WO2020189226A1

WO2020189226A1 - Blower

Info

Publication number: WO2020189226A1
Application number: PCT/JP2020/008298
Authority: WO
Inventors: 直人一橋; 寛之田上; 幹博片岡
Original assignee: 工機ホールディングス株式会社
Priority date: 2019-03-15
Filing date: 2020-02-28
Publication date: 2020-09-24
Also published as: CN113395925A; JP7201070B2; DE112020001270T5; CN113395925B; JPWO2020189226A1

Abstract

The present invention makes it possible to provide a blower with reduced noise by increasing the length of an air channel in the housing while making the product compact. Provided is a blower having a cylindrical housing 2 that has a long direction, a motor 10 that is accommodated in the housing, and a fan 15 that is rotated by the motor and that generates an airflow, wherein an intake port 20 is provided near the front end of a handle 4 and the interior of the handle 4 is used as an air intake channel. Air taken in from the intake port 20 flows as indicated by arrows C2, F2, turns at a rear end connection 4c in the handle 4, flows as indicated by arrow F1, which is the opposite direction of arrow F2, and reaches the fan 15. The air that passes through the fan 15 is discharged toward the front from a discharge port 6.

Description

Blower

The present invention relates to a portable blower, for example, a blower or a cleaner, in which air is sucked into the housing from a suction port by rotation of a fan housed in the main body housing and discharged from the discharge port to the outside of the main body housing.

As a blower which is a kind of a conventional portable blower, for example, the one described in Patent Document 1 is known. This portable blower has a configuration in which external air is taken in from a suction port formed on the side of the blower body by a fan driven by a motor, and the sucked air is blown out to an arbitrary region through a nozzle attached to the air outlet. Is. The operator grips the handle of the blower to perform the cleaning work. Generally, in order to blow off dust on the ground, the blower body is held with the nozzle facing diagonally forward and downward, and the body is shaken left and right to blow off the dust while swinging the nozzle left and right. A centrifugal fan or an axial fan was used for the blower, and the intake port (opening) of the housing for taking in the wind passing through the fan was arranged near the motor.

As another aspect of the blower, the air blown in the opposite direction to the blower is filtered by the filter device, and the air mixed with dust sucked through the dust collecting pipe is filtered and discharged to the outside from the exhaust port formed in the main body housing. The cleaner that was used is known. Patent Document 1 is a portable cleaner, in which a motor built in a main body is driven by the electric power of a battery (battery pack), thereby rotating a fan and sucking air mixed with dust. In the cleaner, an opening (exhaust port) of a housing for discharging the wind passing through the fan was arranged near the motor.

International Publication No. 2016/052267

During the operation of the conventional blower, a large amount of air is sucked into the main body housing and discharged to the outside through the nozzle, which is accompanied by a loud operating noise. Similarly, when the cleaner was operating, it was accompanied by a loud operating noise. As a method of suppressing the noise generated from the conventional fan from being transmitted to the outside, it is conceivable to make the exhaust port smaller, but by making the exhaust port smaller, the flow rate of the exhaust is reduced, and the ventilation capacity and dust collection capacity are reduced. There was a risk that In addition, noise is reduced by installing a sound absorbing material near the motor that rotates the fan, but providing a sound absorbing material leads to an increase in the size and weight of the product and also increases the manufacturing cost. Will lead to.

The present invention has been made in view of the above background, and an object of the present invention is to provide a blower capable of reducing noise due to an exhaust flow while securing a flow rate of the exhaust flow and maintaining a dust collecting ability. Another object of the present invention is to realize a blower capable of reducing noise by attenuating the distance of noise by increasing the length of the air passage between the opening communicating with the outside air of the main body housing and the fan. Still another object of the present invention is to provide a blower in which the handle portion of the main body housing is utilized as a folded flow path.

The typical features of the invention disclosed in the present application will be described as follows. According to one feature of the present invention, the housing is a blower having a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft to generate a suction force. A tubular main body that houses the motor, a handle that extends along the axial direction of the main body, is connected to the main body, and is gripped by the operator, and an air flow generated by the rotation of the fan are introduced into the housing. It has an intake port to enter and an exhaust port to discharge the air flow entering from the intake port to the outside of the housing. Further, the housing has a first flow path in which the air flow entering from the intake port flows toward one side in the axial direction, and a second flow path in which the air flow flowing to the exhaust port flows toward the other side in the axial direction. It has a folded flow path connecting the first flow path and the second flow path, and either the first flow path or the second flow path is formed in the handle portion. Here, the housing has either an intake port or an exhaust port on the other side in the axial direction of the first flow path, and either the intake port or the exhaust port on the other side in the axial direction of the second flow path. Has the other. Then, a folded flow path is formed by connecting the main body portion and the handle portion on one side in the axial direction of the first flow path and the second flow path. Further, the handle portion is connected to the main body portion on both one side in the axial direction and the other side in the axial direction, and an obstructing portion that obstructs the flow of air with the main body portion on the other side in the axial direction, for example, the handle portion and the main body portion. A partition plate for partitioning the space was provided inside the housing.

According to another feature of the present invention, the handle portion is provided with an operation unit operated by an operator, and the operation unit includes a tactile switch arranged on an operation surface shaped along the axial direction. Further, the main body of the housing is provided with a mounting portion for mounting the battery pack that supplies electric power to the motor. The battery pack is arranged so that the axial position when connected to the mounting portion overlaps with the mounting portion on one side of the main body and the handle in the axial direction, and the motor is arranged so that the output shaft extends along the axial direction. Will be done.

According to still another feature of the present invention, the blower sucks air from the intake port formed in the handle portion, and causes the main body portion from the first flow path through the folded flow path and the second flow path. It is a blower that discharges air to the outside through the exhaust port of the above, and a nozzle for guiding the exhausted air in a predetermined direction is connected to the leeward side of the exhaust port.

According to still another feature of the present invention, the blower sucks air from the intake port, from the first flow path, through the folded flow path and the second flow path, and through the exhaust port of the handle portion. It is a cleaner that discharges to the outside and is provided with a filter device for filtering the collected air mixed with dust and a dust case for storing the filtered dust on the wind side of the intake port. Further, a windbreak portion for suppressing the air flow discharged from the exhaust port to the outside of the housing to the grip portion side of the handle portion is provided on one side of the exhaust port of the handle portion.

