JP3345906B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vacuum cleaner having an improved floor nozzle.

[0002]

2. Description of the Related Art A conventional vacuum cleaner will be described below.

FIG. 7 is a partial cross-sectional view showing a conventional vacuum cleaner with a part thereof cut away. That is, reference numeral 1 denotes a cleaner main body, which has an electric blower 2 and a dust collecting chamber 3 therein, and connects a floor nozzle 6 via a hose 4 and an extension pipe 5 composed of a plurality of pipes. Reference numeral 7 denotes a nozzle body of the floor nozzle 6, and the nozzle body 7 has a suction chamber 8. 9
Is a joint connected to the nozzle body 7, and can rotate up, down, left, and right. Reference numeral 10 denotes an operation unit for operating the vacuum cleaner provided between the hose 4 and the extension pipe 5.

The operation of the vacuum cleaner constructed as described above will be described. When the vacuum cleaner is operated, the electric blower 2 operates to generate a low pressure in the dust collection chamber 3. One end of the joint 9 connected to the floor nozzle 6 faces the suction chamber 8, and when a low pressure is generated in the dust collection chamber 3, the floor nozzle 6 is closed.
Is in contact with the floor, a low pressure is also generated in the suction chamber 8, and an air current flows into the dust collection chamber 3 via the suction chamber 8 of the floor nozzle 6, the inside of the joint 9, the extension pipe 5, and the hose 4, and the dust flows. Is accumulated.

[0005]

However, in the above-mentioned conventional configuration, during operation of the vacuum cleaner using the floor nozzle 6, if the floor nozzle 6 is in contact with the floor, a low pressure is also generated in the suction chamber 8. For this reason, when the floor nozzle 6 sticks to the floor and lifts the floor nozzle 6 from the floor to get over an obstacle, a strong lifting force is required, and the operability is not always good. Another problem is that when the floor nozzle 6 sucks something that cannot be sucked by the floor nozzle 6 during cleaning of the floor, an operation must be performed to remove the sucked object artificially.

[0006] The present invention solves the above-mentioned conventional disadvantages, and is intended to be used when the floor nozzle lifts the floor nozzle from the floor in order to get over an obstacle, or when the floor nozzle sucks something that cannot be sucked by the floor nozzle. An object of the present invention is to provide an excellent vacuum cleaner capable of easily lifting a floor nozzle and removing foreign matters.

[0007]

According to a first aspect of the present invention, there is provided a vacuum cleaner having an electric blower and a dust collecting chamber, and a cleaner main body at one end. having a grip portion gripping connected by connecting the extension pipe to the hose and the other end for guiding the airflow to the dust collection chamber is user to
And a floor nozzle having a joint connected to a nozzle main body having a suction chamber and having one end connected to the extension pipe, and an operation section on the upstream side of the grip from the handle , and an extension pipe.
The handle by the operation such as cleaning
Operation of the intake upstream side of the section, a sensor for detecting the stress that is applied to the extension pipe or floor nozzle <br/> provided, provided a control means for controlling the rotational speed of the electric blower according to a signal from said sensor Things.

A second means for solving the problem is that a sensor is provided above a connection between a plurality of extension pipes.

A third means for solving the problem is that a sensor is provided below a connecting portion between a plurality of extension pipes.

A fourth means for solving the problem is that a sensor is provided on an upper part of a joint.

A fifth means for solving the problem is that the sensor is provided at a lower part of the joint.

[0012]

According to the present invention, when the floor nozzle is lifted by the above construction, the sensor outputs a signal of pressure (force applied by an operation such as cleaning operation) to the control means, and the control means outputs the pressure signal (cleaning time). The electric fan is operated so as to decrease the rotational speed of the electric blower by reducing the change in the force applied by the operation such as the above operation, so that the adsorption force of the floor nozzle to the floor is weakened, and the floor nozzle can be easily lifted.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. The same reference numerals are given to the same parts in the related art, and the description is omitted.

