CN209629793U - Pitman wears rod bracket and spine nail bar device - Google Patents

Abstract

The utility model provides a kind of pitman, wears rod bracket and spine nail bar device, is related to the field of medical instrument technology.The pitman includes cylindrical barred body, is arranged with spiral helicine wire casing on the lateral wall of barred body, and the two sides side wall of wire casing is the curve of rounding off along the radial projection on barred body lateral wall of barred body；This wears rod bracket for clamping above-mentioned pitman, including support and gripping arm, and one end of gripping arm is articulated on support, and the other end is equipped with the gripping body for clamping pitman, slidably connects at least two adapter sleeves along its length on support；The spine nail bar device includes pedicle screw, extends casing, lock-screw and above-mentioned wear rod bracket.The pitman possesses high-intensitive bending, elastic equilibrium ability, can be realized system dynamic calibration effect while can effectively reduce the problems such as stress is concentrated.

Description

Pitman wears rod bracket and spine nail bar device

Technical field

The utility model relates to the field of medical instrument technology more particularly to a kind of pitman, wear rod bracket and spine nail stick Device.

Background technique

In daily life, since many reasons such as human spine's disease, spinal trauma etc. cause the backbone of people to be damaged Wound, causes backbone not to be able to maintain normal physiological status, causes the symptoms such as patient's hunchback, lateral bending, can not normal life.

In spinal surgery, pedicle screw fixation system helps patient to restore the normal of backbone usually as internal fixation system Form, pedicle screw fixation system mainly include pedicle screw and pitman, in use, first that pedicle screw implantation backbone is each Then the predetermined position of segment connects the nail seat of two or more pedicle screws on pitman and the ipsilateral pedicle of vertebral arch of backbone It connects, ipsilateral pedicle screw is linked together, accordingly more piece spinal bone links together, to realize pitman to a ridge Stabilization between column segment is born instead of backbone as trunk is bent and stretched, lateral bending or torsion act generating to backbone Torque load.

Recovery capacity is poor after existing pitman stress and deformation, is unable to maintain that the normal morphology of patient spine, is unfavorable for suffering from The treatment of person；When serious, pitman stress can even fracture, and the end face that fractures generates sharp burr, not only needs to increase subsequent The operating procedure of pitman is replaced, and the later period causes the probability of complication bigger.

That is, the Bending Deformation ability of existing pitman is poor, easily snap off, is unfavorable for the treatment of patient.

Utility model content

The purpose of this utility model is to provide a kind of pitman, rod bracket and spine nail bar device are worn, it is existing to solve The technical issues of Bending Deformation ability of pitman present in technology is poor, easily snaps off, and is unfavorable for patient's treatment.

Pitman provided by the utility model, including cylindrical barred body are arranged with helical form on the lateral wall of the barred body Wire casing, the two sides side wall of the wire casing is rounding off along the radial projection on the barred body lateral wall of the barred body Curve.

Further, the curve includes multiple " Ω " shape sections being successively smoothly connected by linking arm, and adjacent The opening direction of " Ω " shape section described in two is opposite.

Further, running through at the center of the barred body has centre bore.

Another of the utility model is designed to provide one kind and wears rod bracket, for clamping above-mentioned pitman, including branch Seat and gripping arm, one end of the gripping arm are articulated on the support, and the other end is equipped with the folder for clamping the pitman Take mechanism；

At least two adapter sleeves are slidably connected on the support along its length, the adapter sleeve is located at described side by side The same side of support, for matching socket with extension casing；The rotary motion trace of the gripping body is with the adapter sleeve vertical Projection on direction is corresponding.

Further, it is provided along its length sliding slot on the side side wall of the support, is connected on the adapter sleeve Clamping joint, the clamping joint sliding are connected in the sliding slot；

The top surface of the support is provided along its length waist-shaped hole, and the waist-shaped hole and the sliding slot penetrate through, the card Connector position corresponding with the waist-shaped hole is equipped with threaded hole, and threaded fastener, which passes through the waist-shaped hole and engages with threaded hole, matches It closes, the clamping joint is lock on the support.

