Abstract: An optical fiber ribbon that includes 16-48 parallel optical fiber core wires and a connecting resin that connects adjacent optical fiber core wires. The outer diameter D of the optical fiber core wires is 160-220 ?m, and when N is the number of optical fiber core wires and S is the bending strain of the optical fiber core wires, S=0.167×N/2(%) or less.

Abstract: First and second slot edge portions of a conductive main portion are long in a first direction and sandwich a slot in a second direction. An open portion is formed a part different from the first slot edge portion and opens the slot outside the conductive main portion. A first part of a radiation element extends from an end portion of the first slot edge portion in the second direction. A second part of the radiation element extends from an end portion of the first part in the first direction. An additional element extends from the second part toward a second specific area through a first specific area. In a third direction, the first specific area and the second specific area overlap with the first slot edge portion and the second slot edge portion, respectively.

Abstract: An optical fiber cable provided with a plurality of optical fiber cores and a sheath coating the periphery of the plurality of optical fiber cores. The number of optical fiber cores per unit area of the optical fiber cable in a cross-section of the optical fiber cable perpendicular to the longitudinal direction is larger than 6.3 cores/mm2 and smaller than or equal to 12.6 cores/mm2. The optical fiber cores each have an outer diameter of 175-185 ?m inclusive.

Abstract: An optical fiber cable includes a plurality of optical fibers, a tensile strength member set that is disposed along the plurality of optical fibers in a longitudinal direction of the optical fiber cable, and a sheath that covers the plurality of optical fibers from outside and encloses the tensile strength member set in the sheath. In the optical fiber cable, at least four tensile strength member sets are embedded in the sheath in a state where the four tensile strength member sets are apart from each other in a radial direction of the optical fiber cable, the sheath includes a flame-retardant inorganic substance and a release agent, and a distance from one of the four tensile strength member sets to a surface layer of the sheath is 0.5 mm or more.

Abstract: A weather-resistant flame-retardant resin composition includes: a polyolefin resin; a mixture of (poly) phosphate compounds, a total content of which is from 10 to 50 parts by mass with respect to 100 parts by mass of the polyolefin resin; 0.1 to 10 parts by mass a non-crosslinked silicone raw rubber having a number-average molecular weight of 10,000 to 1,000,000; and 0.1 to 20 parts by mass of an inorganic UV light shielding agent, and an electric wire and an optical fiber cable whose jacket is formed by the weather-resistant flame-retardant resin.

Abstract: A multiband antenna has a conductor main portion, a first ground terminal and a second ground terminal. The conductor main portion is long in a first direction and extends in a horizontal plane defined by the first direction and a second direction. The conductor main portion has a first long edge and a second long edge at both ends thereof in the second direction, respectively. The conductor main portion is formed with a slot and an opening portion. The slot is long in the first direction. The opening portion is provided in the first long edge and connects the slot with an outside of the conductor main portion. The first ground terminal and the second ground terminal extend from the second long edge. The first ground terminal and the second ground terminal are connected to a host conductor when the multiband antenna is used.

Abstract: A multiband antenna is connected to a host conductor when used. The multiband antenna extends long in a first direction. The multiband antenna has a conductor main portion and a ground terminal. The conductor main portion extends in a horizontal plane which is defined by the first direction and a second direction perpendicular to the first direction. The conductor main portion is formed with an opening and a slot. The slot extends long in the first direction. The conductor main portion has a first short edge, a second short edge, a first long edge and a second long edge. The ground terminal is connected to the host conductor when the multiband antenna is used. The ground terminal extends from the second long edge. The ground terminal is positioned closer to the first short edge than to the second short edge in the first direction.

Abstract: An optical fiber ribbon that includes 16-48 parallel optical fiber core wires and a connecting resin that connects adjacent optical fiber core wires. The outer diameter D of the optical fiber core wires is 160-220 ?m, and when N is the number of optical fiber core wires and S is the bending strain of the optical fiber core wires, S=0.167×N/2(%) or less.

Abstract: To reduce rattling between a slide lever and a release lever and abnormal noise. A connecting end part (172) of a slide lever (17) has a tubular shape, and a front end part (161a) of a release lever (161) is inserted in the connecting end part (172) with a connection spring member (180) therebetween. The connection spring member (180) is formed of a worked wire material for springs and has a bent end (181a) located forward and wire parts (181) extending rearward from the bent end (181a). Protruding engagement parts (183) are formed in the wire parts (181). The wire parts (181) are placed inside the front end part (161a) of the release lever (161), and the protruding engagement parts (183) are made to protrude from engagement protrusion holes (161e) of the release lever (161) in advance, and then the tubular connecting end part (172) of the slide lever (17) is fitted on the outer side of the front end part (161a).

Abstract: This optical fiber tape core wire (1) has: a plurality of optical fiber core wires (11) that are arranged in parallel to each other; a connection resin (21) that connects the plurality of optical fiber core wires (11); and a bridge part (21a) that is formed of the connection resin (21). The plurality of optical fiber core wires (11) are arranged in a state in which a side surface of an optical fiber core wire (11) is separated from or in contact with a side surface of another adjacent optical fiber core wire (11), the bridge part (21a) is provided between the optical fiber core wires (11) arranged in the separated state, the outer diameter of the optical fiber core wire (11) is 220 ?m or less, and the average distance between the centers of the plurality of optical fiber core wires (11) is 220-280 ?m.

