CN109965936A - A kind of length-adjustable drill bit structure - Google Patents
A kind of length-adjustable drill bit structure Download PDFInfo
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- CN109965936A CN109965936A CN201910255303.0A CN201910255303A CN109965936A CN 109965936 A CN109965936 A CN 109965936A CN 201910255303 A CN201910255303 A CN 201910255303A CN 109965936 A CN109965936 A CN 109965936A
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- telescopic rod
- main body
- drill main
- rotation
- block piece
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- 238000005553 drilling Methods 0.000 claims abstract description 26
- 230000000903 blocking effect Effects 0.000 claims description 42
- 230000002459 sustained effect Effects 0.000 claims description 3
- 230000036461 convulsion Effects 0.000 claims description 2
- 206010028347 Muscle twitching Diseases 0.000 claims 1
- 210000000988 bone and bone Anatomy 0.000 abstract description 12
- 241001074085 Scophthalmus aquosus Species 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 3
- 210000001624 hip Anatomy 0.000 description 2
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 238000011540 hip replacement Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1662—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1664—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body for the hip
- A61B17/1666—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body for the hip for the acetabulum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of length-adjustable drill bit structure, comprising: drill main body, telescopic rod, the first fit structure, the second fit structure and end cap；Telescopic rod can be plugged into inside drill main body, drive drill main body rotation drilling by the first fit structure；When needing drilling deep hole, it telescopic rod can be operated is displaced outwardly certain length and connect with drill main body to no longer passing through the first fit structure, then it is connect by the second fit structure with drill main body, after extending to certain length, telescopic rod is squeezed by end cap and is fixed, driving telescopic rod rotation drilling at this time, so as to inside the acetabular bone that acetabular development is small or hypogenetic space is more narrow, carry out the operation that deeper acetabular bone screw drills in advance, and then it solves in the prior art, acetabular development is small or hypogenetic acetabular cup in operate, if using long soft brill, the operating difficulties in acetabular cup, when using short soft brill instead, there is the problems such as drilling depth is inadequate again.
Description
Technical field
The present invention relates to a kind of drill bits, and in particular to a kind of length-adjustable Medical bit structure.
Background technique
Replacement of total hip alleviates the pain of many Hip disease patients, improves the function of hip joint, improves
The quality of life of patient.Undesirable patient is covered for severe osteoporosis patient and acetabular bone, in order to increase the initial of acetabular bone
Stability often needs to squeeze into acetabular bone screw, before squeezing into acetabular bone screw, needs to play screw in acetabular cup and drills in advance.Have
A little patients, acetabular development is small or depauperation, acetabular cup need to use the following mortar cup of diameter 44mm, plays the pre- subdrilling of acetabular bone screw at this time
Kong Shi, if using long soft brill, the operating difficulties in acetabular cup, when using short soft brill instead, and not enough etc. there are drilling depth
Problem.
Summary of the invention
Therefore, the technical problem to be solved by the present invention is to acetabular development is small or hypogenetic acetabular bone in, it is pre- to play screw
When first drilling, if using long soft brill, the operating difficulties in acetabular cup, when using short soft brill instead, and there are drilling depths not
Enough technological deficiencies facilitate drilling operation to provide a kind of length-adjustable Medical bit.
For this purpose, the present invention provides a kind of length-adjustable Medical bit, comprising:
Drill main body, middle part have inner cavity open at one end, and outer wall is equipped with bore screw；
Telescopic rod is axially retractably installed in the inner cavity along the drill main body；
First fit structure, be arranged in the telescopic rod for being inserted into the end and the inner cavity of described inner cavity one end
Inside far from opening side；The telescopic rod drives the drill main body rotation by first fit structure；
Second fit structure is arranged between the outer wall of the telescopic rod and the inner wall of the inner cavity；The telescopic rod to
For outer mobile certain length to after no longer being connect by first fit structure with the drill main body, the telescopic rod passes through institute
It states the second fit structure to stretch in the inner cavity, to change the length of drill bit structure；
End cap, fastening are mounted on the drill main body, close the inner cavity for covering, and prevent the telescopic rod from described
It is skidded off in inner cavity；After the telescopic rod stretches out setting length, it can be squeezed and be fixed to and the drill bit master by the end cap
Body is fixedly connected.
