CN104514801A - Double-shaft type pivot mechanism and related portable electronic device thereof - Google Patents

Abstract

The invention discloses a biaxial hinge mechanism and related portable electronic devices. The biaxial hinge mechanism is used to rotate a first housing relative to a second housing. The biaxial hinge mechanism includes at least one fixed component, a first rotating shaft, a first main gear, a second rotating shaft, a second main gear and a transmission gear set. The fixing component includes a first section and a second section. The first rotating shaft and the second rotating shaft are respectively provided in the first section and the second section of the fixing member, and connect the first housing and the second housing respectively. The first main gear and the second main gear are respectively disposed on the first rotating shaft and the second rotating shaft. The transmission gear set is meshed with the first main gear and the second main gear. When the first main gear rotates in a first direction, the second main gear rotates synchronously in a second direction opposite to the first direction.

Description

Biaxial hinge mechanism and related portable electronic device

technical field

The present invention relates to a biaxial hinge mechanism and its related portable electronic device, in particular to a biaxial hinge mechanism with a rotation angle of 360 degrees, low manufacturing cost and better appearance design. Hubs and their associated portable electronic devices.

Background technique

A traditional notebook computer utilizes a hinge mechanism to generate an actuation mechanism in which the screen side rotates relative to the system side. Please refer to FIG. 1 . FIG. 1 is a partial schematic diagram of a conventional hinge mechanism 10 in the prior art. The hinge mechanism 10 has a first cam 12 , a second cam 14 and a bridging wheel 16 . The first cam 12 and the second cam 14 are respectively connected to the screen end 18 and the system end 20 of the electronic device. As shown in FIG. 1 , when the screen end 18 is opened relative to the system end 20 , the first cam 12 will rotate clockwise; at this time, the second cam 14 is in a stationary state. Until the first cam 12 rotates up to one hundred and eighty degrees, after the recessed part 121 of the first cam 12 is fitted into the bridging wheel 16, the bridging wheel 16 breaks away from the recessed part 141 of the second cam 14, so that the hinge mechanism 10 can be opposite to the system End 20 rotates in a clockwise direction. Because the two cams of the hinge mechanism 10 rotate independently in different operating stages, and a torque value needs to be preset between the screen end 18 and the system end 20, the hinge mechanism 10 needs to be positioned between the first cam 12 and the second cam 14. The torsion reeds that can reach the torsion value are respectively provided. In this way, the rotating shaft of the traditional hinge mechanism is easily damaged due to the buckling of high torque value, which will increase the manufacturing cost and shorten the service life.

In addition, please refer to FIG. 2 , which is a partial schematic view of another conventional hinge mechanism 30 in the prior art. The hinge mechanism 30 has a first gear 32 and a second gear 34 . The first gear 32 is connected to the screen end 36 , the second gear 34 is connected to the system end 38 , and the first gear 32 is directly engaged with the second gear 34 . When the screen end 36 is opened relative to the system end 38 , the screen end 36 drives the first gear 32 to rotate clockwise, and the first gear 32 drives the second gear 34 to rotate counterclockwise synchronously. Conversely, when the screen end 36 is closed relative to the system end 38 , the first gear 32 rotates counterclockwise, and the second gear 34 is driven by the first gear 32 to synchronously rotate clockwise. Since the first gear 32 of the hinge mechanism 30 directly meshes with the second gear 34 , the dimensions of the two gears of the hinge mechanism 30 directly correspond to the structural height difference between the screen end 36 and the system end 38 . For example, if the notebook computer is designed with a large size, the hinge mechanism 30 needs to use a large-sized gear accordingly; if the notebook computer is designed to be thin and light, the hinge mechanism 30 needs to use a small-sized gear accordingly. In other words, for different types of notebook computers, the hinge mechanism 30 should be equipped with gears of different sizes, so the structural volume of the hinge mechanism 30 will also vary with the size of the gears. Therefore, the traditional hinge mechanism must be designed according to the model of the notebook computer, which has the disadvantages of high manufacturing cost, inconvenient assembly and poor appearance.

Contents of the invention

The purpose of the present invention is to provide a dual-axis hinge mechanism and its related portable electronic device with the advantages of low manufacturing cost and better appearance design, so as to solve the above-mentioned problems.

To achieve the above purpose, the present invention discloses a biaxial hinge mechanism for rotating a first housing relative to a second housing. The biaxial hinge mechanism includes at least one fixing piece, a first rotating shaft, a first main gear, a second rotating shaft, a second main gear and a transmission gear set. The fixing element includes a first section and a second section. The first rotating shaft is disposed on the first section of the fixing member and connected to the first housing. The first main gear is coaxially arranged on the first rotating shaft. The second rotating shaft is disposed on the second section of the fixing member and connected to the second housing. The second main gear is coaxially arranged on the second shaft. The transmission gear set is meshed between the first main gear and the second main gear. When the first main gear rotates in a first direction, the transmission gear set is pulled by the first main gear to drive the second main gear to rotate synchronously in a second direction opposite to the first direction.

According to the claimed invention, the biaxial hinge mechanism further includes a first support frame and a second support frame. The first bracket is arranged on the first rotating shaft and fixedly connected to the first housing, and the second supporting bracket is arranged on the second rotating shaft and fixedly connected to the second housing.

According to the claimed invention, the transmission gear set includes a first transmission gear and a second transmission gear. The first transmission gear meshes with the first main gear and the second transmission gear, and the second transmission gear meshes with the second main gear and the first transmission gear.

According to the claimed invention, when the first main gear rotates in the first direction, the first transmission gear rotates in the second direction, and the second transmission gear rotates in the first direction.

According to the claimed invention, the biaxial hinge mechanism further includes a plurality of torsion elements, a limiting element, and a plurality of friction pads. The plurality of torsion elements are sheathed on the first rotating shaft. The limiting member is arranged on the first rotating shaft and exerts pressure on the plurality of torsion members. The plurality of friction pads are arranged between the first main gear and the fixing piece, between the torsion piece and the fixing piece, and between the torsion piece and the limiting piece.

The present invention also discloses that the number of teeth of the first main gear is substantially greater than 12, the modulus of the first main gear is substantially greater than 0.2 millimeters, and the diameter of the pitch circle of the first main gear is the multiplication value of the number of teeth and the modulus .

