JP2014079512A - Rotating mechanism of side brush for self-propelled vacuum cleaner and the self-propelled vacuum cleaner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating mechanism of a side brush for a self-propelled vacuum cleaner and the self-propelled vacuum cleaner including the same.SOLUTION: A rotating mechanism of a side brush for a self-propelled vacuum cleaner includes: an internal gear fixed to the bottom face of an enclosure of a self-propelled vacuum cleaner so as to take the shaft center of a rotating shaft provided to the bottom face side of the enclosure as a center; an eccentric shaft connected to the rotating shaft so as to be eccentric with respect to the rotating shaft; an external gear fitted to the eccentric shaft to mesh with the internal gear; and a side brush connected to the external gear so as to be integrally rotatable. The external gear and the side brush are configured to rotate around the shaft center of the eccentric shaft while revolving around the shaft center of the rotating shaft.

Description

  The present invention relates to a rotating mechanism of a side brush for a self-propelled cleaner and a self-propelled cleaner provided with the same.

  As a self-propelled cleaner for cleaning dust such as a floor surface, Patent Document 1 discloses a suction port provided at the bottom rear of a disk-shaped housing, a main brush provided in the suction port, A dust collection unit that collects dust on the floor surface swept up by the rotation of the main brush, and a pair of side brushes that are provided at the left and right positions ahead of the main brush and collect dust on the floor surface. A self-propelled vacuum cleaner has been proposed.

  The side brush of the self-propelled cleaner includes a support bracket that is attached to the rotating shaft of the side brush motor. The support bracket has a columnar attachment portion attached to the rotating shaft of the side brush motor, a substantially disc-shaped support plate in which the brush hairs are implanted, and a tapered outer peripheral surface provided on the lower surface of the support plate. It is comprised from the auxiliary member. The mounting portion, the support plate, and the auxiliary member are integrally formed by resin molding. The bristle is planted so as to extend in an annular shape and obliquely downward with respect to the tapered surface formed at the peripheral edge of the support plate. As for an auxiliary member, the said taper outer peripheral surface is arrange | positioned along the direction where a bristle extends.

  During the cleaning operation of the self-propelled cleaner, the side brush is driven by the side brush motor and rotates in the horizontal direction. At this time, when the bristle is bent inward by fitting the bristle into the concave portion of the floor surface, the bristle comes into contact with the tapered outer peripheral surface of the auxiliary member. When a force that further causes the brush hair to bend inward is applied, the brush hair is bounced off to the opposite side (outside of the auxiliary member) due to the elasticity of the brush hair. As a result, it is possible to prevent the brush bristle from having large wrinkles and to maintain the dust sweeping ability of the bristle.

JP 2006-280506 A

  However, such a conventional self-propelled cleaner may be cleaned while sucking and removing dust on the floor surface while moving along an indoor wall. For example, the wall and the wall intersect at a right angle. When it reaches the corner, it turns 90 ° and cleans while moving along the wall at the end. At this time, the self-propelled cleaner has a disk shape, and the side brush rotates (rotates) around the rotation axis, so that the side brush does not reach the corner. Therefore, it has been difficult for the conventional self-propelled cleaner to scrape and remove the dust accumulated in the corners of the room.

  The present invention has been made in view of the above circumstances, and has a self-propelled vacuum cleaner side brush rotation mechanism with improved cleaning ability for indoor corners, and a self-propelled cleaning provided with the same. The machine is provided.

Thus, according to the present invention, the internal gear fixed to the bottom surface of the housing so as to be centered on the axis of the rotation shaft provided on the bottom surface side of the housing of the self-propelled cleaner,
An eccentric shaft connected to the rotary shaft so as to be eccentric with the rotary shaft;
An external gear attached to the eccentric shaft so as to mesh with the internal gear;
A side brush connected to the external gear so as to be integrally rotatable,
A rotating mechanism of a side brush for a self-propelled cleaner is provided in which the external gear and the side brush rotate around the axis of the eccentric shaft while revolving around the axis of the rotating shaft. .

  Moreover, according to another viewpoint of this invention, the self-propelled cleaner provided with the rotation mechanism of the said side brush for self-propelled cleaners is provided.

