Portable information device

The present invention relates to a portable information device including a foldable display disposed at the inner sides of a pair of foldable chassis members.

In recent years, portable information devices including touch-panel liquid crystal displays and no physical keyboards, such as tablet PCs and smartphones, have been rapidly widespread. Displays of portable information devices of this type are preferably large in use, but are preferably small size when being carried. In view of this, in a proposed portable information device, a display as well as a chassis is made foldable by using a flexible display such as an organic electro luminescence (EL) display (see, for example, Patent Document 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 2014-216025

A flexible display as described above is very thin and is weak to an impact or the like. Thus, the flexible display needs to be stably supported on the inner surface of a chassis member that is movable to be folded in two. To achieve this configuration, it may be possible to provide a support member for supporting the flexible display on the inner surface of the chassis member, for example. This support member, however, needs to be also movable to be folded in two, and when a step or the like occurs in the folded portion, the display is curved so that production failures might occur.

The present invention has been made in view of problems in the conventional technique described above, and an object of an aspect of the present invention is to provide a portable information device in which a foldable display can be stably supported.

A portable information device according to an aspect of the present disclosure includes: a first chassis member and a second chassis member, an edge of the first chassis member and an edge of the second chassis adjacent to the edge of the first chassis member being coupled to each other by a hinge mechanism so that the first chassis member and the second chassis member are foldable in two; a display that is disposed at inner surfaces of both the first chassis member and the second chassis member and that is foldable in two; a first support plate disposed at the inner surface of the first chassis member and supporting a back surface of the display from a side of the first chassis member; a second support plate disposed at the inner surface of the second chassis member and supporting the back surface of the display from a side of the second chassis member; a first support base attached to the inner surface of the first chassis member and having a front surface supporting the first support plate; a second support base attached to the inner surface of the second chassis member and having a front surface supporting the second support plate; and an adjustment mechanism provided on at least one of the first support base or the second support base and configured to adjust at least one of an attachment position of the first support base relative to the inner surface of the first chassis member or an attachment position of the second support base relative to the inner surface of the second chassis member so as to make the front surface of the first support base and the front surface of the second support base flush with each other.

In the portable information device, the hinge mechanism may include a first hinge chassis fixed to the inner surface of the first chassis member, a second hinge chassis fixed to the inner surface of the second chassis member, and a hinge shaft rotatably coupling the first hinge chassis and the second hinge chassis to each other, the first hinge chassis may be the first support base, and the second hinge chassis may be the second support base, and the adjustment mechanism may be interposed at least one of between a back surface of the first hinge chassis and the inner surface of the first chassis member or between a back surface of the second hinge chassis and the inner surface of the second chassis member, and may be adjustment screws configured to adjust at least one of a positional relationship between the back surface of the first hinge chassis and the inner surface of the first chassis member or a positional relationship between the back surface of the second hinge chassis and the inner surface of the second chassis member.

In the portable information device, a plurality of sets of the adjustment screws may be provided on at least one of the first support base or the second support base.

In the portable information device, an end surface of the first support plate and an end surface of the second support plate opposed to the end surface of the first support plate may be in contact with each other in a state in which the first chassis member and the second chassis member are opened in a flat plate shape.

In the portable information device, the hinge mechanism may include a first hinge chassis fixed to the inner surface of the first chassis member, a second hinge chassis fixed to the inner surface of the second chassis member, and a hinge shaft rotatably coupling the first hinge chassis and the second hinge chassis to each other, the first hinge chassis may be the first support base, and the second hinge chassis may be the second support base.

In the portable information device, the hinge mechanism may be disposed at each of longitudinal ends of the edges of the first chassis member and the second chassis member.

According to the above-described aspect of the present disclosure, a portable information device in which a foldable display can be stably supported can be obtained.

FIG. 1 is a perspective view illustrating a state in which a portable information device according to the present disclosure is closed in an accommodated state.

