JP6568415B2 - Handheld rechargeable power tool - Google Patents

Description

  The present invention relates to a hand-held rechargeable power tool that uses a rechargeable battery pack as a power source.

  A rechargeable electric tool provided with a rechargeable battery pack is cordless, and is particularly convenient for a handheld electric tool. On the other hand, a large-sized battery pack is used to enable long-term use, and accordingly, the battery pack is not stored in the tool body but mounted outside the tool body. In particular, it is attached to the rear end of the tool body. However, since the battery pack is heavy, if it is attached to the rear end portion of the tool body, the balance of the center of gravity of the electric tool tends to shift to the rear side and becomes unstable.

  For example, FIG. 15 of Patent Document 1 below discloses a configuration in which a battery pack is mounted on the rear end portion of the tool body in an upright posture of 90 degrees. Further, FIG. 16 of Patent Document 1 discloses a configuration in which the battery pack is mounted on the rear end portion of the tool main body in a tilted posture in which the upper portion is the rear side and the lower portion is the front side with respect to the upright state. Has been. However, since the battery pack is heavy, when the battery pack located at the rear end is in an upright posture or a rearward tilted posture, the electric tool appears to rise and the appearance becomes unstable. Therefore, the user will also feel anxiety that the electric tool may be inclined to the rear side. The user unconsciously or consciously feels such instability in appearance. As a result, the user may be more likely to get tired because the power tool may be gripped more strongly than necessary or pressed from above so that the power tool does not tilt backward.

JP 2014-147354 A

  Therefore, the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a hand-held rechargeable power tool that has a sense of stability and can be easily operated.

  The present invention has been made to solve the above problems, and a hand-held rechargeable electric tool according to the present invention is a battery for detachably attaching a rechargeable battery pack to the rear end of a tool body. The battery pack is a hand-held rechargeable electric tool provided with an attachment portion, wherein the battery pack is attached in a forward inclined posture with an upper part being a front side and a lower part being a rear side.

  In the hand-held rechargeable power tool having such a configuration, the battery pack is attached to the rear end portion of the tool body. Even if the battery pack is located at the rear end, it will be difficult to see in the raised position, and the appearance will be stable. For example, when comparing a triangular shape and an inverted triangular shape, the inverted triangular shape feels unstable and the triangular shape feels more stable. Similar to this, even when the battery pack is located at the rear end, the battery pack is in a forward tilted posture, so that it is difficult to see in a raised position and it is felt that the battery pack is stable. That is, when the power tool is viewed, it looks like a mountain or triangle as a whole. Therefore, the user can work easily without unconsciously or consciously applying too much power. In addition, when there are battery packs with different thicknesses, assuming that the battery pack is mounted in a tilted posture, the battery pack may come into contact with the ground when the thick battery pack is attached. Since it is attached in an inclined posture, even if a thick battery pack is attached, there is no possibility that the battery pack contacts the ground.

  In particular, it is preferable that the battery attachment portion has a main body side connection surface that is inclined so that the upper portion is the front side and the lower portion is the rear side, and the battery pack is attached by sliding along the main body side connection surface. In this configuration, since the battery pack can be slid along the connecting surface on the main body side and attached to or removed from the tool main body, the battery pack can be easily attached and detached. Moreover, since the main body side connection surface of the battery mounting portion is inclined to the front side, when the battery pack is mounted, the main body side connection surface can be easily seen from above, and its position can be easily confirmed. Therefore, the battery pack can be easily attached.

  Further, the tool body includes a head portion having a driving portion and a handle portion extending rearward from the upper portion of the head portion, and gradually descends from the upper surface of the handle portion toward the body-side connection surface of the battery mounting portion. It is preferable that the stability of the appearance is further increased, and unnecessary force is less likely to be applied in the work.

  The tool body includes a head portion having a driving portion, a handle portion extending rearward from the upper portion of the head portion, and a rear end of the handle portion extending while gradually tilting upward from the lower portion of the head portion toward the rear. The battery mounting portion protrudes downward from the rear end portion of the support arm portion by a predetermined amount, and the battery pack is configured to be slid and mounted downward, and is attached to the battery mounting portion. The lower end portion of the battery pack preferably protrudes downward from the main body side connection surface by a predetermined amount and is at a height position equal to or higher than the lower end portion of the battery mounting portion. When the configuration is such that the battery pack is slid and mounted downward, the mounting operation is facilitated as compared to the configuration in which the battery pack is slid and mounted upward. In addition, when the lower end of the battery pack protrudes a predetermined amount downward from the connection surface on the main body side in a mounted state, and is at a height position higher than the lower end of the battery mounting portion, the battery pack is lowered and the appearance is stabilized. As the feeling increases, the center of gravity can be lowered, and the lower end portion of the battery pack does not protrude too much downward, so that the lower end portion of the battery pack can be prevented from contacting the ground or the like.

