CN209529235U - Firing lock and stapler - Google Patents
Firing lock and stapler Download PDFInfo
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- CN209529235U CN209529235U CN201822109774.4U CN201822109774U CN209529235U CN 209529235 U CN209529235 U CN 209529235U CN 201822109774 U CN201822109774 U CN 201822109774U CN 209529235 U CN209529235 U CN 209529235U
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- screw rod
- interconnecting piece
- spill spin
- stapler
- spin block
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Abstract
The utility model provides a kind of firing lock and stapler, including ejector pin component, the ejector pin component includes trigger shaft, interconnecting piece and the ejector pin bar set gradually from stapler proximate direction, interconnecting piece and ejector pin bar link, trigger shaft and interconnecting piece selectively link, and interconnecting piece has first state and the second state.Pass through the utility model, when nail anvil is not up to suitable position, interconnecting piece is in first state, and trigger shaft and interconnecting piece do not form linkage, even if holding operating handle, the mistakenly hit of stapler will not be caused to send out, when nail anvil is moved to suitable position relative to nail bin, interconnecting piece is in the second state, and trigger shaft and interconnecting piece link, at this time if holding operating handle, trigger shaft can push ejector pin bar to be fired by interconnecting piece；Therefore the utility model prevents the mistakenly hit hair when performing the operation unripe, improves the safety that instrument uses under the premise of guaranteeing that ejector pin bar works normally.
Description
Technical field
The utility model relates to the field of medical instrument technology, and in particular to a kind of firing lock and stapler.
Background technique
Disease of digestive tract is high-incidence one of the disease of the mankind, over the course for the treatment of, is often used circular-pipe anastomat and replaces doctor
Raw manual operations carries out the physiological tissues such as alimentary canal identical.Circular-pipe anastomat is a kind of common surgical operating instrument,
The inside bookbinding form of axis is mostly used greatly, end-to-end or end pair is formed to physiological tissues such as oesophagus, stomach, enteron aisles during operation
Side coincide, and two sections of tissues are containing when coincideing is contained in stapler, and circular anastomosis mouth, weight are organizationally formed after the completion of percussion
Body passageway is built.
In the prior art, circular-pipe anastomat includes stapler ontology, the operation handlebar for being flexibly connected the stapler ontology
Hand and nail-anvil assembly with the body fits.The stapler ontology includes the nail bin groupware set on distal end, the nail bin
Component includes annular nail bin, cutter；And the knob set on body proximal end, the knob can be rotated relative to ontology, the kiss
The inside of clutch ontology further includes proximally to the nail anvil shaft of distal end setting.It is proximally and distally for operator herein
, it be proximal end apart from the closer one end of operator apart from the farther away one end of operator is remote closer to one end of surgery location
End.In stapler, inner and outer is opposite with for the axle center of stapler, and the side close to axle center is inside, separate
The side in axle center is outside.The nail-anvil assembly includes nail anvil, the nail-anvil hat that nail anvil distal end is arranged in and is arranged inside nail anvil
Knife anvil, nail-anvil assembly can be directly connected to the distal end of nail anvil shaft or be connect by nail anvil shaft coupling piece.In tumor operation mistake
Cheng Zhong, after detachment removes tumor tissues, nail anvil shaft is pierced by from the pocket of stump tissue, is configured at the distal end of stapler ontology, is revolved
Rotate button, after so that the distance between nail-anvil assembly and nail bin is gradually reduced and is reached a suitable distance, reach can cock,
Operating handle percussion instrument could be held to complete to coincide.With the continuous development of medical instrument, circular-pipe anastomat is also increasingly
It is widely used in the treatment of the diseases such as hemorrhoid.
As described above, before firing stapler, requiring to revolve either in tumor operation or in the iatrotechnics of hemorrhoid
Rotating button makes the distance between nail-anvil assembly and nail bin reach suitable distance.However, actually using circular-pipe anastomat into
When row operation, operator may the distance between nail-anvil assembly and nail bin when being not up to suitable position, accidentally hold behaviour
Mistakenly hit is caused to send out as handle, so as to cause operative failure, in some instances it may even be possible to lead to the generation of malpractice.
