JP7344110B2 - Suction mouth body and vacuum cleaner - Google Patents

Description

Embodiments according to the present invention relate to a suction port body and a vacuum cleaner.

A suction port body is known that includes a suction device main body having a suction port, a rotating brush disposed at the suction port, a motor that rotationally drives the rotating brush, and a safety switch that stops the motor when the suction device main body is turned upside down. It is being

The safety switch consists of a switch that controls the motor on and off, an operation piece that operates the switch depending on the grounding state to the surface to be cleaned, and a switch that protrudes freely from the bottom of the suction tool body to control the installation state on the surface to be cleaned. It includes a bracket and a rotating roller as a detecting section, and a stopper piece that prevents the detecting section from pressing the switch when the suction tool main body is reversed.

Japanese Patent Application Publication No. 08-332165

The conventional suction port body is equipped with a safety switch located on the left side or right side of the connecting pipe. This arrangement of the safety switch promotes imbalance between the left and right sides of the suction port centering on the connecting pipe. Imbalance between the left and right sides of the suction port impairs the usability of the suction port.

Therefore, in the conventional suction port body, the left-right imbalance has been solved by devising the arrangement of the components housed in the suction port body, such as the motor, the control board, and the safety switch. However, such an unbalance solution restricts the arrangement of each component and impairs the degree of freedom in designing the suction port body.

Further, by arranging the safety switch on the center line that divides the suction port body into left and right parts, it is possible to easily eliminate the imbalance between the left and right sides. However, on the center line of the suction port body, elements constituting the air passage within the suction port body, such as the suction port and the connecting pipe, occupy a large volume. Therefore, arranging the safety switch on the center line of the suction port increases the height of the suction port, making it less convenient to use in a gap such as under a bed. In addition, if we try to both arrange the safety switch on the center line of the suction port and avoid increasing the height of the suction port, the cross-sectional area of the air passage inside the suction port will decrease, and the The path shape becomes distorted and pressure loss increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a suction port body that has a small influence on the left-right balance and has a high degree of freedom in design, and a vacuum cleaner equipped with such a suction port body.

In order to solve the above problems, a suction port body according to an embodiment of the present invention includes a suction port body having a bottom surface having a suction port, a suction chamber connected to the suction port, and a suction port body that is rotatable to the suction port body. a rotary cleaning body supported; an electric motor housed in the suction port body to generate a driving force for the rotary cleaning body; and a pipe provided in the suction port body and fluidly connected to the suction chamber; A switch that opens and closes a power supply path connected to the electric motor and an amount of protrusion of the suction port body relative to a ground surface can be changed, and whether or not the suction port body is grounded with the suction port facing the surface to be cleaned. and if the detection unit detects that the suction port body is grounded with the suction port facing the surface to be cleaned, the switch is closed and the electric motor is turned off. An operating piece to be driven, a blocking part that prevents the operating piece from closing the switch when the suction port body is turned upside down , the detecting part, the operating piece, and the blocking part are rotationally integrated. and a shaft portion disposed between the pipe and the bottom plate of the suction port main body, and extending in a direction intersecting the pipe across the pipe in a plan view of the suction port main body. , the detection section is provided at one end of the shaft, and the operating piece and the blocking section are provided at the other end of the shaft.

Further, the vacuum cleaner according to the embodiment of the present invention includes a vacuum cleaner main body, an electric blower housed in the vacuum cleaner main body to generate negative pressure, and the suction port body fluidly connected to the electric blower. It is equipped with.

1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention. FIG. 2 is a perspective view showing the suction port body according to the embodiment of the present invention from the front right. FIG. 2 is a plan view of a suction port body according to an embodiment of the present invention. FIG. 2 is a plan view of a suction port body according to an embodiment of the present invention. FIG. 3 is a bottom view of the suction port body according to the embodiment of the present invention. FIG. 1 is a perspective view of a suction port body according to an embodiment of the present invention, viewed from below. 1 is a sectional view of a suction port body according to an embodiment of the present invention. 1 is a sectional view of a suction port body according to an embodiment of the present invention. FIG. 2 is a perspective view of an integrally molded member of a safety device for a suction port body according to an embodiment of the present invention. 1 is a sectional view of a suction port body according to an embodiment of the present invention. 1 is a sectional view of a suction port body according to an embodiment of the present invention.

Embodiments of a suction port body and a vacuum cleaner according to the present invention will be described with reference to FIGS. 1 to 11.

FIG. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

As shown in FIG. 1, the vacuum cleaner 1 according to the present embodiment is, for example, of a stick type. A secondary battery 13 (also referred to as a storage battery, a rechargeable battery, or a rechargeable battery) that can be attached to and removed from the vacuum cleaner body 12 , an extension tube 15 connected to the vacuum cleaner body 12 , and a suction port body 16 connected to the extension tube 15 . It is equipped with

Note that the vacuum cleaner 1 may be of a canister type, an upright type, or a handy type. The vacuum cleaner 1 may be a cordless type that includes a secondary battery 13 as a power source, or may be a wired type that obtains power from a commercial AC power source via a power cord.

The vacuum cleaner main body 12 includes a main body case 17 having a handle 11, an electric blower 18 housed in the main body case 17 to generate suction negative pressure, and a dust separation/collection part 19 detachably provided in the main body case 17. A main body control section 21 that mainly controls the electric blower 18 is provided.

The vacuum cleaner main body 12 drives an electric blower 18 using the electric power stored in the secondary battery 13, and applies negative pressure generated by driving the electric blower 18 to the extension tube 15. The vacuum cleaner 1 sucks air containing dust (hereinafter referred to as "dust-containing air") from the floor through the suction port body 16 and the extension pipe 15, separates the dust from the dust-containing air, and removes the dust after separation. It collects and accumulates dust and exhausts the separated air.

The main body case 17 includes a cylindrical front half 17a disposed on the extension line of the extension tube 15 in side view, and a rear half 17b bent from the front half 17a and gradually moving away from the extension line of the extension tube 15. ing. A dust separation and collection section 19 is provided above the front half 17a of the main body case 17. The rear half 17b of the main body case 17 extends rearward when the suction port body 16 is in use (FIG. 2) placed on the floor.

A main body connection port 23 is provided in the front part of the main body case 17.

