JP2021049008A - Blower - Google Patents

Abstract

To provide a technique capable of suppressing a situation where a dust bag moves around due to usage of a blower.SOLUTION: A blower may comprise a prime mover, a fan, a casing, a dust bag, and a harness. The fan may rotate around a rotation axis along with drive of the prime mover. The casing may include an inlet port and an outlet port and cause the air to flow from the inlet port to the outlet port along with the rotation of the fan. The dust bag may be arranged on a downstream side with respect to the outlet port in an air flow direction and collect dust flowing together with the air. The harness may be shouldered by a worker. The harness may be connected to a first fixing part and a second fixing part of the casing and a third fixing part of the dust bag.SELECTED DRAWING: Figure 10

Description

The techniques disclosed herein relate to blowers.

Patent Document 1 discloses a blower. The blower includes a motor, a fan, a casing, and a dust bag. The fan rotates about the rotation axis as the motor is driven. The casing has an intake port and a discharge port, and air flows from the intake port toward the discharge port as the fan rotates. The dust bag is arranged on the downstream side of the discharge port in the direction of air flow, and collects dust flowing with air. The harness is hung on the operator. The harness is connected to the first fixing portion and the second fixing portion of the casing.

Japanese Unexamined Patent Publication No. 2011-125667

In the blower described above, the harness is connected only to the casing. Therefore, when the harness is hung on the operator's shoulder, the harness holds the casing, but does not hold the dust bag. As a result, when the blower is used, the dust bag moves around due to the air flowing into the dust bag, and the workability of the operator deteriorates. The present specification discloses a technique capable of suppressing the dust bag from moving around by using a blower.

This specification discloses a blower. The blower includes a prime mover, a fan, a casing, a dust bag, and a harness. The fan rotates about the rotation axis as the prime mover is driven. The casing has an intake port and a discharge port, and air flows from the intake port toward the discharge port as the fan rotates. The dust bag is arranged on the downstream side of the discharge port in the direction of air flow, and collects dust flowing with air. The harness is hung on the operator. The harness is connected to the first and second fixing portions of the casing and the third fixing portion of the dust bag.

In the above configuration, the harness is hung on the operator when working with the blower 2. Further, the harness is connected to the casing and the dust bag. Therefore, even if air flows into the dust bag during the work by the blower 2, it is possible to prevent the dust bag from moving around.

It is a perspective view of the blower 2 in the blowing mode of 1st Example. It is sectional drawing around the motor 54 of the blower 2 in the blowing mode of 1st Example. It is an overall sectional view of the blower 2 in the blowing mode of 1st Example. It is a right side view of the blower 2 in the blowing mode of 1st Example. It is sectional drawing in the vicinity of the 1st opening 68 of the blower 2 in the blowing mode of 1st Example. It is sectional drawing in the vicinity of the 2nd opening 84 of the blower 2 in the blowing mode of 1st Example. It is a top view of the blower 2 in the blowing mode of 1st Example. It is a left side view of the blower 2 in the blowing mode of 1st Example. It is a perspective view of the blower 2 of an Example in the suction mode of 1st Example. It is a left side view of the blower 2 of the Example in the suction mode of 1st Example. It is a left side view of the blower 2 in the blowing mode of 2nd Example. It is a left side view of the blower 2 in the blowing mode of 3rd Example. It is a left side view of the blower 2 in the blowing mode of 4th Example. It is a left side view of the blower 2 in the blowing mode of 5th Example. It is a left side view of the blower 2 in the blowing mode of 6th Example. It is a left side view of the blower 2 in the blowing mode of 7th Example.

In one or more embodiments, the blower may include a plurality of batteries, a motor, a centrifugal fan, a volute casing, and a main grip. The motor may be driven by receiving electric power from a plurality of batteries. The centrifugal fan may rotate around the rotating shaft by driving a motor, and may send air from the first direction extending along the rotating shaft toward the radial outer side of the rotating shaft. The volute casing has a discharge port, and the air sent out by the centrifugal fan may be guided in a direction along the circumference of the rotation axis and sent to the discharge port. The main grip is arranged radially outside the axis of rotation and outside the volute casing and may be gripped by an operator. The central axis of the main grip may extend along a reference plane perpendicular to the axis of rotation. The distance from the reference plane to the center of gravity of the blower may be 1.5 times or less the width of the main grip. Here, the center of gravity of the blower is that while a plurality of batteries are attached to the volute casing, other accessories such as an air supply pipe for sending air from the volute casing and air to the volute casing are used. The center of gravity of a blower without a suction tube attached to the casing.

In the above configuration, the motor is powered by a plurality of batteries. As a result, it is possible to prevent the blower output or operating time from becoming insufficient. Further, since the distance from the reference plane to the center of gravity of the blower is 1.5 times or less the width of the main grip, the center of gravity of the blower is located near the reference plane. Further, even when accessories such as an air supply pipe and a suction pipe are attached to the volute casing, the center of gravity does not deviate from the reference plane. As a result, when the operator holds the blower by grasping the main grip, it is possible to prevent the blower from tilting. As a result, the posture of the blower can be stabilized.

In one or more embodiments, the center of gravity of the blower may be located closer to the outlet than the main grip when the blower is viewed in the direction of the axis of rotation.

In the above configuration, regardless of whether accessories such as the air supply pipe and suction pipe are attached to the volute casing, when the operator holds the blower by grasping the main grip, the blower has a discharge port on the ground. Tilt in the direction you are facing. Therefore, air can be easily blown toward the ground.

In one or more embodiments, the distance from the reference plane to each of the centers of gravity of the plurality of batteries may be 1.5 times or less the width of the main grip.

With the above configuration, it is possible to suppress the change in the position of the center of gravity of the blower with respect to the change in the number of batteries. As a result, when the operator grips the main grip and holds the blower, the posture of the blower can be stabilized.

In one or more embodiments, when the blower is viewed in the direction of the axis of rotation, each of the centers of gravity of the plurality of batteries may be located closer to the outlet than the main grip.

In the above configuration, the center of gravity of the blower can be arranged closer to the discharge port side than the main grip depending on the weight of the plurality of batteries. As a result, when the operator holds the blower by grasping the main grip, the discharge port of the blower tilts in the direction toward the ground. Therefore, air can be easily blown toward the ground.

In one or more embodiments, one end of the main grip may be located closer to the outlet than the other end of the main grip in the direction in which the central axis extends. When the blower is viewed in the direction of the rotation axis, the center of gravity of the motor may be located on the other end side of the main grip and on the one end side of the other end.

