WO2016189589A1

WO2016189589A1 - Electronic device

Info

Publication number: WO2016189589A1
Application number: PCT/JP2015/064784
Authority: WO
Inventors: 信彦恩田
Original assignee: 富士通株式会社
Priority date: 2015-05-22
Filing date: 2015-05-22
Publication date: 2016-12-01

Abstract

This electronic device (10) is provided with a stationary unit (20), a movable unit (12), and a slide mechanism (70). The movable unit (12) is coupled to the back side of the stationary unit (20) via a rotation shaft (56), and opens and closes relative to the stationary unit (20) in accordance with a rotation about the rotation shaft (56). The slide mechanism (70) slides the rotation shaft (56) toward the front side of the stationary unit (20) in accordance with the opening of the movable unit (12) relative to the stationary unit (20).

Description

Electronics

The technology disclosed by the present application relates to electronic equipment.

There are electronic devices that include a fixed unit and a movable unit that is connected to the rear side of the fixed unit via a rotating shaft and opens and closes the fixed unit. Further, in this type of electronic device, there is an electronic device provided with a support arm that protrudes rearward from the rear end portion of the fixed unit with the opening of the movable unit with respect to the fixed unit and suppresses the electronic device from falling to the rear side. (For example, refer to Patent Documents 1 and 2).

JP-A-9-292931 Japanese Patent Laid-Open No. 2-112010

However, in the above electronic device, the support arm protrudes from the rear end portion of the fixed unit to the rear side, so that the installation space for the electronic device may be widened.

The technology disclosed in the present application is, as one aspect, aimed at reducing the installation space for electronic devices.

In the technology disclosed in the present application, an electronic device includes a fixed unit, a movable unit, and a slide mechanism. The movable unit is connected to the rear side of the fixed unit via a rotation shaft, and opens and closes with respect to the fixed unit as the rotation is performed about the rotation shaft. The slide mechanism slides the rotation shaft to the front side of the fixed unit as the movable unit is released from the fixed unit.

According to the technology disclosed in the present application, as one aspect, the installation space for the electronic device can be reduced.

FIG. 1 is a perspective view of a state in which a movable unit is opened with respect to a fixed unit as viewed from the front side in an electronic apparatus according to an embodiment. FIG. 2 is a perspective view of a state in which the movable unit is opened with respect to the fixed unit as viewed from the front side in the electronic apparatus according to the embodiment. FIG. 3 is a perspective view of a state in which the movable unit is opened with respect to the fixed unit as viewed from the rear side in the electronic apparatus according to the embodiment. FIG. 4 is a perspective view of a state in which the movable unit is closed with respect to the fixed unit as viewed from the rear side in the electronic apparatus according to the embodiment. FIG. 5 is a perspective view of the hinge unit shown in FIG. 1 as viewed from the front side. 6 is an enlarged perspective view showing one side of the hinge unit shown in FIG. FIG. 7 is an exploded perspective view showing the main body portion and the cover portion of the extending portion shown in FIG. FIG. 8 is a plan view of the rear side of the fixed unit shown in FIG. 5 as viewed from the upper side in the vertical direction. 9 is an enlarged perspective view showing the slide mechanism shown in FIG. 10 is a front view of the slide mechanism shown in FIG. 9 as viewed from the front side. 11 is a cross-sectional view corresponding to the cross-sectional view taken along the line F11-F11 of FIG. 8 in a closed state where the movable unit is closed with respect to the fixed unit. 12 is a cross-sectional view corresponding to the cross-sectional view taken along the line F11-F11 in FIG. 8 in an open state in which the movable unit is opened with respect to the fixed unit. 13 is a cross-sectional view corresponding to the cross-sectional view taken along line F13-F13 of FIG. 8 in a closed state in which the movable unit is closed with respect to the fixed unit. 14 is a cross-sectional view corresponding to the cross-sectional view taken along line F13-F13 of FIG. 8 in an open state in which the movable unit is opened with respect to the fixed unit. 15 is a cross-sectional view corresponding to the cross-sectional view taken along the line F13-F13 of FIG. 8 in an open state in which the movable unit is opened with respect to the fixed unit. 16 is a cross-sectional view corresponding to the cross-sectional view taken along line F13-F13 of FIG. 8 in an open state in which the movable unit is opened with respect to the fixed unit. FIG. 17 is a cross-sectional view corresponding to the cross-sectional view taken along line F13-F13 of FIG. 8 in an open state in which the movable unit is opened with respect to the fixed unit. FIG. 18 is a perspective view corresponding to FIG. 3 showing a modification of the electronic device shown in FIG. FIG. 19 is a perspective view showing a rotation lock mechanism. FIG. 20 is a perspective view showing a rotation lock mechanism. FIG. 21 is an enlarged perspective view showing the rotation lock mechanism shown in FIG. 22 is a cross-sectional view taken along line F22-F22 of FIG.

Hereinafter, an embodiment of the technology disclosed in the present application will be described.

