CN113243942B - Mode-adjustable biopsy system - Google Patents
Mode-adjustable biopsy system Download PDFInfo
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- CN113243942B CN113243942B CN202110486188.5A CN202110486188A CN113243942B CN 113243942 B CN113243942 B CN 113243942B CN 202110486188 A CN202110486188 A CN 202110486188A CN 113243942 B CN113243942 B CN 113243942B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
- A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0283—Pointed or sharp biopsy instruments with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe
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Abstract
The invention discloses a mode-adjustable biopsy system, which comprises a biopsy handle and a negative pressure system, wherein the biopsy handle is internally provided with a motion mode switching mechanism, a first trigger structure for starting the negative pressure system after being triggered and a second trigger structure for closing the negative pressure system after being triggered; the position of the first trigger structure corresponds to the first position; the position of the second trigger structure corresponds to the second position; when the stirring piece is stirred to the first position, the inner cutter advances and retreats and rotates, the first trigger structure is triggered, and the negative pressure system is started; when the stirring piece is stirred to the second position, the inner cutter advances and retreats but does not rotate, the second trigger structure is triggered, and the negative pressure system is closed. In the invention, the switching between the sampling mode and the positioning mode can be completed only by directly or indirectly stirring the stirring piece, and the operation is more convenient.
Description
Technical Field
The invention relates to a medical instrument, in particular to a mode-adjustable biopsy system.
Background
Most of the existing biopsy systems only have a sampling mode, namely, after a biopsy needle is punctured in place, rotary cutting of tissues is directly carried out, and the cut tissues are sucked by using negative pressure; when the biopsy needle is punctured in place, a doctor can enter the positioning mode in order to determine whether the position of a sampling window corresponds to the position of a focus, suction is not carried out under negative pressure in the positioning mode, an inner knife only moves forwards and backwards without rotation, the doctor observes whether the sampling window is correct or not through B-ultrasonic and does not cut normal tissues by mistake, the sampling mode is selected after the doctor determines that the sampling window is in place, the negative pressure is opened in the mode, the inner knife moves forwards and backwards and carries out rotary cutting, and the focus tissues can be taken out.
At present, when the sampling mode and the positioning mode are switched, corresponding buttons or structures are required to be respectively operated for switching the action of the inner knife and switching the negative pressure, the operation is not convenient, and in the existing biopsy system, the situation that the negative pressure state is switched by misoperation without switching the action mode of the inner knife may occur, so that the reliability in the operation process is not facilitated.
Disclosure of Invention
The invention mainly aims to provide a biopsy system with adjustable modes, so as to improve the operation convenience and improve the reliability of a surgical process.
In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
a mode adjustable biopsy system comprising a biopsy needle, a biopsy handle, and a negative pressure system, the biopsy handle comprising a housing, the biopsy handle further comprising:
the transmission mechanism is provided with a rotary cutting transmission line for driving an inner knife of the biopsy needle to rotate and a forward and backward transmission line for driving the inner knife to advance and retreat;
the rotary cutting device comprises a rotary cutting transmission line, a motion mode switching mechanism and a control mechanism, wherein the motion mode switching mechanism comprises a shifting piece, the stroke position of the shifting piece comprises a first position and a second position, and the shifting piece cuts off or is connected with the rotary cutting transmission line by changing the stroke position;
the first trigger structure is used for starting the negative pressure system after being triggered, and the position of the first trigger structure corresponds to the first position;
the second trigger structure is used for closing the negative pressure system after being triggered; the position of the second trigger structure corresponds to the second position;
when the poking piece is poked to the first position, the rotary cutting transmission line is connected, the poking piece triggers the first triggering structure, and the negative pressure system is started; when the stirring piece is stirred to the second position, the rotary cutting transmission line is cut off, the stirring piece triggers the second triggering structure, and the negative pressure system is closed. Optionally, the mode-adjustable biopsy system may further include a driving mechanism including a driving shaft and a sliding member disposed on the driving shaft, wherein the sliding member slides along the driving shaft to cut off or connect the rotational-cut driving path by moving the toggle member.
Optionally, the motion mode switching mechanism is a self-locking switching mechanism, and when the toggle member is toggled to the first position or the second position, the toggle member is self-locked at the first position or the second position.