Generally, the motor is one of the heavy parts among the parts constituting the blower. Therefore, the position of the center of gravity of the blower changes greatly depending on the position where the motor is arranged. With the above configuration, when the blower is viewed in the direction of the rotation axis, it is possible to prevent the center of gravity of the blower from being too far from one end of the main grip toward the discharge port. As a result, when the operator grips the main grip and holds the blower, the posture of the blower can be stabilized.

In one or more embodiments, the blower may further include leg members that are secured to the volute case. With the blower mounted on the mounting surface, only the leg members may come into contact with the mounting surface.

In the above configuration, the leg member allows the blower to be stably mounted on the mounting surface.

In one or more embodiments, the leg members may be arranged radially outward of the axis of rotation and may include a subgrip that is gripped by the operator. When the blower is viewed in the direction of the axis of rotation, the center of gravity of the blower may be located between the main grip and the sub grip.

In the above configuration, when the blower is held so that the rotation axis is perpendicular to the mounting surface such as the ground, the operator holds the blower stably by gripping the main grip and the sub grip. Can be done.

In one or more embodiments, the volute casing further comprises an air intake for allowing air to flow from the outside of the blower into the interior of the volute casing. Air flows through the intake port in the first direction. The plurality of batteries may be attached to the volute casing by sliding in the second direction opposite to the first direction, and may be removed from the volute casing by sliding in the first direction.

In the above configuration, when the operator grips the main grip and the side grip and holds the blower so that the intake port of the volute casing faces the ground, the second direction faces the ground and the first direction faces the ground. Turn away from. In the above configuration, since the battery is removed from the volute casing by sliding it in the first direction, it is possible to prevent the plurality of batteries from being detached from the volute casing due to the gravity acting on the battery.

In one or more embodiments, the plurality of batteries may be electrically connected in series.

With the above configuration, the output of the blower can be increased.

In one or more embodiments, the plurality of batteries may be electrically connected in parallel.

With the above configuration, the operating time of the blower can be lengthened.

In one or more embodiments, the blower may include a prime mover, a fan, a casing, a dust bag, and a harness. The fan may rotate about a rotation axis as the prime mover is driven. The casing has an intake port and a discharge port, and air may flow from the intake port toward the discharge port as the fan rotates. The dust bag is arranged on the downstream side of the discharge port in the direction of air flow, and dust flowing with air may be collected. The harness may be hung on the operator. The harness may be connected to the first and second fixing portions of the casing and the third fixing portion of the dust bag.

In the above configuration, the harness is hung on the operator during work. Further, the harness is connected to the casing and the dust bag. Therefore, even if air flows into the dust bag during work, it is possible to prevent the dust bag from moving around.

In one or more embodiments, the harness may include a belt, a first connector, a second connector, and a third connector. The first connector may be arranged at one end in the longitudinal direction of the belt. The second connector may be arranged at the other end of the belt in the longitudinal direction. The third connector may be arranged between the first connector and the second connector in the longitudinal direction. The first connector may be connected to the first fixing portion. The second connector may be connected to the second fixing portion. The third connector may be connected to the third fixing portion.

In the above configuration, the casing is connected to both ends of the harness in the longitudinal direction and the dust bag is connected to a position between the ends of the harness. As a result, even if air flows into the dust bag during work, it is possible to further suppress the dust bag from moving around.

In one or more embodiments, when the blower is viewed in the direction of the axis of rotation, the first fixing portion and the second fixing portion may be arranged diagonally of the casing.

In the above configuration, in the work of collecting dust in the dust bag, the blower is held so that the direction of the rotation axis is the same as the vertical direction. In this case, the harness can stably hold the blower.

In one or more embodiments, when the blower is viewed in the direction of the axis of rotation, the distance from the virtual surface passing through the first fixed portion and the second fixed portion to the center of gravity of the blower is the same as that of the first fixed portion. It may be 0.4 times or less the distance from the second fixed portion.

In the above configuration, in the work of collecting dust in the dust bag, the blower is held so that the direction of the rotation axis is the same as the vertical direction. In this case, it is possible to suppress the rotation of the main casing around the virtual line passing through the first fixed portion and the second fixed portion. As a result, the harness can stably hold the blower.

In one or more embodiments, the third fixing portion may be located downstream of the dust bag in the air flow direction.

In the above configuration, when the third fixing portion is connected to the harness, the downstream side of the dust bag in the air flow direction is fixed to the harness. Therefore, when air flows into the dust bag, it is possible to further suppress the dust bag from moving around.

In one or more embodiments, the blower may further include a flexible tube disposed between the outlet and the dust bag with respect to the direction of air flow.

In the above configuration, the operator can freely bend the flexible pipe. As a result, the operator can freely change the position of the dust bag according to the working posture.

In one or more embodiments, the dust bag may have a relief portion located downstream in the direction of air flow. The relief portion may allow the air in the dust bag to escape to the outside.

In the above configuration, the air that has flowed into the dust bag flows from the upstream side to the downstream side of the dust bag, and flows out from the relief portion to the outside of the dust bag. As a result, it is possible to prevent the dust bag from swelling excessively, and it is possible to efficiently collect the dust flowing in the dust bag together with the air.

In one or more embodiments, the fan may be a centrifugal fan that delivers air from a direction along the axis of rotation to a direction along the axis of rotation.

With the above configuration, air can be sent out in a direction different from the air intake direction.

In one or more embodiments, the blower may be a handheld blower.

With the above configuration, it is possible to improve the handling of the blower by the operator.

In one or more embodiments, the prime mover may be a motor driven by electric power supplied from a power source.

In the above configuration, the vibration is smaller than when the prime mover is an engine. Therefore, it is possible to suppress the vibration transmitted to the operator via the harness during the work.

In one or more embodiments, the power source may be a casing-mountable battery.

With the above configuration, the blower can be used even in a work area where there is no external power supply.

(First Example)
The blower 2 of the first embodiment will be described with reference to FIGS. 1 to 10. The blower 2 is a hand-held blower. The blower 2 has a blowing mode and a suction mode. When the blower 2 is in the ventilation mode, the blower 2 can blow off fallen leaves and the like on the ground. When the blower 2 is in the suction mode, the blower 2 can suck and collect fallen leaves and the like on the ground. Hereinafter, the direction in which the rotation axis AX of the motor 54, which will be described later, extends is referred to as a left-right direction, a direction orthogonal to the left-right direction is referred to as a front-rear direction, and a direction orthogonal to the left-right direction and the front-rear direction is referred to as a vertical direction.

