Abstract: A socket for electronic components includes a case that includes through holes of which inner wall surfaces have conductivity, and a ground contact unit that is disposed in one of the through holes and is electrically connected to an inner wall surface of the through hole. The ground contact unit includes a holding member that holds a conductive member and is fixed in the through hole. The conductive member has elasticity, and includes an intermediate portion held by the holding member, an upper extension portion extending upward from the intermediate portion, and a lower extension portion extending downward from the intermediate portion. The lower extension portion includes a ground extension portion that comes into elastic contact with the inner wall surface of the through hole, a fixed portion that is fixed to a substrate, and an impact absorbing portion that is formed between the fixed portion and the intermediate portion.

Abstract: A socket for electronic components includes a case that includes through holes of which inner wall surfaces have conductivity, and a ground contact unit that is disposed in one of the through holes and is electrically connected to an inner wall surface of the through hole. The ground contact unit includes a holding member that holds a conductive member and is fixed in the through hole. The conductive member has elasticity, and includes an intermediate portion held by the holding member, an upper extension portion extending upward from the intermediate portion, and a lower extension portion extending downward from the intermediate portion. The lower extension portion includes a ground extension portion that comes into elastic contact with the inner wall surface of the through hole, a fixed portion that is fixed to a substrate, and an impact absorbing portion that is formed between the fixed portion and the intermediate portion.

Abstract: An electronic component socket includes a shield plate set forming an opening portion, a movement member including a conductive member having a contact portion capable of contacting an electrode terminal of an electronic component, an elastic member which is electrically connectable to a wiring substrate, and includes a biasing portion having a biasing force and a base portion fixing the biasing portion. The movement member is disposed to move vertically above the elastic member in the opening portion, and the biasing portion elastically contacts the movement member. The shield plate set includes a protrusion protruding in the opening portion, the movement member includes a concave portion which engages with the protrusion, the conductive member includes an inclined surface portion which extends so as to be inclined on an opposite side of the concave portion, and the biasing portion of the elastic member elastically contacts the inclined surface portion.

Abstract: A magnesium alloy structural member having excellent corrosion resistance is provided. The magnesium alloy structural member includes a magnesium alloy substrate that contains more than 7.5% by mass of Al and an anticorrosive layer formed on a surface of the substrate by chemical conversion treatment. The substrate contains a precipitate, typically, particles dispersed therein. The particles are made of an intermetallic compound containing at least one of Al and Mg and have an average particle size of 0.05 ?m or more and 1 ?m or less. The total area of the particles accounts for 1% by area or more and 20% by area or less. The anticorrosive layer includes a lower sublayer and a surface sublayer on the substrate in this order. The surface sublayer is denser than the lower sublayer. The substrate of the magnesium alloy structural member has high corrosion resistance because of a high Al content.

Abstract: A socket for electronic components configured to connect each electrode terminal of an electronic component to a wiring of a wiring board with a shield member having electrical conductivity and multiple openings being disposed on the wiring board, with a contact unit configured to electrically conduct the electrode terminal of the electronic component and the wiring of the wiring board PB being disposed in the openings, and with the contact unit including a ground contacting portion configured to electrically conduct with the shield member, and when the contact unit is for grounding, grounding is performed by the ground contacting portion and the shield member being brought into contact and electrically conducting.

Abstract: A socket for electronic components includes a shield plate assembly that is formed by combining first shield plates with second shield plates in the form of a lattice and has conductivity, and contact units electrically connected to electrode terminals of electronic components are disposed in openings of the lattice of the shield plate assembly so that the electrode terminals are electrically connected to the wiring of a wiring board. The shield plate assembly is formed in a shape where lines where openings of the lattice are lined up in a first direction are arranged side by side in a second direction orthogonal to the first direction, and the openings of the adjacent lines are formed so as to be shifted relative to the openings of the next lines in the first direction by a half of the length of the side of the opening that extends in the first direction.

Abstract: An electronic component socket includes a shield plate set forming an opening portion, a movement member including a conductive member having a contact portion capable of contacting an electrode terminal of an electronic component, an elastic member which is electrically connectable to a wiring substrate, and includes a biasing portion having a biasing force and a base portion fixing the biasing portion. The movement member is disposed to move vertically above the elastic member in the opening portion, and the biasing portion elastically contacts the movement member. The shield plate set includes a protrusion protruding in the opening portion, the movement member includes a concave portion which engages with the protrusion, the conductive member includes an inclined surface portion which extends so as to be inclined on an opposite side of the concave portion, and the biasing portion of the elastic member elastically contacts the inclined surface portion.