(Electronics)
As shown in FIGS. 1, 2, 3, and 4, the electronic device 10 according to the present embodiment includes a movable unit 12, a fixed unit 20, and a hinge unit 50.

In addition, the arrow F shown in each figure shows the front side (front) of the electronic device 10 and the fixed unit 20 in the front-rear direction, and the arrow R shows the rear side (rear) of the electronic device 10 and the fixed unit 20 in the front-rear direction. Show. An arrow U indicates the upper side (upper side) of the electronic device 10 and the fixed unit 20 in the vertical direction. Furthermore, the arrow W indicates the width direction of the electronic device 10 and the fixed unit 20.

(Movable unit)
The movable unit 12 is, for example, a tablet terminal that can be detached from the fixed unit 20 and used. Further, the movable unit 12 can be used like a notebook personal computer by being connected to the rear side of the fixed unit 20 via a hinge unit 50 described later so as to be opened and closed.

As shown in FIG. 1, the movable unit 12 includes a movable housing 14, a display panel 16, and a connection portion 18. The movable housing 14 is formed in a thin box shape. A display panel 16 is accommodated in the movable housing 14. The movable housing 14 houses a printed circuit board on which a CPU and a memory are mounted, an HDD (Hard Disk Drive), a battery, and the like.

The display panel 16 is formed in a rectangular panel shape. The display panel 16 is formed including a touch panel. The front surface of the display panel 16 is a display surface 16A that displays an image for touch operation and the like. Note that the display surface 16 A of the display panel 16 is exposed from a window portion 14 A formed on the front surface of the movable housing 14. A touch panel is formed on the display surface 16 A of the display panel 16.

The connecting portion 18 (see FIG. 1) is provided along one end (lower end) of the movable housing 14. This connection part 18 is connected to the mounting part 52 of the hinge unit 50 mentioned later.

(Fixed unit)
The fixed unit 20 is, for example, an expansion device (input device) that is detachably attached to the movable unit 12. The fixed unit 20 includes a fixed housing 22, a keyboard 24, and a touch pad 26.

The fixed casing 22 is formed in a thin box shape and is installed on the installation surface 28. A keyboard 24 and a touch pad 26 are provided on the upper surface 22A of the fixed housing 22. The keyboard 24 and the touch pad 26 are electrically connected to the movable unit 12 via the hinge unit 50, and transmit an electrical signal to the movable unit 12 when operated by a user.

As shown in FIG. 5, the fixed unit 20 has a pair of extending portions 30. The pair of extending portions 30 extends from both sides in the width direction (arrow W direction) of the fixed unit 20 to the rear side (arrow R direction). The pair of extending portions 30 is supported by the installation surface 28 with at least a front end portion (rear end portion) 30 A in the extending direction (arrow R direction) landed on the installation surface 28 (see FIG. 2).

As shown in FIGS. 6 and 7, the extending part 30 has a main body part 32 and a cover part 34. The main body 32 is formed in a rectangular frame shape when viewed from the vertical direction (thickness direction) of the fixed unit 20. As shown in FIG. 7, the main body portion 32 has a pair of side wall portions 32 A and 32 B that face each other in the width direction of the fixed unit 20.

Of the pair of

side wall portions

32A and 32B, a guide hole 36 is formed in the side wall portion 32B on the center side in the width direction of the fixed unit 20. The guide hole 36 is a long hole extending in the front-rear direction of the fixed unit 20. A slide protrusion 54B of a hinge unit 50 described later is inserted into the guide hole 36. The guide hole 36 is an example of a guide part.

A rack gear 38 is provided between the pair of side wall portions 32 A and 32 B when viewed from the vertical direction of the fixed unit 20. The rack gear 38 extends in the front-rear direction of the fixed unit 20. A plurality of teeth 38 A arranged in the longitudinal direction of the rack gear 38 are formed on the lower surface of the rack gear 38. As shown in FIG. 8, the rack gear 38 is provided in each of the pair of extending portions 30. Each rack gear 38 is meshed with a pinion gear 74 provided at an end of a slide shaft 72 described later.

The pair of extending portions 30 are arranged at intervals in the width direction of the fixed unit 20. Between the pair of extending portions 30, an accommodating portion 40 that accommodates the hinge unit 50 is formed.

(Hinge unit)
As shown in FIG. 5, the hinge unit 50 connects the fixed unit 20 and the movable unit 12 so that the movable unit 12 can be opened and closed with respect to the fixed unit 20. 1, 2, and 3 show a state (open state) in which the movable unit 12 is opened with respect to the fixed unit 20. In this open state, the rotation angle θ1 (see FIG. 17) of the movable unit 12 with respect to the fixed unit 20 becomes an obtuse angle. On the other hand, FIG. 4 shows a state (closed state) in which the movable unit 12 is closed with respect to the fixed unit 20. In the closed state, the upper surface 22A (see FIG. 1) of the fixed unit 20 is covered by the movable unit 12.

