CN211658307U

CN211658307U - External fixing frame tensioning adjusting mechanism for fracture

Info

Publication number: CN211658307U
Application number: CN201921658868.5U
Authority: CN
Inventors: 陈聚伍
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-10-13
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a tensioning and adjusting mechanism for an external fixing frame of fracture, which comprises an anatomical bar and a Y-shaped radial fixing nail, wherein an inner thread is vertically arranged on the inner wall of the center of a Y-shaped fork head, an outer thread is arranged on the outer wall of a locking pin, and the inner thread is connected with the outer thread; the lower part of the locking pin and the Y-shaped fork head form an installation space in a surrounding mode, a lower thread arc surface is arranged at the bottom of the installation space, the dissecting rod is a threaded rod, the dissecting rod is sleeved in the installation space, the thread of the dissecting rod is connected with the lower thread arc surface, and the bottom of the locking pin is supported on the upper side of the dissecting rod; meanwhile, the outer end part of the rod of the dissecting rod is in threaded connection with a jacking adjusting nut, and the jacking adjusting nut is supported on the side surface of the Y-shaped fork head of the adjacent fixing nail. The utility model discloses can be through adjusting the roof pressure adjusting nut of outer tip of pole, make the staple that is located the fracture both sides can inwards extrude the butt joint inseparably, this kind of regulative mode is simple and effective. Only the corresponding locking nail needs to be loosened and locked in the adjusting process.

Description

External fixing frame tensioning adjusting mechanism for fracture

Technical Field

The utility model belongs to the technical field of the fracture locating rack, concretely relates to taut adjustment mechanism of external mount of fracture.

Background

The outer frame is fixed to be the fracture fixed mode commonly used, the fixed nail of beating into to the fracture both sides vertical is adopted mostly in current outer frame is fixed, then constitute the mount through a plurality of universal joints and connecting rod interconnect, because the universal joint need have horizontal rotation and lock and die and vertical rotation and lock dead regulation relation, universal wheel volume is great, whole outer frame is bulky, it is inconvenient to carry after the fracture patient installs and uses, the fracture position can't wear the clothes of changing, influence is involved in external activities, for this reason, the patent document who discloses CN 209437350U provides an easy and simple to handle, convenient to carry and the fracture fixed outer frame that is accepted by the patient easily. However, when the fracture fixation outer frame is used for tensioning two adjacent fixation nails on two sides of a fracture in the operation process, the corresponding locking pin needs to be loosened, and then other auxiliary clamping tools are usually needed, so that an additional auxiliary tool needs to be equipped, the operation is generally completed by two persons in a matched mode, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem and not enough that the external fixing device of fracture that the publication is CN 209437350U still exists, provide the taut adjustment mechanism of external mount of fracture of being convenient for operation more to reach the high-efficient characteristics that just adjust the precision height of easy operation, and need not increase extra appurtenance and can realize one-man operation.

The technical scheme adopted for realizing the purpose is as follows: a tensioning and adjusting mechanism for an external fixing frame for fracture comprises a dissecting rod and Y-shaped radial fixing nails, wherein each Y-shaped radial fixing nail is vertically fixed on a bone layer on two sides of a fracture position, a Y-shaped fork head is arranged at the upper end of each Y-shaped radial fixing nail, the middle part of each Y-shaped radial fixing nail is provided with a polished rod section, and the lower end of each Y-shaped radial fixing nail is provided with a screw rod section; an internal thread is vertically arranged on the inner wall of the center of the Y-shaped fork head, an external thread is arranged on the outer wall of the locking pin, and the internal thread is connected with the external thread; the lower part of the locking pin and the Y-shaped fork head form an installation space in a surrounding mode, a lower thread arc surface is arranged at the bottom of the installation space, the dissecting rod is a threaded rod, the dissecting rod is sleeved in the installation space, the thread of the dissecting rod is connected with the lower thread arc surface, and the bottom of the locking pin is supported on the upper side of the dissecting rod; meanwhile, the outer end part of the rod of the dissecting rod is in threaded connection with a jacking adjusting nut, and the jacking adjusting nut is supported on the side surface of the Y-shaped fork head of the adjacent fixing nail.

