JP2012024188A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner in which an electric fan is controlled by suitably discriminating between continuation and interruption of a cleaning motion by suppressing detection of vibration not accompanied by a motion in cleaning.SOLUTION: The vacuum cleaner includes a vacuum cleaner body 5 with an embedded electric fan 9, a hose 4 whose one end is attached to the vacuum cleaner body 5, a hand hose 3 attached to the other end of the hose 4, an extension pipe 2 attached to the hand hose 3 to communicate with the hose 4, and a suction tool 1 attached to the extension pipe 2. The vacuum cleaner further includes a cleaning state detecting sensor part 31 set on the hand hose 4 to detect vibration in the hand hose 4 and control means 29 to control the electric fan 9 on the basis of the output of the cleaning state detecting sensor part 31. The cleaning state detecting sensor part 31 is supported to a casing of the hand hose 4 via an elastic body 56 having an elastic constant smaller than that of the casing of the hand hose 3.

Description

  The present invention relates to a vacuum cleaner with a built-in electric blower, and in particular, by detecting the movement of the hand operating unit as vibration, the user is performing a cleaning operation or the electric blower and the brush motor are driven while being cleaned. The present invention relates to an electric vacuum cleaner that determines whether or not the operation is interrupted and controls an electric blower based on the determination result.

  The electric vacuum cleaner generally adjusts the suction amount of the electric blower with an operation switch attached to the hand operation unit, but the cleaning operation detection means provided in the grip part (hand operation unit) and the cleaning operation By providing control means for controlling the driving of the electric blower by the detection means, noise and unnecessary power when the cleaning operation is interrupted are reduced.

  As shown in FIGS. 16 (a) and 16 (b), the conventional cleaning operation detecting means is provided on a substantially cylindrical rectangular portion 46 and an inner bottom surface of the rectangular portion 46 through a predetermined gap. A pair of electrodes 47 and 47 facing each other and a rolling element 48 disposed between the electrodes 47 and 47 so as to be movable in the rectangular portion 46 are provided. The rolling element 48 is formed in a substantially cylindrical shape having one end surface formed in a hemispherical shape, and a conductor 49 is provided in a ring shape on the other surface. 47, 47 is electrically connected, and the electrode 47, 47 is electrically opened when the gripping part 13 is tilted or tilted so that the rolling element 48 is tilted due to forward / backward movement during cleaning. (See Patent Document 1).

Japanese Patent Laid-Open No. 2000-196 (page 4, FIG. 5, FIG. 6)

  The conventional cleaning operation detecting means of the electric vacuum cleaner is configured as described above, and has the following problems. For example, there are cases where cleaning is interrupted without stopping the rotation of the electric blower or brush motor, such as standing on the floor, desk, wall or main body of the vacuum cleaner while the vacuum cleaner is in operation. is there. At this time, the vibration generated by the electric blower, the brush motor, and the rotating brush being driven may be transmitted to the cleaning operation detection means via the floor, desk, wall, etc., or via a hose, extension pipe, or the like. In addition, the air flow generated by the electric blower that is driving and flowing in the hose near the hand control unit creates vortices inside the hose and extension pipe, and vibrations generated by colliding with the inner wall cause the hose and extension. It may be transmitted to the cleaning operation detection means via a pipe or the like. Furthermore, vibration generated by dust sucked together with the airflow colliding with the inner wall of the extension pipe or hose may be transmitted to the cleaning operation detecting means via the hose or extension pipe. As described above, when the cleaning is interrupted while the user is driving the electric blower, the cleaning operation detecting means detects the vibration not accompanied by the user's cleaning operation, and the cleaning operation is interrupted. In spite of being inside, there was a problem that it was erroneously determined that the cleaning operation was continuing.

  The present invention solves such a problem, and suppresses detection of vibrations that are not accompanied by an operation during cleaning, thereby appropriately discriminating whether the cleaning operation is being continued or interrupted to control the electric blower. The purpose is to provide.

  An electric vacuum cleaner according to the present invention includes an electric vacuum cleaner main body incorporating an electric blower, a hose having one end attached to the electric vacuum cleaner main body, a hand hose attached to the other end of the hose, and the hand hose In a vacuum cleaner having an extension pipe that is attached to the hose and a suction tool attached to the extension pipe, a cleaning state detection sensor unit that is provided in the hand hose and detects vibration in the hand hose; Control means for controlling the electric blower based on the output of the cleaning state detection sensor unit, the cleaning state detection sensor unit is supported via an elastic body with respect to the housing of the hand hose, The elastic constant of the elastic body is smaller than the elastic constant of the housing of the hand hose.

  According to the electric vacuum cleaner of the present invention, the cleaning state detection sensor unit for detecting the vibration in the hand hose is supported via the elastic body with respect to the housing of the hand hose, and the elastic constant of the elastic body is the housing of the hand hose. Since it is smaller than the elastic constant of the body, it provides a vacuum cleaner that controls the electric blower by properly detecting whether the cleaning operation is ongoing or interrupted by suppressing the detection of vibrations that are not accompanied by the operation during cleaning. can do.

It is an external appearance perspective view of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a perspective view of the state where the dust collecting part was removed from the cleaner body of the electric vacuum cleaner concerning Embodiment 1 of this invention. It is sectional drawing of the state which removed the dust collection part from the cleaner body of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a general-view perspective view of the hand hose in the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the hand hose in the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a figure explaining the support method of the cleaning state detection board | substrate of the hand hose in the vacuum cleaner which concerns on Embodiment 1 of this invention. It is the II sectional view taken on the line of FIG. 6 explaining the method for supporting the cleaning state detection board of the hand hose in the electric vacuum cleaner according to Embodiment 1 of the present invention. It is sectional drawing explaining the internal structure of the cleaning condition detection sensor provided in the cleaning condition detection board | substrate of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a figure explaining the method to attach the cleaning condition detection sensor of the vacuum cleaner which concerns on Embodiment 1 of this invention to a cleaning condition detection board | substrate. It is a schematic diagram explaining the movement of the cleaning state detection board | substrate of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a circuit block diagram of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a figure explaining the generation | occurrence | production method of the detection signal of the cleaning state detection sensor of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the hand hose in the vacuum cleaner which concerns on Embodiment 2 of this invention. It is a figure explaining the support method of the cleaning state detection board | substrate in the vacuum cleaner which concerns on Embodiment 2 of this invention. It is a figure explaining arrangement | positioning of the cleaning state detection board | substrate in the vacuum cleaner which concerns on Embodiment 3 of this invention. It is a figure explaining the structure of the cleaning state detection sensor in the conventional vacuum cleaner.

