CN108697284A - Electric dust collector - Google Patents

Abstract

To provide an electric vacuum cleaner capable of efficiently utilizing exhaust air from an electric fan when used as a blower. The exhaust air passage (37) is arranged on the main body (21), and communicates with the exhaust side of the electric blower and the exhaust port. The connecting port (34) is provided on the main body (21). The blower air passage (38) is arranged on the main body (21), and communicates with the exhaust side of the electric blower and the connection port (34). The switching valve (39) is set to be able to open and close the connecting port (34), and the exhaust air path (37) and the blower air path (38) are switched by opening and closing. The accessory (17) is installed on the connecting port (34), and is communicated with the blower air passage (38) by switching of the switching valve (39).

Description

electric vacuum cleaner

technical field

An embodiment of the present invention relates to an electric vacuum cleaner that can be used as a blower, and when used as a blower, exhaust gas from the electric blower can be utilized by attaching an accessory.

Background technique

Conventionally, for example, among electric vacuum cleaners used as suction vacuum cleaners, some electric vacuum cleaners can be used as blowers by connecting a suction hose or the like through a connection port provided to the exhaust air path of the electric fan. In such a configuration, it is desired to efficiently blow off dust by efficiently utilizing the exhaust gas of the electric blower.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2011-250972

Contents of the invention

The problem to be solved by the invention

The present invention has been made in view of the above points, and an object of the present invention is to provide an electric vacuum cleaner that can efficiently utilize exhaust gas from an electric fan when used as a blower.

means to solve the problem

An electric vacuum cleaner according to an embodiment has a main body, a dust collection unit, an exhaust port, an exhaust air duct, a connection port, a blower air duct, a switching mechanism, and accessories. The main body is equipped with an electric fan. The dust collection unit communicates with the suction side of the electric fan, and collects dust by the operation of the electric fan. The exhaust port is arranged on the main body. The exhaust air passage is arranged on the main body, and communicates with the exhaust side of the electric blower and the exhaust port. The connection port is arranged on the main body. The blower air passage is arranged on the main body, and connects the exhaust side of the electric fan with the connection port. The switching mechanism is configured to be able to open and close the connection port, and the exhaust air path and the blower air path are switched by the opening and closing. The accessories are installed on the connecting port, and communicate with the air passage of the blower through the switching of the switching mechanism.

Description of drawings

1( a ) is a partial cross-sectional view showing a state where the vacuum cleaner according to one embodiment is not attached, and FIG. 1( b ) is a partial cross-sectional view showing a state where the vacuum cleaner attachment is attached.

Fig. 2 is a cross-sectional view showing the suction use state of the electric vacuum cleaner.

Fig. 3 is a perspective view showing the vicinity of a connection port of the main body of the electric vacuum cleaner.

Fig. 4 is a perspective view showing part of the interior of the main body.

Fig. 5 is a perspective view showing a suction use state of the electric vacuum cleaner.

Fig. 6 is a perspective view showing another suction use state of the electric vacuum cleaner.

Fig. 7 is a cross-sectional view showing the blowing use state of the electric vacuum cleaner.

Fig. 8 is a perspective view showing an accessory of the electric vacuum cleaner.

Fig. 9 is a cross-sectional view showing a part of the process of attaching the attachment of the electric vacuum cleaner.

Fig. 10 is a perspective view showing one blowing use state of the electric vacuum cleaner.

Fig. 11 is a perspective view showing another blowing use state of the electric vacuum cleaner.

Detailed ways

Hereinafter, a configuration of an embodiment will be described with reference to FIGS. 1 to 11 .

In FIG. 5 , 11 denotes an electric vacuum cleaner, and this electric vacuum cleaner 11 includes a vacuum cleaner main body 15 . In addition, as shown in FIG. 6 , this electric vacuum cleaner 11 may include an elongated air passage body 16 connected to the vacuum cleaner main body 15 . Furthermore, as shown in FIG. 10 , this electric vacuum cleaner 11 includes an attachment 17 attached to the vacuum cleaner main body 15 . In addition, the electric vacuum cleaner 11 is used as a hand-held (portable) cordless suction electric vacuum cleaner in a suction use state ( FIG. 5 ), where only the vacuum cleaner main body 15 is used. In addition, when this electric vacuum cleaner 11 is equipped with the air passage body 16, as another suction use state (FIG. 6) in which the air passage body 16 is connected to the cleaner main body 15, it can also be set as a stick type cordless suction electric vacuum cleaner. And, this electric vacuum cleaner 11 is used as a hand-held cordless blower in one blowing use state ( FIG. 10 ) or another blowing use state ( FIG. 11 ). The use state of the blower is the specified blowing use state. In addition, this electric vacuum cleaner 11 may constitute an electric vacuum cleaner together with an unillustrated storage device for storing when not in use.

The cleaner main body 15 shown in FIGS. 1 to 6 includes a main body portion 21 . Moreover, this cleaner main body 15 is equipped with the dust collection part (dust collection device) 22 which can be attached to the main body part 21, and is detachable. And this cleaner main body 15 is equipped with the electric blower 23. Moreover, this cleaner main body 15 is equipped with the control part 24 which is a control means (controller) which controls the operation|movement of the electric blower 23. As shown in FIG. And this cleaner main body 15 is equipped with the secondary battery 25 which is a battery as a power supply part used as the power supply of the electric blower 23, the control part 24, etc. FIG. Moreover, this cleaner main body 15 is provided with the main body connection port 26 to which the air duct body 16 can be connected. And this vacuum cleaner main body 15 is provided with the handle (grip part) 27 which is a main body holding part as a human body contact part for holding this vacuum cleaner main body 15 (electric vacuum cleaner 11). Moreover, this cleaner main body 15 is equipped with the setting button 28 which is a setting means (setting part) which sets the operation mode of the electric blower 23. As shown in FIG. Moreover, this cleaner main body 15 is provided with the 1st communication port 31 and the 2nd communication port 32 which communicate with the dust collecting part 22, respectively. And this vacuum cleaner main body 15 is equipped with the exhaust port 33 which discharges the exhaust gas of the electric fan 23. Moreover, this cleaner main body 15 is equipped with the connection port 34 which can attach and detach the attachment 17 (FIG. 8). And, the suction air path 35 which connects the main body connection port 26 and the 1st communication port 31 is formed in the inside of this vacuum cleaner main body 15. As shown in FIG. Moreover, the communication air path 36 which communicates the 2nd communication port 32 and the suction side of the electric fan 23 is formed in the inside of this vacuum cleaner main body 15. As shown in FIG. In addition, an exhaust air passage 37 that communicates the exhaust side of the electric fan 23 with the exhaust port 33 is formed inside the cleaner main body 15 . Moreover, the blower air path 38 which connects the exhaust side of the electric blower 23 and the connection port 34 is formed in the inside of this vacuum cleaner main body 15. As shown in FIG. And this cleaner main body 15 is equipped with the switching valve 39 which is the switching mechanism (switching part) which can open and close the connection port 34, ie, the switching mechanism (opening and closing part) of a switch. And this cleaner main body 15 is equipped with the locking part (locking clip) 40 which is a fixing mechanism (fixing part) which fixes the switching valve 39 at the position which closes the connection port 34. As shown in FIG.

