Nail head assembly of stitching device and sewing cutting device

Abstract

The invention provides a nail head assembly of a stitching device and a sewing cutting device. The nail head assembly comprises a U-shaped frame. The U-shaped frame is composed of a right lateral section and a left lateral section which are arranged in parallel and a connection arm arranged between the right lateral section and the left lateral section. A pull rod frame is arranged at the far end of the right lateral section, a through hole is arranged on the pull rod frame, a locking mechanism used for fixing the far end of a pull rod is arranged at the far end of the left lateral section relatively, and a locking matching mechanism matched with the locking mechanism is arranged at the far end of the pull rod. After the locking matching mechanism at the far end of the pull rod is locked on the locking mechanism on the left lateral section, the right lateral section, the connection arm, the left lateral section and the pull rod of the U-shaped frame are arranged in a square shape. The nail head assembly has the advantages of effectively improving nail head strength, reducing parallelism deflection of a nail anvil and a nail bin and being widely used in a linear stitching device, a linear sewing cutting device or an arc sewing cutting device.

Description

technical field [0001] The invention relates to a nail head assembly of a surgical instrument, in particular to a nail head assembly of a linear stapler, a linear stapler, or an arc cutter. Background technique [0002] Staplers or stitch cutters are primarily used to form straight or curved sutures, and the basic firing principle is roughly the same. Among them, the curved seam cutter is mainly suitable for low anterior resection of the rectum. For example, the curved seam cutter disclosed in US Pat. During the operation, the lower pelvic floor can be penetrated. More importantly, suturing and cutting can be completed in one operation, which simplifies the steps of distal rectal resection. [0003] Like the linear stapler disclosed in US Pat. No. 6,817,508, the curved stapler mainly includes a staple cartridge, an anvil, a firing handle, and transmission components. The existing U-shaped frame for placing the nail anvil and the nail bin is integrally formed of an aluminu...

AI Technical Summary

Problems solved by technology

However, due to the insufficient strength of the aluminum alloy material, the nail U-shaped frame is deformed under force when the stapler or the seam cutter is fired, so that the nail anvil and the nail bin on it are not parallel to each other, which leads to poor nail formation. One way in the technology is to make the aluminum alloy material of the U-shaped frame very thick, which will cause the head structure to expand, affect the operation space, and cause the instruments to be very heavy, and the doctor's operation is also very hard

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