JP7201070B2 - Blower - Google Patents

Description

The present invention relates to a portable air blower, such as a blower or a cleaner, which draws air into the housing from a suction port by rotation of a fan housed in the body housing and discharges the air out of the body housing from the discharge port.

A blower, which is a type of conventional portable air blower, is known, for example, from Patent Document 1. This portable blower takes in external air from a suction port formed on the side of the blower body by a fan driven by a motor, and blows out the sucked air to an arbitrary area through a nozzle attached to the blower port. is. The operator grips the handle of the blower to perform the cleaning work. Generally, in order to blow off dust, etc. on the ground, the blower body is held with the nozzle facing diagonally downward, and the body is shaken left and right to blow dust, etc., while swinging the nozzle left and right. A centrifugal fan or an axial fan is used as the blower, and the air intake port (opening) of the housing for taking in the air that has passed through the fan is arranged near the motor.

As another aspect of the blower, the air blowing direction is opposite to that of the blower, and the air mixed with dust sucked through the dust collecting pipe is filtered by the filter device and discharged to the outside from the exhaust port formed in the main body housing. cleaners are known. Japanese Patent Laid-Open No. 2002-100000 discloses a portable cleaner in which a motor built in a main body is driven by electric power of a battery (battery pack) to rotate a fan and suck air mixed with dust. In the cleaner, an opening (exhaust port) of the housing for discharging the air that has passed through the fan is arranged near the motor.

WO2016/052267

When operating a conventional blower, a large amount of air is sucked into the main body housing and discharged to the outside through the nozzle, resulting in a loud operating noise. Similarly, the operation of the cleaner was accompanied by a large operating noise. As a method to suppress the noise generated by conventional fans from being transmitted to the outside, it is conceivable to reduce the size of the exhaust port. was likely to decline. In addition, sound absorbing material is provided near the motor that rotates the fan to reduce noise. It's connected to.

SUMMARY OF THE INVENTION 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 caused by the exhaust flow while securing the flow rate of the exhaust flow and maintaining the dust collecting ability. Another object of the present invention is to realize a fan in which noise is reduced by distance attenuation of noise by increasing the length of the air passage between the fan and the opening communicating with the outside air of the main body housing. 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 turn-back flow path.

The typical features of the invention disclosed in the present application are as follows. According to one aspect of the invention, there is provided a blower comprising a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft for generating suction, the housing comprising: A cylindrical main body that accommodates a motor, a handle that extends along the axial direction of the main body and is connected to the main body and held by an operator, and an air flow generated by the rotation of the fan flows into the housing. It has an incoming air inlet and an air outlet through which the airflow entering from the inlet is discharged out of the housing. Further, the housing includes a first flow passage through which the air flow entering from the intake port flows toward one side in the axial direction, a second flow passage through which the air flow flowing toward the exhaust port flows toward the other axial direction side, and a second flow passage. It has a turn-back flow path connecting the first flow path and the second flow path, and either one of the first flow path and 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 axial side of the first flow path, and either an intake port or an exhaust port on the other axial side of the second flow path. have the other. Then, on one side in the axial direction of the first flow path and the second flow path, a folded flow path is formed by connecting the main body portion and the handle portion. Further, the handle portion is connected to the main body portion on both the one axial side and the other axial side, and is an obstruction portion that obstructs air flow with the main body portion on the other axial side, for example, the handle portion and the main body portion. A partition plate is provided inside the housing to partition the space between them.

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

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

According to still another feature of the present invention, the blower sucks air from the air intake, 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 equipped with a filter device for filtering the collected dust-mixed air and a dust case for storing the filtered dust on the windward side of the intake port. Moreover, a windbreak is provided on one side of the exhaust port of the handle to prevent the air flow discharged from the exhaust port to the outside of the housing from flowing toward the grip portion of the handle.

According to yet another feature of the invention, the blower housing has a hollow portion for passing the fingers of a hand, a portion of the circumference of the hollow portion being a handle portion for grasping with one hand, and the remainder of the hollow portion being a handle portion for grasping with one hand. is the main body for housing the motor and the 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 defined as By forming the partition wall, when the fan is rotated by the motor, the handle portion is passed from the first opening to the second opening or from the second opening to the first opening. to form an air flow path in one direction around the hollow portion. In addition, the blower sucks outside air from the second opening, passes the inside of the handle portion, and then flows the air inside the main body toward the fan, and the air that has passed 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 outside air from the first opening of the housing, guides the air that has passed through the fan from the main body to the inside of the handle so as to pass through the inside of the handle, and forms a downstream side of the handle. The dust is discharged to the outside from the second opening, and a filter device for filtering collected dust-mixed air and a dust case for storing the filtered dust are provided on the windward side of the first opening.

According to the present invention, either one of the first flow path and the second flow path is formed in the handle portion by folding the flow path inside the body housing. It can be used as a turn-back flow path, and by increasing the total length of the flow path from the suction port to the discharge port with a compact configuration, noise can be reduced by distance attenuation. Also, the present invention can be applied to both blowers and cleaners by changing the direction of flow of air in the housing of the blower. Furthermore, since the first flow path and the second flow path of the present invention can be easily realized by partially changing the mold for injection molding of the conventional housing, an increase in manufacturing cost can be suppressed. .

