JPH04122327A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To rotate a ball-shaped wheel and enable the front section of a main body to be moved to right or left when a hindrance is butted to the front section of the main body, by arranging contact circuits corresponding to respective applied-pressure detectors fitted on the left and right of the front section of the main body, and a forward or reverse rotation circuit. CONSTITUTION:When a hindrance exists under the movement of the main body 1 of a vacuum cleaner and the right hand of the main body 1 comes in contact with the hindrance and pressure is applied to a right-hand applied-pressure detector 6a, then by the applied pressure, the electric resistance value of the applied-pressure detector 6a is changed, and the degree of the contact pressure is transmitted to a right-hand contact detecting circuit 7a and is transmitted to a forward or reverse rotation circuit 8, and a motor 3 is to be rotated. In this case, when pressure to be applied to the applied-pressure detector 6a is high, then the rotational torque of the motor 3 is made higher, and when the pressure to be applied is low, then the rotational torque of the motor 3 is made lower, and controlled composition is set so that unnecessary movement cannot be generated. rotation of the motor 3 is transmitted to a ball-shaped wheel 4 from a driving shaft 5 by a frictional force.

Description

[Detailed description of the invention] Industrial applications The present invention relates to vacuum cleaners for industrial and domestic use.

BACKGROUND OF THE INVENTION A conventional vacuum cleaner will be described below. A vacuum cleaner that has a blower motor and a dust collector has a vacuum cleaner, and the hose is attached to the end of the hose that extends from the main body of the vacuum cleaner.The floor suction device is attached to the end of the hose, and the hose is routed while stroking the floor surface, and the vacuum cleaner that is connected to the hose is moved while cleaning. are doing.

Problems to be Solved by the Invention However, with the above conventional configuration, if the front of the vacuum cleaner gets caught in an obstacle when cleaning a place with many obstacles such as furniture, it is difficult to operate the hose each time. In addition, the user has to move the main body directly with his or her child to pull it away from obstacles, which has the problem of poor cleaning efficiency and operability.

The present invention solves the above-mentioned conventional problems, and aims to provide a vacuum cleaner that can avoid obstacles in front of the vacuum cleaner being moved and has good work efficiency and operability. shall be.

Means for Solving the Problems In order to achieve this object, the vacuum cleaner of the present invention has a spherical wheel on the front part of the main body of the vacuum cleaner, and a wheel that is in contact with the spherical wheel and parallel to the center line in the direction of travel. It is equipped with a drive shaft arranged so that the drive shaft and an electric motor are connected to the drive shaft, pressurizing force detectors installed on the left and right sides of the front of the main body, and contact circuits corresponding to each of the pressurizing force detectors. , has a configuration including a forward/reverse circuit.

Function: With this configuration, if an obstacle hits the front of the vacuum cleaner while cleaning by routing the hose, the
The front part of the main body is moved to the right or left by rotating the spherical wheels based on the pressure detected by the pressure sensor.

EXAMPLE An example of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, a main body 1 of the vacuum cleaner including a blower motor and a dust collector is equipped with a right wheel 2a that receives the weight of the main body 1 and passively rotates to improve mobility. and the left wheel 2b, and a spherical wheel 4 that receives the weight of the front part of the main body 1 and rotates freely when the main body 1 moves.
It is equipped with The drive shaft 5 that transmits the rotation of the electric motor 3 is
It is in contact with the spherical wheel 4 by frictional force. 9 is a support that supports the spherical wheel 4 by receiving it by friction.The spherical wheel 4 is made of hard urethane rubber, the support 9 is made of Teflon (trademark of DuPont), and the surface of the drive shaft 5 is made of soft urethane rubber. Coated with urethane rubber.

A right pressurizing force detector 6 made of conductive rubber is attached to the front of the main body 1 and detects changes in electrical resistance due to pressurizing force.
a and the left pressure sensor 6b have a large electrical resistance value when no pressure is applied, and a small electrical resistance value when pressure is applied, so that the magnitude of the pressure force can be replaced by the magnitude of the electrical resistance value. There is. Reference numeral 10 denotes a hose, the tip of which is equipped with a floor suction device, etc., and the user moves the main body 1 on the floor 11 by routing the hose. The right side contact detection circuit 7a and the left side contact detection circuit 7b determine whether or not they have hit an obstacle based on changes in electrical resistance values from the right side pressurizing force detector 6a and the left side pressurizing force sensor 6b, respectively, and Hitting an obstacle II! (Whether it hits strongly or weakly).

