CN113616308A

CN113616308A - Kirschner wire operating forceps

Info

Publication number: CN113616308A
Application number: CN202010378769.2A
Authority: CN
Inventors: 刘晓霞
Original assignee: Zhengzhou Zezheng Technical Services Ltd
Current assignee: Zhengzhou Zezheng Technical Services Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2021-11-09

Abstract

A kirschner wire surgical forceps comprises two cheek parts which rotate relatively, wherein each cheek part extends out of a clamping head towards one end, and the two clamping heads form an open and close forceps mouth; one of them centre gripping head sets up to the pivot, and the axle sleeve is established to the pivot cover, and the one end of bushing connection pressure head, the pressure head other end stretch out the contact and connect and press the handle, and the pincers mouth sets up the structure that the restriction axle sleeve deviates from the pivot. The clamp mouth is provided with a structure for limiting the shaft sleeve to be separated from the rotating shaft, and the shaft sleeve is positioned between the root of the rotating shaft and the transverse groove. The kirschner wire operating forceps have simple structure and are easy to process and manufacture. The shaft sleeve is radially provided with an annular slotted hole, and the bottom of the annular slotted hole is matched with the transverse groove. When in bending, the Kirschner wire is bent into a hook shape along the limiting groove, so that the Kirschner wire can be formed at one time, and the bending is labor-saving; the press rotating shaft can be separated from the shaft hole after being bent, so that the cleaning and the disinfection are convenient.

Description

Kirschner wire operating forceps

Technical Field

The invention belongs to an orthopedic surgical instrument, in particular to an orthopedic kirschner wire bending surgical forceps.

Background

The kirschner wire is a commonly used internal fixation material in orthopedics, is a slender cylinder structure with a sharp end, the specification of the kirschner wire is generally fixed at about twenty centimeters, and the diameters of the kirschner wire are different from 0.5 to 3.5 millimeters. The bone fracture fixation device is used for fixing short fractures or avulsion fractures and other fractures with low stress, and is also commonly used for fixing temporary fracture blocks in orthopedic operations. Although the kirschner wire provides a lot of convenience for fracture reduction and fixation, a plurality of complications exist, and the complications mainly comprise two aspects: the sharp tail end of the kirschner wire protrudes the surrounding soft tissues and the kirschner wire is displaced to cause loosening.

To solve the above problem, the Kramer professor of washington university in usa introduced a surgical method in which the tail end of the kirschner wire was bent 180 ° in 7 steps. After the method is applied, the fixation loss of the fixation fracture of the kirschner wire is less, and the requirement of early movement after the operation can be met. The operation method has more operation steps and longer time consumption when the tail end of the Kirschner wire is bent, and the strength of the tail end of the Kirschner wire is reduced due to mechanical fatigue because the Kirschner wire is repeatedly bent for many times; in addition, the bending step is carried out after most of the Kirschner wires are inserted into the sclerotin, and the tail ends of the Kirschner wires lack necessary support when the common nipper pliers are used for bending, so that greater pressure is applied to the sclerotin, and the surrounding sclerotin is easy to crack. Furthermore, the application range is small because the Kirschner wire with the diameter of less than 1.5mm is generally applied.

Disclosure of Invention

In order to solve the problems that the Kirschner wire is difficult to bend and the structure of the Kirschner wire surgical forceps in the prior art is complex and difficult to process, the invention provides the Kirschner wire surgical forceps which comprise two cheek parts which rotate relatively, wherein each cheek part extends out of a clamping head towards one end, and the two clamping heads form an open-close forceps mouth; every cheek portion stretches out the pincers handle to the other end, constitute two holding heads of the pincers mouth that opens and shuts, one of them holding head sets up to the pivot, and the axle sleeve is established to the pivot cover, the one end of bushing connection pressure head, and the pressure head other end stretches out the contact and connects and presses the handle, and the pincers mouth sets up the structure that the restriction axle sleeve deviates from the pivot.

The clamp mouth is provided with a structure for limiting the shaft sleeve to be separated from the rotating shaft, a transverse groove for clamping the Kirschner wire is arranged on the rotating shaft forming the clamp mouth, and the shaft sleeve is positioned between the root part of the rotating shaft and the transverse groove.

The shaft sleeve is positioned between the root of the rotating shaft and the transverse groove, and only one shaft sleeve is positioned between the root of the rotating shaft and the transverse groove.