1 is an external view of a blower 1 according to a first embodiment of the invention; FIG. 2 is a longitudinal sectional view of the blower 1 of FIG. 1; FIG. 2 is an exploded perspective view of the blower 1 of FIG. 1; FIG. FIG. 3 is a partial enlarged view of FIG. 2 for explaining the detailed configuration of the main body housing 2. FIG. FIG. 4 is a left side view of cleaner 101 according to a second embodiment of the present invention; FIG. 4 is a vertical cross-sectional view of cleaner 101 according to a second embodiment of the present invention; FIG. 7 is a cross-sectional view taken along line AA of FIG. 6; FIG. 7 is a partial enlarged view of FIG. 6 for explaining the detailed configuration of the body housing 102. FIG.

Embodiments of the present invention will be described below with reference to the drawings. In the following figures, the same parts are denoted by the same reference numerals, and repeated descriptions are omitted. Further, in this specification, the front, back, left, right, and up and down directions are described as the directions shown in the drawings.

In FIG. 1, the cordless portable blower 1 drives the motor 10 built in the body housing 2 by the power of the battery pack 50, thereby rotating the fan 15, and the generated airflow is sent through the nozzle 40. and jet forward. An operator holds the handle portion 4 of the blower 1 to perform the work. In general, the blower 1 is held with the nozzle 40 directed obliquely forward and downward, and the handle portion 4 is swung left and right to blow off the dust on the desk and the object to be cleaned while swinging the nozzle 40 left and right.

The blower 1 includes a motor 10 (described later in FIG. 2) and a fan 15 (described later in FIG. 2) inside a body housing 2 made of resin, for example. Air is discharged forward from the nozzle 40 . The body housing 2 includes a cylindrical body portion 3 having a longitudinal direction and a handle portion 4 formed thereon, which are integrally manufactured by molding synthetic resin. The body housing 2 is molded in a state of being divided into two parts by a dividing surface at the center of the left and right sides, and fixed by a plurality of screws which will be described later. The handle portion 4 is a portion that an operator holds with one hand. The front portion of the handle portion 4 is connected to the main body portion 3 by a front connection portion 4b extending in a substantially vertical direction, and the rear portion is a rear connection portion. It is connected to the body portion 3 at 4c.

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

A battery pack 50 is attached to the lower rear portion of the body housing 2 . The battery pack 50 is widely used in power tools, and includes a plurality of battery cells (not shown) housed inside cases 51 and 52 made of synthetic resin. A 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 DC 18V, 36V, for example. A battery pack mounting portion 9 is formed below the body portion 3 for mounting the battery pack 50 thereon. The battery pack mounting portion 9 is formed with two rail portions (not visible in the drawing) extending horizontally in the front-rear direction at a predetermined distance in the left-right direction. It is attached to the body housing 2 by moving horizontally from the rear side to the front side. When removing the battery pack 50 from the body housing 2, the battery pack 50 is horizontally moved to the rear side of the body housing 2 while pressing the latch buttons 54a and 54b provided on both left and right sides.

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

FIG. 2 is a vertical sectional view of the blower 1 according to the embodiment of the invention. When the electric power of the battery pack 50 rotates the motor 10, the fan 15 attached to the rotation shaft (output shaft) (not shown) of the motor 10 rotates, thereby generating an air flow in the direction of the dotted arrow. The main body housing 2 is mainly composed of a main body portion 3 and a handle portion 4, and a through portion 5 is formed between them so that an operator can pass his/her fingers through the handle portion. A portion above the penetrating portion 5 serves as a grasping portion 4a to be grasped by the operator. A portion of the body housing 2 other than the handle portion 4 is a body portion 3, and the motor 10 and the fan 15 are housed inside the body portion 3 in the body housing 2 of this embodiment. The main body portion 3 of the main body housing 2 is substantially cylindrical, and the rear side of the motor 10 and the fan 15 is formed in such a shape as to be narrowed in the vertical direction, and the battery pack mounting portion 9 is located below the narrowed portion. be worn. A leg portion 8 is formed on the lower front side of the main body portion 3 . In this embodiment, the entire internal space of the body housing 2, especially the internal space of the handle portion 4 in addition to the body portion 3, is utilized as a passage (flow path) for the airflow generated by the fan 15. FIG.

