CN206565975U - Rotary-cut samples cutter - Google Patents

Abstract

Cutter is sampled the utility model discloses a kind of rotary-cut, including front end is provided with the outer knife and the interior interior knife for being placed on outer knife of sampling groove, in addition to the translation actuator for being circumferentially driven the rotating drive part of axial sliding fit with interior knife and coordinating with interior knife by screw structure；Knife rotates and forms speed discrepancy with translation actuator in the rotating drive part driving, is axially moved by knife in speed discrepancy driving and then realizes sampling groove sampling；Drive interior swivel dynamic by way of rotating drive part and translation actuator are rotated with differential and translational motion, decelerator is avoided the need for realize deceleration output and cause cutter complicated integral structure and heavier, pass through the setting of differential drive gear, ensure to rotate and translation is not susceptible to interference, operation rotary-cut efficiency high, operating assembly kinetic stability is high, it is ensured that operation safety.

Description

Rotary-cut samples cutter

Technical field

The utility model is related to a kind of medical operating biopsy sampler tool, and in particular to a kind of rotary-cut samples cutter.

Background technology

Doctor generally when to carrying out live body sampling in patient body or removing lesion tissue, is taken in operation using rotary-cut Sample cutter is operated, and interior knife is generally included with cutter for rotary-cut operation on market today and the outer knife of interior knife is coated at, outside The forward end of knife is radially provided with sampling groove；After puncture, sampling groove is inhaled into condition of negative pressure undertissue, now the rotary-cut forward of interior knife Tissue is cut and accommodated into interior knife front end；Certainly, interior knife foremost can close sampling groove during puncture, be punctured to behind position Concede sampling groove backward again, the position conceded and distance according to sampling number and determine, start to apply negative pressure during conceding, Rotary-cut sampling is carried out again；In the prior art, for driving interior swivel dynamic with translation vertically to separate independent drive mechanism, lead to Cross the interior swivel of motor driving to move, while promoting interior knife to slide axially by push rod, and then realize that rotation and translation are implemented in combination with rotation Cut, and the type of drive of push rod is including electronic and manual, it is manually operated cumbersome, it is inefficient, and also need to arrange during motorized motions Decelerator slowly promotes interior knife to realize so that rotary-cut sampling cutter structure is complicated, and overall weight is heavier, and is used for interior swivel The drive mechanism of dynamic and translation is also easy to produce interference, causes interior knife to engage, and causes rotary-cut to sample cutter fluctuation of service, easily to hand Art brings risk.

Utility model content

In view of this, the purpose of this utility model is to overcome defect of the prior art to sample cutter there is provided a kind of rotary-cut, The structure that rotary-cut samples cutter can be simplified, the stability of interior knife operation is improved, it is ensured that the safety of operation.

Rotary-cut of the present utility model samples cutter, including front end is provided with the outer knife and the interior interior knife for being placed on outer knife of sampling groove, The translation for also including circumferentially being driven the rotating drive part of axial sliding fit with interior knife and with interior knife by screw structure coordinating is driven Moving part；Knife rotates and forms speed discrepancy with translation actuator in the rotating drive part driving, passes through knife in speed discrepancy driving It is axially moved and then realizes that sampling groove is sampled.

Further, in addition to fixed jacket is in the rotation pushing sleeve of interior knife, the translation actuator be translation drive gear simultaneously Rotation pushing sleeve is coated in the way of coordinating with rotation pushing sleeve screw thread.

Further, the rotating drive part is the rotation actuating sleeve that rotation pushing sleeve is coated in radially spacing mode, is turned Dynamic the cylindrical of actuating sleeve is provided with rotation travelling gear；Rotation the cylindrical of pushing sleeve extends radially outward to be formed by keyway arrangements Slid axially with rotation actuating sleeve inner circle and be circumferentially driven the land coordinated.