FIG. 2 is a perspective view schematically illustrating a state in which the portable information device illustrated in FIG. 1 is opened in a use state.

FIG. 3 is a plan view schematically illustrating an internal structure of the portable information device illustrated in FIG. 2 .

FIG. 4 is a plan view illustrating a state in which a first support plate and a second support plate are attached to the portable information device illustrated in FIG. 3 .

FIG. 5 is an enlarged plan view illustrating one of hinge mechanisms illustrated in FIG. 4 and its peripheral portion.

FIG. 6A is a schematic cross-sectional view taken along line VI-VI in FIG. 5 .

FIG. 6B is a schematic cross-sectional view illustrating an adjustment operation performed by an adjustment mechanism to place a hinge chassis in the attached state illustrated in FIG. 6A .

FIG. 7A is a side view schematically illustrating a display and a positional relationship between support plates and hinge mechanisms in a state in which a pair of chassis members are open.

FIG. 7B is a side view illustrating a state in which the pair of chassis members are closed to be folded in two from the state illustrated in FIG. 7A .

A preferred embodiment of a portable information device according to the present invention will be specifically described with reference to the attached drawings.

1. Overall Configuration of Portable Information Device

FIG. 1 is a perspective view illustrating a state in which a portable information device 10 according to the present disclosure is closed in an accommodated state. FIG. 2 is a perspective view schematically illustrating a state in which the portable information device 10 illustrated in FIG. 1 is opened in a use state. FIG. 3 is a plan view schematically illustrating an internal structure of the portable information device 10 illustrated in FIG. 2 .

As illustrated in FIGS. 1 and 2 , the portable information device 10 includes a first chassis member 12 A, a second chassis member 12 B, a spine member 14 , and a display 16 . In this disclosure, as the portable information device 10 , a tablet PC that is foldable in two like a book is used as an example. The portable information device 10 may be a cellular phone, a smartphone, or an electronic organizer.

Each of the chassis members 12 A and 12 B is a rectangular plate member in which side walls stand on three sides except a side corresponding to the spine member 14 . Each of the chassis members 12 A and 12 B is made of, for example, a metal plate of, for example, stainless, magnesium, or aluminium or a fiber-reinforced resin plate including reinforcing fibers such as carbon fibers. The display 16 is fixed to the inner surfaces of the chassis members 12 A and 12 B through the first support plate 18 A and the second support plate 18 B. The chassis members 12 A and 12 B are coupled to each other through a pair of hinge mechanisms 19 and 19 provided at both ends of the spine member 14 . The hinge mechanisms 19 couple the chassis members 12 A and 12 B so that the chassis members 12 A and 12 B are foldable to be in an accommodated state illustrated in FIG. 1 or a use state illustrated in FIG. 2 . A line C represented as an alternate long and short dash line in FIG. 3 indicates a folding center C of a folding operation of the chassis members 12 A and 12 B.

In the chassis members 12 A and 12 B, inner end surfaces 12 Aa and 12 Ba facing the spine member 14 are disposed at the hinge side, and outer end surfaces 12 Ab and 12 Bb opposite to the spine member 14 are disposed at the open end side.

As illustrated in FIGS. 1 through 3 , in the portable information device 10 , directions from the center spine member 14 to the outer end surfaces 12 Ab and 12 Bb will be hereinafter referred to as X directions, and directions along the longitudinal direction of the spine member 14 will be hereinafter referred to as Y directions. The X directions will also be referred to as an X 1 direction that is a direction from the spine member 14 to the outer end surface 12 Ab or an X 2 direction that is a direction from the spine member 14 to the other outer end surface 12 Bb. Similarly, the Y directions will also be referred to as a Y 1 direction that is a direction along the longitudinal direction of the spine member 14 and extending to one end (upward in FIG. 3 ) or a Y 2 direction that is a direction toward the other end (downward in FIG. 3 ).

