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WO2025100780A1 - Charnière à liaisons multiples - Google Patents

Charnière à liaisons multiples Download PDF

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Publication number
WO2025100780A1
WO2025100780A1 PCT/KR2024/015894 KR2024015894W WO2025100780A1 WO 2025100780 A1 WO2025100780 A1 WO 2025100780A1 KR 2024015894 W KR2024015894 W KR 2024015894W WO 2025100780 A1 WO2025100780 A1 WO 2025100780A1
Authority
WO
WIPO (PCT)
Prior art keywords
link hinge
axis
link
links
connecting member
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.)
Pending
Application number
PCT/KR2024/015894
Other languages
English (en)
Korean (ko)
Inventor
이두면
김세련
이노희
강모창
김지현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Segos Co Ltd
Original Assignee
Segos Co Ltd
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
Priority claimed from KR1020240009425A external-priority patent/KR102865105B1/ko
Application filed by Segos Co Ltd filed Critical Segos Co Ltd
Publication of WO2025100780A1 publication Critical patent/WO2025100780A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00—Additional features or accessories of hinges
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00—Additional features or accessories of hinges
    • E05D11/10—Devices for preventing movement between relatively-movable hinge parts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D3/00—Hinges with pins
    • E05D3/06—Hinges with pins with two or more pins
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D5/00—Construction of single parts, e.g. the parts for attachment
    • E05D5/02—Parts for attachment, e.g. flaps
    • E05D5/06—Bent flaps
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D7/00—Hinges or pivots of special construction
    • E05D7/04—Hinges adjustable relative to the wing or the frame

