CN111633573A - Sand blasting protection tool for metal implant - Google Patents
Sand blasting protection tool for metal implant Download PDFInfo
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- CN111633573A CN111633573A CN202010424597.8A CN202010424597A CN111633573A CN 111633573 A CN111633573 A CN 111633573A CN 202010424597 A CN202010424597 A CN 202010424597A CN 111633573 A CN111633573 A CN 111633573A
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- groove
- elastic
- clamping
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- 239000007943 implant Substances 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title claims abstract description 44
- 238000005488 sandblasting Methods 0.000 title claims abstract description 40
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 6
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 3
- 238000004881 precipitation hardening Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 7
- 210000000988 bone and bone Anatomy 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000399 orthopedic effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000012149 noodles Nutrition 0.000 description 2
- 238000010883 osseointegration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000012773 waffles Nutrition 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000629 knee joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4644—Preparation of bone graft, bone plugs or bone dowels, e.g. grinding or milling bone material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Mechanical Engineering (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a sand blasting protection tool for a metal implant, which comprises an elastic protection sleeve, a protective sleeve and a protective cover, wherein the elastic protection sleeve is used for coating the non-sand blasting surface of the metal implant; the rigid protection clamp is provided with an imitated groove matched with the elastic protection sleeve so as to clamp the metal implant positioned in the elastic protection sleeve; clamping means for securing said metal implant in said contoured groove. The sand blasting protection tool provided by the invention has the advantages of wear resistance, long service life, high clamping efficiency, good protection effect and high yield of sand blasting products.
Description
Technical Field
The invention relates to the technical field of protective devices, in particular to a sand blasting protective tool for a metal implant.
Background
At present, the prosthesis implant made of metal materials is widely applied to orthopedics clinic, however, as the metal materials are materials close to biological inertia, the surface of the metal materials is difficult to be tightly attached to new bone tissues, and the internal fixation failure of the implant can occur, thereby causing the failure of the operation. Therefore, in order to improve the success rate of the metal implant, make the implant effectively fit with the human new bone tissue and promote the growth of new bone tissue cells, thereby achieving the purpose of rigid osseointegration, researchers often perform certain modification treatment on the surface of the implant in advance.
The sand blasting is one of the common modes of orthopedic implant surface modification treatment, compressed air is used as power, the gravel is sprayed to the surface of a workpiece to be treated through high-speed air flow, and the surface of the workpiece can form a concave-convex surface structure due to the impact and collision effect of the gravel on the surface of the workpiece, so that a certain range of roughness is obtained. When the implant is introduced into the body, bone tissue can be easily adhered to the rough surface of the implant to form osseointegration, thereby achieving effective internal fixation.
With the wide application of sand blasting, sand blasting protection also becomes a great factor influencing the development of orthopedic implants, particularly tibial platform plates which are implants directly contacted with bone tissues, and the quality of the sand blasting protection effect directly influences the quality of the orthopedic implants. In the existing sandblasting protection technology, a metal implant such as a tibial plateau plate is generally placed in a protection base made of a flexible material, for example, the whole protection base is made of UHMWPE (ultra-high molecular weight polyethylene) or whole medical silica gel, and the protection base can be seriously worn after sandblasting for many times or overspray a non-sandblasted surface, so that the protection function cannot be effectively achieved. In addition, the whole material is the protection base of metal, although this kind of protection base can avoid the problem of protection base wearing and tearing, nevertheless because the metal part shrinkage factor itself is less than the working of plastics, consequently, it can't wrap up on the non-sandblast surface of shin bone platform dish closely, even when taking out the part after the sandblast is ended, remaining grit landing can cause the fish tail to non-sandblast face to influence the quality of product. In addition, the existing protection tool is often clamped in a bolt connection mode, and the clamping and fixing mode is inconvenient to operate, time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the sand blasting protection tool for the metal implant, which has the advantages of wear resistance, long service life, high clamping efficiency, good protection effect and high yield of sand blasting products.
