JP2014057165A - Waterproof portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof portable terminal having both of a waterproof function and an antenna function with a relatively simple configuration.SOLUTION: A clearance between a waterproof rib 17 and an inner wall 26 is sealed with a frame-like waterproof packing 30. The waterproof packing 30 is formed of a conductive material and electrically connected with a circuit substrate 12 through a conductive circuit 35 and a connection terminal 13.

Description

  The present invention relates to a waterproof portable terminal.

  2. Description of the Related Art Conventionally, portable terminals such as cellular phones that are frequently carried are provided with a waterproof function. In particular, a cover that covers an electrical component such as a rechargeable battery is required to be highly waterproof.

  For example, Patent Document 1 discloses a waterproof device including first and second packings for sealing a housing. In this waterproof device, the casing and the cover are pressed against each other by compressing the first packing and sandwiching the second packing when the cover closes the opening. Accordingly, the second packing is compressed to keep the waterproof property.

  In addition, such a cellular phone is known to have a loop antenna for transmitting and receiving radio waves (see, for example, Patent Document 2). The larger the outer diameter of the loop antenna, the more advantageous it is to improve the reception sensitivity. For example, the loop antenna is arranged so as to spread over the entire back surface of the battery cover.

JP 2011-239099 A JP-A-11-004112

  However, in the conventional waterproof device, there is a problem that if the loop antenna is separately attached and the antenna function is provided, the number of parts increases and the cost increases.

  This invention is made | formed in view of this point, The objective is to provide the waterproof portable terminal which made the waterproof function and the antenna function compatible by comparatively simple structure.

  The present invention is directed to a waterproof portable terminal including a terminal main body, a circuit board accommodated in the terminal main body, and a battery cover that covers the rechargeable battery accommodated in the terminal main body in a sealed manner. A solution was taken.

That is, the first invention is a waterproof rib formed in a frame shape so as to stand on the back surface of the battery cover and cover the outer periphery of the rechargeable battery,
An inner wall formed in a frame shape so as to cover the outer periphery of the waterproofing rib formed on the terminal body;
A frame-shaped waterproof packing provided between the waterproof rib and the inner wall to seal between the waterproof rib and the inner wall;
The waterproof packing has a conductive portion that extends in a frame shape along the circumferential direction of the waterproof packing and is electrically connected to the circuit board.

  In the first invention, the frame-shaped waterproof packing has a conductive portion, and the conductive portion is electrically connected to the circuit board. Therefore, the waterproof packing can function as a loop antenna. Thereby, the waterproof function and the antenna function can be made compatible with one waterproof packing, and the number of parts can be reduced to reduce the cost.

According to a second invention, in the first invention,
The conductive portion is formed by forming the entire waterproof packing from a conductive material.

  In the second invention, since the entire waterproof packing is made of a conductive material, the waterproof function and the antenna function can be made compatible with one waterproof packing.

According to a third invention, in the first invention,
The conductive portion is composed of a layered conductive material integrally formed on the waterproof packing surface.

  In the third invention, the conductive material can be integrally formed on the waterproof packing surface in a layered manner, for example, by double molding (two-color molding) or conductive coating.

According to a fourth invention, in the third invention,
A part of the waterproof packing in the circumferential direction is provided with a non-conductive portion formed of a non-conductive material,
The conductive part extends from one end of the non-conductive part to the other end of the non-conductive part around the waterproof packing so as to sandwich the non-conductive part,
One end and the other end of the conductive portion are electrically connected to the circuit board, respectively.

  In the fourth aspect of the invention, a part of the waterproof packing is formed of a non-conductive material, and both end portions of the conductive portion are electrically connected to the circuit board. In addition, a non-loop antenna serving as an output terminal can be formed.

According to a fifth invention, in any one of the first to fourth inventions,
The waterproof packing is formed with a recessed groove recessed along the circumferential direction of the waterproof packing,
The waterproof packing is attached to the battery cover side by fitting the fitting groove into a peripheral edge of the waterproof rib.

