The present invention provides a curvature-adjustable backboard assembly and a curved display device. The curvature-adjustable backboard assembly of the present invention includes a curvable backboard, a slider-crank mechanism, and a first low-speed position-limiting electric machine. The slider-crank mechanism comprises a central pivot and a first rail that are fixed to the backboard, a first slider mounted to the first rail, a first crank that is rotatable about the central pivot as being driven by the first low-speed position-limiting electric machine, and a first connection rod having two ends respectively and pivotally coupled to the first slider and the first crank, wherein when the first crank is driven to rotate, the first connection rod drives the first slider to move along the first rail and during the movement of the first slider along the first rail, a height of an arched form of the backboard with respect to the central pivot at a location where the first slider passes may vary accordingly so as to allow for easy and efficient variation of a curvature of the backboard according to a desired curving condition.

An air compressor contains: a torque gear on which a central orifice and a connection rod are arranged. The central orifice has screw threads defined thereon and corresponds to one of multiple positioning orifices of a base, the one positioning orifice is configured to accommodate a bearing, and a screw bolt is inserted through the bearing in the base so as to screw with the central orifice via the torque gear. The connection rod of the torque gear is rotatably connected with a piston so that the piston moves in a cylinder to produce compressed air, the torque gear matingly contacts with the bearing along the screw bolt, and the bearing is not broken in the one positioning orifice, thus moving the piston in the cylinder reciprocately.

An air compressor contains: a torque gear on which a central orifice and a connection rod are arranged. The central orifice has screw threads defined thereon and corresponds to one of multiple positioning orifices of a base, the one positioning orifice is configured to accommodate a bearing, and a screw bolt is inserted through the bearing in the base so as to screw with the central orifice via the torque gear. The connection rod of the torque gear is rotatably connected with a piston so that the piston moves in a cylinder to produce compressed air, the torque gear matingly contacts with the bearing along the screw bolt, and the bearing is not broken in the one positioning orifice, thus moving the piston in the cylinder reciprocately.

The invention relates to a quick-change device (IO) having at least one locking bolt (26) and a motor drive which moves the locking bolt (26) into a locking position and an unlocking position, wherein the drive (16) has an energy connection (28a, 28b) and output means (34) interacting with the locking bolt (26), wherein the drive (16) comprises a rotary drive (30) having a motor and an output shaft (34), wherein the output shaft (34) is mechanically connected to the locking bolt (26), with the result that the locking bolt (26) is movable along an actuation axis. The invention is distinguished by the fact that the drive (16) has an attachment (20) for a shaft-hub connection, on which attachment a tool for manual actuation can be mounted, with the result that a manual actuation acts directly on the output shaft (34) and here the attachment (20) is arranged coaxially to a rotary connection (32a, 32b) of a gear shaft (32c, 32d).

The invention relates to a quick-change device (IO) having at least one locking bolt (26) and a motor drive which moves the locking bolt (26) into a locking position and an unlocking position, wherein the drive (16) has an energy connection (28a, 28b) and output means (34) interacting with the locking bolt (26), wherein the drive (16) comprises a rotary drive (30) having a motor and an output shaft (34), wherein the output shaft (34) is mechanically connected to the locking bolt (26), with the result that the locking bolt (26) is movable along an actuation axis. The invention is distinguished by the fact that the drive (16) has an attachment (20) for a shaft-hub connection, on which attachment a tool for manual actuation can be mounted, with the result that a manual actuation acts directly on the output shaft (34) and here the attachment (20) is arranged coaxially to a rotary connection (32a, 32b) of a gear shaft (32c, 32d).

A transmission mechanism of an air compressor contains: a piston, a torque gear, a connection rod rotatably connected with the piston, a cylinder configured to accommodate the piston, wherein a central orifice of the torque gear corresponds to an internal ring of a bearing in a second positioning orifice of a base, and a screw bolt is inserted through the torque gear to screw with the central orifice from the internal ring of the bearing, such that the torque gear matingly contacts with the bearing along the screw bolt, and the bearing is not broken, thus moving the piston in the cylinder stably.

A transmission mechanism of an air compressor contains: a piston, a torque gear, a connection rod rotatably connected with the piston, a cylinder configured to accommodate the piston, wherein a central orifice of the torque gear corresponds to an internal ring of a bearing in a second positioning orifice of a base, and a screw bolt is inserted through the torque gear to screw with the central orifice from the internal ring of the bearing, such that the torque gear matingly contacts with the bearing along the screw bolt, and the bearing is not broken, thus moving the piston in the cylinder stably.

The present invention provides a curvature-adjustable backboard assembly and a curved display device. The curvature-adjustable backboard assembly of the present invention includes a curvable backboard, a slider-crank mechanism, and a first low-speed position-limiting electric machine. The slider-crank mechanism comprises a central pivot and a first rail that are fixed to the backboard, a first slider mounted to the first rail, a first crank that is rotatable about the central pivot as being driven by the first low-speed position-limiting electric machine, and a first connection rod having two ends respectively and pivotally coupled to the first slider and the first crank, wherein when the first crank is driven to rotate, the first connection rod drives the first slider to move along the first rail and during the movement of the first slider along the first rail, a height of an arched form of the backboard with respect to the central pivot at a location where the first slider passes may vary accordingly so as to allow for easy and efficient variation of a curvature of the backboard according to a desired curving condition.

The present invention provides a curvature-adjustable backboard assembly and a curved display device. The curvature-adjustable backboard assembly of the present invention includes a curvable backboard, a slider-crank mechanism, and a first low-speed position-limiting electric machine. The slider-crank mechanism comprises a central pivot and a first rail that are fixed to the backboard, a first slider mounted to the first rail, a first crank that is rotatable about the central pivot as being driven by the first low-speed position-limiting electric machine, and a first connection rod having two ends respectively and pivotally coupled to the first slider and the first crank, wherein when the first crank is driven to rotate, the first connection rod drives the first slider to move along the first rail and during the movement of the first slider along the first rail, a height of an arched form of the backboard with respect to the central pivot at a location where the first slider passes may vary accordingly so as to allow for easy and efficient variation of a curvature of the backboard according to a desired curving condition.

A transmission mechanism of an air compressor contains: a piston, a torque gear, a connection rod rotatably connected with the piston, a cylinder configured to accommodate the piston, wherein a central orifice of the torque gear corresponds to an internal ring of a bearing in a second positioning orifice of a base, and a screw bolt is inserted through the torque gear to screw with the central orifice from the internal ring of the bearing, such that the torque gear matingly contacts with the bearing along the screw bolt, and the bearing is not broken, thus moving the piston in the cylinder stably.