According to the claimed invention, the number of teeth of the first transmission gear is substantially greater than 8, and the modulus of the first transmission gear is substantially greater than 0.2 mm.

According to the claimed invention, the tooth crown of the first main gear is substantially greater than 0.2 mm, and the outer diameter of the first main gear is the sum of the pitch circle diameter and twice the tooth crown.

According to the claimed invention, the diameter pitch of the first main gear is the value divided by the number of teeth and the diameter of the pitch circle.

According to the claimed invention, the tooth crown of the first main gear is substantially larger than 0.2 mm, and the tooth crown is the reciprocal value of the diameter pitch.

The invention also discloses a portable electronic device, which includes a first casing, a second casing and a biaxial hinge mechanism. The first casing is connected to the second casing in a relatively rotatable manner. The biaxial hinge mechanism is disposed between the first casing and the second casing, and is used for pulling the first casing to rotate relative to the second casing. The biaxial hinge mechanism includes at least one fixing piece, a first rotating shaft, a first main gear, a second rotating shaft, a second main gear and a transmission gear set. The fixing element includes a first section and a second section. The first rotating shaft is disposed on the first section of the fixing member and connected to the first housing. The first main gear is coaxially arranged on the first rotating shaft. The second rotating shaft is disposed on the second section of the fixing member and connected to the second housing. The second main gear is coaxially arranged on the second shaft. The transmission gear set is meshed between the first main gear and the second main gear. When the first main gear rotates in a first direction, the transmission gear set is pulled by the first main gear to drive the second main gear to rotate synchronously in a second direction opposite to the first direction.

According to the claimed invention, when the first casing rotates relative to the biaxial hinge mechanism along a preset direction, the biaxial hinge mechanism drives the first casing to synchronize relative to the second casing along the preset direction. turn.

According to the claimed invention, the portable electronic device further includes a connection line and a protection element. Two ends of the connection line are respectively electrically connected to the first casing and the second casing, and the connection line passes through the gap between the biaxial hinge mechanism and the first casing. The protection part covers the biaxial hinge mechanism and the connection line.

According to the claimed invention, a gear ratio of the first main gear and the second main gear is 1, and a line connecting the first main gear and the second main gear is substantially parallel to the plane normal vector of the second casing.

The present invention further discloses that the gear ratio of the first main gear and the second main gear is 0.8, and the included angle between the center line of the first main gear and the second main gear relative to the plane normal vector of the second housing Essentially 10 degrees.

The present invention also discloses that the gear ratio of the first main gear and the second main gear is 0.6, and the included angle between the center line of the first main gear and the second main gear relative to the plane normal vector of the second housing The essence is 22.5 degrees.

The present invention also discloses that the gear ratio of the first main gear and the second main gear is 0.5, and the included angle between the center line of the first main gear and the second main gear relative to the plane normal vector of the second housing Essentially 30 degrees.

The present invention also discloses that the gear ratio of the first main gear and the second main gear is 0.92, and the included angle between the center line of the first main gear and the second main gear relative to the plane normal vector of the second housing The essence is 3.75 degrees.

According to the claimed invention, the portable electronic device further includes a magnetic sensor disposed on the first casing or the second casing. The biaxial hinge mechanism further includes a magnetic element disposed on the fixing member and adjacent to the sensor. The rotation of the first housing can change the relative position of the magnetic element and the magnetic sensor. The magnetic sensor is used to sense the magnetic flux density generated by the magnetic element, and output a switching signal according to the magnitude of the magnetic flux density.

The present invention also discloses that when the magnetic sensor judges that the magnetic flux density is greater than a threshold value, the switch signal turns off the automatic flip function of a display surface of the second casing, and activates the operation function of an input interface of the second casing. . When the magnetic sensor judges that the magnetic flux density is less than the threshold value, the switching signal activates the automatic flip function of the display surface, and closes the operation function of the input interface.

According to the claimed invention, the magnetic element has a first magnetic pole and a second magnetic pole opposite to each other. The magnetic element rotates relative to the magnetic sensor with the axis of the second magnetic pole to change the relative distance between the first magnetic pole and the magnetic sensor.

According to the claimed invention, the magnetic element has a first magnetic pole and a second magnetic pole opposite to each other. The magnetic element rotates around the boundary between the first magnetic pole and the second magnetic pole, and the magnetic flux density sensed by the magnetic sensor changes with the rotation angle of the magnetic element.

The present invention does not need torsion reeds with total torsion values on the two shafts, and the torsion required by the biaxial hinge mechanism of the present invention is designed equally on the first shaft and the second shaft, that is, the first The rotating shaft and the second rotating shaft are respectively provided with torsion members with only half the torque value, which can effectively prevent the damage of the components of the biaxial hinge mechanism due to excessive external force. In addition, the present invention can be widely applied to portable electronic devices of any size. Since the gears of the biaxial hinge mechanism are of a common size, there is no need to change the size of the gear according to the volume of the portable electronic device, so the compact appearance of the biaxial hinge mechanism can still be maintained. In the present invention, multiple transmission gears are arranged between the two main gears of the biaxial hinge mechanism, and the overall structural height of the biaxial hinge mechanism can be adjusted conveniently by changing the relative positions of the transmission gears, such as staggered arrangement or linear arrangement. Compatible with any type of portable electronic device. The magnetic element changes its distance relative to the magnetic sensor with the rotation of the biaxial hinge mechanism, and the magnetic sensor switches between the operating point and the release point according to the induced magnetic flux density change, so as to automatically switch the laptop of the portable electronic device. mode and touch panel mode. The biaxial hinge mechanism and the portable electronic device of the present invention have the advantages of easy assembly, low cost, long service life and smooth and convenient operation.

