CN1654023A - Medical engine head and its cutting tools - Google Patents

Medical engine head and its cutting tools Download PDF

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Publication number
CN1654023A
CN1654023A CN 200410005345 CN200410005345A CN1654023A CN 1654023 A CN1654023 A CN 1654023A CN 200410005345 CN200410005345 CN 200410005345 CN 200410005345 A CN200410005345 A CN 200410005345A CN 1654023 A CN1654023 A CN 1654023A
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CN
China
Prior art keywords
cutting tool
shank
jacket
medical head
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 200410005345
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Chinese (zh)
Inventor
中西崇介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nakanishi Inc
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Nakanishi Inc
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Filing date
Publication date
Application filed by Nakanishi Inc filed Critical Nakanishi Inc
Priority to CN 200410005345 priority Critical patent/CN1654023A/en
Publication of CN1654023A publication Critical patent/CN1654023A/en
Pending legal-status Critical Current

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Abstract

The medical tool includes one cutter with slender and flexible handle and drilling bit in the far end; one tubular sheath with slender pipe, handle part and inserted part for the cutter to be inserted in; and one detachable driving head held in the near end of the cutter for transferring the driving force to the cutter. The slender pipe of the sheath is deformable and the handle of the cutter and the inserted part can deform via following the deforming slender pipe. The cutter includes one handle part and the handle part has one first part and the second part with even higher elastic deformation than the first part.

