CN209908977U

CN209908977U - Double-shaft hinge and portable electronic equipment

Info

Publication number: CN209908977U
Application number: CN201920572297.7U
Authority: CN
Inventors: 曲波
Original assignee: Taizhou Stronkin Electronic Co Ltd
Current assignee: Taizhou Stronkin Electronic Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-07
Anticipated expiration: 2029-04-24

Abstract

The utility model relates to a hinge field relates to a two-axis hinge and portable electronic equipment. The biaxial hinge includes: a first drive shaft provided with a first gear; a second drive shaft provided with a second gear at a position opposite to the first gear; and a first intermediate gear and a second intermediate gear having different diameters of normal surface reference circles, the first intermediate gear being engaged with the first gear, the second intermediate gear being engaged with the second gear, the first intermediate gear and the second intermediate gear being formed integrally and having a common rotation axis; the first and second transmission shafts are rotated in conjunction with each other at different angular velocities and in opposite rotational directions by the first and second intermediate gears. According to the utility model discloses a two-axis hinge and portable electronic equipment, enough the front end of solving two casings when using two-axis hinge's portable electronic equipment to be in 360 degrees closure states is in the problem of aligning the state all the time in order to lead to user operation inconvenience.

Description

Double-shaft hinge and portable electronic equipment

Technical Field

The utility model relates to a hinge field, in particular, relates to a two-axis hinge and portable electronic equipment.

Background

With the increasing popularity of portable electronic devices such as notebook computers, folder phones, or electronic book readers, the personalization requirements of users for such portable electronic devices are also increasing.

Typically, a portable electronic device, such as a notebook computer, has two parts connected by, for example, a two-axis hinge. The two parts of the portable electronic device are driven to swing through the two rod shafts respectively penetrating through the two-axis hinge, for example, when a display screen and a keyboard of a notebook computer rotate from a 0-degree closed state facing each other to a 360-degree closed state facing away from each other, the front end of the display screen and the front end of the keyboard are always in an aligned state, and thus when the display screen and the keyboard are required to rotate towards the 0-degree closed state facing each other again when being in the 360-degree closed state facing away from each other, operation inconvenience of a user is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-axis hinge and portable electronic equipment, utilize two-axis hinge and having two-axis hinge's portable electronic equipment can solve and be in the problem of the inconvenient in order to lead to user operation through the alignment state all the time of two casings that connect each other through two-axis hinge when the portable electronic equipment who uses above-mentioned two-axis hinge is in 360 degrees closure states.

A first aspect of the present invention provides a biaxial hinge, wherein, the biaxial hinge includes:

a first drive shaft provided with a first gear wheel having a first normal reference circle and a first axis of rotation;

a second drive shaft provided with a second gear at a position opposite to the first gear; the second gear has a second normal reference circle and a second axis of rotation; the first axis of rotation is arranged parallel to the second axis of rotation, an

A first idler gear and a second idler gear having a third normal reference circle and a fourth normal reference circle, respectively, and a diameter of the third normal reference circle being unequal to a diameter of the fourth normal reference circle, the first idler gear being in mesh with the first gear and the second idler gear being in mesh with the second gear, the first idler gear and the second idler gear being integrally formed and having a common third axis of rotation, the third axis of rotation being perpendicular to a plane defined by the first axis of rotation and the second axis of rotation; the shortest distance of the third rotation axis from the first rotation axis is different from the shortest distance of the third rotation axis from the second rotation axis;

the first and second transmission shaft shafts are rotated in conjunction with each other at different angular velocities from each other and in opposite rotational directions by the first and second intermediate gears.

Preferably, the diameter of the third normal surface pitch circle of the first intermediate gear is larger than the diameter of the fourth normal surface pitch circle of the second intermediate gear, and the diameter of the tooth top circle of the first intermediate gear is larger than the diameter of the tooth top circle of the second intermediate gear.

Preferably, the first idler gear is sector shaped and has a first arcuate portion in mesh with the first gear, and the second idler gear is sector shaped and has a second arcuate portion in mesh with the second gear.

Preferably, the first idler gear and the second idler gear are each semi-circular in shape when viewed along the third axis of rotation.

