JP7539225B2 - Cyclone vacuum cleaner - Google Patents

Description

This invention relates to a cyclone vacuum cleaner, and more specifically to a vacuum cleaner in which the axis of the suction pipe and the axis of the approximately cylindrical cyclone dust collecting container are approximately parallel.

In recent years, small, lightweight, battery-powered cyclone vacuum cleaners have become popular, in which the user holds the main body of the vacuum cleaner. This type of vacuum cleaner has a suction port, a straight extension pipe, and the main body of the vacuum cleaner at the rear end of the extension pipe, and the user holds the main body to clean floors and the like (see, for example, Patent Document 1).
In the vacuum cleaner shown in Patent Document 1, the extension pipe and the suction pipe of the vacuum cleaner body connected to it are designed to be slender in order to realize an easy-to-use, sophisticated appearance and a lightweight design. Furthermore, the axis of the suction pipe and the axis of the approximately cylindrical cyclone dust collector are arranged to be approximately parallel to each other in a plane along the vertical direction.

JP 2018-075189 A

In a cyclone dust collector, dust-laden air is introduced into a cylindrical dust container with a bottom so as to flow along the circumference of the container, and the dust is separated by centrifugal force. The introduction section through which the airflow flows into the dust container is generally provided with one end on an extension of a tangent to the circumference.
In addition, when the axis of the dust container is located below the axis of the suction pipe as in the vacuum cleaner of Patent Document 1, the dust container is attached to the vacuum cleaner body from below toward above. The dust container is attached to the vacuum cleaner body with the inlet facing almost directly upward. In this case, the airflow flowing into the dust container through the extension pipe and the suction pipe turns once to the left or right at the outlet of the suction pipe, then turns further downward before flowing into the dust container.
When the flow path near the inlet is bent twice as described above, the flow path becomes complicated and resistance increases. Furthermore, a part that protrudes to the left or right from the suction pipe near the inlet of the dust collection container must be formed at the end of the suction pipe, which goes against the requirements for weight reduction and a refined appearance.

This invention provides a vacuum cleaner that takes the above circumstances into consideration.

This invention provides a vacuum cleaner that includes a suction pipe section having a suction port that opens at the front end with its axis in the front-rear direction and an outlet port in the side wall of the rear end through which the airflow sucked in from the suction port flows out; a cyclone-type dust collection container that has a generally bottomed cylindrical shape and is attached below the suction pipe section so that its central axis overlaps with the axis of the suction pipe section in the up-down direction perpendicular to the front-rear direction; and an electric blower that sucks in air from inside the attached dust collection container to generate an airflow along the periphery of the dust collection container, and the dust collection container has a peripheral sidewall whose base end is connected to the periphery without any steps and extends linearly from the periphery, and a central sidewall that faces the peripheral sidewall, and is equipped with an introduction section that protrudes in the tangential direction, has an opening at the tip end and is airtightly connected to the outlet port.

The vacuum cleaner of this invention has a sophisticated appearance.

1 is a perspective view showing a vacuum cleaner according to a first embodiment. 2 is a front perspective view of a vacuum cleaner body of the electric vacuum cleaner shown in FIG. 1, viewed obliquely from above. FIG. 3 is a perspective view of the vacuum cleaner body shown in FIG. 2 as viewed obliquely from below and behind. FIG. FIG. 3 is a left sectional view of the vacuum cleaner body shown in FIG. 2 . FIG. 3 is a right-side cross-sectional view of the vacuum cleaner body shown in FIG. 2 . 3 is a perspective view of the vacuum cleaner body shown in FIG. 2 with the battery removed, as viewed obliquely from below and behind. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4. FIG. 3 is a front view of the vacuum cleaner body shown in FIG. 2 as viewed from the front. FIG. 7 is an explanatory diagram in which a tangent line tangent to the circumference of the suction pipe section and the circumference of the dust collecting container and a line tangent to the circumference of the suction pipe section farther from the peripheral side wall and passing through the central axis of the dust collecting container are added.

The present invention will be described in more detail below with reference to the drawings. Note that the following description is illustrative in all respects and should not be construed as limiting the present invention.
(Embodiment 1)
In this embodiment, a cordless stick type vacuum cleaner will be specifically described as an example.

