CN205038563U - Notebook computer - Google Patents
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- CN205038563U CN205038563U CN201520691549.XU CN201520691549U CN205038563U CN 205038563 U CN205038563 U CN 205038563U CN 201520691549 U CN201520691549 U CN 201520691549U CN 205038563 U CN205038563 U CN 205038563U
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Abstract
The utility model provides a notebook computer, including host computer part and display part, the host computer part is including the relative key board operation face and the back, the display part includes: a support body, the support body swing joint be in one side of host computer part, and can be relative the host computer partial switching, and the coincide is in the back of host computer part, the two ends of the display scree, the display screen swing joint be in on the support body, and can be relative upset around the support body is worked as the support body coincide is in during the back of host computer part, the display surface of display screen can towards the back of host computer part. The utility model provides a notebook computer, its support body can drive the display screen coincide at the back of host computer part, and the display screen can be for upset around the support body, and make when display screen coincide during at the host computer part back, and the display surface of display screen is towards the partial back of host computer to avoid the display surface damage of display screen.
Description
Technical Field
The utility model relates to a computer terminal designs the field, especially relates to a notebook computer.
Background
At present, a large-size display with full high definition is very common on a computer, and a user using a notebook computer is provided with a large-size independent display additionally, so that the user can enjoy visual enjoyment brought by high definition, however, as shown in fig. 1, it is not very convenient for the notebook 1 to open a screen and then keep a rear bumper in front of an external display 2. As shown in fig. 2, the screen 10 of the existing notebook 1 can be opened for 360 degrees, so that the screen 10 can be folded directly to the back of the host, but the screen face faces downwards, and there is a risk of damaging the screen.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a notebook computer, its display screen book can avoid damaging the display screen when the host computer back.
The utility model provides a technical scheme as follows:
a notebook computer comprises a host part and a display part, wherein the host part comprises a keyboard operation surface and a back surface which are opposite; the display section includes:
the frame body is movably connected to one side of the main machine part, can be overturned relative to the main machine part and is superposed on the back of the main machine part;
and the display screen is movably connected to the frame body and can be turned over around the frame body, and when the frame body is overlapped on the back of the host part, the display surface of the display screen can face to the back of the host part.
Further, the support body including set up in at least one side frame of display screen one side, the display screen with be provided with between the side frame of support body and be used for making the rotating assembly of upset around the display screen.
Further, the rotating assembly comprises a rotating shaft arranged between the display screen and the side frame of the frame body, and the display screen can turn around the rotating shaft.
Furthermore, the rotating shaft is of a hollow shaft structure, and an electric wire for electrically connecting the main machine part and the display screen penetrates through the rotating shaft.
Further, the frame body at least comprises a first side frame and a second side frame which are opposite, and the display screen is located between the first side frame and the second side frame;
the display screen comprises a first side frame, a second side frame and a display screen, wherein the first side frame and the display screen and the second side frame and the display screen are respectively provided with a rotating shaft, the two rotating shafts are arranged oppositely, the axial leads of the two rotating shafts are positioned on the same straight line, and the display screen can be overturned around the axial leads of the two rotating shafts.
Furthermore, an angle limiting structure used for limiting the turning angle of the display screen is arranged between the display screen and the frame body.
Further, the frame body comprises a first surface and a second surface, wherein the first surface is positioned on one side close to the keyboard operation surface of the main machine part, and the second surface is opposite to the first surface;
the angle defining structure includes:
the bulge is convexly arranged at the edge of one side of the display screen;
the first limiting groove and the second limiting groove are arranged on the frame body and are respectively positioned on two sides of the overturning axis of the display screen;
when the display screen is turned over along the first direction until the display surface of the display screen faces the first surface of the frame body, the bulge part on the display screen can be limited in the first limiting groove, so that the display screen cannot be turned over towards the first direction continuously;
when the display screen is turned over to the state that the display surface of the display screen faces the second surface of the frame body along the second direction, the bulge part on the display screen can be limited in the second limiting groove, so that the display screen cannot be turned over continuously towards the second direction.
