STRUCTURAL IMPROVEMENT OF LIQUID LEVEL SENSOR

A structural improvement of a liquid level sensor includes a pair of terminals, a body, and a reed switch. Each of the terminals has a clamping end, a guiding and connecting end, an extending portion, and a welding end. The body covers outer sides of extending portions. The pair of terminals are disposed at an interval inside the body. The body has a notch and a counterbore. The reed switch is clamped on the clamping ends and located at the notch. The clamping ends are respectively disposed on two sides of the notch and protrude from the body. The welding ends are exposed in the counterbore. The guiding and connecting ends extend outward from a side of the body. In this way, positioning of a reed switch is more accurate, production efficiency can be improved, and manufacturing and assembly costs can be lowered.

BACKGROUND

Technical Field

The present invention relates to a structural improvement of a liquid level sensor and in particular, to a liquid level sensor that makes positioning of a reed switch more accurate and that can improve production efficiency and lower manufacturing and assembly costs.

Related Art

Generally, for use in electronic detection on a liquid level, for example, measurement on a water level or a fuel level, mainly, a reed switch is used as a main detection component to assembly a liquid level sensor, and a current liquid level sensor is shown inFIG. 1andFIG. 2.

A current liquid level sensor A consists of a pair of terminals B, a body C, a circuit board D, and a reed switch E. When the liquid level sensor A is assembled, the pair of terminals B are welded to the circuit board D, then the circuit board D and the terminals B are assembled on the body C, and finally, the reed switch E is assembled on the circuit board D.

As described above, the current liquid level sensor A is constituted by many pieces and during assembly, it is easy to cause an assembly tolerance, thereby affecting accuracy of the liquid level sensor A. In addition, assembly of the reed switch E and the circuit board D is directly placing guiding and connecting rods E1located on two sides of the reed switch E on corresponding welding spots D1on the circuit board D and then welding the reed switch E to the circuit board D. Such an assembly manner requires using a special fixture to perform positioning, and otherwise, it is easy to cause displacement of the reed switch E.

Further, the terminals B also need to be welded on the circuit board D and then be assembled on the body C, and it is easy to generate a tolerance of assembly between the terminals B and the body C. In this way, production efficiency of the liquid level sensor A is low, and because of the components, there are many assembly procedures, which bring a lot of costs.

In view of the above, to make an improvement and solve the foregoing disadvantages, the present inventor devotes oneself to researches, applies theories, and finally proposes a liquid level sensor that is properly designed and that effectively alleviates the foregoing disadvantages.

SUMMARY

A main objective of the present invention is to provide a structural improvement of a liquid level sensor and in particular, to provide a liquid level sensor that makes positioning of a reed switch more accurate and that can improve production efficiency and lower manufacturing and assembly costs.

To achieve the foregoing objective, the present invention provides a structural improvement of a liquid level sensor including a pair of terminals, a body, and a reed switch. Each of the terminals has a clamping end, a guiding and connecting end, an extending portion, and a welding end. The body covers outer sides of extending portions of the pair of terminals so that the pair of terminals are disposed at an interval inside the body. A side of the body has a notch and the body has a counterbore. The reed switch is clamped on the clamping ends of the pair of terminals and located at the notch of the body.

The clamping ends of the pair of terminals are respectively disposed on two sides of the notch of the body and protrude from the body; the welding ends of the pair of terminals are exposed in the counterbore of the body. The guiding and connecting ends of the pair of terminals extend outward from a side of the body.

In this way, positioning of a reed switch is more accurate, production efficiency can be improved, and manufacturing and assembly costs can be lowered.

DETAILED DESCRIPTION

To further disclose features and technical content of the present invention, reference may be made to detailed descriptions on and accompanying drawings of the present invention. However, the accompanying drawings are merely provided for reference and description, but not intended to limit the present invention.

As shown inFIG. 3toFIG. 5, the present invention provides a structural improvement of a liquid level sensor, where the liquid level sensor10includes a pair of terminals20, a body30, and a reed switch40.

The pair of terminals20include a first terminal20′ and a second terminal20″. The first terminal20′ and the second terminal20″ are electrically separated from each other. Each of the terminals20has a clamping end21, a guiding and connecting end22, a extending portion23that connects the clamping end21and the guiding and connecting end22, and a welding end24that extends outward from a side of the extending portion23. The welding ends on the first terminal20′ and the second terminal20″ respectively extend toward each other. The clamping end21and guiding and connecting end22of each of the terminals20are formed by extending in directions opposite to each other. The clamping end21of each of the terminals20has a clamping groove25.

A body30has a body portion31and a positioning portion32, the positioning portion32extends outward from a side of the body portion30, there is a segment difference between the body portion31and the positioning portion32, and the positioning portion32has a notch33and a counterbore34.

When the present invention is carried out, the pair of terminals20are formed of a metal tape feeder in a punching manner, then the punched metal tape feeder is placed into a mold, and subsequently, the body30is formed on the pair of terminals20in an injection molding manner, so as to integrally form the pair of terminals20and the body30, thereby preventing an assembly tolerance between the terminal20and body30.

When the body30is formed on the pair of terminals20in an injection molding manner, the body30covers outer sides of the extending portions23of the pair of terminals20, the clamping ends21of the pair of terminals20are located on two sides of the notch33on the positioning portion32of the body30, and the clamping ends21and the extension of the notch33are disposed perpendicular to each other and protrude out of the positioning portions32. In addition, the welding ends24of the pair of terminals20are exposed in a protruding manner inside the counterbore34on the positioning portion32and can be configured to dispose an electronic piece (which is not represented by a reference sign, for example, a resistor). The guiding and connecting ends22of the pair of terminals20extend outward in a direction opposite to the positioning portions32from the body portion31located on the body30to extend out of an outer side of the body portion31.

Each of the two sides of the reed switch40has a guiding and connecting rod41, the reed switch40is clamped inside the clamping grooves25on the clamping ends21of the pair of terminals20by means of the guiding and connecting rods41, so that the reed switch40is held between the clamping ends21of the pair of terminals20and is located at the position of the notch33of the body30.

In this way, in the liquid level sensor10of the present invention, the pair of terminals20thereof and the body30thereof are integrally formed. Therefore, assembly personnel only need to clamp the reed switch40between the clamping ends21of the pair of terminals20and then perform welding, so as to complete assembly of the liquid level sensor10of the present invention.

As compared with the conventional technology, the liquid level sensor10of the present invention has fewer components and has characteristics such as convenient assembly, low costs, and a small assembly tolerance.

While the present invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the present invention needs not be limited to the disclosed embodiments. For anyone skilled in the art, various modifications and improvements within the spirit of the present invention are covered under the scope of the instant disclosure. The covered scope of the present invention is based on the appended claims.