JP2010073833A - Mobile terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a mobile terminal device for improving strength of a case and preventing a dent (sink) on a surface after molding or a plate protrusion to improve exterior quality of the case. <P>SOLUTION: A main case integrally molded of a first plate member 21 and a resin material 22 by molding and a second plate member 28 provided on a backside of the main case form a storage space of an electronic component. A frame 22a is formed of the resin material 22 along an outer rim of the first plate member 21. The first plate member 21 has an edge buried in the frame 22a formed to be a two-part bend containing a first curve C1 bent in an L-shaped cross section in the right-angled direction and a second curve C2 bent to be folded into a U-shaped cross section, wherein resin volumes of the frame 22a divided by the two-part bend 21b are substantially equal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile terminal device such as a mobile phone, and more particularly to improvement of case strength and improvement of exterior quality.

  Conventionally, a movable rear case having a movable front case and a movable rear case having a liquid crystal display unit, a fixed front case having an operation key, an antenna, a circuit board, etc., and a fixed rear case having a battery pack housing portion for housing a battery pack. There has been proposed a mobile phone device including a fixed portion provided with a connecting portion that connects the movable portion and the fixed portion in an overlapping manner. Due to the function of the connecting part, the movable part rotates to a predetermined opening angle with respect to the fixed part.

  In the conventional mobile phone device having such a configuration, the casing of the movable portion includes a flat box-shaped movable front case that opens completely on one side and a flat box-shaped movable rear case that opens fully on one side. Are combined. In the same way, the housing of the fixed part is configured by combining a flat box-shaped fixed front case that opens the entire surface and a flat box-shaped fixed rear case that opens the entire surface. . The front case and the rear case constitute a storage space for electronic components with their openings facing each other. And the gasket seal member for waterproofing is pinched over the perimeter to the opening edge part of both cases combined at this time. The gasket seal member is housed and disposed in a housing groove formed at the opening edge of both cases.

  A flexible cable for transmitting signals and supplying power is provided between the movable part and the fixed part. The flexible cable communicates with each other through a connecting portion that connects the movable portion and the fixed portion. The connecting portion has a hinge structure for connecting the movable portion and the fixed portion so as to be overlapped with each other, and the mechanical structure is complicated. In addition, in the hinge structure having the first rotation axis and the second rotation axis perpendicular to the first rotation axis, the structure is further complicated, which is one of the factors that prevent the apparatus from being thinned. For this reason, conventionally, a flexible cable that is thin and rich in flexibility has been adopted as the cable passing through the connecting portion (see, for example, Patent Document 1).

JP 2005-299835 A

  In the conventional portable terminal device as described above, for example, a so-called hybrid molded product in which a resin material and a sheet metal member are integrally molded may be used for the rear case. When using a molded product in which such a resin material and a sheet metal member are integrally molded, in order to improve the bending strength and torsional strength of the finished product after molding, the portion of the sheet metal member embedded in the resin material Bending the edge of is along the side.

  In the bending method, conventionally, for example, a method of bending the edge of the sheet metal material in a direction perpendicular to the main surface has been taken. However, without considering the flow of the resin considering only the rigidity of the molded product in this way, for example, if it is simply bent at a right angle, a large capacity part with a large amount of resin and a small capacity part with a small amount of resin May be formed. In injection molding, resin is injected into each part with a predetermined pressure. Since a large volume portion needs to be filled with a large amount of resin, a large injection pressure is required. However, if the pressure is insufficient, the resin may not be filled all over the corner. On the contrary, in the small capacity portion, the flow rate of the resin is increased, the pressure is increased, and stress is applied to the sheet metal member, so that the sheet metal member may be deformed.

  If the resin is insufficiently filled in every corner, a dimple will be formed on the surface when the product is finished, resulting in a loss of design. Further, when the sheet metal member is deformed, it may cause a problem of popping out of the resin. In order to prevent insufficient filling of the resin, the distance from the outer surface of the resin to the sheet metal member, that is, the resin thickness may be reduced. However, in the case where the edge of the sheet metal member is simply bent at a right angle as described above, if the resin wall thickness is reduced, the difference between the large capacity portion and the small capacity portion is further increased, so that the stress acting on the sheet metal member is further increased. There is a problem that it becomes large and easily protrudes from the resin. Therefore, conventionally, a portable terminal device having a case with a predetermined strength and improved exterior quality has been faced.

