JP2009107210A - Case manufacturing method and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a case manufacturing method which enables forming of a resin section on the inner surface side of a side wall part of a sheet metal member and molding of the sheet metal member by giving no rise to deformation of the side wall part, with regard to the case molded through insert molding. <P>SOLUTION: This case manufacturing method is intended for manufacturing the case 31 by forming in a piece the sheet metal member 300 with a flat part 301 and a sheet metal side wall part 302 and a resin member 310 with an inside resin part 312 covering at least, a part of the inner surface side of the sheet metal side wall part 302, using the insert molding process. In addition, a cavity mold 50 with a plurality of pressing parts 52 which project toward the sheet metal side wall part 302 and intermittently come into contact with the inner surface of the sheet metal side wall part 302, is arranged on the inner surface side of the sheet metal member 300. Further, the inside resin part 312 is formed by filling a space 60 formed between the inner surface of the sheet metal side wall part 302 and the cavity mold 50, with a molten resin material, between the two adjacent pressing parts 52. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a case constituting an enclosure of an electronic device and the electronic device.

In recent years, electronic devices such as mobile phones have been required to be thinned. As a countermeasure against rigidity deterioration in a thin mobile phone, it is known that a sheet metal member is insert-molded into a resin outer case constituting the mobile phone casing to ensure the rigidity of the casing ( For example, see Patent Document 1). In insert molding of such an exterior case, a sheet metal member having a flat surface portion and a side wall portion provided on an outer edge of the flat surface portion is disposed between the cavity die and the core die, This is performed by filling a molten resin material into a space formed between the sheet metal members.
Here, in insert molding, in order to prevent a change in the shape of the sheet metal member due to the pressure when the resin material is filled in the space between the mold and the sheet metal member, particularly the deformation of the side wall portion, the inner surface of the sheet metal member is a cavity. It was necessary to support the side wall by contacting the mold. For this reason, the inner surface side of the side wall portion of the sheet metal member cannot be filled with a resin material, and the inner surface of the side wall portion is configured to expose the sheet metal member.
JP 2000-151132 A

  By the way, in order to ensure the rigidity of the mobile phone, the side wall of the casing needs to have a predetermined thickness. However, when a resin portion having a predetermined thickness is formed on the outer surface side of the side wall portion of the sheet metal member, sinking may occur on the surface of the housing due to the thickness of the resin portion, and the appearance may deteriorate. there were. Therefore, by forming the resin portion on the inner surface side of the side wall portion of the sheet metal member, the resin portion formed on the outer surface side of the side wall portion of the sheet metal member is made thin while ensuring a predetermined thickness on the side wall of the housing. Was desired.

Therefore, the present invention can form a resin portion on the inner surface side of the side wall portion of the sheet metal member in a case formed by insert molding, and can prevent deformation of the side wall portion of the sheet metal member during molding. It aims at providing the manufacturing method of.
Another object of the present invention is to provide an electronic device in which sink marks are unlikely to occur on the surface of the housing.

  In the present invention, a sheet metal member having a flat plate portion and a sheet metal side wall portion formed on an outer edge of the flat plate portion, and a resin member having an inner resin portion covering at least a part of the inner surface side of the metal plate side wall portion are formed by insert molding. A method of manufacturing an integrally formed case, wherein a cavity mold is formed on an inner surface side of the sheet metal member and abuts on substantially the entire surface of the planar portion, and protrudes toward the sheet metal side wall portion. A cavity mold provided with a plurality of pressing portions that intermittently abut on the inner surface is disposed, and is formed between the inner surface of the sheet metal side wall portion and the cavity mold between two adjacent pressing portions. It is related with the manufacturing method of the case which forms the said inner side resin part by filling the resin material fuse | melted in the space to be formed.

  Moreover, it is preferable that the said pressing part has a substantially rectangular parallelepiped shape where the shape is long in the height direction of the said sheet metal side wall part.

  Further, the present invention provides a sheet metal member having a planar portion and a sheet metal side wall portion formed on an outer edge of the planar portion, and a resin member that covers at least a part of the sheet metal member, and is integrally formed by insert molding. An electronic device comprising a first case having a housing and a housing having a second case coupled to the first case, wherein the inner side surface of the recess is a sheet metal exposed portion where an inner surface of the sheet metal side wall portion is exposed; The present invention relates to an electronic apparatus having an inner surface of the sheet metal side wall portion and a plurality of inner resin portions covered with the resin member at predetermined intervals.

