WO2014119174A1

WO2014119174A1 - Electric shearing device for gardening

Info

Publication number: WO2014119174A1
Application number: PCT/JP2013/084344
Authority: WO
Inventors: 次郎小田; 英明杉浦
Original assignee: 株式会社マキタ
Priority date: 2013-02-01
Filing date: 2013-12-20
Publication date: 2014-08-07
Also published as: JP2014147354A

Abstract

An electric shearing device (10) for gardening is provided with two sets of shearing blades (13) that are arranged on the front side of a housing so as to be capable of reciprocating movement relative to each other. An electric motor (41) that generates rotating movement and a conversion mechanism (43) that converts the rotating movement into the reciprocating movement of the two sets of shearing blades (13) relative to each other are provided within the housing (11). The electric shearing device (10) comprises a handle (21) that is provided to the upper side of the housing (11), that extends in the front/back direction, and that is used for gripping when a user picks up and uses the electric shearing device (10). The electric shearing device (10) is provided with a plurality of attachment sections (31, 32) that make it possible to individually attach separate rechargeable battery packs (B1, B2) to the housing (11). The electric motor (41) is driven using power from the plurality of battery packs (B1, B2) that are attached to the attachment sections (31, 32).

Description

Electric shearing tool for gardening

The present invention relates to an electric shearing tool for gardening that is driven by a rechargeable battery pack and used for hedge pruning, lawn mowing, and the like.

Japanese Patent Application Laid-Open No. 2011-172521 discloses a technique related to hedge trimming for hedge pruning. This hedge trimmer is a tool that is provided with a pair of shearing blades that are driven by the electric power of the battery pack and that reciprocally move relative to each other to enable pruning of the hedge. There are other tools similar to hedge trimmers called hedge clippers and lawn clippers.

Not only this type of horticultural tool, but also battery packs of electric tools are provided with output voltages of 18V or 36V, for example. 18V output battery packs are mainly used for hand-held tools that are relatively small and have a small output. In the case of relatively large (high output) tools that require higher output, larger 36V output battery packs are used. Used.

In recent years, high-powered electric tools such as gardening tools have been made cordless, and along with this, large 36V battery packs have become widespread, but still smaller 14.4V battery packs and 18V battery packs are still in use. Mainstream and widespread. Ordinarily, a user of an electric power tool prepares a plurality of spare battery packs and charges them in parallel with the work, so that a single electric tool 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, battery packs for electric tools can be used between multiple types of electric tools with the same power supply specifications. 18V battery packs are much more widespread than 36V battery packs, as 18V-specific power tools are abundant and widespread.

However, since it is not possible to divert the more widely used small 18V battery pack for the high-power electric tool that conventionally uses the 36V battery pack as a dedicated power source, the user cannot use the 36V battery pack dedicated to the high-power tool. There is a problem that the cost is high in this respect, and there is room for further improving the handleability of the high-power electric tool. As described above, it is desired to improve the convenience and handleability of the electric tool by making it possible to use the battery pack for low output as the power source of the electric tool having a relatively high output.

The gardening electric shearing tool obtained from one aspect of the present invention is provided with two sets of shearing blades provided on the front side of the housing so that they can be reciprocated so that they can be clipped with branches and leaves. An electric motor for generating movement and a conversion mechanism for converting this rotational movement into relative reciprocation of two sets of shear blades are provided in the housing. The electric shearing tool is provided with a handle extending in the front-rear direction for gripping the user when the user holds the tool in his / her hand on the upper side of the housing. The electric shearing tool also includes a plurality of attachment portions to which separate rechargeable battery packs can be attached to the housing, and the electric motor is driven by the power of the plurality of battery packs attached to the attachment portions. Composed.

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 position of the entire tool including the attached battery pack is 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. This stabilizes the balance when holding the handle and carrying the tool. 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 tool is placed on a horizontal surface, the lower surface of the tool and the attached battery pack can be grounded to the horizontal surface at at least two places. The As a result, when placing the tool on the ground or the like, the posture can be stabilized because it can be placed in contact with at least two places including the heavy battery pack. In addition, the center of gravity of the entire tool is preferably located between the lowermost part of the tool 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 tool in the front-rear direction and passes through the lowermost portion in the vertical direction. It arrange | positions so that it may be contained above the surface parallel to the shearing surface of a shearing blade. Thereby, since the shearing blade does not touch the ground when the tool is placed on the ground or the like, there is little possibility of damaging the shearing blade.

