CN113693481A - Electric vacuum cleaner - Google Patents

Abstract

The electric vacuum cleaner comprises a suction device including an electric component accommodating part having a housing for accommodating an electric blower and a control substrate; an operation unit that switches between driving and stopping of the electric blower; and a discharge section. The operation unit has a switch unit and a wiring unit capable of electrically connecting the switch unit and the control board. The discharge unit is provided in the wiring unit at a position near the switch unit, and discharges static electricity into air in the housing.

Description

Electric vacuum cleaner

Technical Field

The present invention relates to an electric vacuum cleaner.

Background

In a conventional vacuum cleaner, dust on a surface to be cleaned is sucked together with air, and therefore static electricity due to friction is generated between an air passage in the vacuum cleaner and the dust or air, and the static electricity is transmitted from the vacuum cleaner to a hand of a user, which may cause discomfort.

Further, japanese patent application laid-open No. 10-55895 proposes an electric vacuum cleaner in which an electrostatic discharge body capable of discharging static electricity charged by a charging member into the air from an end of short fibers of a felt is provided on an outer surface of a suction flow path.

Disclosure of Invention

Dust (particularly, dust) is sucked in by the suction port body having the rotary brush while being scraped, thereby generating static electricity, and the static electricity is transmitted to the handle through the electric wiring system, which may give a user a sense of discomfort.

An object of an aspect of the present invention is to provide an electric vacuum cleaner completed in view of the above circumstances.

According to one aspect of the present invention, a vacuum cleaner is provided with a vacuum cleaner main body having a suction device and a dust collecting device for collecting dust sucked, the suction device having a housing with an electric blower built therein and sucking dust;

the suction device is provided with an electric component accommodating part for accommodating the electric blower and the control substrate, a pipe part for conveying air sucked by the suction force generated by the electric blower and dust on a surface to be cleaned to the dust collecting device, an operation part for switching the driving and stopping of the electric blower and a discharge part;

the operation unit has a switch unit, a cover unit provided on an outer surface of the housing so as to be operable with the switch unit, and a wiring unit electrically connecting the switch unit and the control board;

the discharge unit is provided in the vicinity of the switch unit on the outer periphery of the wiring unit, and is configured to discharge the static electricity of the wiring unit into the air in the housing.

According to one aspect of the present invention, it is possible to suppress the possibility of static electricity generated during cleaning by the electric vacuum cleaner causing uncomfortable irritation to the user's hand.

Drawings

Fig. 1 is a perspective view showing a first embodiment of an electric vacuum cleaner according to an aspect of the present invention.

Fig. 2 is a block diagram illustrating a control system of the electric vacuum cleaner according to the first embodiment.

Fig. 3 is a left side sectional view showing a cleaner main body of the electric cleaner of the first embodiment.

Fig. 4 is a block diagram illustrating a control system of the cleaner body of fig. 3.

Fig. 5 is a partial left side sectional view showing the operation portion and the grip portion of the cleaner body of fig. 3.

Fig. 6 is an explanatory view showing a discharging portion provided in a wiring portion of an operation portion of the cleaner body of fig. 3.

Fig. 7 is a cross-sectional view showing a discharge portion provided on the wiring portion of fig. 6.

Fig. 8 is a plan view showing the discharge portion before being mounted on the wiring portion of fig. 6.

Fig. 9 is a plan view showing a modification of the discharge portion of the first embodiment.

Fig. 10(a) is a plan view of the discharge portion of the second embodiment, and fig. 10(B) is a plan view of a modification thereof.

Fig. 11(a) is a plan view of the discharge portion of the third embodiment, and fig. 11(B) is a plan view of a modification of the second embodiment.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings. In addition, the following description is illustrative in all respects and should not be construed as limiting the invention.

(first embodiment)

Fig. 1 is a perspective view showing a first embodiment of an electric vacuum cleaner according to an aspect of the present invention.

As shown in fig. 1, the electric vacuum cleaner 1 is a bar-shaped cordless electric vacuum cleaner including a cleaner body 10, a battery 40 detachably attached to the cleaner body 10, an extension pipe 60 detachably connected to one end 61a of the cleaner body 10, and a suction port body 70 detachably connected to the other end 61b of the extension pipe 60. In the vacuum cleaner 1, the suction port body 70 may be connected directly to the cleaner body 10 without the extension pipe 60, and may be used as a hand-held type.

In addition, although the stick-type electric vacuum cleaner is exemplified in the present embodiment, one aspect of the present invention may be a hand-held electric vacuum cleaner such as a stick-type electric vacuum cleaner, a canister-type electric vacuum cleaner, an upright-type electric vacuum cleaner, or a vacuum cleaner, in which a dust collecting device is provided on the extension pipe side.

Fig. 2 is a block diagram illustrating a control system of the electric vacuum cleaner according to the first embodiment.

As shown in fig. 1 and 2, the electric vacuum cleaner 1 is provided with an electric wiring system including the relay wiring units 26, 62, 76, and the like, and the relay wiring units 26, 62, 76, and the like electrically connect the cleaner body 10 and the suction port body 70 via the extension pipe 60 or without via the extension pipe 60. The relay wiring units 26, 62, 76 and other wiring units will be described in detail later.