As a preferred embodiment, first fit structure includes:
First block piece, at least one, are arranged on the end outer wall of the telescopic rod；
Second block piece, at least one, are arranged on the inner wall of the inner cavity；
When the telescopic rod is inserted into the inner cavity set depth, at first block piece and second block piece
In sustained height, at this time when the telescopic rod Forced rotation, the brill can be driven by the first block piece, second block piece
Head body rotation drilling.
As a preferred embodiment, first block piece has the first blocking surface, and second block piece has second
Blocking surface；
When the telescopic rod Forced rotation, the second of the first blocking surface of first block piece and second block piece
Stop face contact, drives the drill main body rotation drilling.
As a preferred embodiment, first blocking surface and second blocking surface are plane, and described first stops
When face and the second blocking face contact, the telescopic rod is twitched outward, first blocking surface can be relative to described second
Blocking surface, which slides into, to be kept completely separate, and the telescopic rod rotation no longer drives the drill main body to rotate at this time.
As a preferred embodiment, the side of second block piece opposite with second blocking surface, being equipped with can
Accommodate the step structure of first block piece；
It, can by telescopic rod described in pull when first block piece is rotated backward to the entrance step structure
The drill main body is extracted out.
As a kind of deformation design, second fit structure includes:
First rotation screw thread, is arranged on the telescopic rod outer wall；
Second rotation screw thread, is arranged on the interior cavity wall；
The telescopic rod by first fit structure connect with the drill main body when, it is described first rotate screw thread and
The second rotation screw thread does not contact；
The telescopic rod is drawn to certain length outward, is no longer connected by first fit structure and the drill main body
After connecing, the first rotation screw thread rotates thread contact and can cooperate with described second to be spirally connected；
It drives the telescopic rod rotation to be threadedly engaged the first rotation screw thread with second rotation, and then makes described
The outwardly directed direction of rotation of telescopic rod, with the rotation side for driving the telescopic rod to drive the drill main body rotary drilling in turn
To identical；
The outer diameter of the first rotation screw thread is greater than the open end internal diameter of the end cap.
As a preferred embodiment, the end cap includes end cover body, and is molded on the inner wall of described end cover body one end
Annular flange.
As a preferred embodiment, the end cover body inner wall is equipped with internal screw thread, and the drill main body has inner cavity
The end outer wall of opening is equipped with external screw thread, and the end cover body is by internal screw thread and the external thread bolt connection, thus fixed peace
On the drill main body.
Above-mentioned technical proposal of the invention has the advantages that
1, length-adjustable drill bit structure of the invention, telescopic rod can be plugged into inside drill main body, pass through the first cooperation
Structure drives drill main body rotation drilling；When needing to bore deeper hole, telescopic rod can be operated and be displaced outwardly certain length to not
It is connect again by the first fit structure with drill main body, is then connect by the second fit structure with drill main body, extend to one
After measured length, telescopic rod is squeezed by end cap and is fixed, and drives telescopic rod rotation at this time, can pass through the second fit structure and end cap
Cooperation, driving drill main body rotation drilling, so as in the acetabular bone that acetabular development is small or hypogenetic space is more narrow
Inside carries out the operation that deeper acetabular bone screw drills in advance, and then solves in the prior art, acetabular development is small or depauperation
Acetabular cup in operation, if using long soft brill, when using short soft brill instead, and there is drilling in the operating difficulties in acetabular cup
The problems such as depth is inadequate.
2, length-adjustable drill bit structure of the invention, first fit structure is by being arranged in the end of the telescopic rod
The first block piece on portion's outer wall is formed with the second block piece being arranged on the inner wall of the inner cavity, telescopic rod Forced rotation
When, drill main body rotation drilling can be driven by the first block piece, the second block piece, driving method is simple and convenient.