Description of drawings

Fig. 1 is a partial schematic diagram of a conventional pivot mechanism of the prior art;

Fig. 2 is a partial schematic view of another conventional pivot mechanism of the prior art;

3 is a schematic diagram of a portable electronic device according to an embodiment of the present invention;

4 and 5 are schematic diagrams of the portable electronic device in different operating modes according to the embodiment of the present invention;

Fig. 6 is an exploded view of the components of the biaxial hinge mechanism of the embodiment of the present invention;

Fig. 7 is an assembly diagram of the biaxial hinge mechanism of the embodiment of the present invention;

8A and 8B are schematic diagrams of the internal structure of the biaxial hinge mechanism in different embodiments of the present invention;

9A and 9B are partial structural schematic diagrams of biaxial hinge mechanisms in different embodiments of the present invention;

FIG. 10A and FIG. 10B are partial structural schematic diagrams of biaxial hinge mechanisms in different embodiments of the present invention;

FIG. 11A and FIG. 11B are partial structural schematic diagrams of biaxial hinge mechanisms in different embodiments of the present invention;

FIG. 12A and FIG. 12B are partial structural schematic diagrams of biaxial hinge mechanisms in different embodiments of the present invention;

13A to 13G are partial schematic diagrams of the portable electronic device in different operation stages according to the embodiment of the present invention;

FIG. 14 is a partial schematic diagram of a portable electronic device according to one embodiment of the present invention;

Fig. 15 is an actuation relationship diagram between the magnetic element and the magnetic sensor according to the embodiment of the present invention;

FIG. 16 is a partial schematic diagram of a portable electronic device according to another embodiment of the present invention.

Symbol Description

10, 30 Hub institutions

12 First cam

121 depressed part

14 Second cam

141 depressed part

16 bridge wheels

18, 36 Screen side

20, 38 System side

32 First gear

34 Second gear

50 Portable Electronic Devices

52 The first shell

521 display surface

54 Second housing

541 input interface

56 Two-axis hinge mechanism

58 connecting line

60 Protection parts

62 Fixing parts

621 The first section

623 Second section

64 first reel

66 The first main gear

68 Second shaft

70 Second main gear

72 Transmission gear set

721 First drive gear

723 Second drive gear

74 The first bracket

76 Second bracket

78 Torque parts

80 Limiting parts

82 Friction gasket

84, 84' Magnetic element

86 Magnetic sensor

88 processor

D1 first direction

D2 Second direction

N Teeth

M Modulus

D pitch circle diameter

S Crown

D’ outer diameter

P diameter pitch

L The connecting line of the main gear

V the plane normal vector of the second shell

Detailed ways

Please refer to FIGS. 3 to 5. FIG. 3 is a schematic diagram of a portable electronic device 50 according to an embodiment of the present invention, and FIGS. 4 and 5 are schematic diagrams of the portable electronic device 50 in different operating modes according to an embodiment of the present invention. . The portable electronic device 50 includes a first casing 52 , a second casing 54 and two biaxial hinge mechanisms 56 . The portable electronic device 50 can be a notebook computer, and the first casing 52 is the screen end, and the second casing 54 is the system end. Two double-shaft hinge mechanisms 56 are respectively disposed between the first casing 52 and the second casing 54 , so that the first casing 52 can rotate relative to the second casing 54 by using the double-shaft hinge mechanisms 56 . The present invention is not limited to the use of two biaxial hinge mechanisms 56, it depends on actual needs. The double-shaft hinge mechanism 56 uses gears for traction, and the rotation range of the first casing 52 relative to the second casing 54 is between zero degrees and three hundred and sixty degrees.

The portable electronic device 50 switches its operation mode according to the rotation angle of the first casing 52 relative to the second casing 54 . For example, as shown in FIG. 3 , the first housing 52 and the second housing 54 of the portable electronic device 50 face the user with their display surface 521 and input interface 541 respectively. At this time, the portable electronic device 50 For the use mode of notebook computer. Wherein, the display surface 521 is a display panel at the screen end, and the input interface 541 is a keyboard or a touch pad at the system end. As shown in FIG. 4 , the display surface 521 of the first housing 52 faces the user, and the input interface 541 of the second housing 54 faces away from the user, but there is a clamp between the first housing 52 and the second housing 54 . At this time, the portable electronic device 50 is in the standing mode of the touch panel. Wherein, the first housing 52 needs to be a screen end with a touch screen. As shown in FIG. 5 , the display surface 521 of the first housing 52 faces the user, and the back of the second housing 54 is directly attached to the back of the first housing 52 , which means that the first housing 52 is substantially parallel to the second housing. The casing 54 . At this time, the portable electronic device 50 is in the tablet mode of the touch panel.

As shown in FIG. 3 , the portable electronic device 50 may further include a connecting wire 58 and a protection member 60 . Both ends of the connecting wire 58 have joints, which are electrically connected to the electronic components of the first casing 52 and the second casing 54 respectively, so as to transfer the electronic signal from the system side to the screen side. The connection line 58 is arranged in the gap between the biaxial hinge mechanism 56 and the adjacent housing, and the connection line 58 can be provided at any position that does not hinder the operation of the gears. The protection member 60 has functions of dustproof and decoration, and is used to cover the biaxial hinge mechanism 56 and the connecting wire 58 . The protective part 60 can prevent dust or foreign matter from being stuck into the gears of the biaxial hinge mechanism 56 to ensure the smooth operation of the biaxial hinge mechanism 56, and the protective part 60 can also have the function of covering the biaxial hinge mechanism 56 to beautify The appearance of the portable electronic device 50 .

Please refer to FIG. 6 and FIG. 7 , FIG. 6 is an exploded view of the biaxial hinge mechanism 56 according to the embodiment of the present invention, and FIG. 7 is an assembly view of the biaxial hinge mechanism 56 according to the embodiment of the present invention. The biaxial hinge mechanism 56 includes a plurality of fixed parts 62, a first rotating shaft 64, a first main gear 66, a second rotating shaft 68, a second main gear 70, a transmission gear set 72, a first bearing The frame 74 , a second frame 76 , a plurality of torsion elements 78 , two limiting elements 80 and a plurality of friction pads 82 . The protection piece 60 can be fixed on one of the fixing pieces 62 to achieve the purpose of covering the biaxial hinge mechanism 56 . In addition, the first rotating shaft 64 , the second rotating shaft 68 and a portion of the friction pad 82 are disposed between two of the plurality of fixing members 62 . The torsion element 78 , the limiting element 80 and a part of the friction pad 82 are further disposed between two of the plurality of fixing elements 62 . The fixing part 62 is a long strip structure, which is divided into a first section 621 and a second section 623 according to the upper and lower positions, which are respectively used to arrange the corresponding rotating shaft, gear and bracket and other components, thereby isolating adjacent components to prevent the occurrence of structural interference.