As illustrated in FIG. 3 , a main board 20 , a communication module 21 , and a cooling fan 22 , for example, are attached and fixed to the inner surface 12 Ac of the first chassis member 12 A with unillustrated screws or the like. A sub-board 24 , an antenna 25 , and a battery device 26 , for example, are attached and fixed to the inner surface 12 Bc of the second chassis member 12 B with unillustrated screws or the like. The main board 20 is a printed wiring board for controlling the entire portable information device 10 , and various electronic components such as an unillustrated central processing unit (CPU) and a memory are mounted on the main board 20 . The communication module 21 is a device that performs information processing of various wireless communications such as a wireless local area network (LAN) that receives and transmits signals with the antenna 25 . The cooling fan 22 is a fan for cooling heat generated by the CPU and other components mounted on the main board 20 . The sub-board 24 is a printed wiring board that functions as a controller for controlling a display operation of the display 16 . The battery device 26 is a power supply for the portable information device 10 , and can be charged from an external power supply through an unillustrated power supply cable.

The display 16 is a touch panel liquid crystal display, for example. The display 16 has a foldable structure, that is, the display 16 can be folded when the chassis members 12 A and 12 B are folded. The display 16 is a flexible display having a flexible paper structure, such as an organic EL, and opens or closes with an opening/closing operation of the chassis members 12 A and 12 B.

FIG. 4 is a plan view illustrating a state in which the first support plate 18 A and the second support plate 18 B are attached to the portable information device 10 illustrated in FIG. 3 .

As illustrated in FIG. 4 , the display 16 is attached and fixed to the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B with the support plates 18 A and 18 B interposed therebetween. The back surface of a display surface (front surface) of the display 16 is bonded and fixed to the surfaces of the support plates 18 A and 18 B with an adhesive or a double face tape. In the case of the present disclosure, the support plates 18 A and 18 B are respectively disposed at the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B and can be folded with respect to the folding center C.

Each of the support plates 18 A and 18 B is made of a metal plate of, for example, stainless, magnesium, or aluminium or a fiber-reinforced resin plate obtained by impregnating reinforcing fibers such as carbon fibers in a matrix resin of a thermosetting resin or a thermoplastic resin. In the present disclosure, a carbon fiber-reinforced resin plate using carbon fibers as a reinforcing resin is used. To each of the support plates 18 A and 18 B, an unillustrated flexible sheet is fixed to the entire surface to which the display 16 is bonded, for example. The display 16 is adhered to the surface of the flexible sheet with an adhesive or the like. The support plates 18 A and 18 B are coupled to each other with the flexible sheet interposed therebetween so that the support plates 18 A and 18 B are foldable. A portion of the flexible sheet covering adjacent ends of the support plates 18 A and 18 B serves as a bending portion (flexible hinge) of the support plates 18 A and 18 B.

Adjacent inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B are in contact with each other in a use state in which the chassis members 12 A and 12 B are opened in a flat plate shape (see FIG. 7A ). The inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B are separated from each other in an accommodated state in which the chassis members 12 A and 12 B are folded in two (see FIG. 7B ). As illustrated in FIG. 7B , a portion of the display 16 extending across the inner end surfaces 18 Aa and 18 Ba in the X directions is not fixed to the support plates 18 A and 18 B.

As illustrated in FIG. 2 , a bezel member 27 is disposed on an outer peripheral portion of the surface of the display 16 with the bezel member 27 being attached and fixed to the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B with the support plates 18 A and 18 B sandwiched therebetween. The bezel member 27 is disposed to cover a non-display region (inactive region) R 2 of the outer peripheral portion except a display region (active region) R 1 of the surface of the display 16 .

As illustrated in FIG. 1 , in the accommodated state of the portable information device 10 , the inner end surfaces 12 Aa and 12 Ba of the chassis members 12 A and 12 B are greatly separated from each other to create a gap. Thus, the portable information device 10 includes the spine member 14 to cover the gap so that it is possible to prevent exposure of internal components such as the display 16 , the main board 20 , and the battery device 26 from the gap.

