Reinforced Sensor Needle Structure for Opening Strength

The patent applies local quality by forming a reinforcement portion only at the specific location where the opening portion is formed in the tubular side wall. This localized reinforcement structure increases the thickness or density of the needle member at the opening portion, thereby maintaining overall strength while still allowing the opening to function for sensor implantation. The reinforcement portion is strategically placed to counteract the weakness introduced by the opening without compromising the ease of operation.

The patent resolves this contradiction by maintaining a thin overall needle member design to minimize stress on the subject, while simultaneously forming a reinforcement portion at the critical opening portion location. This localized reinforcement provides the necessary strength and reliability to prevent bending or breakage during insertion and measurement, without requiring the entire needle member to be thicker. The reinforcement portion acts as a strategic strengthening point that preserves both subject comfort and structural reliability.

The patent avoids the need to make the entire needle member thicker by applying local quality through the reinforcement portion. This reinforcement is formed only at the opening portion where strength is most needed, allowing the rest of the needle member to remain thin and minimize stress on the subject. The localized reinforcement provides the necessary resistance to bending or breakage without the penalty of increased overall thickness and associated subject discomfort.