MEASURING PLUG AND METHOD FOR ASSEMBLING A MEASURING PLUG

摘要

Disclosed is a pressure-measuring plug for a combustion engine. An interconnection structure in the plug body electrically couples by means of a flexible printed circuit board (PCB) an electrical sensing element at one end of the plug body to connector terminals of the plug at the other end of the plug body. An elongated support structure fixates a part of the flexible PCB in the plug body to enable the flexible PCB to withstand automotive conditions and to facilitate during assembly to put the flexible PCB through the hollow plug body.

主权项

1. A measuring plug comprising:
a hollow plug body comprising a proximal end, a distal end and a plug body axis; a sensing structure comprising at least one electrical sensing element, the sensing structure located at the proximal end of the hollow plug body; and connector terminals arranged in a housing which is attached to the distal end of the hollow plug body, the connector terminals electrically coupled by electronic circuitry and bonding wires to the at least one electrical sensing element; the measuring plug further comprising an interconnection structure providing an electrical connection through the hollow plug body; the interconnection structure comprising a flexible printed circuit board (PCB) with first contact areas at a proximal end part of the flexible PCB and second contact areas at a distal end part of the flexible PCB; the first contact areas electrically coupled to the electrical sensing element by bonding wires, the proximal end part of the flexible PCB positioned in the hollow plug body in a plane which is perpendicular to the plug body axis; the interconnection structure further comprising an elongated support structure configured to fixate a part of the flexible PCB between the proximal end and distal end of the flexible PCB in the hollow plug body.