Abstract: A picture generation apparatus includes: a light source substrate on which a light source is mounted; an optical member through which light emitted from the light source is transmitted; a display device configured to form, by the light transmitted through the optical member, light for generating a predetermined picture; a heat sink configured to dissipate heat generated from the light source substrate; and a lens holder configured to hold the optical member. The lens holder includes first engagement portions, and the heat sink includes second engagement portions. Each of the first engagement portions and a respective one of the second engagement portions are fixed to each other, so that the light source substrate is positioned and fixed in a state of being interposed between the lens holder and the heat sink.

Abstract: A light guide for a vehicle lamp includes a rod-shaped portion and a plate-shaped portion. The rod-shaped portion includes a rod-shaped light guide portion and a connecting projection portion projecting from a peripheral surface of the rod-shaped light guide portion and extending along the rod-shaped light guide portion. The plate-shaped portion includes two principal surfaces facing opposite to each other and a plate-shaped portion side surface connecting the two principal surfaces. The light guide is a multi-color molded product in which the rod-shaped portion is formed of a first resin material and the plate-shaped portion is formed of a second resin material containing a light diffusing agent. The rod-shaped light guide portion is connected to the side surface of the plate-shaped portion by the connecting projection portion.

Abstract: A light guide for a vehicle lamp includes a rod-shaped portion and a plate-shaped portion. The rod-shaped portion includes a rod-shaped light guide portion and a connecting projection portion projecting from a peripheral surface of the rod-shaped light guide portion and extending along the rod-shaped light guide portion. The plate-shaped portion includes two principal surfaces facing opposite to each other and a plate-shaped portion side surface connecting the two principal surfaces. The light guide is a multi-color molded product in which the rod-shaped portion is formed of a first resin material and the plate-shaped portion is formed of a second resin material containing a light diffusing agent. The rod-shaped light guide portion is connected to the side surface of the plate-shaped portion by the connecting projection portion.

Abstract: A projection lens formed of a light-transmitting resin including an incidence part on which light is incident, an emission part, a peripheral edge portion, and a thick part. Light is incident on the incidence part. The emission part emits the light incident from the incidence part. The peripheral edge portion is provided at a boundary between the incidence part and the emission part. The thick part is provided at a part of the peripheral edge portion, made thicker in an optical axis direction than other parts of the peripheral edge portion and having a gate mark formed at least on a part of an outer peripheral surface of the thick part.

Abstract: A vehicle lamp according to an aspect of the present invention includes a light source, a metal light-source stage including a light-source mounting portion, and a lens member that emits light from the light source toward the front of the lamp. The light-source stage includes a support portion for the lens member. The lens member includes a leg projecting toward the light-source stage and having an end that is supported by the support portion. The support portion includes three projections that abut the leg in a state in which the leg is supported by the support portion and position the lens member in a direction of an optical axis. The three projections are positioned relative to one another such that at least a portion of the light source lies in an extension range of a triangle with vertices given by the three projections.

Abstract: A vehicle lamp according to an aspect of the present invention includes a light source, a metal light-source stage including a light-source mounting portion, and a lens member that emits light from the light source toward the front of the lamp. The light-source stage includes a support portion for the lens member. The lens member includes a leg projecting toward the light-source stage and having an end that is supported by the support portion. The support portion includes three projections that abut the leg in a state in which the leg is supported by the support portion and position the lens member in a direction of an optical axis. The three projections are positioned relative to one another such that at least a portion of the light source lies in an extension range of a triangle with vertices given by the three projections.

Abstract: An automotive lamp includes an LED, a substrate that mounts the LED, a reflector that reflects the light emitted from the LED, and an projection lens having an incident surface, which receives the light reflected by the reflector, and an emission surface that emits the light toward a front area of the automotive lamp. A fine asperity structure is formed on the incident surface of the projection lens. The fine asperity structure includes recesses or raised portions formed with the pitch less than or equal to the visible light wavelength.

Abstract: Provided is a molding mold including a fixed mold and a movable mold which are caused to abut on each other so as to form a cavity. An air supply path configured to supply air and a gas discharge path configured to discharge a gas are formed in the fixed mold or the movable mold, the air supply path and the gas discharge path are communicated with the cavity, and a molten resin is filled in the cavity in a state where the cavity is maintained at a pressure higher than an atmospheric pressure by the air supplied from the air supply path.

Abstract: A projection lens formed of a light-transmitting resin including an incidence part on which light is incident, an emission part, a peripheral edge portion, and a thick part. Light is incident on the incidence part. The emission part emits the light incident from the incidence part. The peripheral edge portion is provided at a boundary between the incidence part and the emission part. The thick part is provided at a part of the peripheral edge portion, made thicker in an optical axis direction than other parts of the peripheral edge portion and having a gate mark formed at least on a part of an outer peripheral surface of the thick part.

Abstract: A resin optical member allows light to pass therethrough. The resin optical member includes a fine asperity portion formed with fine asperity structure and a flat portion not formed with fine asperity structure. The fine asperity structure include concavities or convexities formed at a pitch equal to or less than a wavelength of visible light. The fine asperity structure includes concavities or convexities having a height 37 nm or more.

Abstract: An automotive lamp includes an LED, a substrate that mounts the LED, a reflector that reflects the light emitted from the LED, and an projection lens having an incident surface, which receives the light reflected by the reflector, and an emission surface that emits the light toward a front area of the automotive lamp. A fine asperity structure is formed on the incident surface of the projection lens. The fine asperity structure includes recesses or raised portions formed with the pitch less than or equal to the visible light wavelength.