  In the rotation mechanism of the side brush for a self-propelled cleaner of the present invention, the external gear and the side brush rotate integrally as the rotation shaft rotates. At this time, the trajectory along which the tip of the side brush moves is close to a substantially square rather than a circle. Therefore, the side brush can easily reach the corner of the room, and the ability to clean the corner by the self-propelled cleaner is improved.

It is a perspective view of the self-propelled cleaner concerning Embodiment 1 of the present invention. It is AA arrow sectional drawing of the self-propelled cleaner shown by FIG. It is a bottom view of the self-propelled cleaner shown in FIG. FIG. 3 is a schematic cross-sectional view showing a side brush rotation mechanism in the first embodiment. FIGS. 5A to 5C are diagrams illustrating the rotational motion of the side brush in the first embodiment. 6 (A) to 6 (C) are diagrams for explaining the rotational movement of the side brush subsequent to FIG. 5 (C). FIGS. 7A to 7C are diagrams illustrating the rotational movement of the side brush subsequent to FIG. 6C. 8A to 8C are diagrams for explaining the rotational motion of the side brush subsequent to FIG. 7C. It is a conceptual diagram explaining the rotational motion of the side brush in Embodiment 1. FIG.

The rotation mechanism of the side brush for the self-propelled cleaner of the present invention is fixed to the bottom surface of the casing so as to be centered on the axis of the rotation shaft provided on the bottom surface side of the casing of the self-propelled cleaner. An internal gear, an eccentric shaft connected to the rotary shaft so as to be eccentric with the rotary shaft, an external gear attached to the eccentric shaft so as to mesh with the internal gear, and the external gear can be rotated together with the external gear. And a side brush connected to.
The external gear and the side brush are configured to rotate around the axis of the eccentric shaft while revolving around the axis of the rotating shaft.

  The rotation mechanism of the side brush for a self-propelled cleaner of the present invention may be configured as follows, and the configurations thereof may be combined as appropriate.

(1) The relationship between the number of teeth r of the internal gear and the number of teeth s of the external gear may be 3r = 4s.
In this way, the external gear and the side brush rotate by 1/3 rotation around the axis of the external gear while revolving around the axis of the rotation shaft. Since this movement of the external gear and the side brush corresponds to a triangular movement of the rouleau, the trajectory along which the tip of the side brush moves is not a circle but a substantially square (a square with rounded corners). Therefore, the side brush can reach the corner of the room more easily, and the cleaning ability to the corner by the self-propelled cleaner is improved.
(2) The side brush has a brush base portion connected to the external gear, and three brush hair bundles implanted in the brush base portion, and the brush base portion is You may have the insertion port into which the base end of the said 3 brush bristle bundle is inserted in the part corresponded to the vertex position of the equilateral triangle equidistant from the axial center of an external gear.
If it does in this way, a bristle bundle can be reached to the back of the corner of a room, and the cleaning ability to a corner can be most effectively exhibited. Further, a brush bristle bundle may be disposed between two adjacent bristle bundles in the three brush bristle bundles, whereby dust can be scraped more efficiently with the side brush.

(3) The brush base portion that rotates integrally with the external gear may be formed in a size that prevents the internal gear from being exposed to the outside.
In this way, it is possible to prevent dust on the floor surface from entering the inside of the housing of the self-propelled cleaner through the space between the internal gear and the external gear. Accordingly, there is no problem that the external brush and the internal gear bite dust and debris and prevent the side brush from rotating. Furthermore, it is possible to avoid an accident in which the user is injured by inserting a finger into the space between the internal gear and the rotating external gear.

(4) The brush base portion and the external gear may be integrally formed of resin.
In this way, the cost can be reduced by reducing the number of parts.
Further, in the self-propelled cleaner provided with the side brush rotating mechanism, when one side of a substantially square that is the locus of the tip of the side brush is arranged on the wheel side of the self-propelled cleaner, Even if the rotation range is widened, it is advantageous because the side brush is difficult to be stepped on with wheels.

  Hereinafter, a rotating mechanism of a side brush for a self-propelled cleaner according to the present invention and a self-propelled cleaner provided with the same will be described in detail with reference to the drawings. The present invention is not limited to the illustrated embodiment.