The hinge unit 50 includes a mounting portion 52, a hinge main body portion 54, and a pair of rotating shafts 56. The mounting portion 52 and the hinge main body portion 54 are connected via a pair of rotating shafts 56 that extend in the width direction of the fixed unit 20 and are arranged coaxially. The mounting portion 52 is rotated about the pair of rotating shafts 56 in the front-rear direction of the fixed unit 20 with respect to the hinge main body portion 54.

The mounting part 52 is arranged along the width direction of the fixed unit 20. A groove-like connected portion 52 A is provided at the upper end portion of the mounting portion 52. The movable unit 12 is detachably attached to the attachment part 52 in a state where the connection part 18 of the movable unit 12 is connected to the connected part 52A. In this state, when the mounting portion 52 is rotated with respect to the hinge main body portion 54, the movable unit 12 is opened and closed with respect to the fixed unit 20.

A pair of recesses 52 B are formed on both sides in the longitudinal direction at the lower end of the mounting portion 52. A pair of protrusions 54A of a hinge main body 54 described later is inserted into the pair of recesses 52B.

The hinge body 54 is arranged along the width direction of the fixed unit 20. A pair of projecting portions 54 A projecting upward are provided at both longitudinal ends of the hinge main body portion 54. The pair of protrusions 54A are inserted into the pair of recesses 52B of the mounting portion 52 described above.

Rotating shaft 56 passes through projecting portion 54A in the width direction of fixed unit 20. As shown in FIG. 6, the rotation shaft 56 is rotatably supported by a pair of bearing bases 58 provided inside the hinge main body 54. Both end portions of the rotating shaft 56 protrude from the protruding portion 54 A to both sides and are fixed to the mounting portion 52. Thereby, the rotating shaft 56 and the mounting part 52 are rotated integrally. The pair of bearing bases 58 are formed in a plate shape and face the width direction of the fixed unit 20.

Each holding portion 54A houses a holding portion 60 that holds the rotation shaft 56 at a predetermined rotation angle (tilt angle) θ1 (see FIG. 17). The holding unit 60 includes an elastic member (not shown) such as a disc spring that is pressed against the rotating shaft 56. The holding unit 60 holds the rotation shaft 56 at a predetermined rotation angle θ1 by a frictional force generated between the rotation shaft 56 and the elastic member. That is, the rotation angle θ1 of the mounting portion 52 and the movable unit 12 with respect to the hinge main body portion 54 can be adjusted steplessly by the holding portion 60.

As shown in FIG. 7, slide protrusions 54 B are provided at both ends in the width direction of the hinge main body 54. The slide protrusion 54B is formed in an elliptical column shape extending in the front-rear direction of the fixed unit 20. Further, the slide protrusion 54B protrudes from the end of the hinge main body 54 in the width direction toward the outside of the fixed unit 20 in the width direction, that is, toward the extending portion 30. The slide protrusion 54B is fitted into the guide hole 36 formed in the side wall 32B of the extension 30 so as to be slidable in the front-rear direction of the fixed unit 20.

As shown in FIGS. 9 and 10, the hinge body 54 is provided with a slide mechanism 70. The slide mechanism 70 converts the rotational movement of the mounting portion 52 relative to the hinge main body 54 into a linear motion in the front-rear direction of the fixed unit 20, and slides the hinge unit 50 (hinge main body 54) in the front-rear direction of the fixed unit 20. . The slide mechanism 70 includes a slide shaft 72, a pair of pinion gears 74, the pair of rack gears 38, a pair of drive gears 76, and a pair of speed increasing gear mechanisms 80.

The slide shaft 72 extends in the width direction of the fixed unit 20 and is disposed below the pair of rotating shafts 56. The slide shaft 72 is rotatably supported by the pair of bearing bases 58. A pair of pinion gears 74 is provided at both ends of the slide shaft 72.

The pair of pinion gears 74 are formed in a columnar shape and are arranged below the rack gear 38. The pair of pinion gears 74 is disposed coaxially with the slide shaft 72 and is rotated integrally with the slide shaft 72. Furthermore, a plurality of teeth that mesh with the rack gear 38 are formed on the outer peripheral surface of each pinion gear 74. The pair of pinion gears 74 is moved in the front-rear direction of the fixed unit 20 along the rack gear 38 as the slide shaft 72 rotates.

The pair of drive gears 76 are provided on the pair of rotation shafts 56, respectively. Each drive gear 76 is arranged coaxially with the rotation shaft 56 and is rotated integrally with the rotation shaft 56. The pair of drive gears 76 is connected to the slide shaft 72 via a pair of speed increasing gear mechanisms 80. The pair of speed increasing gear mechanisms 80 increase the rotational speed (rotation speed) of the drive gear 76 and transmit it to the slide shaft 72, and rotate the slide shaft 72 and the pair of pinion gears 74 in the same direction as the drive gear 76. Let

Specifically, the speed increasing gear mechanism 80 has a driven gear 82 and a pair of intermediate gears (idle gears) 84A and 84B. The driven gear 82 is provided on the slide shaft 72. The driven gear 82 is disposed coaxially with the slide shaft 72 and is rotated integrally with the slide shaft 72. Further, the driven gear 82 and the drive gear 76 are arranged so as to be shifted in the width direction of the fixed unit 20.

