JP3501750B2 - Blower / suction unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower / suction device,
In particular, the present invention relates to an air blowing / suction device that selectively switches between air blowing and suction by a switching mechanism.

[0002]

2. Description of the Related Art A blower / suction device having both a blower function and a suction function has been conventionally known, and this device has a switching mechanism for selectively switching the blower function / suction function. Is provided.

For example, in EP 0 792 578 A2, as shown in FIG. 26, there is described an air blowing / suction device provided with a switching mechanism. This device is provided with a blower nozzle 130 having one end attached to the main body 110 and an outlet formed at the other end, and a vacuum nozzle provided in parallel with the blower nozzle 130, having one end attached to the main body 110 and a suction port formed at the other end. 140 are provided. A fan 118 is rotatably supported on the main body 110, and a dust collecting bag 150 for receiving the air sucked from the suction port and containing the dust mixed in the air is connected to the main body 110. Further, the main body 110 is provided with a valve section 160 which is a switching mechanism capable of selectively switching between a vacuum mode position for guiding air to the dust collecting bag 150 and a blower mode position for guiding air to the blower nozzle. In addition, the main body has a fan 1
An air introduction path 110d for communicating 18 with the switching mechanism;
Air introduction path 1 when the switching mechanism is in the blower mode position
Air blown into the switching mechanism from 10d blower nozzle 1
A blower introduction path 110b that is introduced into 30 and a vacuum introduction path 110c that introduces the air introduced from the air introduction path 110d into the switching mechanism into the dust collecting bag 150 when the switching mechanism is in the vacuum mode position are formed. .

In this device, when the valve section 160 is in the position shown by the solid line, the blower mode for blowing air is set, and the air from the fan 118 is blown into the blower introduction path 110b.
Will be introduced to. When the valve portion 160 is at the position shown by the dotted line, the vacuum mode for suction is entered, and the air from the fan 118 is introduced into the vacuum introduction passage 110c.

[0005]

[Problems to be Solved by the Invention]
In the suction device, because of the structure of the valve portion 160, and because the cross-sectional shape of the air passage of the portion communicating from the air introduction passage 110d to the blower introduction passage 110b or the vacuum introduction passage 110c differs depending on the location, etc. It was easy for dust to collect around the. More specifically, a portion of the air introduction passage 110d that abuts on the valve portion 160, a free end portion of the valve portion 160, and a portion where the blower introduction passage 110b and the vacuum introduction passage 110c meet each other, It was easy for dust to collect on the rotatably supported part. Then, due to the accumulated dust and the like, it becomes impossible to reliably switch between blowing and suctioning by the valve unit 160 which is a switching mechanism, which causes a malfunction of the switching mechanism.

Therefore, an object of the present invention is to provide an air blowing / suction device which can reliably switch between air blowing and suction and which has a small number of parts constituting a switching mechanism.

[0007]

In order to achieve the above-mentioned object, the present invention provides a body 10 and a blower nozzle 3 having one end attached to the body 10 and an outlet 30a formed at the other end.
0, a vacuum nozzle 40 provided in parallel with the blower nozzle 30, having one end attached to the main body 10 and a suction port 40a formed at the other end, a fan 18 supported by the main body 10, and the main body 10. A dust collecting bag 50 that is connected and receives the air sucked from the suction port 40a and contains dust mixed in the air, and a vacuum mode position that is provided in the main body 10 and guides the air to the dust collecting bag 50. A switching mechanism 2 capable of selectively switching to a blower mode position for guiding air to the blower nozzle and a fan 1 formed in the main body 10
8 and the air introduction path 10d for communicating the switching mechanism 2 with each other,
The air, which is formed at one end of the blower nozzle 30 in the main body 10 and is introduced into the switching mechanism 2 from the air introducing passage 10d when the switching mechanism 2 is in the blower mode position, is introduced into the blower nozzle 30. Blower introduction path 10b
And a vacuum introducing passage 10c formed in the main body 10 for introducing the air introduced into the switching mechanism 2 from the air introducing passage 10d into the dust collecting bag 50 when the switching mechanism 2 is in the vacuum mode position. In the blower / suction device including the rotating mechanism 60, the switching mechanism 2 is rotatably supported by the main body 10 and has a rotating member 60 having a cylindrical outer shape. By the rotation of, the tubular communication passage 60a for selectively communicating the air introduction passage 10d with the blower introduction passage 10b or the vacuum introduction passage 10c is formed, and the cross-sectional shape of the communication passage 60a is at any position.
Even if the air introduction path 10d, the blower introduction path 10b and
A blower / suction device having substantially the same cross-sectional shape as the vacuum introduction passage 10c is provided.

Here, the switching mechanism 2 is inserted and fitted in the main body 10, and at the fitting position, a positioning means for selectively positioning the switching mechanism 2 between the vacuum mode position and the blower mode position. It is preferable that 10h, 10i, and 63 are provided.

Further, it is preferable that the rotary member 60 is integrally provided with a switching lever 61 for selectively switching the switching mechanism 2 between the vacuum mode position and the blower mode position.