According to still another feature of the present invention, the housing of the blower has a hollow portion for passing the fingers of the hand, a handle portion for grasping a part around the hollow portion with one hand, and the remaining portion. Is used as the main body for accommodating the motor and fan, a first opening is provided near the fan in the main body, a second opening is provided in the handle, and the space around the second opening and the fan is created. By forming a partition wall, when the fan is rotated by the motor, the handle portion is allowed to pass from the first opening to the second opening or from the second opening to the first opening. An air flow path is formed in one direction around the hollow portion. Further, the blower sucks the outside air from the second opening, passes the inside of the handle portion, and then flows the air toward the fan inside the main body portion, and the air passing through the fan is discharged from the first opening. A nozzle for guiding the exhausted air in a predetermined direction is connected to the leeward side of the first opening. Further, the blower sucks the outside air from the first opening of the housing, guides the air passing through the fan into the inside of the handle part so as to pass from the main body part to the inside of the handle part, and forms it on the downstream side of the handle part. A filter device for filtering the collected air mixed with dust and a dust case for storing the filtered dust are provided on the wind side of the first opening, which is discharged to the outside from the second opening.

According to the present invention, the flow path is folded back in the main body housing so that either the first flow path or the second flow path is formed in the handle portion. It can be used as a turn-back flow path, and the total flow path length from the suction port to the discharge port can be increased with a compact configuration, and noise can be reduced by attenuating the distance. Further, the present invention can be applied to both a blower and a cleaner by changing the direction of air flow in the housing of the blower. Further, in realizing the first flow path and the second flow path of the present invention, it can be easily realized by only partially changing the injection molding mold of the conventional housing, so that an increase in manufacturing cost can be suppressed. ..

It is an external view of the blower 1 by 1st Example of this invention. It is a vertical sectional view of the blower 1 of FIG. It is an exploded perspective view of the blower 1 of FIG. FIG. 2 is a partially enlarged view of FIG. 2 and is a diagram for explaining a detailed configuration of the main body housing 2. It is a left side view of the cleaner 101 according to the 2nd Example of this invention. It is a vertical sectional view of the cleaner 101 according to the 2nd Example of this invention. It is sectional drawing of the part AA of FIG. FIG. 6 is a partially enlarged view of FIG. 6 for explaining a detailed configuration of the main body housing 102.

Hereinafter, examples of the present invention will be described with reference to the drawings. In the following figures, the same parts are designated by the same reference numerals, and the repeated description will be omitted. Further, in the present specification, the front-back, left-right, and up-down directions are described as the directions shown in the drawings.

In FIG. 1, the cordless portable blower 1 drives a motor 10 built in the main body housing 2 by the electric power of the battery pack 50, thereby rotating the fan 15 and passing the generated air flow through the nozzle 40. And then inject forward. The operator grips the handle portion 4 of the blower 1 to perform the work. Generally, the blower 1 is held with the nozzle 40 facing diagonally forward and downward, and the handle portion 4 is shaken left and right to blow off dust on the desk or an object to be cleaned while swinging the nozzle 40 left and right.

The blower 1 includes, for example, a motor 10 (described later in FIG. 2) and a fan 15 (described later in FIG. 2) inside a resin main body housing 2. Air is discharged from the nozzle 40 to the front side. The main body housing 2 includes a tubular main body portion 3 having a longitudinal direction and a handle portion 4 formed on the upper portion thereof, and these are integrally manufactured by molding a synthetic resin. The main body housing 2 is molded in a state of being divided into two by a dividing surface at the center of the left and right, and is fixed by a plurality of screws described later. The handle portion 4 is a portion gripped by an operator with one hand, the front portion of the handle portion 4 is connected to the main body portion 3 by a front side connecting portion 4b extending in a substantially vertical direction, and the rear side portion is a rear side connecting portion. It is connected to the main body 3 at 4c.

A switch panel 30 provided with a switch for the motor 10 (described later in FIG. 2) is provided on the upper side of the grip portion 4a. A second opening 20 is formed on both left and right side surfaces of the front connecting portion 4b of the handle portion 4. The second opening 20 acts as a suction port (or suction port) for sucking the outside air here, and has a plurality of slits having an elongated shape in the horizontal direction.

The battery pack 50 is mounted on the lower rear side of the main body housing 2. The battery pack 50 is widely used in power tools, and has a plurality of battery cells (not shown) housed inside

synthetic resin cases

51 and 52. The battery cell is a secondary battery that can be repeatedly charged and discharged, and a known battery such as a lithium ion battery cell can be used. The output of the battery pack 50 is, for example, DC 18V or 36V. A battery pack mounting portion 9 is formed below the main body portion 3 for mounting the battery pack 50. The battery pack mounting portion 9 is formed with two rail portions (not visible in the figure) extending horizontally in the front-rear direction with a predetermined distance in the left-right direction, and the battery pack 50 is a main body housing 2 along the rail portions. It is attached to the main body housing 2 by horizontally moving it from the rear side to the front side. When the battery pack 50 is removed from the main body housing 2, the battery pack 50 is horizontally moved to the rear side of the main body housing 2 while pushing the

latch buttons

54a and 54b provided on the left and right side surfaces.

When the battery pack 50 is mounted on the main body housing 2, the blower 1 can be stably placed on a desk or the like by the bottom surface of the battery pack 50 and the legs 8 formed on the front side of the main body housing 2. The leg portion 8 is manufactured integrally with the main body portion 3 by molding a synthetic resin.

FIG. 2 is a vertical cross-sectional view of the blower 1 according to the embodiment of the present invention. When the motor 10 is rotated by the electric power of the battery pack 50, the fan 15 attached to the rotation shaft (output shaft) of the motor 10 (not shown) rotates to generate an air flow in the direction of the arrow indicated by the dotted line. The main body housing 2 is mainly composed of a main body portion 3 and a handle portion 4, and a penetrating portion 5 for passing a finger when an operator grips the main body housing 2 is formed between them. The portion above the penetrating portion 5 is the grip portion 4a gripped by the operator. The portion of the main body housing 2 other than the handle portion 4 is the main body portion 3, and in the main body housing 2 of this embodiment, the motor 10 and the fan 15 are housed inside the main body portion 3. The main body 3 of the main body housing 2 has a substantially cylindrical shape, and the rear side of the motor 10 and the fan 15 is shaped as if it is narrowed down in the vertical direction, and the battery pack mounting portion 9 is located below the narrowed down portion. It is installed. Further, a leg portion 8 is formed on the front lower side of the main body portion 3. In this embodiment, all the internal space of the main body housing 2 is utilized as an air flow passage (flow path) generated by the fan 15 to the internal space of the handle portion 4 in addition to the main body portion 3.

