JPS5822215B2 - Vacuum cleaner dust collection display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collection amount display device for a vacuum cleaner.
The purpose is to make the display accurate and at the same time reduce costs.

Generally, a dust collection amount display device for a vacuum cleaner is provided with a pointer 102 biased toward the suction side via a spring 104 in a transparent cylinder 101, and a pipe 103 placed in the opposite direction of the cylinder 101, as shown in FIG. At least five parts are required, such as connecting the side to the vacuum cleaner body and using a display board 105 to display the operating position of the pointer 102, and each part must have a certain level of precision for accurate operation. was required and was expensive.

In addition, due to the structure, air begins to leak when the pointer starts moving, so if the pointer moves slowly, it will be used in a state where air leaks and performance is low, so the pointer has no choice but to use a fast-acting method. .

Therefore, it is not possible to display the amount of dust collected in an analog manner, and only whether dust has accumulated or not has been displayed.

The present invention eliminates these conventional drawbacks, and embodiments thereof will be described below with reference to FIGS. 1 to 3.

In FIGS. 1 to 3, 1 is a vacuum cleaner body, 2 is an electric blower, 3 is a filter (paper bag), and 4 is a dust collection chamber lid.

5 is a dust collection meter box recessed in the dust collection chamber lid 4, 6 is a transparent window plate that closes the upper opening of this dust collection meter box 5, and 7 is the dust collection chamber lid 4 by pressing the window plate 6. Paste on a fixed display board, 8
9 is a support shaft protruding from inside the dust collection meter box 5, and 9 is a flat pointer with one end 10 rotatably fitted into this support shaft 8, which is an air inflow passage that communicates the inside of the dust collection meter box 5 with the atmosphere. It is divided into a section 11 and a section 11' communicating between the filter 3 in the cleaner body 1 and the suction side of the electric blower 2.

12 is a helical spring that presses the pointer 9 toward the inflow passage portion 11; 13 is a protrusion on which one end of the helical spring 12 is hooked; and 14 is an air intake that communicates the dust collection meter box 5 with the intake side of the vacuum cleaner main body 1. A port 15 is an air intake hole for introducing outside air into the inflow passage 11, and is provided on the display board 7.

Reference numeral 16 denotes a rib wall provided in the dust collection meter box 5, which is located at the tip of the pointer 9 and is formed so as to have approximately the same radius as the rotation radius of the pointer 9. A clearance of the same extent is formed between the needle and the pointer 9.

This rib wall 16 is the part 1 that communicates with the inside of the vacuum cleaner body.
A relief part 16a is provided on the 1' side, so that when the pointer 9 moves beyond the display range, the clearance between the rib wall 16 and the pointer 9 increases, and the atmosphere flows into the intake side through the clearance. It is.

In the above configuration, when the filter 3 of the vacuum cleaner becomes clogged with dust, the negative pressure on the intake side within the vacuum cleaner main body 1 gradually increases, and the pointer 9 moves in accordance with the negative pressure.

That is, in this dust collection amount display device, even when the pointer 9 starts to move, its pressure receiving area hardly changes, and therefore, the pointer 9 gradually moves in accordance with the magnitude of the negative pressure and is displayed in an analog manner.

When the negative pressure on the intake side increases, the pointer 9 moves beyond the display range, and the clearance increases as it faces the relief part 16a of the rib wall 16. Atmospheric air flows in through the clearance, and air for cooling the electric blower is generated. flows in.

As described above, according to the present invention, since the degree of dust accumulation is displayed in an analog manner, accurate display is possible, and it is easy to use and also functions as a safety device for cooling the electric blower, so that it can be used with peace of mind.

In addition, this dust suction amount display device is composed of four parts: a flat pointer, a window plate, a display plate, and an inexpensive spring, which do not require much processing precision, so it reduces costs by reducing the number of parts and processing man-hours. Its effects are similar to that of a dog, such as being able to achieve good health.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a dust collection amount display device for a vacuum cleaner according to an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an exploded perspective view thereof, and Fig. 4 shows a conventional example. FIG. 1...Vacuum cleaner body, 2...Electric blower, 3...Filter, 4...Dust collection chamber lid, 5...Collection Dust meter box, 6...Window plate,
1...Display board, 9...Pointer, 11...
...Part communicating with the atmosphere, 11' ...Part communicating with the inside of the vacuum cleaner body, 12... Spring, 1
6... Wall surface (rib wall).

Claims (1)

[Claims] 1. A dust collection meter box recessed in the vacuum cleaner body or a part of the dust collection chamber, a transparent window plate that closes the upper opening of this dust collection meter box, and a part of the dust collection meter box inside the vacuum cleaner body. It is divided into a part that communicates between the filter and the suction side of the electric blower and a part that communicates with the atmosphere, and a flat pointer with one end rotatably supported, and a part that communicates with the atmosphere. and a spring that biases the pointer, and an escape part that creates a large gap between the tip of the pointer and the tip of the pointer is provided on the side of the arc-shaped wall surface that is close to and opposite to the tip of the pointer and communicates with the vacuum cleaner body. Dust collection amount display device for vacuum cleaners.