  Therefore, the present application has been made to solve the above-described problems of the prior art, and improves the strength of the case and prevents dents and sheet metal from jumping out on the surface after molding. An object is to obtain a portable terminal device that improves quality.

  In order to solve the above-described problems and achieve the object, in the mobile terminal device disclosed in the present application, a main case in which a first sheet metal member is integrally formed with a resin material by molding, and a back surface of the main case The second sheet metal member disposed in the space forms an electronic component storage space. In the main case, a frame portion is formed of a resin material on an outer edge portion of the flat plate-like first sheet metal member. A liquid crystal display unit is attached to the front of the main case. A back side recess is formed on the back surface of the main case with the back surface of the first sheet metal member as the bottom surface. A second sheet metal member is disposed on the back surface of the main case so as to cover the back side recess. The first sheet metal member includes a first bending portion whose end embedded in the frame portion is bent in a L-shaped cross section in a right angle direction from the flat main surface to the entire length, and the first bending portion. It is a two-stage bent shape portion including a second curved portion that curves so as to be folded back into a U-shaped cross section, and the resin volume of the frame portion divided by the two-step bent shape portion is approximately Are equal.

  According to the portable terminal device disclosed in the present application, the frame portion is formed of the resin material on the outer edge portion of the flat plate-like first sheet metal member, and the back side recess is formed on the back surface with the back surface of the first sheet metal member as the bottom surface. The first sheet metal member includes a first curved portion whose end embedded in the frame portion is curved in a L-shaped cross section in a direction perpendicular to the entire length from the flat main surface. It is a two-stage bent shape portion including a second curved portion that is curved so as to be folded back into a U-shaped cross section following the first curved portion. Therefore, the bending strength and torsional strength of the finished product can be improved as compared with the case where the edge of the sheet metal member is simply bent at a right angle. In addition, since the resin volume of the frame part divided by the two-step bent shape part is substantially equal, there is no part where the resin capacity becomes particularly larger than other parts, and the resin flow rate during insert molding is made constant. Thus, the stress acting on the first sheet metal member can be made uniform to prevent deformation. Moreover, each part can be filled with resin uniformly, and insufficient filling does not occur. Thereby, a dent (sink) can be prevented on the surface after molding, and the appearance design of the case can be improved.

  Exemplary embodiments of a portable terminal device according to the present invention will be described below in detail with reference to the accompanying drawings. Here, in this embodiment, an example of application to a mobile phone is shown as an example of a mobile terminal device. In addition, this invention is not limited by the Example shown below.

[External perspective view showing mobile phone 100]
FIG. 1 is an external perspective view showing an open state of the mobile phone 100 according to the present embodiment. As shown in the figure, the cellular phone 100 according to the present embodiment includes a fixed portion 2 and a movable portion 5 having a size substantially equal to the fixed portion 2. The fixed portion 2 and the movable portion 5 are both in the shape of a flat rectangular box, and one short side of each other is connected by a biaxial hinge portion 1 that is a connecting portion. The biaxial hinge part 1 connects the fixed part 2 and the movable part 5 in a foldable manner.

  Further, in the fixed unit 2 and the movable unit 5, the fixed unit 2 mainly used for transmission includes operation keys 8 such as ten keys (0 to 9) and various function keys (mode setting keys). On the other hand, the movable unit 5 mainly used for receiving a call includes an LCD unit (liquid crystal display unit) 26 having a display unit 26a, a receiving unit 10 having a built-in speaker, and the like. The LCD unit 26 of the present embodiment is a composite of a liquid crystal display panel and a touch panel, and has a liquid crystal display function and a touch operation function. The surface of the LCD unit 26 is covered with an acrylic layer.