The spine member 14 serves as a spine of the portable information device 10 when the portable information device 10 is folded. The spine member 14 is a flexible thin plate member. The spine member 14 is disposed across the interface between the chassis members 12 A and 12 B to cover the inner surfaces of the chassis members 12 A and 12 B across the inner end surfaces 12 Aa and 12 Ba (see FIG. 3 ). In the case of the present disclosure, the spine member 14 has a configuration in which a plurality of narrow plate members are arranged in the X directions and are coupled together with a flexible sheet.

An end of the spine member 14 towards the first chassis member 12 A is slidable in the X directions on the inner surface 12 Ac of the first chassis member 12 A and is always biased in the X 1 direction by a tension spring 14 a (see FIG. 3 ). An end of the spine member 14 towards the second chassis member 12 B is fixed to the inner surface 12 Bc of the second chassis member 12 B. In this manner, when the chassis members 12 A and 12 B are in the accommodated state, the spine member 14 is folded in two, whereas when the chassis members 12 A and 12 B are in the use state, the spine member 14 is opened in a flat plate shape.

In this manner, in the portable information device 10 , the display 16 at the pair of inner sides of the chassis members 12 A and 12 B can be opened or closed by opening or closing the chassis members 12 A and 12 B through the pair of support plates 18 A and 18 B.

2. Hinge Mechanism

An example configuration of the hinge mechanisms 19 coupling the chassis members 12 A and 12 B to each other will be described.

As illustrated in FIGS. 3 and 4 , the hinge mechanisms 19 are disposed to overlap the longitudinal ends of the spine member 14 . The hinge mechanisms 19 are disposed outside the outer periphery of the display 16 and are in line symmetry with respect to the center in the Y directions. Each of the hinge mechanisms 19 includes a first hinge chassis (first support base) 28 A, a second hinge chassis (second support base) 28 B, a first arm 30 , and a second arm 31 .

The first hinge chassis 28 A is a thin block-shaped part made of, for example, a resin or a metal. The first hinge chassis 28 A is fixed to the inner surface 12 Ac of the first chassis member 12 A with fixing screws 32 . The second hinge chassis 28 B is a thin block-shaped part made of, for example, a resin or a metal. The second hinge chassis 28 B is fixed to the inner surface 12 Bc of the second chassis member 12 B with fixing screws 32 .

The first hinge chassis 28 A has a recess 34 in the back surface that contacts the inner surface 12 Ac of the first chassis member 12 A (see FIG. 3 ). The recess 34 has a recessed shape having an opening extending from the inner side surface of the first hinge chassis 28 A (side surface facing in the direction Y 2 in the upper hinge mechanism 19 in FIG. 3 ) to the side surface facing the folding center C (side surface facing in the direction X 2 ). The second hinge chassis 28 B has a recess 35 in the back surface that contacts the inner surface 12 Bc of the second chassis member 12 B. The recess 35 has a recessed shape having an opening extending from the inner side surface of the second hinge chassis 28 B (side surface facing in the direction Y 2 in the upper hinge mechanism 19 in FIG. 3 ) to the side surface facing the folding center C (side surface facing in the direction X 1 ). The recesses 34 and 35 communicate with each other with the folding center C sandwiched therebetween. The recesses 34 and 35 accommodate and support the ends of the spine member 14 in the Y directions so that the spine member 14 is slidable in the X directions. In this manner, it is possible to prevent both ends of the spine member 14 from rising in the folding operation.