Description

Medical head and cutting tool thereof
Technical field
The present invention relates to medical head and cutting tool thereof, particularly, relate to and have medical head and this cutting tool that is rotatably driven with the cutting tool at cutting treatment position.
Background technology
Medical head is commonly used.The medical head of some kinds has cutting tool, and these cutting tools are rotatably driven with the cutting treatment position by drive source such as motor.Through the used drill bit of the operation of nasal bone is exactly one of this medical head, and has expanded so that the nasal cavity that inserts is used to cut the preceding bone of patient's hypophysis usually by the far-end insertion patient with drill bit.
Fig. 7 shows the example of this conventional medical head.Medical head 30 mainly comprises: elongated cutting tool 31, one tubular sheath 32 and handpiece body 33.Cutting tool 31, it has the far-end 31a that is furnished with the drill bit that is used for the cutting treatment position, is inserted into one tubular sheath 32 from its near-end (not shown), and is fixed in the handpiece body 33 at its near-end.Handpiece body 33 has inner card disc mechanism (not shown), so that the near-end of cutting tool 31 is dismantled and assembled.Chuck mechanism is by 34 operations of rotation torsion circle.For example, the torsion circle 34 that turns clockwise, chuck mechanism unclamps, and cutting tool 31 can be pulled down; And be rotated counterclockwise torsion circle 34, and the chuck mechanism closure, thus block the near-end of cutting tool 31.One tubular sheath 32 has connector part 32b, and there is screw thread its inside, so that be screwed on the complementary threads part (not shown) on the handpiece body 33 far-end 33a.The near-end 33b of handpiece body 33 is configured to link to each other with drive source such as motor (not shown).During use, operator is held this medical head 30 in handle portion 35, is used to the driving force in self-driven source, rotatably drives cutting tool 31.
The one tubular sheath 32 of this head 30 is straight, and firm relatively, and the angle of one tubular sheath 32 can not change.Like this, in cutting operation, operator is difficult to see the far-end 31a of cutting tool 31, and is difficult to guiding far-end 31a arrival desired zone.
On the other hand, the surgeon uses the different medical head of a plurality of one tubular sheath length to treat different zones usually, and this correspondingly needs the different a plurality of cutting tools of length.When cleaning medical head or when sterilizing, will pull down cutting tool usually so that clean respectively, and after cleaning, reinstall on the head rack with autoclave.This especially before perioperatively or in operation, seems quite complicated and loaded down with trivial details with cutting tool and corresponding head coupling to the surgeon.
Summary of the invention
The purpose of this invention is to provide that a kind of to allow operator to observe cutting tool in operation process most advanced and sophisticated and regulate jacket to reach the medical head of optimum Cutting angle.
Another object of the present invention provides a kind of medical head, and its cutting tool mates easily with head rack after pulling down cleaning or sterilization.
Another object of the present invention provides a kind of cutting tool that is used for medical head, and it has the pliability of the selection that has improved.
According to the present invention, a kind of medical head that is used for the cutting treatment position is provided, comprising:
Cutting tool with far-end and near-end, and this instrument has the shank of elongated flexible has stiletto at the described far-end of cutting tool;
Hold the common jacket in a tubular form of cutting tool wherein, this jacket has elongated pipe portion;
The insert that between the shank of the elongated tubular portion of jacket and cutting tool, inserts;
The handpiece body that links to each other with jacket is removably keeping the described near-end of cutting tool, and being used in the future, the driving force in self-driven source passes to cutting tool;
Wherein, there are ductility and deformable in the described elongated tubular portion of jacket, and the described shank of cutting tool and described insert can and be out of shape along with the Drawability distortion of elongated tubular portion.
According to an aspect of the present invention, cutting tool can have labelling, and jacket and/or handpiece body can have and the identical labelling of marker color on the cutting tool, even this facilitates when head is opened also with the support coupling of cutting tool with corresponding head.
According to the present invention, the cutting tool that is used for above-mentioned medical head also is provided, comprising:
Be positioned at the stiletto of cutting tool far-end, be used for the cutting treatment position;
The shank of the elongated flexible of closely extending to stiletto; And
Bearing contact portion between stiletto and shank is supported by the bearing in the medical head in the time of in cutting tool is installed in medical head;
Wherein, described shank has the intravital first of the head that is stuck in medical head, and has enough pliabilities, the second portion of the easier strain of comparable described first.
For the pliability of required selection is provided, the diameter of the second portion of shank is littler than the diameter of first.By so littler diameter, second portion, thereby and whole shank can become shorter, and keep enough pliabilities simultaneously, so that can and be out of shape along with the Drawability distortion of the elongated tubular portion of the jacket of the medical head that is equipped with cutting tool.
Description of drawings
By example, describe the preferred embodiments of the present invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the decomposition diagram according to an embodiment of medical head of the present invention;
Fig. 2 is the longitdinal cross-section diagram of the distal portions of the head among Fig. 1, and part is a front view, shows the cutting tool that is installed in the jacket;
Fig. 3 is a longitdinal cross-section diagram, and part be a front view, and is similar to Fig. 2, shows the cutting tool of part extraction in the jacket;
Fig. 4 is the schematic partial cross-sectional view of head shown in Figure 1;
Fig. 5 is the perspective diagram of head shown in Figure 1, shows the distortion of the distal portions of head;
Fig. 6 is the side view according to another embodiment of cutting tool of the present invention; And
Fig. 7 is the perspective diagram of conventional medical head.
The specific embodiment
Referring to Fig. 1 to 5, medical head 10 of the present invention comprises: cutting tool 1, and jacket 3, insert 4, and handpiece body 5 is as main element.
Cutting tool 1 has the stiletto 1a that is used for the cutting treatment position at its far-end, extends the shank 1e near stiletto 1a, and is installed in the bearing contact portion 1B between stiletto 1a and the shank 1e.Each self-forming of these parts and by suitable manner as by welding or use that binding agent is whole to be connected.Stiletto 1a can be by forming as the electro-deposition of corundum, additional steel cutter head or welding carbide bit.Shank 1e is elongated and pliable and tough, for example, can be made by metal such as rustless steel.Shank 1e is elastically deformable in its elastic limit, can be in the scope internal strain with respect to the about 30 degree angles of its longitudinal axis.Bearing contact portion 1B comprises reinforcement 1b and lightening holes 1d, forms step 1c between the two.
Jacket 3 is used to hold cutting tool 1 wherein usually in a tubular form, and have the 3c of elongated tubular portion, the connector part 3b that forms at the near-end of the 3c of pipe portion and the top medicated cap 3d that is fixed on the far-end of the 3c of pipe portion.
The 3c of pipe portion has ductility and deformable, can be in preset range as in the scope that become 30 degree angles with respect to its longitudinal axis, and be out of shape extendingly and do not rupture.The 3c of pipe portion can be made of metal, and as rustless steel or titanium, and the wall thickness of pipe can be thinner relatively, for example, and about 0.1-0.8 millimeter.When hands or the finger when applying power of operator with him, the 3c of pipe portion can relatively easily be out of shape or be crooked.Even repeated deformation in above-mentioned scope, the 3c of pipe portion is easy fracture not also, and can bear the relative long period, and the distortion of even now is not frequent appearance.When the 3c of pipe portion is that this situation is especially true when having the metal tube of above-mentioned wall thickness.
