CN113576644A

CN113576644A - Axial tensioning clamp for fixing fracture without binding

Info

Publication number: CN113576644A
Application number: CN202110880034.4A
Authority: CN
Inventors: 史欣
Original assignee: Zhengzhou Qinruiheng Electronic Technology Co ltd
Current assignee: Zhengzhou Qinruiheng Electronic Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-11-02

Abstract

The invention discloses a binding-free fixing axial tensioning clamp for fracture, which comprises a front tensioning fork rod connected with a traction part of a binding-free fixing piece and a rear tensioning fork rod connected with a fixing part, wherein a pulling force or a tension mechanism which enables the front tensioning fork rod and the rear tensioning fork rod to be inwards applied between the front tensioning fork rod and the rear tensioning fork rod is added, so that the traction part of the binding-free fixing piece is outwards pulled and is in a tensioning state. And an expansion and contraction mechanism is arranged between the left fork rod and the right fork rod of the front tension fork rod or the rear tension fork rod. The invention provides a quick fixing tensioning clamp capable of fixing a flat binding-free fixing piece, which has the advantages of obviously simplifying operation procedures, improving operation efficiency, reducing operation difficulty and the like. The tool has a self-holding function, can be independently supported after tension is generated in use, is suitable for being operated by a single person to complete the operation processes of drilling, clamping, traction, fixing and the like, and has the advantages of simple and standardized operation, high efficiency and good effect.

Description

Axial tensioning clamp for fixing fracture without binding

Technical Field

The invention belongs to the technical field of fracture reduction fixing tools, and particularly relates to a tool for performing bundling-free flexible fixing part traction fixing on a fracture part.

Background

Common surgical treatment methods for fixing fractures of femoral shafts and the like include steel plate fixing and intramedullary nail fixing, the steel plate fixing has the advantages of simple operation, short learning period, large wound, high accidental injury probability, more required matching models, infection, non-healing, delayed healing, nail and plate fracture sometimes, large postoperative scar, beautiful influence and non-compliance with the minimally invasive principle. The intramedullary nail adopts a closed and minimally invasive technology, the locked intramedullary nail can prevent the rotational deformity of the fracture, reduce the risk of the fracture of the built-in object, reduce the infection rate of the operation, promote the high healing rate of the fracture, avoid the stress shielding effect by central fixation and have low incidence rate of the re-fracture. The intramedullary nail mode accords with the minimally invasive principle, is the current development direction, but is difficult to operate and learn, the intramedullary nail distal end is difficult to lock, the reduction part is closed and limited incision is performed, but the intramedullary nail distal end is not anatomically reduced, the healing is delayed, and the pressure of a patient is higher. Complications such as abnormal healing and poor lower limb force lines may occur after surgery. Because the intramedullary nail is in a linear type fixing mode, the intramedullary nail fixing mode cannot be well solved aiming at special bones with large curvature, such as clavicle, radius and the like. Moreover, the problem of bone resorption exists in the recovery period after the butt joint of the fractured bones, which affects the normal recovery.

Another operation method for bone fracture of diaphysis part is to vertically thread nails at both sides of the fracture part, wherein the two nails have four exposed ends, the surgeon repeatedly winds each nail head in a 8-shaped mode through a cord to connect and bind the two nails and the fracture area to form a firm binding relationship, and finally, the rope head is tied, disinfected and sewn. The operation mode avoids the trouble of adopting steel plate fixation and intramedullary nail fixation, but the operation process needs a doctor to repeatedly wind the thread ropes, the efficiency is lower, the wound thread ropes are repeatedly overlapped to form obvious bulges, particularly, the thread ropes are wound and piled at the nail head part to influence the muscle suture effect, the rope ends need to be tied with rope knots, finally, the protruded parts are formed after the muscle is sutured, the discomfort of a patient is strong, the blood circulation is influenced, and the rehabilitation effect is influenced.