Further, screw thread is engaged with locking member on the side wall of the adapter sleeve, and the locking end of the locking member is towards institute State the inside of adapter sleeve.

Another of the utility model is designed to provide a kind of spine nail bar device, including pedicle screw, extending sleeve Pipe, lock-screw and it is above-mentioned wear rod bracket, the pedicle screw includes rivet nut and nail seat interconnected, and the rivet nut is used for It is implanted into the pedicle of vertebral arch position of patient's vertebra, the connecting pin for extending casing can be detachable affixed with the nail seat, and institute Nail seat, the extension casing are stated equipped with corresponding through slot, the slot that runs through is used to pass through for the pitman；

The cavity for extending inside pipe casing and being provided along its length perforation, the lock-screw can pass through the sky Chamber engages cooperation with the locking internal screw thread inside the nail seat.

Further, the axial cross section shape of locking internal screw thread is L shape, the lock of the lock-screw inside the nail seat Tight external screw thread matches with the locking internal screw thread.

Further, the inner wall for extending casing connecting pin is equipped with embedding groove, the extension casing and the vertebral arch When the nail seat connection of root screw, the nail seat is embedded in the embedding groove, the inner sidewall of the nail seat and the extension casing Inner sidewall it is consistent.

Further, the inner wall for extending casing is equipped with guiding internal screw thread, the extension casing and the pedicle of vertebral arch screw When the nail seat connection of nail, the guiding internal screw thread is connect with the locking internal screw thread, spiral shell in the lock-screw and the guiding Line engagement cooperation, and the locking internal screw thread can be screwed in from the guiding internal screw thread.

The utility model pitman wears having the beneficial effect that for rod bracket and spine nail bar device

Pitman provided by the utility model wears rod bracket and spine nail bar device, wherein pitman includes as connection The barred body of matrix, barred body are equipped with the wire casing that can enhance barred body bending ability；Wherein, wearing rod bracket includes the branch as pedestal , it is articulated with the gripping arm for clamping pitman and can rotate on support, is also connected with and extends the tight of casing for fixed Gu set；Wherein, spine nail bar device includes the pedicle screw connecting for the pedicle of vertebral arch position with patient spine, is used for and vertebra Pedicle screw connection plays the role of extension and wears the extension casing of rod bracket, for in the nail seat for penetrating pedicle screw with fixation The lock-screw locked of extension casing and above-mentioned wear rod bracket for penetrating pitman in pedicle screw.

When operation, first by the pedicle of vertebral arch position of pedicle screw implantation patient spine, two neighboring or multiple spinal bones Pedicle screw is implanted on ipsilateral pedicle of vertebral arch position, ipsilateral pedicle screw arrangement is a column；Extend the number of casing It is equal with the number of pedicle screw, the nail seat of the connecting pin for extending casing and pedicle screw is connected one to one one Rise, extend on casing through slot in nail seat in the corresponding perforation of slot, the nail seat and extension casing of same column through slot It forms linear type and penetrates chamber；It is packed into lock-screw in the cavity for extending casing, then adjusting wears rod bracket make-up and is solidly set on branch Position on seat keeps it corresponding with sleeve position is extended, adapter sleeve and same column is extended casing and correspond socket, and is fixed on Extend the setting position on casing；Pitman is clamped on the gripping body for wearing rod bracket gripping arm, then around gripping arm Gripping arm is rotated with the articulated section of support, gripping arm drives pitman to rotate around articulated section, and the free end of pitman penetrates chamber certainly One end insertion, and with gripping arm continue to rotate be fully inserted into penetrate it is intracavitary；Pitman penetrates after the completion of process, using outer Lock-screw is screwed in the locking internal screw thread of nail seat, pitman is accordingly pressed on nail by portion's operating member rotation lock screw Running through in slot on seat, pitman and gripping body are detached from, will then wear rod bracket and be removed from extension casing, and will extension Casing is nailed on from pedicle of vertebral arch screw and is removed, and completes operation.The pedicle of vertebral arch of the adjacent ridge spinous process of the seventh cervical vertebra is limited work by the connection of pitman With the torque load that the various movements of patient generate acts on pitman, to reduce backbone stress, promotes the recovery of backbone.

