JPS6170763U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a cutaway sectional view of essential parts showing an embodiment of the present invention. 2 is a schematic plan view showing the oxygen sensing element of the embodiment shown in FIG. 1, FIG. 3 is an enlarged view of its base end, FIG. 4 is a right side view of FIG. 3, and FIG. FIG. 4 is a sectional view taken along line V-V in FIG. 3; Figure 6 is an enlarged sectional view of the connection insulator of the embodiment shown in Figure 1 (-
FIGS. 7 and 8 are a cross-sectional view and a cross-sectional view, respectively, of FIG. 6. FIG. 9 is an enlarged front sectional view (10th
FIG. 10 is a plan view thereof, and FIG. 11 is a partially cutaway left side view thereof. 12, 14, and 16 are front cross-sectional views showing the shape of the leaf spring portion of the electrical connection fitting according to other embodiments of the present invention, respectively, and FIG. 13,
FIGS. 15 and 17 are a side view of FIG. 12, a sectional view of FIG. 14, and a sectional view of FIG. 16, respectively. 10: Oxygen detection element, 12: Oxygen detection section, 16
, 18, 20: Lead part, 22: Electrical connection terminal part, 26: Chamfer, 28, 30: Insulator, 32: Protective tube body, 34: Airtight layer, 44: Housing (for oxygen sensor installation), 46 : Gas introduction hole, 48: Rubber plug, 50: Through hole, 58: Connection insulator (housing), 60: Electrical connection fitting, 62: Earth lead, 64, 66: Lead wire, 72: Caulking part, 74
: leaf spring part, 76: lance part, 82: section (stopper piece), 88: projection part.

Claims (1)

[Claims for Utility Model Registration] (1) Measuring the oxygen concentration in a gas to be measured in an oxygen detection section provided at the tip of an elongated plate-shaped oxygen detection element housed in a cylindrical protective tube. In the oxygen sensor, an electrical connection terminal is provided at the proximal end of the oxygen sensing element to form a male contact, and the male contact is fitted into a female connector that incorporates an electrical connection fitting in the housing. , the electrical connection terminal portion of the oxygen sensing element is electrically connected to the electrical connection fitting to which a lead wire is connected, which is disposed through a rubber stopper that watertightly closes the proximal opening of the protective tube body. while connecting the electrical connection fitting of the female connector to the caulking part on the proximal end, the V-shaped or U-shaped spring part on the distal end, and the stopper piece between the caulking part and the spring part. A stopper piece of the lance portion prevents the lance portion from coming off from the housing, the caulking portion connects the lead wire by caulking, and the spring portion connects the oxygen sensing element. An oxygen sensor characterized in that the electrical connection terminal portion is brought into elastic contact. (2) Utility model registration in which the V-shaped or U-shaped spring portion has a protrusion that protrudes toward the electrical connection terminal at the portion where it contacts the electrical connection terminal of the oxygen sensing element. An oxygen sensor according to claim 1. (3) The utility model according to claim 1, wherein the V-shaped or U-shaped spring piece is curved in the width direction at least at a portion where it contacts the electrical connection terminal portion of the oxygen sensing element. oxygen sensor. (4) Any one of claims 1 to 3 of the utility model registration claim, wherein the lead wire is fixed by pressurizing the rubber plug by caulking from the outside of the protective tube body. Oxygen sensor described in Crab. (5) The oxygen sensor according to any one of claims 1 to 4, wherein the end of the oxygen sensing element on the male contact side is chamfered. (6) The oxygen sensor according to any one of claims 1 to 5, wherein the housing of the female connector is made of an inorganic insulating material.