Furthermore, an anti-rotation sleeve head is arranged at the tail end outside the dissecting rod, and an end restraining sleeve is sleeved on the anti-rotation sleeve head in a matching mode and used for preventing the dissecting rod from rotating.

In addition, still simultaneously be located installation space upper portion cover and be equipped with the external member that compresses tightly, compress tightly the downside of external member and for concave cambered surface and set up screw thread formation screw thread upper arc face, dissect the pole suit and dissect the threaded connection of pole and screw thread lower arc face in this installation space, the bottom sprag of fitting pin is in the upside that compresses tightly the external member. The lower side of the upper cambered surface of the thread is not in contact with the upper side of the lower cambered surface of the thread, and a fit clearance exists between the upper cambered surface of the thread and the lower cambered surface of the thread.

Wherein, the dissecting rod is a full thread screw rod, or a half thread screw rod (only half or more than half of the screw rod is provided with threads).

The dissecting rod is an arc-shaped rod which is consistent with the bending direction of the fracture part, the model positioning rod is an arc-shaped rod which is consistent with the bending direction of the fracture part in the area between the Y-shaped radial fixing nails, and the positioning sleeve comprises a transverse pipe and a vertical guide pipe which is vertically connected with the tail end of the transverse pipe.

The inner wall of the transverse pipe of the positioning sleeve is a cylindrical hole or an inner edge hole, and the transverse pipe is installed in a matching mode with the end portion of each model positioning rod. The inner wall of the transverse pipe of the positioning sleeve is a cylindrical hole, an inner sleeve is sleeved in the cylindrical hole, and a locking screw is connected between the transverse pipe and the inner sleeve; the inner wall of the inner sleeve is provided with an anti-rotation stop table which is parallel along the axial direction.

In order to improve the stability of the whole device, an anti-skid layer can be arranged on the outer surface of the dissecting rod, for example, a protective line structure is adopted, or the anti-skid layer is pasted.

The bottom of the installation space of the Y-shaped fork head is an arc-shaped bottom surface, the side surface of the dissecting rod is matched and attached to the arc-shaped bottom surface, the dissecting rod and the arc-shaped bottom surface are kept in surface contact, the stability of the dissecting rod can be guaranteed through the surface contact, and the dissecting rod cannot rotate or swing.

The utility model discloses following beneficial effect has: the utility model discloses on CN 209437350U's external fixing device scheme basis of fracture, can be through adjusting the roof pressure adjusting nut of outer tip of pole, the staple that makes to be located the fracture both sides can be inseparable to inside (or outside) extrusion butt joint, and this kind of regulative mode is simple and effective. Only the corresponding locking nail needs to be loosened and locked in the adjusting process. The end restraining sleeve can also be matched for restraining the dissecting rod and preventing the dissecting rod from rotating.

The utility model discloses simple structure can reduce as far as possible and cause the traumatic nature that forms to the patient because of the operation, can alleviate the volume and the weight of patient rehabilitation period outer support, improves patient rehabilitation period action flexibility, alleviates the outer support to the oppressive of fracture position, does benefit to the recovery. The utility model discloses location easy operation only needs to study through simple training and can accomplish the operation, simplifies the operation work load, reduces the operation cost. The utility model discloses simple structure is practical, and low in manufacturing cost reduces medical cost. Fewer structural components provide convenience for sterilization and maintenance processes. Not only is the installation easy, but also the removal is easy.

Drawings

Fig. 1 is a schematic view of the adjusting state of the present invention.

Fig. 2 is an enlarged schematic view of the staple of fig. 1.

Fig. 3 is a partial cross-sectional structural view of fig. 2.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic view of the removal of the locking pin of fig. 4.

Fig. 6 is a left side assembly view of fig. 2.

Fig. 7 is a schematic view of the partial cross-sectional structure of fig. 6.

Fig. 8 is a schematic view of another assembly structure of the present invention.

Fig. 9 is a schematic view of the partial cross-sectional structure of fig. 8.

