JPWO2011135729A1 - Mobile terminal device - Google Patents

Abstract

Provided is a portable terminal device that prevents the battery cover from being damaged even when the device main body receives an impact force and has an excellent waterproof function. In the portable terminal device 10 having the battery cover 22 that closes the opening 26a of the battery chamber 26 formed in the device body 12, the battery cover 22 has an integrated structure in which an outer cover 22A and an inner cover 22B are stacked, The cover 22B includes a reinforcing plate 46 and a packing 48 that are laminated on the outer cover 22A via an adhesive tape 44 and made of a material different from that of the outer cover 22A.

Description

  The present invention relates to a portable terminal device having a battery cover that closes a battery chamber in which a battery is accommodated.

  In recent years, particularly in the case of portable terminal devices used for business use, power consumption has increased due to, for example, the use of scanner devices, etc., and therefore rechargeable batteries must be periodically replaced (for example, once / day). Yes, the battery cover is designed to be removable with a simple operation.

In addition, the battery cover is required to satisfy a specification such that the battery cover is not damaged even when the mobile terminal device is subjected to an impact by dropping or the like and the waterproof performance can be maintained.
In addition, as a waterproof standard for electronic devices including portable terminal devices, for example, in the protection class of IPX7 in JIS / IEC (International Electrotechnical Commission), the temperature range is 15 to 35 ° C., and the lowest end of the device is diving 1 m from the water surface The waterproof level is set so as not to be submerged even after a test time of 30 minutes.

  For this reason, as a portable terminal device, it is possible to obtain a packing pressure necessary for waterproofing when the cover is closed. It is desirable to have sufficient impact resistance.

  On the other hand, in Patent Document 1, for example, a battery stored in the battery storage unit and a bag that closes the battery storage port are provided, and a packing that holds a sealed state is disposed between the bag and the battery storage port. A configuration of a portable terminal device is disclosed.

This packing is fitted into the inner periphery of the bag to prevent water from entering from the battery storage port.
Further, in Patent Document 2, in the mobile terminal device, the battery cover includes a bag having an inner portion facing the battery made of an elastic material and an outer portion made of sheet metal, and a cover covering the bag. Duplication is achieved.

  And the shaft attached to the scissors is attached to the shaft receiving part on the apparatus main body side, and the scissors open and close sideways. Further, the cover has a claw and a lock lever which are hooked on the apparatus main body side.

  However, in Patent Document 1, since the hook is hooked on the casing of the apparatus main body by the hook, if the apparatus main body is accidentally dropped, the hook is damaged or detached by impact, and is disposed around the inner side of the hook. There was a possibility that the waterproof performance of the sealed packing might be impaired.

  Moreover, in patent document 2, the collar and the cover are comprised with the separate body instead of integral structure. For this reason, if the device body is accidentally dropped, etc., the claws of the cover may be damaged and detached due to the impact at the time of dropping, and the shaft receiving portion on the device body supporting the lid may be damaged. There is. Furthermore, if the cover and the lid are damaged, the waterproof performance of the battery cover is impaired.

JP-A-10-241648 JP 2008-130519 A

The present invention provides a portable terminal device that prevents damage to a battery cover even when the device main body receives an impact force, and has an excellent waterproof function.
The present invention provides a portable terminal device having a battery cover that is formed in the device body and closes an opening of a battery chamber that houses a battery.
The battery cover has an integrated structure in which an outer cover and an inner cover are laminated and bonded,
The inner cover includes a reinforcing member and a seal member which are stacked on the outer cover via a fixing unit and are made of a material different from that of the outer cover.

  According to the present embodiment, the inner cover includes the reinforcing member and the sealing member that are stacked on the outer cover via the fixing means and are made of a material different from that of the outer cover. Even if it is damaged due to force, it is protected by the reinforcing member and the inside of the battery chamber is not exposed. Further, the waterproof function between the battery chamber and the battery cover is maintained by the seal member.