Fig. 1 is a perspective view of the vacuum cleaner according to this embodiment, Fig. 2 is a perspective view of the vacuum cleaner body of the vacuum cleaner shown in Fig. 1 as viewed obliquely from above and at the front, and Fig. 3 is a perspective view of the vacuum cleaner body shown in Fig. 2 as viewed obliquely from below and at the rear. Fig. 4 is a left sectional view of the vacuum cleaner body shown in Fig. 2, and Fig. 5 is a right sectional view of the vacuum cleaner body shown in Fig. 2. Fig. 6 is a perspective view of the vacuum cleaner body shown in Fig. 2 with the battery removed as viewed obliquely from below and at the rear.
7 is a cross-sectional view taken along line AA of FIG. 4, and FIG. 8 is a front view of the cleaner body shown in FIG. 2 as viewed from the front.
In FIG. 2, the front-rear, up-down, left-right directions of the vacuum cleaner body are indicated by arrows. The axis of the extension pipe 60 and the suction pipe section 21b to which one end is connected are the front-rear direction. The side to which the suction port body 50 is connected to the extension pipe 60 is the front, and the side to which the suction pipe section 21b is connected is the rear. The front end of the suction pipe section 21b is formed with an air intake port 21ba, which is a circular opening, and the axis of the suction pipe section 21b passes through the center of the air intake port 21ba. The dust collecting device 30 including the substantially cylindrical dust collecting container 31 is attached in parallel with the axis of the suction pipe section 21b. The up-down direction is along a plane including the axis of the suction pipe section 21b and the central axis of the dust collecting container 31, and is perpendicular to the front-rear direction. The side with the operation switch section 21d is the upper side, and the side with the battery mounting section 21f is the lower side. The left-right direction is based on the state facing forward.

The stick-type cordless electric vacuum cleaner 1 shown in FIG. 1 comprises a vacuum cleaner body 10, a battery 40 that is removably attached to the vacuum cleaner body 10, a suction port body 50, the vacuum cleaner body 10, and an extension pipe 60. One end of the extension pipe 60 is removably connected to the vacuum cleaner body 10, and the other end is removably connected to the suction port body 50.

As shown in FIGS. 1 to 8, a cleaner body 10 is roughly divided into a drive device 20 incorporating an electric blower 22 and a dust collecting device 30 detachably attached to the drive device 20. As shown in FIG.
The driving device 20 has a housing 21, an electric blower 22 provided in the housing 21, and an electric circuit including a control circuit board 23 provided in the housing 21. Note that the control circuit board 23 has various circuits mounted on its board, including a CPU, a ROM storing a program, a RAM, and an input/output interface.

The housing 21 has an electric blower housing section 21a, a suction pipe section 21b, a handle section 21c, an operation switch section 21d, a battery mounting section 21f, and a holder section 21h (see FIG. 2). The housing 21 is made of a thermoplastic resin such as ABS resin or polycarbonate resin.
The surface of the holder portion 21h is covered with a flexible material (e.g., rubber) so as to be non-slip and unlikely to damage furniture or the like even if it comes into contact with it.
The electric blower housing section 21a houses the electric blower 22, the control circuit board 23, etc. The suction pipe section 21b is connected to the upper front end of the electric blower housing section 21a and protrudes forward. The handle section 21c connects the rear end of the suction pipe section 21b to the rear end of the electric blower housing section 21a. The operation switch section 21d is provided on the handle section 21c. The operation switch section 21d has, for example, a power switch for switching the power supply ON or OFF and a power switch for switching the output of the electric blower 22 between strong and weak, etc., and is electrically connected to the control circuit board 23 via a lead wire (not shown).

The handle portion 21c is shaped like a figure 7 turned on its side, and an operation switch portion 21d is provided near a bent portion where the long side and short side of the figure 7 are connected. More specifically, the long side of the handle portion 21c extends obliquely upward from the front end toward the rear. The rear end of the long side is connected to the front end of the short side that extends obliquely downward toward the rear near the upper rear end of the electric blower storage portion 21a. The rear end of the short side extends obliquely downward toward the front behind the electric blower storage portion 21a and near the upper rear end of the battery 40, and is connected to the rear of the electric blower storage portion 21a. The rearmost end of the handle portion 21c is located rearward of the battery 40.
Gripping the long side of the handle portion 21c makes it easy to keep the vacuum cleaner body 10 approximately horizontal to the floor surface, which is suitable when moving the suction mouth body 50 to clean under a chair or in a deep gap. In addition, since the mass of the vacuum cleaner body 10 with the extension pipe 60 removed is largely made up of the electric blower 22 and the battery 40, the vacuum cleaner body 10 can be easily handled because it can be gripped at a point close to the center of gravity.
On the other hand, when the user grips the short side, the user can easily move the suction mouth body 50 on the floor surface in front of him/her while maintaining an upright posture.