Furthermore, the frame body comprises a third side frame and a fourth side frame which are oppositely arranged, the first side frame, the third side frame, the second side frame and the fourth side frame are sequentially connected and enclose a frame structure with a hollow interior, and the display screen is arranged in a hollow area of the frame structure; the first limiting groove is formed in the third side frame, and the fourth limiting groove is formed in the fourth side frame.
Furthermore, a locking structure for locking the display screen is further arranged on the frame body.
Further, the locking structure includes:
the locking groove is arranged on the edge of at least one side of the display screen;
the elastic bulge structure can be matched with the locking groove, and is arranged on the frame body; wherein,
when the locking groove moves into a position corresponding to the elastic bulge structure along with the turning of the display screen, the elastic bulge structure can elastically stretch and retract and is contained in the locking groove;
when the locking groove moves out of the position aligned with the elastic bulge structure along with the turning of the display screen, the elastic bulge structure can elastically stretch and retract to be separated from the locking groove.
Further, the elastic projection structure includes:
the accommodating cavity is arranged on the frame body;
the spring is arranged in the accommodating cavity;
the sliding ball is arranged at the opening of the accommodating cavity and partially protrudes out of the opening of the accommodating cavity; wherein the spring is propped against between the sliding ball and the cavity bottom of the accommodating cavity.
The utility model has the advantages as follows:
the utility model provides a notebook computer, its support body can drive the display screen coincide at the back of host computer part, and the display screen can overturn around for the support body again, and make when the display screen coincide at the host computer part back, the display surface of display screen is towards the back of host computer part to avoid the display surface damage of display screen.
Drawings
Fig. 1 is a schematic diagram illustrating a notebook computer in the prior art when a large screen is connected externally;
FIG. 2 is a schematic diagram of a notebook computer according to the prior art;
fig. 3 is a schematic structural diagram of a notebook computer provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a rack body of a notebook computer provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display screen of a notebook computer provided in an embodiment of the present invention;
fig. 6 is a bottom view of a third side frame of a notebook computer rack according to an embodiment of the present invention;
fig. 7 is a top view of a fourth side frame of a notebook computer rack according to an embodiment of the present invention;
fig. 8 shows a schematic diagram of a notebook computer provided in an embodiment of the present invention when the notebook computer is externally connected to a large screen.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
When the screen to notebook computer among the prior art rolls over the host computer back, the display surface of screen can outwards and cause the technical problem of damage easily, the utility model provides a notebook computer, it can be when the screen rolls over the host computer back for the display surface of screen is towards the back of host computer, and reduces the damage risk.
As shown in fig. 3, the notebook computer provided by the present invention includes a main body part 100 and a display part, wherein the main body part 100 includes a keyboard operation surface and a back surface opposite to each other; the display section includes:
the frame body 201 is movably connected to one side of the main machine part 100, can be overturned relative to the main machine part 100 and is overlapped on the back of the main machine part 100;
and the display screen 202 is movably connected to the frame body 201 and can be turned over relative to the frame body 201, and when the frame body 201 is overlapped on the back of the host computer part 100, the display surface of the display screen 202 can face the back of the host computer part 100.
In the notebook computer that above-mentioned scheme provided, support body 201 can drive display screen 202 coincide at the back of host computer portion 100, and display screen 202 can overturn from front to back for support body 201 again, thereby, when needs are rolled over display screen 202 to the back of host computer portion 100, can overturn 180 degrees around display screen 202 earlier, and then overturn display screen 202 along with support body 201 and coincide at the back of host computer portion 100, so, display screen 202's display surface will be protected in the middle of, has reduced the damage risk.
In the embodiment of the present invention, preferably, the frame body 201 includes at least one side frame disposed on one side of the display screen 202, the display screen 202 and the side frame of the frame body 201 are disposed with a rotating component for rotating the display screen 202 back and forth. Preferably, the rotating assembly includes a rotating shaft disposed between the display screen 202 and the side frame of the frame body 201, and the display screen 202 can be turned around the rotating shaft.
By adopting the scheme, the structure is simple, the operation is convenient, when the display screen 202 needs to be folded to the back of the main machine part 100, the display screen 202 is turned around the rotating shaft on the side frame of the frame body 201, and then the frame body 201 is turned to be overlapped with the main machine part 100.
