阅读说明：本技术 一种骨科取钉器 (Nail extractor for orthopedics department ) 是由 余秀芳 于 2019-11-28 设计创作，主要内容包括：本发明属于骨科手术器具设备领域,具体涉及一种骨科取钉器,包括支撑架,所述支撑架底部设置多个支脚,所述支撑架内设有竖直设置的柱型空槽,柱型空槽内螺接调节筒,所述调节筒的中间通槽内螺接调节杆,所述调节杆顶部连接旋转件,所述调节杆底部连接向外弯曲设置的弹性夹脚,所述夹脚底部设有夹头；所述调节杆外位于调节筒上方的位置螺接卡位件。本发明相比现有技术具有以下优点：整个装置结构简单合理,利用带支脚的支撑架能够使取钉器相对稳定的顶在对应位置,通过调节杆、调节筒、卡位件的相互配合,能稳定快速的将骨钉旋出,避免施力过大或用力不均匀造成伤口扩大,在旋出过程中使取钉器保持稳定,使用方法简单,适于推广。(The invention belongs to the field of orthopedic surgical instrument equipment, and particularly relates to an orthopedic nail extractor which comprises a support frame, wherein the bottom of the support frame is provided with a plurality of support legs, a vertically arranged columnar empty groove is arranged in the support frame, an adjusting cylinder is in threaded connection in the columnar empty groove, an adjusting rod is in threaded connection in a through groove in the middle of the adjusting cylinder, the top of the adjusting rod is connected with a rotating piece, the bottom of the adjusting rod is connected with an elastic clamping foot which is bent outwards, and a clamping head is arranged at the bottom of the clamping foot; the position of adjusting the pole outside being located a regulation section of thick bamboo top spiro union screens piece. Compared with the prior art, the invention has the following advantages: whole device simple structure is reasonable, utilizes the support frame of taking the stabilizer blade to make the top of getting the nail ware relatively stable correspond the position, through adjusting the pole, adjusting a section of thick bamboo, screens piece mutually support, can stabilize quick unscrew the bone nail, avoids the application of force too big or exert force inhomogeneous to cause the wound to enlarge, makes to get the nail ware and remain stable unscrewing the in-process, and application method is simple, is suitable for the popularization.)

1. The orthopedic nail extractor is characterized by comprising a support frame, wherein a plurality of support legs are arranged at the bottom of the support frame, a vertically arranged columnar empty groove is formed in the support frame, an internal thread I is arranged in the columnar empty groove, an adjusting cylinder is in threaded connection with the columnar empty groove, and an external thread I matched with the internal thread I is arranged on the outer wall of the adjusting cylinder;

a middle through groove is formed in the adjusting cylinder, an internal thread II is arranged on the inner wall of the middle through groove, an upper through groove with a radius larger than that of the middle through groove is arranged above the middle through groove, an internal thread III is arranged in the upper through groove, a lower through groove with a radius larger than that of the middle through groove is arranged below the middle through groove, and the inner wall of the lower through groove is a smooth wall surface; an adjusting rod is screwed in the through groove in the middle of the adjusting cylinder, an external thread II matched with the internal thread II is arranged on the outer wall of the adjusting rod, the top of the adjusting rod is connected with a rotating piece, the bottom of the adjusting rod is connected with an elastic clamping foot which is bent outwards, and a clamping head is arranged at the bottom of the clamping foot; a position, outside the adjusting rod, above the adjusting cylinder is in threaded connection with a clamping piece, the inner wall of the clamping piece is provided with an internal thread four matched with the external thread two, the lower end of the clamping piece is provided with a boss matched with the upper through groove, and the outer wall of the boss is provided with an external thread three matched with the internal thread three; the rotating piece is provided with a positioning through hole, the support frame is provided with a positioning concave hole with the same diameter as the positioning through hole, and the positioning pin penetrates through the positioning through hole and then is in threaded connection with the positioning concave hole.

2. The orthopedic nail extractor of claim 1, wherein the third internal thread and the third external thread are trapezoidal threads, and the remaining threads are triangular threads.

3. The orthopedic nail extractor as claimed in claim 1, wherein the bottom of the supporting leg is connected with a bottom pad, and the bottom pad is made of hard rubber.

4. The orthopedic nail extractor of claim 1, wherein the length of the lower through groove is not less than 2/3 of the length of the clamping foot.

5. The orthopedic nail extractor as claimed in claim 1, wherein the chuck is detachably mounted with respect to the clamping leg and is fixed at the bottom of the clamping leg by a screw and nut fit.

6. The orthopedic nail extractor as claimed in claim 1, wherein the inner side surface of the chuck is a cambered surface or a plane surface, and the inner side surface is uniformly provided with anti-slip teeth.

Technical Field

The invention belongs to the field of orthopedic surgery instrument equipment, and particularly relates to an orthopedic nail extractor.