In addition, regarding the electric vacuum cleaner 11, in order to clarify the description, the direction substantially parallel to the axis line of the main body connection port 26 is hereinafter referred to as the front-rear direction, and the up-down direction and the left-right direction are defined based on the front-rear direction. That is, the up-down direction, left-right direction, and front-rear direction of the electric vacuum cleaner 11 are respectively based on the state shown in FIG. 2 and FIG. is the front-back direction, and the arrow L direction and the arrow R direction are defined as the left-right direction.

The main body part 21 shown in FIGS. 1 to 6 is formed in an elongated front and rear as a whole. An electric blower 23 , a control unit 24 , and a secondary battery 25 are respectively housed in the main body portion 21 . In addition, a main body connection port 26 is opened in the main body part 21 . Furthermore, a handle 27 is protrudingly provided on the main body portion 21 . In addition, a first communication port 31 and a second communication port 32 are opened in the main body portion 21 . Furthermore, an exhaust port 33 is opened in the main body portion 21 . In addition, a connection port 34 is opened in the main body portion 21 . Furthermore, a suction air passage 35 is disposed on the main body portion 21 . In addition, a communication air passage 36 is disposed on the main body portion 21 . Moreover, the blower air duct 38 is arrange|positioned in this main-body part 21. As shown in FIG. Furthermore, a switching valve 39 is attached to the main body portion 21 . And this main body part 21 has the first main body part 42 that is located at the front part and extends along the front-rear direction, the second main body part 43 that is located at the rear part and extends along the front-rear direction, and the first main body part 42 and the second main body part The inclined main body part 44 of the connecting main body part 43 is connected. Moreover, the attachment holding part 45 which attaches and holds the dust collecting part 22 is provided in this main body part 21. As shown in FIG.

The first main body portion 42 is formed in a substantially linear shape along the front-rear direction. The second main body portion 43 is located below the first main body portion 42 . In addition, the second main body portion 43 is formed in a linear shape along the front-rear direction. Therefore, the second body portion 43 is formed approximately parallel to the first body portion 42 . Furthermore, the inclined main body portion 44 is formed along a straight line inclined from the upper front side to the lower rear side. Therefore, the main body portion 21 is curved and formed in a substantially crank shape.

The attaching and holding portion 45 protrudes upward from the upper portion of the first body portion 42 , that is, a continuous position between the first body portion 42 and the inclined body portion 44 .

The dust collecting part 22 communicates with the suction side of the electric fan 23, and collects the dust sucked by the operation of the electric fan 23. The dust collecting unit 22 is a cyclone-type dust collecting hood that centrifugally separates (cyclones) dust sucked together with the air by, for example, the operation of the electric fan 23 from the air. In addition, the dust collecting part 22 includes a dust collecting locking part 47 for locking the dust collecting part 22 to the main body part 21 . This dust collection locking part 47 is provided, for example, at the end part of the dust collection part 22 in this embodiment, but may be provided at the main-body part 21 side. In the present embodiment, the dust collection locking portion 47 is locked and held on the attachment holding portion 45 . Furthermore, this dust collection part 22 is equipped with the dust collection suction port 48 and the dust collection exhaust port 49. As shown in FIG. The dust collection suction port 48 and the dust collection exhaust port 49 communicate with the first communication port 31 and the second communication port 32 in a state where the dust collection unit 22 is attached to the main body 21 . Therefore, this dust collecting part 22 communicates with the suction side of the electric fan 23 in the state attached to the main body part 21 . Moreover, this dust collection part 22 is connected to the downstream side of the main body connection port 26 (air duct body 16) in the state attached to the main body part 21.

The electric fan 23 includes a motor and a fan rotated by the motor. As the motor, for example, a brushless motor is used. In addition, the electric fan 23 is housed in the inclined main body portion 44 .

The control unit 24 is, for example, a control board provided with a microcomputer or the like. The control unit 24 includes, for example, a drive control unit that operates the electric blower 23 and the like in accordance with settings made by the user using the setting button 28 . The control unit 24 may include a charging circuit unit such as a constant current circuit that receives power from an external power source such as a commercial AC power source to charge the secondary battery 25 .

The secondary battery 25 is, for example, a battery pack including a plurality of batteries.

The main body connection port 26 is an air intake port when the electric vacuum cleaner 11 is used as a handheld. Moreover, this main body connection port 26 is a communication port which connects the air passage body 16 and the vacuum cleaner main body 15 when the electric vacuum cleaner 11 is used as a stick type. The main body connection port 26 is located at the front end of the main body part 21 . That is, this main body connection port 26 is provided in the front part of the cleaner main body 15. As shown in FIG. For example, the body connection port 26 opens at the front end of the first body portion 42 . Therefore, the main body connection port 26 is located on the front lower side of the dust collecting part 22 .

The handle 27 is located on the upper part of the cleaner main body 15 (main body part 21). In addition, a setting button 28 is disposed on the upper portion of the handle 27 .

The setting button 28 is located on the front side of the handle 27, for example. In addition, the setting button 28 can be pressed by the thumb or the like of the hand of the user holding the handle 27 .

The first communication port 31 is located on the upper portion of the first main body portion 42 . Likewise, the second communication port 32 is located on the upper portion of the first main body portion 42 . Therefore, these 1st communication port 31 and the 2nd communication port 32 are located in the upper part of the cleaner main body 15 (main body part 21). Moreover, these 1st communication port 31 and the 2nd communication port 32 are opened in the direction which intersects with the longitudinal direction of the cleaner main body 15 (main body part 21). In addition, these first communication ports 31 and second communication ports 32 are arranged in front and back. Furthermore, these first communication ports 31 and second communication ports 32 communicate with each other through the dust collection part 22 in a state where the dust collection part 22 is attached to the main body part 21 . In addition, the second communication port 32 may be covered with a filter 51 .