  The internal member further includes an internal member disposed in the housing, and the internal member has a flexible engaging claw, and the inner resin portion in the first case is engageable with the engaging claw. Preferably, the engaging member has an engaged portion, and the internal member is attached to the housing with the engaging claw engaging the engaged portion in a state of being accommodated in the recess.

  Moreover, it is preferable that the flat part in the sheet metal member is formed with a hole through which the engagement claw can be inserted.

  Moreover, it is preferable that the said housing | casing is further provided with the cover member arrange | positioned at the outer surface side of the said 1st case, and the said cover member can be affixed on the upper surface in the said inner side resin part.

  Moreover, it is preferable that the coupling | bond part which is a position where the said 1st case and the said 2nd case mutually contact is formed in the surface at the said 2nd case side in the said housing | casing.

According to the present invention, the inner surface of the side wall portion of the sheet metal member is provided by using the cavity mold provided with a plurality of pressing portions that protrude toward the side wall portion of the sheet metal member and intermittently contact the inner surface of the side wall portion. A resin part can be formed on the side, and a method for manufacturing a case that can prevent deformation of the side wall part during molding can be provided.
According to the present invention, the resin portion is formed on the outer surface side of the side wall portion of the sheet metal member while ensuring a predetermined thickness on the side wall of the housing by forming the resin portion on the inner surface side of the side wall portion of the sheet metal member. Thus, it is possible to provide an electronic device in which sink marks are unlikely to occur on the surface of the housing.

  The best mode for carrying out the present invention will be described below with reference to the drawings. First, the basic structure of a mobile phone 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 (A), 1 (B), and 2. FIG.

FIG. 1A shows a plan 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 shown in FIG. FIG. 2 is a plan view of the cellular phone 1 as viewed from the display unit rear surface 30b side in a state in which the cellular phone 1 shown in FIG.

As shown in FIG. 1A, FIG. 1B, and FIG. 2, the mobile phone 1 is a foldable mobile phone 1 that has a rectangular and thin operation unit side body 20 and a rectangular shape. A display unit side body 30 as a thin case, and a connecting unit 40 that connects the operation unit side body 20 and the display unit side body 30 are provided.
As shown in FIGS. 1A and 1B, the operation unit side body 20 has an outer surface that is a surface facing the display unit side body 30 in a state in which the mobile phone 1 is folded. The operation unit front case 21 and the operation key group 24 constituting the 20a side and the operation unit rear case 22 constituting the operation unit rear surface 20b side which is the surface opposite to the operation unit surface 20a are mainly configured.

The operation unit front case 21 is configured such that the operation key group 24 is exposed to the operation unit surface 20a. In addition, a voice input unit 23 is formed on the operation unit surface 20a of the operation unit front case 21 to which a voice uttered by the user of the mobile phone 1 during a call is input.
The operation key group 24 includes an input of a function setting operation key 24a for operating various functions such as various settings, a telephone book function, and a mail function, and a numeric keypad for inputting numbers of telephone numbers and characters such as mail. An operation key 24b and a determination operation key 24c for determining various operations and scrolling in the up / down / left / right directions are configured.
The voice input unit 23 is disposed in the vicinity of the end portion on the side opposite to the connecting portion 40 in the longitudinal direction of the operation unit side body 2. That is, the voice input unit 23 is arranged on one end side in the longitudinal direction in the opened state of the mobile phone 1.

  A predetermined function is assigned to each key constituting the operation key group 24 according to the open / closed state of the operation unit side body 20 and the display unit side body 30 and the type of the activated application (key).・ Assign). In the mobile phone 1, when each key constituting the operation key group 24 is pressed by the user, an operation corresponding to the function assigned to each key is executed.

  On the side surface of the operation unit side body 20, for example, an interface for transmitting / receiving data to / from an external device (for example, a host device), a headphone / microphone terminal, an interface of a removable external memory, and a battery for charging A charging terminal is provided.

