JP2795384B2 - Vacuum cleaner suction body - Google Patents

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 a rotary body rotated by a driving means.

[0002]

2. Description of the Related Art Conventionally, the direction of travel of a suction port of an electric vacuum cleaner is switched by an operator in contact with a floor surface to be cleaned.
Traveling direction detection hand with changeover switch that is activated
There is known a configuration in which a motor or the like as a driving means of a rotating body such as a rotating brush or a running wheel is detected by a step, and the rotation of the motor is stopped when an overload state occurs in the motor.

[0003]

However, when reversing the traveling direction of the suction opening, the traveling direction of the suction opening is reversed for a while , that is, with the reversal of the traveling direction.
Switch that switches the selector switch in contact with the surface to be cleaned
During this time, the traveling direction detecting means cannot detect the reversal, and the motor does not reverse. Then pull the suction port body to suck
Problems when reversing the direction of mouth movement from forward to backward
However, when the suction port body is advanced from retreat , that is, when the suction port body is located at the user's foot and the angle between the suction port body and the extension pipe is almost vertical, the user operating force from the operating force applied to the forward direction operation force applied in a state pressed against the floor on the floor direction is increased is small, being inverted when the suction port body you inverted forward from the retracted
Rotating brush or running wheel, etc.
You may feel heavy operation due to the rotating body .

When the direction of movement of the suction port body is reversed from retreating to forward movement as described above, the operating force of the user is greatly applied in the direction of the floor surface, so that the load applied to the rotating body from the floor surface is large. There is a problem that the rotation of the motor is stopped even though the motor is not abnormal.

[0005] The present invention has been made in view of the above problems, in together when reliable driving means is stopped at the time of overload, to facilitate manipulation when reversing to advance the traveling direction of the suction port body from a retracted An object of the present invention is to obtain a suction port of a vacuum cleaner in which the driving means is not accidentally stopped at this time.

[0006]

SUMMARY OF THE INVENTION A suction port of a vacuum cleaner according to the present invention faces a case and a surface to be cleaned of the case.
The case body disposed on the surface to be cleaned and in contact with the surface to be cleaned.
And an operator that rotates in accordance with the traveling direction of the vehicle
Switching by the rotation corresponding to the traveling direction of the case body
The changeover switch is provided with
The traveling direction detecting means for detecting the forward and backward traveling directions of the case body by replacement, a rotating body rotatable in both forward and backward directions, and this rotating body as the casing
A forward / reverse rotatable driving means for rotating forward and backward with respect to the traveling direction of the body, a load detecting means for detecting a load of the driving means, and a detecting means for detecting a retreat by the traveling direction detecting means. Control means for inverting the drive means when the load detection means detects an overload and stopping the drive means when the load detection means detects an overload while the forward direction is being detected by the traveling direction detection means; It is provided with.

[0007]

The suction port of the vacuum cleaner according to the present invention contacts the surface to be cleaned when the direction of movement of the suction port is reversed from retreat to forward.
An operator that touches and turns according to the direction of travel of the case
The switch is reversed and the switch is switched to drive the rotating body.
The direction of reverse rotation with respect to the traveling direction until reversed
When the rolling element is detected by the load detection means
Reverse the drive means by the control means to advance the case
Correspondingly it is reversed in a forward direction Runode, the user before from the recession
It is possible to prevent the user from feeling heavy when reversing the direction, and the operation becomes easier. Then, when an abnormal condition such as dust is caught in the rotating body when the suction port body advances, the load detecting means
The overload of the driving means is detected and the driving means is stopped by the control means . Also, if the suction port body is in an abnormal state when retracted, the driving means is reversed and the entangled dust is removed,
Or reversing in the forward direction and ignoring without removing garbage
If the load state is not released, the driving means is stopped.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a suction port of a vacuum cleaner according to an embodiment of the present invention.

First, the configuration of the suction port main body 1 will be described with reference to FIGS.

As shown in FIGS. 2 and 3, the suction port main body 1 is formed by a lower case body 2 and an upper case body 3.
It has a case body . In front of the lower case body 2, a suction chamber 5 is formed by a partition wall 4 provided substantially in the left-right direction.
There is partitioned and formed in the suction chamber 5, cleaning <br/> blade 6 of a circular cylinder shape is rotatably supported, the pulley 7 is formed on one end of the cleaning blade 6.

Also, at one rear end side, a motor housing 8 is provided.
There are formed, the motor 9 is housed the drive shaft 10 of the motor 9 as a driving means driving pulley 11 is provided between the pulley 7 Toko drive pulley 11 of the cleaning Bed <br/> blades 6 , the drive belt 12 is hung, and is rotated in a direction opposite to the travel direction the cleaning blade 6 is traveling direction of the suction inlet main body 1 by an electric motor 9.