  In the fifth invention, the waterproof packing can be attached to the battery cover side by fitting the fitting groove of the waterproof packing to the peripheral edge of the waterproof rib.

According to a sixth invention, in any one of the first to fourth inventions,
The waterproof packing is attached to the mobile terminal side by being bonded to the inner wall.

  In 6th invention, a waterproof packing can be attached to the portable terminal side by adhere | attaching a waterproof packing to an inner wall.

  According to the present invention, since the frame-shaped waterproof packing has a conductive portion, and the conductive portion is electrically connected to the circuit board, the waterproof packing can function as a loop antenna. Thereby, the waterproof function and the antenna function can be made compatible with one waterproof packing, and the number of parts can be reduced to reduce the cost.

It is a perspective view which shows the structure of the waterproof portable terminal which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of a waterproof portable terminal. It is AA arrow sectional drawing of FIG. It is BB arrow sectional drawing of FIG. FIG. 5 is a view corresponding to FIG. 4 illustrating a configuration of a waterproof mobile terminal according to the present modification. It is a front view which shows the structure of the waterproof packing which concerns on other embodiment. It is the FIG. 3 equivalent view which shows the structure of the waterproof portable terminal which concerns on other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. In each figure, the up and down and front and rear, right and left directions are indicated by arrows. Unless stated otherwise, the vertical direction will be described according to the directions indicated by these arrows.

  As shown in FIGS. 1 and 2, the waterproof portable terminal 10 includes a housing 20 as a terminal body. The housing 20 includes a front side cabinet 21 in which the display unit 11 is accommodated, and a back side cabinet 25 in which the rechargeable battery 15 is accommodated. A resin seal ring 22 is sandwiched between peripheral edges of the front cabinet 21 and the back cabinet 25. Further, the circuit board 12 is accommodated between the front cabinet 21 and the back cabinet 25.

  The back side of the back side cabinet 25 is covered with a battery cover 16. The back cabinet 25 is made of, for example, a resin molded product, and a rectangular frame-shaped inner wall 26 having an inner circumference that is slightly larger than the outer circumference of a waterproof rib 17 described later is integrally formed.

  As shown in FIGS. 3 and 4, the battery cover 16 is formed of, for example, a rectangular dish-shaped resin molded product, and a rectangular frame-shaped waterproof rib 17 is integrally formed on the back surface thereof. The waterproof rib 17 has an inner circumference that is slightly larger than the outer shape of the rechargeable battery 15. The waterproof rib 17 is covered with a waterproof packing 30.

  The waterproof packing 30 is formed in a rectangular frame shape corresponding to the shape of the waterproof rib 17. The waterproof packing 30 is formed with a fitting groove 31 that is recessed along the circumferential direction. The waterproof packing 30 is attached to the battery cover 16 side by fitting the fitting groove 31 of the waterproof packing 30 to the peripheral edge of the waterproof rib 17. A bulging portion 32 is provided on the outer peripheral surface of the waterproof packing 30. The bulging portion 32 is pressed against the inner wall 26 of the back-side cabinet 25, and the space between the waterproof rib 17 and the inner wall 26 is sealed with the waterproof packing 30.

  The waterproof packing 30 is made of a conductive material. That is, the entire waterproof packing 30 constitutes the conductive portion 30a. A conductive circuit 35 is formed on the contact surface of the inner wall 26 with the waterproof packing 30. The conductive circuit 35 is formed by, for example, LDS (Laser Direct Structure) or MID (Molded Interconnect Device). The conductive circuit 35 is arranged along the inner wall 26 from the contact surface with the waterproof packing 30 to the rear surface of the rear surface portion 27 of the rear side cabinet 25, the inner peripheral surface of the through hole 28 of the rear surface portion 27, and the front surface of the rear surface portion 27. It extends continuously to the surface facing the substrate 12.

  A connection terminal 13 is provided on the circuit board 12. The tip of the connection terminal 13 is electrically connected to the conductive circuit 35. Thereby, the waterproof packing 30 is electrically connected to the circuit board 12 via the conductive circuit 35 and the connection terminal 13.

