CN211259338U - Hinge assembly and electronic device - Google Patents
Hinge assembly and electronic device Download PDFInfo
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- CN211259338U CN211259338U CN201922278928.7U CN201922278928U CN211259338U CN 211259338 U CN211259338 U CN 211259338U CN 201922278928 U CN201922278928 U CN 201922278928U CN 211259338 U CN211259338 U CN 211259338U
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Abstract
The utility model belongs to the technical field of the hinge technique and specifically relates to a hinge subassembly and electronic equipment is related to. The hinge assembly includes a first transmission shaft, a second transmission shaft, and a kidney-shaped intermediate gear. The first transmission shaft lever is provided with a first helical gear, the second transmission shaft lever is provided with a second helical gear, the waist-shaped intermediate gear is integrally waist-shaped, and two ends of the waist-shaped intermediate gear along the long axis direction are respectively meshed with the first helical gear and the second helical gear, so that the first transmission shaft lever, the waist-shaped intermediate gear and the second transmission shaft lever form meshing transmission. The two sides of the waist-shaped intermediary gear along the short axis direction respectively form avoiding spaces, so that the size of the waist-shaped intermediary gear along the short axis direction is reduced, the axial space occupied by the waist-shaped intermediary gear along the short axis direction is further reduced, and the miniaturization of the hinge assembly and the lightness and thinness of the notebook computer are facilitated. The electronic device comprises the hinge assembly, so that the hinge installation space reserved for the electronic device is reduced, and the electronic device can be lighter and thinner.
Description
Technical Field
The utility model belongs to the technical field of the hinge technique and specifically relates to a hinge subassembly and electronic equipment is related to.
Background
In the prior art, a screen and a base of a general portable electronic device, such as a notebook computer, a foldable mobile phone, an electronic book reader, or other flip-type electronic devices, are connected by a biaxial hinge, so that the screen can be folded and folded in 360 degrees relative to the base or can be moved in the same reverse direction to return to a closed state. The double-shaft hinge has the specific structure that the two parts are driven to swing by respectively connecting the two gear shafts with the screen and the base, an idle wheel is arranged between the two gear shafts, and the transmission of rotation between the two gear shafts is realized by matching the idle wheel and the two gear shafts. However, the idler wheels adopted by the existing double-shaft hinge are all ring-shaped idler wheels, and due to the limitation of the shape of the idler wheels, the installation of the idler wheels needs to occupy larger space, so that the hinge cannot be designed to be shortened.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a hinge subassembly and electronic equipment to solve the two-axis hinge that exists among the prior art and adopt annular idler wheel, lead to occupation space great, the unable design of hinge subtracts the technical problem of weak point.
The present application provides a hinge assembly comprising:
a first transmission shaft having a first axis and formed with a first helical gear;
a second transmission shaft having a second axis parallel to the first axis and formed with a second helical gear;
a waist-shaped intermediate gear which is positioned between the first transmission shaft and the second transmission shaft and has a rotation axis which is perpendicular to a plane formed by the first axis and the second axis; and a first intermediate helical tooth part meshed with the first helical gear and a second intermediate helical tooth part meshed with the second helical gear are respectively formed at two ends of the waist-shaped intermediate gear along the long axis direction of the waist-shaped intermediate gear.
In the above technical solution, preferably, the effective meshing portions of the first intermediate helical gear and the first helical gear and the effective meshing portion of the second intermediate helical gear and the second helical gear are capable of rotating the first transmission shaft and the second transmission shaft at least 180 degrees around their respective axes.
In any of the above technical solutions, preferably, two side surfaces of the kidney-shaped intermediate gear along the minor axis direction thereof are parallel.
In any one of the above-described embodiments, preferably, a diameter of a tip circle of the first intermediate helical tooth portion is equal to a diameter of a tip circle of the second intermediate helical tooth portion.
In any of the above embodiments, preferably, the addendum circle of the first helical gear has a diameter equal to that of the addendum circle of the second helical gear.
In any of the above solutions, preferably, the hinge assembly further includes a mount; the mounting seat is provided with two shaft holes with parallel central lines and a mounting cavity positioned between the two shaft holes; the first transmission shaft lever and the second transmission shaft lever respectively penetrate through the two shaft holes, and the waist-shaped intermediate gear is located in the installation cavity.