The vacuum cleaner body 10 from which the extension pipe 60 is removed can be used as a handheld vacuum cleaner. In consideration of this case, a rotatable brush may be attached to the tip of the suction pipe portion 21b.
In addition, instead of the rotatable brush, a separate brush that can be inserted into the intake port 21ba may be used. Also, the suction port body 50 may be directly connected to the intake port 21ba without using the extension pipe 60.

The holder section 21h is fixed integrally with the electric blower storage section 21a. As shown in Fig. 1, when the suction port body 50 and the extension pipe 60 are connected and the user is using the cordless vacuum cleaner 1, the holder section 21h is used to hang the cordless vacuum cleaner 1 on the back of a chair or the edge of a desk to stand it up when cleaning is temporarily stopped. Alternatively, the holder section 21h is used to hang the cordless vacuum cleaner 1 on the edge of furniture or the like for storage.
In addition, when the user places the cordless electric vacuum cleaner 1 face down on a flat floor surface, such as when the user temporarily stops cleaning, the holder portion 21h protruding from the bottom end of the vacuum cleaner body 10 functions as a leg that supports the vacuum cleaner body 10 on the floor surface.

A dust collector 30 is detachably mounted in front of the electric blower housing section 21a and below the suction pipe section 21b in the housing 21. A battery mounting section 21f is provided at the lower rear end of the electric blower housing section 21a, and a battery 40 is detachably mounted therein.
An intake port 21ba is provided at the front end of the suction pipe section 21b of the housing 21, and an outlet port 21bb is provided on the side wall of the lower part of the suction pipe section 21b. An intake port 21ab is provided at the front end of the electric blower storage section 21a of the housing 21, and an exhaust port 21aa is provided on the right side surface of the electric blower storage section 21a.

Next, a description will be given of the dust collecting device 30. The dust collecting device 30 has a dust collecting container 31 and a filter unit 32 which is detachable from the dust collecting container 31.
The dust-collecting container 31 is formed in a cylindrical shape with a bottom and a dust disposal port, and an inlet portion 31a is provided on a part of the periphery of the dust-collecting container 31. The tip of the inlet portion 31a is open and serves as an inlet port.
The filter section 32 has a cup section 32a, a mesh-like inner cylinder section 32b, and a filter body 32c. The cup section 32a has a hole at its center that leads to the mesh-like inner cylinder section 32b, and is detachably fitted into the dust disposal opening of the dust collection container 31. The mesh-like inner cylinder section 32b is housed in the dust collection container 31 with one end connected to the periphery of the hole of the cup section 32a. The filter body 32c is housed in the cup section 32a.

When the dust collection device 30 is attached to the vacuum cleaner body 10, the outlet 21bb of the suction pipe section 21b and the inlet section 31a of the dust collection container 31 are airtightly connected (see FIG. 7). Also, when the filter body 32c of the filter section 32 is housed, the opening of the cup section 32a and the inlet 21ab of the electric blower storage section 21a are airtightly connected (see FIG. 5). In this way, a ventilation path driven by the electric blower 22 is formed inside the vacuum cleaner body 10.

That is, when cleaning a floor surface or the like with the cordless electric vacuum cleaner 1, the electric blower 22 of the vacuum cleaner body 10 is driven, and dust-containing air is sucked from the suction port body 50 and flows into the suction pipe section 21b of the vacuum cleaner body 10 through the extension pipe 60 (indicated by arrow F1 in FIG. 4). The dust-containing air that flows into the suction pipe section 21b flows into the dust collection container 31 through the outlet 21bb and the introduction section 31a. Some of the relatively large dust particles in the dust-containing air are centrifuged in the dust collection container 31, and the remaining dust particles are captured by the mesh-shaped inner tube section 32b. Air containing even finer dust particles than those captured by the mesh-shaped inner tube section 32b passes through the inside of the mesh-shaped inner tube section 32b and passes through the filter body 32c. The fine dust particles are captured by the filter body 32c (indicated by arrow F2 in FIG. 4). The air from which fine dust particles have been removed by the filter body 32c flows into the electric blower housing 21a, passes through the electric blower 22 and the control circuit board 23, and is exhausted to the outside from the exhaust port 21aa (indicated by the arrow F3 in FIG. 4).

