There is the anastomat of double safety mechanismTechnical field
The invention belongs to medical instruments field, be specifically related to a kind of anastomat with double safety mechanism.
Background technology
Linear type suturing instrument is a kind of surgical operation attachment means of commonly using, is usually used in closed digestive tract and viscera tissue wound.Generally comprise housing, be fixed on two nail supporting base clamping plate in housing, be arranged at nail supporting base clamping plate far-end and for implement sew application nail anvil and nail bin, be arranged in nail supporting base clamping plate for promoting the actuating device of the nail in nail bin and nail bin, and be arranged on nail supporting base clamping plate and be connected in spacing handle and the ejector pin handle of actuating device by a rotating shaft pivot.Described actuating device comprises and is arranged at two nail supporting base clamping plate inner sides for two nail bin push pedals promoting nail bin and move to nail anvil direction along nail supporting base clamping plate and is arranged between two nail bin push pedals and for promoting the nail pushing plate of nail.
Doctor, in the time using apparatus, can be contained in the nail bin that suturing nail is housed on apparatus, carries out afterwards operation technique: 1, once closed, and closed spacing handle to two gear, the tissue limitations that will sew up is in suturing nail suture size; 2, secondary closure, closed spacing handle to three gear, by the tissue leveling extruding of sewing up; 3, percussion is sewed up, and closed ejector pin handle, to root, is released nail bin by suturing nail, and tissue is sewed up.The empty nail bin insurance institution of stiching instrument of the prior art mostly is nail bin and supports piece, after having pulled the trigger, nail bin supports piece can be closed, and ejector pin plate hook is pinned, can prevent secondary percussion, but the stiching instrument after percussion can reset, if doctor's use is an apparatus that sky nail bin is housed, after complete operation step 1 and 2, in the time carrying out step 3, just finding does not have suturing nail in nail bin, waste a large amount of energy and valuable time, even can therefore miss an opportunity because of a delay, caused operative failure.
Summary of the invention
The technical problem that will solve of the present invention overcomes above-mentioned technological deficiency; a kind of anastomat with double safety mechanism is provided; after percussion; can not again pull the trigger the closed anastomat with closed insurance institution and firing safety mechanism again at empty nail bin state, effectively improve the reliability of the empty nail bin protection of stiching instrument.
The technical solution used in the present invention is: a kind of anastomat with double safety mechanism, comprise that nail supporting base, inside are provided with the nail bin of some staples, two for promoting the nail bin push pedal of nail bin and promoting the nail pushing plate of staple, nail pushing plate is connected with pushing slice of nail, wherein have in a nail bin push pedal and be provided with safety block, nail pushing plate is provided with stop pin, in nail bin, have under spike state, front end and the pushing slice of nail of described safety block offset, and depart from nail pushing plate; The front end hook that ejector pin finishes rear safety block pins nail pushing plate, and rear end hook separates with stop pin; After empty nail bin playback, the front end hook of safety block pins nail pushing plate, and rear end hook pins stop pin.
The invention has the beneficial effects as follows, while having nail in nail bin, safety block can be opened, carry out operation technique; When while nail in nail bin, nail bin resets, safety block closure, front end restriction nail pushing plate, rear end hook hook pins stop pin, realizes dual fail-safe---the anti-percussion of empty nail bin, the anti-closure of empty nail bin.
Brief description of the drawings
Fig. 1 is the partial schematic diagram of original state of the present invention;
Fig. 2 is the partial schematic diagram after closure of the present invention, before ejector pin;
Fig. 3 is the partial schematic diagram after ejector pin of the present invention;
Fig. 4 is the partial schematic diagram after the empty nail bin of the present invention resets.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further elaborated, is convenient to those skilled in the art and understands the present invention.
Stiching instrument of the present invention, comprise that nail supporting base 1, inside are provided with the nail bin 2 of some staples, two for promoting the nail bin push pedal 3 of nail bin and promoting the nail pushing plate 4 of staple, nail bin push pedal 3 is symmetricly set on the both sides of nail pushing plate 4, nail pushing plate 4 is connected with pushing slice of nail 5, can adopt groove to be connected with the mode that convex tendon coordinates being connected between pushing slice of nail 5 and nail pushing plate 4, this is connected to conventional connection, repeats no more.Nail bin push pedal 3 is connected with firing components with nail pushing plate 4, wherein has in a nail bin push pedal 3 and is provided with safety block 6, and nail pushing plate 4 is provided with stop pin 7.
Original state as shown in Figure 1, band nail nail bin packs in apparatus, and the front end of described safety block 6 and pushing slice of nail 5 offset, and rear end hook 62 separates with stop pin 7, and safety block 6 departs from nail pushing plate 4.As shown in Figure 2, after twice closure completes, readiness for closing ejector pin handle, safety block 6 is opened, with nail pushing plate 4 are disengaged positions, now can ejector pin.As shown in Figure 3, after ejector pin finishes, the front end hook 61 of safety block 6 pins nail pushing plate 4, and rear end hook 62 separates with stop pin 7, and this space-time nail bin can not be pulled the trigger again.As shown in Figure 4, after empty nail bin playback, the front end hook 61 of safety block pins nail pushing plate 4, and rear end hook 62 pins stop pin 7, and apparatus can not be again closed.