The cleaner body 10 includes a suction device 20 that incorporates an electric blower 22 and sucks dust, and a dust collecting device 30 that collects the sucked dust. In addition, the cleaner body 10 will be described in detail later.

The extension pipe 60 includes a pipe main body 61 and the relay wiring unit 62 including a plurality of conductive cables provided along the pipe main body 61.

Each of the conductive cables of the relay wiring section 62 has a pin-shaped terminal 62a provided on the side of one end 61a and a clip-shaped terminal 62b provided on the side of the other end 61 b.

The suction port body 70 includes a suction port main body 71, a joint portion 72 rotatably coupled to the suction port main body 71 about a first axis in the front-rear direction, and a connecting pipe portion 73 rotatably coupled to the joint portion 72 about a second axis orthogonal to the first axis.

The suction port body 71 includes a housing 71a having a suction port (not shown) at the bottom, a rotary brush 74 rotatably provided in the housing 71a near the suction port, a drive motor 75 for rotating the rotary brush 74, a motor drive circuit (not shown) electrically connected to the drive motor 75, the relay wiring unit 76 having a pin-shaped terminal 76a at the tip and including a plurality of conductive cables electrically connected to the motor drive circuit, and a power transmission mechanism 77 (e.g., a pulley/belt mechanism) for transmitting the rotational force of the drive motor 75 to the rotary brush 74.

In a state where the suction port body 70 is connected to the extension pipe 60, the pin-shaped terminal 76a of the relay wiring portion 76 of the suction port body 70 is inserted into the clip-shaped terminal 62b of the relay wiring portion 62 of the extension pipe 60 and electrically connected thereto.

In a state where the extension pipe 60 is connected to the cleaner body 10, the pin-shaped terminals 62a of the relay wiring unit 62 of the extension pipe 60 are inserted into the clip-shaped terminals 26a of the relay wiring unit 26 including a plurality of conductive cables described later of the cleaner body 10 and electrically connected.

In addition, in the case of using the suction port body 70 directly connected to the cleaner body 10 without the extension pipe 60, the pin-shaped terminal 76a is inserted into the clip-shaped terminal 26a and electrically connected.

< Structure of vacuum Cleaner Main body >

Fig. 3 is a left side sectional view showing a cleaner body of an electric cleaner according to a first embodiment, fig. 4 is a block diagram illustrating a control system of the cleaner body of fig. 3, and fig. 5 is a partial left side sectional view showing an operation portion and a grip portion of the cleaner body of fig. 3. In fig. 3, the front-rear vertical direction as viewed from a user who holds a pipe portion 21d of the cleaner body 10, which will be described later, horizontally is shown by an arrow, the direction orthogonal to the front-rear vertical direction (the direction perpendicular to the paper surface of fig. 3) is the left-right direction, and the structure of the cleaner body is described based on the front-rear left-right vertical direction. In fig. 4, the control system of the cleaner body 10 (the suction device 20) is shown in more detail than fig. 2, and the general positions of the components of the control system in the cleaner body 10 are also shown.

As shown in fig. 2 to 5, the suction device 20 of the cleaner body 10 includes a casing 21, and the casing 21 includes an electric component housing portion 21a housing the electric blower 22, a drive board 22a thereof, a control board 23, and the like, a handle portion 21b provided behind the electric component housing portion 21a, a battery mounting portion 21c provided at a lower end of the electric component housing portion 21a, and a tube portion 21d provided in front of an upper portion of the electric component housing portion 21 a.

Further, the suction device 20 is provided with an operation portion 21e extending from the upper end of the electric component housing portion 21a toward the grip portion 21b, and a discharge portion 21f for discharging static electricity of the operation portion 21e into the air in the case 21.

The electric component housing portion 21a of the case 21 is a substantially cylindrical portion, and is provided with a cylindrical air inlet 21aa that opens forward, and a grid member 21ab (see fig. 3) is fitted into the air inlet 21 aa.

Further, an exhaust port 21ac formed of a plurality of small holes is provided in the right side wall of the electrical component housing portion 21 a.

The electric blower 22 is disposed behind the air inlet 21aa in the electric component housing part 21a, and the rotation axis of the electric blower 22 is positioned above and parallel to a center line P passing through the center of the air inlet 21 aa.

The drive substrate 22a of the electric blower 22 is disposed behind the electric blower 22.

The control board 23 (see fig. 4) is disposed, for example, behind the drive board 22a or between the electric blower 22 and the battery mounting portion 21 c.

The control substrate 23 on which the electronic components including the microcomputer are mounted is electrically connected to the battery 40 mounted on the battery mounting portion 21c via a wiring portion 23a including a plurality of conductive cables, and is electrically connected to the drive substrate 22a via a wiring portion 23b including a plurality of conductive cables.

The grip portion 21b includes an upper end portion 21ba extending rearward from an upper portion of the electric component housing portion 21a, a lower end portion 21bb extending rearward from a lower portion of the electric component housing portion 21a, and a grip portion 21bc connecting the upper end portion 21ba and the lower end portion 21 bb. The grip portion 21bc is provided with a grip sensor 21bs, and the grip sensor 21bs is provided on the grip portion 21bc so as to detect a finger of a hand H (see fig. 5) of a user who grips the grip portion 21bc and output a detection signal to the control board (control portion) 23. A battery lock mechanism 21bd is provided below the grip portion 21 b.

