JPS6151885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a vacuum cleaner, and relates to a vacuum cleaner equipped with a rotating brush.

(Prior Art) Recently, with the increase in the area where floor rugs are used, vacuum cleaners specifically designed for rugs or for the main purpose of cleaning rugs have been developed.

However, in order to separate and collect dust on a carpet surface, unlike a relatively smooth surface such as a tatami surface, a strong cleaning force is required.

Therefore, conventional vacuum cleaners designed exclusively for the carpet or whose main purpose is to clean the carpet surface use an electric motor to rotate a rotating brush that is used to hit the carpet surface or scrape off the dust that has adhered to the carpet surface. It has a configuration that allows

In the above-mentioned conventional vacuum cleaner equipped with a rotary brush, the front part tends to lift up when the vacuum cleaner is operated by pushing with a handle provided at the rear of the vacuum cleaner body, causing the vacuum cleaner body to rise above the floor surface. When the rotating brush is under a light load with low rotational resistance, the rotating brush rotates at high speed, so for example, if it touches the tip of the tufts of a rug, it may cause the tufts of the rug to break. There is a risk that the curtains may be seriously damaged, the noise may become louder, and there is also the problem that curtains, etc., may be sucked in.

As a method of solving such problems, a structure as shown in FIGS. 7 and 8, for example, can be considered.
This structure houses and fixes an electric blower 2 in an electric blower chamber 3 formed at the rear of the vacuum cleaner body 1, and this electric blower chamber 3 has an air intake chamber 5 separated by a partition wall 4.
a and an exhaust chamber 5b, the exhaust side of the electric blower 2 is communicated with the exhaust chamber 5b, the exhaust chamber 5b is communicated with the outside through an exhaust port 6, and the intake chamber of the electric blower 2 is connected to the exhaust chamber 5b. 5a communicates with an inlet 7 opened on the front bottom surface of the main body 1 through an inlet 5c, and a bag-shaped dust collecting chamber 9 is formed between the inlet 7 and the inlet 5c. A filter 8 is housed in a freely insertable and removable manner, and a rotary brush 10 facing the suction port 7 of the main body 1 and in contact with the floor surface is pivoted in the left-right direction, and this rotary brush 10 is provided on the rotary brush 10. It is designed to be rotated in conjunction with the electric blower 2 by a belt 15 suspended between a pulley 13 and a pulley 14 provided on the motor of the electric blower 2, and the pulley 13 of the rotary brush 10 is provided. Rotating axis 1
6 is inserted into a shaft support hole 17 formed by a vertically long oval hole formed on both sides of the main body 1 and is supported by the shaft so as to be able to move up and down, and this rotary brush 10 is pivoted by its own weight when the main body 1 of the vacuum cleaner rises from the floor. The support hole 17 is lowered, a rotating body 19 is provided on the rotating shaft 16 of the rotating brush 10, and an actuating member 21 that engages with the engagement surface of the rotating body 19 is located above the rotating body 19 and rotates up and down. The actuating member 21 is provided so as to be movable, and is configured to open or close a limit switch 20 for controlling the electric blower 2 by vertical movement.

(Problems to be Solved by the Invention) In the structure shown in FIGS. 7 and 8 above, the rotating body 19
An operating member 2 that operates the limit switch 20 in
Since the actuating member 21 is brought into contact with the actuating member 21, there is a problem in that the actuating member 21 is easily worn out by the rotation of the rotating body 19.

The present invention has been developed in view of the above-mentioned problems.The present invention directly detects the movement of the rotary brush itself when the vacuum cleaner body is lifted off the floor, and stops the rotary brush or operates with low torque. This product does not damage the carpet by rubbing only the tips of the tufts of the carpet, and is highly durable and safe to clean with less wear and tear. The present invention provides a suitable vacuum cleaner.

[Structure of the invention]

(Means for Solving the Problems) The vacuum cleaner of the present invention includes a vacuum cleaner main body having a built-in electric motor, and a vacuum cleaner main body that is driven by the electric motor and operates in contact with a surface to be cleaned to remove dust. a rotating brush that separates the vacuum cleaner from the floor and moves downward when the vacuum cleaner main body floats above the floor, and a control circuit that controls the electric motor to reduce or stop the operating torque of the rotating brush. , a bearing part that rotatably supports the rotary brush and moves together with the rotary brush is provided in the vacuum cleaner main body so as to be movable up and down, and an operating member that is operated by the bearing part and controls the control circuit is provided in the bearing part. The present invention is characterized in that it is provided on the vacuum cleaner main body so as to face the vacuum cleaner body.