Utility model content
For the problems of the prior art, the purpose of this utility model is to provide a kind of firing locks and tubular type to coincide
Device, when the distance between nail-anvil assembly and nail bin is not up to suitable position, even if holding operating handle, trigger shaft can not also be pushed away
Dynamic ejector pin bar, without will cause mistakenly hit hair.
The utility model embodiment provides a kind of firing lock, is used for stapler, and the firing lock includes ejector pin component,
The ejector pin component includes trigger shaft, interconnecting piece and the ejector pin bar set gradually from stapler proximate direction, institute
It states interconnecting piece and the ejector pin bar links, and the interconnecting piece has first state and the second state；
When the interconnecting piece is in the first state, the trigger shaft does not link with the interconnecting piece, the stapler
It can not fire；When the interconnecting piece is in second state, the trigger shaft and the interconnecting piece link, and the stapler can
With percussion.
Optionally, the interconnecting piece includes an at least spill spin block, and the distal end of the spill spin block is pivotably coupled to described
The proximal end of ejector pin bar；
When the interconnecting piece is in first state, the proximal end of the spill spin block is opened outward；The interconnecting piece is in institute
When stating the second state, the proximal end of the spill spin block is collapsed inwardly.
It optionally, further include the screw rod for being arranged in the ejector pin component internal, the screw rod includes the first screw rod portion and the
Two screw rod portions, second screw rod portion is located at the distal end in first screw rod portion, and the outer diameter in second screw rod portion is less than institute
State the outer diameter in the first screw rod portion；
When the distal end of the spill spin block is located at the first screw rod portion, the proximal end of the spill spin block is opened outward；It is described
When the distal end of spill spin block is located at the second screw rod portion, the proximal end of the spill spin block is collapsed inwardly.
Optionally, the inner wall of the distal end of the spill spin block is provided with boss, when the interconnecting piece is in the first state,
The boss of the spill spin block and first screw rod portion contradict.
Optionally, the proximal end of the ejector pin bar is provided with and the one-to-one mounting groove of the spill spin block, the spill spin block
Distal end be rotatably mounted in the mounting groove by a rotary shaft.
Optionally, torsional spring is additionally provided in the rotary shaft, when the distal end of the spill spin block is located at the first screw rod portion,
The torsional spring is deformed, and when the distal end of the spill spin block is detached from the first screw rod portion, the recoverable force power of the torsional spring makes
It is collapsed inwardly relative to the screw rod distal end for obtaining the spill spin block.
Optionally, the boss end of the spill spin block is provided with the first lead-in chamfered, the distal end position of the spill spin block
When the first screw rod portion, first lead-in chamfered of the boss end and first screw rod portion are contradicted.
Optionally, screw rod interconnecting piece, the screw rod are additionally provided between first screw rod portion and second screw rod portion
The outer surface of interconnecting piece is transition face.
Optionally, there are two the spill spin block, described two spill spin blocks are oppositely arranged for the proximal end setting of the ejector pin bar.
Optionally, the distal end setting of the trigger shaft is there are two opposite percussion portion, the percussion portion respectively with collapsing when
Described two spill spin blocks proximal end it is axially corresponding.
Optionally, the firing lock further includes the screw rod for being arranged in the ejector pin component internal, and the trigger shaft also wraps
The trigger shaft interconnecting piece between described two percussion portions is included, the inner surface of the trigger shaft interconnecting piece is formed as relative to the silk
The outer surface of the cambered surface that bar is recessed outward, the cambered surface and the screw rod is adapted.
Optionally, the stapler further includes operating handle, and the operating handle can drive the trigger shaft from the kiss
The proximate direction of clutch is mobile.
The utility model embodiment also provides a kind of stapler, including the firing lock.
Firing lock and anastomosis apparatus provided by the utility model have the advantage that
The utility model provides a kind of firing lock for stapler, when nail-anvil assembly is not up to suitable position,
Interconnecting piece is in first state, and trigger shaft and interconnecting piece do not form linkage, even if holding operating handle, trigger shaft can not also be pushed
Ejector pin bar will not cause the mistakenly hit of stapler to send out, when nail-anvil assembly is moved to suitable position relative to nail bin, at interconnecting piece
In the second state, trigger shaft and interconnecting piece link, and at this time if holding operating handle, trigger shaft can be pushed away by interconnecting piece
Nail rod is fired；Therefore the utility model prevents under the premise of guaranteeing that ejector pin bar works normally when performing the operation unripe
Mistakenly hit hair, improve the safety that instrument uses.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon.
