CN202892065U - Inflating locking screw system - Google Patents
Inflating locking screw system Download PDFInfo
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- CN202892065U CN202892065U CN 201220526941 CN201220526941U CN202892065U CN 202892065 U CN202892065 U CN 202892065U CN 201220526941 CN201220526941 CN 201220526941 CN 201220526941 U CN201220526941 U CN 201220526941U CN 202892065 U CN202892065 U CN 202892065U
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Abstract
The utility model discloses an inflating locking screw system. The inflating locking screw system comprises an inflating locking screw and a bone fixation plate. The inflating locking screw comprises a tip part, a screw thread part and a tail part. The screw thread part is provided with a first screw thread. The tail part is of a taper structure. The end of the screw thread part deviating from the tip part has a larger diameter. A second screw thread is arranged on the surface of the screw thread part. A mounting mechanism is arranged in the tail part. The screw pitch of the first screw thread is larger than the screw pitch of the second screw thread. A through hole is formed in the bone fixation plate. An inner screw thread matched with the second screw thread is arranged in the through hole, and the inflating locking screw is enabled to connect with the inner screw thread in a press-fit mode through the second screw thread. The inflating locking screw system further improves mechanical stability of the whole device, and effectively reduces soft tissue complication caused by bad attaching of the bone fixation plate.
Description
Technical field
This utility model relates to the fracture internal fixation system, relates in particular to the internal fixation system that is applied to articular fracture and fracture around joint.
Background technology
At present the Therapeutic Principle of articular fracture is as follows: blade plate supported to rebuild metaphysis, postoperative early functional exercise after intra-articular fracture needed the pressurization of noinvasive anatomical reduction, intra-articular fracture piece of articular surface and strong fixing, bone grafting and bone grafting; Under this Therapeutic Principle, the mode of healing of intra-articular fracture is direct knitting; Directly the biological property of knitting is: under absolute stable condition, realize union of fracture by the direct area of new bone of the open havers' system of fracture site, do not have callus formation.
What the direct knitting of intra-articular fracture required is absolute stability, the absolute stable technology that realizes at present the intra-articular fracture piece is the lag screw technology, the principle of this technology is as follows: lag screw relies on blade plate or cortical bone is applied enough large preload with pad so that intra-articular fracture piece move toward one another, eliminate the slit between the intra-articular fracture piece, the interior sclerite of subjoint resets and the intra-articular fracture piece is formed pressurization and fixed effect; Relying on blade plate or pad that cortical bone is applied enough large preload by lag screw makes skeleton and inside-fixture produce firm set, avoid the movement between any fracture fragments, under the effect of the various deformation forces that muscle contraction, physiotherapy or part or all of heavy burden produce, keep simultaneously the close contact between fracture fragments.
Blade plate supports to rebuild metaphysis and can prevent articular step-off behind bone grafting and the bone grafting, what present clinical main flow was used is the inner fixed support technology, the principle of this technology is as follows: the angulation stability under articular surface by lock screw and locking bone fracture plate, support metaphysis, the prevention articular step-off, wherein the inner screwed screw of locking bone fracture plate is combined with the screw afterbody, and the screw afterbody has screw thread.
If when having setting board of skeleton end fracture; rebuild joint metaphysis the need protection vigor of soft tissue and the integrity of peplos; the setting board of skeleton end fracture piece does not need anatomical reduction; as long as keep the axis of limbs; by the integrally-built relatively stable early functional exercise that allows control; present clinical main flow adopts locking inner fixed support technology to realize above-mentioned treatment requirement, and the mechanics principle of this technology is as follows: locking bone fracture plate by with the locking of lock screw; the stability of the locking of lock screw multi-angle and lock screw screw thread-bone interface realizes the angle axial stability of whole internal fixation system.
Main flow is used according to mentioned above principle design and in the clinical treatment articular fracture is locked pressurized bone plate and the use that mixes of many pieces of lag screws, perhaps the use that mixes of locking bone fracture plate and many pieces of lag screws; This is the bone plate system of two kinds of different mechanisms to be mixed use, Stephan M professor Perren points out that lock screw and lag screw are inconsistent, lag screw is pressed to surface of bone with blade plate and lock screw makes blade plate be lifted away from surface of bone, only have correct using skill just can address this problem, this is one of difficult point of this technology of training; This means at prior art lower pulling force screw and can only realize pressurization between the sclerite, lock screw can only realize the angle axial stability of internal fixation system, for same piece of screw, no matter be lag screw or lock screw, the two cannot be realized simultaneously.
