JPS58143732A - Dust indicator of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust indicator that displays the amount of dust collected in a vacuum cleaner.

There is a dust indicator that shows the amount of uncollected dust, and a safety valve that allows a small amount of air to flow to prevent the vacuum cleaner from operating in closed mode and becoming extremely hot when a large amount of dust has accumulated, causing thermal deformation of the body or burnout of the electric blower. There is a product that doubles as a safety valve (protector), but since it doubles as a safety valve, interlocking is required for it to work as a valve, and if a small amount of air gradually leaks, it will be used at a low vacuum during use, causing problems. It is. For this reason, conventional indicators that function as both an indicator and a protector are fast-acting, and although they can indicate whether dust has accumulated, they cannot display the extent to which the dust has accumulated.

The present invention aims to eliminate these conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In Figure 1, 1 has casters for movement on the front.

The lower body 3, which has rollers 2 at the rear, form a box together with the lower body 1, and an electric blower (
4 is a lid that forms a dust box together with the lower body 1, and is detachably attached to the lower body 1. 5 is a handle that forms a handle for transporting the vacuum cleaner together with a part of the lower body 1, 6 is a brake pedal for the cord reel, 7 is a switch pedal for turning the power on and off, 8 is a hose, an extension pipe, and a floor. The intake port 09 to which a nozzle or the like is connected is part of an indicator for displaying the amount of collected dust.

Next, the structure of the indicator part 9 will be explained with reference to FIGS. 2 and 3. 1o is a box fixed to or integrally formed with the lid 4; 11 is a transparent plate forming the lid of the box 1o;
12 is an indicator panel that makes the position of the pointer 13 clear. The pointer 13 is slidably movable inside a frame formed by a partition plate 14δπ14a having a central tail hole 14a, an indicator window 11, and a box body 10, and has a small diameter portion 1 having approximately the same diameter as the hole 14a.
3b and a body part 13a having a cross-sectional area 1.5 to 2.5 times the cross-sectional area of the body part 13b, and a body part 13a and a body part 13a having a cross-sectional area 1.5 to 2.5 times that of the body part 3b. One side of the box 1o has a perfect circular cross section, and the other side has a polygonal cross section.

15 is a spring that urges the pointer 13 toward the communication part 10a that communicates with the atmosphere through the hole 11a of the indicator window 11 and the hole 12a of the indicator panel 12; 1ob is a spring that is attached to the box body 1o to communicate with the intake side of the electric blower; This is a hole provided.

In the above configuration, as shown in FIG. 4, when part of the filter gradually accumulates dust and becomes clogged, the pressure on the intake side of the electric blower decreases, and the pointer 13 changes from the state (a) to the state (b). moves gradually. The pointer 13 moves by an amount corresponding to the amount of clogging of part of the filter and indicates the amount of accumulated dust.

As more dust particles come out and the sealing state is approached, (bl
It moves to state (C). However, the pointer 13 is the brocade part 13.
Whereas static pressure was applied at point b, the pressure is applied at the section in charge of the cross-sectional area of body section 13a, so it moves smoothly without stopping in state lb). Therefore, air leaks in the direction shown by the arrow in the figure (c), which prevents the air from becoming completely sealed due to dust, preventing thermal deformation of the electric blower due to overheating, and also prevents burnout of the electric blower.

As described above, the present invention has both an indicator mechanism and a safety mechanism, and is a mechanism that can indicate changes in the amount of dust, instead of a pilot (digital) system that indicates whether or not dust has accumulated as in the past. It is possible to express this.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a vacuum cleaner according to an embodiment of the present invention, Fig. 2 is a vertical sectional view of a part of the indicator, Fig. 3 is an exploded perspective view of a part of the indicator, Fig. 4
(bl, (C1 is an explanatory diagram of the operation of the same indicator pointer. Department,
13b Kawayama narrow path section, 14... Shikiri board, 14a
...hole, 15...spring.

Claims (1)

[Claims] A cylindrical member with one end communicating with the atmosphere and the other end communicating between a part of the filter and the suction side of the electric blower, and at least a part of which is transparent, and a gap for air circulation inside the cylindrical member. A movable pointer is provided at 4, a spring urges the pointer toward the atmosphere, and the inside of the cylindrical member on the atmosphere side than the pointer is closed off, with a hole partially protruding toward one side of the body. Configured vacuum cleaner dust indicator.