The shaft sleeve is radially provided with an annular slotted hole, and the bottom of the annular slotted hole is matched with the transverse groove.

The root of the other clamping head is provided with a limiting groove, and when the jaw clamps the Kirschner wire, the shaft sleeve or part of the shaft sleeve extends into the limiting groove.

The invention has the following beneficial effects:

the kirschner wire operating forceps have simple structure and are easy to process and manufacture.

When in bending, the Kirschner wire is bent into a hook shape along the limiting groove, so that the Kirschner wire can be formed at one time, and the bending is labor-saving; the press rotating shaft can be separated from the shaft hole after being bent, so that the cleaning and the disinfection are convenient.

Drawings

FIG. 1 is a schematic view of the structure of a kirschner wire forceps;

FIG. 2 is an enlarged schematic view of the exploded head of the K-wire forceps;

FIG. 3 is an enlarged schematic view of the exploded head of the K-wire forceps;

FIG. 4 is an enlarged view of a portion of the K-wire forceps pressure handle 241 and the pressure head;

FIG. 5 is an enlarged view of a portion of the K-wire forceps pressure handle 241 and the pressure head;

FIG. 6 is a partially enlarged view of the cross slot of the clamping surface of the kirschner-wire forceps, which is a special-shaped slot;

FIG. 7 is an enlarged view of a portion of the head of the K-wire forceps;

FIG. 8 is an enlarged view of a portion of the K-wire surgical forceps head;

FIG. 9 is an enlarged partial view of a K-wire surgical clamp holding a different diameter K-wire;

FIG. 10 is a schematic process diagram of an axis positioning method;

FIG. 11 is an enlarged schematic view of the exploded head of the K-wire forceps;

FIG. 12 is an enlarged partial view of the jaw of the K-wire forceps.

Detailed Description

Example 1: referring to fig. 11, the kirschner wire forceps comprise two cheek parts, a cheek part 201 and a cheek part 102, which rotate relatively, and each cheek part extends out of a clamping head towards one end, namely a clamping head I201 and a clamping head II 202. The two clamping heads form an open-close forceps mouth 260; each cheek portion extends beyond the other end of the jawset, shown as two jawset handles 301 and 302.

The clamping head I201 and the clamping head II 202 of the jaw mouth forming the opening and closing structure are characterized in that one of the clamping heads is set to be a rotating shaft 230, the rotating shaft 230 is sleeved with a shaft sleeve 232, the shaft sleeve 232 is connected with one end of a pressure head 231, the other end of the pressure head 231 extends out of a contact 2312 and is connected with a pressing handle 241, and the jaw mouth 260 is provided with a structure for limiting the shaft sleeve 232 to be separated from the rotating shaft 230.

The pincer mouth 260 is provided with a structure for limiting the shaft sleeve 232 from falling out of the rotating shaft 230, a transverse groove 2110 for clamping a kirschner wire is arranged on the rotating shaft 230 forming the pincer mouth 260, and the shaft sleeve 232 is positioned between the root of the rotating shaft 230 and the transverse groove 2110.

The bushing 232 is located between the root of the shaft 230 and the transverse slot 2110, and only one bushing is located between the root of the shaft 230 and the transverse slot 2110.

The sleeve 232 is radially provided with an annular slot 2320, and the bottom of the annular slot 2320 is matched with the transverse slot 2110. After the bottom of the annular slot 2320 is matched with the transverse groove 2110, in the process of rotating and bending around the rotating shaft, the bottom of the annular slot 2320 is always exposed out of the transverse groove 2110, the transverse groove 2110 clamps the kirschner wire, at the moment, the kirschner wire is fixed by the transverse groove 2110, and the kirschner wire limits the shaft sleeve 232 between the root of the rotating shaft 230 and the transverse groove 2110 to be separated from the rotating shaft 230.

The root of the other clamping head is provided with a limit groove 2021, and when the forceps mouth 260 clamps the kirschner wire, the shaft sleeve 232 or part of the shaft sleeve extends into the limit groove 2021.

The working process of the invention is as follows:

the shaft hole 2300 on the pressure head 231 is sleeved on the rotating shaft 230, so that the shaft sleeve 232 is positioned between the root of the rotating shaft 230 and the transverse groove 2110, after the bottom of the annular groove hole 2320 is matched with the transverse groove 2110, the bottom of the annular groove hole 2320 is exposed out of the transverse groove 2110, and the transverse groove 2110 is used for clamping a kirschner wire. Finally, the

transverse slots

2110 and 2320 define the position of the shaft sleeve and the rotating shaft.