3, length-adjustable drill bit structure of the invention, preferably the first blocking surface and the second blocking surface are plane, outward
The telescopic rod is twitched, the first blocking surface can be realized is slid into relative to second blocking surface and be kept completely separate, first stops
The disengaging mode of face and the second blocking surface is simple and fast.
4, length-adjustable drill bit structure of the invention, second block piece side opposite with the second blocking surface, if
There is the step structure that can accommodate first block piece, when the first block piece is rotated backward to the entrance step structure
When, telescopic rod described in outside pull can extract the drill main body out, and the setting is so that drill bit meets obstructions exiting outward
When, drill main body is driven by telescopic rod, more can easily extract drill main body out.
5, length-adjustable drill bit structure of the invention, the first rotation screw thread of the second fit structure and the second rotation screw thread
Cooperation, and the outwardly directed direction of rotation of telescopic rod drive the drill main body rotary drilling with the telescopic rod is driven in turn
Direction of rotation it is identical, can be avoided driving telescopic rod when rotating outward stretching, drive drill main body reversely to produce, this screw thread
Structure setting can make telescopic rod during rotating outward stretching, remain the work that driving drill main body drills inwards
Firmly.
6, length-adjustable drill bit structure of the invention, the setting of the end cap annular flange can be tied with the second cooperation
Structure combines, and telescopic rod extruding is fixed to and is fixedly connected with the drill main body, prevents telescopic rod from sliding from inner cavity, and pass through
The rotation of telescopic rod drives drill main body rotation.
7, length-adjustable drill bit structure of the invention, the end cover body pass through the external screw thread of internal screw thread and drill main body
It is spirally connected, this fixed form securely facilitates.
Detailed description of the invention
In order to illustrate more clearly of the technical solution in the specific embodiment of the invention, specific embodiment is described below
Used in attached drawing be briefly described.
Fig. 1 is the sectional view of the drill main body of the length-adjustable drill bit structure of the present invention.
Fig. 2 is the perspective view of telescopic rod.
Fig. 3 is the perspective view of end cap.
Appended drawing reference: 1, drill main body；2, inner cavity；3, telescopic rod；4, end cap；41, end cover body；42, annular flange；5,
First block piece；6, the second block piece；7, the first blocking surface；8, the second blocking surface；9, step structure；10, the first rotation screw thread；
11, the second rotation screw thread.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawings of the specification.
Embodiment
The present embodiment provides a kind of length-adjustable drill bit structures, as shown in Figs. 1-3, comprising: drill main body 1, middle part tool
There is inner cavity 2 open at one end, outer wall is equipped with bore screw；Telescopic rod 3 is axially telescopically installed along the drill main body 1
In the inner cavity 2；End and the institute for being used to be inserted into described 2 one end of inner cavity of the telescopic rod 3 is arranged in first fit structure
State the inside of the separate opening side of inner cavity 2；The telescopic rod 3 drives the drill main body 1 by first fit structure
Rotation；Second fit structure is arranged between the outer wall of the telescopic rod 3 and the inner wall of the inner cavity 2；The telescopic rod 3 to
It is moved to certain length outside to after no longer connecting by first fit structure with the drill main body 1, the telescopic rod 3 is logical
It crosses second fit structure to stretch in the inner cavity 2, to change the length of drill bit structure；End cap 4, fastening are mounted on institute
It states on drill main body 1, closes the inner cavity 2 for covering, and the telescopic rod 3 is prevented to skid off from the inner cavity 2；The telescopic rod
After 3 stretch out setting length, it can be fixed to by the end cap 4 extruding and be fixedly connected with the drill main body 1.
The length-adjustable drill bit structure of the present embodiment, through driving telescopic rod 3 before 2 inside of the inner cavity of drill main body 1
After move, the length adjustment of drill bit may be implemented, in hip replacement surgery, for small or hypogenetic in acetabular development
Acetabular bone, when solution plays acetabular bone screw and drills in advance, soft drill-through length is not easy to operate or too short drilling depth is inadequate problem.