In any one of the above technical solutions, preferably, the hinge assembly further includes:
the torsion adjusting pieces are stacked and sleeved on the first transmission shaft rod and the second transmission shaft rod and elastically urge the first transmission shaft rod and the second transmission shaft rod; and/or
The two ends of the plate-shaped cladding torsion piece are respectively and elastically and tightly clad on the first transmission shaft lever and the second transmission shaft lever; and/or
The first torsion spring group, the second torsion spring group and the two screwing nuts are arranged on the base; the first torsion spring set and the second torsion spring set are respectively arranged on the first transmission shaft rod and the second transmission shaft rod in a penetrating way; the two screwing nuts are screwed on the ends of the first transmission shaft lever and the second transmission shaft lever respectively.
The application also provides an electronic device, which comprises the hinge assembly, a first connecting part and a second connecting part;
the first connecting part is fixedly connected with the first transmission shaft lever, and the second connecting part is fixedly connected with the second transmission shaft lever; the first connecting portion is used for connecting a keyboard of the electronic equipment, and the second connecting portion is used for connecting a display screen of the electronic equipment.
In the above technical solution, preferably, the electronic device is a notebook computer including a display screen and a keyboard, the first connecting portion is fixedly connected to the display screen, and the second connecting portion is fixedly connected to the keyboard.
Compared with the prior art, the beneficial effects of the utility model are that:
the hinge assembly provided by the present application includes a first drive shaft, a second drive shaft, and a kidney idler gear. The first transmission shaft lever is provided with a first bevel gear, the second transmission shaft lever and the first transmission shaft lever are arranged in parallel at intervals, and the second transmission shaft lever is provided with a second bevel gear. The waist-shaped intermediate gear is positioned between the first transmission shaft rod and the second transmission shaft rod. The waist-shaped intermediary gear is integrally waist-shaped and is provided with a long shaft along the length direction and a short shaft along the width direction, and a first intermediary helical tooth part and a second intermediary helical tooth part are respectively formed at two ends of the waist-shaped intermediary gear along the long shaft direction, wherein the first intermediary helical tooth part is meshed with the first helical gear, and the second intermediary helical tooth part is meshed with the second helical gear, so that meshing transmission can be formed among the first transmission shaft lever, the waist-shaped intermediary gear and the second transmission shaft lever, namely, the rotation of the first transmission shaft lever can drive the second transmission shaft lever to rotate through the waist-shaped intermediary gear or the rotation of the second transmission shaft lever can drive the first transmission shaft lever to rotate through the waist-shaped intermediary gear. In addition, the two sides of the waist-shaped intermediary gear along the short axis direction of the waist-shaped intermediary gear respectively form avoiding spaces, so that the size of the waist-shaped intermediary gear along the short axis direction of the waist-shaped intermediary gear is reduced, the axial space occupied by the waist-shaped intermediary gear along the short axis direction of the waist-shaped intermediary gear is further reduced, and the hinge assembly is miniaturized and the notebook computer is light and thin.
The electronic equipment comprises the hinge assembly, a first connecting part and a second connecting part; the keyboard and the display screen of the electronic equipment are connected through the corresponding connecting parts and the hinge assemblies, so that the keyboard and the display screen can be opened and closed relatively in 360 degrees. And because the axial dimension of the hinge assembly adopted by the electronic equipment is reduced, the hinge installation space reserved for the electronic equipment is reduced, and the electronic equipment can be thinner and thinner.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a hinge assembly according to an embodiment of the present invention at a first viewing angle;
fig. 2 is a schematic view of a hinge assembly according to an embodiment of the present invention from a second perspective;
fig. 3 is a schematic structural view of a kidney-shaped intermediate gear of a hinge assembly according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a hinge assembly according to an embodiment of the present invention.
Reference numerals:
1-a first transmission shaft lever, 11-a first helical gear, 2-a second transmission shaft lever, 21-a second helical gear, 3-a kidney-shaped intermediate gear, 31-a first intermediate helical tooth part, 32-a second intermediate helical tooth part, 4-a mounting seat, 41-a positioning pin, 51-a torsion adjusting plate, 53-a first torsion spring group, 54-a second torsion spring group, 55-a screwing nut, 6-a first connecting part, 7-a second connecting part, a-a long axis direction and b-a short axis direction.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.
The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A hinge assembly and an electronic device according to some embodiments of the present invention are described below with reference to fig. 1 to 4.
Example one
The application provides a hinge assembly, which comprises a first transmission shaft lever 1, a second transmission shaft lever 2 and a kidney-shaped intermediate gear 3 which is positioned between the first transmission shaft lever 1 and the second transmission shaft lever 2 and is in meshing transmission with the first transmission shaft lever 1 and the second transmission shaft lever 2.