Preferably, the first drive shaft and the second drive shaft rotate with a relative rotation angle between 0 degrees and 360 degrees, the rotation angle of the first intermediate gear and the second intermediate gear being between 0 degrees 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.

Preferably, the diameter of the first normal surface reference circle is equal to the diameter of the second normal surface reference circle.

Preferably, the diameter of the addendum circle of the first gear is equal to the diameter of the addendum circle of the second gear, and the module of the first gear is equal to the module of the second gear.

Preferably, each of the first gear, the second gear, the first intermediate gear and the second intermediate gear is a helical gear.

Preferably, the biaxial hinge further comprises:

a support seat having a first shaft mounting hole, a second shaft mounting hole and a mounting space between the first shaft mounting hole and the second shaft mounting hole, the first transmission rod shaft and the second transmission rod shaft respectively penetrating through the first shaft mounting hole and the second shaft mounting hole, the first intermediate gear and the second intermediate gear being mounted in the mounting space;

a plurality of torsion tabs passing through the first drive shaft and the second drive shaft in a stacked manner, the torsion of the first drive shaft and the second drive shaft being adjusted by adjusting the number of the torsion tabs; and/or

At least one plate-shaped wrapping piece with two ends respectively and elastically and tightly wrapping the first transmission rod shaft and the second transmission rod shaft; and/or

The first torsion spring set and the second torsion spring set are respectively arranged on the first transmission rod shaft and the second transmission rod shaft in a penetrating mode, the torsion to be applied to the first transmission rod shaft and the second transmission rod shaft is changed, and the two fastening nuts are respectively screwed on the end portions of the first transmission rod shaft and the second transmission rod shaft to press the first torsion spring set and the second torsion spring set.

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 above;

the first housing is coupled to the first drive axle via a first connecting plate, the second housing is coupled to the second drive axle via a second connecting plate,

the orientation of the first housing and the second housing comprises: the first housing and the second housing are closed facing each other at 0 degrees, the first housing and the second housing are flat at 180 degrees and the first housing and the second housing are closed facing each other at 360 degrees, 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 when the first housing and the second housing are closed facing each other at 360 degrees.

Compared with the prior art, the beneficial effects of the utility model are that:

according to the utility model discloses a two-axis hinge that embodiment provided can not only change the direction of transmission of two axostylus axostyles of two-axis hinge through first intermediary gear and second intermediary gear, but also can change the drive ratio of two axostylus axostyles of two-axis hinge.

Further, according to the portable electronic device to which the biaxial hinge as described above is applied, it is possible to realize that in a state where the portable electronic device is closed back to back in 360 degrees, an operator can easily operate to rotate the first housing and the second housing by shifting the free end of the first housing and the free end of the second housing from each other, thereby continuing to adjust the relative angle formed by the first housing and the second housing.

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 the main components of a biaxial hinge according to an embodiment of the present invention;

fig. 2 is a schematic view of a first intermediary gear and a second intermediary gear of a dual axis hinge according to an embodiment of the invention;

fig. 3 is a schematic view of a dual axis hinge according to an embodiment of the present invention;

fig. 4 is a schematic view of a torsion tab according to an embodiment of the present invention.

Icon: 1-a first drive shaft; 11-a first gear; 2-a second drive shaft; 21-a second gear; 3-a first intermediate gear; 31-a first arc-shaped portion; 4-a second intermediate gear; 41-a second arc-shaped portion; 5-a support seat; 51-first shaft mounting hole; 52-second shaft mounting hole; 53-installation space; 6-a first torsion tab; 7-a second torsion adjustment sheet; 70-non-circular holes; 81-a first set of torsion springs; 82-a second torsion spring set; 9-fastening a nut; 100-a first connection plate; 200-a second connecting plate.

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.

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

Fig. 1 is a schematic view of the main components of a biaxial hinge according to an embodiment of the present invention. Fig. 2 is a schematic view of a first intermediary gear and a second intermediary gear of a dual axis hinge according to an embodiment of the invention. Fig. 3 is a schematic view of a dual axis hinge according to an embodiment of the present invention. Fig. 4 is a schematic view of a torsion tab according to an 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 gear 3, a second intermediate gear 4, a support base 5, a plurality of torsion adjustment sheets (a first torsion adjustment sheet 6 and a second torsion adjustment sheet 7), a first torsion spring sheet group 81 and a second torsion spring sheet group 82, and two fastening nuts 9.