There is following shortcoming in the related medical apparatus of present clinical articular fracture main flow Therapeutic Method and use:
1, be used in the subjoint sclerite reset, realize the pressurization of intra-articular fracture piece also strong fixing lag screw belong to the standard bone plate technology, lag screw relies on blade plate or pad that cortical bone is applied enough large preload and makes skeleton and the firm set of inside-fixture generation, avoid the movement between any fracture fragments, under the effect of various deformation forces, keep the close contact between fracture fragments simultaneously; Lag screw is applied enough large preload depend on patient's experience and the mechanical property of this zone skeleton, the different individual and different anatomical positions of same individuality, the bone amount is all different, the mechanical property of skeleton is different, have following three possibilities so the experience of depending on is tightened lag screw: one, overtorquing causes the interface cut damage between screw plastic deformation, fracture or spongy bone and the screw thread, so that interior solid failure; Two, the bone mechanical properties of lag screw operating area is too poor, can't apply enough large preload to lag screw, can't realize intra-articular fracture piece pressurization and strong fixing, so that interior solid failure; Three, stubborn too loose, do not reach enough large axial pre-load, can't realize intra-articular fracture piece pressurization and strong fixing.
2, be used in the subjoint sclerite reset, realize the pressurization of intra-articular fracture piece also strong fixing lag screw belong to the standard bone plate technology, the lag screw afterbody can not form with blade plate the integral body of a locking, do not have the angle axial stability, it is loosening to occur the screw sequential behind the certain hour under stress, so that interior solid failure.
Although 3, lock screw can lock with locking bone fracture plate, can not subjoint in sclerite reset and pressurization be provided.
4, treatment is during articular fracture, is used in the subjoint sclerite to reset, realizes the pressurization of intra-articular fracture piece also strong fixing cancellous bone screw and support and rebuild metaphyseal lock screw system and can not form an integral body; Therefore often need lag screw to use with locking bone fracture plate or locked pressurized bone plate, have following shortcoming: (1) can't avoid lag screw and the intrinsic shortcoming of locking bone fracture plate system, and the screw number that implants increases greatly, but implanting more inside-fixture will cause larger operation wound, higher medical expense; (2) metaphysis of adjacent joints face is because anatomy relationship, surface of bone area that can pedicle screw is less, sometimes have to clinically implant lag screw being close under the articular surface, and Manely professor and professor Schatzker point out: screw is too pressed close to articular surface can make subchondral bone too stiff, thereby causes its surperficial articular cartilage to be dissolved; They recommend screw apart from subchondral bone 5mm at least; (3) soft tissue at the more key position of periarticular soft tissue is thin, and it is bad at the more screw of metaphysis implantation blade plate and skeleton to be attached, and causes the soft tissue related complication.The performance when treatment part articular fracture of these shortcomings is particularly outstanding, the locking bone fracture plate of the at present clinical main flow use for the treatment of part articular fracture is longer with respect to the length of fractured area, blade plate extends to key section, backbone section not fracture need to be screwed into screw equally, cause larger operation wound, long blade plate and skeleton attach the bad decline of internal fixation system mechanics effect and the soft tissue complication of also may causing simultaneously.
5, the required torsion of cancellous bone screw that is screwed into the intra-articular fracture piece depends on the operator experience, so there is the gradient of a learning curve, is unfavorable for the formation of the quantitative criteria of this technology, and the accumulation of experience depends on the experience of failure; The use that mixes of locked pressurized bone plate and many pieces of lag screws, the perhaps use that mixes of locking bone fracture plate and many pieces of lag screws; This is the bone plate system of two kinds of different mechanisms to be mixed use, and only has correct using skill just can address this problem, and this needs training, and is one of difficult point of training.
The utility model content
Problem in view of above-mentioned prior art exists has proposed this utility model.
Therefore, the technical problems to be solved in the utility model is that a kind of locking and pressurizing screw system is provided: one, can realize the pressurization of intra-articular fracture piece; Its two, can lock between screw and the blade plate, have good angle axial stability; Its three, improve the stability between internal fixation system and the bone interface, the probability of solid failure in reducing; Its four, improve the security reliability of intra-articular fracture block reset, pressurization, in the process that realizes the pressurization of intra-articular fracture piece, the effective interface between protector and the spongy bone; Its five, realize the quantification of articular surface fracture piece pressure process; Its six, realize the quantification of locking process between screw and the blade plate.