As shown in FIG. 1A, FIG. 1B, and FIG. 2, the display unit side body 30 has a case according to the present invention in which an outer surface has an opening 31a and a display unit front case 31 as a first case. And a display unit rear case 32 as a second case coupled to the display unit front case 31, and a cover member 33 arranged so as to cover the opening 31a of the display unit front case 31.
In the display unit side body 30, a display unit surface 30 a that is a surface facing the operation unit side body 20 in a state in which the cellular phone 1 is folded is mainly configured by a display unit front case 31 and a cover member 33. Further, the display unit side surface 30 c that is a side surface along the longitudinal direction of the display unit side body 30 is configured mainly by the display unit front case 31. The display unit back surface 30b, which is the surface opposite to the display unit surface 30a, is configured with the display unit rear case 32 as a main component.

  A main liquid crystal module 34 as an internal member for displaying various kinds of information is disposed in the display unit side body 30. The main liquid crystal module 34 has a main display unit 34a provided on one surface thereof, and the front of the display unit. It arrange | positions so that it may expose to the display part surface 30a from the opening part 31a formed in the case 31. FIG. In addition, the display unit front case 31 is formed with an audio output unit 31b that outputs audio on the other party of the call. The audio output unit 31 b is disposed on the end side opposite to the connection unit 40 in the longitudinal direction of the display unit side body 30. That is, the audio output unit 31 b is disposed in the vicinity of the end on the display unit side body 30 side in the open state of the mobile phone 1.

  As shown in FIG. 2, a sub liquid crystal module 36 for displaying various types of information is disposed on the display unit rear case 32 side of the display unit side body 30, and the sub liquid crystal module 36 is provided on one surface thereof. The sub display unit 36a thus arranged is arranged so as to be exposed to the display unit rear surface 30b through the display unit rear case 32. Each of the main liquid crystal module 34 and the sub liquid crystal module 36 includes a liquid crystal panel constituting the main display section 34a and the sub display section 36a, a driving circuit for driving the liquid crystal panel, and a back surface for irradiating light from the back side of the liquid crystal panel. And a light source unit such as a light.

  As shown in FIG. 1A, the upper end portion of the operation unit side body 20 and the lower end portion of the display unit side body 30 are connected to each other via a connection unit 40 so as to be opened and closed. The mobile phone 1 relatively rotates (turns) the operation unit side body 20 and the display unit side body 30 connected via the connection unit 40, so that the operation unit side body 20 and the display unit are rotated. The side housing 30 can be in an open state (open state), or the operation unit side housing 20 and the display unit side housing 30 can be folded (folded state).

Next, the internal structure of the display unit side body 30 will be described with reference to FIGS.
FIG. 3 is a diagram illustrating a state in which the display unit side body 3 is viewed from the display unit back surface 30b side in the exploded perspective view of the display unit side body 30. FIG. FIG. 4 is a diagram illustrating a state in which the display unit side body 3 is viewed from the display unit surface 30a side in a partially exploded perspective view of the display unit side body 30. FIG. 5 is a cross-sectional view taken along line XX in FIG. 6 is a cross-sectional view taken along line YY in FIG.

  As shown in FIG. 3, the display unit side body 30 includes a display unit rear case 32, a sub liquid crystal module 36, a circuit board 35, a display unit front case 31, a main liquid crystal module 34, and a cover member 33. It is equipped with. In the display unit side body 30, the display unit rear case 32, the sub liquid crystal module 36, the circuit board 35, the display unit front case 31, the main liquid crystal module 34, and the cover member 33 are arranged in a stacked manner. Is done.

  As shown in FIG. 3, the display unit front case 31 and the display unit rear case 32 are arranged so that the concave inner surfaces face each other, and the coupling unit 37 that is in contact with both is provided on the display unit rear surface 30 b side. (See FIG. 2). Specifically, as shown in FIG. 3, the display unit front case 31 constitutes a region excluding the region where the cover member 33 is disposed on the display unit surface 30 a and extends in the longitudinal direction of the display unit side body 30. The display part side surface 30c which is a side surface is comprised. On the other hand, the display unit rear case 32 constitutes most of the display unit back surface 30b in the display unit side body 30 and covers the end side opposite to the connecting unit 40 in the longitudinal direction of the display unit side body 30. It constitutes most of the upper side surface 30d.

