CN107307900A - A kind of screw broken nail nail-fetching device - Google Patents
A kind of screw broken nail nail-fetching device Download PDFInfo
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- CN107307900A CN107307900A CN201710707006.6A CN201710707006A CN107307900A CN 107307900 A CN107307900 A CN 107307900A CN 201710707006 A CN201710707006 A CN 201710707006A CN 107307900 A CN107307900 A CN 107307900A
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- screw
- nail
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- direct tube
- clamping jaw
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B2017/922—Devices for impaction, impact element
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- Orthopedic Medicine & Surgery (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
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Abstract
The invention discloses a kind of screw broken nail nail-fetching device, its drip irrigation device is to include trepan, take nail to cover and take blind rivet, nail set is taken to include outer direct tube section, conical cylinder section and through outer direct tube section and the spliced eye of conical cylinder section, the big opening end of conical cylinder section is connected with the end face of outer direct tube section, blind rivet is taken to include interior direct tube section and collapsible section, internal thread is provided with outer direct tube section, external screw thread is provided with interior direct tube section, collapsible section includes clamping jaw, clamping jaw is made up of elastomeric material, clamping jaw is formed with collapsible groove between being provided with the multiple and clamping jaw of arbitrary neighborhood two, outer direct tube section relative to interior direct tube section rotate when, collapsible section can be contracted to pinching screw under the inwall effect of conical cylinder section.When taking out screw with the screw broken nail nail-fetching device, whole bone is ground saturating by the direction that trepan needs not be along screw length, and the aperture after polishing need not be very big, therefore, it is possible to take out feather plucking or the screw of fracture in the case of the injury caused to bone is less.
Description
Technical field
The present invention relates to a kind of medical instruments field, more particularly to a kind of screw broken nail nail-fetching device.
Background technology
When fracture accident occurs for people, it usually needs Medical screw is squeezed into fracture, when being further taken out after union
Screw, if overlong time of the screw in human body, the fatigue strength of screw reaches capacity, when medical worker is taking out screw,
Screw easily occurs after feather plucking or the phenomenon twisted into two parts, screw feather plucking or fracture, and medical worker stills need to take out screw.Tradition
Taking-up feather plucking or the side of screw of fracture mainly have two kinds:
One is to be polishing to trepan along screw length direction by bone mill thoroughly, further takes out screw, this method is needed along spiral shell
Whole bone is ground saturating by the direction for following closely length, the operating time length and injury caused to bone is big, or even occurs second fracture etc.
Situation.
Two be a segment distance of first being polished inwards along screw at the opening of screw with trepan, then will with instruments such as pliers
Screw is screwed out, and whole bone is ground saturating by the direction that this method needs not be along screw length, need to only be beaten along the length direction of screw
The distance that screw is captured for pliers is ground, is polished yet with needing to stretch on pliers in hole, therefore polishing hole needs to beat
That grinds is very big, and the injury caused to bone is big, and when screw and bone are completely embedded, pliers will be difficult to screw out screw.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of screw broken nail nail-fetching device, the screw
Broken nail nail-fetching device can take out feather plucking or the screw of fracture in the case of the injury caused to bone is less.
To achieve the above object, the invention provides following technical scheme：A kind of screw broken nail nail-fetching device, including can
The trepan that is ground along screw length direction to the bone around screw and bone can be stretched into along screw length direction
It is interior take nail cover and can screw in take nail cover in take blind rivet, it is described to take blind rivet to be plugged in take in nail set and between the two
Dismounting connection, it is described to take nail set to include outer direct tube section, conical cylinder section and through outer direct tube section and the spliced eye of conical cylinder section, it is described
Blind rivet is taken to be plugged in spliced eye, the big opening end of the conical cylinder section is connected with the end face of outer direct tube section, the conical cylinder section
Small openend internal diameter be adapted with screw diameter；
It is described to take blind rivet to include the interior direct tube section being plugged in outer direct tube section and be connected with the end face of interior direct tube section
Collapsible section, be provided with internal thread in the spliced eye, it is described to take the external screw thread for being provided with and being adapted with internal thread in blind rivet,
Described collapsible section includes and can contact at the clamping jaw of spliced eye inwall, and the clamping jaw is made up of elastomeric material, and the clamping jaw is set
It is equipped with multiple and is annularly uniformly distributed along the end face of interior direct tube section, collapsible groove is formed between two clamping jaws of arbitrary neighborhood,
Collapsible section can shrink internal diameter under the inwall effect of conical cylinder section during the interior direct tube section rotates in outer direct tube section
Until pinching screw.