Further, the main body 10 'that rotatably supports the switching mechanism 2'is provided with rotary support portions 10A and 10B that rotatably support the rotary member 60', and the rotary support portion 10A. 10B, cutout recesses 15j, 15k for circulating an air flow for removing dust adhering to the peripheral surface of the rotary member 60 'around the peripheral surface of the rotary member 60' are preferably formed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An air blowing / suction device according to a first embodiment of the present invention will be described with reference to FIGS. First, the configuration of the entire air blowing / suction device will be described with reference to FIGS. 1 to 3. The blower / suction device 1 has a main body 1
0, a blower nozzle 30 connected to the main body 10, a vacuum nozzle 40, and a dust bag 50. A handle 12 for connecting the power cord 11 is provided on the upper portion of the main body 10, and the main body 10 is integrally provided with a fan case 13 and a motor case 14 located behind the fan case 13. A branch chamber 15 (FIG. 3) that defines a cylindrical hollow space is formed in a portion located substantially below the fan case 13.

A suction collar 16 for inserting a rear end of the vacuum nozzle 40 is provided in front of the fan case 13, and a rear end of the blower nozzle 30 is provided substantially in front of the branch chamber 15. A blow-out collar 17 for insertion is provided, and a suction collar 16 is provided.
The balloon collars 17 are arranged substantially vertically. A dust bag 50 is provided substantially below the branch chamber 15 (FIG. 3).
Has a dust collecting port 10a communicating therewith. A blower introduction path 10b, which is an air passage communicating from the branch chamber 15 to the collar 17, is formed substantially in front of the branch chamber 15 in the main body.
A vacuum introduction passage 10c, which is an air passage communicating from 5 to the dust collecting port 10a, is formed in the main body 10. A blower introduction passage opening 10e is formed in the main body 10 at an end of the blower introduction passage 10b on the branch chamber 15 side, and a vacuum introduction passage opening is formed at an end of the vacuum introduction passage 10c on the branch chamber 15 side. The part 10f is formed.

As shown in FIG. 3, a fan 18 is rotatably provided in the fan case 13, a motor 19 is provided in the motor case 14, and an output shaft 19a of the motor 19 is connected to the fan 18. Has been done. The output shaft 19a of the motor 19 makes a predetermined angle with the longitudinal direction of the vacuum nozzle 40. The fan 18 has a sharp edged cutter, and also has a function of crushing relatively large dust passing through the fan 18. A scroll-shaped air passage 13a is formed between the fan 18 and the fan case 13 so as to communicate with the branch chamber 15 from the suction collar 16. The downstream end of the air passage 13a is connected to the main body 10. It is connected to the air introducing passage 10d that is formed and communicates with the branch chamber 15. An air introduction passage opening 10g is formed at the end of the air introduction passage 10d on the side of the branch chamber 15.

The tip of the blower nozzle 30 has an outlet 30a.
And the rear end of the blower nozzle 30 has a blowing collar 17
Is inserted into. Further, the vacuum nozzle 40 is provided in parallel with and integrally with the blower nozzle 30, the front end thereof forms the suction port 40a, and the rear end thereof is fitted into the suction collar 16. The blower nozzle 30 and the vacuum nozzle 40 are long, but in order to increase the flow velocity of the air blown from the blower nozzle 30, the blower nozzle 30 has a tapered shape toward the blowout port 30a at the tip, and the cross-sectional area thereof is the same as that of the vacuum nozzle 40. It is smaller than the cross-sectional area. On the other hand, the vacuum nozzle 40 has a constant diameter in the longitudinal direction.

The dust collecting port 10a has a dust collecting bag (dust bag) 50 made of a material having air permeability.
The dust nozzle 51 (FIG. 1) for connecting is connected by insertion. The main body 10 has a divided structure, and the main body 10 is divided into a right side main body portion and a left side main body portion in the vertical direction in FIG. Accordingly, the branch chamber 15 is divided into a right branch chamber and a left branch chamber, and the dust nozzle 51 is divided into a right dust nozzle and a left dust nozzle. Further, the vacuum nozzle 40 and the blower nozzle 30 also have a divided structure, and are divided into a right side nozzle portion and a left side nozzle portion in the vertical direction of FIG.

Next, the structure of the switching mechanism 2 will be described with reference to FIGS. The switching mechanism 2 includes a rotating member 60 having a substantially cylindrical outer shape, and is inserted and fitted into a branch chamber 15 (FIG. 3) that forms a hollow cylindrical space. The rotating member 60 is rotatably supported in the branch chamber 15 about its axis. On the upper surface portion 60A of the rotating member 60, as shown in FIG. 4A, a switching lever 61 that projects outward in a substantially single letter shape in the axial direction of the rotating member 60 is integrated with the rotating member 60. It is provided in. The user can switch between blowing and suctioning by manually picking up the switching lever 61 and rotating the rotating member 60 around its axis. Since the rotating member 60 and the switching lever 61 are integrally provided, the switching mechanism 2 for switching between the blower mode and the vacuum mode can be configured by a single component, reducing the cost and reliability of the product. It is possible to improve the durability and the durability of the product.

