Multi-position slide switch assembly with housing means holding common conductive rail in fixed abutting relationship with end terminals of fixed contact array |
|||||||
| 申请号 | US37663873 | 申请日 | 1973-07-05 | 公开(公告)号 | US3857000A | 公开(公告)日 | 1974-12-24 |
| 申请人 | TEXAS INSTRUMENTS INC; | 发明人 | BOULANGER H; | ||||
| 摘要 | A desktop keyboard for data encoders, calculators and the like comprises an electrically insulative board having a plurality of contact members and mounting clusters of key switches to provide electrical engagement between pairs of contact members. A plurality of multiposition point switches are also mounted on the board and comprise a contact element slidably movable to any one of a plurality of contact members to provide a selected mode of operation. An electrically conductive retainer plate is held in fixed abutting relationship with the outermost printed circuit board fixed contacts by means of attachment of the housing to the printed circuit board. The contact element is retained in each mode of operation by indexing means and is continuously electrically connected with the retainer plate. | ||||||
| 权利要求 | 1. A multiposition switch comprising a base, a plurality of stationary contacts mounted on the base electrically separated from one another and arranged in a row, a housing mounted on the base over the row of stationary contacts, a slide member, means for slidably mounting the slide member on the housing, the slide member slidable to and from a plurality of stable positions, an electrically conductive retainer mounted in the housing and electrically connected to one of the contacts in the row, a movable contact member disposed in the housing, the movable contact member in continuous electrical connection with the electrically conductive retainer, means operatively connecting the movable contact member with the slide member for movement therewith, the movable contact member being in electrical engagement with another respective stationary contact when the slide member is in each of its stable positions. 2. A multiposition switch according to claim 1 in which a row of detents is formed in a surface of the slide member and movable spring biased retaining means is mounted in the housing and is aligned with the row of detents so That the retaining means moves into each detent upon presentation of each detent to the retaining means. 3. A multiposition switch according to claim 1 in which the electrically conductive contact retainer is disposed over the row of stationary contacts and the movable contact member is resilient and is located intermediate the contact retainer and the row of stationary contacts. 4. A multiposition switch comprising a base, a plurality of stationary contacts mounted on the base electrically separated from one another and arranged in a row, a housing mounted on the base over the row of stationary contacts, a slide member slidably mounted on the housing, the slide member slidable to and from a plurality of stable positions, an electrically conductive contact retainer disposed in the housing, the contact retainer being an elongated plate having an L-shaped portion at each end, each L-shaped portion comprising first and second legs, the first leg supporting the plate and the second leg spacing the plate above the base, a movable contact member disposed in the housing, the movable contact member in continuous electrical connection with the electrically conductive retainer, means mounted in the housing operatively connecting the movable contact member with the slide member for movement therewith, the movable contact member being in electrical engagement with a respective stationary contact when the slide member is in each of its stable positions. 5. A multiposition switch according to claim 4 in which a longitudinally extending slot is formed in the elongated plate and the means operatively connecting the movable contact member with the slide member includes a leg depending from the slide member through the slot and terminating at the movable contact. 6. A multiposition switch according to claim 4 in which the movable contact has two convex undulated surfaces joined by a concave undulated surface, the convex undulations in wiping contact with the contact retainer plate, the bottom surface of the concave undulation adapted to engage the row of stationary contacts, and a slot is formed in the retainer plate through which extends the leg depending from the slide member. 7. A multiposition switch according to claim 6 in which the base comprises an electrically insulative board having first and second opposed surfaces, two rows of apertures extend from the first to the second surface, the row of stationary contacts comprises electrically conductive staple elements having a bight portion connecting legs, the legs received in respective apertures. 8. A multiposition switch according to claim 7 in which a printed circuit is disposed on the second surface of the base and the legs of the staples terminate in electrical connection with selected portions of the circuit. 9. A multiposition point switch comprising a housing, an electrically insulative board having first and second opposed surfaces, a row of pairs of apertures extending from the first to the second surfaces, a printed circuit formed on the second surface, electrically conductive U-shaped contact elements having a bight portion joining two legs, the legs of the U-shaped element received in respective pairs of apertures, at least certain ones of the legs terminating in electrical connection with selected portions of the printed circuit, a movable contact retainer plate disposed in the housing having a tab portion at two opposite ends, means for mounting the retainer plate so that the tab portions are received on the bight of the two extreme U-shaped contact elements of the row, a portion of the movable contact retainer plate intermediate the tabs being spaced above the bights of the remainder of the U-shaped contact elements of the row, a resilient movable generally wave shaped contact plate disposed intermediate the retainer plate and the board in wiping contact with the retainer plate and the board, the movable contact plate adapted to engage any single selected bight of the said remainder of the U-shAped contact elements, and means mounted in the housing to move the movable contact plate to any selected bight of the said remainder of the U-shaped contact element, one of the said extreme U-shaped contact elements of the row being in electrical connection with the printed circuit. 10. A multiposition switch according to claim 9 in which the means for moving the movable contact includes a slide member mounted in the housing, a leg depending from the slide member connected to the movable contact plate for movement therewith, and indexing means to indicate the position of the slide when the movable contact plate is in electrical engagement with a selected bight of the said remainder of U-shaped contact elements of the row. 11. A multiposition switch according to claim 10 in which the indexing means also includes movable retaining means to render a plurality of stable positions of the slide member. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