Abstract: A resin part of a vehicular lamp and a method for producing such a part in which a metallic vapor deposition coating for forming a reflective surface is formed directly on a surface of a resin body part without applying an undercoating layer. The body of the resin part is produced by injecting molten resin into a cavity of a molding die in which a heat insulating layer is formed on a portion of the cavity surface corresponding to the reflective surface. A metallic vapor deposition coating is applied directly to the portions of the body of the resin part which were in contact with the heat insulating layer during injection molding.

Abstract: To provide a method and an apparatus that can execute simultaneous injection molding of a plurality of different resin components using a mold construction that makes possible simultaneous main-sub component molding, without having to make the mold and device larger. A simultaneous main-sub component molding method utilizes a mold device having a first cavity C1 for molding a first resin component and a second cavity C2 for molding a second resin component. The mold cavities C1 and C2 are provided in a pair of opposed mold halves 100, 200 which close for the molding operation and open to remove the molded parts. In this mold device, injection molding of a plurality of different types of resin components 20, 23 is simultaneous. The first resin component is configured from a large resin component that is substantially circular, U-shaped, or L-shaped. The second resin component is configured from a small resin component that can be positioned inside an open portion of the first resin component.

Abstract: Camshaft sprockets are fixed to ends of an intake camshaft and an exhaust camshaft supported between a lower camshaft holder and an upper camshaft holder, and a timing chain is wrapped around these camshaft sprockets. A variable cam phase mechanism is provided on the intake camshaft sprocket, and an oil jet that issues a jet of oil for lubricating the timing chain is disposed between the exhaust camshaft sprocket and the lower camshaft holder. The jet of oil issued by the oil jet is directed toward the section where the intake camshaft sprocket is meshed with the timing chain. The oil jet that issues a jet of oil for lubricating the timing chain can thereby be arranged in a compact manner.

Abstract: A resin part of a vehicular lamp and a method for producing such a part in which a metallic vapor deposition coating for forming a reflective surface is formed directly on a surface of a resin body part without applying an undercoating layer. The body of the resin part is produced by injecting molten resin into a cavity of a molding die in which a heat insulating layer is formed on a portion of the cavity surface corresponding to the reflective surface. A metallic vapor deposition coating is applied directly to the portions of the body of the resin part which were in contact with the heat insulating layer during injection molding.

Abstract: A molding method and a molding die for producing a lens of a vehicular lamp wherein the lens has an improved appearance in that no weld lines are formed on the surface of the lens and the lens consequently has an improved mechanical strength. The molding die has a gathering area for molten resin in the molding cavity in a flow region of the molten resin to be formed into a lens. A heat insulating layer is formed on a cavity face on the side of the lens surface at the gathering area for the molten resin in the molding die, as a result of which instantaneous cooling is prevented. Accordingly, a skin layer formed on the side of the lens surface at the gathering area is very thin, thereby preventing the generation of a weld line, which could otherwise be generated if thick skin layers produced when high-temperature molten resin directly comes into contact with steel material and cooled instantaneously are gathered together.

Abstract: A valve operating system in an internal combustion engine includes a cam shaft provided with a valve operating cam, a rocker arm having a pair of support wall portions which are integrally connected at their base ends to a swinging support portion swingably supported on a support member mounted on a cylinder head and which are opposed to each other at a distance in a direction along the swinging axis of the swinging support portion, a support shaft supported between the support wall portions, and a roller which is rotatably supported on the support shaft with a bearing interposed therebetween so as to be in rolling contact with the valve operating cam. A lower connecting wall interconnecting lower portions of the base ends of the support wall portions is projectingly provided on the swinging support portion in a manner opposed to an outer peripheral surface of a lower portion of the roller. Thus, it is possible to increase the rigidity of the rocker arm, while avoiding an increase in size of the rocker arm.

Abstract: An electric discharge is generated between an electric discharge surface treatment electrode and a wire electrode, and an electric discharge surface treatment material is stuck on the surface of the wire electrode by the energy of the electric discharge. An electric discharge is then generated between a work piece and the wire electrode on which the electric discharge surface treatment material is stuck, and a surface modified layer is formed on the surface of the work piece by the energy of the electric discharge.

Abstract: Camshaft sprockets are fixed to ends of an intake camshaft and an exhaust camshaft supported between a lower camshaft holder and an upper camshaft holder, and a timing chain is wrapped around these camshaft sprockets. A variable cam phase mechanism is provided on the intake camshaft sprocket, and an oil jet that issues a jet of oil for lubricating the timing chain is disposed between the exhaust camshaft sprocket and the lower camshaft holder. The jet of oil issued by the oil jet is directed toward the section where the intake camshaft sprocket is meshed with the timing chain. The oil jet that issues a jet of oil for lubricating the timing chain can thereby be arranged in a compact manner.

Abstract: In a valve operating system for an internal combustion engine, a support shaft supporting a roller is fitted in a fitting bore of a rocker arm, and a pin fixed in the rocker arm engages with an engage groove provided on the outer surface of the support shaft so as to extend in a direction tangential to an imaginary circle about the axis of the support shaft, an insertion bore which extends in a straight line and connects to an inner surface of a fitting bore at a position corresponding to the engage groove of the support shaft is provided in the rocker arm and the pin engaging with the engage groove by being inserted into the insertion bore is engaged with the rocker arm by crimping at least one end of the pin with flat punches so as to be fixed in the rocker arm. The pin can thus be fixed effectively in the rocker arm while maintaining the rigidity of the rocker arm.