In the initial state, the contact 2312 on the ram 231 is on one side of the gripping head i 201. The

handles

301 and 302 are moved to open the jaw 260 and place the k-wire, which is now held in place by the transverse slot 2110.

The

handles

301 and 302 rotate, the jaw 260 clamps the kirschner wire, the limiting groove 2021 is arranged at the root of the other clamping head, and at the moment, the shaft sleeve 232 or part of the shaft sleeve extends into the limiting groove 2021.

The pressing handle 241 is rotated to make the limiting groove 2310 on the contact 2312 contact with the upper end of the kirschner wire. During rotation of the pressing handle, the k-wire deforms around the gripping head ii 202. After the Kirschner wire deforms to a certain angle, the Kirschner wire is held into a hook shape under the combined action of the cambered surface 2311 on the inner side of the pressure head 231 and the contact 2312. Then, the

handles

301 and 302 are turned, and the forceps mouth 260 is opened. Because the front end of the forceps mouth 260 is thin, the hooked kirschner wire can be smoothly taken out at the moment.

Example 2: referring to fig. 1, the kirschner forceps comprises a forceps handle 301, a forceps handle 302, a handle forceps shaft 103, a forceps head 210, a forceps head 220, a pressing handle 241 and a forceps mouth 260.

As shown in fig. 2, a kirschner wire forceps comprises two cheek rotating parts which rotate relatively, a cheek rotating part i 101 and a cheek rotating part ii 102, wherein the cheek rotating part i 101 and the cheek rotating part ii 102 respectively extend out of a clamping head i 201 and a clamping head ii 202 towards one end, and the clamping head i 201 and the clamping head ii 202 form an open and close forceps mouth 260; one of the two clamping heads I201 is provided with a cross slot surface 0. The transverse groove surface of the Kirschner wire clamping device directly extends out of the cheek rotating part, and the Kirschner wire clamping device is labor-saving and easy to clamp due to the fact that the distance between the transverse groove for clamping the Kirschner wire and the axis of the cheek rotating shaft is short. When bending the kirschner wire like this, the cross slot 2110 of I201 clamping face of clamping head is spacing with the kirschner wire, and the kirschner wire is bent around another II 202 clamping heads, and II 202 tip of clamping head is thinner than the root, and the surface is smooth, and the kirschner wire after conveniently bending is deviate from.

A shaft hole 240 is formed in the clamping head I201 provided with the clamping surface 211 or the cheek portion 102 extending out of the clamping head I201, and the shaft hole 240 is a blind hole. The protruding direction of the pressing rotary shaft 230 coincides with the direction of the shaft hole 240.

The pressing rotary shaft 230 is provided with a pressing head 231, the pressing head 231 is connected with a pressing handle 241, and the pressing head 231 can press the clamped kirschner wire into a hook shape in the process that the pressing handle 241 rotates around the pressing rotary shaft 230, so that the kirschner wire bending pliers are formed.

As shown in fig. 2, the shaft hole 240 is tangent to the upper end face of the clamping head i 201, the center line of the rotating shaft 240 is tangent to the bottom of the transverse groove 2110 of the clamping face 211, so that the rotation center of the pressing handle 241 is always tangent to the clamped kirschner wire, the rotating hole 240 is matched with the rotating shaft 230 to rotate the pressing handle 241, the kirschner wire is bent and deformed around the clamping head ii 202, the rotation center of the rotating shaft is always closest to the central axis of the bending and rotating kirschner wire in the whole deformation process, and the shape of the hook is the smallest.

The pressing rotating shaft 230 is detachable due to the cylindrical boss on the side of the end face of one end of the pressing head 231, and is convenient to clean before and after use. The other end of the pressing rotary shaft is connected with the pressure head 231 as a whole,

a contact 2312 is provided on the ram 231, which includes a contact or only a contact for bending. The limiting groove 2320 is formed in the pressure head 231, the limiting groove 2320 is always tangent to the kirschner wire, and when the pressure head 231 is rotated to press the kirschner wire into a hook shape, the kirschner wire always penetrates through the transverse groove 2110 and the annular groove 2320, so that the relative position of the shaft hole 240 and the pressing rotating shaft 230 in the relative rotation process is always limited (namely locked), and the pressing rotating shaft 230 is prevented from falling out of the shaft hole 240. The shortest length of the limiting groove 2320 is that, in the process that the rotary pressure head 231 presses the kirschner wire into a hook shape, the section of the annular groove 2320 is always in contact with the kirschner wire.