Optionally, the motion mode switching mechanism further includes:
the screw rod is parallel to the transmission shaft, and the poking piece is integrally arranged on the screw rod and moves along with the screw rod;
the axial position of the toggle gear is fixed, the toggle gear is sleeved on the screw rod, the toggle gear is in threaded fit with the screw rod, and an avoidance window for exposing the toggle gear is arranged on the shell;
when the switching is performed, the toggle gear is toggled, so that the screw drives the toggle piece to move from the first position to the second position or from the second position to the first position, and the first trigger structure or the second trigger structure is triggered.
Optionally, the transmission mechanism or the housing is provided with a first limiting structure for limiting a limit stroke position of the toggle member, and the first position and the second position are both the limit stroke positions of the toggle member.
Optionally, the sliding part is mounted on the transmission shaft through a pin shaft, the pin shaft penetrates through the transmission shaft along the radial direction of the transmission shaft, a guide mounting groove for the pin shaft to penetrate through is formed in the sliding part, the guide mounting groove is a U-shaped groove, the width of the guide mounting groove is matched with that of the pin shaft, and a long edge of the guide mounting groove extends along the axial direction of the transmission shaft, so that the pin shaft can move in the guide mounting groove along the axial direction of the transmission shaft; when the pin shaft is positioned at one end of the guide mounting groove, the toggle piece is positioned at the first position; when the pin shaft is positioned at the other end of the guide mounting groove, the stirring piece is positioned at the second position;
and/or
The transmission shaft is characterized in that a first limiting surface and a second limiting surface are arranged on the shell, the first limiting surface, the poking piece and the second limiting surface are sequentially arranged along the axial direction of the transmission shaft, the first trigger structure is arranged on the first limiting surface, and the second trigger structure is arranged on the second limiting surface.
Optionally, the movement mode switching mechanism further includes:
the first self-locking structure is used for self-adaptively locking the shifting piece at the first position when the shifting piece is shifted to the first position;
the second self-locking structure is used for self-adaptively locking the shifting piece at the second position when the shifting piece is shifted to the second position;
the shell is provided with a second operation window for exposing the poking piece to form an operation part.
Optionally, a second limiting structure for limiting the stroke position of the toggle piece is arranged between the toggle piece and the shell;
the second operation window is a U-shaped groove, when the toggle piece is positioned at one end of the second operation window, the toggle piece is positioned at the first position, and when the toggle piece is positioned at the other end of the second operation window, the toggle piece is positioned at the second position.
Optionally, the first self-locking structure and the second self-locking structure both include:
the locking device comprises a guide groove, a locking pin movably arranged in the guide groove, a locking groove for the locking pin to be clamped in, and an elastic piece for driving the locking pin to move towards the side where the locking groove is located, wherein a third limiting structure for preventing the locking pin from being separated from the guide groove is arranged in the guide groove,
the locking groove is arranged on the shifting piece, the number of the guide grooves is at least two, the guide grooves are distributed beside a stroke path of the shifting piece, and the guide grooves corresponding to the first self-locking structure and the second self-locking structure are arranged on the shell; or the guide groove is arranged on the shifting piece, the number of the locking grooves is at least two, the locking grooves are distributed beside the stroke path of the shifting piece, and the locking grooves corresponding to the first self-locking structure and the second self-locking structure are arranged on the shell.
Optionally, the sliding member is a friction disc, a second gear coaxial with the inner cutter and a rotary cutting gear for driving the second gear to rotate are further disposed on the rotary cutting transmission line, the rotary cutting gear is rotatably disposed on the transmission shaft, and an axial position of the rotary cutting gear is fixed; the friction disc is integrated with the rotary-cut gear or separated from the rotary-cut gear by moving along the axial direction of the transmission shaft;
or
The sliding piece is a rotary cutting gear, and a first guide torque transmission structure is arranged between the rotary cutting gear and the transmission shaft, wherein the rotary cutting gear moves along the axial direction of the transmission shaft, so that the first guide torque transmission structure is effective or ineffective.
Optionally, when the sliding member is a friction disc, a return spring for driving the friction disc to slide and return to the direction of the rotary cutting gear is further disposed on the transmission shaft, and the return spring is sleeved outside the transmission shaft.
The biopsy system can avoid the condition that the state of the negative pressure system is switched when the action of the inner knife is not switched in place, is favorable for improving the reliability of the operation process, can realize the switching of the action mode of the inner knife or the opening and closing of the negative pressure system by changing the stroke position of the stirring piece, can complete the switching of the sampling mode and the positioning mode only by directly or indirectly stirring the stirring piece during operation, and is more convenient and fast to operate.