The main body connection port 23 is a joint to which the extension tube 15 can be attached and detached. The main body connection port 23 projects from the cylindrical front half 17a of the main body case 17 toward the front. The main body connection port 23 is a fluid inlet of the cleaner main body 12, and fluidly connects the extension pipe 15 and the dust separation/collection section 19. By removing the extension tube 15 from the cleaner body 12, the body connection port 23 also functions as a suction port when the cleaner body 12 is used alone.

The handle 11 is provided integrally with the main body case 17. The handle 11 is a part that is held by the user's hand in order to clean the floor surface with the vacuum cleaner 1. The handle 11 extends in an arch shape from near the rear end of the dust separation/collection section 19 to the rear end of the main body case 17 . Moreover, the handle 11 is arranged to intersect with an extension line of the center line of the extension tube 15.

An input unit 26 is provided near the handle 11 and is disposed within a range where a user who grips the handle 11 can move his or her fingers.

The input unit 26 includes an operation start switch 26a that accepts an operation to start operation of the electric blower 18, an operation stop switch 26b that accepts an operation to stop operation of the electric blower 18, and an operation to start and stop power supply to the suction port body 16. It is equipped with a brush switch 26c that receives the brush switch 26c. The operation start switch 26a and the operation stop switch 26b are electrically connected to the main body control section 21. The user of the vacuum cleaner 1 can selectively select the operating mode of the electric blower 18 by operating the input unit 26. The operation start switch 26a also functions as an operation mode changeover switch while the electric blower 18 is in operation. In this case, the main body control section 21 switches the operation mode in the order of strong → medium → weak → strong → medium → weak → every time it receives an operation signal from the operation start switch 26a. In addition, the input unit 26 may be individually provided with a strong operation switch (not shown), a medium operation switch (not shown), and a weak operation switch (not shown) instead of the operation start switch 26a.

The dust separation/collection section 19 is arranged on the upper surface side of the cleaner body 12 and can be attached to and detached from the cleaner body 12. The dust separation and collection section 19 separates, collects, and accumulates dust from the dust-containing air flowing into the cleaner body 12, and sends clean air from which dust has been removed to the electric blower 18. The dust separation/collection unit 19 may be of a centrifugal separation type that centrifugally separates dust and air using the difference in mass between the dust and air sucked by the vacuum cleaner 1, or may be of a centrifugal separation type that centrifugally separates dust and air by using the difference in mass between the dust and air that the vacuum cleaner 1 sucks in. A filtration separation method having a filter for filtering out may be used.

The electric blower 18 sucks air from the dust separation and collection section 19 to generate negative pressure (suction negative pressure).

The main body control unit 21 includes a microprocessor and a storage device that stores various calculation programs executed by the microprocessor, parameters, and the like. The storage device stores various settings (arguments) related to a plurality of preset operation modes. The plurality of operating modes are associated with the output of the electric blower 18. Different input values (input value of the electric blower 18, target value of current flowing through the electric blower 18) are set for each operation mode. Each driving mode is associated with the operation input that the input unit 26 receives. The main body control unit 21 selectively selects an arbitrary operation mode corresponding to the operation input to the input unit 26 from a plurality of preset operation modes, reads out the settings of the selected operation mode from the storage unit, The electric blower 18 is operated according to the read operation mode setting.

The secondary battery 13 stores power consumed by the electric blower 18 and the main body control section 21 . The secondary battery 13 may be fixed to the main case 17 or may be detachable from the main case 17. In other words, the vacuum cleaner 1 may or may not be able to use the plurality of secondary batteries 13 by appropriately replacing them. When the charging rate of the secondary battery 13 detachably attached to the vacuum cleaner 1 decreases, the vacuum cleaner 1 can be replaced by a charged secondary battery 13. can continue driving.

The extension pipe 15 and the suction port body 16 suck dust on the floor together with air by the negative pressure applied from the electric blower 18 and guide it to the cleaner body 12 .

The extension pipe 15 is fluidly connected to the suction side of the electric blower 18 via the main body connection port 23 of the main body case 17 and the dust separation/collection section 19 . The extension tube 15 has a length that substantially reaches the floor surface when the user holds the handle 11 of the cleaner body 12. One end of the extension tube 15 is provided with a joint structure that can be detachably attached to the main body connection port 23 of the cleaner main body 12. The other end of the extension tube 15 is provided with a joint structure to which the suction port 16 of the cleaner body 12 can be attached and detached. The extension tube 15 may or may not be expandable.

The suction port body 16 can freely run or slide on a floor surface such as a wooden floor or a carpet, and has a suction port 27 on the bottom surface facing the floor surface in a running state or a sliding state. Further, the suction port body 16 includes a rotatable rotary cleaning body 28 arranged at the suction port 27 and an electric motor 29 as a drive source for driving the rotary cleaning body 28. A joint structure is provided at one end of the suction port body 16 and detachably connected to the other end of the extension tube 15. The suction port body 16 is fluidly connected to the suction side of the electric blower 18 via the extension pipe 15 . The suction port body 16, the extension pipe 15, and the dust separation/collection section 19 are a suction air path leading from the electric blower 18 to the suction port 27.

The vacuum cleaner 1 starts the electric blower 18 when the operation start switch 26a is operated. For example, in the vacuum cleaner 1, when the operation start switch 26a is operated while the electric blower 18 is stopped, the electric blower 18 is first started in the strong operation mode, and when the operation start switch 26a is operated again. The operation mode of the electric blower 18 is changed to the medium operation mode, and when the operation start switch 26a is operated three times, the operation mode of the electric blower 18 is changed to the weak operation mode, and the same process is repeated. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes that are set in advance. The input value to the electric blower 18 is the largest in the strong operation mode and the smallest in the weak operation mode. The electric blower 18 that has been started sucks air from the dust separation and collection section 19 and makes the inside of the dust separation and collection section 19 a negative pressure.

The negative pressure within the dust separation/collection section 19 acts on the suction port 27 through the main body connection port 23, the extension pipe 15, and the suction port body 16 in this order. The vacuum cleaner 1 uses negative pressure applied to the suction port 27 to suck in dust on the surface to be cleaned together with air, thereby cleaning the surface to be cleaned. The dust separation/collection section 19 separates and accumulates dust from the dust-containing air sucked into the vacuum cleaner 1 , while sending the air separated from the dust-containing air to the electric blower 18 . The electric blower 18 exhausts the air sucked in from the dust separation and collection section 19 to the outside of the cleaner body 12.