Further, the front end face that the rear end face for rotating actuating sleeve presses on translation drive gear is formed to be driven to translation Gear axial limiting；The rear end inner circle for rotating actuating sleeve, which projects radially inwards to be formed, is coated at spiral shell outside rotation pushing sleeve rear end The support ring of line.

Further, the inner circle for rotating actuating sleeve is axially disposed a long key of guiding, the land is cylindrical be provided with The chute that long key coordinates is oriented to, the long key of guiding and chute are respectively multiple and be along the circumferential direction distributed.

Further, the long key and the horizontal section of chute of being oriented to is rectangle.

Further, the interior knife front end side wall is provided with passage, the rear port of interior knife by formed negative pressure make gas according to Secondary radial clearance, passage and interior knife inner chamber by interior knife and outer knife simultaneously form current path.

Further, in addition to rear end is inserted and fixed in the puncturing head of outer knife front end, the rear end of puncturing head axially rearward Cylindrical to be provided with heavy platform, the interior knife front end is provided with from the front to the back radially inclined rotary-cut cutter head, the heavy platform What rear end formation was engaged with peeling knife head tilt degree is used for the inclined-plane to rotary-cut cutter head axial limiting.

Further, the rear end face of the puncturing head protrudes to form push and block post axially rearward, in the push and block post and interior knife Radial clearance is formed between circle.

Further, the passage is circumferentially arranged bar hole, and the bar hole is one circumferentially extending Ventilation ring, or the bar hole is multiple and constitute ventilation ring, the ventilation ring in the way of being distributed uniformly and circumferentially Axially disposed is at least one.

The beneficial effects of the utility model are：A kind of rotary-cut sampling cutter, is driven by rotating disclosed in the utility model Part and translation actuator drive interior swivel dynamic and translational motion in the way of differential is rotated, it is to avoid need decelerator to realize that deceleration is defeated Go out and cause cutter complicated integral structure and heavier, pass through the setting of differential drive gear, it is ensured that rotate and translation is not susceptible to Interference, rotary-cut efficiency high of performing the operation, operating assembly kinetic stability is high, it is ensured that operation safety.

Brief description of the drawings

The utility model is further described with reference to the accompanying drawings and examples：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is enlarged drawing at A in Fig. 1；

Fig. 3 is the structural representation of handle in the utility model；

Fig. 4 is mounted configuration schematic diagram of the present utility model；

Fig. 5 is enlarged drawing at B in Fig. 4；

Fig. 6 is enlarged drawing at C in Fig. 5；

Fig. 7 is the structural representation of rotating drive part and translation actuator in the utility model；

Fig. 8 is Fig. 7 left view.

Embodiment

Fig. 1 is structural representation of the present utility model, and Fig. 2 is enlarged drawing at A in Fig. 1, and Fig. 3 is handle in the utility model Structural representation, Fig. 4 is mounted configuration schematic diagram of the present utility model, and Fig. 5 is B places enlarged drawing in Fig. 4, and Fig. 6 is in Fig. 5 Enlarged drawing at C, Fig. 7 is the structural representation of rotating drive part and translation actuator in the utility model, and Fig. 8 is Fig. 7 left view Figure, as illustrated, the rotary-cut sampling cutter 1 in the present embodiment；Including outer knife 3 of the front end provided with sampling groove 5, interior it is placed on outer knife 3 Interior knife 4 and the handle of a knife 15 that is fixedly connected with outer knife 3, in addition to driven with the rotation of the circumferential transmission axial sliding fit of interior knife 4 Part 6 and the translation actuator 7 coordinated with interior knife 4 by screw structure；The rotating drive part 6 drives interior knife 4 to rotate and with putting down The dynamic formation of actuator 7 speed discrepancy, drives interior knife 4 to be axially moved and then realizes that sampling groove 5 is sampled by the speed discrepancy；Front end is knife The cutting tip of tool, on the contrary it is rear end, and the interior translation of knife 4 represents that interior knife 4 is moved axially in reciprocal fashion, and coordinates the interior own rotation of knife 4 to realize Rotary-cut campaign, certainly, the different rotating speeds of rotating drive part 6 and translation actuator 7 can be by setting different drive ratios or Bu Tong electricity The different rotating speeds driving of machine can realize that rotating drive part 6 and translation actuator 7 rotation direction may be the same or different, and turn To it is identical when in the axially driving speed of knife 4 it is slower, turn to it is different when the axially driving speed of interior knife 4, utilize rotating drive part 6 Knife 4 in differential realization driving is rotated with translation actuator 7, simplifies the stabilization that knife 4 is run in the structure that rotary-cut samples cutter, raising Property, it is ensured that the safety of operation；Screw structure drives existing drive mechanism, will not be repeated here.

