JP4968189B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a general household or business use vacuum cleaner, and more particularly to load control.

  A conventional general vacuum cleaner will be described with reference to FIGS. FIG. 10 is a schematic configuration diagram of a conventional vacuum cleaner, and FIG. 11 is a circuit configuration diagram of the vacuum cleaner.

  In FIG. 10, 1 is a cleaner body, 2 is an electric blower built in the cleaner body 1 and generates a suction force, and 3 is an operation mode of the electric blower 2 with different electric power. A hose having operation means 4, 5 is an extension pipe, 6 is a dust collection chamber which is arranged in the front part of the cleaner body 1 and accumulates sucked dust. The dust chamber 6 is connected via an intake port 7 provided in the cleaner body 1, and the hose 3 or the hose 3 and the extension pipe 5 form an intake path. The operation means 4 is provided in the vicinity of the grip portion 8 of the hose 3, and the user operates the operation means 4 without changing the grip portion while holding the grip portion 8 and performing a cleaning operation. The operation mode can be switched. In addition, the extension pipe 5 is configured to be adjustable, and by changing the length of the extension pipe 5, the distance from the grip 8 to the floor suction tool 9 can be adjusted, and various heights and physiques can be used. Each person is considered to perform an optimum cleaning operation.

  Reference numeral 9 denotes a floor suction tool for sucking dust on the floor surface in contact with the floor surface, and includes a rotating brush 10 for scooping up dust on the floor surface and an electric motor 11 for rotationally driving the rotating brush 10. Yes.

  In FIG. 11, reference numeral 14 denotes control means, which is constituted by a microcomputer 15. The operating means 4 is composed of three switches SW1, SW2 and SW3 and resistors (r1 to r4), and by operating each switch, the power supply VDDsw of the operating means 4 is operated with the resistors and switches. A voltage divided by different combined resistors that change depending on the situation appears as Vout and is input to the microcomputer 15. Usually, this kind of analog signal is inputted to an AD (analog-digital) conversion port as a function of the microcomputer 15, converted into a digital value inside the microcomputer 15, and converted into a digital value. The numerical determination values corresponding to each of the switches SW1, SW2, and SW3 are compared to determine which switch is pressed, and the mode corresponding to each switch is determined.

  The microcomputer 15 includes a first bidirectional thyristor 16 that is a driving unit for the electric blower 2 and a second bidirectional thyristor that is a driving unit for the electric motor 11 in accordance with the voltage Vout input from the operation unit 4. The electric power supplied to the electric blower 2 and the electric motor 11 is controlled by turning on / off 17 or performing phase control by controlling the trigger phase.

  A mode in which electric power is supplied to the operating means 4 from the cleaner body 1 side to the suction path formed by the hose 3 or the hose 3 and the extension pipe 5, and the operating means 4 is operated to the cleaner body 1 side. And a pair of power lines 13 for supplying power from the cleaner main body 1 to the electric motor 11 are arranged, and the microcomputer 15 provided in the cleaner main body 1 is an operating means. The electric power supplied to the electric blower 2 and the electric motor 11 is controlled according to the mode set at 4. Since the microcomputer 15 has a plurality of modes controlled according to the difference in the applied voltage and the supplied power to the electric blower 2 and the electric motor 11, the user can operate the electric cleaner in a desired mode. The machine can be operated.

  Further, on the path of the power line 13, a closing means 18 for opening and closing the power supply path to the electric motor 11 is provided inside the floor suction tool 9, and the electric motor 11 only when the closing means 18 is closed. It is possible to supply power to

  This closing means 18 is installed on the contact surface with the floor surface of the floor suction tool 9, and is closed only when the floor suction tool 9 is in contact with the floor surface, and is floating from the floor surface Is opened, and the power supply to the electric motor 11 is forcibly cut off. As a result, when the floor suction tool 9 floats in the air and a person can touch the exposed rotating brush 10, the rotation of the rotating brush 10 is forcibly stopped. It has a structure that takes into account.

  In the electric vacuum cleaner configured as described above, the user operates the operation means 4 to set to a predetermined mode, and the microcomputer 15 supplies electric power corresponding to the set mode to the electric blower 2 and the electric motor 11. When the supply power to the electric blower 2 and the electric motor 11 is shifted from the stop mode for stopping to the operation mode for supplying electric power, the dust sucked from the floor suction tool 9 passes through the intake passage. Accumulated in the dust collection chamber 6.

  Normally, when the user intentionally sucks dust on the floor surface, the floor suction tool 9 is brought into contact with the floor surface to be cleaned, and the suction port (not shown) of the floor suction tool 9 is provided. Dust on the floor surface is removed by approaching the floor surface, but when the user moves to change the place to be cleaned, the floor suction tool 9 is lifted in the air. In this state, since the floor suction tool 9 is separated from the floor surface to be cleaned, the electric blower 2 operates to remove dust on the floor surface even if suction air is generated. There is a problem that power cannot be consumed wastefully.

  As means for solving such a problem, there is one that lowers the power supplied to the electric blower 2 when the floor suction tool is lifted in the air (see, for example, Patent Document 1).