Drawings
FIG. 1 is a schematic view of an exemplary external configuration of a biopsy handle of the present invention;
FIG. 2 shows a schematic view of the internal structure of a partial region of the biopsy handle of FIG. 1 (the slide is a friction disk);
FIG. 3 shows an exemplary schematic of the transmission mechanism in the biopsy handle of the present invention (the slide is a friction disk);
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2 (with the second transmission line in a connected state);
FIG. 5 is a schematic illustration of the cross-sectional view of FIG. 4 when the second transmission line is switched to an off state;
fig. 6 is a schematic view showing an exemplary partial structure of the transmission mechanism when the slider is a rotary cut gear (the second transmission line is in a connected state);
FIG. 7 is a schematic illustration of the fragmentary structural view of FIG. 6 with the second drive line disconnected;
FIG. 8 is an enlarged view taken at I of FIG. 2;
FIG. 9 is an enlarged view taken at II of FIG. 1;
FIG. 10 is a schematic view of another exemplary external configuration of a biopsy handle of the present invention;
FIG. 11 is a schematic view of the internal structure of the biopsy handle of FIG. 10;
FIG. 12 is a sectional view taken along line F-F in FIG. 11;
FIG. 13 is a schematic view of the toggle member of FIG. 11;
FIG. 14 is a cross-sectional view taken along line B-B of FIG. 11 (with the toggle member in the first position);
FIG. 15 is a schematic view of the toggle member shown in FIG. 14 being moved between a first position and a second position;
FIG. 16 is a schematic view of the toggle member of FIG. 14 shown in a position adjacent to a second position;
FIG. 17 is a schematic view of the toggle member of FIG. 14 in a second position;
fig. 18 is an enlarged view of a portion of fig. 10 at iii.
The description of reference numerals in the examples includes:
the device comprises a shell 100, an avoidance window 101, a guide groove 102 and a second operation window 103;
a knife tube 200, an inner knife 300, a driving element 400;
the device comprises a transmission mechanism 500, a transmission shaft 501, a transmission sleeve 502, a return spring 503, an advance and retreat gear 511, a first gear 512, a rotary cutting gear 521, a second gear 522, a friction disc 523, a pin 524, a guide mounting groove 523a and a ring groove 503;
the mode switching mechanism 600, the toggle member 610, the locking groove 611, the screw 620, the toggle gear 630, the first self-locking structure 640, the second self-locking structure 650, the locking pin 641 and the elastic member 651;
a first trigger structure 701 and a second trigger structure 702.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
Referring to fig. 1 to 18 in combination, the mode-adjustable biopsy system of the present invention includes a biopsy needle, a biopsy handle, and a negative pressure system, wherein the biopsy needle includes a knife tube 200 provided with a sampling window and an inner knife 300 for cutting tissue, the movable handle includes a housing 100, a transmission mechanism 500 and a motion mode switching mechanism, the negative pressure system is used for sucking tissue cut by the inner knife 300, the transmission mechanism 500 has a rotary cutting transmission line for driving the inner knife 300 to rotate and a forward and backward transmission line for driving the inner knife to advance and retreat, and the rotary cutting transmission line and the forward and backward transmission line share a driving element 400; the movement mode switching mechanism 600 comprises a toggle member 610, the stroke position of the toggle member 610 comprises a first position and a second position, the toggle member 610 cuts off or connects a rotary cutting transmission line by changing the stroke position, a first trigger structure 701 and a second trigger structure 702 are further arranged in the housing 100, the first trigger structure 701 is used for starting a negative pressure system after being triggered, and the second trigger structure 702 is used for closing the negative pressure system after being triggered; the position of the first trigger structure 701 corresponds to a first position, and the position of the second trigger structure 702 corresponds to a first position.
When the toggle member 610 is toggled to the first position, the rotary cutting transmission line is switched to the connection state, the motion state of the inner cutter 300 is switched to advance and retreat and rotate, and the toggle member 610 triggers the first trigger structure 701, so that the negative pressure system is opened; when the toggle member 610 is toggled to the second position, the rotary cutting transmission line is switched to the off state, the moving state of the inner cutter 300 is switched to only advance and retreat but not rotate, the toggle member 610 triggers the second trigger structure 702, and the negative pressure system is closed.
