JP2008131440A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve reliability of conduction between a plate member and a specific ground member for a portable terminal device which has a case member having the plate member formed by insert molding. <P>SOLUTION: A portable telephone 1 is provided with a housing 22 on the display side, a resin case member 52 which constitutes the housing 22 on the display side, the plate member 53 which is formed integrally with the case member 51 by insert molding, a circuit board 40 which is arranged in the housing 22 on the display side and a spring member 150 which establishes electrical continuity between the plate member 53 and the circuit board 40 by making contacts with them. The case member 51 has a molded part 55 which is formed in such a way that it covers the whole or a part of the periphery of the plate member 53 and an opening 57 which is formed in the molded part 55 and exposes the plate member 53. The spring member 150 is inserted into the opening 57 and makes contacts with the plate member 53. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable terminal device having a case member in which a sheet metal member is insert-molded.

  In recent years, as the thickness of mobile terminal devices such as mobile phones has been reduced, securing strength in mobile terminal devices has become a problem. On the other hand, a portable terminal device has been proposed in which a reinforcing sheet metal member is provided on the back side of the display module (see Patent Document 1).

  When the reinforcing sheet metal member is provided in this manner, it is necessary to conduct with a predetermined ground member via a predetermined conductive member for countermeasures against static electricity generated in the sheet metal member. As shown in FIGS. 6 to 8, as a structure for this conduction, a plurality of tongues are formed by cutting out the outer periphery of the sheet metal member, and a conduction member is formed between the tongue piece and a circuit board as a ground member. An example of the conductive structure in which is arranged. However, in this case, the sheet metal member is fixed to the case member by screwing or the like, but the tongue piece is not fixed and may be deformed (displaced), and this deformation (displacement) may adversely affect the conductivity. There is.

Further, in order to achieve both further thinning and securing of strength, a configuration in which the sheet metal member is integrated with the case member by insert molding is conceivable. Insert molding is a method of making an integrated composite part by loading an insert product into a mold, injecting resin, wrapping the insert product with a molten resin and solidifying it. Thus, even when the sheet metal member is integrated with the case member by insert molding, as in the case described above, if the portion of the sheet metal member that contacts the conductive member is easily deformed (displaced), the conduction is There are cases where it cannot be performed reliably.
JP 2005-192012 A

  One object of the present invention is a portable terminal device having a case member in which a sheet metal member is insert-molded, and is to improve the reliability in conduction between the sheet metal member and a predetermined ground member.

  The portable terminal device of the present invention includes a housing, a resin case member constituting the housing, a sheet metal member integrally formed with the case member by insert molding, and a ground disposed in the housing. And a conductive member that contacts the sheet metal member and the ground member for electrical conduction, and the case member covers all or part of the outer periphery of the sheet metal member. A mold part formed on the mold part, and an opening part formed on the mold part for exposing the sheet metal member, wherein the conductive member is inserted into the opening part and abuts on the sheet metal member. To do.

  Moreover, it is preferable that the said conduction | electrical_connection member is comprised by the elastic member which can be elastically deformed.

  Further, the sheet metal member has a stepped step portion formed on an outer periphery, the mold portion is formed so as to cover the stepped portion, and the opening portion exposes the stepped portion. preferable.

  Moreover, it is preferable that the said mold part has a support part which supports the said ground member.

  Moreover, it is preferable that the said sheet-metal member has a contact part which contact | abuts directly to the ground site | part of the said ground member.

  According to the present invention, since the case member in which the sheet metal member is insert-molded is provided as the case member constituting the casing, the strength of the casing can be improved. In addition, the mold part formed so as to cover the outer periphery of the sheet metal member by insert molding is formed with an opening for the sheet metal member to be exposed, and the conductive part is connected to the ground member via a predetermined conductive member. Thus, the conductive member can be brought into contact with the portion that is difficult to be deformed (displaced). Therefore, certainty in conduction between the sheet metal member and the ground member can be improved.

  Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, a mobile phone will be described as a mobile terminal device. However, the present invention is not limited to this, and a PHS (Personal Handy Phone System), a PDA (Personal Digital Assistant), a portable navigation device, a notebook personal computer, a digital Other portable terminal devices such as a camera and a small audio player may be used.

