WO2004034760A1

WO2004034760A1 - Portable terminal

Info

Publication number: WO2004034760A1
Application number: PCT/JP2002/010615
Authority: WO
Inventors: Katsuhisa Furukawa; Tsuyoshi Kobayashi; Kanta Jyuudai; Yuiti Sawada
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2002-10-11
Filing date: 2002-10-11
Publication date: 2004-04-22
Also published as: AU2002368269A1

Abstract

A portable terminal which can be molded easily without requiring insert molding and suitable for making thin in which a internally threaded member is prevented from loosening or being removed from a boss. A boss (21) projecting from the inner surface (2A) of an outer case (2) is press fitted with a flanged internally threaded member (6) made of a metal, and a protrusion (32) protruding toward the flange part (63) of the internally threaded member (6) is provided at the circumferential edge of a through hole (31) made through an inner case (3). When a male thread (5) is screwed into the internally threaded member (6), the protrusion (32) abuts against the top surface of the flange part (63) through the through hole (41A) of a liquid crystal holder clamped between the cases (2, 3).

Description

Technical Field Mobile Terminal Device Technical Field>

The present invention relates to a mobile terminal device, and in particular, in a housing of the mobile terminal device, can prevent a metal fitting press-fitted into a boss in order to fix a joint between the housings and various members. The present invention relates to a portable terminal device as described above. Background technology>

Mobile phones are roughly classified into a rod-type (straight) type, in which the operation unit and the liquid crystal display unit are collectively housed in a single housing, and a folding type, which consists of two housings connected to each other via a hinge so that they can be opened and closed. It is known.

Also, in any of these types, the casing is usually made up of a pair of upper and lower cases, which are vertically divided in the thickness direction. It is formed by screwing and joining together with screws in this state, and various electronic components etc. are accommodated in the internal space of the case where the upper case and lower case are closed and joined. ing.

By the way, the upper case and the lower case that constitute this housing are usually mainly formed of a plastic resin material or the like, but in order to join these cases, one of the upper and lower cases has A threaded hole for attaching an external thread from outside is formed in a penetrating state, and on the inner surface of the other case, a boss with an increased wall thickness is used to directly screw in the external thread and cut the evening. Are known. In a housing with such a configuration, it is desirable that the thick part such as the boss into which the male screw is screwed is made as thick as possible in order to increase the joint strength as much as possible. Is formed thicker. However, in recent years, there has been an increasing tendency for mobile phones to be lighter and thinner. Under such circumstances, the housing having the above-described configuration is one of the obstacles to making mobile phones thinner. Cause. Therefore, a metal nut (hereinafter referred to as a “female screw member”) is pressed into the boss on the inner surface of the case of the mobile phone into which the male screw is screwed, and the bonding strength is increased. A proposal has also been made and developed to increase the number of cases, so that cases can be booked.

However, in the case of such a configuration in which the female screw member is press-fitted, when the male screw is screwed into the female screw member with excessive torque, that is, the female screw member is screwed to a predetermined depth of the nut and seated. If the screw is tightened later with a larger tightening force, or if it is used for a long time after manufacture, the female screw member that has been press-fitted will loosen and rattle from the boss, or in extreme cases, the female screw member from the boss. May come off.

Also, when molding the upper and lower cases with an appropriate resin material, a so-called insert molding, in which a female screw member is set inside the molding die in advance and the female screw member is integrally molded with the case, is used. It has been considered to secure the female screw member inside the boss by performing this process.However, in order to achieve this, a certain level of advanced molding technology is required, and various auxiliary facilities are required. It also has the problem of increasing

In view of the above circumstances, the present invention can prevent troubles such as loosening and loosening of the female screw member from the boss, and can be easily performed because insert molding is not required and is suitable for thinning. It is an object of the present invention to provide a portable terminal device which can be molded to a small size and which does not cause an increase in manufacturing cost. Invention disclosure>

First, the present invention is characterized in that a pair of cases having openings to be joined to each other and formed by resin molding are screwed together with a flanged screw in such a manner as to close the openings opened to each other, and integrated. A mobile terminal device having a housing formed by forming

A boss is protruded from the inner surface of the one case, and a female female screw member having a female thread is internally press-fitted into the boss.