As depicted in figs. 1 and 2, first fit structure includes: the first block piece 5, at least one, is arranged described
On the end outer wall of telescopic rod 3；Second block piece 6, at least one are arranged on the inner wall of the inner cavity 2；The telescopic rod
When the 3 insertion 2 inner setting depth of inner cavity, first block piece 5 is in sustained height with second block piece 6, this
When Shi Suoshu 3 Forced rotation of telescopic rod, 1 turn of the drill main body can be driven by the first block piece 5, second block piece 6
Dynamic drilling.
First block piece 5 has the first blocking surface 7, and second block piece 6 has the second blocking surface 8；It is described to stretch
When contracting 3 Forced rotation of bar, the first blocking surface 7 of first block piece 5 connects with the second blocking surface 8 of second block piece 6
Touching drives the rotation of drill main body 1 drilling.The rotation of drill main body 1 is driven to bore by the first block piece 5, the second block piece 6
Hole, this driving method are simple and convenient.
The length-adjustable drill bit structure of the present embodiment, first blocking surface 7 and second blocking surface 8 are flat
The telescopic rod 3, first blocking surface 7 are twitched outward when first blocking surface 7 is contacted with second blocking surface 8 in face
It can slide into and be kept completely separate relative to second blocking surface 8, the rotation of telescopic rod 3 no longer drives the drill bit master at this time
Body 1 rotates.First blocking surface 7 and the second blocking surface 8 are plane, twitch the telescopic rod 3 outward, the first blocking can be realized
Face 7 slides into relative to second blocking surface 8 and is kept completely separate, and this disengaging mode is simple and fast.
Further preferred embodiment is, in the side of second block piece 6 opposite with second blocking surface 8, if
There is the step structure 9 that can accommodate first block piece 5；First block piece 5 is rotated backward to the entrance Step-edge Junction
When 9 inside of structure, by telescopic rod 3 described in pull, the drill main body 1 can be extracted out.The setting is so that drill bit is exiting outward
When meeting obstructions, drill main body 1 is driven by telescopic rod 3, resistance more can be easily overcome, to extract drill main body 1 out.
The length-adjustable drill bit structure of the present embodiment, second fit structure specifically include: the first rotation screw thread 10,
It is arranged on 3 outer wall of telescopic rod；Second rotation screw thread 11, is arranged on 2 inner wall of inner cavity；The telescopic rod 3 passes through
When first fit structure is connect with the drill main body 1, the first rotation screw thread 10 and the second rotation screw thread 11
It does not contact；The telescopic rod 3 is drawn to certain length outward, no longer passes through first fit structure and the drill main body 1
After connection, the first rotation screw thread 10 contacts and can cooperate with the second rotation screw thread 11 and is spirally connected；It drives described flexible
The rotation of bar 3 cooperates the first rotation screw thread 10 and the second rotation screw thread 11, and then keeps the telescopic rod 3 protruding
Direction of rotation, and drive the telescopic rod 3 and then drive the direction of rotation of 1 rotary drilling of drill main body identical；It is described
The outer diameter of first rotation screw thread 10 is greater than the open end internal diameter of the end cap 4.
First rotation screw thread 10 of the second fit structure and the second rotation screw thread 11 cooperate, and telescopic rod 3 is outwardly directed
Direction of rotation drives the direction of rotation of 1 rotary drilling of drill main body identical, can keep away in turn with the telescopic rod 3 is driven
When the dynamic telescopic rod 3 of free drive rotates outward stretching, drill main body 1 is driven reversely to produce, this helicitic texture setting can make to stretch
Bar 3 remains the active force that driving drill main body 1 drills inwards during rotating outward stretching.
The length-adjustable drill bit structure of the present embodiment, the end cap 4 includes end cover body 41, and is molded over the end cap
Annular flange 42 on 41 one end inner wall of main body.Annular flange 42 can be combined with the second fit structure, and telescopic rod 3 is squeezed
It is fixed to and is fixedly connected with the drill main body 1, prevent telescopic rod 3 from slipping from inner cavity 20, and pass through the rotation of telescopic rod 3, band
Dynamic drill main body 1 rotates.