As another preferred embodiment, the plurality of attachment portions are arranged so that the battery pack can be attached by moving the battery pack in an adjacent position and in the same direction. Thereby, a battery pack can be attached and detached easily.

It is a perspective view of the whole tool concerning a 1st embodiment. It is a left view of the main-body part of the tool of FIG. It is a top view of the main-body part of the tool of FIG. It is a rear view of the tool of FIG. It is a bottom view of the main-body part of the tool 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. FIG. 8 is a cross-sectional view of the battery pack of FIG. 7 taken along line VIII-VIII. It is a perspective view which shows the whole tool which concerns on 2nd Embodiment. FIG. 10 is a rear view of the tool of FIG. 9. It is a bottom view of the main-body part of the tool of FIG. It is a bottom view of the main-body part of the tool which concerns on 3rd Embodiment. It is a left view of the main-body part of the tool which concerns on 4th Embodiment. It is a left view of the main-body part of the tool which concerns on 5th Embodiment. It is a left view of the main-body part of the tool which concerns on 6th Embodiment. It is a left view of the main-body part of the tool which concerns on 7th Embodiment. It is a left view of the main-body part of the tool which concerns on 8th Embodiment. It is a left view of the main-body part of the tool which concerns on 9th Embodiment. It is a top view of the said shearing blade part of the tool which changed the form of the shearing blade. It is a figure which shows the modification which provided the remaining capacity display of the battery in the tool 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 tool of FIG.

Various embodiments of the present invention will be described below with reference to the drawings. The parts denoted by the same reference numerals in the drawings 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.

[Tool body and shearing blade]
As an example of a horticultural electric shearing tool (hereinafter referred to as a tool) driven by an attached rechargeable battery pack, FIGS. 1 to 18 show a hedge trimmer that is mainly used for hedge pruning. . This type of tool 10 includes two sets of shearing blades 13 that are relatively reciprocally movable on the front side (the back side as viewed from the user) of the housing 11 of the main body 10b. The shear blade 13 can be used to clip the branches and leaves while supporting and moving freely. In the tool of this embodiment, as shown in FIG. 2, two sets of shearing blades 13 are arranged above and below so that the shearing surface SP is substantially horizontal. As shown in FIG. 1, each set of the plurality of shearing blades 13 is provided in a form that branches out from the linear frame 15 extending in the front-rear direction in front of the housing 11 toward both left and right sides.

Further, as shown in FIG. 2, the tool 10 includes an electric motor 41 that generates a rotational motion by the electric power of the attached battery packs B1 and B2, and a relative reciprocating motion between the two sets of shearing blades 13. The housing 11 is provided with a cam mechanism 43 for converting to the above. In FIG. 2, these positions are virtually shown by squares. Since specific configurations of the motor 41 and the cam mechanism 43 can be known, a detailed description is omitted here. The housing 11 of the tool body of this embodiment has a rounded shape, but generally has the longest front and back and the shortest left and right. Of the two sets of shear blades 13, the reciprocating shear blade 13 (the upper shear blade in the present embodiment) is attached to the front portion of the main body 10b via the cam mechanism 43.

As another form of the shearing blade, a frame 15 in which each of the two sets of shearing blades 13 extends in the left-right direction on the front side of the housing 11 like a conventionally known tool called a lawn hair clipper as shown in FIG. You may comprise in the form which comes out radially toward the front from. The radial shearing blades 13 are provided so as to be able to reciprocate in a circular arc shape from side to side about a certain vertical axis. The main body is supported by hand and moved forward along the ground, so that the shear blade 13 can be used to clip the lawn or the like.

[handle]
As shown in FIG. 1, the tool 10 is provided with two

handles

21 and 23 which are gripped when the user holds the tool 10 in his / her hand. One handle 21 is provided on the upper side of the rear portion of the housing 11 (front side when viewed from the user), and includes a grip portion 21g extending vertically (that is, generally in the front-rear direction) as viewed from above as shown in FIG. ing. The other handle 23 is attached to the upper side of the front portion (back side) of the housing 11 and includes a grip portion 23g extending sideways (generally in the left-right direction) as viewed from above as shown in FIG. The

handles

21 and 23 of the present embodiment are formed in a loop shape as shown in FIG. 1, and a part thereof is used as

grip portions

21g and 23g. A loop separate from the housing 11 is fixed to the housing 11 at the lower portion of the front handle 23, and the upper portion of the loop is a grip portion 23g in the left-right direction. On the other hand, the handle 21 on the rear side has a loop formed by making a hole in the housing 11 in the left-right direction, and a grip portion 21g is formed above the hole. Therefore, the rear handle 21 forms a part of the housing 11. Note that the front and

rear handles

21 and 23 do not necessarily have a closed loop shape, and may be a cantilevered handle having an interrupted end. In addition, the plate-like member attached to the housing 11 of the main body 10b between the front handle 23 and the shearing blade in FIG. 1 is a guard 25 that blocks the cut leaves from flying backwards.

