JPH04371125A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a vacuum cleaner capable or carrying out efficient cleaning by automatically obtaining optimum suction according to surfaces to be cleaned. CONSTITUTION:A detection member 22 detecting conditions of surfaces to be cleaned is set to protrude from the bottom face of a floor suction port 1 and inside the suction port 1 a slide type resistor 24 is arranged, and the detector 22, a sliding element 25 of the resistor 24 and a connection part 22a positioned at the detector 22 are interconnected so that the resistance values of the resistor 24 are varied by the up and down movement of the detector 22. A spring 23 is interposed between the detector 22 and a member 6 so that the detector 22 may always be in contact with a surface to be cleaned. When the suction port 1 is raised, the detector 22 is to protrude to the maximum from the suction port 1 and a resistance element 24a of the slide type resistor 24 and the sliding element 25 are separated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner having means for adjusting suction force.

0002

[Prior Art] Conventionally, there are various ways to adjust the suction power of a vacuum cleaner, but an inexpensive method involves manually switching a switch located at the end of the hose, and changing the resistance value of a sliding resistor installed on the switch. This was done by controlling the amount of power supplied to the dust collection motor using a phase control circuit using a triac.

[0003] When on a carpet, a strong suction force is required, so the switch is set to ``strong'', and when on the floor or tatami mats, a strong suction force is not required, so the switch is set to ``weak''.

0004

[Problems to be Solved by the Invention] It is troublesome to manually switch the switch each time depending on the surface to be cleaned. Therefore, I often used the switch with the switch set to "high". This used unnecessary electricity and was uneconomical.

[0005] Furthermore, when using a strong suction force on a floor or tatami mat, the suction force is absorbed and a strong force is required to operate the floor suction port, making it difficult to operate.

[0006]Furthermore, even when the switch is not in the cleaning state, the switch can be turned off.
In some cases, the motor is left rotating without F, which is also a waste of electricity and uneconomical.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive vacuum cleaner that automatically adjusts its suction power depending on the surface to be cleaned.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a sensor for detecting the cleaning surface on the surface of the floor suction port in contact with the cleaning surface, which is movable up and down. A sliding resistor is provided inside, and the sliding portion of this sliding resistor and the detection body are interlocked.

[0009] Then, an elastic body is interposed between the warp and the sensing body.

Furthermore, when the sensing object is separated from the surface to be cleaned, the resistance element and the slider of the sliding resistor are separated.

[0011]

[Operation] According to the above structure, the present invention can automatically obtain the optimum suction force depending on the surface to be cleaned.

Furthermore, when the floor suction port is lifted above the surface to be cleaned, the dust collection motor stops rotating.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the floor suction port of the present invention. FIG. 2 is a back view of FIG. 1. FIG. 3 is an overall view of the vacuum cleaner. FIG. 4 is a diagram illustrating the state of the detection body when cleaning a carpet. FIG. 5 is a diagram illustrating the state of the sensing body when cleaning the floor or tatami. FIG. 6 is an electrical circuit diagram of the vacuum cleaner of the present invention.

The vacuum cleaner is composed of a floor suction port 1 (hereinafter referred to as the suction port), an extension pipe 2, a hose 3, and a main body 4, and the suction port 1 is composed of a suction port main body 5, a sled 6, and a suction pipe 7. has been done. The bent pipe 8 of the hose is provided with a hand switch 9 for driving the vacuum cleaner.

A paper bag filter 12 having a check valve 10 at its suction port and a paper bag support 11 is attached to the front part of the main body 4. Paper bag filter 1 is attached to the rear of the paper bag filter.
There is an auxiliary filter 13 for collecting fine dust that has passed through the filter.

At the rear of the main body 4, there is a control board 15 having a control circuit for controlling the dust collection motor 14 and the vacuum cleaner.
16 is a cord reel for supplying the vacuum cleaner. Reference numeral 17 denotes a swivel wheel provided at the bottom of the main body, and 18 is a wheel provided on both sides of the rear part of the main body, which are used for driving the main body 4. 19 is a handle provided on the top of the main body 4 for carrying. 20 is a bumper wrapped around the suction port 1, and 21 is a wheel provided on the sled 6.

A detection body 22 is provided at the suction port 1 so as to be movable up and down on the sled 6, and a spring 23 is installed between the sled 6 and the detection body 22 so that the detection body 22 is always in contact with the cleaning surface.
is interposed. The tip of the detection body 22 has a spherical shape so that it can easily slide on the cleaning surface.

The other end of the sensing body 22 is provided with a connecting portion 22a that interlocks with the slider 25 of the sliding resistor 24 provided inside the suction port 1 to prevent the sensing body 22 from coming off the sled 6. A stopper 22b is provided.

The sliding resistor 24 is connected to the sensing body 22.
The slider 25 is attached parallel to the moving direction of the resistor element 24a, and the slider 25 slides on the surface of the resistor element 24a as the detector moves up and down.

Next, the operation of the vacuum cleaner of the present invention will be explained. When cleaning a carpet, when the suction port is run on the carpet, the sensing body 22 is pushed upward by the hair of the carpet, and the slider 25 slides the resistance element 24a in the direction of decreasing the resistance value.

