Abstract: The disclosure provides a limit device and a robot using the same. The limit device comprises a first connecting member, a transmission rod and a second connecting member. The first connecting member comprising a first main body portion and two first connecting elements. The two first connecting elements are arranged at intervals. The two first connecting elements are respectively connected to the first main body. The transmission rod comprising a first end and a second end. The first end and the second end are arranged at intervals. The first end penetrates through one of the two first connecting elements. The second end penetrates through the other one of the two first connecting element. The second connecting member provided with two indexing buckles. The two indexing buckles are arranged at intervals, each of the indexing buckles comprises a first limiting groove and a second limiting groove.

Abstract: A method and a system for managing cache files, adapted for a local end apparatus to manage files cached from a service end apparatus, are provided. In the method, a file is divided into a plurality of segments, and a part of the segments are downloaded from the service end apparatus and stored in the local end apparatus. Then, the segments of the file to be downloaded are increased or decreased according to a utility rate of the file.

Abstract: A multimedia playback apparatus and a multimedia file prefetching method are provided. In the method, a first multimedia file is downloaded and played first. Next, at least one playlist is read, and at least one second multimedia file sorted after the first multimedia file in the at least one playlist is searched. Then, the at least one second multimedia file is prefetched.

Abstract: A water-cooled heat sink includes a base, a box, a propelling module, a driving module, and a plurality of conduits. The box is disposed above the base, and receives a cooled liquid. The driving module includes a first magnet. The base defines a plurality of channels. The propelling module includes a cylinder, a piston, a second magnet, and a valve. The cylinder is disposed on an inner wall of the box. The piston is disposed in the cylinder, and defines a through hole in a middle portion thereof. The second magnet is fixed to the piston. The valve is fixed in the through hole. The conduits interconnect the cylinder and the box. The first magnet can repel or attract the second magnet, thereby sliding the piston toward the cylinder to close the valve or away from the cylinder to open the valve.

Abstract: An electronic device includes a first housing, a second housing, and a sealing member. The first housing has a first sidewall, and the second housing has a second sidewall. The sealing member is positioned between the first housing and the second housing. The first sealing member is elastic, and defines a first assembly groove and a second assembly groove. The first sidewall is engaged in the first assembly groove and tightly attached to the sealing member. The second sidewall is engaged in the second assembly groove and tightly attached to the sealing member.

Abstract: An electronic device includes a first housing, a second housing, and a buffering member. The first housing has a first flange, and the second housing has a second flange. The buffering member is positioned between the first housing and the second housing. The buffering member includes a first buffering portion and a second buffering portion. The first buffering portion is positioned between the first housing and the second housing and separates the first and second housings. The second buffering portion protrudes between the first flange and the second flange.

Abstract: A water-cooled heat sink includes a base, a box, a propelling module, a driving module, and a plurality of conduits. The box is disposed above the base, and receives a cooled liquid. The driving module includes a first magnet. The base defines a plurality of channels. The propelling module includes a cylinder, a piston, a second magnet, and a valve. The cylinder is disposed on an inner wall of the box. The piston is disposed in the cylinder, and defines a through hole in a middle portion thereof. The second magnet is fixed to the piston. The valve is fixed in the through hole. The conduits interconnect the cylinder and the box. The first magnet can repel or attract the second magnet, thereby sliding the piston toward the cylinder to close the valve or away from the cylinder to open the valve.

Abstract: An electronic device includes a first housing, a second housing, and a sealing member. The first housing has a first sidewall, and the second housing has a second sidewall. The sealing member is positioned between the first housing and the second housing. The first sealing member is elastic, and defines a first assembly groove and a second assembly groove. The first sidewall is engaged in the first assembly groove and tightly attached to the sealing member. The second sidewall is engaged in the second assembly groove and tightly attached to the sealing member.

Abstract: An electronic device includes a first housing, a second housing, and a buffering member. The first housing has a first flange, and the second housing has a second flange. The buffering member is positioned between the first housing and the second housing. The buffering member includes a first buffering portion and a second buffering portion. The first buffering portion is positioned between the first housing and the second housing and separates the first and second housings. The second buffering portion protrudes between the first flange and the second flange.