Abstract: A linear motion guide device having a long-life slider is provided. The linear motion guide device includes a guide rail, a plurality of rolling elements, and a slider. The material of the slider body 11 is alloy steel containing 0.1 mass % or more and less than 0.3 mass % of C, 0.5 mass % or more and 1.5 mass % or less of Cr, and 0.1 mass % or more and 0.4 mass % or less of Si, with the balance being Fe and inevitable impurities. An amount of retained austenite in a surface layer 14F of a slider-side rolling groove 14 subjected to a carburizing heat treatment is 15 vol % or more and 45 vol % or less. The surface hardness of the slider-side rolling groove 14 is Hv 650 or more.

Abstract: An ultraviolet ray emitting package includes: a substrate having an upper portion defining a recess; an ultraviolet ray emitting element provided within the recess of the substrate; an ultraviolet ray transmitting window member provided on the upper portion of the substrate to cover the recess of the substrate; a resin adhesive layer provided between the upper portion of the substrate and the ultraviolet ray transmitting window member; and an optical shielding layer provided between the resin adhesive layer and the ultraviolet ray transmitting window member.

Abstract: An ultraviolet ray emitting package includes: a substrate having an upper portion defining a recess; an ultraviolet ray emitting element provided within the recess of the substrate; an ultraviolet ray transmitting window member provided on the upper portion of the substrate to cover the recess of the substrate; a resin adhesive layer provided between the upper portion of the substrate and the ultraviolet ray transmitting window member; and an optical shielding layer provided between the resin adhesive layer and the ultraviolet ray transmitting window member.

Abstract: A method for manufacturing a semiconductor light emitting apparatus of side emission type includes disposing a light emitting device on a substrate having a predetermined electrode pattern. A side member is disposed on the substrate to be spaced apart from the light emitting device with a predetermined space. The light emitting device and the electrode pattern are electrically connected. A light reflecting member is disposed in the space between the side member and at least one side surface of the light emitting device so that the light reflecting member is in contact with the at least one side surface of the light emitting device. A light-transmitting sealing member is disposed to surround the light emitting device other than the at least one side surface that is in contact with the light reflecting member. A light-reflective ceiling member is disposed at least over the sealing member.

Abstract: A ball return channel of a ball screw is formed within a nut and a ring-shaped non-contact seal is arranged at the axial both ends of the nut. A suction hole radially penetrating the nut is formed within the range of a raceway (a rolling channel formed by a spiral groove of the nut and a spiral groove of the screw shaft). This guarantees not to emit dust produced inside the nut, and attains dust reduction effect higher than that of the conventional ball screw.

Abstract: A ball circulating member constructed in an external face of a nut is provided with ball scooping sections for scooping up balls rolling on between ball screw grooves of a screw shaft and the nut, along a line tangent to a center orbital circle of the balls. The path length of a ball scooping path section formed in the ball scooping sections is set to be ½ or greater of the diameter of the ball.

Abstract: A method for manufacturing a semiconductor light emitting apparatus of side emission type includes disposing a light emitting device on a substrate having a predetermined electrode pattern. A side member is disposed on the substrate to be spaced apart from the light emitting device with a predetermined space. The light emitting device and the electrode pattern are electrically connected. A light reflecting member is disposed in the space between the side member and at least one side surface of the light emitting device so that the light reflecting member is in contact with the at least one side surface of the light emitting device. A light-transmitting sealing member is disposed to surround the light emitting device other than the at least one side surface that is in contact with the light reflecting member. A light-reflective ceiling member is disposed at least over the sealing member.

Abstract: Between two mutually adjoining load balls 5, there is interposed a retaining piece 10 having two concave surfaces 11 which are respectively opposed to the two adjoining load balls 5. The retaining piece 10 has an outside diameter dimension equal to or more than 0.5 times the outside diameter dimension of the load ball 5. Further, the retaining piece 10 has an outside diameter dimension which, when the retaining piece 10 passes through a screw groove circulation passage and a tube circulation passage, prevents the retaining piece 10 from touching the inner walls of these screw groove circulation passage and tube circulation passage, or has an outside diameter dimension which is equal to or less than 0.9 times the outside diameter dimension of the load ball.

Abstract: A ball screw apparatus includes: a screw shaft having a screw groove, a nut having a screw groove and holes, a number of balls rollably provided between the screw grooves, and a ball circulating member having an end portion to be fitted to the holes. The ball circulating member includes aside cap having leg portions to be fitted into the holes. Each of the leg portions contains a scooping up path or a returning path. The scooping up path and the retuning path are inclined with respect to outer peripheral faces of the leg portions. The holes include a slot substantially in parallel with directions of the screw grooves. The scooping up path and the returning path are directed substantially in a tangential direction of the screw shaft and inclined substantially toward a lead angle direction of the screw grooves.

Abstract: A ball screw device includes a screw shaft having a spiral first screw groove on its outer periphery; a nut having a spiral second screw groove formed on the inner periphery corresponding to the first screw groove so as to be screw-engaged with the screw shaft and having a pair of circulating holes on the side; a plurality of rolling elements rollably mounted in a load region formed between the first and second screw grooves; and a circulating member of resin having a rolling-element circulating path formed therein which scoops up the rolling elements rolling along the load region from the one of the pair of circulating holes to be guided to the outside of the nut and returns the rolling elements from the other of the pair of circulating holes to the load region, and having both ends fit in the pair of circulating holes. The circulating member is made of resin and fixed onto the nut using a metallic holding member.