In an actual implementation process, the first triggering structure 701 and the second triggering structure 702 may adopt a tact switch, a pressure sensor, a distance sensor, or the structures in fig. 14 to 16, that is, the first elastic piece and the second elastic piece are arranged to realize triggering of the first triggering structure and the second triggering structure by connecting or disconnecting the first elastic piece and the second elastic piece.
According to the biopsy system, the switching of the inner knife action mode and the opening and closing of the negative pressure system can be realized by changing the stroke position of the stirring piece 610, during operation, the sampling mode and the positioning mode can be switched only by directly or indirectly stirring the stirring piece 610, the operation is more convenient, the inner knife rotates, advances and retreats by using the same driving element, and compared with the mode that the inner knife in the existing handle rotates, advances and retreats by using the respective driving element, the number of the driving elements is reduced, the dead weight of the handle is favorably reduced, the operation is more convenient, and the operation reliability is favorably improved.
In some embodiments, referring to fig. 2 to 7 and fig. 11, the biopsy handle further comprises a transmission mechanism 500 for transmitting power conversion to the inner knife 300, the transmission mechanism 500 comprises a transmission shaft 501 and a sliding member arranged on the transmission shaft, the toggle member 610 switches the action mode of the inner knife 300 by toggling the sliding member to slide along the transmission shaft, and the sliding member is provided with a ring groove 503 for the toggle member 610 to be embedded. In practical implementation, the sliding member may be the rotary cut gear 521 shown in fig. 3 to 5, or may be the friction disc 523 shown in fig. 6 and 7.
When the mode needs to be switched, the toggle element 610 is directly or indirectly pushed, so that the position of the toggle element 610 can be moved from the first position to the second position or from the second position to the first position, and the sliding element slides along the transmission shaft under the driving of the toggle element 610, thereby realizing the switching of the action mode of the inner knife 300.
In some embodiments, referring to fig. 2 and 8 in combination and fig. 11 to 17 in combination, the motion mode switching mechanism is a self-locking switching mechanism, and when the toggle member 610 is toggled to the first position or the second position, the toggle member 610 is self-locked in the first position or the second position. The operation action of the position of the locking toggle member 610 is not required to be additionally performed, and the operation convenience is further improved.
In some embodiments, referring to fig. 2, 8, and 9, the movement mode switching mechanism further includes a screw 620 and a toggle gear 630, the screw 620 is parallel to the transmission shaft 501, the toggle member 610 is integrally disposed on the screw 620 and moves along with the screw 620, an axial position of the toggle gear 630 is fixed, the toggle gear 630 is sleeved on the screw 620, the toggle gear 630 and the screw 620 are in threaded fit, and the housing 100 is provided with an avoidance window 101 for exposing the toggle gear 630.
During switching, the toggle gear 630 is toggled clockwise or counterclockwise to adjust the position of the toggle element 610, so as to drive the screw 620 to move along the axial direction, thereby driving the toggle element 610 to move from the first position to the second position or from the second position to the first position, so as to trigger the first trigger structure 701 or the second trigger structure 702, and switch the action mode of the inner knife 300, in the whole switching process, due to the threaded fit between the screw 620 and the toggle gear 630, the screw 620 and the toggle element 610 are always in the self-locking state, and other operations for locking the toggle element 610 are not required, and the operation is convenient.
When the toggle gear 630 is toggled, so that the screw 620 drives the toggle member 610 to move from the first position to the second position or from the second position to the first position, so as to trigger the first trigger structure 701 or the second trigger structure 702.
In some embodiments, the transmission mechanism 500 is provided with a first limiting structure for limiting the limit travel position of the toggle member 610, and the first position and the second position are both the limit travel position of the toggle member 610.
Specifically, referring to fig. 4 and 5, in some embodiments, the sliding member is mounted on the transmission shaft 501 through a pin 524, the pin 524 penetrates through the transmission shaft 501 along a radial direction of the transmission shaft 501, a guide installation groove 523a for the pin 524 to penetrate is formed in the sliding member, the guide installation groove 523a is a U-shaped groove, a width of the guide installation groove 523a is matched with that of the pin 524, a long side of the guide installation groove 523a extends along an axial direction of the transmission shaft 501, so that the pin 524 can move in the guide installation groove 523a along an axial direction of the transmission shaft 501, and when the pin 524 is located at one end of the guide installation groove 523a, the toggle member 610 is located at a first position; when the pin 524 is located at the other end of the guide mounting groove 523a, the toggle member 610 is located at the second position, and at this time, the guide mounting groove 523a and the pin 524 together achieve the limitation of the axial limit position of the sliding member on the transmission shaft 501, which also limits the limit stroke position of the toggle member 610.