Next, the suction port body 16 will be explained in detail.

FIG. 2 is a perspective view showing the suction port body according to the embodiment of the present invention from the right front.

As shown in FIG. 2, the suction port body 16 according to the present embodiment includes a substantially rectangular parallelepiped suction port body 31 and a connecting pipe portion 32 provided at the rear of the suction port body 31. As shown in FIG.

Note that the front and rear, left and right, and upper and lower sides of the suction port body 16 will be explained based on the user of the vacuum cleaner 1. The direction of the solid arrow X in FIG. 2 is the front or forward direction of the suction port body 16, and the opposite direction is the rear or backward direction. Further, the direction of the solid arrow Y in FIG. 2 is to the left of the suction port body 16, and the opposite direction is to the right. Furthermore, the direction of the solid arrow Z in FIG. 2 is above the suction port body 16, and the opposite direction is below.

The shape of the suction port main body 31 in plan view is a rectangular shape having short sides in the front-rear direction and long sides in the left-right direction. That is, the left-right dimension, ie, the width dimension, of the suction port body 31 is larger than the front-back dimension, ie, the depth dimension, of the suction port body 31. The suction port body 31 includes a lower case 35 and an upper case 36 that covers the lower case 35.

The connecting pipe portion 32 is provided at the rear of the suction port body portion 31 and approximately at the center in the width direction. The connecting tube section 32 includes a rotating connecting tube section 38 that is rotatable with respect to the suction port main body section 31 and a swinging connecting tube section 39 that is swingable with respect to the rotating connecting tube section 38 .

The rotary connection pipe portion 38 rotates around a center line (a line segment that coincides with the X-axis or a line segment that is parallel to the X-axis) extending in the front-rear direction of the suction port body 16. This center line divides the suction port main body portion 31 into left and right halves.

The swinging connecting tube section 39 swings around a line segment perpendicular to the rotation center line of the rotating connecting tube section 38 or around a line segment parallel to this line segment. The free end of the swing connecting tube section 39 is a joint that can be attached to and detached from the free end of the extension tube 15 .

3 and 4 are plan views of the suction port body according to the embodiment of the present invention.

FIG. 5 is a bottom view of the suction port body according to the embodiment of the present invention.

FIG. 6 is a perspective view of the suction port body according to the embodiment of the present invention, viewed from below.

FIG. 7 is a longitudinal cross-sectional view of the suction port body according to the embodiment of the present invention, taken along line VII-VII in FIG. 3.

Note that in FIG. 4, the upper case 36 is removed.

As shown in FIGS. 3 to 7, the suction port body 16 according to the present embodiment includes a suction port main body 31, a rotary cleaning body 28 rotatably supported by the suction port main body 31, and a suction port main body 31. 31 as a drive source that generates the rotational driving force of the rotating cleaning body 28; a power transmission mechanism 41 that transmits the driving force from the electric motor 29 to the rotating cleaning body 28; and a power transmission mechanism 41 that controls the operation of the electric motor 29. A suction port control section 42 is provided.

In addition, the suction port body 16 includes a safety device 43 that stops the electric motor 29 when the suction port body 16 separates from the surface to be cleaned or the suction port body 16 is turned upside down.

Furthermore, the suction port main body portion 31 has a suction port 27 that opens toward the bottom surface 31a, a suction chamber 45 connected to the suction port 27, and a cleaning body chamber 46 in which the rotary cleaning body 28 is accommodated.

The cleaning body chamber 46 is partitioned outside the suction chamber 45. The cleaning body chamber 46 is open toward the bottom surface of the suction port body 31.

The suction chamber 45 includes a lower case 35 , an air passage cover 48 that is housed inside the upper case 36 and covers a part of the lower case 35 , and a suction port 27 that is wide in the left and right direction of the suction port body 31 . The air passage constrictor 49 narrows the air passage toward the center.

A plurality of rollers 50 are provided on the bottom surface 31a of the suction port main body 31 to ground the surface f to be cleaned and support the suction port main body 31. The plurality of rollers 50 include rollers 50 disposed at the left and right ends of the suction port main body 31, and rollers 50 disposed at the rear central portion of the suction port main body 31.

A space is defined between the lower case 35 and the upper case 36 of the suction port main body part 31. This space houses a motor room 51 in which the electric motor 29 is housed, a machine room 52 in which the power transmission mechanism 41 is housed, a control room 53 in which the suction port control unit 42 is housed, and a safety device 43. A safety equipment room 55 is included. These motor room 51, machine room 52, control room 53, and safety equipment room 55 may be connected or separated.

The control chamber 53 is arranged at the center of the suction port body 31 in the front, rear, left and right directions when viewed from above.

The safety device chamber 55 is disposed at the rear of the suction port main body 31 and is provided on each of the left and right sides of the rotary connecting tube portion 38 so as to sandwich the rotary connecting tube portion 38 of the connecting tube portion 32 .

The suction port body 31 includes a pair of rotating cleaning bodies 28 so as to sandwich the suction port 27 from the front and rear of the suction port body 16 .

There is also a pair of electric motors 29 and power transmission mechanisms 41, each corresponding to each rotary cleaning body 28 individually. The pair of electric motors 29 include an electric motor 29 provided at one end of the suction port main body 31 in the width direction, and an electric motor 29 provided at the other end of the suction port main body 31 in the width direction. . It is preferable that the pair of electric motors 29 be disposed at substantially the same distance from a center line that bisects the suction port body 31 into left and right halves. The pair of power transmission mechanisms 41 includes a power transmission mechanism 41 provided at one end in the width direction of the suction port main body 31 and a power transmission mechanism 41 provided at the other end in the width direction of the suction port main body 31. Contains. It is preferable that these pair of power transmission mechanisms 41 are arranged at locations substantially the same distance away from a center line that bisects the suction port main body portion 31 into left and right halves.

The rotary cleaning body 28 on the front side of the suction port 27 is called a front cleaning body 28F (first rotary cleaning body). The cleaning body chamber 46 in which the front cleaning body 28F is accommodated is called a front cleaning body chamber 46F (first rotating cleaning body chamber). The electric motor 29 corresponding to the front cleaning body 28F is called a front electric motor 29F, and the power transmission mechanism 41 corresponding to the front cleaning body 28F is called a front transmission mechanism 41F. The motor chamber 51 in which the front motor 29F is housed is called a front motor room 51F, and the machine room 52 in which the front transmission mechanism 41F is housed is called a front machine room 52F.

