JP2014148950A - Electric blower - Google Patents

Abstract

A battery pack for low output can be used as a power source for a relatively high output electric machine, thereby improving convenience and handling of the electric machine.
A housing is provided with a tubular nozzle (13) for blowing wind on the front side of a housing (11), and a blower fan (43) for sending wind to the nozzle (13) by rotation and an electric motor (41) for rotationally driving the blower fan. An electric blower 10 provided inside. The electric blower 10 is provided with a handle 21 extending in the front-rear direction for gripping the user when the user uses the blower 10 with his / her hand. The electric blower 10 also includes a plurality of attachment portions 31 and 32 that can attach separate rechargeable battery packs B1 and B2 to the housing, respectively, and a plurality of battery packs attached to the attachment portions 31 and 32. The electric motor 41 is configured to be driven by the electric power of B1 and B2.
[Selection] Figure 2

Description

  The present invention relates to an electric blower that is driven by a rechargeable battery pack and used to blow off dead leaves on the ground.

  The following patent documents disclose a technique related to an electric blower in this technical field. This blower is a blower provided with an elongated tubular nozzle 13 and capable of blowing dead leaves and the like by a wind blown from the tip of the nozzle 13.

  Not only this type of blower but also a battery pack of an electric machine is provided with an output voltage of 18V or 36V, for example. 18V output battery packs are mainly used for hand-held electric devices that are relatively small and have a small output. In the case of relatively large (high output) electric devices that require higher output, the larger 36V is used. An output battery pack is used.

  In recent years, high-powered electric devices have been made cordless, and along with this, large 36V battery packs have become widespread. However, smaller 14.4V battery packs and 18V battery packs are still the mainstream and widely spread. doing. Ordinarily, a user of an electric device prepares a plurality of spare battery packs and charges them in parallel with the work, so that a single electric device can work continuously for a long time while replacing the battery pack. I can do it. Also in this respect, a small 18V battery pack is more widely used than a large 36V battery pack.

  Furthermore, the battery pack for electric motors can be reused between plural types of electric motors having the same power supply specifications. The 18V battery packs are much more popular than the 36V battery packs because there are many types of 18V-specific electric devices that are widely used.

JP 2011-163300 A

  However, since it is not possible to divert the more widely used small 18V battery pack for the high output electric motor that uses the 36V battery pack as a dedicated power source, the user can use the 36V battery pack dedicated to the high output electric motor. However, there is a problem that the cost becomes high in this respect, and there is room for further improving the handling of the high-powered electric motor.

  The present invention has been made in view of such problems, and the problem to be solved by the present invention is to make it possible to use a low-output battery pack as a power source for a relatively high-output electric motor. This is to improve the convenience and handling of the electric machine.

  According to one aspect of the present invention, an electric motor that generates a rotational motion, including a nozzle provided on the front side of the housing so as to be able to reciprocate relatively so as to be able to mow between branches and leaves, and the rotational motion is provided. An electric blower provided with a conversion mechanism for converting into relative reciprocation of the nozzle in the housing is obtained. The electric blower is provided with a handle extending in the front-rear direction on the upper side of the housing to be gripped when the user holds the blower in his / her hand. The electric blower also includes a plurality of attachment portions to which separate chargeable battery packs can be attached to the housing, and the electric motor is driven by the electric power of the plurality of battery packs attached to the attachment portions. Has been. Thereby, two battery packs for low outputs can be attached and a high output electric blower can be used. Therefore, the battery pack for low output can be used effectively, and the convenience and handleability of the high output electric blower can be improved.

  As a preferred embodiment, when the size of the grip width in the left-right direction of the handle is W, the plurality of attachment portions are arranged such that the center of gravity of the entire blower including the attached battery pack is at the center of the handle grip width. It is arranged so as to be within a distance of 1.5 W on both the left and right sides from the surface. As a result, when the handle is held and the present blower is carried, the balance is stabilized, so that the handling of the blower is enhanced. The center of gravity of each attached battery pack is preferably within a distance of 1.5 W on both the left and right sides from the center plane of the handle grip width.

