Printed circuit board spacer
AssigneeMilwaukee Electric Tool Corporation
InventorsMatthew J. Mergener, Daniel R. Ertl
Life of this patent
Estimating the term…
Abstract
A power tool and a printed circuit board assembly (“PCBA”) for the power tool. The PCBA includes, for example, a printed circuit board (“PCB”), a heat sink, a spacer between the PCB and the heat sink, and a gap pad. The PCB and the heat sink are fastened to one another via fasteners so the spacer absorbs excess forces torsional forces from torques applied to the fasteners. The gap pad is placed within an opening or recess of the spacer to contact one or more FETs on the PCB. In some embodiments, the PCBA includes a second heat sink or rigid member on the opposite side of the PCB than the spacer to further distribute excess torsional forces from torques applied to the fasteners.
Claims20
A power tool comprising:
- a motor;
- and
- a printed circuit board assembly (“PCBA”) electrically connected to the motor for powering the motor, the PCBA including
- a printed circuit board (“PCB”) including a switch,
- a heat sink operable to dissipate heat generated by the switch, the heat sink coupled to the PCB by one or more fasteners, and
- a spacer located between the PCB and the heat sink, the spacer operable to absorb torsional forces from torque applied to the one or more fasteners.
A printed circuit board assembly (“PCBA”) for a power tool including a motor, the PCBA comprising:
- a printed circuit board (“PCB”) including a switch;
- a heat sink operable to dissipate heat generated by the switch, the heat sink coupled to the PCB by one or more fasteners;
- and
- a spacer located between the PCB and the heat sink, the spacer operable to absorb torsional forces from torque applied to the one or more fasteners.
A printed circuit board assembly (“PCBA”) for a power tool including a motor, the PCBA comprising:
- a printed circuit board (“PCB”) including a switch;
- a heat sink operable to dissipate heat generated by the switch, the heat sink coupled to the PCB by one or more fasteners;
- a spacer located between the PCB and the heat sink, the spacer operable to absorb torsional forces from torque applied to the one or more fasteners;
- and
- a rigid member separated from the spacer by the PCB and located on an opposite side of the PCB than the spacer.
Dependencies are inferred from the claim text.