An end of the first arm 30 is rotatably coupled to the first hinge chassis 28 A through a first hinge shaft 36 a , and the other end of the first arm 30 is rotatably coupled to the second hinge chassis 28 B through a second hinge shaft 36 b (see FIGS. 7A and 7B ). An end of the second arm 31 is rotatably coupled to the first hinge chassis 28 A through a third hinge shaft 36 c , and the other end of the second arm 31 is rotatably coupled to the second hinge chassis 28 B through a fourth hinge shaft 36 d (see FIGS. 7A and 7B ). The first arm 30 and the second arm 31 are arranged in parallel in the Y directions. The second hinge shaft 36 b of the first arm 30 is sandwiched between the third hinge shaft 36 c and the fourth hinge shaft 36 d of the second arm 31 . The third hinge shaft 36 c of the second arm 31 is sandwiched between the first hinge shaft 36 a and the second hinge shaft 36 b of the first arm 30 . In this manner, the first arm 30 and the second arm 31 are displaced from each other in each of the X directions and the Y directions.

When the chassis members 12 A and 12 B are folded with respect to the folding center C, the arms 30 and 31 of each of the hinge mechanisms 19 rotate through the hinge shafts 36 a through 36 d (see FIG. 7B ). In this manner, the hinge mechanisms 19 couple the chassis members 12 A and 12 B to each other so that the chassis members 12 A and 12 B can rotate from the two-folded state to the open state in a flat plate shape.

3. Attachment Structure of Support Plate

FIG. 5 is an enlarged plan view illustrating one of the hinge mechanisms 19 illustrated in FIG. 4 and its peripheral portion.

As illustrated in FIGS. 4 and 5 , the support plates 18 A and 18 B are attached and fixed to the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B through a plurality of attachment tabs 40 and 42 projecting from the outer peripheries thereof.

The attachment tabs 40 are disposed to overlap the hinge mechanism 19 near the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B. The attachment tabs 40 are projecting tabs that project outward from the outer peripheral end surfaces of the support plates 18 A and 18 B. The first support plate 18 A includes the attachment tabs 40 at positions slightly offset in the X 1 direction from the ends of the inner end surface 18 Aa in the Y directions, that is, at positions overlapping the first hinge chassis 28 A. The second support plate 18 B includes the attachment tabs 40 at positions slightly offset in the X 2 direction from the ends of the inner end surface 18 Ba in the Y directions, that is, at positions overlapping the second hinge chassis 28 B.

The attachment tabs 42 are projecting tabs that project outward from the outer peripheral end surfaces of the support plates 18 A and 18 B. The plurality of attachment tabs 42 are disposed at appropriate positions on outer peripheral portions of the support plates 18 A and 18 B.

A through hole for screwing is formed at the center of each of the attachment tabs 40 and 42 . The support plates 18 A and 18 B are fastened to the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B with attachment screws 44 through the through holes of the attachment tabs 40 and 42 . The attachment tabs 40 are fastened to the hinge chassis 28 A and 28 B with the attachment screws 44 while being in contact with surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B. The inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B may have bosses provided with internal screws for screwing the attachment screws 44 . Although FIG. 4 illustrates an example of a configuration in which the attachment tabs 40 have arc-shaped tips and the attachment tabs 42 have rectangular shapes similar to those of the attachment tabs 40 , the shapes of the attachment tabs 40 and 42 may be changed as appropriate.

The support plates 18 A and 18 B are formed as separate members so that the support plates 18 A and 18 B can be folded in two in accordance with an opening/closing operation of the chassis members 12 A and 12 B. Thus, in a case where a step in the thickness direction were formed between the support plates 18 A and 18 B, this step would affect the display 16 disposed on the surfaces of the support plates 18 A and 18 B. Consequently, the display 16 might be curved or waved in the use state, resulting in production failures such as failures in visual recognition and in display. If the display 16 were curved, for example, the display 16 might fail to move along an opening/closing trajectory defined in design during an opening/closing operation between the use state and the accommodated state. In such a case, the display 16 would be subjected to an excessive load especially in the bending portion or its periphery to be damaged or cause failures.

Each of the support plates 18 A and 18 B is a plate having a surface area to some degree. Thus, the influence on the display 16 due to formation of a step between the support plates 18 A and 18 B is mainly caused by a step in a joint portion occurring when the support plates 18 A and 18 B are brought into contact with each other in the use state of the portable information device 10 to form one plate, that is, caused by a step occurring between the inner end surfaces 18 Aa and 18 Ba. In other words, failures in the display 16 can be sufficiently avoided by suppressing occurrence of a step between the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B.

