CN109882498B - Double-shaft hinge and portable electronic device - Google Patents
Double-shaft hinge and portable electronic device Download PDFInfo
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- CN109882498B CN109882498B CN201910306408.4A CN201910306408A CN109882498B CN 109882498 B CN109882498 B CN 109882498B CN 201910306408 A CN201910306408 A CN 201910306408A CN 109882498 B CN109882498 B CN 109882498B
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Abstract
The application relates to the field of hinges, and relates to a biaxial hinge and a portable electronic device. The biaxial hinge includes: a first transmission shaft lever formed with a first helical gear; a second transmission shaft lever having a second bevel gear formed at a position opposite to the first bevel gear; the first intermediate helical gear and the second intermediate helical gear are respectively meshed with the first helical gear and the second helical gear, the spiral direction of the gear teeth of the first helical gear is the same as that of the gear teeth of the second helical gear, and the absolute values of the spiral angles of the gear teeth of the first helical gear and the spiral angles of the gear teeth of the second helical gear are different; the first and second drive shafts are capable of conjointly rotating at different angular speeds in opposite rotational directions. According to the biaxial hinge and the portable electronic device, the problem that the two front ends of the two shells are always in an aligned state when the portable electronic device applying the biaxial hinge is in a 360-degree closed state, so that the user operation is inconvenient can be solved.
Description
Technical Field
The present invention relates to the field of hinges, and in particular, to a biaxial hinge and a portable electronic device.
Background
With the increasing popularity of portable electronic devices such as notebook computers, folder type cellular phones, or electronic book readers, the personalized demands of users for such portable electronic devices are also increasing.
In general, a portable electronic device such as a notebook computer has two parts connected by two shafts, for example, a biaxial hinge, to swing the two parts of the portable electronic device, for example, when a display screen and a keyboard of the notebook computer are rotated from a 0-degree closed state facing each other to a 360-degree closed state facing away from each other, a front end of the display screen and a front end of the keyboard are always in an aligned state, and this makes it inconvenient for a user to operate when the display screen and the keyboard are rotated again toward the 0-degree closed state facing each other, which requires hands to be taken in the 360-degree closed state facing away from each other.
Disclosure of Invention
The invention aims to provide a biaxial hinge and a portable electronic device, and the problems of inconvenience for a user to operate caused by the fact that two front ends of two shells connected with each other through the biaxial hinge are always in an aligned state when the portable electronic device applying the biaxial hinge is in a 360-degree closed state can be solved by the biaxial hinge and the portable electronic device with the biaxial hinge.
A first aspect of the present invention provides a biaxial hinge, wherein the biaxial hinge includes:
a first transmission shaft formed with a first helical gear having a first axis of rotation;
a second transmission shaft lever having a second helical gear formed at a position opposite to the first helical gear; the second helical gear has a second axis of rotation; the first rotation axis is arranged in parallel with the second rotation axis, and
a first intermediate helical gear meshed with the first helical gear and a second intermediate helical gear meshed with the second helical gear, the first intermediate helical gear and the second intermediate helical gear being integrally formed and having a common third axis of rotation perpendicular to a plane defined by the first axis of rotation and the second axis of rotation;
the spiral direction of the gear teeth of the first helical gear is the same as the spiral direction of the gear teeth of the second helical gear, and the absolute value of the spiral angle of the gear teeth of the first helical gear is different from the absolute value of the spiral angle of the gear teeth of the second helical gear;
the first transmission shaft and the second transmission shaft are rotated in a coordinated manner in opposite rotational directions at different angular speeds from each other by meshing with the first intermediate helical gear and the second intermediate helical gear, respectively.
Preferably, the diameter of the addendum circle of the first intermediate helical gear is equal to the diameter of the addendum circle of the second intermediate helical gear, and the diameter of the addendum circle of the first helical gear is equal to the diameter of the addendum circle of the second helical gear.
Preferably, the diameter of the addendum circle of the first intermediate helical gear is equal to the diameter of the addendum circle of the second intermediate helical gear.
Preferably, the first intermediate helical gear is scalloped and has a first arcuate portion that engages the first helical gear, and the second intermediate helical gear is scalloped and has a second arcuate portion that engages the second helical gear.