The fracture binding-free fixing piece and the fixing band set provided by the prior art are the binding-free fixing band set which can be quickly fixed and applied to a fracture part, compared with the existing mode that ropes are bound by repeatedly winding ropes at the exposed ends of two through nails, the bulge parts are obviously reduced, the operation efficiency is improved, the operation difficulty is reduced, the blood circulation is improved so as to be beneficial to the rehabilitation of a patient, and the comfort of the patient is improved. Compared with the prior art that the steel plates are fixed, the problem of overlarge stress caused by the connection of the steel plates can be solved, and the anastomosis of the butt joint parts can be better realized. However, since such a free-bundling fracture fixation device and fixation band set need to be fixed in a tensioned state, a tensioning tool used in cooperation therewith is required.

Disclosure of Invention

The invention provides a fixing band tensioning clamp used in combination with a fracture binding-free fixing piece and a fixing band set, aiming at solving the problems that at the existing diaphysis fracture part, a rope is repeatedly wound on an exposed part of a through-nail and finally tied with a knot, so that the sewn muscle part protrudes, discomfort is brought and blood circulation is influenced.

The invention adopts the technical scheme that the axial tensioning clamp for the binding-free fixation of the fracture is adopted, the clamping clamp for the fixation belt comprises a front tensioning fork rod connected with a traction part of the binding-free fixation piece and a rear tensioning fork rod connected with a fixation part, and the traction part of the binding-free fixation piece is outwards pulled and is in a tensioning state by applying a pulling force or a tension mechanism between the front tensioning fork rod and the rear tensioning fork rod to enable the front tensioning fork rod and the rear tensioning fork rod to be inwards pulled.

And an expansion and contraction mechanism is further arranged between the left fork rod and the right fork rod of the front tension fork rod or the rear tension fork rod.

The collapsible mechanism has various forms, including at least the following forms. The first form: the expansion and contraction mechanism comprises a rectangular shell, the middle parts of the front end surface and the rear end surface of the shell are through to form an inner cavity, the left end wall and the right end wall of the inner cavity are respectively provided with a non-circular end hole, a hand wheel is sleeved in the inner cavity, the diameter of the head wheel is larger than the thickness between the front end surface and the rear end surface of the shell, so that two sides of the hand wheel are exposed out of the shell body for convenient operation, the cross rod sections of the two L-shaped rod pieces are distributed with thread sections, and the thread sections at both sides respectively penetrate into the corresponding end holes from the outer side of the shell to enter the inner cavity, the axle center of the hand wheel is provided with a screw hole, the thread sections of the two L-shaped rod pieces are respectively connected in the screw holes at both ends of the hand wheel in a threaded manner, the thread directions of the thread sections of the two L-shaped rod pieces are opposite, therefore, when the hand wheel is shifted, the L-shaped rod pieces on the two sides can be driven to be close to or far away from each other at the same time, the cross section of the thread section is matched with the non-circular end hole, and the lower end of the vertical rod of the L-shaped rod piece is provided with a clamping part connected with the traction part of the binding-free fixing piece. The second form: the expansion and contraction mechanism is a mechanism with two sides capable of independently adjusting expansion and contraction. The third form: the collapsible mechanism is a mechanism having an elastic collapsing function.

The clamping part is one or a plurality of combinations of column, T-shaped or hole type and the like.

The typical tensioning clamp is hinged to a pin shaft at the upper ends of a front tensioning fork rod and a rear tensioning fork rod, and handles extend upwards respectively. And a locking mechanism can be arranged at any position between the handle section or the front tension fork rod and the rear tension fork rod. One form of the locking mechanism comprises a screw rod hinged to the first handle, the screw rod penetrates through a flat through hole formed in the middle of the second handle, and a tightening knob is mounted on the screw rod at one end, located on the outer side of the second handle. An unfolding spring plate can be further arranged between the measuring handles.

And the tensioning component is a pair of parallel rods which are fixed on the front side of the rear tension fork rod and face the front tension fork rod, or a columnar rod which is vertically fixed on the inner sides of the two fork rods of the rear tension fork rod and faces to the opposite direction.

