CN108194496B - Electronic equipment and hinge mechanism thereof - Google Patents
Electronic equipment and hinge mechanism thereof Download PDFInfo
- Publication number
- CN108194496B CN108194496B CN201810001169.7A CN201810001169A CN108194496B CN 108194496 B CN108194496 B CN 108194496B CN 201810001169 A CN201810001169 A CN 201810001169A CN 108194496 B CN108194496 B CN 108194496B
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- Prior art keywords
- hinge
- hinge member
- hinged
- electronic device
- hinge mechanism
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/045—Pivotal connections with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0226—Hinges
Abstract
The application discloses hinge mechanism for connect first part and the second part that electronic equipment upset was opened and shut, include: a first hinge member connected to an inner surface of the first portion; a second hinge member connected to an inner surface of the second portion; a third hinge part with one end connected with the first hinge part in a sliding way and the other end hinged with the second hinge part; one end of the fourth hinged part is hinged with the first hinged part, and the other end of the fourth hinged part is connected with the second hinged part in a sliding mode. When the hinge mechanism is installed on the electronic equipment, the first hinge piece is connected with the inner surface of the first part, and the second hinge piece is connected with the inner surface of the second part, so that the hinge mechanism is not exposed on the outer surface of the electronic equipment no matter the electronic equipment is in a closed state or an unfolded state, and the appearance integrity of the electronic equipment is remarkably improved. The invention also provides electronic equipment with the hinge mechanism.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a hinge mechanism, and the invention also relates to electronic equipment with the hinge mechanism.
Background
On electronic equipment such as a notebook computer, a mobile phone and the like which can be turned over and opened and closed, a host part and a screen part which can be opened and closed relatively are connected in a rotating way through a rotating shaft mechanism. In the prior art, the rotating shaft mechanism is exposed on the outer surface of the electronic equipment while rotatably connecting the host part and the screen part, so that the appearance integrity of the electronic equipment is influenced.
In addition, in the conventional hinge mechanism, the position of the axis of the hinge is low, and since the axis is the axis of the rotation of the screen portion, the axis of the rotation of the screen portion is also low, in order to ensure the normal turning and opening of the electronic device, the electronic device needs to have a foot pad with a sufficient height, which may cause the thickness of the electronic device to be large, and affect the light and thin performance of the electronic device.
Disclosure of Invention
In view of the above, the present invention provides a hinge mechanism, which prevents the exposure of the outer surface of an electronic device while rotatably connecting a host portion and a screen portion of the electronic device, so that the appearance integrity of the electronic device is improved. The invention also provides electronic equipment with the hinge mechanism.
In order to achieve the purpose, the invention provides the following technical scheme:
a hinge mechanism for connecting a first part and a second part of an electronic device, which are turned over and opened, comprises:
a first hinge member connected to an inner surface of the first portion;
a second hinge member connected to an inner surface of the second portion;
one end of the third hinge piece is connected with the first hinge piece in a sliding mode, and the other end of the third hinge piece is hinged with the second hinge piece;
and one end of the fourth hinge part is hinged with the first hinge part, the other end of the fourth hinge part is connected with the second hinge part in a sliding manner, and the fourth hinge part is matched with the third hinge part to realize the relative overturning of the first hinge part and the second hinge part.
Preferably, in the hinge mechanism, the third hinge member is hinged to the first end of the second hinge member, the fourth hinge member is hinged to the first end of the first hinge member, and in an opened state, the first end of the first hinge member and the first end of the second hinge member are disposed close to each other.
Preferably, in the hinge mechanism, the third hinge member and the fourth hinge member are hinged, and a hinge portion is an intersection of the third hinge member and the fourth hinge member.
Preferably, in the hinge mechanism, the third hinge member is hinged to the second end of the second hinge member, the fourth hinge member is hinged to the second end of the first hinge member, and in the flipped open state, the second end of the first hinge member is the end far away from the second hinge member, and the second end of the second hinge member is the end far away from the first hinge member.
Preferably, in the hinge mechanism, the first hinge part and the second hinge part are provided with a strip-shaped hole, and the third hinge part is connected with the first hinge part in a sliding manner through a first connecting rod which passes through the strip-shaped hole and can slide in the strip-shaped hole; the fourth hinged part is connected with the second hinged part in a sliding mode through a second connecting rod which penetrates through the strip-shaped hole and can slide in the strip-shaped hole.