For solving the problems of the technologies described above, this utility model provides following technical scheme: for solving the problems of the technologies described above, this utility model provides following technical scheme: a kind of locking and pressurizing screw system, comprise locking and pressurizing screw and blade plate, described locking and pressurizing screw comprises tip, threaded portion and afterbody, and described threaded portion is provided with the first screw thread, described afterbody is taper, it is larger to deviate from tip one end diameter, and the surface is provided with the second screw thread, is provided with installing mechanism in the afterbody; The pitch of described the first screw thread is greater than the pitch of the second screw thread; Form through hole on the described blade plate, be provided with the female thread that matches with the second screw thread in the described through hole, so that the locking and pressurizing screw is connected with the female thread press-fit by the second screw thread with blade plate.
As a kind of preferred version of locking and pressurizing screw system described in the utility model, wherein: described locking and pressurizing screw also comprises bar section, and described bar section surface is for smooth or be provided with micropore.
As a kind of preferred version of locking and pressurizing screw system described in the utility model, wherein: described the second screw thread is identical with pitch and the depth of thread of described female thread.
Adopt technical scheme described in the utility model, have following useful technique effect: the pressor effect that the angle axial stability that the unique design locking inner fixed support technology of device described in the utility model has and standard bone plate technology have forms the Downward addition effect each other, so that this combination locking and pressurizing screw system has good mechanics advantage, its fixing reliability is better than locking inner fixed support technology and standard bone plate technology, simultaneously locking and pressurizing shank of screw section surface spraying processing is grown into bone and is sprayed in the micropore at position, form synostosis, thereby obtain to fix biology, further improved the stability at bone-screw assemblies interface; So that screw assemblies described in the utility model system has further improved the fixing reliability of implant system with respect to standard bone plate and locking bone fracture plate system, this seems particularly important existing in osteoporosis situation.
Description of drawings
Fig. 1 is the sketch map of locking and pressurizing screw described in embodiment of this utility model.
Fig. 2 is the generalized section of blade plate described in another embodiment of this utility model.
Fig. 3 is the sketch map of locking and pressurizing screw system user mode described in the utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Shown in Fig. 1～3, among the figure, tip 1; Threaded portion 2; The first screw thread 201; Afterbody 3; The second screw thread 301a; Installing mechanism 302a; Bar section 4; Blade plate 5; Female thread 501; Skeleton 6.
As shown in Figure 1, Fig. 1 is the sketch map of locking and pressurizing screw described in embodiment of this utility model.In this embodiment, the locking and pressurizing screw is comprised of tip 1, threaded portion 2, bar section 4 and afterbody 3, described threaded portion 2 forms the first screw thread 201, described afterbody 3 is divided into pyramidal structure, it is larger to deviate from tip 1 one end diameters, and the pyramidal structure surface is provided with the second screw thread 301a, and pyramidal structure inside is provided with installing mechanism 302a, in this embodiment, installing mechanism 302a is the groove 302a of prismatic structure; Described the first screw thread 201 and the second screw thread 301a are that the pitch of coaxial threaded and the first screw thread 201 is greater than the pitch of the second screw thread 301a.
As shown in Figure 2, Fig. 2 is the generalized section of blade plate described in another embodiment of this utility model.Blade plate 5 shapes can be various, in this embodiment, blade plate 5 cooperates the shape on skeleton 6 surfaces, blade plate 5 is provided with the nail hole on it, be provided with the female thread 501 that matches with the second screw thread in the described nail hole, at this moment, the second screw thread is identical with pitch and the depth of thread of described female thread 501, is connected so that locking and pressurizing screw and blade plate 5 are connected press-fit by the second screw thread with female thread.
Referring to Fig. 1～3, the locking and pressurizing screw is made of tip 1, threaded portion 2, bar section 4 and afterbody 3, and afterbody 3 is pyramidal structure, and its surface is provided with the second screw thread 301a, and its inside is provided with installing mechanism 302a; The bottle opener of torque limiting is by the operation of installing mechanism 302a realization to the locking and pressurizing screw, and no matter which kind of shape installing mechanism 302a is, the bottle opener of torque limiting and installing mechanism 302a are complementary.Threaded portion 2 is similar or be equal to the screw thread design of standard cancellous bone screw, and its depth of thread and pitch are larger with respect to the second screw thread 301a.During use, threaded portion 2 is screwed into offside intra-articular fracture piece, and fracture line should be twisted in threaded portion 2, enters fully in the offside intra-articular fracture piece, and the resistance to plucking that threaded portion 2 provides is exerted oneself and is better than lock screw, and its effect is similar or be equal to cancellous bone screw.The depth of thread of the second screw thread 301a and pitch are less than the depth of thread and the pitch of threaded portion 2, and the second screw thread 301a is the part that realizes pressor effect between sclerite, also are the parts of realization and blade plate 5 lockings.