Fig. 10 is a schematic view of the usage state of the present invention.

Fig. 11 is a schematic cross-sectional view of the usage state of the present invention.

Reference numbers in the figures: 1 is the dissecting rod, 11 is the outer tip of pole, 12 is for preventing changeing the pullover, 13 is the non-thread plane, 2 is the radial staple of Y type, 2a is the left end staple, for the right-hand member staple, 21 is Y type jaw, 22 is the fitting pin, 23 is the external screw thread, 24 is installation space, 25 is the screw thread cambered surface down, 26 is the polished rod section, 27 is the screw rod section, 31 is for compressing tightly the external member, 32 is the cambered surface on the screw thread, 41 is roof pressure adjusting nut, 42 is the tip restraint cover, 5 is the muscle layer, 6 is the bone substance layer.

Detailed Description

Example 1: and a tensioning and adjusting mechanism of an external fracture fixing frame based on the CN 209437350U external fracture fixing device scheme is adopted, as shown in figure 1, the tensioning and adjusting mechanism comprises a dissecting rod 1 and a plurality of Y-shaped radial fixing nails 2. Wherein, each Y-shaped radial fixing nail 2 is vertically fixed on the bone layers 6 at two sides of the fracture position, the dissecting rod 1 is an arc-shaped rod which is consistent with the bending direction of the fracture position, and the dissecting rod 1 is fixed at the tail end of each Y-shaped radial fixing nail 2 to form a fixed whole. Because the dissecting rod 1 has the same curvature with the fracture part, the dissecting rod 1 can be kept approximately parallel to the fracture part, so that the dissecting rod 1 can be used for connecting and reinforcing the two sides of the fracture, and the stable butt joint of the fracture part is ensured.

As shown in fig. 2-7, each Y-shaped radial staple 2 is provided with a Y-shaped prong 21 at its upper end, a polished rod section 26 at its middle portion, and a screw section 27 at its lower end. The screw section 27 has self-tapping on its surface, and the screw section 27 of the Y-shaped radial staple 2 is screwed into the bony layer 6, so that the smooth rod section 26 is located in the muscle layer 5. It can be seen that the external fixing frame of the utility model basically does not need to peel off the skin and flesh layer when being installed, or cuts the local muscle according to the operation requirement of the fracture condition so as to facilitate the operation. The Y-shaped radial fixing nail 2 can enter the bone layer 6 along the outer side of the muscle layer 5 to be fixed through rotating inwards, so that the injury to the fracture patient is very small, and the quick rehabilitation of the patient is facilitated.

As shown in fig. 3 and 7, a locking pin 22 is installed at the center of the Y-shaped fork 21, wherein an inner wall of the Y-shaped fork 21 is provided with an inner thread 23, an outer wall of the locking pin 22 is provided with an outer thread 23, and the inner thread 23 is connected with the outer thread 23. The lower part of the locking pin 22 and the Y-shaped fork 21 enclose an installation space 24, as shown in fig. 6, a lower arc surface 25 of the thread is arranged at the bottom of the installation space 24, the dissecting rod 1 is a full-thread rod in this embodiment, the dissecting rod is sleeved in the installation space, the thread of the dissecting rod is connected to the lower arc surface of the thread, and the bottom of the locking pin is supported on the upper side of the dissecting rod.

As shown in fig. 1, a jacking adjusting nut is further required to be connected to the outer end of the dissecting rod in a threaded manner, and the jacking adjusting nut is supported on the side surface of the Y-shaped fork head of the adjacent fixing nail. The operation process is as the sequence in fig. 1, namely, the locking nail of the left fixing nail 2a is loosened firstly, and the fixing nail on the right side is not loosened because of the locking nail, so that the fixing nail on the right side can compress the dissecting rod, and the dissecting rod cannot rotate. Then the jacking adjusting nut 41 is rotated to rotate on the dissecting rod 1, and the left end fixing nail 2a which is contacted with the dissecting rod is pushed rightwards, so that the distance between the left end fixing nail 2a and the right end fixing nail is compressed, and the fracture butt joint gap is tightly extruded. Wherein the left end fixing nail 2a and the right end fixing nail are respectively the fixing nails positioned at two sides of the fracture butt joint gap.