  The rechargeable power tool is a rechargeable lawn mower, and includes a slider at the bottom of the tool body, the slider extending rearward to the position of the battery mounting portion, and a battery at the rear end of the slider. It is preferable that an escape portion for avoiding interference with the attachment portion or the battery pack is formed. In the configuration in which the heavy battery pack is located at the rear end, the front portion of the lawn mower tends to rise. Therefore, it is preferable to extend the slider to the rear, which increases the stability of the lawn mower. On the other hand, in order to lower the center of gravity as much as possible, the battery mounting portion and the battery pack are preferably positioned on the lower side. Then, by forming an escape portion at the rear end of the slider, the slider can be extended to the rear by preventing interference between the slider and the battery mounting portion or the battery pack, and the battery mounting portion or battery pack can be It can be located below.

  As described above, when the battery pack is tilted forward, a sense of stability is increased and it is possible to suppress an excessive force from being applied to the hand holding the electric tool, and as a result, the work load is reduced.

The front view which shows the state which was the handheld rechargeable lawn mower in one Embodiment of this invention, and attached the battery pack. The front view which shows the state which removed the battery pack of the rechargeable lawn mower. It is the figure which looked at the same rechargeable lawn mower from back, (a) shows the state where the battery pack was attached, and (b) shows the state where the battery pack was removed. The figure seen from the bottom side which shows the state which attached the battery pack of the rechargeable lawn mower. The figure seen from the bottom face side which shows the state which removed the battery pack of the rechargeable lawn mower. Sectional drawing which shows the state which removed the battery pack of the rechargeable lawn mower. AA schematic sectional drawing of Fig.3 (a). The top view which shows the battery pack of the rechargeable lawn mower. The front view which shows the battery pack of the rechargeable lawn mower. BB sectional drawing of FIG. The figure which looked at the battery pack of the rechargeable lawn mower from the front side in the mounting direction. The front view which shows the state which was the handheld rechargeable lawn mower in other embodiment of this invention, and attached the battery pack. It is the figure which looked at the same rechargeable lawn mower from back, (a) shows the state where the battery pack was attached, and (b) shows the state where the battery pack was removed. The figure seen from the bottom side which shows the state which attached the battery pack of the rechargeable lawn mower. The front view which shows the state which was the handheld rechargeable lawn mower in other embodiment of this invention, and attached the battery pack. The front view which shows the state which removed the battery pack of the rechargeable lawn mower.

  Hereinafter, a rechargeable lawn mower as a hand-held rechargeable power tool according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11. The lawn mower in the present embodiment includes a tool main body 1 and a rechargeable battery pack 5 that is detachably attached to the tool main body 1. The battery pack 5 can be attached to and detached from the tool body 1 and can be detached from the tool body 1 and connected to a charger (not shown) for charging. The tool body 1 and the battery pack 5 are provided with connection surfaces (attachment surfaces) that are connected to each other. The connection surface on the tool body 1 side is referred to as the body-side connection surface, and the connection on the battery pack 5 side is provided. The surface is referred to as a pack-side connection surface. In the drawing, the attachment direction of the battery pack 5 is indicated by an arrow P, the removal direction is indicated by an arrow Q, and the attachment direction and the removal direction are collectively referred to as an attachment / detachment direction. For convenience, the attachment direction may be referred to as the front side and the removal direction may be referred to as the rear side.

<Battery pack 5>
The battery pack 5 is shown in FIGS. 8 is a view of the battery pack 5 as seen from the connection surface side, FIG. 9 is a view of the battery pack 5 as seen from the side that is orthogonal to the mounting direction and the detaching direction, and FIG. FIG. 11 is a cross-sectional view taken along line B-B, and FIG. 11 is a view of the battery pack 5 as viewed from the front side.

  The battery pack 5 is mounted on the tool body 1 with its upper surface facing the front side. The battery pack 5 is configured to be attached to and detached from the tool main body 1 and the sliding direction is a direction along the main body side connection surface or the pack side connection surface. In addition, the attachment / detachment direction mentioned above becomes a slide direction. The battery pack 5 is a box type as a whole, and is specifically a rectangular parallelepiped that is long along the attaching / detaching direction, and its upper surface is a pack-side connection surface. When the battery pack 5 is viewed from the pack-side connection surface side as shown in FIG. 8, the battery pack 5 is a rectangle that is long along the attaching / detaching direction. In FIG. 8, the attaching / detaching direction is the long side direction, but is orthogonal thereto. The short side direction is referred to as the width direction. Then, assuming that the normal direction of the pack side connection surface is the vertical direction and the dimension in that direction is the thickness, the battery pack 5 is a rectangular parallelepiped having a small thickness with respect to the dimension in the attaching / detaching direction and the dimension in the width direction. .

  On the upper surface of the battery pack 5, a base surface 50 made of a flat surface is formed on the front side and the left and right sides of the peripheral portion, and the center portion protrudes one step above the base surface 50. A hill part 51 is formed. The upper surface 51a of the hill part 51 is a flat surface. A pack-side connection surface is constituted by the base surface 50 and the upper surface 51 a of the hill portion 51. Note that an inclined surface 52 is formed on the rear side of the base surface 50 so as to gradually increase toward the rear. The inclined surface 52 extends to a position higher than the upper surface 51 a of the hill 51. A ridge 53 is formed at the rear end of the upper surface of the battery pack 5 with an inclined surface 52 extending rearward from the base surface 50 as a front slope. It extends horizontally from the middle to the front. The thickness of the battery pack 5 is the thickest at the peak portion 53 a of the peak portion 53.

