CN2617325Y

CN2617325Y - Bone screw

Info

Publication number: CN2617325Y
Application number: CN 03219210
Authority: CN
Inventors: 丁正林; 俞平; 陆士平
Original assignee: XINRONG MEDICAL INSTRUMENT CO Ltd ZHANGJAGANG CITY
Current assignee: XINRONG MEDICAL INSTRUMENT CO Ltd ZHANGJAGANG CITY
Priority date: 2003-01-09
Filing date: 2003-01-09
Publication date: 2004-05-26
Anticipated expiration: 2013-01-09

Abstract

The utility model relates to a bone nail, comprising a nail body with the surface provided with thread, wherein, a sphere is arranged at the top end of the nail body; the middle part of the spring locking piece is provided with a sphere cavity matched with the sphere, and the sphere is embedded in the sphere cavity; the spring locking piece at the side of the sphere cavity is provided with a plurality of notches; the middle part at the lower part of the universal base is provided with a hollow cavity, the spring locking piece is embedded in the hollow cavity through a convex ring at the lower side of the universal base, and the upper part of the universal base is provided with an open slot which is used to arrange the bone stick; a locking device of the universal base is arranged on the universal base at the upper part of the bone stick. The utility model has the advantages of skillful design, convenient operation and clinical installation, flexible adjustment, safe and reliable fixation.

Description

The synthetism nail

This utility model belongs to spinal internal fixation system, relates to a kind of synthetism nail of spinal fixation.

In orthopedic medical device, many places all can use the synthetism nail, a kind of synthetism nail that is used for spinal internal fixation system is arranged, its structure mainly includes the nail body, the nail surface is provided with screw thread, during clinical use, the nail body portion that synthetism nail bottom is provided with screw thread can be screwed in the bone, the upper end of nail body then can be fixed on the synthetism apparatus, on blade plate or synthetism rod, and every blade plate or synthetism rod all must could interfix with bone by some synthetisms nails and connect, still, because the nail body portion that this synthetism is followed closely can not be regulated at any angle, therefore, synthetism nail more than three or three is connected in line on blade plate or synthetism rod, and its installation difficulty is bigger, and it is very inconvenient to use.

The purpose of this utility model is to provide a kind of nail body can carry out arbitrarily angled adjusting, clinically installs and uses convenient reliable synthetism nail.

For realizing the purpose of this utility model, a kind of synthetism nail, comprise the nail body, the surface of nail body is provided with screw thread, described nail body upper end is set with a spheroid, the elastic locking piece middle part offers the spherical cavity with the corresponding cooperation of spheroid, spheroid is embedded in spherical cavity, be positioned on the lateral elastic locking piece of spherical cavity and offer some notches, the centre of universal base bottom offers hollow cavity, elastic locking piece is embedded in hollow cavity by the bulge loop of its following side, and the top of universal base offers the open slot that is used to be provided with the synthetism rod, and the universal base on synthetism rod top is provided with the universal base locking device.

The utility model has the advantages that: this synthetism pin structure is ingenious, and is clinical easy to install, regulates flexibly, fixing safe and reliable.

Below in conjunction with accompanying drawing this utility model is described in further detail:

Fig. 1 is the structural representation of a kind of synthetism nail of this utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the side view of a kind of synthetism langrage lock dog shown in Fig. 1 and 2;

Fig. 4 is the vertical view of Fig. 3;

The structural representation of the another kind of synthetism nail of Fig. 5 this utility model;

Fig. 6 is the side view of Fig. 5;

Fig. 7 is the side view of the another kind of synthetism langrage lock dog shown in Fig. 5 and 6;

Fig. 8 is the vertical view of Fig. 7.

1, nail body, 2, screw thread, 3, spheroid, 4, elastic locking piece, 5, spherical cavity, 6, notch, 7, universal base, 8, hollow cavity, 9, bulge loop, 10, the synthetism rod, 11, open slot, 12, fastener hole, 13, nut, 14, the internal lock support pin.