The first rotating shaft 64 is disposed between the first sections 621 of two adjacent fixing members 62 . Part of the first rotating shaft 64 protrudes from one of the fixing parts 62 and is connected to the first casing 52 . The first main gear 66 sleeves the first rotating shaft 64 through a wedge-shaped hole, so that the first main gear 66 is sleeved on the first rotating shaft 64 in a coaxial rotation manner. Similarly, the second rotating shaft 68 is correspondingly disposed between the second section 623 of the fixing member 62 and connected to the second housing 54, and the second main gear 70 is also sleeved on the second rotating shaft 68 through a wedge-shaped hole, so as to To achieve the purpose of coaxial rotation. The transmission gear set 72 may consist of an even number of pinion gears, which means that the gear size of the transmission gear set 72 is smaller than that of the main gear. For example, the transmission gear set 72 may at least include a first transmission gear 721 and a second transmission gear 723, the first transmission gear 721 meshes between the first main gear 66 and the second transmission gear 723, and the second transmission gear The gear 723 is meshed between the second main gear 70 and the first transmission gear 721 . Since the transmission gear set 72 is meshed between the first main gear 66 and the second main gear 70, when the first main gear 66 rotates along a first direction D1, the transmission gear set 72 is pulled by the first main gear 66, so that The second main gear 70 is driven to rotate synchronously along a second direction D2 opposite to the first direction D1.

As shown in FIG. 6 and FIG. 7 , a plurality of torsion elements 78 are sheathed on the first shaft 64 and the second shaft 68 respectively. The torsion elements 78 are spring washers for providing friction to generate torsion. The limiting member 80 can be a nut, and the two limiting members 80 are respectively arranged at one end of the first rotating shaft 64 and the second rotating shaft 68 . The limiting member 80 is usually mounted on the rotating shaft in a locking manner, thereby pressing the plurality of torsion members 78 to generate corresponding torsion forces. The magnitude of the torsion force can vary with the locking depth of the limiting member 80 on the rotating shaft. A plurality of friction pads 82 are respectively arranged between the first main gear 66 and the adjacent fixing member 62 , between the second main gear 70 and the adjacent fixing member 62 , between each torsion member 78 and the adjacent fixing member 78 Between, and between each torsion member 78 and the corresponding limiting member 80 . The function of the friction pads 82 is to avoid wear between the elements. In order to allow the biaxial hinge mechanism 56 to stably engage the first casing 52 and the second casing 54, the first bracket 74 and the second bracket 76 are respectively arranged on the first rotating shaft 64 and the second rotating shaft 68 to be fixedly connected The first casing 52 and the second casing 54 . The bearing bracket can be directly arranged on the end of the rotating shaft protruding from the fixing member 62, such as the second bearing bracket 76; 74. However, the actual usage is not limited to this, and it depends on the design requirements.

Please refer to FIG. 8A and FIG. 8B . FIG. 8A and FIG. 8B are schematic diagrams of the internal structure of the biaxial hinge mechanism 56 according to different embodiments of the present invention. The dimensions of the first main gear 66 and the second main gear 70 are preferably larger than those of the first transmission gear 721 and the second transmission gear 723 . The size of the first main gear 66 may be substantially greater than, smaller than or equal to the size of the second main gear 70 depending on design requirements, and its related implementation will be described later. When the first main gear 66 rotates along the first direction D1, the first transmission gear 721 rotates along the second direction D2, and the second transmission gear 723 rotates along the first direction D1 to drive the second main gear 70 along the second direction. Direction D2 produces synchronous rotation. The relative position change of the transmission gear can adjust the overall structural height of the biaxial hinge mechanism 56 .

As shown in FIG. 8A , the first transmission gear 721 and the second transmission gear 723 are alternately arranged between the first main gear 66 and the second main gear 70 . A thin portable electronic device 50 . On the other hand, in order to cooperate with different types of portable electronic devices 50, the first housing 52 and the second housing 54 may require a larger space, then the biaxial hinge mechanism 56 of the present invention does not need to change the main gear and transmission. The size of the gear only needs to adjust the arrangement position of the transmission gear set 72 . As shown in FIG. 8B, the first transmission gear 721 and the second transmission gear 723 are arranged straight on the line L connecting the first main gear 66 and the second main gear 70, so that the biaxial hinge mechanism 56 can have a relatively small The high structural height is suitable for large-sized portable electronic devices 50 .

It is worth mentioning that each gear of the double-shaft hinge mechanism 56 has its optimum size limit. For example, the number of teeth N of the first main gear 66 (or the second main gear 70) is preferably greater than 12, and the module M of the first main gear 66 (or the second main gear 70) is preferably greater than 0.2 mm; the number of teeth N of the first transmission gear 721 (or the second transmission gear 723) is preferably greater than 8, and the modulus M of the first transmission gear 721 (or the second transmission gear 723) is preferably greater than 0.2 mm. In this way, the present invention can design the parameters of the main gear and the transmission gear used in the biaxial hinge mechanism 56 according to the following formulas under the constraints of the number of teeth N and the modulus M:

D=M×N (Formula 1)

D'=D+2×S (Formula 2)

P=N/D (Formula 3)

S=1/P (Formula 4)

Wherein, the pitch circle diameter D of the main gear and the transmission gear is substantially equal to the arithmetic value of the number of teeth N multiplied by the modulus M thereof, as shown in formula 1. The pitch circle diameter D needs to be sized to at least wrap around the shaft and still have sufficient strength. The pitch circle diameter D is preferably greater than 4 mm, but it varies with the size of the shaft. The module M is the size of the meshing of the main gear and the transmission gear, which needs to be able to absorb the tolerance and have sufficient strength. The tooth crown S of the main gear and the transmission gear is preferably greater than 0.2 mm, which can avoid the error of idle travel caused by inaccurate meshing between the gears. Correspondingly, the outer diameter D' of the main gear and the transmission gear is substantially equal to the arithmetic value of its pitch circle diameter D plus its twice crown S, as shown in formula 2. In addition, the diametral pitch P of the main gear and transmission gear is substantially equal to the arithmetic value of dividing the number of teeth N by its pitch circle diameter D, and the tooth crown S can be substantially equal to the reciprocal value of the diametral pitch P, such as formula 3 and formula 4. In this way, only by designing the gears according to the above formula and dimensional reference values can it be ensured that the first main gear 66 and the second main gear 70 have sufficient structural strength to withstand the torque value required by the biaxial hinge mechanism 56, and the transmission gear set 72 can be stably meshed between the first main gear 66 and the second main gear 70 , so that the change in the rotation angle of the first main gear 66 can be correctly synchronized with the change in the rotation angle of the second main gear 70 .