  FIG. 1A shows a front view of a mobile phone 1 according to an embodiment of the present invention. FIG. 1B shows a side view of the mobile phone 1 according to an embodiment of the present invention. As shown in FIGS. 1A and 1B, the mobile phone 1 is a foldable mobile phone 1, which has a rectangular and thin operation unit side body 21 and a rectangular and thin display. A part-side housing 22.

  The upper end portion of the operation unit side body 21 and the lower end portion of the display unit side body 22 are connected via a hinge mechanism 26 so as to be opened and closed. The cellular phone 1 relatively rotates (rotates) the operation unit side body 21 and the display unit side body 22 connected via the hinge mechanism 26, thereby causing the operation unit side body 21 and the display unit to be rotated. The side housing 22 can be in an open state (open state), or the operation unit side housing 21 and the display unit side housing 22 can be folded (folded state). In the present embodiment, the foldable mobile phone 1 is described as a mobile terminal device. However, the foldable mobile phone 1 is not foldable, and the liquid crystal module 60 and the operation unit 24 may be arranged in one housing. A sliding type in which one casing is slid in one direction from a state where both casings 21 and 22 are overlapped, and a rotating type in which one casing is rotated around an axis along the overlapping direction. Alternatively, the housings 21 and 22 may be connected via a biaxial hinge, and the display unit 27 and the operation unit 24 described later may be arranged in one housing.

  As shown in FIG. 1A, the operation unit side body 21 is used with the operation unit 24 disposed on the inner surface 21a that is a surface facing the display unit side body 22 in a folded state, and the use of the mobile phone 1. A voice input unit 23 to which a voice uttered by a person during a call is input, and a battery (not shown) disposed on an outer surface 21b that is a surface opposite to the inner surface 21a. The operation unit 24 includes a function setting operation button 24a for operating various functions such as various settings, a phone book function, and a mail function, and an input operation button 24b for inputting numbers such as telephone numbers and characters such as mail. And a determination operation button 24c for performing determination and scrolling in various operations.

  The display unit side body 22 is in a folded state, a display unit 27 disposed on an inner surface 22a that is a surface facing the operation unit side body 21, a voice output unit 29 that outputs voice on the other side of the call, Is provided. The display unit 27 is a part that is formed on one surface of the liquid crystal module 60 described later and displays various types of information. The liquid crystal module 60 is disposed so that the display unit 27 is exposed from the opening 25 formed in the display unit side body 22.

  FIG. 2 is an exploded perspective view of the display unit side body 22. FIG. 3 is a plan view of the front case 50 viewed from the inside of the housing. FIG. 4 is a perspective view of the sheet metal member 53. As shown in FIG. 2, the display unit side body 22 is in a folded state, a rear case 30 disposed on the side opposite to the operation unit side body 21, a liquid crystal side circuit board 40, and a folded state. A front case 50, a liquid crystal module 60, and a cover 70 are sometimes provided on the operation unit side body 21 side. In the display unit side body 22, the rear case 30, the circuit board 40, the front case 50, the liquid crystal module 60, and the cover 70 are arranged in a stacked manner.

  As shown in FIG. 2, the rear case 30 and the front case 50 are arranged so that their concave inner surfaces face each other, and are joined so that their outer peripheral edges overlap each other. A circuit board 40 having a predetermined wiring pattern is disposed between the rear case 30 and the front case 50. The liquid crystal module 60 is accommodated in the opening 25 formed in the front case 50 shown in FIG. 1 from the inner side surface 22a side of the front case 50. The transparent cover 70 is disposed in a recess formed on the inner side surface 22 a of the front case 50 so as to cover the display unit 27 of the liquid crystal module 60 accommodated in the front case 50.

  As shown in FIGS. 1 and 2, the liquid crystal module 60 includes a display unit 27. The liquid crystal module 60 is accommodated and disposed in the opening 25 of the front case 50 from the outside on the housing side so that the display unit 27 faces (exposes) the outside of the housing.