Wherein, the lateral wall of pitman barred body is equipped with spiral helicine wire casing, and wire casing changes the smooth of barred body lateral wall Property, the bending place on barred body lateral wall increases, and bending place deformation quantity is much larger than the deformation quantity at smooth place, to increase the curved of barred body Bent deformability reduces the occurrence of barred body stress fractures, and improves the comfort that patient uses pitman, and reduce due to even The needs that fracture of taking over the baton increase replacement pitman operation secondary injury and medical expense caused by patient；This Outside, the deformation range of barred body wire casing formation bending place is larger, and the rigidity stretching that the bending of barred body stress is subject to is less, so that it is guaranteed that stick The recovery capacity of barred body when body does not stress reduces barred body itself and non-reversible deformation occurs, and influences treatment effect to backbone locating bias The occurrence of fruit；In addition, the two sides side wall of wire casing is rounding off, when barred body stress, the side wall stress of wire casing is more equal It is even, it causes stress to concentrate due to locally bending sharp to reduce barred body, is easy to split and lead to stick when barred body stress, at this The occurrence of body fractures accordingly further increases the recovery capacity of barred body Bending Deformation, extends the service life of pitman.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is that spine nail bar device provided by the embodiment of the utility model penetrates pitman in the nail seat of pedicle screw The first viewing angle constructions schematic diagram；

Fig. 2 is that spine nail bar device provided by the embodiment of the utility model penetrates pitman in the nail seat of pedicle screw The second viewing angle constructions schematic diagram；

Fig. 3 is the pedicle screw in spine nail bar device provided by the embodiment of the utility model when being two column, pedicle of vertebral arch Screw, the attachment structure schematic diagram for extending casing, pitman and lock-screw；

Fig. 4 is the schematic cross-sectional view for extending the direction casing A-A in Fig. 3；

Fig. 5 is that the three dimensional structure diagram after extending casing is removed in Fig. 3；

Fig. 6 is four kinds of structural schematic diagrams of pitman provided by the embodiment of the utility model；

Fig. 7 is that the nail seat of lock-screw and pedicle screw is matched in spine nail bar device provided by the embodiment of the utility model Close three dimensional structure diagram when engagement；

Fig. 8 is the schematic cross-sectional view in the direction B-B in Fig. 7；

Fig. 9 is the partial enlargement diagram of C in Fig. 8.

Icon: 1- barred body；11- wire casing；111- " Ω " shape section；12- centre bore；2- support；21- sliding slot；22- Waist-shaped hole；3- gripping arm；31- gripping body；4- adapter sleeve；41- clamping joint；42- threaded fastener；43- locking member； 5- pedicle screw；51- rivet nut；52- nail seat；521- locks internal screw thread；6- extends casing；61- embedding groove；62- It is oriented to internal screw thread；63- locking hole；7- lock-screw；71- locking external thread；8- runs through slot；9- connector.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

The present embodiment provides a kind of pitmans, as shown in fig. 6, including cylindrical barred body 1, winding on the lateral wall of barred body 1 There is spiral helicine wire casing 11, the two sides side wall of wire casing 11 is round and smooth along the radial projection on 1 lateral wall of barred body of barred body 1 The curve of transition.

The present embodiment also provides one kind and wears rod bracket, as depicted in figs. 1 and 2, for clamping above-mentioned pitman, including support 2 and gripping arm 3, one end of gripping arm 3 be articulated on support 2, the other end is equipped with gripping body 31 for clamping pitman；Branch At least two adapter sleeves 4 are slidably connected on seat 2 along its length, adapter sleeve 4 is located at the same side of support 2 side by side, is used for Socket is matched with casing 6 is extended；The rotary motion trace of gripping body 31 is corresponding with the projection of adapter sleeve 4 in the vertical direction.