It should be noted that, in practical applications, the structure of the rotating assembly may not be limited to this, and other structures may also be adopted as long as the display screen 202 can be turned back and forth relative to the frame body 201, which merely provides a preferred manner of the rotating assembly, but is not limited to this.
Preferably, as shown in fig. 3 to 5, the shelf 201 at least includes a first side frame 2011 and a second side frame 2012 which are opposite to each other, and the display 202 is located between the first side frame 2011 and the second side frame 2012; a rotating shaft 300 is respectively arranged between the first side frame 2011 and the display screen 202 and between the second side frame 2012 and the display screen 202, the two rotating shafts 300 are oppositely arranged, the axial leads of the two rotating shafts 300 are positioned on the same straight line, and the display screen 202 can be turned around the axial leads of the two rotating shafts 300.
By adopting the technical scheme, the frame body 201 is provided with at least two side frames, the display screen 202 can be turned around the two rotating shafts 300 between the two side frames, and the turning process is more reliable compared with a mode of only arranging one side frame.
In addition, in the notebook computer provided in the embodiment of the present invention, preferably, the rotating shaft 300 is a hollow shaft structure, and an electric wire for electrically connecting the main body portion 100 and the display screen 202 is disposed inside the rotating shaft 300. The display screen 202 is connected to the main body portion 100 by wires passing through the rotary shaft 300.
Furthermore, in the notebook computer provided by the present invention, preferably, an angle limiting structure for limiting the turning angle of the display screen 202 is provided between the display screen 202 and the frame body 201.
Through setting up the structure is injectd to the angle, can inject the rotation angle of display screen 202, and make display screen 202 can only overturn at predetermined rotation angle within range, from this, when can avoiding using, display screen 202 ceaselessly rotates to same direction, and causes bad production, for example: the power signal lines and the like connected through the rotation shaft 300 may not be rotated without limitation, and the front and rear turning directions of the display screen 202 may be defined by providing the angle limiting structure, thereby preventing the electric lines from being damaged due to twisting.
In the notebook computer provided by the present invention, the frame body 201 includes a first surface 201a located at a side close to the keyboard operation surface of the main body part 100 and a second surface 201b opposite to the first surface, wherein, when the frame body 201 is overlapped on the back surface of the main body part 100, the second surface 201b of the frame body 201 faces the back surface of the main body part 100.
Preferably, as shown in fig. 3 to 7, the angle defining structure includes: a protrusion 401 protruding from an edge of one side of the display screen 202; a first limiting groove 402 and a second limiting groove 403 which are arranged on the frame body 201, wherein the first limiting groove 402 and the second limiting groove 403 are respectively located on two sides of the overturning axis of the display screen 202 by taking the overturning axis of the display screen 202 as a boundary;
when the display screen 202 is turned over along the first direction until the display surface of the display screen 202 faces the first surface 201a of the frame body 201, the protrusion 401 on the display screen 202 can be limited in the first limiting groove 402, so that the display screen 202 cannot be turned over continuously along the first direction; when the display screen 202 is turned over along the second direction until the display surface of the display screen 202 faces the second surface 201b of the frame body 201, the protrusion 401 on the display screen 202 can be limited in the second limiting groove 403, so that the display screen 202 cannot be turned over continuously along the second direction.
By adopting the above scheme, the first limiting groove 402 and the second limiting groove 403 are arranged on the frame body 201 and are respectively located on two sides of the turning axis of the display screen 202, so that when the display screen 202 rotates along the first direction until the display surface faces the first surface 201a of the frame body 201, the protruding part 401 on the display screen 202 can be matched with the first limiting groove 402, and the display screen 202 can only be turned back to the second direction to turn over, but cannot continue to turn over along the first direction; when the display screen 202 rotates to the position where the display surface faces the second surface 201b of the frame body 201 along the second direction, the protrusion 401 on the display screen 202 can be matched with the second limiting groove 403, and the display screen 202 can only be turned back to the first direction and turned over, but cannot be turned over along the second direction, so that the display screen 202 can only be rotated 180 degrees.
