JPH0584201A - Suction port body of vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide the suction port body of the vacuum cleaner which can realize power saving at the time of retreat of the suction port main body. CONSTITUTION:In the case a suction port main body 1 is advancing, a motor 12 rotates forward, running wheels rotate forward and assist running, and also, a blade 3 rotates backward and scrapes out dust on the floor surface. In the case the suction port main body 1 is retreating, the motor 12 rotates backward, the running wheels 6 stop, and also, the blade 3 rotates backward and scrapes out dust on the floor surface. A one-way clutch 8 is subjected to idle running, and the running wheels 6 are stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner which saves power when the suction port body is retracted.

[0002]

2. Description of the Related Art A suction port body of a conventional electric vacuum cleaner detects a traveling direction of a suction port body by a traveling direction detecting means, and rotates the cleaning body so as to reverse the traveling direction of the suction port body. The traveling body is rotated so as to rotate in the forward direction of the main body. Since the weight of the suction port body increases and the cost increases when each of the electric motors for rotating these is provided, the cleaning body and the traveling body are rotated by one electric motor.

[0003]

However, in the case of the above-mentioned conventional structure, the traveling body is driven to rotate even when the suction port body is retracted, but the user pulls the hose at the time of retreat, so that the suction port body faces upward. Since the suction port body is not pressed against the surface to be cleaned, the necessity of running assistance is low, and there is a problem that power saving by not driving it is desirable.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a suction port body of an electric vacuum cleaner which saves power when the suction port body moves backward.

[0005]

A suction port body for an electric vacuum cleaner according to claim 1 has a suction chamber opened on a lower surface of the suction port body, and the suction chamber body is opposed to the floor surface on the lower surface of the suction port body. In a suction port body having a cleaning body and a traveling body which are provided with a traveling direction detecting means for detecting a traveling direction of the suction port body and which is rotated by an electric motor through the transmitting means in accordance with the traveling direction, the transmitting means includes the suction means. The running body is stopped when the mouth body is retracted.

The suction port body of the electric vacuum cleaner according to claim 2 is
A suction chamber having an opening on the lower surface of the suction port main body, is provided on the lower surface of the suction port main body so as to face the floor surface, and the advancing direction of the suction port main body is detected by the advancing direction detecting means, and the control means according to this advancing direction In the suction port body having the cleaning body and the traveling body which are rotated by the electric motor controlled by, the control means lowers the output of the electric motor when the suction port body moves backward.

[0007]

The suction port body of the electric vacuum cleaner according to claim 1 detects the traveling direction of the suction port body by the traveling direction detection means, and the transmission means stops the traveling body when the suction port body moves backward.
Power can be saved when the suction port body moves backward.

The suction port body of the electric vacuum cleaner according to claim 2 is
The advancing direction of the suction port main body is detected by the advancing direction detecting unit, the control unit lowers the output of the electric motor when the suction port main unit moves backward, and the power can be saved when the suction port main unit moves backward.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the suction inlet of the vacuum cleaner of the present invention will be described below with reference to the drawings.

First, the suction port body 1 will be described with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral 1 denotes a suction port main body, and a suction chamber 2 is defined in a front and rear direction in the suction port main body 1, and a blade 3 as a cleaning member rotates in the suction chamber 2. It is supported freely, and one end of this blade 3 has a pulley 4
Are formed.

A traveling wheel chamber 5 is formed at the rear of the suction chamber 2, and traveling wheels 6 are disposed in the traveling wheel chamber 5 as a traveling body having a horizontal axis as a rotation axis. A shaft 7 is coaxially attached to the traveling wheels 6, and a pulley 9 is provided at one end of the shaft 7 via a one-way clutch 8.