Hereinafter, the structure and action of the above-described components of the biaxial hinge according to the present embodiment will be described in detail.

As shown in fig. 1 to 3, in an embodiment, the first transfer lever shaft 1 may be provided with a first gear wheel 11, the first gear wheel 11 may have a first normal reference circle and a first rotation axis, and the second transfer lever shaft 2 may be provided with a second gear wheel 21 at a position opposite to the first gear wheel 11, the second gear wheel 21 may have a second normal reference circle and a second rotation axis. The first and second axes of rotation about which the first and

second drive shaft

1, 2 can rotate, respectively, are arranged in parallel. Further, in the embodiment, the first and second

drive link shafts

1 and 2 may respectively penetrate through first and second

shaft mounting holes

51 and 52 of a support base 5, which will be described below in detail.

As shown in fig. 1 to 3, in the embodiment, the transmission of the first and

second transmission shaft

1, 2 is realized by the first and

second gears

11, 21 and the first and second

intermediate gears

3, 4, respectively. Through first intermediary gear 3 and second intermediary gear 4 according to the embodiment of the present invention, not only can the transmission direction of these two shafts be changed, but also the transmission ratio of these two shafts can be changed, as described in detail below.

As shown in fig. 1 to 3, in the embodiment, the first intermediate gear 3 and the second intermediate gear 4 may have a third normal reference circle and a fourth normal reference circle, respectively, and the diameter of the third normal reference circle is not equal to the diameter of the fourth normal reference circle, and in the embodiment shown in fig. 1 and 2, the diameter of the third normal reference circle is greater than the diameter of the fourth normal reference circle, that is, the radius R1 of the third normal reference circle is greater than the radius R2 of the fourth normal reference circle. The first intermediate gear 3 may mesh with the first gear 11 and the second intermediate gear 4 may mesh with the second gear 21, i.e. the third normal surface reference circle of the first intermediate gear 3 corresponds to the first normal surface reference circle of the first gear 11 and the fourth normal surface reference circle of the second intermediate gear 4 corresponds to the second normal surface reference circle of the second gear 21. Further, in the embodiment, the diameter of the addendum circle of the first idler gear 3 may be larger than that of the second idler gear 4.

Note that, here, the concept of the normal reference circle can be understood as the concept of the pitch circle without displacement, and hereinafter, such a concept can be understood with reference to the following.

Furthermore, in an embodiment, the first and second idler gears 3, 4 may have a common third axis of rotation O, which is perpendicular to the plane defined by the first and second axes of rotation. In an embodiment, the shortest distance of the third rotation axis O from the first rotation axis is different from the shortest distance of the third rotation axis O from the second rotation axis, and in an embodiment, the shortest distance of the third rotation axis O from the first rotation axis may be greater than the shortest distance of the third rotation axis O from the second rotation axis. With this construction, the transmission ratio of the first drive shaft 1 and the second drive shaft 2 can be changed.

In the embodiment, the first intermediate gear 3 and the second intermediate gear 4 may be formed integrally, for example, a single intermediate gear may be machined to have two parts of the first intermediate gear 3 and the second intermediate gear 4, or the first intermediate gear 3 and the second intermediate gear 4 may be integrally formed by casting, and the formation of the first intermediate gear 3 and the second intermediate gear 4 is not limited to the formation of the first intermediate gear 3 and the second intermediate gear 4 as long as the first intermediate gear 3 and the second intermediate gear 4 can be formed integrally.

With the first and second

intermediate gears

3 and 4 according to the embodiment of the present invention as described above, the first and

second spindle shafts

1 and 2 can be rotated in conjunction with each other at different angular velocities and in opposite rotational directions from each other. That is, for example, when the first drive spindle 1 is rotated clockwise by a first predetermined angle, the second drive spindle 2 is rotated counterclockwise by a second predetermined angle different from the first predetermined angle.