Preferably, in the hinge mechanism, the first hinge part, the second hinge part, the third hinge part and the fourth hinge part are all strip-shaped plate-shaped parts, the first link rod vertically penetrates through the first hinge part and the third hinge part, and the second link rod vertically penetrates through the second hinge part and the fourth hinge part.
An electronic device comprising a first part, a second part and a hinge mechanism, the hinge mechanism in any of the above.
Preferably, in the electronic device, a first mounting groove for mounting and accommodating the first hinge is formed on an inner surface of the first portion, and a second mounting groove for mounting and accommodating the second hinge is formed on an inner surface of the second portion.
Preferably, in the electronic device, a plurality of hinge mechanisms arranged side by side form a connection module, and are identical to all the first hinge elements in the connection module are all connected with a first connection plate, and are identical to all the second hinge elements in the connection module are all connected with a second connection plate, and the connection module is connected with the first installation groove through the first connection plate, and is connected with the second installation groove through the second connection plate.
Preferably, in the electronic device, the connection modules are disposed at both ends of the electronic device in a width direction of the electronic device.
The hinge mechanism provided by the invention at least comprises four hinge parts, wherein a first hinge part is used for being connected with a first part of the electronic equipment, a second hinge part is used for being connected with a second part of the electronic equipment, one end of a third hinge part is connected with the first connecting part in a sliding manner, the other end of the third hinge part is connected with the second hinge part in a hinged manner, one end of a fourth hinge part is connected with the first hinge part in a hinged manner, and the other end of the fourth hinge part is connected with the second hinge part in a sliding manner, namely the first hinge part and the second hinge part are connected through the third hinge part and the fourth hinge part, and the relative overturning between the first hinge part and the second hinge part is realized through the rotation and the. When the hinge mechanism is installed on an electronic device, the first hinge piece is connected with the inner surface of the first part, the second hinge piece is connected with the inner surface of the second part, so that when the first part and the second part are in a closed state, the whole hinge mechanism is positioned between the first part and the second part, and when the first part and the second part are in an unfolded state, the whole hinge mechanism is positioned between the first part and the second part, namely no matter the electronic device is in the closed state or the unfolded state, the hinge mechanism is not exposed on the outer surface of the electronic device, and the appearance integrity of the electronic device is remarkably improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a front view of a hinge mechanism provided by an embodiment of the present invention;
FIG. 2 is a rear view of the hinge mechanism;
fig. 3 is a schematic structural diagram of a connection module.
In the above fig. 1-3:
1-a first hinged part, 2-a second hinged part, 3-a third hinged part, 4-a fourth hinged part, 5-a first end, 6-a second end, 7-a strip-shaped hole, 8-a first connecting rod, 9-a second connecting rod, 10-a first connecting plate and 11-a second connecting plate.
Detailed Description
The invention provides a hinge mechanism which prevents the exposure of the outer surface of electronic equipment when a host part and a screen part of the electronic equipment are rotatably connected, so that the appearance integrity of the electronic equipment is improved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to fig. 3, the hinge mechanism according to the embodiment of the present invention can be installed on an electronic device to connect a first portion and a second portion of the electronic device, which are turned over and opened and closed, wherein when the electronic device is a notebook computer, the first portion can be a host portion of the notebook computer, and the second portion can be a screen portion of the notebook computer. The hinge mechanism mainly comprises a first hinge part 1, a second hinge part 2, a third hinge part 3 and a fourth hinge part 4. Wherein, the first articulated piece 1 is used for connecting with the first part and is arranged on the inner surface of the first part when being installed, the second articulated piece 2 is used for connecting with the second part and is also arranged on the inner surface of the second part when being installed, the third articulated piece 3 and the fourth articulated piece 4 are connected between the first articulated piece 1 and the second articulated piece 2, the relative overturn between the first articulated piece 1 and the second articulated piece 2 is realized through the cooperation of the third articulated piece 3 and the fourth articulated piece, specifically, the third articulated piece 3 is connected with the first articulated piece 1 in a sliding way and is articulated (rotationally connected) with the second articulated piece 2, the fourth articulated piece 4 is opposite and is articulated with the first articulated piece 1 and is connected with the second articulated piece 2 in a sliding way, when the third articulated piece 3 slides relative to the first articulated piece 1 and rotates relative to the fourth articulated piece 4, the fourth articulated piece 4 rotates relative to the first articulated piece 1 and slides relative to the second articulated piece 2, a relative tilting of the first articulation 1 and the second articulation 2 is enabled. When the hinge mechanism is assembled with the electronic device, the first hinge part 1 is arranged on the inner surface of the first part, and the second hinge part 2 is arranged on the inner surface of the second part, so that the hinge mechanism can not be exposed on the outer surface of the electronic device when the electronic device is in a closed state or an unfolded state.