1 to 8 show the configuration of the blower 2 when used in the ventilation mode. As shown in FIG. 1, the blower 2 includes a casing 4 and a plurality of (two in this embodiment) batteries B. In FIG. 1, one battery B is not shown in order to make it easier to see the battery mounting portion 28 described later. The casing 4 includes a main casing 6, a side casing 8, a front connecting portion 10, a rear connecting portion 12, a main grip 14, and a leg member 16. The main casing 6 is formed as a volute casing. A side casing 8 is fixed to the left side surface of the main casing 6 by screws.

The front connecting portion 10 extends upward from the front upper portion of the main casing 6. The rear connecting portion 12 extends upward from the rear upper portion of the main casing 6. The main grip 14 extends between the rear upper portion of the front connecting portion 10 and the front upper portion of the rear connecting portion 12. That is, the front end portion of the main grip 14 is connected to the rear upper portion of the front connecting portion 10, and the rear end portion of the main grip 14 is connected to the front upper portion of the rear connecting portion 12. The main grip 14 is arranged above the main casing 6. The main grip 14 is gripped by an operator. The leg member 16 is fixed to the lower part of the main casing 6. The configuration of the leg member 16 will be described in detail later.

The casing 4 is formed with a front fixing portion (first fixing portion) 22, a lower fixing portion (second fixing portion) 24, and a rear fixing portion 26. The front fixing portion 22 is arranged at the front lower portion of the front connecting portion 10. The lower fixing portion 24 is arranged at the rear lower portion of the main casing 6. The rear fixing portion 26 is arranged above the rear connecting portion 12. When the blower 2 is viewed from the left (or right), the front fixing portion 22 and the lower fixing portion 24 are arranged at diagonal positions of the casing 4.

A plurality of (two in this embodiment) battery mounting portions 28 are arranged on the front surface of the main casing 6. The two battery mounting portions 28 are electrically connected in series. In the modified example, the two battery mounting portions 28 may be electrically connected in parallel. Each of the two batteries B is detachably attached to each of the two battery mounting portions 28. The battery B is, for example, a lithium ion battery.

The battery mounting portion 28 includes a pair of rail portions 30 and a wall portion 31. The pair of rail portions 30 are separated in the vertical direction. The pair of rail portions 30 extend in the left-right direction. The wall portion 31 extends from the right end portion of one rail portion 30 to the right end portion of the other rail portion 30. The battery B is attached to the battery mounting portion 28 by sliding the battery B to the right until it abuts on the wall portion 31. Further, by sliding the battery B to the left, the battery B is removed from the battery mounting portion 28.

A trigger 32 is attached to the main grip 14. The trigger 32 is pushed in by the fingers of the operator's hand holding the main grip 14.

The blower 2 further includes a main power switch 36 and a display panel 38. The main power switch 36 and the display panel 38 are arranged on the inner surface 40 formed by the side casing 8 and the main casing 6. The middle surface 40 faces upward. The inner surface 40 is arranged on the lower left side of the main grip 14. The main power switch 36 is operated by a hand opposite to the hand holding the main grip 14 by the operator. As a result, it is possible to prevent the main power switch 36 from being erroneously operated by the hand holding the main grip 14. The main power switch 36 is a switch for switching between the off state and the on state of the blower 2. When the blower 2 is in the off state, the driving of the motor 54, which will be described later, is prohibited. As a result, the motor 54 is not driven even if the trigger 32 is pushed in. On the other hand, when the blower 2 is in the ON state, the driving of the motor 54 is allowed. As a result, when the trigger 32 is pushed in, the motor 54 is driven. The display panel 38 displays a display indicating that the blower 2 is in the on state, for example, when the blower 2 is in the on state, the display panel 38 displays a display indicating that the blower 2 is in the on state. The display panel 38 is, for example, an LED panel. In the modified example, the display panel 38 may be configured to light up when the blower 2 is in the ON state.

As shown in FIG. 2, the casing 4 has a first accommodating chamber 42, a second accommodating chamber 44, an intake port 46, an air flow path 48, and a discharge port 50 (see FIG. 3). The first storage chamber 42 is defined inside the main casing 6. The second storage chamber 44 is defined by a main casing 6 and a side casing 8. The second containment chamber 44 is arranged on the left side of the first containment chamber 42. The intake port 46 is arranged on the right side surface of the main casing 6. The intake port 46 penetrates the right side surface of the main casing 6. The intake port 46 communicates with the first storage chamber 42. The air flow path 48 communicates with the first storage chamber 42. As shown in FIG. 3, the air flow path 48 extends spirally around an axis extending in the left-right direction. When the blower 2 is viewed to the right, the air flow path 48 extends counterclockwise from the inside to the outside. The discharge port 50 communicates with the air flow path 48. The discharge port 50 is arranged in the upper part of the front surface of the main casing 6. In the front-rear direction, the discharge port 50 is arranged in front of the front end portion of the main grip 14.

As shown in FIG. 2, the blower 2 further includes a motor 54, a control board 56, a fan 58, and a blade 60. The motor 54 and the control board 56 are arranged in the second storage chamber 44. The motor 54 is a prime mover, for example, a brushless motor. In the modified example, the motor 54 may be an engine or a brushed motor. The motor 54 receives electric power from the two batteries B and rotates around a rotation shaft AX extending in the left-right direction. The shaft 54a of the motor 54 extends in the left-right direction. The vicinity of the right end of the shaft 54a extends to the first accommodation chamber 42. The control board 56 is electrically connected to the motor 54. The control board 56 controls the rotation of the motor 54 in response to the operation of the trigger 32.

The fan 58 and the blade 60 are arranged in the first accommodation chamber 42. The fan 58 is fitted in the vicinity of the right end portion of the shaft 54a of the motor 54. The fan 58 is, for example, a centrifugal fan. In the modified example, the fan 58 may be an axial fan. When the motor 54 rotates, the fan 58 rotates around the rotation shaft AX. As a result, the air passes through the intake port 46 and flows from the outside of the blower 2 to the first storage chamber 42. The air passing through the intake port 46 flows to the left. After that, the air is sent out by the fan 58 toward the outside in the radial direction of the rotation shaft AX. The air is guided by the air flow path 48 and flows to the discharge port 50. The blade 60 is fitted in the vicinity of the right end portion of the shaft 54a. The blade 60 is arranged closer to the intake port 46 than the fan 58. When the motor 54 rotates, the blade 60 rotates around the rotation shaft AX together with the fan 58. As a result, dust (for example, fallen leaves and pebbles) that invades the first storage chamber 42 from the intake port 46 together with air is crushed. As a result, it is possible to prevent the fan 58 from being damaged by dust.