  As shown in FIGS. 2 and 3, the front case 50 includes a case member 51 formed of a resin material and a sheet metal member 53 fixed to the inside of the case member 51. The front case 50 is obtained by placing a sheet metal member 53 in a predetermined mold when resin molding is performed, and pouring resin that is a material of the case member 51 into insert molding. Thereby, the sheet metal member 53 is integrally fixed to the case member 51 in a state where both end portions in the longitudinal direction and both end portions in the short direction (width direction) are covered with the resin of the case member 51. In other words, the case member 51 is formed with mold portions 55 and 56 that cover both ends of the sheet metal member 53 on both ends in the longitudinal direction of the sheet metal member 53. An opening 57 for exposing the sheet metal member 53 is formed in the mold portion 55. A spring member 150, which will be described later, is inserted into the opening 57 and comes into contact with the surface of the exposed sheet metal member 53. Although not shown, both end portions of the sheet metal member 53 in the short direction are also covered with a mold portion formed on the case member 51.

  As shown in FIGS. 2 to 4, the sheet metal member 53 has a shape in which the outer edge of a planar sheet metal is bent, and has a thin box shape with a wide open surface. Then, stepped steps 102 and 112 are formed at both ends in the longitudinal direction. Specifically, the sheet metal member 53 is formed on the planar planar portion 100 and the stepped portion 102 formed at the both ends in the longitudinal direction of the planar portion 100 and formed in a stepped shape so that the position in the thickness direction is different from the planar portion 100. 112.

  A plurality of convex portions 104a to 104c and 114a to 114c are formed on the step portions 102 and 112 so that a part thereof protrudes in the longitudinal direction. The convex portions 104a to 104c and 114a to 114c are formed at predetermined intervals in the width direction, respectively, and are formed so that the outside in the longitudinal direction is wider than the root portion. The shape is such that the long sides of the trapezoid are arranged outside.

  As shown in FIGS. 2 and 3, the mold parts 55 and 56 are formed so as to cover the step parts 102 and 112, respectively. Specifically, each of the mold parts 55 and 56 is formed so as to cover each of the convex parts 104a to 104c and 114a to 114c, and the resin constituting each of the mold parts 55 and 56 is made of the convex parts 104a to 104c, 114a to 114c are interposed between each individual.

  As described above, since the step portions 102 and 112 that are both ends in the longitudinal direction are covered with the mold portions 55 and 56, the sheet metal member 53 is integrally fixed to the case member 51. The mold parts 55 and 56 are formed so as to cover the convex parts 104a to 104c and 114a to 114c, respectively, and the resin constituting the mold parts 55 and 56 is formed from the convex parts 104a to 104c and 114a. Since the sheet metal member 53 is inserted between the respective portions 114c, the sheet metal member 53 is integrally fixed in such a manner that it is difficult to be pulled out from the case member 51.

  As shown in FIGS. 2 and 3, the mold portion 55 has an opening 57 that exposes a part of the convex portion 104 b constituting the step portion 102 toward the inside of the housing (upper side in FIG. 2). It is formed. The opening 57 has a shape in which a part of the mold part 55 covering the convex part 104b is cut out, and exposes a part of the convex part 104b. A part of a spring member 150, which is a conductive member, which will be described later, is inserted into the opening 57, and comes into contact with the surface of the exposed convex portion 104b.

  Here, the opening portion 57 is formed by cutting out the already formed mold portion 55, or by performing insert molding in a state where a predetermined member is arranged in advance at the position of the opening portion 57 and then removing the predetermined member. be able to.

  Further, as shown in FIGS. 2 to 4, the flat portion 100 of the sheet metal member 53 is formed with a protruding portion 59 that protrudes in the thickness direction (upward direction in FIG. 2). The protrusion 59 directly abuts on a ground portion (not shown) on the circuit board 40. The sheet metal member 53 is electrically connected to the circuit board 40 by the protrusion 59.

  As shown in FIG. 2, the circuit board 40 is accommodated in the front case 50. Specifically, the circuit board 40 is laminated on the flat surface portion 100 of the sheet metal member 53. Then, the circuit board 40 is positioned and fixed by a predetermined support member or the like as will be described later.