In the above solution, the rotation direction of the display screen 202 is defined by providing the protruding portion 401 on the display screen 202 and digging the limiting groove on the frame body 201, it should be understood that in practical applications, specific implementation manners of the angle limiting structure may be various, and are not listed.
The following describes a preferred embodiment of the notebook computer of the present invention.
In this embodiment, as shown in fig. 3 to 7, the frame body 201 includes a first side frame 2011 and a second side frame 2012 which are oppositely arranged, and a third side frame 2013 and a fourth side frame 2014 which are oppositely arranged, the first side frame 2011, the third side frame 2013, the second side frame 2012 and the fourth side frame 2014 are sequentially connected to enclose a frame structure with a hollow interior, and the display screen 202 is disposed in the hollow area of the frame structure; the display screen 202 is movably connected with the first side frame 2011 and the second side frame 2012 through the rotating shaft 300, the hollow area of the frame structure is turned around the rotating shaft 300, the first limiting groove 402 is arranged on the third side frame 2013, the second limiting groove 403 is arranged on the fourth side frame 2014, the first limiting groove 402 and the second limiting groove 403 are both closed at one end and semi-opened at the other end, and the openings of the first limiting groove 402 and the second limiting groove 403 face the first surface 201a of the frame body 201 or face the second surface 201b of the frame body 201.
By adopting the above scheme, when the display screen 202 is turned over along the first direction until the display surface of the display screen faces the first surface 201a of the frame body 201, the protruding portion 401 on the display screen 202 can move into the first limiting groove 402 from the open end of the first limiting groove 402 and is limited by the closed end of the first limiting groove 402, so that the display screen 202 cannot be turned over continuously towards the first direction but can be turned over towards the second direction; similarly, when the display screen 202 is turned in the second direction until the display surface thereof faces the second surface 201b of the frame body 201, the protrusion 401 on the display screen 202 can move into the second limiting groove 403 from the open end of the second limiting groove 403, and is limited by the closed end of the second limiting groove 403, and can be limited in the second limiting groove 403, so that the display screen 202 cannot be turned in the second direction.
It should be noted that the above only provides a preferred structure of the angle limiting structure, and in practical applications, the specific implementation manner of the angle limiting structure may be various, for example: the first and second retaining grooves 402 and 403 may be disposed on the first side frame 2011 and/or the second side frame 2012, and are disposed on two sides of the rotating shaft 300, respectively, with the rotating shaft 300 as a boundary.
It should be noted that, in the notebook computer provided by the present invention, as shown in the figure, the first side frame and the second side frame may be one end and the host portion movably connected, and the other end is turned around the junction with the host portion, so as to fold or open the frame body, and at this time, the turning direction of the display screen relative to the frame body may be the same as the turning direction of the frame body relative to the host portion. And in the utility model discloses an in other embodiments, can also be third side frame with the one end and the host computer part swing joint of fourth side frame, and the other end around with the junction upset of host computer part realizes that the support body is folding or open, at this moment, the upset direction of display screen for the support body is different with the upset direction of support body for the host computer part.
Furthermore, in the utility model provides an among the notebook computer, still be provided with the locking structure on the support body 201 for when display screen 202 overturns to its display surface orientation when first face 201a or the second face 201b of support body 201, lock display screen 202. That is, the display 202 can be rotated to the locked position and then fixed by the locking structure.
Preferably, as shown in fig. 4 and 5, the locking structure includes:
a locking groove 501, wherein the locking groove 501 is arranged at the edge of at least one side of the display screen 202; the elastic protruding structures 502 can be matched with the locking grooves 501, the number of the elastic protruding structures 502 is two, the two elastic protruding structures 502 are arranged on the frame body 201, and the two elastic protruding structures 502 are arranged on the frame body 201 and located on two sides of the turning axis of the display screen 202; wherein,
when the locking groove 501 is turned over along with the display screen 202 and moves into a position corresponding to the elastic bump structure 502, the elastic bump structure 502 can elastically stretch and retract and is accommodated in the locking groove 501;
when the locking groove 501 moves out of the position aligned with the elastic protrusion structure 502 along with the turning of the display screen 202, the elastic protrusion structure 502 can elastically stretch and retract to come out of the locking groove 501.