With the different gear ratios between the first main gear 66 and the second main gear 70 of the biaxial hinge mechanism 56 , the ratio of the rotation angle of the first main gear 66 relative to the second main gear 70 is also different. As long as the division value of the number of teeth of the first main gear 66 and the second main gear 70 is an integer (without an infinite loop value), the gear ratio can be applied to the double-shaft hinge mechanism 56 of the present invention. As shown in FIG. 8 , the gear ratio of the first main gear 66 to the second main gear 70 is 1, so the rotation angle of the first main gear 66 is substantially the same as the rotation angle of the second main gear 70 within a unit time. When the portable electronic device 50 is to be switched from the notebook computer mode shown in FIG. 3 to the tablet mode of the touch panel shown in FIG. The second housing 54 (system end) is likewise rotated one hundred and eighty degrees. Since the rotation angles of the first housing 52 and the second housing 54 are substantially synchronous and identical, the biaxial hinge mechanism 56 is substantially parallel to the second housing with the line L connecting the first main gear 66 and the second main gear 70 The plane normal vector V of 54 is arranged between the screen side and the system side, thereby ensuring the smoothness of use of the portable electronic device 50 . Several other implementations are as follows.

Please refer to FIG. 9A and FIG. 9B . FIG. 9A and FIG. 9B are partial structural diagrams of a biaxial hinge mechanism 56 according to another embodiment of the present invention. The gear ratio of the first main gear 66 and the second main gear 70 may be 0.8. As shown in FIG. 9A, when the first main gear 66 is larger than the second main gear 70, and the portable electronic device 50 is switched from the use mode of the notebook computer to the tablet mode of the touch panel, the first housing 52 (screen The maximum rotation angle of the screen end) is one hundred and sixty degrees, and the maximum rotation angle of the second housing 54 (system end) is two hundred degrees; as shown in Figure 9B, when the first main gear 66 is smaller than the second main gear 70, When the portable electronic device 50 switches between the use mode of the notebook computer and the tablet mode of the touch panel, the maximum rotation angle of the first casing 52 (screen side) is two hundred degrees, and the second casing 54 ( system side) the maximum rotation angle is 160 degrees. The reversed positions of the first housing 52 and the second housing 54 are shown as dotted-line frames in FIG. 9A and FIG. 9B . In response to the change of the gear ratio, the biaxial hinge mechanism 56 of the present embodiment makes an included angle of 10 degrees between the line L connecting the first main gear 66 and the second main gear 70 with respect to the plane normal vector V of the second housing 54 The method is set between the screen side and the system side.

Please refer to FIG. 10A and FIG. 10B . FIG. 10A and FIG. 10B are partial structural diagrams of a biaxial hinge mechanism 56 according to another embodiment of the present invention. The gear ratio of the first main gear 66 and the second main gear 70 may be 0.6. As shown in FIG. 10A, when the first main gear 66 is larger than the second main gear 70, and the portable electronic device 50 switches between the use mode of the notebook computer and the tablet mode of the touch panel, the first casing 52 (the touch panel) The maximum rotation angle of the screen end) is 135 degrees, and the maximum rotation angle of the second housing 54 (system end) is 225 degrees; as shown in Figure 10B, when the first main gear 66 is smaller than the first main gear 66 Two main gears 70, when the portable electronic device 50 switches between the use mode of the notebook computer and the tablet mode of the touch panel, the maximum rotation angle of the first casing 52 (screen end) is 225 degrees, and the maximum rotation angle of the second housing 54 (system end) is one hundred and thirty-five degrees. The reversed positions of the first housing 52 and the second housing 54 are shown in the dotted frame in FIG. 10 . The biaxial hinge mechanism 56 of this embodiment is arranged on the screen in such a way that the connecting line L of the first main gear 66 and the second main gear 70 is substantially at an angle of 22.5 degrees with respect to the plane normal vector V of the second housing 54 between the end and the system end.

Please refer to FIG. 11A and FIG. 11B . FIG. 11A and FIG. 11B are partial structural diagrams of a biaxial hinge mechanism 56 according to another embodiment of the present invention. The gear ratio of the first main gear 66 and the second main gear 70 may be 0.5. As shown in FIG. 11A, when the first main gear 66 is larger than the second main gear 70, and the portable electronic device 50 is switched from the use mode of the notebook computer to the tablet mode of the touch panel, the first casing 52 (the touch panel) The maximum rotation angle of the screen end) is one hundred and twenty degrees, and the maximum rotation angle of the second housing 54 (system end) is two hundred and forty degrees; on the other hand, as shown in FIG. 11B, when the first main gear 66 Smaller than the second main gear 70, when the portable electronic device 50 switches between the use mode of the notebook computer and the tablet mode of the touch panel, the maximum rotation angle of the first housing 52 (screen end) is 240 Ten degrees, and the maximum rotation angle of the second housing 54 (system end) is one hundred and twenty degrees. The rotated positions of the first casing 52 and the second casing 54 are shown as dotted-line frames in FIG. 11A and FIG. 11B . The biaxial hinge mechanism 56 of this embodiment is arranged on the screen in such a way that the connecting line L of the first main gear 66 and the second main gear 70 is substantially at an angle of 30 degrees with respect to the plane normal vector V of the second housing 54. between the end and the system end.

Please refer to FIG. 12A and FIG. 12B . FIG. 12A and FIG. 12B are partial structural diagrams of a biaxial hinge mechanism 56 according to another embodiment of the present invention. The gear ratio of the first main gear 66 and the second main gear 70 may be 0.92. As shown in FIG. 12A, when the first main gear 66 is larger than the second main gear 70, and the portable electronic device 50 switches between the use mode of the notebook computer and the tablet mode of the touch panel, the first housing 52 (the touch panel The maximum rotation angle of the screen end) is 172.5 degrees, and the maximum rotation angle of the second housing 54 (system end) is 187.5 degrees; as shown in Figure 12B, when the first main The gear 66 is smaller than the second main gear 70. When the portable electronic device 50 switches between the use mode of the notebook computer and the tablet mode of the touch panel, the maximum rotation angle of the first casing 52 (screen end) is one. 187.5 degrees, and the maximum rotation angle of the second housing 54 (system side) is 172.5 degrees. The rotated positions of the first housing 52 and the second housing 54 are shown as dotted-line boxes in FIG. 12A and FIG. 12B . The dual-axis hinge mechanism 56 of this embodiment is arranged on the screen in such a way that the connecting line L between the first main gear 66 and the second main gear 70 is substantially at an angle of 3.75 degrees with respect to the plane normal vector V of the second housing 54 . between the end and the system end.

