JP5380160B2 - Suction port and vacuum cleaner - Google Patents

Description

  The present invention relates to a suction port body having a rotating body unit attached to a case body and a vacuum cleaner including the same.

  Conventionally, a floor brush as a suction port used in a vacuum cleaner includes a horizontally long case body and a connecting pipe that is rotatably connected to a rear portion of a central region in the left-right width direction of the case body. Yes. A horizontally long suction port is formed as an opening on the lower surface of the case body that faces the floor surface to be cleaned. Also, on both sides of the case body, large-diameter running wheels, which are rotating body units, are rotatably attached to smooth the climbing of steps such as sills and carpets and improve the running performance on the floor surface. It has been. These traveling wheels are configured such that a wheel portion, which is an annular rotating body portion having flexibility, is attached to an outer peripheral portion of a relatively hard traveling wheel main body. And these traveling wheels are arrange | positioned so that the front end side may protrude a little forward from the front part of a case body (for example, refer patent document 1).

Japanese Patent Laid-Open No. 11-178758 (page 4, FIG. 1)

  However, the floor brush described above has a problem that when traveling toward an obstacle such as a wall, the front part of the traveling wheel collides with the obstacle before the case body and receives a large impact. doing.

  In this regard, although it is conceivable to improve the shock-absorbing property by increasing the thickness of the wheel part on the outer periphery of the traveling wheel and making the wheel part softer, in the case of such a configuration, the floor brush There is a problem that the wheel portion of the traveling wheel sinks due to the weight of the vehicle and the traveling performance may be deteriorated.

  This invention is made | formed in view of such a point, and it aims at providing the suction inlet body which improved the buffering property, without reducing running property, and a vacuum cleaner provided with the same.

The present invention provides a rotating body unit having a plurality of shaft portion restricting portions , rotatably supported by a case body, a plurality of holes through which the shaft portion restricting portions can be inserted, and these A rotating body that is located between the holes and has a rotating body restricting portion that restricts the position of the shaft portion in the axial direction by contacting the shaft restricting portion, and at least a part of the rotating body is located around the shaft portion And a biasing means disposed in each of the holes and interposed between the shaft portion and the rotating body portion and biasing the rotating body portion against the shaft portion.

In addition, the present invention provides a rotating unit in which a rotating unit is rotatably supported by a case body, and at least a part of the rotating body unit is positioned around the shaft part, and a front part projects forward from the case body. A body portion and an urging means interposed between the shaft portion and the rotating body portion and biasing the rotating body portion in the entire circumferential direction with respect to the shaft portion. By being pressed against the object, the case body can be moved relative to the shaft portion to a position where the case body relatively approaches the obstacle and the surface to be cleaned against the urging force of the urging means.

According to the present invention, the axial position of the shaft portion that is rotatably supported by the case body and the rotating body portion at least partially positioned around the shaft portion is regulated, and the shaft portion and the rotation portion are rotated. each of the plurality of holes of the hand rotating body between the body portion, by interposing a biasing means for biasing the rotary body relative to the shaft portion, when the rotating body collides with an obstacle The rotator moves while being urged by the urging means and absorbs the impact, so that, for example, the rotator is softened without lowering the running performance. The buffer property can be improved and the rotating body unit can be easily assembled .

Further, according to the present invention, between the shaft portion rotatably supported by the case body and the rotating body portion at least partially positioned around the shaft portion, the rotating body portion is disposed with respect to the shaft portion. Urging means for urging in the entire circumferential direction is interposed, and the case body is relatively moved against the urging force of the urging means by pressing the rotating body portion against the obstruction at the front portion. When the rotating body collides against an obstacle, the rotating body is urged by the urging means so that the rotating body can be moved relative to the shaft up to a position approaching the cleaning surface. Therefore, the shock absorber can be improved and the vicinity of the obstacle can be efficiently cleaned without lowering the running performance by, for example, softening the rotating body portion.

The rotary body unit of the suction inlet body of the 1st Embodiment of this invention is shown, (a) is sectional drawing in the position equivalent to AA of FIG. 6, (b) is BB of FIG. It is sectional drawing in the position corresponding. It is a disassembled plan view which shows the state before an assembly of a rotary body unit same as the above. It is a top view which shows the state which inserted the axial part of the rotary body unit same as the rotary body part. It is a top view which shows the state which rotated the axial part same as the above with respect to the rotary body part. It is a top view which shows the state which attached the biasing means between the shaft part same as the above, and a rotary body part. It is a perspective view which shows a rotary body unit same as the above. It is a longitudinal cross-sectional view which shows a suction inlet same as the above. It is a side view which shows operation | movement in the vicinity of an obstruction of a suction inlet same as the above in order of (a) thru | or (c). It is a side view which shows the operation | movement at the time of earthing | grounding to the running surface of a suction inlet body same as the above. It is a top view which shows a suction inlet same as the above. It is a perspective view which shows the vacuum cleaner provided with the suction inlet same as the above. It is a side view which shows the rotary body unit of the 2nd Embodiment of this invention. It is a side view which shows the suction inlet of the 3rd Embodiment of this invention. It is a top view which shows a suction inlet same as the above. It is a top view which shows operation | movement in the obstacle vicinity of the principal part of a suction inlet same as the above. It is a perspective view which shows the vacuum cleaner provided with the suction inlet same as the above.