By adopting the above scheme, when the display screen 202 needs to be normally displayed, the display screen 202 is turned to the state that the display surface faces the first surface 201a of the frame structure, the elastic protrusion structure 502 on the frame body 201 can elastically stretch and retract and is accommodated in the locking groove 501 on the display screen 202, and when the display screen 202 needs to be turned, the elastic protrusion structure 502 on the frame body 201 can elastically stretch and retract and is disengaged from the locking groove 501 on the display screen 202; similarly, when the display screen 202 is required to be folded to the back of the main portion 100, the display screen 202 is turned to the second side 201b of the frame structure facing the display surface, the elastic protrusion structure 502 on the frame body 201 can elastically stretch and retract and is accommodated in the locking groove 501 on the display screen 202, and when the display screen 202 is required to be turned, the elastic protrusion structure 502 on the frame body 201 can elastically stretch and retract and is disengaged from the locking groove 501 on the display screen 202.
It should be noted that, in practical applications, the specific assembling manner of the locking structure is not limited to the above-mentioned scheme, and may also be implemented in other manners. For example: the frame body 201 is provided with a convex part 401, and the display screen 202 is provided with an elastic convex structure 502 and the like.
One preferred configuration of the resilient projection structure 502 is provided below.
As shown in fig. 4, preferably, the elastic protrusion structure 502 includes:
the accommodating cavity is arranged on the frame body 201;
the spring 5021 is arranged in the accommodating cavity;
the sliding bead 5022 is arranged at the opening of the accommodating cavity and partially protrudes out of the opening of the accommodating cavity; the spring 5021 abuts against the sliding ball 5022 and the bottom of the accommodating cavity.
By adopting the scheme, the sliding bead 5022 can be matched with the locking groove 501 on the display screen 202 under the elastic action of the spring 5021, the structure is simple, and the sliding bead 5022 has a smooth surface, so that the sliding bead 5022 is matched with the locking groove 501 on the display screen 202 when the display screen 202 is turned over. It should be understood that there are many specific implementations of the resilient projection structure 502, which are provided only for a preferred solution and are not limited thereto.
As shown in fig. 8, when the notebook computer 30 provided in the embodiment of the present invention is connected to the large screen 20, the display screen of the notebook computer can be overlapped on the back surface of the main body part 100, and the display surface of the display screen can face the back surface of the main body part 100, so as to avoid damaging the screen.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A notebook computer comprises a host part and a display part, wherein the host part comprises a keyboard operation surface and a back surface which are opposite; characterized in that the display section includes:
the frame body is movably connected to one side of the main machine part, can be overturned relative to the main machine part and is superposed on the back of the main machine part;
and the display screen is movably connected to the frame body and can be turned over around the frame body, and when the frame body is overlapped on the back of the host part, the display surface of the display screen can face to the back of the host part.
2. The notebook computer of claim 1,
the support body including set up in at least one side frame of display screen one side, the display screen with be provided with between the side frame of support body and be used for making the rotating assembly of upset around the display screen.
3. The notebook computer of claim 2,
the rotating assembly comprises a rotating shaft arranged between the display screen and the side frame of the frame body, and the display screen can rotate around the rotating shaft.
4. The notebook computer of claim 3,
the rotating shaft is of a hollow shaft structure, and an electric wire used for electrically connecting the host part and the display screen penetrates through the rotating shaft.
5. The notebook computer of claim 3,
the frame body at least comprises a first side frame and a second side frame which are opposite, and the display screen is positioned between the first side frame and the second side frame;
the display screen comprises a first side frame, a second side frame and a display screen, wherein the first side frame and the display screen and the second side frame and the display screen are respectively provided with a rotating shaft, the two rotating shafts are arranged oppositely, the axial leads of the two rotating shafts are positioned on the same straight line, and the display screen can be overturned around the axial leads of the two rotating shafts.
6. The notebook computer of claim 1,
an angle limiting structure used for limiting the turning angle of the display screen is arranged between the display screen and the frame body.