Each fork lever of the front tension fork lever or the rear tension fork lever is provided with a telescopic adjusting structure and a locking structure so as to realize length adjustment and enable the clamp body to be in the optimal operation position.

Has the advantages that:

1. the invention provides a quick fixing tensioning clamp capable of fixing a flat binding-free fixing piece, which has the advantages of obviously simplifying operation procedures, improving operation efficiency, reducing operation difficulty and the like.

2. The tool has a self-holding function, can be independently supported after tension is generated in use, is suitable for being operated by a single person to complete the operation processes of drilling, clamping, traction, fixing and the like, and has the advantages of simple and standardized operation, high efficiency and good effect.

3. After the expansion and contraction mechanism is additionally arranged on the front tension fork rod and/or the rear tension fork rod, the tensioning clamp is changed into a universal mode, can be expanded and retracted as required, and is further suitable for tensioning and fixing the binding-free fixing piece at backbone parts with different diameters. When the binding-free fixing piece is applied and wrapped on the diaphysis fracture part, the traction holes on the two sides are distributed on the two sides of the diaphysis and are approximately vertical to the two sides of the diaphysis, so that when the traction holes on the two sides of the diaphysis are pulled, the front tension fork rod is required to be adjusted to enable the fork rods on the two sides to respectively extend outwards for a certain width and then cross over the traction holes on the two sides, and then the hand wheel is adjusted to enable the fork rods on the two sides to contract inwards, so that the clamping components on the two sides are just inserted into the corresponding traction holes.

4. The tensioning parts arranged at the lower end of the rear tension fork rod are a pair of parallel rods which are fixed at the front side of the rear tension fork rod and face the front tension fork rod, so that the parallel rods can be clamped on the supporting rod to be prevented from falling off and provide reliable support no matter how the expansion degree or the contraction degree of the tensioning clamp is changed.

5. When the improved expansion and contraction mechanism of the embodiment 5 is adopted, the fork rod on any side of the front tension fork rod can be independently adjusted transversely outwards or inwards.

6. The embodiment can also adopt the fork rod structure with elastic contraction aiming at the front tension fork rod and/or the rear tension fork rod respectively, so that each fork rod can automatically and inwards tighten, and only the corresponding fork rod needs to be pulled open and aligned with the corresponding connecting part during use, thereby further simplifying the operation steps.

Drawings

Fig. 1 is a schematic view of an example of a tensioning clamp according to the invention in an applied state.

Fig. 2 is a front view of the tension clamp of fig. 1.

Fig. 3 is a left side view structural diagram of fig. 2.

Figure 4 is a schematic view of another example of a tensioning clamp according to the invention in use.

Fig. 5 is a front structural view of the tension clamp of fig. 4.

Fig. 6 is a left side view structural diagram of fig. 5.

Fig. 7 is a schematic view of an application state of another example of the tensioning clamp of the invention.

Fig. 8 is a perspective view of an expansion and contraction adjusting mechanism.

Fig. 9 is a front structural view of fig. 8.

Fig. 10 is an outer frame of the expansion and contraction adjustment mechanism of the pliers of fig. 1.

Fig. 11 is a structural view of an elastic expansion and contraction adjusting mechanism.

Fig. 12 is a sectional view taken along line a-a in fig. 11.

Fig. 13 is a sectional view of B-B in fig. 11.

Fig. 14 is a sectional view of fig. 11 taken along line C-C.

Fig. 15 is a structural view of another elastic expansion and contraction adjusting mechanism.

Fig. 16 is a sectional view of the structure of fig. 15 taken along line D-D.

Fig. 17 is a sectional view of E-E in fig. 15.

Reference numbers in the figures: the clamp comprises a handle 1, a pin shaft 2, a clamp head 3, a front tension fork rod 4, a rear tension fork rod 5, a locking mechanism 6, an unfolding elastic sheet 7, a clamping component 8, an expansion and contraction mechanism 9 and a tensioning component 10.