  By combining the display unit front case 31 and the display unit rear case 32 having such a configuration, the connecting unit 37 of both is in the vicinity of the boundary between the display unit side surface 30c and the display unit back surface 30b on the display unit back surface 30b side. It is formed. The coupling portion 37 is formed so as to extend in the longitudinal direction of the display unit side body 30 in the vicinity of the boundary between the display unit side surface 30c and the display unit rear surface 30b on the display unit rear surface 30b side. That is, the connecting portion 37 between the display unit front case 31 and the display unit rear case 32 is not formed on the display unit side surface 30c.

  As shown in FIG. 3, the sub liquid crystal module 36 is disposed between the display unit rear case 32 and the display unit front case 31 so that the sub display unit 36a is exposed through the display unit rear case 32. The circuit board 35 is disposed so as to surround the periphery of the sub liquid crystal module 36. A sheet metal member 300 constituting the display unit front case 31 is disposed on the side of the circuit board 35 and the sub liquid crystal module 36 opposite to the surface on which the sub display unit 36a is provided. That is, the sub liquid crystal module 36 and the circuit board 35 are disposed between the display unit rear case 32 and the sheet metal member 300 in the display unit front case 31.

The circuit board 35 supplies power to the main liquid crystal module 34 and the sub liquid crystal module 36. Various electronic components are arranged on the circuit board 35, and a reference potential pattern layer (not shown) is formed as a reference potential portion.
The reference potential pattern layer is disposed on the display unit surface 30 a side of the circuit board 35. The circuit board 35 is provided with a substrate opening 35a having a shape corresponding to the outer shape of the sub liquid crystal module 36, and the sub liquid crystal module 36 is disposed in the substrate opening 35a (see FIG. 3).

  As shown in FIGS. 3 to 6, the display unit front case 31 is configured by integrally forming a metal sheet metal member 300 and a resin member 310 covering at least a part of the sheet metal member 300 by insert molding. ing. In the display unit front case 31, one surface of the frame-shaped resin member 310 is covered with the sheet metal member 300, and a recess 31c having an opening 31a is formed on the other side.

  The sheet metal member 300 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. Specifically, as shown in FIGS. 5 and 6, the sheet metal member 300 includes a planar planar portion 301, and a sheet metal side wall portion 302 that is formed at the periphery of the planar portion 301 and stands substantially perpendicularly from the planar portion 301. Is provided.

A sheet metal opening 304 that is a hole is formed in the vicinity of the boundary between the planar portion 301 and the sheet metal side wall portion 302 (see FIGS. 4 and 6). As shown in FIG. 4, a plurality of sheet metal openings 304 are formed in the vicinity of the side edge along the longitudinal direction of the sheet metal member 300. An engagement claw 341 in the main liquid crystal module 34 described later is inserted through the sheet metal opening 304.
As shown in FIG. 3, the flat portion 301 is formed with a protrusion 303 protruding toward the circuit board 35 in the thickness direction. The protrusion 303 is in contact with a reference potential pattern layer (not shown) on the circuit board 35. The sheet metal member 300 is electrically connected to the circuit board 35 by the protrusion 303.

As shown in FIGS. 4 to 6, the resin member 310 has a frame shape formed so as to cover the sheet metal side wall portion 302 provided on the periphery of the sheet metal member 300.
The resin member 310 includes an outer resin part 311 covering the outer surface side of the sheet metal side wall part 302, a plurality of inner resin parts 312 covering the inner surface side of the sheet metal side wall part 302, and two inner resin parts adjacent to each other on the inner surface of the sheet metal side wall part. And a sheet metal exposed portion 313 formed between 312 and 312.
That is, the inner surface of the recess 31c of the display unit front case 31 includes a sheet metal exposed portion 313 where the inner surface of the sheet metal side wall portion 302 is exposed, and a plurality of the inner surfaces of the sheet metal side wall portion 302 covered with the resin member 310 with a predetermined interval. Inner resin part 312.

