Safety mechanism and anastomat with sameTechnical Field
The invention relates to the field of anastomats, in particular to an anastomat with a safety mechanism.
Background
the anastomat is a device used in medicine to replace manual suture, and is mainly used for closing stumps or incisions in endoscopic gastrointestinal reconstruction and organ resection operations. Is suitable for various open or minimally invasive common surgeries, obstetrics and gynecology, urology surgery, thoracic surgery and pediatric surgeries. They may be used in conjunction with staple lines or tissue supporting materials. These devices may also be used for the dissection and resection of liver parenchyma (hepatic vasculature and biliary architecture), pancreas, kidney, and spleen. Due to the development of modern science and technology and the improvement of manufacturing technology, the anastomat used clinically at present has the advantages of reliable quality, convenient use, tightness, proper tightness, quick suture, simple and convenient operation, few side effects and operation complications and the like, and can also ensure that the tumor operation which cannot be resected in the past can be resected with premonition, thereby being popular and advocated by clinical surgeons at home and abroad. The stapler mainly works on the principle that titanium nails are used for separating or anastomosing tissues, and is similar to a stapler.
Because the anastomat is internally provided with a very sharp cutting knife, and the anastomat goes deep into the patient internally, if the cutting knife fails to be triggered accidentally according to the operation flow, accidental injury can be caused to the patient, and the life safety of the patient is threatened, therefore, it is necessary to provide a safety mechanism for the anastomat, the safety mechanism is used for locking the cutting knife triggering mechanism in a non-use state, and the locking is released when the anastomat is required to be used.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
In order to solve the problems, the invention adopts the technical scheme that a safety mechanism is provided, which comprises at least one safety switch, a safety pin fixedly connected with the safety switch and a trigger handle selectively limited by the safety pin; the safety pin shaft comprises a propping convex block, a plurality of tooth-shaped structures are arranged on the contact surface of the propping convex block and the trigger handle, and the tooth-shaped structures are also arranged on the contact surface of the trigger handle and the propping convex block.
Preferably, the safety pin shaft further comprises a limiting clamping groove and a limiting turned edge, the limiting turned edge is located on one side edge of the limiting clamping groove, and an embedded convex block arranged on a clamping handle is embedded into a gap between the limiting turned edge and the limiting clamping groove in the locking state of the safety mechanism.
Preferably, the section of the embedded lug is of an approximately triangular structure, a sharp corner structure is formed by the first surface and the second surface, and the sharp corner structure can be embedded into a gap between the limiting turned edge and the limiting clamping groove.
Preferably, when the clamping handle is in the open state, the embedded convex block is embedded into a gap between the limiting turned edge and the limiting clamping groove, the safety pin shaft is clamped and locked, and the tooth-shaped structure on the abutting convex block of the safety pin shaft is matched with the tooth-shaped structure of the trigger handle to lock the trigger handle.
Preferably, under the action of external force, the clamping handle rotates around a pin shaft, the embedded lug is separated from a gap between the limiting turned edge of the safety pin shaft and the limiting clamping groove, and the rotation limitation on the safety pin shaft is removed.
Preferably, the direction of the acting force of the surface of the tooth-shaped structure of the trigger handle matched with the tooth-shaped structure on the resisting projection is the direction of resisting the trigger handle to rotate around the pin shaft.
Preferably, the trigger handle comprises a pulling projection, the pulling projection corresponds to the position of the stopping projection of the safety pin shaft, and the stopping projection rotates to drive the trigger handle from a hidden state to an exposed state.
Preferably, the trigger handle further comprises a spring clamping piece, a spring clamping groove is formed in the pin shaft of the clamping handle, the spring clamping piece and the spring clamping groove are connected with a spring, and the spring is used for resetting after the trigger handle is triggered.
preferably, the trigger handle comprises a trigger protrusion, the trigger protrusion corresponds to a position of a cutting knife trigger unit, and when the trigger handle is unlocked, the trigger handle is pulled, and the trigger protrusion triggers the cutting knife trigger unit.
