CN109028734B - A kind of refrigerator - Google Patents

A kind of refrigerator Download PDF

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Publication number
CN109028734B
CN109028734B CN201810488878.2A CN201810488878A CN109028734B CN 109028734 B CN109028734 B CN 109028734B CN 201810488878 A CN201810488878 A CN 201810488878A CN 109028734 B CN109028734 B CN 109028734B
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CN
China
Prior art keywords
hinge
hinge shaft
piece
mounting
distance
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CN201810488878.2A
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Chinese (zh)
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CN109028734A (en
Inventor
杨春
张�浩
纪璇
夏恩品
王磊
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.)
Haier Smart Home Co Ltd
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Haier Smart Home 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
Application filed by Haier Smart Home Co Ltd filed Critical Haier Smart Home Co Ltd
Priority to CN201810488878.2A priority Critical patent/CN109028734B/en
Priority to CN202110976692.3A priority patent/CN113668969B/en
Publication of CN109028734A publication Critical patent/CN109028734A/en
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Publication of CN109028734B publication Critical patent/CN109028734B/en
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    • 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
    • E05D7/08—Hinges or pivots of special construction for use in suspensions comprising two spigots placed at opposite edges of the wing, especially at the top and the bottom, e.g. trunnions
    • E05D7/081—Hinges or pivots of special construction for use in suspensions comprising two spigots placed at opposite edges of the wing, especially at the top and the bottom, e.g. trunnions the pivot axis of the wing being situated near one edge of the wing, especially at the top and bottom, e.g. trunnions
    • 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
    • E05D7/0009—Adjustable hinges
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/12—Mechanisms in the shape of hinges or pivots, operated by springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
    • E05Y2900/31—Application of doors, windows, wings or fittings thereof for domestic appliances for refrigerators

Abstract

The invention provides a refrigerator, which comprises a refrigerator body, a door body and a hinge assembly, wherein the hinge assembly comprises a hinge and a hinge shaft, a mounting long groove is formed in the hinge, the refrigerator also comprises an adjusting assembly, the adjusting assembly comprises a stop block which is fixed on the hinge and positioned at one end of the mounting long groove, a rotating piece which is mounted on the hinge shaft and rotates along with the hinge shaft, and an elastic piece of which the rear end is fixed on the hinge and the front end is rotatably connected with the hinge shaft so that the outer contour of the rotating piece is always in contact with the stop block, and the automatic door closing of the refrigerator door body and the maximum door opening angle of the door body are controlled through the matching of the mounting long groove, the stop block, the rotating piece and the elastic piece.