As shown in FIG. 4, a plurality of inner resin portions 312 are formed at predetermined intervals in the longitudinal direction on the inner surface side of the sheet metal side wall portion 302 provided along the longitudinal direction of the display unit front case 31. As shown in FIGS. 5 and 6, each of the inner resin portions 312 is formed so as to protrude inward in the width direction from the inner surface of the sheet metal side wall portion 302.
As shown in FIGS. 5 and 6, the inner resin portion 312 is formed to be higher than the upper end portion of the sheet metal side wall portion 302. That is, the resin member 310 covers the outer surface, the inner surface, and the upper surface of the sheet metal side wall portion 302 in the portion having the inner resin portion 312.

  The thickness of the inner resin portion 312 (the protruding length of the inner resin portion 312 from the inner surface of the sheet metal side wall portion 302) is a predetermined height in the vicinity of the upper end portion of the inner resin portion 312 as shown in FIGS. In, it is comprised by the substantially constant thickness. Further, in the vicinity of the central portion located below the vicinity of the upper end portion of the inner resin portion 312, the thickness of the inner resin portion 312 is configured to gradually increase downward. In the vicinity of the lower end portion located below the vicinity of the central portion of the inner resin portion 312, the thickness of the inner resin portion 312 is again configured to be substantially constant.

As shown in FIG. 5, the lower end portion of the inner resin portion 312 is in contact with the flat portion 301 of the sheet metal member 300.
Further, in the portion where the sheet metal opening 304 is provided in the flat portion 301, a space is formed below the lower end portion of the inner resin portion 312 as shown in FIG. Constitutes an engaged portion 312a to which an engaging claw 341 provided in a main liquid crystal module 34 described later can be engaged.

The sheet metal exposed portion 313 is formed between two adjacent inner resin portions 312 and 312. As shown in FIG. 4, on the inner surface side of the sheet metal side wall portion 302 provided along the longitudinal direction of the display unit side body 30, the inner resin portion 312 and the sheet metal exposed portion 313 are alternately arranged in the longitudinal direction. Is provided.
In the sheet metal exposed portion 313, the sheet metal sidewall portion 302 is not covered with the resin member 310, and the inner surface of the sheet metal sidewall portion 302 is exposed. Further, the sheet metal exposed portion 313 is configured such that the inner surface of the sheet metal side wall portion 302 is exposed from the lower end to the upper end. The width of the sheet metal exposed portion 313 is configured to be smaller than the length of the sheet metal side wall portion 302 in the height direction. That is, the shape of the exposed surface in the sheet metal exposed portion 313 is formed in a substantially rectangular shape that is long in the height direction of the sheet metal side wall portion 302. Further, the width of the sheet metal exposed portion 313 is configured to be smaller than the width of the inner resin portion 312.

  The outer resin portion 311 covers substantially the entire circumference of the outer surface of the sheet metal side wall portion 302 and constitutes the outer shape of the display unit front case 31.

  As shown in FIGS. 5 and 6, a resin upper surface portion 314 having a surface substantially horizontal to the flat portion 301 of the sheet metal member 300 is formed on the upper surface of the resin member 310. The resin upper surface portion 314 is formed continuously from the inner resin portion 312 side to the outer resin portion 311 side.

  As shown in FIG. 4, the main liquid crystal module 34 is accommodated in the recess 31 c of the display unit front case 31 from an opening 31 a formed on the display unit surface 30 a side of the display unit front case 31. The main liquid crystal module 34 is a rectangular plate-like member, and has a main display portion 34a on one surface. On both side edges along the longitudinal direction of the main liquid crystal module 34, a plurality of engaging claws 341 are formed so as to protrude on the surface opposite to the main display portion 34a. The main liquid crystal module 34 is engaged with the recessed portion 31 c of the display unit front case 31 by engaging a plurality of engaging claws 341 with an engaged portion 312 a formed by a part of the inner resin portion 312 in the display unit front case 31. Fixed placement. The inner resin portion 312 constituting the engaged portion 312a is provided in a portion of the sheet metal member 300 where the sheet metal opening 304 is formed in the flat portion 301, and the main liquid crystal module 34 is disposed in the recess 31c of the display unit front case 31. When being accommodated, the engaging claw 341 is engaged with the engaged portion 312a while being inserted through the sheet metal opening 304.