Abstract: A magnesium alloy material having excellent impact resistance is provided. The magnesium alloy material is composed of a magnesium alloy that contains more than 7.5% by mass of Al and has a Charpy impact value of 30 J/cm2 or more. Typically, the magnesium alloy material has an elongation of 10% or more at a tension speed of 10 m/s in a high-speed tensile test. The magnesium alloy is composed of a precipitate, typically made of an intermetallic compound containing at least one of Al and Mg, and contains particles having an average particle size of 0.05 ?M or more and 1 ?m or less dispersed therein. The total area of the particles accounts for 1% by area or more and 20% by area or less. The magnesium alloy material containing fine precipitate particles dispersed therein has high impact absorption capacity through dispersion strengthening and has excellent impact resistance.

Abstract: The invention offers a magnesium alloy sheet material having excellent plastic processibility and rigidity and a magnesium alloy formed body having excellent rigidity. The sheet material has magnesium alloy that forms the matrix containing hard particles. The region from the surface of the sheet material to a position away from the surface by 40% of the thickness of the sheet material is defined as the surface region, and the remaining region as the center region. Hard particles existing in the center region have a maximum diameter of more than 20 ?m and less than 50 ?m, and hard particles existing in the surface region have a maximum diameter of 20 ?m or less. Because the hard particles existing at the surface side are fine particles, they are less likely to become the starting point of cracking or another defect at the time of plastic processing. Because the hard particles existing in the center region are coarse, they can increase the rigidity of the sheet material.

Abstract: The method of producing a magnesium alloy joined part has the following steps: a joining step of joining a reinforcing material made of metal to a plate material made of magnesium alloy without allowing an organic material to remain at the joined portion and a plastic-working step of performing plastic working on the plate material to which the reinforcing material is joined. A desirable means of joining the reinforcing material to the plate material can be to use an inorganic adhesive. Because the magnesium alloy joined part is formed by a structure in which the reinforcing material is joined to the plate material, in comparison with the case where the reinforcing material is formed by machining or the like, the magnesium alloy structural member can be obtained with high production efficiency.

Abstract: A socket for electronic components includes a shield plate assembly that is formed by combining first shield plates with second shield plates in the form of a lattice and has conductivity, and contact units electrically connected to electrode terminals of electronic components are disposed in openings of the lattice of the shield plate assembly so that the electrode terminals are electrically connected to the wiring of a wiring board. The shield plate assembly is formed in a shape where lines where openings of the lattice are lined up in a first direction are arranged side by side in a second direction orthogonal to the first direction, and the openings of the adjacent lines are formed so as to be shifted relative to the openings of the next lines in the first direction by a half of the length of the side of the opening that extends in the first direction.

Abstract: A socket for electronic components configured to connect each electrode terminal of an electronic component to a wiring of a wiring board with a shield member having electrical conductivity and multiple openings being disposed on the wiring board, with a contact unit configured to electrically conduct the electrode terminal of the electronic component and the wiring of the wiring board PB being disposed in the openings, and with the contact unit including a ground contacting portion configured to electrically conduct with the shield member, and when the contact unit is for grounding, grounding is performed by the ground contacting portion and the shield member being brought into contact and electrically conducting.

Abstract: A magnesium alloy member having mechanical properties and corrosion resistance and a method of manufacturing the magnesium alloy member are provided. A magnesium alloy member has a base material made of a magnesium alloy, and an anticorrosive film formed on the base material. The base material is a rolled magnesium alloy including 5 to 11% by mass of Al. By using a base material including a large amount of Al, a magnesium alloy member having excellent mechanical properties and high corrosion resistance can be produced. In addition, by using a rolled material, the number of surface defects at the time of casting is small, and the frequency of compensation processes such as undercoating and puttying can be reduced.

Abstract: There is provided a lightweight, high strength impact-resistant component having a good impact energy absorptive property. The impact-resistant component is composed of a magnesium alloy containing Al in an amount of more than 7.3% by mass and 12% or less by mass. A rectangular test piece is produced from the impact-resistant component; an iron ball 30 having a mass of 225 g is allowed to freely fall toward a central portion of the test piece while both end portions of the test piece are fixed to supports 21 and 22; and, when a distance between a position from which the iron ball 30 is allowed to freely fall and the test piece is assumed to be a fall height, a fall height H at which a dent is not generated on the test piece by the iron ball 30 is measured. The impact-resistant component has a fall height H of more than 340 mm. In the impact-resistant component of the present invention, the fall height at which a dent is not generated is large.

