JPS5821485Y2 - Liquid spout plug with electrode for liquid level detection - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid spout plug with an electrode for detecting the liquid level, which is equipped with an electrode for detecting the liquid level of a storage battery or the like.

This kind of liquid spout plug with electrode for liquid level detection is used, for example, in the
Some of these are disclosed in Japanese Utility Model Publication No. 3-110422, Japanese Utility Model Application Publication No. 49-122328, and Japanese Utility Model Publication No. 53-30650.

However, the methods shown in Japanese Utility Model Application Publication No. 53-110422 and Japanese Utility Model Application Publication No. 49-122328 have the following drawbacks.

That is, in all of the above, the detection electrode and the lead wire are connected, and the synthetic resin covering is integrally molded by injection molding so that the connection part is included. The portion supported by the mold becomes the exposed lower end portion of the detection electrode and the exposed portion of the flexible lead wire, and the detection electrode cannot be supported by a method such as a cantilever beam.

Therefore, since it is not possible to firmly fix the integrally molded parts (detection electrodes and lead wires), the center position cannot be maintained due to the strong pressure of the synthetic resin during injection molding, and eventually When pressed against the surface of the mold and molded, a portion of the connecting portion, which is most susceptible to bending, is exposed from the injection molded synthetic resin covering.

Here, the purpose of covering the connection part between the detection electrode and the lead wire with a synthetic resin coating is to prevent electrolytes such as H2SO4 from penetrating into the iron part and corroding it. If exposed from the synthetic resin coating,
It has a fatal flaw in that the original purpose cannot be achieved and there is no point in covering it with injection molding.

Furthermore, the device disclosed in Japanese Utility Model Publication No. 53-30650 has a basic drawback in that the connecting portion is exposed, and therefore the connecting portion cannot be protected from corrosion.

The present invention eliminates the above-mentioned drawbacks of the conventional technology. To explain this with reference to the drawings of one embodiment, numeral 1 represents a detection electrode made of a hard material such as a 5b-Pb alloy (Sb6Q~70%). It will be done.

2 and 2' are positioned to fix the lead wires with flanges.

3 is a lower end exposed portion, and 4 is an upper end exposed portion.

Among these, in the upper end exposed portion 4, the portion indicated by the dashed dot line is molded in a long state shown by the dashed dot line during injection molding, and is cut off after molding.

5 is a lead wire which is connected and fixed in a direction substantially perpendicular to the detection electrode 1, and a flexible wire such as JISC3406/AVo, 75f is used.

The core wire 5a of the lead wire 5 is securely fixed to the detection electrode at the core wire fixing part 6 by a method such as winding and soldering.

7 is a detection electrode 1 made by injection molding method.
This is a liquid spout body made of synthetic resin such as polypropylene, which is molded integrally with the spear lead wire 5 .

Reference numeral 8 denotes a liquid port fitting portion having a cylindrical shape and a slight taper, and is inserted into and fitted into a liquid port (not shown) of a corresponding storage battery or the like.

Reference numeral 9 denotes an electrode protection portion which is formed into a deep cylindrical shape, but has a smaller diameter than the diameter of the liquid port fitting portion 8 .

Reference numeral 10 denotes a lead wire protection portion, which is made to protrude as long as possible and has a long span of contact with the lead wire, thereby reliably blocking electrolyte from entering along the lead wire.

Reference numeral 11 denotes a protective cap that covers the upper end of the detection electrode 1 that has been cut off after molding, and is used to prevent short circuits caused by contact of the exposed electrode with a conductor.

The present invention has the above-mentioned configuration, and its functions and effects will be explained below.

The detection electrode 1 has an exposed lower end portion 3 and upper end exposed portion 4 that are exposed to a length that can be sufficiently fixed and supported by the injection molding die, so these portions are firmly fixed by the mold during injection molding. It can be fixedly supported.

Therefore, the detection electrode 1 can be integrally placed in a state where it is always positioned at the center of the liquid port plug body 7.

Next, the core wire 5a of the lead wire is also connected and fixed in the core wire fixing part 6 in a pre-positioned form between the flanges 2 and 2', so that this part, that is, the connecting part is located at the center of the liquid port stopper 7. In this way, the integral ogata will be performed in a state where it is always positioned.

Further, the exposed portion of the lead wire 5 is fixed in the mold, and both the detection electrode 1 and the lead wire 5 are inserted into the liquid port stopper 7 of the so-called injection mold. Since a stable fixing method such as a beam fixed at both ends is always used, it is possible to eliminate the defects of the conventional method.

As mentioned above, the liquid spout plug with an electrode for detecting liquid level according to the present invention exhibits a very remarkable function and effect that reliably eliminates the fatal defects of the conventional ones, and therefore has great practical value.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the liquid spout plug with an electrode for detecting liquid level according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. DESCRIPTION OF SYMBOLS 1...Detection electrode, 3...Bottom exposed part, 4...Top exposed part, 5...Lead wire, 6... Core wire fixing part, 7...liquid port plug body, 11...protective cap.

Claims (1)

[Claims for Utility Model Registration] 1) A lead wire is connected and fixed to a core wire fixing part of a detection electrode in a direction perpendicular to the electrode, including a part of the lead wire and exposing the upper and lower ends of the electrode. A liquid spout plug with a electrode for liquid level detection, which is made by integrally molding the liquid spout body. (2) The liquid spout plug with a liquid level detection electrode according to claim 1, wherein the upper end of the detection electrode is covered with a protective cap.