  A pack-side terminal 54 for electrically connecting to the tool body 1 is provided at the front end portion of the hill portion 51. The pack side terminals 54 exist in a plurality of rows and are arranged at intervals along the width direction of the battery pack 5. In the present embodiment, a total of five rows of pack side terminals 54 are arranged. The central row is a dummy terminal. The main body side terminal 24 of the tool main body 1 is connected to the pack side terminal 54. For example, the pack side terminal 54 is a female side, the main body side terminal 24 is a male side, and the main body side terminal 24 is a pack side. The terminal 54 is configured to be inserted along the attaching / detaching direction. Therefore, the pack-side terminal 54 has a shape opened to the front side, and is open to the front end surface of the hill part 51.

  Since the battery pack 5 is slidably mounted on the tool body 1, slide rails that engage with each other are formed on the tool body 1 and the battery pack 5 along the attaching / detaching direction. The slide rail of the tool main body 1 is referred to as a main body side slide rail 25, and the slide rail on the battery pack 5 side is referred to as a pack side slide rail 55. The main body side slide rail 25 and the pack side slide rail 55 have a shape extending along the attaching / detaching direction, and are configured to engage with each other as shown in FIG. 7 when cut along a cutting plane orthogonal to the attaching / detaching direction. ing. In FIG. 7, the internal structure is omitted. Specifically, the main body side slide rail 25 and the pack side slide rail 55 engage with each other in the width direction of the battery pack 5 and slide along the attachment / detachment direction.

  The main body side slide rail 25 and the pack side slide rail 55 are respectively formed in a pair of left and right. Of the pair of left and right main body side slide rails 25 and the pair of left and right pack side slide rails 55, one is a male side and the other is a female side. In this embodiment, the main body side slide rail 25 is a female side. The pack side slide rail 55 is the male side that enters the inside of the main body side slide rail 25. The pack-side slide rail 55 is formed on the left and right side surfaces of the hill part 51 of the battery pack 5. Specifically, a groove 55b is formed in the lower part of the side surface of the hill part 51 along the attaching / detaching direction, and the groove part 55b is relatively formed in the upper part of the side surface of the hill part 51 by forming a groove 55b in the lower part of the side surface of the hill part 51. Convex ridges 55a projecting sideways are formed along the attaching / detaching direction, and the pack-side slide rail 55 is constituted by the upper ridges 55a and the lower concave grooves 55b. The pair of left and right pack side slide rails 55 are symmetrical with each other. When the battery pack 5 is cut in the vertical direction so as to cross the pack-side slide rail at the place where the pack-side slide rail 55 is formed, the cross-sectional shape of the elevated portion 50 becomes a T-shape as shown in FIG.

  Further, an opening is formed in the rear part of the upper surface 51a of the hill part 51, and the lock claw 56 projects upward from the opening. The lock claw 56 is detachably engaged with the lock recess 26 of the tool body 1 shown in FIG. Specifically, when the locking claw 56 engages with the locking recess 26 of the tool body 1, the battery pack 5 is locked in the mounted state, and when the locking claw 56 is removed from the locking recess 26 of the tool body 1, the locked state is changed. The battery pack 5 can be removed from the tool body 1 after being released. The lock claw 56 is configured to be movable up and down. The state in which the lock claw 56 moves upward and the amount of protrusion from the upper surface 51a of the hill part 51 is large is the locked state and is engaged with the lock recess 26 of the tool body 1. The state in which the amount of protrusion from the upper surface 51a of the hill part 51 is reduced by moving downward is the unlocked state, and is the state in which it is removed from the locking recess 26 of the tool body 1. 8-11 has shown the case where the lock nail | claw 56 is a locked state. The lock claw 56 is urged toward the locked state and is always in the locked state. That is, the lock claw 56 is biased upward. Further, an inclined surface is formed at the front portion of the lock claw 56. Further, the lock claw 56 has a long shape in the width direction of the battery pack 5.

  On the rear side of the hill part 51, an unlock button 57 is provided as an unlock operation unit for changing the lock claw 56 from the locked state to the unlocked state. The lock release button 57 is located at the rear end portion of the battery pack 5 and is provided on the slope on the rear side of the mountain portion 53. When the lock release button 57 is pushed downward, the lock claw 56 is lowered from the lock position to the lock release position to release the lock state. When the release force is released by releasing the lock release button 57, the lock is released. The release button 57 returns to the original state, and accordingly, the lock claw 56 also returns to the lock position. There may be various configurations for interlocking the lock release button 57 and the lock claw 56. However, in this embodiment, the lock release button 57 and the lock claw 56 are integrally formed as one member. As a result, the lock claw 56 is biased toward the lock position. The biasing means is arbitrary, but the lock release button 57 can be biased upward by a spring (not shown), for example.