Specifically, referring to fig. 1 to 3, the first transmission shaft rod 1 has a first axis along the first direction, and the first transmission shaft rod 1 is formed with a first bevel gear 11, and the rotation axis of the first bevel gear 11 is collinear with the first axis. The second transmission shaft lever 2 is arranged in parallel with the first transmission shaft lever 1 at intervals, so that the second transmission shaft lever 2 has a second axis parallel to the first axis, and a second bevel gear 21 is formed on the second transmission shaft lever 2, and the rotation axis of the second bevel gear 21 is collinear with the second axis. The waist-shaped intermediate gear 3 is positioned between the first transmission shaft 1 and the second transmission shaft 2, and the rotation axis of the waist-shaped intermediate gear 3 is perpendicular to the plane formed by the first axis and the second axis. The kidney-shaped intermediate gear 3 is a kidney-shaped whole, and has a long axis along the length direction and a short axis along the width direction (fig. 3 shows the long axis direction a and the short axis direction b of the kidney-shaped intermediate gear 3), and a first intermediate helical tooth portion 31 and a second intermediate helical tooth portion 32 are respectively formed at two ends of the kidney-shaped intermediate gear 3 along the long axis direction a, wherein the first intermediate helical tooth portion 31 is engaged with the first helical gear 11, and the second intermediate helical tooth portion 32 is engaged with the second helical gear 21, so that the first transmission shaft rod 1, the kidney-shaped intermediate gear 3 and the second transmission shaft rod 2 can form engaged transmission, that is, the rotation of the first transmission shaft rod 1 can drive the second transmission shaft 2 to rotate through the kidney-shaped intermediate gear 3 or the rotation of the second transmission shaft rod 2 can drive the first transmission shaft rod 1 to rotate through the kidney-shaped intermediate shaft gear 3. In addition, because waist shape intermediary gear 3 is rectangular shape, the size along its minor axis direction b is less than the size of major axis direction a, consequently, waist shape intermediary gear 3 can form along minor axis direction b's both sides and dodge the space, and then reduced waist shape intermediary gear 3 along the shared axial space of its minor axis direction b, compare in the annular intermediary gear who uses in current hinge, the hinge subassembly of this application adopts waist shape intermediary gear 3 can show and reduce used space, be favorable to the miniaturization of hinge subassembly and the frivolousization of notebook.
In the embodiment of the present application, preferably, as shown in fig. 1 to 3, both side surfaces of the kidney-shaped intermediate gear 3 along the minor axis direction b thereof are planar, and both side surfaces of the kidney-shaped intermediate gear 3 along the minor axis direction are disposed in parallel, so as to reduce the size of the kidney-shaped intermediate gear 3 along the minor axis direction b to the maximum extent.
In addition, in the embodiment of the present application, referring to fig. 1 to 3, the effective meshing portions of the first intermediate helical teeth 31 and the first helical gears 11 and the effective meshing portions of the second intermediate helical teeth 32 and the second helical gears 21 can enable the first transmission shaft rod 1 and the second transmission shaft rod 2 to rotate at least 180 degrees around the respective axes, so that when the hinge assembly of the embodiment of the present application is applied to an electronic device (e.g., a notebook computer), if the first transmission shaft rod 1 is connected to a display screen of the electronic device and the second transmission shaft rod 2 is connected to a keyboard of the electronic device, the keyboard and the display screen of the electronic device can respectively rotate 180 degrees, and the keyboard and the screen can be relatively turned over or buckled by 360 degrees.
It should be noted that the effective meshing portions of the first intermediate helical gear 31 and the first helical gear 11 and the second intermediate helical gear 32 and the effective meshing portion of the second helical gear 21 can be adjusted according to different requirements, for example, when the keyboard and the screen are required to respectively rotate 90 °, the size of the effective meshing portions of the first intermediate helical gear 31 and the first helical gear 11 and the size of the effective meshing portions of the second intermediate helical gear 32 and the second helical gear 21 can be further reduced compared with the case where the keyboard and the screen are required to respectively rotate 180 °, and the length of the kidney-shaped intermediate helical gear 3 in the minor axis direction b can be further reduced.
In addition, in the embodiment of the present application, it is preferable that the diameter of the addendum circle of the first intermediate helical tooth portion 31 is equal to the diameter of the addendum circle of the second intermediate helical tooth portion 32, and the diameter of the addendum circle of the first helical gear 11 is equal to the diameter of the addendum circle of the second helical gear 21, so as to simplify the process of machining each structural member of the hinge assembly.