In order to achieve the above purpose, the invention provides the following technical scheme:
a sandblast protection tool for metal implants, comprising:
the elastic protection sleeve is used for coating the non-sandblasting surface of the metal implant;
the rigid protection clamp is provided with an imitated groove matched with the elastic protection sleeve so as to clamp the metal implant positioned in the elastic protection sleeve;
clamping means for securing said metal implant in said contoured groove.
As an optional embodiment, the metal implant is a tibial platform plate, the non-sandblasted surface of the tibial platform plate includes an outer contour surface and a bottom surface, and the elastic protection sleeve is made of medical silica gel or ultra-high molecular weight polyethylene.
As an optional implementation manner, the rigid protection clamp includes a first base and a second base that can be fastened, a first profiling half-groove is opened on the first base, a second profiling half-groove is opened on the second base, and when the first base and the second base are fastened, the first profiling half-groove and the second profiling half-groove form the profiling groove.
As an alternative embodiment, the clamping device comprises a locking part, which is mainly composed of a lock hole and a cam handle matched with the lock hole, wherein,
the locking hole penetrates through the first base and the second base and is arranged on the rigid protection clamp, the locking hole comprises a threaded hole section, a clamping groove section and a pin hole section which are sequentially arranged, the threaded hole section is positioned in the first base, the diameter of the clamping groove section is larger than that of the threaded hole and the pin hole section, an elastic piece is arranged in the clamping groove section, and the length of the elastic piece is larger than that of the clamping groove section;
the cam handle comprises a connecting shaft and a mandrel vertically arranged at the end part of the connecting shaft, a movable stop block is arranged on the connecting shaft in a penetrating way, an external thread is arranged at the free end of the connecting shaft, and the connecting shaft is fixedly connected with the threaded hole section through the external thread after sequentially penetrating through the pin hole section and the elastic piece; the mandrel is provided with a rotatable handle, the stop block performs feed motion along the connecting shaft along with the rotation of the handle, and the second base is pushed to move towards the first base to finish clamping; or the elastic piece moves away from the first base along with the second base.
As an optional implementation manner, the rigid protection clamp is further provided with a threaded hole communicated with the lock hole, and a fastening screw used for limiting the connecting shaft is arranged in the threaded hole.
As an optional implementation manner, the clamping device further includes a guide portion, the guide portion mainly includes a guide hole and a guide shaft, the guide hole penetrates through the first base and the second base and is opened on the rigid protection fixture, and the guide shaft is inserted into the guide hole.
As an optional implementation manner, the guide hole is parallel to the clamping direction of the first base and the second base, the guide hole is a third-level step hole, and is sequentially a first-level threaded hole, a second-level pin hole and a third-level counter bore, the first-level threaded hole is arranged in the first base, and the second-level pin holes are respectively distributed in the first base and the second base.
As an optional implementation manner, the rigid protection clamp is made of precipitation hardening stainless steel, two profile grooves are formed in the rigid protection clamp in parallel, one clamping portion is arranged between the two profile grooves, and one guide portion is arranged on the outer side of each profile groove.
As an optional implementation manner, a lock hole is further formed at the side of each guide portion, and one elastic body is arranged in each lock hole.
As an alternative embodiment, a cam handle is provided in each of the locking holes.
As an alternative embodiment, the elastic body is a spring or a rubber cylinder.
As an optional implementation manner, the rigid protection clamp is provided with one contour groove, one side of the contour groove is provided with the clamping portion, and the other side of the contour groove is provided with the guiding portion.
As an optional embodiment, the inner bottom wall of the elastic protection sleeve is further provided with a reinforcing rib. Preferably, the end of the reinforcing bar is cruciform.
As an optional implementation manner, a handle is further disposed on the first base. Preferably, the handle is disposed corresponding to the cam handle.
As an optional implementation manner, a weight-reducing groove is further formed on the bottom surface of the rigid protection clamp. Preferably, the lightening grooves are opened corresponding to the contour grooves.
Compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, firstly, the elastic protection sleeve is coated on the non-sandblasting surface of the metal implant, and based on the advantages of the material of the elastic protection sleeve, the elastic protection sleeve can be tightly attached to the non-sandblasting surface, so that the sand blasting protection tool has a good protection effect on the non-sandblasting surface of the metal implant; secondly, the metal implant coated with the elastic protective sleeve can be further protected by being placed in a rigid protective fixture, the rigid protective fixture has good abrasion resistance and long service cycle compared with a protective base which is wholly made of flexible materials in the prior art, the elastic protective sleeve has good fitting performance and high shrinkage rate compared with the protective base which is wholly made of metal, when sand blasting is finished and taken out, the sand cannot slide to scratch a non-sand blasting surface, even if the elastic protective sleeve is worn after being used for multiple times, the elastic protective sleeve can be directly replaced, and the cost is lower compared with a method for integrally replacing the protective base;
in addition, the protective base is a clamp provided with a clamping device, a clamping part of the clamping device is a cam handle, a spring is further arranged in a lock hole, when the clamping is needed, the handle is rotated along a mandrel, the handle pushes a stop block, the stop block moves forwards along a connecting shaft and applies thrust to a second base, so that the second base is pushed to move towards a first base, the cam handle is in threaded connection with a threaded section in a locking hole through external threads of the connecting shaft before the clamping is achieved, a clamping gap between the first base and the second base is located in an adjusting amount range of the cam handle through adjusting the connection depth of the threads, and the position of the connecting shaft can be limited through a fastening screw after the clamping gap is determined; when metal implant is required to be taken out, the handle is rotated along the mandrel in the opposite direction, the elastic piece applies elastic force to the connecting wall between the clamping groove section and the pin hole section, so that the second base is pushed to move in the direction far away from the first base, and the mode is high in clamping efficiency, convenient to operate, time-saving and labor-saving relative to the existing bolt-connected protection base.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a protection base according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of a metal implant according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the construction of the elastic shield of one embodiment of the present invention;
FIG. 5 is a top view of a first base in an embodiment of the invention;
FIG. 6 is a side view of FIG. 5;
FIG. 7 is a top view of a second base in an embodiment of the invention;
FIG. 8 is a side view of FIG. 7;
FIG. 9 is a schematic view of the structure of a cam handle in one embodiment of the invention.
Description of reference numerals:
1. an elastic protective sleeve; 11. reinforcing ribs; 2. a rigid protective fixture; 21. profiling grooves; 211. a first profile half-groove; 212. a second profile half-groove; 22. a first base; 23. a second base; 24. a threaded hole; 25. fastening screws; 26. a weight reduction groove; 27. a handle; 3. a clamping device; 31. a locking portion; 311. a lock hole; 3111. a threaded bore section; 3112. a slot clamping section; 3113. a pin hole segment; 3114. an elastic member; 312. a cam handle; 3121. a connecting shaft; 3122. a mandrel; 3123. a stopper; 3124. a handle; 3125. a cam bump; 32. a guide portion; 321. a guide hole; 3211. a first-level threaded hole; 3212. a secondary pin hole; 3213. a third-stage counter bore; 322. a guide shaft; 4. a metal implant; 41. a bottom surface; 42. an outer contoured surface; 43. waffle noodles; 44. dragon bone noodles.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1-2, the invention provides a sand blasting protection tool for a metal implant, which comprises an elastic protection sleeve 1, a rigid protection clamp 2 and a clamping device 3, wherein the elastic protection sleeve 1 is used for covering a non-sand blasting surface of the metal implant 4; the rigid protection clamp 2 is provided with a contour groove 21 matched with the elastic protection sleeve 1, the contour groove 21 is slightly larger than the outer edge of the elastic protection sleeve 1 in size, and the deviation is about 0.1-0.4mm so as to clamp the metal implant 4 in the elastic protection sleeve 1; the clamping device 3 is used to fasten the metal implant 4 in the contour groove 21.