  Hereinafter, the configuration of the first embodiment of the present invention will be described with reference to FIGS.

  In FIG. 11, reference numeral 11 denotes a vacuum cleaner. The vacuum cleaner 11 is configured to collect dust sucked together with intake air generated by driving the electric blower 13 housed in the cleaner body 12. To collect.

  The vacuum cleaner main body 12 houses a main body control circuit (not shown) as a main body control means for controlling the operation of the electric blower 13, and a main body suction port 14 for sucking air from the outside is opened at the front. ing. The main body suction port 14 is connected to a flexible and bendable elongated substantially cylindrical hose body 15 in communication. At the tip of the hose body 15, a hand operation unit 16 that can select an operation mode of the electric blower 13 is provided. The hand operating unit 16 is provided with a gripping part 17 that is gripped by an operator when cleaning, and projects a predetermined signal to the main body control circuit to clean the gripping part 17. A plurality of setting buttons 18 for setting the electric blower 13 and the like in the machine main body 12 to a plurality of operation modes are provided.

  Further, an elongated, substantially cylindrical extension tube 19 that can be extended and retracted is detachably connected to the tip of the hand operation unit 16. That is, the extension pipe 19 is connected to the suction side of the electric blower 13 through the hose body 15. In addition, at the tip of the extension pipe 19, for example, a suction port that is placed on a carpet or the like on the floor surface F (FIG. 8), which is a traveling surface as a room to be cleaned, and sucks dust on the carpet. A floor brush 20 as a body is detachably connected. Therefore, the floor brush 20 is connected to the suction side of the electric blower 13 through the extension pipe 19, the hose body 15, and the main body suction port. The electric blower 13, the main body control circuit, and the like are each configured to be supplied with power from a commercial AC power source or a secondary battery.

  As shown in FIGS. 7 to 11, the floor brush 20 includes a horizontally long case body 21 serving as a suction port body, a connecting pipe 22 rotatably connected to a rear portion of the case body 21, and a case. A traveling wheel 23 as a rotating body unit disposed on both sides of the body 21 and a front cover 25 disposed on the front portion of the case body 21 are provided.

  The case body 21 covers the lower case 26 whose upper side is opened, the middle case 27 mounted on the lower case 26, and the upper side of the lower case 26 and the middle case 27. The lower case 26 and the middle case The upper case 28 that rotatably holds the connection pipe 22 between the upper case 28, the front case 29 attached to the front side of the upper case 28, and the lower case 26, the upper case 28, and the front case 29 And a bumper 30 as a buffer member. Further, the case body 21 is provided with a drive source that is an electric part as a drive means (not shown), that is, a motor, and a rotating brush 32 as a rotary cleaning body rotated by the motor.

  In the lower case 26, a horizontally-long rectangular suction port 35 into which the rotary brush 32 is fitted is cut out at the front end.

  The middle case 27 is disposed at the rear part of the lower case 26 and is integrally fixed on the lower case 26.

  Further, the front case 29 is formed with a front-side suction port 36 having a horizontally long rectangular shape at the front end portion. The front suction port 36 is formed continuously with the suction port 35 and is fitted with the front cover 25.

  The bumper 30 is formed of an elastic member such as an elastomer or rubber, and is continuously arranged from both sides of the case body 21 to the rear part.

  Further, the motor can rotate forward and backward, and its drive is controlled by a control circuit (not shown).

  The rotating brush 32 has a plurality of cleaning members 38 (FIG. 8) attached around a substantially cylindrical rotating brush assembly 37 as an attaching member.

  Here, the rotating brush assembly 37 is made of, for example, metal or synthetic resin. Further, on the outer peripheral surface of the rotating brush assembly 37, a groove portion (not shown) that holds the proximal end side of each cleaning member 38 is formed in a spiral shape.

  The cleaning member 38 is, for example, a blade that is a wiping member, brush hair that is a scraping member, or a combination of these, and the proximal end side is held in the groove portion of the rotating brush assembly 37, thereby rotating the rotating brush assembly 37. The distal end side protrudes in the radial direction of the rotating brush assembly 37 in a spiral wall shape along the axial direction of the rotating brush assembly 37.

  The connecting pipe 22 communicates with the suction port 35, and an end projecting rearward from the case body 21 is detachably connected to the distal end side of the extension pipe 19. Further, the connection pipe 22 is connected to a position near the rear part of the case body 21 so as to be rotatable in the vertical direction.

