JP7461729B2 - Vacuum cleaner - Google Patents

Description

The present invention relates to a vacuum cleaner.

As a conventional electric vacuum cleaner, Patent Document 1 proposes a stick-type cordless electric vacuum cleaner that includes a vacuum cleaner body having a drive unit and a dust collecting device that is detachably attached to the drive unit, and in which a suction mouth body is connected to the vacuum cleaner body via an extension tube.
The drive mechanism of the vacuum cleaner body is provided with a mounting part for holding the dust collecting device horizontally on the top surface of the electric blower storage part. The mounting part has a concave fulcrum part provided on the top surface of the electric blower storage part and a pair of guide parts provided on the front surface of the handle connection part.
The dust collecting device has a protruding engaging portion and a locking mechanism.

In this vacuum cleaner, when the dust collecting device is attached to the mounting part of the drive unit, the locking part of the dust collecting device is inserted into the fulcrum part of the mounting part to position it, and the dust collecting device is rotated toward the mounting part using the locking part as a fulcrum, whereby a pair of retaining locking parts of the locking mechanism engage with a pair of guide parts, completing the installation.
Furthermore, when removing the dust collecting device from the mounting part, the palm of the hand is placed on the dust collecting device while the pair of operating parts of the locking mechanism are grasped with the fingers and pressed in a direction toward each other, whereby the pair of retaining and engaging parts are disengaged from the pair of guiding parts. In this state, the dust collecting device can be removed from the mounting part by lifting it up using the engaging parts as a fulcrum.

Japanese Patent No. 6466176

In the conventional vacuum cleaners, when attaching the dust collector to the mounting part of the drive unit, it is necessary to insert the locking part of the dust collector into the fulcrum part of the mounting part to position it, but the fulcrum part, which serves as the target for attachment, is small and difficult for the user to identify, making the attachment operation difficult.

The present invention aims to provide a vacuum cleaner that takes these circumstances into consideration.

According to the present invention, a dust collector is provided that includes a drive unit having a housing that houses an electric blower for sucking dust, a dust collector that is detachably attached to the housing so as to collect the sucked dust and communicates with the electric blower, and a locking mechanism that releasably locks the attachment state of the dust collector to the housing,
the locking mechanism includes a first engaging portion provided on an outer surface of the housing, and a second engaging portion provided on an outer surface of the dust collecting device so as to be engageable with and disengageable from the first engaging portion,
The housing has two sides,
There is provided a vacuum cleaner in which, in a state in which the dust collecting device is attached to the housing, the locking mechanism is disposed on one of the two side surfaces of the housing.

The vacuum cleaner of the present invention improves usability when removing the dust collection device from the drive unit.

1 is a perspective view showing a first embodiment of a vacuum cleaner according to the present invention; FIG. 2 is a right side view showing the cleaner body of the first embodiment. FIG. 2 is a front view showing the vacuum cleaner body of the first embodiment. FIG. 2 is a central vertical cross-sectional view of the vacuum cleaner body of the first embodiment as viewed from the left side. FIG. 2 is a bottom view showing the drive device of the first embodiment. FIG. 2 is a front view showing the drive device of the first embodiment. 4A to 4C are diagrams illustrating the structure of a first engagement portion on the driving device side and a second engagement portion on the dust collecting device side in the vacuum cleaner of the first embodiment. 4A to 4C are diagrams illustrating the structure of an outlet on the driving device side and an inlet on the dust collecting device side in the vacuum cleaner of the first embodiment. 5A to 5C are diagrams illustrating a state in which the dust collecting device is removed from the driving device in the vacuum cleaner of the first embodiment with a right hand. 5A to 5C are diagrams illustrating a state in which the dust collecting device is removed from the driving device in the vacuum cleaner of the first embodiment with the left hand. FIG. 11 is another view illustrating a state in which the dust collecting device is removed from the driving device in the vacuum cleaner of the first embodiment with a right hand. FIG. 11 is another view illustrating a state in which the dust collecting device is removed from the driving device by a left hand in the vacuum cleaner of the first embodiment.

First Embodiment
<Overall configuration of the vacuum cleaner>
FIG. 1 is a perspective view showing a first embodiment of a vacuum cleaner according to the present invention.
As shown in FIG. 1, this vacuum cleaner 1 is a stick-type cordless vacuum cleaner 1 comprising a vacuum cleaner main body 10, a battery 40 that is detachably attached to the vacuum cleaner main body 10, an extension tube 60 having one end 61a that is detachably connected to the vacuum cleaner main body 10, and a suction port body 70 that is detachably connected to the other end 61b of the extension tube 60.

Moreover, the electric vacuum cleaner 1 described in FIG. 1 can also be used as a handheld type by connecting the suction mouth body 70 directly to the vacuum cleaner body 10 without using the extension tube 60.
Alternatively, a handy nozzle (not shown) can be attached to the vacuum cleaner body 10 to use it as a handy type vacuum cleaner.

The vacuum cleaner main body 10 includes a drive device 20 and a dust collecting device 30 that is detachably attached to the drive device 20. The vacuum cleaner main body 10 will be described in detail later.
The battery 40 includes a plurality of cells housed in a case.
The extension pipe 60 includes a pipe body 61 and a plurality of conductive cables (not shown) provided along the pipe body 61 .

The suction port body 70 comprises a suction port main body 71, a joint portion 72 connected to the suction port main body 71 so as to be rotatable around a first axis in the front-to-rear direction, and a connecting pipe portion 73 connected to the joint portion 72 so as to be rotatable around a second axis perpendicular to the first axis.
The suction port body 71 includes a housing 71a having an suction port (not shown) at the bottom, a rotating brush (not shown) rotatably arranged near the suction port in the housing 71a, and a rotating brush motor (not shown) for rotating the rotating brush.

In the electric vacuum cleaner 1, in which the vacuum cleaner body 10 and the suction mouth body 70 are connected via the extension tube 60, an electrical wiring system is provided that supplies power from the battery 40 to the rotating brush motor, and the rotational drive of the rotating brush is controlled by switching the power switch of the vacuum cleaner body 10, which will be described later, ON or OFF. The same applies when the suction mouth body 70 is directly connected to the vacuum cleaner body 10.