  As in the conventional case, the housing of the fixed portion 2 is configured by a box-shaped fixed rear case 3 and a fixed front case 4 that are open on one surface, with their openings facing each other. On the other hand, the movable portion 5 has a structure in which a thin plate member is stacked on the movable main case 20 with the movable main case 20 as a center. The structure in which the thin plate member is stacked on the movable main case 20 is one of the features of the present embodiment. This will be described later.

[Biaxial hinge portion (connecting portion) 1 and fine coaxial cable 32]
FIG. 2 is a perspective view showing the structure of the biaxial hinge portion (connecting portion) 1 and the thin coaxial cable 32 passing through the biaxial hinge portion 1. 2 shows a state in which the connecting portion covers 1a and 1b shown in FIG. 1 are removed so that the structures of the biaxial hinge portion 1 and the thin coaxial cable 32 can be well understood. The biaxial hinge portion (connecting portion) 1 includes a first rotation mechanism portion 1A and a second rotation mechanism portion 1B. The first rotation mechanism unit 1A has a rotation center axis extending along the short side at one end of the fixed unit 2, and the movable unit 5 with respect to the fixed unit 2 from the folded state in which both overlap. The rotation center axis is rotated to a predetermined angle shown as an open state in FIG.

  On the other hand, the second rotation mechanism unit 1B extends from the center of the first rotation mechanism unit 1A and rotates the movable unit 5 around an orthogonal axis orthogonal to the first rotation mechanism unit 1A.

  A thin coaxial cable 32 that electrically connects the movable portion 5 and the fixed portion 2 passes through the biaxial hinge portion 1. As in the present embodiment, in the mobile phone 100 having high functionality such as a display screen touch operation function, a signal amount that can be transmitted by a conventional flexible cable is insufficient. Therefore, in the present embodiment, the thin coaxial cable 32 having a large signal transmission amount is used.

  The thin coaxial cable 32 is inserted from one end of the first rotating mechanism 1A at the corner of the fixed rear case 3 and passes through a through hole formed along the central axis of the first rotating mechanism 1A. Then, it extends to the movable part 5 side through a penetrating shaft formed along the central axis of the second rotation mechanism part 1B. The thin coaxial cable 32 electrically connects a circuit board (not shown) of the fixed part 2 and a circuit board (not shown) of the movable part 5. In the present embodiment, by using the thin coaxial cable 32 without using a flexible cable, the amount of signal transmission between the fixed portion 2 and the movable portion 5 is increased to promote higher functionality. Further, the reliability of the operation is improved by using the thin coaxial cable 32 which is resistant to noise.

  In the structure employing the thin coaxial cable 32 as in the present embodiment, if a waterproof structure using a gasket seal member is employed as in the prior art, the rotating shaft cylindrical portion of the second rotation mechanism portion 1B is replaced with the gasket seal member. The thickness of the device increases at the part where the Therefore, in this embodiment, the predetermined waterproofness is maintained by using the integrally molded movable main case 20 and the double-sided pressure-sensitive adhesive sheet without using the gasket seal member.

[Disassembled perspective view showing internal configuration of movable portion 5]
FIG. 3 is an exploded perspective view showing the internal configuration of the movable portion 5. In FIG. 3, the movable main case 20 is produced by insert molding a substantially flat first sheet metal member 21 punched out by a press or the like with a resin material 22 and has a hybrid structure of metal and resin. . The material of the first sheet metal member 21 is stainless steel SUS301 having a relatively high rigidity. The movable main case 20 is constituted by a flat plate-like first sheet metal member 21 whose outer edge is sealed by a resin material 22 by a predetermined width. That is, the movable main case 20 is formed with a frame portion 22a having a predetermined thickness and a predetermined width so that the first sheet metal member 21 is exposed at the center and the outer edge portion of the first sheet metal member 21 is embedded. It becomes the composition.