The medial surface 2311 on the pressure head 231 can be arcwall face or plane, and when the great diameter kirschner wire of centre gripping, the curved radian of arcwall face is great, can set up the guide way on the arcwall face 2311.

The contacts 2312 are provided with pressing grooves 2310 that mate with the cross grooves 2110. The cross-sections of the annular groove 2320 and the transverse groove 2110 are U-shaped, and the cross-section of the pressing groove 2310 may be rectangular, U-shaped, semicircular and small semicircular. The small semicircle is the arc line of the annular groove or the transverse groove which is smaller than the arc line of the semicircle. In the process of pressing the Kirschner wire into the hook shape, the pressing groove 2310 is tangent with the Kirschner wire all the time, the pressing groove 2310 limits the position of the Kirschner wire, the lateral twisting is not generated in the bending deformation process of the Kirschner wire to the maximum extent, and the Kirschner wire is pressed into the regular hook shape.

Generally speaking can not appear the pressure head and the axial force that pincers mouth breaks away from, when great hard, when the deviation appears in hard direction, produce the axial force that pressure head and pincers mouth break away from, because the ke shi needle blocks simultaneously at cross slot and spacing inslot, ke shi needle restriction spacing groove breaks away from with the cross slot this moment, because spacing groove and pressure head are integrative, just also restrict the pressure head and break away from with pincers mouth.

In the bending process, the shaft 230 rotates around the shaft hole 240, when the forceps mouth clamps the kirschner wire through the transverse groove 2110, the kirschner wire is clamped in the transverse groove, meanwhile, the kirschner wire is also clamped in the limiting groove, the pressure head is limited to be separated from the forceps mouth, and the kirschner wire can be held into a regular hook shape as long as the position of the selecting shaft is properly selected.

The hole 240 or the shaft 230 is used for being matched and connected with the pressing handle 241, and the pressing head 231, the contact 2312 and the pressing handle 241 which are connected with the hole 240 or the shaft 230 and have an integral structure can also be separated parts.

Example 3: referring to fig. 1, the kirschner forceps comprises a forceps handle 301, a forceps handle 302, a handle forceps shaft 103, a forceps head 210, a forceps head 220, a pressing handle 241 and a forceps mouth 260.

As shown in fig. 3, a kirschner wire forceps comprises two cheek rotating parts which rotate relatively, a cheek rotating part i 101 and a cheek rotating part ii 102, wherein the cheek rotating part i 101 and the cheek rotating part ii 102 respectively extend out of a clamping head i 201 and a clamping head ii 202 towards one end, and the clamping head i 201 and the clamping head ii 202 form an open and close forceps mouth 260; the cheek part rotating part I101 and the cheek part rotating part II 102 respectively extend out of the handle I301 and the handle II 302 towards the other end, and one clamping head I201 of the two clamping heads is provided with a transverse groove surface. The transverse groove surface of the Kirschner wire clamping device directly extends out of the cheek rotating part, and the Kirschner wire clamping device is labor-saving and easy to clamp due to the fact that the distance between the transverse groove for clamping the Kirschner wire and the axis of the cheek rotating shaft is short. When bending the kirschner wire like this, the cross slot 2110 of I201 clamping face of clamping head is spacing with the kirschner wire, and the kirschner wire is bent around another II 202 clamping heads, and II 202 tip of clamping head is thinner than the root, and the surface is smooth, and the kirschner wire after conveniently bending is deviate from.

The cross groove 2110 of the clamping head I201 limits the Kirschner wire, and the cross groove 2110 is a small semicircular groove. The small semicircle is the arc line of the annular groove or the transverse groove which is smaller than the arc line of the semicircle. The small semicircular groove can hold a kirschner wire with various diameter ranges, but when the small-diameter kirschner wire is held, the kirschner wire slides in the vertical direction of the transverse groove 2110.

A shaft hole 240 is formed in the clamping head I201 provided with the clamping surface 211 or the cheek portion 102 extending out of the clamping head I201, and the shaft hole 240 is a blind hole. The protruding direction of the pressing rotary shaft 230 coincides with the direction of the shaft hole 240. The pressing rotary shaft 230 is provided with a pressing head 231, the pressing head 231 is connected with a pressing handle 241, and the pressing head 231 can press the clamped kirschner wire into a hook shape in the process that the pressing handle 241 rotates around the pressing rotary shaft 230, so that the kirschner wire bending pliers are formed.