  Next, a conduction structure between the sheet metal member 53 and the circuit board 40 will be described. FIG. 5 is a part of a cross-sectional view of the display unit side body 22 for explaining a conductive structure between the sheet metal member 53 and the circuit board 40. As shown in FIG. 5, the circuit board 40 is positioned and fixed in a state where it is supported by the first support member 160 that is a part of the mold part 55 formed so as to cover the step part 102 of the sheet metal member 53. Furthermore, the circuit board 40 is positioned and fixed in a state where the end side is supported by the second support member 170 formed on the case member 51.

  The spring member 150 as a conducting member has one end inserted into the opening 57 and comes into contact with the convex portion 104b of the stepped portion 102 of the sheet metal member 53, and the other end is the surface of the circuit board 40 (the lower surface in FIG. 5). It abuts on the ground part arranged in Thereby, the sheet metal member 53 and the circuit board 40 as the ground member are electrically connected.

  In a normal state, the spring member 150 is disposed between the sheet metal member 53 and the circuit board 40 in an elastically deformed state shorter than the natural length. When the convex portion 104b or the circuit board 40 is deformed (displaced), the spring member 150 is elastically deformed in the thickness direction to follow the deformation (displacement) of the convex portion 104b or the circuit board 40 and is in a conductive state. To maintain.

  According to the present embodiment, since the opening 57 is formed in the region which is hard to be deformed by the molding portion 55 of the case member 51 and the portion where the spring member 150 abuts is provided, the deformation (displacement) of the sheet metal member 53 is achieved. ) Can be prevented from being deteriorated. Further, a spring member 150 as a conducting member is disposed between the circuit board 40 and the convex part 104b of the sheet metal member 53 molded in the mold part 55 formed in the case member 51 that supports the circuit board 40. The That is, since the spring member 150 is disposed between the portions where the relative displacement is relatively small, it is possible to suppress the deterioration of the conductivity between the two.

  In addition, according to the present embodiment, the spring member 150 can be contacted by forming the opening at a predetermined position of the mold portions 55 and 56 formed so as to cover all or part of the outer periphery of the sheet metal member 53. Can be formed. Therefore, the degree of freedom in forming the portion where the spring member 150 contacts the sheet metal member 53 is increased.

  Further, according to the present embodiment, the front case 50 of the display unit side body 22 is configured such that the sheet metal member 53 is integrated with the case member 51 by insert molding, so that the display unit side body 22 has sufficient strength. It is possible to reduce the thickness while ensuring. Therefore, the entire mobile phone 1 can be thinned while ensuring sufficient strength. Further, since the step portion 102 is provided in the sheet metal member 53 and the spring member 150 is brought into contact with the step portion 102, it is necessary to provide a clearance for the conductive member in the thickness direction as in the conductive structure shown in FIG. There is no. Therefore, the display unit side body 22 and the mobile phone 1 can be thinned.

  Further, according to the present embodiment, the convex portions 104a to 104c and the convex portions 114a to 114c constituting the step portions 102 and 112 covered by the mold portions 55 and 56 are wider outside the root portion. Is formed. The shape is such that the long sides of the trapezoid are arranged outside. As a result, the mold parts 55 and 56 are formed so as to cover the convex parts 104a to 104c and 114a to 114c, respectively, and the resin constituting the mold parts 55 and 56 is made of the convex parts 104a to 104c and 114a. To 114c. Therefore, the sheet metal member 53 can be integrally fixed in a manner that is not easily detached from the case member 51.

  Further, as shown in FIG. 7, the conventional sheet metal member 53 </ b> A is formed between a notch 910 and a notch 920, which is a portion where a spring member that is a conductive member abuts. Thus, when a notch is formed in the outer periphery of the sheet metal member 53A, the strength of the sheet metal member 53A decreases. On the other hand, according to the present embodiment, as shown in FIG. 4, it is not necessary to form a notch on the outer periphery of the sheet metal member 53, so that deterioration in strength can be suppressed.