The rotary cleaning body 28 located behind the suction port 27 is referred to as a rear cleaning body 28R (second rotary cleaning body). The cleaning body chamber 46 in which the rear cleaning body 28R is accommodated is called a rear cleaning body chamber 46R (second rotating cleaning body chamber). The electric motor 29 corresponding to the rear cleaning body 28R is called a rear electric motor 29R, and the power transmission mechanism 41 corresponding to the rear cleaning body 28R is called a rear transmission mechanism 41R. The motor room 51 in which the rear electric motor 29R is housed is called a rear motor room 51R, and the machine room 52 in which the rear transmission mechanism 41R is housed is called a rear machine room 52R.

The front cleaning body chamber 46F, the suction port 27, and the rear cleaning body chamber 46R are lined up in the direction of movement of the suction port body 16. In other words, the front cleaning body 28F, the suction port 27, and the rear cleaning body 28R are lined up in the direction of movement of the suction port body 16. The front cleaning body 28F, the suction port 27, and the rear cleaning body 28R are arranged from the front side to the rear side of the suction port body 16. Further, the front cleaning body 28F, the air passage narrowing body 49, and the rear cleaning body 28R are arranged in the direction in which the suction port body 16 moves. The front cleaning body chamber 46F, the suction port 27, and the rear cleaning body chamber 46R have substantially the same width dimension.

The suction port 27 is arranged between the front cleaning body chamber 46F and the rear cleaning body chamber 46R. In other words, the suction port 27 is arranged between the front cleaning body 28F and the rear cleaning body 28R.

The suction chamber 45 is curved toward the rear of the suction port main body part 31 along the lower case 35 so as to cover the post-cleaning body chamber 46R, and is connected to the connecting pipe part 32. A relay pipe 57 is provided between the suction chamber 45 and the connecting pipe section 32. The relay pipe 57 plays the role of a base that supports the connecting pipe section 32. The relay pipe 57 is integrally formed with the air passage cover 48.

The pre-cleaning body chamber 46F is partitioned by the upper case 36, the lower case 35, and the air passage narrowing body 49. The post-cleaning body chamber 46R is partitioned by the lower case 35 and the air passage narrowing body 49.

The machine chamber 52 is located at each of the left and right ends of the suction port main body portion 31, and is partitioned into a portion where the front cleaning body chamber 46F, the suction port 27, and the rear cleaning body chamber 46R are not present. The machine room 52 accommodates the shaft end of the front cleaning body 28F and the shaft end of the rear cleaning body 28R. A roller 50 is provided at the bottom of the machine room 52.

The front machine chamber 52F is located at the left end of the suction port main body portion 31, and is divided into a portion where the front cleaning body chamber 46F, the suction port 27, and the rear cleaning body chamber 46R are not present. The front machine room 52F accommodates the shaft end of the front cleaning body 28F and the shaft end of the rear cleaning body 28R.

The rear machine chamber 52R is located at the right end of the suction port main body portion 31, and is partitioned into a portion where the front cleaning body chamber 46F, the suction port 27, and the rear cleaning body chamber 46R are not present. The rear machine room 52R accommodates the shaft end of the front cleaning body 28F and the shaft end of the rear cleaning body 28R.

The motor chamber 51 overlaps the front cleaning body chamber 46F, the suction port 27, and the rear cleaning body chamber 46R in plan view, and is arranged between the control chamber 53 and the machine room 52. In side view, the rotation center line of the front cleaning body 28F, the rotation center line of the rear cleaning body 28R, and the rotation center line of the electric motor 29 are located at the respective vertices of the triangle. The motor chamber 51 houses the cylindrical electric motor 29 as close as possible to the front cleaning chamber 46F and the rear cleaning chamber 46R. That is, the bottom of the electric motor 29 is located below the top of the front cleaning body 28F and the top of the rear cleaning body 28R. The arrangement of the electric motor 29 and the configuration of the electric motor chamber 51 are such that even when the electric motor 29 is arranged above the rotary cleaning body 28, the height of the suction port main body 31 can be adjusted to the height of the rotary cleaning body 28. (diameter) and the height (diameter) of the electric motor 29.

The front motor room 51F is located on the left side of the suction port main body 31 and is attached to the front machine room 52F.

The rear motor room 51R is located on the right side of the suction port main body 31 and is attached to the rear machine room 52R.

In addition, if the front motor room 51F and the front machine room 52F are provided together, the front motor room 51F and the front machine room 52F may be arranged on the right side of the suction port main body part 31. In this case, the front transmission mechanism 41F is also arranged on the right side of the suction port main body part 31. The rear electric motor chamber 51R, the rear machine chamber 52R, and the rear transmission mechanism 41R are arranged on the left side of the suction port body 31.

The rotation center line of the rotary cleaning body 28 is oriented in the width direction of the suction port body 31. The rotating cleaning body 28 has brush bristles 59 extending radially. The brush bristles 59 are a plurality of brushes that extend in the longitudinal direction of the rotary cleaning body 28 and are arranged in the circumferential direction of the rotary cleaning body 28 .

The electric motor 29 includes an output shaft 29a that projects into the machine room 52. The rotation center line of the output shaft 29a is substantially parallel to the rotation center line of the rotary cleaning body 28. The electric motor 29 rotates the rotary cleaning body 28 in a direction to sweep up dust toward the suction port 27 . Note that the suction port body 16 may be provided with a drive source for the rotary cleaning body 28 instead of the electric motor 29, such as a fan or a turbine rotated by air sucked in by negative suction pressure.

The power transmission mechanism 41 includes a main drive gear 61 fixed to the output shaft 29 a of the electric motor 29 , a driven gear 62 provided on the rotating cleaning body 28 , and a drive gear 61 and the driven gear 62 that are wound around the drive gear 61 and the driven gear 62 to rotate from the electric motor 29 . An endless belt 63 that transmits driving force to the cleaning body 28 is provided.

The suction port controller 42 operates the electric motor 29 using electric power supplied from the cleaner body 12 through the extension pipe 15 .