Definitions

  • the present invention relates to a multi-link hinge.
  • doors of kitchen furniture including electronic appliances are often doors that open and close by rotating around a hinge axis, and with the recent socioeconomic development and improvement in cultural standards, there is a trend toward using doors that offer improved convenience, aesthetics, and reliability.
  • multi-link hinges used in built-in drawers and home appliances are convenient to use because they open smoothly when the door is opened and can rotate as much as possible without affecting other adjacent products along with the load.
  • multi-link hinges have the advantage of improving the sealing when the door is closed and being attractive in appearance, so their use is gradually increasing.
  • a multi-link hinge is a product with a structure that combines sheet metal parts composed of multiple joints, and is applied to doors of home appliances, etc. to maximize space utilization of the door and enhance the aesthetic feel of the home appliance.
  • multi-link hinges have relatively long multiple links in order to extend as much as desired. Due to this necessity, gaps of different sizes are formed between the multiple links depending on the opening position of the hinge, and these gaps can be expanded or reduced when the door is operated. At this time, if the user's finger is inserted into the gap, there is a risk of injury to the user.
  • the present invention is to solve the problems of the prior art as described above, and an object of the present invention is to provide a multi-link hinge having improved consumer stability and operability, including a protective plate covering a space between a plurality of links and internal components and an adjustment unit adjusting the degree of elastic support of an elastic member.
  • one aspect of the present invention provides a multi-link hinge having a bottom lever, a top lever, and a plurality of links connecting the bottom lever and the top lever, wherein a protection plate is rotatably connected to one of the bottom lever and the top lever via a first axis and at least partially covers a space between the plurality of links which assume relative positions to each other according to the opening or closing of the multi-link hinge, and a connecting member having a first end rotatably connected to the protection plate via a second axis and a second end rotatably connected to one of the plurality of links via a third axis, the multi-link hinge including:
  • the connecting member may be a multi-link hinge, characterized in that it is positioned between the plurality of links and the protective plate and is not exposed to the outside.
  • the first axis, the second axis, and the third axis may be a multi-link hinge, characterized in that they are parallel to each other.
  • the multi-link hinge may be characterized in that the distance between the first axis and the second axis and the distance between the first axis and the third axis are greater than the distance between the second axis and the third axis.
  • the connecting member may be a multi-link hinge characterized in that the multi-link hinge rotates within a preset rotation radius range relative to the second axis during the process of operating from an open position to a closed position or from a closed position to an open position.
  • the connecting member may include a protrusion protruding toward the inner surface of the protecting plate, and the protecting plate may include a first stopper and a second stopper formed at one end and the other end of the preset rotation radius range, respectively, so as to prevent the connecting member from departing from the preset rotation radius range when rotating around the second axis, which may be a multi-link hinge.
  • the multi-link hinge may further include an elastic member that provides elastic force during an opening or closing operation of the multi-link hinge, a roller unit that is elastically supported by the elastic member and linearly moves with respect to the elastic member, and has a roller at one end, and a cam unit that presses the roller under the action of the elastic member during the opening or closing operation of the multi-link hinge.
  • a multi-link hinge may be provided, characterized in that it further includes an adjustment unit having an adjustment screw and being axially coupled with the cam unit, and as the adjustment screw is tightened or loosened, the adjustment unit interacts with the cam unit to move the cam unit closer to the roller or away from the roller.
  • the adjustment unit may be a multi-link hinge, characterized in that it is installed in a link different from the link on which the roller unit is installed.
  • One aspect of the present invention provides a multi-link hinge having a bottom lever, a top lever, and a plurality of links connecting the bottom lever and the top lever, a protection plate rotatably coupled to one of the bottom lever and the top lever via a first axis and at least partially covering a space between the plurality of links which assume relative positions to each other according to opening or closing of the multi-link hinge, a connecting member having a first end rotatably coupled to the protection plate via a second axis and a second end rotatably coupled to one of the plurality of links via a third axis, thereby connecting the protection plate and one of the plurality of links, wherein an elastic surface layer is formed on at least one surface of the protection plate to reduce operating noise of the multi-link hinge.
  • a multi-link hinge having improved consumer stability and ease of assembly can be provided by providing a protective plate that covers the space between a plurality of links and internal components.