As shown in Fig. 4 and Fig. 5, the rotation axis of the electric blower 22, the central axis of the bottomed cylindrical dust collection container 31, and the central axis of the mesh-like inner cylindrical portion 32b are concentric, and the dust collection device 30 and the electric blower storage portion 21a that house them also have a generally concentric cylindrical appearance, and their central axes are parallel to the axis of the extension pipe 60. Furthermore, the battery mounting portion 21f is located behind the electric blower storage portion 21a, and when the battery 40 is attached to the battery mounting portion 21f, the battery 40 is exposed at the bottom of the rear end of the electric blower storage portion 21a. Furthermore, the long sides of the extension pipe 60, the suction pipe portion 21b, and the handle portion 21c are continuous in the front-rear direction. With this layout, the cordless vacuum cleaner 1 gives the impression of being slim and elongated in the front-rear direction.
As shown in Figs. 4, 5 and 7, the axis of the suction pipe portion 21b and the central axis of the dust collection container 31 and the mesh-like inner cylinder portion 32b are on the same plane in the vertical direction.

The flow path from the suction pipe portion 21b to the dust collection container 31 will be further described.
As shown in FIGS. 2 and 8, the dust collecting device 30 has an introduction portion 31a that extends linearly from the periphery of the dust collecting container 31 in a substantially tangential direction.
7, the introduction part 31a is a pipe having a rectangular cross section and made up of a peripheral sidewall 31aa whose base end is connected to the periphery of the dust collection container 31 without any step and extends linearly in a substantially tangential direction, a center sidewall 31ab opposed to the peripheral sidewall, and front and rear sidewalls. The base end of the introduction part 31a communicates with the dust collection container 31, and the tip end is open.

As shown in Fig. 7, the peripheral side wall 31aa faces in an inclined direction without coinciding with any of the up, down, left and right directions when viewed from the front. The tip of the introduction part 31a is approximately perpendicular to the peripheral side wall 31aa, and therefore the opening of the tip is connected to the outlet 21bb in the side wall of the suction pipe part 21b from an inclined direction without coinciding with any of the up, down, left and right directions. A packing material (not shown) is arranged around the outlet 21bb to maintain airtightness.
In order to allow the dust collecting device 30 including the dust collecting container 31 to be attached from below to above, the suction pipe section 21b is cut out from the outlet 21bb downward around the outlet 21bb. However, the outlet 21bb opens in an oblique direction corresponding to the tip of the introduction section 31a (see FIG. 7).

By opening the outlet 21bb in an oblique direction toward the periphery of the dust collection container 31, it is possible to align the direction of the tube of the introduction part 31a, i.e., the direction of the peripheral side wall 31aa, and form a thick flow passage connecting the suction pipe part 21b and the dust collection container 31. In addition, a simple path for the airflow from the suction pipe part 21b to the dust collection container 31 can be realized.
The tip of the introduction part 31a does not necessarily have to be substantially perpendicular to the peripheral side wall 31aa as shown in Fig. 7. However, in that case, the connection part between the outlet 21bb and the introduction part 31a will be oblique to the direction of the tube of the introduction part 31a. If the oblique angle becomes sharper, the perimeter of the connection part will be larger than that of Fig. 7 for a flow path of the same diameter, and a larger packing material will be required. Also, when the dust collector 30 is installed, the tip of the introduction part 31a is pressed against the outlet 21bb to maintain airtightness, and a larger pressing force is required for a packing material with a larger perimeter.