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

A fan guide 14 is provided around the fan 15 to form a wall for guiding the opening of the air flowing into the fan 15 and the air discharged from the fan 15 in a predetermined direction (forward). The fan guide 14 is a molded product of synthetic resin, a part of which is fixed to a part of the cylindrical case of the motor 10, and a part of the outer peripheral side is a rib 29 ( (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 body housing 2 . The fan guide 14 covers the outer peripheral surface and the rear side of the fan 15 . A circular opening 15a is formed on the rear side near the axis A1 of the fan guide 14. As the fan 15 rotates, air is sucked from the rear side of the main body housing 2 through the opening 15a and the air is discharged radially outward. 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 portion opened forward near the outer edge of the fan guide 14.例文帳に追加

The air discharged from the fan guide 14 flows from the rear to the front in the radially outer space of the motor 10 . In FIG. 2 , the dotted arrow is shown to pass through the vicinity of the center of the motor 10 , but in reality, the air discharged radially outward of the fan 15 extends over substantially the entire outer peripheral side of the motor 10 . flow forward. The inner wall surface 3a on the front side of the main body portion 3 of the main body housing 2 is tapered toward the cylindrical first opening 6, and the axial line extends along the outer peripheral surface of the motor 10 and the inner wall surface of the main body portion 3. The airflow flowing forward in the A1 direction is collected and guided to the first opening 6 formed in a cylindrical shape. A mesh-like guard 16 is attached near the rear end of the cylindrical portion of the first opening 6 to prevent foreign matter from entering through the first opening 6 .

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

The air that has passed through the first opening 6 reaches the internal space of the nozzle 40 and heads toward the front opening (discharge port 45). The nozzle 40 has a predetermined axial length for increasing the flow velocity by constricting the flow path of the air discharged from the first opening 6 and for facilitating the application of the air flow to a specific target. The nozzle 40 is manufactured by integral molding of synthetic resin, and a cylindrical connection portion 41 having a substantially constant diameter is formed at the rear end portion. becomes the tapered portion 42 such that the

The switch panel 30 is an operation unit operated by an operator, and has a plurality of tactile switches or soft touch switches. Here, the number of revolutions of the motor 10 can be set in two stages, high and low. In addition, the switch panel 30 is provided with a remaining amount warning lamp of the battery pack 50, and when the remaining amount becomes low, an LED indicating that the motor 10 is operating is turned on to inform the operator of the battery shortage. be. A control circuit board 35 is arranged below 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. 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, a tactile switch is used as the switch circuit of the motor 10 instead of using a slide-type multi-contact switch or a trigger switch, which have been widely used in the past. 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 part 4 is reduced, and the area of the internal space of the handle part 4 that blocks the air flow section is reduced. becomes possible. Further, since the control circuit board 35 and the switch panel 30 can be manufactured as one assembly, the assembling efficiency is improved and the required wiring length from the switches to the control circuit board 35 can be shortened.

3 is an exploded perspective view of the blower 1 of FIG. 1. FIG. The body housing 2 is manufactured by molding a synthetic resin so that it can be divided into left and right halves with a vertical plane passing through the rotation axis of the motor 10 as a dividing plane. The right housing 2A and the left housing 2B forming the main body housing 2 are substantially symmetrical with respect to the vertical dividing plane, except for the screw bosses 17a to 17b, and define about half the space of the air flow path. do. The motor 10 is fixed by being sandwiched between the right housing 2A and the left housing 2B after the motor holding member 13 for fixing and the fan guide 14 are inserted in the direction of the axis A1. The inner wall of the right housing 2A is formed with ribs 28 to be engaged with the motor holding member 13 and ribs 29 to be engaged with the fan guide 14. As shown in FIG. 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 body housing 2 in this way, a space (motor side space 3b in FIG. 2) through which air flows in the axial direction is secured between the outer peripheral surface of the motor 10 and the body housing 2. FIG.

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

A battery pack mounting portion 9 is formed on the lower side of the body housing 2 . Rail portions 26a and 26b (26b is not visible in FIG. 3) are formed in the battery pack mounting portion 9 in the same direction as the axis A1 direction. A body-side terminal holder 36 that holds a plurality of body-side connection terminals 37 connected to the battery pack 50 is arranged between the left and right rail portions 26 a and 26 b. Terminal openings 27a and 27b (27b is not visible in the figure) are provided on the undersides of the right housing 2A and the left housing 2B so as to hold the body-side terminal holders 36 therebetween. ) is formed.

A first opening 6 is arranged on the front side of the body housing 2 . The first opening 6 is cylindrical and is formed by joining a half-cylinder portion of the right body housing 2A and a half-cylinder portion of the left body housing 2B. An L-shaped mounting groove 7 is formed in the inner peripheral surface of each half-cylinder portion when viewed from the side. The mounting groove 7 is an axial groove extending in the direction of the axis 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 to form a circumferential angle of about 90 degrees in the circumferential direction. It is constituted by an extending circumferential groove. On the other hand, the cylindrical connecting portion 41 of the nozzle 40 is provided with projections 43 positioned inside the mounting groove 7 at positions spaced apart by 180 degrees in the circumferential direction. To attach the nozzle 40, the projection 43 of the nozzle 40 and the attachment groove 7 are aligned, then the nozzle 40 is axially pushed in and rotated about 45 degrees in the circumferential direction.