Detailed Description

Example 1: the binding-free fixing piece in the flat shape can be fixed on two sides of a fracture part by application, and after the binding-free fixing piece is tensioned and fixed, the far end and the near end of the fracture are fastened and fixed, so that the binding-free fixing piece has the advantages of obviously reducing the protrusion degree, improving the operation efficiency, reducing the operation difficulty, improving the blood circulation to be beneficial to the rehabilitation of a patient, improving the comfort of the patient and the like. In order to quickly fix the binding-free fixing piece, the main collars at the two ends of the binding-free fixing piece are respectively provided with pulling tension outwards along the axial direction. As shown in fig. 1, the flat-shaped binding-free fixing member 15 includes a pair of front collars 16 at the front end and a pair of rear collars 17 at the rear end, and when it is fixed, it is usual to drill a hole at the distal end of the fracture and fit the front collars 16 in holes at both sides of the hole and penetrate the fixing first insert rod 19, and drill a hole at the proximal end of the fracture and penetrate the fixing support rod 21, and when the forceps body shown in fig. 2 and 3 is applied to the binding-free fixing member 15, as shown in fig. 1, it is used in such a manner that a tensile force is applied between the support rod 21 and the pulling hole 18, and it is in a tensioned state. Then, holes are drilled into the diaphysis (proximal end of the fracture) by aligning holes at both ends of the rear collars 17, and then the second insertion rod 20 is inserted and fixed into the pair of rear collars 17.

As shown in figures 1-3, the upper ends of the front tension fork rod 4 and the rear tension fork rod 5 are hinged to the pin shaft 2, and the upper ends of the front tension fork rod 4 and the rear tension fork rod 5 are respectively extended upwards to form a handle 1 for facilitating operation. And a locking mechanism 6 is arranged at a proper position between the handle sections. The locking mechanism 6 comprises a screw 61, a pin shaft 62, a tightening knob 63 and a hinged seat 64, the pin shaft 62 is fixed on the first handle, the hinged seat 64 is hinged on the second handle, the screw 61 penetrates through a radial hole of the hinged seat 64, the inner end of the screw is hinged with the first handle through the pin shaft 62, a flat through hole is formed in the middle of the screw 61, and the tightening knob 63 is installed on the outer end screw of the screw 61. The tightening knob 63 is pushed to press the handles to move inward, so that the front tension fork rod 4 and the rear tension fork rod 5 move inward, i.e., the binding-free fixing member 15 moves toward the support rod 21.

In order to improve the practicability of the pliers body, an unfolding elastic sheet 7 is further additionally arranged between the two handles, as shown in fig. 7, the upper ends of the two unfolding elastic sheets 7 are respectively fixed at the inner sides of the two handles, and the lower ends of the two unfolding elastic sheets 7 are mutually pressed together at fixed pressure to generate outward elastic force.

As shown in figure 2, a clamping component 8 which is connected with the traction part of the binding-free fixing part is arranged at the lower end of the front tension fork rod 4. The clamping part 8 is T-shaped, namely the tail end is provided with an annular flange, and after the clamping part is sleeved with the traction hole 18, the annular flange is clamped on the wall of the traction hole and is not easy to fall off.

As shown in fig. 3, a tension member 10 is provided at the lower end of the rear tension yoke 5, and the tension member 10 is a pair of parallel bars fixed to the front side of the rear tension yoke 5 and facing the front tension yoke 4.

The tool has a self-holding function, can be independently supported after tension is generated in use, is suitable for being operated by a single person to complete the operation processes of drilling, clamping, traction, fixing and the like, and has the advantages of simple and standardized operation, high efficiency and good effect.

Example 2: the embodiment provides a universal pliers body, which is based on the embodiment 1, and an expansion and contraction mechanism 9 is arranged between the left fork rod and the right fork rod of the front tension fork rod 4 and/or the rear tension fork rod 5. Namely: the front tension yoke 4 and/or the rear tension yoke 5 include left and right yokes capable of sliding relative to each other, and an expansion and contraction mechanism 9 is provided between the left and right yokes.