41 inner wall of end cover body is equipped with internal screw thread, the end outer wall with lumen openings of the drill main body 1
It is equipped with external screw thread, the end cover body 41 is by internal screw thread and the external thread bolt connection, to be fixedly mounted on the drill bit
In main body 1.The end cover body passes through the external thread bolt connection of internal screw thread and drill main body, and this fixed form securely facilitates
The working principle of the present embodiment length is adjustable drill bit structure is as follows:
When the depth for needing to drill is shallower, can not have to start extension mechanism by telescopic rod 3, telescopic rod 3 is directly inserted
Enter to 1 bottom end of drill main body, connect by the first fit structure with drill main body 1, after starting electric drill, electric drill passes through the first cooperation
Structure, driving telescopic rod 3 drive drill main body 1 to rotate, complete shallower drilling；
When needing the depth that drills deeper, in doing so, first electric drill is stopped, by telescopic rod 3 toward withdrawing,
It is no longer connect to telescopic rod 3 by the first fit structure with drill main body 1, then proceedes to starting electric drill, telescopic rod 3 passes through second
First rotation screw thread 10 of fit structure is matched with the second rotation screw thread 11 on drill main body, rotates outward telescopic rod 3
It stretches out, gradually increases the length of drill bit, until reaching end cap 4, the extruding of telescopic rod 3 is fixed to and the drill main body 1 by end cap 4
It is fixedly connected, the telescopic rod 3 of electric drill driving at this time can directly drive drill main body 1 to rotate, and complete deeper drilling.
When withdrawing from drill bit, drill bit is first rotated backward, and drill main body 1 shortens automatically, then slightly fixed drill bit main body 1, is continued
It rotates backward, when telescopic rod 3 advances into 9 inside of step structure, telescopic rod 3 described in pull can be by the drill main body 1
Extraction.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (8)
1. a kind of length-adjustable drill bit structure, it is characterised in that: include:
Drill main body (1), middle part have inner cavity (2) open at one end, and outer wall is equipped with bore screw；
Telescopic rod (3) is axially retractably installed in the inner cavity (2) along the drill main body (1)；
First fit structure is arranged in the telescopic rod (3) for being inserted into the end and the inner cavity of the inner cavity (2) one end
(2) inside of separate opening side；The telescopic rod (3) drives the drill main body (1) by first fit structure
Rotation；
Second fit structure is arranged between the outer wall of the telescopic rod (3) and the inner wall of the inner cavity (2)；The telescopic rod
(3) certain length is displaced outwardly to after no longer connecting by first fit structure with the drill main body (1), it is described flexible
Bar (3) is stretched in the inner cavity (2) by second fit structure, to change the length of drill bit structure；
End cap (4), fastening are mounted on the drill main body (1), close the inner cavity (2) for covering, and prevent the telescopic rod
(3) it is skidded off from the inner cavity (2)；After the telescopic rod (3) stretches out setting length, it can be squeezed by the end cap (4)
It is fixed to and is fixedly connected with the drill main body (1).
2. drill bit structure according to claim 1, it is characterised in that: first fit structure includes:
First block piece (5), at least one are arranged on the end outer wall of the telescopic rod (3)；
Second block piece (6), at least one are arranged on the inner wall of the inner cavity (2)；
When the telescopic rod (3) is inserted into inner cavity (2) the inner setting depth, first block piece (5) and second resistance
Block piece (6) is in sustained height, at this time when telescopic rod (3) Forced rotation, can pass through the first block piece (5), described second
Block piece (6) drives drill main body (1) the rotation drilling.
3. drill bit structure according to claim 2, it is characterised in that: first block piece (5) has the first blocking surface
(7), second block piece (6) has the second blocking surface (8)；
When telescopic rod (3) Forced rotation, the first blocking surface (7) and second block piece of first block piece (5)
(6) the second blocking surface (8) contact drives the drill main body (1) rotation drilling.
