JP2010252224A - Mobile terminal, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal having a waterproof structure wherein packing mounted to a groove part formed on an end face of a first housing is pressed by a packing pressing surface of a second housing, and a method of manufacturing the same. <P>SOLUTION: The end face 21a of the first housing 21 and the packing pressing surface 28a of the second housing 28 have a space (c) with the packing 25 mounted to the groove part 22 formed on the end face 21a of the first housing 21 pressed by the packing pressing surface 28a of the second housing 28; a cutout part includes a structure located in the space; thereby the packing is surely and easily mounted in a stable state without causing twisting, falling or displacement in the groove part of the first housing regardless of presence of a burr produced by a cutting part of a die in packing manufacture and the size of the burr; and waterproof quality and assembly workability are improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable terminal device having a waterproof structure in which a packing attached to a groove formed on an end surface of a first casing is pressed by a packing pressing surface of a second casing, and a method for manufacturing the portable terminal apparatus. is there.

  As a waterproof structure of a conventional electronic device, a waterproof packing in which a core made of a plastic member is embedded in the inner center of an elastic body having an approximately elliptical cross section is fitted into an annular groove formed on a mating surface of a back-side case of a two-part structure. It is known that a part that is fitted and is pressed against a portion protruding from the upper opening of the annular groove with a mating surface of the front case (see, for example, Patent Document 1).

  In addition, as a method of attaching a dust-proof packing member (seal) in a conventional portable terminal device, a double-sided adhesive sheet is formed in the same shape and size as the LCD panel, and the dust-proof packing member is adhered to one end surface of the double-sided adhesive layer, A two-layer structure in which a double-sided adhesive layer and a dustproof packing member are integrated is known.

  This dust-proof packing member is not required after forming a notch (slit) to separate areas other than those used as double-sided adhesive layer and dust-proof packing member as unnecessary areas and pasting the double-sided adhesive sheet on the LCD panel The unnecessary area is removed by separating the boundary line. Thereby, the operation of attaching the dustproof packing member can be performed easily and reliably (for example, see Patent Document 2).

Japanese Utility Model Publication No. 5-59885 JP 2008-109495 A

  However, the waterproof packing of the conventional electronic device described in Patent Document 1 is attached by attaching both end faces to each other after cutting a predetermined length of an extruded product in which a core made of a plastic member is embedded in the center of an elastic member This is formed by forming into the shape of the target annular groove, and the cost for manufacturing the parts is high due to end face bonding and forming.

  Moreover, in order to maintain the shape after forming, a core made of a plastic member having an appropriate strength is required, and the surrounding area is covered with an elastic member, so that the cross-sectional shape of the waterproof packing becomes large, and the mating surface of the two-part structure Therefore, there is a problem that it is necessary to widen the width of the apparatus, which is an adverse effect of downsizing the apparatus.

  Moreover, the dust-proof packing member of the conventional portable terminal device described in Patent Document 2 is specifically configured to affix a planar seal, and in the case where the packing is attached to the annular groove as in Patent Document 1. The shape and configuration are different from the waterproof packing. For this reason, a method like patent document 2 cannot be applied as it is in the case of patent document 1.

  Specifically, if the method as in Patent Document 2 is applied as it is in the case of Patent Document 1, a burr is generated at the position of the cut-off part or the parting part, which is a trace from which the torsion prevention part is cut off. In such a case, the waterproof packing may be twisted or fall down due to burrs during assembly, and reliable waterproofing may not be possible.

  The present invention has been made in order to solve such a conventional problem. The cross-sectional shape of the packing is small, and the burrs at the positions of the cut-off portions or the split portions where the torsion preventing portions are cut off are provided. A portable terminal device having a waterproof structure capable of reliably and easily mounting a packing in the groove of the first housing in a stable state regardless of the occurrence of occurrence and the size of burrs, and improving the waterproof quality and the assembling workability. It is another object of the present invention to provide a method for manufacturing a mobile terminal device.

  The portable terminal device of the present invention is a portable terminal device having a waterproof structure that presses the packing attached to the groove formed on the end surface of the first casing with the packing pressing surface of the second casing. , Having a cut-out portion that is a mark formed by cutting off the twist prevention portion, etc., and the cut-out portion protrudes from the end surface of the first housing in a state where the packing is attached to the groove formed on the end surface of the first housing. It has the composition in the position.