Of course, in an actual implementation process, the first limiting structure may also be disposed on the casing 100, for example, in some embodiments, the casing 100 is provided with a first limiting surface and a second limiting surface, the first limiting surface, the toggle member 610, and the second limiting surface are sequentially arranged along the axial direction of the transmission shaft 501, the first triggering structure 701 is disposed on the first limiting surface, and the second triggering structure 702 is disposed on the second limiting surface; when the toggle member 610 moves to contact with the first position-limiting surface, the first triggering structure 701 is triggered, and when the toggle member 610 moves to contact with the second position-limiting surface, the second triggering structure 702 is triggered. The first limiting surface and the second limiting surface can limit the toggle piece 610 at a first position and a second position respectively, and provide corresponding mounting positions of the first trigger structure 701 and the second trigger structure 702, which is beneficial to reliably switching the state of the negative pressure system when the action modes of the inner knife 300 are switched.
In other embodiments, referring to fig. 10 to 18, the moving mode switching mechanism further includes a first self-locking structure 640 and a second self-locking structure 650, the first self-locking structure is used for self-adaptively locking the toggle member 610 at the first position when the toggle member 610 is toggled to the first position; the second self-locking structure 650 is configured to adaptively lock the toggle member 610 at the second position when the toggle member 610 is toggled to the second position, and the housing 100 is provided with a second operation window 103 through which the toggle member 610 is exposed to form an operation portion.
Preferably, in some embodiments, a second limiting structure for limiting the stroke position of the dial 610 is disposed between the dial 610 and the housing 100.
Specifically, in some embodiments, referring to fig. 18, the second operation window 103 is a U-shaped groove, when the dial 610 is located at one end of the second operation window 103, the dial 610 is located at a first position, and when the dial 610 is located at the other end of the second operation window 103, the dial 610 is located at a second position, and at this time, the second operation window 103 not only allows the dial 610 to extend out of the casing 100 to form an operation portion for an operator to operate, but also can limit a stroke position of the dial 610.
In some embodiments, referring to fig. 12 to 17 in combination, each of the first self-locking structure 640 and the second self-locking structure 650 includes a guide groove 102, a locking pin 641 movably disposed in the guide groove 102, a locking groove 611 for the locking pin 641 to be inserted into, and an elastic member 651 for driving the locking pin 641 to move toward the locking groove 611, a third limiting structure for preventing the locking pin 641 from being separated from the guide groove 102 is disposed in the guide groove 102, in fig. 12 to 17, the locking groove 611 is disposed on the toggle member 610, the guide groove 102 has two positions, the first self-locking structure and the second self-locking structure correspond to one of the guide groove 102 and the locking pin 641, the guide grooves 102 are distributed beside the stroke path of the toggle member 610, and the guide grooves 102 corresponding to the first self-locking structure and the second self-locking structure are both opened on the housing 100. One end of the locking pin 641 for being inserted into the locking groove 611 may be a spherical surface or an arc surface with smooth transition.
For convenience of description, the locking pin 641 and the elastic member 651 corresponding to the first self-locking structure are respectively defined as a first locking pin and a first elastic member, and the locking pin 641 and the elastic member 651 corresponding to the second self-locking structure are respectively defined as a second locking pin and a second elastic member.
Taking the spherical end surface of the locking pin 641 as an example, when the toggle member 610 is at the second position, the second locking pin is kept clamped in the locking groove 611 under the action of the second elastic member; when the toggle member 610 is toggled from the second position to the first position, the toggle member 610 pushes the spherical surface, the second elastic member compresses, so that the second locking pin is gradually pushed out from the locking groove 611, and when the toggle member 610 leaves the second position, the second elastic member drives the automatic locking pin 641 to reset; when the toggle element 610 reaches the first position, the outer profile of the toggle element 610 starts to overcome the elastic force of the first elastic element to push the first locking pin, so that the first locking pin is pushed against the outer profile of the toggle element 610, when the toggle element 610 reaches the first position, the locking groove 611 is aligned with the corresponding guide groove 102 of the first self-locking structure, the reset elastic force of the first elastic element drives the first locking pin to be clamped into the locking groove 611, in the whole process, the positioning mode can be switched to the sampling mode and self-locked only by toggling the toggle element 610 from the second position to the first position, and conversely, the sampling mode can be switched to the positioning mode and self-locked only by toggling the toggle element 610 from the first position to the second position of the toggle element 610.