  The first sheet metal member 21 is exposed at the center of both the front side and the back side of the movable main case 20. And the level | step difference is formed between the said frame part 22a and the surface of the 1st sheet metal member 21, and the back surface by the thickness of the frame part 22a. That is, a front side recess 20a having the bottom surface of the first sheet metal member 21 as a bottom surface is formed on the front surface of the movable main case 20, and a back side recess 20b having the bottom surface of the first sheet metal member 21 as a bottom surface on the back surface of the movable main case 20. Is formed.

  The shape of the opening of the front recess 20a is substantially the same as the outer shape of the LCD unit 26, and the LCD unit 26 is fitted in the front recess 20a. A first double-sided pressure-sensitive adhesive sheet 25 is disposed between the LCD unit 26 and the frame portion 22a. The LCD unit 26 is adhered to the movable main case 20 by the first double-sided pressure-sensitive adhesive sheet 25. Yes. The first double-sided pressure-sensitive adhesive sheet 25 is obtained by forming a belt-like sheet into a frame shape, and the shape of the frame is substantially the same as the outer shape of the LCD unit 26. The LCD unit 26 is provided with an engaging claw 26b on a side portion, and is fixed to the movable main case 20 by the engaging claw 26b in addition to the first double-sided adhesive sheet 25. Will be described later.

  A second sheet metal member 28 is disposed behind the movable main case 20 so as to cover the back-side recess 20b. A second double-sided pressure-sensitive adhesive sheet 27 is sandwiched between the second sheet metal member 28 and the movable main case 20. The second double-sided pressure-sensitive adhesive sheet 27 is produced such that a belt-like sheet is bent so as to form a frame having the same shape as the outer shape of the second sheet metal member 28. The second sheet metal member 28 closes the opening of the back-side recess 20 b and forms a housing space for electronic components and circuit boards together with the movable main case 20. That is, in the present embodiment, the movable main case 20 and the second sheet metal member 28 constitute the casing of the movable portion 5. In the second sheet metal member 28, holes having various shapes necessary for mounting a part are perforated.

  Both the first double-sided pressure-sensitive adhesive sheet 25 and the second double-sided pressure-sensitive adhesive sheet 27 have a band width of 2 mm forming a frame. It has been experimentally verified that the width of 2 mm is an appropriate width to ensure waterproofing between the opposing members. By setting the width of the double-sided pressure-sensitive adhesive sheets 25 and 27 to 2 mm, a reliable waterproof function can be obtained, and the volume inside the housing is not reduced more than necessary, and an optimum housing structure can be obtained.

  The back surface of the second sheet metal member 28 is covered with a back design panel 30. The back design panel 30 is adhered to the second sheet metal member 28 by a third double-sided pressure-sensitive adhesive sheet 29 having substantially the same shape.

[Movable main case 20]
FIG. 4 is an exploded perspective view of the movable main case 20. FIG. 5 is a perspective view showing a state in which an end side of the first sheet metal member 21 covered with the resin material 22 of the first sheet metal member 21 is a two-step bent shape portion (clamp shape) 21b over the entire length. is there. FIG. 6 is a partial cross-sectional view of the movable portion 5 in the short side direction. FIG. 4 shows a state where the first sheet metal member 21 embedded in the resin material 22 as a finished part is removed from the resin. In FIG. 6, the acrylic layer 26 </ b> A, the touch panel 26 </ b> B, and the liquid crystal display panel 26 </ b> C in the LCD unit 26 are indicated by hatching indicating glass.

  In FIG. 6, the LCD unit 26 of this embodiment is a composite body in which the liquid crystal display panel 26C and the touch panel 26B are laminated as described above. In addition to the normal liquid crystal display function, the LCD unit 26 is operated by touching the display screen. It has a touch operation function to perform. The surface of the touch panel 26B is covered with an acrylic layer 26A as a protective layer that protects the screen against a touch operation. Further, behind the liquid crystal display panel 26C, a driving unit 26D of the liquid crystal display panel 26C and the touch panel 26B is provided.