  • the degree of elastic support provided by the spring unit during the opening or closing operation of the multi-link hinge can be adjusted by using the adjustment screw of the adjustment unit.
  • FIG. 1 is a drawing showing a multi-link hinge in a closed state according to one embodiment of the present invention.
  • FIG. 2 is a drawing showing the positions and connection relationships of a protective plate and a connecting member in a closed state according to one embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a multi-link hinge in a closed state according to one embodiment of the present invention.
  • FIG. 4 is a drawing showing a multi-link hinge in an open state according to one embodiment of the present invention.
  • FIG. 5 is a drawing showing the positions and connection relationships of a protective plate and a connecting member in an open state according to one embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a multi-link hinge in an open state according to one embodiment of the present invention.
  • Figures 7 (a) and (b) are drawings showing a state in which an adjustment screw of an adjustment unit is loosened and a state in which an adjustment screw of an adjustment unit is tightened, respectively, according to one embodiment of the present invention.
  • FIG. 8 is a perspective view of a multi-link hinge with the protective plate and connecting member separated according to one embodiment of the present invention.
  • FIGS. 9(a) and 9(b) are drawings showing the inner surface of a protective plate on which an elastic surface layer is not formed and the inner surface of a protective plate on which an elastic surface layer is formed, respectively, according to one embodiment of the present invention.
  • Figure 10 is a partially enlarged view of Figure 9.
  • Figures 11(a) and (b) are perspective and side views of a connecting member according to one embodiment of the present invention.
  • FIGS. 12(a) and 12(b) are drawings showing the movement of a connecting member in a closed state and an open state according to one embodiment of the present invention.
  • FIG. 1 is a drawing showing a multi-link hinge in a closed state according to an embodiment of the present invention
  • FIG. 2 is a drawing showing positions and connection relationships between a protection plate and a connecting member in a closed state according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view of a multi-link hinge in a closed state according to an embodiment of the present invention
  • FIG. 4 is a drawing showing a multi-link hinge in an open state according to an embodiment of the present invention
  • FIG. 5 is a drawing showing positions and connection relationships between a protection plate and a connecting member in an open state according to an embodiment of the present invention
  • FIG. 6 is a cross-sectional view of a multi-link hinge in an open state according to an embodiment of the present invention
  • FIG. 7 (a) and (b) are drawings showing a state in which an adjusting screw of an adjusting unit is loosened and a state in which an adjusting screw of an adjusting unit is tightened, respectively, according to an embodiment of the present
  • the multi-link hinge (1000) of the present invention includes a bottom lever (100), a top lever (200), a first link (300), a second link (400), a third link (500), and a fourth link (600).
  • the multi-link hinge (1000) is configured with a structure in which a plurality of links (300, 400, 500, 600) connect between the bottom lever (100) and the top lever (200).
  • This multi-link hinge (1000) can be applied to products such as built-in home appliances and furniture equipped with doors.
  • the bottom lever (100), the top lever (200) and the plurality of links (300, 400, 500, 600) are rotatably connected to each other so that the product's door can easily be operated from an open position to a closed position, or from a closed position to an open position, even in a narrow space.
  • the bottom lever (100) can be installed on the main body of a product equipped with a door, and has a first joint part (10) and a second joint part (11) formed spaced apart from each other.
  • the top lever (200) can be installed on a door that opens and closes the front of the main body, and has a third joint part (12) and a fourth joint part (13) that are formed spaced apart from each other.
  • the first link (300) has one end pivotally connected to the first joint part (10), and has a fifth joint part (14) formed on the other end and a sixth joint part (15) formed on the inner side.
  • the second link (400) is pivotally connected to the third joint part (12) and the fifth joint part (15), and has a seventh joint part (16) on the inner side.
  • the third link (500) is pivotally connected to the fourth joint part (13) and the fifth joint part (14).
  • the fourth link (600) is pivotally connected to the second joint part (11) and the seventh joint part (16).
  • the multi-link hinge (1000) may further include an elastic member (20), a roller unit (30), and a cam unit (40).
  • the multi-link hinge (1000) may further include an elastic member (20) that provides elasticity during the opening or closing operation of the multi-link hinge, a roller unit (30) that is elastically supported by the elastic member (20) and linearly moves relative to the elastic member (20), and has a roller (31) at one end thereof, and a cam unit (40) that presses the roller (31) under the action of the elastic member (20) during the opening or closing operation of the multi-link hinge (1000).
  • the elastic member (20) is installed in one of the plurality of links and provides elastic force so that the multi-link hinge (1000) is pushed to the closed position or the open position during the operation of the multi-link hinge (1000).