  As shown in FIGS. 1 to 6, each traveling wheel 23 includes a shaft portion 51 as a substantially cylindrical rotating body unit rotating shaft, a traveling wheel portion 52 as a rotating body portion that contacts the floor surface F, A plurality of, for example, four coil springs 53, which are interposed between the shaft 51 and the traveling wheel 52, and a retaining member 54 for retaining the shaft 51 from the case body 21. A transparent cover 55 is provided on the side opposite to the case body 21 side, that is, on the outer side. Since each traveling wheel 23 is symmetrical with each other in the left-right width direction of the floor brush 20, only one traveling wheel 23 will be described, and description of the other traveling wheel 23 will be omitted.

  The shaft portion 51 is a portion for rotatably supporting a bearing portion 61 formed on the side portion of the case body 21, and is formed of, for example, a synthetic resin. The shaft portion 51 includes a cylindrical shaft portion main body 63, a restriction portion 65 continuing to the one end side of the shaft portion main body 63 via the cylindrical portion 64, and the entire outer periphery on the other end side of the shaft portion main body 63. A flange portion 66 that protrudes in a flange shape and extends along the side portion of the case body 21 is integrally provided.

  Here, the bearing portion 61 is integrally provided with a substantially cylindrical bearing portion main body 68 and a screw boss portion 69 formed coaxially on the center side of the bearing portion main body 68. Projects sideways along the direction. Further, as shown in FIG. 7, the bearing 61 is substantially coaxial with the rotating brush 32 and is formed at a position ahead of the rotating shaft 22 a of the connecting tube 22. As a result, the traveling wheel 23 has a center position located on the front side of the center position of the rotation shaft 22a of the connecting pipe 22.

  Further, as shown in FIGS. 1 to 6, the shaft portion main body 63 is rotatably supported by fitting the inner peripheral side to the bearing portion main body 68, and is used for locking the coil springs 53 on the outer periphery. A locking projection 71 is formed, and a distal end surface portion 72 as a shaft portion main body surface portion extending toward the central axis is formed on the distal end side, and an insertion hole through which the screw boss portion 69 is inserted at the center position of the distal end surface portion 72 73 is formed, and a retaining surface portion 74 extending toward the central axis is formed at the inner edge of the insertion hole 73.

  The locking protrusions 71 are formed in a semi-cylindrical shape with the front end surface 72 and the front side being substantially flush with each other, and are disposed at substantially equal intervals in the circumferential direction. In addition, a groove-like recess 76 for holding one end of the coil spring 53 is formed around the base end of each locking projection 71.

  The cylindrical portion 64 has a proximal end portion integrally formed around the insertion hole 73 of the distal end surface portion 72 of the shaft portion main body 63, and is coaxial with the insertion hole 73. The cylindrical portion 64 has a smaller diameter than the shaft portion main body 63.

  Further, the restricting portion 65 includes an annular restricting portion main body 81 protruding in a flange shape from the entire outer peripheral surface of the tip of the cylindrical portion 64 in a radial direction, and a plurality of shaft portion restricting portions 82 protruding from the restricting portion main body 81. And integrated. Therefore, an annular fitting portion 83 is formed in a groove shape on the outer peripheral side of the cylindrical portion 64 between the restricting portion 65 and the front surface of the distal end surface portion 72 of the shaft portion main body 63.

  A plurality of shaft restricting portions 82 are formed corresponding to the coil springs 53, for example, and are spaced apart from each other at substantially equal intervals in the circumferential direction.

  The flange portion 66 covers the case body 21 side of the traveling wheel 23.

In addition, the traveling wheel portion 52 is movably supported by each coil spring 53 in a direction intersecting (orthogonal) with the axial direction of the shaft portion 51 with respect to the shaft portion 51, in this embodiment. And substantially fixed so as not to rotate in the circumferential direction with respect to the shaft portion 51. The traveling wheel portion 52 includes a traveling wheel portion main body 85 as a cylindrical rotating body main body, and a plurality of portions corresponding to, for example, coil springs 53 from the inner peripheral edge of the traveling wheel portion main body 85 to the central axis direction. The traveling wheel part restricting part 86 as the formed rotating body part restricting part and the grounding part 88 attached to the mounting recess 87 formed over the entire outer peripheral surface of the traveling wheel part body 85 are integrated. I have.

  The traveling wheel portion main body 85 is formed larger in diameter than the shaft portion 51.

  The traveling wheel portion restricting portion 86 is slidably contacted with each shaft portion restricting portion 82 by being fitted to the fitting portion 83 of the shaft portion 51 to restrict the axial position of the shaft portion 51 and the traveling wheel portion 52 to each other. And is formed at the inner edge portion of the end portion on the side far from the case body 21, which is one end side in the axial direction of the traveling wheel portion main body 85. Further, these traveling wheel portion restricting portions 86 are formed in a substantially trapezoidal shape whose width dimension gradually decreases in the direction of the central axis of the traveling wheel portion main body 85, and are disposed at substantially equal intervals in the circumferential direction. Has been. Therefore, between the traveling wheel portion regulating portions 86, hole portions 91 (FIG. 2) to which the coil springs 53 are respectively attached are formed at substantially equal intervals in the circumferential direction. Furthermore, an attachment hole 92 for attaching the cover 55 is formed in an arc shape along the inner edge portion of the traveling wheel portion main body 85 at the base end portion of the traveling wheel portion restricting portion 86. And between the front-end | tip parts of these driving | running | working wheel part control parts 86, the through-hole part 93 which can insert the control part main body 81 of the control part 65 of the axial part 51 and cannot insert the axial part main body 63 is formed. .