The grip sensor 21bs includes a light emitting element and a light receiving element, and irradiates light L1 from the light emitting element to the finger of the hand H of the user who grips the grip portion 21bc, and the light receiving element receives reflected light L2 of the light L1 reflected by the finger, thereby detecting the finger of the hand H (see fig. 5).

The grip sensor 21bs is electrically connected to the operation section 21e through a wiring section 21ec including a plurality of conductive cables. A discharge portion 21f, which will be described later, is provided in the wiring portion 21ec in the vicinity of the connection portion with the operation portion 21 e.

A connection portion 21ae continuously connected to the upper end portion 21ba of the handle portion 21b is provided above the electric component housing portion 21a, and an operation portion 21e including a switch for switching the intensity/weakness of the electric blower 22, an automatic operation mode switch for automatically adjusting the output of the electric blower 22 and operating the electric blower, an off switch for stopping the operation, and the like is provided on the connection portion 21ae and the upper end portion 21ba of the handle portion 21 b.

The operation unit 21e is electrically connected to the control board 23 via a wiring unit 21ed including a plurality of conductive cables (see fig. 4). The operation unit 21e and the discharge unit 21f will be described in detail later.

The battery lock mechanism 21bd has a lock release button portion 21bda provided at a lower portion of the grip portion 21bc, a claw portion 21bdb having an inclined surface portion which is slidably in contact with the lock release button portion 21bda, and a biasing member 21bdc (e.g., a compression coil spring) which biases the claw portion 21bdb downward.

According to the battery lock mechanism 21bd, when the lock release button 21bda is pushed forward, the front end of the lock release button 21bda pushes the inclined surface of the claw 21bdb, and the claw 21bdb moves upward against the biasing force of the biasing member 21 bdc. When the pressing of the unlock button 21bda is released from this state, the claw portion 21bdb is pressed by the biasing member 21bdc and moves downward, whereby the unlock button 21bda moves to the rear initial position (the position shown in fig. 3).

The battery mounting portion 21c has a recess portion that opens downward and rearward, and the recess portion is provided in an inclined shape that slightly rises (for example, about 10 °) from the rear toward the front. In addition, power receiving terminals (not shown) that can be electrically connected to power supply terminals (not shown) of the battery 40 are provided in the deep portions of the concave portions of the battery mounting portion 21 c.

Also, ribs (not shown) extending in the longitudinal direction are provided on the left and right side surfaces in the recessed portion, and groove portions (not shown) provided along the left and right sides of the battery 40 are fitted into the left and right ribs of the battery mounting portion 21c while sliding. At this time, the claw portion 21bdb of the battery lock mechanism 21bd is locked to the notch recess 42 on the rear upper surface of the battery 40, whereby the battery 40 is locked to the battery mounting portion 21c in a mounted state (see fig. 3).

The pipe portion 21d is continuously provided to the coupling portion 21ae, projects forward from a projecting portion 21ad projecting forward of the air inlet 21aa, and has a suction port 21da at the tip.

As shown in fig. 3 and 4, in the tube portion 21d, clip-shaped terminals 26a of the relay wiring portion 26 are provided in a closed space below the suction port 21da, and a partition plate 21db having a plurality of insertion holes (not shown) communicating with the clip-shaped terminals 26a is provided at the tip end of the closed space.

As shown in fig. 2 and 4, the relay wiring section 26 is electrically connected to the control board 23.

When the one end 61a of the extension pipe 60 is inserted into the suction port 21da of the pipe portion 21d of the suction device 20 and connected, the plurality of pin-shaped terminals 62a of the extension pipe 60 are inserted into the plurality of insertion holes of the pipe portion 21d and electrically connected to the plurality of clip-shaped terminals 26 a.

As shown in fig. 3, the dust collecting device 30 is a cyclone type dust collecting device having a dust collecting container 31 and a filter unit 32 detachable from the dust collecting container 31, and is installed laterally along the lower end of the pipe portion 21d of the suction device 20. That is, the space between the lower end of the pipe portion 21d and the air inlet 21aa of the electric component housing portion 21a in the suction device 20 is configured as a mounting portion of the dust collecting device 30.

An inlet 31a (see fig. 3) is provided in a part of the peripheral wall of the dust collection container 31, and an outlet 21dc (see fig. 5) connectable to the inlet 31a of the dust collection container 31 is provided at the lower end of the pipe portion 21d of the suction device 20. Therefore, when the cleaner body 10 is driven, the air containing dust flowing into the pipe portion 21d of the suction device 20 flows into the dust collection container 31 through the outlet 21dc and the inlet 31 a.

The filter part 32 of the dust collecting device 30 includes a cup part 32a detachably fitted in an opening part of the dust collecting container 31, an inner cylinder part 32b connected to a center hole of the cup part 32a and housed in the dust collecting container 31, and a filter main body 32c provided on the opposite side of the inner cylinder part 32b of the cup part 32 a.