  • the elastic member (20) is configured so that one end is supported on the third link (500) and the other end is supported on the roller unit (30).
  • the elastic member (20) may be formed in a structure in which one end is supported by the third link (500) and the other end is supported by the head (30b) of the roller unit (30) in a form that is wound around the outer periphery of the extension (30a) of the roller unit (30).
  • This elastic member (20) may be in the form of a coil spring, and may be a compression spring or a tensile spring.
  • the roller unit (30) is configured to include an extension (30a) and a head (30b), the extension (30a) is connected to one of a plurality of links, preferably a third link (500), and the head (30b) may be provided with a roller (31) that interacts with a cam unit (40).
  • the roller unit (30) is configured to have a structure in which the head portion (30b) is elastically supported on the elastic member (20) and is linearly movable relative to the elastic member (20).
  • a first guide hole (32) in the form of a hole may be formed in the head portion (30b) of the roller unit (30), and a first guide protrusion (33) fixed to one of a plurality of links, preferably a third link (500), may be inserted into the first guide hole (32).
  • the first guide hole (32) and the first guide protrusion (300) may guide the linear movement of the roller unit (30) during the opening or closing operation of the multi-link hinge (1000).
  • the cam unit (40) can be connected to the first link (300) through one of the plurality of links, preferably the fifth joint (14), and can press the roller (31) under the action of the elastic member (20) during the opening or closing operation of the multi-link hinge (1000).
  • the roller contact surface (41) of the cam unit (40) comes into contact with the roller (31) of the roller unit (30) to press the roller unit (30), thereby compressing or tensioning the elastic member (20).
  • roller unit (30) interacts with the cam unit (40) while being elastically supported by the elastic member (20), and the roller (31) rotates along the outer surface of the cam unit (40).
  • the multi-link hinge (1000) may further include an adjustment unit (50).
  • the adjustment unit (50) may be installed on one of the plurality of links, preferably the first link (300), and may be coupled to the cam unit (40) via a connecting shaft (51). That is, the adjustment unit (50) is installed on a different link from the link on which the roller unit (30) is mounted.
  • a convex surface (52) corresponding to the shape of the concave surface (44) of the cam unit (40) may be partially formed on the outer periphery of the adjustment unit (50).
  • the adjustment unit (50) is provided with an adjustment screw (53), and a portion of the adjustment screw (53) is exposed to the outside of the first link (300) so that it can be adjusted by the user. That is, when the adjustment screw (53) is tightened or loosened, the adjustment unit (50) connected to the adjustment screw (53) by a screw structure is configured to move in one direction toward the adjustment screw (53) or in the other direction away from the adjustment screw (53).
  • the adjustment unit (50) can interact with the cam unit (40) to move the cam unit (40) closer to the roller unit (30) when the adjustment screw (53) is tightened, and can interact with the cam unit (40) to move the cam unit (40) away from the roller unit (30) when the adjustment screw (53) is loosened.
  • the adjustment unit (50) and the cam unit (40) are connected through the connecting shaft (51), and the convex surface (52) of the adjustment unit (50) and the concave surface (44) of the cam unit (40) are in rotatably contacting shape corresponding to each other. That is, when the adjusting screw (53) is tightened, the adjustment unit (50) moves toward the cam unit (40), and the cam unit (40) moves closer to the roller (31) while rotating along the convex surface (52) centered on the connecting shaft (51) (clockwise with reference to FIG. 7).
  • the adjustment unit (50) may interact with the cam unit (40) to move the cam unit (40) away from the roller unit (30) when the adjustment screw (53) is tightened, and may interact with the cam unit (40) to move the cam unit (40) closer to the roller unit (30) when the adjustment screw (53) is loosened.
  • the adjustment unit (50) and the cam unit (40) are connected through the connecting shaft (51), and the convex surface (52) of the adjustment unit (50) and the concave surface (44) of the cam unit (40) are in rotatably contacting shape corresponding to each other. That is, when the adjusting screw (53) is loosened, the adjustment unit (50) moves toward the cam unit (40), and the cam unit (40) moves closer to the roller (31) while rotating along the convex surface (52) centered on the connecting shaft (51) (clockwise with reference to FIG. 7).
  • a second guide hole (42) in the form of a long hole may be formed in the cam unit (40), and a second guide protrusion (43) may be inserted into the second guide hole (42).
  • the second guide hole (42) and the second guide protrusion (43) may guide the rotation of the cam unit (40) during the operation of the adjustment screw (53).
  • the second guide protrusion (43) may be a fifth joint part (14) connecting the first link (300) and the third link (500).
  • the degree of elastic support provided by the elastic member (20) during the opening or closing operation of the multi-link hinge (1000) can be adjusted by using the adjustment screw (53) of the adjustment unit (50).
  • FIG. 8 is a perspective view of a multi-link hinge in which a protection plate and a connecting member are separated according to an embodiment of the present invention
