Connector with locking mechanism

A connector with a locking mechanism provided with a locking mechanism capable of engaging and disengaging with each other one first connector and another second connector, wherein:

• the first connector comprises
• a rectangular solid-shaped first housing having a recess portion where one face has an approximately rectangular-shaped opening, and
• one or more first contacts with a pin-shaped connecting terminal disposed at an inner portion of the recess portion, and
• the second connector comprises
• a rectangular solid-shaped second housing having at one end side a header portion which is fittable in the recess portion, and having at another end a flange portion which is partially abuttable with one face of the first housing, and
• a second contact disposed at an inner portion of the second housing and having at one end a bellows terminal which is connectable with the connecting terminal of the first contact, and wherein
• the first housing has a strip-shaped lock arm which is provided at a prescribed space from one inner wall of the recess portion and which projects from a bottom portion of the recess portion towards the open face of the recess portion and approximately parallel to the one inner wall of the recess portion, the lock arm being provided at its tip with a trapezoidal-shaped hook portion projecting towards a central portion of the recess portion, and
• the second housing has two or more quadrangular frustum-shaped engaging protrusions which are capable of engaging and disengaging with the hook portion, protruding from one face of the header portion, wherein the hook portion is located at a central portion of the first connector.