(Function) In the vacuum cleaner of the present invention, when the running device such as the wheels of the vacuum cleaner body is in contact with the floor surface, the rotating brush is brought into contact with, for example, a carpet surface, and the rotating brush is moved in conjunction with the movement of the rotating brush. The motor is driven and the rotary brush is rotated without operating the operating member of the control circuit. As the vacuum cleaner body moves, the rotating brush scrapes the floor surface and lifts dust from the floor surface.

During cleaning, when the main body of the vacuum cleaner rises above the carpet surface, the rotating brush moves downward, and the bearing of the rotating brush also moves downward to operate the operating members of the control circuit, thereby controlling the control circuit. Then, the electric motor is stopped or driven at low torque, and the rotating brush is stopped or rotated at low torque. Furthermore, when the vacuum cleaner body properly contacts the carpet surface, the rotary brush moves upward, and along with this movement, the bearing also moves upward, releasing the control operation for the control circuit of the operating body. The rotating brush rotates normally.

(Embodiment) Next, a vacuum cleaner showing an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a vacuum cleaner main body, in which an electric blower 2 as a motor is housed and fixed in an electric blower chamber 3 formed at the rear. This electric blower chamber 3 has the same configuration as that shown in FIGS. 7 and 8, and to explain FIGS.
The exhaust chamber 5b is divided into an exhaust chamber 5b, and the exhaust side of the electric blower 2 is communicated with the exhaust chamber 5b, which is communicated with the outside through an exhaust port 6. Further, the air intake chamber 5a of the electric blower 2 has an air intake port 5 that communicates with an air intake port 7 opened at the front bottom surface of the main body 1.
c is formed, and a dust collection chamber 9 is formed between the suction port 7 and the suction port 5c, in which a bag-shaped dust collection filter 8 is removably housed.

Further, a rotary brush 10 facing the suction port 7 of the main body and in contact with the floor surface is mounted on a shaft in the left-right direction.
This rotating brush 10 has brushes 1 on the circumferential surface of the rotating member 11.
2 is flocked in a spiral direction. Further, this rotary brush 10 includes a pulley 13 provided on the rotating member 11 and a pulley 14 provided on the motor of the electric blower 2.
It is designed to be rotated in conjunction with the electric blower 2 by a belt 15 suspended between the two.

Next, a bearing portion 29 rotatably supports the rotary shaft 16 provided with the pulley 13 of the rotary brush 10.
It is inserted and supported in a vertically movable manner in a shaft support hole 17 formed as a vertically elongated hole formed on both sides of the main body 1 in the vertical direction. A limit switch 20 having an operation button 21 as an operating member facing this bearing portion 29
is provided on the main body 1 above the bearing portion 29. This operation button 21 is provided on the limit switch 20 so as to be able to move up and down, and by moving the operation button 21 up and down, the limit switch 2
0 contact is turned on and off. The rotary brush 10 is designed to lower the shaft support hole 17 by its own weight when the cleaner body 1 rises above the floor surface, and in conjunction with the vertical movement of the bearing section 29, the operation button 21 also moves up and down. The limit switch 20, which serves as a control circuit for controlling the electric blower 2, is opened or closed.

Further, wheels 26, 26 are provided at the front and rear of the main body 1, and a handle 27 is provided at the rear.

Next, the operation of this embodiment will be explained.

When the wheels 26, 26 of the vacuum cleaner main body 1 are in contact with the floor surface, the rotary brush 10 is in contact with the floor surface, for example, a carpet surface, and the bearing portion 29 is located at the upper end side of the shaft support hole 17. The operating button 21 of the limit switch 20 as a control circuit is pressed upward, the limit switch 20 is closed, the electric blower 2 is driven, and the rotary brush 10 is also rotated via the belt 15. Then, as the main body 1 moves, the rotary brush 10 rubs the floor surface and lifts the dust from the floor surface, and the electric blower 2 sucks the lifted dust into the suction port 7, and the dust is transferred to the filter 8. The air is captured and passed through, and the passed air is discharged from the exhaust port 6.

When cleaning, especially when the handle 27 of the vacuum cleaner body 1 is pushed, when the body 1 rises above the floor, the bearing part 29 is moved by the weight of the rotating brush 10 into the pivot hole 17.
, and press operation button 2 of limit switch 20.
1 is released, the limit switch 20 is released, the power supply circuit of the electric blower 2 is opened, the electric blower 2 stops driving, and the rotating brush 10 also stops at the same time. Further, when the wheels 26, 26 of the vacuum cleaner body 1 come into contact with the carpet surface, the rotary brush 10 moves upward, the bearing part 29 presses the operation button 21 upward, and the limit switch 20 as a control circuit is opened. , the rotary brush 10 is rotated again.

Next, the drive circuit of the vacuum cleaner will be explained.

