双锁式脊柱多轴螺钉技术领域 本发明涉及医疗器械领域，尤其涉及一种骨科内固定手术治疗时所使用的脊柱螺钉。 Spinal double locking polyaxial screw Technical Field  The present invention relates to the field of medical devices, and particularly to an in spinal orthopedic fixation screws for use in surgery. 背景技术 遗传、发育异常、创伤、慢性应激以及肿瘤和其它疾病会导致脊柱的病理状况，这降低了脊柱的柔韧性，限制了脊柱的运动范围。  genetic, developmental abnormalities, trauma, chronic stress as well as tumors and other diseases may lead to pathologic conditions of the spinal column, which reduces the flexibility of the spine, limiting the range of motion of the spine. 采用外科内固定手术对上述病理状况进行治疗是目前医学上常用的治疗方法。 Use of surgical fixation for treatment of pathological conditions described above is commonly used in medical treatment. 脊柱多轴螺钉多在胸椎、腰椎、腰骶、髂骨等脊柱的前路和后路的内固定手术中使用。 Polyaxial spinal screw fixation is often used in the anterior and posterior thoracic, lumbar, sacral iliac spine of the like. 目前使用的脊柱多轴螺钉的结构包括：u型钉座和螺钉本体，U型钉座的底部设置有安装孔，安装孔上方的U型钉座中设置有U型挡套，U型挡套的顶部卡设在U型钉座内壁上的卡槽中，U型挡套的外壁与U型钉座的内壁相互卡合且不发生相对转动，U型挡套的底部与其下方的U型钉座之间形成球面安装腔，螺钉本体的头部为球形头部，螺钉本体从U型钉座上的安装孔中伸出，其球形头部容纳在球面安装腔中、并能在安装腔中转动。 Currently spinal column polyaxial screw used include: u-nails and screws seat body, the bottom of the U-shaped anvil is provided with a mounting hole, the U-shaped anvil mounting holes provided above the U-shaped retaining sleeve, a U-shaped retaining sleeve the top of the card holder provided on the inner wall of the staple in a U-shaped slot, U-shaped retaining sleeve and the inner wall of the outer wall of each U-shaped card engagement anvil relative rotation does not occur, U-shaped staple with its bottom below the U-shaped retaining sleeve forming a spherical head mounting chamber body between the screw head spherical seat, the screw body extend from the mounting hole in the U-shaped staples seat, which spherical head accommodated in the spherical cavity of the installation and can be installed in the chamber rotation. 外科手术中，脊柱多轴螺钉与脊柱固定棒配合使用，通常先在病变脊柱两侧分别打入多个脊柱多轴螺钉，然后在每侧的脊柱多轴螺钉的U型挡套的U型槽中贯穿设置一根脊柱固定棒。 Surgery, spinal polyaxial screw and a spinal fixation rod with the use of, respectively, usually first into the polyaxial screw in a plurality of spinal lesions spine on both sides, then the U-shaped retaining sleeve in each side of the spine of the polyaxial screw of U-shaped grooves in fixing a spinal rod bored. 在椎间退变融合和脊柱畸形矫正手术中，需要利用脊柱多轴螺钉进行撑开、加压等矫形操作，而由于螺钉本体的球形头部可以在球面安装腔中转动，即螺钉本体与U型钉座会相对转动，在进行撑开和加压等矫形操作时椎体的抗旋转的效果较差，加大了手术难度，从而可能导致最终的矫形效果不理想。 Fusion in the intervertebral degeneration and spinal deformity correction surgery, the need to use multi-axial spinal distraction screws, orthopedic and other pressing operations, and because the spherical head of the screw body may be rotatably mounted in a spherical cavity, i.e., the screw body and the U relatively rotatable anvil type, during the pressing, and the like inferior vertebral distraction anti-rotation effect of orthopedic operations, increase the difficulty of operation, which may lead to eventual orthopedic not ideal. 发明内容 本发明需要解决的技术问题是：提供一种能大大方便进行撑开和加压等矫形操作，提高椎体抗旋效果的双锁式脊柱多轴螺钉。  The present invention is a technical problem to be solved: to provide a distraction and greatly facilitate pressing orthopedic operation, etc., to improve the anti-rotation effect of the vertebral Spinal double locking polyaxial screw.  为解决上述问题，本发明采用的技术方案是：双锁式脊柱多轴螺钉，包括：U型钉座和螺钉本体，U型钉座的底部设置有安装孔，安装孔上方的U型钉座中设置有U型挡套， U型挡套的外壁与U型钉座的内壁相互卡合且不发生相对转动，U型挡套的底部与其下方的U型钉座之间形成球面安装腔，螺钉本体的头部为球形头部，螺钉本体从U型钉座上的安装孔中向外伸出，其球形头部容纳在球面安装腔中、并能在安装腔中转动，U型挡套的顶部设置有挡套锁紧支钉，挡套锁紧支钉与U型钉座内壁之间螺纹配合连接，向下旋紧挡套锁紧支钉，挡套锁紧支钉能驱使U型挡套向下移动、直至U型挡套紧压在螺钉本体的球形头部上；所述的挡套锁紧支钉中设置有上下贯通的支钉安装孔，支钉安装孔中设置有压棒支钉， 压棒支钉与挡套锁紧支钉之间螺纹配合连接。  