TWI609619B - Two-shaft hinge and terminal apparatus using the same - Google Patents

Description

Biaxial hinge and terminal machine using the same

The present invention relates to a biaxial hinge suitable for use in a terminal machine such as a notebook computer, a mobile computer or a personal digital assistant (PDA), and relates to a terminal machine using the biaxial hinge.

In a terminal machine such as a notebook computer, a mobile computer or a PDA which is constituted by a first casing having a keyboard portion and a second casing having a display portion, the hinge used includes a single-axis hinge and a double-axis hinge. Wherein, the single-axis hinge has only one shaft, which connects the first housing and the second housing, so that the first housing and the second housing can be opened in the up and down direction, and the biaxial hinge has two axes, which are tied After the first housing and the second housing are opened 90 degrees in the up and down direction, the second housing is rotated in a horizontal direction relative to the first housing. The present invention relates to a biaxial hinge and a terminal machine using the same, but unlike the prior art, the biaxial hinge of the present invention can open the first housing and the second housing upward and downward respectively. 180 degrees, a total of 360 degrees can be turned on.

In the prior art, the biaxial hinge having the above-described configuration and the terminal device using the biaxial hinge can be referred to, for example, the contents described in Japanese Patent Laid-Open Publication No. 2009-063039. The biaxial hinge described in Japanese Laid-Open Patent Publication No. 2009-063039 is a link between a shaft assembled to a first member (first housing) and a shaft assembled to a second member (second housing) The arms are connected to each other, and a friction torque generating means is disposed on each of the shafts, and a connecting rod is disposed, but the first element and the second element cannot be opened to 180 degrees or more, and the first casing and the second casing cannot be Regularly carry out the opening movement.

In recent years, users have become more and more diversified in demand for terminal devices such as notebook computers, and the functions of terminal devices have also increased. For example, in order to enable the terminal device to be used as both a notebook computer and a tablet computer, it is necessary to provide a hinge when the first housing and the second housing constituting the terminal device are closed by 0 degrees through the hinge. When the state is opened to 360 degrees, the hinge must be opened to the other housing when one of the housings is opened. The restriction is made and it is necessary to be able to limit the order of the opening operation to one of the first housing or the second housing so that the terminal machine can be opened with a certain rule.

In view of the above problems, an object of the present invention is to provide a biaxial hinge and a terminal machine using the same, which enable a first casing and a second casing of a terminal machine such as a notebook computer to have a specific rule The opening operation is performed in a range of at least 180 degrees, preferably 360 degrees, and can be maintained in a stable stop state at an arbitrary opening angle.

To achieve the above object, a biaxial hinge of the present invention is characterized in that a first hinge rod assembled to a first housing and a second hinge rod assembled to a second housing are passed through a plurality of elements disposed at a specific interval in parallel The states are rotatably coupled to each other, and selective rotation restricting means are provided between the elements, and the selective rotation restricting means alternately rotates the first hinge lever and the second hinge lever. A friction torque generating means is disposed on one side of the selective rotation restricting means for causing the first hinge lever and/or the second hinge lever to generate a friction torque when rotating. A suction means is provided on the other side of the selective rotation restricting means for causing the first hinge lever and/or the second hinge lever to generate a suction function when rotated. An elastic means acts on the friction torque generating means and the attracting means. A stop means stops when the first hinge rod and/or the second hinge rod are rotated 180 degrees in different directions. The selective rotation limiting means comprises a connecting element, a sliding guiding element, a first locking cam element, a second locking cam element and a locking element. The connecting element is disposed corresponding to the sliding guiding element, and the connecting element and the sliding guiding element respectively have a first bearing part, a second bearing part and a connecting part, and the connecting part is used for connecting the first bearing part and the second bearing part, The first hinge rod and the second hinge rod are respectively rotatably disposed through the first bearing portion and the second bearing portions. a first locking cam member and a second locking cam member. The first locking cam member and the second locking cam member respectively have a first cam recess and a second cam recess, and the first cam recess and the second cam recess respectively Formed along the axial direction of the first locking cam member and the second locking cam member to both end portions, the first locking cam member and the second locking cam member are respectively restricted by the first hinge rod and the second hinge rod, and Rotating together with the first hinge rod and the second hinge rod, respectively. The locking element is slidably disposed between the first locking cam element and the second locking cam element, the locking element is provided with a first cam protrusion, a second cam protrusion and two engaging grooves, the first cam protrusion and The second cam protrusions are respectively disposed on Above and below the locking element, the engaging grooves are respectively disposed on two sides of the locking element, and the connecting portion of the connecting element and the sliding guiding element are respectively embedded in the engaging grooves, according to the first locking cam element The first locking cam member faces and fits the first cam convex portion and the second cam convex portion of the locking member at a rotation angle of the second locking cam member to slide the locking member as a whole in the up and down direction. Wherein, the selective rotation limiting means allows one of the first hinge rod and the second hinge rod to rotate when the first housing and the second housing are in a closed state, and the first housing is opposite to the second housing During the opening operation, when one of the first hinge rod and the second hinge rod rotates, the selective rotation restricting means restricts the rotation of the other side, so that the first housing and the second housing are within a total range of 360 degrees. Open the up and down direction.

To achieve the above object, another biaxial hinge of the present invention is characterized in that the first hinge rod assembled to the first housing and the second hinge rod assembled to the second housing pass through a plurality of elements disposed at a specific interval to The parallel states are rotatably coupled to each other, and selective rotation restricting means are provided between the elements, and the selective rotation restricting means alternately rotates the first hinge rod and the second hinge rod. A friction torque generating means is disposed on one side of the selective rotation restricting means for causing the first hinge lever and/or the second hinge lever to generate a friction torque when rotating. A suction means is provided on the other side of the selective rotation restricting means, and a suction means causes the first hinge lever and/or the second hinge lever to generate a suction function when rotated. An elastic means acts on the friction torque generating means and the attracting means. A stop means stops when the first hinge rod and/or the second hinge rod are rotated 180 degrees in different directions. The friction torque generating means is composed of two first friction washers, two second friction washers and a friction plate, and the first friction washers and the second friction washers are respectively disposed on two sides of the friction plate, and are stopped. The method is disposed on the other side of the second friction washer relative to the friction plate, and the selective rotation limiting means includes a connecting component, the connecting component has a corresponding first bearing portion and a second bearing portion, and the second a friction washer and the second friction pads are disposed corresponding to the first bearing portion and the second bearing portion of the connecting component, and the first friction washer and the second friction washers are coupled by the first hinge rod and the second hinge rod The device is configured to limit the rotation and axial sliding of the first hinge rod and the second hinge rod. Wherein, the attraction means comprises a first cam follower, a second cam follower and at least two elastic means, the first cam follower and the second cam follower respectively and the first bearing of the connecting element And the second bearing portion is correspondingly disposed, the elastic means is connected to the first cam follower and the second cam follower, the first cam follower has at least one first curved cam protrusion and the second cam The follower has at least one second curved cam protrusion, The first cam follower and the second cam follower are pierced by the first hinge rod and the second hinge rod to restrict rotation and axial sliding of the first hinge rod and the second hinge rod, and the selective rotation limiting means The connecting element has at least one first curved cam recess and at least one second curved cam recess corresponding to the first curved cam protrusion and the second curved cam protrusion, and the first hinge rod and the second hinge rod pass the elastic means Crimping the first cam follower, the second cam follower and the connecting member, and the first bending lever and the second bending lever are engaged by the first bending cam protrusion or the second bending cam protrusion or The first curved cam recess and the second curved cam recess are disengaged to control the rotation angle and the axial sliding of the first hinge rod and the second hinge rod and to generate a suction function at a specific opening angle. Wherein, the selective rotation limiting means allows one of the first hinge rod and the second hinge rod to rotate when the first housing and the second housing are in a closed state, and the first housing is opposite to the second housing When the opening operation is performed, when one of the first hinge rod and the second hinge rod is rotated, the selective rotation restricting means restricts the rotation of the other side so that the first housing and the second housing are in a total range of 360 degrees. The inside is opened in the up and down direction.

