Tubular lock for push locking

A tubular lock for push locking comprising:

• a lock housing having at least one positioning recess, and the at least one positioning recess formed in an inner sidewall of the lock housing;
• a switching handle having:
• a rear end portion rotatably mounted in a front end portion of the lock housing;
• and
• at least one positioning hole radially formed through the rear end portion of the switching handle, and each of the at least one positioning hole of the switching handle selectively corresponding in position to one of the at least one positioning recess of the lock housing;
• an upper pin seat rotatably mounted in the switching handle and disposed in a front end portion of the switching handle, and the upper pin seat having a mounting hole axially formed in the upper pin seat;
• a lower pin seat mounted through a rear end portion of the lock housing and the rear end portion of the switching handle, abutting against a rear end surface of the upper pin seat and securely connected with the switching handle, and the lower pin seat having:
• a receiving recess formed in a front end surface of the lower pin seat;
• at least one positioning hole radially formed through the lower pin seat and communicating with the receiving recess, and each of the at least one positioning hole of the lower pin seat aligning with one of the at least one positioning hole of the switching handle;
• and
• at least one limiting pin, and each of the at least one limiting pin mounted in one of the at least one positioning hole of the lower pin seat and one of the at least one positioning hole of the switching handle that align with each other, wherein a length of each of the at least one limiting pin is longer a sum of a depth of a respective one of the at least one positioning hole of the lower pin seat and a depth of a respective one of the at least one positioning hole of the switching handle;
• multiple pin assemblies mounted in the upper pin seat and the lower pin seat, and separately arranged around the mounting hole of the upper pin seat and around the receiving recess of the lower pin seat;
• and
• a core shaft slidably mounted through the receiving recess of the lower pin seat and the mounting hole of the upper pin seat, engaging with the upper pin seat and selectively engaging with the lower pin seat, and the core shaft having a buffer annular groove formed in a rear end of the core shaft, wherein a main resilient element pushes the core shaft to protrude forwardly toward the front end portion of the switching handle;
• wherein when the lower pin seat is at a locking angular position and the lock core engages with the lower pin seat, the core shaft is able to disengage from the pin seat by turning the core shaft, so as to allow the main resilient element to push the core shaft to protrude out from the front end portion of the switching handle and the buffer annular groove to correspond in position to the at least one limiting pin;
• and
• when the lower pin seat is at the locking angular position and the lock core disengages from the lower pin seat, the core shaft and the lower pin seat is able to engage with each other by pushing the core shaft to compress the main resilient element.