In an actual implementation process, the guide groove may also be disposed on the toggle member, at least two locking grooves are correspondingly disposed, each locking groove is distributed beside a stroke path of the toggle member, and the locking grooves corresponding to the first self-locking structure and the second self-locking structure are both disposed on the housing (not shown).
In some embodiments, referring to fig. 3 to 7 in combination, the transmission mechanism 500 has a rotary cutting transmission path for driving the inner cutter 300 to rotate and a forward/backward transmission path for driving the inner cutter 300 to advance and retreat, wherein the sliding member is located on the rotary cutting transmission path, and the toggle member 610 cuts off or connects to the rotary cutting transmission path by driving the sliding member to move along the axial direction of the transmission shaft 501; when the toggle member 610 is toggled to the first position, the rotary cutting transmission line is switched to the connection state, and when the toggle member 610 is toggled to the second position, the rotary cutting transmission line is cut off.
Specifically, in some embodiments, referring to fig. 3 to fig. 5, the sliding member is a friction disc 523, a second gear 522 coaxial with the inner blade 300 and a rotary cutting gear 521 for driving the second gear 522 to rotate are further disposed on the rotary cutting transmission path, the rotary cutting gear 521 is rotatably disposed on the transmission shaft 201, and an axial position of the rotary cutting gear 521 is fixed; the friction disk 523 is integrated with the rotary cutting gear 521 or separated from the rotary cutting gear 521 by moving in the axial direction of the transmission shaft. Of course, in practical implementation, referring to fig. 6 and 7, the sliding member may also be a rotary cut gear 521, a spline structure or a key connection structure serving as the first guiding torque transmission structure is provided between the rotary cut gear 521 and the transmission shaft 501, and the rotary cut gear 521 enables or disables the first guiding torque transmission structure by moving along the axial direction of the transmission shaft.
For the convenience of understanding, the friction disc 523 is taken as an example of a sliding member, in fig. 3, the forward and backward transmission path includes a first gear 512 disposed coaxially with the inner knife 300 and a forward and backward gear 511 for driving the first gear 512 to rotate, the rotary cutting transmission path includes a second gear 522 disposed coaxially with the inner knife 300 and a rotary cutting gear 521 for driving the second gear 522 to rotate, the transmission sleeve 502 is integrally sleeved outside the inner knife 300, the first gear 512 and the second gear 522 are both sleeved outside the transmission sleeve 502, the transmission sleeve 502 is in threaded fit with the first gear 512, and a guiding and torque transmitting structure (such as a spline, a key, etc.) is disposed between the second gear 522 and the transmission sleeve 502. When the friction disc 523 is disengaged from the rotary cutting gear 521, the first gear 512 rotates, the second gear 522 stops rotating, the transmission sleeve 502 cannot rotate under the action of the guide transmission structure, and the power of the first gear 512 is transmitted to the transmission sleeve 502 through the threads, so that the transmission sleeve 502 moves forward and backward to drive the inner cutter 300 to move forward and backward; when the friction disc 523 is integrated with the rotary-cut gear 521, the first gear 512 and the second gear 522 rotate together with the transmission shaft 501, the first gear 512 drives the transmission sleeve 502 to move forward and backward, and the second gear drives the transmission sleeve 502 to rotate, so as to drive the inner cutter 300 to move forward and backward as well as rotate.
When the mode of the biopsy system is switched, the toggle member 610 is directly or indirectly toggled to move from the first position to the second position or from the second position to the first position, when the toggle member 610 is located at the second position, the friction disc 523 is correspondingly located at a position separated from the rotary-cut gear 521, the driving power cannot be transmitted from the friction disc 523 to the rotary-cut gear 521, the inner cutter 300 stops rotating, when the toggle member 610 is located at the first position, the friction disc 523 is toggled to a position integrated with the rotary-cut gear 521, the friction disc 523 drives the rotary-cut gear 521 to rotate, the driving power is transmitted from the friction disc 523 to the rotary-cut gear 521, and in the working process, the switching of the working mode of the inner cutter 300 can be realized only by toggling the toggle member 610.
