JPH0417975Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a liquid level display device used, for example, in a water tank of a humidifier, and the liquid level is checked by reflecting light from a light source onto a float. The present invention provides a liquid level display device that is easy to display.

<Prior Art> FIG. 4 is a sectional view of a water supply tank of a conventional humidifier.

In FIG. 4, 1 is a tank, and 2 is a main body that supports this tank 1.

The tank 1 is made of transparent material,
The water surface is now visible from the outside.

The main body 2 is made of a non-transparent material, has a light source 3 such as a light bulb inside, and has a window 4 on the top surface for irradiating light from the light source 3 into the tank 1.

In such a conventional device, when the light from the light source 3 is irradiated into the tank 1 through the window 4, this light is applied to a curved surface A formed by adhesive force at the contact area between the water surface and the inside of the tank 1. This reflected light passes through the tank 1, allowing the water surface to be visually observed.

Furthermore, as shown in the front view of FIG. 5 and the sectional view of FIG. 6, there is also a device in which a float 7 floating in the liquid 6 is provided near the display window 5.

<Problems to be solved by the invention> However, in such conventional devices, the contact angle θ between the liquid surface and the tank 1 varies depending on the material of the tank 1, the condition of the inner surface, and the type and condition of the liquid. Also, since the height of liquid adhesion to the inner surface of tank 1 is small,
There was a problem that the light reflecting area was small and the liquid surface was difficult to see.

Further, in the float type, there were problems in that unless the float 7 was very large, it was difficult to check the liquid level from a distance, and the position of the float 7 was difficult to determine in the dark.

The present invention was developed to solve these problems, and the lower part of the float is formed into a substantially conical shape with a downwardly pointed point, or the inside is bored into a conical shape with an upwardly pointed point, so that light from a lower light source can be emitted from the lower part of the float. It is an object of the present invention to provide a liquid level display device in which a float, that is, a liquid level, can be easily confirmed even in a dark place or from a distance by irradiating light horizontally by reflection or prism action.

<Means for Solving the Problems> In order to achieve the above object, this invention uses a float-type liquid level display device for a liquid container to emit light from a light source provided in a main body that supports the liquid container from below. It is characterized by floating a float in the vicinity of the liquid level indicator, which has a substantially conical shape with a downwardly pointed lower part, or a conical shape with an upwardly pointed inside, which illuminates horizontally by reflection or prismatic action. shall be.

<Function> In the above configuration, the float suspended near the liquid level display reflects the light from the light source in the horizontal direction and irradiates it toward the liquid level display, so the float can be seen even in the dark or from a distance. In other words, the liquid level can be clearly seen.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the liquid level display device of the present invention, and FIG. 2 is a sectional view thereof.

In FIGS. 1 and 2, 8 is a water tank used for example in a humidifier, and a display window 9 made of a translucent material is provided on the front side of the tank 8.

Reference numeral 10 denotes a float placed near the display window 9, which floats on water 11 inside the tank.The float 10 has a conical lower part, and at least the conical part is made of a material that easily reflects light. The guide plate 12
It is designed to move up and down along the display window 9.

A light source 13 is provided below the float 10 in the main body 14, and irradiates the float 10 with light through a translucent window 15 disposed above the light source 13.

Therefore, in the display device described above, since light is emitted from below the float 10, the light from the light source 13 is reflected in the horizontal direction on the lower surface of the float 10, and a part of it is reflected in the display window. 9, the position of this float 10 is illuminated outwards, and even if the surroundings are somewhat dark, the float 1
The 0 position will pop up.

FIG. 3 is a sectional view of main parts showing another embodiment of the liquid level display device of the present invention.

In FIG. 3, reference numeral 10' denotes a float, which is made of a transparent material and has a conical recess 16 formed on its lower surface.

When such a float 10' is irradiated with light from the downward light source 13, the light is separated by a prism-shaped optical path, and this reflected light is irradiated to the outside through the display window 9, making this float 10' stand out. be able to.

<Effects of the invention> Since the liquid level display device of the invention is constructed as described above, the light from the light source is irradiated onto the display section by reflection of the float or by prismatic action, so that it can be viewed from a dark place or from a distance. However, you can clearly check the float, that is, the liquid level.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the liquid level display device of the present invention, Fig. 2 is a sectional view thereof, and Fig. 3 is a sectional view of essential parts showing another embodiment of the liquid level display device of the present invention. , Figure 4 is a sectional view of the water tank of a conventional humidifier, and Figure 5 is a sectional view of the water tank of a conventional humidifier.
The figure is a front view of another conventional liquid level display device, and FIG. 6 is a sectional view of the same. 8... Tank, 9... Display window, 10, 10'...
...Float, 13...Light source.

Claims (1)

[Claims for Utility Model Registration] In a float-type liquid level display device for a liquid container, light from a light source provided in a main body that supports the liquid container from below is irradiated in a horizontal direction by reflection or prism action. A liquid level display device characterized in that a float having a substantially conical shape with a downwardly pointed bottom or a conical shape with an upwardly pointed inside is suspended in the vicinity of a liquid level display section.