JPH0548689B2 - - 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 1956.
The one shown in the publication is known. Below is the first part regarding the structure of Utility Model Application No. 195660.
This will be explained with reference to FIGS. 0 to 12.

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 to face 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 103 connected to the base of the photodiode 102 shown in FIG. 10 is turned off.

As a result, the next stage transistor 104
It becomes OFF state, and transistors 105 and 106
are each turned on, and the light emitting diode 107 serving as the display section lights up. When this light emitting diode 107 is lit, it indicates that it is sucking in dust. Moreover, when the suction dust disappears, contrary to the above, the amount of light received by the photodiode 102 increases and the output becomes large, transistors 103 and 104 are turned on, transistors 105 and 106 are turned off, and the light emitting diode 107 is turned off. This light emitting diode 10
The turning off of the light at 7 was to notify that there was no longer any dust to be sucked, which meant that the cleaning had ended.

[Problems to be Solved by the Invention] However, such a conventional vacuum cleaner has a light emitting diode 101 and a photodiode 10.
2 to the upper and lower cases 110 and 11 of the floor brush 109
1, the results will be complicated when assembling, and there is a risk that their positions will shift, and since there is a dust detection device in the suction air path 108, dust can easily adhere to it, causing malfunctions and making cleaning difficult. It had some problems. Moreover, nothing has shown the relationship between the floor brush, which has a built-in electric motor that drives the rotating brush, and the dust detection device.

In view of the above problems, it is an object of the present invention to accurately catch dust sucked into a vacuum cleaner, use its output to control an electric motor that drives a rotating brush, and to improve its ease of assembly. .

[Means to solve the problem]

A 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, and a floor brush body rotatably supported via a hollow bearing projecting outward. a floor brush having an elbow that is supported by the floor brush body, the floor brush having a ventilation pipe that communicates with the dust collection chamber at one end and communicates with the elbow at the other end; It consists of a light emitting part and a light receiving part located in a bearing part, and is equipped with a dust detector that optically detects dust, and the bearing part is provided with an opening through which incoming air passes from other than the suction port. It is something.

[Effect]

The vacuum cleaner of this 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 It also becomes easier,
In addition, the rotation of the electric motor is controlled according to the amount of light received by the light receiving part of the dust detector, so the rotating brush rotates more powerfully on dirty floors, and slows down on relatively clean surfaces, saving power. Of course, it helps extend the lifespan of the carpet.

[Embodiments of the invention]

An embodiment of the present 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 an 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. Floor brush 10 described later
, extension pipes supported so that they can be fitted freely,
Reference numeral 10 denotes a floor brush, and its appearance includes a lower case 11 and an upper case 12, a bumper 13 made of soft material fixed to both cases, a front cover 14 detachably supported on the front upper surface, and a rear central part. It consists of an elbow 15, which will be described later, which is rotatably attached to the upper case 12 and the lower case 11. Reference numeral 16 is a rotary brush whose both ends are rotatably supported by the lower case 11 and the front cover 14, and in which a large number of brush bristles 17 and 17' are planted in the center for collecting dust. A belt 20 for rotating the rotating brush 16 is wound around it. The other end of this belt 20 is wound around the shaft 21 of the rotating brush 16. Reference numeral 22 indicates various electrical components 2 for controlling the rotation of the electric motor 18.
3,23'. Reference numerals 24 and 24' are notches for introducing outside air formed in the lower case 11, and have filters 25 and 25' inside, respectively. Reference numeral 15 has support holes A26 inside at both ends.
Convex bearings A, B28, 29 with support holes B27 and
This convex bearing A, B28, 29
are rotatably supported in bearing holes A, B 30, 31 of the upper and lower cases 12, 11. Further, the fitting part 32 provided at the other end of the elbow 15 is fitted with the pipe 9, and the outside air is exhausted from the floor brush 10 to the pipe 9, the hose 6, the dust collection chamber 4, the electric blower 2, and further as shown by the arrow. It is configured to flow out from the mouth 5. A light emitting diode 33 is supported in a support hole A26 and has an outside air passage hole A34 around it, and a light emitting diode 35 is supported in a support hole B27 and has an outside air passage hole B36 around it as described above. This photodiode is formed to receive light emitted from the light emitting diode 33.

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 stepped down. At this time, the switch terminal 39 inside the transformer relay 38 is attracted by the relay.
When the voltage is turned on, the motor 18 on the primary circuit side is rectified by a diode bridge 40, and further reduced in voltage by a resistor 41 and operated through a relay 42'. That is, the brush 16 rotates.

Further, 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, if 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, and the output becomes small. As a result, transistors 45 and 46 connected to the base of photodiode 35 are turned off, transistors 47 and 48 are turned on, and light emitting diode 49, which serves as a display section, is lit. Furthermore, a motor control relay 42 connected in series with the light emitting diode 49 is also energized, and this relay 42 switches the relay switch 42', which is connected in series to the resistor 41 and the motor 18 on the primary side, to the non-resistance circuit side 50. This improves the rotation of the electric motor 18. 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 the rotation speed of the rotary brush 16 of the floor brush 10 is increased 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, suction is applied to a dirty floor surface. It is designed to make the air bigger.

Furthermore, FIG. 9 shows that 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 with the light emission of the light emitting diode 49, so that both electric motors 2 and 18 are
It is designed to improve the power of.

It goes without saying that the motors 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 in a non-resistance circuit. If the floor brush 10 is connected in series to the side 50, the functions of the floor brush 10 will be further enhanced. Also, these indicator lamps are shown in Figure 8.
It goes without saying that the same effect can be obtained even if the structure shown in FIG. 9 is installed.

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 facing both axes that are the rotation centers of the elbow, dimensional accuracy and electrical connection are facilitated, and the cleanliness display of sucked dust is improved.

In addition, this invention forms a gap communicating with the outside air in the period of the dust detector, so the outside air constantly enters and prevents dust from adhering to the detector, which improves the accuracy of the detector. .

[Brief explanation of drawings]

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 and 7 are ventilation pipes, 10 is a floor brush, 15 is an elbow, 16 is a rotating brush, 18
is an electric motor, 28 and 29 are shafts, and 33 and 35 are dust detectors. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A floor brush that has a vacuum cleaner body with a built-in electric blower and a dust collection chamber, a floor brush body, and an elbow that is rotatably supported by the floor brush body via a hollow bearing that projects outward. , a light-emitting part comprising a ventilation pipe having one end communicating with the dust collection chamber and the other end communicating with the elbow, and located in the bearing part formed on both end sides of the elbow supported by the floor brush body. and a light-receiving part, and is equipped with a dust detector for optically detecting dust, and the bearing part has an opening through which incoming air passes from other than the suction port. Machine.