<Configuration of the drive device of the vacuum cleaner body>
Fig. 2 is a right side view showing the vacuum cleaner body of the first embodiment, Fig. 3 is a front view showing the vacuum cleaner body of the first embodiment, and Fig. 4 is a central vertical cross-sectional view of the vacuum cleaner body of the first embodiment as viewed from the left side. Fig. 5 is a bottom view showing the drive unit of the first embodiment, and Fig. 6 is a front view showing the drive unit of the first embodiment. In Figs. 2 to 6, arrows indicate front-rear, left-right, up-down and up-down directions as viewed from a user holding the handle 21b and holding the vacuum cleaner body 10 (a pipe section 21d described later) horizontally, and the structure of the vacuum cleaner body 10 will be described based on these front-rear, left-right, up-down directions.

As shown in Figures 2 to 8, the drive device 20 of the vacuum cleaner body 10 has a housing 21 including an electric blower storage section 21a that stores the electric blower 22 and a circuit board 23 that constitutes the control section, a handle section 21b provided at the rear of the electric blower storage section 21a, a battery attachment section 21c provided at the lower end of the electric blower storage section 21a, and a pipe section 21d provided in front of the upper part of the electric blower storage section 21a.

The electric blower housing section 21a of the housing 21 is a substantially cylindrical portion having a right side surface 21ar and a left side surface 21al (see FIGS. 3, 6, 9, 11 and 12).
The electric blower housing 21a is provided with a cylindrical air inlet 21aa that opens forward, and a lattice member 21ab is fitted into the air inlet 21aa (see Figs. 4 and 6). A packing 21ac is provided around the front surface of the lattice member 21ab inside the air inlet 21aa (see Fig. 6).
A locking protrusion 41 is provided in the right side surface 21ar of the electric blower housing 21a near the air inlet 21aa as a first locking portion of a first locking mechanism M1 (see FIGS. 2, 3, 5, and 6). The first locking mechanism M1 will be described in detail later.
An exhaust port 21ac consisting of a plurality of small holes is provided at a position rearward of the first engagement portion 41 on the right side wall of the electric blower housing portion 21a (see Figs. 2 and 4).

The electric blower 22 is positioned behind the air inlet 21aa in the electric blower storage section 21a so that the rotational axis (not shown) of the electric blower 22 is parallel to and above the center line P passing through the center of the air inlet 21aa (see Figure 4).
The circuit board 23 is disposed behind the electric blower 22. The circuit board 23 may be disposed at a position other than the position shown in FIG.

The handle portion 21b consists of an upper end portion 21ba extending rearward from the upper portion of the electric blower storage portion 21a, a lower end portion 21bb extending rearward from the lower portion of the electric blower storage portion 21a, and a grip portion 21bc connecting the upper end portion 21ba and the lower end portion 21bb.
The lower end 21bb protrudes further rearward than the upper end 21ba, and therefore the grip portion 21bc connecting them is inclined forward from the lower end 21bc side toward the upper end 21ba side.

The grip portion 21bc is provided with a grip sensor 21bs that detects the fingers of the user's hand gripping the grip portion 21bc and outputs a detection signal to the control unit.
The grip sensor 21bs includes an integrated light-emitting element and a light-receiving element (not shown). The grip sensor 21bs is configured such that the light-emitting element emits light toward the fingers of the user's hand gripping the grip portion 21bc, and the light-receiving element receives the light from the light-emitting element reflected by the fingers, thereby outputting a detection signal.
The control unit is configured to control the driving of the electric blower 22 and the rotary brush motor based on a detection signal from the grip sensor 21bs.

A battery lock mechanism 21bd is provided at the bottom of the handle portion 21b.
A connecting portion 21ae (see Figure 2) that is continuously connected to the upper end portion 21ba of the handle portion 21b is provided at the top of the electric blower storage portion 21a, and an operating portion 21e including a power switch is provided on the upper surface of this connecting portion 21ae and the upper surface of the upper end portion 21ba of the handle portion 21b.

The battery locking mechanism 21bd has an unlock button 21bda provided at the bottom of the grip 21bc, a claw 21bdb having an inclined surface that can slide against the unlock button 21bda, and a biasing member 21bdc (e.g., a compression coil spring) that biases the claw 21bdb downward.

According to this battery lock mechanism 21bd, when the unlock button 21bda is pressed forward, the front end of the unlock button 21bda presses the inclined surface of the claw 21bdb, which moves the claw 21bdb upward against the biasing force of the biasing member 21bdc. When the pressure on the unlock button 21bda is released from this state, the biasing member 21bdc presses the claw 21bdb and moves it downward, which moves the unlock button 21bda to its initial rear position (the position shown in FIG. 4).

The battery mounting section 21c has a recess that opens downward and rearward, and the recess is inclined upward slightly (for example, about 10°) from the rear to the front. In addition, a power receiving terminal (not shown) that can be electrically connected to a power supply terminal (not shown) of the battery 40 is provided at the back of the recess of the battery mounting section 21c.
Furthermore, ribs (not shown) extending along the front-rear longitudinal direction are provided on the left and right side surfaces of the recess, and when the battery is attached, grooves 41 (see FIGS. 1 and 2) provided along the left and right sides of the battery 40 slide and fit into the left and right ribs of the battery attachment section 21c. At this time, the claws 21bdb of the battery locking mechanism 21bd engage with the notched recesses 42 on the rear upper surface of the battery 40, thereby locking the battery 40 in the attached state in the battery attachment section 21c (see FIG. 4).

As shown in Figures 2 and 4, the pipe section 21d protrudes forward from a protruding section 21ad that is provided at the top of the electric blower storage section 21a and protrudes forward from the air inlet 21aa, and has a suction port 21da at its tip. In addition, the pipe section 21d and the upper end section 21ba of the handle section 21b are arranged in a straight line when viewed from the left and right direction.

Fig. 7 is a diagram for explaining the structure of a first engagement portion on the drive unit side and a second engagement portion on the dust collecting device side in the vacuum cleaner of the first embodiment, and Fig. 8 is a diagram for explaining the structure of an outlet on the drive unit side and an inlet on the dust collecting device side in the vacuum cleaner of the first embodiment.
4, 5, 7 and 8, an outlet 21dc communicating with the suction port 21da is provided on the lower surface of the pipe portion 21d, and an engagement recess 51 serving as a first engagement portion of an engagement mechanism M2 (described later) is provided in front of the outlet 21dc. The engagement mechanism M2 will be described in detail later.

