JPS60207630A - 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 Industrial Application The present invention relates to a vacuum cleaner having a mechanism for electrically detecting changes in an air flow sensor provided in an air flow path caused by an electric blower and controlling the electric blower based on this. It's about machines.

Conventional 4# configuration and its problems Figures 1 and ff12 show the structure of a conventional airflow sensor, where l is an electric blower, and the outer periphery of the front end of the electric blower l is connected to the front elastic body 2. The rear end is held and fixed within the motor case 4 by the rear elastic body 3. The exhaust from the electric feeder # is motor case 4.
It is completely discharged from exhaust holes 5a and 5b provided at the rear of the periphery of the lower blade on both sides. Therefore, the electric air blowers ja, l are sealed in the motor case 4 via the front elastic body 2. Further, a circumferential edge 1'' portion 5C that protrudes to external force is integrally formed on the circumferential edge of one exhaust hole 5a, and a reinforcing rib 5e is integrally provided on the circumferential edge of the other exhaust hole 5b. Reference numeral 6 denotes a wind receiving plate, which is in close contact with the peripheral opening 5G of the exhaust hole 5a so as to be openable and closable. 6a is the wind plate L
The rotating shaft 7a of the variable resistor 7 is a cylindrical shaft fixed to the end edge.
It is press-fitted and fitted. Reference numeral 8 denotes a tension spring, one end of which is fixed to the tip hook hole 9a of the fixed spring tongue 9, and the other end of which is attached to a hook boss portion 6 protruding from the cylindrical shaft portion 6a of the wind receiving plate 6.
It is fixed at b. Due to the tensile force of the pull I conduit 8, the wind receiving plate 6 is always pressed in close contact with the peripheral opening 5C of the bleed hole 5a, completely closing the bleed hole 5a.

The motor case 4 is fixed on the inner surface of the vacuum cleaner main body 1O via receiving posts 1Oa protruding from both inner surfaces of the main body 10 and holding posts 4a integrally formed on both sides of the motor case 4. . 11 is a side elastic body;
It is sandwiched between the holding post 4a and the receiving boss 10. In addition, the inner lining 12 attached to the rear outer peripheral surface of the electric blower l,
The gasket 13 electrodeposited on the rear inner surface of the motor case 4 is a sound absorbing material intended to reduce noise.

When the electric blower l is driven, air is sucked and exhausted into the motor case 4. The exhaust gas filling the motor case 4 is first exhausted through the gripping hole 5b without the wind catcher plate 6, but if it cannot be exhausted through the exhaust hole 5b alone, it is exhausted through the exhaust hole 5a where the wind catcher plate 6 is provided. As a result, the wind pressure acts on the wind receiving plate 6. Therefore, the wind receiving plate 6 is pushed and expanded in the direction of the arrow X by this wind pressure, against the force of the tension spring 8, with the cylindrical shaft portion 6a as the center. At that time, the opening/closing degree of the wind receiving plate 6 changes due to a change in wind pressure, and the change is transmitted to the rotating shaft 7a of the fTl resistor 7, and the signal detected by the variable resistor 7 is transmitted to the electric control unit (not shown). The electric blower l is operated by the output. However, in the mechanism of the wind receiving plate 6 having such a cylindrical shaft part,
There was a problem in that a twisting force was generated between the cylindrical shaft portion 6a of the wind receiving plate 6 and the rotating shaft 7a of the variable resistor 7, and the operation of the wind receiving plate 6 could not be detected reliably. Furthermore, the wind receiving plate 6 is
At the time of 8B, the peripheral edge rJ part 5 of the exhaust hole 5a of the motor case 4
There was a problem in that a tension spring 8 had to be used in order to keep the spring in pressure contact with C.

OBJECTS OF THE INVENTION The present invention solves the conventional drawbacks as described above, uses a leaf spring, coil spring, etc. to support the wind catch plate provided in the air system path of an electric blower, and changes the operation of the wind catch plate. By using an air volume sensor that electrically detects the air flow using a Hall element, etc., changes in the operation of the wind receiving plate can be precisely detected, and the electric blower can be reliably controlled using No. 13 based on this detection. This is an attempt to provide opportunities.