Moreover, what detected whether the floor suction tool 9 is in contact with the floor surface, and controlled the electric power supplied to the electric blower 2 according to the state is proposed (for example, patent document 2). reference).
Japanese Patent No. 3045834 JP 2001-245834 A

  However, in the configuration of the above-described conventional vacuum cleaner, the position of the operation means 4 is a configuration on the premise that the user performs the cleaning operation with the grip portion 8, and has a portion other than the grip portion 8. For the user who performs the cleaning operation, when the operation means 4 is to be operated, the gripping position must be changed. Further, even when the gripping unit 8 is gripped and the cleaning operation is performed, at least one finger out of the gripping unit 8 is released from the gripping unit 8 in order to operate the operation unit 4 while performing the cleaning operation. In other words, the burden is concentrated on the remaining fingers, which increases the feeling of fatigue.

  The present invention solves the above-described conventional problems, and eliminates the hassle of changing the gripping position in order to switch the mode, even if the cleaning operation is performed with a part other than the gripping part, and for the mode switching. An object of the present invention is to provide an easy-to-use vacuum cleaner that can reduce the burden on the user.

  In order to solve the above-described conventional problems, the vacuum cleaner of the present invention includes a vacuum cleaner body including an electric blower that generates suction air, a suction tool for sucking dust on a surface to be cleaned, and the suction tool. An intake path that guides the sucked air to be sucked into the main body of the cleaner, contact detection means that is provided in the suction tool and detects contact with the surface to be cleaned of the suction tool, and a plurality of modes with different supply power A control means for controlling the power supplied to the electric blower; and a mode determination means, wherein the mode determination means is a signal from the contact detection means upon contact with the surface to be cleaned of the suction tool. When the combination of signals at the time of non-contact is a combination set in advance corresponding to each of the plurality of modes, the mode corresponding to the combination is determined, and the combination corresponding to the mode intended by the user , Suction The contact detection means outputs a signal at the time of contact and a signal at the time of non-contact corresponding to the operation, and the mode determination means determines the combination by contacting or separating the surface to be cleaned. The mode intended by the user is determined, and the control means switches the operation of the electric blower with the supply power corresponding to the determined mode, so that the user can easily change the mode without changing the gripping part. Can be switched, and the burden on the hand can be reduced.

  Since the vacuum cleaner of the present invention switches to each mode with different supply power supplied to the electric blower by bringing the suction tool into contact with the floor or separating it, the user holds the grip to switch the mode. There is no need to change the position, and all the fingers can always be used for gripping, so the burden on the hand can be reduced and the usability can be improved.

  1st invention is a vacuum cleaner main body which incorporates the electric blower which generate | occur | produces a suction wind, the suction tool for inhaling the dust on a to-be-cleaned surface, and the suction wind attracted | sucked from the said suction tool to the said vacuum cleaner main body An intake path that leads to the suction tool, contact detection means that is provided in the suction tool and detects contact with the surface to be cleaned of the suction tool, and controls power supply to the electric blower having a plurality of modes with different power supply Control means, and mode determination means, the mode determination means, the combination of the signal from the contact detection means at the time of contact with the surface to be cleaned of the suction tool and the signal at the time of non-contact, When a combination is set in advance corresponding to each of a plurality of modes, the mode corresponding to the combination is determined, and the suction tool is brought into contact with the surface to be cleaned in a combination corresponding to the mode intended by the user. To release The contact detection means outputs a contact signal and a non-contact signal corresponding to the operation, and the mode determination means determines the mode intended by the user by determining the combination and controls the mode. By switching the operation of the electric blower with the supplied power corresponding to the determined mode, the user can easily switch the mode without changing the gripping part, and the burden on the hand is also reduced. Can be reduced.

  In the second invention, in particular, the mode determining means of the first invention determines to switch a plurality of modes in a preset order, and is in contact with the surface to be cleaned of the suction tool input from the contact detecting means. When the combination of the signal and the signal at the time of non-contact is a predetermined combination, the mode is switched.There are few combinations of the contact with the surface to be cleaned of the suction tool operated by the user and the non-contact operation. Since it can be realized by a simple combination, the mode switching operation can be simplified and the usability can be improved.

  According to a third aspect of the invention, in particular, the vacuum cleaner of the first or second aspect of the invention has a timer means for measuring time, and the mode determining means is connected to the contact detection means within a predetermined time measured by the timer means. It is determined by a combination of an input signal at the time of contact with the surface to be cleaned of the suction tool and a signal at the time of non-contact. Only the combination of the non-contact signal is determined as a signal for which an operation for mode switching is performed, and the mode is switched, so that the accuracy of the mode switching determination can be improved.

  According to a fourth aspect of the present invention, in particular, the suction tool according to any one of the first to third aspects is a floor suction tool that sucks dust on the floor surface, and the floor suction tool is opened to the floor surface side. A suction port body having a portion, and a joint portion having one end connected to the suction port body and connected to the intake passage and the other end connected to the intake passage, and the suction port body and the joint portion are connected to each other. It is configured to be movable, and contact detection means is provided at the rear of the suction port body. When the user tries to lift the floor suction tool, the front lower surface of the suction port body is in contact with the floor surface. It becomes a fulcrum, the rear of the suction mouth becomes an action point, lifts first, and the contact detection means detects non-contact with the floor surface, so the floor of the floor suction tool can be detected with a relatively small force. You can perform contact and non-contact operations on the surface, and switch modes. Can Kusuru.