  As another preferred embodiment, the plurality of attachment portions are arranged so that when the blower is placed on a horizontal surface, the lower surface of the blower and the attached battery pack can be grounded to the horizontal surface at at least two places. ing. Thereby, when placing the blower on the ground or the like, it can be placed in contact with at least two places including the heavy battery pack, so that the posture is stabilized and the handling of the blower is enhanced. Further, it is desirable that the position of the center of gravity of the entire blower is located between the lowermost part of the blower and the battery pack in the front-rear direction.

  As another preferred embodiment, the plurality of attachment portions are arranged such that the attached battery pack is located behind the lowermost portion of the blower in the front-rear direction and passes through the lowermost portion in the vertical direction. It is arranged so as to be included above the plane parallel to the center line of the nozzle. Thereby, since the nozzle does not touch the ground when the blower is placed on the ground or the like, the possibility of damaging the nozzle is reduced, and the handleability of the blower is improved.

  In another preferred embodiment, the plurality of attachment portions are arranged so that the battery pack can be attached by moving the battery pack in the adjacent position and in the same direction. As a result, the battery pack can be easily attached and detached, and the handling of the blower is enhanced.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to use effectively the battery pack for low outputs, the convenience and handleability of a high output electric blower can be improved.

It is a perspective view of the whole blower concerning a 1st embodiment. It is a left view of the main-body part of the blower of FIG. It is a top view of the main-body part of the blower of FIG. It is a rear view of the blower of FIG. It is a bottom view of the main-body part of the blower of FIG. It is a perspective view of a battery pack. It is a top view which shows the attachment surface of the case of a battery pack. It is sectional drawing in the VIII-VIII line of the battery pack of FIG. It is a rear view of the blower concerning a 2nd embodiment. It is a bottom view of the main-body part of the blower concerning 3rd Embodiment. It is a left view of the main-body part of the blower which concerns on 4th Embodiment. It is a left view of the main-body part of the blower which concerns on 5th Embodiment. It is a left view of the main-body part of the blower concerning 6th Embodiment. It is a left view of the main-body part of the blower concerning 7th Embodiment. It is a left view of the main-body part of the blower concerning 8th Embodiment. It is a left view of the main-body part of the blower which concerns on 9th Embodiment. It is the schematic which shows the example of the blower which deform | transformed the fan into the vertical volute type. It is a figure which shows the modification which provided the remaining capacity display of the battery in the blower of FIG. It is a figure which shows the modification which provided the remaining capacity display of the battery in the position different from FIG. It is a figure which shows the modification which provided the remaining capacity display of the battery in the blower of FIG.

  Embodiments for carrying out the present invention will be described below with reference to the drawings. In the drawings, the parts denoted by the same reference numerals are parts having substantially the same function, and therefore, the following description will focus on the first embodiment shown in FIGS. 1 to 6 and other embodiments will be described. State only the differences.

[Blower and nozzle]
Various examples of an electric blower that is driven by an attached rechargeable battery pack and mainly blows off dead leaves that have fallen on the ground are shown in FIGS. This type of blower 10 is provided with an elongated tubular nozzle 13 as shown in FIG. 1 on the front side (back side as viewed from the user) of the housing 11 of the main body 10b, and the main body 10b is supported by a hand and freely moved. However, dead leaves and the like can be blown off by the air blown from the tip of the nozzle 13. The nozzle 13 of this embodiment is generally linear, and only the tip is bent upward. The blower 10 normally uses the nozzle 13 obliquely downward, but in this specification, the direction in which the nozzle 13 extends toward the tip will be described as the front.