In order to solve the above problems, the present invention adopts the technical scheme is: Spinal double locking polyaxial screw, comprising: a U-shaped staple holder and a screw body, the bottom of the U-shaped anvil is provided with a mounting hole, the mounting hole above the U type anvil is provided with a U-shaped retaining sleeve, the inner wall of the U-shaped retaining sleeve and the outer wall of each U-shaped staples card holder engagement without relative rotation occurs between the spherical stopper sleeve is formed U-shaped with its bottom U-shaped anvil below mounting cavity, the body is spherical head of the screw head, the screw body mounting hole extending from the U-base of the staple outwardly, which spherical head accommodated in the spherical cavity of the installation, and is rotatably mounted in the chamber, U a top cover provided with a block type stopper nail is a locking sleeve, the locking sleeve retaining screw nail is between the inner wall of the U-shaped anvil and a mating connector, the locking sleeve downward nail is screwed stopper, the stopper nail is a locking sleeve can U-driven gear sleeve to move down until the U-shaped retaining sleeve pressed onto the spherical head of the screw body; nail is provided with a mounting hole vertically penetrating the stopper nail is in the locking sleeve, the mounting hole nail is nail is provided with a pressure rod, the threaded rod between the pressure jacket with the stopper nail is fitted the locking nail is connected.  进一步地，前述的双锁式脊柱多轴螺钉，其中，U型挡套的外壁上设置有限位凸块， 所述的限位凸块卡设在U型钉座内壁上的限位凹槽中，所述的限位凸块能在限位凹槽中上下移动。  Further, the double-locking polyaxial screw spine, wherein the outer wall of the U-shaped sleeve provided with a limit stop bump, the bump stopper provided on the card anvil inner wall of the U-shaped stopper recess, the protrusion limiting movement of the stopper up and down in the groove.  进一步地，前述的双锁式脊柱多轴螺钉，其中，所述的压棒支钉的底部设置有凸尖。  Further, the aforementioned double locking Spinal polyaxial screw, wherein the bottom of the push bar of the nail is provided with a convex tip.  本发明的有益效果：在U型钉座中设置了带压棒支钉的挡套锁紧支钉，挡套锁紧支钉向下旋紧时能驱使U型挡套向下移动、直至U型挡套紧压在螺钉本体的球形头部上，这样螺钉本体与U型钉座之间不再发生相对转动，从而大大方便了手术中进行撑开和加压等矫形操作，提高了椎体抗旋效果，另外，向下旋紧压棒支钉，使其紧压在脊柱固定棒上，从而起到锁定脊柱固定棒的作用。  Advantageous effects of the invention: the stopper sleeve is provided with a push bar locking nail is supported in the U-shaped staples of the staple holder, could drive the U-shaped stopper sleeve when the stopper sleeve moves downwards the locking nail is screwed down until the U-shaped retaining sleeve pressed onto the spherical head of the screw body, no relative rotation for other orthopedic distraction and pressing operations between the screw body and the U-shaped so that anvil, thus greatly facilitating the operation, increasing the anti-rotation effect of the vertebral body, in addition, the push bar nail is screwed down, it is pressed against the spinal fixation rod, which play the role of locking a spinal fixation rod. 附图说明 图1是本发明所述的双锁式脊柱多轴螺钉使用状态下的结构示意图。 BRIEF DESCRIPTION  FIG. 1 is a schematic view of the double locking polyaxial screw Spinal use state of the present invention.  图2是图1中U型钉座的结构示意图。  FIG. 2 is a schematic view of a U-shaped anvil configuration in FIG. 1.  图3是图2中U型钉座俯视方向的结构示意图。  FIG. 3 is a schematic top view of the direction of the U-shaped staple holder 2 of FIG.  图4是图1中U型挡套的结构示意图。  FIG. 4 is a schematic structural diagram of FIG type 1 U gear sets.  图5是图1中挡套锁紧支钉与压棒支钉之间的连接结构示意图。  FIG. 5 is a diagram showing a connection structure between a block in FIG. 1 the locking nail is set with a staple push bar support. 具体实施方式 下面结合附图和最优实施方式对本发明作进一步地详细说明。 DETAILED DESCRIPTION  accompanying drawings and the following detailed description of the best mode of the present invention will be further.  