  With such a configuration, the waterproof packing 30 can function as a loop antenna. Thereby, the waterproof function and the antenna function can be made compatible with one waterproof packing 30, and the number of parts can be reduced to reduce the cost.

  As shown in FIG. 5, the waterproof packing 30 may be attached to the housing 20 side by bonding the waterproof packing 30 to the inner wall 26. In this case, the waterproof packing 30 is electrically connected to the conductive circuit 35 of the inner wall 26 so as to function as a loop antenna, and the waterproof packing 30 is pressed against the inner wall 26 by the bulging portion 17a of the waterproof rib 17 to be waterproof. Should be ensured.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  In the present embodiment, the entire waterproof packing 30 is formed of a conductive material, but the present invention is not limited to this form. For example, as shown in FIG. 6, only a part of the rectangular frame-shaped waterproof packing 30 in the circumferential direction may be a non-conductive portion 30b formed of a non-conductive material, and the remaining portion may be a conductive portion 30a.

  Specifically, the waterproof packing 30 is formed of a resin material, and the waterproof packing 30 is rounded from one end of the non-conductive portion 30b so as to sandwich the non-conductive portion 30b, that is, the non-conductive portion 30b. The part extending to the other end may be subjected to double molding (two-color molding) or conductive coating, and a layered conductive part 30a may be integrally formed on the surface of the waterproof packing 30.

  Then, as shown in FIG. 7, the two connection terminals 13 for input and output are provided on the circuit board 12, and the conductive portion of the waterproof packing 30 is electrically connected to the conductive circuit 35 at the tip portion. Both end portions of 30a are connected to the connection terminal 13, respectively. As a result, a non-loop antenna having both end portions of the conductive portion 30a as input terminals and output terminals can be formed.

  As described above, the present invention is useful for a waterproof portable terminal having a battery cover that covers a rechargeable battery.

DESCRIPTION OF SYMBOLS 10 Waterproof portable terminal 12 Circuit board 15 Rechargeable battery 16 Battery cover 17 Waterproof rib 20 Case (terminal main body)
26 inner wall 30 waterproof packing 30a conductive part 30b non-conductive part 31 fitting groove

Claims (6)

A waterproof portable terminal comprising: a terminal body; a circuit board housed in the terminal body; and a battery cover that hermetically covers the rechargeable battery housed in the terminal body,
A waterproof rib formed in a frame shape so as to stand on the back surface of the battery cover and cover the outer periphery of the rechargeable battery;
An inner wall formed in a frame shape so as to cover the outer periphery of the waterproofing rib formed on the terminal body;
A frame-shaped waterproof packing provided between the waterproof rib and the inner wall to seal between the waterproof rib and the inner wall;
The waterproof portable terminal, wherein the waterproof packing includes a conductive portion extending in a frame shape along a circumferential direction of the waterproof packing and electrically connected to the circuit board. In claim 1,
The waterproof portable terminal, wherein the conductive portion is formed by forming the entire waterproof packing from a conductive material. In claim 1,
The waterproof portable terminal, wherein the conductive portion is composed of a layered conductive material integrally formed on the waterproof packing surface. In claim 3,
A part of the waterproof packing in the circumferential direction is provided with a non-conductive portion formed of a non-conductive material,
The conductive part extends from one end of the non-conductive part to the other end of the non-conductive part around the waterproof packing so as to sandwich the non-conductive part,
One end and the other end of the conductive part are electrically connected to the circuit board, respectively. In any one of claims 1 to 4,
The waterproof packing is formed with a recessed groove recessed along the circumferential direction of the waterproof packing,
The waterproof portable terminal, wherein the waterproof packing is attached to the battery cover side by fitting the fitting groove into a peripheral edge of the waterproof rib. In any one of claims 1 to 4,
The waterproof portable terminal, wherein the waterproof packing is attached to the portable terminal side by being bonded to the inner wall.

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