The pressing rotating shaft 230 is detachable due to the cylindrical boss on the side of the end face of one end of the pressing head 231, and is convenient to clean before and after use. The other end of the pressing rotating shaft is connected with the pressure head 231 into a whole, the pressure head 231 is provided with a contact 2312, and the pressure head comprises a contact or only the contact is used for bending.

A small semicircular limiting groove 2320 and a Kirschner wire limiting protrusion 2330 are arranged in the pressure head 231, the inner side of the limiting protrusion 2330 is connected with the limiting groove 2320 into a whole, and the length of the protrusion exceeds the central axis position of the Kirschner wire, so that the Kirschner wire always passes through the transverse groove 2110 and the inner sides of the small semicircular groove 2320 and the limiting protrusion 2330 in the process of pressing the Kirschner wire into a hook shape by rotating the pressure head 231. The limiting protrusion 2330 is always tangent to the kirschner wire, limits the relative position of the shaft hole 240 and the pressing rotating shaft 230 in the relative rotation process, and prevents the pressing rotating shaft 230 from coming out of the shaft hole 240. The shortest length of the limiting groove 2320 is that, in the process that the rotary pressure head 231 presses the kirschner wire into a hook shape, the section of the annular groove 2320 is always in contact with the kirschner wire.

Alternatively, as shown in fig. 4 and 5, the pressing head 231 is integrally connected to the limiting protrusion 2330, increasing the strength of the pressing head 231.

The limiting groove 2320 and the pressing groove 2310 may be circular, U-shaped or rectangular. The depth of the limiting groove 2320 is larger than or equal to the depth of the transverse groove 2110 of the clamping surface 211 of the clamping head I201, and the width of the limiting groove is smaller than the thickness of the pressure head 231.

The contact 2312 is provided with a pressing groove 2310, so that the pressing groove 2310 is tangent to the Kirschner wire all the time in the process of pressing the Kirschner wire into a hook shape by the pressing groove 2310, the Kirschner wire is limited, the lateral twisting is prevented in the bending deformation process of the Kirschner wire to the maximum extent, and the Kirschner wire is pressed into a regular hook shape.

Generally speaking can not appear the pressure head and the axial force that pincers mouth breaks away from, when great hard, when the deviation appears in hard direction, produce the axial force that pressure head and pincers mouth break away from, because the ke shi needle blocks simultaneously at cross slot and spacing inslot, ke shi needle restriction spacing groove breaks away from with the cross slot this moment, because spacing groove and pressure head are integrative, just also restrict the pressure head and break away from with pincers mouth. In the bending process, the shaft rotates around the shaft hole, when the forceps mouth clamps the kirschner wire through the transverse groove, the kirschner wire is clamped in the transverse groove, the kirschner wire is also clamped in the limiting groove, the limiting pressure head is separated from the forceps mouth, and the kirschner wire can be held into a regular hook shape as long as the position of the selecting shaft is properly selected.

The hole 240 or the shaft 230 is used for matching and connecting the pressing handle 241, and the pressing head 231, the contact 2312 and the pressing handle 241 which are connected by the hole 240 or the shaft 230 and have an integral structure can also be separated parts.

Example 4: referring to fig. 1, the kirschner forceps comprises a forceps handle 301, a forceps handle 302, a handle forceps shaft 103, a forceps head 210, a forceps head 220, a pressing handle 241 and a forceps mouth 260.

As shown in fig. 2, a kirschner wire forceps comprises two cheek rotating parts which rotate relatively, a cheek rotating part i 101 and a cheek rotating part ii 102, wherein the cheek rotating part i 101 and the cheek rotating part ii 102 respectively extend out of a clamping head i 201 and a clamping head ii 202 towards one end, and the clamping head i 201 and the clamping head ii 202 form an open and close forceps mouth 260; the cheek part rotating part I101 and the cheek part rotating part II 102 respectively extend out of the handle I301 and the handle II 302 towards the other end, and one clamping head I201 of the two clamping heads is provided with a transverse groove surface. The transverse groove surface of the Kirschner wire clamping device directly extends out of the cheek rotating part, and the Kirschner wire clamping device is labor-saving and easy to clamp due to the fact that the distance between the transverse groove for clamping the Kirschner wire and the axis of the cheek rotating shaft is short. When bending the kirschner wire like this, the cross slot 2110 of I201 clamping face of clamping head is spacing with the kirschner wire, and the kirschner wire is bent around another II 202 clamping heads, and II 202 tip of clamping head is thinner than the root, and the surface is smooth, and the kirschner wire after conveniently bending is deviate from.

