JP4215529B2 - Suction port body and electric vacuum cleaner provided with the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction port body having communication means for appropriately communicating a dust suction chamber provided in a suction port body and an external space, and a vacuum cleaner provided with the suction port body.
[0002]
[Prior art]
As a conventional suction inlet, what is shown in FIG. 8 is known (refer patent document 1).
[0003]
The suction port body 1 has a suction port body 2 composed of a lower case 2a and an upper case 2b. And this suction inlet main body 2 is provided with the dust suction chamber 3 inside, and the suction opening 3a to the dust suction chamber 3 is provided in the bottom face. Further, a dust suction port 4 that opens to the lower surface is formed in the front surface of the suction port body 2, and an opening / closing body 5 for changing the opening amount is rotatable in the dust suction port 4. Is provided.
[0004]
As shown in FIG. 8B, the opening / closing body 5 is not shown so that the lower end edge 5a curved rearward is opposed to the bottom surface 2c of the lower case 2a and the projection 5b protrudes forward. It is held by the open / close holding means.
[0005]
According to this suction inlet 1, when cleaning the surface to be cleaned, the dust inlet 4 is substantially closed by the opening / closing holding means with the lower end edge 5 a of the opening / closing body 5 facing the surface to be cleaned. Yes.
[0006]
When the front surface of the suction port body 1 comes into contact with furniture or the like, the projection 5b protruding forward contacts the furniture or the like, and rotates the opening and closing body 5 against the open / close holding means to thereby remove the dust suction port. The entire surface of 4 is opened.
[0007]
A suction port as shown in FIG. 9 is also considered.
[0008]
The suction port body 6 has a suction port body 7, and the suction port body 7 is provided with a dust suction chamber 8 therein, and a suction opening 8 a to the dust suction chamber 8 is provided on the bottom surface. Further, on the front side of the suction port body 7, there is provided a rotating body 9 that is rotated by a frictional force generated between the suction port body 7 and the surface to be cleaned as the suction body 7 moves in the front-rear direction.
[0009]
The surface of the rotating body 9 is provided with a concave portion 9a that forms a gap with the surface to be cleaned and a contact friction surface 9b that comes into contact with the surface to be cleaned when rotated by a predetermined angle.
[0010]
[Patent Document 1]
JP 2002-65523 A (paragraph 0019, paragraph 0020, paragraph 0032, FIG. 1, FIG. 4)
[0011]
[Problems to be solved by the invention]
However, in the suction port body 1 described above, since the dust suction port 4 opens when the front surface of the suction port body 1 comes into contact with furniture or the like, the dust suction chamber 4 is closed in a normal moving state, and the suction port body. It was difficult to sufficiently suck the dust in front of 1.
[0012]
On the other hand, in the suction port body 6, the rotating body 9 rotates by a predetermined angle even in the normal moving state, so that the concave portion 9 a and the surface to be cleaned are opposed to each other. Thereby, a gap is formed between the concave portion 9a and the surface to be cleaned, and the dust in front of the suction port body 6 is sucked.
[0013]
However, the suction port body 6 is in contact with the surface to be cleaned because the side surface in the width direction of the contact friction surface 9a that contacts the surface to be cleaned extends along the direction orthogonal to the suction opening 8a. There has been a problem that dust easily adheres to the contact friction surface 9a.
[0014]
Further, when the width of the suction port body 7 in the width direction of the contact friction surface 9a is reduced in order to reduce the contact area between the contact friction surface 9a to which dust adheres and the surface to be cleaned, the suction port body 7 is When moving in the direction, the rotating body 9 may be bent by a frictional force acting on the rotating body 9.
[0015]
The present invention has been made in view of the above problems, and can appropriately prevent the dust from adhering to the communication means for sufficiently sucking the dust in front by appropriately communicating the external space and the dust suction chamber. It aims at providing the suction inlet which can prevent a deformation | transformation of a means.