  With this configuration, regardless of the presence or absence of burrs and the size of the burrs, the packing can be securely and easily mounted in a stable state without causing twisting, falling, or misalignment in the groove of the first housing, and is inexpensive. The packing can improve waterproofing quality and improve assembly workability.

  Further, in the mobile terminal device of the present invention, the cutout portion is formed in the first casing in a state where the packing attached to the groove formed on the end surface of the first casing is pressed by the packing pressing surface of the second casing. It has what has the structure which exists in the position protruded from the end surface.

  In addition, the portable terminal device of the present invention is configured so that the packing attached to the groove formed on the end surface of the first housing is pressed by the packing pressing surface of the second housing with the end surface of the first housing. The packing pressing surface of the second housing has a gap, and the cutout portion includes a structure that is located between the gaps.

  Furthermore, the mobile terminal device of the present invention is a mobile terminal device having a waterproof structure that presses the packing attached to the groove formed on the end surface of the first housing with the packing pressing surface of the second housing, The packing has a split part, and the split part protrudes from the end face of the first casing in a state where the packing is mounted in a groove formed on the end face of the first casing. It has the structure which has the waterproof structure characterized by being in.

  With this configuration, regardless of the presence or absence of burrs and the size of the burrs, the packing can be securely and easily mounted in a stable state without causing twisting, falling, or misalignment in the groove of the first housing, and is inexpensive. The packing can improve waterproofing quality and improve assembly workability.

  In the portable terminal device of the present invention, the mold part is in a state where the packing attached to the groove formed on the end surface of the first casing is pressed by the packing pressing surface of the second casing. Including those in a position protruding from the end face of the first casing.

  In the portable terminal device of the present invention, the first casing is in a state where the packing attached to the groove formed on the end surface of the first casing is pressed by the packing pressing surface of the second casing. There is a gap between the end surface of the second casing and the packing pressing surface of the second casing, and the mold part includes one located between the gaps.

  The method for manufacturing a portable terminal device according to the present invention is a method for manufacturing a portable terminal device in which a packing attached to a groove formed on an end surface of a first housing is pressed by a packing pressing surface of a second housing, The packing includes a twist preventing portion connected by a thin wall portion, the step of attaching the packing to the groove formed on the end surface of the first housing, and the packing in the groove formed on the end surface of the first housing. And a step of cutting off the torsion preventing portion with a thin portion located at a position protruding from the end surface of the first housing in a state where is attached.

  With this configuration, regardless of the presence or absence of burrs and the size of the burrs, the packing can be securely and easily mounted in a stable state without causing twisting, falling, or misalignment in the groove of the first housing, and is inexpensive. The packing can improve waterproofing quality and improve assembly workability.

  In addition, in the method for manufacturing the portable terminal device according to the present invention, the packing attached to the groove formed on the end surface of the first casing is pressed on the packing pressing surface of the second casing. Including one having a step of cutting off the twist preventing portion at a position protruding from the end face.

  In addition, in the method for manufacturing the portable terminal device according to the present invention, the packing attached to the groove formed on the end surface of the first casing is pressed on the packing pressing surface of the second casing. The end surface and the packing pressing surface of the second casing have a gap, and include a step having a step of cutting off a twist preventing portion located between the gap.

  The portable terminal device according to the present invention can be securely and easily mounted in a stable state without causing twisting, falling, or misalignment in the groove of the first housing regardless of the presence or absence of burr and the size of the burr. It is possible to improve the waterproof quality and the assembly workability with an inexpensive packing.

  Furthermore, the manufacturing method of the portable terminal device according to the present invention is in a stable state without causing twisting, falling, or misalignment of the packing in the groove of the first housing regardless of the presence or absence of burr and the size of the burr. It can be installed reliably and easily, and it is possible to improve the waterproof quality and the assembling workability with an inexpensive packing.