When the cleaner body 10 is driven, a part of the first relatively large dust in the air containing dust flowing into the dust collection container 31 is rotated in the dust collection container 31 and centrifugally separated, and the other first dust is captured by the mesh portion provided in the inner cylindrical portion 32 b. The relatively fine second dust having passed through the mesh portion is captured by the filter main body 32 c. The air from which dust has been removed by the filter main body 32c flows into the suction device 20 through the air inlet 21aa, and is discharged from the exhaust port 21ac by the electric blower 22.

< relating to the operation part and the discharge part >

Fig. 6 is an explanatory view showing a discharging portion provided in a wiring portion of an operation portion of the cleaner body of fig. 3. Fig. 7 is a cross-sectional view showing a discharge portion provided in the wiring portion of fig. 6, and fig. 8 is a plan view showing the discharge portion before being mounted on the wiring portion of fig. 6.

As shown in fig. 3 and 6, the operation unit 21e provided in the vicinity of the grip portion 21b includes a switch unit 21ea, a cover unit 21eb provided on the outer surface of the housing 21 so as to be able to operate the switch unit 21ea, the wiring unit 21ec electrically connecting the switch unit 21ea and the grip sensor 21bs via a board-side connector unit 21eac and a wiring-side connector unit 21ecb, which will be described later, and the wiring unit 21ed electrically connecting the switch unit 21ea and the control board 23.

The switch section 21ea includes a switch main body 21eaa, a circuit board 21eab on which the switch main body 21eaa is mounted, and a substrate-side connector section 21eac for electrically connecting the circuit board 21eab and the wiring section 21 ec.

In the present embodiment, three switch main bodies 21eaa are provided on the circuit board 21 eab. The three switch main bodies 21eaa are, for example, an automatic operation mode switch that operates while automatically adjusting the output of the electric blower 22, a switch that switches "strong/weak" of the output of the electric blower 22, and an "off switch that stops the operation of the electric blower 22.

In the present embodiment, three LED lamps 21ead are provided on the circuit board 21 eab. The three LED lamps 21ead are, for example, a lamp that is lit when the automatic operation mode is in use, a lamp that is lit when the output of the electric blower 22 is "strong", and a lamp that is lit when the output of the electric blower 22 is "weak".

The circuit board 21eab is screwed to a rib structure portion in the housing 21 so that the board-side connector portion 21eac faces the handle portion 21b side (see fig. 3).

As shown in fig. 1, 3, and 6, cover portion 21eb is formed of an oval sheet material fitted into an oval hole formed in case 21, and covers a plurality of switch main bodies 21eaa from above.

The cover 21eb has three circular flexible film portions 21eba at positions corresponding to the three switch main bodies 21eaa, and characters such as "automatic", "strong/weak", and "open" are printed on the surfaces of these portions. By pressing these flexible film portions 21eba with fingers, the switch main bodies 21eaa are pressed through the flexible film portions 21 eba.

In addition, the portions of the cover 21eb corresponding to the three LED lamps 21ead are transparent or translucent, and the light of each LED lamp 21ead can be visually recognized from the outside.

The wiring section 21ec includes a wiring main body 21eca (see fig. 7) in which the conductive cable 21ecx is covered with an insulating tube 21ecy, and a wiring-side connector section 21ecb electrically connected to the wiring main body 21eca so as to be electrically connectable to the substrate-side connector section 21 eac. In the present embodiment, the case where the wiring portion 21ec has three wiring bodies 21eca is exemplified, but the number of the wiring portions 21ec is not particularly limited, and may be 1, 2, or four or more.

As shown in fig. 6 to 8, the discharge portion 21f includes: a conductive winding portion 21fa wound around the outer periphery of the wiring main body 21eca at a position near the wiring-side connector portion 21ecb, and a pair of conductive protruding portions 21fb protruding from the winding portion 21fa toward the wiring main body 21eca on the opposite side to the wiring-side connector portion 21 ecb.

In the case of the present embodiment, in the discharging section 21f, the winding section 21fa is formed of a band-shaped conductive fiber bundle, and the protruding section 21fb is formed of a brush-shaped conductive fiber bundle. The discharge portion 21f can be formed by, for example, attaching a pair of brush-shaped protruding portions 21fb to one long side of the unwound strip-shaped winding portion 21fa with a space therebetween.

The conductive fibers used in the discharge portion 21f may be any fibers having conductivity, and examples thereof include fibers made of metal such as copper, aluminum, and stainless steel.

The discharge section 21f is attached by winding the winding section 21fa around the outer periphery of the wiring section 21ec by projecting a pair of projecting sections 21fb to the wiring section 21ec (three wiring bodies 21eca) on the opposite side of the wiring-side connector section 21 ecb.

At this time, for example, a double-sided tape (not shown) attached to a wider surface of the winding portion 21fa may be wound (attached) around the wiring portion 21 ec. Further, the fixing tape 21fc may be wound around the outer surface of the winding portion 21fa wound around the wiring portion 21ec to firmly fix the winding portion 21fa to the wiring portion 21ec, and the conductive fibers constituting the respective protruding portions 21fb may be prevented from coming off. The double-sided tape and the fixing tape 21fc may have conductivity.

