JPS60203226A - 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 Field of the Invention The present invention relates to a vacuum cleaner equipped with a dust indicator that displays the amount of dust collected by the vacuum cleaner.

Conventional configuration and its problems In conventional vacuum cleaner dust indicators, when a certain air volume is reached, the pointer, which showed no signs of operating until just before that point, suddenly starts operating from one end of the indicator pipe to the other. Therefore, it was difficult to determine how much dust had been collected during that period. Particularly with vacuum cleaners that collect dust in paper bags, if the paper bag becomes full of dust during cleaning and the pointer activates, it is time-consuming to go and buy a new paper bag. There was a strong demand for a dust indicator that would let the user know in advance that the amount of dust collection is about to reach its capacity.

Furthermore, since the pointer moves instantaneously, there is also the problem that it is difficult to notice that the pointer has moved.

OBJECTS OF THE INVENTION The present invention solves these conventional problems, makes it easier to check the amount of collected dust using a dust indicator, and improves usability.

Structure of the Invention The vacuum cleaner of the present invention includes a spring that urges a pointer slidably inserted into a female indicator pipe that displays the amount of collected dust toward the outside air, and a free length that is shorter than that of the spring. By attaching springs with different outer diameters to the pointer, when the pointer moves to a predetermined position, a new load is applied by another spring, so the pointer can be moved instantaneously from one end of the indicator pipe to the other. Since the amount of dust collected can be precisely notified, the information provided by the dust indicator can be increased and made more reliable, and the usability can be improved.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figures 1 to 6, 1 is a vacuum cleaner main body (hereinafter referred to as the main body) that has a built-in electric blower 2 for suction and can be divided into upper and lower parts, 3 is a paper bag that can be thrown away together with a filter device 4 and collected dust. 5, is a removable dust collection box held by the main body 1, and is arranged on the suction side of the electric blower 2. A paper bag outlet is provided on the front surface of the dust collection box 3, and a paper bag support plate 6 is rotatably supported at the lower end of the paper bag outlet. Reference numeral 7 denotes a front cover having a hose insertion port 8 and a handle 9, and a front cover contact plate 11 having a lid rubber 10 attached to the outer periphery to provide air tightness between the paper bag outlet and the paper bag outlet.
is rotatably supported on the lower front end of the main body 1 to open and close the paper bag outlet, and is locked with a buckle 12. Reference numeral 13 denotes a bulkhead that is integrally provided approximately at the center of the main body 1 and has a ventilation hole 14 that separates the electric blower 2 and the dust collection box 3. The electric blower 2 and the dust collection box 3 are connected to the front support rubber 16 and the backing. 16, and are in airtight contact with each other. 17 is a front wheel, 18 is a rear wheel protruding toward the rear of the main body 1, and 19 is a rest.

20 is integrally formed from the upper part of the main body 1, and an electric blower 2
21 is an elbow joined to the upper opening of the pipe 20, and 22 is a transparent indicator pipe 22' that communicates with this elbow 21. Inside the transparent indicator pipe 22', there is a slider that is displaced by the pressure difference between the outside pressure and the intake pressure. This is a dust indicator with a movable pointer 23 inside. A ring 2 having an outside air inflow hole 24 is provided on the outside air side of the indicator pipe 22'.
6 is installed. Further, a spring 26 that biases the pointer 23 in the direction of contacting the outside air inflow hole 24 is interposed between the elbow 21 and the pointer 23, and the spring 26 allows the pointer 23 to operate and slide over a shorter distance. A small spring 27 having a free length is provided on the pointer 23. Reference numeral 28 is a display window provided at the top of the main body 1 to display the amount of dust collected in the paper bag 6.

The opening at the other end of the pipe 20 is disposed near the electric blower 2 and communicates with the suction side of the electric blower 2 via a communication pipe 29. This communication tube 29 is formed of a soft material and is inserted into a hole provided in a divided portion of the partition wall 13 located inside the front support rubber 16.

In the above configuration, the dust indicator 22 can display the amount of collected dust and also indicate the state where a large amount of dust has accumulated in the paper bag 5 and the paper bag 6 has become clogged with fine dust. If the paper bag 6 is clogged and a load is applied to the electric blower 2 and the electric blower 2 is heated, the main body 1 will be deformed, so it is necessary to flow cooling air through the electric blower 2. .