Compared with the prior art, the invention has the beneficial effects that: 1. the contact surface of the abutting convex block and the trigger handle is provided with a plurality of tooth-shaped structures, and the contact surface of the trigger handle and the abutting convex block is also provided with the tooth-shaped structures which are used for increasing friction force and preventing the trigger handle from being triggered accidentally; 2. the cutting surface of the embedded lug is of an approximately triangular structure, so that the one-way limiting of the safety pin shaft can be realized, and the switching between the locking state and the unlocking state is convenient; 3. the safety mechanism adopts double limiting, namely the safety pin shaft is clamped by the embedded convex block, and then the trigger handle is locked by the safety pin shaft, so that the structural reliability of the safety mechanism is ensured, the hierarchy and the step of operation are increased, namely the trigger handle is ensured not to act before the clamping handle does not act.
Drawings
FIG. 1 is a partial structural view of a stapler according to the present invention;
FIG. 2 is a schematic view of a safety switch of the safety mechanism of the present invention;
FIG. 3 is a schematic view of a state switching slot of the safety mechanism of the present invention;
FIG. 4 is a schematic view of the positioning structure of the safety mechanism of the present invention in the stapler;
FIG. 5 is a first schematic structural diagram of a safety mechanism according to the present invention;
FIG. 6 is a second schematic structural view of the safety mechanism of the present invention;
FIG. 7 is an exploded view of the safety mechanism of the present invention;
FIG. 8 is a schematic structural view of a safety pin of the present invention;
FIG. 9 is a schematic structural view of the trigger handle of the present invention;
FIG. 10 is a schematic view of the construction of the clamping handle of the present invention;
FIG. 11 is an exploded view of the safety mechanism of the present invention;
FIG. 12 is an exploded view of the locking position of the safety mechanism of the present invention;
Fig. 13 is an exploded view of the safety mechanism of the present invention in the unlocked state.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
The invention provides a safety mechanism for limiting the movement of a cutting knife component of a anastomat and preventing accidental excitation, as shown in figures 2 and 3, the safety mechanism comprises:
At least one safety switch 1, where the safety switch 1 can slide along a sliding groove portion of a state switching groove 11 to realize state switching, the state switching groove 11 includes a first state clamping groove 111 and a second state clamping groove 112, and as shown in fig. 7, a state switching clamping block 13 is disposed on the safety switch 1; when the state switching latch 13 is located in the first state latch slot 111, the safety switch 1 is in a locked state, and when the state switching latch 13 is located in the second state latch slot 112, the safety switch 1 is in an unlocked state.
Example two
the safety mechanism as described above, the difference between this embodiment and the embodiment is that, as shown in fig. 5 to 11, the safety mechanism further includes a safety pin 2, a trigger handle 3, and a clamping handle 4;
The safety pin shaft 2 comprises at least one action clamping block 22, the safety switch 1 is provided with an action clamping groove 12 corresponding to the action clamping block 22, and the action clamping block 22 is clamped and matched with the action clamping groove 12, so that the safety switch 1 is fixedly connected with the safety pin shaft 2, and the safety pin shaft 2 synchronously rotates when the safety switch 1 is pulled;
the safety pin shaft 2 further includes a stopping protrusion 21, the stopping protrusion 21 is used for stopping a limited component, in this embodiment, the limited component is the trigger handle 3, a contact surface between the stopping protrusion 21 and the trigger handle 3 is provided with a plurality of tooth structures for increasing friction force and preventing the trigger handle 3 from being triggered accidentally, and the contact surface between the trigger handle 3 and the stopping protrusion 21 is also provided with a tooth structure 34 which is matched with the tooth structure of the stopping protrusion 21 to increase friction force of the contact surface.
