56results about How to "Avoid irreversible deformation" patented technology

Microelectromechanical system (MEMS) comprising:an active part (5) comprising an electromechanical device (28),at least one base (6) for fastening said microsystem on a support (8),at least one fastener (21, 21′) fastening said active part (5) to said at least one base (6) and allowing a displacement of said active part (5) relatively to said at least one base (6) along an axis (Z) more or less perpendicular to the plane of said support (8) when said microsystem is fastened onto said support (8), bumper elements (27, 27′, 37′) for limiting the amplitude of the displacements of said active part (5) relatively to said at least one base (6) along said perpendicular axis (Z).The active part (5) being capable of moving relatively to the base (6) to which it is fastened, it is isolated from any mechanical constraint that could be sustained by the base (6), in particular torsion or flexion due to it being fastened onto a support (8). On the other hand, since the movements of the active part (5) are limited by the bumper elements (27, 37, 27′, 37′), it can be guaranteed thanks to the invention that the fastener or fasteners (21, 21′) will not be stretched beyond their elasticity range, thus avoiding their irreversible deformation and / or their rupture.

The invention provides a block-to-stop transmission device; the block-to-stop transmission device comprises a drive chain wheel and a transmission chain wheel; the drive chain wheel and the transmission chain wheel are concurrently circled by an enclosed chain, so as to enable the drive chain wheel and the transmission chain wheel to be driven by the chain; a control device of the drive chain wheel is arranged in a never changed position with respect to the rotation axis of the drive chain wheel; a switch of the control device always directly or indirectly pushes against the chain via an elastic device, thus the position of the switch with respect to the control device can be changed when the chain is not wrapped on the drive chain wheel, or the portion of chain on the transmission chain wheel is loosened or tightened, thereby changing the work state of the switch. The control device of the block-to-stop transmission device is matched with the chain by using the elastic device and a micro switch, so as to conveniently and effectively identify whether the output end of the transmission mechanism is blocked, and timely control the drive chain wheel to stop the power output by controlling the triggering of the switch, thereby achieving the block-to-stop function; additionally, a certain motion process exists when the chain changes from the tightened position to the loosened limit position, thus the whole mechanism has a margin for sufficient buffering, so as to effectively prevent the mechanical parts from irreversible deformation caused by emergent forward braking of the mechanical parts.

A weighing pan carrier (47) for a balance with a weighing pan and with a weighing cell that includes a load-receiving portion (11) and a stationary portion (12) has an overload protection device against excessive vertically directed forces that is releasably engaged with the weighing pan carrier. The weighing pan carrier (47) is fastened to the load-receiving portion (11) of the weighing cell and has on the other hand a fixed connection to the weighing pan. The weighing pan carrier (47) has a torque safety feature, which is integrated in the overload protection device and provides protection against excessive forces acting tangentially on the weighing pan and / or on the weighing pan carrier (47) in a direction perpendicular to the direction of the weighing load.

The invention belongs to the technical field of film processing, and in particular relates to a wrinkle-removing device for plastic film, which includes a first mechanism, a second mechanism and a third mechanism which are sequentially fixed on a first fixed base along the movement direction of the plastic film; The high-frequency reciprocating extrusion and separation of the fourth roller and the fifth roller in the invention makes the wrinkles on the part of the plastic film between the fifth roller and the second roller effectively removed, while the fourth roller and the fifth roller After the roller is squeezed, the plastic film is separated instantly to relax the further tightened plastic film, avoiding the irreversible deformation of the plastic film caused by the long-term tension of the plastic film, and ensuring that the plastic film coming out of the wrinkle removal device is a qualified product. Minimize the defect rate of plastic film products, reduce the production cost of plastic film, and improve production efficiency.