JP2629376B2 - Mobile phone - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a thin, lightweight, small-sized portable telephone.

2. Description of the Related Art In recent years, demand for portable telephones in the telephone industry has been remarkable, and is said to be the future of mobile telephones. It has been desired that portable telephones of this type are increasingly thin, lightweight, and easy to operate.

An example of a conventional portable telephone will be described with reference to FIG. In FIG. 3, reference numeral 10 denotes a portable telephone, which is a board main body 5 in which main printed boards 5a and 5b and a printed board 5c are connected by direct connectors 6a and 6b, respectively.
A shield case 4 for electromagnetically shielding the board body 5, a speaker 1, and a microphone 2 are connected to the body case 3
It is constituted so that it may be accommodated.

An electronic component 9 (for example, a resistor or the like) that can be reflowed by solder is mounted on the main printed circuit boards 5a and 5b, and an electronic component 7 (for example, an oscillator or the like) that cannot be reflowed solder is mounted on the printed circuit board 5b.

However, in the portable telephone 10 described above, since large components such as the main printed circuit boards 5a and 5b and the shield case 4 are housed in the body case 3, the thickness of the body case 3 itself is reduced. The main printed circuit boards 5a and 5
There is a problem that the weight of the shield case 4 becomes heavier than that of the shield case 4. In addition, there is a problem that the number of assembly steps is increased due to the presence of the parts of the main printed circuit boards 5a and 5b and the shield case 4.

The present invention solves such a conventional problem, and reduces the number of large components such as a main printed circuit board and a shield case, thereby reducing the number of assembly steps. A telephone is provided.

Means for Solving the Problems In order to achieve the above object, a portable telephone according to the present invention narrows down a printed circuit board in which electronic components that cannot be reflowed by soldering are incorporated, and a copper foil forming surface of a metal printed circuit board is on the inside. And two case bodies each incorporating an electronic component that can be reflowed by soldering. A transmitting unit, a receiving unit, and a grip are fixed to a case formed by combining the case bodies, and the printed circuit board is incorporated in the case. It is composed.

Operation Therefore, the portable telephone according to the present invention is narrowed down with the copper foil forming surface of the metal printed circuit board on the inside to form a case main body. Therefore, the number of large components such as the main board and the shield case can be omitted. it can.

Embodiment Hereinafter, the present invention will be described with reference to FIGS. 1 and 2. 1 and 2 show the configuration of an embodiment of the portable telephone according to the present invention.

In FIG. 1, reference numeral 20 denotes a portable telephone. This portable telephone 20 accommodates a speaker 1, a microphone 2, and a printed circuit board 8 inside a case 21 formed by combining two case bodies 21A and 21B. Further, on the outer side surface 21b of the case body 21A, there are provided a transmitting section 11, a receiving section 12 corresponding to the microphone 2, the speaker 1, and a grip 13 for making it easy for the user to grasp.

The case main bodies 21A and 21B shown in FIG.
The copper foil forming surfaces 21a and 21b provided with the copper foil pattern 21d of 1c are drawn inward with the copper foil forming surfaces 21a and 21b being formed as one body. The metal printed board 21c has an insulating layer made of epoxy on the surface of an aluminum plate, and a copper foil pattern 21d is formed on the surface of the insulating layer. This aluminum plate is an insulator and forms a case 21 as well as a conventional shield case. In the copper foil pattern 21d of the copper foil forming surface 21a of one case body 21A forming the case 21, a leadless electronic component 9 capable of reflow soldering, and a speaker 1 and a microphone 2 are incorporated. Copper foil forming surface 2 of the other case body 21B
Similarly, a leadless electronic component 9 that can be reflowed by soldering is incorporated in the copper foil pattern 21d of 1b.

The printed board 8 incorporates an electronic component 7 that cannot be reflowed by soldering, and conduction between the printed board 8 and the metal printed board 21c is performed by a cable 8a. The conduction between the printed board 8 and the metal printed board 21C is determined by the cable 8a.
However, the present invention can be applied to a flexible printed board or a rubber connector (not shown).

The transmitting section 11 is for collecting sound to the microphone 2 and is fixed to an outer side surface 21 b facing the microphone 2 incorporated in an inner side surface 21 a of the case main body 21. The receiver 12 blocks external noise so that the sound emitted from the speaker 1 can be easily heard by a listener.
The speaker 1 is fixed to an outer surface 21b facing the speaker 1 incorporated in the speaker 21a. The grip 13 is for making it easier to hold the case which is a telephone when transmitting and receiving.
It is fixed to an outer side surface 21b located between the transmitting unit 11 and the receiving unit 12.

Next, the operation of the above embodiment will be described. In the above embodiment, the case main body 21 is formed integrally by narrowing down the copper foil forming surface 21a of the metal printed board 21c inside, so that the copper foil pattern 21d is not cut and the main printed board 5a, 5b and shield case 4 are attached to main body case 21
The thickness of the case body 21 can be reduced, and the weight can be reduced and the size can be reduced.

Effect of the Invention As described above, the portable telephone according to the present invention incorporates a printed circuit board in which electronic components that cannot be reflowed by soldering are incorporated, and an electronic component that can be narrowed down with the copper foil forming surface of the metal printed circuit board inward and solder reflowed. And a case formed by combining the case main body, a transmitting section, a receiving section, and a grip are fixed to the case, and the printed circuit board is incorporated in the case. And the number of components such as the main board and the shield case can be reduced, so that the weight can be reduced and the size can be reduced. In addition, the number of components can be reduced, so that the number of assembling steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a configuration of an embodiment of a mobile phone according to the present invention, FIG. 2 is a perspective view showing a case body of the mobile phone, and FIG. 3 is a configuration of a conventional mobile phone. FIG. 7: Electronic components that cannot be reflowed by solder, 8: Printed circuit board, 9: Electronic components that can be reflowed by solder, 11: Transmitter, 12: Receiver, 13: Grip, 20: Portable telephone, 21 …… Case body, 21a …… Copper foil forming surface, 21c …… Metal printed circuit board.

Claims (1)

(57) [Claims] 1. A printed circuit board in which an electronic component that cannot be reflowed by soldering is incorporated, and two case bodies in which electronic components that can be soldered and reflowed by narrowing down the copper foil forming surface of the metal printed board inside are provided. A portable telephone comprising: a transmitting unit, a receiving unit, and a grip fixed to a case formed by combining a case main body and the printed circuit board incorporated in the case.