As shown in Figure 3, blade plate 5 shapes can be various, it is provided with female thread 501, the degree of depth of its pitch and screw thread is identical with the second screw thread 301a, female thread 501 and the locking that can realize with being connected between the second screw thread 301a between locking and pressurizing screw and the blade plate 5 realize that press-fit is threaded; Female thread 501 can also be connected with lock screw locking.
So-called homonymy intra-articular fracture piece refers to and locking bone fracture plate 5 contacted sides that so-called offside intra-articular fracture piece refers to the sclerite corresponding with homonymy intra-articular fracture piece.
The use procedure of relevant combination locking and pressurizing screw system described in the utility model in the concrete operation:
The first step: by the standard procedures flow process, sterilization spreads single, and exposes fracture by the standard procedures approach, the anatomical reduction fracture, and utilize Kirschner wire or the temporary fixed fracture of reduction forceps, perspective is confirmed to reset good;
Second step: blade plate 5 is placed in place, punched to offside intra-articular fracture piece in the ipsilateral fracture piece with the nail hole of operation target drill on blade plate 5, and measure the nail hole depth; Select the locking and pressurizing screw of appropriate length, bottle opener by torque limiting is screwed into skeleton with the locking and pressurizing screw, so that threaded portion 2 parts of locking and pressurizing screw enter offside intra-articular fracture piece fully, fracture line should be twisted in threaded portion 2, continuation is screwed into the locking and pressurizing screw, when the second screw thread 301a and female thread 501 come in contact and during move toward one another, pressurize between the sclerite, the locking and pressurizing screw drives blade plate 5 together to offside intra-articular fracture piece move toward one another, the mechanism description that this move toward one another forms is as follows: when the first screw thread 201 in the threaded portion 2 rotates a circle in skeleton, the second screw thread 301a and female thread 501 also rotate a circle, but because the pitch of the second screw thread 301a and female thread 501 is less than the pitch of the first screw thread 201 in the threaded portion 2, therefore the second screw thread 301a and female thread 501 rotations one are enclosed the distance of advancing and are rotated the distance that a circle advances less than the first screw thread 201 in the threaded portion 2 in skeleton, the first screw thread 201, the range difference that the second screw thread 301a and female thread 501 coaxial rotation produce will cause the locking and pressurizing screw to drive blade plate 5 together to offside intra-articular fracture piece move toward one another, to forming pressor effect between the intra-articular fracture piece, and quantize this pressure process.Probabilities loosening and the bone thread wearing and tearing occur at the bad stress of all directions to reduce screw-bone interface in the compressive stress that produces between blade plate 5 and the surface of bone, the frictional resistance efficient neutralization between locking bone fracture plate and the surface of bone under the effect of stress; Simultaneously the locking and pressurizing screw is connected with locking bone fracture plate 5 lockings and makes whole system have the angle axial stability, has avoided the screw sequential to become flexible, and is conducive to the lasting of compressive stress between blade plate and the surface of bone.So this utility model combines the advantage of locking inner fixed support technology and standard bone plate both techniques, so that the fixing reliability of this combination locking and pressurizing screw system is better than locking inner fixed support technology and standard bone plate technology, this fixing more reliable superiority seems particularly important existing in the osteoporosis situation.Can quantize the pressure process between the intra-articular fracture piece, reduction is to the dependence of bone density, when the press-fit locking occurs when the second screw thread 301a and female thread 501 rotate to proper angle, this pressure process stops, and the second screw thread 301a and female thread 501 are press-fitted the needed moment of torsion of locking and realize by the bottle opener of torque limiting.
The 3rd step: according to the operation needs, can be screwed into a plurality of devices described in the utility model at the suitable screw hole of locking bone fracture plate by identical flow process; According to the operation needs, also can be screwed into the other types screw at the suitable screw hole of locking bone fracture plate, for example lock screw or standard os integumentale screw.
The 4th step: the perspective affirmation reduction of the fracture and interior fixed position are good again, are seamed to successively skin after flushing wound surface and the definite hemostasis.