Fig. 1 is the structural schematic diagram of the stapler of an embodiment of the present invention；
Fig. 2 is that the stapler of an embodiment of the present invention removes the schematic diagram of a side body；
Fig. 3 is the pointer of an embodiment of the present invention and the schematic diagram of pulling-on piece cooperation；
Fig. 4 is that the stapler of an embodiment of the present invention is in fail-safe mode, ejector pin bar and screw rod mating part
Structural schematic diagram；
Fig. 5 is that the stapler of an embodiment of the present invention is in fail-safe mode, ejector pin bar and screw rod mating part
Explosive view；
Fig. 6 is that the stapler of an embodiment of the present invention is in fail-safe mode, ejector pin bar and screw rod mating part
Bottom view；
Fig. 7 is the cross-sectional view in the direction A1-A1 in Fig. 6；
Fig. 8 is that the stapler of an embodiment of the present invention is in and can fire mode, ejector pin bar and screw rod mating part
Structural schematic diagram；
Fig. 9 is that the stapler of an embodiment of the present invention is in and can fire mode, ejector pin bar and screw rod mating part
Bottom view；
Figure 10 is the cross-sectional view in the direction A2-A2 in Fig. 9.
Appended drawing reference:
11 stapler ontology shell, 4 trigger shaft
The distal end of 12 nail bin groupware, 41 trigger shaft
The proximal end of 13 nail-anvil assembly, 42 trigger shaft
2 ejector pin bar, 43 trigger shaft interconnecting piece
51 knob of proximal end of 21 ejector pin bars
3 spill spin block, 52 pulling-on piece
53 pointer of distal end of 31 rotating arms
311 rotary shaft, 6 screw rod
312 torsional spring, 61 first screw rod portion
313 boss, 62 second screw rod portion
314 first lead-in chamfered, 63 screw rod interconnecting piece
7 handle of proximal end of 32 rotating arms
321 cavitys
Specific embodiment
Example embodiment is more specifically described with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that this is practical new
Type will be full and complete, and the design of example embodiment is comprehensively communicated to those skilled in the art.It is identical in figure
Appended drawing reference indicate same or similar structure, thus repetition thereof will be omitted.
The technical issues of in order to solve in the prior art, the utility model provide a kind of percussion lock for stapler
Structure, the firing lock includes ejector pin component, and a screw rod is equipped in ejector pin component.The ejector pin component includes from stapler
Trigger shaft, interconnecting piece and the ejector pin bar that proximate direction is set gradually, the interconnecting piece and the ejector pin bar link, described
Interconnecting piece optionally links with the trigger shaft.Specifically, the interconnecting piece has first state and the second state；It is described
When interconnecting piece is in first state, the trigger shaft does not link with interconnecting piece, and the movement of trigger shaft cannot be transferred to by interconnecting piece
Ejector pin bar, the stapler can not fire；When the interconnecting piece is in the second state, the trigger shaft and interconnecting piece link, even
The movement of trigger shaft can be transferred to ejector pin bar by socket part, and the stapler can fire.
Therefore, by the way that ejector pin component is divided into three parts, interconnecting piece optionally joins the utility model with trigger shaft
It is dynamic.When distance between nail-anvil assembly and nail bin is not up to suitable position, interconnecting piece is in first state, trigger shaft with connect
Portion does not form linkage, not will cause the mistakenly hit hair of nail bin groupware, when nail-anvil assembly is moved to suitable position relative to nail bin, even
Socket part is in the second state, and trigger shaft and interconnecting piece form linkage, at this time if holding operating handle, can carry out stapler
Percussion.
In an embodiment of the utility model, the interconnecting piece includes an at least spill spin block, and the distal end of the spill spin block can
It is rotatingly connected to the proximal end of ejector pin bar；When the interconnecting piece is in first state, the proximal end of the spill spin block is opened outward,
To form a cavity between spill spin block and screw rod；When the interconnecting piece is in the second state, the proximal end of the spill spin block to
Inside is collapsed, hence into trigger shaft proximally to the path of distal end movement.It opens outward herein, refers to the close of spill spin block
It holds to the direction far from screw rod and opens, collapse refer to that the proximal end of spill spin block is collapsed to the direction close to screw rod inwardly.
