JP2674914B2 - Radio selective call receiver - Google Patents

Radio selective call receiver

Info

Publication number
JP2674914B2
JP2674914B2 JP3308641A JP30864191A JP2674914B2 JP 2674914 B2 JP2674914 B2 JP 2674914B2 JP 3308641 A JP3308641 A JP 3308641A JP 30864191 A JP30864191 A JP 30864191A JP 2674914 B2 JP2674914 B2 JP 2674914B2
Authority
JP
Japan
Prior art keywords
selective call
connection
radio selective
external device
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP3308641A
Other languages
Japanese (ja)
Other versions
JPH05235827A (en
Inventor
政彰 森島
喜義 大畑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP3308641A priority Critical patent/JP2674914B2/en
Priority to GB9224699A priority patent/GB2262002B/en
Publication of JPH05235827A publication Critical patent/JPH05235827A/en
Application granted granted Critical
Publication of JP2674914B2 publication Critical patent/JP2674914B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827Portable transceivers
    • GPHYSICS
    • G04HOROLOGY
    • G04CELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/001Electromechanical switches for setting or display
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2207/00Connections
    • H01H2207/026Pressure contact
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00Actuators

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は無線選択呼出受信機に関
し、特に外部から無線による選択呼出を受けて文字デー
タを受信し、これを表示するとともに、この表示内容の
印字出力可能な外部装置と接続して運用する無線選択呼
出受信機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver, and more particularly to an external device capable of receiving character data by receiving a radio selective call from the outside, displaying the character data, and printing out the display content. The present invention relates to a radio selective call receiver that is connected and operated.

【0002】[0002]

【従来の技術】無線選択呼出受信機としては、代表的な
ものとしてポケットベルがある。近時これら受信機と外
部装置の接続による高機能化が進み、文字データ受信表
示および印字出力も可能とするものも出現している。
2. Description of the Related Art As a typical radio selective call receiver, there is a pager. In recent years, the functionalities of these receivers and external devices have been improved, and some of them have become capable of receiving and displaying character data and printing output.

【0003】従来の、この種の無線選択呼出受信機の一
例を図9に示す。図9に示す無線選択呼出受信機1は、
アンテナを内蔵して選択受信により文字データを受け表
示部2に表示する。また、筺体前面には動作機能を切り
替える3つの機能切替用のスイッチ38,39および4
0を備えている。これらの各スイッチは、電源のオン・
オフや動作のリセット,モード設定などに利用されてい
る。
An example of a conventional radio selective calling receiver of this type is shown in FIG. The radio selective calling receiver 1 shown in FIG.
An antenna is built in and character data is received by selective reception and displayed on the display unit 2. Further, on the front surface of the housing, there are three function switching switches 38, 39 and 4 for switching operation functions.
0 is provided. Each of these switches
It is used for turning off, resetting operation, and mode setting.

【0004】図9に示す3つの穴、すなわち外部接続端
子用穴41,42および43は、無線選択受信機1の表
示部2に表示されている内容をハードコピイとして印字
出力すべく外部装置と接続する場合に、外部装置の接続
端子を導入して外部装置との印字運用接続を行なう場合
に利用される。
The three holes shown in FIG. 9, that is, the external connection terminal holes 41, 42 and 43 are connected to an external device so that the contents displayed on the display unit 2 of the wireless selective receiver 1 can be printed out as a hard copy. In this case, it is used when introducing a connection terminal of an external device and making a print operation connection with the external device.

【0005】図10は、外部装置との接続構造を示し、
無線選択呼出受信機1は外部装置の接続端子としての外
部装置接続ピン44,45および46を、外部接続端子
用穴41,42および43を通して内部の外部接続端子
Tと結合、これにより外部装置と無線選択呼出受信機1
との印字運用接続を確保する。
FIG. 10 shows a connection structure with an external device,
The radio selective calling receiver 1 couples the external device connecting pins 44, 45 and 46 as the connecting terminals of the external device with the internal external connecting terminal T through the holes 41, 42 and 43 for the external connecting terminals, thereby connecting the external device to the external device. Radio selective call receiver 1
Secure the print operation connection with.

【0006】なお、図10の場合、外部装置は印字プリ
ンタが利用され、かつ外部ピン44,45および46は
スプリングで付勢された構造のものが利用されている。
In FIG. 10, a print printer is used as the external device, and the external pins 44, 45, and 46 have a structure biased by a spring.