Abstract: This intermittent connection-type optical fiber tape core is configured in a manner such that in a state where a plurality of optical fiber cores are arranged in parallel in a direction perpendicular to the lengthwise direction of said plurality of optical fiber cores, some or all of the intervals between the plurality of optical fiber cores are intermittently provided in the lengthwise direction with connected sections where the intervals between adjacent optical fiber cores are connected and non-connected sections where the intervals between adjacent optical fiber cores are not connected. The outer diameter of each of the plurality of optical fiber cores is 160-220 ?m, inclusive. The catenary amount of the tip end of the intermittent connection-type optical fiber tape core projecting from the held location is 0.1-2 mm, inclusive, in a given state.

Abstract: To increase strength without any weight increase due to a thickness increase and without causing the machining problem in half-blanking, an external gear and an internal gear are ring-shaped gears, and external teeth and internal teeth each have a tooth width substantially corresponding to the thickness of an outer circumferential surface of the external gear or an inner circumferential surface of the internal gear. The external gear and the internal gear are ring-shaped gears, that is, each can be formed through the punching of a plate, and strength resulting from the engagement of the external teeth and the internal teeth corresponds to strength resulting from the thickness of the material plates forming the external gear and the internal gear. Accordingly, the external teeth and the internal teeth can have a wider tooth width, achieving higher strength than when half-blanking is used.

Abstract: A multiband antenna comprises a slot antenna and a radiation element. The slot antenna has a conductive plate. The conductive plate is formed with an opening portion and a slot. The slot partially opens through the opening portion. The slot extends long in a first direction. The radiation element has a first portion and a second portion. The first portion extends from the conductive plate toward an orientation away from the slot in a second direction perpendicular to the first direction. The first portion has a first length in the second direction. The second portion extends in the first direction from the first portion. The second portion has a second length in the first direction. The second length is greater than the first length.

Abstract: A substrate is transparent and has a mesh shape conductor pattern. In a first substrate, a conductor pattern includes arrays of circular closed curves, and respective adjacent arrays include arrays different in period, waveform, or phase. In a second substrate, the mesh shape is formed by two or more types of circular closed curves. In a third substrate, the mesh shape is formed by three or more types of circular closed curves. In a fourth substrate, a single type of circular closed curves is used, and one circular closed curve is surrounded by six circular closed curves. In a fifth substrate, a single type of circular closed curves is used. However, four circles contact with one circle at top, bottom, left, and right, is excluded. In a sixth substrate, one or more types of circular closed curves are used, and three or more types of openings are formed.

Abstract: A multiband antenna comprises a slot antenna and a radiation element. The slot antenna has a conductive plate. The conductive plate is formed with an opening portion and a slot. The slot partially opens through the opening portion. The slot extends long in a first direction. The radiation element has a first portion and a second portion. The first portion extends from the conductive plate toward an orientation away from the slot in a second direction perpendicular to the first direction. The first portion has a first length in the second direction. The second portion extends in the first direction from the first portion. The second portion has a second length in the first direction. The second length is greater than the first length.

Abstract: This loop antenna is provided with: an insulating substrate; an antenna portion that is a conductor provided on the substrate and includes a first feeding portion, a second feeding portion, and an antenna mesh portion having a mesh structure and forming a loop shape by connecting the two feeding portions to each other; and a dummy pattern part portion that is a conductor having a mesh structure and provided in a region surrounded by the antenna portion, and is isolated from the antenna portion. The dummy pattern portion has at least one cut portion that cuts a path included in the mesh structure.

Abstract: An optical fiber cable having a slot core which includes a plurality of ribs formed along a cable longitudinal direction and in which slot grooves for housing optical fibers are formed between the ribs. The optical fiber cable includes: subunits each of which is formed by bundling a plurality of intermittent-connection-type optical fiber ribbons in which a connection part where adjacent optical fibers are connected to each other and a non-connection part where adjacent optical fibers are not connected to each other are intermittently provided in the longitudinal direction among some or all of optical fibers; and a thin-skin-shaped tube having Young's modulus lower than Young's modulus of a material forming the slot core. The subunits are housed in the slot grooves, and among the subunits in the slot grooves, at least a subunit located at an outer peripheral part of the slot grooves is covered with the tube.

Abstract: An optical fiber cable having a slot core which includes a plurality of ribs formed along a cable longitudinal direction and in which slot grooves for housing optical fibers are formed between the ribs. The optical fiber cable includes: subunits each of which is formed by bundling a plurality of intermittent-connection-type optical fiber ribbons in which a connection part where adjacent optical fibers are connected to each other and a non-connection part where adjacent optical fibers are not connected to each other are intermittently provided in the longitudinal direction among some or all of optical fibers; and a thin-skin-shaped tube having Young's modulus lower than Young's modulus of a material forming the slot core. The subunits are housed in the slot grooves, and among the subunits in the slot grooves, at least a subunit located at an outer peripheral part of the slot grooves is covered with the tube.

Abstract: A weather-resistant flame-retardant resin composition includes: a polyolefin resin; a mixture of (poly) phosphate compounds, a total content of which is from 10 to 50 parts by mass with respect to 100 parts by mass of the polyolefin resin; 0.1 to 10 parts by mass a non-crosslinked silicone raw rubber having a number-average molecular weight of 10,000 to 1,000,000; and 0.1 to 20 parts by mass of an inorganic UV light shielding agent, and an electric wire and an optical fiber cable whose jacket is formed by the weather-resistant flame-retardant resin.

Abstract: This loop antenna is provided with: an insulating substrate; an antenna portion that is a conductor provided on the substrate and includes a first feeding portion, a second feeding portion, and an antenna mesh portion having a mesh structure and forming a loop shape by connecting the two feeding portions to each other; and a dummy pattern part portion that is a conductor having a mesh structure and provided in a region surrounded by the antenna portion, and is isolated from the antenna portion. The dummy pattern portion has at least one cut portion that cuts a path included in the mesh structure.