  In FIG. 4, the movable main case 20 is formed by integrally molding the substantially flat plate-shaped first sheet metal member 21 and the frame-shaped resin material 22 as described above. And the 1st sheet metal member 21 is arrange | positioned in the center part, and it has the structure which encloses the outer peripheral part of this 1st sheet metal member 21 in frame shape (FIG. 3). And both the side parts extended in the longitudinal direction of the 1st sheet metal member 21 are made into the bending shape part 21b with two steps over the full length. As shown in FIG. 6, the two-step bent shape portion 21 b is embedded in a frame portion 22 a extending on both sides in the longitudinal direction of the movable main case 20. Details of the two-step bent shape portion 21b will be described.

[Bent shape with two steps (clamp shape)]
In FIG. 5 and FIG. 6, the first sheet metal member 21 has two opposite long sides embedded in the frame portion 22 a in two steps over the entire length for the purpose of improving the rigidity against bending and twisting of the movable main case 20. It is a bent shape part (clamp shape part) 21b. The two-step bent shape portion 21b includes a first curved portion C1 in which an end portion of the first sheet metal member 21 is curved with a predetermined curvature radius in a L-shaped cross section in a direction perpendicular to the main surface of the flat plate shape. Following the first curved portion C1, the second curved portion C2 has a cross-sectional shape including a second curved portion C2 that is bent so as to be folded back into a U-shaped cross section with substantially the same radius of curvature. That is, the two-step bent shape portion 21 b of the present embodiment is bent at a right angle of 180 degrees and 180 degrees with respect to the main surface of the first sheet metal member 21, and finally the end is the main section of the first sheet metal member 21. It is perpendicular to the surface.

  In the present embodiment, the two-step bent shape portion 21b is composed of the first bending portion C1 and the one second bending portion C2 that follows the first bending portion C1, but the second bending portion C2 is 1 in number. However, the present invention is not limited to this, and a plurality of U-shaped curved sections with opposite bending may be provided so as to meander continuously. The rigidity with respect to the bending torsion of the movable main case 20 is further improved by providing a plurality of U-shaped curved sections. However, the material of the first sheet metal member 21 is made of stainless steel SUS301 having relatively high rigidity as described above. For this reason, the bending process of the second bending portion C2 is not easy, and considering the cost, the shape having the second bending portion C2 as one like the shape of the present embodiment is optimal. The two-step bent shape portion 21b has a curved shape in which the thickness of the resin material 22 molded around it is substantially equal.

  The outer surface shape of the frame portion 22a of the resin material 22 embedding the two-step bent shape portion 21b is in a direction perpendicular to the main surface of the first sheet metal member 21 in order to facilitate the production of a mold for molding. It has an outer shape that can be divided into two. For example, the outer surface shape of the frame portion 22a for embedding the two-step bent shape portion 21b is formed on the main surface of the first sheet metal member 21 with the top portion protruding to the left of the curved surface formed on the left side in FIG. The curved surface can be divided into two in the vertical direction in FIG.

  Further, the outer surface shape of the frame portion 22a for embedding the first sheet metal member 21 is low on the second curved portion C2 side of the first sheet metal member 21, and is an inclined surface that is highly curved on the distal end side of the first sheet metal member 21. have. By making such an inclined surface, the resin volume of the frame portion 22a divided by the two-step bent shape portion 21 can be further equalized, so that there is no portion where the resin capacity is particularly larger than other portions, It is possible to prevent deformation by making the stress applied to the first sheet metal member 21 uniform by keeping the flow rate of the resin during insert molding constant.

  Further, the curved inclined surface has a gently concave central portion (position of the first sheet metal member 21). By gently denting in this way, even if a dent on the surface should occur, this can be made inconspicuous.

  The distance from the outer surface of the frame portion in which the first sheet metal member 21 of the two-step bent shape portion 21b is embedded to the first sheet metal member 21 is in the range of 0.7 mm to 1.0 mm. An appropriate distance that can prevent the first sheet metal member 21 from being deformed and projecting from the resin material and that can prevent dents on the surface is in the range of 0.7 mm to 1.0 mm. It has been verified by experiment.