  • FIG. 9 are drawings showing an inner surface of a protection plate on which an elastic surface layer is not formed and an inner surface of a protection plate on which an elastic surface layer is formed, respectively, according to an embodiment of the present invention
  • FIG. 10 is a partial enlarged view of FIG. 9, and (a) and (b) of FIG. 11 are a perspective view and a side view of a connecting member according to an embodiment of the present invention, and (a) and (b) of FIG. 12 are drawings showing movements of the connecting member in a closed state and an open state according to an embodiment of the present invention.
  • the multi-link hinge (1000) of the present invention may further include a protection plate (700) and a connecting member (800).
  • the multi-link hinge (1000) of the present invention comprises a protection plate (700) that is rotatably coupled to one of the bottom lever (100) and the top lever (200), preferably the bottom lever (100), via a first axis (17), and at least partially covers a space between a plurality of links (300, 400, 500, 600) that assume relative positions to each other depending on the opening or closing of the multi-link hinge (1000), and a connecting member (800) that has a first end (810) that is rotatably coupled to the protection plate (700) via a second axis (18) and a second end (820) that is rotatably coupled to one of the plurality of links via a third axis (19), thereby connecting the protection plate (700) and one of the plurality of links.
  • a protection plate (700) that is rotatably coupled to one of the bottom lever (100) and the top lever (200), preferably the bottom lever (100), via a first axis (17), and at least partially covers a space between
  • a protection plate (700) can be installed on at least one of the two sides of the multi-link hinge (1000).
  • a gap may be formed between the multiple links (300, 400, 500, 600).
  • the protection plate (700) can cover this gap to prevent the risk of the user's finger being inserted into the gap and getting injured.
  • the connecting member (800) is rotatably coupled to the protection plate (700) via the second axis (18) and rotatably coupled to one of the plurality of links, preferably the third link (500), via the third axis (19), thereby connecting the protection plate (700) and one of the plurality of links.
  • the connecting member (800) is connected to the protection plate (700) via the second axis (18) so that the protection plate (700) does not move away from the multiple links when the protection plate (700) rotates around the first axis (17) during the operation of the multi-link hinge (1000), and is connected to the third link (500) via the third axis (19), thereby allowing the protection plate (700) to continuously cover the space between the multiple links.
  • These connecting members (800) may be positioned between the plurality of links and the protecting plate (700), i.e., on the inside of the protecting plate (700), so as not to be exposed to the outside.
  • the first end (810) of the connecting member (800) to which the second shaft (18) is connected may be in a form that protrudes toward the protecting plate (700) so that a predetermined gap may be formed between the protecting plate (700) and the connecting member (800)
  • the second end (820) of the connecting member (800) to which the third shaft (19) is connected may be in a form that protrudes toward the third link (500) so that a predetermined gap may be formed between the third link (500) and the connecting member (800).
  • the connecting member (800) rotates within a preset rotation radius range (R) about the second axis (18) during the process in which the multi-link hinge (1000) operates from an open position to a closed position or from a closed position to an open position.
  • the connecting member (800) includes a protrusion (830) protruding toward the inner surface of the protecting plate (700), and the protecting plate (700) may include a first stopper (710) and a second stopper (720) formed at one end and the other end of a preset rotation radius range (R) on the inner surface, respectively. Accordingly, during the opening or closing operation of the multi-link hinge (1000), the connecting member (800) may be prevented from exceeding the preset rotation radius range (R) when rotating around the second axis (18).
  • the protection plate (700) may further be formed with a circular reinforcing member (730) formed along the second axis (18) to reinforce strength.
  • This reinforcing member (730) may be provided on the inner surface of the protection plate (700) and may be connected to the first stopper (710) and the second stopper (720).
  • a protective plate (700') may have an elastic surface layer (740) formed on at least one surface to reduce operating noise of a multi-link hinge (1000).
  • the elastic surface layer (740) may be formed by spraying a liquid elastic material, preferably a liquid urethane material, onto one surface of the protection plate (700'), but the elastic material and the application method are not limited thereto.
  • the elastic surface layer (740) may preferably be formed on the inner surface of the protection plate (700'), and as the elastic surface layer (740) is formed on the protection plate (700'), the operating noise of the multi-link hinge (1000) may be reduced.
  • the multi-link hinge (1000) of the present invention can improve consumer safety and ease of assembly by having a protective plate (700) that covers the space between multiple links and internal components and a connecting member (800) that assists the operation of the protective plate (700).
  • the multi-link hinge (1000) of the present invention can adjust the degree of elastic support by the elastic member (20) when the multi-link hinge (1000) is opened or closed by using the adjustment screw (53) of the adjustment unit (50).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hinges (AREA)

