JPS644782B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vacuum cleaner.

Generally, in a vacuum cleaner, the dust collection power decreases as the amount of dust collected increases or as the load on the electric blower increases due to the type of floor surface. For this reason, conventionally, the input of the electric blower has been adjusted by manually operating an input regulator such as a variable resistor, but the operation is cumbersome and is meaningless unless you know how to use it. For this reason, we have installed a sensor whose output changes depending on the air volume or negative pressure, and input the output of this sensor into the power control circuit to automatically control the input to the electric blower. Since some settings need to be made, a method of using the manual input adjuster described above has been considered, but in addition to operating the knob on the input adjuster, it is also possible to use the knob on the switching section to select the signal between the input adjuster and the sensor. must be operated. As a result, the operation becomes cumbersome and there is a risk of making operational errors, and since the number of knobs increases, there are still design problems that make it difficult to take up space for mounting.

This invention was made in view of these points, and it is possible to select between manual control and automatic control when controlling the input of an electric blower, and moreover, it is possible to select between control means selection and manual control with a single knob. The purpose of this invention is to provide a vacuum cleaner that can perform the following operations.

This invention provides a usage pattern in which the input of an electric blower is intentionally determined by manually operating an input regulator;
A mode of use is obtained in which the input is automatically determined by the sensor, and manual control by the input regulator and automatic control by the sensor are switched by operation near the end of the stroke of the knob of the input regulator. , the operability is improved by using only one knob to operate, and the design problem regarding the installation space is solved, and the output level of the input regulator near the end of the stroke of the knob is changed by a variable means. In addition, the output level of the input regulator near the end of the knob stroke and the output level of the sensor under no load are set in a wide range that cannot be obtained with automatic control based on the output of the sensor. By setting them equally, when switching from a state where input control is performed using the sensor output to a state where input control is performed using the output of the input regulator, the input control of the electric blower can be adjusted from the lowest input to the desired input level. This prevents sudden high-speed rotation due to the condition, and furthermore, when switching between manual control by the input regulator and automatic control by the sensor by moving the knob to the end, it is possible to switch in the output variable range of the input regulator. By doing so, it is possible to temporarily wrap the output from both and output it, thereby preventing the input to the electric blower from being interrupted temporarily.Furthermore, the input regulator adjusts depending on which end the knob is located. Although a difference in height occurs in the output, moving the knob to either end of the stroke will switch the switching section and control the sensor. The configuration is such that the state can be switched to a state in which control is performed based on the output.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 is the vacuum cleaner body. This vacuum cleaner main body 1 is made by detachably connecting an electric case 2 and a dust case 3. A suction port 4 is formed on the front surface of the dust case 3, and a handle 5 and a clamp 6 for the electric case 2 are formed on the top surface. A lid 7 for opening and closing an opening for discarding dust is provided, and inside thereof, although not shown, a holding part and a filter for selectively holding a dust collection bag are provided. A handle 8 is attached to the upper part of the electric case 2 so as to be freely raised and lowered, and an electric blower 9 and a cord reel (not shown) are arranged side by side inside.

Next, FIG. 4 shows an electric circuit. The electric blower 9 and the power control circuit 10 are connected in series and connected to a power source via a cord 11. In addition, the remote control switch 12
A remote control circuit 14 is provided that closes the circuit between the power supply and the electric blower 9 and also closes the power supply circuit 13 when turned ON. Also provided are a sensor 15, a control circuit 16, a display comparison circuit 17, a display 18, and a variable resistor 19 serving as an input regulator, which are maintained in a driving state by receiving power from the power supply circuit 13. These control circuit 16, power control circuit 10, display comparison circuit 17, and display 18 are connected in sequence. Furthermore, a changeover switch 20, which is a changeover section, is provided.
Contact a of this changeover switch 20 is connected to the sensor 15.
The contact b is connected to the output side of the variable resistor 1.
The movable contact c is connected to the input side of the control circuit 16. As shown in FIGS. 2 and 3, the slider 2 of the variable resistor 19
1 has a knob 22 on the top and is provided on the top of the electric case 2 so as to be able to slide under its own pressure. knob 2
2 also has a function of pressing the actuator 23 of the changeover switch 20 when one end of the stroke is reached. A display 18 is also provided at the top of the electric case 2. The sensor 15 is arranged at the rear of the electric case 2. Note that the circuit elements are connected by a PC board 24 provided on the top of the electric case 2.

