JPH0566526U - Liquid level sensor - Google Patents

Abstract

(57) [Summary] [Object] To provide a liquid level sensor that does not need to make a hole in the bottom of a container, does not require liquid leakage countermeasures, and can freely change the sensor ON position. [Structure] A cylindrical portion 11 protruding vertically is integrally formed inside a container 10 for containing a liquid, and a sensor main body 14 provided with a reed switch 13 is inserted into the cylindrical portion 11 and a cylindrical portion is formed. It is configured by fitting a float 17 having a magnet 16 that moves up and down depending on the liquid level H to the nozzle 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to, for example, a liquid level sensor for detecting a liquid level of a washer liquid of a windshield of an automobile.

[0002]

[Prior Art]

 Many automobiles in recent years are equipped with a liquid level sensor that detects the liquid level of the washer tank. This liquid level sensor is constructed as shown in FIG. In the figure, 1 is a container for containing washer fluid and the like, and 2 is a sensor main body provided inside the container 1 so as to project. The sensor body 2 has a cylindrical shape, and a reed switch as a magnetically responsive element, which is not shown, is built in at the tip of the upper portion.

A ring-shaped float 3 made of a lightweight resin or the like is loosely fitted to the sensor body 2 so as to move vertically with respect to the liquid level H. The float 3 has a built-in magnet 4, and when the float 3 drops below a set liquid level H (for example, 0.25L ± 0.1L for a washer liquid), the reed switch of the sensor body 2 Is turned on, and this output signal warns that the remaining amount of liquid is low with a warning lamp.

[0004]

[Problems to be solved by the device]

 By the way, in the liquid level sensor described above, the sensor main body 2 is provided so as to project inside the container 1, and the container 1 and the sensor body 2 are integrated. Therefore, the hole 5 must be formed in the bottom of the container 1 for wiring the sensor body 2 having the reed switch built therein. Further, in order to prevent liquid leakage from the hole 5, it is necessary to fit the liquid leakage prevention grommet 6 and then attach the sensor body 2. Furthermore, since the sensor main body 2 is attached and fixed to the bottom of the container 1, once the sensor ON position is set, it cannot be easily changed.

The present invention has been made in view of the above circumstances, and its purpose is to eliminate the need to make a hole in the bottom of the container, to prevent liquid leakage, and to freely change the sensor ON position. Another object of the present invention is to provide a liquid level sensor that can be used.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the liquid level sensor of the present invention is a sensor in which a cylindrical portion is integrally formed in a vertical direction inside a container for containing a liquid, and a magnetically responsive element is provided in this cylindrical portion. It consists of inserting the main body and fitting a float with a magnet that moves up and down depending on the liquid level to the tubular part.

[0007]

[Action]

 According to the liquid level sensor having the above-mentioned configuration, even if the liquid is contained in the container, it is not necessary to make a hole in the bottom portion, and there is no fear of water leakage. In addition, by changing the seat height of the screw stop of the sensor body, the ON position of the liquid level sensor can be freely changed for each tank.

[0008]

【Example】

 An embodiment of the liquid level sensor of the present invention will be described below with reference to FIGS. In the figure, 10 is a container for containing a liquid, such as a washer tank, and a cylindrical portion 11 protruding vertically is integrally formed in the inner portion of the container 10, and the cylindrical portion 11 is opened to the outside of the container 10. An opening hole 12 is provided.

A sensor main body 14 provided with a reed switch 13 as a magnetically responsive element is inserted into the opening hole 12. The sensor body 14 is composed of a flange portion 14a and a round bar-shaped tip portion 14b in which the reed switch 13 is built. The flange portion 14a is fixed to the opening hole 12 with a screw 15.

On the other hand, an annular float 17 having a magnet 16 is provided in a loosely fitted state on the convex portion 11 inside the container 10. The float 17 is configured to move up and down according to the liquid level H.

An air vent hole 18 is provided in the upper part of the container 10, and a liquid discharge port 19 is provided in the bottom part of the container 10. The container 10 is composed of an upper container 10a and a lower container 10b, and is constructed by welding the upper and lower containers 10a and 10b with the float 17 fitted in the tubular portion 11.

By using the liquid level sensor configured as described above, even if the liquid is stored in the container 10, it is not necessary to make a hole in the bottom of the container 10 for attaching the sensor body 14, No more worrying about leaks. Further, the height of the reed switch 13 can be arbitrarily changed by changing the height of the mounting base of the flange portion 14a of the sensor body 14, and the ON position of the liquid level sensor can be freely changed. become able to. Further, the liquid level sensor is not limited to the washer tank container 10 and can be used for various kinds of containers.

[0013]

[Effect of the device]

 Since the present invention is configured as described above, there is no need to make a hole in the container, no liquid leakage countermeasure is required, and the ON position of the liquid level sensor can be freely changed. It is possible to provide a liquid level sensor that can be shared by various containers.

[Brief description of drawings]

FIG. 1 is a sectional view showing a liquid level sensor according to an embodiment of the present invention.

FIG. 2 is a perspective view of a liquid level sensor according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a conventional liquid level sensor.

[Explanation of symbols]

10 ... Container, 11 ... Cylindrical body, 12 ... Open hole, 13 ... Reed switch, 14 ... Sensor main body, 16 ... Magnet, 17 ... Float.

Claims (1)

[Scope of utility model registration request] 1. A container for containing a liquid is integrally formed with a cylindrical portion protruding in a vertical direction, and a sensor main body provided with a magnetically responsive element is inserted into the cylindrical portion, and the liquid is inserted into the cylindrical portion. A liquid level sensor comprising a float having a magnet that moves up and down according to a surface level, and a float.