  The battery pack 5 includes a battery accommodating portion 58 that is lower than the pack-side connecting surface and wider than the pack-side connecting surface, and a plurality of batteries 59 are incorporated in the accommodating portion as shown in FIG. ing. The battery pack 5 includes a hollow pack housing 60 to accommodate the battery 59. The pack housing 60 includes two upper and lower parts that are halved, and the two parts are joined together to form a hollow shape. The above-described hill part 51 and peak part 53 are formed in the upper part constituting the pack housing 60. Further, a movable member 61 (see FIG. 10) is provided as a separate structure from the pack housing 60, and a part of the movable member 61 is configured as a lock release button 57 and a lock claw 56.

<Tool body 1>
The tool body 1 is shown in FIGS. 1 to 7, and FIG. 2, FIG. 3 (b) and FIG. 6 with the battery pack 5 attached in FIGS. 1, 3 (a), 5 and 7. Is a state in which the battery pack 5 is removed. The tool body 1 is attached to a shear blade 2 for shearing the lawn that is an object to be cut, a drive unit for driving the shear blade 2, a hollow body housing 3, and a lower side of the body housing 3. The slider 4 is provided.

<Shearing blade 2>
The shearing blade 2 is composed of two blades provided so as to be relatively reciprocable. Specifically, the movable blade is composed of a fixed blade and a movable blade, and the movable blade is reciprocated in the lateral direction with respect to the fixed blade. It may be configured to reciprocate in the opposite direction. A comb blade-shaped guide 2 a is disposed below the shearing blade 2.

<Driver>
The drive unit includes a drive motor 6 and a drive transmission unit 7 that decelerates the rotation of the drive motor 6 and converts the rotational motion into a left and right reciprocating motion to transmit a driving force to the shearing blade 2. The drive motor 6 is disposed such that the center of rotation is in the vertical direction and the main shaft 6a faces downward. The drive transmission unit 7 is located between the main shaft 6 a of the drive motor 6 and the shearing blade 2, and is therefore located below the drive motor 6. Electric power is supplied to the drive motor 6 from the battery pack 5 through a drive switch for stopping the operation of the drive motor 6. The drive switch includes a switch body 8a and a trigger 8b for turning on and off the switch body 8a. The trigger 8b is provided on the lower surface 11b of the handle portion 11 of the main body housing 3 which will be described later, and projects downward from the lower surface 11b. When the trigger 8b is pushed upward, the drive switch is turned on and electric power is supplied to the drive motor 6 to operate the drive motor 6. The trigger 8b is biased downward. When the force pushing the trigger 8b is released, the trigger 8b returns to the original position, the drive switch is turned off, and the drive motor 6 is stopped. In the present embodiment, the trigger 8b is configured to rotate up and down about the front support shaft 8c.

<Main body housing 3>
The main body housing 3 is composed of two left and right parts that are halved, and becomes hollow by joining these two parts. The main body housing 3 includes a head portion 10 located at a front end portion, a handle portion 11 extending rearward from the upper portion of the head portion 10, and a support arm extending while gradually tilting upward from the lower portion of the head portion 10 toward the rear. Part 12 and battery mounting part 13 located at the rear end.

  The head unit 10 accommodates a drive unit. The handle part 11 has a cylindrical shape extending in the front-rear direction as a whole. The handle portion 11 accommodates an electric cable (not shown) for electrically connecting the battery pack 5 attached to the battery attachment portion 13 and the drive motor 6, and a drive switch is arranged in the middle of the electric cable. It is installed. Therefore, the drive switch is accommodated in the handle portion 11. The entire switch body 8 a is accommodated in the handle portion 11, and the trigger 8 b protrudes downward from the lower surface 11 b of the handle portion 11. The upper surface of the main body housing 3 has a highest apex portion 10a on the upper surface of the head portion 10, and has a shape that gradually descends from there. Accordingly, the upper surface 11a of the handle portion 11 is gently lowered toward the rear.

  The rear end portion of the handle portion 11 and the rear end portion of the support arm portion 12 are connected to each other. Therefore, the head portion 10, the handle portion 11, and the support arm portion 12 are formed in a loop shape as a whole. The support arm portion 12 is also formed in a cylindrical shape like the handle portion 11, but its center line gradually rises toward the rear. Therefore, an inclined surface that rises rearward is formed on the lower surface of the support arm portion 12, and the slider 4 is attached to the inclined surface. That is, a slider attachment portion 12a for attaching the slider 4 to the main body housing 3 is formed on the lower surface of the support arm portion 12. This configuration will be described later.

  A battery mounting portion 13 is formed at the rear end portion of the main body housing 3. The rear end portion of the main body housing 3 is a connecting portion between the handle portion 11 and the support arm portion 12 and is also a loop-shaped folded portion of the main body housing 3. The battery attachment portion 13 is formed at the rear end portion of the main body housing 3 so as to protrude rearward. The upper end portion of the battery attachment portion 13 is continuous with the rear end portion of the upper surface 11 a of the handle portion 11, but the lower end portion of the battery attachment portion 13 projects downward from the rear end portion of the support arm portion 12.