In the embodiment according to the present invention, the first intermediate gear 3 may have a fan shape and have a first arc portion 31 engaged with the first gear 11, and similarly, the second intermediate gear 4 may also have a fan shape and have a second arc portion 41 engaged with the second gear 21. As shown in fig. 1 and 2, in the embodiment, the first intermediate gear 3 and the second intermediate gear 4 are each semicircular in shape when viewed along the third rotation axis, in which case the first arc portion 31 and the second arc portion 41 are each semicircular, but not limited thereto, and from the viewpoint of improving the rigidity and strength of the first intermediate gear and the second intermediate gear, for example, the first intermediate gear having a larger normal reference circle diameter may be made to have a sector shape corresponding to a circle center angle of more than 180 degrees, while the second intermediate gear having a smaller normal reference circle diameter may be made to have a sector shape corresponding to a circle center angle of less than 180 degrees; in addition, from the viewpoint of weight reduction and cost saving, for example, the first intermediate gear and the second intermediate gear may be formed in a sector shape having a corresponding circle center angle of less than 180 degrees.

Furthermore, in an embodiment, the first and

second transmission shaft

1, 2 may be rotated with a relative rotation angle between 0 and 360 degrees, wherein the rotation angle of the first and second

intermediate gears

3, 4 is between 0 and 180 degrees, the relative rotation angle being 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 structure is particularly advantageous when applied to portable electronic devices such as notebook computers.

Further, assuming that the first normal surface reference circle of the first gear and the normal surface reference circle of the second gear are the same, the larger the difference between the radius of the third normal surface reference circle of the first relay gear 3 and the radius of the fourth normal surface reference circle of the second relay gear 4 is, the larger the difference between the maximum rotation angle of the first propeller shaft 1 and the maximum rotation angle of the second propeller shaft 2 is.

In addition, in the embodiment, the diameter of the first normal reference circle and the diameter of the second normal reference circle may be equal, the diameter of the addendum circle of the first gear 11 and the diameter of the addendum circle of the second gear 21 are equal, and the module of the first gear 11 and the module of the second gear 21 are equal. In addition, when the module of the first gear 11 is equal to that of the second gear 21, the gear processing is relatively simple and the cost is low.

Further, in the embodiment, for example, the first gear 11, the second gear 21, the first intermediate gear 3, and the second intermediate gear 4 may employ helical gears, that is, helical gears. The gear shapes of the first gear 11, the second gear 21, the first intermediate gear 3 and the second intermediate gear 4 are not particularly limited as long as the transmission requirements of the first drive shaft 1 and the second drive shaft 2 can be achieved. Further, in the embodiment, the meshing gear tooth shape and the module adopted by the first gear and the first intermediate gear that mesh with each other and the meshing gear tooth shape and the module adopted by the second gear and the second intermediate gear that mesh with each other are used.

Further, the structures and actions of the other components of the biaxial hinge will be described in detail hereinafter.

As shown in fig. 3, in an embodiment, the support base 5 may have a first shaft mounting hole 51, a second shaft mounting hole 52 and a mounting space 53 between the first shaft mounting hole 51 and the second shaft mounting hole 52, the first transmission shaft 1 and the second transmission shaft 2 may respectively penetrate through the first shaft mounting hole 51 and the second shaft mounting hole 52, and the first idler gear 3 and the second idler gear 4 are mounted in the mounting space 53, so that the support base 5 can provide a supporting and positioning function for the first transmission shaft 1, the second transmission shaft 2, the first idler gear 3 and the second idler gear 4. The first and

second propeller shafts

1 and 2 are exposed to the mounting space 53 at the first and second

shaft mounting holes

51 and 52, respectively, so that the first and second idler gears 3 and 4 can mesh with the first and second gears on the first and

second propeller shafts

1 and 2, respectively, at the mounting space 53. In addition, in the embodiment, a fixing pin (not shown) may be inserted into the wall surface of the support base 5, the first intermediate gear 3 and the second intermediate gear 4 are fitted over the fixing pin when the first intermediate gear 3 and the second intermediate gear 4 are installed in the installation space 53, and the first intermediate gear 3 and the second intermediate gear 4 may rotate with the central axis of the fixing pin as a third rotation axis.

For example, in the embodiment, the first transmission shaft 1 and the second transmission shaft 2 may be first inserted through the first shaft mounting hole 51 and the second shaft mounting hole 52 of the support base 5, and then the first intermediate gear 3 and the second intermediate gear 4, which are integrally formed, may be placed at a specific position in the mounting space 53 of the support base 5 and fitted over the fixing pin (not shown in the drawings) as described above, and then brought into contact engagement with the first gear 11 and the second gear 21, thereby achieving the assembly of the first transmission shaft 1, the second transmission shaft 2, the first intermediate gear 3, and the second intermediate gear 4 and the predetermined intermeshing transmission.