The clamping head I201 provided with the clamping surface 211 or the cheek part 102 extending out of the clamping head I201 is provided with a shaft hole 240, and the shaft hole 240 is a blind hole. The protruding direction of the pressing rotary shaft 230 coincides with the direction of the shaft hole 240. The pressing rotary shaft 230 is provided with a pressing head 231, the pressing head 231 is connected with a pressing handle 241, and the pressing head 231 can press the clamped kirschner wire into a hook shape in the process that the pressing handle 241 rotates around the pressing rotary shaft 230, so that the kirschner wire bending pliers are formed.

The shaft hole 240 is tangent to the upper end face of the clamping head I201, the central line of the rotating shaft 240 is tangent to the bottom of the transverse groove 2110 of the clamping face 211, when a small-diameter Kirschner wire is clamped, the rotating center of the pressing handle 241 is always tangent to the clamped Kirschner wire, the rotating hole 240 is matched with the rotating shaft 230 and then rotates the pressing handle 241, the Kirschner wire is bent and deformed around the clamping head II 202, in the whole deformation process, the rotating center of the rotating shaft is always closest to the central axis of the bent and rotated Kirschner wire, and the shape of the hook is the smallest.

A limiting groove 2320 and a Kirschner wire limiting protrusion 2330 are arranged in the pressure head 231, the inner side of the limiting protrusion 2330 is connected with the limiting groove 2320 into a whole, and the length of the protrusion exceeds the central axis position of the Kirschner wire, so that the Kirschner wire always passes through the transverse groove 2110 and the inner sides of the groove 2320 and the limiting protrusion 2330 in the process of pressing the Kirschner wire into a hook shape by rotating the pressure head 231. The limiting protrusion 2330 is always tangent to the kirschner wire, limits the relative position of the shaft hole 240 and the pressing rotating shaft 230 in the relative rotation process, and prevents the pressing rotating shaft 230 from coming out of the shaft hole 240. The shortest length of the limiting groove 2320 is that, in the process that the rotary pressure head 231 presses the kirschner wire into a hook shape, the section of the annular groove 2320 is always in contact with the kirschner wire.

Alternatively, as shown in fig. 4 and 5, the pressing head 231 is integrally connected to the limiting protrusion 2330, thereby increasing the strength of the pressing head 231.

As shown in fig. 6, the transverse grooves 2110 are profiled grooves, and the contact 2312 is provided with pressing grooves 2310 which are matched with the transverse grooves 2110. The special-shaped groove is formed by combining two or more arc lines smaller than a semicircle, wherein the arc lines are groove surface transverse grooves. Referring to fig. 9, the jaw 260 holds a partially enlarged view of a steel needle having a different diameter. The adoption of the special-shaped groove can clamp the kirschner wire with a larger diameter range, and the kirschner wire can slide little or not slide in the vertical direction of the transverse groove 2110.

The cross-sections of the annular groove 2320 and the pressing groove 2310 may be rectangular, U-shaped, semicircular, and small semicircular. The small semicircle is the arc line of the annular groove or the transverse groove which is smaller than the arc line of the semicircle. In the process of pressing the Kirschner wire into the hook shape, the pressing groove 2310 on the contact is tangent with the Kirschner wire all the time, the pressing groove 2310 limits the position of the Kirschner wire, the lateral twisting is not generated in the bending deformation process of the Kirschner wire to the maximum extent, and the Kirschner wire is pressed into the regular hook shape.

In the bending process, the shaft rotates around the shaft hole, when the forceps mouth clamps the kirschner wire through the transverse groove, the kirschner wire is clamped in the transverse groove, the kirschner wire is also clamped in the limiting groove, the limiting pressure head is separated from the forceps mouth, and the kirschner wire can be held into a regular hook shape as long as the position of the selecting shaft is properly selected.

