Power tool and impact driver
A power tool includes: a motor having a rotor, which rotates about a motor rotational axis extending in a front-rear direction; an output part, which is disposed more forward than the motor and is rotated in response to rotation of the rotor; a housing including: a motor-housing part, which houses the motor; a grip part, which extends downward from the motor-housing part; a battery-holding part, which is connected to a lower-end portion of the grip part; a control circuit board, which is housed in the housing; and an operation-and-display part, which is disposed at a rear portion of the housing and is electrically connected to the control circuit board.
1. A power screw-tightening tool comprising:
a motor including a rotor configured to rotate about a motor rotational axis extending in a front-rear direction;
a plurality of gears disposed more forward than the rotor and configured to be rotated in response to rotation of the motor;
an output part disposed more forward than the plurality of gears and configured to be rotated in response to rotation of the plurality of gears;
a housing including: a motor-housing part, which houses the motor; a grip part, which extends downward from the motor-housing part; and a battery-holding part, which is connected to a lower-end portion of the grip part;
a first circuit board, which is housed in the housing; and
an operation-and-display part disposed at a rear portion of the battery-holding part and electrically connected to the first circuit board by a lead wire, the operation-and-display part including:
a second circuit board;
at least one switch device mounted on the second circuit board and configured to be manipulated by a user to select an application mode of the motor; and
at least one light emitting device mounted on the second circuit board and configured to display the application mode selected by the user.
2. The power screw-tightening tool according to claim 1 , wherein the operation-and-display part is disposed in a recessed part provided on the battery-holding part.
3. The power screw-tightening tool according to claim 1 , wherein the center of the operation-and-display part and the center of the battery-holding part coincide in a left-right direction of the power tool.
4. The power screw-tightening tool according to claim 1 , wherein the operation-and-display part has a larger dimension in a left-right direction of the power tool, which is perpendicular to the front-rear direction, than the dimension of the operation-and-display part in an up-down direction of the power tool, the up-down direction being perpendicular to the left-right direction and to the front-rear direction.
5. The power screw-tightening tool according to claim 1 , wherein the operation-and-display part is disposed more rearward than a rear-end part of the grip part.
6. The power screw-tightening tool according to claim 1 , wherein the operation-and-display part is disposed more rearward than a rear-end part of the motor-housing part.
7. The power screw-tightening tool according to claim 1 , wherein the first circuit board is housed in the battery-holding part.
8. The power screw-tightening tool according to claim 7 , wherein a rear-end part of the first circuit board is disposed more rearward than a rear-end part of the grip part.
9. The power screw-tightening tool according to claim 7 , wherein the operation-and-display part is disposed more rearward than the first circuit board.
10. The power screw-tightening tool according to claim 1 , wherein a surface of the operation-and-display part tilts downward as it goes rearward.
11. The power screw-tightening tool according to claim 1 , wherein;
the operation-and-display part further comprises: a spacer member, which supports the second circuit board; and a label member, which covers the at least one switch device and the at least one light-emitting device; and
the at least one switch device is manipulatable via the label member.
12. The power screw-tightening tool according to claim 11 , wherein the second circuit board is fixed to at least a portion of the housing via the spacer member.
13. The power screw-tightening tool according to claim 11 , wherein a surface of the second circuit board tilts downward as it goes rearward.
14. The power screw-tightening tool according to claim 1 , wherein the first circuit board comprises:
a storage part, which stores software for executing a plurality of application modes of the motor;
an instruction-output part configured to output a mode instruction that sets the application mode in response to manipulation of the at least one switch device of the operation-and-display part;
a motor-control part configured to control the motor based on the mode instruction; and
a display-control part configured to control a display part of the operation-and-display part based on the mode instruction.
15. The power screw-tightening tool according to claim 1 , wherein, in the front-rear direction, a first distance between a front-end part of a lower-end portion of the grip part and a front-end part of the battery-holding part is shorter than or equal to a second distance between a rear-end part of a lower-end portion of the grip part and a rear-end part of the battery-holding part.
16. The power screw-tightening tool according to claim 1 , further comprising:
a battery-mounting part disposed at a lower portion of the battery-holding part; and
a battery pack mounted on the battery-mounting part and being mountable from forward of the battery-holding part.
17. The power screw-tightening tool according to claim 1 , wherein:
the first circuit board is configured to drive the motor according to the user-selected application mode; and
the user-selected application mode is one of:
an impact-force mode consisting of a MAX mode, a HARD mode, a MEDIUM mode and a SOFT mode; or
a dedicated mode consisting of a WOOD mode, a self-drilling screw mode and a BOLT mode.
18. A power tool comprising:
a motor including a rotor configured to rotate about a motor rotational axis extending in a front-rear direction;
an output part disposed more forward than the motor and configured to be rotated in response to rotation of the rotor;
a housing including: a motor-housing part, which houses the motor; a grip part, which extends downward from the motor-housing part; and a battery-holding part, which is connected to a lower-end portion of the grip part;
a first circuit board disposed in the housing and configured to control operation of the motor; and
an operation-and-display part disposed at a rear portion of the battery-holding part and electrically connected to the first circuit board by a lead wire, the operation-and-display part including: a second circuit board; at least one switch device mounted on the second circuit board and configured to be manipulated by a user to select an application mode of the motor; and at least one light emitting device mounted on the second circuit board and configured to display the application mode selected by the user;
wherein:
in the front-rear direction, a first distance between a front-end part of a lower-end portion of the grip part and a front-end part of the battery-holding part is shorter than or equal to a second distance between a rear-end part of a lower-end portion of the grip part and a rear-end part of the battery-holding part.
19. The power tool according to claim 18 , wherein:
the first distance is between a frontmost point of a frontmost, lowermost edge of the grip part and a frontmost point of the battery-holding part, and
the second distance is between a rearmost point of a rearmost, lowermost edge of the grip part and a rearmost point of the battery-holding part.
20. An impact tool comprising:
a motor including a rotor configured to rotate about a motor rotational axis extending in a front-rear direction;
a plurality of gears disposed more forward than the rotor in the front-rear direction and configured to be rotated in response to rotation of the rotor;
an anvil disposed more forward than the plurality of gears in the front-rear direction and configured to be rotated in response to rotation of the plurality of gears;
a housing including: a motor-housing part, which houses the motor; a grip part, which extends downward from the motor-housing part; and a battery-holding part, which is connected to a lower-end portion of the grip part;
a first circuit board housed in the battery holding part and configured to control the motor; and
an operation-and-display part including:
a second circuit board;
at least one switch device mounted on the second circuit board and configured to be manipulated by a user to select an application mode of the motor; and
at least one light emitting device mounted on the second circuit board and configured to display the application mode selected by the user,
wherein:
the operation-and-display part is disposed at a rear portion of the battery-holding part and is electrically connected to the first circuit board by a lead wire,
the first circuit board extends in a first plane,
the second circuit board extends in a second plane, and
the first and second planes are oblique to each other.