An optical module includes a housing, an optical component, and a power supply component. The housing has a first socket and a second socket. The optical component includes a first optical connector, an optical-to-electrical conversion component, and a second optical connector that are sequentially connected. The power supply component includes a first electrical connector, a power supply line, and a second electrical connector that are sequentially connected. The optical-to-electrical conversion component and the power supply line are both located in the housing, the first optical connector is located in the first socket, the first electrical connector is located at the first socket, and the second optical connector and the second electrical connector are both located in the second socket.

A switch assembly, which is part of a chain of switch assemblies, includes a communication unit (CU) configured to receive, from an external controller, a fire command to activate a detonator, a voltage measuring unit configured to locally measure a voltage (V) at the switch assembly after receiving the fire command to activate the detonator, a computing core (CC) configured to locally make a decision whether or not to activate the detonator, after receiving the fire command to activate the detonator and after measuring the voltage (V), based on whether or not the measured voltage (V) at the switch assembly is larger than a threshold value.

A flat plug-in connector assembly includes a flat contact, a mating plug connector, and a contact chamber. The flat contact has a middle strip having opposite first and second sides and further has a first end that forms a blade contact section. The mating plug connector includes a pair of contact springs for accommodating the blade contact section. The flat contact further includes first and second spring arms for damping relative movements between the blade contact section and the contact springs. The first and second spring arms are integrally formed in one piece at the first and second sides of the flat contact. The first and second spring arms have first and second free end sections in a form of first and second detent hooks. The flat contact is inserted in the contact chamber with the first and second detent hooks being displaceable supported in the contact chamber.

A terminal includes a first connection section having a first connection central axis extending centrally though the first connection section along a longitudinal direction and a shoulder having a first surface extending normal to the longitudinal direction at an end of the first connection section. The shoulder has a width greater than the first connection section in a width direction perpendicular to the longitudinal direction and has a shoulder central axis extending centrally though the shoulder along the longitudinal direction. The shoulder central axis is offset from the first connection central axis in the width direction.

A terminal includes a first connection section having a first connection central axis extending centrally though the first connection section along a longitudinal direction and a shoulder having a first surface extending normal to the longitudinal direction at an end of the first connection section. The shoulder has a width greater than the first connection section in a width direction perpendicular to the longitudinal direction and has a shoulder central axis extending centrally though the shoulder along the longitudinal direction. The shoulder central axis is offset from the first connection central axis in the width direction.

A reversible dual-position electrical connector includes an insulation seat, two rows of terminals, and two snaps. The insulation seat is provided with a base seat and a tongue. The two rows of terminals include two pairs of grounding terminals and two pairs of power terminals. The two pairs of ground terminals are provided with two pairs of vertically aligned grounding contacts. The two pairs of power terminals are provided with two pairs of vertically aligned power contacts. The two snaps are fixedly disposed at left and right sides of the tongue, respectively. Particularly, the two snaps are respectively formed at two metal plate sheets. The grounding contacts of each pair of the ground terminals are stacked longitudinally on the top and bottom surfaces of the respective metal plate sheet.

A reversible dual-position electrical connector includes an insulation seat, two rows of terminals, and two snaps. The insulation seat is provided with a base seat and a tongue. The two rows of terminals include two pairs of grounding terminals and two pairs of power terminals. The two pairs of ground terminals are provided with two pairs of vertically aligned grounding contacts. The two pairs of power terminals are provided with two pairs of vertically aligned power contacts. The two snaps are fixedly disposed at left and right sides of the tongue, respectively. Particularly, the two snaps are respectively formed at two metal plate sheets. The grounding contacts of each pair of the ground terminals are stacked longitudinally on the top and bottom surfaces of the respective metal plate sheet.

A battery pack assembly includes at least one battery cell and a terminal connector mechanism. The at least one battery cell has at least one terminal which includes a terminal engagement portion. The terminal connector mechanism has a retention member and a biasing member. The retention member has retention portion and is configured to move between an engaged position and a disengaged position. The biasing member is positioned between the housing and the retention member to bias the retention member towards the engaged position. In the engaged position, the retention portion of the retention member engages with the terminal engagement portion to inhibit movement of the terminal connector mechanism. In the disengaged position, the retention portion of the retention member is disengaged from the terminal engagement portion to permit movement of the terminal connector mechanism.

A battery pack assembly includes at least one battery cell and a terminal connector mechanism. The at least one battery cell has at least one terminal which includes a terminal engagement portion. The terminal connector mechanism has a retention member and a biasing member. The retention member has retention portion and is configured to move between an engaged position and a disengaged position. The biasing member is positioned between the housing and the retention member to bias the retention member towards the engaged position. In the engaged position, the retention portion of the retention member engages with the terminal engagement portion to inhibit movement of the terminal connector mechanism. In the disengaged position, the retention portion of the retention member is disengaged from the terminal engagement portion to permit movement of the terminal connector mechanism.

An electrical connector includes an insulating seat and at least one conductive terminal provided therein. The insulating seat includes a rear wall and two side walls, surroundingly forming a mating space. Each side wall includes an extending arm and an elastic arm. The elastic arm has a first arm extending forward from the extending arm and a second arm bending reversely from the first arm and extending backward. The second arm is connected to the rear wall. An opening slot is formed between the first arm and the extending arm and runs forward therethrough. A through slot is formed between the second arm and the first arm. A buckling portion is formed at a side of the second arm away from the first arm to correspond to the through slot and the opening slot in a left-right direction. The conductive terminal has a contact portion exposed to the mating space.