【0007】[0007]

【発明が解決しようとする課題】上述した従来の無線選
択呼出受信機は、外部装置との接続を可能とするものに
あっては、ケースに外部装置に対する端子導入用の穴を
設けることが必要となり、さらに、ケース内部に設ける
金属性の外部接続端子Tは、外部にも露出した状態で配
置されるので、静電気に対する装置の耐圧劣化を招き、
かつ人為的ないたずら等の接触に対しても無防備である
という欠点がある。
If the above-mentioned conventional radio selective call receiver is capable of connecting to an external device, it is necessary to provide a hole for introducing a terminal to the external device in the case. In addition, since the metallic external connection terminal T provided inside the case is arranged so as to be exposed to the outside, the breakdown voltage of the device against static electricity is deteriorated,
In addition, it has a drawback that it is vulnerable to contact such as artificial mischief.

【0008】本発明の目的は上述した欠点を除去し、ケ
ースの一部に外部装置との接続用の穴を空けることなく
接続を可能とし、静電気に対する耐圧劣化を抑圧し、か
つ人為的ないたずらも排除しうる無線選択呼出受信機を
提供することにある。
The object of the present invention is to eliminate the above-mentioned drawbacks, to enable connection without making a hole for connecting to an external device in a part of the case, to suppress deterioration of withstand voltage against static electricity, and to perform an artificial mischief. It is to provide a radio selective call receiver that can be eliminated.

【0009】[0009]

【課題を解決するための手段】本発明の無線選択呼出受
信機は、外部から無線による選択呼出を受けて受信した
文字データを表示し、かつ表示内容の印字出力可能な外
部装置と接続して運用する無線選択呼出受信機におい
て、筺体表面に配設した複数の機能切替スイッチのツマ
ミを導電性材料で形成し、前記ツマミを介して前記外部
装置との運用接続を可能とした構成を有する。
A wireless selective calling receiver of the present invention is connected to an external device capable of displaying character data received by receiving a selective calling by radio from the outside and printing output of display contents. In the radio selective call receiver to be operated, the knobs of a plurality of function changeover switches arranged on the surface of the housing are formed of a conductive material, and the operation connection with the external device is possible through the knobs.

【0010】また本発明の無線選択呼出受信機は、前記
ツマミが、通常状態では前記機能切替スイッチの端子と
接続状態に保持され、前記ツマミと前記機能切替スイッ
チの端子のそれぞれに接続された回路の接続を確保し、
押下し状態では前記機能切替スイッチの端子との接続状
態を断として前記ツマミと前記機能切替スイッチの端子
のそれぞれに接続された回路の接続を断とする構成を有
する。
Further, in the radio selective calling receiver of the present invention, the knob is held in a connection state with a terminal of the function changeover switch in a normal state, and a circuit connected to each of the knob and the terminal of the function changeover switch. Secure the connection of
In the depressed state, the connection state with the terminal of the function changing switch is cut off, and the circuit connected to each of the knob and the terminal of the function changing switch is cut off.

【0011】[0011]

【実施例】次に、本発明について図面を参照して説明す
る。
Next, the present invention will be described with reference to the drawings.

【0012】図1は本発明の一実施例を斜視図である。FIG. 1 is a perspective view of an embodiment of the present invention.

【0013】図1に示す実施例は、表示部2のほかにそ
れぞれオン,リセットおよびモード選択の切替を行う導
電性材料のツマミを有する、スイッチ3,4および5を
備えた無線選択呼出受信機1として構成される。
The embodiment shown in FIG. 1 is a radio selective call receiver provided with switches 3, 4 and 5 each having a knob of a conductive material for switching on, reset and mode selection in addition to the display section 2. It is configured as 1.

【0014】スイッチ3,4および5の図1に見られる
ツマミは導電性材料で作られ、各スイッチは、この導電
性材料のツマみを介して無線選択呼出受信機1内蔵の制
御部と、外部装置との接続スイッチングを行なう。
The knobs of the switches 3, 4 and 5 shown in FIG. 1 are made of a conductive material, and each switch has a control section built in the radio selective call receiver 1 through a knob of the conductive material. Performs connection switching with external devices.

【0015】図2は、図1のスイッチ3,4および5の
内部接続を示す回路図である。
FIG. 2 is a circuit diagram showing the internal connection of the switches 3, 4 and 5 of FIG.