The present embodiment also provides a kind of spine nail bar device, as shown in figs. 1-9, including pedicle screw 5, extending sleeve Pipe 6, lock-screw 7 and it is above-mentioned wear rod bracket, pedicle screw 5 includes rivet nut 51 interconnected and nail seat 52, and rivet nut 51 is used In the pedicle of vertebral arch position of implantation patient's vertebra, the connecting pin for extending casing 6 can be detachable affixed with nail seat 52, and nail seat 52, extend casing 6 and run through slot 8 equipped with corresponding, be used to pass through for pitman through slot 8；Extend inside casing 6 along its length The cavity that direction is equipped with perforation is spent, lock-screw 7, which can pass through cavity and engage with the locking internal screw thread 521 inside nail seat 52, matches It closes.

Pitman provided in this embodiment wears rod bracket and spine nail bar device, wherein pitman includes being used as linker The barred body 1 of body, barred body 1 are equipped with the wire casing 11 that can enhance 1 bending ability of barred body；Wherein, wearing rod bracket includes as pedestal Support 2, the gripping arm 3 for clamping pitman and can rotate is articulated on support 2, is also connected with for fixing extending sleeve The adapter sleeve 4 of pipe 6；Wherein, spine nail bar device includes the pedicle screw connecting for the pedicle of vertebral arch position with patient spine 5, for connect with pedicle screw 5 play the role of extension with the fixed extension casing 6 for wearing rod bracket, for penetrating pedicle of vertebral arch Lock-screw 7 that extension casing 6 in the nail seat 52 of screw 5 is locked and above-mentioned for pitman to be penetrated pedicle screw Rod bracket is worn in 5.

When operation, pedicle screw 5 is implanted into the pedicle of vertebral arch position of patient spine, two neighboring or multiple spinal bones first Pedicle screw 5 is implanted on ipsilateral pedicle of vertebral arch position, the ipsilateral arrangement of pedicle screw 5 is a column；Extend the number of casing 6 Mesh is equal with the number of pedicle screw 5, and the nail seat 52 of the connecting pin for extending casing 6 and pedicle screw 5 is corresponded and is connected Be connected together, extend on casing 6 through slot 8 with penetrate through in nail seat 52 through slot 8 is corresponding, the nail seat 52 and extending sleeve of same column Chamber is penetrated through the formation of slot 8 linear type on pipe 6；It is packed into lock-screw 7 in the cavity for extending casing 6, then adjusts and wears stick Position of the adapter sleeve 4 on support 2 on bracket keeps it corresponding with 6 position of casing is extended, adapter sleeve 4 and same column is extended casing 6 correspond socket, and are fixed on the setting position extended on casing 6；Pitman is clamped in and wears rod bracket gripping arm 3 On gripping body 31, gripping arm 3 is rotated then around the articulated section of gripping arm 3 and support 2, gripping arm 3 drives pitman around pivot joint Place's rotation, the free end of pitman is from one end insertion for penetrating chamber, and continuing to rotate to be fully inserted into and penetrate chamber with gripping arm 3 It is interior；Pitman penetrates after the completion of process, and using external operating unit rotation lock screw 7, lock-screw 7 is screwed in nail seat 52 It locks in internal screw thread 521, pitman is accordingly pressed on running through in slot 8 in nail seat 52, pitman and gripping body 31 are taken off From, it will then wear rod bracket and be removed from extension casing 6, and be removed casing 6 is extended from pedicle screw 5, completion Operation.Connection restriction effect of the pedicle of vertebral arch of the adjacent ridge spinous process of the seventh cervical vertebra by pitman, the torque load that the various movements of patient generate are made For pitman, to reduce backbone stress, promote the recovery of backbone.

Wherein, the lateral wall of pitman barred body 1 is equipped with spiral helicine wire casing 11, and wire casing 11 changes 1 lateral wall of barred body Planarization, the bending place on 1 lateral wall of barred body increases, and bending place deformation quantity is much larger than the deformation quantity at smooth place, to increase The Bending Deformation ability of barred body 1 reduces the occurrence of 1 stress of barred body fractures, and improves the comfort that patient uses pitman, and It reduces and needs to increase the feelings such as replacement pitman operation secondary injury and medical expense caused by patient since pitman fractures The generation of condition；In addition, the deformation range that 1 wire casing 11 of barred body forms bending place is larger, the rigidity that the bending of 1 stress of barred body is subject to is stretched It is less, so that it is guaranteed that when barred body 1 does not stress barred body 1 recovery capacity, reduce barred body 1 itself occur non-reversible deformation, to backbone Locating bias influences the occurrence of therapeutic effect；In addition, the two sides side wall of wire casing 11 is rounding off, when 1 stress of barred body, The side wall stress of wire casing 11 is more uniform, causes stress to concentrate due to locally bending sharp to reduce barred body 1, barred body 1 by It is easy the occurrence of splitting and barred body 1 is caused to fracture when power, at this, accordingly further increases the reply of 1 Bending Deformation of barred body Ability extends the service life of pitman.