In view of this, the portable information device 10 includes an adjustment mechanism 50 for suppressing occurrence of a step in the thickness direction between the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B.

4. Adjustment Mechanism

FIG. 6A is a schematic cross-sectional view taken along line VI-VI in FIG. 5 . FIG. 6B is a schematic cross-sectional view illustrating an adjustment operation performed by the adjustment mechanism 50 to place the hinge chassis 28 A and 28 B in the attached state illustrated in FIG. 6A .

First, a configuration of the adjustment mechanism 50 will be described.

As illustrated in FIGS. 5 and 6A , the attachment tabs 40 of the support plates 18 A and 18 B are brought into contact with and fixed to the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B. The adjustment mechanism 50 is a mechanism that adjusts an attachment position of one of the hinge chassis, that is, the first hinge chassis 28 A, to the chassis member 12 A so that the surfaces 28 Aa of the first hinge chassis 28 A can be made flush with the surface 28 Ba of the other second hinge chassis 28 B and, thereby, occurrence of a step between the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B can be suppressed.

The adjustment mechanism 50 includes two adjustment screws 50 a and 50 b provided on the first hinge chassis 28 A. The first hinge chassis 28 A includes a pair of internal screw holes 52 and 52 into which the adjustment screws 50 a and 50 b are screwed. Each of the internal screw holes 52 penetrates the hinge chassis 28 A in the thickness direction. In the case of the present disclosure, the internal screw holes 52 are disposed at positions displaced from attachment holes of the fixing screws 32 in such a manner the screw holes and the attachment holes are alternately arranged. That is, one adjustment screw 50 a is disposed at the X 1 side of one of the fixing screws 32 at the Y 1 side, and the other adjustment screw 50 b is disposed at the X 2 side of the other fixing screw 32 at the Y 2 side. The adjustment screws 50 a and 50 b are disposed across the center of the width of the hinge chassis 28 A in the Y directions.

Next, a method for avoiding occurrence of a step between the support plates 18 A and 18 B by using the adjustment mechanism 50 will be described.

As illustrated in FIG. 6B , first, the second hinge chassis 28 B not including the adjustment mechanism 50 is fixed onto the inner surface 12 Bc of the second chassis member 12 B with the fixing screws 32 . That is, the second hinge chassis 28 B is fixed with a back surface 28 Bb opposite to a front surface 28 Ba being in contact with the inner surface 12 Bc. Next, the first hinge chassis 28 A including the adjustment mechanism 50 is placed on the inner surface 12 Ac of the first chassis member 12 A. The hinge chassis 28 A and 28 B are rotatably coupled to each other through the arms 30 and 31 .

Thereafter, the adjustment mechanism 50 is caused to operate to perform adjustment in such a manner that the front surface 28 Aa of the first hinge chassis 28 A is flush with the front surface 28 Ba of the second hinge chassis 28 B.

First, the adjustment screws 50 a and 50 b are screwed into the internal screw holes 52 from the front surface 28 Aa of the first hinge chassis 28 A. The adjustment screws 50 a and 50 b are operated with, for example, a tool such as a driver. Then, the tips of the adjustment screws 50 a and 50 b project from the back surface 28 Ab of the first hinge chassis 28 A to contact the inner surface 12 Ac of the first chassis member 12 A.

