Portable radiotelephone terminal adaptable to multiple models

• US 5,722,055 A
• Filed: 10/04/1995
• Issued: 02/24/1998
• Est. Priority Date: 02/16/1995
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kobayashi, Hidekatsu, Kubo, Hiroshi, Sakashita, Hiroaki, Tomura, Masashi, Tsukamoto, Yoshifumi, Funaya, Daizo
• Primary Examiner(s): Urban, Edward F.
• Application Number:
  US08/539,006
• Time in Patent Office: 874 Days
• Field of Search: 455/89, 455/90, 455/347, 455/348, 455/349, 455/350, 455/351, 455/128, 455/566, 455/575, 455/301, 361/724, 361/731, 361/736, 361/760, 345/87, 340/815.45, 340/815.49, 379/433
• US Class Current: 455/575.8
• CPC Class Codes: H04M 1/026 Details of the structure or mounting of specific components

Abstract

A portable radiotelephone terminal includes a body assembly which carries out a radio communication, a rear case assembly, and a front case assembly associated with the rear case assembly for enclosing the body assembly. In the portable radiotelephone terminal, the body assembly and the rear case assembly include common parts which are shared by different models of the portable radiotelephone terminal, and the front case assembly includes model-dependent parts which are individually prepared for the different models of the portable radiotelephone terminal.

Claims

1. A portable radiotelephone terminal comprising:

a body assembly including a speaker unit, a microphone unit and switch means which carry out a radio communication;

a rear case assembly; and

a front case assembly associated with said rear case assembly for enclosing said body assembly,

wherein said front case assembly comprises a front case member made of a synthetic resin and side cover portions made of a synthetic elastomer, said front case member and said side cover portions comprising two moldings produced by using a set of cavity and core molds,

wherein said body assembly further comprises a front printed-circuit board, light-emitting diodes provided on side portions of a top of the front printed-circuit board, and a liquid crystal display assembly provided on the top of the front printed-circuit board at a location between said light-emitting diodes,

said liquid crystal display assembly including a bottom member, a frame member, a liquid crystal plate and rubber connectors, said liquid crystal plate and said rubber connectors being placed between said bottom member and said frame member.

2. The portable radiotelephone terminal according to claim 1, wherein said body assembly comprises a volume key module which controls a volume of sound generated by the speaker unit, said volume key module including volume keys provided on a side surface of the body assembly,

wherein said front case member comprises openings in a side surface of the front case member, said volume keys of said volume key module being placed into said openings and thus outwardly projecting from the side surface of the front case member.

3. The portable radiotelephone terminal according to claim 1, wherein said rear case assembly and said front case assembly constitute a case assembly for enclosing said body assembly, said case assembly comprising a side surface on which volume keys used to control a loudness of a sound generated by the speaker unit are provided, and a projection provided between said volume keys on the side surface, said projection having a height from the side surface which is the same as a height of said volume keys from the side surface, thereby preventing said volume keys from being erroneously depressed.

4. A portable radiotelephone terminal comprising:

a body assembly including a speaker unit, a microphone unit and switch means which carry out a radio communication;

a rear case assembly; and

a front case assembly associated with said rear case assembly for enclosing said body assembly,

said body assembly comprising;

a shield case including a flat portion and recessed portions downwardly projecting from a bottom of the flat portion, said recessed portions being provided on peripheral portions of a bottom of the shield case;

a shield packing fitted in grooves of the recessed portions of the shield case, said shield packing being made of a conductive rubber and provided along the recessed portions of the shield case; and

a rear printed-circuit board provided below the shield case, the rear printed-circuit board having a grounding pattern which is in accordance with the recessed portions of the shield case, said grounding pattern being brought into contact with the shield packing,

said rear case assembly comprising a rear case member having a plurality of ribs to which a bottom of the rear printed-circuit board is connected,

wherein said shield case of said body assembly is connected to said rear case assembly such that the bottom of the rear printed-circuit board is pressed by said ribs, a top of the rear printed-circuit board is pressed by the recessed portions of the shield case, and the grounding pattern of the rear printed-circuit board is press fitted to the shield packing.

5. The portable radiotelephone terminal according to claim 4, wherein a pipe portion of an antenna assembly is fitted to one of said ribs, said one of said ribs having supporting portions for supporting the pipe portion of the antenna assembly.

6. The portable radiotelephone terminal according to claim 4, wherein said body assembly further comprises:

a front printed-circuit board, provided above said shield case, which includes locating holes;

locating portions, upwardly projecting from a top of the shield case, which are fitted to the locating holes of the front printed-circuit board;

a key-contact plate, provided on a top of the front printed-circuit board, which includes locating holes to which said locating portions of the shield case are fitted; and

a keypad, provided on a top of the key-contact plate, which includes locating holes to which said locating portions of the shield case are fitted,

wherein said front printed-circuit board, said key-contact plate, and said keypad are located on the shield case by fitting the locating portions of the shield case into the respective locating holes.

7. The portable radiotelephone terminal according to claim 4, wherein said rear case assembly further comprises an antenna assembly attached to the rear case member, said antenna assembly being electrically connected to an antenna circuit of the rear printed-circuit board and comprising:

an antenna power-supply plate connected to the rear case member;

an antenna cylinder connected to said antenna power-supply plate and including a helical coil antenna; and

a rod antenna retractably provided within said antenna cylinder,

said antenna power-supply plate comprising a plate member including a burring portion, said burring portion having a threaded inside wall, said plate member being fitted to the rear case member, and a threaded outside wall of an end portion of said antenna cylinder being fitted to the threaded inside wall of the burring portion.

8. A portable radiotelephone terminal comprising:

a body assembly including a speaker unit, a microphone unit and switch means which carry out a radio communication;

a rear case assembly; and

a front case assembly, connected to said rear case assembly by fastening screws, for enclosing said body assembly,

said body assembly comprising;

a shield case including a flat portion and recessed portions provided on a bottom of the flat portion;

a shield packing fitted in grooves of the recessed portions of the shield case, said shield packing made of a conductive rubber and downwardly projecting from the bottom of the flat portion; and

a rear printed-circuit board provided below the shield case, the rear printed-circuit board having a grounding pattern which is in accordance with the recessed portions of the shield case, said grounding pattern being contacted with the shield packing,

said shield case including holes into which said screws are inserted, said holes provided at corners of the shield case,

said rear case assembly comprising a rear case member which includes a bottom portion, a peripheral wall portion, and a plurality of bosses provided on said bottom portion at locations of the corners of the shield case, said bosses including holes into which said screws are inserted, and said bosses supporting the corners of the shield case,

wherein said corners of said shield case of said body assembly are connected to said rear case assembly and said front case assembly by fastening said screws such that portions of the rear printed-circuit board adjacent to said corners of said shield case are pressed by said rear case member, a top of the rear printed-circuit board is pressed by the recessed portions of the shield case, and the grounding pattern of the rear printed-circuit board is press fitted to the shield packing.

9. The portable radiotelephone terminal according to claim 8, wherein said rear case member of said rear case assembly further includes radially extending ribs each of which radially extends from one of said bosses on the bottom portion of the rear case member.