JP2000049643A - Dual mode portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a distance between mutual antennas, to prevent the contact of the antennas with each other and to reduce mutual interference relating to radiation gain without damaging the design property of the dual mode portable terminal of an attachment system by parallelly arranging the antennas provided on respective case bodies at close parts at the time of mounting the portable terminal. SOLUTION: This portable terminal B is provided with the antenna 13 on the case body at an attachment angle θ from a vertical direction. At the time of mounting the portable terminal B to a main body terminal A, in order to make the antenna 13 of the attachment angle θ be parallel to the antenna 5A of the main body terminal A, an abutting surface 7 for positioning the portable terminal B in a thickness direction is inclined for the same angle θ on the opposite side of the inclination direction of the antenna 13 in the recessed space 1 of the main body terminal A. Thus, the antenna 13 of the portable terminal B mounted to the recessed space 1 is turned to the vertical direction and becomes parallel to the antenna 5A of the main body terminal A and the danger of bringing both antennas into contact with each other is eliminated even at the time of extension/contraction operations of the antenna.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a dual mode portable terminal usable in a plurality of communication systems.

[0002]

2. Description of the Related Art Dual mode portable terminals are, for example, analog mode and digital mode dual mode, TDMA.
Communication and data communication can be performed in a plurality of different communication systems such as a dual mode of a communication system and a CDMA communication system, and a dual mode of a mobile satellite telephone system such as Iridium and a terrestrial portable telephone system such as GSM.

In such a dual mode portable terminal,
A plurality of wireless transmission / reception units and the like must be provided in a single terminal, which inevitably increases the size. As an invention to solve such problems, the present applicant has applied for a dual mode mobile terminal having a mobile satellite communication terminal function and a terrestrial mobile terminal function (Japanese Patent Application No. 9-61909, "Dual mode mobile radio terminal"). Are doing. FIG. 2 shows this conventional dual mode portable terminal, where A is an attachment having an iridium satellite communication terminal function, and B is a portable terminal such as a PHS or cellular having a terrestrial mobile terminal function, which is used as a terrestrial mobile terminal. In this case, carry only the mobile terminal B,
When used as an iridium satellite communication terminal, the portable terminal B is attached to the concave space 1 of the attachment A (FIG. 2).
(C)) before use. At the time of attachment, the slide button 2 provided on the attachment A is moved, and the portable terminal B is sandwiched and held by the engagement projection 4. The mobile terminal B can independently perform a telephone call and data communication even when not attached to the attachment A. The attachment A does not include a key operation unit, a display unit, and a transmission / reception unit, and uses a transmission / reception unit, a display unit, and a key operation unit of the attached mobile terminal B as an iridium satellite communication terminal. The signal transmission between the attachment A and the mobile terminal B is as follows.
Connector and attachment A provided on bottom surface of mobile terminal B
Is converted to PCM data. The tip of the connector 3 moves into the concave space 1 by moving the slide button 2. In the mounted state, both the mobile terminal B and the attachment A can communicate with each other, and the waiting is simultaneously waiting for calls from both communication systems.
When dialing, the selection button 17F is used to select whether communication with the satellite by the attachment A or communication with the terrestrial wave by the portable terminal B is performed.

FIG. 3 is an internal block diagram of such a dual mode portable terminal. Connector 3 for satellite communication
12 are connected, and the speaker 33 and the microphone 3 of the portable terminal B are connected.
4. Key operation unit 35 (15, 16, 17), display unit 14
Is used, and wireless communication with the satellite is performed by the wireless unit 42 and the antenna 5A.

[0005]

When the conventional dual mode portable terminal shown in FIGS. 2 and 3 is implemented, the antenna 5A of the attachment A and the portable terminal B are used for design reasons.
Antenna 13 in many cases. However, as shown in FIG. 4, the portable terminal B may be attached to the housing at an angle (attachment angle θ) in order to separate the antenna far from the human body, and the portable terminal B is attached to the attachment A.
Is attached, there is a possibility that the antenna of the portable terminal B contacts the antenna 5A. In particular, in the case of a telescopic antenna, there is a high possibility of contact.

