Electric power tool

1. An electric power tool comprising:

a main body including a tubular tool body part with an output portion at one end, the tool body part having therein a motor for driving the output portion, and a grip portion extending from the tool body part in a direction intersecting an axial direction of the tool body part, the grip portion having an attachment section formed at a bottom end portion thereof; and

a battery pack having an attachment portion formed at an upper region of the battery pack to be detachably attached to the main body;

wherein the attachment section of the main body is provided with an engaged portion; and

wherein the attachment portion of the battery pack includes a locking portion for interlocking with the engaged portion when the engaged portion is inserted under the locking portion; and an engaging portion for engaging with the engaged portion interlocked with the locking portion to thereby prevent the engaged portion from being moved away from the locking portion; and

wherein the battery pack is provided with, at a side region thereof, with an operating portion for releasing the engagement of the engaging portion with the engaged portion to thereby allow the engaged portion to be moved away from the locking portion.

2. The electric power tool of claim 1 , wherein a manipulation member having the operating portion is disposed at the side region of the battery pack; a coupling member having the engaging portion is arranged at the upper region of the battery pack in such a manner as to allow the engaging portion to move in an upward-downward direction; and a motion conversion part for converting a push-in motion of the operating portion toward an inside of the battery pack to a descending motion of the engaging portion for disengagement from the engaged portion is provided between the manipulation member and the coupling member.

3. The electric power tool of claim 2 , wherein the coupling member is arranged such that a base end and a leading end of the coupling member are positioned at a front side and a rear side of the battery pack, respectively, and the engaging portion is disposed at the leading end of the coupling member.

4. The electric power tool of claim 2 , wherein the manipulation member is pivotally supported at the side region of the battery pack, the coupling member is pivotally supported at the upper region of the battery pack, and the motion conversion part includes a pushed portion provided at the base end of the coupling member and a pushing portion provided at a top end of the manipulation member for pushing the pushed portion in an upward direction.

5. The electric power tool of claim 2 , wherein the coupling member is provided with a plurality of branch portions; the engaging portion is formed at the leading end of each of the branch portions of the coupling member, the engaging portions being arranged at opposite lateral sides of a top surface of the battery pack; and the engaged portion is provided at the main body to correspond to the engaging portions, the engaging portions being adapted to releasably engage with the corresponding engaged portions.

6. An electric power tool comprising:

a main body including a tubular tool body part with an output portion at one end, the tool body part having therein a motor for driving the output portion, and a grip portion extending from the tool body part in a direction intersecting an axial direction of the tool body part, the grip portion having an attachment section formed at a bottom end portion thereof; and

a battery pack detachably attached to the main body,

wherein the attachment section of the main body is provided with an engaged portion; and

wherein the battery pack is provided, at an upper region thereof, with an engaging portion for engaging with the engaged portion; and, at a side region thereof, with an operating portion for releasing the engagement of the engaging portion with the engaged portion; and

wherein a manipulation member having the operating portion is disposed at the side region of the battery pack, a coupling member having the engaging portion is arranged at the upper region of the battery pack in such a manner as to allow the engaging portion to move in an upward-downward direction, and a motion conversion part for converting a push-in motion of the operating portion toward an inside of the battery pack to a descending motion of the engaging portion for disengagement from the engaged portion is provided between the manipulation member and the coupling member; and

wherein the manipulation member is pivotally supported at the side region of the battery pack, the coupling member is pivotally supported at the upper region of the battery pack, and the motion conversion part includes a pushed portion provided at a base end of the coupling member and a pushing portion provided at a top end of the manipulation member for pushing the pushed portion in an upward direction.

7. An electric power tool comprising:

a main body including a tubular tool body part with an output portion at one end, the tool body part having therein a motor for driving the output portion, and a grip portion extending from the tool body part in a direction intersecting an axial direction of the tool body part, the grip portion having an attachment section formed at a bottom end portion thereof; and

a battery pack detachably attached to the main body,

wherein the attachment section of the main body is provided with an engaged portion; and

wherein the battery pack is provided, at an upper region thereof, with an engaging portion for engaging with the engaged portion; and, at a side region thereof, with an operating portion for releasing the engagement of the engaging portion with the engaged portion; and

wherein a manipulation member having the operating portion is disposed at the side region of the battery pack, a coupling member having the engaging portion is arranged at the upper region of the battery pack in such a manner as to allow the engaging portion to move in an upward-downward direction, and a motion conversion part for converting a push-in motion of the operating portion toward an inside of the battery pack to a descending motion of the engaging portion for disengagement from the engaged portion is provided between the manipulation member and the coupling member; and

wherein the coupling member is provided with a plurality of branch portions; the engaging portion is formed at an leading end of each of the branch portions of the coupling member, the engaging portions being arranged at opposite lateral sides of a top surface of the battery pack; and the engaged portion is provided at the main body to correspond to the engaging portions, the engaging portions being adapted to releasably engage with the corresponding engaged portions.

8. An electric power tool comprising:

a main body including a tubular tool body part with an output portion at one end, the tool body part having therein a motor for driving the output portion, and a grip portion extending from the tool body part in a direction intersecting an axial direction of the tool body part, the grip portion having an attachment section formed at a bottom end portion thereof; and

a battery pack detachably attached to the main body,

wherein the attachment section of the main body is provided with an engaged portion; and

wherein the battery pack is provided, at an upper region thereof, with an engaging portion for engaging with the engaged portion; and, at a side region thereof, with an operating portion for releasing the engagement of the engaging portion with the engaged portion; and wherein a manipulation member having the operating portion is disposed at the side region of the battery pack; a coupling member having the engaging portion is arranged at the upper region of the battery pack in such a manner as to allow the engaging portion to move in an upward-downward direction; and a motion conversion part for converting a push-in motion of the operating portion toward an inside of the battery pack to a descending motion of the engaging portion for disengagement from the engaged portion is provided between the manipulation member and the coupling member; and

wherein the coupling member is arranged such that a base end and a leading end of the coupling member are positioned at a front side and a rear side of the battery pack, and the engaging portion is disposed at the leading end of the coupling member.

9. The electric power tool of claim 8 , wherein the manipulation member is pivotally supported at the side region of the battery pack, the coupling member is pivotally supported at the upper region of the battery pack, and the motion conversion part includes a pushed portion provided at a base end of the coupling member and a pushing portion provided at a top end of the manipulation member for pushing the pushed portion in an upward direction.