Connector part 3b has the diameter of increasing, and has internal whorl to be used for linking to each other with the far-end 5a of the handpiece body 5 that hereinafter will discuss.Top medicated cap 3d has external screw thread, and has been screwed into the far-end of the 3c of pipe portion with corresponding female thread.Shown in Fig. 2 and 3, top medicated cap 3d has the bearing 8 that is arranged in wherein, is used to contact and support the bearing contact portion 1B of cutting tool 1.More specifically, the lightening holes 1d of bearing contact portion 1B is installed in the inside race of bearing 8 snugly, and only the inside race by bearing 8 reclines mutually with step 1c.By such structure, cutting tool 1 is in place in jacket 3, and the rotation of cutting tool 1 can't be interfered.
Referring to Fig. 1, according to an aspect of the present invention, in cutting tool 1 is contained in jacket 3, cutting tool 1 can be exposed to the outside the underlined 1b ' in somewhere, for example, on the far-end of reinforcement 1b.On the other hand, jacket 3 also can be on its outer surface underlined 3b ', for example, on connector part 3b.Labelling 1b ' has identical color with 3b ', like this, operator can know at a glance in a plurality of cutting tools 1 which be with a plurality of jackets 3 in which is corresponding, and can not make mistakes.For this reason, when producing a plurality of head 10, the cutting tool 1 of different length is marked by different colors, and the jacket of different length also is marked by different colors, and the corresponding cutting tool of length is marked by identical color with jacket.Like this, even the different medical head 10 of a plurality of jacket length is arranged as the surgeon, and cutting tool 1 pulled down clean and when sterilizing, the surgeon can be complementary the support of cutting tool 1 with corresponding head 10 at an easy rate.Another kind is selected, can be being labelling 3b ' on the outer surface of handpiece body 5, to obtain identical advantage.
Insert 4 is piped, and is inserted between the shank 1e of the 3c of pipe portion of jacket 3 and cutting tool 1, that is, insert 4 is installed in pipe portion 3c inboard, and shank 1e is inserted in the insert 4, and is inserted into part 4 and holds.Insert 4 has played sliding bearing for shank 1e, is used to support cutting tool 1 around its longitudinal axis rotation.For this reason, insert 4 preferably has enough heat resistances and wearability.On the other hand, insert 4 should have enough pliabilities so that follow the ductility distortion of outer jacket 3.Consider these factors, insert 4 can be made by suitable synthetic resin such as fluororesin.
Handpiece body 5 has distal portions and proximal part 5a and 5b, handle 7, and around the torsion circle 6 of the part of handle 7.Distal portions 5a has external screw thread, and its female thread with connector part 3b is corresponding, is used for being threaded between jacket 3 and the handpiece body 5.Proximal part 5b is shaped to link to each other with drive part such as motor, and being used for driving cutting tool 1 to rotation provides power.Although not shown in the accompanying drawings, handpiece body 5 inside also have the chuck machinery, and it can be traditional structure.This chuck mechanism is removably fixed the near-end of the shank 1e of the cutting tool 1 that inserts through jacket 3, makes the cutting tool location, so that use.Chuck mechanism is configured to by operating with respect to handle 7 rotation torsion circles 6.For example, when torsion circle 6 turns clockwise with respect to handle 7, chuck mechanism unclamps, and allows cutting tool 1 to be removed.When torsion circle 6 is rotated counterclockwise with respect to handle 7, the chuck mechanism closure is fixed shank 1e, and cutting tool 1 can not be drawn out of.
When the 3c of pipe portion of jacket 3 Drawability was deformed into required curved shape, the shank 1e of cutting tool 1 and insert 4 were out of shape according to the deformation of the 3c of pipe portion, and the curved shape of the 3c of pipe portion is that surgical operation keeps.In this state, when cutting tool 1 is driven in rotation, shank 1e rotation, and partly contact with insert 4, for shank 1e, what insert 4 play a part is sliding bearing.Like this, even when the 3c of pipe portion of jacket 3 deforms, cutting tool 1 also can be under the situation of the inner surface that does not contact jacket 3 and rotation reposefully.
In order to use, the medical head 10 of said structure links to each other with drive part such as motor at proximal part 5b, and it is straight that the 3c of pipe portion keeps, or bend to required angle, shown in the arrow among Fig. 5.Operator is held the handle 7 of head 10, and expansion patient's nasal cavity is with the far-end insertion nasal cavity of head 10.When operator can be seen cutting tool 1 most advanced and sophisticated by the existing angle of the 3c of pipe portion, he rotatably drove cutting tool 1 and cutting treatment position.When operator was difficult to viewing tool 1 most advanced and sophisticated, he can extract head out from patient's nasal cavity, change the shape of the 3c of pipe portion extendingly, suitably adjusting the curvature of the 3c of pipe portion, and again head 10 was inserted nasal cavities with the cutting treatment position.
Fig. 6 shows another embodiment of cutting tool of the present invention.Cutting tool 20 has cutting stiletto 21a and bearing contact portion 22, and its corresponding component to cutting tool 1 shown in Figure 1 is similar, and shank 23.The distal portions 21 that comprises cutting stiletto 21a links to each other by bearing contact portion 22 integral body with shank 23, and bearing contact portion 22 has reinforcement 22b and lightening holes 22d, and the step 22c that forms between 22b and 22d.The labelling 22a that on reinforcement 22b, has predetermined color.
Shank 23 is different with the appropriate section of cutting tool 1, and has 23b of first and the second portion 23a that is positioned at the far-end of the 23b of first.When assembling cutting tool 1 was standby, the 23b of first was fixed in the chuck mechanism in the handpiece body 5.The diameter of second portion 23a is littler than the diameter of first 23b.This littler diameter allows second portion 23a to be easier to strain than first 23b.The preferred diameter of first and second portion 23b and 23a can change according to the length of shank 23, but for example, for the shank of about 100 millimeters long, the diameter of the 23b of first can be approximately 1 millimeter, and the diameter of second portion 23a can be approximately 0.8 millimeter.
By the second portion 23a of relative attenuate is provided on shank 23, even relatively short cutting tool 20, it will use with the corresponding short pipe portion of jacket, also can guarantee to have the pliability of enough selections, so that follow the Drawability distortion of pipe portion.
In this embodiment, although by the relative attenuate of second portion, compare with the 23b of first, the pliability of second portion 23a has obtained enhancing, as what those skilled in the art understood, this pliability can also be improved by other suitable manner or device.
The present invention is discussed, but the present invention is also applicable to the medical head of the cutting tool of any shank with the elongated tubular portion that has the jacket that removably inserts head with reference to the used drill bit of per nasal bone surgery.
By medical head of the present invention, only with hand or finger apply power, and the pipe portion of jacket can be deformed into required curved shape relatively easily extendingly.By such pipe portion that bends to required form, operator can utilize head to treat when observing the cutting tool tip, carries out surgical operation with the zone of using traditional head to be difficult to cut and becomes and be more prone to.
By do the labelling of same color on cutting tool and shank and/or handpiece body, even after a plurality of heads are taken apart together and cleaned, operator can promptly mate cutting tool and corresponding head rack.
In addition, by cutting tool of the present invention, the pliability of the selection of shank also is improved, so that, when cutting tool when using according to medical head of the present invention, shank is followed the ductility distortion of pipe portion that the jacket of shank is equipped with in inside more reposefully.