As shown in Figs. 1 to 6, the housing 21 has a hook 21f in front of the battery mounting section 21c at the lower end of the electric blower storage section 21a. For example, when cleaning is interrupted, the hook 21f can be hooked onto a table to hold the stick-type vacuum cleaner 1 (see Fig. 1). The hook 21f can also be hooked onto a hook on a wall to store the vacuum cleaner 1. When the vacuum cleaner 10 (see Figs. 2 and 3) is placed on a floor when used as a handheld type, the hook 21f and the protrusions 43 on the underside of the battery 40 serve as legs to hold the vacuum cleaner 10 upright on the floor. The protrusions 43 of the battery 40 also function as a non-slip device to prevent fingers from slipping when the battery 40 is removed from the vacuum cleaner body 10.

In the housing 21 of the drive unit 20, the space below the pipe portion 21d and the space in front of the electric blower housing portion 21a form a dust collector mounting portion 21g (see FIG. 2) to which the dust collector 30 is detachably mounted.
The dust-collector mounting portion 21g of the drive device 20 and the dust-collector 30 are provided with the first locking mechanism M1 (see FIG. 2) for releasably locking the mounted state of the dust-collector 30 to the dust-collector mounting portion 21g, and the engagement mechanism M2 (see FIG. 4) for stably mounting the dust-collector 30 to the dust-collector mounting portion 21g. The dust-collector mounting portion 21g including the first locking mechanism M1 and the engagement mechanism M2 will be described in detail later.

<Configuration of the dust collecting device of the vacuum cleaner body>
2 to 4, the dust collector 30 is a cyclone type dust collector having a bottomed cylindrical dust container 31 and a removable filter unit 32. The dust collector 30 is generally cylindrical in shape and is mounted sideways on the dust collector mounting unit 21g of the drive unit 20. At this time, the axis of the generally cylindrical shape of the dust collector substantially coincides with the center line P of the air inlet 21aa of the drive unit 20.

The dust collection container 31 is formed in a cylindrical shape with a bottom, and has a bottom 31a, a peripheral wall 31b, and an opening on the opposite side to the bottom 31a.
Also, an inlet 31ba (see FIG. 8) is provided in a part of the peripheral wall 31b of the dust container 31, while an outlet 21dc (see FIGS. 5 and 8) connectable to the inlet 31ba of the dust container 31 is provided on the lower surface side of the pipe 21d of the drive unit 20. Thus, when the vacuum cleaner body 10 is driven, dust-containing air that has flowed into the pipe 21d of the drive unit 20 flows into the dust container 31 via the outlet 21dc and the inlet 31ba. The outlet 21dc and the inlet 31ba will be described in detail later.

The filter section 32 of the dust collection device 30 has a cup section 32a that is removably fitted into the opening of the dust collection container 31, an inner tube section 32b that is connected to the center hole of the cup section 32a and stored in the dust collection container 31, and a filter body 32c that is provided on the opposite side of the cup section 32a to the inner tube section 32b. The filter body 32c side of the cup section 32a serves as an exhaust port for discharging air from which dust has been removed.

When the vacuum cleaner body 10 is in operation, of the dust-containing air that flows into the dust collection container 31, some of the relatively large first dust particles rotate inside the dust collection container 31 and are centrifuged, while the other first dust particles are captured by the mesh section provided in the inner tube section 32b. The relatively fine second dust particles that pass through the mesh section are captured by the filter body 32c. The air from which dust has been removed by passing through the filter body 32c flows into the drive unit 20 from the air inlet 21aa, passes through the electric blower 22, and is exhausted from the exhaust port 21ac.

2, 7, and 8, the dust collecting device 30 includes a second locking mechanism M3 that releasably locks the connection between the opening of the dust collecting container 31 and the filter unit 32. Other configurations of the dust collecting device 30, including the second locking mechanism M3, will be described in detail later.

<Dust collector mounting part of the drive unit>
2 to 8, the dust collector mounting part 21g of the drive unit 20 (housing 21) has a first contact part that contacts one end in the length direction of the dust collector 30 mounted on the dust collector mounting part 21g, and a second contact part that contacts the outer circumferential surface of the dust collector 30 mounted on the dust collector mounting part 21g. More specifically, the dust collector mounting part 21g has the electric blower housing part 21a (the peripheral part of the air inlet 21aa) as the first contact part that contacts the filter part 32 of the dust collector 30 mounted on the dust collector mounting part 21g, and a pipe part 21d (lower side) as the second contact part that contacts the outer circumferential surface of the dust collection container 31 of the dust collector 30 mounted on the dust collector mounting part 21g.

In the dust collection device mounting portion 21g, a locking protrusion 41 serving as the first locking portion of the first locking mechanism M1 is provided on the right side surface 21ar near the air inlet 21aa of the electric blower storage portion 21a (first abutment portion) (see Figures 2, 5, and 6).
In addition, the outlet 21dc provided on the lower side of the pipe 21d of the dust-collector mounting part 21g is disposed at a position shifted to the right of the center in the left-right direction of the pipe 21d when viewed from below as shown in Fig. 5, and a packing 21dd is provided on the peripheral edge. In addition, as shown in Fig. 4 and Fig. 8, the connection surface of the outlet 21dc of the drive unit 20 with the inlet 31ba of the dust-collector 30 (specifically, the connection surface with the packing dd) is inclined toward the dust-collector 30 when mounted on the dust-collector mounting part 21g as it moves in the mounting direction (rearward).

In addition, the engagement recess 51 of the engagement mechanism provided on the lower side of the pipe portion 21d of the dust collection device mounting portion 21g is a recess that has a left-right width that is wider at the front side and narrower at the rear side when viewed from below as shown in Figure 5, and that opens downward.
The pipe portion 21d has a plate-like thick portion 51a (see FIGS. 5 and 7) that constitutes the engagement recess 51 and is sandwiched between an outer surface of the dust collecting device 30 (the outer peripheral surface of the dust collecting container 31) and the engagement protrusion 52 when the engagement protrusion 52 (see FIGS. 4, 7, and 8) serving as a second engagement portion of the dust collecting device 30 described later is inserted into the engagement recess 51. The thick portion 51a is provided with a cut portion 51b that extends in the mounting direction (rearward) to form the narrow portion of the engagement recess 51.