Further, a terminal device of the present invention is characterized in that the biaxial hinge described in any of the above embodiments is used.

According to the above configuration, the present invention provides a biaxial hinge through which the first housing and the second housing are respectively assembled with the first hinge when the first housing and the second housing are in the closed state and the fully opened state. The first housing and the second housing of the rod and the second hinge rod are openable, and when the first housing or the second housing performs one of the opening operations, the first hinge rod or the second The rotation of one of the hinge rods will be limited, and the coupling will restrict the opening operation of the other of the first housing and the second housing. Thereby, the first housing and the second housing can perform a total of 360 degrees of opening operation, and further, when the selective rotation limiting means selectively allows rotation of one of the first hinge rod or the second hinge rod, The rotational torque generated by the rotation of the hinge lever will be controlled by the friction torque generating means, so that the opening operation of the first housing and the second housing can be stopped at any opening angle, and in the first housing and/or When the second housing reaches a specific opening angle, the suction means can automatically close one of the first housing and/or the second housing from the specific opening angle. Moreover, by means of the setting of the stop means, the opening angle of one of the first housing and/or the second housing can be limited to a specific opening angle.

Secondly, another biaxial hinge provided by the present invention is provided through the selective rotation limiting means, so that the first housing and the second housing can only enter the second housing when the second housing is in the closed state. In the opening operation, when the second casing is opened to a certain angle, the first casing can be rotated (opening operation). When the second casing performs the opening operation, the opening operation of the first casing will be restricted.

In addition, the terminal device provided by the present invention can perform a 180-degree opening operation of the first casing and the second casing by the above-described configuration to perform a total opening operation of 360 degrees.

1‧‧‧Note Computer

10‧‧‧First hinge rod

10a, 12a‧‧‧Assembly shaft

10b, 11a, 11b, 12b, 13a, 13b‧‧‧ assembly holes

10c, 12c‧‧‧ engaging recess

10d, 12d‧‧‧Flange

10e, 12e‧‧‧ first deformation axis

10f, 12f‧‧‧ second deformation shaft

10g, 12g‧‧‧assembly pin

10h‧‧‧First external thread

11‧‧‧First assembled board

12‧‧‧Second hinge rod

12h‧‧‧Second external thread

13‧‧‧Second assembled board

14‧‧‧Hinged shell

14a‧‧‧ partition wall

14b, 20e‧‧‧ internal thread

15‧‧‧Selective rotation limit

16‧‧‧ Friction torque generation means

16a‧‧‧First friction torque generation means

16b‧‧‧Second friction torque generation means

17‧‧‧Attraction means

17a‧‧‧First attraction

17b‧‧‧second attraction

18, 6, 7‧‧‧Assembled screws

19‧‧‧stop means

19a‧‧‧first stop means

19b‧‧‧second stop means

2‧‧‧First housing

2a‧‧‧ Keyboard Department

2b, 3b‧‧‧ housing recess

20‧‧‧Connecting components

20a, 22a‧‧‧ first bearing

20b, 22b‧‧‧second bearing

20c, 22c‧‧‧ link

20d‧‧‧protrusion

20f‧‧‧First A Bending Cam Recess

20g‧‧‧First B bending cam recess

20h‧‧‧Second A curved cam recess

20i‧‧‧Second B bending cam recess

20k, 22d, 25a‧‧‧ first bearing hole

20m, 22e, 25b‧‧‧ second bearing hole

21‧‧‧Locking components

21a‧‧‧First cam lobe

21b‧‧‧Second cam projection

21c, 21d‧‧‧ card joint groove

22‧‧‧Sliding guide elements

22f‧‧‧First stop

22g‧‧‧second stop

23, 41‧‧‧ first locking cam element

23a, 24a, 28a, 29a, 30a, 31a, 34a, 35a, 41a, 42a‧‧‧ deformation through hole

23b‧‧‧First cam recess

23c‧‧‧First stop piece

24, 42‧‧‧Second locking cam element

24b‧‧‧second cam recess

24c‧‧‧second stop piece

25‧‧‧ Friction plate

26‧‧‧First A Friction Washer

26a, 27a‧‧‧ deformation snap hole

26b, 27b‧‧‧ card stop

27‧‧‧First B Friction Washer

28‧‧‧Second A Friction Washer

29‧‧‧Second B Friction Washer

3‧‧‧ second housing

3a‧‧‧Display Department

30‧‧‧First cam follower

30b‧‧‧First A curved cam lobe

30c‧‧‧First B curved cam lobe

31‧‧‧Second cam follower

31b‧‧‧Second A curved cam projection

31c‧‧‧Second B bending cam projection

32‧‧‧First elastic means

32a, 33a‧‧ disc spring

32b, 33b‧‧‧through holes

33‧‧‧Second elastic means

34‧‧‧First push washer

35‧‧‧Second push washer

36‧‧‧First lock nut

37‧‧‧Second lock nut

4, 40, 5‧‧‧ biaxial hinges

41b‧‧‧First A cam recess

41c‧‧‧First B cam recess

42b‧‧‧Second A cam recess

42c‧‧‧Second B cam recess

a, b‧‧‧ gap

1 is a schematic view of a terminal machine assembled with a biaxial hinge of the present invention and may be, for example, a notebook computer, wherein (a) is a perspective view when the second housing is opened from the front with respect to the first housing. (b) is a perspective view when the first casing and the second casing are in a closed state as viewed from the rear.

Fig. 2 is an explanatory view showing an assembled state of a biaxial hinge to a terminal device such as a notebook computer according to the present invention.

3 is a perspective view showing the biaxial hinge of the present invention housed in the hinge housing in a state in which the first housing and the second housing of the notebook computer are rotated by 180 degrees in opposite directions.

