Abstract: A hydraulic unit for a vehicle brake apparatus having a master cylinder and a wheel cylinder includes a housing formed with a pipe line connecting between the master cylinder and the wheel cylinder, a pump disposed in the housing for sucking and discharging a brake fluid to boost pressure of the brake fluid, and a reservoir piston disposed in a hole formed in the housing so as to be movable slidably back and forth, the reservoir piston partitioning a reservoir chamber within the hole for temporarily storing the brake fluid discharged from the wheel cylinder. The hydraulic unit further includes a cover disposed in the hole to close one end on an atmospheric side of the hole, the cover being formed with a fluid reservoir chamber for storing the brake fluid leaking from the pump.

Abstract: A hydraulic unit for a vehicle brake apparatus having a master cylinder and a wheel cylinder includes a housing formed with a pipe line connecting between the master cylinder and the wheel cylinder, a pump disposed in the housing for sucking and discharging a brake fluid to boost pressure of the brake fluid, and a reservoir piston disposed in a hole formed in the housing so as to be movable slidably back and forth, the reservoir piston partitioning a reservoir chamber within the hole for temporarily storing the brake fluid discharged from the wheel cylinder. The hydraulic unit further includes a cover disposed in the hole to close one end on an atmospheric side of the hole, the cover being formed with a fluid reservoir chamber for storing the brake fluid leaking from the pump.

Abstract: A method for laser beam welding includes: forming a triangle protrusion on a light-absorption resin member; pressing a top of the protrusion on a translucent resin member; contacting the top of the protrusion and a part of the light-absorption resin member on the translucent resin member; irradiating a laser beam on the protrusion through the translucent resin member; and welding the translucent resin member to the light-absorption resin member with melted resin of the protrusion. The protrusion has a height, which provides to set deformation of the translucent resin member within a limit of a tensile strength of the translucent resin member, and the deformation of the translucent resin member is caused by the pressing the top of the protrusion.

Abstract: A method of laser welding two resin members includes the steps of: providing a first and a second resin member each having a joining surface; forming a ridge with a length on the joining surface of one of the first and second resin members, the ridge including a base portion and a tip portion that has smaller width and expansion rate in width than those of the base portion; placing one of the first and second resin members on the other so that the joining surfaces of the first and second resin members face each other with the ridge interposed therebetween; pressing one of the first and second resin members against the other so as to completely crush the tip portion of the ridge; and irradiating the base portion of the ridge with a laser beam while continuously pressing one of the first and second resin members against the other.

Abstract: A method for laser beam welding includes: forming a triangle protrusion on a light-absorption resin member; pressing a top of the protrusion on a translucent resin member; contacting the top of the protrusion and a part of the light-absorption resin member on the translucent resin member; irradiating a laser beam on the protrusion through the translucent resin member; and welding the translucent resin member to the light-absorption resin member with melted resin of the protrusion. The protrusion has a height, which provides to set deformation of the translucent resin member within a limit of a tensile strength of the translucent resin member, and the deformation of the translucent resin member is caused by the pressing the top of the protrusion.

Abstract: A collision sensing apparatus includes an acceleration sensor, first and second connector terminals, reference connector terminals and leads. The acceleration sensor is shaped into a square form. First and second contacts are provided in two diagonally opposed corner portions of the sensor. Reference contacts are arranged in the other two diagonally opposed corner portions of the sensor. The first and second connector terminals are opposed to the first and second contacts, respectively. The reference connector terminals are opposed to the reference contacts, respectively. The leads connect the first and second connector terminals and the reference connector terminals to the first and second contacts and the reference contacts.

Abstract: A collision sensing apparatus includes an acceleration sensor, first and second connector terminals, reference connector terminals and leads. The acceleration sensor is shaped into a square form. First and second contacts are provided in two diagonally opposed corner portions of the sensor. Reference contacts are arranged in the other two diagonally opposed corner portions of the sensor. The first and second connector terminals are opposed to the first and second contacts, respectively. The reference connector terminals are opposed to the reference contacts, respectively. The leads connect the first and second connector terminals and the reference connector terminals to the first and second contacts and the reference contacts.

Abstract: A sensor device includes a G sensor producing an electric signal in accordance with physical displacement of its sensing portion and a casing mounting this G sensor. A casing chamber is sealed with a potting material so that the G sensor is covered with the potting material. The potting material has the role of surely damping the high-frequency vibration which generally causes resonance. Thus, the G sensor can accurately detect the collision and vibration without being adversely influenced by the resonance.

Abstract: In a soldering method of soldering a lead of an electronic part to a land of a printed circuit board, a heating ray is applied in a condition that a shielding member is arranged on a surface of the printed circuit board around the land. The shielding member is disposed to prevent at least one of a direct ray and an indirect ray from applying to the printed circuit board around the land. Accordingly, the printed circuit board is prevented from burning around the land.

Abstract: A surface-mounted electronic component has an outer lead extending from a package for connection to a circuit pattern on a printed circuit board by using a connecting member. The outer lead has a hole having an opening at least on a connecting member facing side in a portion of the outer lead for connecting the outer lead to the circuit pattern.

Abstract: A method of laser welding two resin members includes the steps of: providing a first and a second resin member each having a joining surface; forming a ridge with a length on the joining surface of one of the first and second resin members, the ridge including a base portion and a tip portion that has smaller width and expansion rate in width than those of the base portion; placing one of the first and second resin members on the other so that the joining surfaces of the first and second resin members face each other with the ridge interposed therebetween; pressing one of the first and second resin members against the other so as to completely crush the tip portion of the ridge; and irradiating the base portion of the ridge with a laser beam while continuously pressing one of the first and second resin members against the other.

Abstract: A resin housing structure for an electrical circuit device to be mounted in a vehicle includes a resin connector equipped with an electrical circuit having a sensor mounted thereon and a connector terminal for externally electrically connecting the electrical circuit and a resin case equipped with a fixing portion to be fixed to the vehicle. The resin connector and the resin case are separately formed and joined to each other and unified into one body.

Abstract: A sensor device includes a G sensor producing an electric signal in accordance with physical displacement of its sensing portion and a casing mounting this G sensor. A casing chamber is sealed with a potting material so that the G sensor is covered with the potting material. The potting material has the role of surely damping the high-frequency vibration which generally causes resonance. Thus, the G sensor can accurately detect the collision and vibration without being adversely influenced by the resonance.