A second opening 20 is formed on the right side and the left side of the front connecting portion 4b of the handle portion 4. As shown in FIG. The second opening 20 is an elongated slit that extends horizontally in the front-rear direction, and each slit penetrates the wall surface of the front connection portion 4b so that air can flow in and out of the front connection portion 4b. be. These slits are formed at the same time when the synthetic resin for the 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 serves as a partition wall 25 that also serves as the wall surface of the main body portion 3, so that the air that has flowed in from the front connection portion 4b cannot flow directly around the motor 10. The partition wall 25 is not limited to a structure that completely blocks the flow of air. good. In this case, the size of the through hole is sufficiently smaller than the cross-sectional area of the internal space of the handle portion 4 so that the flow path of most of the air flowing into the fan 15 is not changed by providing the through hole. preferably A notch portion 4e is formed on the upper surface of the grip portion 4a of the handle portion 4 so as to straddle the dividing surface. The notch portion 4e is formed to hold the switch panel 30 there.

The housing of the battery pack 50 is formed by an upper case 51 and a lower case 52. The upper case 51 is provided with rail grooves 53a and 53b for fitting with rail portions on the battery pack mounting portion 9 side. be done. A battery-side terminal portion 55 having a plurality of slits and a plurality of terminals arranged inside the slits is formed between the rail grooves 53a and 53b. Latch buttons 54a and 54b are formed behind the rail grooves 53a and 53b. When the battery pack 50 is attached to the battery pack mounting portion 9, the body-side connection terminal 37 is fitted with the battery-side terminal portion 55 (refer to FIG. 3, which will be described later for reference numerals), so that the power of the battery pack 50 can be supplied. becomes. The body-side connection terminals 37, the motor 10, and the switch panel 30 are connected by cables (not shown).

FIG. 4 is a partial longitudinal sectional view for explaining the detailed structure of the main body housing 2. As shown in FIG. When the operator presses either the strong or weak button on the switch panel 30 while holding the blower 1 by gripping the grip portion 4a, power is supplied from the battery pack 50 to the motor 10 under the control of a microcomputer (not shown). and the motor 10 rotates. When the motor 10 rotates, the fan 15 attached to the rotating shaft of the motor 10 rotates, and the space 3c behind 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 body housing 2 through the air. The air sucked from the second opening 20 flows rearward through the internal space 4d of the handle portion 4 in the direction from C2 to F2, and flows through the internal space of the rear connecting portion 4c of the handle portion 4 in the direction of the arrow C1. , reaches the rear space 3c, and flows into the fan 15 through the opening 13a near the axis A1. The air discharged radially outward from the fan 15 flows radially forward around the motor 10 and reaches the inside of the nozzle 40 (see FIG. 3) from the first opening 6 .

In this embodiment, the second opening 20 is formed in the portion of the handle portion 4 on the front side of the grip portion 4a, that is, in the front connection portion 4b. The reason why the second openings 20 are formed on the left and right side surfaces of the front connecting portion 4b is that it is suitable for molding together with the left and right split type main body housing 2, and the effect of the sucked air flow is reduced by the operator. This is to prevent it from reaching the hand, and to reduce the risk of blocking a part of the second opening 20 with the operator's hand. The lower surface of the front connection portion 4b serves as the cylindrical wall surface of the main body portion 3, and the inner cylindrical wall surface of the connection surface with the front connection portion 4b functions as the partition wall 25. As shown in FIG. The portion of the handle portion 4 that is connected to the rear side of the main body portion 3 has a turn-back flow path ( An internal space of the rear connection portion 4c) is formed. Since the turn-back flow path is above the battery pack mounting portion 9, a sufficient size of the internal space of the rear connecting portion 4c can be ensured. Further, since the lateral width of the main body 3 near the battery pack mounting portion 9 is sufficiently larger than that of the grip portion 4a of the handle portion 4, the lateral width is sufficient even if the height of the rear space 3c is lowered. Therefore, the air can flow well without becoming a resistance to the air flow F1. Furthermore, in this embodiment, since the control circuit board 35 for mounting the microcomputer is arranged parallel to the switch panel 30, it is not necessary to mount the control circuit board in the rear space 3c. 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, rearward) in the inner space of the handle portion 4 and turns back in the flow path (rearward). It flows through the body portion 3 in the second direction (here forward) via the connecting portion 4c). In this embodiment, inside the body housing 2, the space in the handle portion 4 is used to realize a turn-back flow path structure, and around the through portion 5, the first flow path and the second flow path in the opposite direction are formed. , a long flow path from the suction port to the fan 15 can be ensured while using the main body housing 2 having the same size as that of a conventional blower. In particular, since the turn-back portion (rear connecting portion 4c) of the flow path and the first opening 6 serving as an exhaust port are utilized to the maximum from the front end to the rear end of the body housing 2, the space in the handle portion 4 is used as the flow path. In addition to being used, the internal space of the body part 3 was also maximally usable.

Next, a blower according to a second embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG. FIG. 5 is a left side view of a portable cleaner 101, which is another example of an air blower. The cleaner 101, which is also called a vacuum cleaner, generates a strong airflow with a fan housed inside, and sucks air mixed with dust from a nozzle at the tip. The sucked air is filtered of dust by the 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 cleaner 101 is defined by body housing 102 and dust case 140 . The body housing 102 accommodates a motor and a fan, which will be described later, and forms a handle portion 104 that is held by an operator with one hand. A battery pack 50 is attached to the lower side of the body housing 102 . Battery pack 50 is the same as that used in the first embodiment. A dust case 140 on the front side of the body housing 102 is detachable from the body housing 102, and a nozzle 144 is formed on the front side. Although not shown here, the nozzle 144 can be connected to an extension pipe and a floor nozzle or the like attached to the tip of the pipe.