  Further, as shown in FIG. 2, the blower 10 is rotated by the electric power of the attached battery packs B1 and B2, and sends a wind to the nozzles (volute) 43 (see also FIG. 5). An electric motor 41 that rotationally drives the fan 43 is provided in the housing 11. FIG. 2 shows these positions virtually. Since specific structures of the motor 41 and the fan 43 can be known, a detailed description is omitted here. The blower body housing 11 of this embodiment has a rounded shape as a whole, but generally has the longest front and back and the shortest left and right. The motor 43 and the fan 43 are horizontal fans with the vertical direction as an axis. Therefore, the housing 11 has the projecting portion 11b that projects to the left and right sides so that at least the diameter of the fan 43 can be accommodated, although the housing 11 is shortest (thin) in the left-right direction as described above. An intake port 15 for taking in air from the outside is opened in a lower portion of the fan 43 in the housing 11. The intake port 15 is provided on the side surface of the housing as shown in FIG. 2 and the lower surface of the housing 11 as shown in FIG. 5, and communicates with the fan case that houses the fan 43. On the other hand, the nozzle 13 is attached to the front portion of the housing 11 so as to communicate with the fan case as indicated by a broken line in FIG. The wind sent out by the fan 43 flows into the nozzle 13 from the main body 10b side as shown by an arrow in FIG.

[handle]
The blower 10 is provided with a handle 21 to be gripped when the user holds the blower 10 in his / her hand, as shown in FIG. As shown in FIG. 3, the handle 21 includes a grip 21 g that extends in the vertical direction (that is, generally in the front-rear direction) when viewed from above. The handle 21 is also provided with a switch button 21s for switching on / off the operation of the electric motor 41 as shown in FIG. The handle 21 of this embodiment is formed in a loop shape as shown in FIG. 1, and a part thereof is a grip portion 21g. The handle 21 has a loop formed by opening a hole in the left-right direction in the housing 11, and a grip portion 21 g is formed above the hole. Therefore, the handle 21 constitutes a part of the housing 11. The handle 21 does not necessarily have a closed loop shape, and may be a cantilevered handle having an interrupted end.

[Battery pack]
As shown in FIG. 5, the housing 11 of the blower main body 10b is provided with a plurality of attachment portions 31 and 32 to which separate battery packs B1 and B2 can be attached. The battery packs B1 and B2 are typical batteries in which a plurality of rechargeable battery cells C are accommodated in a case Bc to achieve a predetermined output as shown in FIG. FIG. 8 shows a battery pack B1 containing ten battery cells C as an example. The battery cell C is, for example, a lithium ion battery, but may be another type of battery as long as it is a rechargeable secondary battery. The battery packs B1 and B2 can be repeatedly used as a power source for the blower 10 by being removed from the blower 10 and charged by a separately prepared charger.

  The electric power of the battery packs B1 and B2 attached to the attachment portions 31 and 32 is supplied to the electric motor 41 mainly through the power supply circuit. The battery packs B1 and B2 of the present embodiment have an 18V output as an example. When the battery packs B1 and B2 are attached to the attachment portions 31 and 32, the battery packs B1 and B2 are connected in series by a power supply circuit to substantially realize 36V output. That is, the electric motor 41 is a motor having a rated voltage of 36 V that is operated by a 36 V power source by the two battery packs B1 and B2 connected in series. As a result, the low-power 18V battery packs B1 and B2 can be effectively used, and the convenience and handleability of the high-output blower 10 can be further enhanced. In particular, an 18V battery pack that is currently widely used, including a spare battery pack or the like, can be used, so that the high-output blower 10 with a 36V specification can be used without separately purchasing a 36V battery pack. Therefore, a remarkable effect can be obtained in that the cost of the cutting work can be reduced and the workability can be improved.

