JP4361364B2 - Mobile device - Google Patents

Description

  The present invention relates to a mobile terminal such as a mobile phone, and more particularly to a mobile terminal provided with display portions on the front and back sides of a housing.

In general, a folding type is widely used as a portable terminal such as a cellular phone. In this foldable portable terminal, in order to display various information such as date, time, or communication status even in a folded state as the thickness and weight of the portable terminal are further reduced, a display unit is provided on the front and back of the housing. Is provided.
However, as described above, when the display portions are provided on the front and back of the housing, the thickness is increased. For this reason, the display portions are arranged so as to overlap each other to reduce the thickness.
Japanese Patent Laid-Open No. 11-183905

  By the way, in recent years, with the demand for further thinning of portable terminals, thinner display portions have been developed, but such thin display portions have low strength against twists and forces applied perpendicular to the surface. There is a problem. For this reason, a reinforcing plate is provided on the back surface of the display portion for reinforcement. However, if such a reinforcing plate is provided, the overall thickness increases, and the demand for thinning cannot be satisfied.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable terminal provided with display portions on the front and back sides that can be sufficiently thinned while ensuring sufficient strength.

To achieve the above object, a mobile terminal according to the present invention is a portable terminal having a first display portion and a second display section the display surface of each other are provided so as to face the opposite direction, at least the The first display unit includes a first display having a display surface, and a first reinforcing plate provided on a back surface of the first display and having a notch , and the second display The portion includes a second display having a second display surface and a second reinforcing plate provided on the back surface of the second display, and the second reinforcing plate has a thickness on the back surface. A convex portion protruding in a direction, the convex portion being fitted into a cutout portion of the first reinforcing plate, and the second indicator being accommodated in the convex portion. To do.

Further, the invention is characterized in that a region of the second display unit facing the first display unit is inside an outer edge of the first display unit .

Further, the present invention is characterized in that the second reinforcing plate is interference-fitted with respect to the first reinforcing plate .

In the invention, it is preferable that the first display unit is a liquid crystal display device, and the second display unit is an organic electroluminescence device .

  According to the portable terminal of the present invention, since the second reinforcing plate is fitted into the cutout of the first reinforcing plate, the positioning and assembly of the first and second display units are facilitated, and a plurality of displays The strength of the display portion can be increased while minimizing the increase in thickness due to the overlapping of the portions.

  Moreover, according to this invention, the peripheral part of the 1st display part can be reliably reinforced by the 1st reinforcement board, and the whole 2nd display part accommodated in the recessed part by the 2nd reinforcement board In addition, since the concave portion of the second reinforcing plate is disposed in the cutout portion of the first reinforcing plate, the thickness of the second reinforcing plate is reduced even though the two display portions overlap. The increase can be minimized.

Moreover, according to this invention, the 2nd reinforcement board can be positioned reliably by the nail | claw part formed in the 1st reinforcement board, and workability | operativity at the time of an assembly can be improved.
According to the invention, in the mobile terminal in which the first display unit is directed to one surface of the housing and the second display unit is directed to the other surface, the first and second reinforcing plates A sufficient thickness reduction can be realized while securing a sufficient strength against a twist or a force perpendicular to the surface.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 shows the appearance of a portable terminal according to this embodiment.
Reference numerals 1 </ b> A and 1 </ b> B denote casings that are rotatably connected to each other by the hinge portion 2. The casing 1A is provided with an operation unit 3 including operation keys such as a numeric keypad. The casing 1B includes a first display unit 4A facing inward and a second display unit 4B facing outward. And are provided. In the present embodiment, the first display unit 4A is composed of a liquid crystal display device, and the second display unit 4B is composed of an organic electroluminescence device (hereinafter referred to as OEL).

  A half mirror 5 is provided on the surface (upper surface in FIG. 1) of the housing 1B so as to cover the second display portion 4B and its peripheral portion. The half mirror 5 transmits light rays from the inner second display section 4B to the outside and reflects light rays from the outside. On the top surface of the housing 1B, a push switch 6 used for operations such as display switching, a camera 7 used for photographing, and a flash device 8 that emits light during photographing are provided.