  On the display unit surface 30 a side of the main liquid crystal module 34, a cover member 33 made of a transparent member is disposed so as to cover the main display unit 34 a of the main liquid crystal module 34. The cover member 33 has a shape that is slightly larger than the opening 31 a of the display unit front case 31. The cover member 33 and the display unit front case 31 are formed such that the periphery of the cover member 33 is formed at the periphery of the opening 31a in the display unit front case 31, and the upper surface of the inner resin portion 312 and the upper surface of the outer resin portion. The resin upper surface portion 314 is attached and fixed.

Next, a preferred method for manufacturing the display unit front case 31 in the mobile phone 1 according to the present embodiment will be described with reference to FIGS.
FIG. 7 is a diagram illustrating a manufacturing state of the display unit front case 31 illustrated in FIG. 4, and is a diagram illustrating a manufacturing state of a cross-sectional portion taken along the line XX in FIG. 4. FIG. 8 is a diagram illustrating a manufacturing state of the display unit front case 31 illustrated in FIG. 4, and is a diagram illustrating a manufacturing state of a YY line cross-sectional portion in FIG. 4. FIG. 9 is a diagram illustrating a manufacturing state of the display unit front case 31 illustrated in FIG. 4, and is a diagram illustrating a manufacturing state of a ZZ line cross-sectional portion in FIG. 4. FIG. 10 is a diagram illustrating a manufacturing state of the display unit front case 31 illustrated in FIG. 4, and is a diagram illustrating a manufacturing state in a horizontal section in a portion illustrated in A of FIG. 4.

  The display unit front case 31 of this embodiment is formed by insert molding. As shown in FIGS. 7 to 10, a sheet metal member 300 is disposed between the cavity mold 50 and the core mold 51, and the cavity is formed. The sheet metal member 300 and the resin member 310 are integrally formed by filling a molten resin material into a space formed between the mold 50 and the core mold 51 and the sheet metal member 300.

  As shown in FIGS. 7 to 9, the cavity mold 50 is disposed so as to contact substantially the entire inner surface of the flat surface portion 301 of the sheet metal member 300. Further, as shown in FIG. 10, the cavity mold 50 has a shape protruding toward the sheet metal side wall portion 302, and the inner surface of the sheet metal side wall portion 302 when the sheet metal member 300 is disposed on the cavity mold 50. A pressing portion 52 is formed in contact with the. A plurality of the pressing portions 52 are intermittently formed at predetermined intervals. And between two adjacent pressing parts 52 and 52, the inner side resin part formation space 60 which is a space where the cavity metal mold | die 50 and the inner surface of the sheet metal side wall part 302 do not contact | abut is formed.

  As shown in FIG. 9, the pressing portion 52 is in continuous contact with the inner surface of the sheet metal side wall portion 302 from the lower end to the upper end. The shape of the contact surface between the pressing portion 52 and the sheet metal side wall portion 302 has a substantially rectangular shape that is long in the height direction of the sheet metal side wall portion 302. The pressing portion 52 has a substantially rectangular parallelepiped shape that is long in the height direction of the sheet metal side wall portion 302.

  As shown in FIGS. 7 to 9, the core mold 51 is in contact with substantially the entire area of the outer surface of the flat portion 301 in the sheet metal member 300. The outer surface of the sheet metal side wall 302 is not in contact with the cavity mold 50 and the core mold 51, and the display unit front surface is between the outer surface of the sheet metal sidewall 302 and the cavity mold 50 and the core mold 51. A space portion having a shape corresponding to the shape of the case 31 is formed.

