JPS61238221A - Floor nozzle for 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 floor nozzle for a vacuum cleaner with rotating brushes.

Conventional technology In this type of conventional floor nozzle, the floor nozzle body connected to the suction side of a vacuum cleaner has a suction chamber with a rotating brush inside and a turbine chamber with an air turbine inside. However, these two chambers are connected through a vent.

When a vacuum cleaner is operated, the suction force causes air to flow from the suction chamber to the ventilation chamber to the turbine chamber, causing the air turbine to rotate.

This rotation is then transmitted to the rotating brush via a power transmission means such as a belt.

Another method is the so-called electric brush type, in which a rotating brush drive electric motor is placed inside the floor nozzle body, and a power cord is wired from the outlet provided in the vacuum cleaner body to the outer circumference of the hose extension tube to drive the rotating brush. There is a floor nozzle.

Problems to be Solved by the Invention In the case of the former air turbine type floor nozzle, the rotational force of the rotating hook is generated by the air flowing in through suction rotating the air turbine. When this decreases, the flow velocity of the air hitting the air turbine decreases, and the output of the rotating brush also decreases.

In this case, the rotating brush may not be able to rotate due to the resistance of the carpet.

In addition, an air turbine is placed in the middle of the inflow path, and the air turbine is rotated by the suction force, so it can only be used with a vacuum cleaner with a large suction force. There is a problem with consuming it.

Another problem is that the air turbine makes very noisy noise when it rotates.

In addition, in the case of the latter electric brush type floor nozzle, connect the wiring that sends current to the electric motor inside the floor nozzle from the outlet installed in the vacuum cleaner body, and attach it to a hose or extension pipe with a hook. In most cases, this wiring work is very troublesome in preparation for cleaning and cleaning up after cleaning.

In addition, this electric brush type floor nozzle was devised for serious carpet cleaning, and since it drives a large rotating brush, the electric motor is also large, and the entire floor nozzle is large, making cleaning operations easier. It was extremely difficult.

Furthermore, in both types, the rotational speed of the rotating brush fluctuates depending on the load on the floor and the suction force of the cleaner body, making it impossible to obtain the optimum rotational speed depending on the floor surface.

On the other hand, in the case of carpets, etc., the optimum rotation speed for dust collection performance is around 40 oOrpm, and designs have been made to get as close to this as possible.

The present invention solves these conventional problems and provides a floor nozzle that is easy to use and has excellent performance.

Means for Solving the Problem The technical means of the present invention for solving this problem is to install an electric motor and a battery as a power source in the floor nozzle body, and to detect the rotation of the rotating brush using a rotation speed detection circuit. It detects this and activates the motor control circuit.

action The effect of this technical means is as follows.

That is, when the floor nozzle body is placed on the surface to be cleaned and the cleaner body is operated, the rotational speed of the rotating brush fluctuates due to resistance of the surface to be cleaned. The rotational speed detection circuit senses this change, changes the output of the motor control circuit, and performs feedback control so that the rotating brush always reaches the set rotational speed.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIGS. 1 and 2, 7 is a floor nozzle body constructed by connecting upper and lower body members 8°9 through a bumper 10;
A suction chamber 12 with a built-in rotating brush 11 is formed in front of it, and a battery 13 and an electric motor 14 are located behind it.
are arranged approximately symmetrically. Reference numeral 15 denotes a substantially semi-cylindrical connection case, which is disposed at the rear center of the suction chamber 12 and connected to the upper and lower main body members 8 and 9 so as to be able to rise and fall. A connecting vibrator 16 is rotatably connected to the opening of the connecting case 15, and is connected to the suction side of the vacuum cleaner. 17 is electric motor 1
It is a power shaft that takes out the rotational force of 4, and there is a 7'-U-1 at the tip.
8 is installed. A belt 20 is looped from the boot U-18 to a pulley 19 attached to one end of the rotating brush 11, thereby transmitting the driving force.

21 is a bearing provided at both ends of the rotating brush 11, and 22 is a switch for operating the electric motor 14. 23 is a rotation speed detection circuit that detects the rotation speed of the rotating brush 11.

A control circuit 24 controls the output of the electric motor 14, and controls the output of the electric motor 14 in response to the output signal of the rotation speed detection circuit 23, so that the rotation speed of the rotating brush 11 is approximately 4000 rpm.

That is, when the material of the surface to be cleaned changes and the load increases and the rotation speed of the rotating brush 11 decreases, the rotation speed detection circuit 23 senses this decrease in the rotation speed and increases the output of the electric motor 14. A signal is sent to the control circuit 24. When the load decreases, the opposite effect occurs and the number of revolutions of the rotating brush 110 is kept constant.

To clean, connect the floor nozzle body 7 to the vacuum cleaner body,
At the same time, the user operates the switch 22 on the floor nozzle body T to rotate the rotary brush 11 and perform cleaning.

In the case of a surface to be cleaned such as a carpet, the rotating brush 11 scrapes up the dust and the suction force of the vacuum cleaner body sucks up the dust.

As a result, the rotation of the rotary brush will also decrease due to the decrease in the suction force of the vacuum cleaner itself, and the performance deterioration will no longer occur, and the suction force of the turbine (1:+2) will no longer be affected. Even a vacuum cleaner body with low performance can provide sufficient cleaning performance, and since the noise generated by the turbine is eliminated, a quiet floor nozzle can be obtained.

In addition, a floor nozzle that does not require wiring and can be used with all current vacuum cleaners and has greatly improved carpet cleaning performance can be obtained.

Effects of the Invention As described above, the present invention drives the rotating brush with an electric motor using battery power, and achieves low noise, reduced performance loss, and no wiring, while also ensuring that the rotation speed of the rotating brush is always constant. The dust collection performance is improved by controlling the electric motor to adjust the rotation speed.

[Brief explanation of drawings]

FIG. 1 is a plan view of a floor nozzle showing an embodiment of the present invention with the upper body member removed, and FIG. 2 is a sectional view. 7... Floor nozzle body, 11... Rotating brush, 13... Battery, 14...
Electric motor, 23...Rotation speed detection circuit, 24...
...control circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person11
1!1

Claims (2)

[Claims] (1) The floor nozzle body includes a battery-powered electric motor, a rotating brush driven by this motor, a detection circuit that detects the rotation speed of the rotating brush, and a rotation speed of the motor based on the output of this detection circuit. A floor nozzle for a vacuum cleaner equipped with a control circuit for controlling the (2) Rotation speed of rotating brush 4000±1000rpm
A floor nozzle for a vacuum cleaner according to claim 1, wherein the floor nozzle has the following characteristics.