As a further improvement on the present invention, the medial surface that the clamping jaw is in contact with screw is configured to increase and spiral shell
On the curved surface of the contact area of nail, and cross section on the length direction of clamping jaw, the outline that the curved surface is constituted is camber line.
As a further improvement on the present invention, folder can be increased by being provided with the medial surface that the clamping jaw is in contact with screw
The raised line of frictional force between pawl and screw, the length direction of the raised line is identical with the length direction of clamping jaw, the raised line
Cross section is set to triangle, and the raised line is provided with multiple and along clamping jaw medial surface and is circlewise distributed.
As a further improvement on the present invention, the outer direct tube section includes the first guide section and the first thread segment, described
The medial surface of first guide section is the smooth face of cylinder, and first guide section is located between conical cylinder section and the first thread segment, and
The junction of the medial surface of first guide section and the medial surface of conical cylinder section is provided with rounding.
As a further improvement on the present invention, the interior direct tube section includes the second guide section and the second thread segment, described
The lateral surface of second guide section is the smooth face of cylinder, and second guide section is located between collapsible section and the second thread segment.
As a further improvement on the present invention, between the first guide section front end and the first thread segment rear end away from
From more than the distance between the clamping jaw front end and described second guide section rear end, it is described screw into the internal thread she
Begin, the clamping jaw front end is connected on the medial surface of the first guide section.
As a further improvement on the present invention, it is described to take nail to put to be provided with two and be easy to rotate take nail to cover first-hand
Handle, the first handle includes first hand and the first connecting pole, one end and the first hand of first connecting pole
It is detachably connected by screw thread, the other end is fixedly connected with outer direct tube section lateral surface, and the central axis position of two first handles
In on same straight line.
As a further improvement on the present invention, described take is provided with two and is easy to rotate the second-hand for taking blind rivet in blind rivet
Handle, the second handle includes second hand and the second connecting pole, and described second connecting pole one end leads to second hand
Cross screw thread to be detachably connected, the other end is fixedly connected with the lateral surface of interior direct tube section, and the central axis position of two second handles
In on same straight line.
As a further improvement on the present invention, the outer surface of the first hand and the second hand is respectively provided with
For the male and fomale(M＆F) of frictional force can be increased.
As a further improvement on the present invention, the first handle can with being provided with the end face of the second handle
Reduce the cavity of handle weight.
Beneficial effects of the present invention：By take nail cover on be provided with conical cylinder section and outer direct tube section, taking in blind rivet set
There are collapsible section and interior direct tube section, its China and foreign countries' direct tube section and interior direct tube section are connected through a screw thread so that interior direct tube section is in outer straight tube
Collapsible section can shrink internal diameter until pinching screw under the inwall effect of conical cylinder section during being rotated in section.When screw exists
When the interior fracture of bone or feather plucking, first the bone around screw is polished along screw length direction with trepan, then will
Take nail to cover and take blind rivet to be set on the outer surface of screw, then back rotation takes nail to cover so that take the clamping jaw of blind rivet front end in cone
Pinching screw is flexed up under the inwall effect of cylinder section, finally rotation takes blind rivet, drives screw rotation to take screw out of bone
Go out, when being polished with trepan bone, need to only be polished along screw length direction can clamp the distance of screw for clamping jaw
, it is not necessary to bone is ground saturating, grinding depth is reduced, as long as and the hole that polish for taking nail set can extend into, when
Take nail cover external diameter set it is smaller when, the aperture in the hole polished can be with very little, and the screw broken nail nail-fetching device, which is realized, to be subtracted
Also the screw of fracture or feather plucking can be taken out when the depth and diameter in the small hole polished with trepan so as to the bone of patient
The injury caused is smaller, and patient is easier to recover.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of screw broken nail nail-fetching device；
Fig. 2 is the sectional view for taking nail to cover；
Fig. 3 is the dimensional structure diagram for taking blind rivet；
Fig. 4 is the dimensional structure diagram of clamping jaw；
Fig. 5 is the structural representation of clamping jaw.
