467results about How to "Guaranteed contact area" patented technology

The invention aims to provide a vacuum cover for a storage container, wherein the vacuum cover for the storage container is simple in structure and capable of conducting immediate vacuumizing or immediate pressure relief on a wide-mouth storage container. The vacuum cover for the storage container comprises a cover body. The portion, close to the edge, on the lower side of the cover body is provided with a groove matched with a mouth of the storage container in a surrounding manner. A first seal ring is arranged in the groove. The cover body is further provided with a cavity. The cavity is provided with a vacuumizing pressing block in a matched manner through a first reset spring. The vacuumizing pressing block and the cavity cooperate and form a vacuumizing chamber. The bottom of the cavity is provided with a vacuumizing opening communicating with an inner cavity of the storage container. The vacuumizing opening is provided with a one-way valve in a matched manner. The vacuumizing pressing block is pressed circularly, and then the inner cavity of the storage container is vacuumized. The cover body is further provided with a pressure relief device. The outer end of the pressure relief device is exposed out of the cover body. The pressure relief device is pressed, and then the pressure in the storage container recovers to the normal pressure. The vacuum cover for the storage container is applied to the field of vacuum devices.

The invention discloses a linkage electric connection assembly. The linkage electric connection assembly comprises a linkage mechanism and two electric connection devices. The electric connection device is connected between a body of the electric appliance device with adraw-out structure and adraw-out device, and comprises a draw-out device connection assembly, a body connection assembly and a flexible assembly. The draw-out device connection assembly is fixed on the draw-out device and is electrically connected with the wire inlet and outlet ends of the draw-out device. The body connection assembly comprises a contact piece with a clamping mechanism, and the clamping mechanism enables the contact piece to be tightly attached to and clamp abody busbar. The flexible assembly connects the draw-out device connection assembly and the body connection assembly to form a conductive path. The contact pieces of the body connecting assembly adapt to the position deviation of the body busbar to generate deviation, so the contact pieces are tightly attached to and clamp the body busbar, and the flexible assembly absorbs the deviation of the contact pieces through self deformation, so the deviation is not transmitted to the draw-out device connection assembly. The linkage mechanism is connected with the clamping mechanisms of the two electric connecting devices, and the linkage mechanism isinsulated and enables the clamping mechanisms of the two electric connecting devices to act synchronously.

A charging roll is provided which does not cause image defects even when being used for a long period of time and does not allow a surface layer to be separated when an electrophotographic machine is operated after the charging roll installed therein is left under high temperature and humidity conditions. A charging roll includes a shaft, an electrically conductive rubber foam layer formed on an outer circumferential surface of the shaft, and a surface layer formed radially outwardly of the electrically conductive rubber foam layer. The electrically conductive rubber foam layer includes a skin layer having an opening area ratio of from 0.5 to 20% at a superficial layer of the electrically conductive rubber foam layer, and the surface layer is formed of a synthetic resin composition mainly composed of a synthetic resin material having a glass transition temperature of from 0 to 45 DEG C.

The invention relates to a vehicle transmission shaft straightening device, which comprises a base, guide rails, a sliding support mechanism, a measurement mechanism, a stand column mechanism and a straightening mechanism, wherein the guide rails are arranged on the base, the sliding support mechanism is connected with the guide rails in a sliding mode, the measurement mechanism is arranged on the sliding support mechanism, the stand column mechanism is arranged on the base, and is arranged on one side of the guide rails, the straightening mechanism is arranged on the stand column mechanism, a transmission shaft is arranged on the sliding support mechanism, the straightening mechanism downwardly moves to a position where is be about to contact with the upper surface of the transmission shaft, the measurement mechanism is contacted with the lower surface of the transmission shaft, and rotates the transmission shaft and pushes the sliding support mechanism, and the straightening mechanism straightens pressure of the transmission shaft through reading of the measurement mechanism. Compared with the prior art, the vehicle transmission shaft straightening device has the advantages that the vehicle transmission shaft straightening device improves straightening precision, and is simple in structure and convenient to operate and the like.

Provided is a laminated iron core (10) that will improve the yield of materials, and prevent cracks or ruptures from being produced on iron core pieces, by easing the stress to be generated on coupling sections (13). Coupled divided-iron-core-pieces (14) to be used in assembling the laminated iron core (10) has, on the inner side in the radius direction of the coupling sections (13), V-shaped slots (17) with an opening angle of 360 / n, assuming the number of divided-iron-core-pieces (19) to be n, and which open towards the inner side in the radius direction; and also has, on the outer side in the radius direction of the coupling sections (13), separating sections (18) that separate mutually-adjacent, divided yoke-piece sections (12), which are located more on the outer side in the radius direction than the coupling sections (13). Furthermore, first through holes (20) having circular-arcs are formed on the end sections at the outer side in the radius direction of the V-shaped slots (17), which are in contact with the coupling sections (13); and second through holes (20), having arcs with a radius of curvature greater than the circular-arcs of the first through holes (20), are formed on the end sections at the inner side in the radius direction of the separating sections (18), which are in contact with the coupling sections (13).