JPS5984631U

JPS5984631U - Contact detection circuit

Info

Publication number: JPS5984631U
Application number: JP14332883U
Authority: JP
Inventors: 岩井　雄一郎; 川村　「よし」壱; 下井　明雄
Original assignee: セイコーエプソン株式会社
Priority date: 1983-09-16
Filing date: 1983-09-16
Publication date: 1984-06-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案による検出回路を組み込んだ電卓付腕時
計、第２図は第１図におけるタッチスイッチキーボード
の断面図、第３図は電卓部の回路−図、第４図は第３図
のタイミングチャートである。１・・・ケース、２・・・切換スイッチ、３・・・表示
体、４・・・タックスイッチキーボード、５・・・タッ
チ板、６・・・電気絶縁体、７・・・バネ性接続体、８
・・・回路基板、９・・・タッチスイッチ接触検出部、
１０・・・エンコニダ、１１・・・多重入力防止回路、
１２・・・２進化信号発生回路、１３・・・シフトレジ
スタ、１４・・・入力コントロール部、１５・・・読込
用Ｆ／Ｆ、１６・・・演算ＲＯＭ、１７・・・判定用Ｆ
ＩＦ０Figure 1 is a wristwatch with a calculator incorporating the detection circuit according to the present invention, Figure 2 is a sectional view of the touch switch keyboard in Figure 1, Figure 3 is a circuit diagram of the calculator section, and Figure 4 is the same as in Figure 3. This is a timing chart. DESCRIPTION OF SYMBOLS 1... Case, 2... Changeover switch, 3... Display body, 4... Tack switch keyboard, 5... Touch board, 6... Electrical insulator, 7... Spring connection body, 8
... circuit board, 9 ... touch switch contact detection section,
10... Enconida, 11... Multiple input prevention circuit,
12... Binary signal generation circuit, 13... Shift register, 14... Input control section, 15... F/F for reading, 16... Arithmetic ROM, 17... F for judgment
IF0

Claims

[Scope of utility model registration request]

It has a plurality of touch switch input sections 9 using MOS gates as receivers, multiple inputs from the touch switch input sections 9 are input to an encoder section 10, and the output of the encoder section 10 is ORed by the gates of MOS transistors.
The output of the OR connection is input to the input control section 14.
outputs a timing pulse corresponding to the earliest input of the multiple inputs, and the timing pulse is internally input to the multiple input prevention circuit 11 to detect the earliest input signal of the multiple inputs. Features a contact detection circuit.