4 is a perspective view of the biaxial hinge of the present invention taken out of the hinge housing when viewed from a direction different from that of FIG. 3 when the first housing and the second housing are in a closed state.

Fig. 5 is a perspective view showing the state in which the first hinge lever of the biaxial hinge of the present invention is rotated by 180 degrees from the state of Fig. 4.

Fig. 6 is a perspective view showing a state in which the first hinge lever and the second hinge lever of the biaxial hinge of the present invention are rotated 180 degrees in the opposite direction from the state of Fig. 4;

Fig. 7 is an exploded perspective view showing the biaxial hinge of the present invention as viewed from the state shown in Fig. 5.

Figure 8 is a longitudinal cross-sectional view showing the selective rotation restricting means of the biaxial hinge of the present invention in the state shown in Figure 4 .

Figure 9 is a view showing the selective rotation restricting means of the biaxial hinge of the present invention in the state shown in Figure 5 Longitudinal section view.

Figure 10 is a longitudinal cross-sectional view showing the selective rotation restricting means of the biaxial hinge of the present invention in the state shown in Figure 6.

Figure 11 is a schematic view of the hinged shell of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a cross-sectional view taken along line A-A of (a).

Figure 12 is a schematic view of the coupling element of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 13 is a schematic view of a sliding guide member of a biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 14 is a schematic view of the locking element of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 15 is a schematic view of the first locking member on the upper side of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 16 is a schematic view of the second locking member on the lower side of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 17 is a perspective view of the friction plate of the biaxial hinge of the present invention.

Figure 18 is a schematic view of the first cam follower on the upper side of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 19 is a schematic view of the second cam follower on the lower side of the biaxial hinge of the present invention, wherein (a) is a side view and (b) is a perspective view.

Figure 20 is a longitudinal cross-sectional view showing the operation of the selective rotation restricting means of another embodiment of the biaxial hinge of the present invention.

Figure 21 is a longitudinal cross-sectional view showing the operation of the selective rotation restricting means of the biaxial hinge shown in Figure 20.

Figure 22 is a longitudinal cross-sectional view showing the operation of the selective rotation restricting means of the biaxial hinge shown in Figure 20.

Hereinafter, an embodiment of a notebook computer in which a biaxial hinge of the present invention is used in one example of a terminal device will be described with reference to the related drawings. It should be particularly noted that the present invention is not limited to the use of a biaxial hinge on a notebook computer, and can also be used on a terminal computer or other machine such as a mobile computer or a PDA, and the machine has a hinge attached by a double shaft. The first housing and the second housing may be mutually opened by 180 degrees or more in the up and down direction.

Embodiment 1: (a) and (b) of Fig. 1 are schematic views of a notebook computer 1 using a biaxial hinge of the present invention, and the notebook computer 1 is an example of a portable terminal machine. The notebook computer 1 includes a first casing 2 provided with a keyboard portion 2a and a second casing 3 provided with a display portion 3a. The pair of biaxial hinges 4 and 5 of the present invention respectively connect the first casing 2 with The left and right ends of the second casing 3 are rearward, so that the first casing 2 and the second casing 3 can be opened.

Since the configurations of the biaxial hinges 4 and 5 are the same, only the configuration of one of the biaxial hinges 4 will be described below, and the description of the other biaxial hinge 5 will be omitted. Of course, in other embodiments, the biaxial hinge 5 can also adopt other different configurations as long as it does not affect the operation.

2 to 19 are schematic views of a biaxial hinge 4 according to an embodiment of the present invention. As shown, the symbol labeled 10 is the first hinge rod. Specifically, as shown in FIG. 7, the first hinge lever 10 has an assembly shaft portion 10a, a flange portion 10d, a first deformation shaft portion 10e, and a second deformation shaft portion 10f. The assembled shaft portion 10a has a substantially flat cross section at one end thereof, and has assembled holes 10b and 10b on the surface thereof, the flange portion 10d is provided to be connected to the shaft portion 10a, and the outer periphery of the flange portion 10d has the engaging recess portion 10c. The first deforming shaft portion 10e is provided adjacent to the flange portion 10d, and the first deforming shaft portion 10e has a substantially elliptical cross section, and the second deforming shaft portion 10f is connected to the first deforming shaft portion 10e. The second deforming shaft is provided. The outer diameter of the portion 10f is smaller than the first deformation shaft portion 10e, and the cross section of the second deformation shaft portion 10f is also approximately elliptical.

The first assembly plate 11 is assembled to the assembly shaft portion 10a, and the first assembly plate 11 is assembled through the assembly holes 10b, 10b of the first hinge rod 10 through the assembly pins 10g, 10g having the flange portions, respectively. The assembly holes 11a and 11a of the plate 11 are brought into close contact with one of the assembly pins 10g and 10g to be assembled to the assembly shaft portion 10a. Moreover, as shown in particular in FIG. 2, the first assembled board 11 is transparent. The assembly screws 11 and 6 are assembled to the second casing 3 through the assembly holes 11b, 11b... provided in the first assembly plate 11.

Next, the element designated as 12 is a second hinge rod, and the second hinge rod 12 is disposed in parallel in the up and down direction of the first hinge rod 10. Specifically, as shown in FIG. 7, the second hinge lever 12 has an assembly shaft portion 12a, a flange portion 12d, a first deformation shaft portion 12e, and a second deformation shaft portion 12f. The assembled shaft portion 12a has a substantially flat cross section at one end thereof, and the assembly holes 12b and 12b are provided on the surface thereof, and the flange portion 12d is provided to be connected to the shaft portion 12a, and the outer periphery of the flange portion 12d has the engaging recess portion 12c. The first deforming shaft portion 12e is provided adjacent to the flange portion 12d, and the first deforming shaft portion 12e has a substantially elliptical cross section, and the second deforming shaft portion 12f is connected to the first deforming shaft portion 12e. The second deforming shaft is provided. The outer diameter of the portion 12f is smaller than the first deformation shaft portion 12e, and the cross section of the second deformation shaft portion 12f is also approximately elliptical.

The second assembly plate 13 is assembled to the assembly shaft portion 12a, and the second assembly plate 13 is assembled through the assembly holes 12b, 12b of the second hinge rod 12 through the assembly pins 12g, 12g having the flange portions, respectively. The assembly holes 13a and 13a of the plate 13 are assembled to the assembly shaft portion 12a by adhering one end of each of the assembly pins 12g and 12g. Further, as shown in FIG. 2 in particular, the second assembly plate 13 is assembled to the first casing 2 through the assembly holes 13b, 13b, which are provided by the assembly screws 7, 7, ... through the second assembly plate 13. At the same time, the first assembly board 11 and the second assembly board 13 are assembled to the first housing 2 and the second housing 3, whereby the first hinge rod 10 and the second hinge rod 12 are relatively perpendicular to the axial direction and parallel to each other. .

