WO2018142752A1 - プッシュスイッチ - Google Patents

プッシュスイッチ Download PDF

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Publication number
WO2018142752A1
WO2018142752A1 PCT/JP2017/043525 JP2017043525W WO2018142752A1 WO 2018142752 A1 WO2018142752 A1 WO 2018142752A1 JP 2017043525 W JP2017043525 W JP 2017043525W WO 2018142752 A1 WO2018142752 A1 WO 2018142752A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed contact
central
contact
push switch
center
Prior art date
Application number
PCT/JP2017/043525
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
暢章 北村
秀隆 佐藤
尭也 坂本
Original Assignee
アルプス電気株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to KR1020197021413A priority Critical patent/KR102171896B1/ko
Priority to CN201780085007.XA priority patent/CN110291604B/zh
Priority to JP2018565964A priority patent/JP6965285B2/ja
Publication of WO2018142752A1 publication Critical patent/WO2018142752A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings

Definitions

  • the present invention relates to a push switch.
  • One of such push switches has a case where two fixed contact portions are integrated with a resin member, a movable contact, a sheet, and the like.
  • the two fixed contact portions are not in contact with the movable contact and are in an off state.
  • the two fixed contact portions are in contact with each other, and the two fixed contact portions are electrically connected via the movable contact to be turned on.
  • the case of such a push switch is formed by insert molding.
  • the case is formed by pouring and melting a molten resin material in a state where two fixed contact portions are pressed from above and below by a mold.
  • the lower sides of the two fixed contact portions are supported from below by pins, and the upper sides of the two fixed contact portions are formed by supplying a resin material while being pressed by the upper mold. Is done.
  • a through hole having a shape corresponding to the shape of the pin supported from below is formed below the two fixed contact portions in the resin member of the case formed by insert molding.
  • the upper part of the two fixed contact portions is exposed by a portion pressed by the upper mold.
  • the push switch manufactured in this way can be attached by soldering the external terminal of the fixed contact portion exposed from the case to an electrode terminal of an electronic device or the like.
  • the deformable movable contact made of metal, the central fixed contact portion, the peripheral fixed contact portion, and the resin member are integrated to form a recess into which the movable contact is inserted.
  • a surface of the central fixed contact portion and the peripheral fixed contact portion are exposed at the bottom surface of the concave portion of the case, and the central fixed contact portion is provided with a central contact,
  • An extending portion is provided around the center contact, and a through hole is formed in the resin member on the back surface side of the extending portion of the center fixed contact portion.
  • the flux when soldering, the flux can be prevented from reaching the surface of the fixed contact portion, and the reliability of the soldered push switch can be improved.
  • the X1-X2 direction, the Y1-Y2 direction, and the Z1-Z2 direction are directions orthogonal to each other.
  • a plane including the X1-X2 direction and the Y1-Y2 direction is referred to as an XY plane
  • a plane including the Y1-Y2 direction and the Z1-Z2 direction is referred to as a YZ plane
  • the Z1-Z2 direction and the X1-X2 direction are referred to as YZ plane.
  • the plane including the surface is referred to as a ZX plane.
  • the push switch in the present embodiment has a sheet 10, a movable contact 20, a case 30, and the like as shown in FIGS. 1 is an overall perspective view of the push switch according to the present embodiment, FIG. 2 is an exploded perspective view, FIG. 3 is a top view, and FIG. 4 is a side view.
  • the sheet 10 is formed of an insulating resin material such as nylon resin.
  • the movable contact 20 is made of a metal material such as stainless steel, and is deformed by being pushed from above via the sheet 10. In addition, silver plating or the like for enhancing conductivity is applied to the lower side of the movable contact 20.
  • the case 30 is formed by insert molding, and the central fixed contact portion 50 and the peripheral fixed contact portion 60 are integrated with the resin member 70.
  • This push switch has a substantially rectangular top surface as viewed from above, and has a longitudinal width W1 in the X1-X2 direction of about 3 mm and a short-side width W2 in the Y1-Y2 direction of about 1. 9 mm and the height H1 in the Z1-Z2 direction is about 0.55 mm.