To sum up, the biaxial hinge mechanism 56 of the present invention sets the transmission gear set 72 between the first main gear 66 and the second main gear 70, when the first main gear 66 moves along a specific direction (such as the first direction) When D1) rotates, the transmission gear set 72 can drive the second main gear 70 to rotate synchronously in another direction opposite to the specified direction (eg, the second direction D2 ). From the overall appearance of the portable electronic device 50, when the user opens the first casing 52, the first casing 52 can rotate relative to the biaxial hinge mechanism 56 along a preset direction (such as the first direction D1). At the same time, the biaxial hinge mechanism 56 will rotate synchronously relative to the second housing 54 along the preset direction due to the rotation of the first housing 52, so that the first housing 52 can be expanded relative to the second housing 54 . Wherein, the included angle between the center line L of the first main gear 66 and the second main gear 70 relative to the plane normal vector V of the second housing 54 is not limited to the above-mentioned embodiment, and depends on the design requirements; The maximum rotation angle at the end of the sum system also changes according to the angle between the center line L and the plane normal vector V, and will not be described in detail here.

Please refer to FIG. 13A to FIG. 13G . FIG. 13A to FIG. 13G are partial schematic diagrams of the portable electronic device 50 in different operation stages according to the embodiment of the present invention. In FIG. 13A, the portable electronic device 50 is in the closed mode of the notebook computer. Next, as shown in FIG. 13A to FIG. 13C , the first casing 52 of the portable electronic device 50 is unfolded to switch to the use mode of a notebook computer. Next, as shown in FIG. 13C to FIG. 13F , the first housing 52 further increases its flip angle relative to the second housing 54 to switch the portable electronic device 50 to the standing mode of the touch panel. Finally, as shown in FIGS. 13F to 13G , the back of the first casing 52 abuts against the back of the second casing 54 , so that the portable electronic device 50 switches to the tablet mode of the touch panel.

Please refer to FIG. 14 . FIG. 14 is a partial schematic diagram of a portable electronic device 50 according to one embodiment of the present invention. The use mode of the portable electronic device 50 changes with the relative rotation of the first casing 52 and the second casing 54, so the functions of the display surface 521 and the input interface 541 also follow the actuation of the biaxial hinge mechanism 56 And switch. The biaxial hinge mechanism 56 can further include a magnetic element 84 disposed on the fixing member 62 . The magnetic element 84 has opposite first magnetic poles N and second magnetic poles S, and has a strip structure. The portable electronic device 50 further includes a magnetic sensor 86 disposed on the first casing 52 or the second casing 54 . Here, the magnetic sensor 86 disposed on the second casing 54 is taken as an example. The magnetic sensor 86 can be a Hall sensor (Hall IC), which is disposed adjacent to the magnetic element 84 and can output a signal to drive the processor 88 of the portable electronic device 50 . When the first housing 52 and the second housing 54 rotate relative to each other, the magnetic element 84 rotates relative to the magnetic sensor 86 around the second magnetic pole S, and accordingly changes the relative distance between the first magnetic pole N and the magnetic sensor 86 . The magnetic sensor 86 can output a switching signal for controlling the display surface 521 or the input interface 541 according to the change of the magnetic flux density.

When the rotation angle of the magnetic element 84 is substantially between 0 and 90 degrees, the rotation angle of the first housing 52 relative to the second housing 54 is substantially between 0 and 180 degrees, and the portable electronic device 50 is a laptop. model. When the rotation angle of the magnetic element 84 is substantially between 90-180 degrees, the rotation angle of the first housing 52 relative to the second housing 54 is substantially between 180-360 degrees, and the portable electronic device 50 is a touch panel mode. Therefore, when the magnetic element 84 rotates to approximately 90 degrees, the magnetic flux density induced by the magnetic sensor 86 is minimum, and the processor 88 automatically switches the operation mode of the portable electronic device 50 according to the switching signal of the magnetic sensor 86 .

Please refer to FIG. 15 . FIG. 15 is an actuation relationship diagram between the magnetic element 84 and the magnetic sensor 86 according to the embodiment of the present invention. The actuation relationship described in FIG. 15 is applicable to the portable electronic device 50 shown in FIG. 14 . When the biaxial hinge mechanism 56 (or the magnetic element 84) rotates clockwise from 0° to 87° to 108.3°, the magnetic flux density induced by the magnetic sensor 86 gradually decreases from the maximum positive value to less than 2.2Tesla. The sensor 86 is switched from an operation point to a release point. The magnetic sensor 86 outputs a switching signal to enable the automatic flip function of the display surface 521 and close the operation function of the input interface 541 through the processor 88, and the portable electronic device 50 is switched to the touch panel mode. On the other hand, when the biaxial hinge mechanism 56 (or the magnetic force element 84) rotates from 180 degrees to the range of 95.4-74 degrees in the counterclockwise direction, the magnetic flux density induced by the magnetic sensor 86 gradually increases from the maximum negative value to greater than 3.0 Tesla, the magnetic sensor 86 is switched from the release point to the operation point, and the switching signal output by it will trigger the processor 88 to close the automatic flip function of the display surface 521 and start the operation function of the input interface 541, and the portable electronic device 50 is switched to laptop mode.

In particular, the range of the threshold value depends on the properties of the magnetic element 84 and the magnetic sensor 86 . In this embodiment, the threshold value is preferably designed to be between 2.2-3.0 Tesla, but it is not limited thereto. The switching characteristics of the magnetic sensor 86 , the specific angle for triggering the magnetic sensor 86 by the biaxial hinge mechanism 56 , and the magnetic pole pattern of the magnetic element 84 are not limited to the above-mentioned embodiments, but depend on design requirements.