Description

A kind of refrigerator
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator capable of automatically closing a door and controlling a maximum door opening angle.
Background
The existing refrigerator comprises a refrigerator body, a door body and a hinge assembly which is pivoted with the door body and the refrigerator body. The door body is opening the back, if the user forgets to close the door, then the door body can be in the open mode all the time, not only causes the energy waste and influences the cold-stored or freezing effect of refrigerator. On the other hand, the door body can be opened to any angle, so the door body is easy to collide with surrounding objects in the using process, the door body is damaged, and the use is very inconvenient.
In view of the above, there is a need for an improved refrigerator to solve the above problems.
Disclosure of Invention
The invention aims to provide a refrigerator, which can realize automatic door closing of a refrigerator door body and control the maximum door opening angle of the door body.
In order to achieve the aim, the invention provides a refrigerator, which comprises a refrigerator body, a door body and a hinge assembly pivoted with the door body and the refrigerator body, the hinge assembly comprises a hinge fixed on the box body and a hinge shaft with one end fixed with the door body and the other end rotatably connected with the hinge, the hinge is provided with a mounting long groove for the hinge shaft to pass through, the refrigerator also comprises an adjusting component, the adjusting component comprises a stop block fixed on the hinge and positioned at one end of the long mounting groove, a rotating piece arranged on the hinge shaft and rotating along with the hinge shaft, an elastic piece with one end fixed on the hinge and the other end rotationally connected with the hinge shaft so as to enable the outer profile of the rotating piece to be always contacted with the stop block, when the door body is closed, the hinge shaft is positioned at one end of the mounting long groove close to the stop block, and the position where the outer contour of the rotating part is contacted with the stop block is a first position; when the door body rotates to the maximum angle, the hinge shaft is positioned at one end of the long mounting groove far away from the stop block, and the position where the outer contour of the rotating part is contacted with the stop block is a second position; the outer contour of the rotating part is also provided with a third position which is positioned on one side of the second position, which is far away from the first position; the first distance between the first position and the hinge shaft is smaller than the second distance between the second position and the hinge shaft, the distance between any position between the first position and the second position and the hinge shaft is larger than the first distance and smaller than the second distance, the second distance is smaller than the third distance between the third position and the hinge shaft, and the distance between any position between the second position and the third position and the hinge shaft is larger than the second distance; the difference between the second distance and the first distance is equal to the distance of the length of the long mounting groove in the direction close to or far away from the stop minus the diameter of the hinge shaft.
As a further improvement of the present invention, the adjusting assembly further includes a first adjusting structure for adjusting the length of the mounting long slot, the first adjusting structure includes an adjusting piece mounted at one end of the mounting long slot, and a mounting structure for fixing the adjusting piece at any position in the length direction of the mounting long slot, and the mounting structure has a released state for releasing the adjusting piece to move in the length direction of the mounting long slot and a fixed state for fixing the adjusting piece in the mounting long slot.
As a further improvement of the present invention, the mounting elongated slot is a waist-shaped slot, and the waist-shaped slot extends in the front-rear direction.
As a further improvement of the invention, the diameter of the hinge shaft is equal to the width of the mounting slot.
As a further improvement of the present invention, the adjusting assembly further includes a second adjusting structure for adjusting an included angle between the first position and the second position, the second adjusting structure includes a plurality of replacing rotating members, and a fixing structure for detachably mounting the rotating members and the replacing rotating members on the hinge shaft, and the plurality of replacing rotating members have different outer profiles so as to form different included angles between the first position and the second position after the plurality of replacing rotating members are mounted.
As a further improvement of the invention, the hinge assembly further comprises a gasket which is sleeved on the hinge shaft and is positioned between the hinge and the door body.
As a further improvement of the present invention, the stopper is located at the front side of the hinge, the rear end of the elastic member is fixed on the hinge, the front end of the elastic member is rotatably connected to the hinge shaft, and when the door body is closed, the elastic member is in a free state or a compressed state.
As a further improvement of the present invention, the elastic member includes a connecting end located on the front side, a fixing end located on the rear side, and an elastic member body located between the connecting end and the fixing end.
As a further improvement of the invention, the connecting end comprises a lantern ring sleeved on the hinge shaft and a first connecting rod for connecting the lantern ring and the elastic element body; the adjusting assembly further comprises a base fixedly mounted with the hinge, a mounting shaft is arranged on the base, and a mounting hole fixedly mounted with the mounting shaft is formed in the fixed end; the elastic piece body is a spring.
As a further improvement of the present invention, an outer contour of the rotating member is an ellipse, and when the door body is closed, a position of the rotating member closest to the hinge shaft is a first position.
The invention has the beneficial effects that: according to the refrigerator, the installation long groove, the stop block, the rotating piece and the elastic piece are arranged, in the opening process of the door body, the outer contour of the rotating piece is always in contact with the stop block, so that the hinge shaft moves close to or away from the stop block in the installation long groove, the elastic piece deforms, force for closing the door is applied to the door body, the door body is automatically closed, the door body is ensured to be closed, and energy consumption and the refrigeration or freezing effect of the refrigerator are prevented from being influenced; the length of the long mounting groove and the outer contour of the rotating piece control the maximum angle of the rotating piece, so that the maximum angle of the door body is controlled, the structure is simple, and the use is convenient.
Drawings
FIG. 1 is a schematic structural view of a refrigerator according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic structural view of a hinge of the refrigerator shown in FIG. 1;
fig. 4 is a schematic structural view of a rotating member of the refrigerator of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, a refrigerator 100 of the present invention includes a cabinet 1, a door 2, a hinge assembly 3, and an adjustment assembly 4.
The hinge assembly 3 is pivoted with the door body 2 and the box body 1, and the hinge assembly 3 comprises a hinge 31 fixed on the box body 1, a hinge shaft 32 with one end fixed with the door body 2 and the other end rotatably connected with the hinge 31, and a gasket sleeved on the hinge shaft 32 and positioned between the hinge 31 and the door body 2. The hinge 31 is provided with a long installation groove 33 for the hinge shaft 32 to pass through so as to realize the rotary connection between the hinge shaft 32 and the hinge 31.
The adjusting assembly 4 includes a stopper 41 fixed on the hinge 31 and located at one end of the long mounting groove 33, a rotating member 42 mounted on the hinge shaft 32 and rotating with the hinge shaft 32, an elastic member 43 having one end fixed on the hinge 31 and the other end rotatably connected to the hinge shaft 32 so that the outer profile of the rotating member 42 is always in contact with the stopper 41, a first adjusting structure (not shown), and a second adjusting structure (not shown).