The diameter of the driven gear 82 is smaller than the diameter of the drive gear 76. Further, the number of teeth of the driven gear 82 is smaller than the number of teeth of the drive gear 76. As a result, the gear ratio of the driven gear 82 to the drive gear 76 is reduced, and the rotational speed of the driven gear 82 is increased more than the rotational speed of the drive gear 76.

The drive gear 76 and the driven gear 82 are connected via a pair of

intermediate gears

84A and 84B that adjust the rotational direction of the driven gear 82. The pair of intermediate gears 84 A and 84 B is provided on the intermediate shaft 86. The intermediate shaft 86 extends in the width direction of the fixed unit 20 and is rotatably supported by the pair of bearing bases 58. The pair of intermediate gears 84 A and 84 B is provided coaxially with the intermediate shaft 86 and is rotated integrally with the intermediate shaft 86.

Of the pair of

intermediate gears

84A and 84B, one intermediate gear 84A is engaged with the drive gear 76, and the other intermediate gear 84B is engaged with the driven gear 82. By connecting the drive gear 76 and the driven gear 82 by the pair of

intermediate gears

84A and 84B, the driven gear 82 is rotated in the same direction as the drive gear 76 as the drive gear 76 rotates.

Further, the number of teeth of the intermediate gear 84A is smaller than the number of teeth of the drive gear 76 (the number of teeth of the intermediate gear 84A <the number of teeth of the drive gear 76). As a result, the rotation speed of the intermediate gear 84A is increased more than the rotation speed of the drive gear 76. The number of teeth of the driven gear 82 is smaller than the number of teeth of the intermediate gear 84B (driven gear 82 <intermediate gear 84B). Thereby, the rotational speed of the driven gear 82 is increased more than the rotational speed of the intermediate gear 84B. By connecting the drive gear 76 and the driven gear 82 via the pair of intermediate gears 84 A and 84 B, the rotational speed of the driven gear 82 is further increased than the rotational speed of the drive gear 76.

Next, the operation of this embodiment will be described.

11 and 13 show a closed state in which the movable unit 12 is attached to the attachment portion 52 of the hinge unit 50 and the movable unit 12 is closed with respect to the fixed unit 20. In this state, the rotation shaft 56 is positioned on the tip portions 30 A of the pair of extending portions 30. From this state, for example, when the movable unit 12 is opened rearward (in the direction of arrow R) with respect to the fixed unit 20 by the user, the following occurs.

That is, as shown in FIG. 14, the movable unit 12 is rotated to the rear side of the fixed unit 20 around the pair of rotation shafts 56. As the movable unit 12 is rotated with respect to the fixed unit 20, the slide mechanism 70 is operated, and the pair of rotating shafts 56 are slid to the front side (arrow F direction) of the fixed unit 20.

Specifically, as the movable unit 12 is opened to the rear side with respect to the fixed unit 20, the rotation shaft 56 and the drive gear 76 are rotated in the same direction as the movable unit 12 (arrow a direction). When the drive gear 76 is rotated, the rotation of the drive gear 76 is transmitted to the pinion gear 74 via the speed increasing gear mechanism 80.

More specifically, when the drive gear 76 is rotated, the pair of

intermediate gears

84A and 84B are rotated about the intermediate shaft 86 in the direction opposite to the drive gear 76 (arrow b direction). Further, when the

intermediate gears

84A and 84B are rotated, the driven gear 82 is rotated in the opposite direction (arrow c direction) to the

intermediate gears

84A and 84B. Further, when the driven gear 82 is rotated, the slide shaft 72 and the pinion gear 74 are rotated in the same direction as the drive gear 76, that is, in the same direction as the drive gear 76 (arrow c direction). At this time, the rotation of the drive gear 76 is accelerated and transmitted to the pinion gear 74 according to the gear ratio between the drive gear 76 and the driven gear 82.

Further, when the pinion gear 74 is rotated around the slide shaft 72, the pinion gear 74 moves along the rack gear 38 to the front side of the fixed unit 20. Along with the movement of the pinion gear 74, the slide protrusion 54 B of the hinge main body 54 is slid along the guide hole 36 toward the front side (arrow d direction) of the fixed unit 20. As a result, the rotation shaft 56 is moved to the front side (in the direction of arrow F) of the fixed unit 20 while being guided by the guide hole 36, and is positioned on the front side of the fixed unit 20 relative to the distal end portion 30 A of the extension portion 30.