As described above, the casing 4 includes the leg member 16. The leg members 16 are arranged on the side opposite to the main grip 14 with the main casing 6 in the vertical direction. That is, the leg member 16 and the main grip 14 are arranged on the radial side of the rotation axis AX with respect to the main casing 6. In a state where the blower 2 is mounted on a mounting surface such as the ground, only the leg member 16 comes into contact with the mounting surface. The leg member 16 includes a subgrip 18. The subgrip 18 is separated from the mounting surface when the blower 2 is mounted on the mounting surface. As a result, when lifting the blower 2 mounted on the mounting surface, the operator can grip the main grip 14 with one hand and the sub grip 18 with the other hand.

As shown in FIG. 4, the blower 2 further includes a cover 62. Here, FIG. 4 is a view of the blower 2 viewed to the left (that is, the blower 2 is viewed in the direction of the rotation axis AX). A large number of small openings are formed in the cover 62. The cover 62 is arranged on the right side surface of the main casing 6. One end of the cover 62 is rotatable with respect to the main casing 6 about a rotation shaft extending in the vertical direction. The cover 62 covers the intake port 46. When one end of the cover 62 is rotated with respect to the main casing 6 from this state, the intake port 46 is opened. A first fixing pin 64 is attached to the other end of the cover 62. As shown in FIG. 5, the first fixing pin 64 is inserted through the first opening 68 of the main casing 6.

The blower 2 further includes a first sensor 70. The first sensor 70 is arranged in the vicinity of the first opening 68. The first sensor 70 is connected to the control board 56. The first sensor 70 detects whether or not the first fixing pin 64 is inserted through the first opening 68. Specifically, when the first fixing pin 64 is inserted through the first opening 68, the intermediate member 72 is pushed downward, and the switch (not shown) of the first sensor 70 is pushed down. In this case, the first sensor 70 outputs an ON signal to the control board 56, and the control board 56 allows the motor 54 to be driven. On the other hand, when the first fixing pin 64 is not inserted through the first opening 68, the intermediate member 72 is not pushed downward because it is urged upward by the spring 69, and the switch of the first sensor 70 is pressed. I can't push it down. In this case, the first sensor 70 outputs an off signal to the control board 56, and the control board 56 prohibits the driving of the motor 54. As a result, it is possible to prevent the motor 54 from being driven in a state where the cover 62 does not cover the intake port 46.

As shown in FIG. 3, the blower 2 further includes a fixed pipe 76 and a blower pipe 78. The fixed pipe 76 is inserted through the discharge port 50. The fixed pipe 76 is a cylinder extending in the longitudinal direction. Air that has passed through the discharge port 50 flows through the fixed pipe 76. The blower pipe 78 is removably attached to the tip of the fixed pipe 76. The blower pipe 78 is a cylinder extending in the longitudinal direction. The air that has passed through the discharge port 50 passes through the fixed pipe 76 and the blower pipe 78, and blows out from the tip opening of the blower pipe 78. As a result, fallen leaves and the like on the ground are blown away.

A protrusion 80 is formed in the lower rear portion of the fixed pipe 76. A second fixing pin 82 is attached to the protrusion 80. As shown in FIG. 6, the second fixing pin 82 is inserted through the second opening 84 of the main casing 6.

The blower 2 further includes a second sensor 86. The second sensor 86 is arranged in the vicinity of the second opening 84. The second sensor 86 is connected to the control board 56. The second sensor 86 detects whether or not the second fixing pin 82 is inserted through the second opening 84. Specifically, when the second fixing pin 82 is inserted through the second opening 84, the intermediate member 88 is pushed in the rear direction (in the direction perpendicular to the paper surface in FIG. 6), and the switch of the second sensor 86 (not shown). ) Is pushed down. In this case, the second sensor 86 outputs an ON signal to the control board 56, and the control board 56 allows the motor 54 to be driven. On the other hand, when the second fixing pin 82 is not inserted through the second opening 84, the intermediate member 88 is not pushed backward because it is urged in the forward direction by a spring (not shown), and the second sensor 86 Switch cannot be pressed down. In this case, the second sensor 86 outputs an off signal to the control board 56, and the control board 56 prohibits the driving of the motor 54.

As shown in FIG. 7, in the blower 2, the central axis of the main grip 14 extends in the front-rear direction along the reference plane P1 perpendicular to the rotation axis AX of the fan 58. When the blower 2 is viewed from above, the center of gravity Gp of the blower 2 is arranged on the main grip 14. That is, the distance from the reference surface P1 to the center of gravity Gp of the blower 2 is 0.5 times or less the width Wg of the main grip 14. The center of gravity Gp of the blower 2 is the center of gravity of the blower 2 in a state where two batteries B are attached to the main casing 6 and the fixed pipe 76 and the blower pipe 78 are not attached to the main casing 6. To say. Further, although not shown, the center of gravity of the blower 2 is arranged on the main grip 14 even when the fixed pipe 76 and the blower pipe 78 are attached to the main casing 6. In the modified example, the center of gravity Gp of the blower 2 may be arranged in the central region A. Here, the central region A has a plane P2 extending to the left side from the reference surface P1 at a distance 1.5 times the width Wg of the main grip 14, and 1.5 times the width Wg of the main grip 14 to the right side from the reference surface P1. It is a region between the plane P3 extending at the distance of. The width Wa between the planes P2 and P3 is three times the width Wg of the main grip 14.

When the blower 2 is viewed from above, the centers of gravity Gb1 and Gb2 of the two batteries B are arranged on the main grip 14. That is, the distance from the reference surface P1 to the center of gravity Gb1 of one battery B and the distance from the reference surface P1 to the center of gravity Gb2 of the other battery B are 0.5 times or less the width of the main grip 14. In the modified example, the centers of gravity Gb1 and Gb2 of the two batteries B may be arranged in the central region A.

As shown in FIG. 4, the center of gravity Gp of the blower 2 and the centers of gravity Gb1 and Gb2 of the two batteries B are arranged in front of the front end of the main grip 14 (on the discharge port 50 side (not shown)) in the front-rear direction. ing. Although not shown, the center of gravity of the blower 2 is in front of the front end of the main grip 14 even when the fixed pipe 76 and the blower pipe 78 are attached to the main casing 6 (discharging port not shown). It is arranged on the 50 side). The center of gravity Gp of the blower 2 is arranged behind the discharge port 50 (not shown) and the centers of gravity Gb1 and Gb2 of the two batteries B (on the main grip 14 side) in the front-rear direction. In the vertical direction, the center of gravity Gp of the blower 2 is arranged between the main grip 14 and the sub grip 18 of the leg member 16. In FIG. 4, the position of the sub-grip 18 is illustrated by a broken line. In the front-rear direction, the center of gravity Gm of the motor 54 is arranged closer to the front end of the main grip 14 than the rear end of the main grip 14, and is closer to the rear end of the main grip 14 than the front end of the main grip 14. Have been placed. The center of gravity Gm of the motor 54 is arranged below the main grip 14. The center of gravity Gp of the blower 2, the centers of gravity Gb1 and Gb2 of the two batteries B, and the center of gravity Gm of the motor 54 are below the surface passing through the center between the top of the main grip 14 and the bottom of the leg member 16. Is located in.