Preferably, the first and second transmission shafts rotate at a relative rotation angle between 0 and 360 degrees, the rotation angle of the first and second intermediate bevel gears being between 0 and 180 degrees, the relative rotation angle being defined as the sum of the rotation angle of the first transmission shaft and the rotation angle of the second transmission shaft.
Preferably, the diameter of the addendum circle of the first helical gear is equal to the diameter of the addendum circle of the second helical gear.
Preferably, the biaxial hinge further comprises:
the support seat is provided with a first shaft hole, a second shaft hole and an installation space, wherein the first shaft hole and the second shaft hole are arranged at intervals, the first transmission shaft rod and the second transmission shaft rod respectively penetrate through the first shaft hole and the second shaft hole, and the first intermediate bevel gear and the second intermediate bevel gear are installed in the installation space;
the torsion gaskets are arranged in a penetrating manner and elastically cover the first transmission shaft rod and the second transmission shaft rod in a mutually stacked manner, and the torsion of the first transmission shaft rod and the second transmission shaft rod is adjusted by adjusting the number of the torsion gaskets; and/or
At least one plate-shaped coating torsion member with two ends respectively and elastically coated on the first transmission shaft rod and the second transmission shaft rod; and/or
The first torsion spring set, the second torsion spring set and the two fastening nuts are respectively arranged on the first transmission shaft rod and the second transmission shaft rod in a penetrating way and used for changing the torsion to be applied to the first transmission shaft rod and the second transmission shaft rod; the two fastening nuts are respectively screwed on the end parts of the first transmission shaft rod and the second transmission shaft rod so as to press the torsion gaskets, the first torsion spring group and the second torsion spring group.
Preferably, each of the plurality of torsion shims comprises:
a sleeve portion having a sleeve bore through which one of the first and second drive shafts passes;
a clamping shaft portion having a pair of bending arms clamping the other of the first transmission shaft and the second transmission shaft, end edges of the pair of bending arms being separated from each other; and
and a connecting portion connecting the sleeve portion and the clip portion.
According to a second aspect of the present invention there is provided a portable electronic device comprising a first housing, a second housing and a biaxial hinge as described in the previous figures;
the first housing is coupled to the first drive shaft via a first coupling plate, and the second housing is coupled to the second drive shaft via a second coupling plate.
Preferably, the orientation of the first housing and the second housing comprises: the first housing and the second housing are closed facing each other at a 0 degree angle, the first housing and the second housing are flat 180 degrees from each other, and the first housing and the second housing are closed facing away from each other at a 360 degree angle, the free ends of the first housing opposite the biaxial hinge and the free ends of the second housing opposite the biaxial hinge are offset from each other when the first housing and the second housing are in the 360 degree closed facing away from each other.
Compared with the prior art, the invention has the beneficial effects that:
according to the biaxial hinge provided by the embodiment of the invention, the spiral direction of the gear teeth of the first helical gear is the same as the spiral direction of the gear teeth of the second helical gear, but the absolute value of the spiral angle of the gear teeth of the first helical gear is different from the absolute value of the spiral angle of the gear teeth of the second helical gear, and the first helical gear and the second helical gear are meshed with the first intermediate helical gear and the second intermediate helical gear respectively, so that not only can the two shaft rods of the two-shaft hinge be in linkage and swing transmission in opposite directions, but also the transmission ratio of the two shaft rods of the two-shaft hinge can be changed.
In addition, according to the portable electronic device using the biaxial hinge as described above, it is possible to realize a swing in which the operator can easily operate by hand with the free ends of the first and second housings away from each other according to the misalignment of the free ends of the first and second housings with each other in a state in which the portable electronic device is in a 360-degree back-to-back closed state, thereby continuing to adjust the relative angle formed by the first and second housings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the major components of a biaxial hinge according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a first intermediate bevel gear and a second intermediate bevel gear of a two-axis hinge in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a biaxial hinge according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a torque pad according to an embodiment of the present invention; and
fig. 5 is a schematic view of a torque pad according to another embodiment of the present invention.