Please refer to FIG. 16 . FIG. 16 is a partial schematic diagram of a portable electronic device 50 according to another embodiment of the present invention. In this embodiment, elements with the same numbers as those in the embodiment shown in FIG. 14 have the same structure and function, and will not be described again here. The difference between this embodiment and the previous embodiments is that the magnetic element 84' can be a ring structure. The first magnetic pole N and the second magnetic pole S are respectively semi-arc units, and the two ends of the semi-arc units are connected to form a ring-shaped magnetic element 84'. The magnetic element 84' can rotate around the boundary between the first magnetic pole N and the second magnetic pole S. When the first magnetic pole N or the second magnetic pole S of the magnetic element 84' faces the magnetic sensor 86, the magnetic sensor 86 can sense a larger magnetic flux density. When the magnetic element 84' rotates with the biaxial hinge mechanism 56 to an angle of approximately 90 degrees, the magnetic flux density induced by the magnetic sensor 86 is at a minimum and can be switched between the operating point and the releasing point. For example: when the magnetic element 84' rotates clockwise from 0 degrees to a position greater than 90 degrees, the magnetic sensor 86 actuates the processor 88 of the portable electronic device 50, so that the processor 88 will The portable electronic device 50 switches to the touch panel mode. When the magnetic element 84' rotates counterclockwise from a position of 180 degrees to a position less than 90 degrees, the magnetic sensor 86 actuates the processor 88 to switch the portable electronic device 50 into a notebook mode according to the change of the magnetic flux density .

Compared with the prior art, the present invention does not need torsion reeds with total torsion values on the two shafts, and the torsion required by the biaxial hinge mechanism of the present invention is designed equally between the first shaft and the second shaft. On the other hand, it means that the first rotating shaft and the second rotating shaft are provided with torsion members with only half the torsion value, which can effectively prevent the components of the biaxial hinge mechanism from being damaged due to excessive external force. In addition, the present invention can be widely applied to portable electronic devices of any size. Since the gears of the biaxial hinge mechanism are of a common size, there is no need to change the size of the gear according to the volume of the portable electronic device, so the compact appearance of the biaxial hinge mechanism can still be maintained. In the present invention, multiple transmission gears are arranged between the two main gears of the biaxial hinge mechanism, and the overall structural height of the biaxial hinge mechanism can be adjusted conveniently by changing the relative positions of the transmission gears, such as staggered arrangement or linear arrangement. Compatible with any type of portable electronic device. The magnetic element changes its distance relative to the magnetic sensor with the rotation of the biaxial hinge mechanism, and the magnetic sensor switches between the operating point and the release point according to the induced magnetic flux density change, so as to automatically switch the laptop of the portable electronic device. mode and touch panel mode. The biaxial hinge mechanism and the portable electronic device of the present invention have the advantages of easy assembly, low cost, long service life and smooth and convenient operation.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (37)