  Hereinafter, a vacuum cleaner according to the present invention will be described with reference to the drawings. Here, although the vacuum cleaner which comprises a cyclone separation type dust collector is demonstrated as an example, it is not limited to this. For example, the present invention is similarly applied to a vacuum cleaner having a vertical cylindrical cyclone dust collection unit or a vacuum cleaner having a paper pack type dust collection unit even in the same cyclone separation type dust collector. It is something that can be done.

Embodiment 1 FIG.
[Configuration of vacuum cleaner]
FIG. 1 is an external perspective view of a vacuum cleaner according to the present invention. As shown in FIG. 1, the vacuum cleaner 100 includes a suction tool 1, an extension pipe 2, a hand hose 3, a hose 4, and a cleaner body 5. The suction tool 1 sucks dust on the floor and the like together with air. A rotating brush (not shown) that sweeps up dust on the surface to be cleaned such as a floor surface and a carpet, and an electric motor 19 that is a brush motor for driving the rotating brush are incorporated. The rotating brush has a flocking (not shown) that contacts the surface to be cleaned and scrapes off dust. The rotating brush is driven by an electric motor 19 via a belt or the like.

  One end of a straight cylindrical extension pipe 2 is connected to the outlet side of the suction tool 1. The other end of the extension pipe 2 is connected to one end of a hand hose 3 provided with a handle provided with an operation switch 8 for controlling the operation of the vacuum cleaner 100. The operation switch 8 is a switch for switching between the strength of the suction air of the electric blower 9 and the stop. One end of a flexible bellows-like hose 4 is connected to the other end of the hand hose 3. Further, the cleaner body 5 is connected to the other end of the hose 4.

  A wheel 6 is provided at the rear portion of the cleaner body 5, and the cleaner body 5 is movable by a front caster (not shown) and a wheel 6 provided on the front lower surface of the cleaner body 5. Moreover, the power supply cord 7 is connected to the cleaner body 5, and the power supply cord 7 is connected to an external power supply to energize, and the electric blower 9 (see FIG. 3) is driven to perform a suction operation. The suction tool 1, the extension pipe 2, the hand hose 3, and the hose 4 constitute a part of a suction path for allowing dust-containing air, which is air containing dust, to flow from the outside to the inside of the cleaner body 5.

  By operating the operation switch 8 and driving the electric blower 9 and the electric motor 19, dust on the surface to be cleaned is scraped up by the suction tool 1, transported to the extension pipe 2, the hose 4, and the electric vacuum cleaner 100. Dust is collected in a dust collection chamber 20 built in the machine body 5. Then, the suction air is discharged from the electric vacuum cleaner main body 5.

  FIG. 2 is a perspective view of the cleaner body 5 and shows a state in which the dust collecting unit 20 is removed. FIG. 3 is a cross-sectional view of the cleaner body 5 and is a cross-sectional view taken along a vertical cross-sectional line passing through the main body inlet 17. As shown in FIGS. 2 and 3, the cleaner body 5 includes a main body case 10, a dust collecting unit 20, and a connection component 30.

  A main body case 10 constituting the outer shell of the vacuum cleaner main body 5 includes a lower case 11 that opens at the top and accommodates the electric blower 9 and various control boards (not shown), and an upper case 12 that covers the opening of the lower case. And a hose connection port 13 to which the hose 4 can be connected. The hose connection port 13 is an inlet for air sucked into the cleaner body 5. The upper surface of the upper case 12 is configured to have a shape on which the dust collection unit 20 can be placed.

  The main body pipe 14 is made of various resins and has a function of connecting the hose connection port 13 to which the hose 4 is connected and the dust collecting portion 20. The main body pipe 14 is placed on the main body case 10 along the longitudinal direction of the substantially cylindrical dust collecting portion 20. A dust collector connection port 15 is opened at the end of the main body pipe 14 on the side connected to the dust collector 20.

  The exhaust hole 16 is composed of a large number of holes provided to exhaust the exhaust from the electric blower 9 to the outside, and is arranged at a position that is substantially symmetrical with the main body pipe 14 around the dust collection portion 20.

  A main body inlet 17 is opened at a position on the upper surface of the upper case 12 and almost directly above the electric blower 9. The air flowing out from the dust collection unit 20 passes through the main body inlet 17 and is sucked into the electric blower 9 built in the main body case 10.

  The dust collecting unit 20 collects dust contained in the air sucked by the suction force of the electric blower 9, and is connected to the electric blower 9 from the hose connection port 13 that is an inlet of sucked air to the cleaner body 5. It constitutes a part of the leading suction path. The dust collection method of the dust collection unit 20 may be either a cyclone method or a paper pack method. The dust collection unit 20 is a box having a substantially cylindrical outer shell as a whole, and a swirl chamber and a dust collection chamber for collecting dust by a cyclone method are provided therein. The dust collector 20 has a dust collector inlet 21 as an air inlet to the dust collector 20 and a dust collector outlet 22 as an air outlet from the dust collector 20. Moreover, the dust collection part fixing | fixed part 23 for attaching the dust collection part 20 to the main body case 10 so that attachment or detachment is possible is provided. The dust collection part fixing part 23 is formed in, for example, a bowl shape, and the dust collection part 20 is engaged with the dust collection part fixing hole 18 formed in the main body case 10 so that the dust collection part 20 is engaged with the main body case 10. Can be attached to.

  A primary filter 41 and a secondary filter 42 are provided in the main body case 10 on a path from the main body inlet 17 to the electric blower 9. The primary filter 41 and the secondary filter 42 are for collecting fine dust contained in the air discharged from the dust collection unit 20. Dust contained in the air sucked into the vacuum cleaner body 5 is basically collected by the dust collecting unit 20, but fine dust that could not be collected by the dust collecting unit 20 is transferred to the electric blower 9. In order to prevent suction, a primary filter 41 and a secondary filter 42 are provided. The primary filter 41 and the secondary filter 42 are comprised by the nonwoven fabric formed in the honeycomb shape, the corrugated shape, the pleat shape, and the flat plate shape, for example. The secondary filter 42 has a finer filter than the primary filter 41, and fine dust that has passed through the primary filter 41 is collected by the secondary filter 42.

