Provided herein are coil support structures and methods of retaining a printed circuit board assembly (PCBA) of a relay. In some embodiments, a bi-stable relay assembly may include a coil support structure, having a central section extending between a first end section and a second end section, and set of biasable fasteners extending from the first end section and the second end section, wherein each of the set of biasable fasteners includes a sloped engagement surface and a retention slot. The coil support structure may further include a PCBA coupled to the first and second end sections of the coil support structure, wherein the coil support structure extends within the retention slot of each of the set of biasable fasteners.

The present disclosure envisages an electromagnetic drive unit. The drive unit comprises a magnet having a north pole surface, a south pole surface, an operative top surface and an operative bottom surface. A coil having a pair of terminals is assembled on the magnet and hingeably coupled to the magnet, wherein a hingeable movement of the coil with respect to the magnet provides a reciprocating mechanical drive to the magnet. The hingeable movement of the coil is facilitated by providing an alternating supply to the pair of terminals of the coil. A hinge is provided on a base supporting the magnet for facilitating the pivotal movement of coil with respect to the magnet. A resilient band is provided adjacent the operative top surface of the magnet for securing the coil to the magnet.

The present disclosure envisages an electromagnetic drive unit. The drive unit comprises a magnet having a north pole surface, a south pole surface, an operative top surface and an operative bottom surface. A coil having a pair of terminals is assembled on the magnet and hingeably coupled to the magnet, wherein a hingeable movement of the coil with respect to the magnet provides a reciprocating mechanical drive to the magnet. The hingeable movement of the coil is facilitated by providing an alternating supply to the pair of terminals of the coil. A hinge is provided on a base supporting the magnet for facilitating the pivotal movement of coil with respect to the magnet. A resilient band is provided adjacent the operative top surface of the magnet for securing the coil to the magnet.

A high voltage relay resistant to instantaneous high-current impact is disclosed, and includes an electromagnet system, a control system, a contact system, and a base support. In the present solution, an electromagnetic force generated by the contact system is used to resolve a problem of contact separation caused by an electric repulsion force generated by an instantaneous high-current.

An electromagnetic relay includes a case, a first fixed terminal including a first fixed contact, a second fixed terminal including a second fixed contact, a movable contact piece including first and second movable contacts, a first magnet, a gas flow path, and a partition member. The case includes an accommodation space and a side wall covering the accommodation space in a first direction. The accommodation space includes a first space where the first fixed contact is disposed and a second space where the second fixed contact is disposed. The first magnet configured to extend a first arc generated between the first fixed contact and the first movable contact in the first direction. The gas flow path is disposed between the side wall and the movable contact piece. The gas flow path includes an inlet communicating with the first space and an outlet communicating with the second space.

A contact apparatus includes a fixed contact and a moving contact component. The moving contact component includes a push rod, a contact bracket, an insulated sleeve, a moving contact, and a contact spring. The insulated sleeve is fixedly sleeved on a first end of the push rod, a second end of the push rod is configured to connect a drive apparatus, the contact bracket is fixedly sleeved on the insulated sleeve, the moving contact and the contact spring are both flexibly sleeved on the insulated sleeve, the contact spring elastically abuts between the moving contact and the contact bracket, the moving contact and the fixed contact are disposed relative to each other in an extension direction of the push rod, and the moving contact can be driven by the push rod to be connected to the fixed contact.

A switching device includes: a header, a first magnet and a second magnet, a first magnetic sensing element and a second magnetic sensing element, a first inductor and a second inductor, a printed circuit board including an upper face on which are mounted upfront the first magnetic sensing element and the second magnetic sensing element and a lower face on which are mounted upfront the first inductor and the second inductor, a first microcontroller unit and a second microcontroller unit, wherein the first microcontroller unit and the second microcontroller unit are configured to send a stimulus signal respectively to the second conductor and to the first conductor, wherein the first microcontroller unit is configured to read a response produced by the first magnetic sensing element, the response corresponding to a magnetic field produced by the first inductor having received the stimulus signal sent by the second microcontroller unit, wherein the second microcontroller unit is configured to read a response produced by the second magnetic sensing element, the response corresponding to a magnetic field produced by the second inductor having received the stimulus signal sent by the first microcontroller unit, wherein the first microcontroller unit and the second microcontroller unit are configured to determine a state of the switching device based on the read responses.

A switching device includes: a header, a first magnet and a second magnet, a first magnetic sensing element and a second magnetic sensing element, a first inductor and a second inductor, a printed circuit board including an upper face on which are mounted upfront the first magnetic sensing element and the second magnetic sensing element and a lower face on which are mounted upfront the first inductor and the second inductor, a first microcontroller unit and a second microcontroller unit, wherein the first microcontroller unit and the second microcontroller unit are configured to send a stimulus signal respectively to the second conductor and to the first conductor, wherein the first microcontroller unit is configured to read a response produced by the first magnetic sensing element, the response corresponding to a magnetic field produced by the first inductor having received the stimulus signal sent by the second microcontroller unit, wherein the second microcontroller unit is configured to read a response produced by the second magnetic sensing element, the response corresponding to a magnetic field produced by the second inductor having received the stimulus signal sent by the first microcontroller unit, wherein the first microcontroller unit and the second microcontroller unit are configured to determine a state of the switching device based on the read responses.

A high-durability electrical contact structure may include a first contact and a second contact disposed to face each other while being spaced apart a predetermined distance from each other. A portion of the second contact includes a magnetic material. Damage to the surfaces of an arcing electrical contact according to arc generation positions between contacts is minimized, increasing the life of the arcing electrical contact.

A high-durability electrical contact structure may include a first contact and a second contact disposed to face each other while being spaced apart a predetermined distance from each other. A portion of the second contact includes a magnetic material. Damage to the surfaces of an arcing electrical contact according to arc generation positions between contacts is minimized, increasing the life of the arcing electrical contact.