12 and 15, when the rotation angle θ1 of the movable unit 12 with respect to the fixed unit 20 becomes an obtuse angle larger than 90 °, the center of gravity G1 (see FIG. 17) of the movable unit 12 becomes the rotation axis. It moves to the rear side of the fixed unit 20 rather than 56. In such an open state, the electronic device 10 is used by the user. In the open state, the movable unit 12 is held at a predetermined rotation angle θ 1 with respect to the fixed unit 20 by the frictional force generated in the holding unit 60.

Further, as shown in FIG. 16, when the movable unit 12 is further opened to the rear side with respect to the fixed unit 20 and the slide protrusion 54 B comes into contact with the front end 36 F of the guide hole 36, the movable unit 12 is movable with respect to the fixed unit 20. Opening to the rear side of the unit 12 is restricted.

On the other hand, for example, when the movable unit 12 is closed forward (in the direction of arrow F) with respect to the fixed unit 20 by the user, the following occurs. That is, the movable unit 12 is rotated to the front side of the fixed unit 20 around the pair of rotation shafts 56. As the movable unit 12 pivots forward with respect to the fixed unit 20, the slide mechanism 70 is operated, and the pair of pivot shafts 56 are slid rearward (in the direction of arrow R).

Specifically, the pinion gear 74 moves to the rear side of the fixed unit 20 along the rack gear 38 as the movable unit 12 rotates to the front side with respect to the fixed unit 20. Along with the movement of the pinion gear 74, the slide protrusion 54 B of the hinge main body 54 is slid along the guide hole 36 to the rear side of the fixed unit 20. As a result, the pair of rotating shafts 56 and the movable unit 12 are moved to the rear side of the fixed unit 20 while being guided by the guide holes 36.

11 and 13, when the upper surface 22A of the fixed unit 20 is covered by the movable unit 12, the movable unit 12 is closed with respect to the fixed unit 20. In this closed state, the pinion gear 74 is positioned on the rear end 36R side of the guide hole 36.

Next, the effect of this embodiment will be described.

As described above, according to the present embodiment, the slide mechanism 70 is operated as the movable unit 12 is opened to the rear side with respect to the fixed unit 20, and the rotation shaft 56 is slid to the front side of the fixed unit 20. Accordingly, the center of gravity G1 (see FIG. 17) of the movable unit 12 is moved to the front side of the fixed unit 20. Therefore, compared with the case where the rotating shaft 56 does not slide to the front side of the fixed unit 20 with the opening of the movable unit 12 to the rear side of the fixed unit 20, the rearward fall of the electronic device 10 is suppressed. .

Further, in the present embodiment, the movable unit 12 is a tablet terminal in which an HDD, a battery, and the like are built, and the fixed unit 20 is an expansion device having a keyboard 24, a touch pad 26, and the like. In this case, the mass of the movable unit 12 is likely to be larger than the mass of the fixed unit 20, and the electronic device 10 is likely to fall down with the opening of the movable unit 12 to the rear side of the fixed unit 20. In such a case, the present embodiment is particularly effective.

In this embodiment, the support arm does not protrude rearward from the rear end portion of the fixed unit 20 as in the prior art. Therefore, it is possible to prevent the electronic device 10 from falling to the rear side without increasing the installation space of the fixed unit 20.

Furthermore, in the prior art, when the support arm protrudes rearward from the rear end of the fixed unit, the support arm slides on the installation surface to generate a frictional force between the support arm and the installation surface. To do. This frictional force makes it difficult for the movable unit to rotate with respect to the fixed unit. On the other hand, in this embodiment, the support arm does not protrude rearward from the rear end portion of the fixed unit, and no frictional force is generated as in the prior art. Therefore, the movable unit 12 is rotated with respect to the fixed unit 20. It becomes easy to let.

Moreover, in the prior art, since the support arm protrudes rearward from the fixed unit, it is difficult to ensure the rigidity of the support arm, and the support arm may be damaged. On the other hand, the pair of extending portions 30 of the present embodiment are formed integrally with the fixed-side housing 22 of the fixed unit 20, so that it is easy to ensure rigidity. Therefore, damage to the pair of extending portions 30 is suppressed.

Further, in this embodiment, since the rack gear 38 and the pinion gear 74 are used for the slide mechanism 70, the hinge unit 50 can be accurately slid in the front-rear direction of the fixed unit 20 with a simple structure.

Furthermore, the rotation of the drive gear 76 is accelerated by the speed increasing gear mechanism 80 and transmitted to the pinion gear 74. Thereby, in this embodiment, the sliding amount to the front side of the fixed unit 20 of the rotating shaft 56 accompanying opening | release of the movable unit 12 with respect to the fixed unit 20 becomes large. Therefore, the fall to the rear side of the electronic device 10 is further suppressed.