The front and

rear handles

21 and 23 are provided with

switch levers

21s and 23s, respectively, as shown in FIG. The rear switch lever 21s is provided on the lower side of the grip part 21g, the front switch lever 23s is provided on the rear side of the grip part 23g, and the user holds the

grip parts

21g and 23g. The switch levers 21s and 23s can be turned on by an operation of pulling them with a finger. The power supply circuit is configured so that power is supplied from the battery to the motor only when both the switch levers 21s and 23s are simultaneously operated and turned on at the same time. Accordingly, the shearing blade cannot be continuously moved unless both the

hands

21 and 23 are grasped by both hands and the tool 10 is held.

As described above, the two handles are attached to the front part and the rear part of the housing 11, respectively, but the front part and the rear part are relative to each other with the front-rear direction as an axis as disclosed in Patent Document 1. You may comprise so that it can rotate. With this configuration, for example, the rear handle 21 is gripped with the right hand to hold the rear portion of the housing 11 in a fixed orientation, and the front handle 23 is moved to the left with the left hand (so that the grip portion 23g is vertical) or The direction of the shearing surface SP of the shearing blade 13 can be changed by tilting to the right and rotating the front part of the housing 11 with respect to the rear part.

[Battery pack]
As shown in FIG. 5, the housing 11 of the tool 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 housed in a case to achieve a predetermined output as shown in FIG. The battery cell C is, for example, a lithium ion battery, but may be another type of battery as long as it can be charged. The battery packs B1 and B2 can be repeatedly used as a power source for the tool 10 by being removed from the tool 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 18V output as an example, and when attached to the

attachment portions

31 and 32, they 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 in this way. Thereby, while being able to use effectively 18V battery pack B1, B2 for low outputs, the convenience and handleability of the high output tool 10 can be improved further. In particular, an 18V battery pack that is currently widely used including a spare battery pack or the like can be used, whereby the high-output tool 10 with a 36V specification can be used without purchasing a new 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 especially the battery pack B1 of a slide attachment type as 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, the attachment part 31 and the attachment part 31 are representatively attached. A description will be given using the battery pack B1. 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 mounting portion 31, the battery pack B1 can be mechanically attached to the tool body 10b and can be removed by the reverse operation. . Further, the battery pack B1 is electrically connected to the power supply circuit of the tool body 10b by connecting the positive and negative connection terminals Bd and Be of the battery pack B1 to the positive and

negative connection terminals

31b and 31c, respectively.

As shown in FIG. 6, the battery pack B1 is provided with a lock claw Bg for locking the battery pack B1 in the attached state with respect to the attachment portion 31 so as to be able to advance and retract 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 FIGS. 7 and 8, 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. Is provided on the surface adjacent to the surface provided with the lock claw Bg. 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 tool 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 10b. 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 FIGS. 9 to 11, one attachment portion 31 is disposed on the left side and the other attachment portion 32 is disposed on the right side, and the attachment direction of the battery packs B1 and B2 is the front-rear direction. Different from the first embodiment. Furthermore, the third embodiment shown in FIG. 12 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 tool main body 10b including the battery packs B1 and B2 can be spatially compactized.

Other than the above, the arrangement form of the

attachment portions

31 and 32 is also conceivable. For example, in the fourth and fifth embodiments shown in FIG. 13 and FIG. 14, two mounting portions are provided symmetrically on the left and right side surfaces of the housing 11, respectively, toward the side. Only the left attachment 31 is shown in the figure. The attachment direction may be a vertical direction from top to bottom as shown in FIG. 13 or may be inclined obliquely rearward as shown in FIG. In the sixth and seventh 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. Further, in the eighth and ninth embodiments shown in FIGS. 17 and 18, two

attachment portions

31 and 32 are provided at the lower portion and the rear end of the housing 11, respectively. The attachment direction of the attachment portion 32 provided at the rear end may be a vertical direction from top to bottom as shown in FIG. 15, or may be inclined obliquely forward as shown in FIG.

