When using plastic products used in medical sites, often it is used that the hands’ feeling of actual users, such as doctors, nurses, and researchers at various laboratories. In general, plastic products used in the medical field, unless a mechanism that gives a sense of lock during work is not provided, can not rely on the sense of the hand, which can lead to work errors. As a result, if the products are used without secure state, it may result to  be serious mistakes like that the plastic product may come off or fall off.

Products used in the medical field are often used a combination of multiple plastic molded parts, and it is common to provide a lock mechanism as a “foolproof mechanism” to prevent operation errors. In order to create a lock or click feeling with the lock mechanism, it is necessary to create a hard part and a soft part and combine them. By a “click” sound is heard when the parts are tightened as described above, it is possible to  prevent the mistakes because the operator can confirm that the parts are securely tightened.