The motor 10 is arranged so that the axis A1 of its rotation axis is horizontal. Here, a brushless DC motor housed in a metal case is used as the motor 10. However, the type of the motor 10 is arbitrary, and other known motors such as a DC motor with a brush and an AC motor may be used as long as the fan 15 can be rotated. A circular circuit board 12 is provided on the front side of the motor 10. The motor 10 is held by the main body housing 2 via a ring-shaped motor holding member 13. A fan 15 is attached to a rotating shaft protruding rearward of the motor 10. The fan 15 is a centrifugal fan that sucks air from the rear side in the axis A1 direction from near the center of rotation of the motor 10 and discharges the air outward in the radial direction. The type of fan is not limited to the centrifugal fan, and may be an axial fan or any other known type of fan.

Around the fan 15, an opening of air flowing into the fan 15 and a fan guide 14 forming a wall portion for guiding the discharged air in a predetermined direction (forward) are provided. The fan guide 14 is a molded product of synthetic resin, and a part thereof is fixed to a part of the cylindrical case of the motor 10, and a part on the outer peripheral side is formed on the inner wall portion of the main body housing 2. It is fixed to (described later in FIG. 3). That is, the fan guide 14 functions as a fan guide that defines the rotation space of the fan 15 and as a motor holding member for fixing the motor 10 to the main body housing 2. The outer peripheral surface and the rear side of the fan 15 are covered with the fan guide 14. A circular opening 15a is formed on the rear side of the fan guide 14 near the axis A1, and when the fan 15 rotates, air is sucked from the rear side of the main body housing 2 from the opening 15a and the air is discharged to the outside in the radial direction. To do. The air discharged from the fan 15 is guided by the fan guide 14, and the air is discharged toward the front side of the axis A1 from the opening opened on the front side near the outer edge of the fan guide 14.

The air discharged from the fan guide 14 flows from the rear to the front in the space outside the radial direction of the motor 10. In FIG. 2, the dotted arrow is shown so as to pass near the center of the motor 10, but in reality, the air discharged toward the outside in the radial direction of the fan 15 covers almost the entire outer peripheral side of the motor 10. It flows to the front side. The inner wall surface 3a on the front side of the main body 3 of the main body housing 2 has a shape of a leading throttle toward the first cylindrical opening 6, and has an axis along the outer peripheral surface of the motor 10 and the inner wall surface of the main body 3. The air flow flowing forward in the A1 direction is collected and guided to the first opening 6 formed in a cylindrical shape. Near the rear end of the cylindrical portion of the first opening 6, a mesh-like guard 16 for preventing foreign matter from entering through the first opening 6 is attached.

The handle portion 4 is a grip portion 4a gripped by an operator, a front connection portion 4b that connects the front end of the grip portion 4a and the main body portion 3, and a rear connection that connects the rear end of the grip portion 4a and the main body portion 3. It is formed by part 4c. Here, the front connecting portion 4b of the handle portion 4 and the front connecting portion between the main body portion 3 are configured so as to obstruct the flow of air by the partition wall 25. On the other hand, the connecting portion on the rear side between the handle portion 4 and the main body portion 3 is configured so that the internal space communicates with each other, and the air is configured to flow between the handle portion 4 and the main body portion 3. Only two openings are formed in the body housing 2. One is the first opening 6 which serves as a discharge port. The first opening 6 is a cylindrical opening to which the nozzle 40 can be connected. The other opening is a second opening 20 formed on the side surface of the handle portion 4, which is formed by a plurality of slit-shaped through holes. By forming the first opening 6 and the second opening 20 in this way, an air flow that rotates clockwise around the penetrating portion 5 of the main body housing 2 in one direction when viewed from the left side. Can be caused.

The air that has passed through the first opening 6 reaches the internal space of the nozzle 40 and heads for the front opening (discharge port 45). The nozzle 40 has a predetermined axial length in order to increase the flow velocity by narrowing the flow path of the air discharged from the first opening 6 and to facilitate the air flow to a specific object. The nozzle 40 is manufactured by integrally molding synthetic resin, and a cylindrical connecting portion 41 having a substantially constant diameter is formed at the rear end portion, and the diameter gradually extends from the cylindrical connecting portion 41 to the discharge port 45 having a small diameter. The tapered portion 42 is such that

The switch panel 30 is an operation unit operated by an operator, and a plurality of tactile switches or soft touch switches are arranged. Here, the rotation speed of the motor 10 can be set in two stages, strong and weak. Further, the switch panel 30 is provided with a remaining amount warning lamp of the battery pack 50, and when the remaining amount is low, an LED indicating that the motor 10 is in operation is lit to notify the operator of the battery shortage. To. A control circuit board 35 is arranged under the switch panel 30. The control circuit board 35 is a board on which a circuit for controlling the rotation of the motor 10 is mounted, and the circuit includes a general-purpose one-chip microcomputer and controls the direct current supplied from the battery pack 50 by PWM (Pulse Width Modulation). By doing so, the rotation speed of the motor 10 is controlled. In this embodiment, instead of using a slide-type multi-contact switch or a trigger switch that has been widely used as a switch circuit of the motor 10, a tactile switch is used. By using a thin switch such as a tactile switch, the thickness of the switch panel 30 occupied in the internal space of the handle portion 4 is reduced, and in particular, the area of the internal space of the handle portion 4 that blocks the cross section through which air flows is reduced. It becomes possible. Further, since the control circuit board 35 and the switch panel 30 can be manufactured as one assembly, the assembling property is improved and the required wiring length from the switch to the control circuit board 35 can be shortened.

FIG. 3 is an exploded perspective view of the blower 1 of FIG. The main body housing 2 is manufactured by molding a synthetic resin so that it can be divided into two parts on the left and right sides with the vertical plane passing through the rotation axis of the motor 10 as the dividing surface. The right housing 2A and the left housing 2B forming the main body housing 2 are substantially symmetrical with respect to the vertical dividing surface except for the screw bosses 17a to 17b, and define a space of about half of the air flow path. To do. The motor 10 is fixed so as to be sandwiched between the right side housing 2A and the left side housing 2B after the fixing motor holding member 13 and the fan guide 14 are inserted in the axis A1 direction. A rib 28 for engaging with the motor holding member 13 and a rib 29 for engaging with the fan guide 14 are formed on the inner wall of the right housing 2A. Although not visible in FIG. 3,

ribs

28 and 29 are similarly formed on the inner wall portion of the left housing 2B. By fixing the motor 10 to the main body housing 2 in this way, a space through which air flows in the axial direction (motor side space 3b in FIG. 2) is secured between the outer peripheral surface of the motor 10 and the main body housing 2.

The right housing 2A and the left housing 2B are screwed by a large number of screws 19a to 19h. Therefore, screw bosses 17a to 17h with through screw holes are formed in the right housing 2A. Further, screw bosses 18a to 18h with female screw holes (only 18a and 18b can be seen in FIG. 3) are formed in the corresponding portion of the left housing 2B.