Reference numerals:
1-a first transmission shaft; 11-a first helical gear; 2-a second drive shaft; 21-a second helical gear; 3-a first intermediate helical gear; 31-a first arcuate portion; 4-a second intermediate helical gear; 41-a second arcuate portion; 5-a supporting seat; 51-a first shaft hole; 52-a second shaft hole; 53-installation space; 60-a first torque pad; 61-a second torque pad; 611-non-circular holes; 81-a first torsion spring set; 82-a second torsion spring set; 9-tightening the nut; 6' -torque shims; 61' -sleeve part; 62' -clip shaft portion; 63' -connecting part; 100-a first coupling plate; 200-a second coupling plate.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown.
The components of the embodiments of the present invention 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 invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured 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 should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Fig. 1 is a schematic view of main components of a biaxial hinge according to an embodiment of the present invention. Fig. 2 is a schematic view of a first intermediate bevel gear and a second intermediate bevel gear of a biaxial hinge according to an embodiment of the present invention. Fig. 3 is a schematic view of a biaxial hinge according to an embodiment of the present invention. Fig. 4 is a schematic view of a torque pad according to an embodiment of the present invention. Fig. 5 is a schematic view of a torque pad according to another embodiment of the present invention.
According to a first aspect of the present invention, there is provided a biaxial hinge, as shown in fig. 1 to 3, the biaxial hinge according to the present embodiment includes a first transmission shaft 1, a second transmission shaft 2, a first intermediate helical gear 3, a second intermediate helical gear 4, a support seat 5, a first torsion washer 60, a second torsion washer 61, a first torsion spring group 81 and a second torsion spring group 82, and two fastening nuts 9.
Hereinafter, the structure and actions of the above-described components of the biaxial hinge according to the present embodiment will be specifically described.
As shown in fig. 1 to 3, in an embodiment, the first transmission shaft 1 may be formed with a first bevel gear 11, where the bevel gear (also referred to as helical gear) refers to a bevel cylindrical gear (both in this description and in independent and dependent versions mentioned bevel gears may be understood as such, and will not be described further herein), the first bevel gear 11 may have a first normal face pitch circle (where the concept of normal face pitch circle may be understood as pitch circle without displacement, and the concept may be understood below with reference to such), and the second transmission shaft 2 may be formed with a second bevel gear 21 at a position opposite to the first bevel gear 11, the second bevel gear 21 may have a second normal face pitch circle and a second rotation axis. The first and second rotation axes are arranged in parallel, about which the first and second transmission shafts 1, 2 are rotatable, respectively. Further, in the embodiment, the first and second transmission shafts 1 and 2 may penetrate a first shaft hole 51 and a second shaft hole 52 of the support base 5, which will be described in detail below, respectively.
As shown in fig. 1 to 3, in the embodiment, the transmission of the first transmission shaft 1 and the second transmission shaft 2 is achieved by the mutual engagement of the first helical gear 11 and the second helical gear 21 with the first intermediate helical gear 3 and the second intermediate helical gear 4, respectively. By the first and second intermediate bevel gears 3 and 4 and the first and second bevel gears 11 and 21 according to the embodiment of the present invention, not only the transmission direction of the first and second transmission shafts 1 and 2 but also the transmission ratio of the first and second transmission shafts 1 and 2 can be changed, as described in detail below.
As shown in fig. 1 to 3, in an embodiment, the first intermediate helical gear 3 and the second intermediate helical gear 4 may have a third normal face reference circle and a fourth normal face reference circle, respectively, the radius of the third normal face reference circle being R1 and the radius of the fourth normal face reference circle being R2. The first intermediate helical gear 3 may be meshed with the first helical gear 11, and the second intermediate helical gear 4 may be meshed with the second helical gear 21.
Furthermore, in an embodiment, the first mediating helical gear 3 and the second mediating helical gear 4 may have a common third rotational axis O, the third rotational axis O being perpendicular to a plane defined by the first rotational axis and the second rotational axis. In the embodiment, the helical direction of the first helical gear 11 is the same as the helical direction of the second helical gear 21, but the absolute value of the helical angle of the teeth of the first helical gear 11 is different from the absolute value of the helical angle of the teeth of the second helical gear 21. In addition, in the embodiment, the diameter of the tip circle of the first helical gear 11 is equal to the diameter of the tip circle of the second helical gear 21, so that thinning of the notebook hinge and simplification of processing can be achieved.
