JPH04122231A - Indicator of collected dust amount in vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a collected dust amount indicator capable of varying its operating point with the input automatically and hardly reducing the suction performance and generating functional obstacles by disposing an electromagnet for varying attraction of a magnetic body according to a slide volume for setting the input motor fan. CONSTITUTION:Since an urging force of a spring 16 is set to an operating point by a weak input, when the input of a motor fan 26 set by a slide volume 22 is weak, an electromagnet control unit 24 controls an electromagnet so that attraction of a magnetic body of the electromagnet composed of an electromagnetic coil 18 and iron core 19 is in the weakest. When a user increases the input of the motor fan 26 with the slide volume 22 provided on the handy part of a hose 23, a current value of the electromagnetic coil 18 is increased by the electromagnet control unit 24 reading the variation of the resistance value to intensify the attraction of the magnetic body of the electromagnet and attract a pointer 17 to the valve seat side. Thus, the operating point in which the pointer 17 is overcome by negative pressure in a main body 10 to start its operation can be hightened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dust collection amount display device for a vacuum cleaner having a variable input device for an electric blower.

Conventional technology Conventionally, the dust collection amount display device of this type of vacuum cleaner has been equipped with a spring so that the dust collection amount display device operates appropriately only when a strong input is applied, regardless of changes in the input of the electric blower caused by the variable input device. It was common to have settings such as pressure.

In addition, as an example of a device in which the operation of the dust collection amount display device is variable according to changes in the input of the electric blower,
It had a configuration as shown in Publication No. 42136.

The configuration will be explained below with reference to FIG.

As shown in the figure, connect one end to the negative pressure (-) of the vacuum cleaner.
Transparent pipe 1 with the other end communicating with the outside air side (+)
A pointer 3 that is slidable and biased by a spring 2 toward the outside air side is installed inside the pipe 1 on the outside air side (+) than the pointer 3, and is linked to the input changeover switch 4 by a connecting plate 5. It is composed of a movable and slidable lid 6 and a spring seat 7 that is disposed at the negative (-) end of the pipe 1 and holds the spring 2.

Problems to be Solved by the Invention In such conventional dust collection amount display devices, if the operation of the dust collection amount display device is not variable as in the former example, the main body cannot be turned off by input positions other than strong input. If you use
Not only does the dust collection display device not work properly, but if this device also serves as an air protector, in extreme cases there is a risk that the main unit may be damaged due to thermal deformation due to overheating of the electric motor. There was a problem.

In addition, in order to solve the above problem, as in the latter example, by sliding the lid 6 of the dust collection amount display device in conjunction with the input selector switch 4, the load on the spring 2 is changed, and the operating point is changed. Appropriate adjustment devices have been proposed, but since a gap is required between the lid 6 and the pipe 1, outside air may leak through the gap and reduce suction performance, or the lid 6 or the pipe 1 may Since it is located at the end on the outside air side, there is a problem in that fine dust gets caught between the lid 6 and the pipe 1, causing the lid 6 and the changeover switch 4 to become immovable.

The present invention solves the above problems, and provides a dust collection amount display device that automatically changes the operating point of the electric blower in response to changes in the input of the electric blower, and that reduces suction performance deterioration and malfunction. The purpose is to provide.

Means for Solving the Problems In order to achieve the above object, the present invention includes forming a part or the whole of a pointer slidably inside a pipe from a magnetic material, and a valve seat forming an outside air intake port. , is equipped with an electromagnet whose magnetic attraction force changes in response to the setting input of the slide volume that sets the input of the electric blower.

Function The present invention has the above-described configuration, and by setting the input using the slide volume for input setting of the electric blower, the magnetic attraction force of the electromagnet in the valve seat changes in accordance with the strength of the input, and in the normal state, the force of attracting the magnetic body of the electromagnet inside the valve seat changes. The operating point at which the pointer in contact with the valve seat begins to move when energized by the valve seat can be changed by the magnetic attraction force of the electromagnet. In other words, by making the electromagnet's magnetic attraction force larger as the electric blower's input becomes thicker, the point at which the pointer starts moving can be delayed, and it can respond to changes in the electric blower's input. The operating point of the guideline can be optimally maintained.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 4.

As shown in the figure, reference numeral 10 denotes a vacuum cleaner body which includes an electric blower and a dust collection chamber. Reference numeral 13 denotes a transparent pipe, one of which is connected to the dust collection chamber, which is a negative pressure section (-), via an elastic elbow 14, and the other is connected to the outside air (+). A valve seat 15 is attached to the outside air side (10) end of the pipe 13 and forms an air intake port 15a. pipe 13
A pointer 17 slidably housed inside the valve seat 15 is biased by a spring 16 toward the valve seat 15. Pointer 17 depending on the strength of negative pressure
If the valve seat 15 moves, the colored pointer 17 and the valve seat 15 move.
The length of the colored display section 15b also changes. Reference numeral 17a denotes side air flow passages provided on both sides of the pointer 17.

