JPH0618542B2 - Vacuum cleaner with rotating brush - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner with a rotary brush that reduces the operating force by reversing the rotation of the rotary brush.

2. Description of the Related Art A conventional vacuum cleaner of this type will be described with reference to the drawings. In FIG. 6 to FIG. 8, 1 is an upper body incorporating the electric blower 2, 3 is a suction port portion, and the rotating brush 6 is driven by the internal electric motor 4 via the belt 5.
Is provided. 7 is a dust box, 1 upper body
It is removably attached to and has a filter 8 built therein. Reference numeral 9 is a suction port cover body in which the suction port 3 is formed, and is attached to the lower body 10. Reference numeral 11 is a handle pivotally attached to the lower body 10, 12 is a handle grip, which is attached from above and below at the end of the handle 11 by a screw 13, and the screw 13 is a long hole provided at the end of the handle 11. Handle grip 1 by penetrating 14
2 is slidable back and forth, and further, the screw 13 is inserted into a ring 16 which is biased from the front and back by two springs 15 so as to become the sliding center when there is no load, and the handle grip 12 is It is configured so as to be urged to interlock with the ring 16 so as to become the sliding center when there is no load.
Reference numerals 17 and 18 denote switches for switching the rotation of the electric motor 4.

With this structure, the handle grip 12 is attached to the spring 1.
When pushed forward against the biasing force of 5, the switches 17, 18
By this, the rotation of the electric motor 4 is switched to the forward rotation, and the cleaner moves forward while scraping dust such as carpet with the rotating brush 6. At this time, the dust scraped up by the back pressure of the electric blower 2 is stored in the dust box 7. Similarly, when the handle grip 12 is pulled rearward against the biasing force of the spring 15, the rotation of the rotary brush 6 is rotated rearward by the switches 17 and 18, and the rotary force of the rotary brush 6 moves the cleaner backward. .

Problems to be Solved by the Invention In such a conventional vacuum cleaner, when the cleaning speed is slowed down, that is, when the rotary brush 6 is used.
When the speed of the hand holding the handle grip 12 is slower than the self-propelling force of the switch 17, the switch 17, due to the relative speed,
18 is switched to the side where the rotating brush 6 is reversed. However, even if this state is returned to the original state, since the hand is moving in a fixed direction, the rotating brush 6 immediately reverses again.
By repeating this, the vacuum cleaner vibrates back and forth, the electric motor 4 is in a state close to a lock, and not only is the operation feeling bad,
The electric motor 4 could be burned.

The present invention solves such a problem, and an object of the present invention is to provide an electric vacuum cleaner with a rotating brush that always runs stably regardless of the operating speed.

Means for Solving the Problems The technical means of the present invention for achieving the above object has an electric motor, a rotary brush driven by the electric motor, an actuator, and a lever inside the suction opening communicating with the electric blower. A changeover switch for switching the rotation direction of the electric motor is provided, and the lever is provided so as to project from the lower surface of the suction port portion to detect the relative movement direction of the surface to be cleaned and the suction port portion, and the advancing direction of the suction port portion and the rotating brush. The rotation direction of and is set to be the forward direction.

Further, according to the present invention, the electric motor and the changeover switch are separately arranged on the left and right inside the suction port.

Action With the above configuration, the relative movement direction of the surface to be cleaned and the suction port is sensed by the lever projecting on the lower surface of the suction port, and regardless of the behavior of the hand operating the suction port, the rotating brush is It is always rotationally driven in the forward direction with respect to the advancing direction of the suction port.

Furthermore, by arranging the changeover switch and the electric motor separately on the right and left sides of the suction port, the side of the suction port on which the lever is positioned is relatively lightweight. Therefore, the lever pivotally attached in response to the back-and-forth movement of the suction port can be reversed very well.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 4, 20 is a vacuum cleaner main body having an electric blower and a dust collecting section (not shown) built therein, 21 is a power nozzle constituting an inlet section, an extension pipe 22, a hose 23.
It communicates with the cleaner body 20 via the. Reference numeral 24 denotes a power cord, which is electrically connected to the cleaner body 20 and the power nozzle 21 by connecting to a conductor inside the hose 23.

A rotating brush 25 is provided below the power nozzle 21, and is linked to the electric motor 26 via a belt 27.
Reference numeral 28 denotes an auxiliary hose that connects the extension tube 22 and the rotary brush chamber 25a, and reference numeral 29 denotes an extension tube support that connects the auxiliary hose 28 and the extension tube 22. The extension hose is pivotally attached to a shaft 30. Three
A moving roller 1 is rotatably attached to the shaft 30. The shaft 30 is sandwiched by an upper nozzle 33 and a lower nozzle 32 which form the power nozzle 21.

34 is a changeover switch for changing the rotation direction of the electric motor 26.
The actuator 34a has a shaft 35a attached to the lower nozzle 32.
The lever 35 is rotatably mounted around the fulcrum as a fulcrum and is switched. 36 is the upper nozzle 33 and the lower nozzle 3
It is a bumper made of a soft material that is sandwiched between 2 and prevents damage to furniture. The changeover switch 34 and the electric motor 26
Are provided separately on the right and left inside the power nozzle 21.

Reference numeral 37 shown in FIG. 4 is an electric blower provided in the cleaner body 20, and 38 is a main switch of the entire cleaner.