[0006]

According to the present invention, at least a transmitting / receiving section, a display section,
A portable terminal having a key operation unit and a wireless transmitting / receiving unit for communicating with the first wireless communication system, and a holder unit for detachably mounting the portable terminal and communicating with the second wireless communication system. The portable terminal alone can perform a telephone call and / or data communication using the first wireless communication system, and furthermore, the portable terminal is attached to the attachment to perform the transmission / reception. A dual-mode portable terminal capable of making a call and / or data communication using the second wireless communication system using the unit, the display unit, and the key operation unit, is provided on each housing when the portable terminal is mounted. The antennas were arranged in parallel at nearby locations.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, wherein FIG.
(B) is a mounting state diagram of the dual mode portable terminal, and the same parts as those in FIG. The dual mode portable terminal of the present embodiment relates to the improvement of FIGS. 3 and 4 of the conventional example, and the drawing is simplified for describing the improvement.

In the portable terminal B, the antenna 13 is inclined at a mounting angle θ from a vertical direction on a housing. When the portable terminal B is attached to the attachment A, the concave space (holder portion) 1 of the attachment A is thick as shown in FIG. Contact surface 7 for positioning mobile terminal B in the direction
Are tilted by the same angle θ in the direction opposite to the tilt direction of the antenna 13. Therefore, the antenna 13 of the portable terminal B mounted in the recessed space 1 is oriented in the vertical direction and is parallel to the antenna 5A of the attachment A as shown in FIG. There is no danger of contact. Thus, it is only necessary to incline the contact surface 7 on the holder-type attachment A side, and the portable terminal B does not need to have a complicated attachment structure. The antenna 5A of the attachment A is vertically attached to the housing, but the user presses the earpiece speaker 33 against his ear so that the antenna 13 of the portable terminal B is inclined and away from the human head during a call. The antenna 5A parallel to 13 also automatically moves away from the human body during a call. Therefore, it is not necessary to tilt the antenna 5A on the attachment A side.

[0009]

According to the present invention, there is provided a portable terminal having at least a transmission / reception unit, a display unit, and a key operation unit and a wireless transmission / reception unit for communicating with the first wireless communication system. And an attachment having a wireless transmission / reception unit for communicating with the second wireless communication system having a holder unit attached to the mobile terminal, and the mobile terminal alone uses the first wireless communication system to make a call and / or data. A dual-mode portable terminal capable of performing communication, and further performing a call and / or data communication using a second wireless communication system using the transmission / reception unit, the display unit, and the key operation unit by attaching a portable terminal to the attachment. In mounting the portable terminal, the antennas provided on the respective housings are arranged in parallel at intervals in the vicinity, so that the attachment type Without impairing the design of the Yuarumodo portable terminal, thereby reducing the mutual interference relates prevented to thus radiation gain the contact of the antenna with each other can be ensured distance between each other of the antenna.

[Brief description of the drawings]

FIGS. 1A and 1B show an embodiment of a dual mode portable terminal according to the present invention, in which FIG.

2 (a) and 2 (b) are perspective views of an attachment, and FIG. 2 (c) is a view of a state where the mobile terminal is mounted, in a conventional dual mode mobile terminal.

FIG. 3 is an internal block diagram of a conventional dual mode portable terminal.

FIG. 4A is a perspective view and FIG. 4B is a side view of a conventional portable terminal.

[Explanation of symbols]

 A: Main body terminal B: Mobile terminal 1: Depressed space (holder) 2: Slide button 3, 12: Connector 4: Engagement protrusion 5A, 13: Antenna 7: Contact surface 14: Display unit 15: Call key ( Key operation part) 16: Numeric keypad (Key operation part) 17: Function key (Key operation part) 17F: Select key 33: Earpiece speaker 34: Microphone

Claims (2)

[Claims] 1. A portable terminal having at least a transmission / reception unit, a display unit, and a key operation unit and having a wireless transmission / reception unit for communicating in a first wireless communication system, and a holder for detachably mounting the portable terminal. And an attachment having a wireless transmission / reception unit for communicating with the second wireless communication system having the unit. The mobile terminal alone can perform a call and / or data communication using the first wireless communication system, A dual-mode portable terminal, further comprising a portable terminal attached to the attachment and capable of performing a call and / or data communication using a second wireless communication system using the transmission / reception unit, the display unit, and the key operation unit. A dual-mode portable terminal, wherein antennas provided on respective housings are arranged in parallel at neighboring places when the terminal is mounted. 2. The portable terminal includes an antenna mounted on a housing at an angle of attachment θ from a vertical direction, and a holder portion of the attachment holds the housing of the mobile terminal in a direction opposite to the angle from a vertical position. The dual-mode portable terminal according to claim 1, wherein the antenna has a housing abutting surface that is attached at an angle θ and the antennas are arranged in parallel.