In this embodiment, the screw rod includes the first screw rod portion and the second screw rod portion, and second screw rod portion is located at the
The distal end in one screw rod portion, and the outer diameter in second screw rod portion is less than the outer diameter in the first screw rod portion；The distal end position of the spill spin block
When the first screw rod portion, the proximal end of the spill spin block is opened outward；When the distal end of the spill spin block is located at the second screw rod portion, institute
It collapses inwardly the proximal end for stating spill spin block.
In the initial shape that nail-anvil assembly has just docked successful original state with stapler ontology or tissue has just been included in
Under state, the distal end of the spill spin block is contradicted with the first screw rod portion, and the proximal end of the spill spin block is opened outward relative to screw rod,
A cavity is formed between spill spin block and screw rod, when the trigger shaft is mobile from the proximate direction of stapler, into rotation
Cavity between the proximal end and screw rod of switch block.Therefore trigger shaft and spill spin block do not link, even if operator is accidentally at this time
It presses handle and pushes trigger shaft, the percussion of stapler will not be caused, to avoid being not ready to mistakenly hit hair when completing in operation.
In operation preparation process, need mobile screw rod mobile to the proximal direction of stapler, screw rod is moved to the rotation
When the distal end of switch block is located at the second screw rod portion, outer diameter due to the outer diameter in the second screw rod portion less than the first screw rod portion, the rotation
The proximal end of block is collapsed inwardly relative to screw rod, and described when the trigger shaft is mobile from the proximate direction of stapler
It links after spill spin block contact with spill spin block.At this time if operator presses handle and pushes trigger shaft, trigger shaft, rotation are passed sequentially through
Block and pushing slice of nail fire stapler, to realize the normal function of stapler.
The structure of the stapler of the utility model is discussed in detail with reference to the accompanying drawing.Wherein, in Fig. 4~Figure 10, in order to
All parts are clearly shown, a part of screw rod has only been intercepted, to show by the structure of screw rod shield portions.
It as depicted in figs. 1 and 2, is the structure of the stapler of an embodiment of the present invention, wherein in order to more clearly show
Side stapler shell is removed in Fig. 2, and nail bin groupware is separated with stapler ontology by the structure inside stapler out
It shows.Wherein, stapler includes stapler ontology and nail-anvil assembly 13, and stapler ontology includes stapler shell 11 and is located at kiss
The nail bin groupware 12 of the distal end of clutch shell 11, nail bin groupware 12 include annular nail bin, pushing slice of nail and cutter, nail bin groupware 12
Proximal end is provided with ejector pin component.Nail-anvil assembly 11 includes nail anvil shaft and the nail anvil for being set to nail anvil shaft distal end.Nail anvil shaft can band
Dynamic nail anvil is moved along the axial direction of nail anvil shaft, so that nail anvil is moved towards the direction close to or far from nail bin groupware 12
It is dynamic.
It is proximally and distally for operator in the utility model, is close apart from the closer one end of operator
End is distal end closer to one end of surgery location apart from the farther away one end of operator.I.e. in this embodiment, operator makes
Used time is to hold handle operation stapler, and in the visual angle of Fig. 1 and Fig. 2, the one end for being biased to right side is proximal end, is biased to left side
One end is distal end.For example, the proximal end of ejector pin component is the distal end deviation right side relative to ejector pin component for ejector pin component
One end, for example, for screw rod 6, the proximal end of screw rod 6 is one end that right side is biased to relative to the distal end of screw rod 6.
In this embodiment, the stapler further includes the operating handle 7 for being pivotally connected the stapler ontology, the behaviour
The distal end for making handle 7 is corresponding with the proximal end of ejector pin component, and the spinning movement of operating handle 7 towards stapler ontology can drive
The ejector pin component is mobile from the proximate direction of stapler.
The proximal end of stapler ontology is further provided with knob 51, and knob 51 is close with nail anvil shaft by screw component 6
End is connected.When the knob 51 rotates, drive the nail anvil shaft axial relative to the stapler ontology by the screw rod 6
It is mobile.