Further, the symbol designated 14 is a hinge housing for accommodating the portions of the first hinge lever 10 and the flange portions 10d and 12d of the second hinge lever 12, and the assembly shaft portions 10a and 12a are exposed. outer.

As shown in particular in FIGS. 3 and 11, the hinge housing 14 is cylindrical and has a long hole in cross section, and the interior of the hinge housing 14 accommodates selective rotation restrictions assembled on the first hinge rod 10 and the second hinge rod 12. The means 15, the friction torque generating means 16, the suction means 17, and the stopping means 19. Specifically, as shown in FIG. 11, the hinge housing 14 is provided with a partition wall 14a, and the partition wall 14a is provided with an internal thread portion 14b, and particularly as shown in FIG. 7, the center of the coupling member 20 of the selective rotation restricting means 15. The portion is fixed to the partition wall 14a provided with the female screw portion 14b by the assembly screw 18. Further, as shown in particular in Fig. 2, the hinge housing 14 is housed in the housing recesses 2b and 3b provided in the first housing 2 and the second housing 3.

Next, the configuration of the selective rotation restricting means 15 will be described. The selective rotation restricting means 15 is composed of a coupling member 20, a locking member 21, a slide guiding member 22, a pair of first locking cam members 23 and a second locking cam member 24. The side surface of the connecting element 20 is approximately in the shape of a gourd, and has a first bearing portion 20a, a second bearing portion 20b, and a connecting portion 20c. The upper and lower portions of the first bearing portion 20a and the second bearing portion 20b are approximately disk-shaped and connected. The portion 20c is for connecting the first bearing portion 20a and the second bearing portion 20b. The first bearing portion 20a and the second bearing portion 20b are respectively provided with a first bearing hole 20k and a second bearing hole 20m having a circular cross section, a second deforming shaft portion 10f of the first hinge rod 10 and a second hinge rod The second deforming shaft portion 12f of the 12 is inserted through the first bearing hole 20k and the second bearing hole 20m, respectively, and is rotatably received by the first bearing hole 20k and the second bearing hole 20m. The connecting portion 20c is provided with a protruding portion 20d, and the protruding portion 20d is provided with the female screw portion 20e and is assembled to the partition wall 14a of the hinge housing 14 through the assembling screw 18. Further, the coupling portion 20c is fitted into the engagement groove portion 21c of the lock member 21 to allow the lock member 21 to slide in the up and down direction, wherein the first cam portion 21a and the second cam portion 21b are provided above and below the lock member 21, respectively. .

Like the connecting member 20, the sliding guiding member 22 has a gourd shape and has a first bearing portion 22a, a second bearing portion 22b, and a coupling portion 22c. The upper and lower portions of the first bearing portion 22a and the second bearing portion 22b are approximately rounded. The disk-shaped connecting portion 22c is for connecting the first bearing portion 22a and the second bearing portion 22b. The first bearing portion 22a and the second bearing portion 22b are respectively provided with a first bearing hole 22d and a second bearing hole 22e, and the first deformation shaft portion 10e of the first hinge rod 10 and the first deformation of the second hinge rod 12 The shaft portion 12e is inserted through the first bearing hole 22d and the second bearing hole 22e, respectively, and is rotatably received by the first bearing hole 22d and the second bearing hole 22e. The coupling portion 22c is fitted into the other engagement groove portion 21d of the lock member 21 to allow the lock member 21 to slide in the up and down direction. The first bearing portion 22a and the second bearing portion 22b are provided with a first stopper portion 22f and a second stopper portion 22g, and the first stopper portion 22f and the second stopper portion 22g are cut through the first bearing hole 22d and The circumference of the second bearing hole 22e is formed.

Further, the lock cam member is configured as a pair of upper and lower sides, and the first lock cam member 23 located on the upper side and the second lock cam member 24 located on the lower side are respectively provided with the deformation through holes 23a, 24a, and the first of the first hinge lever 10 The deformed shaft portion 10e and the first deformed shaft portion 12e of the second hinge rod 12 are inserted into the through-transformed through-holes 23a and 24a, respectively, whereby the first lock cam member 23 and the second lock cam member 24 are respectively assembled to the first hinge rod 10 and the second hinge rod 12, The first hinge lever 10 and the second hinge lever 12 are caused to restrict the rotation of the first locking cam member 23 and the second locking cam member 24. The first locking cam member 23 and the outer periphery of the second locking cam member 24 are respectively provided with a first cam recess 23b and a second cam recess 24b, and the first cam recess 23b and the second cam recess 24b are respectively along the first locking cam member 23 and the second locking cam member 24 are formed to extend in the axial direction to both end portions. Further, at the time of assembly, the first locking cam member 23 and the second locking cam member 24 are adjacent to the side of the sliding guiding member 22, respectively. A first stopper piece 23c and a second stopper piece 24c are provided. The first stopper piece 23c and the second stopper piece 24c abut against the first sliding guide element 22 according to the rotation angle of the sliding guide element 22. The stopper portion 22f and the second stopper portion 22g. Further, the first locking cam member 23 and the second locking cam member 24 are interposed between the coupling member 20 and the sliding guiding member 22, while the locking member 21 is sandwiched under the first locking cam member 23 and Above the second locking cam member 24, the first cam recess 23b of the first locking cam member 23 and the second cam recess 24b of the second locking cam member 24 pass through the first locking cam member 23 and the second locking cam member 24. The first cam convex portion 21a and the second cam convex portion 21b of the locking member 21 face and are fitted to the rotational angle.

Next, the configuration of the friction torque generating means 16 will be described. The friction torque generating means 16 is composed of a first friction torque generating means 16a on the first hinge rod 10 side and a second friction torque generating means 16b on the second hinge rod 12 side, and the two portions are simultaneously explained. . The friction torque generating means 16 is composed of a friction plate 25, a first A friction washer 26 and a first B friction washer 27, a second A friction washer 28 and a second B friction washer 29, and a first elastic means 32, second elasticity, which will be described later. The means 33 constitutes. The upper and lower portions of the friction plate 25 have a first bearing hole 25a and a second bearing hole 25b, respectively, and the friction plate 25 is disposed between the sliding guiding member 22 and the flange portions 10d, 12d, and the first hinge rod 10 A deforming shaft portion 10e and a first deforming shaft portion 12e of the second hinge rod 12 are rotatably inserted through the first bearing hole 25a and the second bearing hole 25b, respectively. The first A friction washer 26 and the first B friction washer 27 are positioned between the flange portions 10d, 12d and the friction plate 25, and the first A friction washer 26 and the first B friction washer 27 have a locking piece 26b at the periphery thereof. 27b, the locking pieces 26b and 27b are engaged with the engaging recesses 10c and 12c provided in the flange portions 10d and 12d, and the first A friction washer 26 and the first B friction washer 27 are respectively axially aligned in the axial direction. The deformation engagement holes 26a and 27a are provided, and the first deformation shaft portion 10e of the first hinge rod 10 and the first deformation shaft portion 12e of the second hinge rod 12 are rotatably inserted and engaged with the deformation engagement hole 26a, respectively. 27a. The second A friction washer 28 is tied to the second B friction washer 29 Between the friction plate 25 and the sliding guide member 22, the second A friction washer 28 and the second B friction washer 29 are respectively provided with deformation through holes 28a, 29a in the axial direction of the center portion, and the first deformation of the first hinge rod 10 The shaft portion 10e and the first deformation shaft portion 12e of the second hinge rod 12 are inserted through and engaged with the deformation through holes 28a and 29a, respectively. The first elastic means 32 and the second elastic means 33 crimp the first A friction washer 26, the first B friction washer 27, the second A friction washer 28 and the second B friction washer 29 to the friction plate through the sliding guiding member 22. 25.