A battery pack mounting portion 9 is formed on the lower side of the main body housing 2. Rail portions 26a and 26b (26b cannot be seen in FIG. 3) are formed in the battery pack mounting portion 9 in the same direction as the axis A1 direction. Between the left and right rail portions 26a and 26b, a main body side terminal holder 36 that holds a plurality of main body side connection terminals 37 connected to the battery pack 50 is arranged. Terminal openings 27a and 27b cut out to the right or left from the dividing surface on the lower side of the right side housing 2A and the left side housing 2B in order to sandwich the main body side terminal holder 36 (27b is not visible in the figure). ) Is formed.

The first opening 6 is arranged on the front side of the main body housing 2. The first opening 6 has a cylindrical shape and is formed by matching the half-cylinder portion of the right side main body housing 2A and the half-cylinder portion of the left side main body housing 2B. An L-shaped mounting groove 7 is formed on the inner peripheral surface of each half-cylinder portion in a side view. The mounting groove 7 is an axial groove extending in the axial direction A1 from the opening surface of the first opening 6, and is bent at a right angle in the circumferential direction from the vicinity of the front end of the axial groove, and has an inscribed angle of about 90 degrees in the circumferential direction. It is composed of extending circumferential grooves. On the other hand, the cylindrical connecting portion 41 of the nozzle 40 is provided with a protrusion 43 located inside the mounting groove 7 at a position 180 degrees apart in the circumferential direction. To mount the nozzle 40, align the protrusion 43 of the nozzle 40 with the mounting groove 7, then push the nozzle 40 in the axial direction and rotate it by about 45 degrees in the circumferential direction.

A second opening 20 is formed on the right side surface and the left side surface of the front side connecting portion 4b of the handle portion 4. The second opening 20 is an elongated slit extending horizontally in the front-rear direction, and each slit is configured to allow air to enter and exit the front connection portion 4b by penetrating the wall surface of the front connection portion 4b. To. These slits are formed at the same time when the synthetic resin of the main body housing 2 is molded and injected.

The bottom surface of the inner space of the front connection portion 4b of the handle portion 4 is a partition wall 25 that also serves as a wall surface of the main body portion 3, and the air flowing from the front connection portion 4b cannot directly flow around the motor 10. The partition wall 25 is not limited to a structure that completely blocks the flow of air, and even if a minimum necessary through hole is formed for manufacturing convenience such as passing wiring or for other purposes. good. The size of the through hole in this case is sufficiently smaller than the cross-sectional area of the internal space of the handle portion 4 so that the provision of the through hole does not change the flow path of most of the air flowing into the fan 15. Is desirable. A cutout portion 4e is formed on the upper surface of the grip portion 4a of the handle portion 4 so as to straddle the divided surface. The notch portion 4e is formed so as to sandwich the switch panel 30 there.

The housing of the battery pack 50 is formed by the upper case 51 and the lower case 52, and the upper case 51 is provided with

rail grooves

53a and 53b for fitting with the rail portion on the battery pack mounting portion 9 side. Be done. Between the

rail grooves

53a and 53b, a battery-side terminal portion 55 having a plurality of slits and a plurality of terminals arranged inside the slits is formed. Further,

latch buttons

54a and 54b are formed on the rear side of the

rail grooves

53a and 53b. When the battery pack 50 is attached to the battery pack mounting portion 9, the main body side connection terminal 37 fits with the battery side terminal portion 55 (see FIG. 3 below for reference numerals), so that the power of the battery pack 50 can be supplied. It becomes. The main body side connection terminal 37, the motor 10 and the switch panel 30 are connected by a cable (not shown).

FIG. 4 is a partial vertical sectional view for explaining the detailed configuration of the main body housing 2. When the operator presses either the strong or weak button of the switch panel 30 while holding the grip portion 4a and holding the blower 1, power is supplied from the battery pack 50 to the motor 10 under the control of a microcomputer (not shown). Then, the motor 10 rotates. When the motor 10 rotates, the fan 15 attached to the rotation shaft of the motor 10 rotates, and the space 3c on the rear side of the fan 15 in the inner space of the main body 3 becomes negative pressure, so that the second opening 20 is opened. Air is sucked from the outside of the main body housing 2 through the main body housing 2. The air sucked from the second opening 20 flows rearward in the internal space 4d of the handle portion 4 in the direction from C2 to F2, and flows in the internal space of the rear connection portion 4c of the handle portion 4 in the direction of arrow C1. It reaches the rear side space 3c and flows into the fan 15 from the opening 13a near the axis A1. The air discharged to the outside in the radial direction of the fan 15 flows forward in the radial direction around the motor 10 and reaches the inside of the nozzle 40 (see FIG. 3) through the first opening 6.

In this embodiment, the second opening 20 is formed in the front side portion of the handle portion 4 from the grip portion 4a, that is, the front side connection portion 4b. The second opening 20 formed on the left and right side surfaces of the front connecting portion 4b is suitable for molding together with the left and right split type main body housing 2, and the influence of the sucked air flow affects the operator. This is to keep it out of reach and to reduce the risk of blocking a part of the second opening 20 by the operator's hand. The lower surface of the front connecting portion 4b becomes a cylindrical wall surface of the main body portion 3, and the cylindrical wall surface inside the connecting surface with the front connecting portion 4b functions as a partition wall 25. The portion of the handle portion 4 that is connected to the rear side of the main body portion 3 is a folded flow path so that the air flow F2 to F1 continuously flows like the air flow C1 by the hollow rear connection portion 4c. The internal space of the rear connecting portion 4c) is formed. Since the folded flow path is above the battery pack mounting portion 9, the internal space of the rear connecting portion 4c can secure a sufficient size. Further, since the lateral width of the main body 3 near the battery pack mounting portion 9 is sufficiently larger than the grip portion 4a of the handle portion 4, the lateral width is sufficient even if the height of the rear space 3c is low. Therefore, it is possible to flow air satisfactorily without becoming a resistance of the air flow F1. Further, in this embodiment, since the control circuit board 35 for mounting the microcomputer is arranged in parallel with the switch panel 30, it is not necessary to mount the control circuit board in the rear side space 3c, so that the rear side space 3c is provided. It is suitable for use as an air passage.

As described above, in the blower 1 of the present embodiment, the air sucked from the second opening 20 flows in the first direction (here, backward) in the inner space of the handle portion 4, and is turned back (rear side). It flows in the main body 3 in the second direction (here, forward) via the connecting portion 4c). In this embodiment, a folded flow path structure is realized by using the space inside the handle portion 4 inside the main body housing 2, and a first flow path and a second flow path in the opposite direction are realized around the penetration portion 5. Therefore, it was possible to secure a long flow path from the suction port to the fan 15 while using the main body housing 2 having the same size as the conventional blower. In particular, since the folded portion (rear side connection portion 4c) of the flow path and the first opening 6 which is the exhaust port are used to the maximum from the front end to the rear end of the main body housing 2, the space inside the handle portion 4 is used as the flow path. In addition to using it, the internal space of the main body 3 could be used to the maximum.

