Abstract: Disclosed is manual screw shaft driving device, comprising: a screw shaft, a driving member, a gripping member and a driving direction switching member, wherein the driving member is fitted around the screw shaft in a screw fit manner, the screw shaft is provided passing through a sliding and rotating space inside the gripping member, and the driving member is disposed in the sliding and rotating space, wherein while the driving direction switching member is switched to a first switching position, the screw shaft is driven to rotate only in a first rotation direction by a manual forward and backward sliding operation of the gripping member, and while the driving direction switching member is switched to a second switching position, the screw shaft is driven to rotate only in a second rotation direction by the manual forward and backward sliding operation of the gripping member.

Abstract: Disclosed is a drive device for a vertical window blind, comprising: a driving connecting rod, a driving screw rod and an open-and-close transmission rod connected with a slat open-and-close control screw of the vertical window blind, wherein the driving connecting rod drives the slat open-and-close control screw to axially rotate in the horizontal direction by the rotational driving force via the driving screw rod and the open-and-close transmission rod, thereby moving a plurality of slats slidably disposed on the slat open-and-close control screw in the horizontal direction.

Abstract: Disclosed is a window blind chain reel device comprising: a housing, a rotating wheel and a driving shaft, wherein the rotating wheel has a circumferential guide groove with a chain winding space being formed between the circumferential guide groove and the housing, and the rotating wheel is formed with a plurality of engaging concaves corresponding to beads of the window blind chain, wherein the window blind chain is arranged to extend into the housing, extend around the rotating wheel along the chain winding space and then extend outward, and thus when the rotating wheel is rotated by the driving shaft, the chain body of the window blind chain is driven, by the engagement between the beads of the window blind chain and the engaging concaves, to move in a manner that one end thereof is retracted inward and the other end thereof is extended outward.

Abstract: The present invention provides a myopia-preventing high intensity illumination apparatus for illuminating eyeballs and surrounding tissues via light that penetrating periorbital skin, subcutaneous tissue, then pass through cornea, iris, uvea, sclera and choroid, comprising a light source and a controller electrically connects to the light source, wherein the light source is projects to and illuminates on skin surrounding eyes, penetrates and enters subcutaneous tissue, iris, ciliary body and lens, as well as penetrates peripheral tissues of eyeballs, sclera, uvea, choroid and retinal pigment epithelium, and indirectly enters into vitreous and retina, so as to prevent myopia from further worsening by inducing microscopic biochemical reactions.

Abstract: The present invention provides a myopia-preventing illumination apparatus for illuminating eyeballs and surrounding tissues via light that penetrating periorbital skin, subcutaneous tissue, then pass through cornea, iris, uvea, sclera and choroid, comprising a light source and a controller electrically connects to the light source, wherein the light source is projects to and illuminates on skin surrounding eyes, penetrates and enters subcutaneous tissue, iris, ciliary body and lens, as well as penetrates peripheral tissues of eyeballs, sclera, uvea, choroid and retinal pigment epithelium, and indirectly enters into vitreous and retina, so as to prevent myopia from further worsening by inducing microscopic biochemical reactions.

Abstract: A bead chain safety system for roller blinds is revealed. The system includes a fixing base, an assembly base, a rotary disc, a first transmission member, and an elastic member. When a child entangled pulls a bead chain, the first transmission member is retracted into a cavity of the rotary disc and both the rotary disc and the bead chain are released from a rotary-disc mounting space between the fixing base and the assembly base. In order to put the rotary disc and other parts back, first the elastic member and the first transmission member are mounted into the cavity in turn. Then the rotary disc and the bead chain are set into the rotary-disc mounting space. The first transmission member pushed back by the elastic member is locked with and positioned by a second transmission member. Thus the bead chain and other parts are mounted again easily.

Abstract: A bead chain safety system for roller blinds is revealed. The system includes a fixing base, an assembly base, a rotary disc, a first transmission member, and an elastic member. When a child entangled pulls a bead chain, the first transmission member is retracted into a cavity of the rotary disc and both the rotary disc and the bead chain are released from a rotary-disc mounting space between the fixing base and the assembly base. In order to put the rotary disc and other parts back, first the elastic member and the first transmission member are mounted into the cavity in turn. Then the rotary disc and the bead chain are set into the rotary-disc mounting space. The first transmission member pushed back by the elastic member is locked with and positioned by a second transmission member. Thus the bead chain and other parts are mounted again easily.

Abstract: A load carrier for a vehicle comprising a vehicle roof supports adapted to carry a load thereon in a consistent vertical orientation; a lifting apparatus for lifting the load from a lower position in the consistent vertical orientation to a raised position at or above the vehicle roof supports; wherein the load is able to be lifted in the consistent vertical orientation and supported in the same consistent vertical orientation.

Abstract: A bone fixation guide device is adapted for fixing a bone plate on a bone, wherein the bone plate has at least two screw holes. The bone fixation guide device includes: a handheld holder having a through hole; a first guide sleeve having a guide hole, adapted for passing through the through hole of the handheld holder, and fixed to the bone plate; and a guide plate having a fixing portion and at least two openings, the fixing portion adapted for being assembled on the first guide sleeve, whereby the guide plate is disposed on the handheld holder, wherein the screw holes of the bone plate correspond to the openings of the guide plate.