  In the fifth invention, in particular, the suction tool according to any one of the first to third inventions is a floor suction tool that sucks dust on the floor surface, and the floor suction tool is opened to the floor surface side. A suction port body having a portion, and a joint portion having one end connected to the suction port body and connected to the intake passage and the other end connected to the intake passage, and the suction port body and the joint portion are connected to each other. When the floor suction tool is lifted by a user's cleaning operation, the front lower surface of the suction mouth body is in contact with the floor surface. It becomes a fulcrum while contacting, and the rear of the suction mouth becomes the point of action, and the front is lifted up last, so it is difficult for the user's unintended non-contact signal due to the user's cleaning operation to occur To improve the accuracy of the mode switching decision. Can.

  In a sixth aspect of the present invention, in particular, the suction tool according to any one of the first to fifth aspects is a floor suction tool that sucks dust on the floor surface, and the rotating brush that sweeps up the dust on the floor surface, An electric motor that rotationally drives the rotating brush, a power line that is electrically connected to a vacuum cleaner body and supplies power to the electric motor, and is arranged in the middle of the power line, and the floor suction tool is grounded to the floor surface The open / close switch is sometimes closed, and the open / close switch is used as a contact detection means. The contact detection means and the open / close switch need not be provided separately, and can be realized with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
Hereinafter, the vacuum cleaner in the 1st Embodiment of this invention is demonstrated, referring FIGS.

  FIG. 1 shows a circuit configuration diagram of the electric vacuum cleaner according to the first embodiment of the present invention. In addition, about the same component as the said conventional vacuum cleaner, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In FIG. 1, reference numeral 9 denotes a floor suction tool which is an example of a suction tool for sucking dust from the surface to be cleaned, and the floor suction tool 9 is configured to be detachable from the extension pipe 5. The floor suction tool 9 incorporates a rotating brush 10 and an electric motor 11 that drives the rotating brush 10, and electric power is supplied to the electric motor 11 from an electric power line 13 provided in the intake path.

  The vacuum cleaner main body 1 is provided with an electric blower 2 that generates suction air and a dust collection chamber 6 that collects dust. When an air flow for sucking dust is generated by the rotation of the electric blower 2, dust on the surface to be cleaned is sucked from the floor suction tool 9, and the dust collecting chamber 6 in the cleaner body 1 through the extension pipe 5 and the hose 3. It is collected at. The air carrying the dust is filtered in the dust collection chamber 6, the dust is collected in the dust collection chamber 6, and only the filtered air is exhausted outside the cleaner body 1. Further, a grip portion 8 is provided at the tip of the hose 3 so that the user can easily handle the vacuum cleaner.

  The control means 14 includes a microcomputer 20 and has an “operation mode” and a “stop mode”, and controls the power supplied to the electric blower 2.

  The floor suction tool 9 is provided with an open / close switch 18a in the middle of the power line 13, and is configured to close one side of the power line 13 when the floor suction tool 9 is grounded to the floor surface. . On both sides of the open / close switch 18a, a resistor r1 is connected to the cleaner body 1 side, a resistor r2 is connected to the electric motor 11 side, and the power line 13 is connected. The resistors r1 and r2 are inserted in parallel.

  The power supply terminal Vdd of the microcomputer 20 is connected to one side of the power line 13, one side is connected in series with the resistor r1 and the resistor r2, and the other end of the resistor r0 provided in the cleaner body 1 is connected to the other side. The voltage V1 obtained by dividing the Vdd-GND voltage by the combined resistance of the resistor r1 and the resistor r2 and the resistor r0 is input to the microcomputer 20 and connected to the ground terminal GND of the microcomputer 20. To determine the mode. That is, the mode determining means for determining the mode and the timer means for measuring a predetermined time when determining the mode are constituted by the microcomputer 20.

  The microcomputer 20 determines the mode based on the voltage V1, and if the determined mode is the “operation mode”, the electric blower is configured so that the first bi-directional thyristor 16 is phase-controlled to have a preset supply power. The second bidirectional thyristor 17 is controlled so as to supply electric power to 2 and generate suction air and supply electric power to the electric motor 11 so that the rotary brush 10 operates at a predetermined rotational speed.

  If it is “stop mode”, the power supply to the electric blower 2 is stopped. In the initial state when the electric vacuum cleaner is turned on, the “stop mode” is set.

  The microcomputer 20 controls the amount of electric power supplied to the electric blower 2 by changing the phase timing of the trigger signal transmitted to the first bidirectional thyristor 16 with respect to the zero cross of the power source. The rotation speed of the electric motor 11 is controlled by changing the trigger timing of the two bidirectional thyristors 17.

  FIG. 2 shows a side sectional view of the floor suction tool 9.