Further, below the pipe portion 21d of the dust-collection device mounting portion 21g, at a position rearward of the outlet 21dc, there is provided a storage recess 21de capable of storing a second locking mechanism M3 of the dust-collection device 30 mounted on the dust-collection device mounting portion 21g.
Further, an abutment protrusion 21df is provided on the lower side of the pipe portion 21d, forward of the engagement recess 51. This abutment protrusion 21df is capable of abutting against a recess 31c (described later) of the dust collecting device 30 when the dust collecting device 30 mounted on the dust collecting device mounting portion 21g is slid in the reverse direction (forward).

<Other configurations of the dust collecting device>
2 and 8, a lock body 42 is provided on the outer surface of the filter unit 32 of the dust collecting device 30 as a second locking part that can be engaged with and disengaged from a locking protrusion (first locking part) 41 of the first locking mechanism M1 of the drive device 20. In this case, the lock body 42 is arranged to be disposed on the right side of the drive device 20 (housing 21) when the dust collecting device 30 is attached to the drive device 20 (see FIG. 3). This will be described in detail later.

As shown in Figures 2 and 8, the lock main body 42 has a clamp button 42a pivotally mounted to the outer peripheral surface of the cup portion 32a of the filter portion 32 so as to be capable of swinging, a locking claw 42b provided on the clamp button 42a, and a biasing member 42c that biases the clamp button 42a.
The clamp button 42a is provided so as to be able to swing about an axis C1 that is tangential to the outer circumferential surface of the cylindrical cup portion 32a. The end of the clamp button 42a on the opposite side of the axis C1 from the dust collection container 31 protrudes outward beyond the end of the cup portion 32a, and a locking claw 42b is provided on this protruding portion so as to protrude toward the cup portion 32a (inward).
In this embodiment, the biasing member 42c is a compression coil spring, and is provided between the end of the clamp button 42a closer to the dust container 31 than the axis C1 and the cup portion 32a.

According to the first lock mechanism M1 configured in this way, the dust collector 30 is slid along the dust collector mounting portion 21g of the drive unit 20 in the mounting direction (rearward) toward the electric blower storage unit 21a (first contact portion side) to bring the filter portion 32 on one end of the dust collector 30 into contact with the periphery of the air inlet 21aa of the electric blower storage unit 21a, whereby the locking claw 42b of the lock body portion 42, which is the second locking portion, is locked to the locking protrusion 41, which is the first locking portion. This allows the dust collector 30 to be mounted on the drive unit 20. At this time, the biasing member 42c of the lock body portion 42 biases the clamp button 42a in the direction in which the locking claw 42b is locked to the locking protrusion 41. The removal of the dust collector 30 from the drive unit 20 will be described later.

As shown in FIGS. 4, 7 and 8, the second locking mechanism M3 of the dust collecting device 30 is configured similarly to the first locking mechanism M1.
That is, the second locking mechanism M3 has a clamp button 43a pivotally mounted to the outer peripheral surface of the cup portion 32a of the filter portion 32 so as to be capable of swinging, a locking claw 43b provided on the clamp button 43a, and a biasing member 43c that biases the clamp button 43a.
The second locking mechanism M3 is provided at a position shifted by a central angle of approximately 90° in the circumferential direction on the outer circumferential surface of the cup portion 32a with respect to the lock main body portion 42 of the first locking mechanism portion M1, and at a position facing the engaging protrusion 52. In other words, the second locking mechanism M3 and the engaging protrusion 52 are provided so as to be located on the same side.

The clamp button 43a is provided so as to be able to swing about an axis C2 that is tangential to the outer circumferential surface of the cylindrical cup portion 32a. A locking claw 43b is provided at an end of the clamp button 43a closer to the dust container 31 than the axis C2 so as to protrude toward the dust container 31.
In this embodiment, the biasing member 43c is a compression coil spring, and is provided between the end of the clamp button 43a on the opposite side to the dust container 31 with respect to the axis C2 and the cup portion 32a.

The second locking mechanism M3 protrudes from the open end of the substantially cylindrical dust container 31 in the axial direction and has a bent (L-shaped) locking protrusion 43d whose tip is bent away from the axis. The open end edge of the cup portion 32a that joins with the dust container 31 has a notch 32aa (see FIG. 8) into which the bent locking protrusion 43d of the dust container 31 fits, and the filter portion 32 is positioned relative to the dust container 31 by this notch 32aa.

In the second locking mechanism M3, the biasing member 43c biases the clamp button 43a in a direction in which the locking claw 43b locks into the locking protrusion 43d, thereby maintaining the connection between the dust collection container 31 and the filter section 32. By pressing the clamp button 43a, the clamp button 43a swings around the axis C2, causing the locking claw 43b to disengage from the locking protrusion 43d, allowing the dust collection container 31 and the filter section 32 to be separated and washed with water.

As shown in Figures 4 and 8, the inlet 31ba provided in the dust collection container 31 is positioned toward the first locking mechanism M1 with respect to the opposing second locking mechanism M3 and engaging protrusion 52, and is provided so as to open in a tangential direction to the outer peripheral surface of the dust collection container 31.
In addition, the connection surface between the inlet 31ba of the dust collecting device 30 mounted on the dust collecting device mounting portion 21g of the drive unit 20 and the outlet 21dc (gasket 21dd) is inclined toward the pipe portion 21d (second abutment portion) as it moves in the opposite direction (forward) to the mounting direction.

As shown in Figures 4, 7 and 8, the engagement protrusion 52 of the engagement mechanism M2 provided on the dust collection container 31 is formed in a hook shape protruding toward the second locking mechanism M3 (forward, which is the installation direction) so that it can be inserted into the engagement recess 51 of the engagement mechanism M2 provided on the pipe portion 21d of the drive unit 20.
When the dust collecting device 30 is attached to the drive device 20, the engaging protrusion 52 is inserted into the wide portion of the engaging recess 51, and by sliding the dust collecting device 30 in the attachment direction (rearward) relative to the drive device 20, the engaging protrusion 52 slides toward and engages with the thick portion 51a of the engaging recess 51. The engaging protrusion 52 is also provided with an insertion rib 52a that is inserted into the notch 51b of the engaging recess 52 when the dust collecting device 30 is slid in the attachment direction.

As shown in Figures 4 and 7, the dust collection container 31 has a recess 31c between the outer circumferential surface of the peripheral wall 31b and the bottom 31a, near the engaging protrusion 52. This recess 31c is formed by recessing the rounded corner between the peripheral wall 31b and the bottom 31a inward. The inside of the recess 31c is a protrusion 31d that prevents dust from rotating inside the dust collection container 31.

