Abstract: An onshore hydroelectric power generation device is disposed above a flow to obtain and convert the energy of flow into electricity, comprising a body unit, a water wheel unit, a mobile energy transmitting unit, and an electricity power generating unit. The kinetic energy of the flow is obtained by the water wheel unit, and is transmitted to the power generation unit adapted to the height of water level by the mobile energy transmitting unit.

Abstract: An eye protection device a first covering sheet, a protection sheet, and a second covering sheet. The first covering sheet has a first supporting edge with a containment slot and a first opening disposed on the first supporting edge. The protection sheet is disposed in the containment slot and has a non-transparent sheet and an axial aperture provided in the sheet. The second covering sheet has a second supporting edge and a second opening provided on the second supporting edge. The second supporting edge overlaps the first supporting edge, and the first and second supporting edges sandwich the protection sheet in the containment slot.

Abstract: An onshore hydroelectric power generation device is disposed above a flow to obtain and convert the energy of flow into electricity, comprising a body unit, a water wheel unit, a mobile energy transmitting unit, and an electricity power generating unit. The kinetic energy of the flow is obtained by the water wheel unit, and is transmitted to the power generation unit adapted to the height of water level by the mobile energy transmitting unit.

Abstract: An eye protection device a first covering sheet, a protection sheet, and a second covering sheet. The first covering sheet has a first supporting edge with a containment slot and a first opening disposed on the first supporting edge. The protection sheet is disposed in the containment slot and has a non-transparent sheet and an axial aperture provided in the sheet. The second covering sheet has a second supporting edge and a second opening provided on the second supporting edge. The second supporting edge overlaps the first supporting edge, and the first and second supporting edges sandwich the protection sheet in the containment slot.

Abstract: An electromagnetic wave isolation device includes an isolation layer, a first substrate layer and a second substrate layer. The isolation layer has a first surface and a second surface. The isolation layer is doped with metallic particles. The first substrate layer is adhered to the first surface of the isolation layer, and the second substrate layer is adhered to the second surface of the isolation layer. The metallic particles doped in the isolation layer form a protection net for blocking electromagnetic waves. The device of the present invention can be formed as pieces of various shapes. Thus, the production cost of the present invention is reduced, while the practicability thereof is increased.

Abstract: A retractable ladder includes telescoping rail sections each having left and right side rail members. Each side rail member has two aligned locking holes. A control device includes a shaft disposed rotatably between the side rail members of one of the rail sections, and two locking units each having a controlled piece fixed to and rotatable along with the shaft, two abutment plates, two locking pins, and two spring members biasing the abutment plates to abut respectively against two opposite sides of the controlled piece. The controlled piece is rotatable between a pushing position to push the locking pins to project outwardly from the locking holes in said one of the rail sections and engage respectively the locking holes in the adjacent rail section, and a non-pushing position, where the locking pins are permitted to extend inwardly so as to disengage from the locking holes in the adjacent rail section.

Abstract: A retractable ladder includes telescoping rail sections each having left and right side rail members. Each side rail member has two aligned locking holes. A control device includes a shaft disposed rotatably between the side rail members of one of the rail sections, and two locking units each having a controlled piece fixed to and rotatable along with the shaft, two abutment plates, two locking pins, and two spring members biasing the abutment plates to abut respectively against two opposite sides of the controlled piece. The controlled piece is rotatable between a pushing position to push the locking pins to project outwardly from the locking holes in said one of the rail sections and engage respectively the locking holes in the adjacent rail section, and a non-pushing position, where the locking pins are permitted to extend inwardly so as to disengage from the locking holes in the adjacent rail section.

Abstract: A cooling pack device is adapted to be applied to an object, and includes a cooling pack unit and a fastening unit. The cooling pack unit includes first and second cooling packs, each of which has a periphery that has an outer peripheral section formed with at least one fastening ring portion, and a connecting peripheral section interconnecting two ends of the outer peripheral section. The cooling pack unit further includes a pack connecting component that interconnects foldably the connecting peripheral sections of the first and second cooling packs. The fastening unit includes at least one fastening member operable for extending through the fastening ring portions of the outer peripheral sections of the first and second cooling packs so as to fasten the cooling pack unit on the object.