When the hand switch 9 is turned on in the above state,
By the control circuit of FIG. 6, capacitor C4 is charged via sliding resistor VR, and transistors Q2 and Q1 are charged.
is turned ON, and thereby a signal is sent to the gate of the triac TRC via diodes D1 to D4, and the triac enters the ON mode and supplies power to the motor M from the power supply.
Motor M rotates.

Therefore, when the resistance value of the sliding resistor VR is the minimum, the charging time of the capacitor C4 is the minimum, that is, the time required to reach the potential that turns on the transistors Q2 and Q1 is shortened, and therefore the gate to the triac TRC is shortened. The signal is controlled, and a voltage approximately the same as the power supply waveform is applied to the motor M, resulting in maximum output and a "strong" suction force suitable for carpeting.

Next, when cleaning the floor surface, the sensing element 22 is biased by the spring as shown in FIG. It is larger than that of a carpet.

In other words, the fact that the resistance value of the sliding resistor VR is varied in a direction larger than that of a carpet means that the charging time of the capacitor C4 becomes longer, that is, it takes longer to reach the potential at which the transistors Q2 and Q1 turn on. As a result, the phase of the power waveform applied to the motor M due to the gate signal to the triac TRC is shifted, the power supply to the motor M is controlled, the output is weakened, and the suction force is reduced to "weak" suitable for the floor surface. ”.

Furthermore, when the suction port 1 is lifted from the surface to be cleaned during cleaning, the detection body 22 is urged by the spring 23 and comes out until it comes into contact with the stopper 22b provided on the detection body 22, and the slider 25 resists. Contact with element 24a is released,
The circuit is opened, power supply to the motor 14 is stopped, and the motor 14 stops rotating.

In the above case, when the suction port 1 is placed on the surface to be cleaned again, the circuit is closed and the motor 14 rotates. Note that even if the suction port 1 is lifted from the surface to be cleaned with the switch 9 in the OFF state, and the switch 9 is then turned ON, the motor 14 will not rotate due to the above structure.

As described above, the present invention replaces the conventional method of manually switching the resistance value at hand according to the surface to be cleaned by providing a detection body 22 at the suction port 1, and this detection body 22 can be moved up and down depending on the surface to be cleaned. Since it moves and thereby changes the resistance value of the sliding resistor 24 provided in the suction port 1, there is no need to manually change the switch depending on the surface to be cleaned.
The optimal suction force is automatically obtained.

Furthermore, when the suction port 1 is lifted from the cleaning surface, the motor 14 stops, so the suction port 1 rotates only when it is in contact with the cleaning surface, that is, in the cleaning state.
Wasted electricity is prevented.

It should be noted that the present invention is not limited to what has been described above, but may be applied to a floor suction port, such as a turbine brush that rotates a fan and a rotary brush provided at the suction port using suction force, or The present invention can also be used in a power brush or the like in which a rotary brush is rotated by a motor.

[0030]

Effects of the Invention As explained above, the present invention provides a detection body for detecting the cleaning surface in the suction port, and this detection body moves up and down depending on the cleaning surface, thereby increasing the resistance of the slide type resistor provided in the suction port. By changing the resistance value, the suction force corresponding to the cleaning surface can be controlled without having to manually change the switch depending on the cleaning surface, and the optimal suction force can be obtained, and it can be used without adhering to the cleaning surface. Can be cleaned.

Furthermore, since the elastic body is interposed between the sensing body and the sled, the sensing body is always urged against the surface to be cleaned, and the surface to be cleaned can be reliably detected.

Furthermore, since the motor stops rotating when the suction port is lifted above the surface to be cleaned, there is no need to turn off the switch each time when the suction port is placed horizontally during cleaning. Also, no electricity is used unnecessarily.

As described above, according to the present invention, the optimum suction force for the surface to be cleaned can be automatically obtained by simply moving the suction port over the surface to be cleaned, and the operation of the vacuum cleaner can be automatically achieved by lifting the suction port from the surface to be cleaned. This provides a practical and economical vacuum cleaner that shuts down automatically.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a suction port of the present invention.

FIG. 2 is a back view of FIG. 1 as well.

FIG. 3 is an overall view of the vacuum cleaner of the present invention.

FIG. 4 is a diagram illustrating the state of the detection body when cleaning the carpet in FIG. 3;

FIG. 5 is a diagram illustrating the state of the sensing body when cleaning the floor or tatami in FIG. 3;

FIG. 6 is an electrical circuit diagram of the vacuum cleaner of the present invention.

[Explanation of symbols]

1 Suction port 9 Switch 14 Dust collection motor 22 Detection object 22b Stopper 23 Spring 24　Sliding resistor 24a Resistance element 25 Slider

Claims (3)

[Claims] Claim 1. In a vacuum cleaner having a control device that changes the resistance value of a sliding resistor and controls suction force, a floor suction port of the vacuum cleaner is provided with a control device that is movable up and down.
1. A vacuum cleaner characterized in that a detection body for detecting a surface to be cleaned is provided, a sliding resistor is provided in the floor suction port, and a sliding part of the sliding resistor and the detection body are interlocked. 2. The vacuum cleaner according to claim 1, further comprising an elastic body provided between the detection body and the floor suction port. 3. The vacuum cleaner according to claim 1, further comprising a motor stop means for stopping the motor when the sensing body of the floor suction port moves away from the surface to be cleaned.