Further, a communication passage 14 communicating with the suction chamber 5 and a suction pipe 13 serving as a communication pipe communicating with the vacuum cleaner main body (not shown) is formed substantially at the center of the lower case body 2.

On both sides of the communication passage 14, running wheel chambers 15 each having an open lower surface are formed, and running wheel chambers 15 are accommodated in the running wheel chambers 15, respectively. , 16 is rotated forward by the drive belt 12 in the forward direction with respect to the running direction, that is, cleaning.
It is driven to rotate in the reverse direction to the use blade 6.

Further, a control section storage chamber 21 is formed at the other end on the rear side. The control section storage chamber 21 has a detection section defined by a substrate (not shown) and a substantially U-shaped partition wall 22. A means storing section 23 is provided, and a moving direction detecting means 24 for detecting the moving direction of the suction port main body 1 is stored.

The traveling direction detecting means 24 is provided on the surface to be cleaned.
In contact with the floor surface,
Pressing body 27 which operates with the rotation in the cylindrical body 26 which is operator of the rotating shaft 25 to rotate is Ri attached preparative Te. And
The pressing body 27 activates a changeover switch 28 for detecting the traveling direction. In addition, the rotation shaft 25 is rotatably disposed on both sides of the partition wall 4 that are perpendicular to the front-rear direction of the suction port main body 1.

Further, driven front wheels 31, 31 and driven rear wheels 32, 32 are provided at four corners of the suction port main body 1.

Next, the electric circuit of the suction port body will be described .
This will be described with reference to FIG.

A diode bridge DB for full-wave rectification is connected to the commercial AC power supply E. A resistor R1 for constant voltage and a capacitor are connected between the output terminal of the diode bridge DB and the ground.
C1 and the Zener diode ZD1 are connected, and one end is connected to two divided resistors R2 and R3. A drive circuit 41 is connected to the positive output terminal of the diode bridge DB, and the drive circuit 41 controls the motor 9 connected to the output side.

Further, a resistor R4 for voltage detection is connected between the motor 9 and the ground, and a connection point of the motor 9 and the resistor R4 is connected to an operational amplifier OP1 as load detecting means constituting a comparator. Connected to inverting input terminal. The non-inverting input terminal of the operational amplifier OP1 has a resistor R
The connection point between the resistors R5 and R6 in the series circuit of 5, R6 is connected.

The output terminal of the operational amplifier OP1 is connected to the non-inverting input terminals of the operational amplifiers OP2 and OP3 via the inverter circuit Inv1, the diode D1, and the resistor R7. Also, the output terminal of the operational amplifier OP1 has a resistor R7
And the non-inverting input terminals of the operational amplifiers OP2 and OP3 are grounded via a resistor R8 and a capacitor C1. Further, the connection point of the resistors R9 and R10 of the series circuit of the resistors R9 and R10 is connected to the non-inverting input terminal of the operational amplifier OP2, and the series circuit of the resistors R11 and R12 is connected to the non-inverting input terminal of the operational amplifier OP3. The resistance of R11
And the connection point of the resistor R12.

On the other hand, the forward terminal of the changeover switch 28 is connected via an inverter circuit Inv2 to one input terminal of an AND circuit AND1 whose output terminal is connected to the drive circuit 41, and to the OR circuit OR1 . Connected to one input terminal. Further, connected to the output terminal of the OR circuit OR1, the output terminal of the OR circuit OR1 is connected to one input terminal of the OR circuit OR2 through a parallel circuit of a resistor R14 and a diode D2. Further, one input terminal of the OR circuit OR2 is grounded via the capacitor C2, the other input terminal is connected to a connection point of the resistors R2 and R3, and the output terminal is the other of the AND circuits AND1 and AND2. Is connected to the input terminal of

The output terminal of the OR circuit OR2 is connected to the anode of the thyristor Th1 via the diode D3,
The cathode of this thyristor Th1 is grounded. Further, the anode of the thyristor Th1 is connected to a DC power supply via a resistor R15, and the gate is connected to the output terminal of the operational amplifier OP2 via a resistor R16 and to the DC power supply via a resistor R17.

The emitter of a transistor TR1 is connected to the backward terminal of the changeover switch 28. The collector of the transistor TR1 is connected to a DC power supply via a resistor R21, and is connected to an OR circuit via an inverter circuit Inv3. It is connected to the other input terminal of the circuit OR1 , and to one input terminal of the AND circuit AND2. The receding terminal is connected to the base of a transistor TR2 via a resistor R22, and the emitter of the transistor TR2 is connected to a DC power supply via resistors R23 and R24. Further, the collector of the transistor TR2 is connected to the thyristor Th2
, And the cathode is grounded. The gate of the thyristor Th2 is connected to an output terminal of an operational amplifier OP3 via a resistor R25, and the operational amplifier OP3 is connected to a DC power supply via a resistor R26.
Further, an inverting input terminal of an operational amplifier OP4 is connected to a connection point of the resistors R23 and R24.
The non-inverting input terminal of the resistor R27 and the resistor R27 of the series circuit of resistors R27 and R28 connected between the DC power supply and the ground
The connection point of R28 is connected.