When the discharge portion 21f is wound around the wiring portion 21ec, the pair of protruding portions 21fb may protrude toward the wiring portion 21ec (three wiring main bodies 21eca) on the opposite side of the wiring-side connector portion 21 ecb. That is, the pair of protruding portions 21fb may protrude along the wiring portion 21ec, or the tip side of each protruding portion 21fb may be bent in a direction away from or close to the wiring portion 21 ec.

When the discharge portion 21f is wound around the wiring portion 21ec, the distance W from the winding portion 21fa to the wiring-side connector portion 21ecb is preferably 1mm to 6mm (see fig. 6). When the distance W is 1mm or more, the possibility that the conductive fiber of the winding part 21fa enters between the wiring main body 21eca and the wiring side connector part 21ecb and comes into contact with the core wire (the conductive cable 21ecx) of the wiring main body 21eca can be suppressed, and since the distance W is 6mm or less, static electricity easily flies from the wiring side connector part 21ecb to the winding part 21fa, and a high discharge effect by the discharge part 21f is easily obtained. In other words, when the interval W is less than 1mm, the winding portion 21fa (conductive fiber) enters between the wiring main body 21eca and the wiring side connector portion 21ecb, and the possibility of coming into contact with the core wire (conductive cable 21ecx) of the wiring main body 21eca increases, and if the interval W exceeds 6mm, static electricity becomes difficult to fly from the wiring side connector portion 21ecb to the winding portion 21fa of the discharge portion 21f, and it becomes difficult to obtain a high discharge effect by the discharge portion 21 f.

In addition, when the discharge portion 21f is wound around the wiring portion 21ec, it is preferable to dispose the pair of protruding portions 21fb at positions opposing each other with the disposition portion 21ec (three wiring main bodies 21eca) as the center, in order to further enhance the discharge effect of the discharge portion 21 f.

< electric vacuum cleaner in operation >

According to the electric vacuum cleaner 1 (see fig. 1 to 6) of the first embodiment configured as described above, when the user holds the grip portion 21bc and presses the power switch (switch main body 21eaa) of the operation portion 21e, the detection signal (High or Low) from the grip sensor 21bs and the operation command signal from the power switch (switch main body 21eaa) are input to the microcomputer of the control board 23. Based on these signals, the microcomputer controls the drive motor 75 of the rotary brush 74 via a drive board (not shown) and controls the electric blower 22 via the drive board 22 a. When the "automatic" switch main body 21eaa is pressed, the automatic driving mode is set to operate while automatically switching (adjusting) the output of the electric blower 22 according to the state of the floor or the detection result of the dust sensor. Further, by pressing the "strong/weak" switch main body 21eaa, the microcomputer performs control for switching the strength each time the "strong/weak" switch main body 21eaa is pressed, so as to increase (or decrease) the output of the electric blower 22. When the user moves the hand H away from the grip portion 21bc during operation, a detection signal (low or high) is input from the grip sensor 21bs to the microcomputer, and the microcomputer controls the drive motor 75 of the rotary brush 74 via a drive board (not shown) to stop and controls the electric blower 22 via the drive board 22a to stop. When the off switch body 21eaa is pressed during operation, the microcomputer controls the drive motor 75 of the rotary brush 74 to stop via a drive board (not shown), and controls the electric blower 22 to stop via the drive board 22 a.

When the electric vacuum cleaner 1 is operated, the rotary brush 74 of the suction port body 70 rotates to scrape dust on a surface to be cleaned into the suction port and suck the dust. At this time, particularly when the dust is a dust object, static electricity is likely to be generated on the rotary brush 74, and the generated static electricity may reach the wiring-side connector portion 21ecb and the substrate-side connector portion 21eac of the operation portion 21e from the rotary brush 74 along the power transmission mechanism 77, the drive motor 75 and its motor drive circuit (not shown), the relay wiring portions 76, 62, 26, the control substrate 23, and the wiring portion 21 ec.

If the discharging portion 21f is not provided in the vicinity of the wiring-side connector portion 21ecb, static electricity accumulates in the wiring-side connector portion 21ecb and the substrate-side connector portion 21eac, and when the amount of static electricity accumulated exceeds a certain amount, the hand H of the user who grips the grip portion 21bc of the grip portion 21b flies out and an uncomfortable stimulus is applied. At this time, as shown in fig. 1 and 5, for example, it is estimated that static electricity will be discharged to the outside from a minute gap of a joint portion 21q when the outer member 21x and the inner member 21y of the case 21 constituting the handle portion 21bc are joined, or a minute gap of a peripheral edge of a mounting hole provided in the inner member 21y of the case 21 and a fitting portion 21g of the outer frame of the grip sensor 21bs fitted into the mounting hole.

In order to suppress the possibility of such static electricity causing uncomfortable stimulation to the hand H of the user due to arc discharge, in one aspect of the present invention, the discharge portion 21f is provided in the vicinity of the wiring-side connector portion 21ecb, and if the static electricity reaches the substrate-side connector portion 21eac, the static electricity periodically flies toward the winding portion 21fa of the discharge portion 21f when the amount of the charged static electricity is small, and corona discharge is performed from the ends of the conductive fibers of the brush-shaped protruding portion 21fb into the air in the housing 21. Therefore, the possibility of the user's hand H being irritated by the arc discharge as described above can be suppressed.