Reference：1st, nail is taken to cover；11st, outer direct tube section；111st, the first guide section；112nd, the first thread segment；12nd, cone cylinder
Section；13rd, spliced eye；14th, internal thread；15th, first handle；151st, first hand；152nd, the first connecting pole；153rd, male and fomale(M＆F)；
154th, cavity；2nd, blind rivet is taken；21st, interior direct tube section；211st, the second guide section；212nd, the second thread segment；22nd, collapsible section；221、
Clamping jaw；222nd, collapsible groove；223rd, curved surface；224th, raised line；23rd, external screw thread；24th, second handle；241st, second hand；242、
Second connecting pole.
Embodiment
With reference to the accompanying drawings and examples, the present invention is described in more detail.Wherein identical parts identical
Reference is represented.It should be noted that the word "front", "rear", "left", "right", the "up" and "down" that are used below in description
The direction in accompanying drawing is referred to, word " bottom surface " and " top surface ", " interior " and " outer " are referred respectively to towards or away from particular elements
The direction of geometric center.
Referring to figs. 1 to shown in 5, a kind of screw broken nail nail-fetching device of the present embodiment, including can be along screw length side
Trepan that bone to around to screw is ground and can be stretched into along screw length direction in bone taking nail set 1 with
And can screw in take nail set 1 in take blind rivet 2, take blind rivet 2 be plugged in take nail set 1 in and be detachably connected between the two, take
Nail set 1 includes outer direct tube section 11, conical cylinder section 12 and through outer direct tube section 11 and the spliced eye 13 of conical cylinder section 12, takes blind rivet 2
It is plugged in spliced eye 13, the big opening end of conical cylinder section 12 is connected with the end face of outer direct tube section 11, the screw broken nail takes nail
Device is set to many sets, and the big opening end of its conical cylinder section 12 of different set of screw broken nail nail-fetching device is different from the internal diameter of small openend,
The small openend internal diameter and screw diameter identical screw broken nail nail-fetching device of conical cylinder section 12 may be selected when using, nail set 1 is now taken
It can be set on the outer surface of screw；
Blind rivet 2 is taken to include the interior direct tube section 21 that is plugged in outer direct tube section 11 and the end face with interior direct tube section 21
Internal thread 14 is provided with connected collapsible section 22, spliced eye 13, takes and be adapted with internal thread 14 outer is provided with blind rivet 2
Screw thread 23 so that take blind rivet 2 with taking nail set 1 can be rotatably connected, collapsible section 22 includes and can contact at the inwall of spliced eye 13
Clamping jaw 221, clamping jaw 221 is made up of phosphor bronze elastomeric material, and clamping jaw 221 is provided with multiple and along one end of interior direct tube section 21
Face is annularly uniformly distributed, and collapsible groove 222 is formed between two clamping jaws 221 of arbitrary neighborhood, interior direct tube section 21 is in outer direct tube section
Collapsible section 22 can shrink internal diameter until pinching screw under the inwall effect of conical cylinder section 12 during being rotated in 11.Pass through
The connected mode of threaded connection, can be achieved being detachably connected between taking blind rivet 2 and taking nail set 1, when the screw broken nail nail-fetching device
During sterilization, it can will take blind rivet 2 and take nail block to separate sterilization, sterilization is more thorough, and effect is more preferable, and when the screw broken nail nail-fetching device
In storage or transport, blind rivet 2 can will be taken to screw in and taken in nail set 1 so that take the clamping jaw 221 in blind rivet 2 to be hidden in and take nail
In set 1, clamping jaw 221 will not directly be contacted with foreign object so that clamping jaw 221 is hardly damaged, and due to the small openend of conical cylinder section 12
Internal diameter is identical with screw diameter, and when 221 pinching screw of clamping jaw, clamping jaw 221 will not stretch out out of conical cylinder section 12 so that take nail
During, clamping jaw 221 is always positioned at taking in nail set 1, and clamping jaw 221 is added the screw by taking the protection of nail set 1 to be hardly damaged
The service life of broken nail nail-fetching device.