The structure of circular-pipe anastomat shown in Fig. 1~2 is merely illustrative, in practical applications, circular-pipe anastomat
Structure is not limited to structure shown in figure, can also use other forms, can be realized the percussion of stapler, belong to this
Within the protection scope of utility model.
As shown in figure 3, further, in this embodiment, the stapler ontology further includes being located at the stapler sheet
The pointer 53 and pulling-on piece 52 of the inside of body, the proximal end of the pulling-on piece 52 are connected with the screw rod 6, can be with the movement of screw rod 6
And along the axial movement of screw rod.The distal end of the pulling-on piece 52 is opposite with the first end of the pointer 53, and the first of the pointer 53
End has first position region and second position region, and the first end of pointer 53 refers to the upper end of the pointer 53 in Fig. 3 herein.
Pointer 53 is pivotably secured on stapler shell 1, and when pointer 53 rotates, first end can be in first position region and second
It sets and is moved between region.
In this embodiment, when the knob 51 is rotated in a first direction, the screw rod 6 drive the pulling-on piece 52 to coincide
The proximal direction of device ontology is mobile, and the distal end of the pulling-on piece 52 pulls the first end of the pointer 53 to move from first position region
It moves to second position region.In practice, first position region is generally referred to as the initial Location Area of pointer 53, at this time nail bin
Farther out, not up to suitable position, therefore, first position region is also that can not fire for the distance between component 12 and nail-anvil assembly 11
Region, as knob 51 is along the rotation of first direction, nail anvil shaft pulls movement of the nail anvil to stapler, so that nail-anvil assembly and nail
The distance between storehouse component 12 reaches suitable position, and pointer 53 is also pulled to second position region by pulling-on piece 52 at this time, is at this time
Operator is allowed to fire stapler, therefore second position region also referred to as can fire zone.Therefore, pointer 53 can be used to make
It for the instruction of nail anvil shaft position, is used to refer to whether stapler has completed operation preparation, allows to fire.
The position instruction mode of nail anvil shaft is merely illustrative herein, and not as the limitation of the utility model.For example, nail anvil shaft
Position not necessarily use pointer 53 to be indicated, can also indicate whether nail-anvil assembly reaches and can hit using other modes
Position is sent out, or not by the way of visually indicating.
The utility model improves ejector pin component and screw rod.As shown in figure 4, for an embodiment of the present invention
The structural schematic diagram of ejector pin component and screw rod cooperation.Wherein, first screw rod portion 61 and screw rod 6 of the screw rod 6 including 6 proximal end of screw rod are remote
The second screw rod portion 62 at end, the outer diameter in second screw rod portion 62 is less than the outer diameter in the first screw rod portion 61, and screw rod 6 can be opposite
It is moved axially in stapler ontology.The outer cover of screw rod 6 is equipped with an ejector pin component, and the ejector pin component includes from stapler proximal end
The trigger shaft 4 that distally sets gradually, an at least spill spin block 3 and ejector pin bar 2, the distal end 31 of the spill spin block 3 are rotatable
Ground is connected to the proximal end 21 of ejector pin bar 2.Spill spin block 3 optionally links with trigger shaft 4.When spill spin block 3 and trigger shaft 4 link
When, when spill spin block 3 is mobile from stapler proximate direction, pushing slice of nail can be pushed to move together by ejector pin bar 2, will kissed
Nail bin and cutter are released in the nail bin groupware 12 of clutch body distal end, complete stapler percussion.The proximal end 42 of trigger shaft 4 can be with
Handle 7 links, when hold with a firm grip handle 7 when, handle 7 can push trigger shaft 4 mobile from the proximate direction of stapler.In order to
It avoids when nail-anvil assembly does not move to suitable position, stapler is sent out by mistakenly hit, and the utility model further increases failure and protects
Shield mode.
In this embodiment, spill spin block 3 has two pieces, and it is positioned opposite to each other in screw rod 6 radially, but this is practical new
Type is not limited, and the quantity for increasing or decreasing spill spin block 3 as needed is also possible, such as one piece of spill spin block 3 is only arranged,
Or setting four spill spin blocks 3 etc. outside screw rod 6, it belongs within the protection scope of the utility model.