Inside the rotary member 60, a tubular communication passage 60a which forms a passage for air is formed. Rotating member 60
A substantially rectangular first opening 60b is formed on the peripheral surface of the, and a substantially rectangular second opening is formed on the opposite peripheral surface that forms a predetermined obtuse angle with the axis of the rotating member 60 in between. 60c is formed, and the communication passage 60a is formed with these two openings 60a.
b and 60c are communicated. The communication passage 60a is the rotating member 6
Since it is bent in a substantially square shape inside 0, it is shown in Fig. 4 (b).
As shown in FIG. 6, the inner wall 60d defining the communication passage 60a
A part of is visible when viewed through the opening 60c. Further, since the communication passage 60a is gently bent, a part of the other opening 60b is visible when looking through the opening 60c, as shown in FIG. 4B. The openings 60b and 60c, the blower introduction path opening 10e, the vacuum introduction path opening 10f, and the air introduction path opening 10g (FIG. 3) all have the same shape, and have a substantially rectangular shape as described later. . In addition, the communication passage 60a has a cross-sectional shape of the opening 6 at any position.
0b, and more specifically, the cross-sectional shape of the communication passage 60a is a substantially rectangular shape as shown in FIG.
The cross-sectional shape of the air introduction passage 10d is substantially rectangular as shown in FIG. 11, the cross-sectional shape of the vacuum introduction passage 10c is substantially rectangular as shown in FIG. 13, and the cross-section of the blower introduction passage 10d is shown. Similarly, the shape is a substantially rectangular shape. The cross-sectional shapes of the air introduction passage 10d, the communication passage 60a, the vacuum introduction passage 10c, and the blower introduction passage 10b are substantially the same. The openings 60b and 60c are provided with ribs 62 having the same shape as the openings and slightly protruding outward in the radial direction of the rotating member 60.

When the user looks at the switching mechanism 2 from the outside of the blower / suction device 1, it is possible to recognize in which direction the communication portion 60a is directed, that is, the current mode is the blower mode. As shown in FIG. 4 (a), the upper surface portion 60A of the rotating member 60 has a groove 60e and a groove 60e along the side wall defining the communication passage so that it can be seen at a glance whether the vacuum mode or the vacuum mode. The groove 60f is formed. Further, as shown in FIGS. 4C and 5, a space is formed between the inner wall 60d that defines the communication passage 60a and the peripheral wall that forms the outer periphery of the communication passage 60.

As shown in FIGS. 4 (c) and 6, the peripheral surface of the rotating member 60 is the opening 60b and the opening 60c.
Two slits 60g, 60g are formed at a position approximately in the middle of the opening 60b and the opening 60c on the circumferential surface having a shorter circumferential length in the portion between and. Slit 6
0g and 60g are parallel to each other from the lower surface portion 60B of the rotating member 60 toward the upper surface portion 60A.
It extends to approximately half the axial length of zero. The portion between the two slits 60g, 60g is configured as a rod-shaped body 66, as shown in FIG.
It is elastically deformable in the radial direction. This rod 6
6, a positioning protrusion 63 is provided at an end portion in the vicinity of the lower surface portion 60B and projects outward in the radial direction of the rotating member 60. By engaging the positioning projection 63 with the engagement groove 10h or the engagement groove 10i described later, the rotary member 60 is positioned at an appropriate position in the vacuum mode or the blower mode.

Further, the lower surface portion 60B is provided with an annular convex portion 64 around the lower surface portion 60B which slightly projects in the axial direction of the rotating member 60. An opening 60 that is a part of the annular protrusion 64.
At a position corresponding to the center of c, as shown in FIG. 4C, a rotation stopper 65 protruding parallel to the axial direction of the rotating member 60 is provided. The radial distance from the axis of the rotary member 60 to the rotation stopper 65 is slightly shorter than the radial distance from the axis of the rotary member 60 to the annular protrusion 64. Positioning protrusion 63 and engaging grooves 10h, 1
0i corresponds to a positioning means.

Next, the branch chamber 15 that houses the switching mechanism 2 and the periphery of the branch chamber 15 will be described with reference to FIGS. The branch chamber 15 has substantially the same cylindrical shape as the rotating member 60 of the switching mechanism 2, and its axis is oriented in the left-right direction of the blower / suction device 1. The rotating member 60 is the branch chamber 1
5, the upper surface portion 60 of the rotating member 60 is installed.
Only A is exposed to the surface of the blower / suction device 1, and the other parts of the switching mechanism 2 are accommodated in the branch chamber 15.

Inside the right branch chamber 15a, the switching mechanism 2
The inner wall of the main body 10 at the position where the lower surface portion 60B of the switching mechanism 2 abuts when the housing is stored has substantially the same shape as the annular convex portion 64 provided on the lower surface portion 60B, and the annular convex portion 64. An annular groove 15b is formed so as to be constantly engaged with.
A part of the annular groove 15b is between a position corresponding to the center of the air introduction passage opening 10g and a position corresponding to the center of the blower introduction passage opening 10e, and the circumferential distance between both the center portions is A deep groove portion 15c is formed on the shorter side. The above-mentioned rotation stopper 65 is always in contact with the deep groove portion 15c, and the rotation stopper 65 can be rotated while being in contact with the periphery of the deep groove portion 15c, and the end portion 15d of the deep groove portion 15c,
The rotation is stopped by coming into contact with 15e. Therefore, the rotating member 60 that rotates together with the rotation stopper 65 is restricted to be rotatable only at a predetermined angle.

On the peripheral wall surface of the branch chamber 15, between the air introducing passage opening 10g and the vacuum introducing passage opening 10f, an engaging groove 10h recessed radially outward of the branch chamber 15. Are formed. Further, on the peripheral wall surface of the branch chamber 15, between the air introduction passage opening portion 10g and the blower introduction passage opening portion 10e, an engagement groove 10i recessed radially outward of the branch chamber 15 is provided. Has been formed. These engagement grooves 10h and 10i are configured to be able to engage with the positioning projection 63.