The main body housing 102 is a synthetic resin molded article, and is configured in a left and right split type having a split surface in the vertical direction. The left and right divided parts of the body housing 102 have a plurality of screw holes (not shown) 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 cylindrical shape with no dividing surface in the vertical direction. The dust case 140 can be attached by aligning it with the main body housing 102, pushing it backward in the direction of the axis B1, and then rotating it about the axis by about 120 degrees. When removing the dust case 140, it is sufficient to perform an operation opposite to the operation for attaching it. 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 penetrating from the left side to the right side is formed for inserting the operator's four fingers from the index finger to the little finger. It becomes a substantially D-shaped shape rotated by 90 degrees. One side (upper side) across the D-shaped hollow portion (through portion 105 ) serves as a handle portion 104 that is gripped by an operator, and the remaining portion of the body housing 102 excluding the handle portion 104 serves as a body portion 103 . The handle portion 104 has a grip portion 104a extending along the direction of the axis B1, and 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. The bent portion 104b is arranged so that the position viewed in the direction of the axis B1 overlaps with the third opening 124 . A switch panel 130 is provided on the upper surface of the handle portion 104 and has a switch for switching the motor on or off.

A second opening 120 is provided on the front upper side surface of the main body housing 102 for discharging the air mixed with dust sucked through the nozzle 144 and filtered by a filter device (described later). The second opening 120 is a main exhaust port and is composed of a plurality of slits arranged in parallel with the axis B1 in the longitudinal direction. The second openings 120 are slits of narrow width to prevent foreign objects from being inserted into the inside, and a total of 12 openings are formed, 6 on the right side and 6 on the left side of the body housing 102 . In this way, the second opening 120 has a certain amount of total opening area and limits the size of each opening in order to prevent foreign objects from being inserted. The number, arrangement, and shape may be arbitrarily set, including whether or not to form a mesh.

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 shape of the rail portion formed on the battery pack mounting portion 109 and the body side connection terminal are also the same as those of the first embodiment. The battery pack 50 can be attached by sliding it forward in the axis B1 direction of the body housing 102, and can be removed by pushing the latch buttons 54a and 54b and then sliding it backward in the axis B1 direction. A battery guard 108 that covers the front surface of the battery pack 50 is provided on the front side of the battery pack 50 .

FIG. 6 is a longitudinal sectional view of the cleaner 101 according to the second embodiment. A motor 110 is accommodated in the body housing 102, and the output shaft (not shown) of the motor 110 is arranged along the axis B1. Here, the axis of the motor 110 is coaxial with the rotation axis B1 for attaching the dust case 140, but the output shaft (not shown) of the motor 110 and the axis B1 may be displaced. A fan 115 is provided on the front side of the output shaft (not shown) of the motor 110 (on the side opposite to the battery pack mounting portion 109). The body housing 102 can be divided into left and right halves, and a continuous space from the first opening 106 to the second opening 120 is formed by the inner space of the right side of the body housing 102 and the inner space of the left side. is formed, in which the motor 110 and the fan 115 are housed. The vicinity of the rear end of the main body portion 103 is connected to the bent portion 104b of the handle portion 104, forming a space in which the rear end of the main body portion 103 communicates with the inside of the handle portion 104. As shown in FIG.

The motor 110 is a DC motor in which a rotor is housed in a motor case made of metal, and is called a "casing motor". Although illustration of the internal structure of the motor 110 is omitted here, the entire motor 110 is covered with a substantially cylindrical magnetic material, for example, an iron material with a thickness of 2 to 3 mm, and the case partially covers the stator. concurrently.

An outer peripheral portion near the front end of the motor 110 is held by a motor holder 114 having a cylindrical inner cylinder portion 114a. The motor holder 114 is connected to the body housing 102 at four points on the upper side and the lower side, and has an inner cylindrical portion 114a for accommodating the motor 110 and a disk-shaped wall surface 114b on the front surface thereof. The cylindrical portions 114 c are connected by several radially extending ribs, and the space between the outside of the outer cylindrical portion 114 c and the outer peripheral wall of the fan guide 113 forms a flow path to the space 111 b on the rear side of the motor 110 . Fan 115 is a centrifugal fan, and fan guide 113 is arranged in front thereof. A space defined by the fan guide 113 and the motor holder 114 serves as a fan chamber 111a. An opening 113 a facing the first opening 106 is formed near the axis B<b>1 of the fan guide 113 .