[Battery pack attachment]
Each attachment part 31 and 32 of this embodiment is formed so that it can attach battery pack B1 and B2 of a slide attachment type as especially shown in FIG. 6 as one form of a battery pack. Since the two battery packs B1 and B2 have the same form, and the two attachment parts 31 and 32 have substantially the same form, one of the attachment parts 31 and this are representatively shown. A description will be given using the battery pack B1 to be attached. As shown in FIG. 5, the mounting portion 31 is provided with two parallel rails 31a and positive and negative connection terminals 31b and 31c. On the other hand, the battery pack B1 is provided with two parallel rails Bb on one surface of the case Bc as shown in FIG. Between the rails Bb, positive and negative connection terminals Bd and Be are provided.

  By sliding and engaging the rail Bb of the battery pack B1 along the rail 31a of the attachment portion 31, the battery pack B1 can be mechanically attached to the blower body 10b and can be removed by the reverse operation. . Further, the positive and negative connection terminals 31b and 31c are respectively connected to the positive and negative connection terminals Bd and Be of the battery pack B1, whereby the battery pack B1 is electrically connected to the power supply circuit of the blower body 10b.

  As shown in FIG. 6, the battery pack B <b> 1 is provided with a lock claw Bg for locking the battery pack B <b> 1 in an attached state with respect to the attachment portion 31 so as to be able to advance and retreat from the surface on which the rail Bb of the case Bc is provided. On the other hand, as shown in FIG. 5, the attachment portion 31 is provided with a concave claw engagement portion 31d for engaging the lock claw Bg of the battery pack B1 and locking the battery pack B1 in the attachment state. Yes. As shown in FIG. 7, the battery pack B1 has a lock release button Ba for retreating the lock claw Bg into the case and releasing the engagement state of the attachment portion 31 with the claw engagement portion 31d. It is provided on the surface adjacent to the surface on which the claw Bg is provided. Further, as shown in FIG. 5, a biasing member 31e such as a leaf spring for biasing the battery pack B1 attached to the attachment portion in the removing direction is provided.

[Mounting location and mounting / removal direction]
In the blower 10 of the first embodiment shown in FIGS. 1 to 6, two attachment portions are provided downward on the lower side of the rear portion of the housing 11 of the main body 10 b. One mounting portion 31 is disposed on the front side and the other mounting portion 32 is disposed adjacent to the rear side, and the rail 31a of each mounting portion 31 is provided in the left-right direction as shown in FIG. Yes. 5, the battery pack B1 can be attached to the attachment portion 31 by moving the battery pack B1 from the left to the right (attachment direction) of the main body 10b with respect to the attachment portion 31 as indicated by a white arrow. . Conversely, the battery pack B1 is removed from the mounting portion 31 by releasing the locked state of the battery pack B1 and moving the battery pack B1 from the right to the left (removing direction) of the main body 10b with respect to the mounting portion 31. be able to. Since the attaching portion 31 is provided with a biasing member 31e that biases the battery pack B1 attached as described above in the removing direction, the battery packs B1 and B2 are automatically automatically to some extent just by releasing the lock in the attached state. Slide and remove easily.

In the second embodiment shown in FIG. 9, the first mounting portion 31 is disposed on the left side, the other mounting portion 32 is disposed on the right side, and the mounting direction of the battery packs B1 and B2 is the front-rear direction. Different from the embodiment. Furthermore, the third embodiment shown in FIG. 10 differs from the second embodiment in that the attachment direction of the battery packs B1 and B2 is inclined in a V shape. Since the attachment portions 31 and 32 of the first to third embodiments are arranged adjacent to each other in this manner, the attachment / removal work is facilitated. In particular, in the first and second embodiments, since the mounting direction is the same, the operation is easier. It is desirable that there is a space between the two battery packs B1 and B2 that allows the user to insert a finger. Specifically, the space is preferably about 15 mm or more. In this respect, the third embodiment has a V-shaped gap between the battery packs B1 and B2, so that the battery packs B1 and B2 can be pinched with fingers, and attachment and removal operations are easy. In particular, in the case of large battery packs B1 and B2 having a volume of 200 cm ³ or more, the two attachment portions 31 and 32 are arranged so that the distance between the two battery packs B1 and B2 is close to less than 15 mm. It is preferable to install. In this regard, in the first embodiment shown in FIG. 2, the two battery packs B1 and B2 attached are close to each other. Therefore, the overall shape of the blower main body 10b including the battery packs B1 and B2 can be spatially compactized.