  Each hole portion 91 is formed to have a larger width dimension than each shaft portion regulating portion 82 of the shaft portion 51. Each hole 91 is formed with a cylindrical holding portion 95 for holding the other end side of the coil spring 53 so as to protrude from the inner edge portion of the traveling wheel portion main body 85 in the central axis direction.

  Further, as shown in FIG. 8, the grounding portion 88 is a portion that contacts the floor surface F in a state where the floor brush 20 is placed on the floor surface F. Further, the ground contact portion 88 is, for example, a brushed cloth, and is formed over the entire circumference of the traveling wheel portion main body 85. The grounding portion 88 is such that the front portion is located in front of the front portion of the case body 21 and the front end portion of the front cover 25 in a state where the traveling wheel 23 is pivotally supported by the bearing portion 61 of the case body 21. The lower part is located below the lower surface of the case body 21 while being located rearward.

  Further, as shown in FIGS. 5 and 6, each coil spring 53 has one end portion held in each recess 76 (FIG. 1) and the other end portion held in each holding portion 95 so that the diameter of the traveling wheel 23 can be reduced. It is arranged radially along the direction. The coil springs 53 have substantially the same elastic coefficient, and support the traveling wheel portion 52 at a substantially coaxial position with respect to the shaft portion 51 without applying an external force. In addition to the coil spring 53, any biasing means formed by an elastic member (flexible member) such as rubber, leaf spring, or elastomer may be disposed between the recess 76 and the holding portion 95, Further, a tension spring or the like that urges the traveling wheel portion 52 inward in the radial direction with respect to the shaft portion 51 may be used.

  As shown in FIG. 1, the retaining member 54 is formed in a substantially cylindrical shape and is fitted in the shaft body 63. The retaining member 54 is formed to have a larger diameter than the screw boss portion 69 of the bearing portion 61, and is fixed to the screw boss portion 69 via a screw 97 as a fixing means. As a result, the retaining surface portion 74 of the shaft portion 51 is located between the bearing portion 61 and the retaining member 54, and the shaft portion 51 is prevented from coming off from the bearing portion 61.

  The cover 55 is formed in a substantially disc shape that covers one side of the traveling wheel portion main body 85. In addition, a plurality of claw portions 101 are arranged at substantially equal intervals in the circumferential direction on the peripheral portion of the cover 55. These claw portions 101 are inserted into the respective mounting holes 92 of the traveling wheel portion 52, and are respectively locked by locking convex portions 102 formed on one side in the circumferential direction of the mounting holes 92, whereby the cover 55 is It is fixed to the traveling wheel 52 so as not to come off. Further, a rotation groove 103 having a longitudinal groove shape is formed in the central portion of the cover 55 along the radial direction. The turning groove 103 is for turning the cover 55 in the circumferential direction by inserting a coin or the like when the cover 55 is removed from the traveling wheel portion 52.

  Further, the front cover 25 is formed in a horizontally long shape extending between both ends of the front suction port 36, and is curved in an arc shape so as to protrude forward in a sectional view. Further, the upper end portion of the front cover 25 is pivotally supported by the upper end portion of the front suction port 36 and is rotated forward by a front cover urging means (not shown) such as a torsion spring. It is so energized. Further, at positions near the lower end of the front cover 25, protrusions 25a and 25a are formed to protrude forward, and these protrusions 25a and 25a are in the natural state (normal state) and each running wheel 23 is formed. Projects forward from the front end of the. Note that these protrusions 25a, 25a are not essential, and a part of the front cover 25 itself may protrude forward from the front end of each traveling wheel 23.

  Next, the operation of the first embodiment will be described.

  First, a method for assembling each traveling wheel 23 will be described.

  From the state shown in FIG. 2, the shaft portion 51 is inserted into the traveling wheel portion 52 from the other end side as shown in FIG. 3. Specifically, the restricting portion main body 81 is inserted into the insertion hole portion 93 from the other end side in a state where each shaft restricting portion 82 is fitted in each hole portion 91.

  Next, as shown in FIG. 4, the shaft portion 51 is relatively circumferential with respect to the traveling wheel portion 52 in a state where each shaft portion restricting portion 82 is positioned closer to one end side than each traveling wheel portion restricting portion 86. By rotating it by a predetermined angle (for example, clockwise direction, for example, about 90 ° in the present embodiment), each shaft portion restricting portion 82 comes into sliding contact with the end face of each traveling wheel portion restricting portion 86, and FIG. ), Each traveling wheel portion restricting portion 86 is fitted to the fitting portion 83.