In such a configuration, the remote control switch 12 is turned on to drive the electric blower 9. Now, when the knob 22 is placed in automatic position A, the changeover switch 20 closes between a and c. On the other hand, the amount of air (or wind pressure) flowing through the electric case 2 changes depending on the dust collection state and the type of floor surface, and the sensor 15 detects this state and outputs a control signal. This control signal is input to the power control circuit 10 via the changeover switch 20 and the control circuit 16. Therefore, the power control circuit 10 increases the input to the electric blower 9 when the air volume is low, and vice versa. Sometimes lower the input. The magnitude of the input to the electric blower 9, which is automatically varied in this way, is displayed on the display 1.
8.

When cleaning a thin sheet, the suction port body comes into close contact with the sheet, so in the automatic control state, the input of the electric blower 9 is increased, and the suction port body comes into closer contact with the sheet. In such a case, the resistance value of the variable resistor 19 is changed by sliding the knob 22 together with the slider 21. In conjunction with this operation, selector switch 2
0 switches the state between b and c to be ON. Therefore, the output of the variable resistor 19 is input to the power control circuit 10 via the control circuit 16, and the electric blower 9
By driving with a desired small input, it is possible to lower the degree of vacuum at the suction port body and clean the sheet without sticking. By adjusting the resistance value of the variable resistor 19 depending on the application, it is possible to arbitrarily set the input to the electric blower 9.

Next, a second embodiment of the present invention will be explained based on FIGS. 5 and 6. Components that are the same as those in the embodiment described above are designated by the same reference numerals, and description thereof will be omitted (the same applies hereinafter).
A variable means for varying the lowest output level of the variable resistor 19, that is, a semi-fixed resistor 25 is connected to the variable resistor 19. An adjustment dial 26 for the semi-fixed resistor 25 is provided on the upper part of the electric case 2.

Therefore, the output of the sensor 15 is controlled by the control circuit 16.
In the automatic control state where the air inlet body is off the floor and there is no load, the output of the sensor and the input of the electric blower 9 are at their lowest levels, but their levels remain unchanged. On the other hand, by adjusting the semi-fixed resistor 25, the lowest output level can be freely changed when the knob 22 is slid to the end and manual control is performed by the output of the variable resistor 19. It is possible. For example, when sucking up dust adhering to curtains, etc., during automatic control, the electric blower 9 is driven with an input that is smaller than the input when the suction port body is removed from the floor, while preventing the curtain from being sucked. It can also be used to collect dust.

Furthermore, a third embodiment of the present invention will be explained based on FIG. 7. Resistors R ₁ and R ₂ are connected in series to the power supply circuit 13, and the movable contact c is connected to the input side of the control circuit 16 via a diode D. That is, the lowest bias circuit 27 is added.

Therefore, by setting the values of resistors R ₁ and R ₂ , it is possible to equalize the lowest output level of sensor 15 or variable resistor 19. The lowest output level is determined at the level under no-load conditions. Therefore, when switching from automatic control based on the output of the sensor 15 to manual control based on the output of the variable resistor 19, switching is performed with less level fluctuation to obtain a state where the input is adjusted from the lowest input to the desired input, thereby preventing unexpected It is also possible to prevent the motor from rotating at high speed.

Furthermore, a fourth embodiment of the present invention will be explained based on FIG. In this embodiment, a contact d connected to the output side of the sensor 15 is provided near the end of the resistor 28 of the variable resistor 19, and this contact d and the variable resistor 19
The slider 21 constitutes a changeover switch 29 which is a switching section, and the slider 21 is connected to the control circuit 16.

Therefore, when the slider 21 is slid together with the knob 22 and is in contact with the resistor 28, manual control is performed based on the output of the variable resistor 19, and when the knob 22 is slid to the end and is in contact with the resistor 28, manual control is performed based on the output of the variable resistor 19. When the mover 21 is in contact with the contact point d, automatic control is performed based on the output of the sensor 15. Therefore, it is possible to form the changeover switch 29 with a simple structure of simply adding a contact d opposite the resistor 28. The contact point d can be easily formed with a conductive pattern on the same substrate as the resistor 28.

Furthermore, a fifth embodiment of the present invention will be explained based on FIG. 9. In this embodiment, three conductive parts e, f, and g are arranged in parallel with the resistor 28 of the variable resistor 19, and a short conductive part h is arranged at one end of the conductive part f, and the conductive parts e and f are connected. The conductive part g is connected to the control circuit 16, the conductive part h is connected to the output side of the sensor 15, and the slider 21 and the conductive parts f and g are connected between the resistor 28 and the conductive part e. Slider 30 to connect
The conductive parts f, g, h and the slider 30 constitute a changeover switch 31 which is a changeover part.