[Fixing of the LCD unit 26 by the engaging claw 26b]
FIG. 7 is a perspective view showing a process of attaching the LCD unit 26 to the movable main case 20. FIG. 8 is a perspective view showing a state in which the engaging claw 26 b passing through the engaging hole drilled in the first sheet metal member 21 is engaged with the movable main case 20. FIG. 9 is a cross-sectional view of the engaging claw 26 b portion of the movable portion 5. The LCD unit 26 is fitted and mounted in the front side recess 20a provided on the front surface side of the movable main case 20 as described above (FIG. 3). As described above, the LCD unit 26 is attached to the front-side concave portion 20a having the first sheet metal member 21 formed on the front surface of the movable main case 20 as a bottom surface, thereby facilitating thinning and improving design. To do.

  As shown in FIG. 7, the LCD unit 26 has engaging claws 26 b that are provided so as to be bent at right angles to both end portions of both sides extending in the longitudinal direction. The LCD unit 26 is fixed to the movable main case 20 by engaging the engagement claws 26 b with the engagement holes 21 a drilled in the first sheet metal member 21 of the movable main case 20. The front end of the engaging claw 26b is chamfered for easy insertion. On the other hand, the opening edge of the engagement hole 21a is also chamfered for the same purpose. Further, the LCD unit 26 is fixed to the movable main case 20 by being attached by a first double-sided adhesive sheet 25 sandwiched between the LCD unit 26 and the movable main case 20.

  In the mobile phone 100 having such a configuration, even when the heavy LCD unit 26 is mounted, it can be surely supported, and at the same time, an appropriate waterproof function can be provided. Even if the LCD unit 26 is peeled off from the first double-sided pressure-sensitive adhesive sheet 25, the engagement claw 26b is engaged with the movable main case 20, so that the LCD unit 26 is detached from the movable main case 20. There is nothing to do.

[Biasing of engaging claw 26b by wedge 34]
10 to 12 show a modification of this embodiment. FIG. 10 is a perspective view showing a step of sandwiching a wedge 34 that urges the engaging claw 26b penetrating the engaging hole drilled in the first sheet metal member 21 outward. FIG. 11 is a partial enlarged view of region B shown in FIG. 10 showing a state in which the wedge 34 is sandwiched. FIG. 12 is a cross-sectional view showing a state in which the engaging claw 26 b of the movable portion 5 is bent by the wedge 34. In this example, a wedge 34 is inserted into the engagement hole 21 a of the first sheet metal member 21. The wedge 34 is a flat plate-shaped piece made of resin, and an inclined surface that is thinner toward the tip is formed at the tip. The wedge 34 is press-fitted between the opening edge of the engagement hole 21a in the engagement hole 21a and the engagement claw 26b, and presses the engagement claw 26b against the opening edge on the opposite side of the engagement hole 21a.

  In the mobile phone having such a configuration, the wedge 34 presses the engagement claw 26b against the opening edge of the engagement hole 21a opposite to the wedge 34, so that the engagement claw 26b always engages with a predetermined pressure. Since it comes into contact with the inner edge of the hole 21a, the LCD unit 26 is stably supported, and the reliability is improved.

[Removal of LCD unit 26]
Further, when the cellular phone 100 is disassembled, if the rear design panel 30 and the second sheet metal member 28 are removed from the back surface of the cellular phone 100, the engaging claws 26b are exposed. When bent in the direction, the engagement of the engagement claw 26b with the engagement hole 21a is released, and the LCD unit 26 can be easily removed.

  In addition, although the wedge 34 of the present embodiment is provided as a single component, the present invention is not limited to this and may be provided integrally with the second sheet metal member 28. With such a configuration, it is possible to reduce the number of parts and to improve workability by reducing fine parts and to reduce costs.

  In addition, although the said Example gave and demonstrated the foldable mobile phone which has a connection part as an example as a portable terminal device, the portable terminal device disclosed by this application is not restricted to a foldable mobile phone, but an integrated mobile phone. Even if it is wet, it can be summarized.