As shown in fig. 2 and 10, the collapsible mechanism 9 in this embodiment includes a rectangular housing 91, and the front and rear end surfaces of the housing 91 are formed with an inner cavity 92 through the middle, and the left and right end walls of the inner cavity are provided with non-circular end holes 93, respectively. A hand wheel 94 is sleeved in the inner cavity 92, the diameter of the first wheel is larger than the thickness between the front end surface and the rear end surface of the shell, so that two sides of the hand wheel are exposed out of the shell for convenient operation. Threaded sections 95 are distributed on the cross rod sections of the two L-shaped rod pieces, and the threaded sections on the two sides penetrate into corresponding end holes 93 from the outer side of the shell 91 to enter the inner cavity 92 respectively. The axle center of the hand wheel 94 is provided with a screw hole, the thread sections 95 of the two L-shaped rod pieces are respectively in threaded connection with the screw holes at the two ends of the hand wheel, the thread directions of the thread sections of the two L-shaped rod pieces are opposite, so that the two L-shaped rod pieces at the two sides can be driven to be close to or away from each other simultaneously when the hand wheel 94 is stirred, the cross section of the thread sections is shaped like the non-circular end hole 93, and the lower end of the vertical rod of the L-shaped rod piece is provided with a clamping part 8 connected with the traction part of the binding-free fixing piece.

The front tension fork rod 4 and/or the rear tension fork rod 5 of the universal pliers body can be unfolded and retracted according to needs, and therefore the universal pliers body is suitable for tensioning and fixing the binding-free fixing piece at backbone parts with different diameters. As shown in fig. 1, after the binding-free fixing member is applied to wrap the fracture site of the diaphysis, the traction holes 18 on both sides are distributed on both sides of the diaphysis and are approximately vertical to each other, so that when the traction holes 18 on both sides of the diaphysis are pulled, the front tension fork rod 4 needs to be adjusted to respectively extend the fork rods on both sides outwards by a certain width and then cross the traction holes on both sides, and then the hand wheel 94 is adjusted to contract the fork rods on both sides inwards, so that the clamping members 8 (T-shaped or cylindrical) on both sides are just inserted into the corresponding traction holes 18.

As shown in fig. 10, the inner wall of the end hole 93 of the housing 91 has a flat surface, so that the end hole 93 is a non-circular hole, as shown in fig. 2, the flat surfaces 97 are milled on the threaded sections of the L-shaped rod members on both sides, so that after the threaded section 95 of each L-shaped rod member is connected to the axial screw hole of the hand wheel, the flat surface 97 on one side of the threaded section 95 is matched and attached to the flat surface in the end hole 93, so that when the hand wheel rotates, the two L-shaped rod members do not rotate, and can only move axially outwards or inwards. The end hole 93 is matched with the irregular section of the thread section 95, and further comprises key matching, edge matching and the like.

Example 3: a clamp body as shown in figures 4-6 has the same structure as the main body of the clamp body in embodiment 2, except that: (1) fixed vertically inside the two forks of the rear tension fork 5 and facing the opposite cylindrical bar 14. (2) Each of the front tension yoke 4 and/or the rear tension yoke 5 has a telescopic adjustment structure and a locking structure.

The columnar rods 14 in the other item (1) are applied by directly inserting the two columnar rods 14 at the lower end of the rear tension yoke 5 into the fracture proximal bore after drilling the fracture proximal bore, thereby eliminating the use of the support rods 21 as in example 1. It can be seen that this embodiment must be applied using the collapsible mechanism 9 as described in embodiment 2. When the device is used, the fork rods on two sides of the tension fork rod 5 are required to be adjusted firstly, then the fork rods on two sides of the tension fork rod 5 are expanded outwards by a certain width respectively and then cross the outer side of the near-end drilling hole of the fracture, and then the hand wheel 94 is adjusted to enable the fork rods on two sides to contract inwards, so that the columnar rods 14 on two sides are just inserted into the holes at two ends of the drilling hole.

