JPH0548687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum cleaner capable of detecting dust passing through a ventilation path.

[Conventional technology]

Conventionally, this type of vacuum cleaner was developed in 1986-195660.
Regarding the structure of Utility Model Application Publication No. 195660/1983, which is known as shown in the publication, No. 10
This will be explained with reference to FIGS.

A light emitting diode 1 is installed in the lower case 111 in the suction air path 108 from the floor brush 109 of the vacuum cleaner to the suction port (not shown) of the vacuum cleaner body (not shown).
A photodiode 102 is provided in the upper case 110 opposite to the light emitting diode 101, and the photodiode 102 receives light from the light emitting diode 101. When the photodiode 102 contains a large amount of dust in the airflow flowing through the suction air passage 108 during cleaning, the light from the light emitting diode 101 is blocked by the dust, and the amount of light received by the photodiode 102 decreases, resulting in a small output. Become. As a result, the transistor 1 connected to the base of the photodiode 102 shown in FIG.
03 becomes OFF state. As a result, the transistor 104 in the next stage is turned off, and the transistors 105 and 106 are turned on, respectively.
A light emitting diode 107 serving as a display section lights up.
While this light emitting diode 107 is lit, it indicates that dust is being sucked. Moreover, when the suction dust disappears, the amount of light received by the photodiode 102 increases, contrary to the above, and the output becomes large, and the transistors 103 and 104
is turned on, transistors 105 and 106 are turned off, and light emitting diode 107 is turned off. Turning off the light emitting diode 107 indicates that there is no longer any dust to be sucked, and the cleaning ends. [Problem to be solved by the invention] However, such conventional vacuum cleaners Since the photodiodes 102 and 102 are placed in the upper and lower cases 110 and 111 of the floor brush 109, the wiring becomes complicated during assembly, and there is a risk that their positions may shift or the suction air path 10
Since the device 8 includes a dust detection device, it has problems such as dust easily adhering to it, resulting in malfunction and difficulty in cleaning it.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to accurately catch dust that is sucked into a vacuum cleaner, and to improve the assemblability of the vacuum cleaner.

[Means to solve the problem]

The vacuum cleaner according to the present invention includes a vacuum cleaner body that includes an electric blower and a dust collection chamber, a floor brush body that has an opening on the bottom surface, and a hollow bearing that projects outward from the floor brush body. a floor brush having an elbow rotatably supported by the elbow and having an opening communicating with the opening; one end communicating with the dust collection chamber;
It includes a ventilation pipe whose other end communicates with the elbow, and a light emitting part and a light receiving part located in the bearing parts formed at both ends of the elbow supported by the floor brush body, and optically detects dust. It is equipped with a dust detector.

[Effect]

The vacuum cleaner according to the present invention is equipped with a dust detector that optically detects dust on both axes of the elbow of the floor brush, so not only can the positioning of each part of the dust detector be accurate, but also the wiring [Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings. 1 is a vacuum cleaner body having a suction port 3 and a dust collection chamber 4 on the upstream side of the electric blower 2, and an exhaust port 5 on the downstream side;
Reference numeral 6 denotes a bendable hose having one end detachably attached to the suction port 3 and the other end having a main body hand switch 7 and a gripping part 8, and 9 and 9' having one end attached to the gripping part 8 and the other end to be described later. Extension pipes 10 are supported by a floor brush 10 so that they can be fitted freely, 10 is a floor brush, and the external appearance is a lower case 11 and an upper case 12,
Furthermore, a bumper 13 made of a soft material is fixed to both cases, a front cover 14 is detachably supported on the front upper surface, and a front cover 14 is rotatably supported between the upper case 12 and the lower case 11 at the rear center part. It is composed of an elbow 15 which will be described later. 16 is a rotary brush 18 whose both ends are rotatably supported by the lower case 11 and the front cover 14, and in the center thereof a large number of brush bristles 17, 17' for collecting dust are implanted.
is an electric motor, and a belt 20 for rotating the rotary brush 16 is wound around a shaft 19. The other end of this belt 20 is wound around a shaft 21 of the rotary brush 16. 22 is a board having various electrical parts 23, 23' for controlling the rotation of the electric motor 18. Reference numerals 24 and 24' denote notches for introducing outside air formed in the lower case 11, and have filters 25 and 25' inside thereof, respectively. 15
has support hole A26 and support hole B27 inside at both ends.
The elbow has convex bearings A, B28, 29, and the convex bearings A, B28, 29 are rotatably connected to the bearing holes A, B30, B30, in the upper and lower cases 12, 11.
It is supported by 31. Further, a fitting part 32 provided at the other end of the elbow 15 is fitted with the pipe 9, and the outside air is passed from the floor brush 10 to the pipe 9, the hose 6, the dust collection chamber 4, the electric blower 2, and the exhaust port as shown by the arrow. 5, a light emitting diode 33 is supported in a support hole A26 and has an outside air passage hole A34 around it, and 35 is a light emitting diode that is supported in a support hole B27 and has an air passage hole A34 around it. This is a photodiode that receives the light emitted from the light emitting diode 33 and is formed with an outside air passage hole B36 at the side thereof.