Fan 115 is fixed to an output shaft (not shown) of motor 110 and rotates around axis B1 in synchronization with the rotation of motor 110 . The fan 115 is a centrifugal fan that draws air from the front side along the axis B1 and discharges it radially outward of the fan 115 . Air sucked into the dust case 140 from the nozzle 144 passes from the outside to the inside of the filter device 145 as indicated by an arrow C1, thereby trapping foreign matter such as dirt and dust. The air that has reached the inside of the filter device 145 is sucked into the fan 115 and flows into the internal space of the main body housing 102 through the first opening 106 serving as an intake port, and reaches the fan chamber 111a serving as the housing space for the fan 115. do. In the fan chamber 111a, the air is discharged radially outward from the vicinity of the axis B1 by the fan 115, passes through the outer cylindrical portion 114c of the motor holder 114, flows rearward, and forms a space in which the motor 110 is accommodated. 111b is reached. In FIG. 6, the airflow (dotted line arrow) indicating the flow of the cooling air is illustrated as if it passes through the center of the motor 110, but actually flows along the outer peripheral surface of the motor 110 to the rear side. However, it should be noted that it is not an accurate illustration of the air path from the fan 115 to the space 111b.

The airflow that has flowed to the rear side of the motor 110 is bent in its direction at the bent portion 104b as indicated by the dotted arrow, flows from the rear side to the front side inside the handle portion 104, and flows through the second opening 120. It is discharged outside. Here, the first opening 106 serves as an intake port of the body housing 102, and the second opening 120 serves as a main exhaust port. In this embodiment, a third opening 124 is formed in the vicinity of the connecting portion at the rear ends of the body portion 103 and the handle portion 104 . The third opening 124 is an exhaust port that is provided supplementarily to prevent the second opening 120 alone from increasing the exhaust resistance. In addition, when only the second opening 120 is sufficient in terms of air volume, the third opening 124 may not be provided.

The front side (downstream side) of the inner space of the handle portion 104 is closed by a partition plate 125 that obstructs air circulation. The partition plate 125 is a wall portion extending in the left-right direction in the inner space of the body housing 102, and separates the space in front of the handle portion 104 from the space near the upper portion of the motor 110 in the body portion 103, thereby separating the motor. Air is prevented from flowing directly from the 110 side to the second opening 120 side. The shape of the partition plate 125 is arbitrary, but in order not to obstruct the flow of exhaust air from the fan 115, it should be in the form of a flat plate arranged obliquely when viewed from the vertical plane as shown in FIG. It is connected to the inner wall of the body housing 102 , and its rear end is connected to the inner wall surface of the through portion 105 . The partition plate 125 prevents air from flowing from the front space of the handle portion 104 to the space near the upper portion of the motor 110 . It should be noted that the term "no air flow" does not strictly mean that the air is completely sealed and no air flows at all. The plate 125 may have a necessary minimum through hole or notch for passing wiring or the like, or may have a slight gap.

In the conventional cleaner, the flow of the cooling air is directly discharged from the main body 103 to the outside by providing exhaust ports on the left and right sides of the space 111b in the vicinity of the immediate rear of the motor 110 . However, in this embodiment, the opening (the third opening 124) is provided only near the rear end of the main body 103, and the air after passing around the motor 110 flows from the front end to the rear end of the main body 3. Since the air flow is made to flow, the air passage in the main body 103 can be lengthened.

The battery pack 50 located on the lower side of the body portion 103 is mounted on the body housing 102 by horizontally sliding from the rear side to the front side. Since the rail portion is formed on the lower surface of the body portion 103 so as not to 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 body portion 103 to the handle portion 104. The battery pack mounting portion 109 is provided with body side connection terminals 137 for fitting with the battery side terminal portions 55 (see FIG. 3) of the battery pack 50 . In this embodiment, since the third opening 124 serving as the auxiliary exhaust port is arranged on the rear side, the portion where the body-side connection terminal 137 is provided does not interfere with the third opening 124 serving as the auxiliary exhaust port. The turbulence of the airflow due to the connection terminal 137 can be reduced.

The operation unit operated by the operator is a thin switch panel 130 using tactile switches 131 to 133 as in the first embodiment , so that the internal space 104d of the handle 104 is sufficiently secured. In addition, a second opening 120 serving as a discharge port is formed in a portion on the front side of the grip portion 104a (see also FIG. 8 for the range) of the handle portion 104. As shown in FIG. The vicinity of the second opening 120 is formed to have a large width in the horizontal direction as shown in FIG. Therefore, it is possible to secure a large space volume inside the second opening 120 .

A cylindrical portion 116 that constitutes a mounting mechanism for mounting a dust case 140 is formed on the outer peripheral side of the first opening 106 on the front side of the body housing 102 . The cylindrical portion 116 is formed on the main body housing 102 side, and has a groove extending in the axial direction and the circumferential direction and having an L shape when viewed from the outside in the radial direction, and is formed inside the opening of the dust case 140. It engages with a protrusion (not shown).

The dust case 140 is a member integrally formed of synthetic resin into a cylindrical shape. The dust case 140 has a cylindrical shape along the rotation center axis B1 for attachment to the main body housing 102, has a suction nozzle 144 on the front side, and an opening connected to the cylindrical portion 116 of the main body housing 102 on the rear side. 141 is formed. Dust case 140 is attached to body housing 102 so as to cover the outside of cylindrical portion 116 of body housing 102 . A filter device 145 is attached to the cylindrical first opening 106 . The filter device 145 includes a pre-filter and a filter material (not shown), and has a cup shape configured to provide air permeability, and is configured such 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. Alternatively, a cyclone dust collection system may be used.