When the blower 2 is viewed to the left, the front fixing portion 22 and the lower fixing portion 24 are arranged on the virtual surface P4. Here, the virtual surface P4 is a surface that passes through the front fixing portion 22 and the lower fixing portion 24. The distance from the virtual surface P4 to the center of gravity Gp of the blower 2 is 0.3 times or less the distance between the front fixing portion 22 and the lower fixing portion 24. In the modified example, the distance from the virtual surface P4 to the center of gravity Gp of the blower 2 may be 0.4 times or less the distance between the front fixing portion 22 and the lower fixing portion 24.

As shown in FIG. 8, when the blower 2 is viewed from the left, the center of gravity Gp of the blower 2 is arranged between the virtual surface P5 and the virtual surface P6 in the vertical direction. Here, the virtual surface P5 is a surface that is vertical in the vertical direction and passes through the front fixing portion 22, and the virtual surface P6 is a surface that is vertical in the vertical direction and passes through the lower fixing portion 24. Is. Further, when the blower 2 is viewed to the left, the center of gravity Gp of the blower 2 is arranged between the virtual surface P7 and the virtual surface P8 in the front-rear direction. Here, the virtual surface P7 is a surface that is perpendicular to the front-rear direction and passes through the front fixing portion 22, and the virtual surface P8 is a surface that is perpendicular to the front-rear direction and passes through the lower fixing portion 24. Is. When viewed in the left-right direction, the center of gravity Gp of the blower 2 is arranged in a region defined by virtual surfaces P5, P6, P7, and P7.

When the blower 2 is viewed to the left, the virtual surface P4 intersects both the virtual surface P9 and the virtual surface P10 between the front fixing portion 22 and the lower fixing portion 24. Here, the virtual surface P9 is a surface that passes through the rear end portion of the trigger 32 attached to the main grip 14 and the front end portion of the sub grip 18, and the virtual surface P10 is the rear end portion and the sub grip of the main grip 14. It is a surface passing through the rear end portion of 18.

Next, the configuration of the blower 2 when used in the suction mode will be described with reference to FIGS. 9 and 10. Some of the components of the blower 2 when used in the suction mode are different from some of the components of the blower 2 when used in the ventilation mode. As shown in FIG. 9, the blower 2 includes a suction pipe 92, a joint 94, a flexible pipe 96, and a dust bag 98 instead of the fixed pipe 76 and the blower pipe 78. The suction pipe 92 is attached to the main casing 6 on the periphery of the intake port 46 (not shown in FIG. 9) with the cover 62 open. The suction tube 92 is a cylinder extending in the longitudinal direction. Although not shown, the third fixing pin 102 attached to the protrusion 100 of the suction pipe 92 is inserted through the first opening 68 of the main casing 6. Further, although not shown, the center of gravity of the blower 2 in the state where the suction pipe 92 is attached to the main casing 6 is arranged on the main grip 14 when the blower 2 is viewed from above, and the blower 2 is arranged in front of the front end of the main grip 14 (on the discharge port 50 side) when viewed in the direction of the rotation axis AX.

The joint 94 is inserted through the discharge port 50. The joint 94 is a cylinder. Although not shown, the fourth fixing pin 106 attached to the protrusion 104 of the joint 94 is inserted through the second opening 84 of the main casing 6.

One end of the flexible pipe 96 is attached to the tip of the joint 94. The flexible tube 96 is a cylinder. The flexible pipe 96 is rotatable along the circumferential direction of the outer peripheral surface of the joint 94. The flexible tube 96 can be bent.

The dust bag 98 is attached to the other end of the flexible pipe 96. That is, in the air flow direction, the dust bag 98 is arranged on the discharge port 50, the joint 94, and the flexible pipe 96 on the downstream side. The dust bag 98 is made of cloth. The cloth is single on one side of the dust bag 98 and double on the other side of the dust bag 98. A fastener 108 is provided at the bottom of the dust bag 98. When the fastener 108 is opened, the dust bag 98 is opened, and when the fastener 108 is closed, the dust bag 98 is closed. A relief portion 110 is formed at the end of the dust bag 98 opposite to the flexible pipe 96. The relief portion 110 is located on the downstream side of the dust bag 98 in the air flow direction. The relief unit 110 releases the air in the dust bag 98 to the outside. A harness fixing portion 114 (third fixing portion) is attached to the other end of the dust bag 98 via a band 112. In the modified example, the harness fixing portion 114 may be attached to the other end portion of the dust bag 98 without passing through the band 112. The harness fixing portion 114 is, for example, a carabiner.

The blower 2 further includes a harness 118. The harness 118 includes a belt 120, a first connector 122, a second connector 124, a third connector 126, a length adjuster 128, and a pad 130. The belt 120 extends in the longitudinal direction. A first connector 122 is provided at one end of the belt 120 in the longitudinal direction. A second connector 124 is provided at the other end of the belt 120 in the longitudinal direction. The first connector 122 and the second connector 124 are, for example, a carabiner. Each of the first connector 122 and the second connector 124 can be connected to any of the front fixing portion 22, the lower fixing portion 24, and the rear fixing portion 26 of the casing 4. The third connector 126 is arranged between one end and the other end of the belt 120. The third connector 126 is, for example, a ring. The third connector 126 can be connected to the harness fixing portion 114. The length adjuster 128 and the pad 130 are arranged at arbitrary positions between one end and the other end of the belt 120 in the longitudinal direction. The length adjuster 128 is a member for adjusting the length of the belt 120. The pad 130 is arranged between the belt 120 and the worker's shoulder when the belt 120 is hung on the worker's shoulder.

When the suction operation is performed using the blower 2, as shown in FIG. 10, the first connector 122 of the harness 118 is connected to the front fixing portion 22 of the casing 4. Further, the second connector 124 of the harness 118 is connected to the lower fixing portion 24 of the casing 4. Further, the harness fixing portion 114 is connected to the third connector 126 of the harness 118.