The sand blasting protection tool provided by the invention mainly comprises a rigid protection clamp 2, an elastic protection sleeve 1 and a clamping device 3, wherein the elastic protection sleeve 1 is positioned in an imitated groove 21 of the rigid protection clamp 2, and compared with the prior art, the elastic protection sleeve 1 is firstly coated on the non-sand blasting surface of a metal implant 4, and the elastic protection sleeve can be tightly attached to the non-sand blasting surface based on the advantages of the material of the elastic protection sleeve 1 and can play a good protection role on the non-sand blasting surface of the metal implant 4; secondly, the metal implant 4 coated with the elastic protection sleeve 1 is placed into the rigid protection clamp 2 for further protection, and compared with the protection base which is wholly made of flexible materials in the prior art, the rigid protection clamp 2 is good in abrasion resistance and long in service cycle, the elastic protection sleeve 1 is good in fitting performance and high in shrinkage rate compared with the protection base which is wholly made of metal, and when sand blasting is finished and taken out, the sand blasting surface can not be scratched by gravel sliding, even if the elastic protection sleeve 1 is worn after being used for multiple times, the elastic protection sleeve can be directly replaced, and the cost is lower compared with a method for integrally replacing the protection base.
In the present embodiment, the tibial plateau is taken as an example of the metal implant 4 for description, but it is understood that the metal implant 4 may be of other types, but preferably, the non-sand-blasting surface is located on the bottom wall and the side wall, so as to facilitate fixation and to facilitate forming of the contour groove 21, the elastic protection sleeve 1 is provided, and the sand-blasting effect of the regular shape is also better, for example, the tibial plateau belongs to a component of a knee joint prosthesis, and the specific structure is shown in fig. 3, which mainly includes a bottom surface 41, an outer contour surface 42, a waffle surface 43 and a keel surface 44, wherein the non-sand-blasting surface includes the outer contour surface 42 and the bottom surface 41. Referring to fig. 4, when the elastic protection sleeve 1 is disposed, it is only necessary to set the elastic protection sleeve as a groove adapted to the tibial platform plate, and in this embodiment, the elastic protection sleeve 1 is made of medical silica gel or ultra-high molecular weight polyethylene. Considering the problems that the elastic protection sleeve 1 made of medical silica gel or ultra-high molecular weight polyethylene has better ductility and is not easy to form during production, therefore, the reinforcing ribs 11 can be additionally arranged on the inner bottom wall of the elastic protection sleeve 1, the shape of the reinforcing ribs 11 is not limited, but is preferably provided at least in the vicinity of the axis of the elastic protection sheath 1, as for example an elastic protection sheath 1 adapted to a tibial platform tray, which overall has an oval shape, and the difference between the long axis and the short axis is not large, so the reinforcing ribs 11 can be arranged along the long axis, and the two ends of the long axis are arranged into a cross shape, therefore, the good reinforcing effect is realized, the height of the reinforcing rib is not suitable to be too high, preferably 4mm, the existence of the reinforcing rib 11 can ensure that the elastic protection sleeve 1 is easy to form during production, but also plays a reinforcing role to increase the conformability of the elastic protection sheath 1 to the metal implant 4.
Referring to fig. 5-8, in the embodiment, the rigid protection fixture 2 is made of precipitation hardening stainless steel, the rigid protection fixture 2 is composed of two parts, namely a first base 22 and a second base 23, which can be fastened together to form a whole, in the actual production process, the rigid protection fixture 2 is firstly integrally formed, that is, the contour groove 21 is a whole, in order to cut the contour groove 21 into two parts which are easy to take and place the metal implant 4, the integrally formed rigid protection fixture 2 is cut by a wire cutting machine, so as to form the first base 22 and the second base 23. Wherein, when the first base 22 and the second base 23 are buckled, the first profiling half-groove 211 on the first base 22 and the second profiling half-groove 212 on the second base 23 form a profiling groove 21 for accommodating the metal implant.