Abstract

Un mode de réalisation de la présente invention concerne une charnière à liaisons multiples comprenant : un levier inférieur ; un levier supérieur ; et une pluralité de liaisons reliant le levier inférieur et le levier supérieur. La charnière à liaisons multiples comprend : une plaque de protection qui est accouplée rotative à un élément parmi le levier inférieur ou le levier supérieur par l'intermédiaire d'un premier arbre et qui recouvre au moins en partie l'espace entre la pluralité de liaisons qui adoptent des positions les unes par rapport aux autres selon que la charnière à liaisons multiples est ouverte ou fermée ; et un élément de liaison qui comporte une première partie d'extrémité accouplée rotative à la plaque de protection par l'intermédiaire d'un deuxième arbre et une seconde partie d'extrémité accouplée rotative à une liaison parmi la pluralité de liaisons par l'intermédiaire d'un troisième arbre et qui relie la plaque de protection et ladite liaison parmi la pluralité de liaisons.
PCT/KR2024/015894 2023-11-06 2024-10-18 Charnière à liaisons multiples Pending WO2025100780A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2023-0152021 2023-11-06
KR20230152021 2023-11-06
KR10-2024-0009425 2024-01-22
KR1020240009425A KR102865105B1 (ko) 2023-11-06 2024-01-22 멀티링크 힌지

Publications (1)

Publication Number Publication Date
WO2025100780A1 true WO2025100780A1 (fr) 2025-05-15

Family

ID=95695711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2024/015894 Pending WO2025100780A1 (fr) 2023-11-06 2024-10-18 Charnière à liaisons multiples

Country Status (1)

Country Link
WO (1) WO2025100780A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070101298A (ko) * 2005-02-02 2007-10-16 헷티히-오니 게엠베하 운트 코. 카게 멀티 링크 힌지
KR20200077890A (ko) * 2018-12-21 2020-07-01 주식회사 다이아벨 다단 링크 힌지 장치 및 이를 포함하는 전자기기
US11021901B2 (en) * 2016-12-05 2021-06-01 Hettich-Oni Gmbh & Co. Kg Multi-joint hinge
KR20230010541A (ko) * 2021-07-12 2023-01-19 (주)세고스 멀티링크 힌지
KR20230071815A (ko) * 2021-11-15 2023-05-24 서원코리아 주식회사 모터타입 멀티 힌지
KR102563032B1 (ko) * 2023-05-19 2023-08-03 서원코리아 주식회사 멀티링크 힌지

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070101298A (ko) * 2005-02-02 2007-10-16 헷티히-오니 게엠베하 운트 코. 카게 멀티 링크 힌지
US11021901B2 (en) * 2016-12-05 2021-06-01 Hettich-Oni Gmbh & Co. Kg Multi-joint hinge
KR20200077890A (ko) * 2018-12-21 2020-07-01 주식회사 다이아벨 다단 링크 힌지 장치 및 이를 포함하는 전자기기
KR20230010541A (ko) * 2021-07-12 2023-01-19 (주)세고스 멀티링크 힌지
KR20230071815A (ko) * 2021-11-15 2023-05-24 서원코리아 주식회사 모터타입 멀티 힌지
KR102563032B1 (ko) * 2023-05-19 2023-08-03 서원코리아 주식회사 멀티링크 힌지

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