It is the external view which looked at the portable terminal device of embodiment of this invention from the front side. It is the external view which looked at the portable terminal device of embodiment of this invention from the back side. It is the external view which removed the battery cover and looked at the portable terminal device from the back side. It is an external view when a battery cover is seen from the inner surface side. It is an external view of other embodiment when a battery cover is seen from the inner surface side. It is an external view when an outer cover is seen from the inner surface side. It is an external view of other embodiment when an outer side cover is seen from an inner surface side. It is a disassembled perspective view of a battery cover when an inner cover is laminated | stacked on the inner surface of an outer cover. It is a disassembled perspective view of other embodiment of a battery cover when an inner cover is laminated | stacked on the inner surface of an outer cover. It is a disassembled perspective view of a lever arm, an operation plate, and an operation knob. It is an assembly drawing of a lever arm, an operation plate, and an operation knob. It is a top view when a battery cover is seen from the inner surface side. It is a figure which shows the lock release state of a lever arm. It is a figure which shows the locked state of a lever arm.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a mobile terminal device according to an embodiment of the present invention viewed from the front side, and FIG. 2 is an external view of the mobile terminal device viewed from the back side.

  The portable terminal device is known as HHT (Hand Held Terminal), and is a small mobile device that can be carried and can perform sales management, inventory management, purchase management, and other wireless communication.

  In FIG. 1, a portable terminal device 10 has a menu screen, a display unit 14 such as a liquid crystal display (LCD) for outputting stored data, and data input for operating and inputting data, on the front surface of an elongated rectangular main body 12. The device main body 12 includes a data processing unit (calculation unit) (not shown) that processes data input from the input key 16 and the like. .

In addition, although it is not equipped in the portable terminal device 10 of this Embodiment, there exists a specification of mounting the printer as a printing function.
In FIG. 2, on the back side of the mobile terminal device 10, there is a battery cover 22 that closes an opening 26 a (see FIG. 3) of a battery chamber 26 that houses the battery 20.

As will be described in detail later, the battery cover 22 can be attached to and detached from the opening 26a by being locked (locked) or unlocked by rotating the operation knob 62.
The portable terminal device 10 is equipped with a scanner unit (mark reading unit) (not shown) that reads code information attached to an article (product).

  Note that when an e-mail or the like is transmitted using the portable terminal device 10, when the user inputs a telephone number, an e-mail address, or the like using the input key 16, data is designated by long-distance wireless communication. Called to the other communication partner. The transmitted data is transmitted from the base station to a communication partner via a telephone line, a LAN line, or the like.

FIG. 3 is an external view of the mobile terminal device 10 when viewed from the back side with the battery cover 22 removed.
In the present embodiment, the battery 20 is a rechargeable battery and is detachably accommodated in a battery chamber 26 formed on the back side of the apparatus main body 12. The battery chamber 26 is designed to maintain its waterproof function by closing the opening 26 a with the battery cover 22.

  The opening 26 a is open at substantially half of the lower side in the longitudinal direction (Y direction in FIG. 3) of the apparatus main body 12. In addition, a lock mechanism accommodating portion 28 is formed at the approximate center in the longitudinal direction of the apparatus main body 12 and above the opening 26a.

  The locking mechanism accommodating portion 28 has a step formed at the boundary with the back surface of the apparatus main body 12. This step corresponds to a thickness portion of the battery cover 22 that covers the lock mechanism housing portion 28. Thus, when the battery cover 22 is attached to the opening 26a of the battery chamber 26, the back surface of the apparatus main body 12 becomes a smooth surface (see FIG. 2).

  Further, the lock mechanism housing portion 28 has an operation knob housing portion 32 at the approximate center in the width direction (X direction in FIG. 3) of the apparatus main body 12. Furthermore, lock pins 34 and 35 are provided on the left and right ends in the width direction of the lock mechanism housing portion 28 toward the lower side in the longitudinal direction of the apparatus main body 12 (Y direction in FIG. 3). A lever arm 61 of a lock mechanism 60 described later is engaged with the lock pins 34 and 35.

  Further, claw mounting portions 36 and 37 are cut out at the left and right end portions below the opening 26a of the battery chamber 26 (downward in the Y direction in FIG. 3). The claws 40 and 41 (see FIG. 4A and the like) of the battery cover 22 are hooked and fixed to the claw mounting portions 36 and 37.

  A thin wall surface 30 is formed around the opening 26 a of the battery chamber 26. A packing 48 (see FIG. 4A and the like), which will be described later, is brought into contact with the wall surface 30 to maintain the waterproof property of the battery chamber 26.

FIG. 4A is an external view of the battery cover 22 as viewed from the inner surface side. FIG. 4B is an external view of another embodiment (described later) when the battery cover is viewed from the inner surface side.
As shown in FIG. 4A, the battery cover 22 has an integral structure in which an outer cover 22A and an inner cover 22B are stacked.