When the suction operation is performed using the blower 2, the main grip 14 and the sub-grip 18 of the leg member 16 are gripped by the operator, and the belt 120 of the harness 118 is hung on the shoulder of the operator. The other side of the dust bag 98, which has a double cloth, faces the worker. Further, the fastener 108 of the dust bag 98 faces downward (that is, the ground side). When the trigger 32 is pushed up by the operator while the blower 2 is turned on by the operation of the main power switch 36, the motor 54 is driven and the fan 58 is rotated. From this state, when the tip of the suction pipe 92 is directed toward the ground, fallen leaves such as the ground can be seen from the suction pipe 92, the intake port 46, the first storage chamber 42, the air flow path 48, the discharge port 50, the joint 94, and the flexible pipe. It passes through 96 in order and is collected inside the dust bag 98. The fallen leaves are crushed by the blade 60. The air that has flowed into the dust bag 98 together with the fallen leaves flows out from the relief portion 110 of the dust bag 98.

In this embodiment, the blower 2 includes two batteries B, a motor 54, a fan 58, a main casing 6, and a main grip 14. The motor 54 may be driven by receiving electric power from a plurality of batteries B. The fan 58 may rotate around the rotation shaft AX by being driven by the motor 54, and may send air from the left direction extending along the rotation shaft AX toward the outside in the radial direction of the rotation shaft AX. As shown in FIG. 3, the main casing 6 has a discharge port 50, and guides the air sent out by the fan 58 in a direction along the circumference of the rotation shaft AX to send the air to the discharge port 50. The main grip 14 is arranged on the outer side of the rotation shaft AX in the radial direction and on the outer side of the main casing 6, and may be gripped by an operator. The central axis of the main grip 14 may extend along a reference plane P1 perpendicular to the rotation axis AX. As shown in FIG. 7, the distance from the reference surface P1 to the center of gravity Gp of the blower 2 is 1.5 times or less the width Wg of the main grip 14. In this configuration, power is supplied to the motor 54 by a plurality of batteries B. As a result, it is possible to prevent the blower 2 from running out of output or operating time. Further, since the distance from the reference surface P1 to the center of gravity Gp of the blower 2 is 1.5 times or less the width Wg of the main grip 14, the center of gravity Gp of the blower 2 is arranged near the reference surface P1. Further, even when the fixed pipe 76 and the blower pipe 78 are attached to the main casing 6, the center of gravity of the blower 2 does not separate from the reference surface P1. As a result, when the operator grips the main grip 14 and holds the blower 2, it is possible to prevent the blower 2 from tilting. As a result, the posture of the blower 2 can be stabilized.

Further, as shown in FIG. 4, when the blower 2 is viewed in the direction of the rotation axis AX, the center of gravity Gp of the blower 2 is arranged on the discharge port 50 side of the main grip 14. In this configuration, regardless of whether the fixed pipe 76 or the blower pipe 78 is attached to the main casing 6, when the operator holds the main grip 14 and holds the blower 2, the blower 2 has a discharge port 50. Tilt toward the ground. Therefore, air can be easily blown toward the ground.

Further, as shown in FIG. 7, the distance from the reference surface P1 to each of the centers of gravity Gb1 and Gb2 of the two batteries B is 1.5 times or less the width Wg of the main grip 14. In this configuration, it is possible to suppress the change in the position of the center of gravity Gp of the blower 2 with respect to the change in the number of batteries B. As a result, when the operator grips the main grip 14 and holds the blower 2, the posture of the blower 2 can be stabilized.

Further, as shown in FIG. 4, when the blower 2 is viewed in the direction of the rotation axis AX, the centers of gravity Gb1 and Gb2 of the two batteries B are arranged closer to the discharge port 50 than the main grip 14. .. In this configuration, the center of gravity Gp of the blower 2 can be arranged closer to the discharge port 50 than the main grip 14 due to the weight of the two batteries B. As a result, when the operator grips the main grip 14 and holds the blower 2, the blower 2 tilts in the direction in which the discharge port 50 faces the ground. Therefore, air can be easily blown toward the ground.

Further, as shown in FIG. 4, the front end portion of the main grip 14 is arranged closer to the discharge port 50 than the rear end portion of the main grip 14 in the direction in which the central axis of the main grip 14 extends. When the blower 2 is viewed in the direction of the rotation axis AX, the center of gravity Gm of the motor 54 is located on the rear end side of the main grip 14 and on the front end side of the rear end of the main grip 14. Has been done. Generally, the motor 54 is one of the heavy parts among the parts constituting the blower 2. Therefore, the position of the center of gravity Gp of the blower 2 changes greatly depending on the position where the motor 54 is arranged. In this configuration, when the blower 2 is viewed in the direction of the rotation axis AX, it is possible to prevent the center of gravity Gp of the blower 2 from being too far from one end of the main grip 14 toward the discharge port 50. As a result, when the operator grips the main grip 14 and holds the blower 2, the posture of the blower 2 can be stabilized.

Further, as shown in FIG. 1, the blower 2 further includes a leg member 16 fixed to the main casing 6. In a state where the blower 2 is mounted on a mounting surface such as the ground, only the leg member 16 comes into contact with the mounting surface. In this configuration, the leg member 16 allows the blower 2 to be stably mounted on the mounting surface.

Further, as shown in FIG. 2, the leg member 16 is arranged on the radial outer side of the rotation axis AX, and includes a subgrip 18 gripped by an operator. When the blower 2 is viewed in the direction of the rotation axis AX, the center of gravity Gp of the blower 2 is arranged between the main grip 14 and the sub grip 18. In this configuration, when the blower 2 is gripped so that the rotation axis AX is perpendicular to the mounting surface such as the ground, the operator stably grips the blower 2 by gripping the main grip 14 and the sub grip 18. Can be retained.

Further, the main casing 6 further has an intake port 46 for allowing air to flow from the outside of the blower 2 to the inside of the main casing 6. Air flows through the intake port 46 toward the left. The two batteries B are attached to the main casing 6 by sliding them to the right, and are removed from the main casing 6 by sliding them to the left. In this configuration, when the operator holds the main grip 14 and the sub-grip 18 and holds the blower 2 so that the intake port 46 of the main casing 6 faces the ground, the battery B is slid upward. It is removed from the main casing 6. Therefore, it is possible to prevent the two batteries B from coming off the main casing 6 due to the weight acting on the batteries B.

Further, the two batteries B may be electrically connected in series. With this configuration, the output of the blower 2 can be increased.

Further, the two batteries B may be electrically connected in parallel. In this configuration, the operating time of the blower 2 can be lengthened.