  In this state, the locking protrusions 71 of the shaft 51 are in a state of facing the holding portions 95 of the traveling wheel 52, so that the center position of the shaft 51 is slightly different from the center position of the traveling wheel 52. In a state where one locking projection 71 is inserted into one end of one coil spring 53 and one end of the coil spring 53 is held in one recess 76, the other end of the coil spring 53 is One holding part 95 is fitted and held.

  Similarly, in the state in which each locking projection 71 is inserted into one end of each of the other three coil springs 53 and one end of each coil spring 53 is held in each recess 76, as shown in FIG. The other end portion of each coil spring 53 is fitted and held in each holding portion 95. In this state, each coil spring 53 is fitted in each hole 91 and exposed in the axial direction of the traveling wheel 23.

  Thereafter, as shown in FIGS. 1 (a) and 1 (b), a shaft body 63 of each shaft portion 51 is fitted to each bearing portion 61 on the side portion of the separately assembled case body 21, thereby screw bosses. Portion 69 is inserted into insertion hole 73, retaining member 54 is fitted into shaft body 63, screw 97 is screwed to screw boss portion 69, and each shaft portion 51 is attached to bearing portion 61 of case body 21. It is pivotally supported.

  Then, each claw portion 101 of the cover 55 is inserted into each attachment hole 92 of the traveling wheel portion 52 from one end side, and the cover 55 is rotated by a predetermined angle in the circumferential direction, so that each claw portion 101 is attached to each attachment hole. The cover 55 is fixed to the traveling wheel portion 52 by being respectively locked to the locking projections 102 of 92.

  When cleaning, as shown in FIG. 11, the connecting pipe 22 is connected to the tip of the extension pipe 19, the floor brush 20 is placed on the floor F (FIG. 8), and the gripping part 17 is gripped. Then, the floor brush 20 is moved back and forth through the extension pipe 19 in a state where the desired setting button 18 is operated and the electric blower 13 is operated in the desired operation mode.

  As shown in FIG. 8, the floor brush 20 can obtain good traveling performance when the grounding portion 88 of each traveling wheel 23 contacts the floor surface F and rotates during traveling.

  In the floor brush 20, the dust on the floor surface F (FIG. 8) is sucked together with the air by the negative pressure acting by the operation of the electric blower 13 shown in FIG. The sucked air is sucked in and is sucked together with dust into the dust collecting part through the extension pipe 19, the hose body 15 and the main body suction port 14 shown in FIG. 11, and the dust is collected in this dust collecting part. After that, it is sucked into the electric blower 13 to become exhaust air, and is exhausted from an exhaust hole (not shown) of the cleaner body 12.

  Further, as shown in FIG. 8 (a), when the floor brush 20 runs forward and the floor brush 20 collides with an obstacle O such as a wall or furniture, first, each protrusion of the front cover 25 is projected. The portion 25a comes into contact with the obstacle O, and the front cover 25 rotates rearward against the urging force of the front cover urging means. Next, as shown in FIG. The front part contacts the obstacle O.

  In this state, when the floor brush 20 further travels forward, the traveling wheel portion 52 of each traveling wheel 23 is fixed at the position of the obstacle O as shown in FIG. The part 51 and the case body 21 are moved forward and downward relative to the traveling wheel part 52 while resisting the bias of the coil spring 53. For this reason, the impact at the time of collision is absorbed by the expansion and contraction of each coil spring 53. At the same time, a part of the front end of the cleaning member 38 of the rotary brush 32 is moved forward from the lower part of the front suction port 36 (FIG. 8B) where the front cover 25 is rotated backward and the lower part is opened. While projecting and located in the vicinity of the obstacle O, a part of the front end side of the cleaning member 38 projects downward relative to each traveling wheel 23 and contacts the floor surface F. Then, when the rotary brush 32 is rotated by operating a predetermined setting button 18 (FIG. 11), the rotary brush 32 scrapes off dust on the floor surface F near the obstacle O, and the front suction port 36 (FIG. 8). Inhale from (b)) and clean.

  Further, when the floor brush 20 is separated from the obstacle O, the coil spring 53 assists the separation of the floor brush 20 from the obstacle O by pressing the floor brush 20 in a direction away from the obstacle O. Therefore, the traveling operation of the floor brush 20 is facilitated, and the burden on the hand of the operator who performs the traveling operation can be reduced.

  As described above, according to the first embodiment, between the shaft portion 51 that is rotatably supported by the case body 21 and the traveling wheel portion 52 that is partially positioned around the shaft portion 51. Further, by interposing a coil spring 53 that biases the traveling wheel portion 52 against the shaft portion 51, when the traveling wheel portion 52 collides with the obstacle O, the traveling wheel portion 52 is urged by the coil spring 53. Since it moves relative to the shaft 51 and the case body 21 and absorbs the shock, for example, the running wheel 52 is softened or increased in thickness, etc. It can be improved.