The output terminal of the operational amplifier OP4 is connected to a resistor R2.
9 is connected to the base of the transistor TR3, the collector of which is connected to the forward terminal and the emitter is grounded. In addition, the operational amplifier OP
4 output terminal is connected to DC power supply via resistor R30.
The base of the transistor TR3 is grounded via the capacitor C3.

Further, the operational amplifier OP4 is connected to the transistor TR1 via the inverter circuit Inv4 and the resistor R31.

Thus, the control means C is constituted by these circuits.

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

First, when the motor 9 is operated while the forward movement is detected by the changeover switch 28, the motor 9 rotates in the forward direction. Thus, the running wheel 16 is assisting the drive rotates in the <br/> forward direction is a forward, the cleaning blade 6 to leave off the dust from the floor surface to reverse direction relative to the running wheel 16.

If the load of the motor 9 is normal while the changeover switch 28 detects the forward movement, the resistance R4
The current flowing through the operational amplifier OP1
Is output at the H level, inverted by the inverter circuit Inv1, and connected to the non-inverting input terminals of the operational amplifiers OP2 and OP3, respectively.
Level output. Since the current from the output terminal of the operational amplifier OP3 to the gate of thyristor Th2 performs L level output retains the OFF state of the thyristor Th2 without supplying the transistors TR2, TR1 will remain off, the inverter circuit
Inv3 becomes an L level output, and outputs an L level to the AND circuit AND2 and the OR circuit OR1.

The operational amplifier OP2 also outputs an L-level signal, does not supply a current to the gate of the thyristor Th1, keeps the thyristor off, and outputs the output of the OR circuit OR2 to the AND circuits AND1 and AND2.

Further, since the changeover switch 28 is connected to the forward terminal, the inverter circuit Inv2 performs H level output and inputs the H level to the AND circuit AND1.

In this state, for example, the cleaning blade 6
When the load current flowing through the electric motor 9 increases due to an abnormal state such as dust being caught in the wheel 16, the current flowing through the resistor R 4 exceeds a predetermined value. Therefore , the operational amplifier OP 1 performs an L level output and inverts the output at the inverter circuit Inv 1. Then, the operational amplifier OP2 also outputs the H level, supplies a current to the gate of the thyristor Th1 , turns on the thyristor Th1 , and bypasses the output of the OR circuit OR2 .

Thus, the drive circuit 41 stops the motor 9.

Next, when the reversing is detected by the changeover switch 28, the electric motor 9 rotates in the retreating direction. As a result, the traveling wheel 16 rotates in the backward direction, which is the forward direction, to assist traveling.
And, the cleaning blade 6 rotates in the reverse direction relative to the running wheel 16 bed
To leave off the dust from the surface.

If the load of the motor 9 is normal while the changeover switch 28 detects the backward movement, the resistance R4
The current flowing through the operational amplifier OP1
Is output at the H level, inverted by the inverter circuit Inv1, and connected to the non-inverting input terminals of the operational amplifiers OP2 and OP3, respectively.
Level output. The output terminal of the operational amplifier OP3 outputs an L-level signal, does not supply a current to the gate of the thyristor Th2, keeps the thyristor Th2 off, and keeps the transistor TR2 off. Thereby, the operational amplifier OP
4 outputs an L level signal, the inverter circuit Inv4 outputs an H level signal, and the changeover switch 28 is on the backward terminal side, so that the transistor TR1 is turned on. Thus, the inverter circuit Inv3 becomes an H level output, and the AND circuit AND2 and the OR An H level output is output to the circuit OR1.

The operational amplifier OP2 also outputs an L-level signal, keeps the thyristor off without supplying current to the gate of the thyristor Th1, and outputs the output of the OR circuit OR2 to the AND circuits AND1 and AND2.

Further, since the changeover switch 28 is connected to the backward terminal and the operational amplifier OP4 outputs the L level, the transistor TR3 is turned off, the inverter circuit Inv2 outputs the L level, and the AND circuit AND1 outputs the L level to the AND circuit AND1. Make the input.