Figure 9 is a cross-sectional view corresponding to Figure 7, and is an explanatory diagram in which a tangent line contacting the circumference of the suction pipe section 21b and the circumference of the dust collection container 31 and a line contacting the circumference of the suction pipe section 21b farther from the peripheral side wall 31aa and passing through the central axis P of the dust collection container 31 have been added.
The straight line B-B shown by the two-dot chain line is a left tangent line that touches on the left side the circumference of the suction pipe portion 21b and the circumference of the dust collection container 31. Note that Fig. 9 is a view seen from the front, and the right side of the drawing is the left side in the left-right direction as shown in Fig. 2. Similarly, the straight line C-C shown by the two-dot chain line is a right tangent line.
In addition, the straight line D-D indicated by the dotted line is a line that touches the circumference of the suction pipe section 21b that is farther from the peripheral side wall 31aa (the right-hand circumference of the suction pipe section 21b in Figure 7, since the peripheral side wall 31aa is on the left side) and passes through the central axis P of the dust collecting container.

9, the peripheral sidewall 31aa and the outlet 21bb adjacent to its tip are both located within the region between the left tangent line B--B and the right tangent line C--C. The same is true for the center sidewall 31ab.
To narrow this area further, the peripheral side wall 31aa and the central side wall 31ab are both located in the area between the left tangent line B--B and the straight line D--D. In other words, both are located on the same side of the straight line D--D.

(Embodiment 2)
As shown in Figures 4, 5 and 8, in the suction pipe section 21b, as it proceeds from the circular periphery of the intake port 21ba to the rear end side, the lower and left and right inner walls approach the axis and the pipe narrows, forming a narrow section 21bc. Note that the upper inner wall does not approach the axis even at the rear end side. As the airflow proceeds from the intake port 21ba to the narrow section 21bc at the rear end, the inner wall of the suction pipe section 21b smoothly narrows, and the flow speed increases accordingly. The airflow with increased speed flows into the dust collection container 31 from the outlet 21bb, swirls vigorously around the inner circumference of the dust collection container 31, and the dust contained in the airflow is centrifuged.
In addition, since there may be an embodiment in which the isthmus 21bc is not formed, this embodiment is described separately from the embodiment 1. That is, the configuration of the embodiment 1 is not based on the configuration of the isthmus 21bc according to this embodiment. However, the combination as shown in the figure may be possible.

(Embodiment 3)
7, the tip of the introduction part 31a is connected to the outlet 21bb located diagonally below the suction pipe part 21b, and a part of the tip of the introduction part 31a protrudes inside the circumference of the intake port 21ba in a front view. A part of the tip of the introduction part 31a protrudes further inward than the lower inner wall of the isthmus 21bc.
According to this embodiment, the suction pipe section 21b has an inner wall in a portion forward of the outlet 21bb that is smoothly raised from the front to the outlet 21bb at the rear. That is, an outlet front raised portion 21bd is formed in a portion forward of the outlet 21bb. As shown in Fig. 8, when viewed from the front, the tip of the inlet 31a is hidden in the most raised portion at the rear end of the outlet front raised portion 21bd.

The outlet front raised portion 21bd is formed only in the diagonally lower portion of the suction pipe portion 21b where the outlet 21bb is formed.
Due to the formation of the outlet front raised portion 21bd, the airflow passing through the intake port 21ba is once drawn toward the axial center just before the outlet 21bb, and then flows out obliquely downward from the outlet 21bb on the side. The outlet front raised portion 21bd ensures a smooth airflow.
In addition, there may be an embodiment in which the outlet front raised portion 21bd is not formed. For example, if the tip of the introduction portion 31a is made to coincide with the circumference of the intake port 21ba in a front view, the tip will not protrude into the inside of the suction pipe portion 21b. Therefore, it is described separately from the first and second embodiments. That is, the configurations of the first and second embodiments are not premised on the configuration of the outlet front raised portion 21bd according to this embodiment. However, the combination as shown in the figure is possible.

As mentioned above,
(i) An electric vacuum cleaner according to the present invention comprises a suction pipe section having a suction port that opens at its front end with its axis in the front-to-rear direction and an outlet port in a side wall at its rear end through which airflow sucked in from the suction port flows out; a cyclone-type dust collecting container having a substantially bottomed cylindrical shape and mounted below the suction pipe section so that its central axis overlaps with the axis of the suction pipe section in a vertical direction perpendicular to the front-to-rear direction; and an electric blower that sucks in air from inside the mounted dust collecting container to generate an airflow along the periphery of the dust collecting container, wherein the dust collecting container has a peripheral sidewall whose base end is connected to the periphery without any step and extends linearly from the periphery, and a central sidewall that faces the peripheral sidewall, and is characterized in that it has an introduction section that protrudes in the tangential direction, has an opening at its tip end and is airtightly connected to the outlet port.