[Configuration of cleaning state detection sensor]
Next, a cleaning state detection sensor which is a main part of the present invention will be described with reference to FIGS.
4 is an external perspective view showing the hand hose 3 according to Embodiment 1 of the present invention, FIG. 5 is a longitudinal sectional view of FIG. 4, and the hand hose 3 includes a connecting pipe 51, a grip part 52, and a lid part 53. Consists of. The connecting pipe 51 is composed of a hose connecting part 51a to which the hose 4 is connected and an extension pipe connecting part 51b to which the extension pipe 2 is connected, and 54 is a hose cover that is divided into two vertically. The cleaning state detection sensor 32 is built in the hand hose 3.

FIG. 6 is an enlarged view of a main part for explaining a method of supporting the cleaning state detection sensor 32 of FIG. 5, and FIG.
As shown in FIGS. 5, 6, and 7, the cleaning state detection substrate 58 on which the cleaning state detection sensor 32 is mounted has a support wall on the opposite side (back surface) to the surface on which the cleaning state detection sensor 32 is mounted. 59 (a part of the damper means) is slidably contacted in a direction (Z direction) perpendicular to the paper surface. In addition, the cleaning state detection board 58 has a lower end rib 55 (part of damper means, guide wall) protruding from the connecting pipe 51 toward the lid portion 53 side in the Z direction with the step bottom surface 55a and the step portion side surface 55b. The upper end is supported by an upper pressing holder 56 (elastic body) made of an elastic body such as urethane. The lower pressing rib 55 and the support wall 59 are damper means that suppresses the movement of the cleaning state detection board 58 by generating a frictional force proportional to the moving speed of the cleaning state detection board 58 with respect to the cleaning state detection board 58. The upper presser retainer 56 is supported (via the upper presser rib 57) by an upper presser rib 57 that protrudes toward the connecting pipe 51 from the lid 53 that constitutes a part of the housing of the hand hose 3. The upper pressing holder 56 may be adhered to either or both of the cleaning state detection substrate 58 and the upper pressing rib 57 with a double-sided tape or the like.

  FIG. 8 is a cross-sectional view illustrating the internal structure of the cleaning state detection sensor 32 provided on the cleaning state detection board 58. FIG. 8A shows a movable section when the cleaning state detection sensor 32 is held in a vertical position (Y direction), and FIG. 8B shows a movable section when the cleaning state detection sensor 32 is held in a horizontal position. 40 states are shown. FIG. 9 is a diagram illustrating attachment of the cleaning state detection sensor 32 and the cleaning state detection substrate 58.

  The cleaning state detection sensor 32 includes two substantially concave electrodes 37 including substantially circular electrode plane portions 37c and 38c and electrode side surface portions 37a, 37b, 38a, and 38b in which outer edges of the electrode plane portions 37c and 38c are raised. , 38 and a conductive, for example, spherical movable contact piece 40 (movable body), and the two substantially concave electrodes 37, 38 are arranged on the concave side so as to be substantially parallel with a gap therebetween. Opposite. The outsides of the two electrodes 37 and 38 are fixed by a mold 39. The movable section 40 is disposed so as to be able to roll or slide in an operation space 39 on a substantially cylinder formed by two substantially concave electrodes 37 and 38. When the electrode side surface portions 37 a and 38 a or 37 b and 38 b of the two substantially concave electrodes 37 and 38 are conducted through the movable piece 40, the signal of the cleaning state detection sensor 32 is output. A method for outputting this signal will be described later. Thus, since the cleaning state detection sensor 32 having the movable body 40 that is displaced based on the moving direction of the hand hose 3 during the cleaning operation of the electric vacuum cleaner 100 is provided, the vibration of the cleaning state detection sensor 32 can be performed with a simple configuration. Can be detected.

  When the cleaning state detection sensor 32 is arranged as shown in FIG. 8A, the movable contact piece 40 is mainly in the Z direction with respect to the moving direction (Z direction) of the hand hose 3 during the cleaning operation of the electric vacuum cleaner 100. Moving. The periphery of the electrode side surfaces 37a, 37b, 38a, 38b is circular, and the movable contact piece 40 moves in the YZ plane. During this movement, the movable contact piece 40 may be separated from the electrode 37 or 38, and at this moment, the conduction between the electrodes 37 and 38 is cut off. On the other hand, when the cleaning state detection sensor 32 is arranged as shown in FIG. 8B, the movable contact piece 40 also moves in this case with respect to the moving direction (Z direction) of the hand hose 3 during the cleaning operation of the electric vacuum cleaner 100. Moves mainly in the Z direction on the surface of the electrode plane portion 37c. However, since the diameter of the movable contact piece 40 is smaller than the distance between the electrode plane portions 37 c and 38 c, it is difficult to conduct the electrodes 37 and 38 through the movable contact piece 40 when the movable contact piece 40 moves. Therefore, if the cleaning state detection sensor 32 is arranged as shown in FIG. 8A, it is easy to detect vibrations in the direction in which the hand hose 3 moves.

  The cleaning state detection sensor 32 has the electrode hose 3 in the vertical direction (Y direction) when the hand hose 3 is arranged so that the lid 53 is on the upper side (in the case of FIGS. 8A and 9). It is parallel and the direction (X direction) which the electrodes 37 and 38 oppose becomes a direction orthogonal to the front-back direction (Z direction) which a user reciprocates the hand hose 3 with the grip part 52 during cleaning. Further, it is attached to the vibration detection board 58. Lead wires 37d and 38d are connected to the electrode side surface portions 37a and 37b of the electrode 37 and the electrode side surface portions 38a and 38b of the electrode 38, respectively. The cleaning state detection sensor 32 is attached to the cleaning state detection board 58 by soldering the lead wires 37d and 38d and the cleaning state detection board 58. The cleaning state detection sensor 32 may be attached to the cleaning state detection substrate 58 by fixing the mold 39 to the cleaning state detection substrate 58 with a screw or the like.

  The cleaning state detection sensor 32 is placed on the vibration detection board so that the opposing direction (X direction) of the electrodes 37 and 38 of the cleaning state detection sensor 32 matches the normal direction (X direction) of the mounting surface of the vibration detection board 58. When attached to 58, the vibration detection board 58 is supported inside the hand hose 3 so that the normal direction of the mounting surface of the vibration detection board 58 is the left-right direction perpendicular to the front-rear direction in which the hand hose 3 is reciprocated. Is done. By arranging the vibration detection board 58 and the cleaning state detection sensor 32 in this way, the cleaning state detection sensor is detected against the movement in the front-rear direction (Z direction) that is the reciprocating direction of the hand hose 3 of the user during cleaning. The 32 movable contact pieces 40 are swung in the YZ plane around the front-rear direction (Z direction) in the operation space 64. That is, the movable piece 40 is displaced in the operation space 39 based on the moving direction of the hand hose 3 during the cleaning operation of the electric vacuum cleaner 100.