  In FIG. 2, reference numeral 21 denotes a suction port body of the floor suction tool 9, which has an opening 22 facing the floor surface and has a rotating brush 10. Reference numeral 23 denotes a joint portion, one end of which is detachably connected to the extension pipe 5, the other end is connected to the suction port body 21, and can be rotated up and down with respect to the suction port body 21. It has a configuration.

  Reference numeral 24 denotes a vertically movable roller disposed behind the lower surface of the suction port body 21 and is biased downward by a biasing means (not shown). The operation of the open / close switch 18a is interlocked with the vertical operation of the roller 24. When the roller 24 moves upward against the urging force of the urging means, the open / close switch 18a is closed and the downward direction is lowered. When it moves to, the open / close switch 18a is opened. When suction wind is generated by the electric blower 2, dust on the floor is sucked through a path indicated by an arrow A in FIG. 2 and introduced into the extension pipe 5.

  As described above, in the present embodiment, the closing switch 18a and the roller 24 constitute the closing means 18, and the closing means 18, the resistance r0, the resistance r1, and the resistance r2 constitute a contact detection means. Yes.

  About the vacuum cleaner in this Embodiment comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the user intends to clean the floor surface, the suction port body 21 is normally grounded to the floor surface, and the roller 24 is pressed against the floor surface, but the biasing force applied to the roller 24 by the biasing means. Is set with a force weaker than the weight of the floor suction tool 9, the roller 24 moves upward relative to the suction mouth 21 when the floor suction tool 9 is placed on the floor surface. At this time, the open / close switch 18a is closed, and power can be supplied to the motor 11.

At this time, the combined resistance value rn1 of the resistances r1 and r2 in the floor suction tool 9 is
rn1 = r1 · r2 / (r1 + r2) (Formula 1)
It becomes.

The power supply terminal Vdd of the microcomputer 20 is connected to one side of the power line 13, and this line becomes a common line. The microcomputer 20 controls the phase of the electric motor 11, and the voltage appearing at V <b> 1 while the microcomputer 20 is turning off the second bidirectional thyristor 17 is based on the GND terminal of the microcomputer 20. When
Von = (r0 / (r0 + rn1 + 2 × r)) × Vdd (Formula 2)
It becomes. Here, r is a very small resistance of the power line in the hose 3 and the extension pipe 5, but it is very small compared with r0, r1, r2, and can be ignored.
Von = (r0 / (r0 + rn1)) × Vdd (Formula 3)
And
Von = (r0 / (r0 + r1 · r2 / (r1 + r2))) × Vdd (Formula 4)
When the user lifts the floor suction tool 9 from the floor surface, the energized roller 24 moves downward with respect to the suction port body 21. At this time, the open / close switch 18a is opened, and the microcomputer 20 However, even if the second bidirectional thyristor 17 is turned on, the power supply to the motor 11 is forcibly cut off.

  When the user lifts the floor suction tool 9 while holding the grip 8 or the extension pipe 5 and tries to leave the floor suction tool 9, the joint 23 connected to the extension pipe 5 is lifted. At this time, due to the weight of the suction port body 21, the suction port body 21 rotates forward and downward with respect to the joint 23, and is pulled by the joint portion 23, so that the rear side of the suction port body 21 is lifted first. . At this time, the front lower surface of the suction port body 21 is in a state of being in contact with the floor surface, and until this state, the gripping portion 8 or the extension pipe 5 that is gripped with a relatively light force can be lifted.

  The height of the floor suction tool 9 with respect to the floor surface is adjusted by adjusting the position at which the open / close switch 18a is closed or opened with respect to the vertical movement width of the roller 24 and the distance from the floor surface of the suction port body 21. In this embodiment, the position at which contact / non-contact is detected can be set. In this embodiment, even when the front lower surface of the suction port 21 is in contact with the floor surface, the rear lower surface is the floor. If it is in a state away from the surface, it is set to detect non-contact.

At this time, the combined resistance value rn2 of the resistances r1 and r2 in the floor suction tool 9 is
rn2 = r1 (Formula 5)
And
Voff = (r0 / (r0 + r1)) × Vdd (formula 6)
It becomes.

  The microcomputer 20 can determine whether the floor suction tool 9 is grounded or lifted up depending on whether the voltage input to V1 is Von or Voff. Further, since the floor suction tool 9 is detachably connected to the extension pipe 5, when the floor suction tool 9 is removed, the voltage of V1 becomes the GND level, and can be discriminated. It is said. Thereby, it is set as the structure which improves a determination precision so that mode determination can be performed only with respect to the earthing | grounding and lifting of the floor suction tool 9, without being influenced by the voltage level change of V1 at the time of attachment or detachment.

  The microcomputer 20 has in advance a mode corresponding to the power supplied to the electric blower 2 as shown in Table 1, and a mode transition determination pattern based on a combination of Von and Voff.

  In Table 1, the strong mode is a mode in which the power supplied to the electric blower 2 is 1000 W and the suction force is increased, and the weak mode is the phase control of the first bidirectional thyristor 16 to the electric blower 2. The mode is a mode in which the power supply is lowered to 300 W to weaken the suction force, and the stop mode is a mode in which power supply to the electric blower 2 is not performed.

