Portable apparatus and portable timepiece having a push button

A portable timepiece comprising:

• a timepiece exterior assembly including a case body having a recess portion opened to a case body outer face and provided with a through hole at an innermost wall of the recess portion;
• a pipe having an outwardly arranged cylinder portion having a spring receiving face, and an inserting cylinder portion integral with the outwardly arranged cylinder portion, the inserting cylinder portion being inserted in the through hole and fixed to the case body with the outwardly arranged cylinder portion disposed in the recess portion of the case body;
• a push button having a shaft portion axially slidable in the pipe, a drawout preventing member attached to one end portion of the shaft portion inside the case body for preventing the shaft portion from being drawn out from the pipe, and an operating head provided at the other end of the shaft portion outside of the case body;
• a coil spring interposed between the operating head and the spring receiving face for urging the push button toward an outer side of the case body and forming a gap between the innermost wall and the operating head to enable the push button to be pushed inwardly against the urging of the coil spring;
• and
• a packing ring attached to either of the pipe and the push button within a range of a height of the coil spring for sealing an interval between the pipe and the push button.

A portable appratus comprising:

• a casing having a through-hole that extends from an outer face of the casing to an inner face thereof;
• a pipe having an inner cylinder portion inserted into the through-hole and fixed to the casing, and an outer cylinder portion integral with the inner cylinder portion and extending outside the casing;
• a push button having a shaft portion and a head portion, the shaft portion being axially slidable in the pipe and slidably contacting the outer cylinder portion throughout the length of the outer cylinder portion, and the shaft portion having an inner end that extends inside the casing and an outer end that extends outside the casing and is connected to the head portion;
• a coil spring encircling the outer cylinder portion of the pipe and interposed between the head portion and a spring receiving face of the outer cylinder portion for urging the push button outwardly to an outward position and enabling the push button to be pushed inwardly against the urging of the coil spring to an inward position;
• and
• a packing ring attached to either the outer cylinder portion of the pipe or the shaft portion of the push button in the region where the coil spring encircles the outer cylinder portion to seal a space between the pipe and the push button.