  In addition to the above, the arrangement of the attachment portions 31 and 32 is also conceivable. For example, in the fourth to seventh embodiments shown in FIGS. 11 to 14, two mounting portions are provided symmetrically one on each of the left and right side surfaces of the housing 11. Only the left attachment 31 is shown in the figure. Among these, in the embodiment shown in FIG. 11 and FIG. 12, since the long side of the battery pack B1 is arranged on the overhanging portion 11b of the housing 11, the blower body 10b with the battery pack B1 attached is arranged. A relatively compact shape. The battery pack B1 is attached in the lateral direction from the rear to the front in any of the embodiments, but the orientation of the attachment surface may be lateral as shown in FIG. 11 or upward as shown in FIG. On the other hand, in the sixth and seventh embodiments, the orientation of the mounting surface is the left and right sides of the housing 11, but the mounting direction is as shown in FIG. As shown, the direction is inclined obliquely backward. In the eighth and ninth embodiments shown in FIGS. 15 and 16, the two attachment portions 31 and 32 are both provided at the rear end of the housing 11. Although only one side is shown in the figure, the two attachment portions 31 and 32 are arranged adjacent to each other on the left and right as in the second embodiment. The attachment direction may be a vertical direction from top to bottom as shown in FIG. 15, or may be inclined obliquely forward as shown in FIG.

[Blower and battery pack center of gravity]
The blower 10 and the battery packs B1 and B2 are heavy for the user considering that the blower 10 is held by hands and cleaning the dead leaves on the ground. It is important to consider. The battery pack attachment portions 31 and 32 are arranged at appropriate positions (or by appropriately changing the weight balance of other members), and thus the center positions of the battery packs B1 and B2 attached. It is desirable that the center of gravity position of the entire blower 10 including this battery pack be within the following range.

  First, as shown in FIG. 4, the center of gravity G of the entire blower 10 including the attached battery packs B1 and B2 is either left or right from the center plane MP of the lateral width (grip width) of the grip portion 21g of the handle 21. It may be shifted to the side. In the first and second embodiments shown in FIGS. 4 and 9, the center of gravity G is actually shifted to the left as an example. In particular, when the grip width dimension of the handle 21 is W, the center of gravity G of the entire blower 10 is preferably within a distance of 1.5 W on the left and right sides from the center plane MP of the grip width. Furthermore, it is even more preferable that the center-of-gravity position G is within a distance of 0.5 W on both the left and right sides (that is, within or directly below the grip portion 21g). In this way, when the handle 21 is held and the blower 10 is held, it is easy to balance the whole and the workability is improved.

  As shown in FIG. 4, the center of gravity of each of the attached battery packs B <b> 1 and B <b> 2 may also be shifted to the left or right side from the center plane MP of the grip width of the handle 21. In the second embodiment shown in FIG. 9, it is clear that the center of gravity positions of the battery packs B1 and B2 are on the left side and the right side, respectively, with respect to the center plane MP of the handle grip width. Also, the center of gravity of each battery pack B1, B2 is preferably within a distance of 1.5 W on both the left and right sides from the center plane MP of the grip width, similarly to the entire center of gravity.