Structure of the Invention In order to achieve the above-mentioned object, the vacuum cleaner of the present invention has a wind receiving plate provided in close contact with an exhaust hole in an air flow path of an electric blower and is supported by a spring such as a plate/henge or a coil spring. It is equipped with an air volume sensor that detects changes in the operation of the receiving plate using a Hall element, etc., and an electronic control unit that sets the input of the electric blower based on the signal detected by the air volume sensor.

In the present invention, since the wind receiving plate provided in close contact with the exhaust hole of the electric blower is supported by a leaf spring or the like, a reliable sealed state can be obtained at all times. By using an air volume sensor such as a Hall element to accurately detect fluctuations in airflow, and controlling the electric blower via an electronic control unit based on this detection, extremely accurate control can now be achieved. There is.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

I4 is the main body of the vacuum cleaner, and Tastbonx 15 is removably attached to the front part. The dust box 15 has an air intake hole 16 at the center of the front surface, and a handle 17 at the -L side.
are connected together. The rear lower end of the handle 17 is detachably engaged with one portion of the vacuum cleaner main body 14 by a buckle mechanism 18. Further, inside the vacuum cleaner body 14, a partial inner frame plate 14a and a lower inner frame plate +4b are provided, and a cord reel mechanism 18 is disposed inside the main body on the F side of the lower inner frame plate +4b. An electronic control section 20 having a control circuit, an operation switch, a display function, etc. is disposed inside the main body on the north side of the L inner frame plate 14a. 21 is a motor case, which is a lower inner frame plate 14a of the main body 14;
14 b, and an electric blower 22 is installed inside.
has been established. The front end outer circumferential portion of the electric blower 22 is pressed and fixed to the front end inner circumferential surfaces of the one-nid inner frame plates 14a and 14b by the front elastic body 23, and the rear end surface is pressed to the inner surface of the rear wall of the motor case 21 by the rear elastic body 24. Retained and fixed. 25 is a filter device, which is built in the dust box 15.

Next, the configuration of the airflow sensor section will be explained. The motor case 21 has exhaust holes 21a and 21b formed at the rear of the periphery on both sides thereof. Electric blower 22
One of the six exhaust holes 21a is closed to the motor case 21 through the front elastic body 23 so that the exhaust from the exhaust holes 21a and 21b is completely exhausted. The peripheral edge has an outwardly protruding peripheral opening 21.
c are integrally formed, and a reinforcing rib 21e is integrally provided on the periphery of the other exhaust hole 21b. Reference numeral 26 denotes a wind receiving plate, which is in close contact with the peripheral opening 21c of one of the exhaust holes 21a so as to be openable and closable, and is held by a plate spring 27 by welding or the like.

The leaf spring 27 is fixed to the peripheral opening portion 21f by a hissing member 28 or the like. In addition, a magnet 29 is installed in a part of the wind receiving plate 26, and the peripheral opening 21c is arranged so as to correspond to the direction of the magnetic force of the magnet.
A Hall element 30 and the like are arranged near the.

Therefore, the wind receiving plate 2B is always operated by the force of the leaf spring 27.
is pressed into close contact with the peripheral opening 21c of the exhaust hole 21a,
The exhaust hole 21a is completely closed.

The motor case 21 is fixed on the inner surface of the vacuum cleaner main body 14 via holding posts 14c integrally formed on both sides of the main body 14 and receiving bosses 21g protruding from both sides of the motor case 21. ing. Reference numeral 31 denotes a side elastic body, which is sandwiched between the holding boss 14c and the receiving boss 21g.

The inner lining 32 fitted on the rear outer peripheral surface of the electric blower 22, the gasket 33 tightly attached to the rear inner surface of the motor case 21, and the gasket 35 attached to the inner surface of the exhaust hole 34 formed at the rear of the vacuum cleaner body 14 reduce noise. This is a sound-absorbing material intended for this purpose.

When the electric blower 22 is driven, the floor nozzle, connecting pipe,
The air is sucked into the Das I-Ponx 15 through the intake hole 16 through a hose or the like (not shown). Here, air and dust are separated by a filter device @25, and clean air passes through an electric blower 22 and is exhausted into the motor case 21.