In the present embodiment, in addition to fixed jacket, in the rotation pushing sleeve 11 of interior knife 4, the translation actuator 7 drives for translation Moving gear 7 is simultaneously coated at rotation pushing sleeve 11 in the way of coordinating with the rotation screw thread of pushing sleeve 11；Rotation the cylindrical of pushing sleeve 11 is set External screw thread is put, the translation drive gear 7 can be coated at rotation pushing sleeve middle-end or rear end, be preferably coated at after rotation pushing sleeve 11 End, is arranged at the posterior segment that the cylindrical external screw thread of rotation pushing sleeve 11 is located at rotation pushing sleeve 11, it is ensured that structure compact conformation, such as figure institute Show, axial restraint of the translation drive gear 7 along handle of a knife 15 is set, certain translation actuator 7 can also use V belt translation Or Chain conveyer, utility model purpose can be realized, the present embodiment preferably directly gear drive is simple in construction, easy for installation；Pass through The screw structure driving rotation precession of pushing sleeve 11, and then knife 4 rotary-cut campaign in driving, it is ensured that driving force is greatly and stably.

In the present embodiment, the rotating drive part 6 is that the rotation for being coated at rotation pushing sleeve 11 in radially spacing mode is driven Dynamic set 6, cylindrical be provided with rear end for rotating actuating sleeve 6 rotates travelling gear 12；Rotation the cylindrical of pushing sleeve 11 radially prolongs Stretch to form land 13, land 13 is coordinated by keyway arrangements with rotating the inner circle of actuating sleeve 6 and sliding axially circumferentially to be driven；Land 13 is excellent Bit selecting is in the cylindrical front end of rotation pushing sleeve 11, and certainly, land 13 is radially supported in rotation actuating sleeve 6, is driven by rotating The setting of dynamic set 6, it is ensured that the external screw thread of rotation pushing sleeve 11 is interfered with rotating actuating sleeve 6, while rotating the inner circle edge of actuating sleeve 6 It is axially arranged to be oriented to long key or chute and the chute or feather key of land 13 coordinate, it is adaptable to rotate pushing sleeve 11 axially with respect to Actuating sleeve 6 is rotated to slide.

In the present embodiment, the front end face that the rear end face for rotating actuating sleeve 6 presses on translation drive gear 7 is formed to flat The dynamic axial limiting of drive gear 7；The inner circle for rotating actuating sleeve 6 is projected radially inwards to be formed and is coated at outside rotation pushing sleeve 11 The support ring 12a of screw thread；The support ring 12a is preferably placed at the inner circle rear end for rotating actuating sleeve 6, and actuating sleeve is rotated beneficial to reducing Frictional force between 6 and translation drive gear 7 between rotation actuating sleeve 6 and rotation pushing sleeve 11, support ring 12a can be passed with rotating Moving gear 12 is radially just right, beneficial to ensureing to rotate the stability of actuating sleeve 6 radially, is rotated beneficial to rotation actuating sleeve 6 is improved Stability.