In this regard, in the embodiment of the present application, for example, the diameter of the addendum circle of the first intermediate helical gear 3 and the diameter of the addendum circle of the second intermediate helical gear 4 may be equal to each other, and the diameter of the addendum circle of the first helical gear 11 and the diameter of the addendum circle of the second helical gear 21 may be equal to each other, so that thinning of the notebook hinge and simplification of processing may be achieved, but since the absolute value of the helix angle of the teeth of the first helical gear 11 and the absolute value of the helix angle of the teeth of the second helical gear 21 are different as described above, the first helical gear 11 and the second helical gear 21 are respectively meshed with the first intermediate helical gear 3 and the second intermediate helical gear 4, and thus the rotational speeds of the first helical gear 11 and the second helical gear 21 are different, that is, so that the first transmission shaft 1 and the second transmission shaft 2 are rotated in a coordinated manner in different angular speeds from each other, opposite rotational directions from each other, and ease of processing and thinness of the first helical gear 11 and the second helical gear 21 and the first intermediate helical gear 3 and the second helical gear 4 can also be ensured.
Further, if it is possible to simultaneously achieve only the diameter of the addendum circle of the first helical gear 11 and the diameter of the addendum circle of the second helical gear 21 to be equal, it is also possible to make the processing easier and the hinge thinner.
Further, it is also understood that, in the embodiment of the present application, it is apparent that since the absolute value of the helix angle of the teeth of the first helical gear 11 is not equal to the absolute value of the helix angle of the teeth of the second helical gear 21, the absolute value of the helix angle of the teeth of the first intermediate helical gear 3 is also not equal to the absolute value of the helix angle of the teeth of the second intermediate helical gear 4, respectively.
In the embodiment, the first intermediate helical gear 3 and the second intermediate helical gear 4 may be formed integrally, for example, one integral intermediate helical gear may be machined to have two portions of the first intermediate helical gear 3 and the second intermediate helical gear 4 and then fastened, or the first intermediate helical gear 3 and the second intermediate helical gear 4 may be integrally molded by machining or powder metallurgy, so long as the first intermediate helical gear 3 and the second intermediate helical gear 4 can be formed integrally, and the molding method of the first intermediate helical gear 3 and the second intermediate helical gear 4 is not limited.
With the biaxial hinge according to the embodiment of the present invention as described above, in the case where the absolute value of the helix angle of the teeth of the first helical gear 11 is not equal to the absolute value of the helix angle of the teeth of the second helical gear 21, the first transmission shaft 1 and the second transmission shaft 2 can be rotated in conjunction with each other at different angular speeds in opposite rotational directions from each other. That is, for example, when the first transmission shaft 1 rotates clockwise by a first predetermined angle, the second transmission shaft 2 rotates counterclockwise by a second predetermined angle different from the first predetermined angle.
In an embodiment according to the present invention, the first intermediate helical gear 3 may be fan-shaped and have a first arcuate portion 31 that meshes with the first helical gear 11, and similarly, the second intermediate helical gear 4 may also be fan-shaped and have a second arcuate portion 41 that meshes with the second helical gear 21. As shown in fig. 1 and 2, in the embodiment, the first intermediate helical gear 3 and the second intermediate helical gear 4 each have an approximately semicircular shape when viewed along the third rotation axis, in which case the first arc-shaped portion 31 and the second arc-shaped portion 41 are each approximately semicircular, however, not limited thereto, from the viewpoints of satisfying the meshing requirement and improving the rigidity and strength of the first intermediate helical gear 3 and the second intermediate helical gear 4, for example, from the viewpoints of weight reduction and cost saving and volume reduction, the first intermediate helical gear 3 and the second intermediate helical gear 4 may each be made to have a fan shape corresponding to a center angle of less than 180 degrees, for example.