As Fig. 1,2, shown in 3 and 4, a kind of structure of synthetism nail, comprise nail body 1, the surface of nail body 1 is provided with screw thread 2, nail body 1 upper end is fixedly connected with spheroid 3, elastic locking piece 4 middle parts offer the spherical cavity 5 with spheroid 3 corresponding cooperations, spheroid 3 is embedded in spherical cavity 5, be positioned on the spherical cavity 5 lateral elastic locking pieces 4 and evenly offer six notches 6, the centre of universal base 7 bottoms offers hollow cavity 8, elastic locking piece 4 is embedded in hollow cavity 8 by the bulge loop 9 of its following side, the top of universal base 7 offers the open slot 11 that is used to be provided with synthetism rod 10, the universal base 7 on synthetism rod 10 tops is provided with the universal base locking device, and this universal base locking device adopts nut 13 to be fastened on the outside of universal base 7 upper opening grooves 11, and the top of spheroid 3 offers fastener hole 12.

This synthetism nail is when clinical installing and using, elastic locking piece 4 can be embedded in the hollow cavity 8 from universal base 7 bottoms, elastic locking piece 4 is stuck in the hollow cavity 8 by the bulge loop 9 in its outside, the spheroid 3 of nail body 1 end embeds in the spherical cavity 5 of elastic locking piece 4, follows closely body 1 this moment and can do to rotate at any angle in elastic locking piece 4 to regulate along with the spheroid 3 of its end; Use specific purpose tool to insert fastener hole 12, nail body 1 can be screwed in the bone; By regulating the universal base 7 of nail body 1 end, synthetism rod 10 can be inserted easily in the open slot 11 of each universal base 7, at last by the nut 13 in the universal base locking device, just the nail body 1 of synthetism nail can be fixedly mounted on the synthetism apparatus.

Another kind of synthetism nail shown in Fig. 5,6,7 and 8, its basic structure and the above embodiments are similar, difference is: nail body 1 and elastic locking piece 4 are the top embedding by universal base 7 when mounted, in addition, its universal base locking device adopts nut 13 and internal lock support pin 14 to be fastened on the outside and inboard of universal base 7 upper opening grooves 11 simultaneously, and this locking device is more safe and reliable.

In this utility model, described universal base locking device also can adopt internal lock support pin 14 to be fastened on the inboard of universal base 7 upper opening grooves 11.But this locking mode reliability is reported the accomplishment of a task or termination of a mission.

Claims

1, a kind of synthetism nail, comprise nail body [1], the surface of nail body [1] is provided with screw thread [2], it is characterized in that: described nail body [1] upper end is set with a spheroid [3], elastic locking piece [4] middle part offers the spherical cavity [5] with the corresponding cooperation of spheroid [3], spheroid [3] is embedded in spherical cavity [5], be positioned at and offer some notches [6] on the lateral elastic locking piece of spherical cavity [5] [4], the centre of universal base [7] bottom offers hollow cavity [8], elastic locking piece [4] is embedded in hollow cavity [8] by the bulge loop [9] of its following side, the top of universal base [7] offers the open slot [11] that is used to be provided with synthetism rod [10], and the universal base [7] on synthetism rod [10] top is provided with the universal base locking device.

2, a kind of synthetism nail according to claim 1, it is characterized in that: the top of described spheroid [3] offers fastener hole [12].

3, a kind of synthetism nail according to claim 1 and 2, it is characterized in that: described universal base locking device adopts nut [13] to be fastened on the outside of universal base [7] upper opening groove [11].

4, a kind of synthetism nail according to claim 1 and 2, it is characterized in that: described universal base locking device adopts internal lock support pin [14] to be fastened on the inboard of universal base [7] upper opening groove [11].

5, a kind of synthetism nail according to claim 1 and 2 is characterized in that: described universal base locking device adopts nut [13] and internal lock support pin [14] to be fastened on the outside of universal base [7] upper opening groove [11] simultaneously with inboard.