In this invention, the front-to-rear direction of the vacuum cleaner is the direction along the axis of the suction pipe, and the side with the suction port is the front. The vacuum cleaner may be used tilted, but in this specification, the front-to-rear direction is based on the direction of the suction pipe. The up-down direction is a direction perpendicular to the front-to-rear direction, and the left-to-right direction is a direction perpendicular to both the front-to-rear direction and the up-to-down direction.

The axis of the suction pipe section and the central axis of the dust collection container overlap in a plan view and are approximately parallel in a side view. Approximately parallel means that the angle between the two axes in a side view is within ±10 degrees.

The dust collecting container has an inlet. The peripheral side wall of the inlet has a base end that is connected to the peripheral portion without any step and extends linearly, so that the inlet protrudes in the tangential direction. The opening at the tip of the inlet is airtightly connected to the outlet of the side wall of the suction pipe.
In general, a cyclone-type dust collection container separates dust contained in an airflow by circulating the airflow around the circumference of a cylindrical dust collection container. The inlet for introducing the airflow into the dust collection container is located near the circumference of the container in the radial direction of the dust collection container, and a flow path is located in the center that communicates with an electric blower that sucks air into the dust collection container.
On the other hand, the outlet of the suction pipe is airtightly connected to the introduction part, and the diameter of the suction pipe is slightly larger than that of the outlet, so that the diameter of the dust collection container is generally larger than that of the suction pipe.

The dust collection container is positioned below the suction pipe section, with its central axis overlapping the axis of the suction pipe section in the vertical direction. The peripheral side wall of the introduction section, which extends in a straight line in the tangential direction of the circumference of the dust collection container and is connected to the outlet of the suction pipe section, which has a smaller diameter than the dust collection container, is inclined in the vertical direction when the dust collection container is attached, forming a linear flow path from the rear end side wall of the suction pipe section to the circumference of the dust collection container, and the airflow swirls along the inner circumference of the dust collection container.

Further, preferred embodiments of the present invention will be described.
(ii) The peripheral side wall of the attached dust collection container may be inclined so that the distance from the central axis in a left-right direction perpendicular to both the front-to-rear direction and the up-down direction becomes smaller as the peripheral side wall approaches the upper end opening.
In this way, a simple path for the airflow from the suction pipe to the dust collection container is realized, along the peripheral side wall which is inclined so that the base end is connected to the peripheral portion without any steps, extends in a straight line, and becomes smaller in distance from the central axis as it approaches the tip opening.

(iii) The outlet may be rectangular, and in a left-right direction perpendicular to both the front-to-rear direction and the up-down direction, the peripheral side wall and one side of the outlet corresponding thereto may be located in an area sandwiched between a left tangent that contacts the circumference of the suction pipe section and the circumference of the dust collecting container from the left side and a right tangent that contacts the circumference of the dust collecting container from the right side.
In this way, a flow path is formed that connects the suction pipe portion and the dust container without extending to the left or right from a tangent line that contacts the circumference of the suction pipe portion and the circumference of the dust container.

(iv) One side of the outlet corresponding to the central sidewall faces one side of the outlet corresponding to the peripheral sidewall, and in the left-right direction, the central sidewall and the corresponding side of the outlet may both be tangent to the circumference of the suction pipe section that is farther from the side of the outlet corresponding to the peripheral sidewall and be located on the same side as the peripheral sidewall with respect to a line passing through the central axis of the dust collecting container.
In this way, the side of the flow path connecting the suction pipe section and the dust collecting container that faces the peripheral side wall can be made to contact the circumference of the suction pipe section that is farther from the peripheral side wall and not to protrude to the left or right from a line passing through the central axis of the dust collecting container.

(v) The suction pipe section may have a narrow section in which the distance from the axis is smaller on the side closer to the outlet port on the rear end side in at least a part of the circumference of the suction port.
In this way, the suction pipe is narrowed near the outlet and the flow rate increases, so that the cyclone effect can be fully obtained, in which the air flows into the dust collection container through the outlet and along the inner circumference, separating dust by centrifugal separation.