(Embodiment 1)
FIG. 1 is a perspective view of a self-propelled cleaner according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the self-propelled cleaner shown in FIG. 1 is a bottom view of the self-propelled cleaner shown in FIG.

The self-propelled vacuum cleaner 1 according to the present invention sucks air containing dust on the floor surface while self-propelling the floor surface where it is installed, and exhausts the air from which the dust has been removed to exhaust the air on the floor surface. It is a self-propelled vacuum cleaner that cleans.
The self-propelled cleaner 1 includes a disk-shaped housing 2, and a rotating brush 9, a side brush 10, a dust collection box 30, an electric blower 22, a pair of drive wheels 29, inside and outside the housing 2, Components such as a control unit including a rear wheel 26, a front wheel 27, and various sensors are provided.
In this self-propelled cleaner 1, a portion where the front wheel 27 is disposed is a front portion, a portion where the rear wheel 26 is disposed is a rear portion, and a portion where the dust collection box 30 is disposed is an intermediate portion.

  The housing 2 opens and closes when the dust collection box 30 is taken in and out of the housing 2 and the bottom plate 2a having a suction port 6 formed at a position near the boundary with the intermediate portion in the front portion. A top plate 2b having a lid portion 3 at an intermediate portion, and a bottom plate 2a and a side plate 2c having an annular shape in plan view provided along the outer periphery of the top plate 2b are provided. The bottom plate 2a is formed with a plurality of holes for projecting the lower portions of the front wheel 27, the pair of drive wheels 29 and the rear wheel 26 from the inside of the housing 2 to the outside, and the boundary between the front portion and the middle portion of the top plate 2b. An exhaust port 7 is formed in the vicinity. In addition, the side plate 2c is divided into two in the front and rear directions, and the front side portion of the side plate functions as a bumper.

  In addition, inside the housing 2, the front unit has a front storage chamber R <b> 1 that stores the motor unit 20, the electric blower 22, the ion generator 25 (not shown), and the like, and the dust collection box 30 is stored in the middle. It has an intermediate storage chamber R2, has a rear storage chamber R3 for storing the control board 15, battery 14, charging terminal 4, etc. of the control unit in the rear part, and has a suction path 11 and a vicinity of the boundary between the front part and the intermediate part. An exhaust passage 12 is provided. The suction path 11 communicates the suction port 6 and the intermediate storage chamber R2, and the exhaust path 12 communicates the intermediate storage chamber R2 and the front storage chamber R1. Each of the storage chambers R1, R2, R3, the suction path 11 and the exhaust path 12 is provided inside the housing 2 and is partitioned by a partition wall that forms these spaces.

  The suction port 6 is an open surface of the concave portion 8 formed on the bottom surface of the housing 2 (the lower surface of the bottom plate 2a) so as to face the floor surface F. A rotating brush 9 that rotates about a first axis parallel to the bottom surface of the housing 2 is provided in the recessed portion 8, and a second rotation perpendicular to the bottom surface of the housing 2 is provided on the left and right sides of the recessed portion 8. A side brush 10 that rotates about an axis is provided. The rotating brush 9 is formed by implanting a brush spirally on the outer peripheral surface of a roller that is a rotating shaft. The side brush 10 is formed by providing brush hair bundles radially at the lower end of the rotating shaft. The rotating shaft of the rotating brush 9 and the rotating shaft of the pair of side brushes 10 are pivotally attached to a part of the bottom plate 2a of the housing 2 and include a motor unit 20 provided in the vicinity thereof, a pulley, a belt, and the like. They are independently connected via a transmission mechanism. The side brush rotation mechanism M will be described in detail later.

  As shown in FIG. 3, a floor surface detection sensor 13 for detecting the floor surface F is disposed between the bottom surface of the housing 2 and the front wheel 27, and a similar floor is disposed in front of the side portions of the left and right drive wheels 29. A surface detection sensor 19 is arranged. When the downstairs are detected by the floor surface detection sensor 13, the detection signal is transmitted to the control unit, and the control unit controls the drive wheels 29 to stop. In addition, when the floor detection sensor 13 breaks down, the floor detection sensor 19 can detect the descending stair and stop both driving wheels 29, so that the self-propelled cleaner 1 is prevented from falling to the descending stair. Has been. Further, when the floor surface detection sensor 19 detects the descending staircase, the detection signal may be transmitted to the control unit, and the control unit may control the drive wheel 29 to travel avoiding the descending staircase.