[Configuration of electrical circuit]
FIG. 11 is a circuit configuration diagram of the electric vacuum cleaner according to Embodiment 1 of the present invention.
The vacuum cleaner of the present embodiment is composed of four blocks: a vacuum cleaner body 5, a hand hose 3 + hose 4, an extension pipe 2, and a suction tool 1.

  In FIG. 11, 24 is a commercial AC power source, 25 is a 15 A current fuse, and is a protective device when the electric blower 9 becomes locked or when it becomes abnormal due to a short circuit. Reference numeral 26 denotes a 4A current fuse, which is a protective device when the electric motor 19 is locked or when an abnormality occurs due to a short circuit.

  In the block of the cleaner body 5, reference numeral 27 denotes a DC power supply device whose input side is connected to the electrolytic capacitor C1 and outputs a predetermined DC voltage from the output side. D1 is a diode that rectifies the output of the commercial AC power supply 24, 28 is a constant voltage power supply that is connected to the electrolytic capacitor C2 on the input side and outputs a predetermined constant voltage from the output side, and C2 suppresses oscillation of the constant voltage power supply 28. Electrolytic capacitor for C3 is an electrolytic capacitor for stabilizing the output of the constant voltage power supply 28. The constant voltage power supply 28 supplies a 5 V voltage to the microcomputer (control means) 29, the hand switch 8, the cleaning state detection sensor unit 31, and the cleaning state detection means 33. Reference numeral 34 denotes a triac (bidirectional thyristor) for driving the electric blower 9 built in the cleaner body 5. Reference numeral 35 denotes an electric motor 19 drive triac (bidirectional thyristor) for driving the electric motor 19. Reference numeral 36 denotes a safety switch for stopping a rotating brush (not shown) when the suction tool 1 is lifted into the air.

  The operation switch 8 and the cleaning state detection sensor unit 31 are included in the block of the hose 4 + the hand hose 3. Three piano wires are built in the hose 4 and serve also as signal wires.

The operation switch 8 includes switches SW1 to SW4 and resistors R6 to R10.
SW1 is a switch for turning the electric motor 19 off and on. SW2 is an ECO mode operation switch that controls the electric blower 9 and the electric motor 19 so as to suppress the unnecessary power supply during the cleaning operation interruption by detecting the interruption state of the cleaning operation and the restarting state of the cleaning operation of the present invention. is there. The ECO mode operation switch includes an ECO strong mode and an ECO weak mode, which can be switched by pressing the switch. In the ECO strong mode, the power consumption is about 1000 W during the cleaning operation, and when the cleaning operation interruption is detected, the power consumption is reduced to about 100 W and the electric motor 19 is stopped. When the cleaning operation resumption state is detected from the cleaning operation interruption detection state (power consumption of about 100 W), the power consumption is increased to about 1000 W and the electric motor 19 is rotated. SW3 is a standard mode operation switch that controls the electric blower 9 and the electric motor 19 without detecting the interrupted state of the cleaning operation and the restarted state of the cleaning operation of the present invention. The standard mode operation switch includes a standard strong mode and a standard weak mode, which can be switched by pressing the switch. In the standard strong mode, the electric power is operated at a constant power of about 1000 W, and the electric motor 19 is rotated. In the standard strong mode, the motor 19 is rotated by operating at a constant power consumption of about 500 W. SW 4 is a switch for stopping the electric blower 9 and the electric motor 19.

  When the switches SW1, SW2, SW3, and SW4 are pressed (ON), the circuits of the resistors R7, R8, R9, and R10 connected in series with the respective switches are closed. When the pressure is released, the switches SW1, SW2, SW3, SW4 open a circuit with resistors R7, R8, R9, R10 connected in series with the respective switches. Therefore, only the circuit of the resistor R6 is closed when the switches SW1, SW2, SW3, and SW4 are not pressed.

  Depending on the combination of the ON states of the switches SW1 to SW4, the partial pressure of the resistors R4 and R6 incorporated in the circuit on the cleaner body 5 side (when the switches SW1 to SW4 are all OFF), or R6 and R7, R8, The input voltage of the microcomputer 29 changes due to the parallel resistance of R9 and R10 and the voltage division of R4 (when any of the switches SW1 to SW4 is ON). The microcomputer 29 determines the operation mode according to this input voltage, and controls the power supplied to the electric blower 9 and the electric motor 19 according to the ON state of the switches SW1 to SW4 of the operation switch 8.

  A cleaning state detection sensor unit 31 includes a cleaning state detection sensor 32. Each resistor connected to the operation switch 8 and the resistor R5 connected to the cleaning state detection sensor 32 are connected in parallel, and connected to the minus terminal of the comparator CP provided on the electric vacuum cleaner body 5 side and the microcomputer 29. The The output of the operation switch 8 and the output of the cleaning state detection sensor 32 are superimposed on one wire in the hose 4 and connected to the negative terminal of the comparator CP. The cleaning state detection means 33 is a circuit that makes the signal voltage obtained by superimposing the output of the operation switch 8 and the output of the cleaning state detection sensor only the output of the cleaning state detection sensor. R1 is a pull-up resistor, R2 is a voltage dividing resistor that generates a reference voltage for the comparator CP.

FIG. 12 is a diagram for explaining a method of generating a detection signal of the cleaning state detection sensor 32.
When the two electrodes 37 and 38 of the cleaning state detection sensor 32 are connected via the movable contact piece 40, the resistor R5 connected in series to the cleaning state detection sensor 32 and the parallel resistance on the operation switch 8 side are in parallel. Connected. A voltage obtained by dividing the DC voltage supplied from the constant voltage power supply 28 is supplied to the comparator CP and the microcomputer 29 by the parallel combined resistor and the resistor R4 provided on the cleaner body 5 side.

  On the other hand, if the movable contact piece 40 of the cleaning state detection sensor 32 does not come into contact with at least one of the two electrodes 37 and 38, the conduction between the two electrodes 37 and 38 is cut off, and the circuit of the resistor R5 is opened. As a result, a voltage obtained by dividing the DC voltage supplied from the constant voltage power supply 28 by the parallel resistance on the operation switch 8 side and the resistance R4 provided on the cleaner body 5 side is supplied to the microcomputer 29 serving as the comparator CP. . This voltage is different from the voltage when the movable movable contact piece 40 conducts between the two electrodes 37 and 38.

