JPH03264022A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To improve the operation performance even if a suction port is large, by allowing either a front wheel or rear wheel to make contact with either a counter roller or motor rotary shaft through their forward/rearward movement. CONSTITUTION:Inside a floor nozzle body 11, a front wheel 13 and a rear wheel 14 whose mutual positions are fixed by a connecting tool 15 are installed. When a floor nozzle main body 11 is moved forward, a counter roller 17 makes contact with the front wheel 13, and a counterclockwise turning force is applied on the front wheel 13, and the floor nozzle body 11 advances. When the floor nozzle body 11 is pulled rearward (to this side, viewed from a user's side), a motor rotary shaft 16 makes contact with the rear wheel 14, and a clockwise tuning force is applied on the rear wheel 14, and the floor nozzle body 11 retreats.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner equipped with a floor nozzle (floor suction tool) that is smooth against the floor and has good operability.

BACKGROUND OF THE INVENTION In recent years, the suction power of vacuum cleaners has increased, and the time required for vacuum cleaners has become shorter.

Although not shown in the drawings, many conventional vacuum cleaners have a shape in which the brushed lip of the floor nozzle is in contact with the floor surface, and no means are taken to separate the lip of the floor nozzle from the floor surface. Ta.

Problems to be Solved by the Invention However, as the suction power of a vacuum cleaner increases, the suction power of the floor nozzle on the floor also increases, resulting in a problem in that the floor nozzle does not slide smoothly, resulting in poor operability. Was.

The present invention solves these problems, and aims to provide a vacuum cleaner equipped with a floor nozzle that is easy to operate even with a large suction force.

Means for Solving the Problem In order to solve this problem, the vacuum cleaner of the present invention includes a motor within the main body of the floor nozzle, and front and rear wheels of the same diameter that are movable freely in the direction of rotation of the motor. By driving the front and rear wheels in the longitudinal direction, one of the front and rear wheels is brought into contact with the counter roller and one of the rotating shafts of the motor.

With this configuration, when the floor nozzle is pushed forward, the front wheel comes into contact with the counter roller that is in contact with the motor rotating shaft, and the front wheel rotates, so the floor nozzle body moves forward, and the floor nozzle is pulled back. Then, the motor rotating shaft rotates in contact with the rear wheel, and the floor nozzle body moves rearward.

EXAMPLE An example of the present invention will be described below with reference to the drawings. Figure 1 shows the floor nozzle part of an embodiment of the vacuum cleaner of the present invention. Specifically, Figure 1 (a) shows an example when the vacuum cleaner is stopped, and Figure 1 (b) shows an example when the floor nozzle moves forward. This is a floor nozzle body equipped with a connected extension pipe 12. Inside the floor nozzle body 11, there is a front wheel 13 whose mutual position is fixed by a connecting tool 16, a constant distance is maintained in the front and rear of the running direction, and the front wheel 13 is movable in the front and rear directions within the floor nozzle body 11. A rear wheel 14 is provided. Further, a motor (not shown) and a motor rotation shaft 16 are provided in the floor nozzle main body 11, and a counter roller 17 is brought into contact with the motor rotation shaft 16. Note that the counter roller 17 is the floor nozzle main body 1.
1 is rotatably provided. Further, the front wheel 13, the rear wheel 14, and the counter roller 17 have the same diameter.

FIG. 2 shows the relationship between the motor rotation shaft 16 and the motor 2o, and a clutch 19 is provided between them.

The operation of the vacuum cleaner configured as above will be described below.

First, the motor rotation shaft 16 is constantly rotating in a counterclockwise direction. Therefore, the counter roller 1, which is in contact with the motor rotating shaft 16, always rotates clockwise.

Here, when the user moves the floor nozzle body 11 forward,
As shown in FIG. 1(b), the counter roller 17 and the front wheel 13
When the front wheels 13 come into contact with each other, a counterclockwise rotational force is applied to the front wheels 13, and the floor nozzle main body 11 moves forward. Next, when the floor nozzle main body 11 is pulled rearward (frontward as seen from the user), the motor rotation shaft 16 and the rear wheel 14 come into contact with each other, and the rear wheel 1
4, when a clockwise rotational force is applied, the floor nozzle main body 11 moves backward. Even if the floor nozzle body 11 stops with the motor rotation shaft 16 and the rear wheel 14 or the counter roller 17 and the front wheel 13 in contact, a clutch 19 is provided between the motor 20 and the motor rotation shaft 16. Therefore, the clutch 19 absorbs the energy, and the motor rotation shaft 16 and the rear wheel 14, or the counter roller 1 and the front wheel 1.
It is possible to prevent wear at the contact point with 3.

Although the clutch 19 is not shown in detail, for example, the input shaft (motor side) and the output shaft (motor rotating shaft side) are provided with disks that oppose each other and are sealed together with a highly viscous liquid such as silicone oil. When the load on the output shaft side is small, both the input and output shafts rotate at the same rate, but when the load on the output shaft side becomes large, the rotation transmission between the input and output shafts is cut off. Further, the clutch 19 may be a mechanical one, and in any case, a clutch that absorbs a small amount of energy may be used.

Furthermore, a counter roller 17, a front wheel 13 and a rear wheel 14
By making them have the same diameter, it is possible to make the moving speed in the front-back direction the same.

Effects of the Invention As is clear from the description of the embodiments above, the vacuum cleaner of the present invention includes a motor in the floor nozzle main body, a counter roller in contact with the motor rotation shaft, and a front wheel and a rear wheel connected in a front-back relationship. The front wheel and the rear wheel connected to each other move independently back and forth within the floor nozzle body to rotate in contact with either the counter roller or the motor shaft. The back and forth movement is aided by the rotational force of the motor, so even if the suction force is strong, the floor nozzle can be moved easily. Furthermore, by providing a clutch between the motor and the motor rotation shaft,
Even if the wheel, counter roller, and motor rotation shaft are stopped in contact with each other, wear of the mutual contact points can be prevented.

Furthermore, by making the counter roller and the wheel the same diameter, the moving speed in the front and rear direction can be made constant, which has a great practical effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a floor nozzle of a vacuum cleaner according to an embodiment of the present invention, and FIG. 2 is a schematic side view showing the relationship between a motor and a clutch in the floor nozzle. 11...Floor nozzle body, 13...Front wheel, 14...Rear wheel, 16...Connection tool, 16...Motor rotation Shaft, 17...Counter roller, 19...Clutch, 2o...
···motor.

Claims (3)

[Claims] (1) A motor in the floor nozzle body, a counter roller that rotates in contact with the motor rotation axis, and a connecting device that maintains a constant distance in the front and back of the running direction and that can move freely in the front and back direction. A vacuum cleaner comprising a front wheel and a rear wheel, the front wheel and the rear wheel moving back and forth so that one of the wheels comes into contact with a counter roller and one of a motor rotating shaft. (2) The vacuum cleaner according to claim 1, further comprising a clutch provided between the motor and the motor rotating shaft. (3) The vacuum cleaner according to claim 1, wherein the counter roller has the same diameter as the wheel.