As also shown in e.g. figs. 4-7, the schematic diagram of the circular-pipe anastomat of the embodiment in the initial state is shown, is justified at this time
Tube type anastomat is in fail-safe mode.Specifically, under original state, the spill spin block 3 is located at the first screw rod portion 61, described
The distal end 31 of spill spin block 3 and the first screw rod portion 61 contradict, and the proximal end 32 of the spill spin block 3 is opened outward relative to screw rod 6,
A cavity 321 is formed between spill spin block 3 and screw rod 6.If holding handle at this time, make the trigger shaft 4 from the proximal end of stapler
When distally moving, the distal end of trigger shaft 4 enters the cavity between the proximal end of spill spin block 3 and screw rod 6.Therefore trigger shaft 4
It does not link with spill spin block 3, even if operator accidentally presses the promotion trigger shaft 4 of handle 7 at this time, trigger shaft 4 can not be driven
Dynamic ejector pin bar 2 is mobile to distal end, will not lead to the percussion of stapler, to avoid being not ready to mistakenly hit when completing in operation
Hair.
As shown in figure 5, in this embodiment, the inner wall of the distal end 31 of the spill spin block 3 is provided with boss 313, initial shape
Under state, the boss 313 of the spill spin block 3 and first screw rod portion 61 are contradicted, the proximal end 32 of spill spin block 3 relative to screw rod 6 to
It opens in outside.In this embodiment, the proximal end 21 of the ejector pin bar 2 be provided with the one-to-one mounting groove of spill spin block 3, it is described
The distal end 31 of spill spin block 3 is rotatably mounted in mounting groove by a rotary shaft 311, and the boss 313 is located proximate to
The position of the proximal end of mounting groove, the i.e. right side of mounting groove shown in figure, without being limited by mounting groove.The rotary shaft 311
On be additionally provided with torsional spring 312, under original state, the torsional spring 312 is deformed, and the distal end 31 of the spill spin block 3 is located at second
When screw rod portion 62, the recoverable force power of the torsional spring 62 collapses the distal end 31 of spill spin block 3 inwardly relative to screw rod 6.
With the movement of screw rod 6 gradually proximally, stapler is gradually closed, and when reaching suitable position, spill spin block 3 is detached from
First screw rod portion 61.
As shown in figure 5,313 end of boss of the spill spin block 3 is provided with the first lead-in chamfered 314, under original state,
The first lead-in chamfered 314 and first screw rod portion 61 of 313 end of boss contradict.Under original state, due to spill spin block 3
Proximal end 32 rotate outward, boss 313 has certain tilt angle, if being not provided with the first lead-in chamfered 314, boss 313
End is point contact with the contact in the first screw rod portion 61, and passes through the first lead-in chamfered 314 of setting, in the initial state, boss
313 become face contact with the contact in the first screw rod portion 61, to increase between 313 end of boss and the first screw rod portion 61
Contact area improves the stability of stapler entirety under original state.
In this embodiment, it is additionally provided with screw rod interconnecting piece 63 between first screw rod portion 61 and the second screw rod portion 62,
The outer surface 63 of the screw rod interconnecting piece is transition face, for example, inclined-plane.
With two spill spin blocks 3 correspondingly, there are two opposite percussion portions for the setting of the distal end 41 of the trigger shaft 4, described
Percussion portion is axially corresponding with the proximal end of two spill spin blocks 3 when collapsing inwardly respectively, to receive inwardly in two spill spin blocks 3
It can link with spill spin block 3 when holding together.Cooperate to improve the structure of trigger shaft 4 and screw rod 6, the trigger shaft 4 further includes two
Trigger shaft interconnecting piece 43 between percussion portion, is formed as the cambered surface being recessed outward relative to screw rod, and the cambered surface is outer with screw rod 6
Surface is adapted.It is understood that when the outer surface of screw rod 6 is not cambered surface, the inner surface of the trigger shaft interconnecting piece 43
It is also that non-cambered surface adaptable therewith makes to kiss so that the trigger shaft 4 in distal movement, can be supported and be oriented to
The percussion of clutch is more stable.