7. The notebook computer of claim 6,
the frame body comprises a first surface and a second surface, wherein the first surface is positioned on one side close to the keyboard operation surface of the host machine part, and the second surface is opposite to the first surface;
the angle defining structure includes:
the bulge is convexly arranged at the edge of one side of the display screen;
the first limiting groove and the second limiting groove are arranged on the frame body and are respectively positioned on two sides of the overturning axis of the display screen;
when the display screen is turned over along the first direction until the display surface of the display screen faces the first surface of the frame body, the bulge part on the display screen can be limited in the first limiting groove, so that the display screen cannot be turned over towards the first direction continuously;
when the display screen is turned over to the state that the display surface of the display screen faces the second surface of the frame body along the second direction, the bulge part on the display screen can be limited in the second limiting groove, so that the display screen cannot be turned over continuously towards the second direction.
8. The notebook computer of claim 7,
the frame body comprises a third side frame and a fourth side frame which are oppositely arranged, the first side frame, the third side frame, the second side frame and the fourth side frame are sequentially connected and enclosed into a frame structure with a hollow interior, and the display screen is arranged in a hollow area of the frame structure; the first limiting groove is formed in the third side frame, and the second limiting groove is formed in the fourth side frame.
9. The notebook computer of claim 1,
the frame body is further provided with a locking structure for locking the display screen.
10. The notebook computer of claim 9,
the locking structure includes:
the locking groove is arranged on the edge of at least one side of the display screen;
the elastic bulge structure can be matched with the locking groove, and is arranged on the frame body; wherein,
when the locking groove moves into a position corresponding to the elastic bulge structure along with the turning of the display screen, the elastic bulge structure can elastically stretch and retract and is contained in the locking groove;
when the locking groove moves out of the position aligned with the elastic bulge structure along with the turning of the display screen, the elastic bulge structure can elastically stretch and retract to be separated from the locking groove.
11. The notebook computer of claim 10,
the elastic projection structure includes:
the accommodating cavity is arranged on the frame body;
the spring is arranged in the accommodating cavity;
the sliding ball is arranged at the opening of the accommodating cavity and partially protrudes out of the opening of the accommodating cavity; wherein the spring is propped against between the sliding ball and the cavity bottom of the accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520691549.XU CN205038563U (en) | 2015-09-08 | 2015-09-08 | Notebook computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520691549.XU CN205038563U (en) | 2015-09-08 | 2015-09-08 | Notebook computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205038563U true CN205038563U (en) | 2016-02-17 |
Family
ID=55297452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520691549.XU Active CN205038563U (en) | 2015-09-08 | 2015-09-08 | Notebook computer |
Country Status (1)
| Country | Link |
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| CN (1) | CN205038563U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710331A (en) * | 2017-03-17 | 2017-05-24 | 马鞍山鑫霖电子科技有限公司 | Rotatable learning machine |
| CN109739303A (en) * | 2018-12-29 | 2019-05-10 | Oppo（重庆）智能科技有限公司 | Electronic equipment |
| CN111124044A (en) * | 2019-11-29 | 2020-05-08 | ***光电科技(合肥)有限公司 | Rotatable screen and mobile equipment |
| CN113925280A (en) * | 2021-09-18 | 2022-01-14 | 陈敏 | Equipment operation platform for online education |
-
2015
- 2015-09-08 CN CN201520691549.XU patent/CN205038563U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710331A (en) * | 2017-03-17 | 2017-05-24 | 马鞍山鑫霖电子科技有限公司 | Rotatable learning machine |
| CN109739303A (en) * | 2018-12-29 | 2019-05-10 | Oppo（重庆）智能科技有限公司 | Electronic equipment |
| CN111124044A (en) * | 2019-11-29 | 2020-05-08 | ***光电科技(合肥)有限公司 | Rotatable screen and mobile equipment |
| CN111124044B (en) * | 2019-11-29 | 2022-07-12 | ***光电科技(合肥)有限公司 | Rotatable screen and mobile equipment |
| CN113925280A (en) * | 2021-09-18 | 2022-01-14 | 陈敏 | Equipment operation platform for online education |
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