The exhaust port 33 is a portion serving as the downstream end of the exhaust air path 37 . The exhaust port 33 is located on both sides of the first main body portion 42 . Therefore, this exhaust port 33 is located in the front side of the cleaner main body 15 (main body part 21). In other words, the exhaust port 33 is located in front of the electric fan 23 . Therefore, the exhaust port 33 is located in the vicinity of the main body connection port 26 . Furthermore, the exhaust port 33 is located above the connection port 34 . In addition, this exhaust port 33 may be covered with the filter which is not shown in figure.

The connection port 34 is a mounted portion of the detachable attachment 17 . In addition, this connection port 34 is a part which becomes the downstream end of the blower air path 38 . The connection port 34 is located at the lower portion of the first main body portion 42 . Therefore, this connection port 34 is located in the front side of the cleaner main body 15 (main body part 21). In other words, the connection port 34 is arranged in front of the electric fan 23 . In addition, the connection port 34 is located below the exhaust port 33 . For example, the connection port 34 is located between the exhaust ports 33 on both sides. In addition, the connection port 34 is opened at the lower portion (bottom) of the main body portion 21 . Furthermore, the connection port 34 is formed, for example, in an elongated oval (ellipse) shape along the front-rear direction in this embodiment ( FIG. 3 ). In addition, the connection port 34 is located behind the main body connection port 26 . Furthermore, the connection port 34 is located behind the suction air path 35 . In addition, this connection port 34 is located below the dust collecting part 22 . Furthermore, this connection port 34 is located between the 1st communication port 31 and the 2nd communication port 32, seeing along the longitudinal direction (front-rear direction) of the cleaner main body 15 (main body part 21). In addition, a locking receiving portion 53 for locking the switching valve 39 via the locking portion 40 is provided on the inner edge of the connection port 34 . In addition, an unillustrated accessory locking receiving portion for locking the attached accessory 17 is provided on the inner edge of the connection port 34 .

The lock receiving part 53 is provided in the rear part of the inner edge of the connection port 34 in this embodiment. The locking receiving portion 53 protrudes in a claw shape toward the inside of the connection port 34 . That is, in the present embodiment, the lock receiving portion 53 protrudes forward in a claw shape.

The suction air path 35 is formed along the front-rear direction. The suction air passage 35 is located inside the first main body portion 42 . Therefore, this suction air path 35 is located in front of the motor blower 23 separately. In addition, the suction air passage 35 is located in front of the connection port 34 . Therefore, the connection port 34 is located between the suction air passage 35 and the electric fan 23 . In addition, the downstream side of the suction air passage 35 is curved toward the first communication port 31 , that is, upward.

The communication air passage 36 is located above the electric fan 23 and is formed in the vertical direction.

The exhaust air passage 37 and the blower air passage 38 may be mutually independent air passages, or may be constituted by a part of common air passages. In the present embodiment, the upstream side of the exhaust air passage 37 and the blower air passage 38 is a common air passage 55 . That is, in this embodiment, electric vacuum cleaner 11 is provided with air duct 55 which is provided in main body part 21 and communicates with the exhaust side of electric fan 23 . Further, the air passage 55 is configured to alternately (selectively) switch between the exhaust air passage 37 and the blower air passage 38 as the switching valve 39 opens and closes the connection port 34 . The upstream side of the wind passage 55 is located at the rear of the electric fan 23 , and the downstream side is located in front of the electric fan 23 . That is, air passage 55 (upstream side of exhaust air passage 37 and blower air passage 38 ) is formed from the rear of electric fan 23 to the front of electric fan 23 . Therefore, a part of the exhaust air duct 37 is located in front of the electric fan 23 . Similarly, a part of blower air duct 38 is located in front of electric fan 23 . In addition, the air passage 55 has a switching port 56 opened and closed by the switching valve 39 at the downstream end. Furthermore, in this embodiment, at least the downstream side of the air passage 55 is divided by the duct 57 .

The switching port 56 communicates the air passage 55 with the exhaust port 33 . That is, this switching port 56 constitutes a part of the exhaust air passage 37 . In addition, the switch port 56 is located above the connection port 34 . That is, the switch port 56 and the connection port 34 are arranged vertically. Therefore, this switching port 56 is located in front of the electric fan 23 . In addition, this switching port 56 is located between the suction air path 35 and the electric fan 23 . And, this switching port 56 is located in the vicinity of the connection port 34 .

The duct 57 is located in front of the electric fan 23 . In addition, the conduit 57 is located above the connection port 34 . Further, the duct 57 has an opposing surface 59 as an opposing portion along a direction intersecting (orthogonal) to the flow direction of the air passing through the air passage 55 at a position at the downstream end of the air passage 55 . In addition, a switching port 56 is opened in the conduit 57 .

The opposing surface 59 is located above the connection port 34 . Therefore, the opposing surface 59 is positioned to face the upper portion of the switching valve 39 . In addition, the facing surface 59 is formed to incline upward toward the rear. Furthermore, the switching port 56 is opened in this opposing surface 59 (FIG. 4). In the present embodiment, the switching port 56 is provided to penetrate the facing surface 59 in the thickness direction. Therefore, the switching port 56 is located at the front end portion of the duct 57 .

The switching valve 39 alternately (selectively) switches between the exhaust air passage 37 and the blower air passage 38 by opening and closing the connection port 34 . In the present embodiment, the switching valve 39 alternately (selectively) switches between the exhaust air passage 37 and the blower air passage 38 by closing one of the connection port 34 and the switching port 56 . That is, the switching valve 39 is configured to allow the exhaust gas from the electric fan 23 to flow to the exhaust air passage 37 by opening the switching port 56 in a state where the connection port 34 is closed, and to switch the switching valve by closing the connection port 34 in a state where the connection port 34 is opened. The port 56 allows the exhaust gas from the electric fan 23 to flow to the blower air path 38 . Therefore, the switching valve 39 is configured to switch the exhaust air passage 37 and the blower air passage 38 substantially completely. In other words, the exhaust from the electric fan 23 flows only to the side switched by the switching valve 39 among the exhaust air passage 37 and the blower air passage 38 , and the exhaust from the electric fan 23 does not flow to the remaining side. That is, in the present embodiment, switching the exhaust air passage 37 and the blower air passage 38 refers to a state in which only one of them is opened and the other is substantially blocked.