[0016]
[Means for Solving the Problems]
Suction port body of the present invention includes a suction port body having a suction opening at the on and the bottom is provided the dust suction chamber to said dust suction chamber therein, the dust suction external space provided in the suction port body And a communication means for appropriately communicating with the chamber , the communication means is located at least one of the front and rear of the suction opening, and extends in the width direction of the suction port body along the suction opening; has a rotatably provided with the rotating body, the rotating body is in contact with the surface to be cleaned with the movement in the longitudinal direction of the suction port body, the frictional force generated between the surface to be cleaned a contact friction surface for rotating the rotary body, the rotary body there is provided a recess forming a gap between the surface to be cleaned when the predetermined angle rotation, the contact friction surface, the wiping member Provided, and the rotating body is rotated by a predetermined angle. The in close contact with the surface to be cleaned and cut off with the external space and the dust suction chamber, the recess, the width of the width direction is formed to be narrower toward the dust suction chamber side It is a feature.
[0017]
According to the present invention, the contact friction surface provided on the rotating body of the communication means is formed so that the width in the width direction of the suction port body becomes wider toward the dust suction chamber side. It is possible to reduce the contact area with the surface to be cleaned on the outer space side of the contact friction surface which is easy to be made, and to make it difficult to adhere dust.
[0018]
Furthermore, since the negative suction pressure acting on the dust suction chamber is relatively large on the dust suction chamber side of the contact friction surface, the dust adhering to the contact friction surface can be sufficiently sucked, and the dust adhesion can be prevented. .
[0019]
Further, since the rotating body is formed so that the width in the width direction of the contact friction surface on the dust suction chamber side is wide, the rotating body is caused by the frictional force generated by the movement of the suction port body in the front-rear direction. It is possible to prevent bending and deformation.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a suction port according to the present invention will be described with reference to the drawings.
[0021]
As shown in FIG. 1, the electric vacuum cleaner 10 includes a vacuum cleaner body 11 that extends long in the vertical direction, a substantially cylindrical dust collecting container 12 that is detachably attached to the vacuum cleaner body 11, and a vacuum cleaner body 11. The suction air duct 13 is provided at the lower end of the suction air duct 13 and is detachably provided at one end of the suction air duct 13. The vacuum cleaner 10 is a so-called upright type vacuum cleaner.
[0022]
The cleaner body 11 has a hollow case body 14 having a substantially cylindrical shape, and a handle body 15 provided on the side of the case body 14 and extending upward.
[0023]
In the case body 14, an electric blower 14a and a cord reel 14b are arranged in this order from the bottom. The case body 14 is detachably provided with a dust collecting container 12 via a mounting portion (not shown) formed on the lower surface. The dust collecting container 12 and the electric blower 14 a are communicated with each other through an air passage formed in the case body 14.
[0024]
The suction air duct 13 is a hollow pipe extending downward from the vicinity of the lower end of the handle body 15 and is a dust suction chamber formed inside the suction port 20 attached to the lower end. 22 is communicated. The suction air duct 13 and the suction opening 20 are provided via a connecting pipe 16 provided at the rear part of the suction opening 20 so as to be able to rise and fall. Further, a mounting opening (not shown) is formed on the side surface of the other end of the suction air duct 13, and the suction air duct 13 is communicated with the dust collecting container 12 through this attachment opening.
[0025]
As shown in FIG. 2, the suction port body 20 has a suction port body 21. The outside of the suction inlet main body 21 includes a main body case 22 having a lower case 22a and an upper case 22b coupled to the lower case 22a (see FIG. 4). A dust suction chamber 23 is formed in the main body case 22.
[0026]
A suction opening 24 for sucking dust is opened on the bottom surface of the lower case 22a, and a rotary cleaning body 25 is rotatably disposed in the dust suction chamber 23 so as to face the suction opening 24 ( (See FIG. 4).
[0027]
The rotary cleaning body 25 has a blade 25a and a brush 25b, and is rotationally driven by a motor (not shown) disposed in the suction port body 21. In FIG. 2, the rotary cleaning body 23 is omitted.
[0028]
As shown in FIG. 2, a detection roller 26 that rotates as the suction port body 21 moves is provided on the bottom surface of the lower case 22 a, and depending on the rotation direction of the detection roller 26, Retreat is detected. Based on the detection result of the detection roller 26, the rotation direction of a motor (not shown) is controlled. A rear wheel 27 is attached to the rear part of the lower case 22a.