  Next, the internal configuration of the housing 1B will be described. 3 is a schematic side view of a display unit provided in the mobile terminal according to the present embodiment, FIG. 3 is an exploded perspective view illustrating the internal structure of the mobile terminal, and FIG. 4 is a reinforcement of the first display unit. FIG. 5 is a perspective view of the first reinforcing plate that is seen from the back side of the second reinforcing plate that reinforces the second display portion.

  As shown in FIG. 3, the mobile terminal according to the present embodiment includes a first display unit 11 corresponding to reference numeral 4 </ b> A in FIG. 2 and a second display unit 12 smaller than the first display unit 11 (reference numeral in FIG. 1). Corresponding to 4B). The first display unit 11 and the second display unit 12 are disposed in the same casing (not shown) in a state of being overlapped with each other.

  As shown in FIG. 4, the 1st display part 11 is equipped with the 1st reinforcement board 13 in the back surface which is the surface on the opposite side to the display surface 11a. The first reinforcing plate 13 has a notch 13a at a substantially central portion thereof.

The first reinforcing plate 13 includes a plurality of claw portions 13b and 13d and a tongue piece 13c at the peripheral portion of the notch 13a. Of these, the claw portion 13b is formed by forming the first reinforcing plate 13 into a predetermined planar shape by punching or the like and then vertically bending a portion formed to protrude inward of the notch 13a. It can be formed easily. The tongue piece 13c is formed by leaving the claw portion 13b in the space surrounded by the notch 13a without being bent. That is, the claw portion 13b and the tongue piece 13c can be formed together with processing such as punching, which is inevitably performed to form the notch 13a in the first reinforcing plate 13. And this 1st reinforcement board 13 positions and hold | maintains the 2nd display part 12 in the predetermined position with the said nail | claw part 13b and the tongue piece 13c.
In particular, a plurality of claw portions 13b are erected, and are preferably configured to fit and hold the outer periphery of the second reinforcing plate 15 in the opposing direction. By making contact with the bottom surface of the peripheral portion of the second reinforcing plate 15, not only can the positioning be performed more reliably, but the first reinforcing plate 13 and the second reinforcing plate 15 are connected to each other to reinforce each other. Further, the strength can be improved.
In addition, the claw portion 13d can also be formed by bending the claw portion 13d at a position corresponding to the outer periphery of the first reinforcing plate 13 in the direction opposite to the claw portion 13b during the processing for forming the notch 13a. The claw portion 13 d plays a role of holding the first display portion 11 and fixing the first reinforcing plate to the first display portion 11.

  In addition, as shown in FIG. 5, the flexible wiring board 14 is laminated | stacked on this 1st reinforcement board 13 on the surface side. The flexible wiring board 14 has a notch 14 a at a position corresponding to the notch 13 a of the first reinforcing plate 13. When the flexible wiring board 14 is laminated on the first reinforcing plate 13, The notch 13a of the first reinforcing plate 13 is not blocked.

  The second display unit 12 includes a second reinforcing plate 15 formed of, for example, stainless steel on the back surface, which is the surface opposite to the glass substrate 12a. The second reinforcing plate 15 has a shape in which a concave portion 15a is formed on the surface portion and a convex portion 15b is formed on the back surface portion by denting the substantially central portion. The second reinforcing plate 15 accommodates an OEL element body 12b constituting the second display portion 12 in the recess 15a. The element body 12 b is sealed in the recess 15 a by overlapping the glass substrate 12 a on the second reinforcing plate 15 and bonding the same.

  As shown in FIG. 6, a flexible wiring board 16 is connected to the second display unit 12, and the second display unit 12 is controlled by a signal supplied via the flexible wiring board 16. Is done.

  The first display unit 11 and the second display unit 12 as described above are overlapped with each other, and the convex portion 15 b of the second reinforcing plate 15 of the second display unit 12 is the first display unit 11 of the first display unit 11. By fitting into a notch 13a formed in one reinforcing plate 13, it can be easily positioned and assembled. It should be noted that the fitting here may be any of loose fitting, interference fitting, and intermediate fitting in the fitting on the machine tool.

As described above, the first display unit 11 and the second display unit 12 are a range in which the first display unit 11 overlaps the first reinforcing plate 13 and the second display unit 12 is the second reinforcing plate. The range overlapping 15 is arranged at a position shifted from each other.
In this embodiment, the second display portion 12 has a second reinforcing plate 15 on the back surface by a claw portion 13 b and a tongue piece 13 c formed on the first reinforcing plate 13 of the first display portion 11. The peripheral edge is locked, and the second reinforcing plate 15 is positioned by the notch 13 a of the first reinforcing plate 13.