【0016】スイッチ3,4および5はそれぞれ接点
7,8,9,10および11,12を有し、接点7,9
および11がグランドレベル(ロウレベル)となること
で無線選択呼出受信機1の動作をオフに制御するように
制御部6によって図示しない無線部が制御される。図2
において、各接点に対するグランドレベルの設定によっ
て外部装置との信号授受が可能となるこの状態を図3に
示す。
Switches 3, 4 and 5 have contacts 7, 8, 9, 10 and 11, 12 respectively, and contacts 7, 9
The wireless unit (not shown) is controlled by the control unit 6 so as to control the operation of the wireless selective calling receiver 1 to be off when the signals 11 and 11 become the ground level (low level). FIG.
FIG. 3 shows this state in which signals can be exchanged with an external device by setting the ground level for each contact.

【0017】図4は、図1のスイッチ3,4および5の
動作のフローチャートである。
FIG. 4 is a flow chart of the operation of the switches 3, 4 and 5 of FIG.

【0018】スイッチ3,4および5の各スイッチは通
常ハイレベル状態を保持しているが、これらスイッチが
押下されると各入力レベルはグランドレベルのロウレベ
ルに設定される。このような動作内容をステップ101
〜ステップ104として示す。
Each of the switches 3, 4 and 5 normally holds a high level state, but when these switches are pressed, each input level is set to a low level of the ground level. Such operation contents are described in step 101.
~ Shown as step 104.

【0019】図5は、外部装置との接続状態を示す正面
図で、図1に示す無線選択呼出受信機1が外部装置とし
てプリンタ装置20に設けた接続ポケット22に収納さ
れて、スイッチ3,4,5のツマミを介して電気的に接
続し、表示部2に表示されている内容をハードコピイ2
1として出力している状態を示す。この場合、各スイッ
チ3,4および5は、無線選択呼出受信機1がプリンタ
装置20の設定ポケット22に嵌入されることにより、
信号の授受が可能な状態となり、動作状態となる。
FIG. 5 is a front view showing a connection state with an external device. The radio selective calling receiver 1 shown in FIG. 1 is housed in a connection pocket 22 provided in the printer device 20 as an external device, and the switches 3 and 3 are accommodated. The contents displayed on the display unit 2 are electrically connected via the knobs 4 and 5 and the hardware copy 2
The output state is 1. In this case, the switches 3, 4 and 5 are connected to the setting pocket 22 of the printer device 20 when the radio selective calling receiver 1 is inserted,
A signal can be sent and received, and the operation state is set.

【0020】図6に示すように、設定ポケット22に嵌
入した無線選択呼出受信機1のスイッチ、たとえばスイ
ッチ5は、導電性材料で構成されたツマミが、プリンタ
装置20の内部に設けた接続端子23と接触する。接続
端子23の接触部分も導電性材料で構成され、プリンタ
装置20を印字動作に駆動する回路接続が他のスイッチ
3,4とともになされる。従って、無線選択呼出受信機
1をプリンタ装置20の設定ポケットに嵌入することに
より、表示部2の表示内容のハードコピイ21がとれる
こととなる。
As shown in FIG. 6, the switch of the radio selective call receiver 1 fitted in the setting pocket 22, for example, the switch 5, has a connection terminal provided inside the printer device 20 as a knob made of a conductive material. Contact with 23. The contact portion of the connection terminal 23 is also made of a conductive material, and the circuit connection for driving the printer device 20 in the printing operation is made together with the other switches 3 and 4. Therefore, by inserting the radio selective calling receiver 1 into the setting pocket of the printer device 20, the hardware copy 21 of the display content of the display unit 2 can be taken.

【0021】図7に、外部装置であるプリンタ装置20
の接続端子23と、スイッチ5との接触導入状態を示
す。無線選択呼出受信機1をプリンタ装置20の設定ポ
ケット22に嵌入することにより、プリンタ装置20の
接続端子23が、矢印に示す如く、スイッチ5との接触
状態に入ることを示す。
FIG. 7 shows a printer device 20 which is an external device.
The contact introduction state between the connection terminal 23 and the switch 5 is shown. By inserting the radio selective call receiver 1 into the setting pocket 22 of the printer device 20, the connection terminal 23 of the printer device 20 is brought into contact with the switch 5 as indicated by the arrow.