When the vacuum cleaner sucks in dust and the vacuum pressure on the suction side of the electric blower 2 increases, the pointer 23 moves against the load of the spring 26, and when it reaches a predetermined position, the small spring 27 moves as shown in FIG. One end of the elbow 21 contacts the elbow 21, and its load is applied to the pointer 23. As shown in FIG. 7, until point a, where one end of the small spring 27 provided on the pointer 23 comes into contact with the elbow 21, the load applied to the pointer 23 is due to the spring 26, as in the conventional dust indicator. However, from point a to point 5, where the pointer 23 can operate, the load from the small spring 27 is further added, so it becomes like a solid line, which is a larger load than the conventional dust indicator shown by the broken line. can be added to the guideline 23. Therefore, the pointer 23 that moves from one end to the other in the indicator pipe 22' can be temporarily stopped near point a, and this point a can be freely set by changing the free length of the small spring 27. I can do it.

Therefore, the free lengths of the spring 26 and the small spring 27 are set so that the pointer 23 will temporarily stop at a predetermined position when the set air volume or dust collection volume is reached before the paper bag 6 becomes completely full of dust. In particular, it is possible to inform the user that the paper bag 6 will soon be full of dust even when it has sufficient suction power for cleaning, and the user can prepare the paper bag 5 in advance. It is something that can be kept.

In general, the relationship between the air volume of a vacuum cleaner and the amount of dust collected is as shown in Figure 8.When the vacuum cleaner starts sucking in dust, the air volume decreases rapidly, but when the amount of dust collected reaches a certain point, point C. The air volume decreases gradually, and when it reaches a certain point d, the air volume begins to decrease rapidly again, and after the dust indicator 22 is activated, the air volume becomes almost zero. Therefore, as the pointer 23 is displaced, the load applied to the pointer 23 increases at a constant rate. The indicator pipe 22' was only shown to indicate that it was full of dust, but the spring 26 was compressed to prevent the pointer 23 from moving much until the amount of collected dust reached the 0 point in Figure 8. After insertion, the spring constant of the spring 26 may be set small so that changes in the air volume can be detected while the air volume does not change much from point 0 to point 6. Furthermore, by setting the spring constant and free length of the small spring 27 in response to the sudden decrease in air volume after point d, the pointer is moved at a constant rate as the amount of dust collected increases, and the paper bag 5 is removed all at once. Until this happens, the user can be informed of the amount of dust collected in the paper bag 5.

In the above embodiment, dust is collected in the paper bag 6 and one small spring 27 is used to constitute the dust indicator 22, but it can also be used in a type of vacuum cleaner that does not use the paper bag 5. In addition, a plurality of small springs 27 may be used.

Effects of the Invention As is clear from the above embodiments, the vacuum cleaner of the present invention has a dust indicator formed by a plurality of springs having different free lengths and outer diameters. By temporarily stopping at a predetermined position, it is possible to notify the user in advance that it is time to cross the paper bags in the dust collection chamber or to throw away the garbage in the dust collection chamber, and By setting the free length and spring constant of the spring appropriately, if the pointer moves gradually at a constant rate as the amount of collected dust increases, the amount of collected dust can be clearly seen from the position of the pointer. This makes it possible to improve usability.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a vacuum cleaner showing an embodiment of the present invention;
Figure 2 is a sectional view of the same, and Figure 3 is the front cover. Front view of the main unit with the dust collection box and backing removed,
Figure 4 is a sectional view showing the installation state of the communication pipe, Figure 5 is an exploded view of the dust indicator, Figure 6 is a diagram showing the operating status of the dust indicator, and Figure 7 is the load applied to the dust indicator pointer and the pointer. FIG. 8 is a graph showing the relationship between the air volume and the amount of dust collected in a general vacuum cleaner. 2: Electric blower, 22: Old dust indicator, 23: Pointer, 26: Old spring,
27. Old... Small spring. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Fig. 3 Fig. 481 Fig. 5 Fig. 6 Fig. 7 i B31〒115 Shin 1 Ii Child 8 Fig. Chestnut storage amount

Claims (1)

[Scope of Claims] A pointer slidably inserted into an indicator pipe that communicates one end with the outside air side and the other end with the intake side of an electric blower for suction to form a ventilation path for outside air. This vacuum cleaner is equipped with a dust indicator equipped with a spring that urges this pointer toward the outside air side, and a spring that has a shorter free length and a different outer diameter than this spring.