A female screw member press-fitted into the boss of the one case; And a peripheral hole portion of the hole on the inner surface of the other case is provided with at least an upper surface of the flange of the female screw member of the one case. Having a protruding portion protruding toward the area including

When the male screw is screwed into the female screw member from the outside via the through hole, the projecting portion of the other case directly contacts the upper surface of the flange of the female screw member, or The female screw member is configured to be in contact with the upper surface of the flange through a through hole of the held member held between the cases. As a result, the projecting portion in the other case directly abuts on the upper surface of the flange of the female screw member, or the female screw member has a through hole of the pinched member held between these cases. Since the upper surface of the female screw member is always pressed against the upper surface of the female screw member, it is possible to prevent the female screw member from loosening and rattling or falling out of the boss in one case, and it is suitable for thinning. In addition, it is possible to manufacture a portable terminal device that does not require insert molding and thus does not cause an increase in manufacturing cost.

Secondly, the peripheral portion of the through hole on the outer surface of the other case has a concave portion which is recessed in two steps in a step shape, and the cross section of the peripheral portion of the other case has a uniform thickness. Formed,

In the lower part of the concave part, the head of the male screw is mounted flush with the lower part, and in the upper part of the concave part, a cap for closing the concave part and hiding the head of the male screw is provided in the other case. Attached flush with the outer surface

It is characterized by:

This prevents sinks and the like from occurring at the time of resin molding at the peripheral portion of the other case having a uniform cross section.

Thirdly, the outer diameter of the flange of the female screw member is larger than or the same as the outer dimension of the open upper surface of the boss. Thus, the flange of the female screw member can be firmly and stably contacted with the upper surface of the boss, and the work of press-fitting the female screw member into the boss can be easily performed. Fourth, the outer diameter of the flange of the female screw member is larger than the inner diameter of each of the through hole of the other case and the hole of the held member. It is characterized by.

Thereby, it is possible to prevent troubles such as being difficult to remove or not removing when the male screw is loosened to remove both cases by being fitted into the through hole of the other case and the hole of the sandwiched member.

Fifth, the female screw member is provided with at least one groove along an outer peripheral surface.

As a result, the female screw member press-fitted into the boss hole of the boss generates a stopper action in the groove, and can be fixed to the boss with a large retaining force.

Sixth, the female screw member is characterized in that the outer peripheral surface is subjected to a twill processing.

As a result, a lattice-shaped narrow groove is formed in the part where the twill processing is performed, so that the frictional force is increased by that amount, and a greater retaining force is generated when the groove is pressed into the boss o

Seventh, the invention is characterized in that the held member is constituted by a liquid crystal holder for holding a liquid crystal screen.

As a result, when the pair of cases are screwed together with male screws, the liquid crystal holder can be assembled and fixed together with the liquid crystal holder positioned in these cases. Eighthly, the invention is characterized in that the held member is formed of an electromagnetic shield case.

Thus, when the pair of cases are integrally screwed together with the male screw, the electromagnetic shield case can be assembled and fixed together with the electromagnetic shield case positioned in these cases.

Ninth, the pinched member is constituted by a washer, a C-ring or an E-ring.

As a result, not only the female screw member of one case can be pressed against the female screw member of one case with the washer, the C ring, or the E ring, but also, when the pair of cases is joined, the protrusion of the other case, Even when a gap is formed between the female screw member of one of the cases due to an error during molding and the like, the error can be compensated for by the washer, the C ring, the E ring, or the like. Also, in a tenth aspect, the housing is configured by a rod-shaped one in which a display unit and an operation unit are provided in one housing.

This prevents troubles such as loosening and loosening of the female screw member from the boss in one of the cases, and removal of the female screw member, and is suitable for thinning, and does not require insert molding. It is possible to manufacture a rod-shaped mobile terminal device that does not cause an increase in the number of mobile terminals.

Also, firstly, the case is characterized in that the case is constituted by a folding type having an upper case and a lower case connected to each other by a hinge portion.

As a result, troubles such as looseness of the female screw member from the boss in one of the cases and looseness and removal of the screw member can be prevented, and it is suitable for thinning and does not require insert molding. It is possible to manufacture a foldable portable terminal device that does not increase the cost.