A pressure passage hole 10j having an opening area smaller than that of the dust collecting opening 10a is provided in front of the dust collecting opening 10a. The pressure passage hole 10j communicates with the blower introduction passage 10b, and a part of the air sucked into the dust collecting bag 50 in the vacuum mode is partially discharged.
The pressure of the air in the dust bag 50 is prevented from momentarily becoming too high by letting it escape to 0b.

In the above structure, when the positioning projection 63 of the switching mechanism 2 is engaged with the engagement groove 10h,
The switching mechanism 2 is maintained in the vacuum mode position as shown in FIG. That is, the blower introduction path opening 10e is shielded by the rotating member 60, and the opening 60b,
Reference numeral 60c corresponds to the air introduction passage opening 10g and the vacuum introduction passage opening 10f, respectively, and the communication passage 60a communicates with the air introduction passage 10d and the vacuum introduction passage 10c.

When the start switch (not shown) is operated to rotate the motor 19 in this state, the fan 18 rotates, so that air and dust are sucked from the suction port 40a of the vacuum nozzle 40 and flow into the fan case 13. And fan 1
The crushing function of 8 itself crushes dust and debris,
Air and dust pass through the scroll-shaped passage 13a,
It reaches the inside of the branch chamber 15. Since the rotating member 60 in the branch chamber 15 blocks the blower introduction path opening 10e,
The sucked air and dust are not introduced into the blower nozzle 30, but are guided to the dust bag 50 through the communication passage 60a, the vacuum introduction passage 10c, the dust collection port 10a, and the dust nozzle 51 to smoothly collect dust. . Air introduction path 1 which is a passage of air
0d, the communication passage 60a, and the vacuum introduction passage 10c have substantially the same cross-sectional shape, and there is no extreme angle, so that dust or the like does not accumulate in the switching mechanism 2 and in the vicinity thereof, and It is possible to prevent a failure in the switching operation of the switching mechanism 2.

Next, when the positioning projection 63 of the switching mechanism 2 is engaged with the engaging groove 10h, the switching lever 61 of the switching mechanism 2 is pinched and rotated counterclockwise in FIG. The projection 63 for use is disengaged from the engagement groove 10h, and the positioning projection 63 is engaged with the engagement groove 10i as shown in FIG. The blower mode is maintained by this engagement. As the rotating member 60 rotates, the communication passage 60a also rotates. In this state, the vacuum introduction passage opening 10f is blocked by the rotating member 60, and the air introduction passage 10d, the communication passage 60a, and the blower introduction passage 10b communicate with each other.

When the motor 19 is rotated in this state, the fan 18 rotates as in the vacuum mode.
Air is sucked from the suction port 40a of the vacuum nozzle 40 and flows into the fan case 13, and the sucked air passes through the scroll-shaped passage 13a and the air introduction passage 10
d, introduced into the blower nozzle 30 through the communication passage 60a and the blower introduction passage 10b, and air is blown out from the blowout port 30a. Even in the blower mode, since air is sucked from the suction port 40a of the vacuum nozzle, dust may be sucked together, but since the blower nozzle 30 is formed in a tapered shape, the wind speed sucked from the vacuum nozzle 40 The wind velocity blown from the blower nozzle 30 is faster than that of the blower nozzle 30. As a result, fallen leaves and large dust are blown away, so that large dust and the like are not sucked through the suction port 40a. Also, as in the vacuum mode, the air introduction passage 10d, which is an air passage, and the communication passage 60.
Since the a and the blower introduction path 10b are tubular and have substantially the same cross-sectional shape, dust and the like do not collect in the switching mechanism 2 and in the vicinity thereof, and the switching mechanism 2 uses dust and the like.
It is possible to prevent a failure from occurring in the switching operation of.

Next, an air blowing / suction device 1'according to a second embodiment of the present invention will be described with reference to FIGS. Blower / suction device 1'according to the second embodiment
The feature is that cutout recesses 15j and 15k are formed on the peripheral wall surface of the branch chamber 15 '(Fig. 16) along the outer peripheral surface of the rotating member 60' to allow air flow to circulate. Further, the switching mechanism 2'and the branch chamber 15 'have the first structure.
The switching mechanism 2 and the branch chamber 15 of FIG.

First, the structure of the blower / suction device 1'according to the second embodiment will be described. In the switching mechanism 2 ′, the peripheral surface of the rotary member 60 ′, which is the peripheral surface having the longer circumferential length in the portion between the opening 60b and the opening 60c, and the inner wall defining the communication passage 60a. 60d is the connection plate 6
0C (FIG. 15). Connection plate 60C
Is provided at a substantially middle position in the axial direction of the rotating member 60 'having a substantially cylindrical shape. The connecting plate 60C is provided with a positioning projection 65 'extending in the direction of the lower surface portion 60'B of the rotating member 60'. The positioning protrusion 65 'is
It is in a state of further projecting in the axial direction of the rotating member 60 'from the lower surface portion 60'B. As shown in FIG. 14 (c), the positioning projection 65 ′ has a cross section of the rotating member 6 ′.
It has a substantially arcuate shape following the peripheral surface of 0 ', and a convex portion 6 protruding inward in the radial direction of the rotating member 60' is formed at the center thereof.
5'A is provided. The convex portion 65'A is configured to be engageable with engagement grooves 10k and 10l described later. That is,
The positioning protrusion 65 'is configured to be elastically deformable in the radial direction of the rotating member 60', and the engaging grooves 10k, 10l.
It is possible to engage the convex portion 65'A with or to release the engagement.