Generally, one curved groove 21 is formed in one rigid protection jig 2, but in order to improve the blasting efficiency, a plurality of curved grooves 21 are formed, and in view of that each patient needs to perform two tibial surgeries at the same time at most, two curved grooves 21 are formed in one rigid protection jig 2 at the same time, but the number of the curved grooves 21 is not limited to one to two, and in order to achieve mass production, more than two curved grooves 21 may be formed at the same time, and in the present application, the clamping device 3 will be described by taking only one curved groove 21 and two curved grooves 21 as an example.
Referring to fig. 6 and 8, the clamping device 3 in the present embodiment includes a locking portion 31, the locking portion 31 mainly includes a locking hole 311 and a cam handle 312 adapted to the locking hole 311, wherein the locking hole 311 penetrates through the first base 22 and the second base 23 and is disposed on the rigid protection clamp 2, referring to fig. 5 and 7, the locking hole 311 includes a threaded hole section 3111, a slot section 3112 and a pin hole section 3113 sequentially disposed, the threaded hole section 3111 is disposed in the first base 22, a diameter of the slot section 3112 is greater than the threaded hole section 3111 and the pin hole section 3113, an elastic member 3114 is disposed in the slot section 3112, and a length of the elastic member 3114 is greater than a length of the slot section 3112.
Referring to fig. 9, the cam handle 312 includes a connecting shaft 3121 and a spindle 3122 vertically disposed at an end of the connecting shaft 3121, a movable stopper 3123 is disposed on the connecting shaft 3121, an external thread is disposed at a free end of the connecting shaft 3121, and the connecting shaft 3121 sequentially passes through the pin hole section 3113 and the elastic member 3114 and then is fixedly connected to the pin hole section 3111 through the external thread; the mandrel 3122 is provided with a handle 3124 which can rotate around the mandrel 3122, the connection position of the handle 3124 and the mandrel 3122 is in a cam shape, one end of the cam-shaped connection position is extended to form a handle portion which can be held, when the metal implant 4 is required to be clamped, firstly, the connecting shaft 3121 is rotated to make the external thread of the connecting shaft 3121 and the threaded hole section 3111 in the lock hole 311 implement threaded connection, according to the regulating quantity of the cam handle, the clamping gap between the first base 22 and the second base 23 is determined, and further, the depth of the threaded connection between the first base 22 and the second base is determined, so as to implement the pre-connection of the first base 22 and the second base 23, considering that the problem of thread abrasion may exist in the long-term use only by the pre-connection of the thread, therefore, referring to fig. 1, in order to further improve the stability of the clamping, the threaded hole 24 which is communicated with the lock hole 311 can be opened on the rigid protection clamp, and screwing the fastening screw 25 into the threaded hole 24 until the fastening screw 25 is tightly contacted with the connecting shaft 3121, so as to limit the position of the connecting shaft 3121, and facilitate accurate limit of the subsequent cam handle 312. The fastening screw 25 is a conical body, and the conical head of the fastening screw can be just clamped with the external thread of the connecting shaft 3121, so that the external thread of the connecting shaft 3121 cannot be abraded.
After the pre-connection is completed, the handle 3124 is rotated around the spindle 3122, at this time, the cam bump 3125 at the cam-shaped connection part can push the stop 3123 to make a feed movement, the stop 3123 can be moved forward along the connection shaft 3121 and can apply a thrust force to the second base 23, so that the second base 23 can be pushed to move toward the first base 22; when the metal implant 4 needs to be taken out, the handle 3124 is rotated around the spindle 3122 in the opposite direction to that in the locking process, the elastic member 3114 applies an opposite elastic force to the connecting wall between the notch section 3112 and the pin hole section 3113, so as to push the second base 23 to move away from the first base 22, thereby completing the releasing action. The mode is relatively with current bolted connection's protection base clamping efficient, convenient operation, labour saving and time saving. The elastic member 3114 in this application may be a spring, and may also be a rubber tube with a through hole, and those skilled in the art will readily understand that the inner diameter of the through hole is not smaller than the outer diameter of the connecting shaft 3121, so as to facilitate the penetration of the connecting shaft 3121.