FIG. 1 is an exploded perspective view showing a part (upper case) of a case of a foldable mobile phone according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a boss and the like of an outer case of an upper case of the mobile phone shown in FIG. 1;

FIG. 3 is a cross-sectional view showing a main part of an upper case of the mobile phone shown in FIG. 1. FIG. 4 is a sectional view showing an external thread in the case of the foldable mobile phone according to the first embodiment of the present invention. It is a cutaway view showing a female screw member for screwing

FIG. 5 is a cutaway view showing a modified example of the female screw member according to the present invention,

FIG. 6 is a cutaway view showing still another modification of the female screw member according to the present invention. FIG. 7 is an explanatory diagram showing a state before the female screw member is pressed into the boss in the housing of the foldable mobile phone according to the first embodiment of the present invention,

FIG. 8 is an explanatory diagram showing a state when the female screw member is pressed into the boss in the housing of the foldable mobile phone according to the first embodiment of the present invention,

FIG. 9 is a cross-sectional view showing a part (upper case) of the case of the foldable mobile phone according to the second embodiment of the present invention. In addition, the code | symbol in a figure, 1 is an upper (1st) housing, 2 is an outer case (one case), 2A is an inner surface, 21 is a boss, 21A is a boss hole, 3 is an inner case (the other case), 3A is the inner surface, 3B is the outer surface, 31 is the through hole, 32 is the protruding part, the upper part 32A, the lower part 32B, 4 is the liquid crystal (LCD) holder, 41 is the pinched part, 41A is the round hole (through hole ), 41B is an extension, 5 is a male screw, 51 is a head, 52 is a flange (flange), 6 is a female screw member, 61 is a main body, 61A, 6 IB is a groove, and 61C is a twill groove , 62 is an inner hole, 62 A is a female thread, 63 is a flange (flange), 7 is a female thread member, 71 is a main body, 71 A is a groove, 73 is a flange, and 8 is a female thread member, 81 Is a main body, and 9 is a blindfold member (cap).

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(First Embodiment)

FIG. 1 shows a part of a foldable mobile phone according to a first embodiment of the present invention. In this mobile phone, a housing portion includes an upper (first) housing 1 and It has a lower (second) housing (not shown) and a hinge (not shown) that rotatably connects these housings.

The upper (first) housing 1 generally includes an outer case 2 and an inner case 3, and has a liquid crystal (LCD) holder 4 sandwiched between the two cases. In other words, the screws are screwed together with a male screw 5 in a state where the openings of the outer case 2 and the inner case 3 described later are closed together. It is formed.

• For outer case 2:

Of these, the outer case 2 is formed into a substantially rectangular thin box (or shallow dish) by an appropriate molding method using an appropriate thermoplastic resin material such as polycarbonate ABS, for example, by injection molding. One side is open for joining with the inner case 3. In addition, bosses 21 as shown in FIG. 2 are provided at four corners of the open inner surface 2A of the outer case 2, and the bosses 21 are provided with bosses. Hole 21A is formed, and female screw member 6 is press-fitted into boss hole 21A. • About inner case 3:

On the other hand, the inner case 3 is made of, for example, an appropriate thermoplastic resin material in which an appropriate additive is added to and mixed with polycarbonate or the like, or a molding material made of a resin such as polycarbonate, ABS or magnesium, or a metal. The outer case 2 is formed into a substantially rectangular thin box shape (or shallow dish type) by an appropriate molding method similar to that of the outer case 2, for example, by injection molding. One side is similarly open. Further, in the inner case 3, through holes 31 into which male screws 5 to be screwed into the female screw members 6 of the outer case 2 enter from outside are formed at four corners. As shown in FIG. 3, the inner case 3 has an inner surface 3 A at the periphery of the through-hole 31 and at least an upper surface of a later-described flange portion 6 3 of the female screw member 6 of the outer case 2. The protrusion 32 protrudes toward the area including the through hole 31. In particular, the protrusion 32 is closer to the center (upper part 32A) facing the through hole 31 (outer part (lower part 3A)). It consists of two steps projecting one step higher than 2 B).

The upper portion 32 A has a protruding upper surface portion pressed against the upper surface of the flange portion 6 3 of the female screw member 6 via a sandwiched portion 41 described later of the liquid crystal (LCD) holder 4. This constitutes a retaining means for preventing the female screw member 6 from coming out of the boss 21.