FIG. 1 is a view for explaining a schematic configuration and operation of a vacuum cleaner according to a first embodiment of the present invention, with a part thereof cut away. In FIG. 1, reference numeral 11 denotes a pressure sensor for detecting stress, which is installed at an arbitrary position A on the upstream side of the handle 13 shown by oblique lines in FIG. And 12 is a pressure sensor 11
This is control means provided in the cleaner main body 1 for controlling the number of revolutions of the electric blower 2 based on a signal from the main body. 13 is a bunch hand portion that moves manipulate the position of the floor nozzle 6.

The operation of the vacuum cleaner configured as described above will be described. Assuming that the electric vacuum cleaner is operated and the electric blower 2 is operating normally, the floor nozzle 6 is in contact with the floor surface at this time, and is adsorbed on the floor surface by the low pressure generated by the electric blower 2 and the floor nozzle 6 In this state, a force equal to or greater than the weight of the floor nozzle 6 is required to lift the floor nozzle 6. now,
When the operation of lifting the handle 13 to lift the floor nozzle 6 from the floor surface is performed, a change occurs in the pressure applied to the pressure sensor 11 in the direction in which the floor nozzle is lifted. When it is monitored and it is determined that the floor nozzle 6 is going to be lifted due to a change in pressure, the rotation speed of the electric blower 2 is reduced. When the floor nozzle 6 comes into contact with the floor again and it is determined that the change in the pressure applied to the pressure sensor 11 presses the floor nozzle 6 against the floor, the rotation speed of the electric blower 2 is returned to the normal rotation speed. As described above, according to the present embodiment, the pressure sensor 11 for sensing stress is installed at an arbitrary position A on the upstream side of the operation unit 10 shown by oblique lines in FIG. Control means 1 for controlling the rotational speed of the motor
By providing 2, the operation of lifting the floor nozzle 6 is performed by the handle portion 13, so that the suction force of the floor nozzle 6 on the floor surface is reduced, and the floor nozzle 6 can be easily lifted.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In FIG. 2, reference numerals 5a and 5b denote extension pipes which connect a plurality of pipes. Reference numeral 11 denotes a pressure sensor which is installed at the fitting of the connecting portions of the extension pipes 5a and 5b.
The arrow B in FIG. 2 indicates the direction of the air flow in the extension pipes 5a and 5b. The floor nozzle 6 shown in FIG. 7 is in the direction of arrow b, and the cleaner body 1 comes in the direction of arrow a. 1 is different from the configuration of FIG.
This is a point limited to the fitting upper part of the connection portions a and 5b.

The operation of the above configuration will be described. When the electric vacuum cleaner is operated and the electric blower 2 is operating normally, the floor nozzle 6 is in contact with the floor surface and is adsorbed on the floor surface by the low pressure generated by the electric blower 2. A state in which a force greater than the weight of the nozzle 6 is required. At this time, the pressure sensor 11 is
a and 5b receive the pressure shown by arrow C in FIG.
The control means 12 determines that the state where the pressure sensor 11 is receiving pressure is a normal operation state based on the signal from the pressure sensor 11. Now, when an operation is performed to lift the handle 13 to lift the floor nozzle 6 from the floor surface, the pressure applied to the pressure sensor 11 decreases due to the weight of the floor nozzle 6 and the like, and the control means 12 outputs In response to the signal, it is determined that the floor nozzle 6 is to be lifted due to the decrease in pressure, and the rotation speed of the electric blower 2 is reduced. When the floor nozzle 6 comes into contact with the floor surface again and pressure is applied to the pressure sensor 11, the control means 12 determines that the floor nozzle 6 is pressed on the floor surface and returns the rotation speed of the electric blower 2 to the normal rotation speed. Let it. As described above, according to the present embodiment, the pressure sensor 11 for sensing the stress is installed above the fitting portion of the connecting portion of the extension pipes 5a and 5b, and the rotation speed of the electric blower 2 is controlled by the signal from the pressure sensor 11. By providing the control means 12 for performing the operation of lifting the floor nozzle 6,
By using 3 or the extension pipe 5b, the adsorbing force of the floor nozzle 6 on the floor surface can be reduced, and the floor nozzle 6 can be easily lifted.