In this state, for example, the cleaning blade 6
Abnormal conditions, such as garbage getting caught in the wheel 16, and the user
Floor direction in which the suction inlet body 1 is pressed against the floor surface
When the load current flowing through the motor 9 increases due to an increase in the operating force applied to the motor, the current flowing through the resistor R4 is equal to or greater than a predetermined value, and the operational amplifier OP1 outputs the L level output as shown in FIG. As shown in FIG. 4 (b), the signal is inverted to the H level by the inverter circuit Inv1, and is inverted according to the time constant set by the capacitor C1 and the resistor R8.
As shown in (c), an H level is output to the operational amplifier OP3,
The operational amplifier OP3 also outputs the H level, supplies the gate current to the thyristor Th2 as shown in FIG. 4D, and turns on the transistor TR2, thereby turning the operational amplifier OP4 into the H level as shown in FIG. Output and the resistance R2
According to the time constant 9 and the time constant of the capacitor C3, the transistor TR3 is turned on after a predetermined time t as shown in FIG. And electric motor 9
Is inverted.

[0039] Thus, resulting entrainment between the cleaning blade 6 and the travel wheels 16 when doing the backward if example embodiment, since the electric motor 9 immediately even stops rotating due to an increase in the load current reverses, the entrainment It is safe and convenient because it spits out the waste .

Then, the user moves the suction port main body 1 from the backward position.
When reversing forward, the user's operating force is pressed against the floor.
And the operating force applied in the direction of the floor increases.
The operation force applied in the forward direction decreases. And this retreat
When reversing from
Hand pressing body 27 also rotates the cylinder 26 in contact with the floor surface is inverted
By the time the changeover switch 28 is switched, the traveling direction detecting means 24
Cannot detect reversal and needs to advance the suction port body 1 slightly
There is.

Although the suction port body 1 is moving forward,
When the direction detecting means 24 detects the backward movement,
When turning, the running wheels 16 assisting the running
Reverse rotation and pressing operation toward the floor surface
The load current of the electric motor 9 increases due to the operation.
You.

In the above embodiment, the traveling direction detecting means
Stage 24 detects reversal without detecting reversal yet
The load current of the electric motor 9 rises
Therefore, control for reversing the electric motor 9 is performed in the same manner as the above control.
Be done. For this reason, it is used when reversing from reverse to forward.
It is possible to prevent the user from feeling heavy reversing operation, and to easily operate the reversing operation.
I can make it.

Further , even if the motor 9 is reversed, the current flows to the motor 9.
If the load current rises,
As in the case where the load current flowing through the motor 9 is increased,
For example, dust gets caught in the cleaning blade 6 and the running wheel 16
The electric motor 9 is stopped by controlling an abnormal state such as .

[0044]

According to the suction port of the vacuum cleaner of the present invention, when the traveling direction of the suction port is reversed from retreat to forward.
In contact with the surface to be cleaned
The rotating operator reverses and the changeover switch switches.
The reverse rotation of the rotating body is detected by detecting the overload of the driving means.
Flip it in the forward direction according to the advance of the case body
Therefore, when the user reverses from backward movement to forward movement, he feels heavy.
To stop the driving means by mistake.
It is no easily with operable, abnormal conditions such as dust is caught in the rotating body ∎ You can with stop reliably drive means upon the occurrence.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing the suction port body with the upper lid removed.

FIG. 3 is a sectional view of the same.

FIG. 4A is a waveform diagram showing an output of an operational amplifier OP1. FIG. 4B is a waveform diagram illustrating an output of the inverter circuit Inv1. FIG. 3C is a waveform diagram showing outputs of a resistor R8 and a capacitor C1. (D) is a waveform chart showing an output of the operational amplifier OP3. (E) is a waveform diagram showing an output of the operational amplifier OP4. (F) is a waveform diagram showing the output of transistor TR3.

[Description of Signs ] 1 Suction port main body 9 Electric motor as driving means 16 Running wheel as rotating body 24 Traveling direction detecting means 26 Cylindrical body 28 as operating element Changeover switch C Control means OP1 Operational amplifier as load detecting means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-310632 (JP, A) JP-A-2-77220 (JP, A) JP-A-4-246315 JP, A) JP-A-58-180126 ( JP, A) Japanese Utility Model Showa 60-119357 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47L 9/00 102 A47L 9/02-9/04, 9/28

Claims (1)

(57) [Claims] And a case body disposed on a surface of the case body facing a surface to be cleaned.
Touch the cleaning surface and rotate it in the direction of travel of the case body.
Moving operator and how the case body of the operating member advances
Switch that can be switched by turning
The case body is provided by switching the changeover switch.
<Br the traveling direction detecting means, a rotating body that can also be rotated in either direction of forward and backward, in a forward direction with respect to the rotating body advancing direction of the case body for detecting the traveling direction of the forward and backward A driving means capable of rotating in the forward and reverse directions for rotating; a load detecting means for detecting a load of the driving means; and an overload detected by the load detecting means when the traveling direction detecting means detects retreat. Control means for inverting the driving means and stopping the driving means when the load detecting means detects an overload while the forward direction is being detected by the traveling direction detecting means. Vacuum cleaner suction body.