Abstract: A dustproof device is provided for use with a ball screw which includes a screw rod and a nut mounted around the screw rod. The dustproof device includes an annular body and an elastic valve plate. The annular body is disposed inside the nut and penetrated by the screw rod and has an outer annular surface provided with a debris exit. The debris exit has one end in communication with a spiral passage formed between the screw rod and the nut. The elastic valve plate, which is provided at the opposite end of the debris exit of the annular body, can be pushed open by a fluid and thus opens the debris exit, allowing the debris generated by the ball screw to be discharged through the debris exit along with the fluid, thereby contributing to extending the service life of the ball screw.

Abstract: A dustproof device is provided for use with a ball screw which includes a screw rod and a nut mounted around the screw rod. The dustproof device includes an annular body and an elastic valve plate. The annular body is disposed inside the nut and penetrated by the screw rod and has an outer annular surface provided with a debris exit. The debris exit has one end in communication with a spiral passage formed between the screw rod and the nut. The elastic valve plate, which is provided at the opposite end of the debris exit of the annular body, can be pushed open by a fluid and thus opens the debris exit, allowing the debris generated by the ball screw to be discharged through the debris exit along with the fluid, thereby contributing to extending the service life of the ball screw.

Abstract: A dustproof device is provided for use with a ball screw which includes a screw rod and a nut mounted around the screw rod. The dustproof device includes an annular body and an elastic valve plate. The annular body is provided at one end of the nut and penetrated by the screw rod and has an outer annular surface provided with a debris exit. The debris exit has one end in communication with a spiral passage formed between the screw rod and the nut. The elastic valve plate, which is provided at the opposite end of the debris exit of the annular body, can be pushed open by a fluid and thus opens the debris exit, allowing the debris generated by the ball screw to be discharged through the debris exit along with the fluid, thereby contributing to extending the service life of the ball screw.

Abstract: An assembly type cleaning structure for an induction reader comprises a positioning member with an assembling portion and restricting portions. With the assembling portion, the positioning member can be detachably assembled on the induction reader. And the restricting portions enable the positioning member to be forced onto the induction reader. The user can assemble the cleaning structure onto the induction reader or remove it by himself according to the environment.

Abstract: A mobile positioning structure for an axial rod motor comprises a base on which being disposed a stator, and on the stator is disposed a mover on which being mounted an optical signal reader. The stator is provided with a plurality of measurement marks. The position of the mover on the stator is read by the cooperation of an optical reader and measurement marks, such an optical signal reading method is not affected by the magnetic field. Hence, the data detected will be more accurate with less error.

Abstract: A cleaning structure for an induction reader is mounted on an induction reader and moves with respect to a ruler. The cleaning structure comprises: a removing portion with a predetermined angle or curve, the removing portion is provided with an assembling portion at one side thereof facing the induction reader, and on the other side of the removing portion is formed an abutting portion. By such arrangements, the angle or curved type clean structure can use the slope of the removing portion to contact and push the obstacles towards both sides of the ruler. The cleaning structure not only has a light structure weight but also the resistance against pushing the obstacles is reduced.

Abstract: An assembly type cleaning structure for an induction reader comprises a positioning member with an assembling portion and restricting portions. With the assembling portion, the positioning member can be detachably assembled on the induction reader. And the restricting portions enable the positioning member to be forced onto the induction reader.

Abstract: A magnetic sensing device with an elastic balance member comprises a magnetic ruler, a sensing head and an elastic balance member. The sensing head is parallelly moveable relative to the magnetic ruler, the elastic balance member is movably assembled on the sensing head by assembly portions, such that the elastic balance member provides a buffering effect to absorb the impact force, pulling force or pushing force during the displacement of the sensing head. In addition, the elastic balance member further formed with a turning portion with a predetermined curvature, which is connected to the assembly portion and can strengthen the structure of the elastic balance member to make the elastic balance member strong enough to resist pressure.