JPS60160936A - 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 having a mechanism for electrically detecting and controlling changes in a wind sensor provided in an air flow path.

Conventional configuration and its problems Figures 1 and 2 show the conventional air flow sensor structure.
The figure shows a partial longitudinal section, and FIG. 2 shows a sectional view taken along the line A-A' in FIG. 1.

In the figure, (1) is an electric blower;
The outer periphery of the front end is held and fixed to the motor case (4) by the front elastic body (2) and the rear end surface by the rear elastic body (3). The motor case (4) has exhaust holes (5a) and (5b) formed at the rear of the lower part on both sides, and exhaust from the electric blower (1) is carried out through these exhaust holes (5a) and (5a).
5b) so that it is completely ejected from the motor case (4).
In contrast, the front elastic body (2) provides a sealed structure. Further, an outwardly protruding mouth edge (5a') is integrally formed on the peripheral edge of one exhaust hole (5a), and a reinforcing rib (5'II+) is formed on the peripheral edge of the other exhaust hole (5b). ') are integrally provided. (6) is a wind receiving plate that is attached to the mouth edge (5a') of the exhaust hole (5a) so as to be openable and closable, and the shaft tube part (6a) fixed to the upper edge of the wind receiving plate is attached to the rotating shaft of the variable resistor (7). (7a) is press-fitted and fitted. (8) is a tension spring for exhaust pressure, one end of which is connected to the tip hook hole (9) of the spring hook (9).
9a), and the other end is fixed to the shaft cylinder part (6a) of the wind receiving plate (6).
The wind receiving plate (6) is fixed to the hook boss portion (6b) protruding from the exhaust hole (5a) under normal conditions due to the tensile force of the exhaust pressure tension spring (8). The exhaust hole (5a) is completely closed by pressing the exhaust hole (5a). The motor case (4) has side elastic bodies attached to receiving bosses (10a) protruding from both inner surfaces of the vacuum cleaner main body QCi and holding bosses (4a) integrally formed on both sides of the motor case (4). It is inserted, fixed and held via aυ. In addition,
The inner lining fitted on the outer peripheral surface of the rear part of the electric blower (1) and the inner lining tightly attached to the inner surface of the rear part of the motor case (4) are sound absorbing materials for reducing noise.

With this configuration, air is taken in and exhausted into the motor case (4) by driving the electric blower (1). The exhaust gas filling the motor case (4) is first discharged through the exhaust hole (5b) which is not provided with the wind receiving plate (6), but it cannot be completely exhausted through this exhaust hole (5b) alone.
When trying to discharge air from the exhaust hole (5a) provided with the wind catch plate (6), the wind pressure acts on the wind catch plate (6), and the wind catch plate (6) resists the force of the exhaust pressure tension spring (8). ) is pushed out in the direction of the arrow x with the shaft cylinder part (6a) as the center. At that time, the degree of opening and closing of the wind receiving plate (6) changes due to changes in wind pressure,
transmitting the change to the rotating shaft (7a) of the variable resistor (7),
The electronic control unit (
(not shown), and the electric blower (1) is operated by the output. However, in such a structure, the shaft cylinder portion (of the wind receiving plate (6)), which is the starting point of the wind receiving plate (6)
Rotating shaft (7a) of variable resistor (7) coaxial with 6a)
There is a problem in that dust enters and adheres to the exhaust pressure tension spring (8), resulting in incomplete operation or locking.

Purpose of the Invention The present invention eliminates these conventional drawbacks, and by locating the starting point and spring portion of the wind catch plate outside the exhaust passage, a reliable wind catch can be achieved without dust entering them. The purpose is to obtain the movement of the plate and to control it with high precision.

Structure of the Invention According to the present invention, an electric blower is sealed in a motor case, exhaust ports are provided on the left and right sides of the lower rear part of the motor case, and a wind receiving plate is opened in close contact with one of the exhaust ports at all times.