Therefore, the knob 22 is slid together with the sliders 21 and 30, but the slider 21 is not connected to the resistor 2.
The variable resistor 1 is in contact with the conductive part e.
This is a state in which manual control is performed by the output of 9. That is, the output of the variable resistor 19 is output to the control circuit 16 via the conductive parts e, f, the slider 30, and the conductive part g which serves as a common contact.

When the slider 21 is slid until it is separated from the resistor 28, the slider 30 is in a state of connecting the conductive parts g and h. That is, the output of the sensor 15 passes through the conductive part h, the slider 30, and the conductive part g to the control circuit 1.
6 is output.

Therefore, manual control takes place in the region l ₁ during the stroke, and automatic control takes place in the region l ₂ .

Next, a sixth embodiment of the present invention will be explained based on FIG. 10. In this embodiment, the conductive parts e, g, h are arranged in parallel with the resistor 28 of the variable resistor 19, the sliders 21, 30 are interlocked, the conductive parts e, g are connected to the control circuit 16, The conductive part h is connected to the output side of the sensor 15, and the conductive parts e, g, h and the slider 21,
30 constitutes a changeover switch 32 which is a changeover section. The length l ₁ of the resistor 28 is shorter than the conductive parts e and g, and the length l ₂ +l ₃ of the conductive part h is much shorter than the conductive parts e and g. l ₁ + l ₂ are conductive parts e, g
equal to the length of

Therefore, the region _l1 during the stroke of the knob 22 and the slider 21 is the manual control range in which the input is controlled by the output of the variable resistor 19, and
The region l ₂ during the stroke No. 2 is an automatic control state in which the output of the sensor 15 is output to the control circuit 16 via the sliders 21 and 30 and the conductive parts h and g. Switching from manual control to automatic control is performed during the stroke from the end of the variable output range of the movable resistor 19 _.
It is done by wrapping the different parts. In this lap _L3 , signals from the variable resistor 19 and the sensor 15 are output to the control circuit 16. Therefore, it is possible to prevent the input to the electric blower 9 from being interrupted when switching between manual control and automatic control.
As shown in FIG. 11, when the length of the resistor 28 is made to match the length of the conductive parts e and g, by covering one end of the resistor 28 with an insulating film 33,
It is possible to obtain the same effect.

Finally, a seventh embodiment of the present invention will be explained based on FIG. 12. Conductive parts e, f, and g are arranged in parallel with the resistor 28, and conductive parts h and i are arranged on an extension of conductive part f. Resistor 28 and conductive part e
The slider 21 that connects the conductive part i or the conductive part f or the conductive part h and the conductive part g are connected to each other and connected to the knob 22. It is. The conductive part g is the control circuit 1
6. Furthermore, the knobs 22
Switches 34 and 35 are provided which have a movable contact m and contacts j and h that are interlocked with the operation of the switch. The conductive parts e and f are the contact j of the switch 34 and the switch 35.
The output side of the sensor 15 is connected to the contact h of the switch 34 and the contact j of the switch 35, and the conductive parts i and h are connected to the contact h of the switch 34 or 35.
are connected to movable contacts m, respectively. These sliders 30 and conductive parts j, g, h,
i and the switches 34 and 35 form a switching section 36.

Therefore, when the sliders 21 and 30 are slid by the knob 22 and the slider 30 connects the conductive parts f and g, the output of the variable resistor 19 is between the sliders 21 and 30 and the conductive part g. control circuit 16 via
and manual control is performed. Slider 2
1 and 30 are located at one end, and the slider 30 is the conductive part g,
In the state where the contacts i are connected, the switches 34 and 35 are connected between the contacts h and m. Therefore, the output of the sensor 15 is outputted to the control circuit 16 via the contacts h and m of the switch 34 and the conductive parts i and g, and automatic control is performed. When the sliders 21 and 30 are located at the other end and the slider 30 connects the conductive parts h and g, the contacts j and m of the switches 34 and 35 are connected. Therefore, the output of the sensor 15 is output to the control circuit 16 via the contacts j and m of the switch 35 and the conductive parts h and g.

In this way, the output of the variable resistor 19 is
Although the output differs depending on which end the slider 21 is located at, the output level does not change from that position no matter which end the slider 21 is located, and automatic control based on the output of the sensor 15 is performed. It is possible to switch to There is a big difference between the input required to clean a carpet and the input required to clean a hard floor. The form of use is also limited depending on the place of use. In such a case, it is not necessary to move the slider 21 over a wide range, and switching between manual and automatic operation can be performed within an effective output adjustment range.