  As shown in FIGS. 7 to 9, a resin filling port 53 is formed in the cavity mold 50. After the sheet metal member 300 is disposed between the cavity mold 50 and the core mold 51, the cavity mold 50 is formed. An inner resin portion forming space 60 formed between the mold 50 and the sheet metal side wall portion 302, and a space portion having a predetermined shape formed between the cavity mold 50 and the core mold 51 and the sheet metal member 300. The molten resin material is filled from the resin filling port 53. The inner resin portion 312 is formed from the resin material filled in the inner resin portion forming space 60, and the sheet metal exposed portion 313 is formed at the portion where the sheet metal side wall portion 302 and the cavity mold 50 are in contact by the pressing portion 52. The

After the resin material filled from the resin filling port 53 is cooled and solidified, the cavity mold 50 and the core mold 51 are moved in the vertical direction, which is the height direction of the sheet metal side wall, and are insert-molded. The front case 31 is removed from the cavity mold 50 and the core mold 51.
In this way, the sheet metal member 300 and the resin member 310 are integrally molded, and the inner resin portion 312 and the sheet metal exposed portion 313 are formed on the inner surface side of the sheet metal side wall portion 302. Is manufactured.

  According to the manufacturing method of the display unit front case 31 of the present embodiment described above, the sheet metal side wall portion 302 in the sheet metal member 300 is supported by the pressing portion 52 of the cavity mold 50 at a predetermined interval and adjacent to each other. Since the inner resin portion forming space 60 is formed between the two pressing portions 52, 52, the inner resin portion 312 can be formed on the inner surface side of the sheet metal side wall portion 302, and the mold and the sheet metal member 300 are formed. When the molten resin material is filled in the space formed between the two, the deformation of the sheet metal side wall portion 302 due to the heat or pressure of the filled resin material can be prevented.

  The shape of the pressing portion 52 formed in the cavity mold 50 has a substantially rectangular parallelepiped shape that is long in the height direction of the sheet metal side wall portion 302. For this reason, when the display unit front case 31 is removed from the mold by moving the cavity mold 50 in the vertical direction after filling the resin material, the display unit front case 31 is removed due to the shape of the pressing unit 52. The display unit front case 31 of the present embodiment can be easily manufactured without being hindered.

  Further, according to the mobile phone 1 of the present embodiment having the above-described configuration, the inner resin portion 312 is formed on the inner surface side of the sheet metal side wall portion 302, thereby ensuring a predetermined thickness on the side wall of the display unit side body 30. However, the thickness of the outer resin portion 311 formed on the outer surface side of the sheet metal side wall portion 302 can be reduced. Accordingly, sink marks are unlikely to occur on the surface of the display unit side surface 30 c in the display unit side body 30 due to the thickness of the outer resin part 311.

  In particular, by forming the connecting portion between the display unit front case 31 and the display unit rear case 32 on the display unit rear surface 30b side, the thickness of the resin member 310 on the display unit side surface 30c of the display unit side body 30 is increased. Even in this case, by forming the inner resin portion 312, the thickness of the outer resin portion 311 can be reduced while ensuring the thickness of the display portion side surface 30 c, and the occurrence of sink marks on the surface of the display portion side housing 30 is prevented. Can be prevented.

  In addition, since the inner resin portion 312 partially constitutes the engaged portion 312a, the inner resin portion 312 is provided in the main liquid crystal module 34 when the main liquid crystal module 34 is accommodated in the concave portion 31c of the display unit front case 31. The engagement with the engagement claws 341 can be easily performed without providing a separate member or the like.

In addition, a sheet metal opening 304 into which the engaging claw 341 can be inserted is formed in the flat surface portion 301 of the sheet metal member 300 in the vicinity of the portion where the engaged portion 312a constituted by a part of the inner resin portion 312 is provided. Therefore, the engaged portion 312a and the engaging claw 341 can be engaged more smoothly.
Further, since the inner resin portion 312 has a shape in which the thickness gradually increases from the upper side to the lower side, when the main liquid crystal module 34 is accommodated in the concave portion 31 c of the display unit front case 31, 341 and the engaged portion 312a can be engaged more smoothly.

  In addition, since the cover member 33 can be attached to the upper surface of the inner resin portion 312 and disposed, the size of the cover member 33 can be reduced.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above.
For example, the inner resin portion 312 and the sheet metal exposed portion 313 are formed in the sheet metal side wall portion 302 provided along the longitudinal direction of the display unit front case 31 in the present embodiment. You may form in the sheet metal side wall part 302 provided along the width direction.

