Abstract: A ball screw comprises a screw, a nut, two return assemblies and a rolling assembly. The two return assemblies are disposed in two ends of the nut, and each of the return assemblies is defined with a return passage provided with two guiding grooves at two sides thereof for guiding the linking portions of the rolling assembly. The guiding grooves twist an angle of about 90 degrees within the return portion of each of the return assemblies to prevent the linking portions from being stretched or extruded improperly to reduce the deformation to the lowest, thus effectively extending the service life of the rolling assembly.

Abstract: A crossed-roller bearing includes an inner ring having a first periphery and a first raceway groove formed on the first periphery, the first raceway groove being provided with a complete first raceway surface and a complete second raceway surface; an outer ring sleeved onto the inner ring and having a second periphery, an insertion hole, and a second raceway groove formed on the second periphery and corresponding to the first raceway groove, the second raceway groove being provided with a third raceway surface and a fourth raceway surface, a receiving space being jointly defined by the first, second, third, and fourth raceway surfaces; and a plug, the insertion hole running through one of the third and fourth raceway surfaces to form a breakage therearound; a plurality of rollers mounted in the receiving space to fill the breakage; a plug mounted in the insertion hole and fills the breakage.

Abstract: This invention is related to a rolling bearing, comprising a ring member, having a first rolling groove; two semi-ring members, each includes a first side and a second side, a slanted surface formed on said first side, and counter-bore and threaded holes disposed alternatively on said second side. Said first side of semi-ring member is in contact with said slanted surface thereof together form a second rolling groove. Said second rolling groove and said first rolling groove together form a rolling space. Said counter-bore holes on one semi-ring member being respectively connected to said threaded holes on another semi-ring member. Fasteners are arranged within said counter-bore and threaded holes to attach said semi-ring members. Therefore, the assembly of the bearing requires only two identical semi-ring members, and as the two semi-ring members are of an identical structure, the structure of the rolling bearing is symmetrical.

Abstract: An exemplary hearing aid compatibility (HAC) module includes an insulative substrate and a ground member. The substrate includes a first mounting surface, and a second mounting surface at opposite sides thereof, and a third mounting surface between the first mounting surface and the second mounting surface. The ground member includes two ground portions respectively attached to the first mounting surface and the second mounting surface, and a connecting portion attached to the third mounting surface. The connecting portion comprises two or more parts. One of the parts connects one of the ground portions, and another of the parts connects the other ground portion.

Abstract: A linear motion transmission apparatus with a chain comprises at least one flexible link and a plurality of spacers, the spacers are equidistantly spaced apart and connected by the link, each two neighboring spacers define a holding space for holding rolling elements, each of the spacers has two separated arcuate retaining portions used to contact and hold the rolling elements. A lubricating-oil passage is formed between each of the spacers and the rolling elements to guide the lubricating oil from the non-load area of the outer surface of the rolling element to the load area, allowing the load area to be lubricated sufficiently.

Abstract: A multiband antenna used for a portable communication device includes a first antenna unit, a second antenna unit, a third antenna unit, and feed member. The first antenna unit, the second antenna unit and the third antenna unit are capable of receiving and/or sending wireless signals. The second antenna unit is connected to the first antenna unit, the third antenna unit is connected to the first antenna unit, and the feed member is electrically connected to the first antenna unit and the second antenna unit. The feed member receives wireless signals and transmits the wireless signals through the first antenna, the second antenna unit and the third antenna unit to generate corresponding current paths, and the first antenna unit is located between the second antenna unit and the third antenna unit to isolate the second antenna unit and the third antenna unit to avoid coupling interference of their resonant frequencies.

Abstract: A crossed-roller bearing includes an inner ring having a first periphery and a first raceway groove formed on the first periphery, the first raceway groove being provided with a complete first raceway surface and a complete second raceway surface; an outer ring sleeved onto the inner ring and having a second periphery, an insertion hole, and a second raceway groove formed on the second periphery and corresponding to the first raceway groove, the second raceway groove being provided with a third raceway surface and a fourth raceway surface, a receiving space being jointly defined by the first, second, third, and fourth raceway surfaces; and a gasket, the insertion hole running through one of the third and fourth raceway surface to form a breakage therearound; a plurality of rollers mounted in the receiving space to fill the breakge; a gasket mounted in the insertion hole and fills the breakage.

Abstract: An exemplary hearing aid compatibility (HAC) module includes an insulative substrate and a ground member. The substrate includes a first mounting surface, and a second mounting surface at opposite sides thereof, and a third mounting surface between the first mounting surface and the second mounting surface. The ground member includes two ground portions respectively attached to the first mounting surface and the second mounting surface, and a connecting portion attached to the third mounting surface. The connecting portion comprises two or more parts. One of the parts connects one of the ground portions, and another of the parts connects the other ground portion.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage between the nut member and the screw and for receiving a number of ball bearing members, a ball return pipe includes a U-shaped structure having a central tubular member and two ends for engaging into two orifices of the nut member, and the nut member includes a straight fence formed between the orifice and the screw hole of the nut member for guiding the ball bearing members to move through a ball return pathway of the ball return pipe and the endless ball guiding passage of the nut member and for preventing the teeth of the nut member from being broken by the ball bearing members.