The air passage narrowing body 49 includes a partition wall 65 that partitions the suction chamber 45 and the cleaning body chamber 46 and defines a part of the edge of the suction port 27 , and a dust removal part that protrudes from the edge of the partition wall 65 and contacts the rotating cleaning body 28 . A protrusion 66 is provided.

The partition wall 65 that partitions the suction chamber 45 and the front cleaning body chamber 46F is called a front partition wall 65F (first partition wall). The front partition wall 65F defines the front edge of the suction port 27. The dust removal protrusion 66 that protrudes from the edge of the front partition wall 65F and contacts the front cleaning body 28F is referred to as a front protrusion 66F (first dust removal protrusion).

The partition wall 65 that partitions the suction chamber 45 and the rear cleaning body chamber 46R is called a rear partition wall 65R (second partition wall). The rear partition wall 65R defines the rear edge of the suction port 27. The dust removal protrusion 66 that protrudes from the edge of the rear partition wall 65R and contacts the rear cleaning body 28R is referred to as a rear protrusion 66R (second dust removal protrusion).

A part of the inner surface of the suction chamber 45 (here, the inner surface on the rear side of the suction chamber 45, the first remainder of the inner surface of the suction chamber 45) faces the front partition wall 65F and has an arcuate shape that is convex toward the front partition wall 65F. It has a curved surface 68. The curved surface 68 includes the inner surface of the rear partition wall 65R and the surface of the lower case 35 that is continuous with the inner surface of the rear partition wall 65R. The lower case 35 has an arc-shaped wall that partitions the post-cleaning chamber 46R. This wall has a substantially uniform thickness and concentrically surrounds the rear cleaning body 28R, and is smoothly continuous with the inner surface of the rear partition wall 65R.

Dust swept up by the rotation of the front cleaning body 28F heads toward the curved surface 68 of the suction chamber 45. The curved surface 68 smoothly guides flying dust to the back side (downstream side) of the suction chamber 45.

Further, a part of the inner surface of the suction chamber 45 (here, the inner surfaces on the left and right sides of the suction chamber 45, and the second remaining portion of the inner surface of the suction chamber 45) is connected to the partition wall 65, and is connected to the inner surface of the suction chamber 45. It has a funnel-shaped inclined surface 71 that narrows the air passage width toward the downstream side. The inclined surface 71 is connected to the front partition wall 65F and the rear partition wall 65R. That is, the inclined surface 71 spans between the front partition wall 65F and the rear partition wall 65R. A pair of inclined surfaces 71 are provided on the left and right sides of the air passage narrowing body 49 . The left and right inclined surfaces 71 are inclined so as to be further away from the corresponding ends of the air passage narrowing body 49 and deeper into the suction chamber 45 as they approach the center. The left and right inclined surfaces 71 are separated from each other without merging. The gap between the left and right sloped surfaces 71 is connected to the suction chamber 45 on the back side of the sloped surface 71. The inclined surface 71 smoothly guides the air sucked in from the suction port 27, which is elongated in the width direction of the suction port body 16, to the back side of the suction chamber 45 connected to the connecting pipe portion 32.

The inclined surface 71 has a stepped shape including a guide surface 72 facing the partition wall 65 in a longitudinal cross-sectional view of the suction port body 31 . The guide surface 72 faces the front partition wall 65F. This step-shaped portion may be a single step as shown in FIG. 7, or may have multiple steps. Preferably, the staircase shape reaches the entire width of the inclined surface 71. The bottom of each step may be flat or recessed. It is preferable that the guide surface 72 is parallel to the front partition wall 65F. The guide surface 72 captures the dust swept up by the front cleaning body 28F and guides it to the back side of the suction chamber 45. In addition, the guide surface 72 has an intermediate portion caught between the front cleaning body 28F and the surface to be cleaned f, and one or both ends of the thread-shaped dust floating toward the suction port 27 can climb over the rear partition wall 65R. The end of the filamentous dust is guided to the back side of the suction chamber 45 so that it does not approach the rear cleaning body 28R side.

The dust removal protrusion 66 is inserted inside the rotation locus of the rotary cleaning body 28. The dust removal protrusion 66 flicks the brush bristles 59 of the rotary cleaning body 28 as the rotary cleaning body 28 rotates. At this time, the dust removal protrusion 66 flicks off the thread-like dust that adheres to the rotary cleaning body 28 and tries to enter the cleaning body chamber 46 from the brush bristles 59 and separates it from the rotary cleaning body 28. The thread-like dust separated from the rotating cleaning body 28 is easily sucked into the suction port 27. In other words, the dust removal protrusion 66 can prevent the thread-like dust attached to the rotary cleaning body 28 from entering the cleaning body chamber 46 .

It is preferable that the dust removal protrusion 66 is provided over the entire width of the partition wall 65. The dust removal protrusion 66 only needs to be able to bend the brush bristles 59 of the rotary cleaning body 28. Therefore, the shape of the dust removal protrusion 66 may be a comb shape as shown in FIGS. 5 and 6, or may be a plate shape with a uniform protrusion length over the entire width. Since the rotational resistance of the rotary cleaning body 28 increases when the dust removal projections 66 come into contact with each other, the shape of the dust removal projections 66 is appropriately set according to the output of the electric motor 29 .

If the ground plane of the suction port body 16 is the reference plane, the front projection 66F is substantially parallel to the reference plane. The rear projection 66R is inclined and protrudes in a direction away from the reference plane.

Generally, the user moves the suction port body 16 forward to cause the suction port body 16 to enter the uncleaned surface f to be cleaned. At this time, the thread-like dust on the surface f to be cleaned moves from the front to the rear of the suction port body 16. The inventor made the front protrusion 66F substantially parallel to the reference plane while tilting the rear protrusion 66R in a direction away from the reference plane, thereby preventing thread-like dust from entering the front cleaning body chamber 46F and the rear cleaning body chamber 46R. We found that it becomes difficult to enter both.

Further, the rear partition wall 65R has a hole 73 that connects the suction chamber 45 and the rear cleaning body chamber 46R. The hole 73 is arranged in a range sandwiched between the left and right inclined surfaces 71. There may be a plurality of holes 73. The hole 73 discharges dust that has entered the post-cleaning body chamber 46R to the suction chamber 45 so that it does not remain in the post-cleaning body chamber 46R.