Further, in the embodiment, the relative rotation angle of the first transmission shaft 1 and the second transmission shaft 2 is made to be between 0 degrees and 360 degrees by the first intermediate helical gear 3 and the second intermediate helical gear 4, wherein the rotation angle of the first intermediate helical gear 3 and the second intermediate helical gear 4 is between 0 degrees and 180 degrees, and the relative rotation angle is defined as the sum of the rotation angle of the first transmission shaft 1 and the rotation angle of the second transmission shaft 2. The biaxial hinge having the above-described structure will have a particularly advantageous effect when applied to a portable electronic device such as a notebook computer or the like. Of course, it is obvious that the above can alternatively be applied within less than these angular ranges.
In addition, as described above, in the embodiment, the diameter of the tip circle of the first helical gear 11 and the diameter of the tip circle of the second helical gear 21 can be equal, and by utilizing this feature, the thinnest hinge can be achieved most easily, so as to meet the demand for thinning of portable electronic devices such as notebook computers.
Further, in the embodiment, for example, the first helical gear 11, the second helical gear 21, the first intermediate helical gear 3, and the second intermediate helical gear 4 may be helical gears. The tooth shapes of the first helical gear 11, the second helical gear 21, the first intermediate helical gear 3 and the second intermediate helical gear 4 are not particularly limited as long as the transmission requirements of the first transmission shaft 1 and the second transmission shaft 2 can be achieved, whether the involute or other curve shape is obtained. In addition, in the embodiment, the diameter of the top circle of the first intermediate helical gear 3 and the diameter of the top circle of the second intermediate helical gear 4 may be equal, and/or the diameter of the top circle of the first intermediate helical gear 3 and the diameter of the top circle of the second intermediate helical gear 4 may be equal, so that the hinge is the thinnest, so as to adapt to the requirement of thinning portable electronic devices such as notebook computers.
Further, the structure and action of the other components of the biaxial hinge will be specifically described hereinafter.
As shown in fig. 3, in an embodiment, the support 5 may have a first shaft hole 51, a second shaft hole 52, and a mounting space 53 interposed between the first shaft hole 51 and the second shaft hole 52, the first and second transmission shafts 1 and 2 may penetrate the first and second shaft holes 51 and 52, respectively, and the first and second intermediate bevel gears 3 and 4 are mounted in the mounting space 53 such that the support 5 can provide supporting and positioning functions for the first and second transmission shafts 1 and 2, and the first and second intermediate bevel gears 3 and 4. The first and second transmission shafts 1 and 2 are exposed to the installation space 53 at the first and second shaft holes 51 and 52, respectively, so that the first and second intermediate bevel gears 3 and 4 can be engaged with bevel gears on the first and second transmission shafts 1 and 2, respectively, at the installation space 53. Further, in the embodiment, a fixing pin (not shown) may be inserted to a wall surface of the supporting seat 5, the first and second intermediate helical gears 3 and 4 are fitted over the fixing pin when the first and second intermediate helical gears 3 and 4 are installed in the installation space 53, and the first and second intermediate helical gears 3 and 4 may rotate about a central axis of the fixing pin as a third rotation axis.
For example, in the embodiment, the first transmission shaft lever 1 and the second transmission shaft lever 2 may be first inserted through the first shaft hole 51 and the second shaft hole 52 of the supporting seat 5, and then the first intermediate helical gear 3 and the second intermediate helical gear 4 formed as one body may be placed at a specific position in the installation space 53 of the supporting seat 5 and fitted over the fixing pin (not shown in the drawing) as described above, and then brought into contact engagement with the first helical gear 11 and the second helical gear 21, thus achieving the assembly of the first transmission shaft lever 1, the second transmission shaft lever 2, the first intermediate helical gear 3 and the second intermediate helical gear 4 and the predetermined inter-engagement transmission.
As shown in fig. 3 and 4, in the embodiment, the plurality of first torsion shims 60 and the plurality of second torsion shims 61, the first torsion spring group 81 and the second torsion spring group 82, and the two fastening nuts 9 are used together as a torsion adjustment mechanism.