Next, the blower of the second embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG. 5 is a left side view of a portable cleaner 101, which is another example of a blower. The cleaner 101 is also called a so-called vacuum cleaner, and a strong air flow is generated by a fan housed inside, and air mixed with dust is sucked from a nozzle at the tip. The sucked air is filtered by a filter device, and only the filtered air is discharged to the outside through the second opening 120 and the third opening 124. The appearance of the cleaner 101 is defined by the main body housing 102 and the dust case 140. The main body housing 102 houses a motor and a fan, which will be described later, inside the main body housing 102, and forms a handle portion 104 that is gripped by an operator with one hand. The battery pack 50 is mounted on the lower side of the main body housing 102. The battery pack 50 is the same as that used in the first embodiment. The dust case 140 on the front side of the main body housing 102 is detachably configured with respect to the main body housing 102, and the nozzle 144 is formed on the front side. Although not shown here, it is possible to connect an extension pipe, a floor nozzle or the like attached to the tip of the pipe, or the like to the nozzle 144.

The main body housing 102 is a molded product of synthetic resin, and is configured in a left-right two-divided type having a split surface in the vertical direction. The left and right divided parts of the main body housing 102 have a plurality of screw holes (not visible in the figure) and screw bosses 117a to 117d (see FIG. 5 described later), and are fixed by fixing elements such as screws (not shown). The dust case 140 is manufactured by integrally molding a synthetic resin, and has a tubular shape having no dividing surface in the vertical direction. The dust case 140 can be attached by aligning it with the main body housing 102, pressing it backward in the axis B1 direction, and then turning it about 120 degrees around the axis. When removing the dust case 140, the operation opposite to the installation operation may be performed. The structure for fixing the dust case 140 to the main body housing 102 is arbitrary, and other known fixing methods may be used.

On the rear side of the main body housing 102, a penetrating portion 105 is formed which penetrates from the left side to the right side in order to insert four fingers from the index finger to the little finger of the operator, and when the main body housing 102 is viewed from the side view. It has a substantially D-shaped shape rotated by 90 degrees. One side (upper side) of the D-shaped hollow portion (penetrating portion 105) is the handle portion 104 gripped by the operator, and the remaining portion of the main body housing 102 excluding the handle portion 104 is the main body portion 103. The handle portion 104 has a grip portion 104a extending along the axis B1 direction, a bent portion 104b extending so as to intersect the axis B1 and connecting the grip portion 104a and the rear end of the main body portion 103, and the bent portion 104b. Is arranged so that the position seen in the axis B1 direction overlaps with the third opening 124. A switch panel 130 is provided on the upper surface of the handle portion 104 in which a switch for switching the motor on or off is arranged.

On the front upper side surface of the main body housing 102, a second opening 120 for discharging the air mixed with dust sucked through the nozzle 144 and filtered by the filter device (described later) is provided. The second opening 120 is a main exhaust port and is composed of a plurality of slits arranged in the longitudinal direction in parallel with the axis B1. The second opening 120 is formed as a narrow slit in order to prevent foreign matter from being inserted inside, and a total of 12 slits are formed, 6 on the right side surface of the main body housing 102 and 6 on the left side surface. In this way, the second opening 120 limits the size of each opening in order to prevent foreign matter from being inserted while securing a total opening area to some extent. Is it possible to make each opening slit-shaped? The number, arrangement, and shape may be arbitrarily set, including whether to make a mesh shape.

A battery pack mounting portion 109 is provided on the lower surface of the main body portion 103 of the main body housing 102. The shapes of the rail portion and the main body side connection terminal formed on the battery pack mounting portion 109 are also the same as those in the first embodiment. The battery pack 50 can be attached by sliding the main body housing 102 forward in the axis B1 direction, and can be removed by pressing the

latch buttons

54a and 54b and then sliding it backward in the axis B1 direction. A battery guard 108 is provided on the front side of the battery pack 50 so as to cover the front surface of the battery pack 50.

FIG. 6 is a vertical sectional view of the cleaner 101 according to the second embodiment. The motor 110 is housed in the main body housing 102, and is arranged so that the output shaft (not shown) of the motor 110 is oriented along the axis B1. Here, the axis of the motor 110 is coaxial with the rotation axis B1 for mounting the dust case 140, but the output axis (not shown) of the motor 110 and the axis B1 may be arranged so as to be offset from each other. A fan 115 is provided on the front side (opposite side of the battery pack mounting portion 109) of the output shaft (not shown) of the motor 110. The main body housing 102 can be divided into two parts on the left and right, and is a continuous space from the first opening 106 to the second opening 120 depending on the internal space of the right side portion and the internal space of the left side portion of the main body housing 102. Is formed, and the motor 110 and the fan 115 are housed therein. The vicinity of the rear end of the main body 103 is connected to the bent portion 104b of the handle 104, and the inside of the handle 104 is communicated from the rear end of the main body 103.

The motor 110 is a DC motor in which a rotor is housed in a metal motor case, and is a so-called "casing motor". Although the internal structure of the motor 110 is not shown here, the entire motor 110 is covered with a magnetic material having a substantially cylindrical shape, for example, an iron material having a thickness of 2 to 3 mm, and the case covers a part of the stator. Also serves as.

The outer peripheral portion near the front end of the motor 110 is held by the motor holder 114 having a cylindrical inner cylinder portion 114a. The motor holder 114 is connected to the main body housing 102 at four locations on the upper side and the lower side, and has an inner cylinder portion 114a for accommodating the motor 110 and a disk-shaped wall surface 114b in front of the inner cylinder portion 114a. The space between the cylinders 114c is connected by several ribs extending radially, and the space between the outside of the outer cylinder 114c and the outer peripheral wall of the fan guide 113 serves as a flow path to the space 111b on the rear side of the motor 110. The fan 115 is a centrifugal fan, and a fan guide 113 is arranged in front of the fan 115. The space defined by the fan guide 113 and the motor holder 114 is the fan chamber 111a. An opening 113a facing the first opening 106 is formed in the vicinity of the axis B1 of the fan guide 113.

