公开(公告)号：WO1982001852A1

公开(公告)日：1982-06-10

申请号：PCT/US1981001537

申请日：1981-11-19

Applicant: NCR CORP

Inventor： NCR CORP ,  CORDES RICHARD E ,  SEARS RONALD J

IPC: B41J05/12

CPC classification number: B41J5/26 ,  H01H13/50

Abstract: Keyboard (20) having a plurality of keys (12, 14, 16) thereon at least one of which is designated as a critical function key (16), wherein each key is movable from a home position along an actuation path to its operated position and has means (24) for restoring it towards its home position. In prior art keyboards of this kind important data may be lost by accidental actuation of a critical function key, e.g. a "Delete" key. The present invention overcomes this problem by providing a keyboard in which a critical function key (16) has a warning member (40, 60) associated therewith which causes the force required to move the key to its operated position to be significantly greater than that required to move each of the other keys not having a warning member associated therewith. The increase in force provides tactile feedback to an operator of the keyboard before the critical function key's operated position is reached to thereby warn said operator that he is about to operate the key (16). In one embodiment, the warning member (40, 60) is made of resilient material, has a generally washer-like shape, and is positioned around the key stem (18) and under the key cap (26) of the critical function key (16).

Abstract translation: 键盘（20）具有多个键（12,14,16），其中至少一个键被指定为临界功能键（16），其中每个键可以沿着致动路径从原始位置移动到其操作位置 并且具有用于将其恢复到其原始位置的装置（24）。 在这种现有技术的键盘中，重要的数据可能由于关键功能键的意外启动而丢失，例如， 一个“删除”键。 本发明通过提供一种键盘来克服这个问题，其中临界功能键（16）具有与其相关联的警告构件（40,60），其使得将键移动到其操作位置所需的力显着大于所需要的力 以移动其中没有与其相关联的警告构件的每个其他键。 在达到关键功能键的操作位置之前，力的增加向键盘的操作者提供触觉反馈，从而警告操作者他即将操作钥匙（16）。 在一个实施例中，警告构件（40,60）由弹性材料制成，具有大致垫圈状的形状，并且位于关键杆（18）周围的关键功能键的键帽（26）周围 16）。