  Thus, according to the mobile terminal according to the present embodiment, the first and second surfaces on the opposite sides of the display surfaces 11a and 12a of the first and second display units 12 directed to the opposite surfaces to each other. The first and second reinforcing plates 13 and 15 are provided to reinforce the display portions 11 and 12, respectively, and the first display portion 11 overlaps the first reinforcing plate 13 and the second display portion 12 Since the range overlapping the second reinforcing plate 15 is shifted from each other, the first and second display portions 11 and 12 are minimized while minimizing the increase in thickness due to the provision of the first and second reinforcing plates 13 and 15. The strength of can be increased.

  Moreover, the peripheral part of the 1st display part 11 can be reliably reinforced by the 1st reinforcement board 13, and the whole 2nd display part 12 accommodated in the recessed part 15a by the 2nd reinforcement board 15 is shown. In addition, by forming the recess 15a of the second reinforcing plate 12 in a range that does not overlap the first reinforcing plate 11, an increase in thickness can be suppressed.

  Furthermore, the claw portion 13b and the tongue piece 13c formed on the first reinforcing plate 11 can reliably position the second display portion 12, and workability during assembly can be improved. Further, since the height of the claw portion 13b and the tongue piece 13c is within a range not exceeding the thickness of the second display portion 12 positioned thereby, it is possible to provide the claw portion 13b and the tongue piece 13c. There is no loss of thickness reduction.

  That is, according to the embodiment, in the mobile terminal in which the first display unit 11 is directed to one surface of the housing and the second display unit 12 is directed to the other surface, the first and second The reinforcing plates 13 and 15 can realize a sufficient thickness reduction while securing a sufficient strength against a twist or a force applied perpendicular to the surface. Further, as in the above-described embodiment, the second display unit 12 has a planar shape of the first display unit 11 (more specifically, a planar shape of the notch 13a of the reinforcing plate 13 of the first display unit 11). Since the planar shape is reduced, the reinforcing plate 15 of the second display unit 12 can be stored in the notch 13a. Therefore, the thickness dimension of the portable terminal can be made as small as possible despite the structure in which two display portions (liquid crystal elements or the like) are stacked on the front and back.

  In the above embodiment, a liquid crystal display device is used as the first display unit 11 and an organic EL device is used as the second display unit 12. However, the first display unit 11 and the second display unit 12 are used. The display device used as is not limited to the above example.

It is a perspective view of the state where the portable terminal concerning this embodiment was folded. It is a perspective view of the state where the portable terminal concerning this embodiment was expanded. It is a schematic side view of the display part provided in the portable terminal which concerns on this embodiment. It is a disassembled perspective view explaining the internal structure of a portable terminal. It is a perspective view of the 1st reinforcement board which reinforces a 1st display part. It is the perspective view seen from the back surface side of the 2nd reinforcement board which reinforces a 2nd display part.

Explanation of symbols

4A, 11 First display portion 4B, 12 Second display portion 12a Glass substrate 12b Element body 13 First reinforcing plate 13a Notch portion 13b, 13d Claw portion 13c Tongue piece 15 Second reinforcing plate 15a Recessed portion

Claims (4)

In a mobile terminal having a first display unit and a second display unit provided so that the display surfaces of each other face in opposite directions,
At least the first display unit includes a first display unit having a display surface, and a first reinforcing plate provided on the back surface of the first display unit and having a notch ,
The second display unit includes a second display unit having a second display surface, and a second reinforcing plate provided on the back surface of the second display unit, and the second reinforcing plate includes A convex portion protruding in the thickness direction on the back surface, the convex portion being fitted into a cutout portion of the first reinforcing plate, and the second indicator being accommodated in the convex portion. mobile terminal, characterized in that there. 2. The mobile terminal according to claim 1, wherein a region of the second display unit facing the first display unit is located inside an outer edge of the first display unit . The mobile terminal according to claim 1 , wherein the second reinforcing plate is interference-fitted with respect to the first reinforcing plate . The first display unit is a liquid crystal display device;
The portable terminal according to any one of claims 1 to 3, wherein the second display unit is an organic electroluminescence device .

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