Note that the dust that has entered the front cleaning body chamber 46F is discharged to the front of the suction port body 16 as the front cleaning body 28F rotates. That is, the dust that has entered the front cleaning body chamber 46F has a greater chance of being sucked into the suction port 27 while the suction port body 16 is moving forward than the dust that has entered the rear cleaning body chamber 46R. Therefore, the front partition wall 65F does not need to have the hole 73 like the rear partition wall 65R.

A protrusion 75 having an acute vertical cross-sectional shape toward the rear cleaning body 28R is provided at a part of the opening edge of the rear cleaning body chamber 46R and facing the rear projection 66R. The protrusion 75 is provided at the rear side of the opening edge of the rear cleaning body chamber 46R. When the suction port body 16 is used on a soft surface to be cleaned f such as a carpet, the suction port main body portion 31 sinks into the surface to be cleaned f. In such a case, the protrusion 75 stirs the surface f to be cleaned like a bulldozer blade and scrapes out the dust that has entered the carpet.

It is preferable that the protruding portion 75 extends over the entire width of the rear cleaning body chamber 46R. Further, when the suction port body 16 is used on a hard surface f to be cleaned such as a flooring, the protruding portion 75 extends downward from the suction port body 31 within a range that does not touch the surface f to be cleaned. It may protrude beyond the bottom surface of the portion 31.

Next, the safety device 43 of the suction port body 16 will be explained in detail.

FIG. 8 is a cross-sectional view of the suction port body according to the embodiment of the present invention taken along line VIII-VIII in FIG. 3.

FIG. 9 is a perspective view of an integrally molded member of the safety device for the suction port body according to the embodiment of the present invention.

In addition to FIG. 4, as shown in FIGS. 8 and 9, the safety device 43 of the suction port body 16 according to the present embodiment includes a switch 81 that opens and closes the power supply path connected to the electric motor 29, and a suction port body 31. A detection unit 82 that can change the amount of protrusion from the bottom surface 31a and detects whether or not the suction port main body 31 is in contact with the ground with the bottom surface 31a facing the surface f to be cleaned; If the detection unit 82 detects that the switch 82 is facing toward the surface to be cleaned f and is grounded, the operation piece 83 that closes the switch 81 and drives the electric motor 29 and the suction port body 31 are reversed. In this case, a blocking part 85 that prevents the operating piece 83 from closing the switch 81, a shaft part 86 that rotationally integrates the detecting part 82, the operating piece 83, and the blocking part 85, and the bottom surface of the suction port body part 31. The elastic member 87 applies force to the detection part 82 in the direction protruding from the detection part 31a.

The detection section 82 is provided at one end of the shaft section 86. The detection unit 82 is housed in either the safety device chamber 55 on the right side or the safety device chamber 55 on the left side of the connecting pipe portion 32 . The detection section 82 is housed, for example, in the safety device chamber 55 on the right side of the connection pipe section 32. The detection section 82 includes a bracket 91 provided at one end of the shaft section 86 , a support shaft 92 provided on the bracket 91 , and a roller 93 rotatably supported by the bracket 91 via the support shaft 92 . We are prepared.

The blocking portion 85 is provided at the other end of the shaft portion 86 together with the operating piece 83 . The blocking portion 85 is housed in the other of the right safety device chamber 55 and the left safety device chamber 55 of the connecting tube portion 32 together with the operating piece 83 . The blocking portion 85 is housed, for example, in the safety device chamber 55 on the left side of the connecting pipe portion 32. The blocking portion 85 includes a substantially U-shaped stopper piece 95 provided at the other end of the shaft portion 86 and a sphere 96 that is movable in the vertical direction of the suction port body portion 31 by its own weight.

The stopper piece 95 protrudes from the shaft portion 86 in an arm shape. The stopper piece 95 has a base end 95a that is one end of a U-shape and is fixed to the shaft portion 86, and a free end 95b that is the other end of the U-shape. There is.

The sphere 96 is made of metal, for example, stainless steel, and has much higher strength than the stopper piece 95 of the synthetic resin blocking part 85.

The operating piece 83 is provided at the other end of the shaft portion 86 together with the blocking portion 85 . The operating piece 83 is housed in the other of the right safety device chamber 55 and the left safety device chamber 55 of the connecting pipe portion 32 together with the blocking portion 85 . The operating piece 83 is housed, for example, in the safety device chamber 55 on the left side of the connecting pipe section 32. The operation piece 83 is closer to the other end of the shaft portion 86 than the stopper piece 95 of the blocking portion 85 and is attached to the stopper piece 95 . The operation piece 83 rotates in conjunction with the movement of the roller 93 being pushed toward the suction port main body 31 by the surface f to be cleaned when the suction port body 16 is grounded on the surface f to be cleaned, Close.

The shaft portion 86 is rotatably supported by the suction port body portion 31. The shaft portion 86 is disposed between the connecting pipe portion 32 and the bottom plate 31b of the suction port main body portion 31, and extends across the connecting pipe portion 32 in a direction intersecting the connecting pipe portion 32 in a plan view of the suction port main body portion 31. It is extending. The shaft portion 86 is arranged directly below the connecting portion between the connecting pipe portion 32 and the relay pipe 57. The shaft portion 86 spans between the safety device chamber 55 on the right side and the safety device chamber 55 on the left side of the connecting pipe portion 32.

The torsional strength of the shaft portion 86 is higher than the torsional strength of the detection portion 82 and the torsional strength of the operating piece 83. Further, the torsional rigidity of the shaft portion 86 is higher than the torsional rigidity of the detection portion 82 and the torsional rigidity of the operating piece 83.

The bracket 91 of the detection part 82, the operation piece 83, the stopper piece 95 of the blocking part 85, and the shaft part 86 are rotationally integrated by an integrally molded member 99. The bracket 91 of the detection part 82, the operation piece 83, and the stopper piece 95 of the blocking part 85 are made of, for example, synthetic resin. The shaft portion 86 is made of metal, such as stainless steel, which has extremely high strength and shear modulus (rigidity) compared to the bracket 91 of the detection portion 82, the operation piece 83, and the stopper piece 95 of the blocking portion 85, which are made of synthetic resin. It has an axis itself or an axis.