The telescopic adjusting structure and the locking structure in the other part (2) are shown in fig. 4, and comprise an outer sleeve 11 and an inner sleeve rod 12 which are sleeved in a matching way, and a locking key or pin 13 is arranged at the overlapped part of the outer sleeve and the inner sleeve rod to realize the length adjustment so that the clamp body is in the optimal operation position.

Example 4: a pincer body similar to the embodiment 2 is shown in fig. 7, and is characterized in that the handle of the pincer body is in an arc structure, and the locking mechanism 6 is positioned close to the pin shaft part. The locking mechanism 6 comprises a screw rod 61 hinged to the first handle, the screw rod penetrates through a flat through hole formed in the middle of the second handle, and a tightening knob 63 is installed on the screw rod at one end of the outer side of the second handle.

Example 5: a clamp body improved with respect to the collapsible mechanism 9 in embodiment 2, in this embodiment, the collapsible mechanism shown in FIGS. 8 and 9 is used. Specifically, the expansion and contraction mechanism is of a fork-shaped structure integrally and comprises a connecting seat 901 connected with the lower end of the handle, a cross rod is fixed to the connecting seat 901, one end of the cross rod is provided with a left thread section 902, and the other end of the cross rod is provided with a right thread section 903. Simultaneously, the device also comprises two vertical rods 96, wherein the upper end of each vertical rod is fixed with a wheel frame 904, the middle part of the wheel frame is provided with a vertical wheel groove 905, and a corresponding hand wheel 906 is sleeved in the wheel groove in a matching way. The lateral surface of the wheel frame 904 is provided with a transverse through hole, the corresponding screw rod section penetrates through the corresponding through hole and is in threaded connection with a corresponding hand wheel, and the hand wheel can be stirred to drive the wheel seat to move inwards or outwards along the transverse direction. This embodiment not only has the adjustment function as described in embodiment 2, but also allows the fork arms on either side of the front tension fork 4 to be independently adjusted laterally outward or inward.

Example 6: a clamp body improved with respect to the collapsible mechanism 9 in embodiment 2, in this embodiment, the collapsible mechanism shown in FIGS. 11 to 14 is used. As can be seen from fig. 11, the left and right L-shaped forks respectively include a vertical bar 96 and a horizontal bar, the lower ends of the left and right L-shaped forks are respectively provided with a T-shaped retaining portion 8, and the upper horizontal bar 908 of the left L-shaped fork overlaps with the upper horizontal bar 909 of the right L-shaped fork. As can be seen from fig. 12 and 13, the cross-sections of the upper cross bar 908 and the upper cross bar 909 are semi-circular, so that the upper cross bar 908 and the upper cross bar 909 overlap to form an approximate circle as shown in fig. 14. In order to ensure that the upper cross bar 908 and the lower cross bar 909 can only expand or contract axially (transversely) after being overlapped, an end disc 911 is arranged at the right end of the upper cross bar 908, a semicircular through hole is formed in the end disc 911 and is matched and sleeved on the outer side of the upper cross bar 909, an end disc 910 is arranged at the left end of the upper cross bar 909, a semicircular through hole is formed in the end disc 910 and is matched and sleeved on the outer side of the upper cross bar 908, and the upper cross bar 908 and the upper cross bar 909 can only expand and contract axially after being sleeved.

And a shell 907 is further arranged on the outer side of the overlapped part, the middle part of the shell 907 is fixedly connected with the lower end of the handle through a connecting seat, and two ends of the shell 907 are respectively provided with a semicircular through hole for matching and sleeving a corresponding upper cross rod.

A thrust spring 904 is further connected between the right end disc 911 and the left end disc 910. Under the action of the thrust spring 904, the two side forks are naturally retracted inwardly. When in use, the left fork rod and the right fork rod are opened and clamped in the traction hole of the binding-free fixing piece. In order to smoothly open the two side forks outward, pull rods 921 are fixed at appropriate positions of the two side forks, respectively. Further, in order to make the overlapping portion of the left fork rod and the right fork rod always located in the middle of the housing 907, a left balance spring may be sleeved between the left end plate 910 and the left wall of the housing, and a right balance spring may be sleeved between the right end plate 911 and the right wall of the housing, respectively, and the elastic force of the balance springs at both sides is smaller than that of the thrust spring in the middle.