  The battery attachment portion 13 is configured to attach the battery pack 5 to the rear surface thereof. Accordingly, the battery mounting portion 13 has a shape corresponding to the shape of the battery pack 5 and has a vertically long rectangular parallelepiped shape as viewed from the rear as shown in FIG. The rear surface of the battery attachment portion 13 is a main body side connection surface, and therefore the main body side connection surface faces rearward. When the battery pack 5 is mounted, the main body side connection surface and the pack side connection surface are in a relationship of facing each other. Therefore, when the battery pack 5 is mounted, the rear surface of the battery mounting portion 13 and the upper surface of the battery pack 5 face each other and come into surface contact with each other or face each other through a slight gap.

  The battery pack 5 is attached to the battery attachment portion 13 of the tool body 1 in a forward tilt posture in which the upper part is the front side and the lower part is the rear side. Therefore, the battery mounting portion 13 is configured such that the battery pack 5 is mounted in a forward tilt posture, and includes a main body side connection surface that is inclined so that the upper portion is the front side and the lower portion is the rear side. The battery pack 5 is attached and detached while sliding along the main body-side connection surface in the forward tilted posture, but when attached, the battery pack 5 slides obliquely rearward from the upper side. Note that the forward leaning posture is a posture in which the battery mounting portion 13 and the main body side connection surface are tilted forward from the upright posture, and the tilt angle from the upright state is 45 degrees or less.

  The rear surface of the battery attachment portion 13 has a shape corresponding to the shape of the upper surface of the battery pack 5. Specifically, as shown in FIGS. 3 to 5, the dimension in the left-right direction of the battery mounting portion 13, that is, the width is substantially the same as the width of the pack-side connection surface of the battery pack 5. Therefore, the width of the battery mounting portion 13 is narrower than the battery accommodating portion 58 of the battery pack 5, and thus is narrower than the entire width of the battery pack 5. On the other hand, the left and right dimensions of the battery mounting portion 13 are larger than the left and right dimensions of the handle portion 11 and the left and right dimensions of the support arm portion 12. It has a wide shape projecting to the left and right sides with respect to the end portion and the rear end portion of the support arm portion 12.

  On the rear surface of the battery mounting portion 13, a mounting reference surface 20 that is a surface facing the upper surface 51 a of the hill portion 51 of the battery pack 5 is formed. The attachment reference plane 20 is an inclined plane in a forward inclined posture. Peripheral wall portions project from the left and right side portions and the lower end portion of the mounting reference surface 20. That is, the peripheral wall portion is formed on three sides excluding the upper end portion of the attachment reference surface 20 and is composed of a pair of left and right lateral wall portions 21 and a lower wall portion 22, and has an overall U-shape that opens upward. Is formed. The rear end surface 23 of the peripheral wall portion, which is the surface farthest from the attachment reference surface 20 among the peripheral wall portions, is an inclined plane in a forward inclined posture, and is in parallel with the attachment reference surface 20. The rear end surface 23 of the peripheral wall portion faces the base surface 50 of the battery pack 5. A main body side connection surface is constituted by the attachment reference surface 20 and the rear end surface 23 of the peripheral wall portion.

  A main body side terminal 24 is disposed at a lower end portion of the attachment reference surface 20 and above the lower wall portion 22. Since the battery pack 5 is mounted on the battery mounting portion 13 by sliding downward from above, the main body side terminal 24 extends upward. A plurality of main body side terminals 24 are arranged at intervals along the width direction of the battery mounting portion 13, and a total of four rows are arranged in this embodiment.

  A main body side slide rail 25 is formed on each of the inner side surfaces of both lateral wall portions 21. Specifically, on the inner side surface of the lateral wall portion 21, a concave groove 25 b is formed along the attachment / detachment direction, that is, along the forward tilt direction, in the front portion that is closer to the attachment reference surface 20. Convex ridges 25a that are relatively protruded inward by forming concave grooves 25b in the rear part that is on the far side are formed along the attaching / detaching direction, and these front concave grooves 25b and rear side grooves 25b The main body side slide rail 25 is comprised from the protruding item | line 25a. The pair of left and right main body side slide rails 25 are symmetrical to each other. Then, in the state where the battery pack 5 is mounted as shown in FIG. In other words, the pack-side slide rail 55 is inserted inside the pair of left and right body-side slide rails 25, and the pack-side slide rail 55 is held by the pair of left and right body-side slide rails 25 from both the left and right sides. Become. Then, the concave groove 25b of the main body side slide rail 25 and the convex stripe 55a of the pack side slide rail 55 are engaged with each other, and the convex stripe 25a of the main body side slide rail 25 and the concave groove 55b of the pack side slide rail 55 are unevenly engaged. To do.

  A locking recess 26 is formed on the upper side of the attachment reference surface 20. The locking recess 26 has a shape corresponding to the locking claw 56. Since the lock claw 56 has a shape that is long in the width direction of the battery pack 5, the lock recess 26 has a correspondingly long shape in the left-right direction, and is specifically formed in a groove shape extending in the left-right direction. ing. The locking recess 26 is located immediately above the upper end of the lateral wall portion 21.