The integrally molded member 99 is a molded product in which a metal shaft portion 86 is insert-molded into the bracket 91 of the detection portion 82, the operation piece 83, and the stopper piece 95 of the blocking portion 85, which are made of synthetic resin, for example. The shaft portion 86 may be covered with synthetic resin or may not be covered. Note that the bracket 91 of the detection section 82, the operation piece 83, the stopper piece 95 of the blocking section 85, and the shaft section 86 may be rotatably coupled together by a mechanical element such as a key, for example.

The elastic member 87 is, for example, a torsion spring. The elastic member 87 is hooked onto a spring receiving portion provided at an appropriate location on the integrally molded member 99 and a spring receiving portion provided at an appropriate location on the suction port body portion 31 . The elastic member 87 stores energy when the detection section 82 is pushed in from the maximum protrusion position, consumes this energy, and causes the detection section 82 to protrude. Furthermore, even when the suction port body 16 is turned upside down and the bottom surface 31a of the suction port body 16 is directed upward, the elastic member 87 is able to prevent the bracket 91, which is an integrally molded member 99, the operating piece 83, the stopper piece 95, and The shaft portion 86, support shaft 92, and roller 93 are supported so that they do not rotate under their own weight. Therefore, it is preferable that an appropriate preload is applied to the elastic member 87.

FIG. 10 is a cross-sectional view of the suction port body according to the embodiment of the present invention taken along line XX in FIG. 3. FIG.

As shown in FIG. 10, when the suction port body 16 is grounded on the surface f to be cleaned with the bottom surface 31a facing the surface f to be cleaned, the surface f to be cleaned resists the force generated by the elastic member 87. The roller 93 is pushed toward the suction port body portion 31. The movement of the roller 93 rotates the shaft section 86 via the support shaft 92 and bracket 91 of the detection section 82 . This rotation of the shaft portion 86 rotates the operation piece 83 and the stopper piece 95 of the blocking portion 85. The elastic member 87 is deformed by the rotation of the shaft portion 86 and stores energy.

The rotated operation piece 83 closes the switch 81 and enables a power supply path to the electric motor 29. If the switch 81 is in a closed state and the brush switch 26c is operated and power is being supplied to the suction port body 16, power is supplied to the electric motor 29 and the electric motor 29 is driven. Then, the rotary cleaning body 28 rotates.

Further, the rotated stopper piece 95 directs the U-shaped open portion in the horizontal direction. The sphere 96 of the blocking portion 85 is captured inside the U-shaped stopper piece 95 (concave portion).

Next, when the suction port body 16 leaves the surface f to be cleaned with the bottom surface 31a facing the surface f to be cleaned, the elastic member 87 is restored, and the roller 93 is axially moved in the direction of protruding from the suction port body 31. The section 86 rotates. This rotation of the shaft portion 86 rotates the operation piece 83, the stopper piece 95 of the blocking portion 85, and the bracket 91 of the detection portion 82.

The rotated bracket 91 causes the roller 93 to protrude from the suction port main body part 31. At this time, the protruding position of the detection unit 82 reaches the maximum protruding position.

Further, the rotated operation piece 83 opens the switch 81 and cuts off the power supply to the electric motor 29. When the switch 81 is opened, even if the brush switch 26c is operated and power is being supplied to the suction port body 16, the power supply to the electric motor 29 is cut off. Then, the electric motor 29 stops, and the rotating cleaning body 28 stops.

Further, the U-shaped open portion of the rotated stopper piece 95 faces upward. When the U-shaped open portion faces upward, the sphere 96 can escape from the inside (concave portion) of the U-shaped stopper piece 95. In other words, the sphere 96 becomes movable upward.

FIG. 11 is a cross-sectional view of the suction port body according to the embodiment of the present invention taken along line XX in FIG. 3. FIG.

As shown in FIG. 11, when the suction port body 16 is turned upside down and the bottom surface 31a of the suction port body 16 is directed upward, the elastic member 87 supports the rotation of the shaft portion 86, and the rollers 93 act on the suction port body. Maintain the state protruding from 31. At this time, the sphere 96 slips out from inside the U-shaped stopper piece 95 due to its own weight. The sphere 96 that has come out from inside the stopper piece 95 is moved to a rotation prevention position (FIG. 10) where rotation of the stopper piece 95 is prevented by a wall that is appropriately provided in the suction port body 31 and restricts the movement range of the sphere 96. will be placed in When an external force that pushes the roller 93 into the suction port body 31 acts on the detection unit 82, the sphere 96 placed at the rotation blocking position hits the free end 95b of the stopper piece 95 and prevents the shaft 86 from rotating. prevent. Then, the operation piece 83, the stopper piece 95 of the blocking part 85, and the bracket 91 of the detecting part 82 are prevented from rotating.

The operation piece 83 whose rotation is prevented maintains the switch 81 in an open state. Then, the electric motor 29 continues to stop, and the rotary cleaning body 28 continues to stop.

As described above, the suction port body 16 and the vacuum cleaner 1 according to the present embodiment are arranged between the connecting pipe portion 32 and the bottom plate 31b of the suction port body portion 31, and are arranged in a plan view of the suction port body portion 31. A shaft part 86 extending across the connecting pipe part 32 in a direction intersecting the connecting pipe part 32, a sensing part 82 provided at one end of the shaft part 86, and a detecting part 82 provided at the other end of the shaft part 86. It includes an operation piece 83 and a blocking part 85. Such a safety device 43 suppresses the imbalance of the suction port body 31 around the X axis, that is, the left-right imbalance of the suction port body 31 . Therefore, the suction port body 16 and the vacuum cleaner 1 reduce the degree of contribution of the safety device 43 to the left-right imbalance of the suction port body 31, and reduce the contribution of the safety device 43 to the left and right imbalance of the suction port body 16, such as the electric motor 29, power transmission, etc. The restrictions on the arrangement of the mechanism 41 and the suction port body control section 42 are relaxed, and the degree of freedom in designing the suction port body 16 is improved. Further, such a safety device 43 prevents an increase in the height of the suction port main body 31 and does not damage the shape of the connecting pipe portion 32 that constitutes the air path. Therefore, the suction port body 16 and the vacuum cleaner 1 can secure a sufficient air passage cross-sectional area without impairing usability.