Next, the suction means 17 is constituted by a first suction means 17a on the side of the first hinge rod 10 on the upper side and a second suction means 17b on the side of the second hinge rod 12 on the lower side, where both parts are simultaneously To explain. The attraction means 17 are the first cam follower 30 and the second cam follower 31, the first elastic means 32 and the second elastic means 33, the first pressing washer 34 and the second pressing washer 35, the first lock The fixed nut 36 and the second locking nut 37 are formed. Deformed through holes 30a, 31a are respectively provided in the axial direction of the central portion of the first cam follower 30 and the second cam follower 31, and the second deformed shaft portion 10f of the first hinge rod 10 and the second hinge rod 12 are The second deforming shaft portion 12f is inserted and inserted into the deformation through holes 30a and 31a, respectively. At the same time, the outer side and the inner side of the side surface of the first cam follower 30 are respectively provided with a first A curved cam convex portion 30b and a first B curved cam convex portion 30c of different sizes, and the second cam follower 31 is laterally A second A curved cam convex portion 31b and a second B curved cam convex portion 31c having different sizes are provided on the outer side and the inner side, respectively, and the outer side and the inner side of the side surface of the first bearing portion 20a of the connecting member 20 are respectively provided with different sizes. An A curved cam recess 20f and a first B curved cam recess 20g, and a second A curved cam recess 20h and a second B curved cam of different sizes of the connecting member 20 and the outer side and the inner side of the second bearing portion 20b. The concave portion 20i, the first A curved cam convex portion 30b, the first B curved cam convex portion 30c, the second A curved cam convex portion 31b, and the second B curved cam convex portion 31c are respectively associated with the first A curved cam concave portion 20f, A B bending cam recess 20g, a second A bending cam recess 20h, and a second B bending cam recess 20i are opposed to each other. The first elastic means 32 and the second elastic means 33 are connected to the first cam follower 30 and the second cam follower 31, and the first elastic means 32 and the second elastic means 33 are respectively formed by a plurality of discs. The springs 32a, 32a, ..., 33a, 33a, ... are formed, and the second deforming shaft portion 10f of the first hinge rod 10 and the second deforming shaft portion 12f of the second hinge rod 12 are respectively inserted through the respective disc springs. 32a is a through hole 32b provided in the axial direction of the center portion and a through hole 33b provided in the axial direction of the center portion of each of the disk springs 33a. The first pressing washer 34 and the second pressing washer 35 are connected to the first elastic means 32 and the second elastic means 33, The second deforming shaft portion 10f of the first hinge rod 10 and the second deforming shaft portion 12f of the second hinge rod 12 are respectively inserted and engaged with the deformation through hole 34a provided in the axial direction of the center portion of the first pressing washer 34. The second pressing washer 35 has a deformation through hole 35a provided in the axial direction of the center portion. The first locking nut 36 and the second locking nut 37 are respectively screwed to the first external thread portion 10h and the second external thread portion 12h, and the first external thread portion 10h and the first external thread portion 12h are respectively disposed at the first The hinge rod 10 has a free end of the second deforming shaft portion 10f and a free end of the second hinge shaft 12 and its second deforming shaft portion 12f.

Further, the stopper means 19 is constituted by the first stopper means 19a on the first hinge rod 10 side and the second stopper means 19b on the second hinge rod 12 side, and the two portions will be described simultaneously. The stopper means 19 is composed of a first stopper piece 23c, a second stopper piece 24c, a first stopper portion 22f, and a second stopper portion 22g. The first stopper piece 23c and the second stopper piece 24c are respectively Provided in the first locking cam member 23 and the second locking cam member 24, the first stopping portion 22f and the second stopping portion 22g are respectively disposed at the first bearing portion 22a and the second bearing portion 22b of the sliding guiding member 22, The stopper means 19 is a position at which the position of the first casing 2 and the second casing 3 in the closed state and the fully open state (each opened 180 degrees) are restricted by the above configuration. Further, in the present embodiment, the friction torque generating means 16, the attracting means 17, and the stopping means 19 are provided on the first hinge rod 10 and the second hinge rod 12, respectively, but in consideration of cost saving or other factors. Next, the friction torque generating means 16, the suction means 17 and the stopping means 19 may be provided only on one of the first hinge rod or the second hinge rod.

Next, the operation of the biaxial hinge 4 of the present invention will be described. First, in a state where the first casing 2 and the second casing 3 shown in FIG. 1(b) are closed, as shown in FIGS. 4 and 8, the first assembled board 11 and the second assembled board 13 are oriented. In the same direction, and as shown in FIG. 8, the first cam recess 23b of the first locking cam member 23 is located on the upper side and its periphery abuts against the first cam projection 21a of the locking member 21, and the second of the second locking cam member 24. The cam recess 24b is fitted into the second cam lobe 21b of the locking member 21, so that in the closed state of the first housing 2 and the second housing 3, the first hinge lever 10 is rotatable, and the second The hinge rod 12 is not rotatable. Thereby, when the first casing 2 and the second casing 3 are in the closed state, only the second casing 3 can be opened relative to the first casing 2 through the selective rotation restricting means 15.

Here, when the second housing 3 is opened relative to the first housing 2, the first hinge lever 10 will rotate, and the first cam protrusion 21a on the upper side of the locking member 21 abuts against the first locking cam member 23. The second housing 3 is opened by the periphery, so that when the second housing 3 is opened In operation, the selective rotation restricting means 15 will prevent the first housing 2 from rotating together with the second hinge lever 12. Next, when the second housing 3 continues to be opened relative to the first housing 2, first, the first attraction means 17a, the first A-curved cam projection 30b of the first cam follower 30 and the first B-curved cam projection 30c will be resisted by the first A curved cam recess 20f and the first B curved cam recess 20g of the connecting member 20, but the first A curved cam convex portion 30b and the first B curved cam convex portion 30c are separated from the first An A bending cam recess 20f and a first B bending cam recess 20g, when the second housing 3 is opened relative to the first housing 2, the first A friction washer 26 and the friction plate 25 at the upper portion of the first friction torque generating means 16a Between the second A-friction washer 28 and the friction plate 25, which is also located at the upper portion, a frictional torque is generated, so that the second housing 3 can be opened at any position relative to the first housing 2, that is, the first The two housings 3 remain stopped relative to the first housing 2 at any opening angle. Further, although the friction torque at this time is generated by the first suction means 17a of the suction means 17, the frictional torque is only used for assistance, and the main frictional torque is still the first frictional torque generation means 16a of the frictional torque generation means 16. Produced.