On the other hand, a concave portion 33 is formed on the outer surface 3B of the inner case 3 at the periphery of the through hole 31 and faces the through hole 31 opposite to the protruding portion 32 on the inner surface side. The central part (lower part 33A) consists of two steps that are one step deeper than the outer part (upper part 33B).

The lower section 33A is formed at a depth corresponding to the thickness of the head of the male screw 5 described later with respect to the upper section 33B, and the lower section 33A is formed. The inner diameter is slightly larger than the outer diameter of the head of the male screw 5.The male screw 5 is inserted into the through hole 31 from the outside of the inner case 3 and screwed into the female screw member 6. When this is done, the head of the male screw 5 does not protrude toward the upper part 33B, that is, the upper surface of the head of the male screw 5 and the floor of the upper part 33B are almost flush.

Also, when the female screw member 6 is attached, The recess between the outer surface 3B of the case 3 and the recess corresponding to the depth of the upper section 33B prevents troubles such as the male screw 5 being tampered and falling out, and the male screw 5 A blindfold member (cap) 7 made of an elastic material such as rubber is detachably fitted in order to hide and enhance the aesthetic appearance.

As described above, the inner case 3 has the protrusions 32 (similar to the recesses 33) formed in two steps, but the thickness of the steps at each step is substantially uniform. With such a configuration, it is possible to prevent the occurrence of sink marks or the like at the protruding portions 32 (the same applies to the concave portions 33) when the inner case 3 is formed.

Further, in the inner case 3, the through hole 31 is not a female screw and is a simple straight hole. However, the female screw may be used.

• About the liquid crystal (LCD) holder 4:

The liquid crystal (LCD) holder 4 is for holding the liquid crystal display screen. As shown in Fig. 1, when the outer case 2 and the inner case 3 are joined and integrated, they must be held together. The outer case 2 and the inner case 3 are positioned and fixedly integrated with each other.The thin plate is formed in a substantially rectangular shape, and a substantially disc is formed at a corner near the hinge portion (not shown). A pair of left and right holding portions 41 project from each other.

As shown in Fig. 3, the pinched portion 41 has a round hole (through hole) 41A at the center, and the round hole 41A has a male thread 5 of a male thread. (Hereinafter, this is referred to as a male screw part). In this round hole 41A, the inner diameter is larger than the outer diameter of the male screw portion of the male screw 5, and at least the outer diameter of the female screw member 6 because the female screw is not cut. (However, excluding the flange). Further, the pinched portion 41 is formed in a skirt shape toward the inner wall surface 2 A of the outer case 2 in a state in which the upper portion (tip portion) of the female screw member 6 which is press-fit into the boss 21 is taken in. O An extension 4 1 B is provided.

In addition, the liquid crystal (LCD) holder 4 has two corners opposite to the two corners where the pinching portions 41 are provided in FIG. 1 and two inner corners of the inner case 3. A claw member 42 for locking to the formed locking portion (not shown) is projected and provided on both sides. A locking projection 43 for locking to the inner surface of the inner case 3 is provided on the edge.

In the present embodiment, the pinched portion 41 also functions as a spacer that fills the gap between the outer case 2 and the inner case 3, and if the pinched portion 41 is not provided, Alternatively, the upper portion 32A of the protruding portion 32 of the inner case 3 may directly contact the upper surface of the flange of the female screw member 6, but in this case, the boss 2 It is necessary to increase the protruding height of 1 or the protruding part 3 2 The upper step 3 1 The protruding height of 1 A (thickening the wall thickness) is required. May occur.

Therefore, when there is a possibility that such a gap may occur, in addition to the liquid crystal (LCD) holder 4 as in this embodiment, which can also function as a stirrer, for example, an electromagnetic shield case, A pinched portion provided with a hole such as a printed circuit board may be pinched, or a spacer such as a washer, a C-ring, or an E-ring may be simply provided. If the shield case is sandwiched, the shielding properties can be enhanced depending on the shape of the shield case, and, of course, the functions as positioning means and fixed holding means can be added. Similarly, when a printed circuit board is provided, it is possible to add functions as positioning means and fixed holding means.