In the suction device 20, even when static electricity generated by friction between the air flowing from the electric blower 22 to the exhaust air passage between the exhaust ports 21a and the wiring portion 21ec is transmitted to the wiring-side connector 21ecb, the static electricity is corona-discharged from the discharge portion 21f to the air in the housing 21, as described above.

(modification of the first embodiment)

Fig. 9 is a plan view showing a modification of the discharge portion of the first embodiment. In fig. 9, the same elements as those in fig. 8 are denoted by the same reference numerals.

As shown in fig. 9, the discharge portion 121f may be provided with a brush-like projection 121fb on the entire one long side of the winding portion 21 fa.

By winding the discharge section 121f around the wiring section 21ec in this manner, the protruding section 121fb of the discharge section 121f can be arranged on the entire outer periphery of the wiring section 21ec (3 wiring bodies 21 eca). Therefore, a high discharge effect by the discharge portion 121f can be obtained.

(second embodiment and modifications thereof)

Fig. 10(a) is a plan view of the discharge portion of the second embodiment, and fig. 10(B) is a plan view of a modification thereof.

As shown in fig. 10(a), in the second embodiment, the winding portion 221fa and the pair of protruding portions 221fb of the discharge portion 221f are formed by one conductive sheet. Each of the protruding portions 221fb is a belt formed of a plurality of elongated strips 221fba cut into an elongated shape.

As shown in fig. 10(B), in the case of the modification of the second embodiment, a belt made up of a plurality of elongated strips 321fba is provided as a protruding portion 321fb on the entire one long side of the winding portion 221fa of the discharge portion 321 f.

In the case of the protruding portions 221fb, 321fb of the discharge portions 221f, 321f in the second embodiment and the modifications thereof, static electricity is discharged from the tip ends of the plurality of elongated strips 221fba, 321 fba.

In the second embodiment and the modifications thereof, static electricity flying out from the wire side connector part can be easily captured by bending the end part of the winding part 221fa on the wire side connector part side in a direction perpendicular to the wire part in a flange shape or by increasing the thickness of the winding part 221 fa. In this regard, the third embodiment and its modified examples described below are also the same.

In the second embodiment and its modified examples, the other configurations are the same as those of the first embodiment and its modified examples.

(third embodiment and modifications thereof)

Fig. 11(a) is a plan view of the discharge portion of the third embodiment, and fig. 11(B) is a plan view of a modification of the second embodiment. In fig. 11(a) and (B), the same elements as those in fig. 10(a) and (B) are denoted by the same reference numerals.

As shown in fig. 11(a), in the third embodiment, the winding portion 221fa and the pair of protruding portions 421fb of the discharge portion 421f are formed of one conductive sheet, as in the second embodiment. Each protruding portion 421fb is formed by a band having a plurality of sharp acute corners 421fb a at the tip.

As shown in fig. 11(B), in the case of the modification of the third embodiment, a band having a plurality of sharp acute-angled portions 521fb a at the tip is provided as the protruding portion 521fb on the entire one long side of the winding portion 221fa of the discharge portion 521 f.

In the case of the protruding portions 421fb, 521fb of the discharge portions 421f, 521f in the third embodiment and the modifications thereof, static electricity is corona-discharged from the sharp distal ends of the acute angle portions 421fba, 521 fba.

In the third embodiment and its modified examples, the other configurations are the same as those of the first embodiment and its modified examples.

(other embodiments)

In the suction port body 70 in the electric vacuum cleaner 1 of the above-described embodiment, the motor-driven rotary brush 74 is provided, and when static electricity is generated during rotation of the rotary brush 74 and reaches the operation portion 21e via the electric wiring system, the discharge portion 21f provided in the wiring portion 21ec electrically connected to the operation portion 21e causes the static electricity to be corona-discharged in the air in the housing 21, thereby suppressing the possibility of the static electricity flying to the hand H of the user and causing uncomfortable irritation.

That is, in the suction device 20, static electricity is generated due to friction between the air flowing from the electric blower 22 to the exhaust air passage between the exhaust ports 21ac and the wiring portion 21ec, and the static electricity may be transmitted to the wiring-side connector portion 21ecb and be accumulated. This phenomenon may occur not only when the suction port body includes a motor-driven rotary brush, but also when the suction port body includes a turbine-driven rotary brush, or when the suction port body does not include a rotary brush and a drive system therefor.

Therefore, the electric vacuum cleaner according to the aspect of the present invention can be applied to an electric vacuum cleaner in which the vacuum cleaner main body and the suction port body are not electrically connected to each other via the electric wiring system and the suction port body includes a turbo-driven rotary brush, and an electric vacuum cleaner in which the vacuum cleaner main body and the suction port body are not electrically connected to each other via the electric wiring system and the suction port body does not include a rotary brush and a drive system therefor.

In addition, one aspect of the present invention is not limited to the vacuum cleaner in which the handle portion is provided in the cleaner main body, and may be applied to, for example, a bottle-type vacuum cleaner having no handle portion.