  • the resin member 70 of the case 30 has a substantially rectangular top surface as viewed from above, a longitudinal width W3 corresponding to the X1-X2 direction is approximately 2.8 mm, and a lateral width in the Y1-Y2 direction. Is formed so that the width W2 in the short direction of the push switch is about 1.9 mm, and the height H2 in the Z1-Z2 direction is about 0.335 mm.
  • the center fixed contact portion 50 and the movable contact 20 are not in contact with each other and are in the off state when the center portion of the sheet 10 is not pressed.
  • the deformed movable contact 20 comes into contact with the central fixed contact portion 50 and the peripheral fixed contact portion 60 provided on the case 30.
  • the movable contact 20 is made of a metal material such as stainless steel, and the lower surface of the movable contact 20 is plated with highly conductive silver or the like. Accordingly, when the central fixed contact portion 50 and the peripheral fixed contact portion 60 provided on the case 30 come into contact with the lower surface of the movable contact 20, the central fixed contact portion 50 and the peripheral fixed contact are interposed via the movable contact 20.
  • the unit 60 is electrically connected and is turned on.
  • the center fixed contact portion 50 is formed by punching out a single metal plate and performing a process such as bending.
  • the central fixed contact portion 50 is connected to the central portion 50a where the first central contact 51 and the second central contact 52 are provided, and to the central portion 50a, and extends along the longitudinal direction, that is, the X1-X2 direction.
  • Terminal portions 53 and 54 are provided at both ends in the longitudinal direction of the connection portion 50b.
  • the first center contact 51 and the second center contact 52 are formed by processing in a convex shape upward (Z1 direction side), the X1-X2 direction is the longitudinal direction, and the Y1-Y2 direction is short. It is a hand direction.
  • the first center contact 51 and the second center contact 52 are formed to face each other in the Y1-Y2 direction.
  • the first center contact 51 is on the Y1 direction side
  • the second center contact 52 is on the Y2 direction.
  • An extended portion 50c is formed around the first central contact 51 and the second central contact 52 of the central portion 50a, and the X1-X2 direction which is the longitudinal direction of the push switch in the extended portion 50c
  • the extended support portions 55 and 56 are formed.
  • the extended support portion 55 is formed on the X1 direction side of the first center contact 51 and the second center contact 52.
  • the extended support portion 56 is formed on the X2 direction side of the first center contact 51 and the second center contact 52.
  • the distance from the first center contact 51 and the second center contact 52 to the end portion 55a of the extension support portion 55 or the end portion 56a of the extension support portion 56 is equal to the first center contact 51 and the second center contact. It is longer than the distance from 52 to the end of the other region of the central portion 50a of the central fixed contact portion.
  • the central portion 50 a of the central fixed contact portion 50 is provided with the first central contact 51 and the second central contact 52 and the extension formed around the first central contact 51 and the second central contact 52.
  • the extension support part 55 and the extension support part 56 are a part of the extension part 50c.
  • the center portion 50a of the central fixed contact portion 50 is fixed to the resin member 70 by insert molding. Portions 55b and 56b are formed.
  • the bent portion 55b formed in the vicinity of the end portion 55a of the extended support portion 55 is first bent in the vicinity of the end portion 55a of the extended support portion 55 in the Z2 direction along the Y1-Y2 direction.
  • the portion closer to the end 55a than this is formed by bending in the X1 direction along the Y1-Y2 direction.
  • the bent portion 56b formed in the vicinity of the end portion 56a of the extended support portion 56 is first formed by bending the vicinity of the end portion 56a of the extended support portion 56 in the Z2 direction along the Y1-Y2 direction. Further, a portion closer to the end portion 56a than this is bent in the X2 direction along the Y1-Y2 direction.
  • a portion between the first central contact 51 and the second central contact 52 is a concave portion 57, and the concave portion 57 extends in the X1-X2 direction.
  • an extended support portion 55 and an extended support portion 56 are formed at the tip of the X1-X2 direction. Therefore, the first center contact 51 and the second center contact 52 of the center fixed contact portion 50 are formed between the extended support portion 55 and the extended support portion 56.