the safety pin shaft 2 further comprises a limiting clamping groove 24, the limiting clamping groove 24 can be matched with an external limiting component to limit the rotation of the safety pin shaft 2, and in the embodiment, the external limiting component is an embedded bump 42 arranged on the clamping handle 4;
the safety pin shaft 2 further comprises a limiting turned edge 23, the limiting turned edge 23 is located on one side edge of the limiting clamping groove 24, and in the locking state of the safety mechanism, an embedded convex block 42 arranged on the clamping handle 4 is embedded into a gap between the limiting turned edge 23 and the limiting clamping groove 24, so that unidirectional limiting of the safety pin shaft 2 is realized;
preferably, the section of the embedded bump 42 is a structure similar to a triangle, a sharp corner structure is formed by the first surface and the second surface, and the formed sharp corner structure can be embedded into the gap between the limiting turned edge 23 and the limiting clamping groove 24, so as to realize unidirectional limiting of the safety pin shaft 2; when the clamping handle 4 is in an open state, the safety pin shaft 2 is clamped tightly by the embedded convex block 42, the safety pin shaft 2 is prevented from rotating, when the clamping handle 4 rotates to a clamping state under the action of external force, the clamping handle 4 rotates around the pin shaft 41, the embedded convex block 42 moves towards the lower oblique direction, and the embedded convex block 42 is separated from a gap between the limiting curled edge 23 and the limiting clamping groove 24 of the safety pin shaft 2, so that the rotation limitation on the safety pin shaft 2 is relieved.
When the clamping handle 4 is in an open state, the embedded convex block 42 is embedded into a gap between the limiting turned edge 23 and the limiting clamping groove 24, the safety pin shaft 2 is clamped, the safety pin shaft 2 is prevented from rotating, a tooth-shaped structure on the abutting convex block 21 of the safety pin shaft 2 is matched with the tooth-shaped structure 34 of the trigger handle 3, the trigger handle 3 is locked, and therefore the trigger handle 3 is prevented from accidental movement; at this time, the safety switch 1 cannot be pulled freely by the locking force of the fitting projection 42.
preferably, the matching form of the safety pin shaft 2 and the safety switch 1 can be a clamping block and a clamping groove matching, can also be a key connection, and can also be a bolt fixation, and as long as the safety switch 1 can be pulled, the connection form of the synchronous rotation of the safety pin shaft 2 is within the protection scope of the invention.
Preferably, the trigger handle 3 rotates around a pin 31, and in the locking state of the safety mechanism, the acting force direction of the mating surfaces of the tooth-shaped structure 34 of the trigger handle 3 and the tooth-shaped structure on the stopping protrusion 21 is the direction of stopping the trigger handle 3 from rotating around the pin 31.
EXAMPLE III
As mentioned above, the present embodiment is different from the above safety mechanism in that the trigger handle 3 includes a pulling protrusion 33 corresponding to the position of the stopping protrusion 21 of the safety pin 2, and configured to rotate the trigger handle 3 from the hidden state to the exposed state;
When the safety mechanism is unlocked, the clamping handle 4 rotates to a clamping state under the action of external force, the clamping handle 4 rotates around the pin shaft 41, the embedded lug 42 moves obliquely downwards, the embedded lug 42 is separated from a gap between the limiting curled edge 23 and the limiting clamping groove 24 of the safety pin shaft 2, so that the rotation limitation of the safety pin shaft 2 is removed, the safety switch 1 can be pulled to realize the switching between the clamping grooves 112 in the second state when the clamping groove 111 is in the first state and drive the safety pin shaft 2 to rotate, the stopping lug 21 arranged on the safety pin shaft 2 rotates and touches the pulling lug 33, so that the trigger handle 3 is driven to rotate around the pin shaft 31, and the tooth-shaped structure of the stopping lug 21 is separated from the tooth-shaped structure 34 of the trigger handle 3, and releasing the locking state of the safety pin shaft 2 on the trigger handle 3, and further facilitating the triggering operation of the trigger handle 3 by a user according to the requirement.
