JPH0548688B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dust detector device for a vacuum cleaner, which is 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, 1988, the following is a list of 10 to 10
This will be explained with reference to FIG.

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).
01, and a photodiode 102 is provided in the upper case 110 opposite to this light emitting diode 101.
The light from the light emitting diode 101 is received.
This photodiode 102 is connected to the suction air path 1 during cleaning.
If a large amount of dust is contained in the airflow flowing through the photodiode 101, the light from the light emitting diode 101 is blocked by the dust, and the amount of light received by the photodiode 102 is reduced, resulting in a small output. As a result, the transistor 103 connected to the base of the photodiode 102 shown in FIG. 10 is turned off.
This turns off the next stage transistor 104.
The transistors 105 and 106 are turned on, and the light emitting diode 107, which serves as a 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, so that the transistors 103 and 104 turn on, and the transistor 105 turns on.
When the light emitting diode 106 turns off, the light emitting diode 107 turns off.This turning off of the light emitting diode 107 indicates that there is no more dust to be sucked, and the cleaning is completed.

[Problem to be solved by the invention]

However, such conventional dust detection devices only indicate the amount of dust being sucked, and do not specifically control the rotation of the electric motor built into electric blowers or floor brushes to improve their cleaning performance. Nakatsuta.

In view of the above-mentioned problems, the present invention enables a vacuum cleaner to capture dust sucked in by a floor brush, and controls the rotation of an electric blower built into the main body or an electric motor built into the floor brush, thereby achieving more efficient cleaning performance. The purpose is to obtain.

[Means to solve the problem]

The vacuum cleaner according to the present invention is rotatable through a vacuum cleaner body that includes an electric blower and a dust collection chamber, a floor brush body, and a hollow bearing portion that projects outward from the floor brush body. a floor brush having a supported elbow; an electric motor provided within the floor brush body for driving the floor brush; and a light emitting device located within the bearing portions formed at both ends of the elbow supported by the floor brush body. A dust detector that optically detects dust, comprising a part and a light receiving part, and a display part that controls power supply to the electric blower in response to the detection results of the dust detector and displays the detection results. The electric motor is provided with a control circuit that generates a signal, the electric motor is provided on one end side of the elbow, and the control circuit is provided on the other end side.

The vacuum cleaner of this invention controls the rotation of the electric motor and electric blower in conjunction with the operation of the dust detector, so it can efficiently clean dirty floors with high power and clean them relatively cleanly. It can be cleaned with low power.

[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 the electric blower 2, and an exhaust port 5 on the downstream side;
Reference numeral 6 is a flexible hose having one end detachably attached to the suction port 3 and the other end having a main body switch 7 and a gripping portion 8, and 9 and 9' having one end attached to the gripping portion 8 and the other end thereof. The extension pipes are supported so as to fit freely into floor brushes 10, which will be described later. Reference numeral 10 denotes 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.
2 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 the electric motor 18. This is a board having various electrical parts 23, 23' for controlling the rotation of the motor. Reference numerals 24 and 24' are cutouts 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 and support holes B27 at both ends thereof. The elbow has convex bearings A, B28, 29, and the convex bearings A, B28, 29 are rotatable.
A fitting part 32 supported by the bearing holes A, B 30, 31 of the lower cases 12, 11 and provided at the other end of the elbow 15 is fitted with the pipe 9, and the outside air flows through this floor as shown by the arrow. It is configured to flow from the brush 10 to the pipe 9, the hose 6, the dust collection chamber 4, the electric blower 2, and further to the exhaust port 5. 33 is supported in a support hole A26 and has an outside air passage hole A34 around it.A light emitting diode 35 that emits light is supported in a support hole B27 and has an outside air passage hole B36 around it as before. The light emitting diode 33 is a photodiode that receives 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 reduced. At this time, the switch terminal 39 inside the transformer relay 38 is turned on. adsorbed 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, which serves as a display section, lights up. Furthermore, the relay 42 connected in series with the light emitting diode 49 is also energized, and by this relay 42, the relay switch 42' connected in series with the resistor 41 and the motor 18 on the primary side is switched to the non-resistance circuit side 50. 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 dirt on the floor to the user, and to improve the cleaning performance of the rotating brush 16 of the floor brush 10. Increase numbers.

Furthermore, 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 air is supplied to the dirty floor surface. It was designed to make it larger.
The figure shows a system in which the rotation of the electric blower 2 in the main body 1 and the electric motor 18 in the floor brush 10 are simultaneously controlled in conjunction with the light emitted by the light emitting diode 49, thereby increasing the power of both electric motors 2 and 18 on a dirty floor surface. This is what I did. 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 to the non-resistance circuit side. 5
0, the functionality 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 facing both axes that are the rotation centers of the elbow, dimensional accuracy and electrical connection are also possible, and the cleanliness display of sucked 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.

Further, the detection result of the detection unit can be notified to the user.

Furthermore, since the control circuit is provided separately from the electric motor, it is not affected by the heat generated by driving the electric motor, and can perform reliable control.

[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. be. 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, 16 is a rotating brush, 18 is an electric motor, 33,
35 is a dust detector. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A floor that has a vacuum cleaner body with a built-in electric blower and a dust collection chamber, a floor brush body, and an elbow rotatably supported by the floor brush body via a hollow bearing that projects outward. a brush, an electric motor installed in the floor brush body to drive the floor brush, 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 dust detector that optically detects dust and includes a light emitting part and a light receiving part located in the bearing part formed in the part; and controlling power supply to the electric blower in response to the detection result of the dust detector. and a control circuit that generates a control signal to a display unit that displays the detection results, the electric motor being provided at one end of the elbow, and the control circuit being provided at the other end of the elbow. .