The exhaust gas filling the motor case 21 first passes through the wind receiving plate 2.
6 is exhausted from the exhaust hole 21b, but this exhaust hole 2
If the air is not discharged only through the wind receiving plate 2B, the wind pressure acts on the wind receiving plate 26 in an attempt to discharge the air through the exhaust hole 21a provided with the wind receiving plate 2B. Therefore, the wind receiving plate 26 is pushed 17 and expanded in the direction of arrow Y by this wind pressure against the force of the leaf spring 27.

In this situation, the object to be cleaned, such as the floor,
When the amount of air sucked by tatami mats, carpets, etc. changes, the amount of air discharged from the electric blower 22 also changes, and the amount of air discharged from the motor case 21 also changes proportionally.

Therefore, the opening degree of the wind receiving plate 2G changes, and the magnetic force from the magnet 29 applied to the Hall element 30 changes proportionally accordingly.

The electrical control unit 20 is controlled by the signal detected by the Hall element 30.
The electric blower @22 is controlled and operated by the output through the. At this time, the movement of the wind receiving plate 26 is due to the support of the leaf spring 27.
There is no twisting force like in the past, and the movement is reliably detected. Also, the wind receiving plate 26 is connected to the peripheral opening 21c of the exhaust hole 21a.
There is no need for springs, etc., which are required to press the product into contact with the product, resulting in cost savings. Further, since the mechanism for detecting changes in the operation of the wind receiving plate 26 uses a Hall element or the like, it is simple and has great effects such as reducing the number of assembly steps. In addition, the exhaust hole 21
The air discharged from a and 21b is discharged to the outside of the vacuum cleaner main body 14 through the discharge hole 34.

Further, since the fluctuation of the wind receiving plate is precisely detected electrically using a Hall element or the like, the same effect can be obtained even when the wind receiving plate is supported by a coil spring. In other words, when the wind receiving plate is operated, reliable operation and control can be achieved by reducing the operating resistance at the support portion.

FIGS. 6 and 7 are an enlarged front view and a cross-sectional view when the wind receiving plate is supported by a coil spring. The wind receiving plate 36 is supported by a coil spring 37 and is in pressure contact with the peripheral edge 11 38a of the exhaust hole 38. 39 is a magnet, and 40 is a Hall element.

Effects of the Invention As described in F, the present invention uses a spring support such as a plate spring or a coil spring for the wind receiving plate disposed in the air passage of an electric blower, and electrically measures fluctuations due to wind pressure fluctuations using a Hall element or the like. Since an air volume sensor is used to detect the air volume, it can be detected reliably, and since the operation of the electric blower is controlled based on the fluctuation, precise control of the IF can be realized, and smooth operation is possible. In addition, the structure is simple and the wind receiving plate is supported by springs, so
The operating resistance is low, making it possible to prevent unnecessary losses. Furthermore, the number of parts and the number of assembly steps can be reduced, resulting in various effects such as cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal sectional view showing the structure of a conventional airflow sensor, Fig. 2 is a sectional view of the main part of the conventional example, Fig. 3 is a sectional view of the main part of the vacuum cleaner of the present invention, and Fig. 4 is a sectional view of the main part of the conventional vacuum cleaner. FIG. 1 is a partial vertical sectional view showing the structure of the wind sensor of the present invention. FIG. 5 is a sectional view of the same essential part, and FIGS. 6 and 7 are an enlarged front view and a sectional view showing other embodiments of the spring support. 14...Vacuum cleaner body 20...Electronic control unit 2+
a, 3B...Air loss hole 22...Electric blower 26.
36... Wind receiving plate 27... Leaf spring 30.40...
Hall element 37... Coil spring agent Patent attorney Oshima-Ko Figure 1 Figure 2 Figure 4 Figure 23 Figure 5 Figure 6 w47 Figure 8a

Claims (1)

[Claims] A wind receiving plate installed in close contact with the exhaust hole in the air flow path is supported by a spring such as a leaf spring or a coil spring, and changes in the operation of this wind receiving plate are detected using a Hall element, etc.! 123 sensor and an electronic control unit configured to set the input of an electric blower based on a signal detected by the air volume sensor.