(A) Front view showing a state in which the foldable mobile phone according to Embodiment 1 of the present invention is folded (b) Front view showing a state in which the mobile phone is opened with a first hinge. Schematic perspective view of the groove formed on the end surface of the first housing and the packing (A) AA sectional view of FIG. 2 (b) B portion enlarged view of FIG. 3 (a) (A) Schematic cross-sectional view at the start of packing pressing (b) Schematic cross-sectional view at the end of packing pressing The typical perspective view of the groove part and packing which were formed in the 1st housing | casing in Embodiment 2 of this invention. (A) DD sectional view of FIG. 5 (b) Enlarged view of portion E of FIG. 6 (a) (A) Schematic cross-sectional view at the start of packing pressing (b) Schematic cross-sectional view at the end of packing pressing

  Hereinafter, a portable terminal device and a method of manufacturing a portable terminal device according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a foldable mobile phone is used as the mobile terminal device.

(Embodiment 1)
FIG. 1 is a diagram showing a foldable mobile phone according to Embodiment 1 of the present invention.

  FIG. 1A is a front view showing a state in which the foldable mobile phone 10 is folded, and a sub display unit 11 including a liquid crystal display panel or an electroluminescence display panel is provided.

  FIG. 1B is a front view showing a state in which the foldable mobile phone 10 is opened by the first hinge 12. An operation unit 13 such as a numeric keypad is provided on one housing side, and a liquid crystal display is provided on the other housing side. A main display unit 14 including a panel or an electroluminescence display panel is provided.

  Each casing is substantially rectangular, and includes a first casing that forms a front case and a second casing that forms a rear case. Since the casing structure is not the object of the present invention, the description thereof is omitted.

  FIG. 2 is a schematic perspective view of a groove and a packing (waterproof packing) formed on the end surface of the first housing.

  In FIG. 2, a packing 25 formed of an elastic member in the same shape as the planar shape of the groove 22 is attached to the groove 22 formed in a concave shape that is annular or continuous with the first housing 21. The groove portion may be formed in the rib of the first housing 21.

  FIG. 3 is a sectional view and a partially enlarged view of the packing.

  Fig.3 (a) is AA sectional drawing of FIG. 2, and shows the cross-sectional shape of packing. The packing 25 has a symmetric cross-sectional shape formed by a molding method such as injection molding, and the bottom surface of the groove 22 (22a in FIG. 4) when the packing 25 is attached to the groove 22 formed in the first housing 21. A bottom portion 25a that contacts the upper portion, a shoulder portion 25b corresponding to a split portion that divides the molding die in the vertical direction at the maximum width portion of the packing 25, and a packing 25 that is mounted in the groove portion 22 It has the top part 25c which contacts a packing press surface first, when pressing with a press surface (not shown).

  FIG.3 (b) shows the enlarged view of the B section of Fig.3 (a). Although there is a difference in size between the mold part that divides the molding die in the vertical direction (corresponding to the position of the shoulder part 25b of the packing 25), a burr 25d is structurally generated in the mold split direction, and the size of the burr 25d is large. Increases in proportion to the wear of the mold.

  FIG. 4 is a schematic cross-sectional view showing when the packing is pressed and when the pressing is finished.

  Fig.4 (a) shows typical sectional drawing at the time of the press start of packing. The bottom 25a of the packing 25 is in contact with the bottom surface 22a of the groove 22 in a state where the packing 25 formed of an elastic member is attached to the groove 22 formed in a concave shape continuously with the end surface 21a of the first housing 21. A part of the side surface of the packing 25 is in contact with or close to the entrance portion of the groove portion 22, and the packing 25 is mounted in a stable state.

  At this time, the shoulder 25 b where the burr 25 d of the packing 25 is generated is located at a position protruding from the end surface 21 a of the first housing 21.

  When the pressing of the packing 25 is started, the top portion 25c of the packing 25 attached to the groove portion 22 first comes into contact with the packing pressing surface 28a of the second housing 28, and when the pressing further proceeds, the packing 25 starts elastic deformation. To do.

  FIG. 4B shows a schematic cross-sectional view at the end of pressing of the packing. FIG. 4B shows a state in which pressure is applied until the stoppers (not shown) of the first casing 21 and the second casing 28 come into contact with the end surface 21a of the first casing 21 and the first casing 21. A gap (c) between the second casing 28 and the packing pressing surface 28a is maintained at a predetermined interval.

  At this time, the shoulder 25b where the burr 25d of the packing 25 is generated is between the gap (c) formed by the end surface 21a of the first housing 21 and the packing pressing surface 28a of the second housing 28. Further, the bottom portion 25a and the top portion 25c of the packing 25 receive a compressive load from both sides, and the contact portion with the bottom surface 22a of the groove portion 22 and the contact portion with the packing pressing surface 28a are elastically deformed to ensure a predetermined waterproof function.