Example 5: as shown in fig. 1 and fig. 2, a kirschner wire forceps comprises two cheek rotating parts which rotate relatively, a cheek rotating part i 101 and a cheek rotating part ii 102, wherein the cheek rotating part i 101 and the cheek rotating part ii 102 respectively extend out of a clamping head i 201 and a clamping head ii 202 towards one ends, and the clamping head i 201 and the clamping head ii 202 form an open and close forceps mouth 260; the cheek part rotating part I101 and the cheek part rotating part II 102 respectively extend out of the handle I301 and the handle II 302 towards the other end, and one clamping head I201 of the two clamping heads is provided with a transverse groove surface. The transverse groove surface of the Kirschner wire clamping device directly extends out of the cheek rotating part, and the Kirschner wire clamping device is labor-saving and easy to clamp due to the fact that the distance between the transverse groove for clamping the Kirschner wire and the axis of the cheek rotating shaft is short. When bending the kirschner wire like this, the cross slot 2110 of I201 clamping face of clamping head is spacing with the kirschner wire, and the kirschner wire is bent around another II 202 clamping heads, and II 202 tip of clamping head is thinner than the root, and the surface is smooth, and the kirschner wire after conveniently bending is deviate from.

As shown in fig. 7, the holding head i 201 provided with the holding surface 211 or the cheek portion 102 protruding from the holding head i 201 is provided with a pressing rotary shaft 230, and the protruding direction of the pressing rotary shaft 230 coincides with the protruding direction of the holding head i 201 provided with the holding surface 211. Thus, the pressing shaft 230 is sleeved with the pressing head 231, the pressing head 231 is provided with the contact 2312, and the pressing head comprises the contact or only the contact is used for bending. The pressing handle 241 is connected to the pressing head 231, and the pressing head 231 can press the held kirschner wire into a hook shape, so that the kirschner wire bending forceps are formed.

The pressing rotating shaft 230 is sleeved with the pressing head 231, the pressing head 231 is provided with a shaft hole 2300 matched with the pressing rotating shaft 230 and connected with the pressing handle 241, and the shaft hole 2300 is a blind hole. The rotary indenter 231 can press the held kirschner wire into a hook shape, and at this time, the kirschner wire bending forceps are formed.

A partial circular shaft sleeve 232 is formed on the periphery of the shaft hole 2300 of the pressure head 231, a section of annular groove 2320 is arranged on the outer side of the partial shaft sleeve 232, and the center line of the bottom of the annular groove 2320 is tangent to the center line of the bottom of the transverse groove 2110 on the clamping surface 211. The shortest length of the limiting groove 2320 is that, in the process that the rotary pressure head 231 presses the kirschner wire into a hook shape, the section of the annular groove 2320 is always in contact with the kirschner wire. With such a structure, when the shaft hole 2300 of the pressing head 231 is in plug fit with the pressing rotating shaft 230, since the center line of the groove bottom of the annular groove 2320 is tangent to the center line of the groove bottom of the transverse groove 2110 on the clamping surface 211, the kirschner wire passes through both the transverse groove 2110 and the annular groove 2320, and the relative position of the shaft hole 2300 and the pressing rotating shaft 230 during relative rotation is limited (i.e., locked), so that the shaft hole 2300 is prevented from falling off the pressing rotating shaft 230.

Optionally, as shown in fig. 8, the pressing shaft 230 is sleeved with the pressing head 231, the pressing head 231 is provided with a shaft hole 2300 matched with the pressing shaft 230 and connected to the pressing handle 241, and the shaft hole 2300 is a through hole. After the press head is installed on the shaft, the outer end face of the rotating shaft 230 is flush with the outer end face of the press head 231. The outer side of the shaft hole is provided with a circular ring which is a shaft sleeve 232, the shaft sleeve is provided with a limiting groove 2320, and the contact 2311 is provided with a limiting groove 2310. In the bending process, the shaft sleeve rotates around the shaft, when the forceps mouth clamps the Kirschner wire through the transverse groove, the Kirschner wire is clamped in the transverse groove, and meanwhile, the Kirschner wire is also clamped in the limiting groove, so that the pressure head is limited to be separated from the forceps mouth.

The shortest length of the limiting groove 2320 is that, in the process that the rotary pressure head 231 presses the kirschner wire into a hook shape, the section of the annular groove 2320 is always in contact with the kirschner wire. With such a structure, when the rotary ram 231 presses the kirschner wire into a hook shape, the kirschner wire always passes through both the transverse groove 2110 and the annular groove 2320, so as to always restrict (i.e., lock) the relative position of the shaft hole 2300 and the pressing rotary shaft 230 during the relative rotation process, and prevent the shaft hole 2300 from coming off the pressing rotary shaft 230.