  The battery cover 22 closes the opening 26a of the battery chamber 26 so as to have a predetermined strength against impact force and the like, and also has a waterproof function (for example, IPX7 grade in IS / IEC) that satisfies an excellent waterproof standard level. have.

FIG. 5A is an external view of the outer cover 22A as viewed from the inner surface side. FIG. 5B is an external view of another embodiment (described later) when the outer cover is viewed from the inner surface side.
As shown in FIG. 5A, the outer cover 22A is made of an elastic material such as synthetic resin (for example, polycarbonate), and has a cover body 23 at the center. The outer cover 22A has an arm guide 38 and a lock mechanism 60 formed on the upper side in the longitudinal direction (Y direction in FIG. 5A).

  The arm guide 38 is erected in the thickness direction (Z direction in FIG. 5A). The arm guide 38 guides the movement of the lever arm 61 as a lever member in the width direction (X direction in FIG. 5A). The lever arm 61 is moved in the width direction by the operation of the operation knob 62.

  Claws 40 and 41 are formed at the left and right ends of the cover body 23 on the lower side in the longitudinal direction (Y direction in FIG. 5A). The claws 40 and 41 are attached to the claw attachment portions 36 and 37 of the apparatus main body 12 described above. The claws 40 and 41 are fitted into the claw attachment portions 36 and 37 and the lock mechanism 60 is locked, whereby the outer cover 22A (battery cover 22) is attached to the apparatus main body 12.

  Further, side ribs 42 and 43 erected on the inner surface side in the thickness direction (Z direction in FIG. 5A) are continuous in the longitudinal direction at the left and right ends of the cover body 23 in the width direction (X direction in FIG. 5A). Is formed. The side ribs 42 and 43 are formed along the wall surface 30 on the side of the opening 26 a of the battery chamber 26.

  FIG. 6A is an exploded perspective view of the battery cover 22 when the inner cover 22B is stacked on the outer cover 22A. FIG. 6B is an exploded perspective view of another embodiment (described later) of the battery cover when the inner cover is laminated on the inner surface of the outer cover.

  As shown in FIG. 6A, in the present embodiment, the inner cover 22B includes a reinforcing plate 46 as a reinforcing member made of a material different from that of the outer cover 22A, and fixing means provided on the side of the outer cover 22A of the reinforcing plate 46. And a packing 48 as a seal member provided on the opposite side of the reinforcing plate 46 from the adhesive tape 44 side. Thus, the inner cover 22 </ b> B is attached to the outer cover 22 </ b> A with the adhesive tape 44 and laminated.

  As the adhesive tape 44, for example, a rectangular frame-like elastic material such as a double-sided tape is used. The adhesive tape 44 has a function of bonding the outer cover 22A and the reinforcing plate 46 and a function of buffering against an impact. For this reason, the adhesive tape 44 is required to have adhesiveness and impact resistance. Further, the adhesive tape 44 has non-water immersion properties for waterproofing.

The reinforcing plate 46 reinforces the mechanical strength of the outer cover 22A, and is made of a metal plate (for example, stainless steel) having wear resistance and impact resistance.
The reinforcing plate 46 has a plate body 50 having an opening 50a in the center, a cover portion 51 formed on the upper side in the longitudinal direction (Y direction in FIG. 6A) of the plate body 50, and projects downward in the longitudinal direction. A pair of left and right projections 56 and 57, and left and right rib portions 53 and 54 formed at the left and right ends of the plate body 50 in the width direction (X direction in FIG. 6A).

  Thus, the plate body 50 of the reinforcing plate 46 reinforces the cover body 23 of the outer cover 22A, and the left and right rib portions 53 and 54 of the reinforcing plate 46 reinforce the side ribs 42 and 43 of the outer cover 22A. ing. Further, the protrusions 56 and 57 of the reinforcing plate 46 reinforce the claws 40 and 41 of the outer cover 22A. The cover portion 51 of the reinforcing plate 46 protects the lock mechanism 60.

  Since the reinforcing plate 46 has wear resistance, even if the frame portion of the synthetic resin outer cover 22A comes into contact with other objects and wears, the reinforcing plate 46 does not wear to the inside of the reinforcing plate 46. For this reason, the battery chamber 26 is not exposed and the waterproofness inside the battery chamber 26 is maintained.