[0029]
Further, as shown in FIG. 4, a recess 28 is formed in front of the suction opening 24 and at the front end of the suction port body 21 so as to communicate with the external space in front of the suction port body 21. And in this recess 28, the rotation body 30 which is a communication means is rotatably provided. A vertical wall 29 is provided between the recess 28 and the suction opening 24, and a gap G is formed between the lower end surface of the vertical wall 29 and the surface to be cleaned M.
[0030]
The rotating body 30 is a communication means for appropriately communicating the external space and the dust suction chamber 23, and extends in the width direction (hereinafter referred to as the width direction) of the suction port body 21 along the suction opening 24 as shown in FIG. In addition, it has a substantially cylindrical shape. In addition, this width direction is a direction shown by the arrow in FIG.
[0031]
The surface of the rotating body 30 comes into contact with the surface to be cleaned M as the suction port body 21 moves in the front-rear direction, and the rotating body 30 is rotated by the frictional force generated between the surface of the rotating body 30 and the surface to be cleaned M. A plurality of contact friction surfaces 31 are provided, and a recess 32 is formed so as to face the surface to be cleaned M and form a gap between the surface to be cleaned M when the rotating body 30 rotates by a predetermined angle. . In addition, some of the recesses 32 are located between the plurality of contact friction surfaces 31.
[0032]
The contact friction surface 31 is provided at each of three positions of the central portion of the rotating body 30 and symmetrical positions that are equidistant from the central portion with the central portion interposed therebetween. Each contact friction surface 31 bulges in an arc shape with respect to the recess 32 and is formed across the longitudinal edge of the recess 32. Thereby, when the rotation body 30 rotates, it can contact to the to-be-cleaned surface M smoothly.
[0033]
Further, the contact friction surface 31 is formed so that the width in the width direction gradually increases toward the dust suction chamber 23 side, and is formed in a taper shape such that the side surfaces in the width direction are gradually separated. Here, the front space has a substantially trapezoidal shape with a predetermined width in the width direction on the outer space side, but may have a substantially triangular shape in front view with little width in the width direction on the outer space side. .
[0034]
The recesses 32 are respectively provided between the adjacent contact friction surfaces 31 and are provided at both ends of the rotating body 30. The recess 32 is formed on a flat surface and is more indented than the contact friction surface 31. Here, the contact friction surface 31 is recessed by substantially the same distance as the gap G between the lower end surface of the vertical wall 29 and the surface to be cleaned M.
[0035]
Further, support shafts 33, 34 are provided on both end surfaces of the rotating body 30, and these support shafts 33, 34 are rotatably attached to both side walls of the recess 21 of the suction port body 21. In addition, the wiping member 30 </ b> A is attached to the entire surface of the rotating body 30 except for the plurality of concave portions 32 and the side surfaces in the width direction of the contact friction surface 31. The wiping member 30 </ b> A is a raised cloth or the like, and is in close contact with the inner surface of the recess 28 when the rotating body 30 is disposed in the recess 28. The wiping member 30 </ b> A is also attached to the contact friction surface 31.
[0036]
Furthermore, although not shown in the drawing, stoppers that restrict the rotation angle of the rotating body 30 to a range of 90 degrees as shown in FIG. 5 are provided on both end faces of the rotating body 30 or on both side walls of the recess 28. Is provided.
[0037]
Next, the operation of the electric vacuum cleaner 10 will be described.
[0038]
To use the vacuum cleaner 10, a switch (not shown) is turned on to drive the electric blower 14 a to apply a suction negative pressure to the dust suction chamber 23, and then the handle body 15 of the cleaner body 11 is operated. Cleaning is performed by moving the suction port body 20 on the surface to be cleaned M.
[0039]
And when the suction inlet 20 is advanced, the suction inlet main body 21 advances as shown in FIG. At this time, the rotating body 30 corresponds to the forward direction (counterclockwise direction indicated by an arrow) by the frictional force generated between the surface to be cleaned M and the contact friction surface 31 in contact with the surface to be cleaned M. Is driven to rotate.
[0040]
Furthermore, the rotation angle of the rotating body 30 is restricted by a stopper (not shown), and the rotating body 30 is held in a state of facing the surface to be cleaned M with the recess 32 facing downward.