When one of the tactile switches 131 and 132 of the switch panel 130 is pushed, the electric power of the battery pack 50 is supplied to the motor 110 and the motor 110 rotates. When the "OFF" button (tactile switch 133) is pushed while the motor 110 is rotating, the power of the battery pack 50 is no longer supplied to the motor 110, and the motor 110 stops. Adjacent to these three switches 131-133, an LED 134 serving as an operation lamp is provided. The LED 134 lights up while the motor 110 is rotating, and goes out when the "OFF" switch is pressed to stop the motor 110. FIG.

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

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

The airflow F2 flowing inside the handle portion 104 passes through the second opening 120 and is discharged into the atmosphere as an exhaust flow EX. In the cleaner 101, it is important that the exhaust flow EX is discharged so as not to hit the operator's body, especially fingers, directly. Therefore, in the vicinity of the rear edge of the second opening 120, a rib 122 extending radially outward, particularly in the lateral direction, from the axis B1 is formed to allow the exhaust flow EX to flow smoothly in the rightward or leftward direction. It was made difficult to flow and diffuse to the rear side. In other words, the rib 122 functions as a windbreak means and a windbreak portion when viewed from the operator's hand, and prevents the operator from feeling uncomfortable due to the airflow. The windbreak means is not realized by the ribs 122 extending radially outward, but by changing the shape and position of the second openings 120 so as to have strong directivity. It may be configured so as not to hit the hand or arm of the person. In that case, protrusions such as the ribs 122 that protrude from the 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 continues to the vicinity of the front end portion 126 of the grip portion 104a including the portion of the screw boss 117c. By using a flat plate, the partition plate 125 can be easily formed by left and right split type injection molding. The partition plate 125 is formed so as to extend from the inner wall surfaces of the right main body housing 102A and the left main body housing 102B toward the dividing plane, and is brought into close contact with the dividing plane to separate the space near the front end of the handle portion 104 and the motor 110. block direct air flow into the surrounding space.

FIG. 8 is a partially enlarged view of FIG. 6 for explaining the detailed configuration of the main body housing 102. As shown in FIG. In the second embodiment, the filtered air entering from 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. Also, in the vicinity of the rear end of the main body 103, part of the air is discharged to the outside through the sub-exhaust port (the third opening 124), but most of the air is turned upward as indicated by the arrow C1. Then, it is turned forward and flows inside the handle portion 104 toward the other side (forward in the axial direction) as indicated by an arrow C2. The internal space of the handle portion 104 is the second flow path through which the air flow F2 flows.

Since the second opening 120 serving as a main exhaust port is provided on the front side of the grip portion 104a, the air passes through the second opening 120 and is discharged to the outside. A partition plate 125 is formed below the main exhaust port (second opening 120) to close the downstream end of the second flow path except for the second opening 120. All the air flowing through the flow path is discharged 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 which are arranged in the housing space of the fan 115 . Therefore, the second opening 120 and the partition plate 125 could be arranged efficiently 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 airflows C2, F1, C1, and F2, and the arrangement of the air paths has the following features. (1) A first flow path (airflow F1) that flows in the body housing 102 toward one side (rear side) in the direction of the axis B1, and a second flow path (air flow F1) that flows toward the other side (front side) in the direction of the axis B1. 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 The flow F1) and the second flow path (air flow F2) form a turn-around flow path. As a result, the flow passage 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 greatly reduced. (2) A second flow path (air flow F2) is 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 on/off switches for the motor 110, the space inside the handle portion 104 can be effectively used. In addition, since the control circuit board, which was conventionally accommodated in the first air passage (air flow F1), is moved directly below the switch panel 130, the objects that obstruct the air flow in the first air passage are reduced. I was able to (3) As the fan 115 rotates at a higher speed, the second opening 120, which is the main exhaust port, does not provide sufficient exhaust efficiency. They are formed on the right side and left side near the rear end of the housing 102 . As a result, even if the amount of air increases enough to increase the exhaust resistance, a portion of the air is discharged to the outside from the third opening 124, so an excessive increase in the rotation load of the motor 110 can be avoided. An excessive increase in power consumption can also be suppressed. (4) Since the airflow C2 flows through 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 operator from feeling uncomfortable due to the handle portion 104 becoming hot.

Although the present invention has been described above based on two embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the blower described above is a battery-powered portable blower, but it can also be applied to blowers and cleaners that operate on commercial AC power supplied using a power cord.