Next, a third embodiment of the present invention will be described with reference to FIGS.

The difference from the second embodiment is that the pressure sensor 11
Is installed at the lower part of the fitting as shown in FIG. 2, while the latter is installed at the upper part of the fitting of the connecting portions of the extension pipes 5a and 5b.

The operation of the above configuration will be described. When the floor nozzle 6 is to be lifted, the pressure sensor 11 receives the pressure in the direction shown by the arrow D in FIG. 3 by the extension pipes 5a and 5b, and the control means 12 receives the pressure from the pressure sensor 11 by the signal from the pressure 11. It is determined that the floor nozzle 6 is about to be lifted when the vehicle is in the state of being, and the rotation speed of the electric blower 2 is reduced. When the floor nozzle 6 comes into contact with the floor surface again and the pressure applied to the pressure sensor 11 decreases, the control means 12 determines that the floor nozzle 6 is pressed against the floor surface and reduces the rotation speed of the electric blower 2 to the normal rotation speed. Let it return. As described above, according to the present embodiment, the pressure sensor 11 for sensing the stress is installed below the fitting portion of the connecting portion of the extension pipes 5a and 5b, and the number of rotations of the electric blower 2 is controlled by the signal from the pressure sensor 11. By providing the control means 12 for performing the operation for raising the floor nozzle 6, the handle 13 can be moved in the same manner as in the second embodiment.
Alternatively, by using the extension pipe 5b, the suction force of the floor nozzle 6 on the floor surface can be reduced, and the floor nozzle 6 can be easily lifted.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIGS.

In FIG. 4, reference numeral 9 denotes a joint, which comprises a vertically rotating portion 9a connected to the nozzle body 7 and a left and right rotating portion 9b connected to the extension pipe 5 shown in FIG. As shown in FIG. 5, the difference from the second and third embodiments is that the pressure sensor 11 is installed on the extension pipes 5a and 5b, whereas the pressure sensor 11 is installed above the vertical rotating part 9a of the joint 9. is there. Note that the sensitivity of the pressure sensor 11 is set so as to react with the weight of the nozzle body 7.

The operation of the above configuration will be described. When the floor nozzle 6 is to be lifted, the pressure sensor 11 installed on the upper part of the vertical rotating part 9a is moved in the direction indicated by the arrow E in FIG. 5 by the weight of the nozzle body 7 and the suction force of the floor nozzle 6 on the floor surface. Upon receiving the pressure, the control means 12 determines from the signal from the pressure sensor 11 that the floor nozzle 6 is about to be lifted when the pressure sensor 11 is receiving the pressure, and reduces the rotation speed of the electric blower 2. When the floor nozzle 6 comes into contact with the floor surface again and the pressure applied to the pressure sensor 11 decreases, the control means 12 determines that the floor nozzle 6 is pressed against the floor surface and reduces the rotation speed of the electric blower 2 to the normal rotation speed. Let it return. As described above, the pressure sensor 11 is installed above the vertically rotating part 9a of the joint 9, and the control means 12 for controlling the number of rotations of the electric blower 2 by the signal from the pressure sensor 11 is provided. The pressure in the vertical direction can be sensed irrespective of the angle, and the suction force of the floor nozzle 6 to the floor surface is weakened by simply holding the end of the extension pipe 5 on the joint 9 side and trying to lift the floor nozzle 6. , Floor nozzle 6
Can be easily lifted.

Next, a fifth embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 6, the point different from the fourth embodiment is that the pressure sensor 11 is installed below the vertically rotating part 9a of the joint 9. In such a configuration, the floor nozzle 6
During normal use, pressure is applied to the pressure sensor 11 in the direction indicated by the arrow F in FIG. 6, and at this time, the control means 12 maintains the electric blower 2 at normal rotation. If the floor nozzle 6 is to be lifted now, the pressure applied to the pressure sensor 11 decreases, and the control means 12 receives a signal from the pressure sensor 11 and judges that the pressure decrease is to lift the floor nozzle 6, and The rotation speed of the blower 2 is reduced. As described above, the pressure sensor 11 is installed below the vertically rotating portion 9a of the joint 9, and the control means 12 for controlling the number of rotations of the electric blower 2 by the signal from the pressure sensor 11 is provided. The pressure in the vertical direction can be sensed irrespective of the angle of the floor nozzle 6, and the operation of simply lifting the floor nozzle 6 as in the fourth embodiment weakens the adsorbing force of the floor nozzle 6 on the floor surface. Can be easily lifted. The reduction in the number of rotations of the electric blower 2 includes a stop.