When screw is broken in bone or during feather plucking, first with trepan along screw length direction to the bone around screw
Polished, will then take nail set 1 and take blind rivet 2 to be set on the outer surface of screw, then rotation takes nail set 1 so that take blind rivet 2
The clamping jaw 221 of front end is flexed up to pinching screw under the inwall effect of conical cylinder section 12, and finally rotation takes blind rivet 2, drives screw
Rotation takes out screw out of bone, when being polished with trepan bone, and need to only be polished along screw length direction can
The distance of screw is clamped for clamping jaw 221, it is not necessary to bone is ground saturating, grinding depth is reduced, as long as and the hole that polish
For taking nail set 1 to can extend into, when the external diameter for taking nail set 1 set it is smaller when, the aperture in the hole polished can be with very little, should
Screw broken nail nail-fetching device can also take out fracture or beat when realizing depth and the diameter in the hole polished in reduction with trepan
The screw of hair so that the injury caused to the bone of patient is smaller, patient is easier to recover.
As a kind of improved embodiment, the medial surface that clamping jaw 221 is in contact with screw is set to curved surface 223,
And on the cross section on the length direction of clamping jaw 221, the outline that curved surface 223 is constituted is camber line, because the side of screw is
Curved surface 223, when the medial surface that clamping jaw 221 is in contact with screw is set to curved surface 223 and can increase 221 pinching screw of clamping jaw,
The contact area of clamping jaw 221 and screw so that the pinching screw that clamping jaw 221 can be fastened more, is difficult between screw and clamping jaw 221
Skid so that smoothly can be screwed out screw out of bone after the pinching screw of clamping jaw 221.
As a kind of improved embodiment, energy is provided with the medial surface that the clamping jaw 221 is in contact with screw
The raised line 224 of frictional force enough between increase clamping jaw 221 and screw, the length direction of the raised line 224 and the length of clamping jaw 221
Direction is identical, and the cross section of the raised line 224 is set to triangle, and the raised line 224 is provided with multiple and along along clamping jaw 221
Side is circlewise distributed, after 221 pinching screw of clamping jaw, is screwed out by rotating screw out of bone, and raised line 224 can increase
Rotating friction force greatly between clamping jaw 221 and screw, further avoids rotating against between clamping jaw 221 and screw, causes
Screw is difficult to screw out out of bone.
As a kind of improved embodiment, outer direct tube section 11 includes the first guide section 111 and the first thread segment
112, the medial surface of the first guide section 111 is the smooth face of cylinder, and the first guide section 111 is located at the thread segment of conical cylinder section 12 and first
Between 112, and the junction of the medial surface of medial surface and the conical cylinder section 12 of the first guide section 111 is provided with rounding, by the
One guide section 111 setting cause the thread segment 112 of conical cylinder section 12 and first have the smooth changeover portion in one end, it is to avoid clamping jaw 221 from
When first thread segment 112 is directly slid onto conical cylinder section 12, the front end of clamping jaw 221 is between the first thread segment 112 and conical cylinder section 12
Junction is blocked, and sets rounding by the medial surface junction of the medial surface in the first guide section 111 and conical cylinder section 12, is entered
One step clamping jaw 221 smoother to be slid onto conical cylinder section 12 from the first guide section 111, it is to avoid in the process card of sliding
Firmly so that claw is difficult to smoothly be slid onto conical cylinder section 12, causes the device to be difficult to pinching screw, is unfavorable for screw out of bone
Take out.
As a kind of improved embodiment, interior direct tube section 21 includes the second guide section 211 and the second thread segment
212, the lateral surface of the second guide section 211 is the smooth face of cylinder, and the second guide section 211 is located at collapsible section 22 and the second screw thread
Between section 212, by setting the second guide section 211 between collapsible section 22 and the second thread segment 212 so that collapsible section 22
It is not directly connected between the second thread segment 212, not only increases the difficulty of processing for taking blind rivet 2, it also avoid the folder of contraction section
When pawl 221 is directly connected with the second thread segment 212, its junction is due to being provided with screw thread, stress concentration so that junction is easy
It is broken, causing the service life of the screw broken nail nail-fetching device reduces.
As a kind of improved embodiment, between the front end of the first guide section 111 and the rear end of the first thread segment 112
Distance be more than the distance between the front end of clamping jaw 221 and the rear end of the second guide section 211, i.e. external screw thread 23 just screwed in internal thread 14 when
Wait, the front end of clamping jaw 221 is connected on the medial surface of the first guide section 111, it is to avoid external screw thread 23 just screwed in internal thread 14 when
Wait, the front end of clamping jaw 221 is connected on the medial surface of conical cylinder section 12, and now conical cylinder section 12 produces component backward to clamping jaw 221, makes
Blind rivet 2 must be taken to be difficult screw-in to take in nail set 1, cause to take blind rivet 2 and take the assembly difficulty between nail set 1 to increase, efficiency of assembling is improved.