An air volume sensor that is provided so as to be freely closed, opens and closes the wind receiving plate in response to wind pressure to change the resistance value of the variable resistor, and generates a signal from the variable resistor, and a control circuit that transmits the signal detected by the air volume sensor. In a vacuum cleaner that controls an electric blower, a housing portion is provided integrally with the motor case at the bottom of the exhaust port provided with the wind catch plate (hereinafter referred to as the wind catch plate exhaust port), and the A variable resistor is housed in a casing, a hole (hereinafter referred to as casing hole) is provided in the upper part of the casing, and a terminal part of the variable resistor protrudes from the casing hole to cover the wind receiving plate. The wind receiving plate is fixed, and the wind receiving plate is provided within the exhaust passage of the electric blower exhaust air, and its starting point is provided outside the exhaust passage, and the air volume sensor changes due to the exhaust air volume that changes in accordance with the change in the intake air volume. It was designed to make the students do the following.

DESCRIPTION OF EMBODIMENTS An embodiment of the vacuum cleaner of the present invention will be described below with reference to FIGS. 3 to 6.

FIG. 3 is a cutaway sectional view of essential parts of the vacuum cleaner of the present invention, FIG. 4 is a partial vertical sectional view of the air volume sensor structure of the present invention, and FIG. 5 is a cross-sectional view taken along line B-13' in FIG. 4. Fig. 6 shows a perspective view of the wind receiving plate section.

In the figure, I is a vacuum cleaner main body, and a dust box α9 is detachably attached to the front part of the vacuum cleaner main body. This dust box aω has an air intake hole Q6) in the central part of the front surface, and a handle 07) is integrally connected to the upper part.

The rear lower end of the handle ση is removably engaged with the upper part of the vacuum cleaner main body Q4) by a buckle mechanism α mark. In addition, an upper inner frame plate (14a) and a lower inner frame plate (14b) are stretched inside the vacuum cleaner body, and the lower inner frame plate (''+b)
A cord reel mechanism aω is disposed inside the main body on the bottom side of the upper inner frame plate (14a), and an electronic control unit (A) having a control circuit, operation switch display function, etc. is disposed inside the main body on the top side of the upper inner frame plate (14a). It is. Qυ is the main body 041
The motor case is placed between the upper and lower inner frame plates (14a) and (14b), and an electric blower is installed inside the motor case. The upper and lower inner frame plates (14a) and (14b) are press-fitted and fixed to the inner peripheral surfaces of the front end portions by the west, and the rear end surfaces are held on the inner surface of the rear wall of the motor case 0D by the rear elastic body Q4).
It is fixed. (c) is a filter device built into the dust box α9.

Next, the structure of the airflow sensor section, which is a component of the present invention, will be explained.

The motor case Cυ has exhaust holes (21a) and (21b) formed at the rear of the lower periphery on both sides, and an electric blower (21b).
Exhaust from the
) has a sealed structure with respect to the motor case QD via a front elastic body (c) so that it can be completely ejected from the motor case QD. Further, an outwardly protruding mouth edge (27) is integrally formed on the peripheral edge of one exhaust hole (21a), and the other exhaust hole (21a)
, 1)) are integrally provided with reinforcement (ribs (21/), c++i) are connected to one of the aforementioned exhaust holes (21a).
The wind receiving plate protrudes above the slide resistor (C) and is fixed to the vertical part (27R) of the cross-shaped terminal part (27a) on which the resistor slides. Slide resistor (2
One is placed at the bottom of the slide resistor housing (28A) integrally formed with the motor case Qυ. The terminal part (2
A tension spring wire is attached to the end portion (27b) of the horizontal portion (27H) of 7a) with the hook portion (21d) of the motor case Qυ.

Therefore, in the normal state, the terminal portion (27a) of the slide resistor 0η, that is, the wind receiving plate (to) is located closer to the electric blower OZ. Also, the terminal part of slide resistor 01 (
27a) is designed to protrude from a gap (30-1) of an elastic body (toward) formed in the room (toward) along the operating direction of the terminal portion (27a). The motor case r20 has a side elastic body O0 attached to a holding boss (21c) integrally formed on both sides thereof, and a side elastic body Gυ attached to the vacuum cleaner main body Q.
The vacuum cleaner main body (+41) is held by inserting and fixing it into the receiving bosses (14c) protruding from both sides of the vacuum cleaner body (+41).

In addition, the inner lining 0 fitted on the rear outer peripheral surface of the electric blower Q4
2, the gasket 031 that is tightly attached to the rear inner surface of the motor case Cal+, and the exhaust hole gasket 3 that is attached to the inner surface of the exhaust hole formed at the rear of the vacuum cleaner body θ are sound absorbing materials to reduce noise. .