[0027]

As described above, according to the vacuum cleaner of the present invention, a hose having an operation section and connected to the cleaner body, an extension pipe connected to the operation section, and connected to the extension pipe. A floor nozzle with a joint, and the intake air upstream from the handle
A pressure sensor for detecting a force and a stress applied by an operation such as a cleaning operation is provided on the operation unit, the extension pipe or the floor nozzle on the side, and a control means for controlling the rotation speed of the electric blower based on a signal from the pressure sensor is provided. Thereby, by performing an operation of lifting the floor nozzle, the suction force of the floor nozzle to the floor surface is weakened, and the floor nozzle can be easily lifted. It is possible to realize an excellent vacuum cleaner capable of weakening the attraction force and easily removing foreign substances by trying to lift.

Further, by providing pressure sensors above and below the connecting portion of the extension pipe, the operability of the floor nozzle is improved simply by connecting a plurality of extension pipes depending on the cleaning place and trying to lift the extension pipe. be able to.

Further, by providing the pressure sensors at the upper and lower portions of the joint, the operability of the floor nozzle can be improved simply by lifting the tip of the extension pipe.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration and operation of a vacuum cleaner according to a first embodiment of the present invention, with a part thereof broken away.

FIG. 2 is a view for explaining a cross-sectional configuration and operation of an extension pipe section of the second embodiment.

FIG. 3 is a view for explaining a cross-sectional configuration and operation of an extension pipe section of the third embodiment.

FIG. 4 is a partial perspective view of a floor nozzle unit provided with the pressure sensor of the fourth embodiment.

FIG. 5 is a view for explaining a cross-sectional configuration and operation of a floor nozzle portion of the fourth embodiment.

FIG. 6 is a diagram for explaining a cross-sectional configuration and operation of a floor nozzle portion according to a fifth embodiment.

FIG. 7 is a partial cross-sectional configuration diagram showing a conventional vacuum cleaner with a part thereof cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 3 Dust collection chamber 4 Hose 5, 5a, 5b Extension pipe 6 Floor nozzle 7 Nozzle main body 8 Suction chamber 9 Joint 10 Operation part 11 Pressure sensor 12 Control means

Continuation of the front page (56) References JP-A-2-268719 (JP, A) JP-A-3-178625 (JP, A) JP-A-59-51556 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) A47L 9/28 A47L 9/02

Claims (5)

(57) [Claims] 1. A cleaner main body having an electric blower and a dust collecting chamber, a hose connected to the cleaner main body at one end to guide an air flow to the dust collecting chamber, and an extension pipe connected to the other end to allow a user to connect the cleaner.
An operating unit having a grip portion to be gripped, a floor nozzle having a joint connected to a nozzle body having a suction chamber and having one end connected to the extension pipe, and an intake air upstream of the grip portion.
The operation unit, the extension pipe or the floor nozzle is operated by a cleaning operation or the like to operate the operation unit or the extension pie on the upstream side of the handle.
A sensor for detecting the applied that stress the flop or floor nozzle provided, vacuum cleaner provided with a control means for controlling the rotational speed of the electric blower according to a signal from the sensor. 2. The vacuum cleaner according to claim 1, wherein a plurality of extension pipes are provided, and a sensor is provided above a connection between the extension pipes. 3. The vacuum cleaner according to claim 1, wherein a plurality of extension pipes are provided, and a sensor is provided below a connecting portion between the extension pipes. 4. The vacuum cleaner according to claim 1, wherein the sensor is provided on an upper portion of the joint. 5. The vacuum cleaner according to claim 1, wherein the sensor is provided at a lower portion of the joint.