<Attaching and detaching the dust collector to the drive unit>
As shown in Figures 7 and 8, when the dust collecting device 30 is mounted on the dust collecting device mounting portion 21g of the drive device 20, first, the outer circumferential surface of the dust collecting device 30 is abutted against the pipe portion 21d (second abutment portion) of the dust collecting device mounting portion 21g.
At this time, the second lock mechanism M3 and the engaging protrusion 52 of the dust collecting device 30 are directed toward the pipe portion 21d, so that the user can recognize that the device is properly attached. At this time, the recess 31c of the dust collecting device 30 is positioned on the abutting protrusion 21df of the drive unit 20, so that the engaging protrusion 52 of the engaging mechanism M2 on the dust collecting device 30 side is inserted into the wide portion of the engaging recess 51 of the engaging mechanism M2 on the drive unit 20 side. This also forms an appropriate gap before sliding between the filter portion 32 of the dust collecting device 30 and the air inlet 21aa (first abutting portion) of the electric blower housing portion 21a of the drive unit 20.

Next, the dust collecting device 30 is slid relative to the drive device 20 in the mounting direction of the electric blower storage section 21a side. At this time, the locking claw 42b of the first locking mechanism M1 on the dust collecting device 30 side is locked to the locking protrusion 41 of the first locking mechanism M1 on the drive device 20 side. In addition, the engagement protrusion 52 on the dust collecting device 30 side is in contact with the thick portion 51a of the engagement recess 51 on the drive device 20 side, that is, the thick portion 51a of the engagement recess 51 is slid and sandwiched between the engagement protrusion 52 and the outer peripheral surface of the dust collecting container 31, and the engagement protrusion 52 and the engagement recess 51 are engaged. This completes the mounting of the dust collecting device 30 to the drive device 20. In addition, by providing the thick portion 51a, rattling in the direction in which the dust collecting device 30 approaches and separates from the drive device 20 (up and down direction) is reduced.

When the dust collecting device 30 is attached, the second locking mechanism M3 of the dust collecting device 30 is stored in a storage recess 21de provided at the lower end of the pipe portion 21d of the drive unit 20.
Furthermore, as the dust collector 30 slides, the connection surface of the inlet 31ba of the dust collector 30 approaches and comes into close contact with the connection surface of the packing 21dd provided at the outlet 21dc of the drive unit 20. At this time, the connection surface of the inlet 31ba and the connection surface of the outlet 21dc are parallel to each other and inclined to each other with respect to the installation direction, so that the sliding area between the connection surface of the inlet 31ba and the connection surface of the packing 21dd is reduced, and damage to the packing 21dd caused by the inlet 31ba rubbing against the packing 21dd is reduced.
Furthermore, as the dust collector 30 slides, the outlet at the end of the filter portion 32 of the dust collector 30 comes into contact with the packing 21ac of the air inlet 21aa of the drive unit 20 (see FIG. 6).

Next, removal of the dust collecting device 30 from the drive device 20 will be described. Fig. 9 is a diagram for explaining the state when the dust collecting device is removed with the right hand from the drive device in the vacuum cleaner of the first embodiment, and Fig. 10 is a diagram for explaining the state when the dust collecting device is removed with the left hand from the drive device in the vacuum cleaner of the first embodiment. Fig. 11 is another diagram for explaining the state when the dust collecting device is removed with the right hand from the drive device in the vacuum cleaner of the first embodiment, and Fig. 12 is another diagram for explaining the state when the dust collecting device is removed with the left hand from the drive device in the vacuum cleaner of the first embodiment.

According to this cleaner body 10, as shown in Figs. 2, 9 and 10, the user can easily remove the drive unit 20 from the dust collecting device 30 using either the left or right hand.
2 and 9, by gripping the dust collecting device 30 while pressing the clamp button 42a of the first locking mechanism M1 with the thumb of the right hand RH, the locking claw 42b of the first locking mechanism M1 is disengaged from the locking protrusion 41, and in this state, the dust collecting device 30 is slid in the direction opposite to the mounting direction (the direction of arrow A1, forward in this embodiment) until the engaging protrusion 52 reaches the wide portion of the engaging recess 51. Thereafter, by moving the dust collecting device 30 in the direction away from the pipe portion 21d (downward), the engaging protrusion 52 of the engaging mechanism M2 is disengaged from the engaging recess 51 (see FIGS. 7 and 8). Alternatively, when the recess 31c of the dust collecting device 30 abuts against the abutment protrusion 21df of the drive unit 20, the dust collecting device 30, which has been moving parallel to the pipe portion 21d of the drive unit 20 (in the direction of arrow A1), is guided in a direction away from the pipe portion 21d (in the direction of arrow A2), and the engaging protrusion 52 of the engaging mechanism M2 disengages from the engaging recess 51. As a result, the dust collecting device 30 is removed from the drive unit 20. Note that the left hand (not shown) is supporting, for example, the handle 21b of the drive unit 20.

10, the dust collecting device 30 can be removed from the drive device 20 in the same manner as described above by grasping the dust collecting device 30 with the left hand LH and sliding the dust collecting device 30 in the opposite direction to the mounting direction (arrow A1 direction) while pressing the clamp button 42a of the first locking mechanism M1 with the thumb. Alternatively, the dust collecting device 30 can be removed from the drive device 20 in the same manner as described above by grasping the dust collecting device 30 with the left hand LH so that the clamp button 42a of the first locking mechanism M1 can be pressed with the little finger, and sliding the dust collecting device 30 in the opposite direction to the mounting direction (arrow A1 direction) while pressing the clamp button 42a with the little finger.
Alternatively, if a user has large hands, as shown in Fig. 11, the dust collecting device 30 can be removed from the drive device 20 by grasping the dust collecting device 30 with the right hand RH from above the pipe portion 21d of the drive device 20 (straddling the pipe portion 21d) and sliding the dust collecting device 30 in the opposite direction to the mounting direction (arrow A1 direction) while pressing the clamp button 42a with the thumb. Also, as shown in Fig. 12, the dust collecting device 30 can be removed from the drive device 20 by grasping the dust collecting device 30 with the left hand LH from above the pipe portion 21d (straddling the pipe portion 21d) and sliding the dust collecting device 30 in the opposite direction to the mounting direction (arrow A1 direction) while pressing the clamp button 42a with the index finger.