  That is, in the case where the running wheel 52 is made of an elastic member or the like to increase its thickness to obtain sufficient buffering properties, when the running wheel 52 comes into contact with the floor surface F, the weight of the floor brush 20 is reduced. While the traveling wheel portion 52 is bent and the ground contact area (grip force) with respect to the floor surface F is increased, the traveling performance may be reduced. In the first embodiment, the thickness of the traveling wheel portion 52 is reduced. Since a large cushioning stroke can be obtained by the coil spring 53 without increasing it, the traveling wheel portion 52 does not bend during traveling and the gripping force does not increase, and good traveling performance can be obtained.

  Further, by arranging a plurality of coil springs 53 at substantially equal intervals in the circumferential direction of the traveling wheel 23, the traveling wheel portion 52 can be uniformly biased and supported with respect to the shaft portion 51, and the rotation of the traveling wheel 23 can be performed. Regardless of the position, it is possible to reliably obtain buffering properties.

  Further, since the floor brush 20 includes a connecting tube 22 that can be rotated in the vertical direction, the floor brush 20 is placed on the floor surface F in a state where the operator grips the grip portion 17 of the hand operation portion 16. In doing so, the front side of the case body 21 is rotated downward by the weight of the case body 21 with respect to the connection pipe 22 fixed to the hand operating section 16 side via the extension pipe 19 (solid line in FIG. 9). Attempt to ground from the front side of the case body 21 to the floor F. For this reason, the center position of the traveling wheel 23, that is, the position of the shaft portion 51 of the traveling wheel 23 that is pivotally supported by the bearing portion 61 of the case body 21 is positioned in front of the center position of the rotating shaft 22a of the connecting pipe 22. 9, when the floor brush 20 is placed on the floor surface F as shown by the solid line in FIG. 9, the traveling wheel 23 contacts the floor surface F before the case body 21. The impact at the time of mounting on the surface F can be buffered by the traveling wheels 23.

  Further, by arranging the traveling wheels 23 on both sides of the case body 21, for example, the traveling performance can be further improved as compared with the case where the traveling wheels 23 are disposed only at one central portion of the case body 21. In addition, when the front side of the floor brush 20 collides with the obstacle O, at least one of the traveling wheels 23 can be reliably brought into contact with the obstacle O regardless of the angle between the floor brush 20 and the obstacle O. , Buffering can be secured. Moreover, when the vicinity of the obstacle O is cleaned, the operator presses the floor brush 20 against the obstacle O, so that the pressing causes the shaft portions 51 of the traveling wheels 23 and 23 (the bearing portions 61 of the case body 21). ) Moves relative to the traveling wheel portions 52 and 52 against the bias of the coil spring 53 and moves forward and lower, the case body 21 sinks and approaches the floor surface F in the vicinity of the obstacle O. Therefore, the suction of dust from the suction port 35 and the front suction port 36 and the scraping of dust from the floor surface F by the rotating brush 32 are improved, and the vicinity of the obstacle O can be efficiently cleaned.

  Further, by positioning the traveling wheel 23 substantially coaxially with the rotating brush 32, vibration generated by the rotational drive of the rotating brush 32 is absorbed by the coil spring 53 of the traveling wheel 23 and can be hardly transmitted to the floor F or the like.

  Then, by causing a part of the traveling wheel 23 to protrude forward from the case body 21, the traveling wheel 23 can move against the obstacle O when the floor brush 20 travels in the front-rear direction during cleaning. Since the contact is made before 21, the impact when the front side of the floor brush 20 collides with the obstacle O can be buffered by the traveling wheels 23.

  Further, by using the coil spring 53 as the urging means, it becomes easier to uniformly support the traveling wheel portion 52 with respect to the shaft portion 51, the deterioration of the coil spring 53 itself is small, and the buffer stroke is increased. And sufficient buffering properties can be obtained.

  Furthermore, by restricting the axial positions of the shaft 51 and the traveling wheel 52, the shaft 53 is bent when the traveling wheel 23 collides with the obstacle O or the floor surface F and the coil spring 53 is bent. It is possible to prevent the coil spring 53 from coming off due to the portion 51 and the traveling wheel portion 52 being displaced in the axial direction.

  Further, the shaft portion 51 is formed with a plurality of shaft portion restricting portions 82 protruding outward, and the plurality of hole portions 91 into which the shaft portion restricting portions 82 can be inserted into the traveling wheel portion 52, and between these hole portions 91 The traveling wheel portion restricting portion 86 for restricting the axial position of the shaft portion 51 and the traveling wheel portion 52 by being in contact with the shaft portion restricting portion 82 and forming the coil spring 53 with the hole portion 91 is formed. When assembling the traveling wheel 23, each shaft portion restricting portion 82 is inserted into each hole portion 91 and rotated in the circumferential direction so as to contact each shaft portion restricting portion 82 and each hole. By disposing the coil spring 53 in the portion 91, the traveling wheel 23 can be easily assembled. Moreover, the shaft 51 is prevented from coming off from the traveling wheel 52 when the coil spring 53 is attached when the traveling wheel 23 is assembled by the contact between the shaft restricting portion 82 and the traveling wheel restricting portion 86. Since it can hold | maintain in the state which carried out, the assembly property of the running wheel 23 improves more.