It should be noted that the helix angles of the first helical gear 11 and the second helical gear 21 may be equal or different. Preferably, the helical angles of the first helical gear 11 and the second helical gear 21 are different, so that after the first helical gear 11 and the second helical gear 21 are meshed with the first intermediate helical gear portion 31 and the second intermediate helical gear portion 32, respectively, the rotational speeds of the first helical gear 11 and the second helical gear 21 are different, and the first transmission shaft lever 1 and the second transmission shaft lever 2 can be rotated in an interlocking manner at different angular speeds and in opposite rotational directions.
In this embodiment, preferably, referring to fig. 4, the hinge assembly further includes a mounting seat 4, and two shaft holes (not shown in the figure) with parallel center lines and a mounting cavity (not shown in the figure) located between the two shaft holes are formed on the mounting seat 4; the first transmission shaft lever 1 and the second transmission shaft lever 2 respectively pass through the two shaft holes, and the waist-shaped intermediate gear 3 is positioned in the mounting cavity. The mounting seat 4 provides a mounting space for the first transmission shaft lever 1, the second transmission shaft lever 2 and the waist-shaped intermediate gear 3, and provides support and positioning functions for the three, so that the three can be stably meshed for transmission.
Specifically, the first transmission shaft lever 1 and the second transmission shaft lever 2 are respectively located in two shaft holes, the first helical gear 11 on the first transmission shaft lever 1 and the second helical gear 21 on the second transmission shaft lever 2 are exposed to the installation cavity, and the kidney-shaped intermediate gear 3 is located in the installation cavity, so that the first helical gear 11 and the second helical gear 21 can be in mesh transmission with the kidney-shaped intermediate gear 3. In addition, as the axial length of the waist-shaped intermediate gear 3 in the minor axis direction b is reduced, the space corresponding to the mounting cavity in the mounting seat 4 is also reduced, so that the axial size of the mounting seat 4 is also reduced, and further, the axial size and the weight of the hinge assembly are reduced.
Preferably, referring to fig. 3, the middle gear 3 may be disposed in the mounting cavity by a positioning pin 41, an axis of the positioning pin 41 is perpendicular to a plane formed by rotation axes of the first transmission shaft 1 and the second transmission shaft 2, the middle gear 3 is sleeved on the positioning pin 41, and the rotation axis of the middle gear 3 is collinear with the axis of the positioning pin 41.
In this embodiment, preferably, referring to fig. 2, the hinge assembly includes a plurality of torsion adjusting sheets 51, the plurality of torsion adjusting sheets 51 are sleeved on the first transmission shaft 1 and the second transmission shaft 2 in a stacked manner, the first transmission shaft 1 and the second transmission shaft 2 respectively pass through the plurality of torsion adjusting sheets 51, the torsion adjusting sheets 51 are disposed to enable torsion to be generated between the first transmission shaft 1 and the second transmission shaft 2, and the torsion of the first transmission shaft 1 and the second transmission shaft 2 can be adjusted by adjusting the number of the torsion adjusting sheets 51.
In addition, in this embodiment, preferably, the hinge assembly may further include at least one plate-shaped cladding torsion member (not shown), and two ends of the plate-shaped cladding torsion member elastically and tightly wrap the first transmission shaft rod 1 and the second transmission shaft rod 2, respectively, so as to generate torsion between the first transmission shaft rod 1 and the second transmission shaft rod 2.
In addition, in the present embodiment, preferably, as shown in fig. 4, the hinge assembly may further include a first torsion spring group 53 and a second torsion spring group 54, and two tightening nuts 55; the first torsion spring group 53 and the second torsion spring group 54 are respectively provided through the first transmission shaft rod 1 and the second transmission shaft rod 2 for varying the torsion force to be applied to the first transmission shaft rod 1 and the second transmission shaft rod 2. For example, the first torsion spring group 53 and the second torsion spring group 54 have the same structure, and the first torsion spring group 53 and the second torsion spring group 54 may each include a plurality of disc-shaped spring pieces, i.e., a plurality of disc-shaped spring pieces are assembled closely stacked to each other, thereby providing rotational torsion to the first transmission shaft rod 1 and the second transmission shaft rod 2, respectively. Further, two tightening nuts 55 are respectively screwed on the ends of the first and second transmission shafts 1 and 2 to apply pressure to the plurality of first and second torsion spring groups 53 and 54.
Further, a spacer is preferably provided between the tightening nut 55 and the corresponding torsion spring group.
It should be noted that the hinge assembly may only include a plurality of torsion adjusting sheets 51, a plate-shaped cladding torsion member or torsion spring set and a tightening nut 55, or may include any two or three of the plurality of torsion adjusting sheets 51, the plate-shaped cladding torsion member and the torsion spring set and the tightening nut 55.