Next, the operation will be described.
When using the vacuum cleaner 100, the dust collector connection port 15 and the dust collector inlet 21 are connected, and the main body inlet 17 and the dust collector outlet 22 are connected to collect the dust. The part 20 is placed on the upper surface of the main body case 10, and the dust collection part 20 is fixed to the main body case 10 by the dust collection part fixing part 23 and the dust collection part fixing hole 18. When the operation switch 8 is operated to drive the electric blower 9 accommodated in the main body case 10, the dust-containing air sucked by the suction force of the electric blower 9 passes through the hose connection port 13 to the main body pipe 14. It enters and passes through the dust collector connection port 15 and the dust collector inlet 21 and is taken into the dust collector 20. Dust contained in the air taken into the dust collector 20 is collected by the dust collector 20. The air after the dust is collected by the dust collector 20 enters the main body case 10 through the dust collector outlet 22 and the main body inlet 17 and passes through the primary filter 41 and the secondary filter 42. . At this time, fine dust contained in the air is collected by the primary filter 41 and the secondary filter 42. The air that has passed through the primary filter 41 and the secondary filter 42 reaches the electric blower 9 and is exhausted from the exhaust hole 16 through an internal passage (not shown). When dust collects in the dust collection unit 20, the dust collection unit 20 is detached from the main body case 10 and the collected dust is discarded.

  In the hand hose 3 and the cleaning state detection sensor 32, the electrically conductive movable contact piece 40 is straddling the opposing electrodes 37 and 38, and is an electrically closed circuit unless external vibration is applied. Form. When vibration from the outside is applied to the cleaning state detection sensor 32, the movable contact piece 40 is released from one or both of the electrodes 37 and 38, and the circuit is instantaneously opened, but immediately straddles the electrodes 37 and 38. Touching and closing the circuit is repeated.

  In addition, when the hand hose 3 provided with the cleaning state detection sensor 32 changes its inclination with respect to the floor surface due to a back-and-forth motion or a change in the cleaning posture accompanying the cleaning operation, the movable contact piece 40 is applied to the electrode side surfaces 37a and 38a by its own mass. The arcuate inertial movement is performed, and the movable contact piece 40 and the electrodes 37 and 38 keep the same positional relationship as when the hand hose 3 is not moving as described above.

  On the other hand, in the hand hose 3 in a state where the cleaning operation is interrupted, for example, the hand hose 3 and the extension pipe 2 are stood against a desk, a wall, or the electric vacuum cleaner 100, and the moving motion associated with the cleaning operation is eliminated, The movable contact piece 40 and the electrodes 37 and 38 form a closed circuit or become an open circuit, and the state is maintained. For example, if the circuit is stationary in the state of FIG. 8A, the circuit is maintained in a closed state. Further, as shown in FIG. 8B, if the stationary state is obtained by rotating 90 degrees around the Z axis, the movable contact piece 40 does not contact the electrode 38, and the circuit is maintained in an open state. .

  When the cleaning operation is interrupted, if the electric vacuum cleaner is interrupted while driving the electric blower 9 or the electric motor 19 which is a brush motor, the electric blower 9 or the electric motor 19 being driven and the rotating brush are generated. The vibration may be transmitted to the cleaning operation detection sensor 32 through the floor, desk, wall, or the like, or through the hose 4 or the extension pipe 2. In addition, the airflow generated by the electric blower 9 being driven and flowing in the hose 4 near the hand hose 3 causes vortices inside the hose 4 and the extension pipe 2, and also to the inner walls of the hose 4 and the extension pipe 2. The vibration generated by the collision may be transmitted to the cleaning operation detection sensor 32 through the hose 4 or the extension pipe 4.

  The vibration transmitted to the cleaning operation detection sensor 32 is transmitted via the cleaning state detection board 58 on which the cleaning operation detection sensor 32 is mounted. Here, as shown in FIGS. 6 and 7, the cleaning state detection substrate 58 is disposed on the opposite side (back surface) of the surface on which the cleaning state detection sensor 32 is mounted (in the direction perpendicular to the support wall 59 and the paper surface (Z direction)). ) Is slidably contacted. Further, the upper end of the cleaning state detection substrate 58 is supported by an upper presser holding member 56 that is an elastic body, and the lower end is in contact with the stepped bottom surface 55a of the lower presser rib 55 so as to be slidable in the Z direction.

  A motion model of the cleaning state detection board 58 is shown in FIG. The cleaning state detection board 58 including the cleaning operation detection sensor 32 is modeled with a mass point of weight m. The mass point of weight m is supported by the walls on both sides via an elastic body having an elastic constant k and a damper having a friction coefficient μ, and vibrates in the Z direction. An elastic body having an elastic constant k represents the upper presser holding member 56 whose elastic constant in the Z direction is k. Further, the damper having the friction coefficient μ represents the cleaning state detection substrate 58, the support wall 59 and the lower pressing rib 55 that slide in the Z direction, and the combined friction coefficient thereof is μ.

As is well known, the equation of motion when a vibration as an external force F is applied to the mass point of the weight m of the motion model of FIG. 10 in the Z direction can be expressed as follows, where time is t.
md ² Z / dt ² = −μdZ / dt−kZ + F (Formula 1)
The left side is the product of the second order derivative with respect to the mass m of the mass point and the time t of Z, the first term on the right side is the friction force, the product of the velocity of the mass point (the first order derivative with respect to the time t of Z) and the friction coefficient, the right side The second term is a restoring force, the product of the displacement in the Z direction from the equilibrium point of the mass point and the elastic constant, and the third term on the right side is an external force representing vibration, which is a periodic force that varies sinusoidally.

Equation 1 results in the following differential equation:
d ² Z / dt ² + 2bdZ / dt + (ω ₀ ) ² Z = F ₀ cos (pt) (Formula 2)
here,
2b = μ / m (Formula 3)
(Ω ₀ ) ² = k / m (Formula 4)
F = mF ₀ cos (pt) (Formula 5)
It is. As shown in Equation 5, the external force F is a vibration that changes sinusoidally at an angular frequency p (2π times the frequency of the external force F).

The solution of Equation 2 is as follows.
Z = Aexp (−bt) cos (ωt + α) + Bcos (pt−β) (Formula 6)
here,
ω ² = (ω ₀ ) ² −b ² (Expression 7)
B = F ₀ / √ ((ω ₀ ) ² −p ² ) ² + ( ² bp) ² ) (Formula 8)
tan (β) = 2 bp / ((ω ₀ ) ² −p ² ) (Formula 9)
It is. Exp in the first term on the right side of Equation 6 represents an exponential function with e as the base.