  Further, by covering the coil spring 53 of the traveling wheel 23 with a transparent cover 55, a support mechanism for the shaft portion 51 including the coil spring 53 exposed in the axial direction of the traveling wheel 23 from the hole 91 and the traveling wheel portion 52 is provided. It can be seen from the outside of the traveling wheel 23 through the cover 55. For this reason, since the operator can visually observe the expansion and contraction of the coil spring 53 and the movement of the shaft portion 51 and the traveling wheel portion 52 when the traveling wheel 23 contacts the obstacle O and the floor surface F, the appearance is improved.

  A front cover 25 that can be rotated in the front-rear direction is disposed at the front portion of the case body 21, and the protrusions 25 a of the front cover 25 are positioned in front of the traveling wheels 23, so that the vicinity of the obstacle O When cleaning the front cover 25, the front cover 25 contacts the obstacle O before the traveling wheel 23 and rotates backward. The front cover 25 opens the lower portion of the front suction port 36, and the front dust is removed. Can be sucked in from the lower part of the front suction port 36. Moreover, since the cleaning member 38 of the rotating brush 32 projects relatively from the lower part of the front suction port 36 that is opened by the front cover 25 contacting the obstacle O and rotating backward, the rotating brush 32 is When rotated, the protruding cleaning member 38 can scrape off dust on the floor surface F in the vicinity of the obstacle O. Therefore, the floor surface F near the obstacle O can be efficiently cleaned.

  In addition, since the traveling wheel portion 52 has a large diameter, the traveling wheel 23 can smoothly climb over a step or the like, and good traveling performance can be obtained. Further, by making the ground contact portion 88 of the traveling wheel portion 52 soft, the obstacle O is not damaged at the time of collision with the obstacle O.

  In the first embodiment, the traveling wheel 23 is not used in the coil spring 53, and the entire circumference between the outer peripheral side of the shaft portion 51 and the inner peripheral side of the traveling wheel portion 52 is shown in FIG. As shown in the second embodiment, the biasing means 105 formed in an annular shape by an elastic member (flexible member) such as rubber, a leaf spring, or an elastomer may be disposed. Even in this case, the same operational effects as those of the first embodiment can be obtained.

  Next, a third embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the third embodiment, the traveling wheels 23, 23 of the first embodiment are attached to the case body 21 in a state where the central axis is along the vertical direction.

  That is, as shown in FIGS. 13, 14, and 16, each traveling wheel 23 is arranged on both sides of the case body 21 with the cover 55 on the upper side, and from the side surface of the case body 21 to the grounding portion 88 side. The part protrudes. Further, each traveling wheel 23 is pivotally supported by the case body 21, and the front part of the grounding portion 88 is located in front of the front part of the case body 21 and is located behind the front end part of the front cover 25. ing. Further, each traveling wheel 23 is rotatably supported with a shaft 51 sandwiched between the front side of the lower case 26 and the front case 29 from above and below.

  Then, as shown in FIG. 15, when the floor brush 20 travels sideways and collides with the wall portion W that is an obstacle, first, the ground contact portion 88 of the traveling wheel 23 contacts the wall portion W. . In this state, as indicated by an imaginary line, the floor brush 20 further travels to the side, whereby the traveling wheel portion 52 of each traveling wheel 23 is fixed at the position of the wall portion W, so that the shaft portion 51 The case body 21 moves to the side relative to the traveling wheel portion 52 while resisting the bias of the coil spring 53. For this reason, the impact at the time of collision is absorbed by the expansion and contraction of each coil spring 53.

  Further, when the floor brush 20 travels forward and the floor brush 20 collides with an obstacle O such as a wall or furniture, first, each projection 25a of the front cover 25 comes into contact with the obstacle O. The front cover 25 rotates backward against the urging force of the front cover urging means, and then, as indicated by an imaginary line, the front portion of the traveling wheel 23 comes into contact with the obstacle O, and further the floor brush. As the vehicle 20 travels forward, the traveling wheel portion 52 of each traveling wheel 23 is fixed at the position of the obstacle O, so that the shaft portion 51 and the case body 21 resist the bias of the coil spring 53. While moving relative to the traveling wheel 52, the vehicle moves forward. For this reason, the impact at the time of collision is absorbed by the expansion and contraction of each coil spring 53.

  In this way, the center axis of each traveling wheel 23 is attached to the case body 21 along the vertical direction, and a part of each traveling wheel 23 protrudes from the side surface of the case body 21 to clean the floor. When the brush 20 travels in the left-right direction, the traveling wheel 23 comes into contact with the wall W before the case body 21, so that the impact when the side portion of the floor brush 20 collides with the wall W. Can be buffered by the running wheel 23. Similarly, when the floor brush 20 is caused to travel in the front-rear direction during cleaning by causing a part of the traveling wheel 23 to protrude forward from the case body 21, the traveling wheel 23 is in the case against the obstacle O. Since the contact is made before the body 21, the traveling wheel 23 can buffer the impact when the front side of the floor brush 20 collides with the obstacle O.