  • the peripheral fixed contact portion 60 Similarly to the central fixed contact portion 50, the peripheral fixed contact portion 60 is also formed by punching one metal plate and processing it such as bending.
  • the peripheral fixed contact portion 60 is provided with a first peripheral contact 61 on the X1 direction side from the central portion 50a of the central fixed contact portion 50, and a second peripheral contact 62 on the X2 direction side. Is provided.
  • the peripheral fixed contact portion 60 is provided with a first peripheral contact 61 on the X1 direction side with respect to the extended support portion 55, and on the X2 direction side with respect to the extended support portion 56. Is provided with a second peripheral contact 62.
  • Terminal portions 63 and 64 are provided at both ends in the longitudinal direction of the peripheral fixed contact portion 60, that is, in the X1-X2 direction.
  • the 1st peripheral contact 61 and the 2nd peripheral contact 62 are formed by processing on the upper side (Z1 direction side) convex shape, the 1st peripheral contact 61, the 2nd peripheral contact 62, and a terminal
  • the parts 63 and 64 are connected by a connection part 65.
  • the case 30 is formed by insert molding using the center fixed contact portion 50 and the peripheral fixed contact portion 60.
  • a portion formed of a resin material in the case 30 formed by insert molding is referred to as a resin member 70.
  • the case 30 has a concave portion 31 formed on the upper side where the movable contact 20 is disposed, and a first central contact 51 and a second central contact 52 of the central fixed contact portion 50 are provided at the center of the bottom surface 31 a of the concave portion 31. A part of the extended support portions 55 and 56 is exposed.
  • the first peripheral contact 61 is exposed on the X1 direction side from the first central contact 51 and the second central contact 52, and on the X2 direction side.
  • the second peripheral contact 62 is exposed.
  • a part of the bent part 55b formed near the end part 55a of the extended support part 55 and a part of the bent part 56b formed near the end part 56a of the extended support part 56 are partially shown. Is embedded in the resin member 70.
  • the surface where the central fixed contact portion 50 is exposed in the recess 31 of the case 30 may be referred to as the front surface, and the surface covered with the resin member 70 on the opposite side to the front surface may be referred to as the back surface.
  • the surface of the concave portion 31 of the case 30 where the peripheral fixed contact portion 60 is exposed may be referred to as the front surface, and the surface covered with the resin member 70 on the opposite side to the front surface may be referred to as the back surface.
  • terminal portion 53 of the central fixed contact portion 50 and the terminal portion 63 of the peripheral fixed contact portion 60 are exposed on the X1 direction side on the back side of the case 30, and the central fixed contact portion 50 of the central fixed contact portion 50 is exposed on the X2 direction side.
  • the terminal portion 54 and the terminal portion 64 of the peripheral fixed contact portion 60 are exposed.
  • the movable contact 20 is placed in the concave portion 31 of the case 30 so as to be convex upward, and the top of the movable contact 20 is covered with the sheet 10. Yes.
  • a projection 11 is provided on the surface of the sheet 10 on the movable contact 20 side.
  • the movable contact 20 has a convex surface 20 a on the upper side and a concave surface 20 b on the lower side, and is disposed so that the concave surface 20 b of the movable contact 20 faces the bottom surface 31 a of the concave portion 31 of the case 30.
  • the peripheral portion 21 a around the movable contact 20 is in contact with the first peripheral contact 61 of the peripheral fixed contact portion 60, and the peripheral portion 21 b is in contact with the second peripheral contact 62 of the peripheral fixed contact portion 60.
  • the concave surface 20b of the movable contact 20 is an inner surface of the movable contact 20, and the concave surface 20b is plated with silver (not shown).
  • the movable contact 20 In the state in which the sheet 10 is not pushed, the movable contact 20 is not in contact with the first central contact 51 of the central fixed contact portion 50 and the like, as shown in FIG.
  • the first peripheral contact 61 and the second peripheral contact 62 are not electrically connected to the first central contact 51 and the like of the central fixed contact portion 50 and are in an off state.