4. drill bit structure according to claim 3, it is characterised in that: first blocking surface (7) and described second stops
Face (8) is plane, when first blocking surface (7) and second blocking surface (8) contact, twitches the telescopic rod outward
(3), first blocking surface (7) can slide into relative to second blocking surface (8) and be kept completely separate, at this time the telescopic rod
(3) rotation no longer drives the drill main body (1) to rotate.
5. drill bit structure according to claim 3 or 4, it is characterised in that: with opposite described of second blocking surface (8)
The side of second block piece (6), equipped with the step structure (9) that can accommodate first block piece (5)；
When first block piece (5) rotates backward internal to the entrance step structure (9), pass through telescopic rod described in pull
(3), the drill main body (1) can be extracted out.
6. drill bit structure according to claim 1, it is characterised in that: second fit structure includes:
First rotation screw thread (10), is arranged on the telescopic rod (3) outer wall；
Second rotation screw thread (11), is arranged on the inner cavity (2) inner wall；
When the telescopic rod (3) is connect by first fit structure with the drill main body (1), the first rotation screw thread
(10) it is not contacted with second rotation screw thread (11)；
The telescopic rod (3) is drawn to certain length outward, no longer passes through first fit structure and the drill main body (1)
After connection, first rotation screw thread (10) contacts and can cooperate with second rotation screw thread (11) and is spirally connected；
The telescopic rod (3) rotation is driven to make first rotation screw thread (10) and the second rotation screw thread (11) cooperation, into
And make the telescopic rod (3) outwardly directed direction of rotation, the drill main body is driven in turn with the telescopic rod (3) is driven
(1) direction of rotation of rotary drilling is identical；
The outer diameter of first rotation screw thread (10) is greater than the open end internal diameter of the end cap (4).
7. drill bit structure according to claim 1, it is characterised in that: the end cap (4) includes end cover body (41), and at
Annular flange (42) of the type on the inner wall of the end cover body (41) one end.
8. drill bit structure according to claim 7, it is characterised in that: end cover body (41) inner wall is equipped with interior spiral shell
Line, the end outer wall with lumen openings of the drill main body (1) are equipped with external screw thread, and the end cover body (41) passes through interior
Screw thread and the external thread bolt connection, to be fixedly mounted on the drill main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255303.0A CN109965936B (en) | 2019-04-01 | 2019-04-01 | Length-adjustable drill bit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255303.0A CN109965936B (en) | 2019-04-01 | 2019-04-01 | Length-adjustable drill bit structure |
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| Publication Number | Publication Date |
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| CN109965936A true CN109965936A (en) | 2019-07-05 |
| CN109965936B CN109965936B (en) | 2023-06-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115363685A (en) * | 2022-08-08 | 2022-11-22 | 北京市春立正达医疗器械股份有限公司 | A medical high-speed grinding drill with a coaxial rotating telescopic structure |
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| CN1728969A (en) * | 2002-11-13 | 2006-02-01 | 拉尔夫·F·兹沃曼 | Adjustable length tap and method for drilling and tapping holes in bone |
| CN1984610A (en) * | 2004-03-30 | 2007-06-20 | 新特斯(美国)公司 | Adjustable depth drill bit |
| JP2012010758A (en) * | 2010-06-29 | 2012-01-19 | Japan Medical Materials Corp | Boring drill and drill system |
| CN202604948U (en) * | 2012-05-25 | 2012-12-19 | 罗世兴 | Adjustable-length bone surgery drill bush |
| CN105342662A (en) * | 2015-09-30 | 2016-02-24 | 张英泽 | Adjustable limit safety drilling device for orthopedic department |
| CN109350271A (en) * | 2018-11-27 | 2019-02-19 | 尹文婷 | A kind of inverted cone bur for teeth restoration |
| CN210130889U (en) * | 2019-04-01 | 2020-03-10 | 山东大学齐鲁医院(青岛) | Medical drill bit structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115363685A (en) * | 2022-08-08 | 2022-11-22 | 北京市春立正达医疗器械股份有限公司 | A medical high-speed grinding drill with a coaxial rotating telescopic structure |
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| CN109965936B (en) | 2023-06-27 |
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