JP2625673B2 - Vacuum cleaner suction tool - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for a vacuum cleaner having a rotary brush effective for cleaning carpets and the like.

2. Description of the Related Art A conventional suction tool of this type has a structure as shown in FIG. 4, for example, as shown in Japanese Patent Application Laid-Open No. 57-180929. That is, the suction tool main body 1 is provided with a turbine 2 that rotates by suction air and a rotating brush 3 that works in conjunction with the turbine 2, and an air flow that drives the turbine 2 is:
In general, the switching lever 4 adjusts the opening area of the ventilation port 5 to increase or decrease, and the switching lever 4 is generally set according to the general type of the surface to be cleaned (carpet, floor, folding, etc.). The number of rotations of the rotating brush was changed according to each setting.

Problems to be Solved by the Invention However, with such a structure, it is difficult to determine whether or not an ideal rotation speed of the rotating brush 3 is obtained while the actual cleaning operation is continued. However, there is a problem that an inefficient cleaning operation may be performed. This is for the following reasons. In other words, the switching lever 4 has several stages of switching according to the type of the general surface to be cleaned, and the switching lever 4 is not used to adjust the actual use state. Even if the switching lever 4 is set at the "carpet" position, the load applied to the rotating brush 3 and the number of rotations differ depending on the type of carpet and the state of the surface. But,
Even if an attempt is made to appropriately adjust the rotation of the rotating brush 3 by using a vacuum cleaner having a strong suction force and a suction port capable of freely adjusting the opening and closing of the ventilation port 5, the number of rotations is difficult to measure easily. Was something. Therefore, there is a problem that the turbine 2 is damaged or worn when the rotation speed is higher than the rotation speed (3000 to 4000 rpm) considered appropriate for normal cleaning, and the dust collection efficiency is reduced when the rotation speed is low. The problem could not be dealt with as a user. In addition, it is not possible to detect a decrease in the number of revolutions of the rotary brush 3 due to a decrease in the suction force of the cleaner body, a decrease in cleaning efficiency due to an incorrect switching of the switching lever 4, and a failure of the suction tool itself. And so on.

The present invention solves such a problem, and detects and displays the number of revolutions of the turbine and the rotating brush, informs a user of a state in which the suction tool is used efficiently, and enables proper use. The purpose is to do so.

Means for Solving the Problems In order to solve the above problems, the present invention provides a suction tool main body, a turbine rotated by suction air, a rotating brush linked to the turbine, and a generator linked to the turbine or the rotating brush. And a storage battery charged by the output of the generator, and an electric circuit for detecting the magnitude of the output of the generator, and a plurality of indicator lamps for displaying the magnitude of the output detected by the electric circuit. It is arranged on the suction tool main body.

Operation According to the above configuration, when the cleaner body is operated, the suction air flows through the suction tool to rotate the turbine, and the rotating brush and the generator linked to the turbine also start rotating, thereby generating the power. The output of the machine charges a storage battery connected to the generator. Then, a current also flows in a shunt circuit connected in parallel with the storage battery, and since this current is a current having a magnitude corresponding to the number of revolutions of the turbine and the rotating brush, both ends of a resistor inserted in series with the shunt circuit are connected. A voltage corresponding to the rotation speed is generated, and this voltage is compared with a reference potential of a comparison circuit configured by using the storage battery as a driving source, so that the level of the rotation speed of the rotating brush and the turbine can be detected. In addition, a plurality of indicator lamps disposed on the suction tool main body blink on and off according to the output of the comparison circuit, so that the user can determine the rotation speed of the turbine and the rotating brush. In this case, since a storage battery is used as a driving source of the electric circuit, a display with high display accuracy and high operation stability can be obtained.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 6 denotes a suction device main body, in which a turbine 7 and a rotating brush 8 which are rotated by suction air are built in so as to be interlocked with each other by a belt 9, and the turbine 7 is rotated by a switching lever 10. The ratio of the opening of the ventilation port 11 through which the suction air flows through and the opening of the suction port 12 that sucks the air without passing through the turbine 7 can be freely adjusted. The small DC generator 13 is arranged so as to be linked with the turbine 7 via a belt 14, and its output is connected to a circuit section 16 including a storage battery 15.

The circuit section 16 is configured as shown in FIG.
That is, the storage battery 15 is connected to both ends of the generator 13 via the diode 16a, and in parallel with the storage battery 15, a circuit in which a resistor 16b and a capacitor 16c are connected in series is connected, and a zener diode is connected in parallel with the capacitor 16c. 16d is connected. Further, comparators 16e, 16f, 16g are respectively connected between both ends of the Zener diode 16d, and one of the input terminals of these comparators is provided with a voltage dividing resistor 16h, 16i, 16j for dividing the voltage of the Zener diode 16d. , 16k are connected to each other as a reference voltage, and the other terminal is connected so that the voltage at the connection point of the resistor 16l and the resistor 16m connected in series between both ends of the generator 13 is input in parallel. ing. Also, the comparator 16
e, 16f, 16g each output is connected to the cathode of a light emitting diode 16n, 16o, 16p, and these light emitting diodes 16n, 16g
o, 16p is a resistor 16q on the cathode side of the Zener diode 16d
Are connected in series in the forward direction in the order of 16p, 16o, 16n. Further, these light emitting diodes 16n, 16o, 16p are arranged so that blinking can be confirmed from the display unit 17 on the suction tool main body 6, as shown in FIG.