In this embodiment, the blower 2 includes a motor 54, a fan 58, a main casing 6, a dust bag 98, and a harness 118. The fan 58 rotates about the rotation shaft AX as the motor 54 is driven. The main casing 6 has an intake port 46 and a discharge port 50, and air may flow from the intake port 46 toward the discharge port 50 as the fan 58 rotates. The dust bag 98 is arranged on the downstream side of the discharge port 50 with respect to the air flow direction, and dust flowing with the air may be collected. The harness 118 may be hung on the shoulder by the operator. As shown in FIG. 10, the harness 118 is connected to the front fixing portion 22 and the lower fixing portion 24 of the main casing 6 and the harness fixing portion 114 of the dust bag 98. In this configuration, the harness 118 is hung on the operator during work. Further, the harness 118 is connected to the main casing 6 and the dust bag 98. Therefore, even if air flows into the dust bag 98 during work, it is possible to prevent the dust bag 98 from moving around.

Further, as shown in FIG. 10, the harness 118 includes a belt 120, a first connector 122, a second connector 124, and a third connector 126. The first connector 122 is arranged at one end of the belt 120 in the longitudinal direction. The second connector 124 is arranged at the other end of the belt 120 in the longitudinal direction. The third connector 126 is arranged between the first connector 122 and the second connector 124 in the longitudinal direction. The first connector 122 is connected to the front fixing portion 22. The second connector 124 is connected to the lower fixing portion 24. The third connector 126 is connected to the harness fixing portion 114. In this configuration, the main casing 6 is connected to both ends of the harness 118 in the longitudinal direction, and the dust bag 98 is connected to a position between both ends of the harness 118. As a result, even if air flows into the dust bag 98 during work, it is possible to further suppress the dust bag 98 from moving around.

Further, as shown in FIG. 4, when the blower 2 is viewed in the direction of the rotation axis AX, the front fixing portion 22 and the lower fixing portion 24 are arranged diagonally of the main casing 6. In this configuration, when the work of collecting dust in the dust bag 98 is performed, the blower 2 is held so that the direction of the rotation axis AX is the same as the vertical direction. In this case, the harness 118 can stably hold the blower 2.

Further, as shown in FIG. 8, when the blower 2 is viewed in the direction of the rotation axis AX, the distance from the virtual surface P4 passing through the front fixing portion 22 and the lower fixing portion 24 to the center of gravity Gp of the blower 2 is forward. It is 0.4 times or less the distance between the fixed portion 22 and the lower fixed portion 24. In this configuration, when the work of collecting dust in the dust bag 98 is performed, the blower 2 is held so that the direction of the rotation axis AX is the same as the vertical direction. In this case, it is possible to suppress the rotation of the main casing 6 around the virtual line passing through the front fixing portion 22 and the lower fixing portion 24. As a result, the harness 118 can stably hold the blower 2.

Further, the harness fixing portion 114 is arranged on the downstream side of the dust bag 98 in the air flow direction. In this configuration, when the harness fixing portion 114 is connected to the harness 118, the downstream side of the dust bag 98 in the air flow direction is fixed to the harness 118. Therefore, when air flows into the dust bag 98, it is possible to further suppress the dust bag 98 from moving around.

Further, the blower 2 may further include a flexible pipe 96 arranged between the discharge port 50 and the dust bag 98 in the air flow direction. In this configuration, the operator can freely bend the flexible pipe 96. As a result, the operator can freely change the position of the dust bag 98 according to the working posture.

Further, the dust bag 98 has a relief portion 110 located on the downstream side in the air flow direction. The relief unit 110 releases the air in the dust bag 98 to the outside. In this configuration, the air that has flowed into the dust bag 98 flows from the upstream side to the downstream side of the dust bag 98, and flows out from the relief portion 110 to the outside of the dust bag 98. As a result, it is possible to prevent the dust bag 98 from swelling excessively, and it is possible to efficiently collect the dust flowing in the dust bag 98 together with the air.

Further, the fan 58 is a centrifugal fan that sends air from the direction along the rotation axis AX to the direction along the circumference of the rotation axis AX. In this configuration, air can be sent out in a direction different from the air intake direction.

The blower 2 is a hand-held blower. With this configuration, it is possible to improve the handling of the blower 2 by the operator.

The motor 54, which is a prime mover, is a motor driven by electric power supplied from a power source. In this configuration, the vibration is smaller than when the prime mover is an engine. Therefore, it is possible to suppress the vibration transmitted to the operator via the harness 118 during the work.

Further, the power source may be a battery B that can be attached to the main casing 6. In this configuration, the blower 2 can be used even in a work area where there is no external power supply.

Further, as shown in FIG. 8, when the blower 2 is viewed to the left, the virtual surface P4 intersects both the virtual surface P9 and the virtual surface P10 between the front fixing portion 22 and the lower fixing portion 24. In this configuration, when the main grip 14 and the sub grip 18 are gripped to hold the blower 2 when used in the suction mode, the posture of the blower 2 can be stabilized.

(Correspondence)
The main casing 6 is an example of a “volut casing”. The right direction is an example of the "first direction", and the left direction is an example of the "second direction". The front fixing portion 22 is an example of the "first fixing portion", the lower fixing portion 24 is an example of the "second fixing portion", and the harness fixing portion 114 is an example of the "third fixing portion". ..

(Second Example)
The blower 2 of the second embodiment will be described with reference to FIG. In the second embodiment, the points different from those in the first embodiment will be described, and the same points as in the first embodiment will be omitted. In the second embodiment, the arrangement of the batteries B is different from the arrangement of the batteries B in the first embodiment. One battery B1 is attached to the front surface of the main casing 6. The other battery B2 is attached to the lower rear portion of the main casing 6. The battery B2 is arranged above the lower fixing portion 24. By sliding the battery B2 to the right, the battery B2 is attached to the main casing 6. Further, by sliding the battery B2 to the left, the battery B2 is removed from the main casing 6.

(Third Example)
The blower 2 of the third embodiment will be described with reference to FIG. In the third embodiment, the points different from those in the first embodiment will be described, and the same points as in the first embodiment will be omitted. In the third embodiment, the arrangement of the batteries B is different from the arrangement of the batteries B in the first embodiment. One battery B1 is attached to the front surface of the main casing 6. The other battery B2 is attached to the rear upper part of the main casing 6. By sliding the battery B2 to the right, the battery B2 is attached to the main casing 6. Further, by sliding the battery B2 to the left, the battery B2 is removed from the main casing 6.