A substantially one-letter shaped switching lever 61 '(FIG. 14 (a)) provided in the switching mechanism 2'is provided with two in the longitudinal direction.
The lengths from the axial center of the rotating member 60 'to the two end portions 61A and 61B are different from each other. The length from the shaft center to the one end 61A is longer than the length from the shaft center to the other end 61B.

FIG. 16 shows the inner wall of the main body 10 'which defines the branch chamber 15' and is located at the position where the lower surface portion 60'B of the switching mechanism 2'is opposed when the switching mechanism 2'is housed. As shown in FIG. Plane 10C
Six receiving seats 10E are provided at equal intervals in the circumferential direction on the circumference of the circle. Each receiving seat 10E has a rectangular parallelepiped shape, and one surface of the receiving seat 10E is fixed on the flat surface 10C. When the switching mechanism 2'is housed in the branch chamber 15 ', the other surface facing the one surface abuts the lower surface portion 60'B of the switching mechanism 2', as shown in FIG. The switching mechanism 2'is configured to be supported at a position separated from the flat surface 10C.

Further, on the plane 10C, there is provided an annular rib 10D projecting toward the left branch chamber (not shown).
When the switching mechanism 2'is housed in the branch chamber 15 ', the rib 10D abuts the lower surface portion 60'B of the switching mechanism 2', and together with the receiving seat 10E, as shown in FIG.
The lower surface portion 60'B is configured to be supported at a position separated from the flat surface 10C. The space defined by the flat surface 10C, the rib 10D, and the lower surface portion 60'B forms an escape recess, and even if dust or the like is caught between the flat surface 10C and the lower surface portion 60'B, the rotation member 60 'is prevented. It is configured so as not to cause a malfunction.

As shown in FIG. 16, the engaging groove 10k is provided at a position which is a part of the rib 10D, faces the blower introduction passage opening 10e, and is closest to the air introduction passage opening 10g.
Are formed. Further, an engaging groove 10l is formed at a position which is a part of the rib 10D, faces the vacuum introducing passage opening 10f, and is closest to the air introducing passage opening 10g. The convex portion 65'A of the rotating member 60 'is configured to be engageable with the engaging grooves 10k, 10l. Note that FIG.
Although not shown in FIG. 6, the peripheral wall surface of the branch chamber 15 ′ is provided with the same engagement grooves as the engagement grooves 10h and 10i of the blower / suction device 1 according to the first embodiment, These are configured to be engageable with the positioning projection 63 of the rotating member 60 '.

In a part of the peripheral wall surface of the branch chamber 15 ', which is between the air introduction passage opening 10g and the blower introduction passage opening 10e, the blower introduction is made from a position close to the air introduction passage opening 10g. Rotating member 60 'up to the road opening 10e
The notch recess 15j is formed in a notched state so as to draw an arc of a circle concentric with the peripheral surface of the. The cutout recess 15j allows air to flow between the peripheral wall surface of the branch chamber 15 'and the peripheral surface of the rotary member 60' so that dust and the like attached to the peripheral surface of the rotary member 60 'can be removed. It is configured. The cross section of the cutout recess 15j is substantially rectangular as shown in FIG. 17, and the branch chamber 1 in which the cutout recess 15j is formed is formed.
A portion of the peripheral wall surface of 5 ′ faces the peripheral surface of the rotating member 60 ′ with a predetermined distance. In FIGS. 16 and 22 to 25, a cutout recess 15j is not formed between the air introducing passage opening 10g and the blower introducing passage opening 10e, which is a part of the peripheral wall surface of the branch chamber 15 ', Air introduction path opening 10
The portion defining g forms a rotation support portion 10A that abuts the peripheral surface of the rotation member 60 '.

An air inlet passage opening 10g and a vacuum inlet passage opening 10f which are a part of the peripheral wall surface of the branch chamber 15 '.
In the portion between and, from the position close to the air introduction path opening 10g to the vacuum introduction path opening 10f, the cutout recess 15k is formed so as to draw an arc concentric with the peripheral surface of the rotating member 60 '. Are formed. Notch recess 15k
As with the cutout recess 15j, air flows between the peripheral wall surface of the branch chamber 15 'and the peripheral surface of the rotary member 60' so that dust and the like adhering to the peripheral surface of the rotary member 60 'can be removed. It is configured to be able to. The cross section of the cutout recess 15k is substantially rectangular like the cutout recess 15j, and the portion of the peripheral wall surface of the branch chamber 15 'in which the cutout recess 15k is formed has a predetermined distance from the peripheral surface of the rotating member 60'. Face each other. 16 and 22 to 25, the branch chamber 1
Notch concave portion 15k which is a part of the peripheral wall surface of 5 ', and which is between the air introduction passage opening portion 10g and the vacuum introduction passage opening portion 10f.
The portion that does not have the openings and defines the air introduction path opening portion 10g contacts the peripheral surface of the rotating member 60 '.
Make 0B.

Main body 1 at a position corresponding to the left end of the left branch chamber
An opening 10m (FIG. 20) is formed at 0 '.
The opening 10m is defined by an edge 10I (FIG. 17) protruding inward in the radial direction. The cross section of the edge 10I is substantially J-shaped, and after extending from the main body 10 'in the axial direction of the rotating member 60' and in the direction away from the main body 10 ',
It is in a state of being folded back toward the main body 10 'on the way.

