Bicycle brake lock device and bicycle brake assembly comprising same

A bicycle brake locking device for a bicycle brake including first and second pivot links coupled to each other to be rotatable about a rotary shaft and brake pads coupled to predetermined ends of the first and second pivot links, the first and second pivot links being rotated to press the brake pads against a bicycle wheel when the bicycle brake is manipulated by a user,

• the bicycle brake locking device comprising a locking unit coupled to both the first and second pivot links to restrain the first and second pivot links from rotating in a state in which the first and second pivot links have been rotated to press the brake pads against the bicycle wheel, thereby restraining the bicycle brake in an operating position, wherein the locking unit selectively operates in a lock mode to restrain the first and second pivot links from rotating or a release mode to release rotational restraint of the first and second pivot links when manipulated by a user using a key,
• wherein the locking unit comprises:
• a first locking body provided on a portion of the first pivot link to rotate integrally with the first pivot link,
• a second locking body provided on a portion of the second pivot link to overlap the first locking body so as to rotate integrally with the second pivot link;
• and
• a key block fixed to the first locking body and extending through and coupled to both the first locking body and the second locking body, the key block being configured to be manipulated using the key,
• wherein, when the first and second pivot links are rotated to the operating position of the bicycle brake in a state the key block has been manipulated to a lock mode, the first and second locking bodies are restrained from rotating,
• wherein the locking unit further comprises:
• a rotational engagement member coupled to the key block to rotate and move integrally with the key block when the key block is rotationally manipulated, and having an engagement portion provided on a portion thereof, and
• a stepped portion provided on the second locking body to be engaged with the engagement portion of the rotational engagement member when the first and second pivot links are rotated to the operating position of the bicycle brake in the state in which the key block has been rotationally manipulated to the lock mode,
• wherein, as the engagement portion and the stepped portion are engaged with each other, the first and second pivot links are restrained from rotating, remaining in the operating position of the bicycle brake, and
• wherein the rotational engagement member is elastically pressed using a separate elastic member, in a direction in which the rotational engagement member is in close contact with a surface of the second locking body, on which the stepped portion is provided.