As shown in fig. 3 and 4, in the embodiment, a plurality of first torsion tabs 6 and a plurality of second torsion tabs 7, a first torsion spring set 81 and a second torsion spring set 82, and two fastening nuts 9 are used together as a torsion adjusting mechanism.

In particular, a plurality of first torsion tabs 6 and a plurality of second torsion tabs 7 may be threaded through the first drive axle 1 and the second drive axle 2 in a stacked manner on each other. In the exemplary embodiment shown in fig. 3 and 4, the first torsion tabs 6 and the second torsion tabs 7 are arranged alternately, a plurality of first torsion tabs 6 being arranged at a distance from one another in the direction of extension of the first drive shaft 1 and the second drive shaft 2, and a plurality of second torsion tabs 7 likewise being arranged at a distance from one another in the direction of extension of the first drive shaft 1 and the second drive shaft 2, the second torsion tabs 7 being rotatable synchronously with the first drive shaft 1 and the second drive shaft 2.

Next, as shown in fig. 3, a first torsion spring set 81 and a second torsion spring set 82 may be respectively inserted through the first transmission shaft 1 and the second transmission shaft 2 for changing torsion forces 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 plate set 81 may include, for example, a plurality of disc springs, that is, a plurality of disc springs are assembled in close stack with each other, so as to provide the rotating torsion to the first transmission shaft 1, that is, in the embodiment of the present invention, the first torsion spring plate set 81 and the second torsion spring plate set 82 are used as the 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 shaft

1 and 2, respectively, to press the plurality of first and

second torsion tabs

6 and 7 and the first and second

torsion spring groups

81 and 82. As an example, the fastening nut 9 may be screwed to a specified or desired torque level by means of a tool such as a wrench.

Furthermore, that is, two fastening nuts 9 are screwed on the ends of the first drive spindle shaft 1 and the second drive spindle shaft 2, respectively, so as to apply forces to the first torsion spring plate group 81, the second torsion spring plate group 82, and the plurality of first torsion tabs 6 and the second torsion tabs 7, respectively, so as to apply axial urging to the first drive spindle shaft 1, the second drive spindle shaft 2, so that a frictional force is generated between any adjacent two of the plurality of first torsion tabs 6 and the plurality of second torsion tabs 7.

Further, a washer may be added to the fastening nut 9 and the corresponding torsion spring piece group.

In the embodiment shown in fig. 4, each of the plurality of second torsion tabs 7 has a non-circular aperture 70, and at least a portion of the first drive spindle 1 and the second drive spindle 2 is formed as a non-circular portion that cooperates with the non-circular aperture 70 such that the first drive spindle 1 rotates in synchronism with the plurality of second torsion tabs 7 and the second drive spindle 2 rotates in synchronism with the plurality of second torsion tabs 7, i.e. the first drive spindle 1 and the second drive spindle 2 are able to rotate their corresponding plurality of second torsion tabs 7.

The specific form of the mechanism for providing the torque force is not limited as long as the torque force adjustment sheet can adjust the torque force of the first transmission rod shaft and the second transmission rod shaft. The plurality of torsion tabs may also be formed in other forms, for example, the torsion tabs may be formed as torsion tabs having two spindle holes, at least one of which is formed to be open, thereby allowing stress generated between the rotating spindle shaft and the spindle hole to be relieved, such torsion tabs being capable of elastically urging the two spindle shafts in a radial direction.

In addition, the biaxial hinge can also comprise at least one plate-shaped wrapping torsion piece with two ends respectively and elastically and tightly wrapping the first transmission rod shaft and the second transmission rod shaft. However, according to the actual design requirement, the biaxial hinge may include only the plate-shaped cladding torsion member instead of the torsion adjusting plate, the torsion spring plate set and the fastening nut.

That is, in embodiments, the biaxial hinge may include any one or combination of a plurality of torsion tabs, a plate-shaped cladding torsion member, and a torsion spring set and a fastening nut. Specifically, the biaxial hinge may include any one or a combination of a plurality of torsion tabs, a plate-shaped cladding torsion member, and a torsion spring set and a fastening nut according to actual design requirements.

