Clamshell housing for dispensing tube of metering dispenser

A housing for a dispensing tube of a metering dispenser, comprising:

• a mounting half for mounting the housing to a metering dispenser;
• a strike half for receiving plunger strikes;
• the strike half carried by the mounting half;
• the mounting half having a mounting half tube channel defined therein for receiving a dispensing tube;
• the mounting half having a plunger aperture defined through the mounting half tube channel for receiving a plunger;
• the strike half having a plunger strike surface;
• the strike half being pivotally carried by the mounting half so as to be pivotable, relative to the mounting half, between:
• a first pivotal position in which the strike half at least partially covers the mounting half tube channel;
• and
• a second pivotal position in which the strike half exposes the mounting half tube channel;
• and
• the strike half further being slidably carried by the mounting half so as to be slidable relative to the mounting half, at least when the strike half is in the first pivotal position, between:
• a first slide position in which pivotal movement of the strike half relative to the mounting half from the first pivotal position toward the second pivotal position is obstructed;
• and
• a second slide position in which pivotal movement of the strike half relative to the mounting half from the first pivotal position toward the second pivotal position is permitted;
• wherein, at least when the strike half is in the first pivotal position and in the first slide position, the plunger strike surface is in registration with and facing the plunger aperture to receive a plunger head,
• wherein the strike half is hingedly carried by the mounting half by way of a pivot extending between the mounting half and the strike half and on which the strike half is rotatably received so as to be rotatable about the pivot between the first pivotal position and the second pivotal position, and
• wherein the strike half further being slidable along the pivot, at least when the strike half is in the first pivotal position, between the first slide position and the second slide position.