The slide shaft 72 is slid in the front-rear direction of the fixed unit 20 along a pair of rack gears 38 provided on both sides of the fixed unit 20 in the width direction. As a result, the slide shaft 72 and the rotation shaft 56 are slid accurately in the front-rear direction of the fixed unit 20 with the opening and closing of the movable unit 12 with respect to the fixed unit 20. Therefore, the left and right ends of the hinge unit 50 and the movable unit 12 are prevented from shifting in the front-rear direction of the fixed unit 20 with the opening and closing of the movable unit 12 with respect to the fixed unit 20.

Furthermore, the slide protrusion 54B of the hinge unit 50 is guided in the front-rear direction of the fixed unit 20 by the pair of guide holes 36. Therefore, the hinge unit 50 and the movable unit 12 are further prevented from being tilted with respect to the fixed unit 20 when the movable unit 12 is opened and closed with respect to the fixed unit 20.

Further, the drive gear 76 and the driven gear 82 are arranged so as to be shifted in the width direction of the fixed unit 20 and are connected via a pair of

intermediate gears

84A and 84B. Thereby, the hinge main body 54 can be reduced in size as compared with the case where the drive gear 76 and the driven gear 82 are directly meshed without shifting in the width direction of the fixed unit 20. When the drive gear 76 and the driven gear 82 are not shifted in the width direction of the fixed unit 20, the height of the hinge main body 54 can be increased, or the length of the hinge main body 54 in the front-rear direction can be increased. There is sex.

Here, FIG. 17 shows an open state in which the movable unit 12 is opened rearward with respect to the fixed unit 20, and the center of gravity G1 of the movable unit 12 is located rearward of the pair of rotating shafts 56. In this state, assuming that the moments of the movable unit 12 and the fixed unit 20 around the distal end portion 30A of the extending portion 30 are M1 and M2, respectively, when M1 ≧ M2, the electronic device 10 falls to the rear side (arrow R direction). However, when M1 <M2, the electronic device 10 does not fall backward. Therefore, the moving amount (sliding amount) b1 of the rotating shaft 56 is set so that M1 <M2 in the open state. Thereby, the fall to the rear side of the electronic device 10 is suppressed.

The moments M1 and M2 are obtained from the following equations, respectively.
M1 = m1 × c1 = m1 × (a1 × cos α1-b1) (1)
M2 = m2 × a2 (2)
However,
m1: Mass of the movable unit 12 m2: Mass of the fixed unit 20 a1: Distance from the center of gravity G1 of the movable unit 12 to the rotating shaft 56 a2: Distance from the center of gravity G2 of the fixed unit 20 to the tip 30A of the extension 30 b1: Horizontal distance from the rotation shaft 56 to the tip 30A of the extension 30 c1: Horizontal distance from the center of gravity G1 of the movable unit 12 to the tip 30A of the extension 30 θ1: The movable unit 12 relative to the fixed unit 20 Rotation angle α1: Rotation angle of movable unit 12 with respect to extension 30 (180 ° −θ1)
It is.

Next, a modification of the above embodiment will be described.

18, an intermediate support portion 88 is provided in the pair of extending portions 30 of the fixed unit 20. The intermediate support portion 88 is formed in a plate shape that extends in the width direction of the fixed unit 20, and is disposed below the hinge main body portion 54 of the hinge unit 50. The intermediate support portion 88 is disposed across the pair of extending portions 30 and is supported by the installation surface 28.

In this modification, the movable unit 12 is supported on the installation surface 28 by the pair of extending portions 30 and the intermediate support portion 88 in the opened state in which the movable unit 12 is opened with respect to the fixed unit 20. Therefore, the fall to the rear side of the electronic device 10 due to the opening of the movable unit 12 with respect to the fixed unit 20 is further suppressed.

Further, when the fixing unit 20 is installed on the user's knee, for example, the intermediate support portion 88 is supported on the user's knee. Thereby, the fall to the rear side of the electronic device 10 in the open state is suppressed. That is, in this modification, the electronic device 10 can be installed on a narrow installation surface such as a user's knee.

Next, as shown in FIGS. 19 and 20, the hinge unit 50 may be provided with a rotation lock mechanism 90 that restricts the rotation of the mounting portion 52 relative to the hinge main body portion 54.

Specifically, the rotation lock mechanism 90 has an operation unit 92 operated by a user. The operation unit 92 is slidable on the front surface 52F of the mounting unit 52 of the hinge unit 50 in the axial direction (directions of arrows S1 and S2) of the rotation shaft 56 (see FIG. 5). The operation unit 92 includes a lock member 94. The lock member 94 is formed in a cylindrical shape extending in the axial direction of the rotation shaft 56. The lock member 94 moves in the axial direction of the rotary shaft 56 together with the operation portion 92, and is in a locked state positioned between a pair of edge portions 96A described later and an unlocked state positioned outside the pair of edge portions 96A. It is changed to.

21, an engagement hole 96 is formed on the side surface of the hinge main body portion 54 of the hinge unit 50. As shown in FIG. 22, the engagement hole 96 has a pair of edge portions 96 A that face each other in the rotation direction (arrow K direction) of the movable unit 12. The lock member 94 is inserted into the engagement hole 96 along with the sliding of the rotation shaft 56 of the operation unit 92 in the axial direction in a state where the mounting portion 52 is raised with respect to the hinge main body portion 54.

