JPS6120290B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for notifying the amount of dust sucked into a vacuum cleaner.

In conventional vacuum cleaners, when the ventilation resistance increases due to clogging of the main filter, another ventilation hole is opened to notify the amount of dust being sucked in. If dust containing a lot of fine dust is sucked in, even though the amount of coarse dust is small, a large amount of fine dust adheres to the main filter, increasing ventilation resistance, which may activate the alarm system and prevent it from being used. There were many cases where garbage was thrown away even when it was possible.

In view of the above-mentioned drawbacks of the conventional apparatus, the present invention is configured so that the notification device operates more accurately depending on the amount of dust sucked in. An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the main body of the vacuum cleaner (hereinafter referred to as the main body), 2 is an electric blower built into the main body 1, and 3
4 is a rear wheel, 4 is a front wheel, and 5 is a dust box connected to the main body 1, which has a suction port 5' to which a hose (not shown) is connected. 6 is a handle for carrying the dust box 5, 7
Reference numeral 8 indicates a buckle for attaching and detaching the main filter 1 and the dust box 5. Reference numeral 8 indicates a support frame that supports the tight rubber 9 that airtightly connects the dust storage box 5 and the main body 1. It includes a bearing 8' that supports a rotating shaft 11 formed integrally with the front frame 10', and a dust removing body 13 that repels one end of the diaphragm 12 inserted into the wall of the main filter 10.

8'' is a rib for attaching the limit switch 23, which is formed in the support frame 8. 8a is a vent hole formed in the support frame 8, and 14 is located at the other end of the bearing 8'. Supported large pulley, 1
Reference numeral 4' denotes a cylindrical portion formed on the pulley 14, and a protrusion 14a is formed at the tip, and this protrusion 14a interlocks with the rotating shaft 11 of the main filter 10, and allows the main filter 10 to move in the thrust direction. There is. 15 is a small pulley that engages with the large pulley 14, and is provided with a pawl portion 15' that engages with the clutch plate 16 on the main body 1 side. 17 is an interlocking shaft that transmits the rotation of a cord reel (not shown), and 18 is a dust tight packing, which is fitted onto a rib 8b protruding from the support frame 8, and which comes into contact with a rib 10a protruding from the main filter 10 to close the main filter. Airtightness can be maintained even when 10 moves in the thrust direction. 19 is a substantially disc-shaped prefilter that separates coarse dust from fine dust. A packing 21 that is rotatably tight is fitted onto the outer periphery of the prefilter 19 and the inner periphery of the prefilter frame 20. The prefilter 19 rotates together with the main filter 10, and
It can move integrally with the main filter 10 in the thrust direction, and is biased toward the dust collection section by a spring 22. A small limit switch 23 is fixed to a rib 8'' formed on the support frame 8, and is in contact with one end of the frame 10'' of the main filter 10 so that when the switch 23 is turned off, the electric blower of the main body stops. There is.

In the above configuration, when the cord is pulled out, the rotation of the cord reel is transmitted to the large pulley 14 through the interlocking shaft 17, and the cylindrical portion 14a and the rotating shaft 11
In conjunction with this, the main filter 10 rotates, and at the same time, the pre-filter 19 also rotates.

As a result, as the prefilter 19 rotates, the dust that has adhered to the prefilter 19 and is increasing the ventilation resistance of the prefilter 19 rubs against other dust that has been sucked in and is removed. The surface is clean and suction can always be performed with high efficiency. Furthermore, as the amount of dust increases, a lot of dust adheres to the pre-filter 19 as shown in Fig. 2, and the wind pressure of this adhered debris causes the main filter 10 and the pre-filter 19 to move in the thrust direction. Frame 1 of main filter 10
0'' also moves in the thrust direction, the limit switch 23 operates and the electric blower stops.In this way, unlike conventional suction dust amount notification devices, the main filter 10 is biased toward the dust collection section. spring 2
If the elastic force in step 2 is set to an appropriate amount, it will work when a certain amount of coarse dust is captured in the dust collecting section, resulting in a reliable and safe dust amount notification device.

Furthermore, as shown in this embodiment, in the case of a rotary prefilter mechanism, as the amount of dust increases, the frictional resistance between the rotary prefilter and the dust increases, so the cord pulling force becomes heavier, and the dust that is sucked increases. Depending on the type of filter, there was a problem of the rotating shaft being damaged, but by providing the device for notifying the amount of sucked dust of the present invention, the pre-filter 19 is biased toward the dust collection section by the spring 22, so Prefilter 1
The elasticity of the spring 22 softens the frictional resistance between the cord 9 and dust, thereby providing the advantage of preventing an increase in cord pulling force and damage to the rotating shaft.

As described above, according to the present invention, it is possible to notify the amount of suctioned dust reliably and efficiently, and for those with a rotating pre-filter mechanism, it is possible to prevent an increase in the cord pulling force and damage to the rotating shaft, and it is possible to prevent the industrial The value is extremely great.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of a main part of a vacuum cleaner showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main part. 2...Electric blower, 5'...Suction port, 10...
Main filter, 23... switch.

Claims (1)

[Claims] 1. A pre-filter and a main filter integrated with the pre-filter are rotatably and axially displaceably disposed between the suction port and the electric blower, biased in the direction of the suction port by a spring, and the main filter is A vacuum cleaner equipped with a switch for controlling the electric blower to start and stop, corresponding to the electric blower side.