• About male screw 5:

As shown in FIGS. 1 and 3, the male screw 5 has a head 51 with a flat upper surface and a head 52 with a flange 52 protruding to the side. The male screw 5 has a configuration different from that of a wood screw that taps the other side while being screwed in (that is, the tip opposite to the head also has a flat shape). The outer case 2 and the inner case 3 can be opened and disassembled repeatedly over and over again, since attachment and removal to and from the female screw member 6 can be repeated. ing.

• For female screw member 6:

The female screw member 6 is made of an appropriate metal, for example, brass, and has an inner hole (in this embodiment, vertically penetrated) of a substantially cylindrical body 61 as shown in FIG. The female screw 6 2 A is cut over the entirety of (2). In addition, a flange 63 protruding from the outer periphery is formed at the upper part of the main body 61.

The main body 61 has at least one or more grooves along the outer peripheral surface, for example, in this embodiment, two grooves 61A and 6IB at an intermediate portion and an upper portion adjacent to the flange portion 63 over the entire circumference. The inner wall of the boss 21 enters the grooves 61A and 61B to prevent the female screw member 6 from coming off. In addition, the main body 61 is provided with a twill-shaped groove 61C, that is, knurling, on the outer peripheral surface. Since the groove is formed, the frictional force on the outer peripheral surface is increased, so that the boss 21 is formed. The function of preventing the female screw member 6 being press-fitted from coming off can be further enhanced.

As shown in FIG. 7, the outer diameter D1 of the main body 61 is slightly larger (D1> D2) than the inner diameter D2 of the boss hole 21A before being pressed into the boss 21. By press-fitting, the boss-side meat portion enters the grooves 61A and 6IB of the main body 61 in a state of being cut into the groove, and does not come out of the boss hole 21A. As shown in FIG. 7, the outer diameter D 3 of the flange 63 is larger than the inner diameter D 2 of the boss hole 21 A (D 3> D 2). External dimensions of the open top surface of the boss 21 after press-fitting are equal to or larger than D2 (D3> D2, and D3> D5, where D5 is the inner diameter of the through hole 31 (see Fig. 8)) It is good.

That is, the outer diameter D 3 of the flange 63 may be formed larger than the inner diameter D 5 of the through hole 31 of the inner case 3. In this case, the outer diameter D 3 of the flange 63 is The outer diameter dimension D4 of the boss 21 may be D4> D3 in FIG.

Further, in the present embodiment, the outer diameter dimension D 3 of the flange 63 of the female screw member 6 is different from that of the through hole 31 of the inner case 3 and the round hole (through hole) 41 A of the liquid crystal (LCD) holder 4. Although it is formed so as to be larger than the inner diameter, in particular, in the present invention, at least the following relationship may be satisfied.

D 3> D 5

Where D 3 is the outer diameter of the flange 63 D 5: Inside diameter of through hole 3 1

The female screw member 6 is not particularly limited to the present embodiment. For example, as shown in FIG. 5, a groove 71 A provided on the outer peripheral surface of the main body 71 of the female screw member 7 is It may be provided only at the upper portion adjacent to the flange portion 73, or vice versa. Also, the number of grooves is not limited to one or two, but may be three or more, or may not be provided at all.

Further, it is preferable that the knurling is provided on the entire outer peripheral surface of the main body excluding the flange portion. For example, as shown in FIG. 6, not on the entire outer peripheral surface of the main body 81 of the female screw member 8, but on a part thereof. It may or may not be provided.

Next, a method of press-fitting the female screw member 6 according to the present embodiment into the boss hole 21A of the outer case 2 will be described with reference to FIGS.

(1) As described above, the outer case 2 is formed by an appropriate molding method using, for example, an appropriate thermoplastic resin material such as polycarbonate or ABS, for example, by injection molding. As shown in FIG. 7, a boss hole 21A is opened in each boss 21 on the inner surface 2A of the outer case 2 after being formed by the forming method.

(2) As shown in FIG. 7, the female screw member 6 having an outer diameter larger than the inner diameter of the boss hole 21 A is heated to a required temperature in an environment (or by applying ultrasonic waves). Press into the boss hole 21A.

(3) Then, as shown in FIG. 8, the outer case 2 including the boss 21 is heated and softened to some extent. Therefore, when the female screw member 6 having an outer diameter larger than the inner diameter of the boss hole 21A is press-fitted, the boss A portion of the meat of the boss 21 near the outer peripheral surface of the hole 21A is extruded and moves downward, enters the grooves 61A and 61B of the female screw member 6, and is excessively pushed out. The meat enters the space at the bottom of the boss hole 21A.

