Abstract: An electronic device includes a housing, a support member coupled to the housing, a trigger member coupled to the support member, a sliding member, a first magnet member coupled to the sliding member, and a second magnet member coupled to the support member. The first magnet member includes two first magnets and a second magnet coupled to the corresponding first magnet. The magnetic pole of the first magnets is opposite to the magnetic pole of the second magnet. The second magnet member includes a third magnet and two fourth magnets. The magnetic pole of the third magnet is same as the magnetic pole of the second magnet. The magnetic pole of the fourth magnets is same as the magnetic pole of the first magnets.

Abstract: An enclosed polishing apparatus include a housing, a fixing seat, a guiding mechanism, and a chain-driven polishing mechanism. The housing includes a bottom housing and a top housing connected to the bottom housing. The fixing seat is securely placed in the bottom housing. The guiding mechanism is placed in the top housing above the fixing seat. The polishing mechanism is movably mounted on the guiding mechanism above the fixing seat. The polishing mechanism is driven and guided by the guiding mechanism to follow a desired polishing contour on a workpiece.

Abstract: An electronic device includes a housing, a support member coupled to the housing, a trigger member coupled to the support member, a sliding member, a first magnet member coupled to the sliding member, and a second magnet member coupled to the support member. The first magnet member includes two first magnets and a second magnet coupled to the corresponding first magnet. The magnetic pole of the first magnets is opposite to the magnetic pole of the second magnet. The second magnet member includes a third magnet and two fourth magnets. The magnetic pole of the third magnet is same as the magnetic pole of the second magnet. The magnetic pole of the fourth magnets is same as the magnetic pole of the first magnets.

Abstract: A separating apparatus for separating stacked magnetically conductible workpieces, includes a support assembly and a magnet assembly positioned adjacent to the support assembly. The support assembly includes a support member and a support rod fixedly coupled with the support member, the support is used for supporting the tacked magnetically conductible workpieces. The magnet assembly includes a holding member and at least one magnet member received in the holding member. The inner magnetic field of the at least one magnet member has a direction parallel to an extending direction of the support member. The at least one holding member is spaced from the support rod by a predetermined distance thereby separating the stacked magnetically conductible workpieces apart along the support rod via the inner magnetic field of the at least one magnet member.