  In Table 1, the transition determination pattern of each mode is based on the information on whether the floor suction tool 9 is in contact with the floor surface or leaving the floor, ie, a combination of Von and Voff. The mode is identified by changing the number of alternately generated Von and Voff levels and the length (time) of the Von or Voff signal. As shown in Table 1, when Von and Voff levels that occur alternately are defined as phases, for example, the mode transition determination pattern in the strong mode is composed of four phases, Phase 1 to Phase 4, and the pattern of the stop mode is It consists of three phases.

  By incorporating the time factor into the mode transition judgment pattern, the number of times of grounding and leaving operation of the floor suction tool 9 when changing the mode is reduced, and the usability is improved. The structure which can prevent generation | occurrence | production of the mode transition which a user does not intend by the earthing | grounding and leaving of the floor suction tool 9 which generate | occur | produces by receiving an impact from a floor surface when cleaning a location and a carpet It is said.

  3, 4, 5, and 6 are flowcharts for determining the mode transition. FIG. 3 illustrates the overall flow of the mode transition determination, and FIGS. 4, 5, and 6 illustrate the strong mode. The flow of determination of transition to, transition to weak mode, and transition to stop mode is shown.

  First, the overall flow will be described with reference to FIG.

  In FIG. 3, in step 1, it is confirmed whether the voltage level of V1 is Von, that is, whether the floor suction tool 9 is grounded. If it is grounded, the voltage of V1 is Von, and the microcomputer 20 counts up the time count in step 2 as a function of the timing means, returns to step 1, and V1 = Von continues. While this is repeated, the time when V1 = Von is counted up. If V1 is not Von in Step 1, the process proceeds to Step 3. In Step 3, it is confirmed whether V1 is Voff, that is, whether the floor suction tool 9 has left the floor.

  The microcomputer 20 sets a state where the floor suction tool 9 is grounded as an initial state as a precondition for determining the mode transition, and after the grounding state continues for 1 second or more, the mode transition is performed. Judgment is made possible. This is intended to perform mode determination only when the user intends to change the mode and touches the ground for more than 1 second. The floor suction tool 9 is operated to move on the floor surface. When changing the mode, the judgment of mode transition is not performed for a short time of leaving and grounding, which is not intended by the user due to a step or the like.

  Therefore, when V1 is Voff in Step 3, it is a case where the ground state changes to the bed leaving state, and the process proceeds to Step 4, but in Step 4, the state of V1 = Voff is less than 1 second. In this case, it is determined that the voltage change of V1 is not caused by the intended mode transition operation, and after the time count is cleared in step 16, the process is repeated from step 1. If V1 = Voff is not satisfied in step 3, it is not V1 = Von. Therefore, it is clearly not a signal for performing an operation for mode transition. This may occur when the floor suction tool 9 is attached to or detached from the extension pipe 5.

  When the process proceeds to step 4, if the time count has exceeded one second, the mode transition determination is ready, and in order to perform the determination in phase 2, the time count is once cleared in step 5, Proceed to 6.

  In step 6, V1 = Voff, that is, whether or not the floor suction tool 9 is in the state of getting out of bed, and the user intentionally operates the floor suction tool 9 to switch the mode. If you are, you are out of bed. If V1 = Voff in Step 6, go to Step 7 to increment the time count, return to Step 6, and repeat this while V1 = Voff, so that the time count is a time when V1 = Voff. Will be counted.

  When V1 = Voff is not established, the process proceeds to step 8, where it is confirmed whether V1 = Von. At this time, if V1 = Von is not satisfied, V1 = Voff is not satisfied and the signal voltage is different from the signal for determining the mode transition. Therefore, the mode determination is stopped and the time count is cleared in step 16, and then step 1 Return to and redo all decisions. If V1 = Von in step 8, the process proceeds to step 9, but the voltage of V1 has been switched from Voff. In steps 9, 10, and 11, the time count is confirmed. The time counting time at this time is the time when V1 = Voff, and in step 9, it is confirmed whether the time when Voff is 0.3 seconds.

  0.3 seconds is a period that is the first Voff of the strong mode mode transition determination pattern as shown in Table 1. If 0.3 seconds, the user is about to perform a transition operation to the strong mode. The process proceeds to step 12 where the strong mode is determined.

  If it is not 0.3 seconds, the process proceeds to step 10. Similarly, if it is 0.7 seconds as compared with 0.7 seconds, the process proceeds to weak mode determination in step 13. If it is not 0.7 seconds, the process proceeds to step 11. Similarly, the process proceeds to stop mode determination in step 14 if it is 1 second as compared with 1 second. If it is not 1 second in step 11, it does not apply to the transition determination pattern in any mode, so it is determined that the grounding and getting out of the floor that the user does not intend has occurred, and the process proceeds to step 16.

  Thus, by measuring the time and determining the signal level within a predetermined time, the accuracy of determining the mode transition can be improved.