Referring to fig. 5 to 8, in order to improve the clamping accuracy of the present application, the clamping device 3 may further include a guide portion 32, the guide portion 32 mainly includes a guide hole 321 and a guide shaft 322, the guide hole 321 is opened on the rigid protection jig 2 through the first base 22 and the second base 23, and the guide shaft 322 is inserted into the guide hole 321. The guiding hole 321 is preferably arranged in parallel to the clamping direction of the first base 22 and the second base 23, the locking hole 311 is arranged in parallel to the guiding hole 321, in this embodiment, the guiding hole 321 is a third-level step hole, the third-level step hole includes a first-level threaded hole 3211, a second-level threaded hole 3212 and a third-level counter bore 3213, which are sequentially arranged, wherein the first-level threaded hole 3211 is arranged in the first base 22, and the second-level threaded holes 3212 are respectively distributed in the first base 22 and the second base 23. The primary threaded holes 3211 in this embodiment are used for fixing and limiting the guide shaft 322, the secondary threaded holes 3212 are distributed in a manner of preventing assembly dislocation during clamping, or better guiding, and the tertiary counter bores 3213 serve to accommodate the head of the guide shaft, so that the aesthetic degree of the rigid protection clamp 2 can be improved.
When only one contour groove 21 is formed in the rigid protection clamp 2, two lock holes 311 may be formed on both sides of the contour groove 21, an elastic member 3114 is disposed in each lock hole 311, a cam handle 312 may be disposed in only one lock hole 311, and in order to obtain a better locking effect, the cam handles 312 may be disposed in both the lock holes 311; besides, a locking part 31 can be arranged on one side of the contour groove 21, a guide part 32 can be arranged on the other side of the contour groove, when the cam lock is used, the guide shaft 322 is firstly installed to play a role of pre-connection, and then the cam handle 312 is rotated to lock.
Referring to fig. 1-2, when two contour grooves 21 are formed in the rigid protective fixture 2, the two contour grooves 21 are arranged side by side, a locking portion 31 is disposed between the two contour grooves 21, and a guiding portion 32 is disposed outside each of the two contour grooves 21. The outer side referred to herein is the opposite side of each contour groove 21 relative to the middle, that is, the middle position of two contour grooves 21, so that the stress during locking can be balanced, and only one cam handle 312 needs to be provided, the operation is relatively convenient, of course, in order to further improve the locking degree, a lock hole 311 can be provided at the side of each guide portion 32, and an elastic body 3114 is provided in each lock hole 311. At this time, the two locking holes 311 located beside the guiding portion 32 do not need to be provided with the cam handles 312, and only the springs in the two locking holes 311 need to provide larger elastic force when being loosened. Of course, if a greater and more stable locking force is required, a cam handle 312 may be provided in each locking hole 311.
Referring to fig. 5-8, considering that the rigid protection clamp 2 is heavy and inconvenient to move, the rigid protection clamp 2 may be provided with a plurality of weight-reducing grooves 26, in order to improve the aesthetic property, the weight-reducing grooves 26 may be provided corresponding to each of the contour grooves 21, and the first base 22 may be further provided with a handle 27, referring to fig. 1-2, so as to facilitate the fixing of the first base 22 when the cam handle 312 is rotated, thereby facilitating the completion of the clamping process.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a sandblast protection frock for metal implant which characterized in that includes:
the elastic protection sleeve is used for coating the non-sandblasting surface of the metal implant;
the rigid protection clamp is provided with an imitated groove matched with the elastic protection sleeve so as to clamp the metal implant positioned in the elastic protection sleeve;
clamping means for securing said metal implant in said contoured groove.