The fan 115 is fixed to the output shaft (not shown) of the motor 110 and rotates about the axis B1 in synchronization with the rotation of the motor 110. The fan 115 is a centrifugal fan, which sucks wind from the front side along the axis B1 and discharges it to the outside in the radial direction of the fan 115. As shown by the arrow C1, the air sucked into the dust case 140 from the nozzle 144 passes from the outside to the inside of the filter device 145 to capture foreign matter such as dust and dirt. The air that has reached the inside of the filter device 145 flows into the internal space of the main body housing 102 through the first opening 106 that is the intake port by being sucked into the fan 115, and reaches the fan chamber 111a that is the accommodation space of the fan 115. To do. In the fan chamber 111a, air is discharged radially outward from the vicinity of the axis B1 by the fan 115, passes through the outer peripheral side of the outer cylinder portion 114c of the motor holder 114, and flows to the rear side, and is a space in which the motor 110 is housed. It reaches 111b. In FIG. 6, the air flow (dotted line arrow) indicating the flow of the cooling air is shown as if it passes through the center of the motor 110, but actually flows to the rear side along the outer peripheral surface of the motor 110. Please note that this is not an accurate illustration of the air passage from the fan 115 to the space 111b.

The air flow flowing to the rear side of the motor 110 is bent in that direction at the bent portion 104b as shown by the dotted arrow, flows inside the handle portion 104 from the rear side to the front side, and flows from the second opening 120. It is discharged to the outside. Here, the first opening 106 serves as an intake port of the main body housing 102, and the second opening 120 serves as a main exhaust port. In this embodiment, a third opening 124 is formed near the connection portion between the main body portion 103 and the rear end of the handle portion 104. The third opening 124 is an exhaust port provided as an auxiliary in order to prevent the exhaust resistance from becoming large only by the second opening 120. If the second opening 120 is sufficient in terms of air volume, it is not necessary to provide the third opening 124.

The front side (downstream side) of the inner space of the handle portion 104 is closed by the partition plate 125 that obstructs the flow of air. The partition plate 125 is a wall portion extending in the left-right direction in the internal space of the main body housing 102, and by separating the front side space of the handle portion 104 and the space near the upper portion of the motor 110 in the main body portion 103, the motor Prevents air from flowing directly from the 110 side to the second opening 120 side. The shape of the partition plate 125 is arbitrary, but it has a flat plate shape that is diagonally arranged when viewed from the vertical surface as shown in FIG. 6 so as not to obstruct the exhaust flow from the fan 115, and the front end portion is It is connected to the inner wall of the main body housing 102, and the rear end is connected to the inner wall of the penetrating portion 105. The partition plate 125 prevents air from flowing from the space on the front side of the handle portion 104 to the space near the upper part of the motor 110. The meaning that air does not flow is not a strict meaning that the air does not flow at all by completely sealing it, and if it does not substantially obstruct the flow of wind around the motor 110, it is a partition. The plate 125 may be provided with the minimum necessary through holes or notches for passing wiring or the like, or may have a slight gap.

In the conventional cleaner, the flow of the cooling air is discharged directly to the outside from the main body 103 by providing exhaust ports on both the left and right sides in the space 111b immediately behind the motor 110. However, in this embodiment, there is only an opening (third opening 124) near the rearmost end of the main body 103, and the air after passing around the motor 110 is from the front end to the rear end of the main body 3. Since it was allowed to flow, the air passage in the main body 103 could be lengthened.

The battery pack 50 located below the main body 103 is attached to the main body housing 102 by sliding it horizontally from the rear side to the front side. Since the rail portion is formed on the lower surface of the main body portion 103 that does not interfere with the rear space 111c, it is possible to secure the internal space as a continuous air passage from the rear end portion of the main body portion 103 to the handle portion 104. A main body side connection terminal 137 for fitting with the battery side terminal portion 55 (see FIG. 3) of the battery pack 50 is arranged in the battery pack mounting portion 109. In this embodiment, since the third opening 124 which is the auxiliary exhaust port is arranged on the rear side, the portion where the main body side connection terminal 137 is provided does not interfere with the third opening 124 which is the auxiliary exhaust port, so that the main body side It was possible to reduce the disturbance of the air flow by the connection terminal 137.

In the internal space 104d of the handle portion 104, the internal space 104d is sufficiently secured as a thin switch panel 130 using the tactile switches 131 to 133 as in the first embodiment. Further, a second opening 120 serving as a discharge port is formed in a portion of the handle portion 104 on the front side of the grip portion 104a (see also FIG. 8 for the range). The vicinity of the second opening 120 is formed to have a wide width in the left-right direction as shown in FIG. Therefore, it is possible to secure a large space volume of the inner portion of the second opening 120.

A cylindrical portion 116 forming a mounting mechanism for mounting the dust case 140 is formed on the outer peripheral side of the first opening 106 on the front side of the main body housing 102. The cylindrical portion 116 is formed on the main body housing 102 side, and an L-shaped groove portion is formed in the radial outward view extending in the axial direction and the circumferential direction, and is formed inside the opening of the dust case 140. Engage with a protrusion (not shown).

The dust case 140 is a member obtained by integrally molding a synthetic resin into a tubular shape. The dust case 140 has a cylindrical shape along the axis B1 of the center of rotation for attachment to the main body housing 102, has a suction nozzle 144 on the front side, and has an opening on the rear side connected to the cylindrical portion 116 of the main body housing 102. 141 is formed. The dust case 140 is attached to the main body housing 102 so as to cover the outside of the cylindrical portion 116 of the main body housing 102. A filter device 145 is attached to the first cylindrical opening 106. The filter device 145 includes a pre-filter and a filter medium (not shown), has a cup shape configured to have air permeability, and is configured so that the opening of the cup faces the first opening 106 side. .. The shape of the dust case 140 including the filter device 145 is arbitrary, and is not limited to the shape described in this embodiment. Further, a cyclone type dust collecting method may be used.

When any of the

tactile switches

131 and 132 of the switch panel 130 is pressed, the electric power of the battery pack 50 is supplied to the motor 110, and the motor 110 rotates. If the "OFF" button (tactile switch 133) is pressed while the motor 110 is rotating, the power of the battery pack 50 is not supplied to the motor 110 and the motor 110 is stopped. Adjacent to these three switches 131 to 133, an LED 134 serving as an operation lamp is provided. The LED 134 lights up while the motor 110 is rotating and turns off when the "off" switch is pressed and the motor 110 stops.

When the motor 110 rotates, the fan 115 rotates, so that the air inside the dust case 140 is sucked out to generate a negative pressure, and a suction force is generated in the intake passage 144a. Therefore, the air and foreign matter outside the main body housing 102 are sucked into the dust case 140 from the suction nozzle 144. The air whose dust has been filtered by the filter device 145 flows into the inside of the main body housing 102 through the first opening 106, flows as shown by the dotted arrow, and is discharged to the outside through the second opening 120.