When the door body 2 is closed, the hinge shaft 32 is located at one end of the long mounting groove 33 close to the stop block 41, and the position where the outer profile of the rotating member 42 contacts the stop block 41 is a first position 421; when the door body 2 rotates to the maximum angle, the hinge shaft 32 is located at one end of the long mounting groove 33 away from the stop block 41, and the position where the outer profile of the rotating part 42 contacts the stop block 41 is the second position 422; the outer contour of the rotary member 42 also has a third position on the side of the second position facing away from the first position. That is, the first position, the second position, and the third position are sequentially arranged on the outer contour of the rotating member 42.
A first distance from the first position to the hinge axis 32 is smaller than a second distance from the second position to the hinge axis 32, a distance from any position between the first position and the second position to the hinge axis 32 is smaller than the second distance and larger than the first distance, a second distance is smaller than a third distance from the third position to the hinge axis 32, and a distance from any position between the second position and the third position to the hinge axis 32 is larger than the second distance; the difference between the second distance and the first distance is equal to the length of the mounting elongated slot 33 in the front-rear direction minus the diameter of the hinge shaft 32.
As the door body 2 is opened, the rotating member 42 rotates along with the rotation of the hinge shaft 32, so that the position of the outer contour of the rotating member 42 contacting the stopper 41 is changed from the first position to a position located at one of the first position and the second position, and since the distance from the position to the stopper 41 is greater than the first distance, the contact of the rotating member 42 and the stopper 41 moves the hinge shaft 32 in the mounting long groove 33 in the direction away from the stopper 41, and the elastic member 43 is deformed, so that the elastic member 43 applies a restoring force to the hinge shaft 32, and the rotating member 42 is restored to the position where the first position contacts the stopper 41, thereby achieving the automatic door closing of the door body 2.
The length of the long mounting groove 33 in the direction close to or away from the stopper 41 minus the diameter of the hinge shaft 32 is the distance that the hinge shaft 32 can move in the long mounting groove 33, so that after the distance from the outer contour of the rotating member 42 to the hinge shaft 32 is equal to the sum of the first distance and the distance that the hinge shaft can move, the hinge shaft 32 cannot move any more, and therefore the rotating member 42 cannot rotate any more, so that the hinge shaft 32 cannot rotate any more, and the door body 2 cannot be opened any more after being opened to the angle, which is the maximum door opening angle. The angle of the rotating member 42 which can rotate is controlled by the movable distance of the hinge shaft 32 in the long mounting groove 33 and the outer contour of the rotating member 42, so that the maximum door opening angle of the door body 2 is controlled, the structure is simple, and the use is convenient. The third position is used to limit the rotation of the rotating member 42 to the second position even if the door 2 is fixed at the maximum door opening angle.
In this embodiment, the long mounting groove 33 is a waist-shaped groove extending in the front-back direction, and the diameter of the hinge shaft 32 is equal to the width of the long mounting groove 33. The stopper 41 is located on the front or rear side of the mounting long groove 33. Specifically, the stopper 41 is located at the front side of the long mounting groove 33, the rear end of the elastic member 43 is fixed on the hinge 31, and the front end is rotatably connected to the hinge shaft 32. The outer contour of the rotor 42 is oval.
When the door body 2 is closed, the hinge shaft 32 is located at the front side of the long mounting groove 33, the elastic member 43 is in a free state or a compressed state, and a position, closest to the hinge shaft 32, of the rotating member 42 is in contact with the stopper 41 to form a first position. As the door 2 is opened, the rotating member 42 contacts the stopper 41, and the hinge shaft 32 moves backwards in the installation long groove 33, so as to compress the elastic member 43, so that the elastic member 43 applies a forward movement force to the hinge shaft 32, thereby ensuring that the refrigerator 100 can be automatically closed. When the hinge shaft 32 moves backward to the rear side of the long mounting groove 33 away from the stopper 41, the hinge shaft cannot move backward, the rotating member 42 cannot rotate further, so that the hinge shaft 32 cannot rotate, and the door body 2 stays at the door opening angle, which is the maximum door opening angle, and the position where the rotating member 42 contacts the stopper 41 at this time is the second position. At this time, the door body 2 is released, and the elastic member 43 applies a forward force to the hinge shaft 32, so that the hinge shaft 32 moves forward, and the rotating member 42 is driven to rotate, so as to drive the hinge shaft 32 to rotate, thereby realizing automatic door closing.
The elastic member 43 includes a connecting end 431 at the front side, a fixing end 433 at the rear side, and an elastic member body 432 between the connecting end 431 and the fixing end 433. The connecting end 431 comprises a lantern ring 4311 sleeved on the hinge shaft 32 and a first connecting rod 4312 connecting the lantern ring 4311 and the elastic piece body 432; the adjusting assembly 4 further comprises a base 44 fixedly mounted with the hinge 31, a mounting shaft 441 is arranged on the base 44, and a mounting hole fixedly mounted with the mounting shaft 441 is formed in the fixed end 433; the elastic member body 432 is a spring, and the structure is simple and reliable.
The first adjusting structure adjusts the length of the long mounting groove 33 in the direction approaching or departing from the stop 41, and changes the distance that the hinge shaft 32 can move in the long mounting groove 33, so as to change the second position, and change the maximum door opening angle of the door body 2. The first adjusting structure comprises an adjusting piece mounted at one end of the mounting long groove 33 and a mounting structure for fixing the adjusting piece at any position of the mounting long groove in the length direction of the mounting long groove 33, and the mounting structure has a loosening state for loosening the adjusting piece to enable the adjusting piece to move in the length direction of the mounting long groove and a fixing state for fixing the adjusting piece in the mounting long groove.
The second adjusting structure adjusts an included angle between the first position and the second position to change the maximum door opening angle of the door body. The second is adjusted the structure and is included that a plurality of replacements rotate the piece, will rotate the piece and replace and rotate the piece with hinge pin 32 demountable installation's fixed knot constructs, and is a plurality of the replacement rotates the piece and has different outline so that it is a plurality of the installation of replacement rotation is accomplished the back the primary importance with different contained angles have between the second place. The first position and the second position with different included angles are obtained by using the replacing rotating pieces with different outer profiles so as to adjust the maximum door opening angle of the door body.
In summary, in the refrigerator 100 of the present invention, by providing the installation long groove 33, the stopper 41, the rotating member 42, and the elastic member 43, in the opening process of the door body 2, the outer contour of the rotating member 42 is always in contact with the stopper 41, so that the hinge shaft 32 moves in the installation long groove 33 close to or away from the stopper 41, and the elastic member 43 deforms, so as to apply a force for closing the door body 2, thereby automatically closing the door body 2, ensuring the closing of the door body 2, and avoiding energy consumption and influencing the refrigeration or freezing effect of the refrigerator 100; the length of the long installation groove 33 and the outer contour of the rotating piece 42 control the maximum angle of the rotating piece 42, so that the maximum angle of the door body 2 is controlled, the structure is simple, and the use is convenient.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (9)