(conclusion)

An electric vacuum cleaner of one aspect of the present invention includes a cleaner body having a suction device having a housing with an electric blower built therein and sucking dust and a dust collecting device catching the sucked dust;

the suction device is provided with an electric component accommodating part for accommodating the electric blower and the control substrate, a pipe part for conveying air sucked by the suction force generated by the electric blower and dust on a surface to be cleaned to the dust collecting device, an operation part for switching the driving and stopping of the electric blower and a discharge part;

the operation unit has a switch unit, a cover unit provided on an outer surface of the housing so as to be operable with the switch unit, and a wiring unit electrically connecting the switch unit and the control board;

the discharge unit is provided in the vicinity of the switch unit on the outer periphery of the wiring unit, and is configured to discharge the static electricity of the wiring unit into the air in the housing.

According to this configuration, static electricity generated when the electric vacuum cleaner performs cleaning reaches the switch unit via the wiring unit, and is periodically discharged (corona discharged) from the switch unit into the air in the housing via the discharge unit before the amount of static electricity in the switch unit increases, so that it becomes difficult to accumulate static electricity in the switch unit. Therefore, the possibility of uncomfortable irritation to the hand of the user near the operation unit holding the vacuum cleaner can be reduced by accumulating a large amount of static electricity (increasing the amount of charged electricity) in the switch unit and discharging (arcing) at once.

In addition, as a conventional electric vacuum cleaner, a technique is known in which the generation amount of static electricity is suppressed and the possibility of the static electricity being transmitted to the hand of the user is reduced by forming the housing with a resin containing an antistatic agent. However, in this case, the amount of static electricity charged is less than 0, and the possibility of static electricity flying out to the user's hand is not greatly changed, and in addition, the straight traveling rate of the molded product is reduced and the cost is increased.

In the vacuum cleaner disclosed in japanese unexamined patent publication No. 10-55895, the electrostatic discharge member is provided on the outer surface of the suction passage, and therefore, the electrostatic discharge member affects the design of the vacuum cleaner.

The electric vacuum cleaner of one aspect of the present invention may be configured as follows, and they may be appropriately combined.

The suction device may have a grip portion in the vicinity of the operation portion.

Since most of various electric vacuum cleaners such as a stick type, a hand-held type, a canister type, and a vertical type have a handle portion near an operation portion, the possibility of static electricity flying to the hand of a user holding the handle portion and causing discomfort can be effectively reduced according to this configuration.

The switch unit has a switch body, a circuit board on which the switch body is mounted, and a board-side connector unit for electrically connecting the circuit board and the wiring unit,

the wiring unit has a wiring main body and a wiring side connector unit electrically connected to the wiring main body so as to be electrically connectable to the substrate side connector unit,

the discharge portion may be provided at a position near the wiring-side connector portion on the outer periphery of the wiring main body.

According to this configuration, static electricity that reaches the wiring-side connector portion and the substrate-side connector portion along the wiring main body flies toward the discharge portion, and corona discharge is performed from the discharge portion into the air in the case.

The discharge portion may have a conductive winding portion wound around the outer periphery of the wiring main body in a position near the wiring-side connector portion, and a conductive protruding portion protruding from the winding portion toward the wiring main body side opposite to the wiring-side connector portion.

According to this configuration, static electricity that reaches the wiring-side connector portion and the substrate-side connector portion along the wiring main body is easily transferred to the large-area winding portion of the discharge portion, and the static electricity transferred to the winding portion is easily corona-discharged from the protruding portion into the air in the housing.

The protruding portion may be formed of a brush-like conductive fiber bundle.

With this configuration, static electricity in the discharge portion is corona-discharged from the tip of each fiber of the brush-shaped conductive fiber bundle as the protruding portion into the air in the housing.

The winding part may be formed of a band-shaped conductive fiber bundle.

According to this configuration, the rolled portion and the protruding portion can be easily formed integrally by the same conductive fiber.

The winding portion and the protruding portion are formed of a single conductive sheet,

the projections may also be formed by a belt composed of a plurality of elongated strips or a strip having a sharp corner at the leading end.

According to this configuration, the discharge portion can be formed at low cost. Further, the static electricity of the discharge portion is corona-discharged from the leading end of each elongated belt as the protruding portion or the acute angle portion of the leading end of the belt as the protruding portion into the air inside the case.

The distance from the winding portion to the wiring-side connector portion may be 1mm to 6 mm.

According to this configuration, since the interval is 1mm or more, the possibility that the rolled portion enters between the wiring main body and the wiring-side connector portion and comes into contact with the core wire (lead wire) of the wiring main body can be suppressed, and since the interval is 6mm or less, static electricity easily migrates (is easily attracted) from the wiring-side connector portion to the rolled portion of the discharge portion, and a high discharge effect by the discharge portion is easily obtained. In other words, if the interval is less than 1mm, the possibility that the rolled portion enters between the wiring main body and the wiring side connector portion and comes into contact with the core wire (lead wire) of the wiring main body increases, and if the interval exceeds 6mm, static electricity becomes difficult to transfer from the wiring side connector portion to the rolled portion of the discharge portion, so that it becomes difficult to obtain a high discharge effect by the discharge portion.