FIG. 7 is a cross-sectional view of a portion AA of FIG. The main body housing 102 is formed so as to be split left and right from a vertically split surface passing through the axis B1. That is, the right side main body housing 102A and the left side main body housing 102B are fixed by a plurality of screws. The handle portion 104 is formed in a thickness above the main body housing 102 so that the operator can easily grasp it with one hand. On the other hand, the space of the main body portions 103 (103A and 103B) of the main body housing 102 has a tubular shape along the axis B1 direction as can be seen from the top view, and is sufficiently larger in the radial direction than the handle portion 104. The main body 103 is formed so that its diameter decreases toward the rear side in the axis B1 direction toward the rear side. Further, the bent portion 104b of the handle portion 104 has a diameter approximately the same as that of the grip portion 104a (see FIG. 6). A second opening 120 composed of a plurality of slits is formed on both the left and right sides on the front side of the grip portion 104a.

The air flow F2 flowing inside the handle portion 104 is discharged to the atmosphere as an exhaust flow EX through the second opening 120. In the cleaner 101, it is important that the exhaust flow EX is discharged so as not to directly hit the worker's body, particularly the fingers. Therefore, a rib 122 is formed in the vicinity of the rear edge of the second opening 120 so as to extend radially outward from the axis B1, particularly in the left-right direction, so that the exhaust flow EX can smoothly flow to the right or left. It flowed and made it difficult to spread to the rear side. That is, the rib 122 functions as a windbreak means and a windproof portion when viewed from the operator's hand, and prevents the operator's hand from being exposed to airflow and feeling uncomfortable. It should be noted that the windbreak means is not realized by the rib 122 extending outward in the radial direction, but the exhaust flow EX works by changing the shape and position of the second opening 120 to give strong directivity. It may be configured so as not to hit a person's hand or arm. In that case, a protrusion such as a rib 122 that protrudes from the main body housing 102 may be omitted.

A partition plate 125 is arranged below the space sandwiched between the second openings 120 when viewed in the left-right direction. The partition plate 125 is a flat plate that is continuous up to the vicinity of the front end portion 126 of the grip portion 104a, including the portion of the screw boss 117c. By forming a flat plate, the partition plate 125 can be easily formed by injection molding of a left-right split type. The partition plate 125 is formed so as to extend from the inner wall surface of the right side main body housing 102A and the left side main body housing 102B toward the dividing surface, and by being in close contact with each other on the dividing surface, the space near the front end of the handle portion 104 and the motor 110 Obstructs the direct flow of air into the space around the housing.

FIG. 8 is a partially enlarged view of FIG. 6 and is a diagram for explaining the detailed configuration of the main body housing 102. In the second embodiment, the filtered air that has entered through the intake port (first opening 106) is allowed to flow toward one side (rear side in the axial direction) to the vicinity of the rear end of the main body 103. One flow path (air flow F1) was constructed. Further, in the vicinity of the rear end of the main body 103, a part of the air is discharged to the outside through the auxiliary exhaust port (third opening 124), but most of the air turns upward as shown by the arrow C1. Then, the direction is further changed in the forward direction, and the inside of the handle portion 104 flows toward the other side (forward side in the axial direction) as shown by the arrow C2. The internal space of the handle portion 104 is the second flow path, and the air flow F2 flows.

Since the second opening 120 serving as the main exhaust port is provided on the front side of the grip portion 104a, air is discharged to the outside through the second opening 120. A partition plate 125 is formed at the lower part of the main exhaust port (second opening 120), and the downstream end of the second flow path is closed except for the second opening 120, so that the second All the air flowing through the flow path is exhausted to the outside through the second opening 120. Further, the second opening 120 is arranged behind the fan guide 113 and the motor holder 114 arranged in the accommodation space of the fan 115. Therefore, the second opening 120 and the partition plate 125 could be efficiently arranged while accommodating the fan guide 113 and the fan 115 having the maximum diameter with respect to the size of the main body housing 102.

In this embodiment, the rotation of the fan 115 generates air flows C2, F1, C1, and F2, and the arrangement of the air passages has the following characteristics. (1) A first flow path (air flow F1) that flows in the main body housing 102 toward one side (rear side) in the axis B1 direction, and a second flow path (air flow F1) that flows toward the other side (front side) in the axis B1 direction. A flow path (air flow F2) is formed. Further, since the first flow path (air flow F1) and the second flow path (air flow F2) are connected at the rear end of the handle portion 104 (air flow C1), the first flow path (air flow F1). A folded flow path is formed by the flow F1) and the second flow path (air flow F2). As a result, the flow path distance from the fan 115 to the main exhaust port (second opening 120) is sufficiently long, so that the noise caused by the rotation of the fan 115 can be significantly reduced. (2) A second flow path (air flow F2) was formed in the internal space 104d of the handle portion 104. In particular, since the soft touch type switches (131 to 133) are used as the on / off switch of the motor 110, the space in the handle portion 104 can be effectively used. In addition, since the control circuit board previously housed in the first air passage (air flow F1) has been moved directly under the switch panel 130, the number of objects that obstruct the air flow in the first air passage is reduced. I was able to. (3) In preparation for the fact that the exhaust efficiency cannot be sufficiently obtained only by the second opening 120 which is the main exhaust port due to the high speed rotation of the fan 115, the main body of the third opening 124 which is the secondary exhaust port. It is formed on the right side surface and the left side surface near the rear end of the housing 102. As a result, even if the amount of air increases the exhaust resistance, a part of the air is discharged to the outside from the third opening 124, so that it is possible to avoid an excessive increase in the rotational load of the motor 110. Excessive rise in power consumption can also be suppressed. (4) Since the air flow C2 flows in the handle portion 104, the cooling effect of the switch panel 130 and the control circuit board 35 is enhanced. Therefore, even if a heat generating element such as a one-chip microcomputer is mounted on the control circuit board 135, it is possible to prevent the handle portion 104 from becoming hot and causing the operator to feel uncomfortable.

Although the present invention has been described above based on the two examples, the present invention is not limited to the above-mentioned examples, and various modifications can be made without departing from the spirit of the present invention. For example, the above-mentioned blower has been described with the example of a portable blower using a battery as a power source, but the same can be applied to a blower and a cleaner operated by a commercial AC power supply supplied by using a power cord.

