Abstract: An ocular optical system (EL) comprises, in order from an eye point (EP), a first lens group (G1) having a positive refractive power and a second lens group (G2) having a positive refractive power. The second lens group (G2) includes a cemented lens having two optical members cemented together. A cemented surface of the cemented lens is a diffraction optical surface configuring a diffraction grating. A lens surface on one side in a lens constituting the first lens group (G1) is a first Fresnel surface (FSa), and a lens surface on one side in the cemented lens of the second lens group (G2) is a second Fresnel surface (FSb).

Abstract: The objective is to obtain an assembled battery that can relieve the stress acting on the circuit board in the case. This assembled battery of the present invention includes a case for retaining a plurality of single batteries side by side, an insulation cover covering one surface side of the single batteries, bus bars electrically connecting the terminals of adjacent single batteries and exposed from the insulation cover, and a circuit board disposed above the insulation cover. Mounted on a back surface of the circuit board are elastic contact members to be brought into pressure contact with the bus bars by fixing the circuit board onto the case, and the insulation cover or the bus bars are provided with claws which are support members for supporting the circuit board by coming in contact with a front surface of the circuit board.

Abstract: An ocular optical system (EL) comprises, in order from an eye point (EP), a first lens group (G1) having a positive refractive power and a second lens group (G2) having a positive refractive power. The second lens group (G2) includes a cemented lens having two optical members cemented together. A cemented surface of the cemented lens is a diffraction optical surface configuring a diffraction grating. A lens surface on one side in a lens constituting the first lens group (G1) is a first Fresnel surface (FSa), and a lens surface on one side in the cemented lens of the second lens group (G2) is a second Fresnel surface (FSb).

Abstract: The objective is to obtain an assembled battery that can relieve the stress acting on the circuit board in the case. This assembled battery of the present invention includes a case for retaining a plurality of single batteries side by side, an insulation cover covering one surface side of the single batteries, bus bars electrically connecting the terminals of adjacent single batteries and exposed from the insulation cover, and a circuit board disposed above the insulation cover. Mounted on a back surface of the circuit board are elastic contact members to be brought into pressure contact with the bus bars by fixing the circuit board onto the case, and the insulation cover or the bus bars are provided with claws which are support members for supporting the circuit board by coming in contact with a front surface of the circuit board.

Abstract: An imaging lens (PL) has an image surface (I) curved to have a concave surface facing an object and consists of, in order from the object along an optical axis (Ax): a front group (Ga) including four lenses (L1 to L4); and a back group (Gb) including a single lens (L5). The following conditional expression is satisfied. 0.25<Dab/TL<0.50 0.30<La/TL<0.55 where, Dab denotes a distance between the front group (Ga) and the back group (Gb) on the optical axis, La denotes a length of the front group (Ga) on the optical axis, and TL denotes a total length of the imaging lens (PL) (a distance between a vertex of a lens surface closest to the object and an axial image point corresponding to an infinite distant object).

Abstract: An imaging lens (PL) having an image surface (I) curved to have a concave surface facing an object, the imaging lens comprising five lenses including a positive lens and a negative lens. At least one negative lens in the five lenses is disposed to an image side of a positive lens. A set of the positive lens and the negative lens, as one of sets each including the positive lens and the negative lens disposed to the image side of the positive lens, that has largest positive refractive power as combined refractive power, satisfies a following conditional expression: 0.5<fc/f<1.2, where fc denotes a combined focal length of the positive lens and the negative lens with the largest positive refractive power as the combined refractive power, and f denotes a focal length of the imaging lens.

Abstract: The purpose of the present invention is to provide an assembled battery including a battery holder capable of holding single battery cells while automatically aligning the cells during assembly. In the assembled battery (100) according to the present invention, a plurality of single battery cells (101) arranged in a row and battery holders (144) disposed between the plurality of single battery cells (101) are held in a state of being mutually pressed in an arranged direction. The battery holders (144) include a positioning means (144f, 144g) that positions the single battery cells (101) by biasing the single battery cells (101), while being pressed in the arranged direction, in a direction intersecting the arranged direction.

Abstract: A battery module of includes a plurality of cells, a cooling plate, and a channel part formed in the cooling plate. The channel part includes a first channel part extending in an arrangement direction of the plurality of cells, a second channel part extending in parallel to the first channel part along the arrangement direction with a first partition part interposed between the first channel part and the second channel part, and a first communication part which brings one end of the first channel part of the arrangement direction and one end of the second channel part of the arrangement direction into communication with each other, and which turns a flowing direction of coolant in the first channel part and the second channel part.

Abstract: The purpose of the present invention is to provide an assembled battery including a battery holder capable of holding single battery cells while automatically aligning the cells during assembly. In the assembled battery (100) according to the present invention, a plurality of single battery cells (101) arranged in a row and battery holders (144) disposed between the plurality of single battery cells (101) are held in a state of being mutually pressed in an arranged direction. The battery holders (144) include a positioning means (144f, 144g) that positions the single battery cells (101) by biasing the single battery cells (101), while being pressed in the arranged direction, in a direction intersecting the arranged direction.

Abstract: A battery module of includes a plurality of cells, a cooling plate, and a channel part formed in the cooling plate. The channel part includes a first channel part extending in an arrangement direction of the plurality of cells, a second channel part extending in parallel to the first channel part along the arrangement direction with a first partition part interposed between the first channel part and the second channel part, and a first communication part which brings one end of the first channel part of the arrangement direction and one end of the second channel part of the arrangement direction into communication with each other, and which turns a flowing direction of coolant in the first channel part and the second channel part.

Abstract: It is an object of the present invention to enhance the orifice design freedom and easy machine ability in a fuel injection valve in which orifices are formed by press-working.

Abstract: An injector used for an internal combustion engine includes a valve needle which closes a fuel passage by contacting a valve seat and opens the fuel passage by separating from the valve seat. A coil and a magnetic core are provided to drive the valve needle, and an anchor is held in a relatively displaceable state with respect to the valve needle. A first biasing device biases the valve needle in a direction opposite to a direction of a drive force, and a second biasing device biases the anchor in the direction of the drive force with a set load smaller than that of the first biasing device. A restricting feature restricts relative displacement of the anchor with respect to the valve needle in the direction of the drive force.

Abstract: Each of the injection holes has an inclined angle with respect to a center line of an injection valve main body as well as the inclined angle of each of the injection holes is provided with a predetermined offset amount with respect to a target inclination angle of a center of gravity position of each of the injected fuel sprays. The predetermined offset amount is set based on a correction amount for correcting positional drift with respect to the target direction of the center of gravity position of the fuel spray.

Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.

Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.

Abstract: A fuel injection valve comprises a convex portion prominently formed on an outer end surface of a nozzle body, stepped recesses each of which has plural steps formed by press forming on the convex portion, and multi orifices as fuel nozzle holes formed by press forming so that an outlet of each of the orifices is located at a bottom face of each of the stepped recesses. Furthermore, the fuel injection valve has plural sets each of which comprises one of the stepped recesses and the relevant orifice, the orifices incline to each other, and a step on a downstream side in each of the stepped recesses has a larger diameter than a step on an upstream side thereof.

Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.

Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.

Abstract: An injection valve has a nozzle body, a valve needle positioned in the nozzle body, an actuator for actuating the valve needle, and an orifice plate fixed at an end of the nozzle body. The orifice plate has a valve seat for cooperating with the valve needle and an orifice for injecting a fluid. The orifice plate is provided with a projection having a convex-curved surface on an orifice outlet side of the orifice plate. A flat surface portion is formed in the area of the convex-curved surface, and the outlet of the orifice is located in the flat surface portion.