In addition, the hinge mechanism of the structure is arranged on the inner surface of the first part, namely the top surface of the first part, so that the second part is integrally positioned at the top of the first part, and meanwhile, the hinge mechanism can enable the second part to eccentrically rotate relative to the first part, so that the height of the rotating axis of the second part is increased, the height of the electronic equipment pad can be reduced, the thickness of the electronic equipment can be reduced, and the light and thin performance of the electronic equipment is improved.
In order to further optimize the technical solution, in the hinge mechanism provided in this embodiment, as shown in fig. 1 and fig. 2, preferably, the third hinge member 3 is hinged to the first end 5 of the second hinge member 2, the fourth hinge member 4 is hinged to the first end 5 of the first hinge member 1, and in the flipped open state, the first end 5 of the first hinge member 1 and the first end 5 of the second hinge member 2 are disposed close to each other. In this arrangement, the sliding connection point of the third hinge member 3 and the first hinge member 1 is farther from the first end 5 than the hinge point of the fourth hinge member 4 and the first hinge member 1, therefore, no matter how large the sliding stroke of the third hinge member 3 on the first hinge member 1 is, the setting position of the hinge point between the fourth hinge member 4 and the first hinge member 1 will not be affected, and similarly, the sliding connection point between the third hinge member 3 and the second hinge member is further away from the first end 5 than the hinge point between the fourth hinge member 4 and the second hinge member 2, and the setting position of the hinge point between the third hinge member 3 and the second hinge member 2 will not be affected no matter how large the sliding stroke of the fourth hinge member 4 on the second hinge member 2 is, therefore, the volume of the whole hinge mechanism and the activity space required during working are both smaller, the working performance is improved, and the use requirement of light and thin electronic equipment is met.
In the arrangement mode that the hinge points are close to the first end 5, the third hinge member 3 and the fourth hinge member 4 can be in a crossed state when the electronic device is unfolded, and in order to better improve the working performance of the hinge mechanism, in this embodiment, it is further preferable that the third hinge member 3 and the fourth hinge member 4 are hinged, and the hinge portion is the crossed portion of the third hinge member 3 and the fourth hinge member 4, as shown in fig. 1 to fig. 3. The third hinge 3 and the fourth hinge 4 are further hinged, and the third hinge 3 and the fourth hinge 4 can be linked, so that when a pushing force is applied to the second portion of the electronic device (for example, when a pushing force in a counterclockwise direction is applied to the second portion after being unfolded), the second hinge 2 can rotate relative to the first hinge 1 (that is, the second hinge 2 in fig. 1 and 2 rotates counterclockwise, and a rotation circle center in the rotation process is a hinge point of the second hinge 2 and the third hinge 3), and at the same time, the second hinge 2 can move relative to the first hinge 1 (that is, under the driving of the fourth hinge 4, the third hinge 3 slides to the left in fig. 1 and 2 relative to the first hinge 1, and then the third hinge 3 drives the second hinge 2 to slide to the left relative to the first hinge 1), so that a force in one direction (clockwise or counterclockwise) is applied by a user, and the electronic device can be opened and closed. In addition, the third hinge 3 and the fourth hinge 4 may not be hinged, when the electronic device is opened or closed, the second hinge 2 connected to the second portion may be rotated by a certain angle under the action of a clockwise or counterclockwise thrust, and then a horizontal thrust is applied to the second portion, so that the second hinge 2 moves left or right relative to the first hinge 1, and the opening and closing of the electronic device can also be realized by such alternate operation.
In addition, the hinge position of the third hinge 3 and the second hinge 2 and the hinge position of the fourth hinge 4 and the first hinge 1 may be other positions, for example, the third hinge 3 is hinged to the second end 6 of the second hinge 2, the fourth hinge 4 is hinged to the second end 6 of the first hinge 1, and in the flipped open state, the second end 6 of the first hinge 1 is the end far away from the second hinge 2, and the second end 6 of the second hinge 2 is the end far away from the first hinge 1. In this arrangement, since the two sliding connection points respectively disposed on the first hinge member 1 and the second hinge member 2 are close to each other and the two hinge points are far away from each other, when the positions of the hinge points are designed, a sliding stroke large enough for the sliding end needs to be reserved to ensure the normal operation of the hinge mechanism.