  Further, according to the present embodiment, the circuit board 40 as the ground member is supported by the first support member 160 that is a part of the mold part 55 formed so as to cover the stepped part 102 of the sheet metal member 53. It is fixed by positioning. Further, the circuit board 140 is positioned and fixed in a state where the end side is supported by the second support member 170 formed on the case member 51. This makes it difficult to deform not only the sheet metal member 53 but also the circuit board 40 that is the ground member, so that it is possible to further suppress a decrease in conductivity due to deformation (displacement) of the sheet metal member 53 and the circuit board 40.

  Further, according to the present embodiment, the protrusion 59 formed on the flat surface portion 100 of the sheet metal member 53 and the ground portion of the circuit board 40 as the ground member are brought into direct contact with each other to be electrically connected. . That is, another conduction path different from the conduction by the spring member 150 is provided. Thereby, the certainty in conduction | electrical_connection with the circuit board 40 as a sheet-metal member 53 and a ground member further improves.

  As mentioned above, although preferred embodiment of this form was described, this invention can be implemented with a various form, without being limited to embodiment mentioned above. In the present embodiment, the sheet metal member 53 is disposed in the display unit side body 22, but is not limited thereto, and may be disposed in the operation unit side body 21.

  Moreover, in this embodiment, although the circuit board 40 is made into the ground member, it is not limited to this, Other members may be used. Further, another member as a ground member may be brought into direct contact with the sheet metal member 53 to conduct, or may be conducted with another member as a ground member via a spring member 150 as a conducting member.

  Moreover, in this embodiment, although the spring member 150 is used as a conduction | electrical_connection member, it is not limited to this, You may use another elastic member. Furthermore, since the sheet metal member 53 and the ground member are positioned and fixed in such a manner that they are difficult to deform, a member that does not elastically deform may be used as the conductive member.

  Further, the number of openings 57 formed in the mold part 55 is not limited to one, and a plurality of openings 57 can be formed. The opening 57 can also be formed in the mold part 56. Thereby, it can respond suitably also when using the other ground member in which a ground part is formed in a different position.

(A) The front view of the mobile telephone 1 in one Embodiment of this invention is shown. (B) The side view of the mobile telephone 1 in one Embodiment of this invention is shown. 4 is an exploded perspective view of a display unit side body 22. FIG. FIG. 6 is a plan view of the front case 50 as viewed from the inside of the housing. 5 is a perspective view of the sheet metal member 53. FIG. FIG. 4 is a part of a cross-sectional view of the display unit side body 22 for explaining a conduction structure between the sheet metal member 53 and the circuit board 40. It is the top view which looked at the front case in a well-known mobile phone from the sheet metal member side. It is a perspective view in the sheet metal member of FIG. It is a part of sectional drawing in the display part side housing | casing for demonstrating the well-known conduction | electrical_connection structure in a sheet-metal member and a circuit board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile telephone 21 Operation part side housing | casing 22 Display part side housing | casing 30 Rear case 40 Circuit board 50 Front case 51 Case member 53 Sheet metal member 55 Mold part 56 Mold part 57 Opening part 59 Projection part 60 Liquid crystal module 70 Cover 102 Step part 104a Convex part 104b Convex part 104c Convex part 112 Step part 114a Convex part 114b Convex part 114c Convex part 150 Spring member

Claims (5)

A housing,
A resin case member constituting the housing;
A sheet metal member configured integrally with the case member by insert molding;
A portable terminal device comprising a ground member disposed in the housing,
A conductive member that contacts and electrically conducts the sheet metal member and the ground member;
The case member has a mold part that is formed so as to cover all or part of the outer periphery of the sheet metal member, and an opening that is formed in the mold part and exposes the sheet metal member,
The portable terminal device, wherein the conducting member is inserted into the opening and contacts the sheet metal member.   The portable terminal device according to claim 1, wherein the conducting member is configured by an elastic member that is elastically deformable. The sheet metal member has a stepped step portion formed on the outer periphery,
The mold part is formed so as to cover the step part,
The portable terminal device according to claim 1, wherein the opening portion exposes the stepped portion.   The portable terminal device according to claim 1, wherein the mold part includes a support part that supports the ground member.   5. The mobile terminal device according to claim 1, wherein the sheet metal member includes a contact portion that directly contacts a ground portion of the ground member.

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