As Fig. 8~10 show the circular-pipe anastomat in the utility model, nail-anvil assembly and nail bin groupware reach during surgery
Structural schematic diagram when to suitable position, stapler, which is in, at this time can normally fire mode.When performing the operation preparation, operator's rotation
The knob 51 of proximal end drives screw rod 6 mobile to the proximal end of stapler, and the distal end 31 that screw rod 6 is moved to the spill spin block 3 is located at the
When two screw rod portions 62, outer diameter due to the outer diameter in the second screw rod portion 62 less than the first screw rod portion 61, the proximal end 32 of the spill spin block 3
By torsional spring 312 reset force and collapsed inwardly relative to screw rod 6, to be at least partially into trigger shaft 4 proximally to remote
Hold mobile path.When holding the percussion stapler of handle 7, the trigger shaft 4 is mobile from the proximate of stapler, percussion
Bar 4 and spill spin block 3 link.Wherein, when the distal end movement of spill spin block 3 is located relatively at the second screw rod portion 62 during percussion, rotation
The distal end 31 of block 3 can be contradicted with the second screw rod portion 62, can also vacantly be designed, i.e. the outer diameter in the second screw rod portion 62 can design
Must be smaller, it can be realized the purpose for collapsing the proximal end 32 of spill spin block 3 inwardly.Preferably, the proximal end of the surfaces of revolution with
The distal end of the trigger shaft be end end offset, and, when supporting, the supporting surface vertically with the axis direction, to prevent
When percussion, the mutual guiding role of non-perpendicular supporting surface is to cause percussion force when coincideing to increase.
When using pointer 53 as the position instruction of nail-anvil assembly in stapler, when pointer 53 is located at first position region
When, the distal end 31 of spill spin block 3 and outer diameter biggish first screw rod portion 61 contradict, the proximal end 32 of spill spin block 3 open outward without
It links with trigger shaft 4, stapler is in fail-safe mode, even if holding handle 7 at this time, will not fire stapler.Work as finger
When needle 53 is pulled by pulling-on piece 52 and enters second position region, the distal end 31 of spill spin block 3 is located at outer diameter lesser first at this time
The proximal end 32 of bar portion 62, spill spin block 3 collapses inwardly and links with trigger shaft 4, and stapler, which is in, normally to fire mode, at this time
If holding handle 7, stapler can be normally fired.
Firing lock and anastomosis apparatus provided by the utility model have the advantage that
The utility model provides a kind of firing lock for stapler, when nail-anvil assembly is not up to suitable position,
Interconnecting piece is in first state, and trigger shaft and interconnecting piece do not form linkage, even if holding operating handle, trigger shaft can not also be pushed
Ejector pin bar will not cause the mistakenly hit of stapler to send out, when nail-anvil assembly is moved to suitable position relative to nail bin, at interconnecting piece
In the second state, trigger shaft and interconnecting piece link, and at this time if holding operating handle, trigger shaft can be pushed away by interconnecting piece
Nail rod is fired；Therefore the utility model prevents under the premise of guaranteeing that ejector pin bar works normally when performing the operation unripe
Mistakenly hit hair, improve the safety that instrument uses.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (13)
1. a kind of firing lock, which is characterized in that be used for stapler, the firing lock includes ejector pin component, the ejector pin group
Part includes trigger shaft, interconnecting piece and the ejector pin bar set gradually from the proximate direction of the stapler, the interconnecting piece
It links with the ejector pin bar, and the interconnecting piece has first state and the second state；
When the interconnecting piece is in the first state, the trigger shaft does not link with the interconnecting piece, and the stapler can not
Percussion；When the interconnecting piece is in second state, the trigger shaft and the interconnecting piece link, and the stapler can be hit
Hair.
2. firing lock according to claim 1, which is characterized in that the interconnecting piece includes an at least spill spin block, described
The distal end of spill spin block is pivotably coupled to the proximal end of the ejector pin bar；
When the interconnecting piece is in first state, the proximal end of the spill spin block is opened outward；The interconnecting piece is in described the
When two-state, the proximal end of the spill spin block is collapsed inwardly.
3. firing lock according to claim 2, which is characterized in that further include the silk for being arranged in the ejector pin component internal
Bar, the screw rod include the first screw rod portion and the second screw rod portion, and second screw rod portion is located at the distal end in first screw rod portion,
And the outer diameter in second screw rod portion is less than the outer diameter in first screw rod portion；
When the distal end of the spill spin block is located at the first screw rod portion, the proximal end of the spill spin block is opened outward；The rotation
When the distal end of block is located at the second screw rod portion, the proximal end of the spill spin block is collapsed inwardly.