In this way, according to the vacuum cleaner body 10, when attaching the dust collecting device 30 to the drive device 20, it is easy to position the dust collecting device 30 on the drive device 20 (align it before sliding), improving attachment ease.
In addition, when the dust collecting device 30 is attached to the drive unit 20, the second locking mechanism M3 is located on the pipe section 21d side of the drive unit 20, similar to the inlet 31ba, and is in a state where it cannot be touched by the user, so that the dust collecting device 30 itself will not be unintentionally detached during cleaning.

Furthermore, since the first locking mechanism M1 for attaching and detaching the drive unit 20 and the dust collecting device 30 is disposed on one side of both sides of the housing 21 (on the right side 21ar side in this embodiment), the dust collecting device 30 can be slid and removed while unlocking, improving usability. At this time, it is easy to release the lock and remove the dust collecting device 30 from the drive unit 20 with either the left or right hand. In other words, when the hand is bent into a C-shape with the thumb and the other four fingers to grasp the dust collecting device 30, the lock can be easily released with the thumb or a finger other than the thumb (for example, the index finger) because the first locking mechanism M1 is disposed on one side of both sides of the housing 21. Note that if the hook portion 21f is removed from the housing 21 and the first locking mechanism M1 is provided at this position, it becomes difficult to firmly grasp the dust collecting device 30 while unlocking it with either the right hand or the left hand.

Second Embodiment
In the first embodiment, the first locking mechanism M1 for attaching and detaching the driving device 20 and the dust collecting device 30 is disposed on the right side surface 21ar of the housing 21, but the first locking mechanism M1 may be disposed on the left side surface of the housing 21. Even in this case, the dust collecting device 30 can be easily detached from the driving device 20 with one hand, either the left or right hand, as described in Figs. 9 to 12.

Third Embodiment
In the vacuum cleaner body 10 of the first embodiment, as shown in Fig. 5, the outlet 21dc of the drive device 20 is disposed at a position slightly shifted in the left-right direction (to the right in Fig. 5) from the position directly below the pipe portion 21d, but the outlet 21dc may be disposed directly below the pipe portion 21d, or the outlet 21dc may be disposed outside the pipe portion 21d in the left-right direction. In these cases, the inlet 31ba of the dust collecting device 30 is disposed at a position connectable to the outlet 21dc of the drive device 20.
In the first embodiment, the outlet 21dc opens directly below the pipe portion 21d, so that the dust-containing air flows into the dust collection container 31 from the tangential direction (first tangential direction) of the peripheral wall portion 31b (see FIG. 8), but the outlet 21dc is not limited to opening directly below the pipe portion 21d. For example, the outlet 21dc may be configured to open diagonally downward, so that the dust-containing air flows into the dust collection container 31 from the outlet 21dc in the second tangential direction of the peripheral wall portion 31b. In this case, the second tangential direction is a direction that intersects with the first tangential direction at an acute angle when viewed from the front. In this case, the inlet 31ba of the dust collection device 30 is also disposed at a position that can be connected to the outlet 21dc of the drive device 20.

Fourth Embodiment
In the vacuum cleaner body 10 of the first embodiment, as shown in FIG. 8, the connection surface of the outlet 21dc of the drive unit 20 is inclined with respect to the sliding direction when the dust collector is attached and detached, but the connection surface of the outlet 21dc may be parallel to the sliding direction. The connection surface of the inlet 31ba of the dust collector 30 is parallel to the connection surface of the outlet 21dc of the drive unit 20 in this case. In this case, it is preferable that the connection surface of the outlet 21dc and the connection surface of the inlet 31ba do not contact each other until just before being locked by the first lock mechanism M1 (when the locking claw 42b contacts the locking protrusion 41), and contact each other from the time when the locking claw 42b starts to overcome the locking protrusion 41. By doing so, the sliding area between the connection surface of the inlet 31ba and the connection surface of the packing 21dd is reduced, and damage to the packing 21dd caused by the inlet 31ba rubbing against the packing 21dd is reduced.

Fifth Embodiment
In the first embodiment, the vacuum cleaner body 10 has a handle 21b, and the user grasps the handle 21b to use the vacuum cleaner, and a stick-type or handheld-type vacuum cleaner has been exemplified, but the present invention can also be applied to a canister-type vacuum cleaner. In the case of a canister-type vacuum cleaner, the vacuum cleaner body includes a wheeled drive unit with a built-in electric blower, and a dust collector mounted in a sideways state on the upper surface of the drive unit, and the structure for mounting the dust collector to the drive unit is the same as in the first embodiment.

(summary)
The vacuum cleaner of the present invention comprises a drive device having a housing that houses an electric blower for sucking up dust, a dust collecting device that is detachably attached to the housing so as to collect the sucked up dust and communicates with the electric blower, and a locking mechanism that releasably locks the attachment state of the dust collecting device to the housing;
the locking mechanism includes a first engaging portion provided on an outer surface of the housing, and a second engaging portion provided on an outer surface of the dust collecting device so as to be engageable with and disengageable from the first engaging portion,
The housing has two sides,
When the dust collecting device is attached to the housing, the locking mechanism is disposed on one of the two side surfaces of the housing.
According to this configuration, when performing maintenance on the dust collecting device, a user can operate the locking mechanism to release the lock while holding the dust collecting device with one hand and remove it from the drive device. At this time, since the locking mechanism is located on the left or right side of the housing, the user can easily release the lock and remove the dust collecting device using either the left or right hand.

The vacuum cleaner of the present invention may be configured as follows, or these may be combined as appropriate.

The dust collecting device is cylindrical,
the housing has a first contact portion that contacts one end of the dust collecting device in a longitudinal direction when the dust collecting device is attached, and a second contact portion that contacts an outer circumferential surface of the dust collecting device when the dust collecting device is attached,
The first locking portion is provided on the first abutment portion,
The second engaging portion is provided on the outer circumferential surface of the one end side of the dust collecting device,
the dust collecting device is slid along the second abutment portion of the housing in a mounting direction of the first abutment portion to bring the one end close to the first abutment portion, whereby the second locking portion is engaged with the first locking portion and the dust collecting device is mounted to the housing;
The dust collecting device may be configured to be removed from the housing by operating the locking mechanism of the dust collecting device attached to the housing to disengage the second engaging portion from the first engaging portion, and in this state sliding the dust collecting device in a direction opposite to the mounting direction.
According to this configuration, since the dust collector can be attached and detached by sliding it relative to the drive device, the dust collector can be easily positioned relative to the drive device when attached, and the ease of attachment is improved. In other words, in the present invention, the dust collector can be attached by simply sliding one end of the dust collector toward the first contact portion of the drive device, which is the major target, so there is no need to insert the locking portion of the dust collector into the small fulcrum portion of the attachment portion of the drive device to position it and then rotate the dust collector, as in Patent Document 1.