In this way, as shown in FIG. 8 to FIG. 9 , when the second housing 3 continues to open the operation at any position with respect to the first housing 2 and is opened to 180 degrees, as shown in FIG. 5 , FIG. 7 and FIG. 9 . As shown in FIG. 13, FIG. 15, and FIG. 16, the first stopper piece 23c (see FIG. 15) of the first locking cam member 23 of the first locking means 19a abuts against the first of the sliding guiding member 22. The stopper portion 22f (see FIG. 13) restricts the rotation of the first hinge lever 10, and therefore, the second housing 3 is stopped after being opened to 180 degrees with respect to the first housing 2. At this time, as shown in FIG. 9, the first cam recess 23b of the first locking cam member 23 is simultaneously rotated by 180 degrees to the position of the first cam portion 21a of the locking member 21 due to the gap therebetween. a, therefore, the rotation (opening) of the first casing 2 can be allowed.

Further, when the second casing 3 is closed from the 180-degree open position with respect to the first casing 2, there is no problem. In detail, when the second housing 3 is rotated in the closing direction with respect to the first housing 2, the first cam recess 23b of the first locking cam member 23 and the locking member 21 are rotated together with the first hinge lever 10. Since the gap a is still present between the cam projections 21a, the second housing 3 can be closed relative to the first housing 2. When the second housing 3 is actually rotated in the closing direction with respect to the first housing 2, since the periphery of the first locking cam member 23 abuts against the first cam convex portion 21a, the second cam convex portion 21b of the locking member 21 Keeping the second cam recess 24b fixed to the second locking cam member 24 of the second hinge lever 12 in a fitted state even if When the second casing 3 performs the closing operation, the rotation of the first casing 2 can still be restricted.

Through the above configuration, the second casing 3 can be arbitrarily opened between 0 degrees and 180 degrees with respect to the first casing 2, and the rotation system of the first casing 2 is continuously restricted by the selective rotation restriction means 15. .

Next, when a closed state as shown in FIG. 1(b) is present between the first casing 2 and the second casing 3, as described above, the periphery of the first locking cam member 23 abuts against the locking member 21. The first cam protrusion 21a cannot perform the opening operation, but after the second housing 3 is opened to 180 degrees, the first housing 2 will be able to open the second housing 3 to the opposite direction. Turn 180 degrees. In other words, when the second housing 3 is rotated by 180 degrees, as shown in FIG. 9, the first cam recess 23b of the first locking cam member 23 will be rotated by 180 degrees to face the first cam projection 21a of the locking member 21. And creating a gap a between the two, allowing the second locking cam member 24 assembled in the second hinge lever 12 and restricting its rotation to become rotatable, and when the first housing 2 is rotated, the second locking cam member The outer periphery of the abutting portion 24 abuts against the second cam convex portion 21b of the locking member 21, so that the second casing 3 cannot perform the closing operation.

At this time, if the first housing 2 is rotated relative to the second housing 3 in the opposite operating direction from the second housing 3, the second hinge lever 12 will follow the second cam projection on the lower side of the locking member 21. The portion 21b will abut against the periphery of the second locking cam member 24 to open the first housing 2, so that when the first housing 2 performs the opening operation, the selective rotation restricting means 15 will cause the second housing 3 It is not possible to turn in the direction of closing. When the first housing 2 continues to rotate relative to the second housing 3, first the second attraction means 17b, the second A-curved cam projection 31b and the second B-curved cam projection 31c of the second cam follower 31 will be subjected to Resistance generated when the second A bending cam recess 20h and the second B bending cam recess 20i of the coupling member 20 are disengaged, but the second A bending cam projection 31b and the second B bending cam of the second cam follower 31 When the convex portion 31c is separated from the second A curved cam recess 20h and the second B curved cam recess 20i, when the first housing 2 is rotated relative to the second housing 3, the second B friction washer 29 at the lower portion of the second friction torque generating means 16b A frictional torque will be generated between the friction plate 25 and the first B friction washer 27 and the friction plate 25, and the first housing 2 can be stopped at any position relative to the second housing 3. That is, the first casing 2 can be kept stopped relative to the second casing 3 at an arbitrary rotation (opening) angle. Further, although the friction torque at this time is generated by the second suction means 17b of the suction means 17, the friction torque is only used for assistance, and the main frictional torque is still the second friction by the friction torque generating means 16. The wiping torque generating means 16b is generated.

As shown in FIG. 9 to FIG. 10, when the first housing 2 is rotated at an arbitrary position relative to the opening direction of the second housing 3 opposite to the second housing 3, and rotated 180 degrees, As can be seen from FIGS. 7, 13, and 16, the second stopper piece 24c (see FIG. 16) constituting the second locking cam member 24 of the second stopper means 19b abuts against the sliding guide member 22. The second stopper 22g (see FIG. 13) restricts the rotation of the second hinge lever 12, and therefore, the first housing 2 is stopped after being opened to 180 degrees with respect to the second housing 3. At this time, as shown in FIG. 10, the first casing 2 and the second casing 3 are just in a state of being overlapped with each other.

Further, when the first casing 2 is to be returned from the open position of 180 degrees to the original position with respect to the second casing 3, there is no problem. In detail, when the first housing 2 is rotated in the closing direction relative to the second housing 3 from the state shown in FIG. 10, the periphery of the second locking cam member 24 that rotates together with the second hinge lever 12 will abut. In the second cam convex portion 21b of the locking member 21, the first cam convex portion 21a of the locking member 21 is kept in a fitted state with the first cam concave portion 23b fixed to the first locking cam member 23 of the first hinge lever 10, thus The first housing 2 is rotatable to its original position. At this time, since the first cam recess 23b of the first locking cam member 23 fixed to the first hinge lever 10 is still in the fitted state with the first cam convex portion 21a of the locking member 21, the opening of the second housing 3 is performed. The operation will continue to be limited.

Through the above configuration, the first housing 2 can be arbitrarily rotated between 0 degrees and 180 degrees with respect to the second housing 3 in a state in which the second housing 3 is opened by 180 degrees, at which time the second housing 3 is The opening operation is continuously limited by the selective rotation restriction means 15. As can be understood from the above description, the second housing 3 and the first housing 2 are selectively opened by the selective rotation restricting means 15 when one of the second housing 3 and the first housing 2 is opened. When the operation is performed, the opening operation of the other party will be restricted.