1. A biaxial hinge mechanism for rotating a first casing relative to a second casing, the biaxial hinge mechanism comprising: at least one fixing piece, including a first section and a second section; a first rotating shaft, disposed on the first section of the fixing member, and connected to the first housing; the first main gear is coaxially arranged on the first rotating shaft; a second rotating shaft, disposed on the second section of the fixing member, and connected to the second housing; the second main gear is coaxially rotatable on the second rotating shaft; and The transmission gear set is meshed between the first main gear and the second main gear. When the first main gear rotates in a first direction, the transmission gear set is pulled by the first main gear to drive the second main gear. The main gear rotates synchronously in a second direction opposite to the first direction. 2. The biaxial hinge mechanism as claimed in claim 1, wherein the biaxial hinge mechanism further comprises: a first bracket, arranged on the first rotating shaft and fixedly connected to the first casing; and The second bracket is arranged on the second rotating shaft and fixedly connected to the second casing. 3. The biaxial hinge mechanism as claimed in claim 2, wherein the transmission gear set comprises a first transmission gear and a second transmission gear, the first transmission gear meshes with the first main gear and the second transmission gear, The second transmission gear meshes with the second main gear and the first transmission gear. 4. The biaxial hinge mechanism as claimed in claim 3, wherein when the first main gear rotates in the first direction, the first transmission gear rotates in the second direction, and the second transmission gear rotates in the second direction. Rotate in one direction. 5. The biaxial hinge mechanism as claimed in claim 4, wherein the biaxial hinge mechanism further comprises: a plurality of torsion elements sleeved on the first rotating shaft; a limiting member, which is provided with the first rotating shaft and exerts pressure on the plurality of torsion members; and A plurality of friction pads are arranged between the first main gear and the fixing piece, between the torsion piece and the fixing piece, and between the torsion piece and the limiting piece. 6. The biaxial hinge mechanism according to claim 4, wherein the number of teeth of the first main gear is substantially greater than 12, the modulus of the first main gear is substantially greater than 0.2 mm, and the pitch circle of the first main gear The diameter is the product of the number of teeth and the modulus. 7. The biaxial hinge mechanism as claimed in claim 3, wherein the number of teeth of the first transmission gear is substantially greater than 8, and the modulus of the first transmission gear is substantially greater than 0.2 mm. 8. The biaxial hinge mechanism as claimed in claim 6, wherein the crown of the first main gear is substantially greater than 0.2 mm, and the outer diameter of the first main gear is the pitch circle diameter plus twice the crown total value. 9. The biaxial hinge mechanism as claimed in claim 6, wherein the pitch of the first main gear is the value of dividing the pitch circle diameter by the number of teeth. 10. The biaxial hinge mechanism as claimed in claim 9, wherein the tooth crown of the first main gear is substantially greater than 0.2 mm, and the tooth crown is the reciprocal value of the diametral pitch. 11. The biaxial hinge mechanism as claimed in claim 5, wherein the gear ratio of the first main gear and the second main gear is 1, 0.92, 0.8, 0.6 or 0.5. 12. The double-shaft hinge mechanism as claimed in claim 1, wherein the gear ratio of the first main gear and the second main gear is 1, 0.92, 0.8, 0.6 or 0.5. 13. The biaxial hinge mechanism according to claim 1, wherein the number of teeth of the first main gear is substantially greater than 12, the modulus of the first main gear is substantially greater than 0.2 mm, and the pitch circle of the first main gear The diameter is the product of the number of teeth and the modulus. 14. The biaxial hinge mechanism according to claim 13, wherein the crown of the first main gear is substantially greater than 0.2 mm, and the outer diameter of the first main gear is the pitch circle diameter plus twice the crown total value. 15. The biaxial hinge mechanism as claimed in claim 13, wherein the diameter pitch of the first main gear is the value of dividing the pitch circle diameter by the number of teeth. 16. The biaxial hinge mechanism as claimed in claim 15, wherein the tooth crown of the first main gear is substantially greater than 0.2 mm, and the tooth crown is the reciprocal value of the diametral pitch. 17. A portable electronic device comprising: first shell; a second housing, the first housing is relatively rotatably connected to the second housing; and The biaxial hinge mechanism is arranged between the first casing and the second casing, and is used to pull the first casing to rotate relative to the second casing. The biaxial hinge mechanism includes: at least one fixing piece, including a first section and a second section; a first rotating shaft, disposed on the first section of the fixing member, and connected to the first housing; the first main gear is coaxially arranged on the first rotating shaft; a second rotating shaft, disposed on the second section of the fixing member, and connected to the second housing; the second main gear is coaxially rotatable on the second rotating shaft; and The transmission gear set is meshed between the first main gear and the second main gear. When the first main gear rotates in a first direction, the transmission gear set is pulled by the first main gear to drive the second main gear. The main gear rotates synchronously in a second direction opposite to the first direction. 18. The portable electronic device as claimed in claim 17, wherein when the first casing rotates relative to the biaxial hinge mechanism along a predetermined direction, the biaxial hinge mechanism drives the first casing along the synchronously rotate relative to the second housing along the preset direction. 19. The portable electronic device as claimed in claim 17, further comprising: a connection line, the two ends of which are respectively electrically connected to the first casing and the second casing, and the connection line passes through the gap between the biaxial hinge mechanism and the first casing; and The protection part covers the biaxial hinge mechanism and the connection line. 20. The portable electronic device as claimed in claim 17, wherein the biaxial hinge mechanism further comprises: a first bracket, arranged on the first rotating shaft and fixedly connected to the first casing; and The second bracket is arranged on the second rotating shaft and fixedly connected to the second casing. 21. The portable electronic device as claimed in claim 17, wherein the transmission gear set comprises a first transmission gear and a second transmission gear, the first transmission gear meshes with the first main gear and the second transmission gear, The second transmission gear meshes with the second main gear and the first transmission gear. 22. The portable electronic device as claimed in claim 21, wherein when the first main gear rotates in the first direction, the first transmission gear rotates in the second direction, and the second transmission gear rotates in the second direction. Rotate in one direction. 23. The portable electronic device as claimed in claim 17, wherein the biaxial hinge mechanism further comprises: a plurality of torsion elements sleeved on the first rotating shaft; a limiting member, which is provided with the first rotating shaft and exerts pressure on the plurality of torsion members; and A plurality of friction pads are arranged between the first main gear and the fixing piece, between the torsion piece and the fixing piece, and between the torsion piece and the limiting piece. 24. The portable electronic device as claimed in claim 17, wherein the number of teeth of the first main gear is substantially greater than 12, the modulus of the first main gear is substantially greater than 0.2 mm, and the pitch circle of the first main gear The diameter is the product of the number of teeth and the modulus. 25. The portable electronic device as claimed in claim 21, wherein the number of teeth of the first transmission gear is substantially greater than 8, and the modulus of the first transmission gear is substantially greater than 0.2 mm. 26. The portable electronic device as claimed in claim 24, wherein the crown of the first main gear is substantially greater than 0.2 mm, and the outer diameter of the first main gear is the pitch circle diameter plus twice the crown total value. 27. The portable electronic device as claimed in claim 24, wherein the pitch of the first main gear is the value of dividing the pitch circle diameter by the number of teeth. 28. The portable electronic device as claimed in claim 27, wherein the crown of the first main gear is substantially larger than 0.2 mm, and the crown is the reciprocal value of the radial pitch. 29. The portable electronic device as claimed in claim 17, wherein the gear ratio of the first main gear and the second main gear is 1, and the connecting lines between the first main gear and the second main gear are substantially parallel to the plane normal vector of the second shell. 30. The portable electronic device as claimed in claim 17, wherein the gear ratio of the first main gear and the second main gear is 0.8, and the line connecting the first main gear and the second main gear is relative to The included angle between the plane normal vectors of the second shell is substantially 10 degrees. 31. The portable electronic device as claimed in claim 17, wherein the gear ratio of the first main gear and the second main gear is 0.6, and the line connecting the first main gear and the second main gear is relative to The included angle between the plane normal vectors of the second shell is substantially 22.5 degrees. 32. The portable electronic device as claimed in claim 17, wherein the gear ratio of the first main gear and the second main gear is 0.5, and the line connecting the first main gear and the second main gear is relative to The included angle between the plane normal vectors of the second casing is substantially 30 degrees. 33. The portable electronic device as claimed in claim 17, wherein the gear ratio of the first main gear and the second main gear is 0.92, and the line connecting the first main gear and the second main gear is relative to The included angle between the plane normal vectors of the second shell is substantially 3.75 degrees. 34. The portable electronic device as claimed in claim 17, wherein the portable electronic device further comprises a magnetic sensor disposed on the first casing or the second casing, and the biaxial hinge mechanism is further A magnetic element is included, the magnetic element is arranged on the fixing part and adjacent to the sensor, the rotation of the first housing changes the relative position of the magnetic element and the magnetic sensor, and the magnetic sensor is used to sense the magnetic flux generated by the magnetic element density, and output a switching signal according to the magnitude of the magnetic flux density. 35. The portable electronic device as claimed in claim 34, wherein when the magnetic sensor judges that the magnetic flux density is greater than a threshold value, the switching signal closes the automatic flip function of a display surface of the second housing and activates The operation function of an input interface of the second housing, when the magnetic sensor judges that the magnetic flux density is less than the threshold value, the switching signal activates the automatic flip function of the display surface and closes the operation function of the input interface. 36. The portable electronic device as claimed in claim 34, wherein the magnetic element has opposite first magnetic poles and second magnetic poles, and the magnetic element rotates relative to the magnetic sensor with the axis of the second magnetic pole to change the The relative distance between the first magnetic pole and the magnetic sensor. 37. The portable electronic device as claimed in claim 34, wherein the magnetic element has opposite first magnetic poles and second magnetic poles, and the magnetic element rotates around the boundary between the first magnetic pole and the second magnetic pole, The magnetic flux density sensed by the magnetic sensor varies with the rotation angle of the magnetic element.