  • This push switch is turned on by pressing the sheet 10 in the Z2 direction. That is, when the sheet 10 is pushed in the Z2 direction, the sheet 10 and the movable contact 20 are deformed, and the concave surface 20b of the central portion 22 of the movable contact 20 contacts the first central contact 51 of the central fixed contact portion 50 and the like. To do.
  • the first peripheral contact 61 and the second peripheral contact 62 of the peripheral fixed contact portion 60 and the first central contact 51 of the central fixed contact portion 50 are electrically connected via the movable contact 20 and turned on. It becomes a state.
  • the case 30 is formed by insert molding. Specifically, the center fixed contact portion 50 and the peripheral fixed contact portion 60 are supported by a die or the like on the front side and a pin on the back side. It is formed by pouring molten resin material. For this reason, as shown in FIG. 10, the back surface 32 of the case 30 has through holes 81 to 84 and openings 85 to 85 on the pins that have supported the central fixed contact portion 50 and the peripheral fixed contact portion 60 from the back surface side. 88 is formed. That is, through holes 81 to 84 and openings 85 to 88 are formed in the resin member 70 on the back surface side of the central fixed contact portion 50 and the peripheral fixed contact portion 60.
  • FIG 11 is a perspective view of the resin member 70 in a state where the central fixed contact portion 50 and the peripheral fixed contact portion 60 are removed from the case 30 formed by insert molding, as viewed from the front side.
  • the through holes 81 and 82 are formed on the back surface side of the central fixed contact portion 50, and the through holes 83 and 84 are formed on the back surface side of the peripheral fixed contact portion 60.
  • the through holes 81 and 82 are formed by pins that supported the central portion 50a of the central fixed contact portion 50 from the back side.
  • a through hole 83 is formed by a pin that supports the vicinity of the first peripheral contact 61 of the peripheral fixed contact portion 60 from the back surface side, and the vicinity of the second peripheral contact 62 of the peripheral fixed contact portion 60 indicates the back surface side.
  • the through hole 84 is formed by the pin that has been supported more.
  • openings 85 and 86 are formed by pins supporting the connection portion 50b of the central fixed contact portion 50 from the back surface side, and openings are formed by pins supporting the connection portion 65 of the peripheral fixed contact portion 60 from the back surface side. Portions 87 and 88 are formed.
  • the through hole 81 has a first stepped portion 81 a and a second stepped portion from the back surface 32 of the case 30 toward the back side of the extended support portion 55 of the central fixed contact portion 50.
  • the part 81b and the penetrating part 81c are formed in this order.
  • the first step portion 81a has a substantially rectangular shape with an outer shape of the bottom surface 81d of about 300 ⁇ m ⁇ 400 ⁇ m, and is formed so that the depth d1 is 20 ⁇ m to 30 ⁇ m.
  • the second step portion 81b is formed so that the outer shape of the bottom surface 81e is a substantially circular shape having a diameter of about 130 ⁇ m, and the depth d2 is 20 ⁇ m to 30 ⁇ m.
  • the penetrating portion 81c is formed in a substantially circular shape having a diameter of about 100 ⁇ m at the widest portion of the hole. As the distance from the back surface 32 of the case 30, the size of the hole becomes narrower, and the shape of the hole is tapered. It has become. Therefore, the through-hole 81 is formed in the first step portion 81a formed on the back surface 32 of the case 30 and the second step formed narrower than the first step portion 81a and deeper than the first step portion 81a.
  • the step portion 81b is formed by a through portion 81c formed at a position narrower than the second step portion 81b and deeper than the second step portion 81b.
  • the length of the shortest portion of the bottom surface 81d of the first step portion 81a between the first step portion 81a and the second step portion 81b of the through hole 81 (the shortest bottom surface of the bottom surface 81d).
  • the length L1 of the portion is formed to be longer than the depth d1 of the first step portion 81a.
  • the length L2 of the bottom surface 81e of the second step portion 81b between the second step portion 81b and the penetrating portion 81c (the length of the bottom surface portion of the bottom surface 81e) L2 is the depth of the second step portion 81b. It is formed to be longer than d2.
  • the length L1 of the shortest portion of the bottom surface 81d of the first step 81a between the first step 81a and the second step 81b is made longer than the depth d1 of the first step 81a.