The operation of the above configuration will be described. First, when the main body of the vacuum cleaner is operated, the turbine 7 is rotated by the air flowing from the vent 11. With this rotation, the rotating brush 8 and the generator 13 rotate, and an output is generated in the generator 13 so that the storage battery
Simultaneously with charging of 15, a current flows through the resistors 16l and 16m of the shunt circuit, and a comparison voltage corresponding to the output of the generator 13 is generated at both ends of the resistor 16m. A voltage whose upper limit is defined by the Zener diode 16d is generated at both ends of the capacitor 16c, and at the same time, the reference potential of the comparators 16e, 16f, 16g is given by the resistors 16h, 16i, 16j, 16k. At this time, the reference potential is connected to the + terminal of each of the comparators 16e, 16f, and 16g, and the comparison voltage of the shunt circuit is connected to the-terminal. When the comparison potential is lower than any reference potential, the outputs of all the comparators 16e, 16f, and 16g rise to the potential on the cathode side of the Zener diode 16d, that is, the power supply voltage.
No voltage is applied to n, 16o, and 16p, and all are turned off. Next, when the comparison voltage is higher than the reference potential of the comparator 16g and lower than the reference potential of the comparator 16f, only the output of the comparator 16g is output.
The voltage drops to around 0V, and only the light emitting diode 16p lights up. Similarly, the light emitting diodes 16o and 16n are sequentially turned on as the comparison potential increases, and are sequentially turned off when the comparison potential drops. The reference potential corresponds to the output of the generator 13, that is, corresponds to the rotation speed of the turbine 7. The light-emitting diodes are sequentially turned on when the rotation speed is increased, and are sequentially turned off when the rotation speed is decreased. The diode 16a prevents the current from flowing back to the generator 13 and the shunt circuit.

Here, the correspondence between the lighting of the light emitting diodes 16n, 16o, 16p and the rotation speed of the turbine 7 can be arbitrarily set by setting the resistors 16h, 16i, 16j, 16k, 16l, 16m. Therefore, when two light emitting diodes are turned on, When "optimal" 1 light, "low" 3 light,
The user can confirm that the rotation of the rotating brush 8 is "high", and the rotation speed can be set to the optimum rotation speed by adjusting the switching lever. It can also be checked whether the rotating brush 8 is rotating.

In the above embodiment, an example using a DC generator has been described. However, the same effects as those of the above embodiment can be obtained by using an AC generator and using a rectifier circuit or the like. .

Effect of the Invention As described above, according to the present invention, since the generator is used for detecting the number of revolutions, it is not necessary to replace the battery and supply power from a source other than the suction tool, and to confirm the extremely high display called the indicator lamp. Can display the rotation speed level in actual use of the rotating brush in an easy-to-use form, so that a small and lightweight display function with a high display effect can be provided at a low cost, and thereby the user can easily check the actual cleaning state. It can be grasped and adjusted to a more appropriate state, so that efficient cleaning can be facilitated, and at the same time, the suction power is reduced due to dust in the vacuum cleaner body, and the malfunction of the suction tool is detected early, and cleaning is performed. It can promote effective use of the machine itself.
In addition, since the state of the surface to be cleaned where the load is particularly large and the use of the turbine-type rotating brush is inappropriate can be detected, it is also useful for preventing a failure of the suction tool.

In particular, in the present invention, since a storage battery is used as a power supply, a stable circuit operation can be obtained, and highly accurate detection can be performed. Even if the storage battery used has a very small capacity, it can be charged in a short time after the start of use. Furthermore, if a large-capacity storage battery is used, it is possible to operate another mechanism, for example, the switching lever by using another electric motor together with the display, and to reduce the number of parts by performing power supply and detection with one generator. As a result, the failure of the circuit itself is reduced.

[Brief description of the drawings]

1 is a sectional view of a suction device of a vacuum cleaner showing an embodiment of the present invention, FIG. 2 is a circuit diagram thereof, FIG. 3 is a perspective view of the suction device, and FIG. 4 is a conventional suction device. FIG. 6 Suction tool body, 7 Turbine, 8 Rotary brush, 13 Generator, 16e, 16f, 16g Comparator, 16n, 16o, 1
6p …… Light emitting diode.

Claims (1)

(57) [Claims] 1. A suction tool main body includes: a turbine rotating by suction air; a rotating brush interlocking with the turbine; a generator interlocking with the turbine or the rotating brush; a storage battery charged by an output of the generator; An electric circuit for detecting the magnitude of the output of the generator; and a plurality of indicator lights for indicating the magnitude of the output detected by the electric circuit are provided on the main body of the suction tool.