The pressor effect that the angle axial stability that the unique design locking inner fixed support technology of device described in the utility model has and standard bone plate technology have forms the Downward addition effect each other, so that this combination locking and pressurizing screw system has good mechanics advantage, its fixing reliability is better than locking inner fixed support technology and standard bone plate technology, simultaneously locking and pressurizing shank of screw section 4 surface sprayings processing is grown into bone and is sprayed in the micropore at position, form synostosis, thereby obtain to fix biology, further improved the stability at bone-screw assemblies interface; So that screw assemblies described in the utility model system has further improved the fixing reliability of implant system with respect to standard bone plate and locking bone fracture plate system, this seems particularly important existing in osteoporosis situation;
The unique design of device described in the utility model has quantized the pressure process of intra-articular fracture piece, reduced the dependence of this pressure process to bone density, improved the safety of screw thread-bone interface, simultaneously can effectively protect screw assemblies and spongy bone interface, avoid bone-thread interface in the process of operation, to damage, so that the operation of screw assemblies described in the utility model system is less to the dependence of surgical experience, is conducive to the formation of this technology quantitative criteria and popularizes;
The unique design of device described in the utility model is so that system's operation reaches the fixedly raising of reliability, and the required implants quantity of whole fixedly fracture system reduces, and reduces medical treatment cost and patient suffering.Especially when treatment part articular fracture, blade plate 5 does not need too much to extend to key section, the key section of fracture does not need to be screwed into too much screw, the length of required like this blade plate 5 is less, be conducive to the attaching of blade plate 5 and skeleton, further the mechanical stability of the whole fixedly fracture of raising system reduces operation wound, effectively reduces blade plate and attaches the bad soft tissue complication that causes.
To sum up, the utlity model has following advantage:
One, the range difference that produces with the second screw thread and female thread coaxial rotation between the first screw thread and the skeleton forms the pressurization of intra-articular fracture piece, simultaneously being threaded between locking and pressurizing screw and the blade plate makes whole system form a stable integral body, has good angle axial stability.Thereby realized that " pressurization of intra-articular fracture piece " is integrated with " forming axial angle stability under the articular surface; support and rebuild metaphysis ", the one of " pressurization of intra-articular fracture piece " and " axial angle stability " turns to the absolute stability that the direct knitting of intra-articular fracture requires and has created good condition, the principle of this technology is as follows: pressurization has realized the close contact between the sclerite between the intra-articular fracture piece, the axial angle stability that locking between locking and pressurizing screw and the blade plate forms so that internal fixation system in muscle contraction, physiotherapy, or avoid movement between any fracture fragments under the effect of the various deformation forces that produce of partly or entirely bearing a heavy burden, keep the close contact between fracture fragments.
Two, the range difference that produces with the second screw thread and female thread coaxial rotation between the first screw thread and the skeleton forms the pressurization of intra-articular fracture piece, this process is so that produce compressive stress between blade plate and the surface of bone, this compressive stress is so that exist frictional force between blade plate and the surface of bone, frictional force between locking bone fracture plate and the surface of bone partly neutralizes and makes up the locking and pressurizing screw system at the bad stress of all directions, reduce screw-bone interface probabilities loosening and the bone thread wearing and tearing occur under the effect of stress, so that the displacement of secondary and unsettled probability descend; Locking and pressurizing screw and blade plate have the angle axial stability, are conducive to continuing of compressive stress between locking bone fracture plate and the surface of bone; Form the Downward addition effect between " pressurization " and " locking " two kinds of effects.In the standard bone plate technology of prior art, the tension force that relies on the tighten the screws nail to produce makes blade plate produce compressive stress to surface of bone, and the frictional force between blade plate and the surface of bone obtains stable blade plate and fixes; In existing locking inner fixed support technology, the angular-dependent axial stability obtains stable blade plate and fixes; And in this utility model, the fixing reliability of this combination locking and pressurizing screw system is better than locking inner fixed support technology and standard bone plate technology, and this seems particularly important existing in osteoporosis situation.
Three, improve the security reliability of intra-articular fracture piece pressurization, in the process that realizes the pressurization of intra-articular fracture piece, the interface between effective protector and the spongy bone; When the first screw thread advanced to certain position in skeleton, the second screw thread and female thread came in contact and coaxial rotation in opposite directions, form pitch difference between the two, realized the pressurization of intra-articular fracture piece; Be press-fitted the sample locking with female thread behind the second screw thread rotation certain angle, the second screw thread and female thread be not when rotating, because the pressure process that pitch difference causes stops after the locking; When realizing like this pressurization of intra-articular fracture piece, avoid the screw overtorquing, cause the interface cut damage between spongy bone and the screw thread, so that interior solid failure.