The dissector bar 1 is the fixation means eventually used to fixedly attach each Y-shaped radial fixation nail 2, as shown in fig. 10 and 11. However, when installing the Y-shaped radial fixing pins 2, the position of each Y-shaped radial fixing pin 2 needs to be determined. The first nail is drilled relatively freely, and a doctor can drill the first nail on the bone layer 6 on one side close to the fracture position according to experience. After the first fixing nail is installed, the installation of the other fixing nails needs to have the requirement of position range. A plurality of model positioning rods and a fixing sleeve are required to be matched for positioning and installation.

The dissecting rod 1 is an arc rod which is consistent with the bending direction of the fracture part, and the model positioning rods are also consistent with the bending direction of the fracture part in the area between the Y-shaped radial fixing nails 2. After the first fixing nail is installed, the installation sequence of other fixing nails is not limited, the installation sequence from fig. 6 to fig. 10 is that the first fixing nail, the fourth fixing nail, the third fixing nail and the second fixing nail (the first fixing nail to the fourth fixing nail are all Y-shaped radial fixing nails), and the corresponding model positioning rods have the sequence of a first model positioning rod 31 with the length between the first fixing nail and the fourth fixing nail, a second model positioning rod 32 with the length between the first fixing nail and the third model positioning rod with the length between the first fixing nail and the second fixing nail. Of course, there may be other fixing nail mounting orders, such as the first fixing nail, the second fixing nail, the third fixing nail and the fourth fixing nail, and the length of each corresponding model positioning rod changes at this time, and is the model positioning rod four with the length between the first and second fixing nails, and the model positioning rod five with the length between the second and third fixing nails, and the model positioning rod six with the length between the third and fourth fixing nails. Or other sequences and other lengths of model-locating rod combinations, not described in detail.

As shown in fig. 7, in this embodiment, when the fourth staple is installed, a first model locating rod 31 is needed. The model positioning rod I31 is an arc-shaped rod which keeps the same bending direction with the fracture part in the area between the first fixing nail and the fourth fixing nail. As shown in fig. 8, the second model positioning rod 32 is an arc-shaped rod which keeps the bending direction of the fracture part in the area between the first fixing nail and the third fixing nail consistent. As shown in fig. 9, the model positioning rod iii is an arc-shaped rod that keeps the bending direction of the fracture part in the region between the first fixing nail and the second fixing nail consistent.

The positioning sleeve 4 shown in fig. 11 comprises a transverse pipe 41 and a vertical guide pipe 42 vertically connected with the tail end of the transverse pipe 41, the inner wall of the transverse pipe 41 of the positioning sleeve 4 is an inner edge hole 43, and the tail end of each model positioning rod is prism-shaped, so that the transverse pipe 41 and the end part of each model positioning rod can be maintained to be matched and installed. The first model positioning rod 31 is installed in the installation space 24 of the first fixing nail, and the first model positioning rod 31 is fixed by the locking pin 22. The first model positioning rod 31 is preferably provided with a scale to facilitate quick determination of the position of the first fixing pin. When the model positioning rod one 31 is fixed, the position of the positioning sleeve 4 mounted at the tail end of the model positioning rod one is also determined, namely the drilling position of the fourth fixing nail is also determined.

As shown in fig. 8, when the fourth staple is identified, the same method is used to identify the third staple. As shown in fig. 9, when the third staple is identified, the same method is used to identify the second staple.

As shown in fig. 10, after the fixing nails are all installed, the dissecting rod 1 is installed, and the dissecting rod 1 is fixed through the locking pins 22, so that the dissecting rod 1 and the fixing nails are connected into a whole, and the outer surface of the dissecting rod 1 is provided with the anti-skid layer, thereby increasing the stability of the whole structure.