At this time, the adjustment mechanism 50 adjusts the length of projection of the adjustment screws 50 a and 50 b from the back surface 28 Ab so that the attachment position, including an attachment angle and an attachment height, of the first hinge chassis 28 A to the inner surface 12 Ac can be adjusted. This adjustment is performed with reference to the front surface 28 Ba of the second hinge chassis 28 B previously fixed to the second chassis member 12 B, for example, so that the front surface 28 Aa of the first hinge chassis 28 A is made flush with this front surface 28 Ba. Examples of a method for making the surfaces 28 Aa and 28 Ba flush with each other include a method of adjusting the adjustment screws 50 a and 50 b while measuring the surfaces 28 Aa and 28 Ba with a measuring instrument such as a laser displacement sensor and a method of adjusting the adjustment screws 50 a and 50 b using, for example, a plate placed across the surfaces 28 Aa and 28 Ba as a reference.

Such an adjustment operation by the adjustment mechanism 50 enables the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B of each of the pair of hinge mechanisms 19 and 19 to be flush with each other. Then, the first hinge chassis 28 A is fixed onto the inner surface 12 Ac of the first chassis member 12 A with the fixing screws 32 . Subsequently, the attachment tabs 40 of the support plates 18 A and 18 B are brought into contact with the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B and fastened thereto with the attachment screws 44 . The other attachment tabs 42 of the support plates 18 A and 18 B are also screwed to the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B with the attachment screws 44 . In this manner, at least portions of the support plates 18 A and 18 B near the inner end surfaces 18 Aa and 18 Ba are fixed onto the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B that are flush with each other. As a result, the inner end surfaces 18 Aa and 18 Ba can be made flush with each other without occurrence of a step there between.

The adjustment mechanism 50 may be provided on the second hinge chassis 28 B or may be provided on each of the hinge chassis 28 A and 28 B. For example, in the case where the adjustment mechanism 50 is provided on each of the hinge chassis 28 A and 28 B, the surfaces 28 Aa and 28 Ba are adjusted to be flush with each other, and then, the hinge chassis 28 A and 28 B are fastened to the chassis members 12 A and 12 B with the fixing screws 32 .

5. Advantages of Portable Information Device

As described above, the portable information device 10 according to an aspect of the present disclosure includes: the first chassis member 12 A and the second chassis member 12 B, the inner end surfaces 12 Aa and 12 Ba, which are adjacent edges, of the first chassis member 12 A and the second chassis member 12 B being coupled to each other by the hinge mechanism 19 so that the first chassis member 12 A and the second chassis member 12 B are foldable in two; and the display 16 that is disposed at the inner surfaces 12 Ac and 12 Bc of both the first chassis member 12 A and the second chassis member 12 B and that is foldable in two. The portable information device 10 includes the first support plate 18 A, the second support plate 18 B, the first hinge chassis 28 A serving as a first support base, the second hinge chassis 28 B serving as a second support base, and the adjustment mechanism 50 . The first support plate 18 A is disposed at the inner surface 12 Ac of the first chassis member 12 A and supports the back surface of the display 16 from a side of the first chassis member 12 A. The second support plate 18 B is disposed at the inner surface 12 Bc of the second chassis member 12 B and supports the back surface of the display 16 from a side of the second chassis member 12 B. The first hinge chassis 28 A is attached to the inner surface 12 Ac of the first chassis member 12 A and has the front surface 28 Aa supporting the first support plate 18 A. The second hinge chassis 28 B is attached to the inner surface 12 Bc of the second chassis member 12 B and has the front surface 28 Ba supporting the second support plate 18 B. The adjustment mechanism 50 is provided on least one of the first hinge chassis 28 A or the second hinge chassis 28 B and is configured to adjust at least one of an attachment position of the first hinge chassis 28 A to the inner surface 12 Ac of the first chassis member 12 A or an attachment position of the second hinge chassis 28 B to the inner surface 12 Bc of the second chassis member 12 B so as to make the front surface 28 Aa of the first hinge chassis 28 A and the front surface 28 Ba of the second hinge chassis 28 B flush with each other.

Accordingly, in the portable information device 10 , the support plates 18 A and 18 B can be fixed onto the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B with the surfaces 28 Aa and 28 Ba being made flush with each other by using the adjustment mechanism 50 . Thus, occurrence of a step between the support plates 18 A and 18 B can be suppressed. As a result, in the portable information device 10 , the display 16 can be stably supported by the support plates 18 A and 18 B with occurrence of a step being suppressed so that failures such as curving of the display 16 can be prevented.