In addition, this switching valve 39 is a valve body provided with a rotating shaft 39 a on the front end side, which is the downstream side of the exhaust gas from the electric fan 23 . That is, the switching valve 39 is configured to open and close the connection port 34 and the switching port 56 by rotation. The rotation shaft 39 a is arranged, for example, at the lower portion on the front side of the switching port 56 on the guide tube 57 . Therefore, the switching valve 39 is arranged to rotate in the up-down (front-back) direction. In other words, the switching valve 39 opens the connection port 34 and closes the switching port 56 by rotating toward the downstream side around the downstream side of the exhaust gas of the electric fan 23 . In addition, the switching valve 39 includes a connection port closing portion 61 capable of closing the connection port 34 . Further, the switching valve 39 includes a contact surface 62 as a contact portion with which the attachment 17 attached to the connection port 34 comes into contact. Furthermore, this switching valve 39 is equipped with the switching port sealing part 63 which can close the switching port 56 in this embodiment. In addition, the switching valve 39 includes a sealing member 64 . Furthermore, the switching valve 39 has an insertion port 65 for actuating the locking portion 40 . In addition, this switching valve 39 is provided with the space part 66 which is a fixing mechanism arrangement|positioning part (fixing part arrangement|positioning part) in which the locking part 40 is arrange|positioned in this embodiment. And, this switching valve 39 is biased by a spring 67 as a switching urging mechanism (switching urging body).

The connection port closing portion 61 is a portion that serves as a cover for the connection port 34 . That is, the connection port closing portion 61 is a portion that is fitted and exposed to the connection port 34 in a state where the switching valve 39 closes the connection port 34 . The connection port closing portion 61 constitutes a lower portion of the switching valve 39 . That is, the connection port closing portion 61 is located below the switching port closing portion 63 . In addition, the connection port closing portion 61 is formed in a quadrangular plate shape, for example.

The contact surface 62 is located on the front side of the lower portion of the switching valve 39 . For example, the contact surface 62 is provided on the connection port closing portion 61 . In addition, the contact surface 62 is disposed on the downstream side of the switching valve 39 of the exhaust gas from the electric fan 23 , that is, on the front end side. In other words, this contact surface 62 is located in the vicinity of the rotation shaft 39 a of the switching valve 39 . Furthermore, this contact surface 62 is inclined upward toward the front side. Therefore, the contact surface 62 is formed in the radial direction of the rotation shaft 39 a of the switching valve 39 .

The switching port closing portion 63 is a portion that serves as a cover for the switching port 56 . The switching port closing portion 63 is a portion that fits into the switching port 56 when the switching valve 39 closes the switching port 56 . The switching port closing portion 63 constitutes an upper portion of the switching valve 39 .

In addition, the switching port closing part 63 is included in the switching valve 39 integrally with the connection port closing part 61 in this embodiment, but is independent of the opening and closing mechanism (opening and closing body) of the switching valve 39 and the opening and closing of the switching valve 39. When opening and closing the switching port 56 in conjunction with each other, it may be provided in the opening and closing mechanism, or may be configured independently of the switching valve 39 . In addition, when switching the exhaust air path 37 and the blower air path 38 provided mutually independently by a switching mechanism (switching part), this switching opening sealing part 63 may become unnecessary.

The sealing member 64 closes the gap between the switching valve 39 and the connection port 34 . In the present embodiment, the sealing member 64 closes the gap between the switching valve 39 and the connection port 34 and the switching port 56 . This sealing member 64 is attached so as to surround the outer edge of the switching valve 39 .

An insertion port 65 is opened in the connection port closing portion 61 . That is, the insertion port 65 is located below the switching valve 39 and exposed from the connection port 34 . The insertion port 65 is arranged on the rear side of the switching valve 39 . That is, the insertion port 65 is located on the upstream side of the exhaust gas of the electric fan 23 with respect to the rotation shaft 39 a of the switching valve 39 . In the present embodiment, the insertion port 65 is separated from the contact surface 62 at the rear.

The space portion 66 is provided above the lower surface of the switching valve 39 . In this embodiment, the space portion 66 is provided between the connection port sealing portion 61 and the switching port sealing portion 63 . The space portion 66 is arranged near the outer edge of the switching valve 39 . That is, the space portion 66 is disposed on the inner edge of the connection port 34 , at a position facing the lock receiving portion 53 in the present embodiment. In addition, the space portion 66 is formed by being recessed in a direction away from the inner edge of the connection port 34 . In the present embodiment, the space portion 66 is arranged at a rear portion of the switching valve 39 . Therefore, the space portion 66 is formed to expand in the front-rear direction. Furthermore, this space portion 66 communicates with the insertion port 65 . In addition, the space portion 66 is provided with a guide portion 66 a that guides the locking portion 40 in a direction of contacting and separating from the locking receiving portion 53 . In this embodiment, this guide part 66a is bent so that it may protrude gradually upward from a rear part toward a front part, for example.

The spring 67 biases the switching valve 39 in the closing direction of the connection port 34 . In the present embodiment, the spring 67 biases the switching valve 39 in the opening direction of the switching port 56 . That is, the spring 67 urges the switching valve 39 in a direction to rotate downward. As the spring 67, for example, a torsion spring is used in this embodiment.

In addition, the locking part 40 is provided on any one of the main body part 21 and the switching valve 39 , and locks and fixes the switching valve 39 to the main body part 21 . In the present embodiment, the locking portion 40 is provided on the switching valve 39 . Specifically, the locking portion 40 is arranged in the space portion 66 to face the insertion port 65 . In addition, the locking portion 40 is arranged movably with respect to the switching valve 39 . Further, the locking portion 40 includes a pressed portion 40 a as a fixing mechanism main body (fixing portion main body). In addition, the locking portion 40 includes a locking claw portion 40 b that is locked and fixed to the locking receiving portion 53 . Furthermore, the locking portion 40 includes a guided portion 40c guided by the guide portion 66a. In addition, the locking portion 40 is biased by a spring 69 as a biasing mechanism (biasing body). In addition, the locking portion 40 is configured to maintain a state of being locked to the locking receiving portion 53 by the biasing force of the spring 69 in the non-attached state of the attachment 17 of the connection port 34 to fix the switching valve 39, and the switching valve 39 is fixed to the switching valve 39 by the attachment 17. The attachment of the connection port 34 operates against the urging force of the spring 69 , thereby disengaging from the locking of the locking receiving portion 53 , and releasing the fixing of the switching valve 39 .

