公开(公告)号：US3735058A

公开(公告)日：1973-05-22

申请号：US3735058D

申请日：1971-09-15

Applicant: ADDMASTER CORP

Inventor： BERRY W

IPC: H01H1/24 ,  H01H15/04 ,  H01H1/34

CPC classification number: H01H1/242

Abstract: A key operated switch incorporated with a printed circuit board having conductors thereon and an upwardly extending conical post of non-conducting material between adjacent terminals of certain of the conductors. An expandable toroidal contact spring surrounds the post and is normally located above the conductors by virtue of its constriction against the conical surface. A depressible key member, which is normally held in raised position by the contact spring, is effective upon depression to move the spring into bridging contact with the conductors.

Abstract translation: 一种键操作开关，其结合有具有导体的印刷电路板和在某些导体的相邻端子之间的不导电材料的向上延伸的锥形柱。 可膨胀的环形接触弹簧围绕柱，并且通常位于导体之上，因为其对锥形表面的收缩。 通常由接触弹簧保持在升高位置的可按键构件在按压时有效，以使弹簧与导体桥接接触。

公开(公告)号：US3732387A

公开(公告)日：1973-05-08

申请号：US3732387D

申请日：1971-10-22

Applicant: ADDMASTER CORP

Inventor： BERRY W

IPC: H01H1/24 ,  H01H1/20 ,  H01H13/52

CPC classification number: H01H1/242

Abstract: A key switch incorporated with a printed circuit board having conductors thereon and a bearing member loosely fitted in a hole formed between adjacent terminal ends of the conductors. A depressible key is slideable in the bearing member and has a generally conical surface engaging an expandable toroidal contact spring member which rests on an outwardly tapering surface of the bearing member. As the key is depressed the conical surface thereof expands the spring member downwardly over the surface of the bearing member and into bridging contact with the conductors.

Abstract translation: 一种与其上具有导体的印刷电路板结合的钥匙开关，以及松散地装配在形成在导体的相邻末端之间的孔中的轴承构件。 可按压的键可在支承构件中滑动并且具有大致锥形的表面，该表面接合可延伸的环形接触弹簧构件，该弹性构件搁置在支承构件的向外渐缩的表面上。 当键被按压时，其锥形表面使弹簧构件向下延伸到轴承构件的表面上并与导体桥接。