1. The utility model provides a refrigerator, includes box, door body, pin joint the door body with the hinge subassembly of box, the hinge subassembly is including fixing hinge, one end on the box and fixed with the door body and the other end with the hinge pin of hinge rotation connection, its characterized in that: the hinge is provided with a mounting long groove for the hinge shaft to pass through, the refrigerator also comprises an adjusting component,
the adjusting component comprises a stop block fixed on the hinge and positioned at one end of the long mounting groove, a rotating piece arranged on the hinge shaft and rotating along with the hinge shaft, an elastic piece with one end fixed on the hinge and the other end rotationally connected with the hinge shaft so as to enable the outer profile of the rotating piece to be always contacted with the stop block,
when the door body is closed, the hinge shaft is positioned at one end of the mounting long groove close to the stop block, and the position where the outer contour of the rotating part is contacted with the stop block is a first position; when the door body rotates to the maximum angle, the hinge shaft is positioned at one end of the long mounting groove far away from the stop block, and the position where the outer contour of the rotating part is contacted with the stop block is a second position; the outer contour of the rotating part is also provided with a third position which is positioned on one side of the second position, which is far away from the first position;
the first distance between the first position and the hinge shaft is smaller than the second distance between the second position and the hinge shaft, the distance between any position between the first position and the second position and the hinge shaft is larger than the first distance and smaller than the second distance, the second distance is smaller than the third distance between the third position and the hinge shaft, and the distance between any position between the second position and the third position and the hinge shaft is larger than the second distance;
the difference value of the second distance and the first distance is equal to the distance obtained by subtracting the diameter of the hinge shaft from the length of the long mounting groove in the direction close to or far away from the stop block;
the stop block is positioned on the front side of the hinge, the rear end of the elastic piece is fixed on the hinge, the front end of the elastic piece is rotationally connected with the hinge shaft, and when the door body is closed, the elastic piece is in a free state or a compressed state.
2. The refrigerator according to claim 1, wherein: the adjusting assembly further comprises a first adjusting structure for adjusting the length of the mounting long groove, the first adjusting structure comprises an adjusting piece mounted at one end of the mounting long groove, and a mounting structure for fixing the adjusting piece at any position in the length direction of the mounting long groove, and the mounting structure has a loosening state for loosening the adjusting piece to enable the adjusting piece to move in the length direction of the mounting long groove and a fixing state for fixing the adjusting piece in the mounting long groove.
3. The refrigerator according to claim 1, wherein: the long mounting groove is a waist-shaped groove which extends along the front-back direction.
4. The refrigerator according to claim 1, wherein: the diameter of the hinge shaft is equal to the width of the long mounting groove.
5. The refrigerator according to claim 1, wherein: the adjusting part is still including being used for adjusting the first position with the second of contained angle between the second position is adjusted the structure, the second is adjusted the structure and is included a plurality of replacements and rotates piece, will rotate piece and replacement rotate piece with hinge pin demountable installation's fixed knot constructs, and is a plurality of the replacement rotates the piece and has different outline so that it is a plurality of the replacement rotates the piece installation and accomplishes the back the first position with different contained angles have between the second position.
6. The refrigerator according to claim 1, wherein: the hinge assembly further comprises a gasket which is sleeved on the hinge shaft and located between the hinge and the door body.
7. The refrigerator according to claim 1, wherein: the elastic component comprises a connecting end located on the front side, a fixed end located on the rear side, and an elastic component body located between the connecting end and the fixed end.
8. The refrigerator according to claim 7, wherein: the connecting end comprises a lantern ring sleeved on the hinge shaft and a first connecting rod for connecting the lantern ring and the elastic piece body; the adjusting assembly further comprises a base fixedly mounted with the hinge, a mounting shaft is arranged on the base, and a mounting hole fixedly mounted with the mounting shaft is formed in the fixed end; the elastic piece body is a spring.
9. The refrigerator according to claim 1, wherein: the outer contour of the rotating piece is oval, and when the door body is closed, the position, closest to the hinge shaft, of the rotating piece is the first position.
CN201810488878.2A 2018-05-21 2018-05-21 A kind of refrigerator Active CN109028734B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201810488878.2A CN109028734B (en) 2018-05-21 2018-05-21 A kind of refrigerator
CN202110976692.3A CN113668969B (en) 2018-05-21 2018-05-21 Hinge device and refrigerator with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810488878.2A CN109028734B (en) 2018-05-21 2018-05-21 A kind of refrigerator