  The strong mode determination, weak mode determination, and stop mode determination from step 12 to step 14 will be described later. In step 15, the result of each determination is determined, and if the mode transition is confirmed, the process is terminated as it is. If the mode shift determination is NG, the process proceeds to step 16 to clear the time count and repeat the process from step 1.

  In this embodiment, the initial state (phase 1) of all modes is set to V1 = Von, the signal level of phase 2 is set to Voff, and the length (time) varies depending on the mode. Therefore, it can be realized with a simple processing flow as shown in FIG.

  Further, the signal pattern appearing in V1 has an error depending on the user's operation method, etc., and a fixed determination value such as 0.3 second, 0.7 second, or 1 second has a problem in determining the mode transition. Therefore, in reality, it is set to have a tolerance. In this case, for example, 0.3 seconds ± 0.1 seconds, 0.7 seconds ± 0.1 seconds, and 1 second ± 0.1 seconds are set so that the respective times including tolerances do not overlap.

  Next, details of the strong mode determination will be described with reference to FIG. In the strong mode determination, the determination is made from the phase 3. In step 1, the time count is once cleared. In step 2, it is confirmed whether V1 = Von. If V1 = Von, the process proceeds to step 3, the time count is incremented, and the process returns to step 2. If V1 = Von is not satisfied, the process proceeds to step 4 to check whether V1 = Voff. If V1 = Voff, the process proceeds to step 5, but the floor suction tool 9 has changed from the grounded state to the floored state, and the time count at this time is the time of Von in phase 3. If V1 = Voff is not satisfied in step 4, V1 = Von is not satisfied and the signal level is not for mode transition determination. Therefore, the process proceeds to step 12, mode switching is not performed, and NG information for mode transition determination is set. The strong mode determination process is terminated.

  In step 5, it is confirmed whether the time count is 0.7 seconds. If it is 0.7 seconds, it is determined that the level of V1 in phase 3 matches the mode transition determination pattern, and the process proceeds to step 6. If it is not 0.7 seconds, it is determined that the signal is not a ground state signal generated by the operation of the mode transition intended by the user, and the process proceeds to Step 12.

  In step 6, the time count is once cleared in order to make a determination in phase 4, and the process proceeds to step 7.

  In step 7, it is confirmed whether V1 = Voff. If V1 = Voff, the process proceeds to step 8, the time count is incremented, and the process returns to step 7. If V1 = Voff is not satisfied, the process proceeds to step 9 to check whether V1 = Von. If V1 = Von, the process proceeds to step 10, but the floor suction tool 9 has changed from the bed leaving state to the grounded state, and the time count at this time is the time of Voff in phase 4. If it is determined in step 9 that V1 = Von is not satisfied, V1 = Voff is not satisfied and the signal level for determining the mode transition is not obtained, and thus the process proceeds to step 12.

  In step 10, it is confirmed whether the time count is 0.3 seconds. If it is 0.3 seconds, it is determined that the level of V1 in phase 4 matches the mode transition determination pattern, and the process proceeds to step 11. If it is not 0.3 seconds, it is determined that the signal is not a ground signal generated by the operation of the mode transition intended by the user, and the process proceeds to Step 12.

  In step 11, the four phases of the strong mode mode transition determination pattern all coincide with each other, the mode is switched to the strong mode, and the strong mode determination is terminated.

  Next, FIG. 5 shows a flowchart of weak mode determination. The mode transition determination pattern is different from the strong mode only in the phase setting time, and the flow for switching to the weak mode is the same as the strong mode determination. Processing is performed.

  FIG. 6 shows a flowchart for determining the stop mode. In FIG. 6, in step 1, the time count is once cleared in order to perform the determination in phase 3, and in step 2, it is confirmed whether V1 = Von, and V1 If = Von, the process proceeds to step 3, the time count is incremented, and the process proceeds to step 4. In step 4, it is confirmed whether or not the time count has passed 1 second or more. If 1 second has not passed, the process returns to step 2 and is repeated. The mode transition determination pattern for the stop mode is composed of three phases. If one second or more has elapsed, phase 3 is established, and the process proceeds to step 7 to switch to the stop mode and stop. The mode judgment ends.

  In step 2, if V1 = Von is not established, the process proceeds to step 5 to check whether V1 = Voff. In step 5, if V1 = Voff is not satisfied, V1 = Von is not established, and the signal level is not for mode transition determination. Therefore, the process proceeds to step 8 and mode switching is not performed, and NG information for mode transition determination is set. Then, the stop mode determination process is terminated. If V1 = Voff, the process proceeds to step 6 where the time count is confirmed. If the time count is 1 second or more, the phase 3 is established, so the process proceeds to step 7; Proceed to to set NG information.

  As described above, the floor suction tool 9 is lifted and left or grounded in a short time so that the voltage of V1 becomes the mode transition determination pattern of each mode shown in Table 1. The mode can be switched without changing the gripping position by the user and without changing the gripping position, and the usability can be improved. Further, the gripping position of the user may be the gripping portion 8 or an arbitrary position of the extension pipe 5. By gripping a position closer to the floor suction tool 9 and performing a cleaning operation, the gripping position and the floor Since the distance of the suction tool 9 is shortened and the feeling of weight during lifting and the feeling of operation of the cleaning operation are reduced, the feeling of fatigue can be further reduced and the usability can be improved.