The pressed portion 40 a is a portion that presses the attachment 17 attached to the connection port 34 to actuate the locking portion 40 . The pressed portion 40 a is arranged at a lower portion facing the insertion port 65 .

The locking claw portion 40 b is a portion that engages and separates from the locking receiving portion 53 . The locking claw portion 40b is protrudingly provided in a claw shape at a rear portion facing the locking receiving portion 53 .

The guided portion 40 c is a portion that sets the direction in which the locking portion 40 operates when the pressed portion 40 a is pressed by the accessory 17 attached to the connection port 34 together with the guide portion 66 a. The guided portion 40c is provided on the rear side of the lower portion facing the guide portion 66a.

The spring 69 biases the locking portion 40 toward the switching valve 39 (connection port closing portion 61 (insertion port 65 )). That is, the spring 69 biases the locking portion 40 downward. In this embodiment, a coil spring is used as the spring 69 . In addition, the lower end of the spring 69 is held on the upper portion of the locking portion 40 , and the upper end is held on the lower portion of the switching port closing portion 63 of the switching valve 39 , and is located between the locking portion 40 and the switching valve 39 .

On the other hand, the air passage body 16 divides the air passage inside, and communicates with the suction side of the electric fan 23 in the state connected to the vacuum cleaner main body 15 . The air passage body 16 includes a long extension pipe 71 . In addition, this air duct body 16 may be equipped with the suction port body on the front-end|tip side (upstream side). Arbitrary members can be used as this suction port body, and in this embodiment, the floor brush 72 which is a suction port body is used, for example. In addition, the air passage body 16 is not an essential structure.

The base end side of the extension pipe 71 is connected to the cleaner main body 15 and is connected to the dust collecting part 22 in an airtight manner. For example, the base end side of the extension tube 71 is connected to the main body 26 . Moreover, this extension pipe 71 is hold|maintained detachably by the fastener 74 provided in the cleaner main body 15 (main body part 21).

The floor brush 72 includes a housing 76 . Moreover, this floor brush 72 is equipped with the connection pipe 77. As shown in FIG. The casing 76 is formed in an elongated shape along the horizontally long direction, that is, the left-right direction. In addition, a suction port (not shown) is opened in a lower portion of the casing 76 facing the surface to be cleaned. In addition, the connecting pipe 77 is rotatably connected to the housing 76 . Furthermore, the connection pipe 77 communicates with the suction port, and is airtightly connected to the front end side of the extension pipe 71 . And this floor brush 72 is connected to the front-end side of the extension pipe 71. As shown in FIG. For example, the connection pipe 77 of the floor brush 72 is inserted and connected to the extension pipe 71 . In addition, the floor brush 72 is kept connected to the extension pipe 71 by the floor brush fastener 79 provided on the extension pipe 71 .

In addition, attachment 17 is an attachment for a blower that uses exhaust from electric blower 23 when electric vacuum cleaner 11 is used as a blower. As shown in FIGS. 7 and 8 , the attachment 17 is formed in a substantially cylindrical shape. That is, the attachment 17 includes an exhaust communication port 81 on the base end side and an exhaust port 82 on the front end side. In addition, this accessory 17 includes an accessory attachment portion 85 that is inserted into and removed from the connection port 34 . Furthermore, this attachment 17 includes a release portion 86 capable of releasing the fixation of the switching valve 39 by the locking portion 40 . In addition, the attachment 17 includes an attachment lock portion 87 that locks the attachment 17 to the connection port 34 . Further, the attachment 17 includes an operated portion 88 for actuating the attachment locking portion 87 . Furthermore, this attachment 17 is configured to release the fixation of the switching valve 39 by the locking portion 40 by being attached to the connection port 34, thereby opening the connection port 34, and operating the switching valve 39 so as to switch from the exhaust air path 37 to the blower air path. 38. That is, the attachment 17 can be attached to and detached from the connection port 34 opened by the switching valve 39 .

The exhaust communication port 81 is an opening that communicates with the blower air passage 38 in a state where the attachment 17 is attached to the connection port 34 . The exhaust communication port 81 opens upward, for example.

The discharge port 82 communicates with the exhaust communication port 81 and is an opening for discharging the air introduced into the attachment 17 from the exhaust communication port 81 . The discharge port 82 opens in the front-rear direction. In addition, the discharge port 82 is formed to be wider in the vertical direction and narrower in the left-right direction (width direction). That is, the discharge port 82 is formed in an oblong (elliptical) shape having a longitudinal direction in the vertical direction. Furthermore, the opening area of the discharge port 82 is set narrower than that of the main body connection port 26 . In addition, the discharge port 82 is set to have a narrower opening area than the exhaust communication port 81 . Therefore, the attachment 17 is formed such that the air passage area gradually becomes narrower from the upstream side to the downstream side. Furthermore, the discharge port 82 is located below (directly below) and forward of the main body connection port 26 in a state where the attachment 17 is attached to the connection port 34 . That is, the discharge port 82 is located near the main body connection port 26 .

The accessory mounting portion 85 surrounds the exhaust communication port 81 and protrudes upward in a rib shape. That is, the accessory mounting portion 85 is located on the proximal end side (rear end side) of the accessory 17 . In addition, this accessory attachment portion 85 is shaped to fit into the connection port 34 . That is, the attachment attaching portion 85 has an oblong (ellipse) shape that is long in the front-rear direction (the axial direction of the attachment 17 ). In addition, this accessory attachment portion 85 has, for example, ribs 85a for reinforcement along the front-rear direction. The rib 85 a is provided across the front and rear of the exhaust communication port 81 at the central portion along the left-right direction of the exhaust communication port 81 .

The release part 86 releases the locking and fixing of the switching valve 39 by the locking part 40 by attaching the attachment 17 to the connection port 34 . Specifically, the release portion 86 is inserted into the insertion port 65 by attaching the attachment 17 to the connection port 34 , and presses the locking portion 40 (pressed portion 40 a ) against the urging force of the spring 69 . The release portion 86 is, for example, a protrusion protruding upward. The release portion 86 is disposed on the accessory mounting portion 85 . More specifically, the release portion 86 is protrudingly provided on the rib 85a.

The accessory locking part 87 is a part that locks and fixes the accessory 17 to the cleaner main body 15 (connection port 34 ) by being inserted and locked into the accessory locking receiving part located at the inner edge of the connection port 34 . The accessory locking portions 87 are respectively provided in the shape of claws on the left and right of the accessory mounting portion 85 . In addition, the accessory locking portion 87 is provided so as to be able to advance and retreat in a direction intersecting (orthogonal to) the attachment direction of the attachment 17 to the connection port 34 (the insertion direction of the accessory attachment portion 85 to the connection port 34 ). Furthermore, the attachment locking portion 87 is biased toward the entry direction by a spring as an attachment urging mechanism (attachment urging body) not shown in the figure.