  And since each side wall W and the front obstacle O can be buffered by the traveling wheels 23, the floor brush 20 is moved forward along the side wall W to the obstacle O. When the inner edge of the room is cleaned by moving it to the side along the obstacle O after being moved to the position, it is possible to obtain good buffering properties. Moreover, when traveling along the side wall portion W, each traveling wheel 23 is not easily rotated and resisted by contact with the wall portion W, so that traveling performance is not deteriorated.

  Note that the same effects can be obtained by applying the biasing means 105 of the second embodiment in place of the coil spring 53 of the traveling wheel 23 of the third embodiment.

  Each traveling wheel 23 may be arranged with the cover 55 on the lower side.

  Further, in each of the above embodiments, the details of the vacuum cleaner 11 are not limited to the above-described configuration. For example, not only the canister-type vacuum cleaner 11 but also a floor brush at the bottom of the vertically long vacuum cleaner body 12 Any vacuum cleaner, such as an upright vacuum cleaner with 20 connected, can be used.

11 Vacuum cleaner
12 Vacuum cleaner body
13 Electric blower
20 Floor brush as suction port
21 Case body
22 Connection pipe
22a Rotating shaft
23 Running wheel as a rotating body unit
25 Front cover
32 Rotating brush as rotating cleaning body
51 Shaft
52 Running wheel as a rotating body
53 Coil spring as biasing means
55 Cover
82 Shaft control section
86 Running wheel part restricting part as rotating part restricting part
91 hole
105 Energizing means
F Floor surface to be cleaned
O obstacle

Claims (14)

The case body,
A rotating body unit attached to the case body,
The rotating body unit is
A shaft portion having a plurality of shaft portion restricting portions, and rotatably supported by the case body;
A plurality of holes that can be inserted through the shaft restricting portions, and a rotating body portion that is located between the holes and restricts the position of the shaft portion in the axial direction by contacting the shaft restricting portions. and a regulating portion, a rotating body portion at least partially positioned around said shaft portion,
And a biasing means disposed between each of the hole portions and interposed between the shaft portion and the rotating body portion, and biasing the rotating body portion against the shaft portion. Suction port body. At least a part of the rotating body unit projects forward of the case body
The suction port body according to claim 1, wherein: The case body,
A rotating body unit attached to the case body,
The rotating body unit is
A shaft portion rotatably supported by the case body;
A rotating body part at least a part of which is located around the shaft part, and a front part projects forward of the case body;
A biasing means interposed between the shaft portion and the rotating body portion and biasing the rotating body portion in the circumferential direction with respect to the shaft portion;
The rotating body portion is moved to the shaft portion to a position where the case body is relatively moved closer to the obstacle and the surface to be cleaned against the urging force of the urging means by pressing the rotating body portion against the obstacle. Can move relative to
A suction mouth characterized by that. The suction port body according to any one of claims 1 to 3 , wherein a plurality of biasing means are arranged at substantially equal intervals in the circumferential direction of the rotating body unit. The case body includes a connecting pipe that is pivotally supported so as to be rotatable at least in the vertical direction,
Rotator unit is a rotating body can ground the riding surface, any 4 claims 1 to, characterized in that at least the center position is located forward of the central position of the rotation axis of the connecting pipe suction port body of the one described. The suction port body according to claim 5 , wherein the rotating body units are respectively arranged on both side portions of the case body. A rotating cleaning body is rotatably attached to the case body so as to face the surface to be cleaned.
The suction port body according to any one of claims 1 to 6 , wherein the rotating body unit is positioned substantially coaxially with the rotating cleaning body . The suction port body according to claim 3 or 4 , wherein the rotating body unit is attached to the case body with a central axis along the vertical direction, and a part of the rotating body unit protrudes from a side surface of the case body . The suction port body according to any one of claims 1 to 8, wherein the urging means is a coil spring. The suction port body according to any one of claims 3 to 9, wherein the shaft portion and the rotating body portion are mutually restricted in axial position. The shaft portion has a plurality of shaft portion restricting portions,
The rotating body is
A plurality of holes through which the shaft restricting portions can be inserted;
It has a rotating body part restricting part that is positioned between these hole parts and restricts the axial position of the shaft part and the rotating body part by contacting the shaft part restricting part,
The suction port body according to claim 10, wherein the biasing means is disposed in each of the holes. The suction port body according to any one of claims 1 to 11, wherein the rotating body unit includes a transparent cover that covers the biasing means. The front cover of the case body is disposed so as to be pivotable in the front-rear direction, and at least a part thereof includes a front cover positioned on the front side of the rotating body unit. Suction port body. A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising: a suction port body according to any one of claims 1 to 13, which is connected to the suction side of the electric blower.

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