  • the flux that has entered the first step portion 81a is difficult to reach the second step portion 81b, and even if the flux reaches, it takes time, so the flux that enters the second step portion 81b is reduced. Can do.
  • the length L2 of the bottom surface 81e of the second step portion 81b between the second step portion 81b and the penetrating portion 81c is made longer than the depth d2 of the second step portion 81b.
  • the flux that has entered the stepped portion 81b is less likely to reach the through portion 81c, and even if the flux reaches, it takes time, so the flux that enters the through portion 81c can be reduced.
  • the through hole 82 is the same as the through hole 81.
  • the length L1 of the shortest portion of the bottom surface 81d of the first step portion 81a between the first step portion 81a and the second step portion 81b is approximately 75 ⁇ m
  • the second step portion The length L2 of the bottom surface 81e of the second step portion 81b between the portion 81b and the penetrating portion 81c is formed to be about 25 ⁇ m.
  • FIG. 14 is a view of the case 30 that has passed through the resin member 70 as viewed from the back side in order to explain the positions of the through holes 81 and 82.
  • the through hole 81 is formed on the back side of the extended support portion 55 of the central portion 50 a of the central fixed contact portion 50
  • the through hole 82 is formed on the central portion 50 a of the central fixed contact portion 50. It is formed on the back side of the extended support portion 56.
  • the line connecting the through hole 81 and the through hole 82 passes between the first center contact 51 and the second center contact 52 of the center fixed contact portion 50. That is, the line connecting the center of the through hole 81 and the center of the through hole 82 indicated by the broken line A is parallel to the X1-X2 direction, and this line is connected to the first central contact 51 in the central fixed contact portion 50. It is located between the second central contact 52.
  • the flux is located between the back side of the central fixed contact portion 50 and the resin member 70 from the through hole 81, as shown by the broken line arrow B in FIG. 15. After turning around the gap to the left side, it goes around the end 55a, and if the gap between the front side of the center fixed contact portion 50 and the resin member 70 is not turned around to the right side, the first center contact 51 and the second center contact 51 The central contact 52 is not reached.
  • the flux forms a gap between the back side of the central fixed contact portion 50 and the resin member 70 from the through hole 82, as indicated by a broken line arrow C in FIG. 15.
  • the first central contact 51 or the second central contact is required unless it goes around the end portion 56a and then goes around the gap between the front side of the central fixed contact portion 50 and the resin member 70 to the left side. 52 is not reached.
  • the extended support portion 55 is a distance from the first central contact 51 or the second central contact 52 to the end portion 55a rather than the other portion of the central portion 50a of the central fixed contact portion 50. Is formed long. For this reason, even if flux enters, the approach path is long, and the flux cannot easily reach the first central contact 51 and the second central contact 52.
  • the extended support portion 56 is formed such that the distance from the first center contact 51 or the second center contact 52 to the end portion 56a is longer than the other portions of the center portion 50a of the center fixed contact portion 50. ing. For this reason, even if flux enters, the approach path is long, and the flux cannot easily reach the first central contact 51 and the second central contact 52.
  • a bent portion 55 b is formed in the vicinity of the end portion 55 a of the extended support portion 55. Since the bent portion 55b is formed by bending a metal plate, the bent portion 55b has a surface that is bent rather than flat. As described above, since the wetting and spreading of the flux is suppressed on the bent surface as compared with the flat surface, the flux can be prevented from reaching the first center contact 51 and the second center contact 52. Further, a bent portion 56 b is formed in the vicinity of the end portion 56 a of the extended support portion 56. Since the bent portion 56b is formed by bending a metal plate, the bent portion 56b has a bent surface rather than a flat surface. As described above, since the wetting and spreading of the flux is suppressed on the bent surface as compared with the flat surface, the flux can be prevented from reaching the first center contact 51 and the second center contact 52.

