A switch includes: a tank; a fixed contact and a reciprocally movable contact provided inside the tank; an opening/closing shaft that rotates to thereby move the movable contact; a jack base fixed to the outer side of the tank; a torsion bar that stores a force to rotate the opening/closing shaft so as to move the movable contact in a direction away from the fixed contact; and an opening/closing lever detachably attached to the opening/closing shaft. The jack base has a first penetrating portion formed therethrough and facing the opening/closing lever. The opening/closing lever has a second penetrating portion formed therethrough and facing the jack base. The switch further includes: a bolt inserted through the first penetrating portion and the second penetrating portion; and a nut attached to a portion of the bolt, the portion of the bolt extending out of the first penetrating portion and the second penetrating portion.

A removable circuit card assembly configured to be inserted into an HVAC device is provided. The removable circuit card assembly includes a printed wiring board, an enclosure cap coupled to the printed wiring board, and a dual in-line package (DIP) switch component coupled to the printed wiring board. The DIP switch component includes multiple DIP switches. Each of the DIP switches is configured to be actuated between a first position and a second position.

The invention provides an electronic device, a PCB and an electric tool; comprises a main body, a first electric connecting part, a variable resistor, a speed regulating contact, a reversing electric connecting part, a reversing contact, a speed regulating handle and a reversing handle, the first electric connecting part is fixedly connected with the main body, and one end of the first electric connecting part is exposed out of the main body; one end of the speed regulating handle is of a cylindrical structure, the end part of the speed regulating handle is provided with an opening, one end of the main body is provided with a column, the opening end of the speed regulating handle is movably sleeved on the column through an elastic piece and forms a first space with the main body; the speed regulating contact and the variable resistor are arranged in the first space.

The invention provides an electronic device, a PCB and an electric tool; comprises a main body, a first electric connecting part, a variable resistor, a speed regulating contact, a reversing electric connecting part, a reversing contact, a speed regulating handle and a reversing handle, the first electric connecting part is fixedly connected with the main body, and one end of the first electric connecting part is exposed out of the main body; one end of the speed regulating handle is of a cylindrical structure, the end part of the speed regulating handle is provided with an opening, one end of the main body is provided with a column, the opening end of the speed regulating handle is movably sleeved on the column through an elastic piece and forms a first space with the main body; the speed regulating contact and the variable resistor are arranged in the first space.

Disclosed embodiments relate to a socket. A speed-control switch, including: a housing including a top plate provided with a central opening extending in a length direction; a push rod at least partially contained in the housing, and a first end of the push rod protruding out of the housing from the central opening and capable of sliding in the central opening; a plurality of connection terminals provided in pairs in the housing and configured to: selectively engage with a second end of the push rod opposite to the first end to limit a plurality of speed indications of the speed-control switch; and a speed selection assembly with a part thereof set on the top plate and configured to allow a selection for a plurality of speed indications of the speed-control switch as the push rod slides in the central opening. The speed-control switch can achieve speed switching with a small force. The speed-control switch is suitable for high-power electrical appliances, requires a small number of components, reducing manufacturing costs and assembly time and assembly difficulty.

Disclosed embodiments relate to a socket. A speed-control switch, including: a housing including a top plate provided with a central opening extending in a length direction; a push rod at least partially contained in the housing, and a first end of the push rod protruding out of the housing from the central opening and capable of sliding in the central opening; a plurality of connection terminals provided in pairs in the housing and configured to: selectively engage with a second end of the push rod opposite to the first end to limit a plurality of speed indications of the speed-control switch; and a speed selection assembly with a part thereof set on the top plate and configured to allow a selection for a plurality of speed indications of the speed-control switch as the push rod slides in the central opening. The speed-control switch achieve speed switching with a small force. The speed-control switch is suitable for high-power electrical appliances, requires a small number of components, reducing manufacturing costs and assembly time and assembly difficulty.

Provided is an electric switch, including a casing, an actuator, a movable contact frame, a snap-action resilient member, a lock mechanism, a signal switch and a contact switch. The actuator is capable of reciprocating along a first direction. The movable contact frame is provided with a retaining portion. The snap-action resilient member is arranged in the movable contact frame and is compressed by the actuator when the actuator moves. The lock mechanism includes two lock members which are capable of reciprocating in the mounting cavity along a second direction with the movement of the actuator, so as to lock or unlock the retaining portion. A brush of the electric switch is arranged on the movable contact frame. A movable contact of the contact switch is arranged on the movable contact frame.

A static mitigation end cap for an architectural covering is provided. The covering may include a head rail having an end cap. The end cap may include a housing extending along a longitudinal length of the head rail and defining a chamber. The end cap may include a printed circuit board received within the chamber and configured to control a motor assembly operatively connected to the at least one end cap. The end cap may include an actuation member slidably coupled with the end cap for selective engagement with the printed circuit board.

A switch includes: a tank; a fixed contact and a reciprocally movable contact provided inside the tank; an opening/closing shaft that rotates to thereby move the movable contact; a jack base fixed to the outer side of the tank; a torsion bar that stores a force to rotate the opening/closing shaft so as to move the movable contact in a direction away from the fixed contact; and an opening/closing lever detachably attached to the opening/closing shaft. The jack base has a first penetrating portion formed therethrough and facing the opening/closing lever. The opening/closing lever has a second penetrating portion formed therethrough and facing the jack base. The switch further includes: a bolt inserted through the first penetrating portion and the second penetrating portion; and a nut attached to a portion of the bolt, the portion of the bolt extending out of the first penetrating portion and the second penetrating portion.

The present disclosure relates to a DC-DC converter (10), comprising a first DC port (10A) connectable to a DC source (B), a second DC port (10B) with a positive terminal (PT), a midpoint terminal (MT) and a negative terminal (NT) connectable to a DC bus (4). A first capacitor (C1) is connected between the positive terminal (PT) and the midpoint terminal (MT) and a second capacitor (C2) is connected between the midpoint terminal (MT) and the negative terminal (NT). The DC-DC converter (10) comprises a first switching circuit (20), a second switching circuit (40) and a resonant circuit (30) connected between the first switching circuit (20) and the second switching circuit (40). The second switching circuit (40) comprises a first switch (Q1), a second switch (Q2), a third switch (Q3), and a fourth switch (Q4).