Embodiment 2: According to the above description, the invention of Embodiment 1 is characterized in that only the second casing 3 can be opposed to the first casing in a closed state in which the first casing 2 and the second casing 3 overlap each other. The body 2 is opened. When the second housing 3 is opened relative to the first housing 2, the first housing 2 cannot be opened (or rotated) relative to the second housing 3 during this opening operation. In addition, after the second housing 3 is opened to 180 degrees with respect to the first housing 2, the first housing 2 can be opened (or rotated) relative to the second housing 3, and the second housing 3 is opened there. During the operation, the first housing 2 cannot be opened.

With respect to the first embodiment, the biaxial hinge of the embodiment 2 shown in FIG. 20 to FIG. 22 can enable the first housing 2 or the closed state in which the first housing 2 and the second housing 3 overlap each other. One of the second casings 3 performs an opening operation, and when one of the casings is opened relative to the other casing, the other casing cannot be opened. Further, when both the first housing 2 and the second housing 3 reach a specific opening angle (or rotation angle), either the first housing 2 or the second housing 3 can perform the opening operation. Once one of the housings is opened, the other housing will not be able to open.

In other words, as shown in FIGS. 20 to 22, the biaxial hinge 40 of Embodiment 2 is provided with a first A cam at intervals of 180 degrees at the periphery of the first locking cam member 41 and the second locking cam member 42, respectively. The recess 41b, the first B cam recess 41c and the second A cam recess 42b, the second B cam recess 42c, the second deforming shaft portion 10f of the first hinge rod 10 and the second deforming shaft portion 12f of the second hinge rod 12, respectively The deformed through hole 41a that penetrates and is engaged with the first lock cam element 41 and the deformed through hole 42a of the second lock cam element 42 are inserted. Further, the same component symbols denote the same components as those of the first embodiment.

Thereby, when the first housing and the second housing (not shown) are in the closed state together, as shown in FIG. 20, due to the first cam convex portion 21a and the second cam convex portion 21b of the locking member 21 A gap b is generated by facing the first B cam recess 41c of the first locking cam member 41 and the second A cam recess 42b of the second locking cam member 42, respectively, so that both the first hinge lever 10 and the second hinge lever 12 can be Rotation, therefore, either the first housing 2 or the second housing 3 can perform the opening operation.

However, when either one of the first housing 2 or the second housing 3 performs the opening operation, the first locking cam member 41 or the second locking cam member 42 also follows the first hinge lever 10 of the rotating housing or The second hinge lever 12 rotates together to rotate, and the first cam convex portion 21a or the second cam convex portion 21b of the locking member 21 contacts the first locking cam member 41 or the second locking cam member 42 through the aforementioned rotating motion. The periphery of one of the parties, which in turn limits the rotation of the other.

21 is a schematic view showing a state in which the second casing 3 is opened to 180 degrees with respect to the first casing 2. In this state, the second housing 3 can be rotated in the closing direction to return to the original position, and at the same time, in the state in which the second housing 3 is opened to 180 degrees with respect to the first housing 2, the first housing 2 It is also rotatable in the opposite direction with respect to the second housing 3. Of course, in this state, when When either one of the first housing 2 or the second housing 3 is rotated, the other rotation will be restricted.

Next, as shown in FIG. 22, in a state where the first casing 2 and the second casing 3 are both opened by 180 degrees, since the first cam convex portion 21a and the second cam convex portion 21b of the locking member 21 are respectively faced The first B cam recess 41c of the first locking cam member 41 and the second B cam recess 42c of the second locking cam member 42 enable both the first hinge lever 10 and the second hinge lever 12 to be rotated, and thus, the first housing 2 or either of the second casings 3 can perform the opening operation. On the other hand, when either the first housing 2 or the second housing 3 is performing the opening operation, as described above, the periphery of the first locking cam member 41 and the second locking cam member 42 will abut against the locking. The element 21 has one of its first cam lobe 21a and second cam lobe 21b, and thus can restrict the opening operation of the other housing.

With the configuration of the above embodiment, the opening operation of the first casing 2 and the second casing 3 can also produce a specific law, and the object of the present invention is achieved. Moreover, the above content is merely an example and is not intended to limit the present invention. In other embodiments, the first cam recess 23b and the second cam recess 24b may also be disposed on the first locking cam member 23 and the second locking cam member 24. Any position on the periphery.

As can be seen from the above description, the biaxial hinges 4, 40 of the present invention can alternately rotate the first housing 2 and the second housing 3 by 180 degrees through the first hinge rod 10 and the second hinge rod 12, respectively, for a total of 360 degrees. The opening operation, in which the size of the opening angle is not limited to this.

Secondly, the biaxial hinge of the present invention can not only enable the notebook computer to be used in its original use, but also bend the first housing in the same direction relative to the second housing to make the first housing and the second housing The body is approximately L-shaped, mountain-shaped, or overlapped to form a flat shape, whereby the notebook computer can be in various forms such as a tablet computer in the case where the second housing faces the operator. For the operator to use.

Further, in addition to the above description, the present invention can also apply, for example, the first and second elastic means 32, 33 to the two mechanisms of the friction torque generating means 16 and the suction means 17, to improve the overall efficiency, and at the same time, The locking element and the locking cam element can be designed to have the same outer shape as the first and second elastic means, so as to facilitate changing the cam shape of the attraction means to an arbitrary shape, simplifying the design of the cam characteristic, thereby enabling the second housing 3 No sloshing occurs at a specific opening angle with respect to the first housing 2, or the second housing 3 may be at a specific opening angle The degree of attraction is generated.

Further, in other embodiments, the first A curved cam recess 20f, the first B curved cam recess 20g, the second A curved cam recess 20h, and the second B curved cam recess 20i provided in the coupling member 20 are also disposed in The first A-curved cam projection 30b of the first cam follower 30 or the second cam follower 31, the first B-curved cam projection 30c, the second A-curved cam projection 31b, and the second B-curved cam projection Instead of the cam protrusion or the cam recess which is radially provided from the axial center portion of the coupling member 20, the first cam follower 30, and the second cam follower 31, the 31c can be replaced. Further, the first elastic means 32 and the second elastic means 33 composed of the disc spring may be replaced by a synthetic resin product such as a spring washer, a compression coil spring or an elastic rubber, and the first lock nut 36 and the second The locking nut 37 can also be replaced by a close end of the first hinge rod 10 and the second hinge rod 12. Further, by changing the installation positions of the first cam recess and the second cam recess, it is also possible to advance the opening order of the first housing to the second housing. In addition, although the hinge housing 14 is not provided, the operation of the biaxial hinges 4, 5, 40 is not hindered, but in the case where the hinge housing 14 is provided, when the biaxial hinge is assembled to the terminal machine, the selective rotation restriction means Mechanisms such as friction torque generating means and attraction means will not be exposed, and therefore have the advantage of beautifying the appearance.

With the above configuration, the biaxial hinge of the present invention is suitable for use in a terminal machine such as a notebook computer, such that the first housing and the second housing are relatively open at 180 degrees or more, and are particularly suitable for use as a tablet at the same time. On the laptop.