Since this invention is configured as described above, by operating one knob of the input regulator, the input of the electric blower can be manually adjusted, and
It is possible to switch from manual control to automatic control using sensors, and with this, it is possible to eliminate design problems regarding installation space by using only one knob, and it is also possible to change the output level of the input regulator. This allows a wide range of input settings not available with automatic control, and also allows the output level of the input adjuster near the end of the knob stroke to be equal to the output level of the sensor at no load. By setting, the input control of the electric blower can be quietly adjusted from the lowest level to the desired level when switching from automatic control to manual control, and
By switching from manual control to automatic control within the output variable range of the input regulator, it is possible to prevent interruptions in power supply to the electric blower at the time of switching. This has the advantage of being able to switch to automatic control without changing the level of the output of the input regulator, whether it is small or large.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the invention, FIG. 2 is a partially cutaway side view, and FIG. 3 is a plan view showing the interlocking relationship between the variable resistor and the changeover switch. FIG. 4 is an electric circuit diagram thereof, FIG. 5 is a partial perspective view showing the second embodiment of the present invention, FIG. 6 is a partial electric circuit diagram thereof, and FIG. 7 is a third embodiment of the present invention. FIG. 8 is an electric circuit diagram showing a fourth embodiment of the present invention. FIG. 9 is an electric circuit diagram showing a fifth embodiment of the present invention.
FIG. 0 is a partial electric circuit diagram showing a sixth embodiment of the present invention, FIG. 11 is a partial electric circuit diagram showing a modification thereof, and FIG. 12 is a partial electric circuit diagram showing a seventh embodiment of the present invention. It is an electrical circuit diagram. DESCRIPTION OF SYMBOLS 1...Vacuum cleaner body, 9...Electric blower, 10...Power control circuit, 15...Sensor, 19...Variable resistor, 2
0...Switching switch (switching part), 22...Knob, 2
5... Semi-fixed resistance (variable means), 29... Changeover switch (switching section), 31, 32... Changeover switch (switching section), 36... Switching section.

Claims (1)

[Scope of Claims] 1. An electric blower is provided in the vacuum cleaner body and driven by input control by a power control circuit, and is controlled by operating a knob and a sensor that outputs a control signal according to changes in air volume or wind pressure. a variable resistor whose signal can be changed is selectively connected to the power control circuit via a changeover switch, a switching point of the changeover switch is located at an end of a stroke of a knob of the variable resistor; A vacuum cleaner characterized in that the switching point of the switching switch is changed by operating a knob. 2 The vacuum cleaner body is equipped with an electric blower whose input is controlled and driven by a power control circuit, a sensor that outputs a control signal according to changes in air volume or wind pressure, and a variable resistor whose control signal can be changed by operating a knob. a switch is selectively connected to the power control circuit via a changeover switch, the changeover point of the changeover switch is located at the end of the stroke of the knob of the variable resistor, and when the changeover switch is switched, A vacuum cleaner characterized in that a variable means is provided for varying the output level of the variable resistor in the vicinity of the operating position of the knob. 3 The vacuum cleaner body is equipped with an electric blower whose input is controlled and driven by a power control circuit, a sensor that outputs a control signal according to changes in air volume or wind pressure, and a variable resistor whose control signal can be changed by operating a knob. a switch is selectively connected to the power control circuit via a changeover switch, the changeover point of the changeover switch is located at the end of the stroke of the knob of the variable resistor, and when the changeover switch is switched, A vacuum cleaner comprising a minimum bias circuit that sets the output level of the variable resistor near the operating position of the knob to be equal to the output level of the sensor under no load. 4 The vacuum cleaner body is equipped with an electric blower whose input is controlled and driven by a power control circuit, a sensor that outputs a control signal according to changes in air volume or wind pressure, and a variable resistor whose control signal can be changed by operating a knob. selectively connected to the power control circuit via a changeover switch, the changeover point of the changeover switch being located at the end of the stroke of the knob within the variable output range of the variable resistor. A vacuum cleaner characterized by: 5 The vacuum cleaner body is equipped with an electric blower whose input is controlled and driven by a power control circuit, a sensor that outputs a control signal according to changes in air volume or wind pressure, and a variable resistor whose control signal can be changed by operating a knob. selectively connects the switch to the power control circuit via a changeover switch, and sets the changeover point of the changeover switch to one end of the stroke of the knob of the variable resistor and the other end of the stroke of the knob of the variable resistor. A vacuum cleaner characterized in that the vacuum cleaner is located at.