Specifically, a plurality of first torsion shims 60 and a plurality of second torsion shims 61 may be provided through the first transmission shaft 1 and the second transmission shaft 2 in a stacked manner with each other. In the embodiment shown in fig. 3 and 4, the first torsion shims 60 and the second torsion shims 61 are alternately arranged, the plurality of first torsion shims 60 are arranged spaced apart from each other along the extending direction of the first transmission shaft 1 and the second transmission shaft 2, and the plurality of second torsion shims 61 are also arranged spaced apart from each other along the extending direction of the first transmission shaft 1 and the second transmission shaft 2, the second torsion shims 61 being rotatable in synchronization with the first transmission shaft 1 and the second transmission shaft 2.
Next, as shown in fig. 3, the first torsion spring set 81 and the second torsion spring set 82 may be respectively inserted through the first transmission shaft 1 and the second transmission shaft 2, for changing the torsion force to be applied to the first transmission shaft 1 and the second transmission shaft 2. For example, the first torsion spring group 81 and the second torsion spring group 82 have the same structure, and only the first torsion spring group 81 will be described as an example. Specifically, the first torsion spring group 81 may include, for example, a plurality of disc springs, that is, a plurality of disc springs assembled closely stacked to each other so as to provide a rotational torsion force to the first transmission shaft 1, that is, in the embodiment of the present invention, the first torsion spring group 81 and the second torsion spring group 82 are used as main torsion sources.
Next, as shown in fig. 3, two fastening nuts 9 may be screwed on the ends of the first and second transmission shafts 1 and 2, respectively, to press the plurality of first and second torsion shims 60 and 61 and the first and second torsion spring sets 81 and 82. As an example, the fastening nut 9 may be screwed into a specified or desired torque level by means of a wrench or the like.
In addition, that is, the two fastening nuts 9 are respectively screwed on the ends of the first transmission shaft 1 and the second transmission shaft 2, thereby applying forces to the first torsion spring group 81, the second torsion spring group 82, and the plurality of first torsion shims 60 and the second torsion shims 61, respectively, thereby applying axial tightening to the first transmission shaft 1, the second transmission shaft 2, so that friction is generated between any adjacent two of the plurality of first torsion shims 60 and the plurality of second torsion shims 61.
Further, washers may be added to the fastening nuts 9 and the corresponding torsion spring sets.
In the embodiment shown in fig. 4, each of the plurality of second torque shims 61 has a non-circular hole 611, and at least a portion of the first and second drive shafts 1, 2 are formed as non-circular shaft portions, such that the non-circular shaft portions mate with the non-circular holes 611 such that the first drive shaft 1 rotates in synchronization with the plurality of second torque shims 61 and the second drive shaft 2 rotates in synchronization with the plurality of second torque shims 61, i.e., the first drive shaft 1 and the second drive shaft 2 are capable of rotating their corresponding plurality of second torque shims 61.
The specific form of the mechanism providing torsion is not limited as long as the torsion washer enables adjustment of the torsion of the first and second transmission shafts.
In addition, the plurality of torque shims may be formed in other ways, as described in detail below. In another embodiment of the torque pad, as shown in fig. 5, each of the plurality of torque pads 6 'may include a sleeve portion 61', a clip portion 62', and a connection portion 63'. The sleeve portion 61 'has a sleeve hole through which one of the first transmission shaft 1 and the second transmission shaft 2 penetrates the sleeve hole of the sleeve portion 61'; the clamp shaft portion 62 'has a pair of bending arms that clamp the other of the first transmission shaft 1 and the second transmission shaft 2, end edges of the pair of bending arms are separated from each other, and the clamp shaft portion 62' elastically clamps the other of the first transmission shaft 1 and the second transmission shaft 2; the connection portion 63' connects the sleeve shaft portion 61' and the clip shaft portion 62'. The plurality of torque washers 6 'in this form are of the same size and shape as each other, so that the torque washers 6' can be selectively increased or decreased to adjust the torque force required by the first and second drive shafts 1, 2.
Further, in the embodiment shown in fig. 5, the clip shaft portion 62' of only one side of the plurality of torsion shims 6' has an opening, while the sleeve shaft portion 61' does not have an opening. However, without being limited thereto, both sides of the torque pad may be formed with a grip portion having an opening so as to apply radial tightening to both the first transmission shaft 1 and the second transmission shaft 2.