Related Child Applications (1)

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CN202110976692.3A Division CN113668969B (en) 2018-05-21 2018-05-21 Hinge device and refrigerator with same

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CN109028734A CN109028734A (en) 2018-12-18
CN109028734B true CN109028734B (en) 2021-09-10

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CN201810488878.2A Active CN109028734B (en) 2018-05-21 2018-05-21 A kind of refrigerator

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Publication number Priority date Publication date Assignee Title
CN111043822B (en) * 2019-12-20 2021-06-08 澳柯玛股份有限公司 Adjust embedded refrigerator structure of opening door
CN112595011B (en) * 2020-12-15 2023-04-18 海信冰箱有限公司 Refrigerator with a door
CN115143708B (en) * 2022-06-30 2023-11-10 东芝家用电器制造（南海）有限公司 Box device and refrigeration equipment

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Publication number Priority date Publication date Assignee Title
JP2008163715A (en) * 2007-01-05 2008-07-17 Sharp Corp Door opening/closing mechanism
KR101255514B1 (en) * 2011-11-08 2013-04-23 풍원공업 주식회사 Hinge for refrigerator door
CN202831958U (en) * 2012-07-25 2013-03-27 小天鹅（荆州）电器有限公司 Hinge and refrigerator
US20140145576A1 (en) * 2012-11-29 2014-05-29 Mansfield Engineered Components, Inc. Door closure mechanism for refrigerator or other appliance
CN104729202A (en) * 2015-03-19 2015-06-24 苏州市小伙伴电器有限公司 Automatic door closing device of food cold storage displaying case
CN108020012A (en) * 2017-12-30 2018-05-11 青岛海尔股份有限公司 A kind of door body hinge means and the refrigerator with the door body hinge means

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CN113668969A (en) 2021-11-19
CN109028734A (en) 2018-12-18
CN113668969B (en) 2023-04-18

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