4‧‧‧Biaxial hinge

10‧‧‧First hinge rod

10a‧‧‧Assembly shaft

10d, 12d‧‧‧Flange

10g‧‧‧assembly pin

10h‧‧‧First external thread

11‧‧‧First assembled board

11b‧‧‧Assembled holes

12‧‧‧Second hinge rod

12h‧‧‧Second external thread

13‧‧‧Second assembled board

15‧‧‧Selective rotation limit

16‧‧‧ Friction torque generation means

16a‧‧‧First friction torque generation means

16b‧‧‧Second friction torque generation means

17‧‧‧Attraction means

17a‧‧‧First attraction

17b‧‧‧second attraction

19‧‧‧stop means

19a‧‧‧first stop means

19b‧‧‧second stop means

20‧‧‧Connecting components

21‧‧‧Locking components

23‧‧‧First locking cam element

24‧‧‧Second locking cam element

25‧‧‧ Friction plate

26‧‧‧First A Friction Washer

30‧‧‧First cam follower

31‧‧‧Second cam follower

32‧‧‧First elastic means

33‧‧‧Second elastic means

34‧‧‧First push washer

35‧‧‧Second push washer

36‧‧‧First lock nut

37‧‧‧Second lock nut

Claims (3)

A biaxial hinge, characterized in that: a first hinge rod assembled to the first housing and a second hinge rod assembled to the second housing are rotatably coupled to each other in a parallel state through a plurality of elements disposed at a specific interval, A selective rotation limiting means is disposed between the components, the selective rotation limiting means alternately rotating the first hinge bar and the second hinge bar; a friction torque generating means is disposed on the selective rotation limiting means a side, the friction torque generating means causes the first hinge bar and/or the second hinge bar to generate a friction torque when rotating; a suction means is disposed on the other side of the selective rotation limiting means, the attraction means Making the first hinge rod and/or the second hinge rod generate a suction function when rotating; an elastic means acting on the friction torque generating means and the attraction means; and a stopping means for the first hinge rod and / or the second hinge rod is stopped when rotating 180 degrees in different directions; wherein the selective rotation limiting means comprises: a connecting element and a sliding guiding element, the connection The component is disposed corresponding to the sliding guiding component, and the connecting component and the sliding guiding component respectively have a first bearing portion, a second bearing portion and a connecting portion, the connecting portion is configured to connect the first bearing portion and the connecting portion a second bearing portion, and the first hinge rod and the second hinge rod are rotatably respectively disposed on the first bearing portion and the second bearing portions; a first locking cam member and a second locking cam An first cam recess and a second cam recess are respectively disposed on the outer periphery of the first locking cam component and the second locking cam component, and the first cam recess and the second cam recess are respectively along the first lock The axial direction of the cam member and the second locking cam member extends to both ends The first locking cam member and the second locking cam member are respectively restricted by the first hinge bar and the second hinge bar, and rotate together with the first hinge bar and the second hinge bar, respectively; a locking member slidably disposed between the first locking cam member and the second locking cam member. The locking member is provided with a first cam protrusion, a second cam protrusion and a second engagement groove. a cam protrusion and a second cam protrusion are respectively disposed above and below the locking element, and the engaging grooves are respectively disposed at two sides of the locking element, the connecting part of the connecting element and the sliding guiding element The connecting portions are respectively embedded in the engaging groove portions, and the first cam convex portion facing the locking member and the first cam cam according to a rotation angle of the first locking cam member and the second locking cam member a second cam protrusion that slides the locking element as a whole in an up and down direction; wherein the selective rotation limiting means allows the first hinge rod when the first housing and the second housing are in a closed state One of the second hinge rods rotates, and when the first housing and the second housing are opposite to each other, when the first hinge rod and the second hinge rod rotate, the selectivity The rotation restricting means restricts the rotation of the other one, so that the first casing and the second casing are opened in the up-and-down direction within a total range of 360 degrees. A biaxial hinge, characterized in that: a first hinge rod assembled to the first housing and a second hinge rod assembled to the second housing are rotatably coupled to each other in a parallel state through a plurality of elements disposed at a specific interval, A selective rotation limiting means is disposed between the components, the selective rotation limiting means alternately rotating the first hinge bar and the second hinge bar; a friction torque generating means is disposed on the selective rotation limiting means Side, the friction torque generating means causes the first hinge rod and/or the second hinge rod to generate a rotation when rotating a rubbing moment; a suction means disposed on the other side of the selective rotation restricting means, the attracting means causing the first hinge rod and/or the second hinge rod to generate a suction function when rotating; an elastic means acting The friction torque generating means and the attracting means; and a stopping means for stopping the first hinge bar and/or the second hinge bar when rotating 180 degrees in different directions; wherein the friction torque generating means is The first friction washer and the second friction washer are respectively disposed on two sides of the friction plate, and the stopping means is disposed on the two The second friction washer is opposite to the other side of the friction plate, and the selective rotation limiting means includes a connecting component having a corresponding first bearing portion and a second bearing portion, the first friction The washer and the second friction pad are disposed corresponding to the first bearing portion and the second bearing portion of the connecting element, and the first friction washer and the second friction washer are coupled to the first hinge rod and the second a hinge rod is disposed to limit rotation and axial sliding of the first hinge rod and the second hinge rod; wherein the attraction means is a first cam follower, a second cam follower and at least two The elastic means comprises: the first cam follower and the second cam follower are respectively disposed corresponding to the first bearing part and the second bearing part of the connecting element, and the elastic means are connected to the first cam a follower member and the second cam follower, the first cam follower having at least one first curved cam protrusion and the second cam follower having at least one second curved cam protrusion, the first a cam follower and the second cam follower are bored by the first hinge rod and the second hinge rod to limit rotation and axial sliding of the first hinge rod and the second hinge rod, the selection The connecting element of the sexual rotation restricting means has at least one first curved cam recess corresponding to the first curved cam convex portion and the second curved cam convex portion At least one second curved cam recess, the first hinge rod and the second hinge rod are crimped to the first cam follower, the second cam follower and the connecting element by the elastic means, the first hinge When the rod and the second hinge rod rotate, the first curved cam convex portion and the second curved cam convex portion are fitted into or separated from the first curved cam concave portion and the second curved cam concave portion to control the first a hinge rod and the second hinge rod are rotated and axially slid and a suction function is generated at a specific opening angle; wherein the selective rotation limiting means is in a closed state in the first housing and the second housing Allowing one of the first hinge rod and the second hinge rod to rotate, and when the first housing and the second housing are opposite to each other, when the first hinge rod and the second hinge One of the rods rotates, and the selective rotation restricting means restricts the rotation of the other one, so that the first casing and the second casing are opened in the up-and-down direction within a total range of 360 degrees. A terminal machine using a biaxial hinge as described in claim 1 or 2.