Abstract: A magnesium alloy structural member having excellent corrosion resistance is provided. The magnesium alloy structural member includes a magnesium alloy substrate that contains more than 7.5% by mass of Al and an anticorrosive layer formed on a surface of the substrate by chemical conversion treatment. The substrate contains a precipitate, typically, particles dispersed therein. The particles are made of an intermetallic compound containing at least one of Al and Mg and have an average particle size of 0.05 ?m or more and 1 ?m or less. The total area of the particles accounts for 1% by area or more and 20% by area or less. The anticorrosive layer includes a lower sublayer and a surface sublayer on the substrate in this order. The surface sublayer is denser than the lower sublayer. The substrate of the magnesium alloy structural member has high corrosion resistance because of a high Al content.

Abstract: There is provided a composite structural member having high rigidity even at a small thickness, the composite structural member being easily attachable to a target object. A composite structural member 1A includes a metal base material 10A, a resin formed article 11, and a resin film layer 12 that covers a surface of the metal base material 10A. The metal base material 10A is a plastically formed material formed by subjecting a flat sheet material having a thickness of 50 ?m or more to press forming. The metal base material 10A and the resin film layer 12 are joined together using a constituent resin of the resin formed article 11. The composite structural member 1A includes the metal base material 10A and thus can have excellent strength and rigidity even at a smaller thickness. The composite structural member 1A includes the resin formed article 11. An attaching portion to the target object can be easily formed in the resin formed article 11.

Abstract: A magnesium alloy material having excellent impact resistance is provided. The magnesium alloy material is composed of a magnesium alloy that contains more than 7.5% by mass of Al and has a Charpy impact value of 30 J/cm2 or more. Typically, the magnesium alloy material has an elongation of 10% or more at a tension speed of 10 m/s in a high-speed tensile test. The magnesium alloy is composed of a precipitate, typically made of an intermetallic compound containing at least one of Al and Mg, and contains particles having an average particle size of 0.05 ?M or more and 1 ?m or less dispersed therein. The total area of the particles accounts for 1% by area or more and 20% by area or less. The magnesium alloy material containing fine precipitate particles dispersed therein has high impact absorption capacity through dispersion strengthening and has excellent impact resistance.

Abstract: The method of producing a magnesium alloy joined part has the following steps: a joining step of joining a reinforcing material made of metal to a plate material made of magnesium alloy without allowing an organic material to remain at the joined portion and a plastic-working step of performing plastic working on the plate material to which the reinforcing material is joined. A desirable means of joining the reinforcing material to the plate material can be to use an inorganic adhesive. Because the magnesium alloy joined part is formed by a structure in which the reinforcing material is joined to the plate material, in comparison with the case where the reinforcing material is formed by machining or the like, the magnesium alloy structural member can be obtained with high production efficiency.

Abstract: A magnesium alloy structural member includes a base material composed of a magnesium alloy having an aluminum content of 4.5% by mass to 11% by mass, in which the base material has a pair of first and second surfaces, the first surface and the second surface being opposite each other, in which when a distance between the first surface and the second surface is defined as a thickness and when surface area regions are defined as regions extending from the first and second surfaces to positions 20 ?m from the respective first and second surfaces in the thickness direction, in at least both the surface area regions, 10 or more fine precipitates are present in any 20 ?m×20 ?m subregion of each of the surface area regions, each of the fine precipitates containing both Mg and Al and having a greatest dimension of 0.5 ?m to 3 ?m.

Abstract: The method of producing a magnesium alloy joined part has the following steps: a joining step of joining a reinforcing material made of metal to a plate material made of magnesium alloy without allowing an organic material to remain at the joined portion and a plastic-working step of performing plastic working on the plate material to which the reinforcing material is joined. A desirable means of joining the reinforcing material to the plate material can be to use an inorganic adhesive. Because the magnesium alloy joined part is formed by a structure in which the reinforcing material is joined to the plate material, in comparison with the case where the reinforcing material is formed by machining or the like, the magnesium alloy structural member can be obtained with high production efficiency.