As shown in FIG. 3, the drive circuit includes a main switch 35 and a limit switch 20 as a control circuit connected in series with the electric blower 2, and a rotary brush 10.
By the movement of the bearing portion 29, the limit switch 20 is opened via the operation button 21 as an operating member, the electric blower 2 is stopped, and the rotating brush 10 is also stopped.

In addition, as shown in Fig. 4, the drive circuit is connected to the electric blower 2.
The main switch 35 and a changeover switch 36 as a control circuit are connected in series, and the movable contact piece 37 of the changeover switch 36 is switched by the movement of the operating member 21 to tap the winding 38 of the motor of the electric blower 2. It is also possible to sequentially switch the connected contact pieces 39, 40, and 41 to reduce the driving torque of the electric blower 2 in stages, thereby rotating the rotary brush 10 with low torque.

Furthermore, as shown in FIG. 5, a phase control circuit 43 including a thyristor 42 as a control circuit is connected to the electric blower 2, and a variable resistor 45 connected to a capacitor 44 of this phase control circuit 43 is linked to the movement of the rotating brush. , controls the discharge time of the neon lamp 46 connected to the gate circuit of the thyristor 42, controls the drive of the electric blower 2 by the movement of the bearing part 29 of the rotary brush 10, and controls the movement of the bearing part 29 of the rotary brush 10. At the same time, the operating torque of this rotary brush can also be changed.

Further, as shown in FIG. 6, a voltage control circuit 49 including a triax 47 and a triax 48 as a control circuit is connected to the electric blower 2, and a variable resistor is connected in series with a capacitor 51 of the voltage control circuit 49 by movement of the rotating brush. 52 may be operated in conjunction with the movement of the bearing portion 29 of the rotary brush 10 via an operating member, and the electric blower 2 may be controlled by a potential difference.

In the above embodiment, the rotary brush 10 is driven by the electric blower 2. However, the rotary brush 10 is not limited to the electric blower, and the rotary brush may be rotated by a dedicated electric motor.

〔Effect of the invention〕

According to the present invention, in a vacuum cleaner that rotates a rotary brush with a large torque so as to be suitable for cleaning floors where dust is difficult to remove, such as carpet surfaces, when the vacuum cleaner body rises above the floor surface. Since the rotating brush stops or operates at low torque, the rotating brush does not lift up from the carpet surface and wear and damage only the tips of the tufts, and it does not involve curtains, etc., making noise. It never gets bigger. The rotating brush is always driven in contact with the floor surface and uses the reaction force from the floor surface, so when the main body floats, the bearing of the rotating brush moves downward and detects the rising of the main body. This eliminates the need for separate parts such as a detector that detects the lifting of the main unit when it comes into contact with the floor, allowing the main unit to be operated smoothly without getting caught on the floor when cleaning. The operation of the control circuit of the operating member due to the lifting of the machine body is performed by the rotary brush itself, which is in contact with the floor, etc., so the control circuit can be reliably adjusted according to the state of contact and separation of the rotary brush with the floor, etc. Furthermore, since the actuating member that controls the control circuit is operated by the movement of the bearing, there is no wear due to constant rubbing of the actuating member 21 that comes into contact with the bearing, and the actuating member 21, which controls the control circuit, is not worn out due to constant rubbing. Durability can be improved compared to a structure in which the members are in contact with each other.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a vertical sectional side view of the bearing section of the same rotary brush, and Figs. 3 to 6 show different embodiments. A circuit diagram showing an example, FIG. 7 is a cross-sectional plan view of a vacuum cleaner that is a premise of the present invention, and FIG. 8 is a vertical cross-sectional side view of the bearing portion of the rotary brush. DESCRIPTION OF SYMBOLS 1... Vacuum cleaner main body, 2... Electric blower as a motor, 10... Rotating brush, 20... Limit switch as a control circuit, 21... Operating member, 29... Bearing part, 36... Changeover switch as a control circuit, 4
3... Phase control circuit as a control circuit, 49... Voltage control circuit as a control circuit.

Claims (1)

[Claims] 1. A vacuum cleaner body with a built-in electric motor, and the vacuum cleaner body is driven by the electric motor and operates in contact with the surface to be cleaned, separating dust from the floor surface and lifting the vacuum cleaner body above the floor surface. A control circuit that controls the electric motor to reduce or stop the operating torque of the rotary brush, and a control circuit that rotatably supports the rotary brush and moves together with the rotary brush. A bearing part is provided on the vacuum cleaner main body so as to be movable up and down, and an operating member that is operated by the bearing part and controls the control circuit is provided on the vacuum cleaner main body opposite to the bearing part. Vacuum cleaner.