In fig. 3, in order to realize that the rotary cutting transmission path and the advancing and retreating transmission path share one driving element 400, the rotary cutting gear 521 and the advancing and retreating gear 511 are coaxially arranged with the output shaft of the driving element, so that the advancing and retreating transmission path and the rotary cutting transmission path share the same driving element 400.
In practical implementation, end face teeth may be arranged between the friction disc 523 and the rotary-cut gear 521, or a contact surface of the friction disc 523 and the rotary-cut gear 521 has a high roughness, so that the friction disc 523 and the rotary-cut gear 521 can rotate synchronously after being combined into a whole, preferably, in some embodiments, an outer conical surface is arranged on the friction disc 523, an outer conical surface is arranged on the rotary-cut gear 521, after the outer conical surface and the inner conical surface are contacted, the friction disc 523 and the rotary-cut gear 521 rotate synchronously, and a high roughness is arranged between the outer conical surface and the inner conical surface or a spline is arranged between the inner conical surface and the outer conical surface, so that the friction disc 523 and the rotary-cut gear 521 can rotate synchronously after being combined into a whole, and by setting the joint surface as a conical surface, the friction disc 523 can have a certain guiding effect on the friction disc 523 in the process of changing the friction disc from a state of being separated from the rotary-cut gear 521 to being in contact with the rotary-cut gear 521, the friction disc 523 is less prone to being eccentric, and the transmission reliability can be improved.
In some embodiments, referring to fig. 11, the sliding member is a friction disc 523, and the transmission shaft 501 is further provided with a return spring 503 for driving the friction disc 523 to slide and return in a direction of the rotary cutting gear 521, according to a procedure of an operation, the biopsy system is now in the positioning mode, and then enters the sampling mode, and the return spring makes a process of switching from the positioning mode to the sampling mode more labor-saving, and is beneficial to help an operator to switch from the positioning mode to the sampling mode more reliably and more labor-saving, so as to improve reliability of the whole biopsy system during the operation.
In the above embodiments, the biopsy system has only two modes, namely the positioning mode and the sampling mode, and the locking positions of the toggle member 610 have only two positions, namely the first position and the second position, and in the actual implementation process, if there are three or more modes of the biopsy system, there may be three or more locking positions of the toggle member 610 that are correspondingly arranged.
In the description of the present invention, unless otherwise expressly specified or limited, the arrangement of a first feature "on" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. A mode adjustable biopsy system comprising a biopsy needle, a biopsy handle and a negative pressure system, the biopsy handle comprising a housing, characterized in that the biopsy handle further comprises:
the transmission mechanism is provided with a rotary cutting transmission line for driving an inner knife of the biopsy needle to rotate and a forward and backward transmission line for driving the inner knife to advance and retreat;
the rotary cutting device comprises a rotary cutting transmission line, a motion mode switching mechanism and a control mechanism, wherein the motion mode switching mechanism comprises a shifting piece, the stroke position of the shifting piece comprises a first position and a second position, and the shifting piece cuts off or connects the rotary cutting transmission line by changing the stroke position;
the first trigger structure is used for starting the negative pressure system after being triggered, and the position of the first trigger structure corresponds to the first position;
the second trigger structure is used for closing the negative pressure system after being triggered; the position of the second trigger structure corresponds to the second position;
when the stirring piece is stirred to the first position, the rotary cutting transmission line is connected, the stirring piece triggers the first triggering structure, and the negative pressure system is started; when the stirring piece is stirred to the second position, the rotary cutting transmission line is cut off, the stirring piece triggers the second triggering structure, and the negative pressure system is closed.
2. The adjustable mode biopsy system of claim 1, wherein: the transmission mechanism comprises a transmission shaft and a sliding part arranged on the transmission shaft, and the sliding part slides along the transmission shaft to cut off or connect the rotary cutting transmission route by shifting the shifting part.
3. The adjustable mode biopsy system of claim 2, wherein: the motion mode switching mechanism is a self-locking switching mechanism, and when the shifting piece is shifted to the first position or the second position, the shifting piece is self-locked at the first position or the second position.