As a kind of improved embodiment, take to be provided with two on nail set 1 and be easy to rotate and take the first-hand of nail set 1
Handle 15, first handle 15 includes the connecting pole 152 of first hand 151 and first, one end of the first connecting pole 152 and the first
Hand 151 is detachably connected by screw thread, and the other end is fixedly connected with the outer lateral surface of direct tube section 11, and two first handles 15
Central axis is located along the same line, i.e., two first handles 15 are not only more attractive into being symmetrical arranged, and are easy to medical worker's
Both hands hold first hand 151, after 221 pinching screw of clamping jaw, and medical worker can take nail by the rotation of first handle 15
Set 1 takes out screw out of bone so that medical worker, which can more easily rotate, takes nail set 1, and rotation efficiency is higher, and first
Handle portion 151 be detachably connected with the first connecting pole 152 enable first hand 151 from take nail set 1 on disassemble, subtract
Small storage area, and when to taking nail set 1 to carry out disinfection, first hand 151 can be disassembled, reduce disinfection cost.
As a kind of improved embodiment, take and two are provided with blind rivet 2 are easy to rotate the second-hand for taking blind rivet 2
Handle 24, second handle 24 includes the second connecting pole 242 of hand 241 and second, the one end of the second connecting pole 242 and the second in command
Portion 241 is connected, and the other end is connected with the lateral surface of interior direct tube section 21, and the central axis of two second handles 24 is located at together
On one straight line, i.e., two second handles 24 are not only more attractive into being symmetrical arranged, and are easy to the both hands of medical worker to hold second
Hand 241, medical worker can take blind rivet 2 by the rotation of second handle 24 so that rotation takes the lighter and rotation efficiency of blind rivet 2
Higher, second hand 241 is detachably connected with the second connecting pole 242 enables second hand 241 to be torn open in blind rivet 2 from taking
Unload down, reduce storage area, and when to taking blind rivet 2 to carry out disinfection, second hand 241 can be disassembled, reduction disappears
Malicious cost.
By being symmetrically arranged with two second handles 24 in blind rivet 2 taking so that medical worker can pass through second handle
24 rotation take blind rivet 2 so that rotation take blind rivet 2 more easily and rotation efficiency is higher.
As a kind of improved embodiment, the outer surface of first hand 151 and second hand 241 is all provided with
Male and fomale(M＆F) 153 is set to, rubbing between first hand 151 and second hand 241 of going smoothly is made by the setting of male and fomale(M＆F) 153
Wipe power increase, it is to avoid medical worker is taking nail set 1 by the rotation of first hand 151 and taken by the rotation of second hand 241
During blind rivet 2, skidded between hand and first hand 151 or second hand 241, cause rotation efficiency to reduce.
As a kind of improved embodiment, first handle 15 on the end face of second handle 24 with being provided with cavity
154, reduce the weight of first handle 15 and second handle 24 so that medical worker's energy when rotation takes nail set 1 with taking blind rivet 2
It is enough more laborsaving.
It the above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of screw broken nail nail-fetching device, includes what the bone around screw can be ground along screw length direction
Trepan and can be stretched into along screw length direction in bone taking nail set (1) and can screw in take nail set (1) in take nail
Core (2), it is characterised in that：It is described take blind rivet (2) be plugged in take nail set (1) in and be detachably connected between the two, it is described to take
Nail set (1) includes outer direct tube section (11), conical cylinder section (12) and through outer direct tube section (11) and the spliced eye of conical cylinder section (12)
(13) it is, described to take blind rivet (2) to be plugged in spliced eye (13), big opening end and the outer direct tube section (11) of the conical cylinder section (12)
End face is connected, and the small openend internal diameter of the conical cylinder section (12) is adapted with screw diameter；
It is described take blind rivet (2) include the interior direct tube section (21) that is plugged in outer direct tube section (11) and with interior direct tube section (21)
Connected collapsible section (22) of end face, is provided with internal thread (14) in the spliced eye (13), described take sets in blind rivet (2)
The external screw thread (23) being adapted with internal thread (14) is equipped with, collapsible section (22), which include, can contact in spliced eye (13)
The clamping jaw (221) of wall, the clamping jaw (221) is made up of elastomeric material, and the clamping jaw (221) is provided with multiple and along interior direct tube section
(21) end face is annularly uniformly distributed, and collapsible groove (222) is formed between two clamping jaws (221) of arbitrary neighborhood, described interior
Collapsible section (22) can be acted in the inwall of conical cylinder section (12) during direct tube section (21) rotates in outer direct tube section (11)
Lower contraction internal diameter is until pinching screw.