Four, improve the operability of intra-articular fracture piece pressurization; Under the prior art, requiring lag screw to rely on blade plate or pad that cortical bone is applied enough large preload makes skeleton and inside-fixture produce firm set, avoid the movement between any fracture fragments, when the bone mechanical properties of lag screw operating area too poor, can't apply enough large preload to lag screw, can't realize these therapeutic purposes; This utility model is realized the integrated of " pressurization of intra-articular fracture piece " and " axial angle stability ", the target of intra-articular fracture piece pressurization is to realize the close contact of sclerite, and is avoiding the movement between any fracture fragments to realize by the axial angle stability that screw and blade plate locking form under the various stress; The close contact of realization sclerite only needs the preload of suitable size, does not need enough large preload, and the dependence that this has reduced the skeletal mechanics of screw operating area has improved the operability of intra-articular fracture piece pressurization.
Five, realize the quantification of articular surface fracture piece pressure process, reduce the operator to the dependence of experience; Realize pressurization between the intra-articular fracture piece by " pitch difference " that can quantize, quantized the pressure process of intra-articular fracture piece, reduce the operator to the dependence of experience, do not have the gradient of learning curve, the formation that is conducive to this technology quantitative criteria reaches to be popularized.
Six, realize the quantification of lock-out state between screw and the blade plate; The second screw thread can be realized the quantification of the second screw thread and female thread lock-out state by the torque limiting bottle opener.
Seven, locking and pressurizing shank of screw section so that the numerous micropore of surperficial quantity of formation in bone will be grown into micropore like this, forms synostosis, thereby obtains to fix biology, has further improved the stability of Pin-bone interface through spray treatment; This seems particularly important existing in osteoporosis situation;
Eight, compare with present main flow medical skill and device, adopt less inside-fixture to implant and just can realize the Therapeutic Principle of articular fracture, and operation wound is less, medical expense significantly reduces;
Nine, when treatment needs the part articular fracture of operation, the locking bone fracture plate length that device described in the utility model needs is shorter, reduce operation wound, short locking bone fracture plate can be better and the skeleton attaching, further improved the mechanical stability of whole device, effectively reduced blade plate and attach the bad soft tissue complication that causes.
It should be noted that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment this utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. locking and pressurizing screw system, comprise locking and pressurizing screw and blade plate (5), described locking and pressurizing screw comprises tip (1), threaded portion (2) and afterbody (3), described threaded portion (2) forms the first screw thread (201), it is characterized in that: described afterbody (3) is taper, it is larger to deviate from tip (1) one end diameter, and the surface is provided with the second screw thread (301a), is provided with installing mechanism (302a) in the afterbody; The pitch of described the first screw thread (201) is greater than the pitch of the second screw thread (301a); Described blade plate forms through hole on (5), being provided with the female thread (501) that matches with the second screw thread (301a) in the described through hole, so that the locking and pressurizing screw is connected 501 by the second screw thread (301a) with female thread with blade plate (5)) press-fit is connected.
2. locking and pressurizing screw system according to claim 1, it is characterized in that: described locking and pressurizing screw also comprises bar section (4), described bar section (4) surface is for smooth or be provided with micropore.
3. locking and pressurizing screw system according to claim 1, it is characterized in that: described the second screw thread (301a) is identical with pitch and the depth of thread of described female thread (501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526941 CN202892065U (en) | 2012-10-15 | 2012-10-15 | Inflating locking screw system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526941 CN202892065U (en) | 2012-10-15 | 2012-10-15 | Inflating locking screw system |
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| Publication Number | Publication Date |
|---|---|
| CN202892065U true CN202892065U (en) | 2013-04-24 |
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| CN 201220526941 Expired - Fee Related CN202892065U (en) | 2012-10-15 | 2012-10-15 | Inflating locking screw system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000648A (en) * | 2014-05-15 | 2014-08-27 | 南华大学 | Positioning platform of sighting device positioning device |
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2012
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000648A (en) * | 2014-05-15 | 2014-08-27 | 南华大学 | Positioning platform of sighting device positioning device |
| CN104000648B (en) * | 2014-05-15 | 2016-01-20 | 南华大学 | The locating platform of sight positioner |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20131015 |