Inside the portion of the edge 10I folded back in the direction of the main body 10 ', the same seats 10E' as those provided on the plane 10C are provided at equal intervals in the circumferential direction of the edge 10I.
It is provided individually. One surface of the seat 10E 'and a surface adjacent to the one surface are fixed to the inside of the folded portion of the edge 10I and the portion of the edge 10I extending in the direction away from the main body. The other surface facing the one surface is in contact with the upper surface portion 60'A of the rotating member 60 '.
The rotating member 60 'is configured to be supported by the receiving seat 10E' at a position separated from the tip of the edge 10I folded back toward the main body 10 'by a predetermined distance. Further, when the switching mechanism 2'is housed in the branch chamber 15 ', a part of the upper surface portion 60'A of the switching mechanism 2'and the switching lever 61' are provided outside the main body 10 'of the blower / suction device 1'. However, the switching mechanism 2'is prevented from jumping out of the opening 10m and coming off.
The receiving seat 10E 'provided on I contacts the rotating member 60' of the switching mechanism 2 ', so that the switching mechanism 2'can be held inside the main body 10'.

A part of the edge 10I forms a rotation stopper 10F which further projects radially inward of the opening 10m. The rotation stopper 10F is bent so that a part of the edge 10I, which is folded back toward the main body 10 ', protrudes inward in the radial direction of the opening 10m.
It is provided in a state of being bent in the 0'direction. The rotation stopper 10F is provided along the circumferential direction of the opening 10m, and faces the substantially central portion of the blower introduction passage opening 10e from a position facing the substantially central portion of the air introduction passage opening 10g (FIG. 18). It is provided on the side where the vacuum introduction path opening 10f is formed, up to the position (FIG. 2).
0).

As described above, the length from the shaft center of the rotating member 60 'to the one end 61A of the switching lever 61' is longer than the length from the shaft center of the rotating member 60 'to the other end 61B. It is composed for a long time. The axis of the rotating member 60 'coincides with the center of the opening 10m, and the length from the axis of the rotating member 60' to one end 61A of the switching lever 61 'is:
Equal to the distance from the center of the opening 10m to the edge 10I,
The length from the axis of the rotating member 60 'to the other end 61B of the switching lever 61' is equal to the distance from the center of the opening 10m to the rotation stopper 10F. Therefore, when the rotating member 60 'is rotated by a predetermined angle, the switching lever 6
One end 61A of 1'abuts on the end 10G or 10H of the rotation stopper 10F in the circumferential direction, so that the switching mechanism 2'is rotatable only within a predetermined angle range. Is regulated by. Rotation stopper 10F
Is the annular convex portion 6 of the switching mechanism 2 according to the first embodiment.
4 and the rotation stopper 65 provided on the annular convex portion 64, the switching mechanism 2'of the blower / suction device 1'according to the second embodiment has the annular convex portion 64 and the rotary convex portion 64. The stopper 65 is not provided.

When one end 61A of the switching lever 61 'is in contact with one end 10H of the rotation stopper 10F, that is, in the vacuum mode position, as shown in FIG. Convex portion 65'A of 65 '
18 is engaged with the engaging groove 10k as shown in FIG. 18, so that the rotating member 60 'is prevented from easily rotating. As shown in FIG. 21, one end portion 61A of the switching lever 61 'has a rotation stopper 1a.
When in contact with one end 10G of 0F, that is, in the blower mode position, the projection 65'A of the positioning projection 65 'engages with the engagement groove 10l as shown in FIG. Therefore, the rotating member 60 'is configured so as not to easily rotate.

Next, the operation of the blower / suction device 1'according to the second embodiment will be described. When the switching mechanism 2'is maintained in the vacuum mode position, as shown in FIG. 18, the convex portion 65'A engages with the engagement groove 10k to position the rotating member 60 'in the vacuum mode position. Has been done. At this time, one end 61A of the switching lever 61 'is in contact with one end 10H of the rotation stopper 10F, as shown in FIG. Rotation stopper 10F allows switching lever 6
Since the rotation of 1'is restricted, when the switching mechanism 2'is in the vacuum mode position, the rotating member 60 'and the positioning projection 65' can rotate only in the direction of the arrow shown in FIG. .

Further, when the switching mechanism 2'is in the vacuum mode position, as shown in FIG.
The peripheral surface of 0'and the rotation supporting portions 10A and 10B are in contact with each other. For this reason, the cutout recesses 15j and 15k are not in communication with the air introduction passage 10d and are in a closed state. Therefore, the air from the air introduction passage 10d is communicated with the communication passage 60a as indicated by an arrow A. Pass the vacuum route 1
0c is introduced.

As shown in FIG. 23, when the switching mechanism 2'is slightly rotated in the counterclockwise direction from the vacuum mode position, that is, in the direction of arrow B, the rotary support portion 10A is provided with the rotary member 60 '. It is not in contact with the peripheral surface.
Therefore, the notch recess 15j communicates with the air introducing passage 10d, and the air from the air introducing passage 10d enters the notch recess 15j and travels around the peripheral surface of the rotating member 60 ', as shown by the arrow. The dust and the like adhering to the peripheral surface of 60 'and the cutout recess 15j flow out to the blower introduction path 10b. On the other hand, the rotation supporting portion 10B is in contact with the peripheral surface of the rotating member 60 ', but the second supporting member formed on the rotating member 60'.
The opening 60c faces the cutout recess 15k and the vacuum introduction passage 10c. Therefore, the air from the air introduction passage 10d flows out to the vacuum introduction passage 10c through the communication passage 60a, passes through the communication passage 60a and the cutout recess 15k, and adheres in the cutout recess 15k. The dust and the like are flowing out to the vacuum introduction path 10c.

