Plug connector, housing for plug connector, and manufacturing method of housing for plug connector

1 . A plug connector configured to be inserted in a host connector, the plug connector comprising:

a plurality of contact pins aligned in a predetermined direction; and

a housing configured to hold the plurality of contact pins,

wherein each of the contact pins extends in an intersecting direction that is a direction intersecting the predetermined direction,

wherein the housing includes at least one groove provided, extending in the intersecting direction, and each configured to accommodate each of the contact pins and includes at least one hole provided aligned with the groove in the intersecting direction and recessed deeper than the groove from the surface,

wherein the groove is formed in a surface of the housing in contact with an outside, and

wherein the contact pin is exposed to the outside of the housing in a state where the contact pin is accommodated in the groove.

2 . The plug connector according to claim 1 ,

wherein the housing includes a base part and a protruding part protruding in the intersecting direction from the base part and configured to be inserted in the host connector,

wherein the groove is provided in a surface of the protruding part, and

wherein the hole is provided in the protruding part and adjacent to the base part.

3 . The plug connector according to claim 1 ,

wherein a plurality of holes each being the hole are provided,

wherein the plurality of holes are arranged aligned at a predetermined interval in the predetermined direction, and

wherein the predetermined interval is less than or equal to 0.5 mm.

4 . A housing for a plug connector, the housing comprising:

a base part; and

a protruding part protruding in one direction from the base part and configured to be inserted in a host connector,

wherein the base part includes insertion holes used for insertion of contact pins,

wherein the protruding part includes grooves used for accommodation of the contact pins,

wherein each of the grooves is provided in a surface of the protruding part in contact with an outside, extends in the one direction, corresponds to each of the insertion holes of the base part, and is configured to accommodate the contact pins in a state where the contact pins are exposed to the outside, and

wherein the protruding part includes holes provided aligned with the grooves in the one direction and recessed deeper than the grooves from the surface, and wherein the hole is adjacent to the base part.

5 . A manufacturing method of manufacturing a housing included in the plug connector according to claim 1 using a mold,

wherein a closed space is defined inside the mold when a stationary piece, slide pieces, and a movable piece are engaged with each other,

wherein the movable piece includes a plurality of core pins for forming insertion holes used for insertion of contact pins in the housing, and

wherein the slide piece includes a plurality of groove formation parts for forming grooves used for accommodation of the contact pins in the housing, protrusions provided to the groove formation parts and protruding in a direction in the closed space beyond the groove formation parts to form the holes, and fitting recesses formed in faces of the protrusions facing the movable piece,

the manufacturing method comprising:

a fitting step of fitting tip portions of the core pins of the movable piece into the fitting recesses of the slide pieces when the slide pieces and the movable piece are engaged with each other;

a resin injection step of injecting a liquid resin in the closed space defined by engagement of the stationary piece, the slide pieces, and the movable piece; and

a resin solidification step of cooling and solidifying the resin injected to the closed space.