  Further, since the reinforcing plate 46 has impact resistance, the inner cover 22B including the reinforcing plate 46 is not damaged even if the outer cover 22A made of synthetic resin is damaged due to dropping or the like. For this reason, the battery chamber 26 is not exposed and the waterproofness inside the battery chamber 26 is maintained.

  Further, at the upper end in the longitudinal direction of the right rib portion 54 of the reinforcing plate 46, a deformation preventing metal fitting 58 is provided as a deformation preventing member that is substantially L-shaped and protrudes to the inner surface side in the thickness direction (Z direction in FIG. 6A). It has been.

  The deformation prevention metal fitting 58 prevents one end side in the longitudinal direction of the lever arm 61 of the lock mechanism 60 (right end side in the X direction in FIG. 6A) from being deformed to the inner surface side in the thickness direction (Z direction in FIG. 6A). Has a role to play.

  The packing 48 is made of a non-water-impregnated rubber or synthetic resin. The packing 48 has a rectangular frame shape having a rectangular opening 48a at the center. The size of the opening 48a is equal to or larger than that of the opening 50a of the reinforcing plate 46.

  The packing 48 is affixed to one surface of the reinforcing plate 46 (surface opposite to the adhesive tape 44) via an adhesive tape or adhesive (not shown). Thus, the outer cover 22 </ b> A is integrally laminated on the reinforcing plate 46 and the packing 48.

The packing 48 is pressed against the wall surface 30 around the opening 26a of the battery chamber 26 with a predetermined pressure, so that the waterproof function of the battery chamber 26 is maintained by the repulsive force.
Further, as described above, the battery cover 22 has the protrusions 56 and 57 of the reinforcing plate 46 of the inner cover 22B projecting inward in the width direction from the claws 40 and 41 of the outer cover 22A. Therefore, the protrusions 56 and 57 are hooked on the lower end side of the opening 26a of the battery chamber 26, and the hooking portion is reinforced.

In the present embodiment, the contents to be laminated are described by attaching the adhesive between the outer cover 22A and the inner cover 22B with the adhesive tape 44, but the present invention is not limited to this.
For example, FIG. 4B shows an external view of another embodiment of the battery cover 22 in which a packing 91 (see FIG. 6B) is sandwiched between the outer cover 22A and the inner cover 22B.

This will be described with reference to FIGS. 4B, 5B and 6B.
In FIG. 5B, side ribs 42 and 43 erected on the inner surface side in the thickness direction (Z direction in FIG. 5B) at the left and right ends of the cover body 23 in the width direction (X direction in FIG. 5B) of the outer cover 22A. Are formed continuously in the longitudinal direction.

A plurality of protrusions 81 and 82 are formed in the center in the thickness direction, slightly closer to the center than both ends in the longitudinal direction of the side ribs 42 and 43.
6B, the left and right rib portions 53 and 54 formed at the left and right end portions of the reinforcing plate 46 in the width direction of the plate body 50 (X direction in FIG. 6B) are slightly closer to the center than both ends in the longitudinal direction. Thus, a plurality of through-holes 83 and 84 are formed substantially in the center in the thickness direction. The protrusions 81 and 82 and the through holes 83 and 84 described above constitute a fixing means.

  Thus, the protrusions 81 and 82 on the side ribs 42 and 43 erected on the inner surface side of the cover main body 23 of the outer cover 22A are formed in the through holes formed in the left and right rib portions 53 and 54 of the reinforcing plate 46. By fitting with 83 and 84, the outer cover 22A and the inner cover 22B can be integrated without bonding. Note that the through holes 83 and 84 do not have to pass through in particular, and may be configured so as to be fitted with the protrusions 81 and 82 such as a dent.

  Also, in FIG. 6B, a packing 91 that is approximately the same size as the adhesive tape 44 is sandwiched between the outer cover 22A and the inner cover 22B. By making the thickness of the packing 91 a little thicker than the gap between the outer cover 22A and the inner cover 22B, when the packing 91 is sandwiched, the packing 91 is brought into close contact with the pressure, and non-water-impregnation can be achieved.

Next, the lock mechanism 60 will be briefly described.
The lock mechanism 60 is a mechanism that presses and locks the battery cover 22 toward the apparatus main body 12 when the battery cover 22 is disposed in the opening 26 a of the battery chamber 26.

