A hand-held rotary power tool includes a housing that provides a manual grip zone that is grasped by the user during operation of the tool. The housing includes a switch opening that overlies an electrical switch that controls operation of a tool motor. The tool includes a switch actuator that is disposed in tool housing so as to be accessible to a user of the tool via the switch opening and is operable to control the position of the switch. The switch actuator is configured to damp tool noise and transmission of tool vibration to the tool housing.

Proposed is a key switch haying a collapsible balance frame, comprising: a base, a movable plate, a balance frame, a transmission member and a key cap, wherein the movable plate is installed on the base and moves left and right along the base, wherein the balance frame is provided over the movable plate, wherein the balance frame comprises a first bracket and a second bracket arranged on a first side and a second side of the balance frame, respectively, wherein a lower end of the first bracket is connected to the movable plate, and a lower end of the second bracket is connected to the base, wherein a return spring is arranged horizontally, first and second ends of the return spring are (i) respectively connected to the first and the second brackets or (ii) respectively connected to the key cap and any one of the first bracket and the second bracket.

Proposed is a key switch haying a collapsible balance frame, comprising: a base, a movable plate, a balance frame, a transmission member and a key cap, wherein the movable plate is installed on the base and moves left and right along the base, wherein the balance frame is provided over the movable plate, wherein the balance frame comprises a first bracket and a second bracket arranged on a first side and a second side of the balance frame, respectively, wherein a lower end of the first bracket is connected to the movable plate, and a lower end of the second bracket is connected to the base, wherein a return spring is arranged horizontally, first and second ends of the return spring are (i) respectively connected to the first and the second brackets or (ii) respectively connected to the key cap and any one of the first bracket and the second bracket.

When an operation knob 10 formed of silicone rubber is pushed laterally, a stem 7 tilts with a contact portion (i) as a fulcrum, a push button portion 6b is pushed, and a contact point in a switch mechanism portion 6a operates to turn on a switch circuit. Even if, by a large operating force F3 being applied, the operation knob 10 is extended and the inner surface portion 15, which is a ceiling surface of an internal space 13 of the operation knob 10, rides on an upper end portion 7c, a reinforcing surface 19 provided on the inner surface portion 15 slides on the upper end portion 7c, and the operation knob 10 returns to the initial shape.

When an operation knob 10 formed of silicone rubber is pushed laterally, a stem 7 tilts with a contact portion (i) as a fulcrum, a push button portion 6b is pushed, and a contact point in a switch mechanism portion 6a operates to turn on a switch circuit. Even if, by a large operating force F3 being applied, the operation knob 10 is extended and the inner surface portion 15, which is a ceiling surface of an internal space 13 of the operation knob 10, rides on an upper end portion 7c, a reinforcing surface 19 provided on the inner surface portion 15 slides on the upper end portion 7c, and the operation knob 10 returns to the initial shape.

A push switch contains a case including a housing space having an upper-opening and including fixed-contacts disposed on a bottom of the housing space, a movable contact member disposed in the housing space configured to deform in response to receiving pressure applied from above, and contacting the fixed-contacts upon defoming in response to the received pressure, and a pushing member disposed on the movable contact member and configured to transmit the received pressure to the movable contact member. The movable contact member includes a pair of first-linear edges, wherein the pushing member includes a plurality of projecting-pressing portions disposed on a bottom surface of the pushing member facing the movable contact member, and wherein the plurality of pressing portions is disposed on the bottom surface at positions not overlapping a straight-line that passes through a center of the movable contact member and intersecting each of the pair of first-linear edges.

A push switch contains a case including a housing space having an upper-opening and including fixed-contacts disposed on a bottom of the housing space, a movable contact member disposed in the housing space configured to deform in response to receiving pressure applied from above, and contacting the fixed-contacts upon defoming in response to the received pressure, and a pushing member disposed on the movable contact member and configured to transmit the received pressure to the movable contact member. The movable contact member includes a pair of first-linear edges, wherein the pushing member includes a plurality of projecting-pressing portions disposed on a bottom surface of the pushing member facing the movable contact member, and wherein the plurality of pressing portions is disposed on the bottom surface at positions not overlapping a straight-line that passes through a center of the movable contact member and intersecting each of the pair of first-linear edges.

For suppressing wobbling of a button while suppressing reactive force generated when the button is pressed, a hinge structure of a button includes a contact portion contacting a substrate on which the button is arranged, a button main body varying in a relative positional relationship with the substrate, a first hinge having flexibility, and being coupled to the button main body at one end and coupled to the contact portion at another end, and a second hinge having flexibility, and being coupled at one end to a position in the button main body on an opposite side on which the first hinge is coupled to the button main body, and coupled at another end to the first hinge at a position in the button main body on a side on which the first hinge is coupled.

For suppressing wobbling of a button while suppressing reactive force generated when the button is pressed, a hinge structure of a button includes a contact portion contacting a substrate on which the button is arranged, a button main body varying in a relative positional relationship with the substrate, a first hinge having flexibility, and being coupled to the button main body at one end and coupled to the contact portion at another end, and a second hinge having flexibility, and being coupled at one end to a position in the button main body on an opposite side on which the first hinge is coupled to the button main body, and coupled at another end to the first hinge at a position in the button main body on a side on which the first hinge is coupled.

An input apparatus includes a first operation section configured to receive a push operation, a second operation section configured to receive a push operation, a first pivot member configured to pivot, a second pivot member configured to pivot, a first switch, a second switch, and a power generation device. The power generation device is configured to generate electric power when the first pivot member pivots. When the first operation section is pushed, the first switch is turned ON and the first pivot member directly receives force from the first operation section to pivot. When the second operation section is pushed, the second switch is turned ON and the first pivot member indirectly receives force from the second operation section via the second pivot member to pivot.