In the lock mechanism, the first locking portion is a locking protrusion provided on an outer surface of the first contact portion, and the second locking portion is a lock main body portion that is capable of engaging with and disengaging from the locking protrusion provided on an outer surface of the one end of the dust collecting device,
the lock body portion has a clamp button pivotally mounted to an outer surface of the one end face portion so as to be capable of swinging, a locking claw provided on the clamp button, and a biasing member biasing the clamp button in a direction in which the locking claw locks onto the locking protrusion,
the dust collecting device is slid along the second contact portion of the housing in a mounting direction of the first contact portion to bring the one end closer to the first contact portion, whereby the locking claw is locked to the locking portion, and the dust collecting device is mounted to the housing;
The dust collecting device may be configured such that, by pressing the clamp button of the dust collecting device attached to the housing, the locking claw swings against the biasing force of the biasing member and disengages from the locking portion, and in this state, the dust collecting device can be removed from the housing by sliding the dust collecting device in a direction opposite to the mounting direction.
According to this configuration, removal can be performed in one step by sliding the dust collecting device while holding the dust collecting device and pressing the clamp button.

A first engagement portion is provided on the second contact portion of the housing,
a second engagement portion that is engageable with and disengageable from the first engagement portion is provided on an outer surface of the dust collecting device,
When the dust collecting device is attached to the housing, the dust collecting device is slid in the attachment direction, so that the second engagement portion engages with the first engagement portion,
The second engagement portion may be disengaged from the first engagement portion by sliding the dust collecting device attached to the housing in the reverse direction.
According to this configuration, the other end side of the dust collecting device can be held by the second contact portion of the driving device.

The first engagement portion is an engagement recess,
the second engagement portion is an engagement protrusion that can be inserted into the engagement recess,
When the dust collecting device is attached to the housing, the dust collecting device is slid in the attachment direction, so that the engagement protrusion is inserted into and engaged with the engagement recess,
The dust collecting device attached to the housing may be slid in the reverse direction, whereby the engaging protrusion is pulled out from within the engaging recess and separated.
According to this configuration, it is possible to simplify the structure in which the first engagement portion and the second engagement portion can be engaged and disengaged with each other in the sliding direction.

The second abutment portion may have a plate-shaped thick portion that constitutes the engagement recess and is sandwiched between the outer surface of the dust collecting device and the engagement protrusion when the engagement protrusion is inserted into the engagement recess.
According to this configuration, when the dust collector is attached to the drive unit, the outer surface of the dust collector and the engaging protrusion are easily pressed against the thick-walled portion on the drive unit side, so that the dust collector is prevented from wobbling in the direction away from the drive unit. Also, since the thick-walled portion is thicker and stronger than the surrounding portion, the thick-walled portion is less likely to be damaged even if the dust collector is repeatedly attached to and detached from the drive unit.

The thick portion has a notch extending in the mounting direction,
The engaging protrusion may have an insertion rib that slides in the mounting direction and is inserted into the notch.
According to this configuration, the engaging protrusion is reinforced. Also, the insertion rib abuts against the notch, so that the dust collecting device is prevented from wobbling in the left-right direction relative to the drive device.

The dust collecting device includes a cylindrical dust collecting container having a bottom, a peripheral wall, and an opening on an opposite side to the bottom, a filter unit provided on the one end side so as to be detachable from the opening of the dust collecting container, and a second locking mechanism which releasably locks a connection state between the opening of the dust collecting container and the filter unit,
the second contact portion has a storage recess capable of storing the second lock mechanism,
The second locking mechanism may be disposed on the second contact portion side so as to be housed within the housing recess when the dust collecting device is attached to the housing.
According to this configuration, when the dust collecting device is attached to the drive device, the second locking mechanism is stored in the storage recess so that the user cannot touch it, which prevents the second locking mechanism from being accidentally released during cleaning with the vacuum cleaner, causing the dust collecting container and the filter unit of the dust collecting device to separate.

an outlet through which dust-containing air that has flowed into the housing can be sent to the dust collection container is provided in the second contact portion;
an inlet connectable to the outlet is provided on an outer surface of the dust collection container;
an exhaust port capable of discharging air from which dust has been removed by passing through the filter portion is provided at the one end of the dust collecting device;
an air inlet that can be connected to the exhaust port so as to introduce the air from which the dust has been removed into the housing is provided in the first contact portion;
a connection surface of the outlet with the inlet inclined toward the dust collecting device when the dust collecting device is attached to the housing as the connection surface of the outlet extends in the attachment direction,
A connecting surface of the inlet of the dust collecting device with the outlet may be inclined so as to be parallel to a connecting surface of the outlet.
According to this configuration, when the dust collector is slid in the mounting direction to the drive unit and mounted, the inlet of the dust collector is pressed against the outlet of the drive unit, resulting in a connection structure with improved airtightness. Note that a packing may be provided on the outlet or outlet side, in which case the packing is less likely to be damaged because sliding of the outlet or outlet against the packing is reduced.

The dust collection container has a recess between the outer surface of the peripheral wall and the bottom,
The second contact portion may be provided with a contact protrusion that can come into contact with the recess when the dust collecting device attached to the housing is slid in the reverse direction.
According to this configuration, when the dust collecting device attached to the drive unit is slid in the reverse direction, after the recessed portion hits the contact protruding portion, the dust collecting device can be naturally guided in a direction away from the drive unit (without the user's operation). Note that the dust collecting device can be guided more smoothly by providing a rounded or inclined surface on at least one of the recessed portion and the contact protruding portion.