  Further, in the present embodiment, the cellular phone 1 that can be folded by the connecting portion 40 is described, but it is not a foldable type, and the operation unit side body 20 and the display unit side body 30 are overlapped. The mobile phone may be a slide type mobile phone in which one casing is slid in one direction. Further, it may be a rotary (revolver) mobile phone in which one case is rotated around an axis line along the overlapping direction of the operation unit side case 20 and the display unit side case 30.

FIG. 1A is a plan view of a mobile phone that is an embodiment of the present invention, and FIG. 1B is a side view of the mobile phone that is an embodiment of the present invention. FIG. 1B is a plan view of the mobile phone viewed from the back side of the display unit in a state where the mobile phone shown in FIG. 1A is folded. It is a figure which shows the state which looked at the display part side housing | casing from the display part rear case side in the disassembled perspective view of a display part side housing | casing. It is a figure which shows the state which looked at the display part side housing | casing from the display part surface side in the partial exploded perspective view of a display part side housing | casing. The XX sectional view taken on the line in FIG. 4 is shown. FIG. 6 is a cross-sectional view taken along line YY in FIG. 4. It is a figure which shows the manufacture state of the display part front case shown in FIG. 4, and is a figure which shows the manufacture state of the XX line cross-section part in FIG. It is a figure which shows the manufacture state of the display part front case shown in FIG. 4, and is a figure which shows the manufacture state of the YY sectional view part in FIG. It is a figure which shows the manufacture state of the display part front case shown in FIG. 4, and is a figure which shows the manufacture state of the ZZ line | wire cross-section part in FIG. FIG. 10 is a diagram illustrating a manufacturing state of the display unit front case illustrated in FIG. 4, and is a diagram illustrating a horizontal cross section in a manufacturing state of a portion illustrated in A of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 20 Operation part side case 30 Display part side case (housing)
31 Display unit front case (case, first case)
32 Display unit rear case (second case)
33 Cover member 34 Main liquid crystal module (internal member)
35 Circuit board 36 Sub liquid crystal module 37 Coupling part 40 Coupling part 50 Cavity mold 51 Core mold 52 Pressing part 53 Resin filling port 60 Inner resin part formation space (space)

Claims (7)

A sheet metal member having a flat plate portion and a sheet metal side wall portion formed on the outer edge of the flat portion and a resin member having an inner resin portion covering at least a part of the inner surface side of the metal plate side wall portion are integrally formed by insert molding. A method of manufacturing a case, comprising:
On the inner surface side of the sheet metal member, there are provided a plurality of pressing portions that are cavity molds that contact substantially the entire surface of the flat surface portion and project toward the sheet metal side wall portion and intermittently contact the inner surface of the sheet metal side wall portion. The cavity resin mold is disposed, and the inner resin is filled with a molten resin material in a space formed between the inner surface of the sheet metal side wall and the cavity mold between two adjacent pressing parts. Manufacturing method of case which forms part.   The method of manufacturing a case according to claim 1, wherein the pressing portion has a substantially rectangular parallelepiped shape whose shape is long in a height direction of the sheet metal side wall portion. A sheet metal member having a flat plate portion and a sheet metal side wall portion formed on an outer edge of the flat plate portion, and a first case having a recess formed integrally by insert molding with a resin member covering at least a part of the sheet metal member; and An electronic device comprising a housing having a second case coupled to the first case,
The inner surface of the recess has a sheet metal exposed portion where an inner surface of the sheet metal side wall portion is exposed, and a plurality of inner resin portions whose inner surfaces are covered with the resin member at predetermined intervals. Electronic equipment. Further comprising an internal member disposed within the housing;
The inner member has a flexible engaging claw, and the inner resin portion in the first case has an engaged portion to which the engaging claw can be engaged,
The electronic device according to claim 3, wherein the internal member is attached to the housing with the engaging claw engaging the engaged portion in a state of being accommodated in the concave portion.   The electronic device according to claim 4, wherein a hole portion through which the engaging claw can be inserted is formed in the flat portion of the sheet metal member. The housing further includes a cover member disposed on an outer surface side of the first case,
The electronic device according to claim 3, wherein the cover member is configured to be affixable to an upper surface of the inner resin portion.   7. The housing according to claim 3, wherein a coupling portion that is a position where the first case and the second case are in contact with each other is formed on a surface of the housing on the second case side. Electronic equipment.

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