  An introduction surface 27 is formed on the upper side of the rear end surface 23 of the horizontal wall portion 21 so as to face the inclined surface 52 of the peak portion 53 when mounted, corresponding to the inclined surface 52 of the peak portion 53 of the battery pack 5. The introduction surface 27 is continuous with the rear end surface 23 of the lateral wall portion 21, but is narrower than that. Further, the rear end surface 23 of the horizontal wall portion 21 is inclined to the front side by a predetermined angle with respect to the upright posture, but is inclined so as to be inclined further to the front side.

  In addition, although the peak part 53a of the peak part 53 of the battery pack 5 is located in the upper end part of the battery attachment part 13, the height of the upper end part of the battery attachment part 13 is the rear end part of the upper surface 11a of the handle part 11. It is almost the same as the height. Accordingly, the height gradually decreases from the upper surface 11 a of the handle portion 11 to the rear end surface 23 of the peripheral wall portion of the battery mounting portion 13 through the introduction surface 27 toward the rear side. In the present embodiment, the height of the upper surface 11a of the handle portion 11 is the lowest at the rear end portion, and therefore the lowest lowermost portion 11c of the upper surface 11a of the handle portion 11 is the lowest of the handle portion 11. Although it is located at the rear end portion of the upper surface 11a, the introduction surface 27 of the battery mounting portion 13 may be continuously provided after the height slightly rises further toward the rear side from the lowermost portion 11c. However, the lower end 11c of the upper surface 11a of the handle portion 11 should be lower at least at the upper end of the battery-side connection surface of the battery mounting portion 13 (the portion indicated by reference numeral 23a in FIGS. 2 and 6). preferable.

  Further, the battery mounting portion 13 protrudes downward by a predetermined amount from the rear end portion of the support arm portion 12, but in the state where the battery pack 5 is mounted as shown in FIG. A certain lowermost part 5a protrudes a predetermined amount below the rear end face 23 of the peripheral wall part which is the main body side connection surface. Specifically, the lowermost part 5a of the battery pack 5 in the mounted state is the front end portion of the battery pack 5 in the mounting / detaching direction in the single state before mounting shown in FIG. The front end portion of the base plate protrudes from the base surface 50 by a predetermined amount. The base surface 50 of the battery pack 5 coincides with the rear end surface 23 of the peripheral wall portion of the battery mounting portion 13 in the mounted state. Therefore, when the battery pack 5 is attached to the tool body 1, the lowermost portion 5a of the battery pack 5 protrudes downward from the rear end face 23 of the peripheral wall portion by a predetermined amount. On the other hand, the battery mounting portion 13 is inclined forward, and the front end portion of the lower end surface thereof, or the boss portion for screwing the parts of the pack housing 60 to each other at the front end portion of the battery pack 5 in the attaching / detaching direction. In the case where the battery mounting portion 13 is provided, the boss portion is the lowest portion 13a which is the lowest portion of the battery mounting portion 13, but the lowermost portion 5a of the battery pack 5 is the same height as the lowermost portion 13a of the battery mounting portion 13. Or higher than that. Therefore, the battery pack 5 does not protrude downward from the battery mounting portion 13 when mounted.

<Slider 4>
The slider 4 has a sliding surface 40 which is a flat plane on the bottom surface, and the sliding surface 40 slides on the grass when mowing the lawn. Therefore, the sliding surface 40 of the slider 4 is an installation surface when the lawn mower is placed on the ground, and becomes a cutting reference plane that determines the height of the lawn mowing in the lawn mowing work. The height of the blade 2 is the grass cutting height. In this embodiment, the slider 4 is configured to be adjustable in height, and the height of lawn cutting can be adjusted by the configuration. The configuration for adjusting the height of the slider 4 may be various, but in this embodiment, the height of the slider 4 can be changed by changing the mounting height of the slider 4 to the main body housing 3. . Specifically, the slider 4 has a wide main portion 41 having the above-described sliding surface 40 and a narrow attachment piece portion 42 extending rearward from the rear end portion of the main portion 41. . The main portion 41 covers the lower side of the front portion of the support arm portion 12 from the head portion 10 of the main body housing 3 as shown in FIGS. 1 and 2. As shown in FIGS. 4 and 5, the attachment piece portion 42 is formed narrower than the main portion 41 and is positioned below the support arm portion 12. The attachment piece 42 extends while being inclined rearward and upward along the lower surface of the support arm portion 12. The attachment piece portion 42 is narrower than the support arm portion 12. The attachment piece 42 is attached to and opposed to the slider attachment portion 12a formed of an inclined surface formed on the lower surface of the support arm portion 12, and can be slid along the inclination of the slider attachment portion 12a. That is, the mounting piece 42 is provided with a height adjusting mechanism for adjusting the height of the slider 4. When the mounting position of the slider 4 is at the rearmost position, the height of the slider 4 is the highest. The grass will be cut short. On the other hand, when the mounting position of the slider 4 is set to the foremost side, the height of the slider 4 becomes the lowest and the length of the lawn after cutting is increased. Thus, by moving the slider 4 back and forth along the slider mounting portion 12a which is the inclined surface 52, the slider 4 can be moved up and down and its height can be adjusted. 1 to 6 show a state in which the slider 4 is positioned on the uppermost side and the rear side. The slider 4 can be slid by releasing the fixed state by pressing the pressing portion 44 of the attachment piece portion 42 upward, and is fixed when the pressing to the pressing portion 44 is stopped.