The setting of wire casing 11 can make it possess high-intensitive bending, elastic equilibrium ability on pitman, realize that system is dynamic State rectification effect, while reducing the problems such as stress is concentrated.

Specifically, multistage can also be divided into and set as shown in fig. 6, the wire casing 11 on pitman barred body 1 can be continuously arranged It sets.

What needs to be explained here is that aforesaid operations process is only the description of operating procedure, the sequencing of operation is simultaneously unlimited It is fixed；In addition, " vertical direction " described in text is the orientation defined on the basis of the visual angle Fig. 1, it is not limited to spine nail bar device Orientation in actual use.

Due to including the two pieces of pedicles of vertebral arch in left and right in the spinal bone of people, it, can be in spinal bone or so two when practical operation It is implanted into pedicle screw 5 on the pedicle of vertebral arch of side, then carries out the company of penetrating as unit of the arranged in column pedicle screw 5 in side It takes over the baton operation, is compressed on the pedicle screw 5 of two sides after having pitman, as shown in Figure 3 and Figure 5, connector 9 can be used Two adjacent pitmans of left and right are linked together, and universal joint connection can be used in connector 9.Specifically, edge on support 2 Its length direction can be set there are three adapter sleeve 4, and wearing rod bracket can be achieved at the same time pitman to the company of three pedicle screws 5 It connects.

Specifically, the length for running through slot 8 in nail seat 52 can be greater than through the length of slot 8 by extending in the present embodiment on casing 6 Degree extends formation after casing 6 is connect with nail seat 52 and penetrates increasing across area for chamber, and gripping arm 3 clamps pitman rotation Track is arc, interferes obstruction caused by pitman through slot 8 when pitman insertion penetrates chamber to reduce, it is ensured that pitman Insertion penetrates the smoothness of chamber.

In the present embodiment, as shown in fig. 6, curve may include multiple " Ω " being successively smoothly connected by linking arm Shape section 111, and the opening direction of two neighboring " Ω " shape section 111 is opposite.It here is a kind of concrete form of the side wall of wire casing 11, The side wall of wire casing 11 be it is multiple be sequentially connected and successively opposite " Ω " the shape section 111 that be open, formation spiral interlocking structure, wire casing 11 The bending degree of side wall greatly increases, and the bend ability of deformation of barred body 1 accordingly enhances, to further increase the curved of pitman Bent deformability and recovery capacity reduce the rigidity that pitman is subject to and stretch the occurrence of even fractureing.

In the present embodiment, as shown in fig. 6, can run through at the center of barred body 1 has centre bore 12.Centre bore 12 is set The Bending Deformation ability that can further increase barred body 1 is set, it is corresponding to reduce the occurrence of pitman fractures.

In the present embodiment, as shown in Fig. 1 box Fig. 2, sliding slot can be provided along its length on the side side wall of support 2 21, clamping joint 41 is connected on adapter sleeve 4, the sliding of clamping joint 41 is connected in sliding slot 21；The top surface of support 2 is square along its length To waist-shaped hole 22 is equipped with, waist-shaped hole 22 and sliding slot 21 are penetrated through, and the position corresponding with waist-shaped hole 22 of clamping joint 41 is equipped with threaded hole, spiral shell Line fastener 42 passes through waist-shaped hole 22 and engages cooperation with threaded hole, and clamping joint 41 is lock on support 2.It here is adapter sleeve 4 The concrete form being slidably connected with support 2, when initial, threaded fastener 42 is in relaxation state, the clamping joint 41 of multiple adapter sleeves 4 It can be slided in the sliding slot 21 of support 2, adapter sleeve 4 is after the completion of the position on support 2 is adjusted, screw thread fastener 42, The head of screw and clamping joint 41 of threaded fastener 42 are clamped in the two sides of waist-shaped hole 22, so that clamping joint 41 is fixed on support 2 On, the corresponding position for completing adapter sleeve 4 on support 2 is fixed.