【0022】図8にスイッチ動作を示す、図8(a)は
スイッチが外部装置の接続端子と接触状態にあり、スイ
ッチツマミ33は強い押下力が加わらず、スイッチ金具
32とスイッチアース金具34とは離れ、外部との信号
交換が導電性のスイッチツマミ33を介して可能とな
り、無線選択呼出受信機1の制御部6と外部装置のプリ
ンタ装置20が接続状態に保たれる。
FIG. 8 shows the switch operation. In FIG. 8 (a), the switch is in contact with the connection terminal of the external device, the switch knob 33 does not receive a strong pressing force, and the switch metal fitting 32 and the switch ground metal fitting 34 are connected. After that, signal exchange with the outside becomes possible through the conductive switch knob 33, and the control unit 6 of the radio selective call receiver 1 and the printer device 20 of the external device are kept connected.

【0023】図8の(b)はスイッチツマミ33を押下
した時の状態を示し、この状態では金属性のバネ状スイ
ッチ金具32は反転し、スイッチアース金具34と接続
し、従って、外部との信号交換は行なわれない。
FIG. 8 (b) shows a state in which the switch knob 33 is pushed down. In this state, the metallic spring-like switch fitting 32 is inverted and connected to the switch ground fitting 34, so that it is connected to the outside. No signal exchange takes place.

【0024】このようにして、無線選択呼出受信機の機
能を切り替える各スイッチのツマミを導電性材料で構成
し、かつこのツマミとスイッチの端子とを電気的に接続
した状態で、外部装置の接続端子と無線選択呼出受信機
との接続をオン,オフさせることにより、外部装置との
接続のための穴をケースに配設する必要をなくし、従っ
て静電気耐圧性の劣化も抑止できる。
In this manner, the knob of each switch for switching the function of the radio selective call receiver is made of a conductive material, and the knob and switch terminal are electrically connected to each other to connect an external device. By turning on / off the connection between the terminal and the radio selective call receiver, it is not necessary to provide a hole for connection with an external device in the case, and therefore deterioration of electrostatic withstand voltage can be suppressed.

【0025】[0025]

【発明の効果】以上説明したように本発明は、無線選択
呼出受信機の機能切替スイッチのツマミを介して外部と
の信号の授受を可能とすることにより、専用の外部端子
用の穴を受信機ケースの一部に配設する必要がなくな
り、かつ直接静電気の侵入する外部接続端子が無く、代
わりにあるインピーダンスを持つスイッチのツマミによ
り、静電気耐圧の劣化も抑圧できるという効果がある。
As described above, according to the present invention, it is possible to send and receive a signal to and from the outside through the knob of the function changeover switch of the radio selective call receiver, so that the dedicated hole for the external terminal is received. There is an effect that it is not necessary to dispose it in a part of the machine case, there is no external connection terminal through which static electricity directly enters, and instead the deterioration of the electrostatic withstand voltage can be suppressed by the knob of the switch having a certain impedance.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例の無線選択呼出受信機の斜視
図である。
FIG. 1 is a perspective view of a radio selective calling receiver according to an embodiment of the present invention.

【図2】図1におけるスイッチ3,4および5の内部接
続を示す回路図である。
FIG. 2 is a circuit diagram showing the internal connection of switches 3, 4 and 5 in FIG.

【図3】図1におけるスイッチ3,4および5の外部接
続を示す回路図である。
3 is a circuit diagram showing an external connection of switches 3, 4 and 5 in FIG.

【図4】図1におけるスイッチ3,4および5の動作の
フローチャートである。
4 is a flowchart of the operation of switches 3, 4 and 5 in FIG.

【図5】図1の実施例の無線選択呼出受信機と外部装置
との接続状態を示す正面図である。
5 is a front view showing a connection state between the radio selective calling receiver and the external device of the embodiment of FIG. 1. FIG.

【図6】図1の実施例の無線選択呼出受信機の外部装置
との接続状態における断面図である。
FIG. 6 is a cross-sectional view of the wireless selective call receiver of the embodiment of FIG. 1 in a connected state with an external device.

【図7】スイッチと外部装置の接続動作の説明図であ
る。
FIG. 7 is an explanatory diagram of a connection operation between a switch and an external device.

【図8】スイッチの動作を説明する断面図である。FIG. 8 is a cross-sectional view illustrating the operation of the switch.

【図9】従来の無線選択呼出受信機の斜視図である。FIG. 9 is a perspective view of a conventional radio selective calling receiver.

【図10】従来の無線選択呼出受信機の外部接続構造を
示す部分斜視図である。
FIG. 10 is a partial perspective view showing an external connection structure of a conventional radio selective calling receiver.