(Fourth Example)
The blower 2 of the fourth embodiment will be described with reference to FIG. In the fourth embodiment, the points different from those in the first embodiment will be described, and the same points as in the first embodiment will be omitted. In the fourth embodiment, the arrangement of the batteries B is different from the arrangement of the batteries B in the first embodiment. The two batteries B are attached to the rear upper portion of the casing 4, specifically, the rear surface of the rear connecting portion 12. The two batteries B are arranged in the vertical direction. By sliding the battery B to the right, the battery B is attached to the rear connection portion 12. Further, by sliding the battery B to the left, the battery B is removed from the rear connection portion 12.

(Fifth Example)
The blower 2 of the fifth embodiment will be described with reference to FIG. In the fifth embodiment, the points different from those in the first embodiment will be described, and the same points as in the first embodiment will be omitted. In the fifth embodiment, the arrangement of the battery B is different from the arrangement of the battery B in the first embodiment. The two batteries B are attached to the side casing 8. The two batteries B are arranged in the front-rear direction. By sliding the battery B downward, the battery B is attached to the side casing 8. Further, by sliding the battery B upward, the battery B is removed from the side casing 8.

(6th Example)
The blower 2 of the sixth embodiment will be described with reference to FIG. In the sixth embodiment, the points different from those in the first embodiment will be described, and the same points as in the first embodiment will be omitted. In the sixth embodiment, the arrangement of the batteries B is different from the arrangement of the batteries B in the first embodiment. The two batteries B are attached to the side casing 8. The two batteries B are arranged in the vertical direction. By sliding the battery B forward, the battery B is attached to the side casing 8. Further, by sliding the battery B in the rear direction, the battery B is removed from the side casing 8.

(7th Example)
The blower 2 of the seventh embodiment will be described with reference to FIG. In the seventh embodiment, the points different from those in the first embodiment will be described, and the same points as in the first embodiment will be omitted. In the seventh embodiment, the arrangement of the batteries B is different from the arrangement of the batteries B in the first embodiment. Further, in the seventh embodiment, the blower 2 does not include the leg member 16 of the first embodiment. One battery B is attached to the lower front portion of the main casing 6. The other battery B is attached to the lower rear portion of the main casing 6. In a state where the blower 2 is mounted on a mounting surface such as the ground, only two batteries B come into contact with the mounting surface. As a result, the blower 2 can be mounted on the mounting surface by the two batteries B without providing other members. By sliding the battery B to the right, the battery B2 is attached to the main casing 6. Further, by sliding the battery B2 to the left, the battery B2 is removed from the main casing 6.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples illustrated above.

The plurality of batteries B according to one embodiment are not limited to the blower 2, and may have a configuration that can be used for other power tools such as a chainsaw and a hedge trimmer.

The number of batteries B according to one embodiment may be three or more.

The blower 2 according to the embodiment does not have to include the leg member 16. In this case, the main casing 6 may be in contact with the mounting surface while the blower 2 is mounted on the mounting surface.

In the harness 118 according to one embodiment, the first connector 122 is connected to the front fixing portion 22, the second connecting tool 124 is connected to the harness fixing portion 114, and the third connecting tool 126 is the lower fixing portion. It may be connected to 24.

In one embodiment, when the blower 2 is viewed in the direction of the rotation axis AX, the center of gravity Gp of the blower 2 may be arranged on the virtual surface P4 passing through the front fixing portion 22 and the lower fixing portion 24.

The harness fixing portion 114 according to one embodiment may be arranged on the upstream side of the dust bag 98 in the air flow direction.

The dust bag 98 according to one embodiment does not have to have a relief portion 110. In this case, the cloth of the dust bag 98 may be coarsely meshed so that air can flow out from the entire dust bag 98.

The technical elements described herein or in the drawings exhibit their technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques illustrated in the present specification or drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes itself has technical usefulness.

2: Blower 4: Casing 6: Main casing 8: Side casing 14: Main grip 16: Leg member 18: Subgrip 22: Front fixing part (first fixing part)
24: Lower fixed part (second fixed part)
28: Battery mounting part 32: Trigger 36: Main power switch 38: Display panel 42: First accommodating chamber 44: Second accommodating chamber 46: Intake port 48: Air flow path 50: Discharge port 54: Motor 56: Control board 58 : Fan 62: Cover 76: Fixed pipe 78: Blower pipe 92: Suction pipe 96: Flexible pipe 98: Dust bag 108: Fastener 110: Relief part 112: Band 114: Harness fixing part (third fixing part)
118: Harness 120: Belt 122: First connector 124: Second connector 126: Third connector A: Central area AX: Rotating axis B: Battery P1: Reference surface P4: Virtual surface

Claims (11)

The prime mover and
A fan that rotates around a rotation axis as the prime mover is driven,
A casing that has an intake port and a discharge port, and allows air to flow from the intake port toward the discharge port as the fan rotates.
A dust bag that is arranged downstream of the discharge port in the air flow direction and collects dust that flows with the air, and a dust bag.
Equipped with a harness that can be hung on the operator's shoulder,
The harness is a blower connected to a first fixing portion and a second fixing portion of the casing and a third fixing portion of the dust bag. The harness is
With a belt
A first connector arranged at one end in the longitudinal direction of the belt and
A second connector arranged at the other end of the belt in the longitudinal direction,
A third connector arranged between the first connector and the second connector in the longitudinal direction is provided.
The first connector is connected to the first fixing portion and is connected to the first fixing portion.
The second connector is connected to the second fixing portion and is connected to the second fixing portion.
The blower according to claim 1, wherein the third connector is connected to the third fixing portion. The blower according to claim 1 or 2, wherein when the blower is viewed in the direction of the rotation axis, the first fixing portion and the second fixing portion are arranged diagonally of the casing. When the blower is viewed in the direction of the rotation axis, the distance from the virtual surface passing through the first fixed portion and the second fixed portion to the center of gravity of the blower is the distance between the first fixed portion and the second fixed portion. The blower according to any one of claims 1 to 3, which is 0.4 times or less the distance to the unit. The blower according to any one of claims 1 to 4, wherein the third fixing portion is arranged on the downstream side of the dust bag in the air flow direction. The blower according to any one of claims 1 to 5, further comprising a flexible pipe arranged between the discharge port and the dust bag with respect to the air flow direction. The dust bag has a relief portion located on the downstream side in the air flow direction.
The blower according to any one of claims 1 to 6, wherein the relief portion releases the air in the dust bag to the outside. The blower according to any one of claims 1 to 7, wherein the fan is a centrifugal fan that sends out the air from a direction along the rotation axis to a direction along the circumference of the rotation axis. The blower according to any one of claims 1 to 8, wherein the blower is a hand-held blower. The blower according to any one of claims 1 to 9, wherein the prime mover is a motor driven by electric power supplied from a power source. The blower according to claim 10, wherein the power source is a battery that can be attached to the casing.

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