  In the lawn mower configured as described above, the battery pack 5 can be slid and mounted on the battery mounting portion 13 along the direction indicated by the arrow P in FIG. Since the battery pack 5 and the battery mounting portion 13 are provided with the pack side slide rail 55 and the main body side slide rail 25, respectively, the battery pack 5 can be slid smoothly and reliably, and the main body side terminal 24 is connected to the pack side terminal. 54 is securely connected. Thus, when the battery pack 5 is mounted, since the main body side connection surface of the battery mounting portion 13 is inclined forward, the main body side connection surface and the main body side slide rail 25 can be easily visually recognized from above. Therefore, the battery pack 5 can be easily and reliably attached. Further, since the battery pack 5 is configured to be slid and mounted from the top to the bottom, the mounting operation is facilitated as compared with the configuration in which the battery pack 5 is slid and mounted from the bottom to the top.

  When the battery pack 5 is slid to a predetermined position, the lock claw 56 of the battery pack 5 engages with the locking recess 26 of the battery mounting portion 13 and the battery pack 5 is locked at the predetermined position. Therefore, the battery pack 5 is not inadvertently detached from the tool body 1. Conversely, when removing the battery pack 5 from the tool body 1, the battery pack 5 may be slid along the direction indicated by the arrow Q so as to pull up the battery pack 5 while pressing the lock release button 57. Can do.

  When the battery pack 5 is mounted, the battery pack 5 is tilted forward, so that even if the heavy battery pack 5 is located at the rear end, it is difficult to see the upside-down state and the appearance is stable. coming out. Therefore, the user can perform the work comfortably without unconsciously or consciously applying too much force when performing the lawn mowing work. Especially with hand-held power tools, this kind of visual stability has a considerable impact on the user's psychology, so the battery pack 5 can be mounted in a forward-tilting position to provide a stable appearance. Is big. In particular, since it gradually descends from the upper surface 11a of the handle portion 11 toward the connection surface on the main body side of the battery mounting portion 13, the mounting position of the battery pack 5 is lowered and the visual stability is further increased. Unnecessary force during work is further difficult to enter, and the work load is reduced.

  In the mounted state, the lowermost part 5a of the battery pack 5 protrudes downward by a predetermined amount from the main body-side connection surface, and the lowermost part 5a of the battery pack 5 is positioned below the lowermost part 13a of the battery mounting part 13. If not, the attachment position of the battery pack 5 can be lowered, and the visual stability can be increased and the center of gravity can be lowered. Moreover, since the lowermost part 5a of the battery pack 5 does not protrude too much downward, the lowermost part 5a of the battery pack 5 can be prevented from coming into contact with the ground or the like.

  There may be a plurality of types of battery packs 5 having different thicknesses. In particular, when the capacity of the battery pack 5 is increased in order to enable long-term use, the thickness of the battery pack 5, particularly the thickness of the battery housing portion 58, increases accordingly. Even if such a thick battery pack 5 is attached, the battery pack 5 is attached in a forward tilted posture, and therefore, there is no possibility that the battery pack 5 contacts the ground as in the case of the thin battery pack 5. Therefore, the thick battery pack 5 can be attached and used with peace of mind.

  The configuration of the slider 4 may be various. For example, the slider 4 may be a large slider 4 extending rearward as shown in FIGS. The slider 4 extends beyond the support arm portion 12 to the rear side and reaches the position of the battery mounting portion 13. In particular, the sliding surface 40 of the slider 4 extends to the position of the battery mounting portion 13. As shown in FIG. 14, an escape portion 45 for avoiding interference with the battery attachment portion 13 is formed at the rear end portion of the slider 4. The escape portion 45 is formed at the center in the left-right direction at the rear end of the slider 4 and has a shape recessed toward the front as compared with the left and right sides. That is, a clearance 45 that is recessed forward is formed at the center in the left-right direction at the rear end of the slider 4, and the sliding surface 40 extends to positions on both the left and right sides.

  More specifically, the rear portion of the main portion 41 of the slider 4 is bifurcated to the left and right and extends rearward, and the bifurcated portion 46 is below the battery mounting portion 13 and to the left and right positions. It extends. As the bifurcated portion 46 extends in the rear portion of the main portion 41 in this way, the sliding surface 40 also extends in a bifurcated shape. The attachment piece 42 is integrally connected between the bifurcated portion 46 with no space between the bifurcated portion 46. The bifurcated portion 46 has a sliding surface 40 and extends horizontally, whereas the attachment piece portion 42 gradually rises rearward in accordance with the inclination of the support arm portion 12. The mounting piece 42 is provided with a height adjusting mechanism for adjusting the height of the slider 4. In this embodiment, the dial 47 is rotated left and right to switch between a fixed state and a fixed release state, and the height is adjusted. When the dial 47 is rotated to a predetermined angle, the fixed release state is set. 4 can be moved back and forth and up and down along the inclination of the slider mounting portion 12a. When the dial 47 is rotated to the other side by a predetermined angle, the slider 4 can be fixed and fixed at that position. 12 to 14 show a state in which the slider 4 is positioned on the uppermost side and the rear side.