The control board 15 is provided with a control circuit that controls each element such as the drive wheel 29, the rotating brush 9, the side brush 10, and the electric blower 22 in the self-propelled cleaner 1.
A charging terminal 4 for charging the battery 14 is provided at the rear end of the side plate 2 c of the housing 2. The self-propelled cleaner 1 that cleans the room while self-propelled returns to the charging stand 40 installed indoors. Thereby, the charging terminal 4 contacts the terminal part 41 provided in the charging stand 40, and the battery 14 is charged. The charging stand 40 connected to a commercial power source (outlet) is usually installed along the side wall S in the room.
The battery 14 is charged from the charging stand 40 via the charging terminal 4 and supplies power to each element such as the control board 15, the drive wheel 29, the rotating brush 9, the side brush 10, the electric blower 22, and various sensors.

The dust collection box 30 is usually stored in the intermediate storage chamber R2 above the axis of the rotation shaft of the drive wheels 29 in the housing 2, and the dust collected in the dust collection box 30 is collected. When discarding, the lid 3 of the housing 2 can be opened and the dust collection box 30 can be taken in and out.
The dust collection box 30 includes a dust collection container 31 having an opening, a filter unit 33 that covers the opening of the dust collection container 31, and a cover unit 32 that covers the filter 33 and the opening of the dust collection container 31. ing. The cover part 32 and the filter part 33 are pivotally supported by the opening edge of the front side of the dust collecting container 31 so that rotation is possible.
In the state where the dust collection box 30 is stored in the intermediate storage chamber R <b> 2 of the casing 2, the inflow path 34 that communicates with the suction path 11 of the casing 2 and the casing 2 are disposed at the front portion of the side wall of the dust collection container 31. An exhaust passage 35 communicating with the exhaust passage 12 is provided.

  In the self-propelled cleaner 1 configured as described above, the electric blower 22, the ion generator 25, the drive wheel 29, the rotating brush 9, and the side brush 10 are driven by a cleaning operation command. As a result, in a state where the rotary brush 9, the side brush 10, the drive wheel 29 and the rear wheel 26 are in contact with the floor surface F, the casing 2 self-propells within a predetermined range and removes dust on the floor surface F from the suction port 6. Inhale air containing. At this time, the dust on the floor surface F is scraped up by the rotation of the rotating brush 9 and guided to the suction port 6. Further, the dust on the side of the suction port 6 is guided to the suction port 6 by the rotation of the side brush 10.

  Air containing dust sucked into the housing 2 from the suction port 6 passes through the suction passage 11 of the housing 2 and the inflow passage 34 of the dust collection box 30 as indicated by an arrow A1 in FIG. It flows into the dust collecting container 31. The airflow that has flowed into the dust collecting container 31 passes through the filter portion 33, flows into the space between the filter portion 33 and the cover portion 32, and is discharged to the exhaust passage 12 of the housing 2 through the discharge passage 35. The At this time, the dust contained in the airflow in the dust collecting container 31 is captured by the filter unit 33, so that the dust accumulates in the dust collecting container 31.

The airflow flowing into the exhaust passage 12 of the housing 2 from the dust collection box 30 flows into the front storage chamber R1 as shown by the arrow A2 in FIG. 2, and flows through the first exhaust passage and the second exhaust passage (not shown). . The airflow flowing through the first exhaust path includes ions (plasma cluster ions) released by the ion generator. Then, as shown by an arrow A3 in FIG. 2, an airflow containing ions is exhausted obliquely upward at the rear from the exhaust port 7 provided on the upper surface of the housing 2. Thereby, cleaning on the floor surface F is performed, and indoor sterilization and deodorization are performed by ions contained in the exhaust of the self-propelled cleaner 1. At this time, exhaust is performed obliquely upward from the exhaust port 7 to the rear, so that the dust on the floor surface F is prevented from being rolled up, and the cleanliness of the room can be improved.
Although not shown, a part of the airflow flowing through the first exhaust path may be guided to the recess 8. In this way, since ions are included in the airflow guided from the suction port 6 to the suction path 11, the inside of the dust collection container 31 of the dust collection box 30 and the filter unit 33 can be sterilized and deodorized.