  As described above, according to the portable terminal device having the waterproof structure of the present embodiment, the burr portion generated from the mold split portion of the mold at the time of manufacturing the packing is formed in the groove portion formed on the end surface of the first casing. Since the position is protruded from the end face of the first housing with the packing attached, the packing may be twisted, fallen or misaligned in the groove of the first housing regardless of the presence or absence of burrs and the size of the burrs. Therefore, it can be reliably and easily mounted in a stable state, and the assembly workability can be improved.

  Further, the burr portion generated from the mold split portion of the mold at the time of manufacturing the packing is attached to the groove formed on the end surface of the first housing, and the packing is pressed with the packing pressing surface of the second housing. Since the position protruded from the end surface of one housing, the entire circumference of the packing can be uniformly elastically deformed regardless of the presence or absence of burrs and the size of the burrs.

  Further, the burr portion generated from the mold split portion of the mold at the time of manufacturing the packing is attached to the groove formed on the end surface of the first housing, and the packing is pressed with the packing pressing surface of the second housing. Because it is located between the gap between the end surface of one housing and the packing pressing surface of the second housing, the entire circumference of the packing can be uniformly elastically deformed regardless of the presence or absence of burrs and the size of the burrs. The waterproof quality can be improved.

  Moreover, since it can be used as packing without removing the burr | flash which generate | occur | produced from the parting part of the metal mold | die at the time of packing manufacture, reduction of parts manufacture costs can be aimed at.

  In addition, since the packing is formed by only an elastic member, the cross-sectional shape can be reduced, and thereby the end face width of the housing for forming the groove portion on which the packing is mounted can be narrowed, so that the device can be miniaturized.

(Embodiment 2)
Also in the second embodiment of the present invention, the description will be made using the foldable mobile phone as in the first embodiment, and the same components as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

  FIG. 5 is a schematic perspective view of a groove and a packing (waterproof packing) formed on the end surface of the first housing in the second embodiment of the present invention.

  In FIG. 5, a packing 55 formed of an elastic member in the same shape as the planar shape of the groove 22 is attached to the groove 22 formed in a concave shape that is annular or continuous with the first housing 21. The packing 55 is integrally molded with twist preventing portions 55f and 55g connected to each other on the long side facing each other by a thin portion (55e in FIG. 6). Further, the groove 22 may be formed in a rib of the first housing 21.

  FIG. 6 is a sectional view and a partially enlarged view of the packing.

  FIG. 6A shows a cross-sectional shape of the packing 55 in the DD cross-sectional view of FIG. The packing 55 has a symmetrical cross-sectional shape formed by a molding method such as injection molding, and the bottom surface of the groove 22 (22a in FIG. 7) when the packing 55 is mounted in the groove 22 formed in the first housing 21. , A bottom portion 55 a that contacts the shoulder portion 55, a shoulder portion 55 b corresponding to a split portion that divides the molding die in the vertical direction at the maximum width portion of the packing 55, and an outer side of the shoulder portion 55 b on the long side facing the packing 55 Torsion-preventing portions 55f and 55g that are molded and the top portion 55c that first contacts the packing pressing surface when the packing 55 mounted in the groove portion 22 is pressed by the packing pressing surface (not shown) of the second housing. have.

  FIG.6 (b) shows the enlarged view of the E section of Fig.6 (a). An integrally molded torsion preventing portion 55f is connected to the outside of the opposed long side shoulder portion 55b of the packing 55 by a thin portion 55e. In the process of assembling the mobile phone 10, the twist preventing portions 55f and 55g are cut off by the thin portion 55e.

  Although not shown, there is a possibility that the above-described burrs may occur on the entire circumference of the inner shoulder 55b and on the shoulder 55b corresponding to the outer mold part that does not have the twist preventing parts 55f and 55g. In addition, burrs may occur in the same way at the position of the cut-out portion where the twist preventing portions 55f and 55g are traces cut out by the thin-walled portion 55e. The invention of the present embodiment is to ensure reliable waterproofing even when burrs are generated at the position of such a cut-out portion or mold part.