  Furthermore, if the entire suction port body 21 is lifted away from the floor surface, all the weight from the gripping position is applied to the gripping hand, so that the weight increases and the operational feeling at the time of switching the mode is affected. However, even if the roller 24 is arranged behind the suction port body 21 and the front lower surface of the suction port body 21 is in contact with the floor surface, the non-contact is detected if the rear lower surface is separated from the floor surface. Therefore, mode switching operation can be performed with a light operation feeling.

  In the present embodiment, the operation mode is divided according to different supply power to the electric blower 2, but is divided according to the rotation speed of the electric motor 11, or the supply power to the electric blower 2 and the rotation speed of the electric motor 11. Needless to say, it may be classified by combination.

(Embodiment 2)
FIG. 7 is a flowchart for determining the mode transition of the vacuum cleaner according to the second embodiment of the present invention, and FIG. 8 is a flowchart for determining the strong / weak mode of the vacuum cleaner. In addition, about the same component as the vacuum cleaner in the past and the said 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the present embodiment, the difference from the first embodiment is that the mode transition judgment pattern preset in the microcomputer 20 is the same in the strong mode and the weak mode as shown in Table 2, and the mode judgment transition is performed. Every time pattern 1 of the pattern is input to V1, the strong mode and the weak mode are sequentially switched.

  The microcomputer 20 has mode transition judgment patterns for transition to strong mode and weak mode and transition to stop mode individually for pattern 1 and pattern 2, and as shown in Table 3 in each mode. , Is set to perform mode transition.

  In Table 3, when the pattern 1 signal is input to V1 in the stop mode, the mode is changed to the weak mode. In the transition and operation modes, the strong mode and the weak mode are switched each time the pattern 1 signal is input. To work. In the present embodiment, there are only two operation modes, the strong mode and the weak mode. However, when there are three or more operation modes, the order of transition is set in the microcomputer 20 in advance. If this is the case, only the pattern 1 can be used to switch the operation mode.

  In FIG. 7, the flow of mode transition determination will be described.

  In FIG. 7, up to step 8 is the same as the flow of mode transition determination (FIG. 3) described in the first embodiment. In step 9, if the time count is 0.3 seconds, phase 2 of pattern 1 is established, and the process proceeds to step 11 to determine the strong / weak mode. If it is not 0.3 second, the process proceeds to step 10, and it is confirmed whether the time count is 1 second. If it is 1 second, phase 2 of pattern 2 is established. Make a decision. In step 10, if the time count is not 1 second, it is determined that the signal input to V1 is not the mode transition determination pattern, the process proceeds to step 14 to clear the time count, and the mode transition determination is performed from step 1. Try again.

  After performing strong / weak mode determination and stop mode determination in step 11 and step 12, it is confirmed in step 13 whether the mode transition is confirmed or whether the mode determination is NG. If the mode transition is confirmed, the process is terminated.

  FIG. 8 shows a flowchart for determining the strong / weak mode. Pattern 1 in the present embodiment is the same as the pattern for shifting to the strong mode in the first embodiment. In FIG. The operation is the same as that up to Step 10 in Step 4.

  In step 11, the mode transition is confirmed. In step 11, it is confirmed whether the current mode is the weak mode. If it is the weak mode, the process proceeds to step 12, the transition to the strong mode is confirmed, and the process is terminated. If it is not the weak mode, the current mode is the strong mode or the stop mode, so that the process proceeds to step 13, where the transition to the weak mode is confirmed and the process is terminated.

  Further, the stop mode determination is the same as the stop mode determination in the first embodiment, and thus the description thereof is omitted.

  With the above configuration, the number of combinations of operations of repeating grounding and leaving the floor suction tool 9 for switching modes with respect to the number of operation modes is reduced, and operability can be improved.

  Although the transition to the stop mode is configured to be performed by inputting the V2 of the pattern 2 as shown in Table 3, only one stop mode is used as an independent mode transition determination pattern as shown in Table 3. Considering that it can be stopped by inputting the mode transition judgment pattern. Therefore, when it is desired to stop the vacuum cleaner, it can be stopped immediately from any operation mode, and safety can be ensured.

(Embodiment 3)
FIG. 9 is a diagram for explaining the movement of the floor suction tool of the electric vacuum cleaner according to the third embodiment of the present invention. In addition, about the same component as the conventional vacuum cleaner and the vacuum cleaner in the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In FIG. 9, the difference from the first embodiment is that the roller 24 is arranged in front of the suction port body 21.

  Below, operation | movement of the vacuum cleaner in this Embodiment is demonstrated.

  When the user performs a cleaning operation while gripping the grip portion 8 and the extension pipe 5, the floor suction tool 9 moves back and forth on the floor surface. At this time, when there is a step on the floor surface, or when the carpet surface is cleaned, the floor suction tool 9 may momentarily float from the floor surface depending on the type of the carpet.