【符号の説明】[Explanation of symbols]

1 無線選択呼出受信機 2 表示部 3,4,5 スイッチ 6 制御部 7〜12 接点 13,14,15 プルアップ抵抗 16 電源 17,18,19 外部接続端子 20 プリンタ装置21 ハードコピイ 22 設定ポケット 23 接続端子 30 ケース 31 スイッチ本体 32 スイッチ金具 33 スイッチツマミ 34 スイッチアース金具 35 プリント配線基板 36 制御部6との接続端子 38,39,40 スイッチ 41,42,43 外部接続端子用穴 44,45,46 外部装置接続ピン 1 Radio selective call receiver 2 Display section 3, 4, 5 switch 6 Control section 7 to 12 contacts 13, 14, 15 Pull-up resistance 16 Power supply 17, 18, 19 External connection terminal 20 Printer device 21 Hard copy 22 Setting pocket 23 Connection Terminal 30 Case 31 Switch main body 32 Switch metal fitting 33 Switch knob 34 Switch ground metal fitting 35 Printed wiring board 36 Connection terminal with control unit 38, 39, 40 Switch 41, 42, 43 External connection terminal hole 44, 45, 46 External Device connection pin

フロントページの続き (56)参考文献 特開 昭63−24727(JP,A) 実開 平2−43038(JP,U) 実開 平3−2751(JP,U)Continuation of the front page (56) References JP-A-63-24727 (JP, A) Actual flat 2-43038 (JP, U) Actual flat 3-2751 (JP, U)

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 外部から無線による選択呼出を受けて受
信した文字データを表示し、かつ表示内容の印字出力可
能な外部装置と接続して運用する無線選択呼出受信機に
おいて、筺体表面に配設した複数の機能切替スイッチの
ツマミを導電性材料で形成し、前記ツマミを介して前記
外部装置との運用接続を可能としたことを特徴とする無
線選択呼出受信機。
1. A wireless selective call receiver which displays character data received by wireless selective call from the outside and which is operated by being connected to an external device capable of printing and outputting display contents, is disposed on the surface of a housing. A radio selective call receiver, wherein the knobs of the plurality of function changeover switches are formed of a conductive material, and the operation connection with the external device is possible through the knobs.
【請求項2】 前記ツマミが、通常状態では前記機能切
替スイッチの端子と接続状態に保持され、前記ツマミと
前記機能切替スイッチの端子のそれぞれに接続された回
路の接続を確保し、押下し状態では前記機能切替スイッ
チの端子との接続状態を断として前記ツマミと前記機能
切替スイッチの端子のそれぞれに接続された回路の接続
を断とすることを特徴とする請求項1記載の無線選択呼
出受信機。
2. The knob is held in a connected state with a terminal of the function changeover switch in a normal state, and a connection between a circuit connected to the knob and a circuit connected to each terminal of the function changeover switch is ensured and a depressed state is maintained. 2. The radio selective call reception according to claim 1, wherein the connection state with the terminal of the function changeover switch is cut off, and the connection between the knob and the circuit connected with each terminal of the function changeover switch is cut off. Machine.
JP3308641A 1991-11-25 1991-11-25 Radio selective call receiver Expired - Fee Related JP2674914B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3308641A JP2674914B2 (en) 1991-11-25 1991-11-25 Radio selective call receiver
GB9224699A GB2262002B (en) 1991-11-25 1992-11-25 Portable radio receiver with display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3308641A JP2674914B2 (en) 1991-11-25 1991-11-25 Radio selective call receiver

Publications (2)

Publication Number Publication Date
JPH05235827A JPH05235827A (en) 1993-09-10
JP2674914B2 true JP2674914B2 (en) 1997-11-12

Family

ID=17983506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3308641A Expired - Fee Related JP2674914B2 (en) 1991-11-25 1991-11-25 Radio selective call receiver

Country Status (2)

Country Link
JP (1) JP2674914B2 (en)
GB (1) GB2262002B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4335023C2 (en) * 1993-10-14 1998-07-16 Deutsche Telekom Ag Adapter for connecting the Cityruf receiver to the Cityruf printer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137783B (en) * 1983-03-10 1987-02-25 Casio Computer Co Ltd Electronic equipment with touch switches
JPS6167295A (en) * 1984-09-10 1986-04-07 日本電気株式会社 Housing structure of radio wave device
US4773032A (en) * 1984-11-20 1988-09-20 Fujitsu Limited Terminal input apparatus
JPH032751U (en) * 1989-05-31 1991-01-11

Also Published As

Publication number Publication date
GB9224699D0 (en) 1993-01-13
GB2262002A (en) 1993-06-02
JPH05235827A (en) 1993-09-10
GB2262002B (en) 1995-09-06

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