Furthermore, in the embodiment shown in fig. 3 and 4, the first and second torque washers 60, 61 act on the first and second transmission shafts 1, 2 by axial direction, whereas in the embodiment shown in fig. 5, the plurality of torque washers 6' act on the first and second transmission shafts 1, 2 by radial wrapping.
In addition, the biaxial hinge may further include at least one plate-shaped coating torsion member having both ends elastically and tightly coated on the first and second transmission shafts, respectively. However, the biaxial hinge may include only the plate-shaped sheathing torsion member instead of the torsion washer, torsion spring set, and fastening nut described above according to actual design needs.
That is, in embodiments, the biaxial hinge may include any one or combination of a plurality of torsion shims, a plate-like cladding torsion member, and a torsion spring set and a fastening nut. Specifically, the biaxial hinge may include any one or combination of a plurality of torsion shims, a plate-like cladding torsion member, and a torsion spring set and a fastening nut, according to actual design needs.
Hereinafter, advantageous effects produced when the biaxial hinge as described above is applied to a portable electronic device will be described.
Further, according to a second aspect of the present invention, there is provided a portable electronic device comprising the biaxial hinge as described above, a first housing and a second housing. As shown in fig. 1 and 3, a first coupling plate 100 is fixedly connected to a side of the biaxial hinge first transmission shaft 1 opposite to the side of the fastening nut 9, and a second coupling plate 200 is fixedly connected to a side of the biaxial hinge second transmission shaft 2 opposite to the side of the fastening nut 9. Although the first and second housings are not shown in the figures, it is understood that in an embodiment the first housing is coupled to the first transmission shaft 1 via a first coupling plate 100 and the second housing is coupled to the second transmission shaft 2 via a second coupling plate 200.
In addition, the portable electronic device as described above can be opened and closed by 360 degrees. Specifically, the orientation of the first housing and the second housing includes: the first housing and the second housing are closed facing each other at 0 degrees, the first housing and the second housing are flat 180 degrees to each other, and the first housing and the second housing are closed facing away from each other at 360 degrees. For example, when the first housing and the second housing are closed in 360 degrees facing away from each other, the free end of the first housing opposite the biaxial hinge and the free end of the second housing opposite the biaxial hinge are offset from each other.
That is, according to the embodiment, the first transmission shaft 1 and the second transmission shaft 2 are rotated in association with each other in opposite rotational directions at different angular speeds from each other by the difference between the helix angle of the teeth of the first helical gear 11 and the helix angle of the teeth of the second helical gear 21, which is equivalent to the misalignment of the first housing and the second housing of the portable electronic device.
For example, in the case where the portable electronic device is a notebook computer, the first housing may be a keyboard housing, the second housing may be a display housing, and in a state where the keyboard housing and the display housing of the notebook computer are in 360 degrees facing away from each other, an operator may easily operate to rotate the keyboard housing and the display housing according to the fact that the free ends of the keyboard housing and the display are offset from each other.
For example, where the portable electronic device is a folding cell phone or tablet device, the first and second housings may each be display housings, the first and second housings may together form a larger display when the first and second housings are in a 180 degree flat state, and the portable electronic device, such as a folding cell phone or tablet device, may provide a relatively smaller display when the first and second housings are in a 360 degree back-to-back closed state, and the operator may easily operate to rotate the first and second housings based on the free ends of the first and second housings being offset from each other when such a state is desired.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. A biaxial hinge, characterized in that it comprises:
a first transmission shaft formed with a first helical gear having a first axis of rotation;
a second transmission shaft lever having a second helical gear formed at a position opposite to the first helical gear; the second helical gear has a second axis of rotation; the first rotation axis is arranged in parallel with the second rotation axis, and
a first intermediate helical gear meshed with the first helical gear and a second intermediate helical gear meshed with the second helical gear, the first intermediate helical gear and the second intermediate helical gear being integrally formed and having a common third axis of rotation perpendicular to a plane defined by the first axis of rotation and the second axis of rotation;
the spiral direction of the gear teeth of the first helical gear is the same as the spiral direction of the gear teeth of the second helical gear, and the absolute value of the spiral angle of the gear teeth of the first helical gear is different from the absolute value of the spiral angle of the gear teeth of the second helical gear; the diameter of the top circle of the first bevel gear is equal to that of the top circle of the second bevel gear;
the first transmission shaft and the second transmission shaft are rotated in a coordinated manner in opposite rotational directions at different angular speeds from each other by meshing with the first intermediate helical gear and the second intermediate helical gear, respectively.