Example 7: a clamp body improved with respect to the collapsible mechanism 9 in embodiment 2, in this embodiment, the collapsible mechanism shown in FIGS. 15 to 17 is used. As can be seen from fig. 11, the left and right L-shaped forks respectively include a vertical bar 96 and a horizontal bar, the lower ends of the left and right L-shaped forks are respectively provided with a T-shaped retaining portion 8, and the upper horizontal bar 908 of the left L-shaped fork overlaps with the upper horizontal bar 909 of the right L-shaped fork. This example differs from example 6 in that: the cross-sectional shape of the upper crossbar 908 is not changed from the cross-sectional shape of the upper crossbar 909, and may be any cross-sectional shape.

In this embodiment, an outer sleeve 915 is fixed to the right end of the upper cross bar 908, and an inner sleeve 916 is fixed to the left end of the upper cross bar 909, and the two are matched and sleeved together. Meanwhile, the side wall of the outer sleeve 915 is uniformly provided with guide grooves 917 which are parallel along the axial direction, the left end of the inner sleeve 916 is uniformly provided with guide sliders 918, and each guide slider 918 is sleeved in a corresponding guide groove 917 in a matching manner and can slide along the axial direction. Each guide slider 918 extends out of the corresponding guide groove 917 by a certain height to serve as a movable spring seat, a fixed spring seat 919 is arranged on the outer edge of the right end of the outer sleeve 915, and a thrust spring 904 is sleeved between the movable spring seat and the fixed spring seat.

Further, an outer casing 907 is installed on the outer side of the overlapping portion, the middle of the outer casing 907 is fixedly connected with the lower end of the handle through a connecting seat 901, and semicircular through holes are respectively formed in two ends of the outer casing 907 and used for being matched with and sleeved on corresponding upper cross rods.

Under the action of the thrust spring 904, the two side forks are naturally retracted inwardly. When in use, the left fork rod and the right fork rod are opened and clamped in the traction hole of the binding-free fixing piece. In order to smoothly open the two side forks outward, pull rods 921 are fixed at appropriate positions of the two side forks, respectively. Further, in order to make the inner and outer casing portions always located in the middle of the housing 907, balance springs 920 may be respectively sleeved between the left end wall of the outer casing and the left wall of the housing, and between the right end wall of the inner casing and the right wall of the housing, and the elastic force of the balance springs at both sides is smaller than that of the thrust spring in the middle.

The foregoing detailed description of the invention is merely exemplary in nature and is not intended to limit the invention. Therefore, any modification, equivalent replacement or improvement can be made without departing from the spirit and scope of the present invention, for example, on the basis of embodiment 1 and fig. 1, a pair of pulling holes are respectively arranged on the outer sides of the two pairs of main collars at the two ends of the binding-free fastener, and when outward tension is simultaneously applied to the two pairs of pulling holes, the binding-free fastener wrapped around the fracture part can be in a tensioned state. For example, the pair of traction parts on one side of the binding-free fixing piece is designed to be in a T shape, and the joint part at the lower end of the front tension fork rod on the tensioning clamp is a hanging hole, so that the hanging and traction effects can be realized. For example, other pliers can be formed by changing the shape of the tensioning pliers or adding auxiliary components on the basis of maintaining the structural functions of the above embodiments, and other pliers comprise at least a front tensioning fork rod connected with the traction part of the binding-free fixing piece and a rear tensioning fork rod connected with the fixing part, and the traction part of the binding-free fixing piece is pulled outwards along the axial direction to be in a tensioning state by adding a pulling force or a tension mechanism between the front tensioning fork rod and the rear tensioning fork rod to enable the traction part of the binding-free fixing piece to be tensioned, so that the far and near ends of the fracture are tensioned. Or each fork rod of the front tension fork rod or the rear tension fork rod is provided with a telescopic adjusting structure and a locking structure so as to realize the design of adjusting the length to enable the clamp body to be in the optimal operation position and the like. The above should be included in the scope of the present invention.