(vi) The suction pipe section may have a raised portion in front of the outlet, the inner wall being raised on a side closer to the outlet.
In this way, the airflow is first directed toward the axis in front of the outlet and then flows out from the outlet in the side wall into the dust collection container, thereby obtaining a smooth airflow.

Preferred aspects of the present invention include any combination of the above-mentioned aspects.
In addition to the above-mentioned embodiment, various modifications of the present invention are possible. These modifications should not be interpreted as not falling within the scope of the present invention. The present invention should include all modifications within the scope of the claims and the equivalent meanings.

1: Cordless electric vacuum cleaner 10: Vacuum cleaner main body 20: Drive unit, 21: Housing, 21a: Electric blower storage section, 21aa: Exhaust port, 21ab: Inlet port, 21b: Suction pipe section, 21ba: Intake port, 21bb: Outlet port, 21bc: Narrow section, 21bd: Outlet port front protuberance, 21c: Handle section, 21d: Operation switch section, 21f: Battery mounting section, 21h: Holder section, 22: Electric blower, 23: Control circuit board 30: Dust collection device, 31: Dust collection container, 31a: Introduction section, 31aa: Peripheral side wall, 31ab: Center side wall, 32: Filter section, 32a: Cup section, 32b: Mesh-shaped inner cylinder section, 32c: Filter body 40: Battery 50: Suction port body 60: Extension pipe

Claims (7)

a suction pipe portion having a suction port that opens at a front end with an axis extending in a front-rear direction and an outlet port in a side wall at a rear end portion through which an airflow sucked in from the suction port flows out;
a cyclone-type dust collecting container having a generally cylindrical shape with a bottom, the cyclone-type dust collecting container being detachably attached below the suction pipe section such that the axis of the suction pipe section and the central axis of the cyclone-type dust collecting container overlap in a vertical direction perpendicular to the front-rear direction;
an electric blower that sucks air inside the attached dust collecting container and generates an airflow along the periphery of the dust collecting container;
the dust collection container has a base end that is continuous with the peripheral portion without any step, a peripheral side wall that extends linearly from the peripheral portion, and a central side wall that faces the peripheral side wall, and is provided with an introduction portion whose tip opening is connected to the outlet port when the introduction portion is attached to the suction pipe portion from below toward above ,
When viewed from the front in an attached state, the introduction portion has a peripheral side wall that is inclined vertically and a tip that is substantially perpendicular to the peripheral side wall,
The outlet port opens in an oblique direction corresponding to a tip opening of the introduction part and is airtightly connected to the introduction part . When the dust collection container is attached to the suction pipe section, at least a part of the tip of the introduction section protrudes into the inside of the suction pipe section,
2. The vacuum cleaner according to claim 1, wherein the suction pipe portion has an outlet front raised portion protruding from the inner wall on the forward side of the tip of the introduction portion protruding inward, and a rear end of the outlet front raised portion contacts the forward portion of the tip of the introduction portion protruding inward. The vacuum cleaner according to claim 1, wherein the peripheral side wall of the attached dust collection container is inclined so that the distance from the central axis in the left-right direction perpendicular to both the front-rear direction and the up-down direction decreases as the peripheral side wall approaches the upper end opening. The outlet is rectangular,
2. The vacuum cleaner according to claim 1, wherein in a left-right direction perpendicular to both the front-rear direction and the up-down direction, the peripheral side wall and one side of the outlet corresponding thereto are both located in an area sandwiched between a left tangent that contacts the circumference of the suction pipe section and the circumference of the dust collection container from the left side and a right tangent that contacts the circumference of the dust collection container from the right side. 5. The vacuum cleaner according to claim 4, wherein one side of the outlet corresponding to the central sidewall faces one side of the outlet corresponding to the peripheral sidewall, and in the left-right direction, the central sidewall and the corresponding side of the outlet are both tangent to the circumference of the suction pipe section farther from the side of the outlet corresponding to the peripheral sidewall and are located on the same side as the peripheral sidewall with respect to a line passing through the central axis of the dust collection container. The vacuum cleaner according to claim 1, wherein the suction pipe section has a narrow section at least in part of the circumference of the suction port, the section closer to the outlet port at the rear end being closer to the axis. The electric vacuum cleaner according to claim 6 , wherein the suction pipe portion has a raised portion in front of the outlet, the raised portion being formed on an inner wall closer to the outlet.