如图1、图2、图3、图4、图5所示，双锁式脊柱多轴螺钉，包括：U型钉座I和螺钉本体2，U型钉座I的底部设置有安装孔4，安装孔4上方的U型钉座I中设置有U型挡套3， U型挡套3的外壁与U型钉座I的内壁相互卡合且不发生相对转动，U型挡套3的底部与其下方的U型钉座I之间形成球面安装腔，螺钉本体2的头部为球形头部21，螺钉本体2从U 型钉座I上的安装孔4中向外伸出，其球形头部21容纳在球面安装腔中、并能在安装腔中转动，U型挡套3的顶部设置有挡套锁紧支钉5，挡套锁紧支钉5与U型钉座I内壁之间螺纹配合连接，向下旋紧挡套锁紧支钉5，挡套锁紧支钉5能驱使U型挡套3向下移动、使其紧压在螺钉本体2的球形头部21上，U型挡套3的外壁上还设置有限位凸块31，所述的限位凸块31卡设在U型钉座I内壁上的限位凹槽11中，限位凸块31能在限位凹槽11中上下移动，限位  1, 2, 3, 4, 5, the double lock polyaxial spinal screw, comprising: U-nails and screws I seat body 2, the bottom of the U-shaped staple is provided with a seat I mounting holes 4, U anvil type I 4 above the mounting hole is provided in the U-shaped stopper sleeve 3, U-shaped retaining sleeve and the outer wall of the U-shaped anvil 3 I of the inner wall engaged with each other without relative rotation occurring, U-shaped stopper forming a spherical head mounting cavity, the screw body 2 between the bottom of its U-shaped sleeve anvil 3 I below 21 projecting outwardly, the screw body 2 from the U-shaped mounting hole anvil spherical head 4 of the I which the spherical head 21 housed and rotatably mounted in a spherical cavity in the mounting cavity, the top of the U-shaped stopper sleeve 3 is provided with a stopper nail is a locking sleeve 5, the stopper nail is a locking sleeve 5 and the U-shaped anvil I screwed connection between the inner wall, tighten down the locking nail is blocking sleeve 5, the stopper 5 can set the locking nail is driven by a U-shaped stopper sleeve 3 is moved downwardly, it is pressed against the spherical head of the screw body 2 21, the outer wall of the U-shaped stopper sleeve 3 is further provided with a limit projection 31, the stopper protrusion 31 is provided on the card holder the inner wall of the U-shaped staples I stopper grooves 11, the stopper protrusion 31 move up and down in the retaining groove 11, the stopper 块31与限位凹槽11的配合起到了对U型挡套3的限位作用；所述的挡套锁紧支钉5中设置有上下贯通的支钉安装孔51，支钉安装孔51中设置有压棒支钉6，所述的压棒支钉6与挡套锁紧支钉5之间螺纹配合连接，压棒支钉6的底部设置有凸尖61。 Block 31 mating with the retaining groove 11 plays a limiting role in the U-shaped stopper sleeve 3; said locking nail is blocking sleeve 5 is provided with a vertically penetrating staple support mounting hole 51, the mounting hole 51 nail is push bar is provided with a nail is 6, the pressure rod 6 with the nail is connected to the threaded sleeve locking nail is between the stopper 5, the bottom of the push bar nail is provided with a lobe 61 6.  手术时，在病变脊柱两侧分别打入多个双锁式脊柱多轴螺钉，然后分别调整每个脊柱多轴螺钉上的U形钉座I的方位，以便穿设脊柱固定棒8，再将脊柱固定棒8贯穿安装在每侧的脊柱多轴螺钉的U型挡套3中的U型槽中，然后再向下旋紧挡套锁紧支钉5，挡套锁紧支钉5驱使U型挡套3向下移动、使其紧压在螺钉本体2的球形头部21上，这样球形头部21就不会在球面安装腔中转动，即螺钉本体2与U型钉座I之间不会发生相对转动， 也即挡套锁紧支钉5使螺钉本体2与U型钉座I相互锁定，在进行撑开、加压等操作时，螺钉本体2与U型钉座I之间不再发生相对转动，从而大大方便了手术中进行撑开和加压等矫形操作，提高了椎体抗旋效果。  surgery, in the lesion of the spine respectively on both sides into a plurality of double lock polyaxial spinal screw, and then were adjusted orientation of each U-shaped spinal staple holder on the I polyaxial screw, penetrating fixing the spinal rod to 8 U-shaped retaining sleeve. 3 of the U-shaped groove, and then through the spinal fixation rod 8 mounted on each side of the spine of the polyaxial screw, and then tighten down the locking nail is blocking sleeve 5, the stopper nail is a locking sleeve 5 drives the U-shaped stopper sleeve 3 is moved downward, it is pressed against the spherical head 21 of the screw body 2, so that the spherical head 21 will not be mounted rotatably in the spherical cavity, i.e., the screw body 2 and the U-shaped anvil when relative rotation occurs between the operation I, i.e. block 5 sets of locking the screw nail is a U-shaped main body 2 and the anvil I locked to each other during the expansion, compression and the like, the screw body 2 and the U-shaped anvil no relative rotation occurs between the I, thus greatly facilitating the operation for other orthopedic distraction and pressing operations, improving the anti-rotation effect of the vertebral body. 再向下旋紧压棒支钉6使其底部的凸尖61紧压在脊柱固定棒8表面，从而起到了锁定脊柱固定棒8的作用，凸尖61的设`置使得脊柱固定棒的锁定效果更加理想。 Then tightened down on support rod 6 so that the staple 61 pressed against the bottom of the dimples 8 on the surface of a spinal fixation rod, thus acts as a locking spinal fixation rod 8, the spur 61 is provided `set such that the spinal fixation rod locking the effect is more ideal.