| 摘要 |
1,082,393. Adjustable seats. DEMARIALAPIERRE & MOLLIER. March 8, 1965 [Nov. 13, 1964], No. 9728/65. Heading A4J. [Also in Division E2] A device for clamping against relative rotational movement two pieces 202, 201, e.g. a tiltable seat back and its mounting, mounted about a common rotation shaft 203 comprises a channel 205 in the piece 202 extending in a plane perpendicular to the shaft 203, with movable members 206 located in the channel and able to move therein, a stop member supported by the piece 201 at a stationary location thereof and inserted in the channel, and control means which on the one hand move, immobilize and jam the members 206 against one another and the walls of the channel, the width and shape of the channel as well as the relative dimensions of the movable members 206 being such that the members 206 and the stop member are thus locked in the channel and that the two pieces 201, 202 are consequently clamped against relative rotational movement, and on the other hand, unlock and release the members 206 and the stop member to allow said relative rotational movement. As described the members 206 are in the form of rollers 206 held in the channel by a side piece 216 secured to the piece 202, and the side piece 216 and piece 202 have semi-circular slots 222, 214 respectively overlying the channel 205. Stops 208 are formed by rollers sliding in the channel and having projections 208a which extend through the slots 222, and 214, and carry collars 209 engaged by cams 210 pivoted on a pin which is mounted in the piece 201, passes through the slots 222 and 214, and constitutes the aforesaid stop member. The cams 210 are carried by a lever 232 pivotally connected via a link 224 to an L-shaped lever 226 pivotally mounted on the piece 201. When the lever 226 is in the position of Fig. 2 the cams 210 force apart the collars 209 and hence the stops 208, so jamming the rollers 206 in the channel 205 and preventing relative movement of the pieces 201 and 202. To release the rollers 206 the lever 226 is raised to rotate the cams 210. The lever 226 is held against accidental release by the toggle action of its pivotal supports or by a spring (not shown). In a second embodiment the cams 210 are elliptical. The rollers 206 may be replaced by balls. |