Hereinafter, advantageous effects produced when the biaxial hinge as described above is applied to a portable electronic device will be described.

Furthermore, according to a second aspect of the present invention, there is provided a portable electronic apparatus including the biaxial hinge, the first case, and the second case as described above. As shown in fig. 1 and 3, a first connection plate 100 is fixedly connected to a side of the first drive lever shaft 1 of the biaxial hinge opposite to the fastening nut 9, and a second connection plate 200 is fixedly connected to a side of the second drive lever shaft 2 of the biaxial hinge opposite to the fastening nut 9. Although the first and second housings are not shown in the figures, it will be appreciated that in an embodiment the first housing is coupled to the first drive shaft 1 via a first connecting plate 100 and the second housing is coupled to the second drive shaft 2 via a second connecting plate 200.

In addition, the portable electronic device can be opened and closed in 360 degrees. Specifically, the orientation of the first and second housings includes: the first and second housings are closed facing 0 degrees facing each other, the first and second housings are flat 180 degrees facing each other, and the first and second housings are closed facing 360 degrees facing away from each other. For example, when the first and second housings are in 360 degree back-to-back closure, 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, it is equivalent to the first casing and the second casing of the portable electronic apparatus being staggered by causing the first transmission shaft 1 and the second transmission shaft 2 to be rotated in conjunction in the rotation directions opposite to each other at the angular velocities different from each other by the first intermediate gear 3 and the second intermediate gear 4.

For example, in the case that the portable electronic device is a notebook computer, the first housing may be a keyboard housing, and the second housing may be a display housing, and in a state that the keyboard housing and the display housing of the notebook computer are closed back to back at 360 degrees, an operator may easily operate to rotate the keyboard housing and the display housing according to the fact that the free end of the keyboard housing and the free end of the display are staggered from each other.

For example, in the case that the portable electronic device is a folding mobile phone or a tablet device, the first housing and the second housing may both be display housings, when the first housing and the second housing are in a state of being 180 degrees flat, the first housing and the second housing may together form a larger display screen, and when the first housing and the second housing are in a state of being 360 degrees back-to-back closed, for example, a relatively smaller display screen may be provided for the portable electronic device of the folding mobile phone or the tablet device, and when it is necessary to change such a state, an operator may easily operate to rotate the first housing and the second housing by staggering the free end of the first housing and the free end of the second housing from each other.

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

1. A dual axis hinge, characterized in that it comprises:

2. A biaxial hinge as set forth in claim 1,

the diameter of the third normal surface reference circle of the first intermediate gear is larger than that of the fourth normal surface reference circle of the second intermediate gear, and the diameter of the tooth top circle of the first intermediate gear is larger than that of the second intermediate gear.

3. A biaxial hinge as set forth in claim 1,

the first intermediate gear is fan-shaped and has a first arc-shaped portion meshing with the first gear, and

the second idler gear is sector shaped and has a second arcuate portion that meshes with the second gear.

4. A biaxial hinge as set forth in claim 2,

the first idler gear and the second idler gear each have a semi-circular shape when viewed along the third axis of rotation.

5. A biaxial hinge as set forth in claim 3,

the first drive shaft and the second drive shaft rotate with a relative rotation angle between 0 degrees and 360 degrees, the rotation angle of the first intermediate gear and the second intermediate gear is between 0 degrees and 180 degrees, the relative rotation angle is defined as the sum of the rotation angle of the first drive shaft and the rotation angle of the second drive shaft.

6. The biaxial hinge of claim 1, wherein the diameter of the first normal reference circle is equal to the diameter of the second normal reference circle.

7. The biaxial hinge as recited in claim 6, wherein a diameter of a tip circle of the first gear is equal to a diameter of a tip circle of the second gear, and a module of the first gear is equal to a module of the second gear.

8. The dual axis hinge of claim 1, wherein each of the first gear, the second gear, the first idler gear, and the second idler gear are helical gears.

9. The biaxial hinge according to any one of claims 1 to 8, further comprising:

10. A portable electronic device characterized by comprising a first housing, a second housing, and the biaxial hinge according to any one of claims 1 to 9;