The operated portion 88 retracts the accessory locking portion 87 against the urging force of the spring by the user's operation. The operated portion 88 is provided corresponding to the attachment locking portion 87 . That is, the operated portions 88 are respectively provided on the left and right sides of the attachment 17 . Therefore, these operated parts 88 can operate the attachment locking part 87 when the user sandwiches them from left and right. In addition, the operated portion 88 is located below and separated from the accessory mounting portion 85 (accessory locking portion 87 ).

Next, the operation of the above-mentioned one embodiment will be described.

When electric vacuum cleaner 11 is used as a hand-held suction vacuum cleaner (one suction use state ( FIG. 5 )), only vacuum cleaner main body 15 in which dust collecting portion 22 is attached to main body portion 21 is used. That is, it is used in the state which removed the air passage body 16 from the cleaner main body 15. FIG. In this case, for example, an air passage body shorter than the air passage body 16 such as a spout pipe other than the air passage body 16 including the extension pipe 71 and the floor brush 72 may be connected to the main body connection port 26 . In this state, as shown in FIG. 1(a), the connection port 34 is covered by the switching valve 39 (connection port closing portion 61), and the sealing member 64 is pressed against the inner edge of the connection port 34, so that the connection port 34 The exhaust air path 37 is selected to be closed seamlessly. The switching valve 39 locks the locking claw portion 40 b of the locking portion 40 to the locking receiving portion 53 to maintain a state in which the connection port 34 is closed.

In addition, in the electric vacuum cleaner 11, the user who holds the handle 27 operates the setting button 28 so that the control part 24 drives the electric fan 23 in a set action, and makes the main body connection port 26 facing the surface to be cleaned or connected to the main body. The air passage body 16 connected to the connecting port 26 moves on the surface to be cleaned along the front-back direction or the oblique direction, and at the same time utilizes the negative pressure generated by the drive of the electric fan 23 to suck the dust on the surface to be cleaned together with the air.

The dust-laden air is generally sucked from the main body connection port 26 to the dust collection part 22, and the dust is separated and collected from the air, and after the dust-separated air is sucked into the electric fan 23, it is exhausted from the air through the exhaust air duct 37. The port 33 discharges to the outside of the cleaner main body 15 . More specifically, dust-laden air is sucked into the dust collecting part 22 from the main body connecting port 26 through the suction air path 35, the first communication port 31 and the dust collecting suction port 48, and the dust is separated from the air in the dust collecting part 22. . The dust-separated air is discharged from the dust collection part 22 to the communication air passage 36 of the main body 21 through the dust collection exhaust port 49 and the second communication port 32, and is sucked into the electric fan 23 from the communication air passage 36 and the motor After the fan 23 is cooled, it is discharged from the exhaust port 33 to the outside of the cleaner main body 15 through the exhaust air passage 37 (switching port 56 ).

In addition, when electric vacuum cleaner 11 is used as a stick suction vacuum cleaner (another suction use state ( FIG. 6 )), air passage body 16 is connected to vacuum cleaner main body 15 in which dust collecting part 22 is attached to main body part 21 . In this state, the floor brush 72 communicates with the dust collecting part 22 (via the extension pipe 71, the main body connecting port 26 of the vacuum cleaner main body 15, the suction air path 35, the first communicating port 31 and the dust collecting suction port 48, and communicates with the dust collecting part 22 via the The dust collection exhaust port 49 of the dust collection part 22 , the second communication port 32 of the cleaner main body 15 and the communication air passage 36 ) communicate with the suction side of the electric fan 23 .

In addition, in the electric vacuum cleaner 11, the user holding the handle 27 places the floor brush 72 on the surface to be cleaned, and by operating the setting button 28 of the handle 27, the control unit 24 drives the electric fan 23 in a set operation, and Make the floor brush 72 advance alternately along the front-rear direction or oblique direction etc. on the surface to be cleaned, and use the negative pressure generated by the drive of the electric fan 23 to suck the dust on the surface to be cleaned together with the air from the suction port of the floor brush 72 when passing .

The inhaled dust-laden air is transported from the floor brush 72 to the main body 15 (main body 21 ) through the extension pipe 71 , and the dust is separated from the air and collected by the dust collecting unit 22 in the same manner as in the above-mentioned suction use state.

When the cleaning is completed, the user operates the setting button 28 to stop the electric fan 23 by the control unit 24 .

On the other hand, when electric vacuum cleaner 11 is used as a blower (one or other blowing use state ( FIG. 10 or FIG. 11 )), the user first attaches attachment 17 to cleaner main body 15 . At this time, the release part 86 of the attachment 17 releases the lock and fixation of the switching valve 39 to push the switching valve 39, and is locked and fixed to the connection port 34, so that the pushed switching valve 39 keeps the switch port 56 closed. state, the blower air path 38 is selected. More specifically, as shown in FIG. 9 , if the user aligns the accessory mounting portion 85 of the accessory 17 with the connection port 34 of the cleaner main body 15 and presses it into the connection port 34, the release portion 86 is inserted into the insertion port 65 first, The locking portion 40 accommodated in the space portion 66 is pushed up against the urging force of the spring 69 in the insertion opening 65 so as to face the pressed portion 40 a. At this time, with regard to the locking portion 40 , the guided portion 40 c moves forward in the space portion 66 by slidingly contacting the guide portion 66 a of the switching valve 39 , whereby the locking claw portion 40 b retreats forward with respect to the locking receiving portion 53 . And the locking and fixing of the switching valve 39 is released. By further pressing the attachment mounting portion 85 of the attachment 17 into the connection port 34 , the switching valve 39 is pushed up against the urging force of the spring 67 . In addition, the accessory locking portion 87 of the accessory 17 retracts against the biasing force of the spring by sliding contact with the inner edge of the connection port 34 , and is used at the position of the accessory locking receiving portion located on the inner edge of the connection port 34 . The biasing force of the spring resets and protrudes, whereby the accessory locking portion 87 is inserted and locked into the accessory locking receiving portion, and the accessory 17 is locked and fixed to the connection port 34 to be installed on the main body 15 of the vacuum cleaner. In this state, as shown in FIG. 1(b), the switching valve 39 is supported from below by contacting the contact surface 62 with the upper end of the accessory mounting portion 85, and the switching port 56 is closed by the switching valve 39 (switching port closing portion). 63) cover, and press the sealing member 64 against the inner edge of the switching port 56 to seal the switching port 56 seamlessly, thereby selecting the blower air passage 38 . In addition, by connecting the exhaust communication port 81 to the connection port 34 , the attachment 17 communicates with the blower air duct 38 . Further, when the switching valve 39 is rotated upward and the release portion 86 of the attachment 17 is pulled out from the insertion port 65 , the locking portion 40 of the switching valve 39 is reset by the urging force of the spring 69 .