2. a kind of screw broken nail nail-fetching device according to claim 1, it is characterised in that：The clamping jaw (221) and screw phase
The medial surface of contact is configured to increase and the curved surface (223) of the contact area of screw, and in the length direction of clamping jaw (221)
On cross section on, the outline that the curved surface (223) is constituted is camber line.
3. a kind of screw broken nail nail-fetching device according to claim 1 or 2, it is characterised in that：The clamping jaw (221) and screw
The raised line (224) for the frictional force that can increase clamping jaw (221) between screw, the raised line are provided with the medial surface being in contact
(224) length direction is identical with the length direction of clamping jaw (221), and the cross section of the raised line (224) is set to triangle, institute
Raised line (224) is stated to be provided with multiple and be circlewise distributed along the medial surface of clamping jaw (221).
4. a kind of screw broken nail nail-fetching device according to claim 1, it is characterised in that：The outer direct tube section (11) includes
First guide section (111) and the first thread segment (112), the medial surface of first guide section (111) is the smooth face of cylinder, institute
The first guide section (111) is stated to be located between conical cylinder section (12) and the first thread segment (112), and first guide section (111)
The junction of medial surface and the medial surface of conical cylinder section (12) is provided with rounding.
5. a kind of screw broken nail nail-fetching device according to claim 4, it is characterised in that：The interior direct tube section (21) includes
Second guide section (211) and the second thread segment (212), the lateral surface of second guide section (211) is the smooth face of cylinder, institute
The second guide section (211) is stated to be located between collapsible section (22) and the second thread segment (212).
6. a kind of screw broken nail nail-fetching device according to claim 5, it is characterised in that：Before first guide section (111)
The distance between end and the first thread segment (112) rear end are more than the clamping jaw (221) front end and second guide section
(211) the distance between rear end, at the beginning of the external screw thread (23) screws in the internal thread (14), clamping jaw (221) front end is supported
On the medial surface for being connected to the first guide section (111).
7. a kind of screw broken nail nail-fetching device according to claim 1, it is characterised in that：Described take is provided with nail set (1)
Two are easy to the first handle (15) that rotation takes nail set (1), and the first handle (15) includes first hand (151) and the
One connecting pole (152), one end and the first hand (151) of first connecting pole (152) are detachably connected by screw thread, separately
One end is fixedly connected with outer direct tube section (11) lateral surface, and the central axis of two first handles (15) is located along the same line.
8. a kind of screw broken nail nail-fetching device according to claim 7, it is characterised in that：Described take is provided with blind rivet (2)
Two are easy to the second handle (24) that rotation takes blind rivet (2), and the second handle (24) includes second hand (241) and
Two connecting poles (242), one end and the second hand (241) of second connecting pole (242) are detachably connected by screw thread, separately
One end is connected with the lateral surface of interior direct tube section (21), and the central axis of two second handles (24) is located along the same line.
9. a kind of screw broken nail nail-fetching device according to claim 8, it is characterised in that：The first hand (151) with
The outer surface of the second hand (241) is disposed as increasing the male and fomale(M＆F) (153) of frictional force.
10. a kind of screw broken nail nail-fetching device according to claim 8 or claim 9, it is characterised in that：The first handle (15) with
The cavity (154) of handle weight can be reduced by being provided with the end face of the second handle (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707006.6A CN107307900B (en) | 2017-08-17 | 2017-08-17 | A kind of screw broken nail nail-fetching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707006.6A CN107307900B (en) | 2017-08-17 | 2017-08-17 | A kind of screw broken nail nail-fetching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107307900A true CN107307900A (en) | 2017-11-03 |
| CN107307900B CN107307900B (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710707006.6A Active CN107307900B (en) | 2017-08-17 | 2017-08-17 | A kind of screw broken nail nail-fetching device |
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| CN (1) | CN107307900B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109157279A (en) * | 2018-10-23 | 2019-01-08 | 朱先任 | A kind of orthopaedics guide pin extractor |
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| Publication number | Publication date |
|---|---|
| CN107307900B (en) | 2019-04-26 |
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