In addition, the suction port body 16 and the vacuum cleaner 1 according to the present embodiment include an electric motor 29 provided at one end in the width direction of the suction port body 31, and a motor 29 provided at the other end in the width direction of the suction port body 31. A pair of electric motors 29 are provided. These electric motors 29 have the largest mass among the components accommodated in the suction port body 16. Therefore, the suction port body 16 and the vacuum cleaner 1 reduce the contribution to the left-right imbalance of the suction port body 31 caused by the safety device 43, and reduce the contribution to the left-right imbalance of the suction port main body 31 caused by the electric motor 29. By lowering the degree of contribution, the degree of freedom in designing the suction port body 16 is improved.

Furthermore, the suction port body 16 and the vacuum cleaner 1 according to the present embodiment include a shaft portion 86 having higher torsional strength than the torsional strength of the detection portion 82 and the torsional strength of the operating piece 83. Therefore, the suction port body 16 and the vacuum cleaner 1 are configured to push the roller 93 into the suction port main body 31 with the suction port main body 31 upside down and the blocking portion 85 blocking the rotation of the shaft portion 86. Even if an overload is applied to the shaft portion 86, the shaft portion 86 will not be damaged. In addition, in the suction port body 16 and the vacuum cleaner 1, the positional relationship between the operation piece 83 and the detection unit 82 (positional relationship around the rotation center of the shaft portion 86) is disrupted due to the torsion angle of the shaft portion 86, and the switch 81 This prevents the switch from being accidentally closed or the switch 81 from being opened by mistake.

Further, the suction port body 16 and the vacuum cleaner 1 according to the present embodiment include a shaft portion 86 made of stainless steel. Therefore, the suction port body 16 and the vacuum cleaner 1 can easily and inexpensively increase the strength and torsional rigidity of the shaft portion 86.

Furthermore, the suction port body 16 and the vacuum cleaner 1 according to the present embodiment include an integrally molded member 99 that rotationally integrates the detection section 82, the operation piece 83, the blocking section 85, and the shaft section 86. Therefore, the suction port body 16 and the vacuum cleaner 1 can easily employ an integrally molded member 99 having, for example, a stainless steel rod as the shaft portion 86 itself or the core material of the shaft portion 86.

Therefore, according to the suction port body 16 according to the present embodiment, the influence on the left-right balance can be reduced and the degree of freedom in design can be improved. Moreover, the vacuum cleaner 1 can be provided with such a suction port body 16.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

DESCRIPTION OF SYMBOLS 1... Vacuum cleaner, 11... Handle, 12... Vacuum cleaner main body, 13... Secondary battery, 15... Extension tube, 16... Suction mouth body, 17... Main body case, 17a... First half, 17b... Second half, 18... Electric blower, 19...Dust separation/collection unit, 21...Main body control part, 23...Main body connection port, 26...Input part, 26a...Operation start switch, 26b...Operation stop switch, 26c...Brush switch, 27...Suction port, 28... Rotating cleaning body, 28F... Front cleaning body, 28R... Rear cleaning body, 29... Electric motor, 29a... Output shaft, 29F... Front electric motor, 29R... Rear electric motor, 31... Suction port main body, 31a... Bottom surface, 31b...Bottom plate, 32...Connection tube section, 35...Lower case, 36...Upper case, 38...Rotation connection tube section, 39...Swing connection tube section, 41...Power transmission mechanism, 41F...Front transmission mechanism, 41R... Rear transmission mechanism, 42... Suction port control unit, 43... Safety device, 45... Suction chamber, 46... Cleaning body chamber, 46F... Front cleaning body chamber, 46R... Rear cleaning body chamber, 48... Air path cover, 49 ...Air passage narrowing body, 50...Rotation, 51...Motor room, 51F...Front motor room, 51R...Rear motor room, 52...Machine room, 52F...Front machine room, 52R...Rear machine room, 53... Control room, 55... Safety equipment room, 57... Relay pipe, 59... Brush bristles, 61... Main drive gear, 62... Driven gear, 63... Belt, 65... Bulkhead, 65F... Front bulkhead, 65R... Rear bulkhead, 66... Dust removal Protrusion, 66F...Front protrusion, 66R...Rear protrusion, 68...Curved surface, 71...Slanted surface, 72...Guide surface, 73...Hole, 75...Protrusion part, 81...Switch, 82...Detection part, 83...Operation piece , 85... Blocking part, 86... Shaft part, 87... Elastic member, 91... Bracket, 92... Support shaft, 93... Roller, 95... Stopper piece, 95a... Base end part, 95b... Free end part, 96... Sphere, 99...Integrated molded member.

Claims (6)

a suction port body having a bottom surface having a suction port, and a suction chamber connected to the suction port;
a rotating cleaning body rotatably supported by the suction port main body;
an electric motor that is housed in the suction port body and generates a driving force for the rotating cleaning body;
a pipe provided in the suction port body and fluidly connected to the suction chamber;
a switch that opens and closes a power supply path connected to the electric motor;
a detection unit that can change the amount of protrusion of the suction port body relative to the surface to be cleaned, and detects whether or not the suction port body is in contact with the ground with the suction port facing the surface to be cleaned;
an operation piece that closes the switch and drives the electric motor when the detection unit detects that the suction port body is grounded with the suction port facing the surface to be cleaned;
a blocking portion that prevents the operating piece from closing the switch when the suction port body is turned upside down ;
comprising a shaft portion that rotationally integrates the detection portion, the operation piece, and the blocking portion;
The shaft portion is disposed between the pipe and the bottom plate of the suction port main body, and extends across the pipe in a direction intersecting the pipe in a plan view of the suction port main body,
The detection unit is provided at one end of the shaft,
The operation piece and the blocking part are provided at the other end of the shaft part. 2. The electric motor according to claim 1, comprising a pair of electric motors, the electric motor being provided at one end in the width direction of the suction port body, and the electric motor being provided at the other end in the width direction of the suction port body. The suction port body described. The suction port body according to claim 1 or 2, wherein the torsional rigidity of the shaft portion is higher than the torsional rigidity of the detection portion and the torsional rigidity of the operation piece. The suction port body according to any one of claims 1 to 3, wherein the shaft portion is made of stainless steel. The suction port body according to any one of claims 1 to 4, wherein the detection section, the operation piece, the blocking section, and the shaft section are rotatably integrated by an integrally molded member. The vacuum cleaner body,
an electric blower that is housed in the vacuum cleaner body and generates negative pressure;
A vacuum cleaner comprising: the suction port body according to any one of claims 1 to 5, which is fluidly connected to the electric blower.

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