  The first term on the right side of Equation 6 is a general solution when there is no external force F, and represents the natural vibration (or free vibration) of the motion model of FIG. The angular frequency is ω, which is determined by m, k, and μ as expressed in Equation 7. The second term on the right side of Equation 6 is a special solution due to the external force F and represents forced vibration that vibrates at the same angular frequency p as the external force. The natural vibration of the first term on the right side decays exponentially with time regardless of the initial condition of motion, so that only the second term remains after a certain period of time. The attenuation of the natural vibration of the first term on the right side is caused by the friction coefficient μ according to Equation 3.

The amplitude B of the forced vibration in Expression 8 causes so-called resonance that increases (maximum) in the vicinity of p = ω _{0 because} b is small when the friction coefficient μ is small. As b increases, the maximum degree of resonance (sharpness of resonance) decreases. When the angular frequency p of the external force F is larger than ω ₀ , the amplitude B of the forced vibration attenuates in inverse proportion to the square of p according to Equation 8. On the other hand, as will be described later, in order to suppress the detection of vibrations not accompanied by the operation during cleaning, it is desirable to reduce the friction coefficient μ, and in this case, b in Expression 3 is reduced. Then, when the angular frequency p of the external force F is smaller than ω ₀ , the amplitude B of the forced vibration can be approximated to F ₀ / ω ₀ ² from Equation 8, and becomes a substantially constant value regardless of the value of p. . Therefore, in order to suppress the detection of vibrations that are not accompanied by the operation during cleaning, it is desirable to reduce the value of ω ₀ .

Here, the vibration accompanying the operation during cleaning is caused by the movement of the user's hand hose 3 in the front-rear direction (Z direction), and the period of this vibration (the time required for the hand hose 3 to reciprocate in the front-rear direction) is about It is considered to be about 1 to several seconds. Therefore, the angular frequency of vibration accompanying the operation during cleaning is about 0 to 6 [rad]. On the other hand, the lowest frequency among the frequencies of the electric blower 9, the rotating brush, and the rotating brush driving electric motor 19 during which cleaning is interrupted is considered to be vibration caused by the rotation of the rotating brush. If this rotation speed is 10 times / second, the angular frequency of vibration associated with the rotation of the rotating brush during the cleaning operation interruption is about 60 [rad]. Therefore, in order to suppress the detection of vibration during the cleaning operation interruption, it is desirable to select the value of ω ₀ smaller than 60. For this purpose, it is necessary to decrease the elastic constant k or increase the mass m as shown in Equation 4. In a vacuum cleaner that is required to be reduced in weight, it is not desirable to increase the mass m, and it is preferable to decrease the elastic constant of the upper pressing holder 56 that is an elastic body.

When the cleaning state detection substrate 58 is fixed to the housing of the hand hose 3 by screwing or bonding, the elastic body that supports the cleaning state detection substrate 58 becomes the housing of the hand hose 3 itself. The elastic constant of the housing of the hand hose 3 is remarkably larger than the elastic constant of urethane which is the upper presser holder 56, and the value of ω ₀ is also larger in the former than in the latter. Therefore, rather than fixing the cleaning state detection substrate 58 to the housing of the hand hose 3, the amplitude B of the forced vibration due to the high frequency external force is smaller when the upper holding holder 56 is supported. In other words, the vibration during the cleaning operation interruption, which is an external force having a high frequency, is absorbed by the upper pressing holder and is not easily transmitted to the cleaning state detection substrate 58 and the cleaning state detection sensor 32. As a result, it is possible to suppress detection of vibrations that are not accompanied by an operation during cleaning.

  During the cleaning operation, the hand hose 3 operated by the user undergoes a reciprocating motion in the front-rear direction (Z direction), and the time (cycle) required for the hand hose 3 to reciprocate in the front-rear direction is about 1 second to several seconds. . The cleaning state detection sensor 32 detects the vibration due to the reciprocating motion, and a signal of voltage change to the microcomputer 29 is output via the cleaning state detection sensor unit 31. Receiving this signal, the microcomputer 29 determines that it is currently performing a cleaning operation, and controls the operation set by the operation switch 8 for the electric blower 9 and the electric motor 19.

  Next, when the cleaning operation is interrupted while the electric blower 9 and the electric motor 19 are continuously driven, the vibration transmitted to the hand hose 3 is suppressed from being transmitted to the cleaning state detection board 58 and the cleaning state detection sensor 32, and the cleaning state is detected. The movable contact piece 40 in the sensor 32 is stationary in the operation space 64. Then, a voltage signal having no level change is output to the microcomputer 29 via the cleaning state detection sensor unit 31. Receiving this signal, the microcomputer 29 determines that the cleaning operation is currently suspended, and controls the electric blower 9 and the electric motor 19 to reduce or stop the supply power.

  In addition, when the cleaning operation is determined to be interrupted and the electric blower 9 and the electric motor 19 are controlled to reduce or stop the supply power, the user operates when the cleaning operation is started again. The hand hose 3 is reciprocated in the front-rear direction (Z direction) again. The cleaning state detection sensor 32 detects the vibration due to the reciprocating motion, and a signal of voltage change to the microcomputer 29 is output via the cleaning state detection sensor unit 31. The microcomputer 29 that has received this signal determines that the cleaning operation has been resumed, and controls the operation set by the operation switch 8 for the electric blower 9 and the electric motor 19.

  In the electric vacuum cleaner configured as described above, the cleaning state detection sensor unit is supported via the elastic body with respect to the housing of the hand hose, and the elastic constant of the elastic body is that of the housing of the hand hose. Since it is smaller than the elastic constant, it is possible to suppress detection of vibration during the cleaning operation interruption, which is vibration having a frequency higher than that of the hand hose during the cleaning operation.

  Moreover, since the cleaning state detection sensor has a movable body that is displaced based on the direction of movement of the hand hose during the cleaning operation of the vacuum cleaner, the vibration of the cleaning state detection sensor can be detected with a simple configuration.

  In addition, the hand hose is provided with a damper means for suppressing the movement of the cleaning state detection sensor unit based on the movement of the hand hose during the cleaning operation of the vacuum cleaner. It is possible to efficiently detect the movement of the cleaning state detection sensor unit with respect to vibration which is a certain external force.

  The cleaning state detection sensor unit is supported on both sides, one side is slidably supported with a guide wall provided on the inner wall of the hand hose, and the other side is supported by an elastic body, and the cleaning state detection sensor is opposed to the gap with a gap. An electrode and a movable contact piece which is a movable body having electrical conductivity and capable of rolling in an operation space formed by an electrode side surface portion slidable with the electrode or continuous with the electrode and the periphery of the electrode. Opposite to the direction perpendicular to the direction of movement of the hand hose during the cleaning operation of the vacuum cleaner, the operation space has a substantially cylindrical shape whose diameter direction is longer than the height direction with the electrodes as the bottom surface and the top surface, respectively. Since it comprised, the vibration of a cleaning state detection sensor can be detected with a simple structure.