[0041]
Thus, a gap (substantially equal to the gap G) is formed between the recess 32 and the surface to be cleaned M, and the external space in front of the suction port body 21 and the dust suction chamber 23 are communicated with each other. And it becomes possible to fully attract the dust in front of the suction port body 20.
[0042]
Here, since the width of the contact friction surface 31 in the width direction on the outer space side is narrow, the contact area between the contact friction surface 31 on which the dust easily adheres and the surface to be cleaned M on the outer space side can be reduced. It is possible to make it difficult to attach dust.
[0043]
Further, since the negative suction pressure acting on the dust suction chamber 23 is relatively large on the dust suction chamber 23 side of the contact friction surface 31, even if dust adheres to the contact friction surface 31, this dust is sufficiently removed. Can inhale. Therefore, dust can be prevented from adhering to the contact friction surface 31.
[0044]
In addition, as the contact friction surface 31 becomes closer to the dust suction chamber 23 side, the width in the width direction becomes wider, so that the width in the width direction of the concave portion 32 provided between the contact friction surfaces 31 is the dust suction chamber 23 side. It becomes relatively narrow as it goes to.
[0045]
For this reason, the wind speed passing through the recess 32 is increased, and the dust adhering to the contact friction surface 31 is more easily separated.
[0046]
Further, since the rotating body 30 is formed so that the width in the width direction of the contact friction surface 31 on the dust suction chamber 23 side is widened, the rotating body 30 is rotated by the frictional force generated by the movement of the suction port body 21 in the front-rear direction. The moving body 30 can be prevented from being bent and deformed.
[0047]
Since the wiping member 30A is attached to the surface of the rotating body 30, a relatively large frictional force is generated between the contact friction surface 31 and the surface to be cleaned M. Therefore, the rotating body 30 can be easily rotated corresponding to the traveling direction of the suction port body 21.
[0048]
On the other hand, when the suction port body 21 is moved backward, as shown in FIG. 5, the rotating body 30 is in close contact with the surface M to be cleaned and rotates in the forward direction (clockwise direction indicated by an arrow) corresponding to the retracted direction. Driven, the recess 32 is directed forward. Also at this time, the rotating body 30 is rotationally driven in the forward direction corresponding to the backward direction by the frictional force generated between the surface to be cleaned M and the contact friction surface 31 in contact with the surface to be cleaned M.
[0049]
As a result, the lower part of the rotating body 30 is in close contact with the surface to be cleaned M, and the upper part of the rotating body 30 is close to the inner surface of the recess 28, so that the external space and the dust suction chamber 23 are blocked. And the suction negative pressure in the dust suction chamber 23 increases, and the dust suction force at the time of retracting the suction inlet main body 21 can be improved.
[0050]
In the above-described embodiment, since there are a plurality of contact friction surfaces 31 provided on the rotating body 30, the distance between adjacent contact friction surfaces 31 is shortened, and the rigidity of the entire rotating body 30 can be improved. .
[0051]
In particular, here, the contact friction surfaces 31 are provided at three central positions of the rotating body 30 and symmetrical positions that are equidistant from the contact friction surface 31 provided at the center portion with the center portion interposed therebetween. Yes.
[0052]
Thereby, the frictional force generated between the suction port body 20 and the surface to be cleaned M can be efficiently dispersed, and the rigidity of the rotating body 30 can be sufficiently secured with a small contact friction surface 31.
[0053]
Furthermore, since the contact friction surface 31 is provided only in three places, the part which the recessed part 32 occupies increases relatively, and it becomes easy to attract the dust in front of the suction inlet body 20. FIG.
[0054]
Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to the above-described embodiment. Design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.
[0055]
In the above-described embodiment, the rotating body 30 is provided in front of the suction opening 24. For example, the rotating body 40 may be provided behind the suction opening 24 as shown in FIG. That is, a recess 41 is formed behind the suction opening 24, and the rotating body 40 is rotatably disposed in the recess 41.
[0056]
Even in this case, the contact friction surface 42 is formed so that the width in the width direction becomes wider toward the dust suction chamber 23 side when contacting the surface M to be cleaned.
[0057]
Thereby, when retracting the suction inlet main body 21, a contact area with the to-be-cleaned surface by the side of the external space which dust tends to adhere can be made small, and it can make it difficult to adhere dust.
