A connector 1 includes: a connector housing 10 that includes a housing main body 10A that can be fitted to a mating connector 60, and a CPA holding portion 21 that is disposed on an outer surface of the housing main body 10A; a CPA member 40 that is attached to the CPA holding portion 21, and that can be moved from a standby position to a fitting assurance position when the housing main body 10A is in a fitting complete position relative to the mating connector 60; and a two-dimensional code 50 that is disposed on the outer surface of the housing main body 10A. A part of the two-dimensional code 50 is covered by the CPA member 40 when the CPA member 40 is in the standby position, and the entire two-dimensional code 50 is exposed when the CPA member 40 is in the fitting assurance position.

A connector 1 includes: a connector housing 10 that includes a housing main body 10A that can be fitted to a mating connector 60, and a CPA holding portion 21 that is disposed on an outer surface of the housing main body 10A; a CPA member 40 that is attached to the CPA holding portion 21, and that can be moved from a standby position to a fitting assurance position when the housing main body 10A is in a fitting complete position relative to the mating connector 60; and a two-dimensional code 50 that is disposed on the outer surface of the housing main body 10A. A part of the two-dimensional code 50 is covered by the CPA member 40 when the CPA member 40 is in the standby position, and the entire two-dimensional code 50 is exposed when the CPA member 40 is in the fitting assurance position.

The detecting member includes deflectable and deformable resilient portions and the second housing includes an interfering portion for interfering with the resilient portions. The resilient portions have a deflected state attained by interfering with the interfering portion to be deflected and deformed, a returned state attained by being displaced in a return direction from the deflected state and a transition state for transitioning from the deflected state to the returned state. The interfering portion is provided with detection guiding portions. The detection guiding portions guide the detecting member to the detection position by sliding in contact with the resilient portions by a resilient restoring force of the resilient portions in the transition state of the resilient portions.

An electrical plug connector includes a plug connector housing, a locking member and a blocking member. The locking member is movable between a locking position and an unlocking position. In the locking position, the locking member is configured to prevent the plug connection from releasing and, in the unlocking position, the locking member is configured to allow it to be released. The blocking member is displaceable between a starting position and a blocking position. In the blocking position, the blocking member is configured to prevent the locking member from assuming the unlocking position. The blocking member is configured to strike a mating plug connector housing by shifting the plug connector housing relative to the mating plug connector housing, in such a way that the mating plug connector housing displaces the blocking member from the starting position into the blocking position counter to the plugging direction.

An electrical plug connector includes a plug connector housing, a locking member and a blocking member. The locking member is movable between a locking position and an unlocking position. In the locking position, the locking member is configured to prevent the plug connection from releasing and, in the unlocking position, the locking member is configured to allow it to be released. The blocking member is displaceable between a starting position and a blocking position. In the blocking position, the blocking member is configured to prevent the locking member from assuming the unlocking position. The blocking member is configured to strike a mating plug connector housing by shifting the plug connector housing relative to the mating plug connector housing, in such a way that the mating plug connector housing displaces the blocking member from the starting position into the blocking position counter to the plugging direction.

An electrical mating system can include a first connector having a plurality of first contacts, and a second connector having a plurality of second contacts. Each one of the first contacts can pair with one of the second contacts so that they provide electrical conduction between pairs of contacts when the first connector is properly mated to the second connector. At least one of the first contacts or first connector and/or one of the second contacts and the second connector can be sized and configured such that an open circuit occurs across a specific one of the pairs of contacts when the first connector is improperly mated to the second connector.

A connector includes a housing fitted into or detached from a mating housing, and a fitting detection member assembled to a member housing section of the housing and detecting a fitting completion. The fitting detection member includes a locked portion locked to or detached from a lock section of a flexible lock arm, and a flexible arm section provided with a slip-off prevention locking section locked to or detached from a locking protrusion of the member housing section, and when fitting of both the housings is released, the flexible arm section is bent and deformed in a direction in which a locking margin between the locking protrusion of the member housing section and the slip-off prevention locking section of the flexible arm section increases.

An electrical connector includes a connector shell, a coupling nut, and an indicator surrounding the connector shell. The indicator includes a clamp member and a check member. The clamp member includes a ring and a coupling structure extending from the ring to the check member and coupling the ring to the check member. The indicator may assist a user in determining if the electrical connector is in a fully-mated state.

An electrical connector includes a connector shell, a coupling nut, and an indicator surrounding the connector shell. The indicator includes a clamp member and a check member. The clamp member includes a ring and a coupling structure extending from the ring to the check member and coupling the ring to the check member. The indicator may assist a user in determining if the electrical connector is in a fully-mated state.

A position assurance apparatus, which is used for a connector assembly connected to a signal circuit are provided. The connector assembly comprises a first connector and a second connector, which are connected in pairs, wherein the first connector is connected to the signal circuit, and the second connector is inserted in the first connector. The position assurance apparatus comprises a first connecting portion and a second connecting portion, which are electrically connected to each other. The first connecting portion and the second connecting portion are configured to be electrically connected to the signal circuit by means of the first connector, so as to turn on the signal circuit when the first connector and the second connector are inserted in place.