In the present embodiment, the inner circle for rotating actuating sleeve 6 is axially disposed the long key 6a of guiding, and the land 13 is cylindrical It is respectively multiple and circumferentially square to be provided with the chute 13a, the guiding long key 16a and chute 13a coordinated with being oriented to long key 6a To distribution；The present embodiment is oriented to long key 16a and chute 13a and is respectively 4 and is distributed uniformly and circumferentially, and further improves rotation Turn the stability of the slip of pushing sleeve 11, it is to avoid locking.

In the present embodiment, the horizontal section of the keyway arrangements is rectangle；Beneficial to the stability for improving keyway arrangements cooperation, Easy to process, fit precision is high.

In the present embodiment, the interior front end side wall of knife 4 is provided with passage 20, and the rear port of interior knife 4 is by forming negative pressure Gas is set to pass sequentially through radial clearance 21, passage 20 and the interior knife inner chamber 22 of interior knife 4 and outer knife 3 and form current path；Institute The interior rear end of knife 4 connection aspirator is stated, passes through the setting of passage 20, it is to avoid interior knife 4 is formed in front end and blocked, while avoiding liquid Body enters the radial clearance 21 of interior knife 4 and outer knife 3, and the setting of the radial clearance 21 is easy to ensure that the negative pressure of inner chamber front end is fitted In, beneficial to the absorption of sample.

In the present embodiment, in addition to rear end is inserted and fixed in the puncturing head 23 of the outer front end of knife 3, puncturing head axially rearward 23 rear end is cylindrical to be provided with heavy platform 24, and the interior front end of knife 4 is provided with from the front to the back radially inclined rotary-cut cutter head 25, the rear end of the heavy platform 24, which forms the inclined-plane 26 being engaged with the gradient of rotary-cut cutter head 25, to be used to axially limit rotary-cut cutter head 25 Position；By setting inclined-plane 26 to the axial limiting of rotary-cut cutter head 25 in the heavy rear end of platform 24, the damage to rotary-cut cutter head 25 can be avoided, together When ensure to be sampled and originally can be completely severed.

In the present embodiment, the rear end face of the puncturing head 23 protrudes to form push and block post 27 axially rearward, when interior knife 4 is moved To foremost when, radial clearance 28 is formed between push and block post 27 and interior knife 4 inner circle；Push and block post 27 is set to take sample The front end of sample groove 5 forms the structure gradually decreased from the front to the back, is easily cut off beneficial to sample at inclined-plane 26, it is ensured that smoothly take Sample.

In the present embodiment, the passage 20 be circumferentially arranged bar hole, the bar hole 20 be one circumferentially The ventilation ring of direction extension, or the bar hole are multiple and ventilation ring is constituted in the way of being distributed uniformly and circumferentially, institute It is at least one to state ventilation ring axially disposed；Circumferentially arranged bar hole described in the present embodiment is 3, the ventilation ring edge Axially arranged is 2, and the structure is beneficial to ensure that gas flow is big and it is smooth to ventilate, while ensureing that the intensity of rotary-cut cutter head 25 is big, no It is fragile.

The rotary-cut is sampled when cutter 1 is used with handle 2 by connecting and fixing, and the handle housing 14 of handle 2 is set vertically Mounting groove 16 is put, the rear end face of the mounting groove 16 is fixedly installed pin 18a axially forward, and the front end of mounting groove 16 is fixed It is provided with the jump ring 17 for fixing handle of a knife 15；The rear end of the handle of a knife 15 is provided with to be coordinated for radially fixed with pin 18a The open slot 18 of handle of a knife 15, the cylindrical depression radially inward in front end of handle of a knife 15 forms what is be embedded in for the radial direction claw of jump ring 17 Buckling groove 19；As shown in the figure in embodiment, the pin 18a and open slot 18 are two, the radial direction claw and card of jump ring 17 Access slot 19 is also two, during installation, first tilts handle of a knife 15 and installs backward, pin 18a is embedded in open slot 18, then makes The front end of handle of a knife 15 is moved upwards, is allowed the front end of handle of a knife 15 to be embedded in jump ring 17 and is made the radial direction claw link groove 19 of jump ring 17 real Now connect and fix, conversely, during dismounting, first tearing the front end of handle of a knife 15 open, then tear rear end, fast and easy assembly and disassembly, fixing-stable open.