Embodiment 2. FIG.
The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
FIG. 13 is a longitudinal sectional view of the hand hose 3 according to the second embodiment. In the first embodiment, the cleaning state detection substrate 58 is disposed so as to be reciprocally movable in the Z direction. However, in the second embodiment, the housing of the hand hose 3 is pivotally supported on the rotary shaft 72 via an elastic body. Is done. Therefore, the cleaning state detection substrate 58 swings around the rotation shaft 72 in the YZ plane with respect to the movement in the front-rear direction (Z direction) accompanying the cleaning operation. Since it swings in the YZ plane, it is possible to detect the movement of the cleaning state detection substrate 58 in the front-rear direction (Z direction) with high sensitivity.

  Further, the operation restricting rib 73 (regulating means) protrudes from the connecting tube 51 toward the lid portion 53 so as to restrict the swinging motion of the swingable vibration detecting substrate 58. When the electrodes 37, 38 facing each other and the movable body 40 in contact with each other in the cleaning state detection sensor unit 31 are stationary and left in a high temperature condition, an adhesion phenomenon due to interatomic bonding may occur at the contact point. Vibration may not be detected correctly when an adhesion phenomenon occurs. When the vibration detection substrate 58 swings, it collides with the operation limiting rib 73, and the adhered movable body 40 can be peeled off from the electrode by the impact of this collision. Therefore, a cleaning state detection sensor with few malfunctions can be obtained.

FIG. 14 is a diagram illustrating the configuration of the rotating shaft 72 that pivotally supports the cleaning state detection board 58.
14A, the rotating shaft 72 is fixed to the housing of the hand hose 3 and provided in the X direction. A shaft cover 72a (elastic body) having an elastic constant smaller than that of the housing of the hand hose 3 is provided around the rotating shaft 72. The outer periphery of the shaft cover 72a pivotally supports a bearing 72c provided on the cleaning state detection board 58. In this way, the cleaning state detection sensor unit is pivotally supported via the elastic body with respect to the housing of the hand hose, and the elastic constant of the elastic body is smaller than the elastic constant of the housing of the hand hose. As described in the first embodiment, vibration during interruption of the cleaning operation, which is an external force having a high frequency, is absorbed by the rotary shaft cover and is not easily transmitted to the cleaning state detection board 58 and the cleaning state detection sensor 32. As a result, it is possible to suppress detection of vibrations that are not accompanied by an operation during cleaning. It is possible to suppress detection of vibration during interruption of the cleaning operation, which is a vibration having a higher frequency than the vibration in the hand hose during the cleaning operation.

  FIG. 14B is a diagram illustrating the configuration of the rotating shaft 72 in another embodiment related to the second embodiment. The rotary shaft 72 is supported in the X direction by being supported via an elastic shaft cover 72 fixed to the housing of the hand hose 3. The elastic constant of this elastic body is smaller than the elastic constant of the housing of the hand hose 3. In this way, the cleaning state detection sensor unit is pivotally supported via the elastic body with respect to the housing of the hand hose, and the elastic constant of the elastic body is smaller than the elastic constant of the housing of the hand hose. As described in the first embodiment, vibration during interruption of the cleaning operation, which is an external force having a high frequency, is absorbed by the rotary shaft cover and is not easily transmitted to the cleaning state detection board 58 and the cleaning state detection sensor 32. As a result, it is possible to suppress detection of vibrations that are not accompanied by an operation during cleaning. It is possible to suppress detection of vibration during interruption of the cleaning operation, which is a vibration having a higher frequency than the vibration in the hand hose during the cleaning operation.

  According to the vacuum cleaner configured as described above, the cleaning state detection sensor unit is pivotally supported via the elastic body with respect to the housing of the hand hose, and the elastic constant of the elastic body is that of the housing of the hand hose. Since it is smaller than the elastic constant, it is possible to suppress detection of vibration during the cleaning operation interruption, which is vibration having a frequency higher than that of the hand hose during the cleaning operation.

  In addition, since a restricting means for restricting the movement of the cleaning state detection sensor unit based on the movement of the hand hose during the cleaning operation of the vacuum cleaner is provided, the movable body is prevented from sticking to the electrode, A small number of cleaning state detection sensors can be obtained.

  Further, the cleaning state detection sensor unit is pivotally supported by an axis parallel to the direction in which the electrodes face each other, and this swinging movement is limited by a convex portion protruding from the inner wall of the hand hose. An electrode having a gap and a movable contact piece, which is a movable body having electrical conductivity that is slidable with the electrode or rollable in an operation space formed by a side surface continuous with the electrode and the electrode periphery, Opposite the direction perpendicular to the direction of movement of the hand hose during the cleaning operation of the vacuum cleaner, the operation space is formed in a substantially cylindrical shape whose diameter direction is longer than the height direction with the electrodes as the bottom surface and the top surface, respectively. Since it comprised, the vibration of a cleaning state detection sensor can be detected with sufficient sensitivity by a simple structure.

Embodiment 3 FIG.
In the first embodiment and the second embodiment, one hand hose is provided, but in the third embodiment, as shown in FIG. 15, two cleaning state detection sensors are provided, and each cleaning state detection is performed. The electrodes (X direction) facing the sensor are arranged so as to be orthogonal to each other.

As shown in FIG. 8A, when the facing direction of the electrodes 37, 38 of the cleaning state detection sensor 32 is held in the X direction, the movable contact piece 40 of the cleaning state detection sensor 32 is in the operation space 64. It is swung in the YZ plane around the front-rear direction (Z direction). In this case, it is easy to detect vibrations in the direction in which the hand hose 3 moves, and it can be said that the cleaning posture detection sensor 32 is in a desirable posture. On the other hand, when the cleaning hose is interrupted, when the hand hose 3 is placed sideways, as shown in FIG. 8B, when the facing direction of the electrodes 37, 38 of the cleaning state detection sensor 32 is held in the Y direction, It is difficult to detect vibration in the direction in which the hand hose 3 moves.
.