More specifically, when the rotation angle θ1 (see FIG. 17) of the mounting portion 52 with respect to the hinge main body portion 54 is 90 °, the engagement hole is accompanied by the sliding of the rotation shaft 56 of the operation portion 92 in the axial direction. The lock member 94 is inserted between the pair of edge portions 96 A of 96. Thereby, the lock member 94 will be in a locked state. The pair of edge portions 96A is an example of a pair of engaging portions.

Here, in a locked state in which the lock member 94 is inserted into the engagement hole 96, when the mounting portion 52 with respect to the hinge main body portion 54 is rotated, the lock member 94 rotates the movable unit 12 in the engagement hole 96. It abuts on one edge 96A in the direction. Thereby, the rotation of the mounting portion 52 relative to the hinge main body portion 54 is restricted. In this locked state, the movable unit 12 can be easily attached to and detached from the mounting portion 52.

On the other hand, when the user operates the operation unit 92 after the movable unit 12 is mounted on the mounting unit 52 and the lock member 94 is pulled out of the engagement hole 96 and changed from the locked state to the unlocked state, The mounting portion 52 can rotate with respect to 54. Thereby, the movable unit 12 can be opened and closed with respect to the fixed unit 20.

In this manner, the movable unit 12 can be easily attached to and detached from the mounting portion 52 by restricting the rotation of the mounting portion 52 with respect to the hinge main body portion 54 with the mounting portion 52 standing on the hinge main body portion 54. Become. Therefore, the convenience of the electronic device 10 is improved.

In the modification, the mounting member 52 is provided with the lock member 94 and the hinge main body 54 is provided with the engagement hole 96. However, the modification is not limited thereto. For example, the mounting portion 52 may be provided with an engagement hole, and the hinge main body portion 54 may be provided with a lock member.

In the modification, the pair of edge portions 96A of the engagement hole 96 is a pair of engagement portions, but the modification is not limited thereto. The pair of engaging portions may be, for example, a pair of walls or ribs facing the rotating direction of the movable unit 12.

Further, in the above modification, the lock member 94 is inserted into the engagement hole 96 in a state where the mounting portion 52 is raised with respect to the hinge main body portion 54, but the above modification is not limited thereto. The posture of the mounting portion 52 (the rotation angle θ1 with respect to the hinge main body portion 54) at which the lock member 94 can be inserted into the engagement hole 96 can be changed as appropriate.

Next, in the above embodiment, the drive gear 76 is provided on the rotation shaft 56, but the drive gear 76 may be provided on the mounting portion 52, for example. Furthermore, in the above embodiment, the hinge unit 50 is provided with a pair of rotating shafts 56, but the hinge unit 50 can be provided with at least one rotating shaft.

In the above embodiment, the speed increasing gear mechanism 80 has a pair of

intermediate gears

84A and 84B, but the number and arrangement of the intermediate gears can be changed as appropriate. Moreover, in the said embodiment, although the drive gear 76 and the driven gear 82 are connected via a pair of

intermediate gear

84A, 84B, the number and arrangement | positioning of intermediate gears can be changed.

In the above embodiment, the fixed unit 20 is provided with a pair of rack gears 38, but the fixed unit 20 can be provided with at least one rack gear 38.

In the above embodiment, a gear mechanism is used as a slide mechanism that slides the rotation shaft 56 in the front-rear direction of the fixed unit 20 as the movable unit 12 rotates relative to the fixed unit 20. However, for example, a link mechanism may be used as the slide mechanism.

Moreover, in the said embodiment, although the hinge main-body part 54 of the hinge unit 50 is connected with a pair of extension part 30, the said embodiment is not restricted to this. The hinge main body 54 of the hinge unit 50 can be connected to the rear side of the fixed unit 20.

Moreover, in the said embodiment, although the movable unit 12 is attached or detached with respect to the hinge unit 50, the said embodiment is not restricted to this. For example, the movable unit 12 may be formed integrally with the hinge unit. That is, the above embodiment may be applied to an electronic device in which a movable unit is detachably connected to a fixed unit, such as a notebook personal computer.

Furthermore, the above embodiment can be applied to electronic devices such as a mobile phone, a HDD built-in television, a DVD player, a portable game machine, and an electronic dictionary that include a fixed unit and a movable unit that opens and closes with respect to the fixed unit.

As mentioned above, although one Embodiment of the technique which this application discloses was described, the technique which this application discloses is not limited to said embodiment. In addition, the above embodiment and various modifications may be used in appropriate combination, and it is needless to say that various embodiments can be implemented without departing from the gist of the technology disclosed in the present application.