4. The adjustable mode biopsy system of claim 3, wherein: the motion mode switching mechanism further includes:
the screw rod is parallel to the transmission shaft, and the poking piece is integrally arranged on the screw rod and moves along with the screw rod;
the axial position of the toggle gear is fixed, the toggle gear is sleeved on the screw rod, the toggle gear is in threaded fit with the screw rod, and an avoidance window for exposing the toggle gear is arranged on the shell;
when the switching is performed, the toggle gear is toggled, so that the screw drives the toggle piece to move from the first position to the second position or from the second position to the first position, and the first trigger structure or the second trigger structure is triggered.
5. The adjustable mode biopsy system of claim 4, wherein: the transmission mechanism or the shell is provided with a first limiting structure used for limiting the limit travel position of the toggle piece, and the first position and the second position are both the limit travel position of the toggle piece.
6. The adjustable mode biopsy system of claim 5, wherein: the sliding part is installed on the transmission shaft through a pin shaft, the pin shaft penetrates through the transmission shaft along the radial direction of the transmission shaft, a guide installation groove for the pin shaft to penetrate through is formed in the sliding part, the guide installation groove is a U-shaped groove, the width of the guide installation groove is matched with that of the pin shaft, and the long edge of the guide installation groove extends along the axial direction of the transmission shaft, so that the pin shaft can move in the guide installation groove along the axial direction of the transmission shaft; when the pin shaft is positioned at one end of the guide mounting groove, the toggle piece is positioned at the first position; when the pin shaft is positioned at the other end of the guide mounting groove, the toggle piece is positioned at the second position;
and/or
The transmission shaft is characterized in that a first limiting surface and a second limiting surface are arranged on the shell, the first limiting surface, the poking piece and the second limiting surface are sequentially arranged along the axial direction of the transmission shaft, the first trigger structure is arranged on the first limiting surface, and the second trigger structure is arranged on the second limiting surface.
7. The adjustable mode biopsy system of claim 3, wherein: the movement mode switching mechanism further includes:
the first self-locking structure is used for self-adaptively locking the shifting piece at the first position when the shifting piece is shifted to the first position;
the second self-locking structure is used for self-adaptively locking the toggle piece at the second position when the toggle piece is toggled to the second position;
the casing is provided with a second operation window for exposing the poking piece to form an operation part.
8. The adjustable mode biopsy system of claim 7, wherein: a second limiting structure used for limiting the stroke position of the toggle piece is arranged between the toggle piece and the shell;
the second operation window is a U-shaped groove, when the toggle piece is positioned at one end of the second operation window, the toggle piece is positioned at the first position, and when the toggle piece is positioned at the other end of the second operation window, the toggle piece is positioned at the second position.
9. The mode adjustable biopsy system of claim 8, wherein the first and second self-locking structures each comprise:
the locking device comprises a guide groove, a locking pin movably arranged in the guide groove, a locking groove for the locking pin to be clamped in, and an elastic piece for driving the locking pin to move towards the side where the locking groove is located, wherein a third limiting structure for preventing the locking pin from being separated from the guide groove is arranged in the guide groove,
the locking groove is arranged on the shifting piece, the number of the guide grooves is at least two, the guide grooves are distributed beside a stroke path of the shifting piece, and the guide grooves corresponding to the first self-locking structure and the second self-locking structure are arranged on the shell; or the guide groove is arranged on the shifting piece, the locking grooves are at least two, the locking grooves are distributed beside the stroke path of the shifting piece, and the locking grooves corresponding to the first self-locking structure and the second self-locking structure are arranged on the shell.
10. The adjustable mode biopsy system of claim 2, wherein:
the sliding piece is a friction disc, a second gear coaxial with the inner cutter and a rotary cutting gear for driving the second gear to rotate are further arranged on the rotary cutting transmission path, the rotary cutting gear is rotatably arranged on the transmission shaft, and the axial position of the rotary cutting gear is fixed; the friction disc is integrated with the rotary-cut gear or separated from the rotary-cut gear by moving along the axial direction of the transmission shaft;
or
The sliding piece is a rotary cutting gear, and a first guide torque transmission structure is arranged between the rotary cutting gear and the transmission shaft, wherein the rotary cutting gear enables the first guide torque transmission structure to take effect or fail by moving along the axial direction of the transmission shaft.
11. The adjustable mode biopsy system of claim 10, wherein: when the sliding piece is a friction disc, a return spring for driving the friction disc to slide and reset towards the direction of the rotary cutting gear is further arranged on the transmission shaft, and the return spring is sleeved outside the transmission shaft.
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| CN113243942A (en) | 2021-08-13 |
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