Example two
Embodiments of the present application also provide an electronic device, as shown in fig. 4, including the hinge assembly of the above embodiments and the first connection portion 6 and the second connection portion 7; wherein, first connecting portion 6 and first transmission shaft pole 1 fixed connection, second connecting portion 7 and second transmission shaft pole 2 fixed connection.
The electronic device can be a notebook computer comprising a display screen and a keyboard, the first connecting portion 6 is used for connecting the display screen of the notebook computer, and the second connecting portion 7 is used for connecting the keyboard of the notebook computer. The keyboard and the display screen of the notebook computer are connected through the corresponding connecting parts and the hinge assemblies, so that the keyboard and the display screen can be opened and closed relatively in 360 degrees. And because the axial dimension of the hinge assembly adopted by the notebook computer is reduced, the hinge installation space reserved for the notebook computer is reduced, and the notebook computer can be thinner and thinner.
It should be noted that the electronic device of this embodiment may also be a flip-type electronic device such as a folding mobile phone or an electronic book reader.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (9)
1. A hinge assembly, comprising:
a first transmission shaft having a first axis and formed with a first helical gear;
a second transmission shaft having a second axis parallel to the first axis and formed with a second helical gear;
a waist-shaped intermediate gear which is positioned between the first transmission shaft and the second transmission shaft and has a rotation axis which is perpendicular to a plane formed by the first axis and the second axis; and a first intermediate helical tooth part meshed with the first helical gear and a second intermediate helical tooth part meshed with the second helical gear are respectively formed at two ends of the waist-shaped intermediate gear along the long axis direction of the waist-shaped intermediate gear.
2. The hinge assembly of claim 1, wherein said first intermediate helical teeth and said first helical gear operative engagement portion and said second intermediate helical teeth and said second helical gear operative engagement portion are capable of rotating said first drive shaft and said second drive shaft at least 180 degrees about their respective axes.
3. The hinge assembly of claim 1, wherein the two sides of the kidney-shaped intermediate gear in the minor axis direction thereof are parallel.
4. The hinge assembly of claim 1, wherein a diameter of a tip circle of the first intermediate helical tooth portion is equal to a diameter of a tip circle of the second intermediate helical tooth portion.
5. The hinge assembly of claim 1, wherein a diameter of an addendum circle of the first helical gear is equal to a diameter of an addendum circle of the second helical gear.
6. The hinge assembly of any one of claims 1 to 5, further comprising a mount; the mounting seat is provided with two shaft holes with parallel central lines and a mounting cavity positioned between the two shaft holes; the first transmission shaft lever and the second transmission shaft lever respectively penetrate through the two shaft holes, and the waist-shaped intermediate gear is located in the installation cavity.
7. The hinge assembly of claim 6, further comprising:
the torsion adjusting pieces are stacked and sleeved on the first transmission shaft rod and the second transmission shaft rod, and elastically urge the first transmission shaft rod and the second transmission shaft rod; and/or
The two ends of the plate-shaped cladding torsion piece are respectively and elastically and tightly clad on the first transmission shaft lever and the second transmission shaft lever; and/or
The first torsion spring group, the second torsion spring group and the two screwing nuts are arranged on the base; the first torsion spring set and the second torsion spring set are respectively arranged on the first transmission shaft rod and the second transmission shaft rod in a penetrating way; the two screwing nuts are screwed on the ends of the first transmission shaft lever and the second transmission shaft lever respectively.
8. An electronic device comprising the hinge assembly of any one of claims 1 to 7 and first and second connection portions;
the first connecting part is fixedly connected with the first transmission shaft rod, and the second connecting part is fixedly connected with the second transmission shaft rod.
9. The electronic device of claim 8, wherein the electronic device is a notebook computer including a display screen and a keyboard, the first connecting portion is fixedly connected to the display screen, and the second connecting portion is fixedly connected to the keyboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922278928.7U CN211259338U (en) | 2019-12-17 | 2019-12-17 | Hinge assembly and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922278928.7U CN211259338U (en) | 2019-12-17 | 2019-12-17 | Hinge assembly and electronic device |
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| CN211259338U true CN211259338U (en) | 2020-08-14 |
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| CN201922278928.7U Active CN211259338U (en) | 2019-12-17 | 2019-12-17 | Hinge assembly and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205431A (en) * | 2020-09-18 | 2022-03-18 | 深圳市柔宇科技股份有限公司 | Hinge assembly, hinge synchronization structure and foldable electronic equipment |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205431A (en) * | 2020-09-18 | 2022-03-18 | 深圳市柔宇科技股份有限公司 | Hinge assembly, hinge synchronization structure and foldable electronic equipment |
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