1 ... Blower, 2 ... Main body housing, 2A ... Right side housing, 2B ... Left side housing, 3 ... Main body part, 3a ... Inner wall surface (of main body part), 3b ... Motor side space, 3c ... Rear side space, 4 ... Handle

part

4, 4a ... (Handle part) grip part, 4b ... (Handle part) front side connection part, 4c ... (handle part) rear side connection part, 4d ... (handle part) internal space, 4e ... (handle part) ) Notch, 5 ... Penetration, 6 ... First opening, 7 ... Mounting groove, 8 ... Leg, 9 ... Battery pack mounting part, 10 ... Motor, 11a ... Fan chamber, 12 ... Circuit board, 13 ... Motor holding member, 13a ... Opening, 14 ... Fan guide, 15 ... Fan, 15a ... Opening, 16 ... Guard, 17a to 17h ... Screw boss, 18a, 18b ... Screw boss, 19a to 19g ... Screw, 20 ... Second Opening, 25 ... Partition wall, 26a, 26b ... Rail, 27a, 27b ... Terminal opening, 28, 29 ... Rib, 30 ... Switch panel, 31, 32, 33 ... Tactile switch, 34 ... LED 35 ... Control circuit board , 36 ... Main body side terminal holder, 37 ... Main body side connection terminal, 40 ... Nozzle, 41 ... Cylindrical connection part, 41a ... Opening, 42 ... Tapered part, 43 ... Protrusion, 45 ... Discharge port, 50 ... Battery pack, 51 , 52 ... Case, 53a, 53b ... Rail groove, 54a, 54b ... Latch button, 55 ... Battery side terminal, 101 ... Cleaner, 102 ... Main body housing, 102A ... Right housing, 102B ... Left side housing, 103 ... Main body, 104 ... Handle part, 104a ... Grip part (of handle part), 104b ... Bending part (of handle part), 104d ... Internal space (of handle part), 105 ... Penetration part 106 ... First opening, 108 ... Battery Guard, 109 ... Battery pack mounting part, 110 ... Motor, 111a ... Fan chamber, 111b ... Space, 111c ... Rear space, 113 ... Fan guide, 113a ... Opening, 114 ... Motor holder, 114a ... Inner cylinder part, 114b ... Wall surface, 114c ... Outer cylinder part, 115 ... Fan, 116 ... Cylindrical part, 117a-117d ... Screw boss, 120 ... Second opening, 122 ... Rib (windproof means), 124 ... Third opening, 125 ... Partition Plate, 126 ... front end, 130 ... switch panel, 131-133 ... tactile switch, 134 ... LED, 135 ... control circuit board, 137 ... main body side connection terminal, 140 ... dust case, 141 ... opening, 144 ... nozzle, 144a ... Intake path, 145 ... Filter device, F1 ... Air flow ( (In the first air passage), F2 ... Air flow (in the second air passage), C1, C2 ... Air flow

Claims

A blower having a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft to generate a suction force.
The housing is
A tubular main body that houses the motor and
A handle portion that extends along the axial direction of the main body portion, is connected to the main body portion, and is gripped by an operator.
An intake port through which air flow generated by the rotation of the fan enters the housing, and
It has an exhaust port in which an air flow entering from the intake port is discharged to the outside of the housing.
The housing is
A first flow path for flowing an air flow entering from the intake port toward one side in the axial direction, a second flow path for flowing an air flow flowing to the exhaust port toward the other side in the axial direction, and the above. It has a folded flow path connecting the first flow path and the second flow path, and one of the first flow path and the second flow path is formed in the handle portion. Blower.
The housing is
One of the intake port and the exhaust port is provided on the other side of the first flow path in the axial direction.
One of the intake port and the exhaust port is provided on the other side of the second flow path in the axial direction.
Claim 1 is characterized in that the folded flow path is formed by connecting the main body portion and the handle portion on one side of the first flow path and the second flow path in the axial direction. The blower described in.
The handle portion is connected to the main body portion on both one side in the axial direction and the other side in the axial direction.
The blower according to claim 2, wherein the handle portion has an obstructing portion that obstructs the flow of air with the main body portion on the other side in the axial direction.
The blower according to claim 3, wherein the obstructing portion is a partition plate that partitions the handle portion and the main body portion.
The handle portion is provided with an operation portion operated by an operator.
The blower according to any one of claims 1 to 4, wherein the operation unit includes a tactile switch arranged on an operation surface having a shape along the axial direction.
The blower according to any one of claims 1 to 5, wherein the main body is provided with a mounting portion for mounting a battery pack that supplies electric power to the motor.
The battery pack is characterized in that the position in the axial direction when connected to the mounting portion is arranged so as to overlap the mounting portion on one side of the main body portion and the handle portion in the axial direction. The blower according to 6.
The blower according to any one of claims 1 to 7, wherein the motor is arranged so that the output shaft extends along the axial direction.
The blower sucks air from the intake port formed in the handle portion, and from the first flow path via the folded flow path and the second flow path, the exhaust port of the main body portion. It is discharged to the outside through
The blower according to claim 8, wherein a nozzle for guiding the exhausted air in a predetermined direction is connected to the leeward side of the exhaust port.
The blower sucks air from the intake port and discharges the air from the first flow path to the outside through the folded flow path and the second flow path, and through the exhaust port of the handle portion. It's a thing
The blower according to claim 8, wherein a filter device for filtering the collected air mixed with dust and a dust case for storing the filtered dust are provided on the windward side of the intake port.
A claim characterized in that a windbreak portion for suppressing the air flow discharged from the exhaust port to the outside of the housing to the grip portion side of the handle portion is provided on one side of the exhaust port of the handle portion. Item 10. The blower according to item 10.
A blower having a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft to generate a suction force.
The housing has a hollow portion for passing the fingers of the hand, a handle portion for gripping a part around the hollow portion with one hand, and the remaining portion is a main body portion for accommodating a motor and a fan. age,
A first opening is provided in the vicinity of the fan of the main body portion.
A second opening is provided in the handle portion.
By forming a partition wall that separates the space around the second opening from the space around the fan, when the fan is rotated by the motor, the first opening to the second opening, or A blower characterized in that an air flow path is formed in one direction around the hollow portion so as to pass through the handle portion from the second opening to the first opening.
The blower sucks outside air from the second opening, passes the inside of the handle portion, and then causes air to flow toward the fan inside the main body portion, and the air passing through the fan is the first. It is to be discharged from one opening,
The blower according to claim 12, wherein a nozzle for guiding the exhausted air in a predetermined direction is connected to the leeward side of the first opening.
The blower sucks outside air from the first opening of the housing and guides the air that has passed through the fan into the inside of the handle portion so as to pass from the main body portion to the inside of the handle portion. It is discharged to the outside through the second opening formed on the downstream side of the handle portion.
The blower according to claim 12, wherein a filter device for filtering the collected air mixed with dust and a dust case for storing the filtered dust are provided on the windward side of the first opening.