  FIG. 7 is a schematic cross-sectional view showing when the packing is pressed and when the pressing is finished.

  Fig.7 (a) shows typical sectional drawing at the time of the press start of packing. In a state in which the packing 55 formed of an elastic member is attached to the groove portion 22 formed in a concave shape continuously with the end surface 21a of the first housing 21, the bottom portion 55a of the packing 55 is in contact with the bottom surface 22a of the groove portion 22 or A part of the side surface of the packing 55 is in contact with or close to the entrance portion of the groove portion 22 and the packing 55 is mounted in a stable state.

  At this time, the thin portion 55e connected to the twist preventing portion 55f integrally molded with the packing 55 is located at a position protruding from the end surface 21a of the first housing 21.

  When the pressing of the packing 55 is started, the top portion 55c of the packing 55 attached to the groove portion 22 first comes into contact with the packing pressing surface 28a of the second housing 28, and when the pressing further proceeds, the packing 55 starts elastic deformation. To do.

  FIG. 7B shows a schematic cross-sectional view at the end of pressing of the packing. FIG. 7 (b) shows a state in which the end surface 21a of the first casing 21 and the first casing 21 are in a state where pressure is applied until the stoppers (not shown) of the first casing 21 and the second casing 28 come into contact with each other. A gap (c) between the second casing 28 and the packing pressing surface 28a is maintained at a predetermined interval.

  At this time, the thin portion 55e obtained by connecting the twist preventing portion 55f integrally formed with the packing 55 is a gap (c) formed between the end surface 21a of the first housing 21 and the packing pressing surface 28a of the second housing 28. ) Further, the bottom 55a and the top 55c of the packing 55 receive a compressive load from both sides, and the contact portion with the bottom surface 22a of the groove portion 22 and the contact portion with the packing pressing surface 28a are elastically deformed to ensure a predetermined waterproof function.

  As shown in FIG. 7, the thickness of the twist preventing portions 55 f and 55 g is thinner than the gap (c) formed by the end surface 21 a of the first housing 21 and the packing pressing surface 28 a of the second housing 28. Things can be used.

  Although the shape is partially different from that shown in FIG. 7, the thickness of the torsion preventing portions 55 f and 55 g is such that the end surface 21 a of the first housing 21 and the packing pressing surface 28 a of the second housing 28. The thickness of the thin portion 55e is thinner than the gap (c) formed by the end surface 21a of the first housing 21 and the packing pressing surface 28a of the second housing 28, although it is thicker than the gap (c) formed. The twist preventing portions 55f and 55g may be disposed outside the end surface 21a of the first housing 21 and the packing pressing surface 28a of the second housing 28.

As described above, according to the method for manufacturing the mobile terminal device having the waterproof structure of the present embodiment,
The packing and torsion prevention part are molded integrally, so that the strength of the packing is substantially improved and it is easy to handle as a member, and the packing is stable without causing twisting, overturning or misalignment in the groove of the first housing. It can be reliably and easily installed in a state, and the waterproof quality can be improved and the assembling workability can be improved.

  In addition, the twist preventing portion connected by the thin wall portion is positioned so as to protrude from the end surface of the first housing in a state where the packing is mounted in the groove formed on the end surface of the first housing, so that it is easily and stably provided. In this state, it is possible to cut from the thin portion without moving the packing mounted, and the assembly workability can be improved.

  Further, in the state where the packing in which the twist preventing portion connected by the thin wall portion is mounted in the groove formed on the end surface of the first housing is pressed by the packing pressing surface of the second housing. Since it is in a position protruding from the end face, it can be easily cut off from the thin portion without moving the packing mounted in a stable state.

  Further, in the state where the packing in which the twist preventing portion connected by the thin wall portion is mounted in the groove formed on the end surface of the first housing is pressed by the packing pressing surface of the second housing. Since the gap between the end face and the packing pressing surface of the second casing is positioned, the assembled packing is moved stably after assembling the first casing and the second casing. Therefore, it can be easily cut off from the thin portion, and the assembly workability can be improved.

  In addition, since the packing is formed by only an elastic member, the cross-sectional shape can be reduced, and thereby the end face width of the housing for forming the groove portion on which the packing is mounted can be narrowed, so that the device can be miniaturized.