4. firing lock according to claim 3, which is characterized in that the inner wall of the distal end of the spill spin block is provided with convex
Platform, when the interconnecting piece is in the first state, the boss of the spill spin block and first screw rod portion are contradicted.
5. firing lock according to claim 4, which is characterized in that the proximal end of the ejector pin bar is provided with and the rotation
The distal end of the one-to-one mounting groove of block, the spill spin block is rotatably mounted in the mounting groove by a rotary shaft.
6. firing lock according to claim 5, which is characterized in that be additionally provided with torsional spring, the rotation in the rotary shaft
When the distal end of switch block is located at the first screw rod portion, the torsional spring is deformed, and the distal end of the spill spin block is detached from described first
When screw rod portion, the recoverable force power of the torsional spring collapses the distal end of the spill spin block inwardly relative to the screw rod.
7. firing lock according to claim 4, which is characterized in that the end of the boss of the spill spin block is provided with
First lead-in chamfered, when the distal end of the spill spin block is located at the first screw rod portion, first guidance of the boss end
Inclined-plane and first screw rod portion contradict.
8. firing lock according to claim 3, which is characterized in that first screw rod portion and second screw rod portion it
Between be additionally provided with screw rod interconnecting piece, the outer surface of the screw rod interconnecting piece is transition face.
9. firing lock according to claim 2, which is characterized in that there are two the rotations for the proximal end setting of the ejector pin bar
Switch block, described two spill spin blocks are oppositely arranged.
10. firing lock according to claim 9, which is characterized in that there are two opposite for the distal end setting of the trigger shaft
Percussion portion, the percussion portion respectively with collapse when described two spill spin blocks proximal end it is axially corresponding.
11. firing lock according to claim 10, which is characterized in that the firing lock further includes being arranged in described push away
Screw rod inside screw assembly, the trigger shaft further include the trigger shaft interconnecting piece between two percussion portions, the trigger shaft
The inner surface of interconnecting piece is formed as the cambered surface being recessed outward relative to the screw rod, the outer surface phase of the cambered surface and the screw rod
It adapts to.
12. firing lock according to claim 1, which is characterized in that the stapler further includes operating handle, the behaviour
Making handle can drive the trigger shaft mobile from the proximate direction of the stapler.
13. a kind of stapler, which is characterized in that including firing lock described in any one of claims 1 to 12.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822109774.4U CN209529235U (en) | 2018-12-14 | 2018-12-14 | Firing lock and stapler |
| DE212019000464.4U DE212019000464U1 (en) | 2018-12-14 | 2019-12-13 | Trigger mechanism and stapler |
| BR212021010790-3U BR212021010790Y1 (en) | 2018-12-14 | 2019-12-13 | TRIGGER MECHANISM AND STAPLER |
| PCT/CN2019/125257 WO2020119794A1 (en) | 2018-12-14 | 2019-12-13 | Firing mechanism and stapler |
| JP2021600094U JP3235225U (en) | 2018-12-14 | 2019-12-13 | Inspired mechanism and stapler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822109774.4U CN209529235U (en) | 2018-12-14 | 2018-12-14 | Firing lock and stapler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209529235U true CN209529235U (en) | 2019-10-25 |
Family
ID=68264656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822109774.4U Active CN209529235U (en) | 2018-12-14 | 2018-12-14 | Firing lock and stapler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209529235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020119794A1 (en) * | 2018-12-14 | 2020-06-18 | 天臣国际医疗科技股份有限公司 | Firing mechanism and stapler |
-
2018
- 2018-12-14 CN CN201822109774.4U patent/CN209529235U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020119794A1 (en) * | 2018-12-14 | 2020-06-18 | 天臣国际医疗科技股份有限公司 | Firing mechanism and stapler |
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Address after: 215021 No. 278 Dongping Street, Suzhou Industrial Park, Jiangsu Province Patentee after: Tianchen International Medical Technology Co., Ltd Address before: 215123 No. 278 Dongping Street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: TOUCHSTONE INTERNATIONAL MEDICAL SCIENCE Co.,Ltd. |
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