2. The sandblasting protection tool of claim 1, wherein the metal implant is a tibial platform plate, the non-sandblasted surface of the tibial platform plate comprises an outer contoured surface and a bottom surface, and the elastic protective sheath is made of medical silica gel or ultra-high molecular weight polyethylene.
3. The sandblast protection tool as claimed in claim 1 or 2, wherein the rigid protection clamp includes a first base and a second base that can be fastened, the first base is provided with a first profiling half-groove, the second base is provided with a second profiling half-groove, and when the first base and the second base are fastened, the first profiling half-groove and the second profiling half-groove form the profiling groove.
4. The sand blasting protection tool as claimed in claim 3, wherein the clamping device comprises a locking part, the locking part mainly comprises a lock hole and a cam handle matched with the lock hole, wherein,
the locking hole penetrates through the first base and the second base and is arranged on the rigid protection clamp, the locking hole comprises a threaded hole section, a clamping groove section and a pin hole section which are sequentially arranged, the threaded hole section is positioned in the first base, the diameter of the clamping groove section is larger than that of the threaded hole and the pin hole section, an elastic piece is arranged in the clamping groove section, and the length of the elastic piece is larger than that of the clamping groove section;
the cam handle comprises a connecting shaft and a mandrel vertically arranged at the end part of the connecting shaft, a movable stop block is arranged on the connecting shaft in a penetrating way, an external thread is arranged at the free end of the connecting shaft, and the connecting shaft is fixedly connected with the threaded hole section through the external thread after sequentially penetrating through the pin hole section and the elastic piece; the mandrel is provided with a rotatable handle, the stop block performs feed motion along the connecting shaft along with the rotation of the handle, and the second base is pushed to move towards the first base to finish clamping; or the elastic piece moves away from the first base along with the second base.
5. The sandblast protection tool of claim 4, wherein the clamping device further comprises a guide portion, the guide portion mainly comprises a guide hole and a guide shaft, the guide hole penetrates through the first base and the second base and is arranged on the rigid protection clamp, and the guide shaft is inserted into the guide hole.
6. The sand blasting protection tool according to claim 5, wherein the guide holes are arranged in parallel to the clamping direction of the first base and the second base, the guide holes are three-level step holes and sequentially comprise first-level threaded holes, second-level pin holes and third-level counter bores, the first-level threaded holes are formed in the first base, and the second-level pin holes are respectively distributed in the first base and the second base.
7. The sand blasting protection tool according to claim 6, wherein the rigid protection clamp is made of precipitation hardening stainless steel, two profiling grooves are formed in the rigid protection clamp in parallel, one clamping portion is arranged between the two profiling grooves, and one guide portion is arranged on the outer side of each profiling groove.
8. The sandblasting protection tool as claimed in claim 7, wherein a lock hole is further formed at a side of each guide portion, and one elastic body is arranged in each lock hole.
9. The sandblast protection tool as claimed in claim 6, wherein the rigid protection clamp is provided with a contour groove, one side of the contour groove is provided with the clamping portion, and the other side of the contour groove is provided with the guide portion.
10. The sandblasting protection tool of claim 1, wherein a reinforcing rib is further disposed on the inner bottom wall of the elastic protection sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424597.8A CN111633573A (en) | 2020-05-19 | 2020-05-19 | Sand blasting protection tool for metal implant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424597.8A CN111633573A (en) | 2020-05-19 | 2020-05-19 | Sand blasting protection tool for metal implant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111633573A true CN111633573A (en) | 2020-09-08 |
Family
ID=72324712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010424597.8A Pending CN111633573A (en) | 2020-05-19 | 2020-05-19 | Sand blasting protection tool for metal implant |
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| Country | Link |
|---|---|
| CN (1) | CN111633573A (en) |
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| CN113829243A (en) * | 2021-10-26 | 2021-12-24 | 杭州星辰三比齿科器材有限公司 | Sand blasting tool for improving sand blasting efficiency of dental orthodontic bracket and using method |
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