  Further, the self-propelled cleaner 1 has the left and right drive wheels 29 forwardly rotated in the same direction and moved forward, moved backward in the same direction and moved backward, and rotated in the opposite directions, thereby centering on the center line C. Turn. For example, when the self-propelled cleaner 1 reaches the periphery of the cleaning area or collides with an obstacle on the course, the driving wheel 29 stops and the left and right driving wheels 29 rotate in opposite directions to each other. change. Thereby, the self-propelled cleaner 1 can be self-propelled while avoiding obstacles in the entire installation place or the entire desired range.

<Side brush rotation mechanism>
FIG. 4 is a schematic cross-sectional view showing the rotation mechanism of the side brush in the first embodiment. 5A to 5C are diagrams for explaining the rotational motion of the side brush in the first embodiment, and FIGS. 6A to 6C are the rotational motion of the side brush subsequent to FIG. 5C. FIGS. 7A to 7C are diagrams illustrating the rotational movement of the side brush subsequent to FIG. 6C, and FIGS. 8A to 8C are FIGS. It is a figure explaining the rotational motion of the side brush following).

As shown in FIGS. 4 and 5, a side brush rotating mechanism M is provided at the side brush mounting position of the bottom plate 2 a of the housing 2 of the self-propelled cleaner 1.
The side brush rotation mechanism M is an internal gear fixed to the bottom surface of the housing 2 so as to be centered on the axis P1 of the rotation shaft 2a ₁ provided on the bottom surface side of the housing 2 of the self-propelled cleaner 1. and g1, a rotary shaft 2a ₁ eccentric shaft 2a ₁₁ coupled with to the eccentric and the rotation axis 2a _1, the external gear g2 which is attached to the eccentric shaft 2a ₁₁ to internal gear g1 mesh, external gear g2 And a side brush 10 connected to be integrally rotatable.

The rotating shaft 2a ₁ has an axis P1, and its lower end is integrated with the eccentric shaft 2a ₁₁ . Further, a hole for fitting the connecting shaft 2a ₃ is formed at the upper end of the rotating shaft 2a ₁ .
A box 2a ₂ is provided on the upper surface (inner surface) of the bottom plate 2a of the housing 2, and a connecting shaft 2a ₃ is pivotally attached to the box 2a ₂ . Lower end of the connecting shaft 2a ₃ is fitted into the hole of the upper end of the rotary shaft 2a _1, the connecting shaft 2a ₃ and the rotary shaft 2a ₁ are linked so as to rotate integrally.

Further, the connecting shaft 2a ₃ are fixed gear 2a ₄ for driving force transmission, is transmitted to the gear 2a ₄ via a gear torque of the motor for rotating the brush drive (not shown) is not shown, the gear 2a ₄ To the connecting shaft 2a ₃ and the rotating shaft 2a ₁ . In addition, the side brush 10 may be driven by a motor provided independently without rotating and sharing a motor for driving the rotary brush.

The side brush attachment position of the bottom plate 2a of the casing 2 self-propelled cleaning device 1 has a circular opening 2a ₅ centered provided the axis P1 of the rotary shaft 2a _1, the opening 2a ₅ An internal gear g1 is attached to the inner periphery of the. Therefore, the axis of the internal gear g1 is disposed on the axis P1 of the rotary shaft 2a ₁ . The external gear g2 meshes with the internal gear g1. At this time, the relationship between the number of teeth r of the internal gear g1 and the number of teeth s of the external gear g2 is 3r = 4s.