In the present embodiment, as shown in Fig. 2, locking member 43 can be engaged on the side wall of adapter sleeve 4 with screw thread, locking member 43 Locking end is towards the inside of adapter sleeve 4.When initial, locking member 43 is in relaxation state, and adapter sleeve 4, which is socketed on, to be extended on casing 6, And lock can be screwed inwardly into after the opposite position for extending casing 6 of adapter sleeve 4 determines along the length direction sliding for extending casing 6 Tight part 43, the locking end of locking member 43 are abutted with the outer wall for extending casing 6, realize that the position of adapter sleeve 4 and extension casing 6 is solid It is fixed.

In the present embodiment, as shown in figure 3, locking hole 63 can be equipped with by extending on casing 6, the position of locking hole 63 is located at tight Admittedly at the link position of set 4, after adapter sleeve 4 is socketed on extension casing 6, being screwed inwardly into locking member 43, locking member 43, which passes through, to be prolonged Locking hole 63 on long casing 6, and be connected to clamping joint 41 or screw in the threaded hole on clamping joint 41, to improve adapter sleeve 4 in the link position accuracy extended on casing 6, and improves adapter sleeve 4 and extend the firmness of the connection of casing 6.

In the present embodiment, as shown in figs. 7 to 9, the axial cross section shape that internal screw thread 521 is locked inside nail seat 52 can be L shape, locking external thread 71 and the locking internal screw thread 521 of lock-screw 7 match.The locking of the screw-in nail seat 52 of lock-screw 7 After internal screw thread 521, the protrusion of locking external thread 71 is caught in the groove body of locking internal screw thread 521, and L shape groove body can be in axial limit Lock-screw 7 processed is mobile, to reduce the occurrence of lock-screw 7 is slipped out of nail seat 52, improves lock-screw 7 and nail seat 52 threaded connection stability, it is ensured that lock-screw 7 acts on the locking of the pitman in nail seat 52.

In the present embodiment, as shown in figure 4, embedding groove 61 can be equipped with by extending on the inner wall of 6 connecting pin of casing, extend casing 6 with the nail seat 52 of pedicle screw 5 when connecting, and nail seat 52 is embedded in embedding groove 61, the inner sidewall of nail seat 52 and extends casing 6 inner sidewall is consistent.The cavity energy inside chamber and extension casing 6 after extension casing 6 is connect with nail seat 52, inside nail seat 52 A whole chamber is enough formed, and the side wall of chamber is consistent, so that it is guaranteed that lock-screw 7 is made in the guiding for extending 6 cavity of casing With the lower position precision into nail seat 52, phase is it is ensured that lock-screw 7 can smoothly be engaged in spiral shell in the locking of nail seat 52 In line 521, completes lock-screw 7 and engaged with the screw thread of nail seat 52.

In the present embodiment, as Figure 1-Figure 4, it can also be equipped with guiding internal screw thread 62 in the inner wall for extending casing 6, prolonged When long casing 6 is connect with the nail seat 52 of pedicle screw 5, guiding internal screw thread 62 is connect with locking internal screw thread 521, lock-screw 7 Cooperation is engaged with guiding internal screw thread 62, and being capable of the screw-in locking internal screw thread 521 of self- steering internal screw thread 62.Extend in casing 6 and leads Setting to internal screw thread 62, the merging of lock-screw 7 engage cooperation with guiding internal screw thread 62 first after extending in casing 6, then to Lower screw-in smoothly screws in the locking internal screw thread 521 of nail seat 52, and completion lock-screw 7 engages cooperation with nail seat 52；In guiding The setting of screw thread 62 can further increase the guiding role to its inside lock-screw 7, accordingly further increase lock-screw 7 go on smoothly with what nail seat 52 was cooperatively connected.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features It is equivalently replaced；And these are modified or replaceed, the utility model embodiment that it does not separate the essence of the corresponding technical solution The range of technical solution.

