車 |
US20150307152A1 (en) * | 2012-12-13 | 2015-10-29 | Motor Cycle Innovation Pty Ltd | Vehicle steering system |
-
2019
- 2019-10-04 JP JP2020524419A patent/JP6780193B1/ja active Active
- 2019-10-04 US US17/754,470 patent/US20230192226A1/en active Pending
- 2019-10-04 WO PCT/JP2019/039302 patent/WO2021064983A1/ja active Application Filing
-
2020
- 2020-09-29 TW TW109133758A patent/TWI747530B/zh active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0485101A (ja) * | 1990-07-25 | 1992-03-18 | Yamaha Motor Co Ltd | スポーク車輪構造 |
JP2002500133A (ja) * | 1998-01-05 | 2002-01-08 | シーカネ ベーフェー | ステアリングハブを備えたモーターサイクル |
US20150307152A1 (en) * | 2012-12-13 | 2015-10-29 | Motor Cycle Innovation Pty Ltd | Vehicle steering system |
WO2015033492A1 (ja) * | 2013-09-05 | 2015-03-12 | パナソニックIpマネジメント株式会社 | 自転車の車速検出装置および自転車 |
Also Published As
Publication number | Publication date |
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TW202114901A (zh) | 2021-04-16 |
JP6780193B1 (ja) | 2020-11-04 |
JPWO2021064983A1 (ja) | 2021-10-28 |
TWI747530B (zh) | 2021-11-21 |
US20230192226A1 (en) | 2023-06-22 |
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