Specifically, a strip-shaped hole 7 is formed in each of the first hinge member 1 and the second hinge member 2, and the third hinge member 3 is slidably connected to the first hinge member 1 through a first connecting rod 8 which penetrates through the strip-shaped hole 7 and can slide in the strip-shaped hole 7; the fourth hinge member 4 is slidably connected to the second hinge member 2 by a second link 9 passing through the strip-shaped hole 7 and being slidable in the strip-shaped hole 7, as shown in fig. 1 and 2. The structure can ensure that the structure of the hinge mechanism is simpler and the volume is smaller on the premise of ensuring the normal work of the hinge mechanism, so that the hinge mechanism is taken as an optimal setting mode. In addition, the sliding connection structure can also be a matching mechanism of the guide rail and the sliding block.
As shown in fig. 1 to 3, the first hinge 1, the second hinge 2, the third hinge 3 and the fourth hinge 4 are preferably strip-shaped plate-shaped members, and the first link 8 vertically passes through the first hinge 1 and the third hinge 3, and the second link 9 vertically passes through the second hinge 2 and the fourth hinge 4. The hinge mechanism with the structure can be smaller in size, can meet the installation requirements of electronic equipment of various models, and improves the universality of the hinge mechanism.
In addition, the embodiment also provides an electronic device, which includes a first part, a second part and a hinge mechanism, where the hinge mechanism is the hinge mechanism described above.
Further, in the electronic device, it is preferable that the inner surface of the first portion is formed with a first mounting groove for mounting and accommodating the first hinge member 1, and the inner surface of the second portion is formed with a second mounting groove for mounting and accommodating the second hinge member 2. The first mounting groove and the second mounting groove are formed for mounting and accommodating the hinge mechanism, so that when the electronic equipment is closed, the first part and the second part are fully attached, the gap between the first part and the second part is reduced, and the electronic equipment can be lighter and thinner.
As shown in fig. 3, in this embodiment, it is preferable that a plurality of hinge mechanisms arranged side by side constitute a connection module, and all first hinge members 1 in the same connection module are connected to a first connection plate 10, all second hinge members 2 in the same connection module are connected to a second connection plate 11, and the connection module is connected to a first installation groove through the first connection plate 10, and is connected to a second installation groove through the second connection plate 11. In order to further improve the working reliability of the hinge mechanism, when the hinge mechanism is installed on the electronic equipment, a plurality of hinge mechanisms are preferably made to form a connecting module and are connected into a whole through the first connecting plate 10 and the second connecting plate 11, so that the hinge mechanisms can work synchronously, and meanwhile, the hinge mechanisms are convenient to assemble with the electronic equipment, and the working performance of the electronic equipment is improved more remarkably.
In addition, in order to improve the connection stability, it is preferable that connection modules are provided at both ends of the electronic device in the width direction. Of course, without considering the above factors, a connection module may be disposed only in the middle of the electronic device in the width direction to rotatably connect the first portion and the second portion.
In the present specification, the structures of the respective portions are described in a progressive manner, and the structure of each portion is mainly described as being different from the existing structure, and the whole and partial structures of the hinge mechanism can be obtained by combining the structures of the portions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A hinge mechanism for connecting a first part and a second part of an electronic device, which are opened and closed in a turning manner, comprising:
a first hinge member connected to an inner surface of the first portion;
a second hinge member connected to an inner surface of the second portion;
one end of the third hinge piece is connected with the first hinge piece in a sliding mode, and the other end of the third hinge piece is hinged with the second hinge piece;
one end of the fourth hinge part is hinged with the first hinge part, the other end of the fourth hinge part is connected with the second hinge part in a sliding manner, and the fourth hinge part is matched with the third hinge part to realize the relative turning of the first hinge part and the second hinge part;
wherein the content of the first and second substances,
by connecting the first hinge member to the inner surface of the first portion and the second hinge member to the inner surface of the second portion, the entire hinge mechanism can be located between the first portion and the second portion, such that the hinge mechanism is not exposed to the outer surface of the electronic device; the first hinge part, the second hinge part, the third hinge part and the fourth hinge part are all straight strip-shaped plate-shaped parts.
2. A hinge mechanism according to claim 1, wherein the third hinge member is hingedly connected to the first end of the second hinge member, the fourth hinge member is hingedly connected to the first end of the first hinge member, and in the flipped open position, the first end of the first hinge member and the first end of the second hinge member are disposed adjacent to each other.
3. A hinge mechanism according to claim 2, wherein the third hinge member and the fourth hinge member are hinged, and the hinge point is the intersection of the third hinge member and the fourth hinge member.