Further, at the rear end side, there is a motor storage chamber.
11 is formed, the electric motor 12 is housed, and the drive shaft 13 of the electric motor 12 is formed.
The drive pulley 14 is provided in the
As shown in FIG. 2, a drive belt 15 is hung between the drive pulley 14 via the one-way clutch 8 of the shaft 7 and the drive pulley 14, and the blade 3 is rotated by the electric motor 12. It has become. In addition, these pulley 4, shaft 7, one-way clutch 8, pulley 9,
The drive pulley 14 and the drive belt 15 form a transmission means 16.

As shown in FIGS. 3 and 4, the one-way clutch 8 is provided with a disc 22 having a peripheral edge 21 projecting from the periphery thereof, and a disc 23 having a diameter smaller than that of the peripheral edge 21 facing each other. There is. Further, on the inner surface side of the peripheral edge 21, an engaging portion 24 is formed to project, a locking portion 25 along the diametrical direction is formed on one end side of the engaging portion 24, and a curved surface is formed on the other end side. Sliding surface 30 is the periphery
It is formed continuously from 21. On the other hand, a flexible locking piece 27 is inserted into and attached to the circular plate 23 so as to be able to advance and retreat into locking holes 28 and 29 formed in the peripheral edge. A curved sliding surface 30 is formed on the surface facing the sliding surface 30, and the locking piece 27
A locking portion 31 is formed on the surface facing the locking portion 25.

Next, the operation of the above embodiment will be described.

First, when the suction port body 1 is moving forward, the electric motor 12 rotates in the normal direction, the traveling wheels 6 rotate in the normal direction to assist the traveling, and the blades 3 rotate in the reverse direction to scrape out dust on the floor.
At this time, the engaging portion 25 of the engaging portion 24 of the one-way clutch 8
And the engaging portion 31 of the engaging piece 27 are brought into contact with each other, and the traveling wheel 6 rotates as the pulley 9 rotates.

When the suction port body 1 is retracted, the electric motor 12 is rotated in the reverse direction, the traveling wheels 6 are stopped, and
The blade 3 reverses to scrape dust on the floor. At this time,
The sliding surface 26 of the engaging portion 24 of the one-way clutch 8 and the locking piece
The sliding surface 30 of 27 is brought into contact with the disk 22 and the disk 23 to idle, and the running wheels 6 are stopped.

Next, another embodiment will be described with reference to FIG.

In FIG. 5, E is a commercial AC power supply, and this commercial AC power supply E is connected through a full-wave rectification circuit 41 to a resistor R1,
A smoothing capacitor C1 and a low voltage Zener diode ZD1 are connected, and the cathode side of this Zener diode ZD2 is a DC power supply Vcc.

Between the output terminals of the full-wave rectifier circuit 41, the transistors Q1 and Q2 and the field effect transistors FET1 and FE are connected.
T2 is connected like a bridge, electric motor 12 is connected, resistance
Grounded via R2.

On the other hand, reference numeral 42 denotes a changeover switch as a traveling direction detecting means. The forward direction terminal of the changeover switch 42 is connected to a pull-up resistor R3, and an AND circuit AND1 is connected via an inverter circuit inv1. It is connected to the input terminal, and the output terminal of the AND circuit AND1 is connected to the gate of the field effect transistor FET1. The terminal of the changeover switch 42 in the backward direction is connected to the pull-up resistor R4, and the AND circuit is connected via the inverter circuit inv2.
It is connected to one input terminal of AND2, the output terminal of this AND circuit AND2 is connected to the gate of the field effect transistor FET2, and the resistors R5 and R6 are also connected. Further, the output terminals of the inverter circuit inv1 and the inverter circuit inv2 are connected to the input terminals of the OR circuit OR1. The output terminal of the OR circuit OR1 is connected to the other input terminal of each of the AND circuits AND1 and AND2. Further, it is grounded via the diode D1 and the thyristor Th, and a pull-up resistor R7 is connected to the connection point of the diode D1 and the thyristor Th1.