[Mounting on the ground, etc.]
When the blower of the first to third embodiments is placed on a horizontal plane as shown in FIG. 2, the blower 10 is placed on a horizontal plane at three locations of the lowermost part of the main body 10b of the blower 10 and the two battery packs B1 and B2 attached. Can be grounded. In these embodiments, the lowermost portion of the main body 10 b is a portion where the intake port 15 is provided in the housing 11. Therefore, when the blower is placed on the ground or the like, the posture can be stabilized because it can be placed in contact with three places including the heavy battery pack. Furthermore, as shown in FIG. 2, the attached battery packs B1 and B2 are both located on the rear side of the lowermost part of the blower, and pass through this lowermost part and are parallel to the center line CL of the nozzle 13. It is arranged so as to be included on the upper side (including on the surface BP). Thereby, since the nozzle 13 extended ahead of the main body 10b does not touch the ground when placed on the ground or the like, there is little possibility of damaging the nozzle 13.

[Modification]
Note that the present invention is not limited to the above-described exemplary embodiments, and can be implemented in various other forms.

[Blower configuration]
In addition, as another form of a fan, as shown in FIG. 17, it is good also as a vertical type centering on the left-right direction. The blower 10 may have not only a function of blowing air from the nozzle 13 but also a function of collecting dust by sucking air into the nozzle 13.

[Battery pack and its mounting part]
The arrangement of the battery packs B1 and B2 is not limited to the above. For example, one battery pack may be attached to the attachment portions provided at various positions described in the above-described embodiment. In the above embodiment, an example in which two battery packs B1 and B2 having the same form are attached has been described. However, an attachment part to which battery packs having different volumes and weights may be provided.

  The output voltage and the number of the battery packs B1 and B2 are not limited to the above embodiment. For example, a plurality of battery packs having other output voltage specifications such as 14.4 V can be attached to serve as a power source for the electric motor having the total voltage as the rated voltage. In short, by installing multiple battery packs that are more widely used and using them as a power source for an electric motor that uses the total voltage as the rated voltage, multiple battery packs owned by the user for the purpose of backup etc. are effective. Therefore, it is possible to use the blower 10 with a higher output, and thereby, the spread of the blower 10 with a higher output can be achieved while suppressing the cost of the battery pack.

  The blower 10 may be used for a long time as a power supply circuit configuration in which a plurality of attached battery packs B1 and B2 are connected in parallel instead of in series depending on the purpose. Further, a combination of series and parallel may be used to achieve both high output and long time use.

  In addition to the slide mounting type as in the above-described embodiment, the battery pack mounting type may be a plug-in type battery pack. The battery pack may be attached in such a manner that the battery pack is exposed and attached so as to be visible from the outside as in the above-described embodiment, and a cover or a cover is provided so as not to be visible from the outside.

[Battery pack controller]
In particular, when a plurality of battery packs B1 and B2 are connected in series, it is desirable to include a controller that monitors and controls at least the voltage of each battery pack. The controllers of the battery packs B1 and B2 may be integrated with the motor controller that controls the driving state of the motor 41 (processing is performed by one microcomputer) or may be separate (processing is performed by separate microcomputers). May be. From the viewpoints of reducing the occupied space in the housing 11 and reducing the wiring, it is desirable that the two are integrated.

  The arrangement positions of the controllers of the battery packs B1 and B2 are preferably in the vicinity of the terminals 31b and 31c of the battery pack attachment portion 31 (reference numeral 45A in FIG. 2) from the viewpoint of wiring reduction. Further, from the viewpoint of cooling the controllers of the battery packs B1 and B2 that generate heat, they are usually arranged so as to be in contact with an air flow generated by a cooling fan (different from the blower fan 43) attached to the shaft of the motor 41. It is desirable that In other words, it is desirable to be arranged in the middle of either the air passage leading from the intake hole penetrating the housing 11 of the blower 10 to the cooling fan or the air passage leading from the cooling fan to the exhaust hole. In this case, it is desirable to arrange in the vicinity of the motor 41 that is more easily cooled (reference numeral 45B in FIG. 2).