  The lock mechanism 60 includes a lever arm 61 as a lever member movably provided on the battery cover 22, an operation knob 62 as an operation means for operating the lever arm 61, and lock pins 34 and 35 of the apparatus main body 12. (See FIG. 3). The lever arm 61 is engaged with the lock pins 34 and 35 of the apparatus main body 12 when the battery cover 22 closes the opening 26 a of the battery chamber 26.

FIG. 7 is an exploded perspective view of the lever arm 61, the operation plate 63, and the operation knob 62, and FIG. 8 is an assembly view thereof.
7 and 8, the lever arm 61 has a rectangular frame-shaped frame body 65 having a first end 65a, and a step with respect to the frame body 65 in the lower part (Z direction) of FIG. A flat plate portion 66 extending horizontally and a second end portion 67 extending horizontally from the flat plate portion 66 with a slight step upward (Z direction) in the figure.

  The first end portion 65a and the second end portion 67 are engaged with the lock pins 34 and 35 by moving the lever arm 61 in the right direction (X direction) in FIG. Match.

  An operation pin 68 is erected on the flat plate portion 66 of the lever arm 61. On the other hand, a through hole 69 is formed in the operation plate 63. The operation plate 63 is attached to the operation pin 68 of the lever arm 61 through the through hole 69. The operation plate 63 has a plurality of (four in the figure) through-holes 70 in addition to the through-holes 69. The operation knob 62 is attached using this through hole 70.

  Further, the lever arm 61 is held so as to be movable with respect to the battery cover 22 in the width direction (X direction in FIGS. 5A and 6A). However, the lever arm 61 does not move in the thickness direction (Z direction in FIG. 5A) with respect to the battery cover 22. The lever arm 61 moves in the longitudinal direction by rotating an operation knob 62 attached to the operation plate 63.

FIG. 9 is a plan view of the battery cover 22 as viewed from the inner surface side.
In FIG. 9, when the operation knob 62 is rotated in the direction of arrow B, the lever arm 61 moves in the direction of arrow C. Thereby, the 1st end part 65a and the 2nd end part 67 of the lever arm 61 engage with the lock pins 34 and 35 (refer FIG. 3).

10A and 10B are diagrams illustrating the operating state of the lever arm 61. FIG.
10A shows the unlocked state of the lever arm 61 with respect to the lock pins 34 and 35 (see FIG. 3), and FIG. 10B shows the locked state of the lever arm 61 with respect to the lock pins 34 and 35.

As shown in FIG. 10A, when the lever arm 61 is unlocked, the lever arm 61 and the lock pins 34 and 35 are not engaged.
That is, in this state, the first end portion 65a and the second end portion 67 of the lever arm 61 and the lock pins 34 and 35 are in a positional relationship separated in the longitudinal direction (X direction).

Next, as shown in FIG. 10B, when the operation knob 62 is rotated, the lever arm 61 moves in the longitudinal direction (arrow C direction) via the operation plate 63 and the operation pin 68.
In practice, this operation is performed by positioning the battery cover 22 so as to cover the opening 26a of the battery chamber 26, and in this state, the operation knob 62 is housed in the operation knob housing part 32 of FIG.

  Thus, the lever arm 61 moves in the longitudinal direction (X direction), and the upper surfaces (the A and A ′ surfaces in FIG. 10A) of the first and second end portions 65a and 67 are below the lock pins 34 and 35. Engage in the side (Z direction). As a result, the lever arm 61 and the lock pins 34 and 35 are locked.

  Due to this engagement, the battery cover 22 shown in FIG. 4A is closed by the opening 26 a of the battery chamber 26. The tips of the first end portion 65a and the second end portion 67 are preferably formed on tapered surfaces so as to be easily engaged with the lock pins 34 and 35.

  Further, the upper surfaces (the A surface and the A ′ surface in FIG. 10A) of the first end portion 65a and the second end portion 67 are located slightly above (the Z direction in FIG. 10A) the lowermost surfaces of the lock pins 34 and 35. ing. Accordingly, the lever arm 61 moves slightly downward (Z direction in FIG. 10A) in a state where the first end portion 65a and the second end portion 67 are engaged with the lock pins 34 and 35.