The plurality of protruding portions may protrude from the winding portion toward the wiring main body side in a state of being spaced apart from each other.

According to this configuration, since the protruding portions of the discharge portion can be arranged at a plurality of positions on the outer periphery of the wiring main body, the discharge effect of the discharge portion can be further improved, and this configuration is effective when the wiring main body of the wiring portion is formed in a plurality of bundles.

The pair of projections as the plurality of projections may be arranged at positions facing each other around the wiring main body.

According to this configuration, the pair of protruding portions of the discharge portion can be disposed at opposing positions on the outer periphery of the wiring main body, and therefore the discharge effect of the discharge portion can be further improved, which is effective when the wiring main body of the wiring portion is a plurality of beams (for example, 2 to 3 beams).

The protruding portion may be provided on the entire outer periphery of the wiring main body.

According to this configuration, since the protruding portion of the discharge portion can be disposed on the entire outer periphery of the wiring main body, a high discharge effect by the discharge portion can be obtained, which is effective when the wiring main body of the wiring portion is a plurality of beams.

Further comprises a suction port body connected with the pipe part of the dust collector main body directly or via an extension pipe,

the suction port body has a rotary brush and a drive motor that rotates the rotary brush,

an electric wiring system including the wiring unit may be provided from the switch unit of the cleaner body to the drive motor of the suction port body connected to the cleaner body directly or via an extension pipe.

According to this configuration, the suction port body having the rotary brush sucks dust (particularly, dust) while scraping it, thereby generating static electricity, and the static electricity is transmitted to the switch unit via the harness system.

A preferred embodiment of the present invention further includes an embodiment in which any one of the above-described embodiments is combined.

The present invention may have various modifications in addition to the above embodiments. Such variations are not to be construed as falling within the scope of the present invention. The invention is intended to include all modifications within the scope and meaning equivalent to the terms of the claims.

Claims (12)

1. An electric dust collector is characterized in that,

the vacuum cleaner comprises a cleaner body having a suction device and a dust collecting device for collecting dust sucked by the suction device, wherein the suction device has a housing with an electric blower therein and sucks dust;

the suction device is provided with an electric component accommodating part for accommodating the electric blower and the control substrate, a pipe part for conveying air sucked by the suction force generated by the electric blower and dust on a surface to be cleaned to the dust collecting device, an operation part for switching the driving and stopping of the electric blower and a discharge part;

the operation unit has a switch unit, a cover unit provided on an outer surface of the housing so as to be operable with the switch unit, and a wiring unit electrically connecting the switch unit and the control board;

the discharge unit is provided in the vicinity of the switch unit on the outer periphery of the wiring unit, and is configured to discharge the static electricity of the wiring unit into the air in the housing.

2. The electric vacuum cleaner as claimed in claim 1, wherein the suction device has a grip portion in the vicinity of the operation portion.

3. The electric vacuum cleaner according to claim 1 or 2,

the switch unit has a switch body, a circuit board on which the switch body is mounted, and a board-side connector unit for electrically connecting the circuit board and the wiring unit,

the wiring unit has a wiring main body and a wiring side connector unit electrically connected to the wiring main body so as to be electrically connectable to the substrate side connector unit,

the discharge portion is provided at a position near the wiring-side connector portion on the outer periphery of the wiring main body.

4. The vacuum cleaner according to claim 3, wherein the discharging portion has a conductive winding portion wound around the outer periphery of the wiring main body at a position near the wiring-side connector portion, and a conductive protruding portion protruding from the winding portion toward the wiring main body side opposite to the wiring-side connector portion.

5. The electric vacuum cleaner of claim 4, wherein the protrusion is formed of a brush-like bundle of conductive fibers.

6. The vacuum cleaner according to claim 4 or 5, wherein the rolled portion is formed of a ribbon-shaped conductive fiber bundle.

7. The electric vacuum cleaner of claim 4,

the rolled portion and the protruding portion are formed of a single conductive sheet, and the protruding portion is formed by a belt made of a plurality of elongated strips or a strip having a sharp acute angle at the tip.

8. The vacuum cleaner according to any one of claims 4 to 7, wherein an interval from the winding portion to the wiring-side connector portion is 1mm to 6 mm.

9. The vacuum cleaner according to any one of claims 4 to 8, wherein the plurality of protruding portions protrude from the rolled portion toward the wiring main body side in a state of being separated from each other.

10. The vacuum cleaner according to any one of claims 4 to 9, wherein a pair of the projections as the plurality of projections are arranged at positions facing each other with the wiring main body as a center.

11. The electric vacuum cleaner according to any one of claims 4 to 8, wherein the protruding portion is provided over an entire outer periphery of the wiring main body.

12. The electric vacuum cleaner according to any one of claims 1 to 11, further comprising a suction port body connected to the pipe portion of the cleaner body directly or via an extension pipe,

the suction port body has a rotary brush and a drive motor that rotates the rotary brush,

an electric wiring system including the wiring unit is provided from the switch unit of the cleaner body to the drive motor of the suction port body connected to the cleaner body directly or via an extension pipe.

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