The embodiment is an improvement on the basis of the scheme of the external fracture fixing device of CN 209437350U, the patent document can realize adjustment and fixation, but when the final tensioning step is adjusted, as the butt joint tensioning force is needed to be larger and the precision requirement is high, the step is a time-consuming and labor-consuming process, and the operation time is increased, but after the tensioning adjustment structure is adopted, the tensioning and butt joint of gaps at two sides of the fracture can be realized through simple operation, the improved structure is simple, the wound on a fracture patient is small, the installation is easy, and the detachment is easy.

Example 2: on the basis of the embodiment 1, the tail end of the rod outside the dissecting rod is further provided with an anti-rotation sleeve head, and an end part restraining sleeve is sleeved on the anti-rotation sleeve head in a matching mode and used for preventing the dissecting rod from rotating. This solution, as shown in figure 1, is used to prevent the locking nail of the right staple from not completely pressing against the dissecting bar or possibly rotating.

Example 3: in addition to the embodiment 1, a pressing sleeve is sleeved on the upper part of the installation space, and as shown in fig. 8 and 9, the lower side surface of the pressing sleeve is a concave arc surface and is provided with a thread to form a thread upper arc surface. The dissecting rod is sleeved in the mounting space, the thread of the dissecting rod is connected with the upper arc surface of the thread and the lower arc surface of the thread, and the bottom of the locking pin is supported on the upper side of the pressing sleeve. The lower side of the upper cambered surface of the thread is not in contact with the upper side of the lower cambered surface of the thread, and a fit clearance exists between the upper cambered surface of the thread and the lower cambered surface of the thread.

Example 4: on the basis of any of the embodiments 1-3, the dissecting rod is modified from a full-thread screw into a half-thread screw, i.e. only half or more than half of the screw is provided with threads, such as the non-thread plane 13 in fig. 8, and the design can be that the locking nail in the fixing nail is pressed on the side of the non-thread plane 13 of the dissecting rod, so as to prevent the dissecting rod from rotating.

Claims

1. A tensioning and adjusting mechanism for an external fracture fixing frame comprises a dissecting rod and Y-shaped radial fixing nails, wherein a Y-shaped fork head is arranged at the upper end of each Y-shaped radial fixing nail, a polished rod section is arranged in the middle of each Y-shaped radial fixing nail, and a screw rod section is arranged at the lower end of each Y-shaped radial fixing nail; an internal thread is vertically arranged on the inner wall of the center of the Y-shaped fork head, an external thread is arranged on the outer wall of the locking pin, and the internal thread is connected with the external thread; the lower part of the locking pin and the Y-shaped fork head form an installation space in a surrounding mode, and the dissecting rod is a threaded rod, a lower thread cambered surface is arranged at the bottom of the installation space, the dissecting rod is sleeved in the installation space, and the thread of the dissecting rod is connected to the lower thread cambered surface; meanwhile, the outer end part of the rod of the dissecting rod is in threaded connection with a jacking adjusting nut, and the jacking adjusting nut is supported on the side surface of the Y-shaped fork head of the adjacent fixing nail.

2. The tension adjusting mechanism of an external bone fracture fixation frame as claimed in claim 1, wherein an anti-rotation sleeve head is provided at the outer end of the rod of the dissecting rod, and an end restraining sleeve is sleeved on the anti-rotation sleeve head to prevent the dissecting rod from rotating.

3. The tension adjusting mechanism of an external fixation frame for bone fracture as claimed in claim 1, wherein a compression sleeve is sleeved on the upper portion of the installation space, the lower side surface of the compression sleeve is a concave arc surface and is provided with threads to form an upper arc surface of the threads, the dissecting rod is sleeved in the installation space and is connected with the upper arc surface of the threads and a lower arc surface of the threads through the threads of the dissecting rod, and the bottom of the locking pin is supported on the upper side of the compression sleeve.

4. The tension adjusting mechanism of an external fixation frame for bone fracture as claimed in claim 3, wherein the lower side of the upper arc surface of the screw thread is not in contact with the upper side of the lower arc surface of the screw thread, and a fit clearance exists between the two.

5. The tension adjusting mechanism of external fixation frame for bone fracture as claimed in claim 1, wherein the dissecting rod is a full-thread screw or a half-thread screw.