CN103156658B - Nail bin assembly of circular tube type binding instrument - Google Patents

Abstract

The present invention discloses a nail magazine assembly of a round tube type binding instrument, comprising a nail magazine and a nail pushing seat and a nail pushing sheet slidably arranged in the nail magazine, the nail pushing sheet being provided with at least one barb cooperating with the surface of the nail magazine for limiting the reset of the nail pushing sheet, a cutter being fixed on the nail pushing seat, the nail pushing sheet being clamped at the distal end of the nail pushing seat, and the nail pushing sheet and the nail pushing seat being fixed to each other in the direction of movement when the round tube type binding instrument is binding. The beneficial effects of the present invention are mainly reflected in that the cutter can be retracted into the nail magazine after binding is completed, ensuring the safety of the operation; and the nail pushing sheet being placed outside the nail magazine plays a role in preventing secondary firing.

Description

A staple cartridge assembly of a circular tube type binding instrument

technical field

The invention relates to a nail magazine assembly of a circular tube type binding instrument for surgical operations, belonging to the technical field of medical instruments.

Background technique

The circular tube binding instrument is a surgical instrument widely used in digestive tract reconstruction surgery. For example, U.S. Patent No. 5,205,459 describes a circular tube binding instrument, which consists of a nail head assembly and a firing assembly. Two sections of tissue to be connected are placed in the Between the nail anvil and the nail bin of the nail head assembly, adjust the position of the nail anvil and the nail bin so that they are close to and clamp the tissue, and then the firing component is fired to shape the nail and complete the connection of the two sections of tissue.

After firing the circular tube type binding instrument, especially the circular tube type hemorrhoid binding instrument, in order to prevent the "recovery stress" of the nail from causing the nail to form loosely, the doctor will often hold the firing handle tightly for more than 30 seconds after firing to ensure that the nail Well formed. Continuous force for 30 seconds is very strenuous for the doctor, and the operation may fail due to improper force application. Because the two-firing process will cause excessive extrusion of the nail, the originally well-formed nail will become deformed, which will affect the safety of the suture and bring risks to the operation.

The applicant applied for the Chinese patent ZL201020664436.8 on December 16, 2010, which discloses a nail cartridge assembly with a secondary firing safety function, including a staple cartridge and mutually fixed push nails arranged in the staple cartridge A seat and a nail pusher, the nail pusher is provided with at least one barb that cooperates with the surface of the nail cartridge to limit the reset of the nail pusher. Although this patent provides the function of preventing secondary firing, it also brings about a problem: the blade of the cutter fixed on the push nail seat is exposed outside the staple cartridge after binding, which may cause the risk of injuring other tissues .

In the present invention, the contents described in the above-mentioned patents are cited as prior art.

Contents of the invention

In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a safe and reliable staple cartridge assembly of a circular tube-type stapler.

The purpose of the present invention will be achieved through the following technical solutions:

A staple cartridge assembly of a circular tube-type stapler, comprising a staple cartridge, a staple pusher seat and a staple push piece slidably arranged in the staple cartridge, and the staple push piece is provided with at least one piece that cooperates with the surface of the staple cartridge to limit the staple push. The barb that resets the piece, the cutter is fixed on the push nail seat, the nail push piece is clamped on the far end of the push nail seat, and the nail push piece is connected with the The push nail seats are fixed to each other in their direction of motion.

Preferably, the locking structure between the nail pushing piece and the nail pushing seat is a stepped locking.

Compared with the prior art, the beneficial effects of the present invention are mainly reflected in that the cutter can be returned to the staple bin after the stapling is completed, so as to ensure the safety of the operation; Played the role of anti-secondary firing.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the staple cartridge assembly of the round tube type binding instrument of the present invention during binding.

Fig. 2 is a three-dimensional schematic diagram of the staple cartridge assembly of the round tube type binding instrument of the present invention after the binding is completed.

Detailed ways

The present invention discloses a staple cartridge assembly of a circular tube type binding instrument, as shown in Fig. 1 and Fig. 2, comprising a staple cartridge 11, a staple cartridge 1 disposed at the far end of the staple cartridge 11, and push nails disposed in the staple cartridge Seat 2 and push nail piece 3, and cutter 4 is fixed on the described nail push seat 2. Consistent with the prior art, the nail pusher 3 is provided with at least one barb (not shown) that cooperates with the surface of the staple cartridge 1 and is used to limit the reset of the nail pusher 3 . In this way, the staple pusher is placed outside the staple bin after the stapling is completed, which plays a role in preventing secondary firing. The applicant has fully disclosed it in the prior art, and will not repeat it here.

The present invention is characterized in that: the push nail piece 3 is clamped on the far end of the push nail seat 2, as shown in Fig. The seats 2 are fixed to each other in their direction of movement. As shown in Figure 2, after the binding of the circular tube type binding instrument is completed, the push nail seat 2 will be driven to move backward due to the reset of the firing mechanism of the circular tube type binding instrument, and at this time the described nail pushing piece 3 is barbed Clamped on the staple cartridge 1 so that there is no movement, so that the nail pusher 3 and the pusher seat 2 are separated from each other in the direction of their movement, and the cutter 4 fixed on the nail pusher 2 will return to the staple cartridge 1, thus preventing the cutting knife 4 from cutting into other tissues.

The clamping structure between the nail pushing piece and the nail pushing seat is a stepped clamping connection, or a zigzag clamping connection. The present invention has no specific limitation on the clamping structure. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

When the present invention is assembled, the cutter and the nail pusher are first fixedly installed, and then they are loaded into the nail barrel together; then the nail pusher is clamped to the nail pusher, and finally the nail cartridge is installed on the far end of the nail pusher And make the nail bin and the nail barrel fixedly connected.

Claims (2)

1. the nail bin groupware of a tubular binding strument, the ejector pin seat comprising nail bin and be slidably arranged in nail bin and pushing slice of nail, described pushing slice of nail is provided with the hangnail that at least one and nail bin surface engagement reset for limiting pushing slice of nail, described ejector pin seat is fixed with cutting knife, it is characterized in that: described pushing slice of nail is connected in the far-end of described ejector pin seat, described pushing slice of nail is provided with the hangnail of at least one and nail bin surface engagement; When described tubular binding strument is bound, described pushing slice of nail and ejector pin seat interfix in its direction of motion, after described tubular binding strument bookbinding, described ejector pin seat moves backward, described pushing slice of nail is stuck on described nail bin by hangnail, and described pushing slice of nail and described ejector pin seat mutually depart from its direction of motion.

2. the nail bin groupware of tubular binding strument according to claim 1, is characterized in that: the interface arrangment between described pushing slice of nail and ejector pin seat is step clamping.