When the switching mechanism 2'rotates further in the direction of arrow B from the state shown in FIG. 23 to the state shown in FIG. 24, the rotation support portion 10A contacts the peripheral surface of the rotating member 60 '. Although in contact with each other, the first opening 60b formed in the rotating member 60 'includes the cutout recess 15j and the blower introduction path 1
It faces 0b. Therefore, the air from the air introduction passage 10d passes through the communication passage 60a and flows out to the blower introduction passage 10b as shown by the arrow A, and also passes through the communication passage 60a and the notch recess 15j. Notch recess 15
Dust and the like adhering to the inside of j will flow out to the blower introduction path 10b. On the other hand, the rotation support portion 10B includes the rotation member 6
It is not in contact with the peripheral surface of 0 '. Therefore, the cutout recess 1
5k communicates with the air introduction passage 10d, and the air from the air introduction passage 10d enters the cutout recess 15k to rotate the rotary member 60 '.
Around the peripheral surface of the rotary member 60 'and the cutout recess 15k.
Along with dust adhering inside, vacuum introduction path 10c
It flows out to.

When the switching mechanism 2'is in the blower mode position, as shown in FIG.
Positioned to engage 0l to maintain the rotating member 60 'in the blower mode position. At this time, the switching lever 6
As shown in FIG. 21, one end 61A of 1'is in contact with the other end 10G of the rotation stopper 10F. Since the rotation of the switching lever 61 'is restricted by the rotation stopper 10F, when the switching mechanism 2'is in the blower mode position, the rotating member 60' and the positioning projection 65 'are in the direction of the arrow shown in FIG. It can only be rotated.

Further, when the switching mechanism 2'is in the blower mode position, as shown in FIG. 25, the rotating member 60 '.
The peripheral surface and the rotation support portions 10A and 10B are in contact with each other. Therefore, the cutout recesses 15j and 15k are formed in the air introduction passage 1
The air from the air introducing passage 10d is introduced into the blower introducing passage 10b through the communicating passage 60a, as indicated by the arrow, because the air is not in communication with 0d and is in a closed state.

The cutout recess 1 is formed in a part of the peripheral wall surface of the branch chamber 15 '.
Since 5j and 15k are formed, when the blower mode position is switched to the vacuum mode position or when the vacuum mode position is switched to the blower mode position, air flows into the cutout recesses 15j and 15k, and dust around the switching mechanism 2 ', etc. Therefore, accumulation of dust and the like around the switching mechanism 2'and inside the switching mechanism 2'can be prevented more reliably.

The blower / suction device according to the present invention is not limited to the above-mentioned embodiment, but various modifications and improvements can be made within the scope of the claims. For example, in the first embodiment, the rotation member 60 is provided with the positioning protrusion 63 and the branch chamber 15 of the main body 10 is formed with the engagement grooves 10h and 10i. However, the rotation member 60 is formed with the engagement groove. However, the branching chamber 15 may be provided with a positioning projection so that the engagement groove and the positioning projection can be engaged with each other.

[0050]

According to the blower / suction device of the first aspect, the switching mechanism for switching between the blower mode position and the vacuum mode position is rotatably supported by the main body and has a tubular communication passage therein. Since it is composed of the rotating member formed with, the accumulation of dust and the like around the switching mechanism and inside the switching mechanism can be prevented, and the movement of the switching mechanism can be prevented from being disturbed by the accumulated dust and the like. .

In addition , the cross-sectional shape of the communication passage is at any position.
Also in the above, since the cross-sectional shape of the air introduction passage, blower introduction passage and vacuum introduction passage formed in the main body is substantially the same, a smooth air flow can be achieved, and it is difficult for dust and the like to collect around the switching mechanism. be able to.

According to the blower / suction device of the second aspect ,
Since the positioning means for selectively positioning the vacuum mode position and the blower mode position is provided, the user can very easily set the switching mechanism to the vacuum mode position or the blower mode position.

According to the blower / suction device of claim 3 ,
Since the switching mechanism can be configured by one component, it is advantageous in terms of cost, assembling, maintenance, and the like.

According to the blower / suction device of claim 4 ,
When the blower mode position is switched to the vacuum mode position, a cutout recess is formed in the rotation support portion for circulating an air flow around the rotation member to remove dust adhering to the rotation member. Alternatively, when switching from the vacuum mode position to the blower mode position, air can be made to flow into the cutout recess, and the inflowing air can carry out dust and the like around the switching mechanism. For this reason,
It is possible to more reliably prevent accumulation of dust and the like around the switching mechanism and inside the switching mechanism, and it is possible to more reliably prevent damage to the switching mechanism.

[Brief description of drawings]

FIG. 1 is a side view showing an air blowing / suction device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an air blowing / suction device according to the first embodiment of the present invention.

FIG. 3 is a schematic sectional view showing an air blowing / suction device according to the first embodiment of the present invention.

FIG. 4 shows a switching mechanism of the blower / suction device according to the first embodiment of the present invention, in which (a) is a plan view, (b) is a front view, and (c) is a bottom view.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is a side view showing a switching mechanism of the air blowing / suction device according to the first embodiment of the present invention.