Example four
As described above, the safety mechanism of this embodiment is different from the safety mechanism of this embodiment in that, the trigger handle 3 further includes a spring clamping piece 32, the clamp handle 4 is provided with a spring clamping groove on the pin shaft 41, the spring clamping piece 32 and the spring clamping groove are connected with a spring 5, the spring 5 is used for resetting after the trigger handle 3 is triggered, the trigger handle 3 winds the pin shaft 31 rotates, and the spring clamping piece 32 is arranged at the end far away from the clamp handle 4.
EXAMPLE five
An anastomat with the safety mechanism is shown in a combined drawing 1 and a drawing 4, the trigger handle 3 comprises a trigger bump 35, the trigger bump 35 corresponds to a cutting knife trigger unit 6 in position, when the trigger handle 3 is unlocked, the trigger handle 3 is pulled to enable the trigger bump 35 to move relatively, and then the trigger bump 35 triggers the cutting knife trigger unit 6 to enable the cutting knife trigger unit 6 to act to touch a cutting knife trigger switch 61, so that the cutting knife is triggered.
preferably, the trigger handle 3 is hidden inside the main body mechanism of the stapler when in a locked state, so that the safety of the stapler is improved and accidental triggering is prevented.
Referring to fig. 12, it is a schematic diagram of positions of components of the trigger handle 3 in a locked state when the clamping handle 4 is in an open state, at this time, the embedded protrusion 42 is embedded in a gap between the limiting turned edge 23 and the limiting clamping groove 24, so as to tightly clamp the safety pin shaft 2 and prevent the safety pin shaft 2 from rotating, and a tooth-shaped structure on the abutting protrusion 21 of the safety pin shaft 2 is matched with the tooth-shaped structure 34 of the trigger handle 3, so as to lock the trigger handle 3, thereby preventing the trigger handle 3 from accidental movement; at this time, the safety switch 1 cannot be pulled freely by the locking force of the fitting projection 42.
Referring to fig. 13, it is a schematic diagram of positions of components of the trigger handle 3 in an unlocking state when the clamping handle 4 rotates to a clamping state under an external force, the clamping handle 4 is pulled, at this time, the clamping handle 4 rotates around a pin shaft 41, the embedded protrusion 42 moves obliquely downward, the embedded protrusion 42 is separated from a gap between the limiting turned edge 23 and the limiting clamping groove 24 of the safety pin shaft 2, so as to remove the rotation limitation on the safety pin shaft 2, the safety switch 1 can be pulled, so as to realize switching between the first-state clamping groove 111 and the second-state clamping groove 112 and drive the safety pin shaft 2 to rotate, the stopping protrusion 21 arranged on the safety pin shaft 2 rotates and touches the pulling protrusion 33, so as to drive the trigger handle 3 to rotate around the pin shaft 31, the tooth-shaped structure of the stopping projection 21 is separated from the tooth-shaped structure 34 of the trigger handle 3, and the locking state of the safety pin shaft 2 on the trigger handle 3 is released, so that a user can conveniently trigger the trigger handle 3 according to the requirement.
the trigger handle 3 is pulled to enable the anastomat to complete cutting action, after the anastomat completes cutting action, the clamping handle 4 is returned to an opening state, the embedded convex block 42 is embedded into a gap between the limiting turned edge 23 and the limiting clamping groove 24 of the safety pin shaft 2 again, the limiting turned edge 23 of the safety pin shaft 2 is pushed to enable the safety pin shaft 2 to rotate, the safety switch 1 is driven to return to the first state clamping groove 111 from the second state clamping groove 112, and at the moment, the trigger handle 3 returns to a locking state under the action of the spring 5.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and additions can be made without departing from the method of the present invention, and these modifications and additions should also be regarded as the protection scope of the present invention.