Landscapes

  • Push-Button Switches (AREA)
PCT/JP2017/043525 2017-02-02 2017-12-04 プッシュスイッチ WO2018142752A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020197021413A KR102171896B1 (ko) 2017-02-02 2017-12-04 푸시 스위치
CN201780085007.XA CN110291604B (zh) 2017-02-02 2017-12-04 按钮开关
JP2018565964A JP6965285B2 (ja) 2017-02-02 2017-12-04 プッシュスイッチ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017017945 2017-02-02
JP2017-017945 2017-02-02

Publications (1)

Publication Number Publication Date
WO2018142752A1 true WO2018142752A1 (ja) 2018-08-09

Family

ID=63039540

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/043525 WO2018142752A1 (ja) 2017-02-02 2017-12-04 プッシュスイッチ

Country Status (4)

Country Link
JP (1) JP6965285B2 (zh)
KR (1) KR102171896B1 (zh)
CN (1) CN110291604B (zh)
WO (1) WO2018142752A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024062651A1 (ja) * 2022-09-20 2024-03-28 アルプスアルパイン株式会社 スイッチおよびインサート成型方法

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Publication number Priority date Publication date Assignee Title
JPS5437323U (zh) * 1977-08-11 1979-03-12
JP2003234040A (ja) * 2002-02-07 2003-08-22 Alps Electric Co Ltd 押釦スイッチ
JP2010212172A (ja) * 2009-03-12 2010-09-24 Panasonic Corp プッシュオンスイッチ
WO2016136225A1 (ja) * 2015-02-27 2016-09-01 パナソニックＩｐマネジメント株式会社 スイッチケース及びスイッチ

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JPS55137412U (zh) * 1979-03-22 1980-09-30
JPS6123680A (ja) 1984-07-13 1986-02-01 Fuji Photo Film Co Ltd 放射線像変換方法およびその方法に用いられる放射線像変換パネル
JPS6314347A (ja) 1986-07-07 1988-01-21 Brother Ind Ltd 光磁気記録装置
JPH0756768A (ja) 1993-08-10 1995-03-03 Hitachi Ltd データ型対応の自動テスト方法
JP4180889B2 (ja) * 2002-11-15 2008-11-12 アルプス電気株式会社 押釦スイッチ
JP5923687B2 (ja) * 2012-03-15 2016-05-25 パナソニックＩｐマネジメント株式会社 プッシュスイッチ
JP2014154343A (ja) 2013-02-08 2014-08-25 Panasonic Corp プッシュスイッチ
CN203218145U (zh) * 2013-03-15 2013-09-25 苏州立泰电子有限公司 具有发光体的按钮开关
JP6439394B2 (ja) 2013-12-19 2018-12-19 ミツミ電機株式会社 スイッチの製造方法、およびスイッチ

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Publication number Priority date Publication date Assignee Title
JPS5437323U (zh) * 1977-08-11 1979-03-12
JP2003234040A (ja) * 2002-02-07 2003-08-22 Alps Electric Co Ltd 押釦スイッチ
JP2010212172A (ja) * 2009-03-12 2010-09-24 Panasonic Corp プッシュオンスイッチ
WO2016136225A1 (ja) * 2015-02-27 2016-09-01 パナソニックＩｐマネジメント株式会社 スイッチケース及びスイッチ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024062651A1 (ja) * 2022-09-20 2024-03-28 アルプスアルパイン株式会社 スイッチおよびインサート成型方法

Also Published As

Publication number Publication date
JPWO2018142752A1 (ja) 2019-06-27
CN110291604A (zh) 2019-09-27
JP6965285B2 (ja) 2021-11-10
CN110291604B (zh) 2021-11-30
KR20190091363A (ko) 2019-08-05
KR102171896B1 (ko) 2020-10-30

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