Finally illustrate, above example is only unrestricted to illustrate the technical solution of the utility model, although ginseng The utility model is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this The technical scheme of utility model is modified or equivalent substitution, without departing from the objective and model of technical solutions of the utility model Enclose, it all should cover among right of the present utility model.

Claims (10)

1. a kind of rotary-cut samples cutter, it is characterised in that：The outer knife and the interior interior knife for being placed on outer knife of sampling groove are provided with including front end, The translation for also including circumferentially being driven the rotating drive part of axial sliding fit with interior knife and with interior knife by screw structure coordinating is driven Moving part；Knife rotates and forms speed discrepancy with translation actuator in the rotating drive part driving, passes through knife in speed discrepancy driving It is axially moved and then realizes that sampling groove is sampled.

2. rotary-cut according to claim 1 samples cutter, it is characterised in that：Also pushed away including fixed jacket in the rotation of interior knife Set, the translation actuator is translation drive gear and is coated at rotation pushing sleeve in the way of coordinating with rotation pushing sleeve screw thread.

3. rotary-cut according to claim 2 samples cutter, it is characterised in that：The rotating drive part is with radially spacing Mode is coated at the rotation actuating sleeve of rotation pushing sleeve, rotates the cylindrical of actuating sleeve and is provided with rotation travelling gear；Rotate pushing sleeve It is cylindrical to extend radially outward the land to form the circumferential transmission cooperation that slid axially by keyway arrangements and rotation actuating sleeve inner circle.

4. rotary-cut according to claim 3 samples cutter, it is characterised in that：The rear end face for rotating actuating sleeve is pressed on The front end face of translation drive gear forms axially spacing to translation drive gear；The rear end inner circle for rotating actuating sleeve is radially Inwardly projecting formation is coated at the rotation externally threaded support ring in pushing sleeve rear end.

5. rotary-cut according to claim 3 samples cutter, it is characterised in that：The inner circle for rotating actuating sleeve is set vertically The long key of guiding is equipped with, the land is cylindrical to be provided with being oriented to the chute that long key coordinates, and the long key of guiding and chute are respectively It is multiple and be along the circumferential direction distributed.

6. rotary-cut according to claim 5 samples cutter, it is characterised in that：The horizontal section for being oriented to long key and chute For rectangle.

7. rotary-cut according to claim 1 samples cutter, it is characterised in that：The interior knife front end side wall is provided with ventilation Hole, the rear port of interior knife makes gas pass sequentially through in radial clearance, passage and the interior knife of interior knife and outer knife by forming negative pressure Chamber simultaneously forms current path.

8. rotary-cut according to claim 1 samples cutter, it is characterised in that：Also inserted axially rearward including rear end and solid Due to the puncturing head of outer knife front end, the rear end of puncturing head is cylindrical to be provided with heavy platform, and the interior knife front end is provided with edge from the front to the back The rotary-cut cutter head being radially outwardly sloping, the rear end of the heavy platform formed be engaged with peeling knife head tilt degree for peeling knife The inclined-plane of head axial limiting.

9. rotary-cut according to claim 8 samples cutter, it is characterised in that：The rear end face of the puncturing head is axially rearward Protrusion forms push and block post, and radial clearance is formed between the push and block post and interior knife inner circle.

10. rotary-cut according to claim 7 samples cutter, it is characterised in that：The passage is circumferentially arranged bar Shape hole, the bar hole is a circumferentially extending ventilation ring, or the bar hole is multiple and with along the circumferential direction Equally distributed mode constitutes ventilation ring, and the axially disposed ventilation ring is at least one.