[0058]
The dust adhering to the dust suction chamber 23 side of the contact friction surface 41 can be sucked and removed by the suction negative pressure acting on the dust suction chamber 23. Therefore, it is possible to prevent dust from adhering to the contact friction surface 41 that contacts the surface to be cleaned M.
[0059]
Further, since the rotating body 40 is wide in the width direction on the dust suction chamber 23 side, even if a large frictional force acts between the suction port body 20 and the surface to be cleaned M, the rotating body 40 is bent. Can be prevented from being deformed.
[0060]
Further, as shown in FIG. 7, a pair of rotating bodies 50 a and 50 b may be provided in front of and behind the suction opening 24. That is, a front recess 51a is formed in front of the suction opening 24 and a rear recess 51b is formed in the rear, and the rotating bodies 50a and 50b are rotatable in the front and rear recesses 51a and 51b, respectively. Has been placed.
[0061]
Also in this case, the contact friction surfaces 52a and 52b provided on the rotating bodies 50a and 50b are formed so that the width in the width direction becomes wider toward the dust suction chamber 23 side. Even when a strong frictional force acts between them, sufficient rigidity can be secured to prevent the rotating bodies 50a and 50b from bending.
[0062]
And as mentioned above, it can prevent that dust adheres to the contact friction surfaces 52a and 52b of each rotation body 50a and 50b which contacts the to-be-cleaned surface M. As shown in FIG.
[0063]
In the above-described embodiment, the suction port body 20 according to the present invention is mounted on the so-called upright type vacuum cleaner 10, but it may be a canister type vacuum cleaner or the like.
[0064]
【The invention's effect】
According to the present invention, the external space and the dust suction chamber can be appropriately communicated to prevent dust from adhering to the communicating means that sufficiently sucks the dust in the front, and deformation of the communicating means can be prevented. The suction inlet body which can be provided can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an entire electric vacuum cleaner according to the present invention.
FIG. 2 is a perspective view of the bottom side of the suction port body according to the present invention.
FIG. 3 is a perspective view showing a rotating body.
FIG. 4 is a cross-sectional view of the main part showing a case where the suction port body according to the present invention is advanced.
FIG. 5 is a cross-sectional view of the main part showing a case where the suction port body according to the present invention is retracted.
FIG. 6 is a cross-sectional view of a main part showing another first example of the suction port body according to the present invention.
FIG. 7 is a cross-sectional view of a main part showing another second example of the suction port body according to the present invention.
FIG. 8A is a plan view showing a bottom surface of a conventional suction port body.
(B) It is AA sectional drawing of Fig.8 (a).
FIG. 9 is a perspective view showing a bottom surface of a conventional suction port body.
[Explanation of symbols]
20 Suction port body 21 Suction port body 23 Dust suction chamber 24 Suction opening 30 Rotating body 31 Recess 32 Contact friction surface

Claims (4)

A suction port body having a dust suction chamber therein and a suction opening to the dust suction chamber on the bottom surface;
A communication means provided in the suction port main body for appropriately communicating the external space and the dust suction chamber ;
The communication means is located at least one of the front and rear of the suction opening, and has a rotating body that extends in the width direction of the suction port body along the suction opening and is rotatably provided. ,
The rotating the body, and the contact surface to be cleaned with the movement in the front-rear direction of the suction inlet main body, the contact friction surface for rotating the rotary body by a frictional force generated between the surface to be cleaned, the A recess is provided that forms a gap with the surface to be cleaned when the rotating body rotates a predetermined angle;
The contact friction surface is provided with a wiping member, and closes the dust suction chamber and the external space in close contact with the surface to be cleaned when the rotating body rotates a predetermined angle,
The suction port body , wherein the recess is formed so that the width in the width direction becomes narrower toward the dust suction chamber side. The suction port body according to claim 1, wherein a plurality of the contact friction surfaces are provided. 3. The suction port body according to claim 1 , wherein the contact friction surface is provided at least at a central portion of the rotating body and symmetrical positions that are substantially equidistant from each other with the central portion interposed therebetween.   The vacuum cleaner provided with the suction inlet as described in any one of Claim 1 thru | or 3.

Images