Claims (6)

1. medical head that is used for the cutting treatment position comprises:
Cutting tool with far-end and near-end, and this cutting tool has the shank of elongated flexible provides a stiletto at the described far-end of this cutting tool;
The common jacket in a tubular form that holds cutting tool wherein, and jacket has elongated pipe portion;
The insert that between the shank of the elongated tubular portion of jacket and cutting tool, inserts; And
The handpiece body that links to each other with jacket, and this handpiece body removably keeping the described near-end of cutting tool, and being used in the future, the driving force in self-driven source passes to cutting tool;
Wherein, there are ductility and deformable in the described elongated tubular portion of jacket, and the described shank of cutting tool and described insert are out of shape along with the distortion of the ductility of elongated tubular portion.
2. medical head according to claim 1 is characterized in that, described insert in a tubular form and pliable and tough.
3. medical head according to claim 1 is characterized in that described insert is made by fluororesin, and is used as the sliding bearing of the shank of cutting tool.
4. medical head according to claim 1 is characterized in that described cutting tool is underlined, and described jacket and/or described handpiece body have with cutting tool on the identical labelling of described marker color.
5. cutting tool that is used for medical head according to claim 1 comprises:
Be positioned at the stiletto of cutting tool far-end, be used for the cutting treatment position;
The shank of the elongated flexible of closely extending to stiletto; And
Bearing contact portion between stiletto and shank, this bearing contact portion is supported by the bearing in the medical head in the time of in cutting tool is installed in medical head;
Wherein, described shank has the intravital first of the head that is stuck in medical head, and has enough pliabilities so that than the second portion of the easier strain of described first.
6. cutting tool according to claim 5 is characterized in that the diameter of described second portion is littler than the diameter of first.
CN 200410005345 2004-02-11 2004-02-11 Medical engine head and its cutting tools Pending CN1654023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200410005345 CN1654023A (en) 2004-02-11 2004-02-11 Medical engine head and its cutting tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200410005345 CN1654023A (en) 2004-02-11 2004-02-11 Medical engine head and its cutting tools

Publications (1)

Publication Number Publication Date
CN1654023A true CN1654023A (en) 2005-08-17

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Application Number Title Priority Date Filing Date
CN 200410005345 Pending CN1654023A (en) 2004-02-11 2004-02-11 Medical engine head and its cutting tools

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109692055A (en) * 2017-10-23 2019-04-30 *** The ultra-fine diameter bone fixation needle of bushing type
CN111000614A (en) * 2019-12-31 2020-04-14 重庆西山科技股份有限公司 Visual medical abrasive drilling device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109692055A (en) * 2017-10-23 2019-04-30 *** The ultra-fine diameter bone fixation needle of bushing type
WO2019080769A1 (en) * 2017-10-23 2019-05-02 *** Sleeve-type superfine diameter osteofixation needle
CN109692055B (en) * 2017-10-23 2020-08-11 *** Sleeve type bone fixing needle with super-fine diameter
CN111000614A (en) * 2019-12-31 2020-04-14 重庆西山科技股份有限公司 Visual medical abrasive drilling device

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