Steel jacket matching structure of gas pressure sensor

Abstract

The invention discloses a steel jacket matching structure of a gas pressure sensor. The steel jacket matching structure comprises a steel jacket which forms an external structure of the gas pressure sensor and takes the shape of a hollow barrel, wherein a space is formed in the steel jacket; an injection molding hole is formed in one end of the steel jacket; a plurality of through holes are formed in a position of the steel jacket, corresponding to the edge of the barrel wall on one side of the injection molding hole. Bumps corresponding to the through holes are arranged on a sensor framework; when the sensor framework is inserted into the steel jacket, the bumps correspondingly enter the through holes and are fixed with the through holes in a matched way; after all injected plastics are solidified, the sensor framework and the steel jacket form an integral structure, on one hand, the bonding force of the steel jacket and the sensor framework as well as the solidified plastics is increased and the steel jacket is difficultly separated from the plastics in a sealing position, and on the other hand, the sensor framework is prevented from moving, so that the stability of a gas pressure sensing element and a circuit chip in the steel jacket is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of sensors, in particular to a steel sleeve matching structure of an air pressure sensor capable of accurately positioning and stably fixing the sensor chip in the steel sleeve. Background technique [0002] The air pressure sensor is a sensor that measures the atmospheric pressure or the intensity of the air pressure in a specific environment. The air pressure sensor in the prior art usually consists of a steel sleeve set on the outside and a pressure sensor element and circuit chip fixedly arranged inside the steel sleeve. The air pressure sensor element and circuit chip are set in the steel sleeve before production. Set the position, and then fill the steel sleeve with plastic through the injection port provided at one end of the steel sleeve, thereby sealing and fixing the air pressure sensor element and the circuit chip inside the steel sleeve. The above-mentioned production method of the air pressure sensor...

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Problems solved by technology

[0003] However, in the prior art, the bonding force between the steel sleeve provided outside the air pressure sensor and the inner structure formed by injection molding is low, and the ability to resist external forces between the two is poor, and they are easy to separate from each other when they are shaken, resulting in the overall structure of the air pressure sensor. damage

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