It is an external appearance perspective view which shows the open state of the mobile telephone 100 which concerns on a present Example. 1 is a perspective view showing the structure of a biaxial hinge portion (connecting portion) 1 and a thin coaxial cable 32 that passes through the biaxial hinge portion 1. 3 is an exploded perspective view showing an internal structure of a movable part 5. FIG. 3 is an exploded perspective view of a movable main case 20. FIG. It is a perspective view which shows a mode that the edge side covered with the resin material 22 of the 1st sheet metal member 21 of the 1st sheet metal member 21 becomes a two-step bending shape over the full length. FIG. 4 is a partial cross-sectional view of a movable part 5 in a short side direction. 5 is a perspective view showing a process of attaching the LCD unit 26 to the movable main case 20. FIG. 4 is a perspective view showing a state in which an engaging claw 26b penetrating an engaging hole drilled in a first sheet metal member 21 is engaged with a movable main case 20. FIG. It is sectional drawing of the engaging claw 26b part of the movable part 5. FIG. FIG. 5 is a perspective view showing a step of sandwiching a wedge 34 that urges an engagement claw 26b penetrating an engagement hole drilled in the first sheet metal member 21 outward. It is the elements on larger scale of the B area | region shown in FIG. 11 which shows a mode that the wedge 34 was inserted | pinched. FIG. 6 is a cross-sectional view of a portion showing a state in which an engagement claw 26b of the movable portion 5 is curved by a wedge 34.

Explanation of symbols

1 Biaxial hinge (connecting part)
DESCRIPTION OF SYMBOLS 1A 1st rotation mechanism part 1B 2nd rotation mechanism part 3 Fixed rear case 4 Fixed front case 5 Movable part 8 Operation key 9a Display part 10 Earpiece part 20 Movable main case (main case)
20a Front side recess 20b Back side recess 21 First sheet metal member 21a Engagement hole 21b Bent shape part with two steps (clamp shape part)
21c Chamfering 22 Resin material 22a Frame 25, 27, 29 Double-sided adhesive sheet 26 LCD unit (liquid crystal display unit)
26A Acrylic layer 26B Touch panel 26C Liquid crystal display panel 26a Display unit 26b Engaging claw 26c Chamfer 28 Second sheet metal member 30 Designed back panel 32 Fine coaxial cable 34 Wedge 100 Mobile phone (mobile terminal device)
C1 first bending portion C2 second bending portion

Claims (5)

The first sheet metal member is molded integrally with the resin material by molding, a frame portion is formed by the resin material on the outer edge of the flat plate-like first sheet metal member, and the back surface of the first sheet metal member is formed on the back surface. A main case with a back side recess formed on the bottom,
The liquid crystal display unit mounted on the front surface of the main case;
A flat plate-like second sheet metal member that is disposed on the back surface of the main case so as to cover the back-side recess, and forms a storage space for electronic components together with the main case;
The first sheet metal member includes an end embedded in the frame portion, a first curved portion that is curved in a L-shaped cross section in a direction perpendicular to the entire length from the flat main surface, and the first curved portion. It has a two-step bent shape portion including a second bent portion that curves so as to be folded back into a U-shaped cross section, and the resin volume of the frame portion divided by the two-step bent shape portion is approximately equal. The portable terminal device characterized by the above-mentioned. The outer surface shape of the frame portion for embedding the two-step bent shape portion is a curved surface that can be divided into two in the direction perpendicular to the main surface of the first sheet metal member. The portable terminal device according to claim 1. The outer surface shape of the frame portion for embedding the cross-sectional corrugated shape portion has a low inclined surface on the second curved portion side of the first sheet metal member and a high inclined surface on the distal end side of the first sheet metal member. The portable terminal device according to claim 1, wherein:   4. The mobile terminal device according to claim 1, wherein an outer surface shape of the frame portion in which the cross-sectional corrugated shape portion is embedded has a central portion that is gently depressed. 5. The distance from the outer surface of the said frame part which embeds the said cross-sectional corrugated shape part to a said 1st sheet metal member is 0.7 mm to 1.0 mm, The any one of Claim 1 to 4 characterized by the above-mentioned. The mobile terminal device according to 1.

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