Abstract: The invention provides a ball screw apparatus which suppresses abrasion and damage by competition of balls, controls spaces between retaining pieces and balls, and prevents retaining pieces from falling, thereby enabling to more improve operating ability. The retaining pieces are positioned between the balls running in a ball rolling path, such that a sum total of the spaces between the retaining pieces and the balls is 50% or less of an outer diameter size of the retaining piece, and at the same time a contact angle between the retaining piece and the ball is 25° or above to 40° or below.

Abstract: In a ball screw, a nut is fitted with the outer periphery of a screw shaft, ball rolling grooves opposed to each other are formed in the screw shaft and the nut The ball rolling grooves cooperate in forming a ball rolling path therebetween. A tube as a return path disposed on the nut for connecting one end portion of the ball rolling path to the other end portion thereof, the ball rolling path and tube cooperate in forming an endless circulation path. A plurality of load balls are disposed within the endless circulation path. The position of the tube cannot be limited to a single specific position. In the ball screw, retaining pieces are respectively inserted between the mutually adjacent ones of the load balls disposed within the endless circulation path.

Abstract: The ball screw comprises a shaft including a spiral-shaped shaft groove having a semicircular-shaped (Gothic-arch-shaped) section, a nut including a spiral-shaped nut ball groove which corresponds to the shaft groove and has a semicircular-shaped (Gothic-arch-shaped) section, a large number of balls rotatably fitted into between the nut ball groove and shaft groove in such a manner that they are held by and between these two grooves, and a circulation member capable of defining a ball circulation passage for allowing the balls to circulate endlessly therethrough, wherein a portion of the nut ball groove is formed larger in the effective diameter than the remaining portions of the nut.

Abstract: A linear motion device includes an inner member and an outer member cooperatively forming a ball circulating path therebetween, a plurality of balls rollably disposed in the ball circulating path, and a plurality of retaining pieces interposed between the balls, wherein the ratio of a ball-to-ball direction force applied to the retaining piece by the balls disposed at the both sides thereof to the elastic displacement of the retaining piece by the force is adjusted to a range of from 0.1 to 10 [N/?m] from 0.1 to 10 [N/?m] by predetermining a bore diameter of a through-hole formed at the central portion of the retaining piece to a range of from 35% to 65% of a diameter of the ball.

Abstract: A spacer between adjacent balls of, for example, a ball screw device or a linear motion device has an outer periphery that is concave such that the spacer is elastically deformed to be in substantially circular line contact with the adjacent balls and that a distance therebetween is variable.

Abstract: The ball screw 1 includes: a screw shaft 2, on the outer circumferential surface of which a spiral screw groove 2a is formed; a nut, on the inner circumferential surface of which a screw groove 3a opposed to the screw shaft 2 is formed; and a plurality of balls 4 arranged in a rolling element rolling passage 6, which is formed between both the screw grooves 2a, 3a, under the condition that the plurality of balls 4 can be freely rolled. The nut 3 is fixed to a side cap 7 for scooping up the rolling balls 4 at one end of the rolling element rolling passage 6 so that the rolling balls 4 can be sent to the other end.

Abstract: Between two mutually adjoining load balls 5, there is interposed a retaining piece 10 having two concave surfaces 11 which are respectively opposed to the two adjoining load balls 5. The retaining piece 10 has an outside diameter dimension equal to or more than 0.5 times the outside diameter dimension of the load ball 5. Further, the retaining piece 10 has an outside diameter dimension which, when the retaining piece 10 passes through a screw groove circulation passage and a tube circulation passage, prevents the retaining piece 10 from touching the inner walls of these screw groove circulation passage and tube circulation passage, or has an outside diameter dimension which is equal to or less than 0.9 times the outside diameter dimension of the load ball.

Abstract: A side cap 17 is formed by two ball circulating member-forming members 23 and 23 divided from each other along a division line PL extending in a direction of advancing of balls 15 passing through the interior of the side cap. The side cap 17 includes ball scoop-up portions 24 each for scooping-up the balls 15 from a ball track passageway 8 at one side thereof, and a ball circulating passageway 27 (formed integrally with the ball scoop-up portions) for returning the balls 15, scooped-up at the ball scoop-up portion 24, to the ball track passageway 8 at the other side thereof. The side cap has notch portions 25 formed respectively at scoop-up proximal end portions 24a thereof integrally connecting the ball scoop-up portions 24 respectively to the ball circulating passageway 27. The division line PL is formed in such a position that it beforehand cuts the notch portion 25 at the one side and the notch portion 25 at the other side.

Abstract: A ball circulating member constructed in an external face of a nut is provided with ball scooping sections for scooping up balls rolling on between ball screw grooves of a screw shaft and the nut, along a line tangent to a center orbital circle of the balls. The path length of a ball scooping path section formed in the ball scooping sections is set to be ½ or greater of the diameter of the ball.

Abstract: The invention is a ball screw, comprising: a shaft having a spiral-shaped shaft; a nut having a spiral-shaped nut ball groove and screwed with the shaft via a plurality of balls; and a ball circulation passage for raking the plurality of balls at one end of the ball rolling, wherein an end part of the ball circulation passage is connected to one end part of the ball rolling passage in such a manner that: a gap ?t formed between a ball contacting part of the nut ball groove contacted with the ball and an inner circumferential surface of the end part of the ball circulation passage is set 0.2 mm or less; and a change of angle in a ball rolling direction is 10° or less, the change caused by raking the ball from the ball rolling passage to the ball circulation passage.