DESCRIPTION OF SYMBOLS 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 , 4a... Grip portion (of handle portion) 4b... Front side connection portion (of handle portion) 4c... Rear side connection portion (of handle portion) 4d... Internal space (of handle portion) 4e... (of handle portion) ) Notch portion 5 Penetrating portion 6 First opening 7 Mounting groove 8 Leg 9 Battery pack mounting portion 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 portion 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 part 42...Taper part 43...Protrusion 45...Discharge port 50...Battery pack 51 , 52...Case 53a, 53b...Rail groove 54a, 54b...Latch button 55...Battery side terminal part 101...Cleaner 102...Main body housing 102A...Right side housing 102B...Left side housing 103...Main body part 104... Handle part 104a... Grasping part (of handle part) 104b... Bending part (of handle part) 104d... Internal space (of handle part) 105... Penetrating part 106... First opening 108... Battery Guard 109 Battery pack mounting portion 110 Motor 111a Fan chamber 111b Space 111c Rear space 113 Fan guide 113a Opening 114 Motor holder 114a Inner cylindrical portion 114b Wall surface 114c Outer cylindrical portion 115 Fan 116 Cylindrical portion 117a to 117d Screw boss 120 Second opening 122 Rib (windproof means) 124 Third opening 125 Partition Plate 126 Front end 130 Switch panel 131 to 133 Tactile switch 134 LED 135 Control circuit board 137 Body side connection terminal 140 Dust case 141 Opening 144 Nozzle 144a... intake path, 145... filter device, F1... air flow ( inside the first air passage), F2: air flow (in the second air passage), C1, C2: air flow

Claims (13)

A blower comprising a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft for generating a suction force,
The housing is
a cylindrical main body that houses the motor;
a handle portion that extends along the axial direction of the body portion and has a grip portion that is gripped by an operator and that is connected to the body portion;
an air intake through which an airflow generated by rotation of the fan enters the housing;
an exhaust port through which the airflow entering from the intake port is discharged to the outside of the housing;
The handle portion is connected to the body portion on both the one axial side and the other axial side,
The housing is
a first flow path for flowing the air flow entering from the intake port toward one axial direction side; a second flow passage for flowing the air flow toward the exhaust port toward the other axial direction side; a turn-around flow path connecting the first flow path and the second flow path, one of the first flow path and the second flow path being formed in the handle portion;
The 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,
The handle portion has an obstruction portion that obstructs air flow with the main body portion on the other side in the axial direction,
A blower, wherein either one of the intake port and the exhaust port is arranged between the holding portion and the inhibition portion of the handle portion. The housing is
having either one of the intake port and the exhaust port on the other side of the first flow path in the axial direction;
2. The fan according to claim 1, wherein the other of the intake port and the exhaust port is provided on the other side of the second flow path in the axial direction. 3. The blower according to claim 2, wherein the blocking portion is a partition plate that separates 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 3, wherein the operation unit includes a tactile switch arranged on an operation surface shaped along the axial direction. The blower according to any one of claims 1 to 4, wherein the body portion is provided with a mounting portion for mounting a battery pack that supplies electric power to the motor. The battery pack is arranged so that the axial position of the battery pack in a state of being connected to the mounting portion overlaps with the mounting portion on one axial side of the main body portion and the handle portion. 5. The blower according to 5. 7. The blower according to claim 1, wherein the motor is arranged such that the output shaft extends along the axial direction. A blower comprising a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft for generating a suction force,
The housing is
a cylindrical main body that houses the motor;
a handle portion that extends along the axial direction of the main body portion and has a grip portion that is gripped by an operator, is connected to the main body portion, and is gripped by an operator;
an intake port provided in the handle portion through which an air flow generated by rotation of the fan enters the housing;
an exhaust port provided in the main body for discharging the airflow entering from the intake port to the outside of the housing;
The handle portion is connected to the body portion on both the one axial side and the other axial side,
The housing is
a first flow path through which the air flow entering from the intake port flows toward the one axial direction side; and a second flow passage through which the air flow flowing toward the exhaust port flows toward the other axial direction direction; Having a turn-back flow path connecting the first flow path and the second flow path,
the first flow path is formed in the handle portion;
A blower, wherein a nozzle is connected to a leeward side of the exhaust port for guiding the exhausted air in a predetermined direction. The blower sucks air from the intake port and discharges the air from the first flow path to the outside through the outlet of the handle portion through the folded flow path and the second flow path. being a thing,
8. The blower according to claim 7, wherein a filter device for filtering collected dust-mixed air and a dust case for storing the filtered dust are provided on the windward side of the intake port. A windbreak portion is provided on one side of the exhaust port of the handle portion to prevent an air flow discharged from the exhaust port to the outside of the housing from flowing toward the grip portion side of the handle portion. Item 9. The blower according to item 9. A blower comprising a housing, a motor held in the housing and having an output shaft, and a fan fixed to the output shaft for generating a suction force,
The housing has a hollow portion for passing fingers through, a portion of the periphery of the hollow portion is a handle portion for holding with one hand, and the remaining portion is a main body portion for accommodating a motor and a fan. year,
A first opening is provided in the vicinity of the fan of the main body,
A second opening is provided in the handle portion,
By forming a partition wall that separates the space around the second opening and the space around the fan, the fan is rotated by the motor from the first opening to the second opening, or A blower, wherein 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 flows the air inside the main body portion toward the fan, and the air that has passed through the fan is the first opening. It is to be discharged from one opening,
12. The blower according to claim 11, 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 from the body to the inside of the handle so as to pass through the inside of the handle, discharged to the outside from the second opening formed on the downstream side of the handle,
12. The blower according to claim 11, wherein a filter device for filtering collected dust-mixed air and a dust case for storing the filtered dust are provided on the windward side of the first opening.

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