Background

In an orthopedic surgery, the bone blocks at the fracture part are usually reset and fixed again through a steel plate and bone nails, so that the dislocated bone blocks are connected together tightly under the action of a steel plate screw system again, then the fractured bone blocks grow new callus after a long time of postoperative growth and are healed together again, the internal fixation is often required to be taken out within 1-2 years after the internal osteosynthesis so as to avoid rejection reaction and the like, wherein the bone nails comprise self-tapping screws (cancellous screws), non-self-tapping screws (cortical screws), tension screws (half-thread screws), hollow compression screws and the like, when the bone nails are taken out, as the bone density of part of patients is low, the bone nails are difficult to form threads on the bone, the bone nails cannot be screwed out continuously after being rotated to a certain part when the bone nails are taken out, the bone nails can only idle in place, and the powerful forceps have high destructiveness on the bone, thereby causing unnecessary pain to the patients, in order to solve the problems, the prior art already researches related to the nail extractor for the orthopedic surgery, but in practical application, the hand strength of nursing personnel in traditional Chinese medicine is not uniform, the taking speed and force can be influenced, and the wound of a patient is easy to expand or deteriorate; the existing clamping device still needs to be taken out in a spiral mode when a screw is taken out, but the structure of the nail extractor comprises a plurality of directions of threads for adjusting the position and the position of a chuck, so that the hidden danger that the chuck is unstably clamped or the whole device is loosened can be caused by spirally rotating the nail extractor in the taking-out process, and the nail extractor for the orthopedic surgery needs to be further researched and improved.

Disclosure of Invention

The invention aims to provide an orthopedic nail extractor aiming at the problem that the clamping head of the existing nail extractor is unstable or the screwed part is loosened in the screw extraction process.

The invention is realized by the following technical scheme: the orthopedic nail extractor comprises a support frame, wherein a plurality of support legs are arranged at the bottom of the support frame and used for supporting the whole support frame, and meanwhile, a medical worker can apply force uniformly and conveniently;

a middle through groove is formed in the adjusting cylinder, an internal thread II is arranged on the inner wall of the middle through groove, an upper through groove with a radius larger than that of the middle through groove is arranged above the middle through groove, an internal thread III is arranged in the upper through groove, a lower through groove with a radius larger than that of the middle through groove is arranged below the middle through groove, and the inner wall of the lower through groove is a smooth wall surface; an adjusting rod is screwed in the through groove in the middle of the adjusting cylinder, an external thread II matched with the internal thread II is arranged on the outer wall of the adjusting rod, the top of the adjusting rod is connected with a rotating piece, the bottom of the adjusting rod is connected with an elastic clamping foot which is bent outwards, and a clamping head is arranged at the bottom of the clamping foot; a position, outside the adjusting rod, above the adjusting cylinder is in threaded connection with a clamping piece, the inner wall of the clamping piece is provided with an internal thread four matched with the external thread two, the lower end of the clamping piece is provided with a boss matched with the upper through groove, and the outer wall of the boss is provided with an external thread three matched with the internal thread three; the rotating piece is provided with a positioning through hole, the support frame is provided with a positioning concave hole with the same diameter as the positioning through hole, and the positioning pin penetrates through the positioning through hole and then is screwed in the positioning concave hole;

through the screw-thread fit of screens piece and regulation section of thick bamboo, can effectively avoid adjusting a section of thick bamboo when rotating to adjust a section of thick bamboo and extract the bone nail not hard up for adjusting the pole, and then effectively guarantee that the rotatory nail process of pulling out is stable effectual going on.

Furthermore, the third internal thread and the third external thread are trapezoidal threads, the rest threads are triangular threads, and the rectangular threads can generate relatively large friction force compared with the triangular threads, so that the stability of the adjusting cylinder relative to the adjusting rod is further improved.

Further, the bottom pad is connected to the stabilizer blade bottom, the bottom pad material is hard rubber, and the stable antiskid effect is played when hard rubber bottom pad can play the supporting role.

Furthermore, the length of the lower through groove is not less than 2/3 of the length of the clamping foot, and the lower through groove can control the distance between the clamping heads due to the up-and-down movement of the adjusting cylinder, so that the effect of clamping and fixing the bone screw cap can be achieved.

Furthermore, the chuck is detachable installation for pressing from both sides the foot, is fixed in the clamping foot bottom through screw rod and nut cooperation, can conveniently change the chuck of wearing and tearing or different specifications to the bone screw cap of adaptation different specifications.

Furthermore, the inner side surface of the chuck is an arc surface or a plane, and the inner side surface is uniformly provided with anti-skidding clamping teeth, so that the bone screw cap can adapt to bone screw caps with different shapes or sizes.

The above components are mainly made of rustproof stainless steel materials except for special descriptions.

Positioning hole and location shrinkage pool all are equipped with a plurality ofly, can realize adjusting the pole and can will adjust pole and support frame relatively fixed with the locating pin when the co-altitude.

Compared with the prior art, the invention has the following advantages: the whole device is simple and reasonable in structure, the support frame with the support legs can enable the nail extractor to be stably supported at a corresponding position, then the adjusting rod and the adjusting cylinder are respectively rotated to enable the clamping head to be located at a corresponding height, and then the adjusting rod and the support frame are fixed through the positioning pin; then through the rotatory regulation section of thick bamboo, make the regulation section of thick bamboo downstream, control the distance between the chuck under the effect of lower logical groove and clamp foot, realize the clamp tight to the bone nail cap, then rotatory screens piece, make boss part screw in go up logical inslot fixed, then extract the locating pin, rotate the rotating member and can make and fix still can stabilize quick unscrewing the bone nail under the condition that "the sclerotin can't form the screw thread", avoid applying force too big or exert force inhomogeneous and cause the wound to enlarge, make nail extractor keep stable in the process of unscrewing, simple to use method is suitable for the popularization.

Drawings

FIG. 1 is a cross-sectional view of a staple remover.

Fig. 2 is a cross-sectional view of the support stand.

Fig. 3 is a sectional view of the detent.

Fig. 4 is an upper partial cross-sectional view of the adjustment barrel.

FIG. 5 is a top view of the inner surface of the collet being cambered.

Figure 6 is a top view of the inside surface of the cartridge in plan.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.