  Therefore, as shown in FIG. 15A, if the two cleaning state detection sensors 32 are arranged so that the opposing directions of the electrodes 37 and 38 are orthogonal to each other, the hand hose 3 is moved upward with the lid portion 53 8A and 8B, the direction in which the electrodes 37 and 38 of one cleaning state detection sensor 32 face each other is in a posture as shown in FIG. It is easy to detect vibration in the direction in which the hand hose 3 moves.

  FIG. 15B illustrates another example related to the third embodiment. The hand hose 3 is arranged so that the electrodes 53 of the two cleaning state detection sensors 32 face each other with an inclination of 45 ° from the horizontal direction and are orthogonal to each other with the lid portion 53 in the vertical position. Set up. Even if it arrange | positions in this way, it is easy to detect the vibration with respect to the moving direction of the hand hose 3 similarly to Fig.15 (a).

  In the vacuum cleaner configured as described above, two cleaning state detection sensors are provided, and the electrodes facing each cleaning state detection sensor are arranged so that the opposing directions thereof are orthogonal to each other. It is easy to detect vibration in the direction in which the hand hose 3 moves, no matter how the axis is tilted.

  In the first embodiment, no restriction means is provided, but a configuration for restricting the reciprocating motion in the Z direction may be provided. By providing this restricting means, adhesion between the movable contact piece and the electrode can be eliminated as in the second embodiment.

  In the second embodiment, the damper means is not provided, but a damper means for suppressing the swinging motion in the YZ plane around the X axis may be provided. By providing this damper means, as in the first embodiment, the natural vibration that is not the detection target is attenuated, and the movement of the cleaning state detection sensor unit with respect to the vibration that is the external force that is the detection target can be detected efficiently.

1 suction tool, 2 extension pipe, 3 hand hose, 4 hose, 5 vacuum cleaner body,
6 wheels, 7 power cord, 8 operation switch, 9 electric blower, 10 body case,
11 Lower case, 12 Upper case, 13 Hose connection port, 14 Body pipe,
15 Dust collector connection port, 16 Exhaust hole, 17 Main body inlet, 18 Dust collector fixing hole,
19 Electric motor, 20 Dust collector, 21 Dust collector inlet, 22 Dust collector outlet,
23 dust collector fixing part, 24 commercial power supply, 25 15A fuse, 264A fuse,
27 DC 12 V power supply, 28 constant voltage power supply, 29 microcomputer (control means), 30 connecting parts, 31 cleaning state detection sensor part, 32 cleaning state detection sensor,
33 Cleaning state detection means, 34 Triac for driving the main body,
35 Triac for motor drive, 36 Safety switch, 37 electrodes,
37a electrode side surface portion, 37b electrode side surface portion, 37c electrode flat surface portion, 37d lead wire,
38 electrode, 38a electrode side surface part, 38b electrode side surface part, 38c electrode flat surface part,
38d lead wire, 39 mold, 40 movable contact piece (movable body),
41 Primary filter, 42 Secondary filter, 51 Connection pipe, 51a Hose connection part,
51b Extension pipe connection part, 52 Grip part, 53 Lid part, 54 Hose cover,
55 Lower holding rib (a part of damper means, guide wall), 55a Stepped portion lower surface,
55b Step side surface, 56 Upper holding fixture (elastic body), 57 Upper holding rib,
58 cleaning state detection board, 59 support wall (part of damper means), 64 operation space,
72 Rotating shaft, 72a Shaft cover, 72b Shaft cover, 72c Bearing,
73a Operation restriction rib (regulation means), 73b Operation restriction rib, 100 Vacuum cleaner.

Claims (8)

A vacuum cleaner body with a built-in electric blower,
A hose with one end attached to the vacuum cleaner body;
A hand hose attached to the other end of the hose;
An extension pipe attached to the hand hose and communicating with the hose;
In a vacuum cleaner having a suction tool attached to the extension pipe,
A cleaning state detection sensor unit that is provided in the hand hose and detects vibration in the hand hose;
Control means for controlling the electric blower based on the output of the cleaning state detection sensor unit,
The cleaning state detection sensor unit is supported by an elastic body with respect to the housing of the hand hose, and an elastic constant of the elastic body is smaller than an elastic constant of the housing of the hand hose. Electric vacuum cleaner.   The cleaning state detection sensor unit is pivotally supported via an elastic body with respect to a housing of the hand hose, and an elastic constant of the elastic body is smaller than an elastic constant of the housing of the hand hose. Item 2. The vacuum cleaner according to Item 1.   The cleaning state detection sensor unit includes a cleaning state detection sensor having a movable body that is displaced based on a moving direction of the hand hose during a cleaning operation of the electric vacuum cleaner. Electric vacuum cleaner.   The damper means which suppresses the movement of the cleaning state detection sensor part based on the movement of the hand hose during the cleaning operation of the electric vacuum cleaner is provided. Electric vacuum cleaner.   The regulation means which regulates the movement of the cleaning state detection sensor unit based on the movement of the hand hose during the cleaning operation of the electric vacuum cleaner is provided. Electric vacuum cleaner. The cleaning state detection sensor unit is supported on both sides, one side is slidably supported with a guide wall provided on the inner wall of the hand hose, and the other side is supported by an elastic body,
The cleaning state detection sensor
Electrodes facing each other with a gap;
A movable contact piece that is a movable body that is slidable with the electrode or can be rolled in an operation space formed by the electrode and a side surface of the electrode that is continuous with the electrode periphery, and has electrical conductivity;
The electrode is vertically and facing the direction perpendicular to the direction of movement of the hand hose during the cleaning operation of the vacuum cleaner,
5. The electric vacuum cleaner according to claim 3, wherein the operation space has a substantially cylindrical shape whose diameter direction is longer than a height direction in which the electrodes are the bottom surface and the top surface, respectively. The cleaning state detection sensor unit is pivotally supported by an axis parallel to the opposing direction of the electrodes,
The swinging motion is limited by a convex portion protruding from the inner wall of the hand hose,
The cleaning state detection sensor
Electrodes facing each other with a gap;
A movable contact piece that is a conductive movable body that is slidable with the electrode or is capable of rolling in an operating space formed by a side surface continuous with the electrode and the electrode periphery;
The electrode is vertically and facing the direction perpendicular to the direction of movement of the hand hose during the cleaning operation of the vacuum cleaner,
6. The electric vacuum cleaner according to claim 5, wherein the operation space has a substantially cylindrical shape whose diameter direction is longer than a height direction in which the electrodes are the bottom surface and the top surface, respectively.   The vacuum cleaner according to claim 6 or 7, wherein two cleaning state detection sensors are provided, and the cleaning electrodes of the cleaning state detection sensors are arranged so that opposing directions thereof are orthogonal to each other.

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