The operation of the above configuration will be described. The dust adhering to the carpet or the like is released by the rotation of the rotating brush 25, and the released dust passes through the extension pipe 22 and the hose 23 due to the back pressure of the electric blower 37 built in the cleaner body 20 and is removed from the inside of the cleaner body 20. Collected in the dust collecting part.

When the power nozzle 21 moves in the forward direction with respect to the cleaning surface of the carpet or the like, the lever 35 contacts the carpet or the like and moves rearward as shown by the solid line in FIG. At this time, as shown in FIG. 4, the changeover switch 34 is arranged so that the rotating brush 25 rotates in the forward direction so that the forward rotating terminal 34b is rotated.
Is connected to the electric motor 26 via. Therefore, once the vehicle starts to move forward, even if the forward speed is manually controlled, the position of the lever 35 moved to the rear continues to be maintained, and the vehicle reverses as in the conventional case, and immediately switches to forward, which is repeated. It will not vibrate and stable operation can be obtained. Even when the vehicle is moving backward, the lever 35 moves forward as shown by the phantom line in FIG.
It is connected to the electric motor 26 via c, and a stable reverse drive is obtained as well.

When the traveling direction of the power nozzle 21 is changed from forward to backward, the lever 35 moves from the rear position shown by the solid line in FIG. 4 through the vertical state to the front shown by the imaginary line. 35 is projected further downward than when it is located at the front or the rear. Therefore, if the lever 35 side is overloaded because the electric motor 26 and the changeover switch 34 are located on the same side of the power nozzle 21, the lever 35 is in the vertical state even if the traveling direction of the power nozzle 21 is changed. Since the rotation cannot be reversed, the rotation of the rotary brush 25 cannot be switched, and an abnormal situation occurs.

Therefore, in the present application, the electric motor 26 and the changeover switch 34
By arranging the power nozzles 21 on the right and left sides, it is possible to prevent the switch 34 of the power nozzle 21 from being overloaded, and the lever 35 can be favorably rotated and reversed in accordance with the back and forth movement of the power nozzle 21. Then, the rotating brush 2
The rotation of 5 is always set in the forward direction with respect to the traveling direction of the power nozzle 21.

Further, since the rotary brush 25 rotates in the front-back direction,
Considering one pile of carpet, the brush is picked up from the front of the pile when moving forward and from the back of the pile when moving backward with the rotating brush 25. For this reason, cleaning can be performed with the rotary brush 25 after the pile has been generated, and as shown in FIG. 5, the longer the pile length, the more the dust collection efficiency can be significantly improved as compared with the conventional unidirectional rotary brush. Further, for a carpet having a long pile length of about 25 mm, as shown in FIG. 5, the dust collection efficiency three times that of the conventional one can be obtained.

Further, in order to obtain higher dust collection efficiency, the power nozzle 21
Even if is slowly moved, the rotating brush 25 maintains the rotation according to the advancing direction of the power nozzle 21 without vibrating back and forth as in the conventional example.

As described above, according to the present invention, the relative movement of the cleaning surface and the power nozzle is detected by the lever, and the rotary brush rotates in the direction of the relative movement. The effect of moving in a fixed direction and causing unstable back-and-forth vibration as in the prior art is eliminated, there is no fear of motor burnout, and high dust collection efficiency is obtained. Further, according to the present invention, since the changeover switch and the electric motor are separately arranged on the right and left sides in the suction port portion, the lever side is not overloaded, and the lever is properly rotated and reversed in accordance with the back and forth movement of the power nozzle. It will be. Therefore,
The relative movement direction of the suction port and the surface to be cleaned is reliably sensed,
It is possible to provide an electric vacuum cleaner having excellent operability.

[Brief description of drawings]

FIG. 1 is an external perspective view of an electric vacuum cleaner with a rotating brush showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of a power nozzle of the electric vacuum cleaner, and FIG. 3 is a plan sectional view of the power nozzle. FIG. 4 is a circuit diagram of the same electric vacuum cleaner, FIG. 5 is a characteristic diagram showing a comparison of dust collecting efficiency with a conventional example, FIG. 6 is an external perspective view of a conventional electric vacuum cleaner with a rotating brush, and FIG. FIG. 8 is a longitudinal sectional view of the conventional vacuum cleaner, and FIG. 8 is an exploded perspective view of a handle portion of the conventional vacuum cleaner. 20 ... Vacuum cleaner body, 21 ... Power nozzle (suction port), 22 ... Extension tube, 25 ... Rotating brush, 26 ...
Electric motor, 32 ... lower nozzle, 33 ... upper nozzle, 3
4 ... Changeover switch, 34a ... Actuator, 34
b ... front rotation side terminal, 34c ... rear rotation side terminal, 3
5 ... Lever, 37 ... Electric blower.

Claims (1)

[Claims] 1. An electric vacuum cleaner main body having an electric blower and a dust collecting section built-in, and a suction port communicating with the electric blower. Inside the suction port, the electric motor and a rotary brush driven by the electric motor are provided. And a changeover switch having an actuator and a lever for changing the rotation direction of the electric motor, and the changeover switch and the electric motor are separately arranged on the left and right in the suction port portion, and the changeover switch is pivotally mounted inside the suction port portion. A lever for switching the actuator is provided so as to project from the lower surface of the suction port, and the forward direction of the moving direction of the suction port and the rotating direction of the rotary brush selected by the changeover switch which is switched by the lever which operates in conjunction with this progress An electric vacuum cleaner with a rotating brush.