7 is a cross-sectional view taken along the line VII-VII of FIG.

FIG. 8 is a cross-sectional view of essential parts showing a blower / suction device according to the first embodiment of the present invention.

FIG. 9 is a cross-sectional view of essential parts showing a vacuum mode position of the blower / suction device according to the first embodiment of the present invention.

FIG. 10 is a cross-sectional view of essential parts showing a blower mode position of the blower / suction device according to the first embodiment of the present invention.

FIG. 11 is a diagram showing an internal contour shape of an air introduction path taken along line XI-XI in FIG. 9.

FIG. 12 is a diagram showing an internal contour shape of a communication passage taken along line XII-XII in FIG. 9.

13 is a diagram showing an internal contour shape of a vacuum introduction path taken along line XIII-XIII in FIG.

FIG. 14 is a view showing a switching mechanism of the blower / suction device according to the second embodiment of the present invention, (a) is a plan view,
(B) is a side view showing a partial cross section, and (c) is a bottom view.

FIG. 15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a cross-sectional view of essential parts showing a blower / suction device according to a second embodiment of the present invention.

FIG. 17 is a cross-sectional view of main parts taken along the line XVII-XVII of FIG. 18.

FIG. 18 is a schematic diagram showing the vacuum mode position of the switching mechanism in the branch chamber of the blower / suction device according to the second embodiment of the present invention.

FIG. 19 is a schematic diagram showing the blower mode position of the switching mechanism in the branch chamber of the air blowing / suction device according to the second embodiment of the present invention.

FIG. 20 is a side view of the essential parts showing the vacuum mode position of the switching mechanism in the branch chamber of the blower / suction device according to the second embodiment of the present invention.

FIG. 21 is a side view of the essential parts showing the blower mode position of the switching mechanism in the branch chamber of the blower / suction device according to the second embodiment of the present invention.

FIG. 22 is a schematic diagram showing a vacuum mode position of the blower / suction device according to the second embodiment of the present invention.

FIG. 23 is a schematic diagram showing a state in which the rotating member of the blower / suction device according to the second embodiment of the present invention is rotated slightly counterclockwise from the vacuum mode position.

FIG. 24 is a schematic diagram showing a state in which the rotating member of the blower / suction device according to the second embodiment of the present invention is rotated slightly counterclockwise as compared with the state shown in FIG.

FIG. 25 is a schematic diagram showing a blower mode position of the blower / suction device according to the second embodiment of the present invention.

FIG. 26 is a cross-sectional view of essential parts showing a conventional switching mechanism of a blower / suction device.

[Explanation of symbols]

1, 1'Blower / suction device 2, 2'switching mechanism 10, 10 'body 10b Blower introduction route 10c Vacuum introduction route 10d Air introduction path 10h, 10i engagement groove 15c deep groove 15k, 15j Notched recess 18 fans 30 blower nozzle 30a outlet 40 vacuum nozzle 40a suction port 50 dust bag 60, 60 'rotating member 60a communication passage 61, 61 'switching lever 63, 63 'Positioning protrusion 65, 65 'rotation stopper

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 5/14 B08B 5/00

Claims (4)

(57) [Claims] 1. A main body, a blower nozzle having one end attached to the main body and an outlet formed at the other end, and a blower nozzle provided in parallel with the blower nozzle, having one end attached to the main body and a suction port formed at the other end. A vacuum nozzle, a fan supported by the main body, a dust collection bag connected to the main body for receiving air sucked from the suction port and containing dust mixed in the air, and provided on the main body. A switching mechanism that can selectively switch between a vacuum mode position that guides air to the dust bag and a blower mode position that guides air to the blower nozzle; and a switching mechanism formed in the main body that connects the fan and the switching mechanism. An air introduction path to be formed, which is formed in the main body at one end side of the blower nozzle,
A blower introduction path for introducing the air introduced into the switching mechanism from the air introduction path to the blower nozzle when the switching mechanism is in the blower mode position, and the switching mechanism formed in the main body so that the switching mechanism is in the vacuum mode position. In a blower / suction device provided with a vacuum introduction path for introducing air introduced into the switching mechanism from the air introduction path to the dust collecting bag at a certain time, the switching mechanism is rotatably supported by the main body. A tubular communication path having a cylindrical outer shape, and inside the rotating member, the air introducing passage is selectively communicated with the blower introducing passage or the vacuum introducing passage by rotation of the rotating member. Is formed, and the cross-sectional shape of the communication passage is
Sections of the introduction passage, the blower introduction passage, and the vacuum introduction passage
An air blower / suction device characterized by having almost the same shape . 2. The switching mechanism is inserted and fitted in the main body,
The air blower / sucker according to claim 1 , wherein the fitting position is provided with a positioning means for selectively positioning the switching mechanism between the vacuum mode position and the blower mode position. apparatus. 3. The rotating member is integrally provided with a switching lever for selectively switching the switching mechanism between a vacuum mode position and a blower mode position.
The blower / suction device according to claim 1 . 4. A portion of the main body that rotatably supports the switching mechanism is provided with a rotation support portion that rotatably supports the rotation member, and the rotation support portion includes a peripheral surface of the rotation member. 2. The blower / suction device according to claim 1, wherein a cutout concave portion is formed for circulating an air flow for removing attached dust around the peripheral surface of the rotating member.