Abstract: A cage of a cage and rollers includes engaging projecting portions that are provided on outer circumferential surfaces of rim portions, the engaging projecting portions being configured to be elastically deformed when the cage is inserted into a support hole of a rocker arm to thereby allow the cage to be contracted in diameter and to be elastically restored to be brought into engagement with the rocker arm after the cage is inserted in the support hole, to thereby position the cage properly in relation to an axial direction relative to the rocker arm. The cage and rollers can be assembled to the rocker arm while being positioned properly in relation to the axial direction so that the cage and rollers and the rocker arm can be formed into a rocker arm unit, and the cage and rollers can easily be assembled to the rocker arm.

Abstract: A cage of a cage and rollers includes engaging projecting portions that are provided on outer circumferential surfaces of rim portions, the engaging projecting portions being configured to be elastically deformed when the cage is inserted into a support hole of a rocker arm to thereby allow the cage to be contracted in diameter and to be elastically restored to be brought into engagement with the rocker arm after the cage is inserted in the support hole, to thereby position the cage properly in relation to an axial direction relative to the rocker arm. The cage and rollers can be assembled to the rocker arm while being positioned properly in relation to the axial direction so that the cage and rollers and the rocker arm can be formed into a rocker arm unit, and the cage and rollers can easily be assembled to the rocker arm.

Abstract: A glow plug includes: a heater power-conduction shaft that supplies power to a heater; a pressure detection element that is provided in an axial-direction end portion of the heater power-conduction shaft and converts pressure that the heater power-conduction shaft receives in the axial direction into an electrical signal; a first insulation member that surrounds an outer periphery of the pressure detection element with respect to the axis, and allows a signal output terminal of the pressure detection element to protrude toward an outer peripheral side of the axis; a power supply wire that is provided on an outer peripheral side of the first insulation member with respect to the axis, and is connected to the heater power-conduction shaft to supply power to the heater; a signal processing circuit that is provided on an outer peripheral side of the power supply wire with respect to the axis, and is connected to the signal output terminal to process an electrical signal of the pressure detection element; and a se

Abstract: A glow plug includes: a heater power-conduction shaft that supplies power to a heater; a pressure detection element that is provided in an axial-direction end portion of the heater power-conduction shaft and converts pressure that the heater power-conduction shaft receives in the axial direction into an electrical signal; a first insulation member that surrounds an outer periphery of the pressure detection element with respect to the axis, and allows a signal output terminal of the pressure detection element to protrude toward an outer peripheral side of the axis; a power supply wire that is provided on an outer peripheral side of the first insulation member with respect to the axis, and is connected to the heater power-conduction shaft to supply power to the heater; a signal processing circuit that is provided on an outer peripheral side of the power supply wire with respect to the axis, and is connected to the signal output terminal to process an electrical signal of the pressure detection element; and a se

Abstract: [Problem] To provide a pressure sensor element which is not greatly decreased in the resistance due to temperature increase. [Solution] A pressure sensor element which is provided with a piezoelectric element and a high-resistance material film. The piezoelectric element has an upper surface and a lower surface. The high-resistance material film at least partially covers the upper surface and/or the lower surface. The electrical resistance of the high-resistance material film is higher than the electrical resistance of the piezoelectric element.