The operation of an embodiment configured like the vacuum cleaner of the present invention will be explained.

Air and dust are sucked into the dust box 09 from the air intake hole 0ω through the floor nozzle, connecting vibrator, hose, etc. (not shown) by driving an electric blower, and the dust is separated by a filter device. Electrically delivered clean air
It passes through I4 and is exhausted into the motor case (21).

The exhaust gas filling the mork case t2+j is first discharged through the exhaust hole (21b) which is not provided with the wind receiving plate (261), but this exhaust hole (21b) alone cannot exhaust the exhaust gas, and the wind receiving plate c!6) is exhausted. As the air is being discharged from the provided exhaust hole (21a), the wind pressure acts on the wind receiving plate t26), and the wind receiving plate (a) is moved in the direction of the arrow against the force of the tension spring QI.

In this situation, the object to be cleaned, such as the floor,
When the amount of air sucked in by tatami mats, carpets, etc. changes, the amount of air emitted from the electric blower (motor case ca1 changes due to the change in the amount of air emitted from the 2nd floor) will also change proportionally. The mobility of (a), that is, the terminal part (27a) of the slide resistor Qη changes proportionally, and this is detected by the slide resistor 0η, and controlled by the electronic control unit Q■ based on the detected signal. The output is used to operate an electric blower (2).

In this way, the air discharged from the exhaust holes (21a) and (21b) is discharged to the outside of the vacuum cleaner main body 0→ from the exhaust hole (34).

At this time, the slide resistor (27), which is the starting point of the wind receiving plate +261, and the tension spring (29) are isolated from the exhaust passage by the elastic body 0Q and the chamber C~ formed in a part of the motor case (21). Therefore, the intrusion of dust contained in the exhaust air is almost eliminated, and adhesion can be prevented.
! It is possible to ensure the operation of e, and it is possible to perform accurate control.

Effects of the Invention As is clear from the above embodiments, the present invention makes it possible to reliably operate the change in the air volume sensor placed inside the exhaust passage by arranging the starting point of the air volume sensor outside the exhaust passage. Become.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical sectional view of a conventional airflow sensor, Fig. 2 is a sectional view taken along the line A-AI in Fig. 1, Fig. 3 is a cutaway sectional view of main parts of the vacuum cleaner of the present invention, and Fig. 4. is a partial vertical sectional view of the air volume sensor of the present invention, and FIG. 5 is taken along the line BB' in FIG.
The line sectional view and FIG. 6 show a perspective view of the wind receiving plate. Type of work: Vacuum cleaner body 20: Electronic control section 21; Motor case 21a: Exhaust hole 21a': Mouth edge 21
b: Exhaust hole 211+/: Reinforcement rib 22: Electric blower 23: Front elastic body 24 Rear elastic body 25: Filter device 26: Wind receiving plate 27: Slide resistor 27a;
Terminal part 27R: Vertical part 27H: Horizontal part 27b: End part 28A: Housing 28A-1: Terminal part hole 28: Indoor 29: Tension spring 30: Elastic body 30-1: Gap between elastic body 31: Side elasticity Body 32: Lining 33: Packing 34: Exhaust hole 35: Exhaust hole backing Patent applicant: Matsushita Electric Industrial Co., Ltd. Representative Patent Attorney Isao Abe

Claims (1)

[Claims] An electric blower is sealed in a motor case, exhaust ports are provided on the left and right sides of the rear lower part of the motor case, and a wind receiving plate is provided in close contact with one of the exhaust ports so as to be able to be opened and closed at will, and the wind receiving plate is configured to respond to wind pressure. An air volume sensor that opens and closes to change the resistance value of a variable resistor and generates a signal from the variable resistor, and a vacuum cleaner that controls an electric blower by supplying a signal detected by the air volume sensor to a control circuit, A casing is provided integrally with the motor case at the bottom of the exhaust port provided with the wind catch plate (hereinafter referred to as the wind catch plate exhaust port), a variable resistor is housed in the casing, and the casing is A hole (hereinafter referred to as a housing hole) is provided in the upper part of the part, and the terminal part of the variable resistor protrudes from the housing hole to fix the wind receiving plate, and the wind receiving plate is used for discharging the exhaust air of an electric blower. A vacuum cleaner characterized in that the vacuum cleaner is provided inside the passage, and its starting point is provided outside the exhaust passage.