In addition, in the state of using one blowing of the dust collecting part 22, in the electric vacuum cleaner 11, the user holding the handle 27 operates the setting button 28, so that the control part 24 drives the electric blower 23 with the set operation, And the outlet 82 of the attachment 17 is moved towards the surface to be cleaned and moved in the front-back direction or the oblique direction with respect to the surface to be cleaned, while utilizing the exhaust gas (exhaust pressure) generated by the driving of the electric fan 23 to blow away the dust on the surface to be cleaned .

At this time, the electric vacuum cleaner 11 generally inhales air from the main body connection port 26, sucks the sucked air into the electric fan 23 through the dust collecting part 22, and flows from the electric fan 23 through the blower air passage 38 to the main body of the vacuum cleaner from the connection port 34. Air is discharged from the outside of the connector 15, and the air is discharged from the accessory 17 connected to the connection port 34 through the discharge port 82. More specifically, the air inhaled from the main body connection port 26 is sucked into the dust collecting part 22 through the suction air passage 35, the first communication port 31 and the dust collecting suction port 48, and the dust contained slightly in the dust collecting part 22 is removed from the air. After the air is separated, it is discharged from the dust collection part 22 to the main body part 21 through the dust collection exhaust port 49 and the second communication port 32, and is sucked into the electric fan 23 through the communication air passage 36 to cool the electric fan 23. Afterwards, the air is discharged from the connection port 34 to the outside of the vacuum cleaner main body 15 through the blower air passage 38, and is gradually narrowed and passed through the exhaust communication port 81 communicating with the connection port 34 toward the discharge port 82, thereby passing through Exit 82 is blown out forcefully.

In addition, in other blowing use states without using the dust collecting part 22, the electric vacuum cleaner 11 generally sucks air from the second communication port 32 to the communication air passage 36, and the sucked air is blown from the electric fan 23 through the blower air passage 38. Air is discharged from the connection port 34 to the outside of the cleaner main body 15 , and the air is blown from the accessory 17 connected to the connection port 34 through the discharge port 82 . Dust slightly contained in the inhaled air is collected by the filter 51 arranged at the second communication port 32 . In addition, since the air flow before being blown out from the discharge port 82 of the attachment 17 on the downstream side of the second communication port 32 is the same as above, description thereof will be omitted.

When the cleaning is completed, the user operates the setting button 28 to stop the electric fan 23 by the control unit 24 .

In addition, the user removes the attachment 17 from the cleaner main body 15 when the use as the blower ends. Specifically, when the user grips the operated parts 88 located on the left and right sides, the accessory locking part 87 of the accessory 17 retreats against the biasing force of the spring, and is detached from the accessory locking receiving part. The lock to the cleaner main body 15 is released. And as the accessory 17 is pulled out downward, the accessory mounting part 85 is drawn out from the connecting port 34, the switching valve 39 is reset by the biasing force of the spring 67, the switching port 56 is opened and the connecting port sealing part 61 covers the connecting port 34 and seals it. The member 64 closes the gap with the connection port 34 , thereby switching from the blower air passage 38 to the exhaust air passage 37 . In addition, with regard to the locking portion 40 , the locking claw portion 40 b is brought into contact with the locking receiving portion 53 by the downward rotation of the switching valve 39 , and the guided portion 40 c is in sliding contact with the guide portion 66 a of the switching valve 39 to slide in the space portion 66 . Inwardly moving forward, the locking claw portion 40b recedes forward relative to the locking receiving portion 53 and slides into contact with the locking receiving portion 53 , and resists the force of the spring 69 at a position lower than the locking receiving portion 53 . Forced to return further, the switching valve 39 is locked and fixed in a state where the connection port 34 is closed.

According to one embodiment described above, the switching valve 39 capable of opening and closing the connection port 34 is locked and fixed at a position closing the connection port 34 by the locking portion 40 , and the switching valve 39 is released by attaching the accessory 17 to the connection port 34 . Based on the fixing of the locking part 40, the switching valve 39 operates to open the connection port 34 and switch to the blower air passage 38, so only when the attachment 17 is installed, in other words, at the same time as the attachment 17, the switching valve 39 opens the connection port. 34. Therefore, leakage of exhaust gas from the connection port 34 other than when the attachment 17 is attached can be prevented. That is, the connection port 34 needs to be closed when the electric vacuum cleaner 11 is used as a suction cleaner. Worry about opening the lid. In particular, since the connection port 34 is located at the bottom of the main body portion 21, if the connection port 34 is accidentally opened when the electric vacuum cleaner 11 is used as a suction vacuum cleaner, the exhaust gas of the electric fan 23 will disperse from the connection port 34, which may Blows away the dust on the swept surface that is about to be inhaled. Therefore, according to the present embodiment, such inconveniences can be prevented by configuring as described above.

The locking part 40 operates so that the fixing of the switching valve 39 is released by the release part 86 of the accessory 17 when the attachment 17 is attached to the connection port 34, so that the switching valve 39 is reliably fixed by the locking part 40 when the accessory 17 is not in use. The valve 39 can prevent the connection port 34 from opening and dust from entering when the attachment 17 is not in use.

The switching valve 39 capable of opening and closing the connection port 34 utilizes the opening and closing to alternately switch the exhaust air passage 37 and the blower air passage 38, and the attachment 17 can be attached to and detached from the connection port 34 opened by the switching valve 39, thereby switching In the state of the blower air passage 38 , almost all of the exhaust air from the electric fan 23 can be supplied from the connection port 34 to the accessory 17 without generally flowing to the exhaust air passage 37 side. Therefore, when electric vacuum cleaner 11 is used as a blower, the exhaust gas of electric fan 23 can be efficiently used, and a sufficient amount of exhaust gas can be blown out from attachment 17 to blow dust efficiently.