(4) After that, by cooling the outer case 2 to a predetermined temperature (for example, normal temperature), a part of the meat on the boss 21 side enters the grooves 61A and 61B of the female screw member 6. As shown in FIG. 8, the female screw member 6 is fixed in the boss hole 21 A, and is fixed.

(5) Thereby, the female screw member 6 is firmly attached to the boss hole 21A.

Next, the housing part of the mobile phone according to the present embodiment (however, here, the upper side (first) The case 1 will be described, but the same applies to the lower (second) case outside the figure. ) Will be described.

(1) As described above, with the sandwiched portion 41 of the liquid crystal (LCD) holder 4 sandwiched between the outer case 2 and the inner case 3, the respective openings of the outer case 2 and the inner case 3 are Close up. In this case, prior to the screwing operation with the male screw 5, the two cases 2 and 3 may be temporarily fixed and fixed with an appropriate jig or the like.

(2) Then, with the outer case 2 and the inner case 3 closed together, external threads 5 are inserted into the through holes 3 1 at the four corners of the inner case 3 from the outside, and the tip of the male screw 5 is a liquid crystal. (LCD) Insert the round hole (through hole) 41 A of the pinched portion 41 of the holder 4 and screw it into the female screw portion 62A of the female screw member 6.

(3) In this way, when the male screw 5 is screwed into the female screw part 62 A of the female screw member 6 to the end, and the outer case 2 and the inner case 3 are joined together while the liquid crystal (LCD) holder 4 is sandwiched, At the same time, the liquid crystal (LCD) holder 4 is fixed in a predetermined position.

(4) Lastly, if the blinds (caps) 9 are fitted in the recessed part 33 in the outer surface 3B around the outer case 3B, especially the upper part 33B, the top surface of the male screw 5 will be It can be blindfolded and look better.

Therefore, according to the present embodiment, for example, if the two cases 2 and 3 are fixed and held in a state of being tightly closed with each other before the male screw 5 is screwed, the female screw member 6 The upper surface is in contact with the lower surface of the held portion 41 of the liquid crystal (LCD) holder 4, and the held portion 41 is located on one surface of the upper portion 32 A of the protruding portion 32 of the inner case 3 (see FIG.

In FIG. 3, since the female screw member 6 is pressed by the lower surface, a pressing force for holding the female screw member 6 by the pinched portion 41 is generated.

Therefore, when the male screw 5 is screwed to the female screw member 6, even if the male screw 5 is tightened with excessive torque, it is possible to reliably prevent the female screw member 6 from floating from the boss hole 21A.

Moreover, once the two cases 2 and 3 are joined in such a state, the pinched portion 41 of the liquid crystal (LCD) holder 4 becomes the upper portion of the projection 32 of the inner case 3. It is pressed down by one surface of 32 A (the lower surface in Fig. 3), and one surface of the upper part 32 A of the protrusion 32 (the upper surface in Fig. 3) is the lower surface of the flange 53 of the male screw 5. Since the male screw 5 is screwed to the female screw member 6, the female screw member 6 floats up from the boss hole 21A even if it is used for a long period of time. It can reliably prevent rattling and getting out in extreme cases.

(Second embodiment)

FIG. 9 shows a part of the mobile phone according to the second embodiment of the present invention. In this mobile phone, the housing portion is similar to that of the first embodiment in the upper part (the first part). ) A housing 1, a lower (second) housing not shown, and a hinge (not shown) for rotatably connecting these housings.

The upper (first) housing 1 generally includes an outer case 2 and an inner case 3, and a liquid crystal (LCD) holder as in the first embodiment is provided between the two cases. The outer case 2 and the inner case 3 are closed by directly contacting each opening described later, and screwed together with the male screw 5 to form an integral unit ing.

That is, in the second embodiment, when the male screw 5 is screwed into the female screw member 6 from the outside via the through hole 31, the protrusion 32 of the inner case 3 is directly connected to the flange of the female screw member 6. It comes into contact with the upper surface of the part 63.