  In the above-described embodiment, the packing attached to the groove formed on the end surface of the first casing has been described as being pressed by the packing pressing surface of the second casing. However, the present invention is not limited to this. The groove part of the end surface of a 2nd housing | casing may be formed, and the structure which presses packing with the end surface of a 1st housing | casing may be sufficient.

  In addition, the cross-sectional shape of the packing and the shape of the groove in which the packing is mounted are not limited, and it is only necessary that the mold split portion or the twist prevention portion is in a predetermined position with the packing mounted or with the packing pressed. .

  In the above embodiments, the foldable mobile phone has been described as the mobile terminal device. However, the mobile phone is not limited to this and may be an integrated mobile phone or a slide mobile phone, and is limited to a mobile phone. It may be a digital camera, a PDA, or other electronic devices.

  As described above, the waterproof structure of the portable terminal device according to the present invention is reliable and easy in a stable state of the packing in the groove formed on the end surface of the first housing regardless of the presence or absence of the burr and the size of the burr. And is effective as a portable terminal device such as a mobile phone, a PDA, a notebook personal computer, and a portable game machine.

DESCRIPTION OF SYMBOLS 10 Mobile telephone 11 Sub display part 12 1st hinge 13 Operation part 14 Main display part 21 1st housing | casing 22 Groove part 22a Bottom face 25, 55 Packing 25a, 55a Bottom part 25b, 55b Shoulder part 25c, 55c Top part 25d Burr
28 Second housing 28a Press surface 55e Thin portion

Claims (9)

A portable terminal device having a waterproof structure for pressing a packing attached to a groove formed on an end surface of a first housing with a packing pressing surface of a second housing,
The packing has a cut portion that is a cut mark,
The cellular phone having a waterproof structure, wherein the cut-out portion is located at a position protruding from an end surface of the first casing in a state where the packing is attached to a groove formed on the end surface of the first casing. Terminal device. The cut-out portion protrudes from the end surface of the first casing in a state where the packing attached to the groove formed on the end surface of the first casing is pressed by the packing pressing surface of the second casing. The portable terminal device having a waterproof structure according to claim 1, wherein the portable terminal device is in a position. The end surface of the first housing and the end surface of the second housing in a state where the packing attached to the groove formed on the end surface of the first housing is pressed by the packing pressing surface of the second housing. There is a gap with the packing pressing surface,
The portable terminal device having a waterproof structure according to claim 1, wherein the cut-out portion is located between the gaps. A portable terminal device having a waterproof structure for pressing a packing attached to a groove formed on an end surface of a first housing with a packing pressing surface of a second housing,
The packing has a mold part,
The said parting part has the waterproof structure characterized by being in the position which protruded from the end surface of the said 1st housing | casing in the state which mounted | wore the groove part formed in the end surface of the said 1st housing | casing with the said packing. Mobile terminal device. The mold part protrudes from the end surface of the first casing in a state where the packing attached to the groove formed on the end surface of the first casing is pressed by the packing pressing surface of the second casing. The portable terminal device having a waterproof structure according to claim 4, wherein The end face of the first casing and the end face of the second casing in a state where the packing attached to the groove formed on the end face of the first casing is pressed by the packing pressing face of the second casing. There is a gap with the packing pressing surface,
The portable terminal device having a waterproof structure according to claim 4, wherein the mold part is located between the gaps. A method for manufacturing a portable terminal device that presses a packing attached to a groove formed on an end surface of a first casing with a packing pressing surface of a second casing,
The packing has a twist preventing portion connected by a thin portion,
Attaching the packing to the groove formed on the end surface of the first housing;
Cutting the twist-preventing portion at a thin portion at a position protruding from the end surface of the first housing in a state where the packing is attached to the groove formed on the end surface of the first housing. A method of manufacturing a portable terminal device. The twist in a position protruding from the end surface of the first housing in a state where the packing attached to the groove formed on the end surface of the first housing is pressed by the packing pressing surface of the second housing. The method for manufacturing a portable terminal device according to claim 7, further comprising a step of cutting off the prevention unit. The end face of the first casing and the end face of the second casing in a state where the packing attached to the groove formed on the end face of the first casing is pressed by the packing pressing face of the second casing. There is a gap with the packing pressing surface,
9. The method of manufacturing a portable terminal device according to claim 7, further comprising a step of cutting out the twist preventing portion located between the gaps.

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