Claims (10)

1. a kind of pitman, which is characterized in that including cylindrical barred body (1), be arranged with spiral on the lateral wall of the barred body (1) The wire casing (11) of shape, the two sides side wall of the wire casing (11) is along the radial on the barred body (1) lateral wall of the barred body (1) Projection is the curve of rounding off.

2. pitman according to claim 1, which is characterized in that the curve includes multiple successively smooth by linking arm " Ω " the shape section (111) of transition connection, and the opening direction of two neighboring " Ω " the shape section (111) is opposite.

3. pitman according to claim 1, which is characterized in that running through at the center of the barred body (1) has centre bore (12)。

4. one kind wears rod bracket, for clamping pitman of any of claims 1-3, which is characterized in that including branch Seat (2) and gripping arm (3), one end of the gripping arm (3) are articulated on the support (2), and the other end is equipped with for clamping State the gripping body (31) of pitman；

It is slidably connected along its length at least two adapter sleeves (4) on the support (2), the adapter sleeve (4) position arranged side by side In the same side of the support (2), for matching socket with extension casing (6)；The rotary motion trace of the gripping body (31) with The projection of the adapter sleeve (4) in the vertical direction is corresponding.

5. according to claim 4 wear rod bracket, which is characterized in that on the side side wall of the support (2) along its length Direction is equipped with sliding slot (21), is connected with clamping joint (41) on the adapter sleeve (4), and clamping joint (41) sliding is connected in described In sliding slot (21)；

The top surface of the support (2) is provided along its length waist-shaped hole (22), the waist-shaped hole (22) and the sliding slot (21) Perforation, the clamping joint (41) position corresponding with the waist-shaped hole (22) are equipped with threaded hole, and threaded fastener (42) is across institute It states waist-shaped hole (22) and engages cooperation with threaded hole, the clamping joint (41) is lock on the support (2).

6. according to claim 4 or 5 wear rod bracket, which is characterized in that screw thread engages on the side wall of the adapter sleeve (4) Have locking member (43), the inside of the locking end of the locking member (43) towards the adapter sleeve (4).

7. a kind of spine nail bar device, which is characterized in that including pedicle screw (5), extend casing (6), lock-screw (7) and Wear rod bracket described in any one of claim 4-6, the pedicle screw (5) include rivet nut interconnected (51) and Nail seat (52), the rivet nut (51) are used to be implanted into the pedicle of vertebral arch position of patient's vertebra, and the connecting pin for extending casing (6) can It is detachable affixed with the nail seat (52), and the nail seat (52), the extension casing (6) run through slot equipped with corresponding (8), described to be used to pass through for the pitman through slot (8)；

Described to extend the cavity that perforation is provided along its length inside casing (6), the lock-screw (7) can pass through described The cavity locking internal screw thread (521) internal with the nail seat (52) engages cooperation.

8. spine nail bar device according to claim 7, which is characterized in that lock internal screw thread inside the nail seat (52) (521) axial cross section shape is L shape, the locking external thread (71) of the lock-screw (7) and the locking internal screw thread (521) match.

9. spine nail bar device according to claim 7 or 8, which is characterized in that described to extend the interior of casing (6) connecting pin Wall is equipped with embedding groove (61), when extension casing (6) connect with the nail seat (52) of the pedicle screw (5), the nail Seat (52) is embedded in the embedding groove (61), the inner sidewall of the nail seat (52) and the inner sidewall one for extending casing (6) It causes.

10. spine nail bar device according to claim 9, which is characterized in that the inner wall for extending casing (6), which is equipped with, leads To internal screw thread (62), when extension casing (6) connect with the nail seat (52) of the pedicle screw (5), spiral shell in the guiding Line (62) is connect with the locking internal screw thread (521), and the lock-screw (7) engages cooperation with the guiding internal screw thread (62), And the locking internal screw thread (521) can be screwed in from the guiding internal screw thread (62).