It should be noted that the disclosed embodiments are to be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

REFERENCE SIGNS LIST 1 Vacuum cleaner 20 Drive device 21 Housing 21a Electric blower storage section (first contact section)
21aa: air inlet 21d: pipe portion (second contact portion)
21dc Outlet 21de Storage recess 21df Contact protrusion 22 Electric blower 30 Dust collection device 31 Dust collection container 31a Bottom 31b Peripheral wall 31ba Inlet 31c Recess 32 Filter 41 Locking protrusion (first locking portion)
42 Lock body portion (second locking portion)
42a: clamp button 42b: locking claw 42c: biasing member 51: engagement recess (first engagement portion)
51a Thick portion 51b Cut portion 52 Engagement protrusion (second engagement portion)
52a Insertion rib M1 First locking mechanism M2 Engagement mechanism M3 Second locking mechanism

Claims (10)

The dust collector includes a drive unit having a housing that houses an electric blower for sucking dust, a dust collector that is detachably attached to the housing so as to collect the sucked dust and communicates with the electric blower, and a locking mechanism that releasably locks the attachment state of the dust collector to the housing,
The housing includes a straight pipe portion,
The dust collecting device is cylindrical having an outer circumferential surface,
the locking mechanism includes a first locking portion provided on an outer surface of the housing, a second locking portion provided on an outer peripheral surface of the dust collecting device so as to be engageable with and disengaged from the first locking portion, and an operation portion that enables an operation to release an engaged state between the first locking portion and the second locking portion,
The outer surface of the housing has two side surfaces sandwiching the pipe portion,
when the dust collecting device is attached along the pipe portion of the housing, the operation portion of the locking mechanism is disposed on only one of the two side surfaces of the housing on an outer circumferential surface of the dust collecting device ,
This electric vacuum cleaner is characterized in that the dust collecting device can be removed by sliding it in a direction parallel to the pipe portion relative to the housing while grasping the outer peripheral surface of the dust collecting device with one hand and releasing the operating part with the thumb or index finger . The dust collecting device is cylindrical,
the housing has a first contact portion that contacts one end of the dust collecting device in a longitudinal direction when the dust collecting device is attached, and a second contact portion that contacts an outer circumferential surface of the dust collecting device when the dust collecting device is attached,
The first locking portion is provided on the first abutment portion,
The second engaging portion is provided on the outer circumferential surface of the one end side of the dust collecting device,
the dust collecting device is slid along the second abutment portion of the housing in a mounting direction of the first abutment portion to bring the one end close to the first abutment portion, whereby the second locking portion is engaged with the first locking portion and the dust collecting device is mounted to the housing;
2. The vacuum cleaner according to claim 1, wherein the dust collecting device is configured to be removed from the housing by operating the locking mechanism of the dust collecting device attached to the housing to disengage the second engaging portion from the first engaging portion, and then sliding the dust collecting device in this state in a direction opposite to the mounting direction. In the lock mechanism, the first locking portion is a locking protrusion provided on an outer surface of the first contact portion, and the second locking portion is a lock main body portion that is engageable with and disengageable from the locking protrusion provided on an outer surface of the one end of the dust collecting device,
The lock body includes a clamp button pivotally attached to an outer surface of the one end surface portion so as to be swingable.
a locking claw provided on the clamp button; and a biasing member that biases the clamp button in a direction in which the locking claw locks onto the locking protrusion,
the dust collecting device is slid along the second contact portion of the housing in a mounting direction of the first contact portion to bring the one end closer to the first contact portion, whereby the locking claw is locked to the locking portion, and the dust collecting device is mounted to the housing;
3. The vacuum cleaner according to claim 2, wherein the dust collecting device is configured such that, when the clamp button of the dust collecting device attached to the housing is pressed, the locking claw swings against the biasing force of the biasing member and disengages from the locking portion, and when the dust collecting device is in this state slid in a direction opposite to the mounting direction, the dust collecting device can be removed from the housing. a first engagement portion is provided on the second contact portion of the housing,
a second engagement portion that is engageable with and disengageable from the first engagement portion is provided on an outer surface of the dust collecting device,
When the dust collecting device is attached to the housing, the dust collecting device is slid in the attachment direction, so that the second engagement portion engages with the first engagement portion,
The vacuum cleaner according to claim 2 or 3, wherein the second engagement portion is disengaged from the first engagement portion by sliding the dust collecting device attached to the housing in the reverse direction. The first engagement portion is an engagement recess,
the second engagement portion is an engagement protrusion that can be inserted into the engagement recess,
When the dust collecting device is attached to the housing, the dust collecting device is slid in the attachment direction, so that the engagement protrusion is inserted into and engaged with the engagement recess,
5. The electric vacuum cleaner according to claim 4, wherein the engaging protrusion is pulled out of the engaging recess by sliding the dust collecting device attached to the housing in the reverse direction. The vacuum cleaner according to claim 5, wherein the second contact portion forms the engagement recess and has a plate-shaped thick portion that is sandwiched between the outer surface of the dust collector and the engagement protrusion when the engagement protrusion is inserted into the engagement recess. The thick portion has a notch extending in the mounting direction,
The electric vacuum cleaner according to claim 6, wherein the engaging protrusion has an insertion rib that slides in the mounting direction and is inserted into the notch. the dust collecting device includes a cylindrical dust collecting container having a bottom, a peripheral wall, and an opening on an opposite side to the bottom, a filter unit provided on the one end side and detachable from the opening of the dust collecting container, and a second locking mechanism that releasably locks a joined state between the opening of the dust collecting container and the filter unit,
the second contact portion has a storage recess capable of storing the second lock mechanism,
The vacuum cleaner according to any one of claims 2 to 7, wherein when the dust collecting device is attached to the housing, the second locking mechanism is arranged on the second contact portion side so as to be stored in the storage recess. an outlet through which dust-containing air that has flowed into the housing can be discharged to the dust collection container is provided in the second contact portion,
an inlet connectable to the outlet is provided on an outer surface of the dust collection container;
an exhaust port capable of discharging air from which dust has been removed by passing through the filter portion is provided at the one end of the dust collecting device;
an air inlet that can be connected to the exhaust port so as to introduce the air from which the dust has been removed into the housing is provided in the first contact portion;
a connection surface of the outlet with the inlet inclined toward the dust collecting device when the dust collecting device is attached to the housing as the connection surface of the outlet extends in the attachment direction,
The vacuum cleaner according to any one of claims 1 to 8, wherein a connecting surface of the inlet of the dust collecting device connected to the outlet is inclined so as to be parallel to a connecting surface of the outlet. The dust collection container has a recess between an outer surface of the peripheral wall and the bottom,
The vacuum cleaner according to any one of claims 2 to 9, wherein the second contact portion is provided with a contact protrusion that can contact the recess when the dust collecting device attached to the housing is slid in the reverse direction.

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