18 is an electromagnetic coil embedded in the valve seat 15 during component molding; 19 is a cylindrical iron core also embedded in the valve seat 15;
20 is a magnetic material embedded in the pointer 17. Reference numeral 21 denotes a storage section for storing the pipe 13 and the like between the main body 10 and the storage section 21, which has an indicator window 21a. 22 is a slide volume provided at the proximal portion of the hose 23 to set the input of the electric blower; 24 is an electromagnet control unit that controls the magnetic attraction force of the electromagnetic coil 18 in response to the slide volume setting input; 25 is an electromagnet control unit This is an input control unit that controls the input of the electric blower 26 based on the setting input of the slide volume 22.

In the above configuration, the basic operation of the dust collection amount display device is as follows:
When the dust collection chamber becomes full of dust, etc., the negative pressure inside the dust collection chamber increases. The urging force of the spring 16 is overcome by this negative pressure, and the pointer 17 moves inside the pipe 13, drawing outside air to the air intake port 15a.
The electric blower 26 is prevented from overheating by being taken in from the side air passage 17a and sent to the electric blower, and since the display part 15b of the valve seat 15 is visible from the display window 21a, the inside of the dust collection chamber 12 is dusty. This is to notify the user of an abnormal condition such as a heavy load.

In this operation, the biasing force of the spring 16 is applied to the electric blower 26.
If the operating point is set at the operating point due to a strong input of
Or, the biasing force is set lower than that.

Therefore, when the input of the electric blower 26 set by the slide volume 22 is weak, the electromagnetic coil 18 and the iron core 19
The electromagnet control unit 24 controls the electromagnet so that the magnetic body adsorption force of the electromagnet made up of the following is the weakest. As a result, the magnetic body attracting force of the electromagnet corresponding to the setting input of the slide volume 22 can be obtained.

Then, when the user increases the input of the electric blower 26 with the slide volume 22 provided at the hand of the hose 23, the electromagnet control unit 24 reads the change in the resistance value of the slide volume 22 and controls the current of the electromagnetic coil 18. The value is raised, the electromagnetic coil 18 and the iron core 19
The magnetic adsorption force of the electromagnet made up of the above becomes stronger. This magnetic attraction force acts on the iron piece 20 to attract the pointer 17 toward the valve seat. Therefore, it is possible to increase the operating point at which the pointer 17 loses the negative pressure inside the main body 10 and starts operating.

As described above, according to the dust collection amount display device for a vacuum cleaner according to the embodiment of the present invention, the magnetic body adsorption force of the electromagnet changes in response to the input of the electric blower 26 set by the slide volume 22, so that the optimum Since pointer 17 operates at the operating point,
It is possible to obtain a collected dust amount display device without deterioration in suction performance or functional failure.

Effects of the Invention As is clear from the above explanation, according to the present invention, the operating point of the pointer can be optimally maintained in response to the setting input of the slide volume for setting the input of the electric blower.
Regardless of the input settings of the electric blower, it is possible to notify the user when it is time to dispose of garbage at the optimal time, prevent the motor from overheating, and prevent performance degradation due to air leaks and functional failure due to garbage clogging. It is possible to provide a dust collection amount display device for vacuum cleaners.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the essential parts of a dust collection amount display device for a vacuum cleaner according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, and Fig. 3 is an electric vacuum cleaner equipped with the same chemical layer amount display device. A perspective view of the vacuum cleaner, FIG. 4 is a block diagram of an electric circuit of a dust collection amount display device of the same vacuum cleaner, and FIG. 5 is a side sectional view of a main part of a conventional vacuum cleaner dust collector. 10...Body, 13...Pipe, 15
... Valve seat, 16 ... Spring, 17 ...
...Pointer, 18...Electromagnetic coil, 19...
...Iron core, 20...Iron piece (magnetic material), 22.
...Slide volume, 26...Electric blower. Name of agent: Patent attorney Haruaki Ogata, 2 people 10--λ16--high base 1--1 person+5-47. 349 yen for 5 - Tetsuho - 1! :! 2'-Figure

Claims (1)

[Claims] A transparent pipe with one end communicating with the negative pressure part of the vacuum cleaner body and the other end communicating with the outside air, a pointer slidably inside the pipe and partially or entirely made of magnetic material, and the pointer The valve seat is provided with a spring that biases toward the outside air side, a valve seat that forms an outside air intake port of the pipe and has an electromagnet disposed therein, and a slide volume that sets the input of the electric blower, and sets the slide volume. A dust collection amount display device for a vacuum cleaner, which changes the magnetic attraction force of the electromagnet in response to an input.