[Notice of remaining battery pack capacity]
In particular, when a plurality of battery packs B1 and B2 are connected in series, the blower 10 cannot be used due to failure or discharge of any one of the battery packs B1 and B2. For this reason, in order to know which battery packs B1 and B2 are discharged, etc., the blower 10 is stopped, it is desirable to provide means for notifying the remaining capacity of each battery pack B1 and B2. 18 to 20 show visual indications 51 and 52 representing the remaining capacity by the number of bars to be lit as an example of notification means. As a method of notifying the user, in addition to using such a bar, a method of expressing the remaining capacity by color, blinking speed, and sound may be used. Further, the notification means may be configured to notify only when a button 53 as shown in FIGS. 18 to 20 is pressed.

  In the case of notification by visual display, the position of the display corresponding to each battery pack is spatially related to the arrangement of the battery packs B1 and B2 visible when the user installs the battery packs B1 and B2 or when the blower 10 is used. It is desirable to be provided in a corresponding arrangement. For example, when the battery packs B1 and B2 are arranged side by side as in the first embodiment, the corresponding displays 51 and 52 are also arranged side by side as shown in FIGS. When the battery packs B1 and B2 are arranged side by side as in the second embodiment, the corresponding displays 51 and 52 are also arranged side by side as shown in FIG. It should be noted that the position of the visual display is desirably on the upper side of the main body 10b as shown in FIG. 19 as an example so that it can be easily seen when using the blower 10.

  In addition, when the remaining capacity of the battery packs B1 and B2 becomes lower than a predetermined value (when the drive is stopped), means for indicating which one of the plurality of battery packs B1 and B2 is the cause (flashing lamp, red Display) may be provided.

DESCRIPTION OF SYMBOLS 10 Blower 10b Main body 11 Main body housing 13 Nozzle 15 Inlet 21 Handle 21g Grip part W Grip width of handle 41 Electric motor 43 Blowers 31, 32 Mounting part B1, B2 Battery pack

Claims (8)

A tubular nozzle for blowing wind so that branches and leaves can be blown off is provided on the front side of the housing. Electric blower for
A handle extending in the front-rear direction for gripping the user when using the blower in his / her hand is provided on the upper side of the housing,
A plurality of attachment portions each capable of attaching separate rechargeable battery packs to the housing; and the electric motor is driven by the power of the plurality of battery packs attached to the attachment portions. Electric blower. The electric blower according to claim 1,
When the size of the grip width in the left-right direction of the handle is W, the plurality of attachment portions are arranged so that the center of gravity position of the entire blower including the attached battery pack is on the left and right sides from the center plane of the handle grip width. The electric blower is disposed so as to be within a distance of 1.5 W. The electric blower according to claim 1 or 2,
The plurality of attachment portions are electric blowers arranged so that when the blower is placed on a horizontal plane, the blower can be grounded to the horizontal plane at at least two locations of the lowermost part of the blower and the attached battery pack. The electric blower according to claim 3,
The plurality of attachment portions are arranged such that the attached battery pack is positioned behind the lowermost portion of the blower in the front-rear direction and passes through the lowermost portion in the vertical direction and is parallel to the center line of the nozzle. An electric blower disposed so as to be included above a flat surface. An electric blower according to any one of claims 1 to 4, wherein
The plurality of attachment portions are electric blowers arranged so that the battery pack can be attached at an adjacent position and in the same direction. An electric blower according to any one of claims 1 to 5,
When the handle width dimension in the left-right direction of the handle is W, the center of gravity of each battery pack attached is within a distance of 1.5 W on the left and right sides from the center plane of the handle grip width. , Electric blower. An electric blower according to any one of claims 1 to 6,
The electric blower in which the position of the center of gravity of the entire blower including the attached battery pack is shifted to the left or right side from the center plane of the grip width of the handle. An electric blower according to any one of claims 1 to 7,
An electric blower in which the center of gravity of a plurality of attached battery packs is at least one on each of the left and right sides with respect to the center plane of the handle grip width.

Images