Next, the operation will be explained with reference to the circuit diagram shown in FIG. When the power plug 37 is inserted into an outlet (not shown) and the hand switch 7 is turned on, the transformer relay 38 becomes energized, and the voltage of the secondary circuit on the hand switch 7 side is reduced. At this time, transformer relay 3
The switch terminal 39 inside 8 is attracted by the relay.
The motor 18 on the primary circuit side is rectified by the diode bridge 40 and further stepped down by the resistor 41, and is operated through the relay 42'. That is, the brush 16 rotates. On the secondary circuit side, a photodiode 35 receives light from a light emitting diode 33 that has been rectified by a diode bridge 43. At this time, when the suction dust flowing through the suction air path 44 blocks the light from the light emitting diode 33, the amount of light received by the photodiode 35 decreases, resulting in a smaller output.As a result, the transistors 45 and 46 connected to the base of the photodiode 35 are turned off. The transistors 47 and 48 are each turned on, and the light emitting diode 49 serving as the display section is lit. Furthermore, the relay 42 connected in series with the light emitting diode 49 is also energized, and the relay switch 42', which is connected in series with the resistor 41 and the motor 18 on the primary side, is switched to the non-resistance circuit side 50, and the motor 18 is switched to the non-resistance circuit side 50. improve rotation. That is, when there is a lot of dust in the suction air passage 44, the light emitting diode 49 lights up to indicate to the user the dirt on the floor surface, and increases the number of rotations of the rotating brush 16 of the floor brush 10 to improve the cleaning performance.

Further, FIG. 8 shows that the rotation of the electric blower 2 built into the main body 1 is controlled by the operation of a relay 42 and a relay switch 42'' connected in series with a light emitting diode 49, and as described above, a large amount of air is sucked into the dirty floor surface. Furthermore, FIG. 9 shows a system in which the light emitted by the light emitting diode 49 and the rotation of the electric blower 2 in the main body 1 and the electric motor 18 in the floor brush 10 are controlled simultaneously to clean the dirty floor surface. The power of both electric motors 2 and 18 is increased.It goes without saying that each electric motor 2 and 18 may be rotated steplessly depending on the brightness of the light emitting diode 49. Furthermore, in order to inform the user of the degree of rotation of the electric motor 18, a standard rotation indicator lamp (not shown) separate from the indicator lamp 49 is connected in series with the resistor 41, or a strong rotation indicator lamp (not shown) is connected to the non-resistance circuit side. 50
If the floor brush 10 is connected in series with the floor brush 10, the functions of the floor brush 10 will be further enhanced. It goes without saying that the same effect can be obtained even if these indicator lamps are attached as shown in FIGS. 8 and 9. Furthermore, by attaching these indicator lamps to the floor brush 10, the user can always see them during normal cleaning, which is very convenient.

〔Effect of the invention〕

As described above, according to the present invention, since the dust detectors are provided opposite to both axes that are the rotation centers of the elbow, dimensional accuracy and electrical connection are possible, and the cleanliness display of suctioned dust is improved.

In addition, since the light emitting part and the light receiving part are provided in the bearing parts formed at both ends of the elbow, the positioning of the light emitting part and the light receiving part becomes easy, which in turn improves detection accuracy. Moreover, the light emitting section and the light receiving section are protected by the outer wall of the bearing section.

Furthermore, since the direction of air from the suction port side of the elbow to the suction side of the elbow changes depending on the rotation angle of the elbow, for example, even if dust adheres to the light emitting part and the light receiving part, the dust can be blown away by changing the wind direction.

[Brief explanation of the drawing]

Figures 1 and 2 are external views of a vacuum cleaner that is an embodiment of the present invention, Figure 3 is an external view of the floor brush shown in Figure 1, and Figure 4 is a cutaway of the main parts of Figure 3. 5 is a perspective view of the elbow, FIG. 6 is an enlarged sectional view of the bearing portion of the elbow, FIG. 7 is a circuit diagram of the present invention, and FIGS. 8 and 9 are diagrams of other embodiments of the present invention. A circuit diagram of the embodiment, FIG. 10 is a circuit diagram of a conventional vacuum cleaner dust detection device, FIG. 11 is an external view of a floor brush, and FIG. 12 is a sectional view of the main parts of the installation of the light emitting device of the floor brush. . In the figure, 1 is the vacuum cleaner body, 2 is an electric blower, 4 is a dust collection chamber, 6, 9 are ventilation pipes, 10 is a floor brush, 15 is an elbow, 28, 29 are shafts, 33, 3
5 is a dust detector, and 34 and 36 are gaps for outside air to enter. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A vacuum cleaner body with a built-in electric blower and a dust collection chamber, a floor brush body with an opening on the bottom surface, and a rotatably supported floor brush body via a hollow bearing protruding outward. a floor brush having an elbow provided with an opening communicating with the opening; a ventilation pipe having one end communicating with the dust collection chamber and the other end communicating with the elbow; both ends of the elbow supported by the floor brush body; A vacuum cleaner comprising a light emitting part and a light receiving part located in the bearing part formed in the bearing part, and comprising a dust detector that optically detects dust.