  Thus, even if the slider 4 is positioned on the uppermost side and the rear side, the escape portion 45 is formed at the rear end portion of the slider 4, so that interference between the slider 4 and the battery mounting portion 13 can be avoided. In addition, the battery mounting portion 13 is not obstructive even when the dial 47 is rotated. Since the sliding surface 40 extends rearward to the positions on the left and right sides below the battery mounting portion 13, the lawn mower becomes stable in posture and hardly swings back and forth. Can be kept constant. Moreover, the heavy battery pack 5 can be lowered without interfering with the slider 4, and the center of gravity can be lowered. In addition, you may provide the wire guard 9 in the front-end part of the tool main body 1 as shown in FIGS. In addition, when forming the standing wall part standing upright on the peripheral part of the slider 4, you may form the escape part 45 by notching a part of the standing wall part below.

  Moreover, as shown in FIG.15 and FIG.16, the structure which attaches the battery pack 5 toward the upper direction from the downward direction, and removes it below may be sufficient. Furthermore, the structure which attaches / detaches the battery pack 5 to the left-right direction may be sufficient. In any case, the battery pack 5 can be easily attached and detached by adopting a configuration in which the battery pack 5 is slid along the connection surface on the main body side. However, a configuration other than the configuration in which the battery pack 5 is slidably mounted may be used, and the battery pack 5 only needs to be tilted forward in the mounted state.

  Furthermore, although the structure which employ | adopted the plate-shaped slider 4 was demonstrated, the structure of the slider 4 is arbitrary and may be comprised from the wire, for example. For example, the slider 4 may be configured by bending or curving a wire into a predetermined shape, and a virtual cutting reference surface or installation surface may be formed. In this way, it is effective to form the escape portion 45 at the rear end portion of the slider 4 made of wire.

  Although the lawn mower (lawn clipper) has been described in the above embodiment, a hedge clipper (hedge trimmer) may be used. Moreover, although suitable for these gardening shearing electric tools, other electric tools may be used.

DESCRIPTION OF SYMBOLS 1 Tool main body 2 Shear blade 2a Guide 3 Main body housing 4 Slider 5 Battery pack 5a Bottom 6 Drive motor 6a Main shaft 7 Drive transmission part 8a Switch main body 8b Trigger 8c Spindle 9 Wire guard 10 Head part 10a Top part 11 Handle part 11a Upper surface 11b Lower surface 11c Lowermost part 12 Support arm part 12a Slider attachment part 13 Battery attachment part 13a Lowermost part 20 Reference mounting surface (main body side connection surface)
21 Horizontal wall portion 22 Lower wall portion 23 Rear end surface (main body side connection surface)
23a Upper end 24 of main body side connection surface Main body side terminal 25 Main body side slide rail 25a Convex strip 25b Concave groove 26 Locking concave portion 27 Introduction surface 40 Sliding surface 41 Main portion 42 Mounting piece portion 44 Pressing portion 45 Escape portion 46 Forked portion 47 Dial 50 Base surface (Pack side connection surface)
51 Upper part 51a Upper surface (pack side connection surface)
52 inclined surface 53 peak portion 53a peak portion 54 pack side terminal 55 pack side slide rail 55a ridge 55b groove 46 lock claw 57 lock release button 58 battery housing portion 59 battery 60 pack housing 61 movable member P mounting direction Q removal direction

Claims (3)

A hand-held rechargeable electric tool provided with a battery attachment part for detachably attaching a rechargeable battery pack to the rear end of the tool body,
The battery mounting portion has a main body side connection surface that is inclined so that the upper part is the front side and the lower part is the rear side, and the battery pack is attached by sliding along the main body side connection surface,
The tool body includes a head portion having a drive portion, a handle portion extending rearward from the upper portion of the head portion, and a rear end portion of the handle portion extending while gradually tilting upward from the lower portion of the head portion toward the rear. A connecting support arm part,
The battery mounting portion protrudes downward by a predetermined amount from the rear end portion of the support arm portion,
The battery pack is configured to be slid and mounted downward, and in the mounted state, the lower end portion of the battery pack protrudes downward by a predetermined amount from the connection surface on the main body side, and is higher than the lower end portion of the battery mounting portion Hand-held rechargeable power tool characterized by being in position . The handheld rechargeable electric tool according to claim 1 , wherein the handheld rechargeable electric tool is gradually lowered from the upper surface of the handle portion toward the main body side connection surface of the battery mounting portion. The rechargeable electric tool is a rechargeable lawn mower, and includes a slider at the bottom of the tool body, the slider extending rearward to the position of the battery mounting portion, and the battery mounting portion at the rear end of the slider. Or the escape part for avoiding interference with a battery pack is formed, The hand-held rechargeable electric tool of Claim 1 or 2 .

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