  Further, when the user performs cleaning while moving the floor suction tool 9 back and forth, the user's standing position does not change, so the floor suction tool 9 is located far from the user's position. The angle between the floor surface and the extension pipe 5 changes, and the angle is large (obtuse angle) when it is close, and small (acute angle) when it is far away. When the angle is small, the angle formed between the suction port body 21 and the joint portion 23 is also small and close to a straight line. The height at which the user is gripping the grip portion 8 or the extension pipe 5 is almost fixed by the user's physique if the grip position is fixed, so the floor suction tool 9 is far away. At the position, the floor suction tool 9 is easily lifted by the gripping height. For this reason, in particular, when there is a step or the like at a distant position, the possibility of instantaneous lifting increases.

  At this time, the suction port body 21 and the joint portion 23 are rotatable, and the joint portion 23 is connected to the extension pipe 5, so that the rear side of the suction port body 21 is more easily lifted.

  However, according to the present embodiment, as shown in FIG. 9, the roller 24 is disposed in front of the suction port body 21, and the rear side of the suction port body 21 is momentarily raised in the above situation. However, since the front is grounded, the open / close switch 18a can maintain the closed circuit state, prevent the signal input to V1 unintended by the user, and if the user wants to switch the mode, the suction mouth 21 By lifting the entire floor suction tool 9 so that both the front and rear of the floor are lifted, the mode transition determination pattern can be generated in V1, so that the accuracy of the mode transition determination can be particularly improved.

  As described above, the vacuum cleaner according to the present invention can be cleaned while eliminating wasteful movements, and can be gripped by a high-value-added and high-functional vacuum cleaner that reduces fatigue during cleaning, and further by a user. It is also a useful technology for the equipment used.

The circuit block diagram of the vacuum cleaner in Embodiment 1 of this invention Side cross-sectional view of the vacuum cleaner floor suction tool Flow chart of mode transition judgment of the vacuum cleaner Flow chart of strong mode judgment of the vacuum cleaner Flowchart of weak mode judgment of the vacuum cleaner Flowchart for determining the stop mode of the vacuum cleaner Flowchart of mode transition determination of electric vacuum cleaner in embodiment 2 of the present invention Flow chart of strong / weak mode judgment of the vacuum cleaner The figure explaining the movement of the suction tool for floors of the vacuum cleaner in Embodiment 3 of this invention Schematic configuration diagram of a conventional vacuum cleaner Circuit diagram of a conventional vacuum cleaner

Explanation of symbols

2 Electric blower 9 Floor suction tool (suction tool)
DESCRIPTION OF SYMBOLS 11 Electric motor 14 Control means 18 Closing means 18a Open / close switch (closing means, contact detection means)
20 Microcomputer (mode determining means)
21 Suction port body 23 Joint part 24 Roller (closing means, contact detection means)

Claims (6)

A vacuum cleaner body including an electric blower that generates suction air, a suction tool for sucking dust on the surface to be cleaned, an intake path that guides suction air sucked from the suction tool to the vacuum cleaner body, Contact detecting means provided in the suction tool for detecting contact with the surface to be cleaned of the suction tool, control means for controlling the power supplied to the electric blower having a plurality of modes with different power supplies, and a mode A combination of a signal at the time of contact with the surface to be cleaned of the suction tool and a signal at the time of non-contact from each of the plurality of modes. A vacuum cleaner that determines a mode corresponding to the combination when the combination is set in advance. The mode determining means determines to switch a plurality of modes in a preset order, and a combination of a signal at the time of contact with the surface to be cleaned and a signal at the time of non-contact input from the contact detection means is predetermined. The vacuum cleaner according to claim 1, wherein the mode is switched at the time of combination. A timer means for measuring time, and the mode determining means is a signal at the time of contact with the surface to be cleaned of the suction tool and a signal at the time of non-contact input from the contact detection means within a predetermined time measured by the timer means. The vacuum cleaner according to claim 1, wherein the determination is based on a combination of the above. The suction tool is a floor suction tool that sucks dust on the floor surface, and the floor suction tool is attached to the suction mouth body having an opening on the floor surface side and one end communicating with the suction mouth body. The other end of which is connected to and connected to the intake passage, the suction port body and the joint portion are configured to be rotatable, and contact detection means is provided at the rear of the suction port body. The vacuum cleaner of any one of Claims 1-3. The suction tool is a floor suction tool that sucks dust on the floor surface, and the floor suction tool is attached to the suction mouth body having an opening on the floor surface side and one end communicating with the suction mouth body. The other end of which is connected to and connected to the intake passage, the suction port body and the joint portion are configured to be rotatable, and a contact detection means is provided in front of the suction port body. The vacuum cleaner of any one of Claims 1-3. The suction tool is a floor suction tool that sucks dust on the floor surface, and is electrically connected to a rotary brush that sweeps up dust on the floor surface, an electric motor that rotationally drives the rotary brush, and a vacuum cleaner body, and A power line for supplying electric power to the electric motor, and an open / close switch that is arranged in the middle of the power line and that closes when the floor suction tool is grounded to the floor surface, the open / close switch as a contact detection means The vacuum cleaner according to any one of claims 1 to 5.

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