In the portable information device 10 , the inner end surfaces 18 Aa and 18 Ba as opposed end surface of the support plates 18 A and 18 B are in contact with each other in the use state in which the chassis members 12 A and 12 B are opened in a flat plate shape. Thus, in the portable information device 10 , the display 16 in the open state can be stably supported by the support plates 18 A and 18 B whose back surfaces configured in the shape of one plate. In addition, since a gap is not formed between the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B in the use state of the portable information device 10 , rigidity in supporting the display 16 in, for example, a touch operation can be obtained.

In the portable information device 10 , the support plates 18 A and 18 B are supported by the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B. Thus, in the portable information device 10 , the support plates 18 A and 18 B supporting the display 16 can be supported by the hinge mechanisms 19 that perform an opening/closing operation of the chassis members 12 A and 12 B. In this manner, as illustrated in FIGS. 7A and 7B , in the portable information device 10 , the display 16 is folded to form an arc with a predetermined curvature defined in design using the hinge mechanisms 19 . That is, the display 16 can be smoothly folded in two in accordance with a rotation operation of the hinge mechanisms 19 . As a result, the portable information device 10 can reduce rising of the display 16 or failures caused by an excessive load on the display 16 applied when the chassis members 12 A and 12 B is opened or closed. As indicated by the chain double-dashed line in FIGS. 7A and 7B , in the case of the present disclosure, the surface of the display 16 is configured to match the axial center of the hinge shafts 36 a through 36 d . In FIGS. 7A and 7B , the adjustment mechanism 50 and the fixing screws 32 are not shown.

In the portable information device 10 , the adjustment mechanism 50 is constituted by the adjustment screws 50 a and 50 b that is disposed at least one of between the back surface 28 Ab of the first hinge chassis 28 A and the inner surface 12 Ac of the first chassis member 12 A or between the back surface 28 Bb of the second hinge chassis 28 B and the inner surface 12 Bc of the second chassis member 12 B and is configured to adjust at least one of a positional relationship between the back surface 28 Ab and the inner surface 12 Ac or a positional relationship between the back surface 28 Bb and the inner surface 12 Bc. In this manner, the adjustment mechanism 50 can adjust the surfaces 28 Aa and 28 Ba of the hinge chassis 28 A and 28 B only by operating the adjustment screws 50 a and 50 b . Since the adjustment mechanism 50 includes a set of a plurality of (two) adjustment screws 50 a and 50 b , flexibility in adjustment is high. The number of adjustment screws may be three or more.

In the portable information device 10 , the hinge mechanisms 19 are disposed at longitudinal (Y-direction) ends of each of the inner end surfaces 12 Aa and 12 Ba as one edges of the chassis members 12 A and 12 B. In this manner, the support plates 18 A and 18 B are supported by the hinge mechanisms 19 and 19 at both ends. As a result, suppression of occurrence of a step between the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B can be further ensured so that the display 16 can be more stably supported.

The present invention is not limited to the embodiment described above, and can be, of course, freely changed without departing from the gist of the invention.

Although the support plates 18 A and 18 B are supported by the hinge chassis 28 A and 28 B in the configuration described above, supporting bases for the support plates 18 A and 18 B may be provided in addition to the hinge mechanisms 19 . For example, as illustrated in FIG. 4 , the support plates 18 A and 18 B may be supported by a pair of support bases (first support base and second support base) 60 a and 60 b in the X directions disposed across the inner end surfaces 18 Aa and 18 Ba of the support plates 18 A and 18 B. The support bases 60 a and 60 b are respectively fixed to the inner surfaces 12 Ac and 12 Bc of the chassis members 12 A and 12 B, for example, and two sets of the support bases 60 a and 60 b are provided in the Y directions.