Claims

A fixed unit;
A movable unit that is connected to the rear side of the fixed unit via a rotation shaft, and that opens and closes with respect to the fixed unit with rotation about the rotation shaft;
A slide mechanism that slides the pivot shaft to the front side of the fixed unit as the movable unit is opened relative to the fixed unit;
Electronic equipment comprising.
A hinge unit having the pivot shaft and connecting the rear side of the fixed unit and the movable unit;
A guide portion that is provided on the rear side of the fixed unit, extends in the front-rear direction of the fixed unit, and guides the hinge unit to the front side of the fixed unit when the movable unit is opened with respect to the fixed unit;
An electronic apparatus according to claim 1.
The slide mechanism is
A rack gear provided on the rear side of the fixed unit and extending in the front-rear direction of the fixed unit;
The hinge unit is provided in the hinge unit, meshed with the rack gear, rotated with the opening of the movable unit with respect to the fixed unit, and moved to the front side of the fixed unit along the rack gear, thereby moving the hinge unit to the front side. A pinion gear that slides to the front of the fixed unit;
Having
The electronic device according to claim 2.
On the rear side of the fixed unit, it has a pair of extending portions extending from both sides in the width direction of the fixed unit to the rear side,
The hinge unit is disposed between the pair of extending portions and is slid to the front side of the fixed unit between the pair of extending portions as the movable unit is opened with respect to the fixed unit.
The electronic device according to claim 3.
The guide portions are provided in the pair of extending portions, respectively.
The electronic device according to claim 4.
The pair of extending portions, at least the tip portion in the extending direction is supported by the installation surface,
The electronic device according to claim 4 or 5.
The rotating shaft is slid to the front side of the fixed unit with the opening of the movable unit with respect to the fixed unit, and is positioned on the front side of the fixed unit with respect to the distal ends of the pair of extending portions.
The electronic device according to claim 6.
The fixed unit is provided over the pair of extending portions and provided with an intermediate support portion supported by an installation surface.
The electronic device according to any one of claims 4 to 7.
The slide mechanism has a slide shaft that is provided in the hinge unit, extends in the width direction of the fixed unit, and rotates with the opening of the movable unit with respect to the fixed unit,
A plurality of the rack gears are provided on the rear side of the fixed unit at intervals in the width direction of the fixed unit,
A plurality of the pinion gears are provided on the slide shaft and meshed with the plurality of rack gears, respectively.
The electronic device according to any one of claims 3 to 8.
The slide mechanism is
A drive gear that rotates integrally with the movable unit as the movable unit is opened relative to the fixed unit;
A speed-up gear mechanism that speeds up the rotation of the drive gear and transmits it to the pinion gear, and rotates the pinion gear in the same direction as the drive gear;
Having
The electronic device according to any one of claims 3 to 9.
The rotating shaft is rotated integrally with the movable unit as the movable unit is opened with respect to the fixed unit.
The drive gear is provided on the rotating shaft.
The electronic device according to claim 10.
The hinge unit is
A hinge body connected to the fixed unit;
A mounting portion connected to the hinge main body portion via the pivot shaft, to which the movable unit is attached;
Having
The electronic device according to any one of claims 3 to 11.
The movable unit is attached to and detached from the mounting portion.
The electronic device according to claim 12.
The hinge unit has a rotation lock mechanism that restricts rotation of the mounting portion with respect to the hinge body.
The electronic device according to claim 12 or claim 13.
The rotation lock mechanism regulates the rotation of the mounting portion relative to the hinge main body portion in a state where the mounting portion is raised with respect to the hinge main body portion.
The electronic device according to claim 14.
The rotation lock mechanism is
A pair of engaging portions provided on one of the hinge main body portion and the mounting portion and opposed to the rotating direction of the movable unit;
Provided on the other of the hinge main body and the mounting portion, and positioned between the pair of engaging portions as the pivot shaft moves in the axial direction, and on the outside of the pair of engaging portions. A locking member that is transferred to an unlocked state,
Having
The electronic device according to claim 14 or 15.
The hinge unit has a holding portion that holds the movable unit at a predetermined rotation angle with respect to the fixed unit.
The electronic device according to any one of claims 3 to 16.
The slide mechanism slides the rotation shaft to the front side of the fixed unit as the movable unit rotates to the rear side with respect to the fixed unit, and allows the movable unit to rotate to the front side of the fixed unit. With this, the rotating shaft is slid to the rear side of the fixed unit
The electronic device according to any one of claims 1 to 17.
The fixing unit has a keyboard,
The movable unit is a tablet terminal having a touch panel.
The electronic device according to any one of claims 1 to 18.
A fixed unit;
A hinge main body connected to the rear side of the fixed unit, and connected to the hinge main body via a rotating shaft, a movable unit is attached, and the fixing is performed with rotation about the rotating shaft. A hinge unit having a mounting part for opening and closing the movable unit with respect to the unit;
A slide mechanism that slides the hinge main body to the front side of the fixed unit as the movable unit is opened relative to the fixed unit;
An expansion device comprising: