JP3542287B2 - Suction port body and vacuum cleaner - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air circulation type vacuum cleaner and a suction port provided in the vacuum cleaner.
[0002]
[Prior art]
The air-circulating vacuum cleaner draws air from the suction port of the suction opening body by operating an electric blower in the cleaner body, passes the sucked air through a filter to capture dust, and passes through the filter to move the electric blower. Is returned to the air inlet, and the returned air is collected and circulated for cleaning.
[0003]
As shown in FIGS. 3 and 4 of Japanese Patent Application Laid-Open No. 9-23999, the suction port provided in this vacuum cleaner is “open” when it comes into close contact with the floor surface and “open” when it comes away. There is known an on-off valve that is "closed", that is, an on-off valve having projections at both ends through which the suction port of the suction device is inserted, and constantly biased in the closing direction by a spring.
[0004]
The suction port body is configured to suck dust from the suction port by opening the opening / closing valve, in which case the switching valve is used as a suction guide, and air is suctioned from one side of the suction port at a surface facing the suction port. It is excellent in that air blown to the other side can be guided across the mouth.
[0005]
[Problems to be solved by the invention]
However, the configuration having the suction guide as described above has the following problems. That is, when the object to be cleaned is not the floor, but a soft cleaning surface such as a sheet, a tablecloth, or a curtain having a weak waist, the portion of the soft cleaning surface facing the air inlet is sucked into the air inlet. The suction guide may be sucked on the surface of the suction guide facing the air inlet. In such a situation, the sucked portion of the soft cleaning surface blocks the flow of air passing through the suction port body, so that the air sent into this suction port body seeks a refuge, and passes through the suction port through the suction port. As the air is blown out of the body, there is a high possibility that the surrounding light dust will be blown off.
[0006]
Therefore, a first problem to be solved by the present invention is to provide a suction port body that can suppress the air from being blown out from the suction port even when the soft cleaning surface is sucked into the suction port.
[0007]
A second object of the present invention is to provide an air circulation type vacuum cleaner which can solve the first problem.
[0008]
[Means for Solving the Problems]
According to the invention of claim 1 The suction body is attached to the vacuum cleaner body A suction device provided in a vacuum cleaner that cleans dust while catching dust by passing air sucked by a built-in electric blower through a filter and collecting and circulating air discharged from the electric blower through the filter. Assume mouth.
[0009]
In order to solve the first problem, in order to solve the first problem, a suction port body main portion having a suction port for suctioning air on an outer surface facing a surface to be cleaned, and the suction port positioned at one side of the suction port. A recirculation outlet provided in the mouth body main portion and circulating air to the intake port side, and provided on the suction port body main portion located on a side opposite to the recirculation outlet port with respect to the intake port. A connection portion communicated with the cleaner body side, provided to face the air inlet during cleaning, and guides air from the return outlet to the connection portion at a surface facing the air inlet, And a suction guide having a bypass passage for the opposing surface.
[0010]
In the present invention, the air that is recirculated from the main body of the suction port to the air from the main body side of the cleaner is blown out from the recirculation outlet to the side of the air inlet, and the air is sucked into the main body of the cleaner via the connection part. Since the air is collected, the air in the suction gap between the surface to be cleaned and the outer surface of the main body of the suction port opposite to the surface to be cleaned faces the gap due to the dust suction force at the air inlet associated with the air circulation. The air can be cleaned by sucking it into the air inlet. In this air circulation type cleaning, the suction guide facing the intake port guides the air and dust that are blown out from the return outlet and collected in the connection portion by the facing surface facing the intake port, and connected. The suction of air or the like into the part can be facilitated.
[0011]
By the way, in the air circulation type cleaning, when a soft cleaning surface such as a sheet is sucked into the suction port, the sucked portion is sucked to the opposing surface of the suction guide which faces the suction port, so that the return flow is blown out. Restricts airflow from mouth to connection. However, even in this state, the bypass passage of the suction guide is not blocked, so that the flow of air from the return outlet to the connection portion can be secured through this passage.
[0012]
In practicing the first invention, the bypass passage may be formed by one or more grooves provided on the facing surface, as in the suction opening according to the second aspect of the invention. In this invention, it consists of a groove Bypass passage This is advantageous in that air flowing from the outlet through the outlet to the connecting portion faces the soft cleaning surface sucked to the opposite surface of the suction guide, and can absorb dust on the soft cleaning surface.
[0013]
Further, in carrying out the second invention, it is preferable that the groove is provided obliquely as in the suction opening according to the invention of claim 3 which depends on this invention. In the present invention, as the main body of the suction opening is moved onto the soft cleaning surface, a wide area for absorbing dust on the soft cleaning surface facing the soft cleaning surface sucked to the opposite surface of the suction guide is secured. And it is excellent in that dust can be efficiently absorbed.
[0014]
In the electric vacuum cleaner according to the fourth aspect of the present invention, the air on the surface to be cleaned is sucked from the suction port of the suction port body by the operation of the electric blower in the cleaner body, and the sucked air is passed through the filter to capture dust. Then, it is assumed that the vacuum cleaner is configured to return the air discharged from the electric blower through the filter to the suction port, collect the returned air, and perform cleaning while circulating the returned air.
[0015]
And in order to solve the said 2nd subject, the vacuum cleaner which concerns on the invention of Claim 4 WHEREIN: The said suction opening body is the suction opening body of any one of Claims 1-3. It is characterized by having done.
[0016]
Therefore, in this air circulation type vacuum cleaner, by providing the suction port according to the invention of claims 1 to 3, Claims 1-3 The function of any one of the aspects of the invention can be obtained as described above.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, a hand-held air-circulation-type vacuum cleaner 11 according to the first embodiment includes a cleaner body 12 and a suction opening 13.
[0018]
The cleaner body 12 having the handle 12a on the rear upper surface is formed by connecting a pair of upper and lower or left and right synthetic resin body cases 21 by screws or the like. A connection port 22 whose one end is exposed at the front end face inclined forward is attached to the front portion of the main body case 21. The suction port body 13 is detachably inserted into and attached to the connection port 22. The connection port 22 has a cylindrical shape with a step formed by connecting a large diameter portion and a small diameter portion, and a plurality of ventilation holes 22a are circumferentially provided on a wall surface which borders the small diameter portion and the large diameter portion. Is provided.
[0019]
As shown in FIG. 2, required partition ribs whose tips are brought into contact with each other are integrally provided on the inner surfaces of both body cases 21, and the inside of the body case 21 is provided by these ribs. A dust collection chamber 23 at the front, an exhaust chamber 24 at the middle, an reel housing 25 at the rear, and a recirculation chamber 26 at the bottom of the main body case 21 forming a return air passage extending below the dust collection chamber 23 and the exhaust chamber 24. And is divided into. The upper surface of the dust collection chamber 23 located on the front side of the exhaust chamber 24 is opened, and this opening is airtightly closed by a case lid 27 which is detachably attached to the upper front part of the main body case 21.
[0020]
As shown in FIG. 2, the front wall of the dust collecting chamber 23 is formed as a filter mounting portion 28, and the upper end of the filter mounting portion 28 is manually pivotally pivoted in the direction of the arrow in FIG. A filter holder 30 that is rotated around the center 30a is attached. The dust-collecting bag 31 made of a paper pack as a filter accommodated in the dust-collecting chamber 23 is housed in the dust-collecting chamber 23 by attaching the flat frame 31a to the filter attaching portion 28 by the filter holder 30. Have been. A filter support 32 having a large number of elongated ventilation holes is accommodated in a rear portion of the dust collection chamber 23, and the filter support 32 supports a rear surface of the dust collection bag 31 that has expanded with a cleaning operation.
[0021]
An electric blower 35 is provided in the exhaust chamber 24 with its suction port facing the dust collection chamber 23 side. Reference numerals 36 and 37 denote vibration-proof motor supporting rubbers fitted to both front and rear ends of the electric blower 35. The partitioning rib 38 located at the boundary between the exhaust chamber 24 and the dust collecting chamber 23 has an opening 38a facing the suction port, thereby passing through the dust collecting bag 31 in the dust collecting chamber 23. Air is sucked into the electric blower 35.
[0022]
The electric blower 35 includes an electric blower and a motor cover 39 described later attached to the blower. That is, as shown in FIG. 2, the electric blower includes a stator 35a, a diffuser 35c screwed to a bearing bracket 35b fixed to one end surface of an iron core of the stator 35a, and a peripheral portion of the diffuser 35c. A fan cover 35d fitted and fitted and having the suction port, a bearing bracket 35e screwed to the other end surface of the stator core, and a rotation rotatably supported over bearings respectively attached to the bracket 35b. A rotor 35f, a centrifugal fan 35g connected to one end of the rotor shaft of the rotor 35f and covered by a fan cover 35d, and a carbon brush elastically pressed against a commutator 35h of the rotor 35f. It has a pair of brush devices (not shown).
[0023]
Therefore, in the electric blower, a motor unit including components other than the blower, such as the stator 35a and the rotor 35f, is provided downstream of the blower in which the diffuser 35c and the centrifugal fan 35g are accommodated inside the fan cover 35d. It has a protruding configuration. The motor support rubber 36 is fitted on the outer peripheral surface of the fan cover 35d. A portion other than the bearing mounting portion 35i of the bearing bracket 35e has, for example, a four-column structure, and the brush device is mounted on two of the columns.
[0024]
During operation of the electric blower 35, the air in the dust collection chamber 23 sucked into the centrifugal fan 35g from the suction port is discharged from around the fan 35g, and then guided inside the diffuser 35c by the inner surface of the fan cover 35d. From the inlet of the outer peripheral portion, and flows out toward the periphery of the stator 35a of the motor portion while being made static by the diffuser 35c.
[0025]
As shown in FIG. 2, the motor cover 39 of the electric blower 35 is formed of a synthetic resin into a cup shape, and covers a portion of the electric blower downstream of the diffuser 35c on the downstream side. The cover 39 has its opening edge fitted to the outer periphery of the fan cover 35d. An end of the motor support rubber 36 on the diffuser 35c side is sandwiched between the two covers 35d and 39 to hermetically seal the gap therebetween. On the peripheral wall of the motor cover 39, for example, a thermostat (not shown) for preventing an excessive rise in temperature is attached as a temperature sensor for thermally protecting the cleaner body 12 against exhaust air from the electric blower 35. At the same time, a plurality of exhaust holes 41 (only one is shown) communicating the inside of the motor cover 39 and the exhaust chamber 24 are opened.
[0026]
The bearing mounting portion 35i of the bracket 35e penetrates a hole provided at the center of the bottom wall of the motor cover 39, and the motor support rubber 37 is fitted to the outer surface of the mounting portion 35i. The electric blower 35 having the motor cover 39 has a partition rib 45 and a partition rib 45 which form a boundary between the exhaust chamber 24 and the reel housing 25 in a state where motor support rubbers 36 and 37 are respectively fitted to both front and rear ends thereof. 38 and installed. Note that such support is provided for each of the pair of main body cases 21 as the vacuum cleaner main body 12 is assembled.
[0027]
As shown in FIG. 2, a cord reel 51 for supplying power to the electric blower 35 is accommodated in the reel accommodating portion 25. A plurality of exhaust ports 52 are provided on the rear wall of the cleaner body 12. A portion of the exhaust port 52 located on the rear wall 21a of the cleaner body 12 is used as a leg when the cleaner body 12 is placed on the floor with the rear wall 21a down. Is opened to the leg projection 53 projecting from the outer surface of the leg. The exhaust port 52 and the exhaust chamber 24 communicate with each other via a tunnel-shaped exhaust path (not shown) formed along the outer surface of the cord reel 51. This exhaust path is effective to prevent the exhaust of air from the cord passage portion (not shown) of the main body case 21 through which the power cord of the cord reel 51 passes. In the air circulation type vacuum cleaner in which the exhaust chamber 24 and the reel accommodating chamber 25 are completely separated by ribs or the like, the air can be exhausted from the cleaner body 12 to the outside. Can be omitted.
[0028]
As shown in FIG. 2, a rectangular cylindrical air outlet 55 having a much larger opening area than that of the exhaust through hole 41 is integrally formed on the periphery of the motor cover 39, and projects downward. Is fitted with a rubber packing 56. The air outlet 55 is airtightly connected to a hole 58 provided in a partition rib 57 for partitioning the reflux chamber 26. Therefore, the inside of the motor cover 39 and the rear end of the cleaner body 12 in the recirculation chamber 26 are communicated via the air outlet 55.
[0029]
Reference numeral 59 in FIGS. 1 and 2 denotes a switch for turning on / off the energization of the electric blower 35. The reference numeral 60 designates the vacuum pressure in the dust collection chamber 23 located on the suction side of the electric blower 35. From a given value It is a leak valve that opens when it goes down and introduces outside air into the dust collection chamber 23.
[0030]
Next, the suction port 13 will be described with reference to FIGS. The suction port body 13 includes a connection pipe 101 as a connection portion connected to the cleaner body 12 side, a suction port body main portion 102, a return outlet 103, and a wind direction control body 104 as a wind direction changing unit. Each part other than the spring described later is a molded product of a synthetic resin.
[0031]
As shown in FIGS. 8 and 9, a connection pipe 101 which is detachably inserted into the connection port 22 and communicated with the cleaner body 12 side includes an inner connection pipe 105 having both ends opened, And an outer connecting pipe 106 provided integrally and coaxially with the outer connecting pipe 106.
[0032]
The cylindrical inner connection pipe 105 longer than the outer connection pipe 106 is inserted into the small diameter portion of the connection port 22 and is made of a rubber seal valve (not shown) of the port frame 31 a or the dust collection chamber 23 of the connection port 22. A rubber seal valve (not shown) fitted to the side end is pushed open to guide air containing dust into the dust bag 31. A pair of upper and lower stopper protruding edges 107 and 108 protrude outward from an opening edge of a distal end portion of the inner connecting pipe 105 protruding outside the main body case 21.
[0033]
The outer connection pipe 106 is inserted into the large diameter portion of the connection port 22, and forms a return air introduction port 106 a between the outer connection pipe 106 and the inner connection pipe 105 at one axial end. A pair of left and right return air outlets 106b are formed at the other end in the axial direction of the outer connection pipe 106 at right angles to the axial direction and open toward each other outward. The peripheral wall of these return air outlets 106b forms an annular pivot cylinder portion 109, and a flange 110 that is continuous in the circumferential direction is integrally protruded from the outer peripheral surface of the cylinder portion 109. An airtight seal member 111 such as an O-ring made of synthetic rubber is attached to the outer peripheral surface of the outer connection pipe 106 on the side of the return air introduction port 106a. In the drawing, reference numeral 112 denotes a claw integrally projecting from the outer connection pipe 106.
[0034]
As shown in FIG. 2, the connection pipe 101 is inserted until the outer connection pipe 106 hits a wall surface of the connection port 22 where the ventilation hole 22 a is opened. The airtight seal 111 secures airtightness between the inner surface and the inner peripheral surface, and is rotated in the circumferential direction in this state. It is attached to the main body case 21 by being hooked on the wall surface having the pores 22a. The hook 112 prevents the suction port body 13 from coming off the connection port 22 and prevents the return chamber 26 from being connected to the outside connection pipe. 106 Is communicated with the inside through the return air introduction port 106a and the ventilation hole 22a which is close to and opposed to the return air introduction port 106a.
[0035]
As shown in FIGS. 3 and 4, the suction opening main body 102 is formed by fitting the main upper case 121 and the main lower case 122 to each other and connecting them with screws 120. A pair of bearing plates 123 and 124 made of ribs having semicircular recesses are integrally provided on the rear inner surfaces of the upper and lower cases 121 and 122, respectively. Each is rotatably supported by being sandwiched from above and below. With this support structure, the connection pipe 101 is pivotally attached to the rear part of the suction port body main part 102 so as to be turned up and down in a vertical direction. Thus, the suction port main body 102 can be obtained in a proper posture. The vertical rotation of the suction port main body 102 with respect to the connection pipe 101 is regulated by the stopper projections 107 and 108, and at this time, the mating surfaces of the flange 110 and the bearing plates 123 and 124 are formed. Are slid in contact. In FIG. 8, P indicates the center of rotation of the connection pipe 101 and the main body 102 of the suction port.
[0036]
As shown in FIG. 8, the inside of the suction port main body 102 is surrounded by a recovery chamber 127 communicating with the inner connecting pipe 105 by a partition 125 and a middle partition 126 which are continuous with each other, and surrounds the recovery chamber 127 except for an opening on the lower surface thereof. It is partitioned into a blowing chamber 128. As shown in FIG. 4 and the like, the partition 125 is formed of a rib integrally projecting over a pair of left and right bearing plates 123 at the center in the width direction of the inner surface of the main part upper case 121. Facing. The recovery chamber 127 is communicated with an intake port 129, and the outlet chamber 128 is communicated with the return air outlet port 106b. The air inlet 129 is provided in the bottom wall 122 a of the main lower case 122 facing the surface to be cleaned.
[0037]
The middle partition 126 is made of a synthetic resin plate molded separately from the upper and lower cases 121 and 122, and is disposed over substantially the entire width of the front portion of the suction opening main body 102 in the width direction. The upward rear edge formed at the center of the middle partition 126 is fitted into the lower edge of the partition 125 asperities, and the downward rear edges on both sides of the upward rear edge are formed in the main lower case 121. The upper and lower edges are fitted into the partitioning edge from above.
[0038]
In order to separate the two chambers 127 and 128 from each other, it is necessary to integrally form a portion corresponding to the partition 126 into one of the main upper and lower cases 121 and 122. Therefore, it is excellent in that the structure of these molds can be simplified and the molding can be facilitated, and between the lower edge of the partition 126 and the inner surface of the front edge portion 122b of the bottom wall 122a. When the size or the like of the formed return outlet 103 needs to be changed in a minor change or the like, it is excellent in that it can be easily handled by replacing the middle partition 126. Further, as shown in FIG. 10 and the like, a wind-shielding convex portion 126a made of a rib or the like protrudes from a rear surface at a central portion in the longitudinal direction of the partition 126. In FIG. 4, reference numeral 121a denotes a boss which is integrally provided on the inner surface of the main case 121 to press and fix the partition 126 from above.
[0039]
The reflux outlet 103 is formed at one side (the front side in the present embodiment) of the recovery chamber 127, and is returned from the outlet 103 into the outlet chamber 128 to guide the partition 126 and the main upper case 121. Is discharged toward the collection chamber 127 side. In FIGS. 3 and 6 to 8, reference numeral 131 denotes a first downward brush bristle which is implanted as a spacer means around the bottom wall 122 a except for a front edge portion 122 b thereof. Are flexible and form a predetermined narrow suction gap between the surface to be cleaned and the air inlet 129.
[0040]
At the bottom of the suction port main body 102, the wind direction control body 104 for controlling the magnitude of dust suction generated at the suction port 129 by changing the blowing direction of the air blown from the recirculation blow port 103 is attached. Have been.
[0041]
That is, as shown in FIGS. 3, 6 to 8, etc., the wind direction control body 104 controls the wind direction control plate 142 as a suction guide by the front frame of the control body 141 formed of a synthetic resin in a frame shape. The second brush bristles 143 are formed on the rear frame portion so as to protrude downward as a detection portion for detecting the surface to be cleaned. The second brush bristles 143 provided behind the suction port 129 and the rotation center P and corresponding to the longitudinal center portion of the recirculation outlet 103 are not limited to this, but the suction port body is not limited thereto. The first brush bristle extends in the width direction of the main portion 102 and is densely continuous. 131 It has a longer projecting length downward and is softer. Pivot parts 144 are integrally formed on both side frame parts of the control body 141, respectively.
[0042]
Second brush bristles 143 Is attached directly below the inlet 105c of the inner connection pipe 105, and the length of the main body portion 102 extending in the width direction is longer than the maximum opening width of the inlet 105c in the left-right direction. In particular, in the present embodiment, the length is slightly longer than the distance between the tips of the pair of pivot cylinder portions 109, and thereby the second brush bristles are formed. 143 Crosses the expected path of the air that is going to blow through to the rear of the inlet body main part 102. The second brush bristles arranged as described above 143 When there is no suction port body 13, since the suction port body 13 has a pair of pivot cylinder portions 109 forming the return air outlet port 106 b, the air blowing from the suction port 129 is limited to the central portion in the width direction of the suction port body main portion 102. In the suction gap, and blows directly under the inlet 105c of the connection pipe 105.
[0043]
As shown in FIG. 8, the wind direction control plate portion 142 has a relatively steeply angled wind direction changing slope portion 142a that is inclined obliquely rearward toward the lower side at the front end thereof. And a wind guide portion 142b projecting rearward from the inclined lower end of the portion 142a. In particular, the central portion in the longitudinal direction of the wind guide portion 142b, that is, the central portion facing the inlet 105c facing the air inlet 129 of the inner connection pipe 105 is projected toward the inlet end 105c, and the rear end is It is curving upward in an arc shape. Providing such a wind guide portion 142b is excellent in that air blown out from the recirculation outlet 103 can be smoothly guided toward the inlet 105c, and that wind loss due to vortices can be reduced.
[0044]
The wind direction control plate portion 142 as a suction guide faces the air inlet 129, and an opposing surface 142bf (see FIG. 3) facing the air inlet 129 is provided with one or more bypass passages 145 for the surface 142bf. I have. As shown in FIG. Bypass passage 145 is formed, for example, on the lower surface of the central portion of the wind guide portion 142b by a groove between a plurality of adjacent rib-shaped bulging portions 146 provided diagonally with respect to the front-rear direction of the suction port main body 102. I have. Therefore, consisting of this groove Bypass passage 145 is also provided diagonally like the rib-shaped bulging part 146.
[0045]
On the other hand, on the outer surface of the bottom wall 122a of the main part lower case 122, as shown in FIG. 6 and the like, recesses 151 communicating with the intake ports 129 are formed at both ends in the width direction of the main part lower case 122. The recess 151 is formed of a groove having a shape slightly larger than the shape of the control body 141 excluding the front frame portion. A pair of bearing portions 153 each having a bearing hole 152 in the bottom wall 122a facing the recess 151 are provided. Each is formed. The wind direction control body 104 is rotatably attached to the pair of pivot portions 144 by fitting the pair of pivot portions 144 into the bearing holes 152 of the bearing portion 153, respectively.
[0046]
When the wind direction control body 104 is attached to the main part lower case 122, the second brush bristles 143 always protrude from the outer surface of the bottom wall 122a. A pair of left and right springs 154 as urging members are interposed between the rear frame portion of the wind direction control body 104 and the bottom wall 122a, and the second brush bristles are urged downward by the springs 154. When 143 is not in contact with the surface to be cleaned, the wind direction control body 104 is inclined and is held at the second control position shown in FIG.
[0047]
In FIGS. 3 and 6 to 8, reference numeral 155 denotes a third brush bristle having flexibility, which is close to the rear side of the second bristles 143 and is implanted on the outer surface of the bottom wall 122a. 155 is provided with the same protruding height and strength as the first brush bristles 131. The provision of the brush bristles 155 is such that when the suction opening 13 is brought into contact with the surface to be cleaned, the pressing force of the suction opening 13 against the surface to be cleaned is received together with the first brush bristles 131, and the second brush bristles 143 are received. It is excellent in that it can prevent excessive deformation. Reference numeral 156 shown in FIGS. 3, 6 to 8, and the like is a velvet-shaped flat cleaning body brushed obliquely toward the front side, which is located immediately behind the intake port 129 and attached to the outer surface of the bottom wall 122 a. I have. The cleaning body 156 captures dust when the suction port body 13 moves forward, and releases the already captured dust when retracting.
[0048]
Next, the operation of the air circulation type vacuum cleaner 11 having the suction port 13 having the above configuration will be described. As shown in FIG. 2, the vacuum cleaner 11 is connected to the connection port 22 of the cleaner body 12 with the connection pipe 101 of the suction opening body 13 inserted thereinto. Power is supplied to the electric blower 35 via the power cord unwound from the code reel 51 while the user is holding the air blower 35 to operate the blower 35.
[0049]
In this use, the dust contained in the suction air (indicated by the dotted arrow in FIGS. 2 and 8) flowing into the dust collection bag 31 through the inner connection pipe 105 of the suction port body 13 is transferred to the dust collection bag 31. The air that has been captured and passed through the dust bag 31 is further passed through the filter support 32 and is sucked into the electric blower 35, and then discharged through the air outlet 55 of the motor cover 39 to the reflux chamber 26. Some of them are discharged to the exhaust chamber 24 through the exhaust holes 41.
[0050]
The exhaust gas thus flowing into the recirculation chamber 26 is introduced into the outer connection pipe 106 of the connection pipe 101 from the ventilation hole 22 a of the connection port 22, and is discharged from the pair of return air outlets 106 b of the outer connection pipe 106 to the suction port main body. After being led out to the outlet chamber 128 of the part 102, the air is blown from the recirculation outlet 103 to the inlet 129 side, in other words, to the collection chamber 127 where the inlet 105 c of the inner connecting pipe 105 of the connecting pipe 101 faces, and is connected to the inner side. It is sucked into the cleaner body 12 through the pipe 105. Such a flow of air is indicated by solid arrows in FIGS. As the air discharged from the electric blower 35 is collected and circulated by the suction port body 13 as described above, dust in the suction gap between the bottom wall 122a of the suction port body 13 and the surface to be cleaned is generated by the force. The air is sucked into the intake port 129 together with the air, so that the air circulation cleaning can be performed.
[0051]
During such cleaning, a part of the air in the motor cover 39 passes through the exhaust holes 41 as described above, so that the exhaust chamber 24 is filled with exhaust gas. The exhaust gas thus filled in the exhaust chamber 24 is discharged to the outside of the cleaner main body 12 from an exhaust port 52 formed in the rear wall 21a of the cleaner main body 12 through an exhaust path (not shown).
[0052]
Next, the operation of the wind direction control body 104 during cleaning will be described.
[0053]
When the suction opening body 13 is separated from the surface to be cleaned, the wind direction control body 104 is held at the second control position shown in FIG. In the second control position, the wind direction control plate portion 142 of the wind direction control body 104 is located above the reflux outlet 103 in the collection chamber 127, so that the air blown backward from the reflux outlet 103 is controlled by the wind direction. The air is blown rearward in a direction other than the surface to be cleaned, for example, substantially parallel to the surface to be cleaned, without being hit against the slope portion 142a forming the front end of the plate portion 142. In other words, the air is blown toward the inlet 105c side of the inner connection pipe 105 so as to form an air flow substantially parallel to the surface to be cleaned that does not go downward from the intake port 129, and is sucked into the inner connection pipe 105.
[0054]
In this manner, the air blown out and collected substantially parallel to the surface to be cleaned flows while spreading somewhat, but does not blow out to the outside through the air inlet 129. The dust-absorbing force generated in the intake port 129 by the force of the air collected in the inner connection pipe 105 is smaller than that in a case where the wind direction control body 104 is disposed at a first control position described later. Further, the momentum of the air collected as described above is lower than that in the case where the wind direction control body 104 is disposed at the first control position, which will be described later. Driving with noise.
[0055]
Further, when the suction opening body 13 is pressed against the surface to be cleaned, the second brush bristles 143 as the surface to be cleaned detection portion of the wind direction control body 104 come in contact with the surface to be cleaned and receive a pushing force. The wind direction control body 104 is rotated about the pivot 144 against the urging force of the 104 Is located at the first control position shown in FIG. Although the second brush bristles 143 are flexible, they are dense and provided in a belt-like shape, so that the second brush bristles 143 can transmit the pushing force of the surface to be cleaned.
[0056]
Wind direction control body in first control position 104 The wind direction control plate portion 142 is disposed so as to approach the intake port 129 side and face the slope portion 142 a to the recirculation outlet 103. Therefore, the air blown rearward from the return outlet 103 blows against the slope portion 142a of the wind direction control plate portion 142 and is guided obliquely downward, and is blown downward from the inlet 129 to be cleaned on the surface to be cleaned. The light is reflected and sucked into the collection chamber 127 again from the suction port 129 together with the air in the suction gap between the bottom wall 122a and the surface to be cleaned, and subsequently sucked into the inner connection pipe 105.
[0057]
In this case, the gap between the slope portion 142a of the wind direction control plate portion 142 and the recirculation outlet 103 is narrowed, so that the flow velocity of the air blown toward the surface to be cleaned through the intake port 129 increases. Therefore, it is possible to obtain an effect of digging dust from a surface to be cleaned such as a carpet, and to blow up relatively heavy dust on the surface to be cleaned. In other words, due to the good momentum of the air collected from the return outlet 103 to the inner connecting pipe 105, the dust suction force at the inlet 129 is reduced to the second control position shown in FIG. It is larger than the case where 104 is arranged.
[0058]
In a state in which the suction port main body 102 is lightly pressed against the surface to be cleaned, the first and third brush bristles 131 and 155 serve as stoppers, and the suction gap equal to the protruding length is formed. When the suction port main body 102 is pressed more strongly against the surface to be cleaned as necessary from this stage, the brush bristles 131 and 155 are accompanied by flexible deformation. The suction gap can be made smaller.
[0059]
or, Wind direction control body 104 In the air-circulation type cleaning when is located at any of the above-described control positions, the wind direction control plate portion 142 facing the intake port 129 causes the return surface to flow out by the facing surface 142bf facing the intake port 129. It is needless to say that the air and dust blown out from the opening 103 and collected in the inner connecting pipe 105 of the connecting pipe 101 can be guided to smoothly suck the dust into the inner connecting pipe 105. Consisting of grooves Bypass passage 145 is advantageous in that air flowing along the wind direction control plate 142 can be rectified.
[0060]
Next, a case in which the vacuum cleaner 11 cleans freely deformable soft cleaning surfaces such as sheets and table cloths will be described. This cleaning is performed in the same manner as a normal floor cleaning, but in this case, a part of the soft cleaning surface may be sucked into the air inlet 129. When such a situation is reached, the sucked soft cleaning surface is brought closer to the intake port 129 side and adheres to the lower surface of the wind direction control plate 142 arranged at the first control position. The flow of air from the reflux outlet 129 to the inlet 105c of the inner connection pipe 105 of the connection part 101 is prevented.
[0061]
However, the wind direction control plate portion 142 has a bypass passage 145 on the lower surface thereof, and this passage 145 is not blocked even when the soft cleaning surface is sucked into the intake port 129. Therefore, even in the above state, the flow of air in the suction opening body 13 is not interrupted by the soft cleaning surface sucked between the suction opening 129 and the wind direction control plate 142, and the return air outlet through the bypass passage 145. An air flow from 103 to the inlet 105c of the inner connection pipe 105 can be secured. Therefore, it is possible to prevent the air sent into the suction port body 13 from blowing out below the front part of the suction port body 13 through the suction port 129 in search of an escape place, and to blow off light dust around the air port. Can be prevented.
[0062]
Further, since the air can be circulated in the suction opening body 13 through the bypass passage 145 as described above, the action of sucking the soft cleaning surface sucked into the suction port 129 is also reduced. , The suction opening 13 can be relatively easily cleaned by sliding the suction opening 13 along the soft cleaning surface. By providing the bypass passage 145 formed of a groove substantially in parallel with the moving direction of the suction opening 13, the resistance can be reduced and the movement of the suction opening 13 can be made easier.
[0063]
In addition, when the suction opening body 13 is slid along the soft cleaning surface for cleaning as described above, the bypass passage 145 formed of a groove faces the soft cleaning surface sucked into the suction opening 129, so that the bypass passage is formed. Air circulating through 145 can provide dust suction on the soft cleaning surface. Furthermore, in this case, it consists of a groove Bypass passage 145 are provided diagonally with the bulging portion 146 (note that a plurality of 145 are provided as shown in FIG. 7). Bypass passage 145 is inclined toward the inlet 105c of the inner connection pipe 105 in the opposite directions so as to form a C-shape.) Then, the suction port body 13 is When cleaning by sliding along the soft cleaning surface, Bypass passage The movement locus of the soft cleaning surface 145 can be enlarged. In other words, it is possible to secure a wide area for absorbing dust on the soft cleaning surface facing the soft cleaning surface, which is advantageous in that dust can be efficiently absorbed.
[0064]
Also, as mentioned above Bypass passage When 145 is functioning effectively, the vacuum pressure in the recovery chamber 127 increases in accordance with the suction force spread to the inner connection pipe 105 due to the air path resistance of the soft cleaning surface sucked into the suction port 129, so The air blown out from the outlet 103 passes through a slight gap between the wind direction control plate 142 and the middle partition 126 and a gap between the wind direction control plate 142 and the middle partition 126 (part of the collection chamber 127). ) Without being passed through the intake port 129 side (this air flow is referred to as a back side bypass flow). If the amount of air suction into the collection chamber 127 by such a back side bypass flow is large, Bypass passage The amount of air passing through 145 decreases, resulting in reduced cleaning performance.
[0065]
However, the inner surface of the middle partition 126 is provided with a wind-shielding convex portion 126a protruding from the rear surface side of the wind direction control plate portion 142, and the convex portion 126a narrows the flow path cross-sectional area of the back-side bypass flow. The amount of air sucked into the recovery chamber 127 by the flow can be suppressed. for that reason, Bypass passage A large amount of air passing through 145 is ensured, and it is possible to prevent a decrease in dust absorption performance.
[0066]
In order to reduce the flow path cross-sectional area of the back side bypass flow, the wind shielding convex portion 126 a may be provided on the back surface of the wind direction control plate portion 142 so as to protrude toward the inner surface side of the partition 126. Alternatively, it can be provided on both the back surface of the wind direction control plate portion 142 and the inner surface of the middle partition 126. In this case, the two wind shielding convex portions 126a can be arranged such that their tips face each other, or they can position each other. It can also be provided shifted back and forth.
[0067]
In the suction port body 13 of the present embodiment, the second brush bristles 143 serving as a surface-to-be-cleaned detection section extending continuously in the width direction of the suction port body main portion 102 serve as the suction port during cleaning. When air is blown out from the 129, it can be used as a windbreak wall against the air. That is, when the main body 102 of the suction opening is brought into contact with or separated from the surface to be cleaned such as a floor, the air is blown toward the surface to be cleaned through the air inlet 129 by temporarily blowing against the wind direction control plate 142. In this situation, since the second brush bristles 143 are in contact with the surface to be cleaned, the brush bristles 143 can block the air flowing backward along the surface to be cleaned. Thus, it is possible to prevent air from blowing from the second brush bristles 143 to the rear of the suction port main body 102 and scattering of dust on the surface to be cleaned.
[0068]
Moreover, the second brush bristles 143 having flexibility can be flexibly deformed so that only the portions of the second brush bristles 143 escape the steps or the like in a situation where the steps or the projections of the surface to be cleaned partially contact the same. Irrespective of the contact of the second brush bristles 143 with a step or the like protruding from the bottom, the entire brush bristles 143 are not pushed and moved, and the surface to be cleaned and the bottom wall 122a of the suction port main body 102 opposed thereto. Until a suction gap S of an appropriate size is formed with the outer surface, even if there is a step or the like on the surface to be cleaned. Wind direction control body 104 can be held at the second control position, and accordingly, a large dust-absorbing force is not generated in the intake port 129. Therefore, even if the balance of the circulating air is lost, a part of the circulating air is blown out of the main body 102 of the suction port through the air inlet 129 to blow off dust and the like on the surface to be cleaned. Can be suppressed.
[0069]
The present invention is not limited to the above embodiment. For example, Bypass passage May be formed by a tunnel-shaped wind tunnel provided independently of the lower surface (the surface facing the air inlet) on the wind direction control plate portion instead of the groove.
[0070]
Furthermore, in the present invention, the suction guide may open and close the suction port, and may not move toward or away from the suction port with the contact or separation with the surface to be cleaned as in the above-described embodiment. It may be provided in an impossible manner.
[0071]
Further, in the present invention, the connection portion may be provided so as not to rotate with respect to the main portion of the suction port body. In the present invention, Wind direction control body May be omitted, and the present invention can be applied to a canister-type air-circulating vacuum cleaner.
[0072]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
[0073]
According to the suction port body according to the first to third aspects of the present invention, the suction guide that guides the flow of the air from the return outlet to the connection portion is provided with a soft cleaning surface such as sheets through the suction port. Even if it is attached, the flow of air from the return outlet to the connection portion can be secured through the bypass passage of the suction guide, so that air can be prevented from being blown out from the inlet.
[0074]
According to the air circulation type vacuum cleaner according to the fourth aspect of the present invention, since the suction port according to any one of the first to third aspects is provided, the first problem can be solved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the entirety of a hand-held air circulation type vacuum cleaner according to a first embodiment of the present invention, in which a cleaner body and a suction port are separated.
FIG. 2 is a vertical sectional side view showing the entire vacuum cleaner shown in FIG. 1 in a state where a suction opening is connected to a vacuum cleaner main body.
FIG. 3 is a perspective view showing a suction opening of the vacuum cleaner shown in FIG. 1 as viewed from a lower surface side;
FIG. 4 is an exploded perspective view showing the configuration of the suction port shown in FIG. 3;
FIG. 5 is a perspective view showing the configuration of the suction opening shown in FIG. 3 with its main part upper case removed and a part cut away.
6 is an exploded perspective view showing a main case lower case of the suction opening body shown in FIG. 3 and a wind direction control body pivotally attached thereto.
FIG. 7 is a bottom view showing the suction port shown in FIG. 3 with its connection pipe removed;
FIG. 8A is a longitudinal sectional side view showing the configuration of the suction opening body shown in FIG. 3 in a state separated from a surface to be cleaned.
FIG. 4B is a vertical sectional side view showing a configuration of the suction port body shown in FIG. 3 in a state in which the configuration is brought into contact with a surface to be cleaned;
9A is a side view showing a configuration of a connection pipe provided in the suction port shown in FIG. 3; FIG.
FIG. 9B is a cross-sectional view taken along line WW in FIG.
10 is a perspective view showing a configuration of a middle partition of the suction opening body shown in FIG. 4 when viewed from the back side thereof.
[Explanation of symbols]
11 ... vacuum cleaner,
12 ... vacuum cleaner body,
13 ... suction body,
31 ... Dust collection bag (filter),
35 ... Electric blower,
101 ... connection pipe (connection part),
102: main part of the suction body
103 ... reflux outlet,
105 ... inner connection pipe,
105a: entrance of inner connecting pipe,
122a ... bottom wall,
127 ... collection room,
128 ... blowing room,
129 ... inlet,
142 ... wind direction control plate (suction guide)
142b ... wind guide part,
142bf: facing surface,
145 ... Bypass passage .

Claims (4)

An electric vacuum cleaner that captures dust by passing air sucked by an electric blower incorporated in a cleaner body through a filter, collects air discharged from the electric blower through the filter, and performs cleaning while circulating. In the suction port body provided in,
A suction port main body having a suction port for suctioning air on an outer surface facing the surface to be cleaned;
A recirculation outlet that is located at one side of the intake port and that circulates air that is provided in the intake port body and that circulates toward the intake port side;
A connection portion which is provided on the suction port body main portion and located on the side opposite to the recirculation outlet with the suction port as a boundary and communicates with the cleaner body side;
A suction guide that is provided to face the intake port during cleaning, guides air from the return outlet to the connection portion on a surface facing the intake port, and has a bypass passage for the facing surface;
A suction mouth body comprising: The suction port body according to claim 1, wherein the bypass passage is formed by one or more grooves provided in the facing surface. The suction opening body according to claim 2, wherein the groove is provided obliquely. The operation of the electric blower in the cleaner body sucks air on the side to be cleaned from the suction port of the suction opening body, captures dust by passing the sucked air through a filter, and passes through the filter from the electric blower. In a vacuum cleaner that returns the discharged air to the suction port and performs cleaning while collecting and circulating the returned air,
A vacuum cleaner, wherein the suction opening is the suction opening according to any one of claims 1 to 3.

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