In the case of the first embodiment, the external gear g2 and a brush base portion 10a, which will be described later, of the side brush 10 are formed of a molded part that is integrally formed of resin. In this molded product, the axis of the external gear g2 and the center of gravity of the brush base 10a coincide with each other, and a through-hole 10c passing through the external gear g2 and the brush base 10a is formed on the axis of the external gear g2. Is formed. The eccentric shaft 2a ₁₁ is inserted into the external gear g2 meshed with the internal gear g1 and the through hole 10c of the brush base 10a. The external gear g2 and the brush base 10a may be a part integrated by metal processing.

Eccentric shaft 2a ₁₁ is an axis that is parallel to an eccentric with respect to axis P1 of the rotary shaft 2a _1, the upper end of the eccentric shaft 2a ₁₁ is integrated with the lower end of the rotary shaft 2a _1. That is, the rotating shaft 2a ₁ and the eccentric shaft 2a ₁₁ are formed of a molded part integrally formed of resin. Further, screw holes 2a ₁₂ is formed in the lower end surface of the eccentric shaft 2a _11. The rotating shaft 2a ₁ and the eccentric shaft 2a ₁₁ may be a component integrated by metal processing.

The side brush 10 includes a brush base portion 10a connected to the external gear g2 and three brush bristle bundles 10b implanted in the brush base portion 10a.
Brush base portion 10a is a portion corresponding to the vertex position of the regular triangle with the axial center P2 of the external gear g2 equidistant, have a spigot 10a ₁ of the proximal end of the three bristle bundle 10b is inserted doing.

In the case of Embodiment 1, the brush base portion 10a is a flat plate having a shape in which three sides of an equilateral triangle larger than the internal gear g1 bulge outward and three vertices are chamfered, and is inserted into these chamfered portions. The mouth 10a ₁ is formed to open obliquely downward. As a result, the three bristle bundles 10b project radially downward from the brush base 10a.

Together to mesh with the internal gear g1 the external gear g2, insert the eccentric shaft 2a ₁₁ into the through hole 10c of the external gear g2 and the brush base portion 10a, a washer W screws N into the screw hole 2a ₁₂ of the eccentric shaft 2a ₁₁ Screw and tighten. Thereby, the assembly of the side brush rotation mechanism M is completed. Incidentally, the brush base portion 10a and the external gear g2 is rotatable relative to the eccentric shaft 2a _11.

In the thus configured side brush rotating mechanism M, by the rotational force of the rotary shaft 2a _1, the external gear g2 and side brushes 10 revolve on axis P1 around. At this time, by the external gear g2 is meshed with the internal gear g1, external gear g2 and side brush 10 rotates the axis P2 around the eccentric shaft 2a _11.

Next, the operation of the side brush rotation mechanism M will be described with reference to FIGS. 5 to 9, in order to explain that the tip of each bristle bundle 10b of the side brush 10 performs a rotational movement along a generally square shape instead of a circular movement, the rotation shaft 2a ₁ is used. The side brush 10 is shown in the area of the square S as the center. 5 to 8 show the movement of the left side brush 10 in FIG.

As shown in FIGS. 4 and 5A, when the rotary shaft 2a ₁ rotates in the direction of arrow A, the eccentric shaft 2a ₁₁ (axial center P2) moves in the direction of arrow B. As a result, the external gear g2 meshed with the internal gear g1 revolves in the direction of arrow A around the rotation shaft 2a ₁ (axial center P1), and rotates in the direction of arrow B around the central axis P2. The following description will be made while paying attention to the rotational movement of the specific bristle bundle 10b (the left bristle bundle 10b in FIG. 5A) and the axis P2 of the side brush 10 in the side brush 10. Also, the four sides of the square S in FIGS. 5 to 9 are referred to as the left side s1, the front side s2, the right side s3, and the rear side s4.

As shown in FIG. 5 (A) ~ FIG 8 (C), about an axis of rotation 2a _1, the external gear g2 and side brush 10 is revolved in the direction of arrow A. During this time, the tip of the bristles 10b travels straight along the left side s1 of the square S toward the front side s2, as shown in FIGS. 5 (A) to (C), and FIGS. As shown in FIG. 7, it turns in the vicinity of the corner between the left side s1 and the front side s2 of the square S, and along the front side s2 of the square S, as shown in FIGS. Go straight to the right side s3. The tips of the other two brush bristle bundles 10b move in the same manner.