Reference numeral 8 denotes a forward/reverse circuit which determines the direction and speed of rotation of the electric motor 3 based on signals from the right side contact detection circuit 7a and the left side contact detection circuit 7b.

The operation of the vacuum cleaner configured as above will be described below. When there is an obstacle while moving the main body 1 of the vacuum cleaner, and the right side of the main body 1 comes into contact with the obstacle, and pressure is applied to the pressure force detector 6a on the right side, the pressure sensor 6a is detected by the pressure force. The electrical resistance value of 6a changes, and the amount of contact force is transmitted to the right contact detection circuit 7a.
It is further transmitted to the forward/reverse circuit 8 to rotate the electric motor 3. At this time, if the force applied to the pressurizing force detector 6a is large, the rotational torque of the electric motor 3 is increased, and if the applied force is small, the rotational torque of the electric motor 3 is decreased, so that the configuration is controlled to prevent unnecessary movement. There is. Electric motor 3
The rotation is transmitted from the drive shaft 5 to the spherical wheel 4 by frictional force. Since the drive shaft 5 is disposed parallel to the axis of movement of the main body 1, when the rotation of the drive shaft 5 is transmitted to the spherical wheels, the direction of rotation of the spherical wheels 4 is such that the front part of the main body 1 is directed to the left or to the left. When the movement is to the right and the front part of the main body 1 is swung to the left and the right pressing force sensor 6a moves away from the obstacle, the electrical resistance value increases and the series of operations ends and stops.

According to this embodiment as described above, the vacuum cleaner is equipped with pressurizing force detectors attached to the left and right sides of the front of the main body, corresponding pressurizing force detectors, and a forward/reverse circuit. By installing a spherical wheel on the bottom of the vacuum cleaner that is rotated by an electric motor connected to a drive shaft, when the front of the vacuum cleaner hits an obstacle such as furniture, it moves in a direction to avoid the obstacle, and it also moves away from the obstacle. If there is strong contact, the rotational torque of the electric motor can be increased to completely avoid the obstacle. Therefore, the user only needs to pay attention to the floor surface and route the hose. , it is possible to improve work efficiency and operability when cleaning.

Effects of the Invention As is clear from the description of the embodiments above, the present invention has a spherical wheel at the front of the main body of the vacuum cleaner, which is in contact with the spherical wheel and parallel to the center line in the direction of movement of the main body. It has a drive shaft arranged like this and an electric motor connected to the drive shaft,
The configuration includes pressurizing force detectors attached to the left and right sides of the front of the main unit, contact detection circuits corresponding to each of the pressurizing force detectors, and a forward/reverse circuit, allowing the main unit to avoid obstacles. This makes it possible to realize an excellent vacuum cleaner that can improve work efficiency and operability.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a vacuum cleaner according to an embodiment of the present invention;
The figure is a block diagram showing the control system of the vacuum cleaner, and FIG. 3 is a conceptual diagram showing the configuration of the spherical wheels of the vacuum cleaner. 1...Body, 3...Electric motor, 4...
... Spherical wheel, 5 ... Drive shaft, 6a, 6b.
...Pressure detector. Name of agent Patent attorney Haruaki Koebi and 2 others

Claims (1)

[Claims] A vacuum cleaner having an air blower motor and a dust collector, wherein a spherical wheel is provided at the front of the main body of the vacuum cleaner, and a spherical wheel is provided in contact with the spherical wheel and parallel to a center line in the traveling direction of the main body. A drive shaft provided therein, press force detectors each having an electric motor connected to the drive shaft and attached to the left and right sides of the front part of the main body, and a contact detection circuit corresponding to each of the press force detectors; A vacuum cleaner equipped with a forward and reverse circuit.