The resistor R2 is connected to the inverting input terminal of the operational amplifier OP1, and the non-inverting output terminal is connected to the connection point of the resistors R8 and R9 connected between the DC power source Vcc and the ground. The output terminal of this operational amplifier OP1 is resistor R10 for pull-up diode D2, resistor R11, capacitor
It is connected to the non-inverting input terminal of operational amplifier OP2 via C2 and resistor R11. The inverting input terminal of the operational amplifier OP2 is connected to the connection point of the resistors R13 and R14 connected between the DC power source Vcc and the ground. Further, the output terminal of the operational amplifier OP2 is connected to the pull-up resistor R15 and the gate of the thyristor Th1.

Next, the operation of the embodiment shown in FIG. 5 will be described.

First, when the changeover switch 42 detects the forward movement of the suction port main body 1, a voltage is applied from the AND circuit AND1 to the gate of the field effect transistor FET1 to turn on the field effect transistor FET1 and the current from the commercial AC power source E is supplied. Is rectified and smoothed, flows through the transistor Q2 and the field effect transistor FET1, and causes the electric motor 12 to rotate normally.

When the changeover switch 42 detects the retreat of the suction port body 1, a voltage is applied from the AND circuit AND2 to the gate of the field effect transistor FET2 to turn on the field effect transistor FET2, and the current from the commercial AC power source E is supplied. Is rectified and smoothed and flows through transistor Q1 and field effect transistor FET2 to reverse motor 12. In addition,
The voltage supplied to the field effect transistor FET2 is set by the resistors R5 and R6, the gate voltage is applied at a voltage lower than the forward rotation, and the electric motor 12 is driven at a lower current than during the forward rotation to reduce the output. To do.

When the voltage of the resistor R2 decreases due to the reversal of the electric motor 12, the operational amplifier OP1 outputs non-inverted output, the operational amplifier OP2 also outputs non-inverted, the thyristor Th is turned on, and the field effect transistors FET1 and FET2 are turned on. The application of the gate voltage is stopped to prevent a large current from flowing through the electric motor 12.

[0027]

According to the suction port body of the electric vacuum cleaner of the first aspect, the traveling direction of the suction port body is detected by the traveling direction detecting means, and when the suction port body moves backward, the transmission means stops the traveling body. Therefore, although the cleaning body and the traveling body are rotated by one electric motor, it is possible to save power while maintaining the effect of scraping by the rotating brush.

According to the suction port body of the electric vacuum cleaner of the present invention, the advancing direction of the suction port body is detected by the traveling direction detecting means, and when the suction port body is retracted, the control means reduces the output of the electric motor. It is possible to save power when the suction port body moves backward.

[Brief description of drawings]

FIG. 1 is a bottom view showing an embodiment of a suction port body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a perspective view showing the electric motor and the transmission means of the suction port body of the electric vacuum cleaner.

FIG. 3 is an exploded perspective view showing the one-way clutch of the above.

FIG. 4 is a sectional view showing a part of the above one-way clutch.

FIG. 5 is a circuit diagram of a circuit for driving an electric motor according to another embodiment of the same.

[Explanation of symbols] 1 suction port main body 2 suction chamber 3 blade as cleaning body 6 traveling wheel as traveling body 12 electric motor 16 transmission means 42 changeover switch as traveling direction detection means

Claims (2)

[Claims] 1. A suction chamber having a suction chamber opened on the lower surface of the suction port main body, which is provided on the lower surface of the suction port main body so as to face the floor surface, and detects the traveling direction of the suction port main body by a traveling direction detecting means. In a suction port body having a cleaning body and a traveling body rotated by an electric motor via a transmission means according to a traveling direction, the transmission means stops the traveling body when the suction port body retreats. The suction body of the machine. 2. A suction chamber having an opening on the lower surface of the suction port body, which is provided on the lower surface of the suction port body so as to face the floor surface, and detects the traveling direction of the suction port body by a traveling direction detecting means. In a suction port body having a cleaning body and a traveling body that are rotated by an electric motor controlled by a control unit according to a traveling direction, the control unit reduces the output of the electric motor when the suction port body moves backward. Vacuum cleaner suction port body.