That is, the external gear g2 and the side brush 10 rotate around the axis P2 while revolving in the direction of the arrow A about the axis P1 of the rotation shaft 2a ₁ , and the tips of the brush bristle bundles 10b are approximately square S. Rotate along the shape. At this time, the external gear g2 and the side brush 10 rotate by 1/3 rotation during one rotation revolution. Such movement of the external gear g2 and the side brush 10 corresponds to the movement of the triangle of Rouleau.

  FIG. 9 is a conceptual diagram illustrating the rotational movement of the side brush in the first embodiment. As described with reference to FIGS. 5 to 8, according to the side brush rotation mechanism M in the present invention, the tips of the bristles 10 b of the side brush 10 go straight along the four sides s <b> 1 to s <b> 4 of the square S, and Can turn (turn) in the vicinity. In FIG. 9, the symbol ms represents the range in which the tip of the brush bristle bundle 10b goes straight, and the symbol mc represents the trajectory of the brush bristle bundle 10b turning.

  In FIG. 9, the symbol P represents the center of the square S, and the symbol C represents a circle inscribed with the four sides of the square S. In the conventional self-propelled cleaner, the tip of the bristle bundle of the side brush rotates around the center P along the circle C, whereas in the present invention, the tip of the bristle bundle 10b of the side brush 10 is approximately square S. Rotate along the shape of Therefore, according to this invention, the bristle bundle | flux 10b of the side brush 10 becomes easy to reach the back | inner corner of a room compared with the past, and the cleaning capability of a corner is improved.

(Other embodiments)
1. The external gear g2 and the brush base 10a may be separate parts. In this case, in order to make the movement of the brush base 10a the same as that of the external gear g2, these are bonded or connected by pins, screws or the like.
2. The rotating shaft 2a ₁ and the eccentric shaft 2a ₁₁ may be separate parts. Or may be an integrated part from the eccentric shaft 2a ₁₁ and the external gear g2 and the brush base 10a. In these cases, the lower end of the rotating shaft 2a ₁ and the upper end of the eccentric shaft 2a ₁₁ are connected by a connecting member, and the rotational force of the rotating shaft 2a ₁ is transmitted to the external gear g2 via the protruding piece and the eccentric shaft 2a _11. .

DESCRIPTION OF SYMBOLS 1 Self-propelled cleaner 2 Case 2a Bottom plate 2a ₁ Rotating shaft 2a ₁₁ Eccentric shaft 10 Side brush 10a Brush base part 10a ₁ Insertion port 10b Brush hair bundle g1 Internal gear g2 External gear N Screw M Side brush rotating mechanism P1 , P2 axis

Claims (5)

An internal gear fixed to the bottom surface of the housing so as to be centered on the axis of the rotary shaft provided on the bottom surface side of the housing of the self-propelled cleaner,
An eccentric shaft connected to the rotary shaft so as to be eccentric with the rotary shaft;
An external gear attached to the eccentric shaft so as to mesh with the internal gear;
A side brush connected to the external gear so as to be integrally rotatable,
The rotation of the side brush for a self-propelled cleaner, wherein the external gear and the side brush are configured to rotate around the axis of the eccentric shaft while revolving around the axis of the rotation shaft. mechanism.   The rotation mechanism of the side brush for a self-propelled cleaner according to claim 1, wherein the relationship between the number of teeth r of the internal gear and the number of teeth s of the external gear is 3r = 4s. The side brush has a brush base portion connected to the external gear, and three brush hair bundles implanted in the brush base portion.
The brush base portion has an insertion port into which the base ends of the three brush bristle bundles are inserted into a portion corresponding to the apex position of an equilateral triangle equidistant from the axis of the external gear. Item 3. A rotating mechanism of a side brush for a self-propelled cleaner according to item 1 or 2.   The rotation mechanism of the side brush for a self-propelled cleaner according to claim 3, wherein the brush base portion that rotates integrally with the external gear is formed in a size that prevents the internal gear from being exposed to the outside.   The self-propelled cleaner provided with the rotation mechanism of the side brush for self-propelled cleaners as described in any one of Claims 1-4.