One-part propelling and back-off mechanism and endoscope lower cutting anastomat formed by same

Abstract

The invention discloses a one-part propelling and back-off mechanism and an endoscope lower cutting anastomat formed by the same. The one-part propelling and back-off mechanism comprises a rotating rod, a driving shifting block, a return shifting block, a driving toothed plate, a transmission gear, a cutting toothed plate and a cutting rack, wherein the rotating rod rotates by overcoming tension of a spring, the driving shifting block and the return shifting block are fixedly connected with the rotating rod and connected with a driving toothed plate in a transmission mode, the driving toothed plate is connected with the transmission gear in a transmission mode, the cutting toothed plate and the transmission gear are coaxially installed, and the cutting rack is connected with the cutting toothed plate in a transmission mode. The endoscope lower cutting anastomat comprises the one-part propelling and back-off mechanism, a shell and an ejector rod, one end of the spring is fixedly connected with the rotating rod, and the other end of the spring is fixedly connected to the shell. The traditional process of propelling a cutting head three times is avoided, and the cutting head is propelled in place at a time.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a one-stage advancing and retracting mechanism and an endoscopic cutting stapler composed of the same. Background technique [0002] At present, many endoscopic cutting staplers on the market are mainly imported brand Johnson & Johnson. The firing parts of this product are mainly composed of cutting handle, cutting knife pushing block, return spring, connecting rod latch, and latch return spring. , rack, large gear, pinion, cutting stroke display, ratchet and other parts. The triggering method is to push the cutter to push the block forward through the handle lever. However, due to the short arm, it needs to be pulled three times in a row to complete the entire cutting process. The handle, although the cutting stroke display is designed in consideration of the doctor's easy to forget the number of cuts, but this cutting method has several disadvantages: first, the cutting proce...

AI Technical Summary

Problems solved by technology

[0002] At present, many endoscopic cutting staplers on the market are mainly imported brand Johnson & Johnson. The firing parts of this product are mainly composed of cutting handle, cutting knife pushing block, return spring, connecting rod latch, and latch return spring. , rack, large gear, pinion, cutting stroke display, ratchet and other parts. The triggering method is to push the cutter to push the block forward through the handle lever. However, due to the short arm, it needs to be pulled three times in a row to complete the entire cutting process. The handle, although the cutting stroke display is designed in consideration of the doctor's easy to forget the number of cuts, but this cutting method has several disadvantages: first, the cutting process is complicated, and second, the doctor needs to pull the handle three times during the operation to complete the cut; in addition, the mechanism of the instrument More, complex structure, poor reliability

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