In addition, since the attachment 17 fixes the switching valve 39 switched to the blower air passage 38 by being attached to the connection port 34, it is possible to maintain the switching valve in a state switched to the blower air passage 38 with a simple structure without using another structure. 39.

In addition, by setting the switching valve 39 as a valve body provided with a rotating shaft 39a on the downstream side of the exhaust of the electric fan 23, the switching valve 39 rotated to switch to the state of the blower air passage 38, the exhaust of the electric fan 23 Since the pressure is applied in the direction of pressing the switching valve 39 (sealing member 64 ) to the switching port 56 , the sealing performance can be easily improved.

The suction air passage 35 is provided in front of the main body 21 compared with the electric blower 23, and the connection port 34 is arranged between the suction air passage 35 and the electric blower 23, thus, it can be arranged with high efficiency, and can Make the discharge port 82 of the accessory 17 close to the main body connection port 26, when the electric vacuum cleaner 11 is used as a suction cleaner for sucking dust from the main body connection port 26 or as a blower for blowing air from the discharge port 82 of the accessory 17 In this case, the vacuum cleaner main body 15 can be used in substantially the same posture, and the usability is improved. In addition, since the main body connection port 26, which becomes an air suction port, is close to the discharge port 82 when the electric vacuum cleaner 11 is used as a blower, the blown dust can be sucked from the main body connection port 26 by the air blown out from the discharge port 82. Can be cleaned efficiently.

Moreover, by arranging at least a part of the blower air duct 38 and the exhaust port 33 in front of the electric fan 23 in the main body part 21, it becomes a more efficient arrangement.

And, by making a part of the exhaust air passage 37 and the blower air passage 38 a common air passage 55, compared with the case where the exhaust air passage 37 and the blower air passage 38 are independently provided, the vacuum cleaner main body 15 (main body part) 21) It is downsized and can easily configure a structure in which the exhaust air passage 37 and the blower air passage 38 are switched by the switching valve 39 .

Moreover, convenience of use can be further improved by making electric vacuum cleaner 11 into a cordless type which uses secondary battery 25 as a power supply. In particular, in the case of the electric vacuum cleaner 11 using the secondary battery 25 as a power source, for example, compared with an electric vacuum cleaner using an external power source such as a commercial AC power supply as a power source, in order to efficiently use a limited power source, the use of power, exhaust gas There are often fewer electric blowers 23, so when used as a blower, the exhaust air from the electric blowers 23 can be used almost entirely, and even the electric blowers 23 with a small exhaust volume can reliably blow off dust. . Moreover, by making the electric vacuum cleaner 11 a hand-held type, the convenience of use can be further improved, and it is not necessary to form an air path longer than necessary on the suction side and the exhaust side of the electric fan 23, and it can be completed only by the vacuum cleaner main body 15. wind road.

Moreover, when electric vacuum cleaner 11 is used as a blower, the dust contained in the air can be prevented from being sucked into electric blower 23 by setting dust collecting part 22 in a state in which dust collector 22 is attached in advance. On the other hand, when the electric vacuum cleaner 11 is used as a blower, in the state where the dust collecting part 22 is removed, the weight can be reduced, and the air suction path of the electric blower 23 is shortened, and the loss of the air passage is suppressed. Able to blow out more powerful exhaust.

In addition, in the above-mentioned one embodiment, the switching valve 39 is configured to be opened and closed by the attachment of the attachment 17 to the connection port 34 , but it may be configured so as to open and close the connection port 34 independently of the attachment of the attachment 17 to the connection port 34 . Opening and closing (switching the exhaust air passage 37 and the blower air passage 38).

In addition, the electric vacuum cleaner 11 is a cordless electric vacuum cleaner built in with the secondary battery 25 as a power source, but may be a corded type electric vacuum cleaner that obtains power from an external power source such as a commercial AC power supply.

Although one embodiment of the present invention has been described, this embodiment is presented as an example and does not intend to limit the scope of the invention. This new embodiment can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and spirit of the invention, and are also included in the invention described in the claims and its equivalent scope.

Claims (10)

1. An electric vacuum cleaner, characterized in that it possesses: The main body is equipped with an electric fan; A dust collecting part communicates with the suction side of the electric fan, and collects dust by the action of the electric fan; an exhaust port is arranged on the main body; An exhaust air path is arranged on the main body and connects the exhaust side of the electric fan with the exhaust port; A connecting port is arranged on the main body; The blower air passage is arranged on the main body, and connects the exhaust side of the electric fan with the connection port; a switching mechanism configured to be able to open and close the connecting port, and use the opening and closing to switch the exhaust air path and the blower air path; and The accessory is installed on the connecting port, and communicates with the air passage of the blower through the switching of the switching mechanism. 2. The electric vacuum cleaner according to claim 1, characterized in that, Equipped with a fixing mechanism, the switching mechanism is fixed at the position of the closed connection port, When the attachment is attached to the connection port, the fixation of the switching mechanism by the fixing mechanism is released, and the switching mechanism operates so as to open the connection port and switch to the blower air path. 3. The electric vacuum cleaner according to claim 2, characterized in that, The accessories are equipped with a cancellation department, The fixing mechanism is operated so that the fixing of the switching mechanism is released by the release unit when the attachment is attached to the connection port. 4. The electric vacuum cleaner according to claim 2 or 3, characterized in that, The accessory fixes the switching mechanism that switches to the blower air path by attaching to the connection port. 5. The electric vacuum cleaner according to claim 1, characterized in that, The switching mechanism uses the opening and closing of the connection port to alternately switch the exhaust air path and the blower air path, The attachment can be attached to and detached from the connection port opened by the operation of the switching mechanism. 6. The electric vacuum cleaner according to claim 5, characterized in that, The attachment opens the connection port with the attachment to the connection port. And fix the switching mechanism that switches to the blower air path. 7. The electric vacuum cleaner according to any one of claims 1 to 6, characterized in that: The switching mechanism is a valve body provided with a rotating shaft on the downstream side of the exhaust of the electric fan. 8. The electric vacuum cleaner according to any one of claims 1 to 7, characterized in that: It has a suction air path, which is arranged in front of the electric fan in the main body and communicates with the suction side of the electric fan, The connection port is disposed between the suction air path and the electric fan. 9. The electric vacuum cleaner according to claim 8, characterized in that, At least a part of the air duct of the blower and the exhaust port are located in front of the electric fan in the main body. 10. The electric vacuum cleaner according to any one of claims 1 to 9, characterized in that: The electric vacuum cleaner is a hand-held electric vacuum cleaner.