Claims

1. The axial tensioning clamp for the bundling-free fixation of the fracture is characterized by comprising a front tension fork rod (4) connected with a traction part of a bundling-free fixing piece, and a rear tension fork rod (5) connected with a fixed part, wherein a pulling force or a tension mechanism which enables the front tension fork rod (4) and the rear tension fork rod (5) to be inwards applied is additionally arranged between the front tension fork rod and the rear tension fork rod, so that the traction part of the bundling-free fixing piece is outwards pulled along the axial direction to be in a tensioning state.

2. The non-binding fixation axial tension forceps for bone fracture according to claim 1, characterized in that a collapsible mechanism (9) is provided between the left and right fork arms of the front tension fork arm (4) or the rear tension fork arm (5).

3. The non-binding axial tension forceps for bone fracture fixation according to claim 2, wherein the expanding and contracting mechanism (9) comprises a rectangular casing (91), the middle parts of the front and rear end surfaces of the casing (91) are penetrated to form an inner cavity (92), the left and right end walls of the inner cavity are respectively provided with a non-circular end hole (93), a hand wheel (94) is sleeved in the inner cavity (92), the diameter of the first wheel is larger than the thickness between the front and rear end surfaces of the casing, so that the two sides of the hand wheel are exposed out of the casing to facilitate operation, thread sections (95) are distributed on the cross rod sections of the two L-shaped rod members, the thread sections on the two sides penetrate into corresponding end holes (93) from the outer side of the casing (91) to enter the inner cavity (92), a screw hole is arranged at the axle center of the hand wheel (94), the thread sections (95) of the two L-shaped rod members are respectively in threaded connection with the screw holes at the two ends of the hand wheel, the thread sections of the two L-shaped rod members have opposite directions, therefore, when the hand wheel (94) is shifted, the L-shaped rods on the two sides can be driven to be close to or away from each other at the same time, the cross section of the thread section is matched with the non-circular end hole (93), and the lower end of the vertical rod of the L-shaped rod is provided with a clamping part (8) connected with the traction part of the binding-free fixing part.

4. The binding-free fixed axial tension forceps for bone fracture according to claim 3, wherein the holding part (8) is cylindrical, T-shaped or hole-shaped.

5. The axial tension forceps for bone fracture binding-free fixation according to claim 1, wherein the upper ends of the front tension fork rod (4) and the rear tension fork rod (5) are hinged to the pin shaft (2) and respectively extend upwards to form a handle.

6. The non-binding fixation axial tension forceps for bone fracture according to claim 5, characterized in that a locking mechanism (6) is provided at any position between the handle section or front tension fork rod (4) and the rear tension fork rod (5).

7. The clamp-free fixed axial tension forceps for bone fracture according to claim 6, characterized in that the locking mechanism (6) comprises a screw rod (61) hinged to the first handle, the screw rod penetrates through a flat through hole arranged in the middle of the second handle, and a tightening knob (63) is arranged on the screw rod at one end outside the second handle.

8. The lashless fixation axial tension forceps for bone fractures according to claim 5, wherein a deployment spring (7) is mounted between the measuring handles.

9. The non-binding fixation axial tension forceps for bone fracture according to claim 1, characterized in that a tension member (10) is provided at the lower end of the rear tension fork (5), and the tension member (10) is a pair of parallel rods fixed to the front side of the rear tension fork (5) and facing the front tension fork (4), or a pair of cylindrical rods fixed perpendicularly to the inner sides of the two forks of the rear tension fork (5) and facing the opposite.

10. The non-binding fixation axial tension forceps for bone fracture according to claim 1, characterized in that each of the front tension fork rod (4) or the rear tension fork rod (5) has a telescopic adjustment structure and a locking structure to realize length adjustment to make the forceps body in an optimal operation position.