Importance

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Abstract

A guiding apparatus M comprises a stopper 30 for restricting the depth of insertion of a sheath 10. The sheath 10 is slidingly movably inserting into the stopper 30. Moreover, a lock bar 40, which is generally in orthogonal relation to the sheath 10, is received in the stopper 30. One end portion of the lock bar 40 projects from the stopper 30 and serves as a control portion 41, while the other end portion thereof is provided with slits 42a and serves as a biasing portion 42. A recess 43 for partly receiving therein the sheath 10 is formed in an intermediate section of the lock bar 40. An inner surface of the recess 43 is urged against an outer periphery of the sheath 10 under the effect of the biasing portion 42, thereby locking the stopper 30 to the sheath 10. By pressing the control portion 41 against the force of the biasing portion 42, the stopper 30 is unlocked.

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First Claim