2. The biaxial hinge according to claim 1, wherein the diameter of the addendum circle of the first intermediate helical gear is equal to the diameter of the addendum circle of the second intermediate helical gear.
3. The biaxial hinge of claim 1, wherein the hinge is formed of a material selected from the group consisting of,
the first intermediate bevel gear is scalloped and has a first arcuate portion that engages the first bevel gear, and the second intermediate bevel gear is scalloped and has a second arcuate portion that engages the second bevel gear.
4. The biaxial hinge of claim 3, wherein the hinge is formed of a material having a shape of a thin film,
the first and second drive shafts rotate at a relative rotation angle between 0 and 360 degrees, the rotation angle of the first and second intermediate bevel gears being between 0 and 180 degrees, the relative rotation angle being defined as the sum of the rotation angle of the first drive shaft and the rotation angle of the second drive shaft.
5. The biaxial hinge according to any one of claims 1 to 4, further comprising:
the support seat is provided with a first shaft hole, a second shaft hole and an installation space, wherein the first shaft hole and the second shaft hole are arranged at intervals, the first transmission shaft rod and the second transmission shaft rod respectively penetrate through the first shaft hole and the second shaft hole, and the first intermediate bevel gear and the second intermediate bevel gear are installed in the installation space;
the torsion gaskets are arranged in a penetrating manner and elastically cover the first transmission shaft rod and the second transmission shaft rod in a mutually stacked manner, and the torsion of the first transmission shaft rod and the second transmission shaft rod is adjusted by adjusting the number of the torsion gaskets; and/or
At least one plate-shaped coating torsion member with two ends respectively and elastically coated on the first transmission shaft rod and the second transmission shaft rod; and/or
The first torsion spring set, the second torsion spring set and the two fastening nuts are respectively arranged on the first transmission shaft rod and the second transmission shaft rod in a penetrating way and used for changing the torsion to be applied to the first transmission shaft rod and the second transmission shaft rod; the two fastening nuts are respectively screwed on the end parts of the first transmission shaft rod and the second transmission shaft rod so as to press the torsion gaskets, the first torsion spring group and the second torsion spring group.
6. The biaxial hinge of claim 5, wherein each of the plurality of torsional shims comprises:
a sleeve portion having a sleeve bore through which one of the first and second drive shafts passes;
a clamping shaft portion having a pair of bending arms clamping the other of the first transmission shaft and the second transmission shaft, end edges of the pair of bending arms being separated from each other; and
and a connecting portion connecting the sleeve portion and the clip portion.
7. A portable electronic device comprising a first housing, a second housing, and the biaxial hinge according to any one of claims 1 to 6;
the first housing is coupled to the first drive shaft via a first coupling plate, and the second housing is coupled to the second drive shaft via a second coupling plate.
8. The portable electronic device of claim 7, wherein the portable electronic device comprises a portable electronic device,
the orientation of the first housing and the second housing comprises: the first housing and the second housing are closed facing each other at a 0 degree angle, the first housing and the second housing are flat 180 degrees from each other, and the first housing and the second housing are closed facing away from each other at a 360 degree angle, the free ends of the first housing opposite the biaxial hinge and the free ends of the second housing opposite the biaxial hinge are offset from each other when the first housing and the second housing are in the 360 degree closed facing away from each other.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910306408.4A CN109882498B (en) | 2019-04-16 | 2019-04-16 | Double-shaft hinge and portable electronic device |
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| CN201910306408.4A CN109882498B (en) | 2019-04-16 | 2019-04-16 | Double-shaft hinge and portable electronic device |
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| CN109882498A CN109882498A (en) | 2019-06-14 |
| CN109882498B true CN109882498B (en) | 2024-03-12 |
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| CN109882498A (en) | 2019-06-14 |
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