  By moving the lever arm 61 downward (Z direction in FIG. 10A), the battery cover 22 is pressed against the apparatus main body 12 side. Thereby, the packing 48 is pressed against the wall surface 30 around the battery chamber 26, and the waterproof performance is maintained.

  In the present embodiment, a metal rod having a circular cross section is used as the lock pins 34 and 35. However, the present invention is not limited thereto, and may be, for example, a triangular cross section or an ellipse. Thereby, when the lever arm 61 is engaged with the lock pins 34 and 35, the lever arm 61 is easily moved downward by the corners of the lock pins 34 and 35.

  Thus, in this embodiment, the lever arm 61 is moved in the longitudinal direction by turning the operation knob 62 at the center of the battery cover 22, and the lever arm 61 is moved to the left and right ends in the width direction of the apparatus main body 12. Engage with the two lock pins 34 and 35.

  At this time, in the present embodiment, the lever arm 61 is not fixed to the apparatus main body 12 and the battery cover 22 and is movable. For this reason, even if the apparatus main body 12 is accidentally dropped or the like, the impact is not easily transmitted directly to the lever arm 61. For this reason, the lever arm 61 is held in a locked state without being deformed. In this way, since the battery cover 22 is not detached, the waterproof function of the battery chamber 26 is maintained.

  Further, when the lever 69 is moved by operating the operation knob 62 and the lever arm 61 is engaged with the two lock pins 34 and 35 on the left and right sides of the apparatus body 12 in the width direction, the end of the lever arm 61 is The portion (second end portion 67) is covered with a deformation preventing metal fitting 58 formed on the reinforcing plate 46. Accordingly, it is possible to prevent the second end 67 of the lever arm 61 from being deformed (for example, bent toward the apparatus main body 12) even when used for a long time.

  In the present embodiment, the case where one end side (second end portion 67) of the lever arm 61 is covered with the deformation preventing metal fitting 58 has been described, but the present invention is not limited to this. For example, you may make it cover the both ends of the lever arm 61 with the same metal fitting.

  Further, in order to attach the battery cover 22 to the apparatus main body 12, the battery cover 22 closes the opening 26a of the battery chamber 26, and the battery cover 22 is slid downward in the longitudinal direction (Y direction in FIG. 3). . Thus, after the claws 40 and 41 of the battery cover 22 are fitted into the claw attachment portions 36 and 37, the operation knob 62 is operated. Thereby, the battery cover 22 closes the opening 26a of the battery chamber 26 and is locked.

At the same time, the protrusions 56 and 57 of the reinforcing plate 46 are also fitted into the wall surface 30 of the opening 26a, so that the mounting strength of the battery cover 22 is reinforced.
The device body 12 is made of an elastic material such as a synthetic resin, and the packing 48 of the battery cover 22 is pressed against the wall surface 30 around the battery chamber 26. 26 a is closed by the battery cover 22 without a gap.

  According to the present embodiment, the battery cover 22 has an integrated structure in which the inner cover 22B and the outer cover 22A are stacked, and the inner cover 22B is a reinforcing plate that is stacked on the outer cover 22A via the adhesive tape 44. Since it has 46 and the packing 48, the portable terminal device 10 can be equipped with impact resistance.

  Further, simply by mounting and locking the battery cover 22 in the opening 26 a of the battery chamber 26, the packing 48 of the battery cover 22 presses the wall surface 30 around the battery chamber 26, and the opening 26 a of the battery chamber 26 is gapd. Therefore, the battery chamber 26 can be kept waterproof.

Claims (7)

In a portable terminal device having a battery cover that closes an opening of a battery chamber that is formed in the device main body and houses a battery,
The battery cover has an integral structure in which an outer cover and an inner cover are laminated,
The mobile terminal apparatus, wherein the inner cover includes a reinforcing member and a seal member which are stacked on the outer cover via a fixing unit and are made of a material different from the outer cover. The mobile terminal device according to claim 1, wherein the reinforcing member is made of a metal plate. The portable terminal device according to claim 1, wherein the fixing unit is made of an adhesive. The portable terminal device according to claim 1, wherein the fixing unit includes a protrusion and a fitting portion between the protrusion. The mobile terminal device according to claim 3, wherein the adhesive is made of a non-water-impregnated double-sided tape. The portable terminal device according to claim 4, further comprising a non-immersible packing between the outer cover and the inner cover. The portable terminal device according to claim 1, wherein the seal member is made of non-water-immersible packing.

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