4. A hinge mechanism according to claim 1, wherein the third hinge member is hinged to the second end of the second hinge member, the fourth hinge member is hinged to the second end of the first hinge member, and in the flipped open state, the second end of the first hinge member is the end remote from the second hinge member and the second end of the second hinge member is the end remote from the first hinge member.
5. A hinge mechanism according to any one of claims 1-4, wherein the first and second hinge parts are provided with a strip-shaped hole, and the third hinge part is slidably connected to the first hinge part via a first connecting rod which passes through the strip-shaped hole and can slide in the strip-shaped hole; the fourth hinged part is connected with the second hinged part in a sliding mode through a second connecting rod which penetrates through the strip-shaped hole and can slide in the strip-shaped hole.
6. A hinge mechanism according to claim 5, wherein the first link extends perpendicularly through the first and third hinges, and the second link extends perpendicularly through the second and fourth hinges.
7. An electronic device comprising a first part, a second part and a hinge mechanism, characterized in that the hinge mechanism is a hinge mechanism according to any of claims 1-6.
8. The electronic device of claim 7, wherein the first portion defines a first mounting slot on an inner surface thereof for receiving the first hinge member, and the second portion defines a second mounting slot on an inner surface thereof for receiving the second hinge member.
9. The electronic device of claim 8, wherein a plurality of the hinge mechanisms are arranged side by side to form a connection module, and all the first hinge members of the same connection module are connected to a first connection plate, all the second hinge members of the same connection module are connected to a second connection plate, and the connection module is connected to the first mounting groove through the first connection plate and connected to the second mounting groove through the second connection plate.
10. The electronic device according to claim 9, wherein the connection module is provided at both ends of the electronic device in a width direction of the electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810001169.7A CN108194496B (en) | 2018-01-02 | 2018-01-02 | Electronic equipment and hinge mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810001169.7A CN108194496B (en) | 2018-01-02 | 2018-01-02 | Electronic equipment and hinge mechanism thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN108194496A CN108194496A (en) | 2018-06-22 |
| CN108194496B true CN108194496B (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810001169.7A Active CN108194496B (en) | 2018-01-02 | 2018-01-02 | Electronic equipment and hinge mechanism thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109857201A (en) * | 2019-03-31 | 2019-06-07 | 联想(北京)有限公司 | A kind of electronic equipment, attachment device |
| CN110630628B (en) * | 2019-09-23 | 2024-02-27 | 联想(北京)有限公司 | Rotating shaft structure and electronic equipment |
| CN111946730B (en) * | 2020-08-05 | 2021-10-26 | Tcl通讯（宁波）有限公司 | Hinge mechanism and terminal thereof |
| CN112612324B (en) * | 2020-12-29 | 2023-02-07 | 广东虹勤通讯技术有限公司 | Angle adjusting assembly and electronic equipment |
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| WO2013118924A1 (en) * | 2012-02-06 | 2013-08-15 | (주)케이에이치바텍 | Free-stop hinge module of folder type portable terminal |
| TW201336390A (en) * | 2012-02-17 | 2013-09-01 | Yuan Deng Metals Ind Co Ltd | A power-on/off stabilizing device for a clamshell electronic device |
| TWM489217U (en) * | 2014-08-13 | 2014-11-01 | Sinher Tech Inc | Hinge with rotating and attaching functions |
| CN106802691A (en) * | 2015-11-26 | 2017-06-06 | 宏碁股份有限公司 | Pivot |
| CN206647416U (en) * | 2017-04-01 | 2017-11-17 | 兆利科技工业股份有限公司 | Concealed split hinge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205000789U (en) * | 2015-09-28 | 2016-01-27 | 王庆 | Hidden hinge with embedding structure |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013118924A1 (en) * | 2012-02-06 | 2013-08-15 | (주)케이에이치바텍 | Free-stop hinge module of folder type portable terminal |
| TW201336390A (en) * | 2012-02-17 | 2013-09-01 | Yuan Deng Metals Ind Co Ltd | A power-on/off stabilizing device for a clamshell electronic device |
| TWM489217U (en) * | 2014-08-13 | 2014-11-01 | Sinher Tech Inc | Hinge with rotating and attaching functions |
| CN106802691A (en) * | 2015-11-26 | 2017-06-06 | 宏碁股份有限公司 | Pivot |
| CN206647416U (en) * | 2017-04-01 | 2017-11-17 | 兆利科技工业股份有限公司 | Concealed split hinge |
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| CN108194496A (en) | 2018-06-22 |
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