Therefore, as in the first embodiment, when the male screw 5 is screwed to the female screw member 6, even if the male screw 5 is tightened with excessive torque, the female screw member 6 rises from the boss hole 21 A. It can be reliably prevented.

Further, even if the female screw member 6 is used for a long period of time, it is possible to reliably prevent the female screw member 6 from floating from the boss hole 21A and rattling or coming out in an extreme case.

In the first and second embodiments, as a mobile phone, a housing includes a foldable type including an upper housing (not shown) and a lower housing 1 (not shown) mutually connected by a hinge (not shown). However, this housing may be a bar-shaped housing in which the display unit and the operation unit are provided in one housing. Further, in the present invention, the mobile phone as in these embodiments is used. The present invention is not limited to a talker, but can be applied to various types of portable terminal devices, and is particularly advantageous for a thin housing. Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

According to the present invention, a boss protrudes from the inner surface of one of the cases, and a female screw member with a flange formed of metal and internally cut into the boss is press-fitted into the boss,

The other case has a through hole in which the head of the male screw is locked at a position corresponding to the female screw member press-fitted into the boss of one case, and the peripheral portion of the through hole on the inner surface of the other case has one side. When a male screw is screwed into the female screw member from the outside via a through hole, the protrusion of the other case is formed by the flange of the female screw member. Or directly contact the upper surface of the flange of the female screw member through the hole of the member to be clamped held between these cases, and the projecting portion in the other case is Directly contacting the upper surface of the flange of the female screw member, or contacting the upper surface of the flange of the female screw member through the through-hole of the pinched member sandwiched between these cases; Since the top surface is constantly pressed, Or rattle loose female screw member from the boss in the over scan, a trouble such as getting out can be prevented.

Claims

The scope of the claims

1. A mobile terminal having a housing formed by screwing a pair of cases having openings to be joined to each other and formed by resin molding with male screws in such a manner as to close the openings opened to each other, and integrating them. A device,

A boss protrudes from an inner surface of the one case, and a female screw member with a flange formed of metal and internally threaded is press-fitted into the boss,

The other case has a through hole in which the head of the male screw is locked at a portion corresponding to the female screw member press-fitted into the boss of the one case, and the through hole in the inner surface of the other case. Has a protruding portion protruding toward the flange of the female screw member of the one case,

When the male screw is screwed into the female screw member from the outside via the through hole, the projecting portion of the other case directly contacts the upper surface of the flange of the female screw member, or A portable terminal device configured to be in contact with an upper surface of the flange of the female screw member via a hole of a held member held between the cases.

2. In the outer peripheral portion of the through hole on the outer surface of the other case, there is a concave portion that reaches up and down two steps in a step shape, and the cross section of the peripheral portion of the other case is formed to have a uniform thickness And

In the lower part of the recess, the head of the male screw is mounted flush with the head, and in the upper part of the recess, a cap for closing the recess and hiding the head of the male screw is provided in the other part. It was installed flush with the outer surface of the case

2. The mobile terminal device according to claim 1, wherein:

3. The mobile phone according to claim 1, wherein an outer diameter of the flange of the female screw member is larger than or the same as an outer dimension of an upper surface of the boss opening. Terminal device.

4. The outer diameter of the flange of the female screw member is larger than the inner diameter of each of the through hole of the other case and the hole of the held member, respectively. 4. The mobile terminal device according to any one of claims 1 to 3.

5. The portable terminal device according to any one of claims 1 to 4, wherein the female screw member has at least one groove along an outer peripheral surface.

6. The portable terminal device according to any one of claims 1 to 5, wherein the female screw member is provided with a twill processing on an outer peripheral surface.

7. The portable terminal device according to any one of claims 1 to 6, wherein the sandwiched member is configured by a liquid crystal holder that holds a liquid crystal screen.

8. The portable terminal device according to claim 1, wherein the held member is formed of an electromagnetic shield case.

9. The portable terminal device according to any one of claims 1 to 8, wherein the held member is constituted by a washer, a C ring, or an E ring.

10. The portable terminal according to any one of claims 1 to 9, wherein the casing is configured as a rod-shaped one in which a display unit and an operation unit are provided in one casing. apparatus.

11. The housing according to any one of claims 1 to 10, wherein the housing is a folding type having an upper housing and a lower housing connected to each other by a hinge portion. The mobile terminal device according to claim 1.