Abstract: A multi-cycle ball screw comprises a screw, a nut, a plurality of balls and circulating caps. The screw is provided with at least two screw helical grooves in an outer surface thereof. The nut is provided with nut helical grooves opposite to the screw helical grooves. The balls are disposed between the helical grooves of the screw and the nut. Each circulating cap is provided with a circulating groove having an opening at both ends thereof and a guiding portion between the two openings. The circulating caps are connected to two points of one screw helical groove by two openings thereof while the guiding portion thereof crosses over the other screw helical groove. By repeating this cooperation method, a multi-cycle ball screw can be formed.

Abstract: Disclosed is a ball screw module including a screw shaft, a nut member, a ball connector, and a circulating device mounted on the nut member. A helical rolling track is formed between the screw shaft and the nut member. The circulating device is in communication with the helical rolling track and has a circulating route. The circulating route includes an intermediate route, two connecting routes connecting the intermediate route, and two guiding sidewalls formed at sides of the circulating route. The guiding sidewalls guide the ball connector to twist in a clockwise direction while the ball connector entering and leaving the intermediate route and guide the ball connector to twist in a counterclockwise direction while the ball connector passing the intermediate route.

Abstract: A linear motion transmission apparatus with a chain comprises at least one flexible link and a plurality of spacers, the spacers are equidistantly spaced apart and connected by the link, each two neighboring spacers define a holding space for holding rolling elements, each of the spacers has two separated arcuate retaining portions used to contact and hold the rolling elements. A lubricating-oil passage is formed between each of the spacers and the rolling elements to guide the lubricating oil from the non-load area of the outer surface of the rolling element to the load area, allowing the load area to be lubricated sufficiently.

Abstract: A ball screw comprises a screw, a nut, two return assemblies and a rolling assembly. The two return assemblies are disposed in two ends of the nut, and each of the return assemblies is defined with a return passage provided with two guiding grooves at two sides thereof for guiding the linking portions of the rolling assembly. The guiding grooves twist an angle of about 90 degrees within the return portion of each of the return assemblies to prevent the linking portions from being stretched or extruded improperly to reduce the deformation to the lowest, thus effectively extending the service life of the rolling assembly.

Abstract: A multiband antenna used for a portable communication device includes a first antenna unit, a second antenna unit, a third antenna unit, and feed member. The first antenna unit, the second antenna unit and the third antenna unit are capable of receiving and/or sending wireless signals. The second antenna unit is connected to the first antenna unit, the third antenna unit is connected to the first antenna unit, and the feed member is electrically connected to the first antenna unit and the second antenna unit. The feed member receives wireless signals and transmits the wireless signals through the first antenna, the second antenna unit and the third antenna unit to generate corresponding current paths, and the first antenna unit is located between the second antenna unit and the third antenna unit to isolate the second antenna unit and the third antenna unit to avoid coupling interference of their resonant frequencies.

Abstract: A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, a tubular member is engaged with the ball nut and includes a ball circulating pathway communicative with the helical groove of the ball nut, and includes an intermediate segment, two curved segments, and two end coupling segments each having a ball guiding channel which includes a wider inner section for guiding and circulating the flexible coupling member of a ball coupler to smoothly move through the ball guiding channel of each end coupling segment and for preventing the flexible coupling member from being twisted. The tubular member is preferably formed by two half members.

Abstract: A ball connect device for a linear guideway comprises: at least one ribbon-shaped connecting portion in which being formed a plurality of retaining holes for retaining a plurality of balls, and a plurality ring portions being protruded out a surface of the connecting portion and each of the ring portions being formed around the respective retaining holes to circle around the balls. The retaining holes each has two open ends that are located at both sides of the ribbon-shaped connecting portion, a diameter of one of the two open ends is near a diameter of the balls for easy installation of the balls into the ball connect device, and a diameter of another one of the two open ends is smaller than the diameter of the balls so as to prevent disengagement of the balls.

Abstract: A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, a tubular member is engaged with the ball nut and includes a ball circulating pathway communicative with the helical groove of the ball nut, and includes an intermediate segment, two curved segments, and two end coupling segments each having a ball guiding channel which includes a wider inner section for guiding and circulating the flexible coupling member of a ball coupler to smoothly move through the ball guiding channel of each end coupling segment and for preventing the flexible coupling member from being twisted. The tubular member is preferably formed by two half members.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage between the nut member and the screw and for receiving a number of ball bearing members, a ball return pipe includes a U-shaped structure having a central tubular member and two ends for engaging into two orifices of the nut member, and the nut member includes a straight fence formed between the orifice and the screw hole of the nut member for guiding the ball bearing members to move through a ball return pathway of the ball return pipe and the endless ball guiding passage of the nut member and for preventing the teeth of the nut member from being broken by the ball bearing members.

Abstract: An antenna module includes an antenna set, a feeding point and a ground plane. The antenna set includes a first antenna, and a second antenna. The first antenna has a first resonant frequency and the second antenna a second resonant frequency.

Abstract: Disclosed is a ball screw module including a screw shaft, a nut member, a ball connector, and a circulating device mounted on the nut member. The screw shaft and the nut member constitute a first load rolling track rolling in a first spiral direction. The circulating device is connected with the first load rolling groove and has a circulating route. The circulating route includes an intermediate route, connecting routes at the two ends of the intermediate route, and at least a guiding groove. The guiding groove guides the ball connector rotating in a second spiral direction along the connecting routes, wherein the second spiral direction is opposite to the first spiral direction. The guiding groove guides the ball connector rotating in a third spiral direction along the intermediate route, wherein the third spiral direction is the same as the first spiral direction.