[Center of gravity of tool and battery pack]
The tool 10 and the battery packs B1 and B2 are heavy for the user in consideration of carrying out operations such as pruning with the tool 10 in hand, and the center of gravity of the tool 10 and the

handle

21 and 23 are considered in particular. It is important to do. 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. In addition, it is desirable that the center of gravity of the entire tool 10 including the battery pack be within the following range.

First, as shown in FIG. 4, the center-of-gravity position G of the entire tool 10 including the attached battery packs B1 and B2 is from the center plane MP of the lateral width (grip width) of the grip portion 21g of the handle 21 on the rear side. It may be shifted to either the left or right side. In the first and second embodiments shown in FIGS. 4 and 10, 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 tool 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 tool 10 is held by grasping the rear handle 21, it is easy to balance the whole and workability is improved.

As shown in FIG. 4, the center of gravity of each of the attached battery packs B1 and B2 may also be shifted to the left or right side from the center plane MP of the grip width of the rear handle 21. In the second embodiment shown in FIG. 10, it is clear that the gravity center 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 tools of the first to third embodiments are placed on a horizontal plane as shown in FIG. 2, they can be grounded to the horizontal plane at three places, that is, the lowermost part of the tool 10 and the two battery packs B1 and B2 attached. Therefore, when placing the tool on the ground or the like, the posture can be stabilized because the tool 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 positioned on the rear side of the lowermost part of the tool, and are parallel to the shearing surface SP of the shearing blade 13 through the lowermost part. It is arranged so as to be included above (including on the surface BP) from BP. Thereby, since the shearing blade 13 in front 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 shearing blade 13.

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

[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, the high-power electric tool 10 can be used, and thereby the high-power electric tool 10 can be spread while suppressing the cost of the battery pack.

The tool 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, the battery pack may be mounted in a plug-in type battery pack in addition to the slide mounting type as in the above-described embodiment. 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.

As the arrangement positions of the controllers of the battery packs B1 and B2, the vicinity of the

terminals

31b and 31c of the battery pack mounting portion 31 (reference numeral 45A in FIG. 2) is desirable from the viewpoint of reducing wiring. 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 That is, it is desirable that the tool 10 is disposed in the middle of either the air passage leading from the intake hole penetrating the housing 11 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 tool 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 pack B1, B2 is discharged, etc., by which the tool 10 is stopped, it is desirable to provide a means for notifying the remaining capacity of each battery pack B1, B2. 20 to 22 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. 20 to 22 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 tool 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. Note that the position of the visual display is desirably on the upper side of the main body 10b as shown in FIG. 21 as an example so as to be easily visible when the tool 10 is used.

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.

Claims

An electric shearing tool for horticulture for cutting and cutting branches and leaves,
Two sets of shearing blades provided relatively reciprocally are provided on the front side of the housing,
An electric motor that generates rotational motion and a conversion mechanism that converts this rotational motion into relative reciprocal motion of the two sets of shear blades are provided in the housing.
A handle extending in the front-rear direction for gripping the user when holding the tool in his / her hand is provided on the upper side of the housing,
A tool comprising a plurality of attachment portions to which separate rechargeable battery packs can be respectively attached to the housing, and the electric motor is driven by the power of the plurality of battery packs attached to the attachment portions. .
The gardening electric shearing tool 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 of the entire tool including the attached battery pack is located on both the left and right sides from the center plane of the handle grip width. The tool is arranged to be within a distance of 1.5 W.
A gardening electric shearing tool according to claim 1 or 2,
The plurality of attachment portions are arranged so that when the tool is placed on a horizontal plane, the tool can be grounded to the horizontal plane at at least two locations of the lowermost part of the tool and the attached battery pack.
The gardening electric shearing tool according to claim 3,
The plurality of attachment portions are arranged such that the attached battery pack is located on the rear side of the lowermost part of the tool in the front-rear direction and passes through the lowermost part in the vertical direction with the shearing surface of the shearing blade. A tool disposed so as to be included above a parallel plane.
The electric shearing tool for horticulture according to any one of claims 1 to 4,
The plurality of attachment portions are tools arranged so that the battery pack can be attached at an adjacent position and in the same direction.
A gardening electric shearing tool 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. tool.
The electric shearing tool for horticulture according to any one of claims 1 to 6,
A tool in which the position of the center of gravity of the entire tool including the attached battery pack is shifted to the left or right side from the center plane of the grip width of the handle.
A gardening electric shearing tool according to any one of claims 1 to 7,
A tool having at least one center of gravity of a plurality of attached battery packs on the left side and the right side with respect to the center plane of the grip width of the handle.