The contact is provided with a pressing groove 2310, and in the process of pressing the Kirschner wire into a hook shape, the pressing groove 2310 always limits the Kirschner wire and presses the Kirschner wire into a regular hook shape.

The cross section of the annular groove 2320 or the transverse groove 2110 or the pressing groove 2310 is rectangular, U-shaped, semicircular or semicircular. The small semicircle is the arc line of the annular groove or the transverse groove which is smaller than the arc line of the semicircle.

The shaft hole or the shaft 230 matched with the shaft hole is used for being matched and connected with the pressing handle 241, and the pressing head 231, the contact 2312 and the pressing handle 241 which are connected with the shaft hole or the shaft 230 and have an integrated structure can also be separated parts.

Example 6: a method for positioning the axis of a hole or a shaft of a kirschner wire surgical clamp comprises the following steps:

as shown in fig. 10, the kirschner wire with the length of pi a is a straight line between the O point (0, 0) and the a point (0, pi a) in the X, Y coordinate system. The shape in the X, Y coordinate system after bending is a semicircle with the B point (-a, 0) as the center of circle and a as the radius in the second quadrant. One end of the semicircle is point O, and the other end is point C (-2 a, 0).

(1) The starting point of the bending contact is always on the line segment OA, the end point of the bending contact is at the point C, and then the axis meets the equation:

namely:

； h

①

(2) selecting the distance from the axis to the point C to be equal to the distance from the axis to the line segment OA, wherein the axis satisfies the equation:

namely:

； ②

(3) taking h =0 for equation (i), and then drawing x = -a to obtain a BL straight line;

if h = π a, then

；

Considering that the molded core block is arranged in the semi-circle after bending and can not interfere with the contact,

equation of pair 2

Then, the drawing is a hyperbola among BN;

therefore, the range of the axis is as follows: BN, NL, LP, PM, MB.

Wherein, the point Q is the intersection point of BN hyperbola and AC, and the point P is the intersection point of straight line AC, BL and MN; d is the intersection of line MN and OA.

In order to ensure that the contact is not far away from the bending end of the Kirschner wire in the bending process, the range of the selected axis is as follows: BQ, QP, PM, MB.

Because the moving path of the bending end in the bending process of the Kirschner wire is an involute between the AC, if the contact can be always contacted with the Kirschner wire, the distance from the axis to the involute is greater than the distance from the axis to the point C, and the range of the axis is a region surrounded by BQ, QD, DM and MB.

The range of the axis determined by the method is influenced by the forming core block (bending shape) and the diameter of the Kirschner wire, and the range of the axis is expanded to the periphery of the range. In some cases, the guide groove may be provided in the ram so that the axis of the ram can be out of the above range.

Claims

1. A kirschner wire surgical forceps comprises two cheek parts which rotate relatively, wherein each cheek part extends out of a clamping head towards one end, and the two clamping heads form an open and close forceps mouth; every cheek portion stretches out the pincers handle to the other end, its characterized in that: the clamp comprises a clamp mouth, a pressing head and a clamping head, wherein the two clamping heads form the opening and closing clamp mouth, one of the two clamping heads is set to be a rotating shaft, the rotating shaft is sleeved with a shaft sleeve, the shaft sleeve is connected with one end of the pressing head, the other end of the pressing head extends out of a contact and is connected with a pressing handle, and the clamp mouth is provided with a structure for limiting the shaft sleeve to be separated from the rotating shaft.

2. The kirschner wire forceps of claim 1, wherein: the clamp mouth is provided with a structure for limiting the shaft sleeve to be separated from the rotating shaft, a transverse groove for clamping the Kirschner wire is arranged on the rotating shaft forming the clamp mouth, and the shaft sleeve is positioned between the root part of the rotating shaft and the transverse groove.

3. The kirschner wire forceps of claim 2, wherein: the shaft sleeve is positioned between the root of the rotating shaft and the transverse groove, and only one shaft sleeve is positioned between the root of the rotating shaft and the transverse groove.

4. The kirschner wire forceps of claim 2, wherein: the shaft sleeve is radially provided with an annular slotted hole, and the bottom of the annular slotted hole is matched with the transverse groove.

5. The kirschner wire forceps of any one of claims 1-4, further comprising: the root of the other clamping head is provided with a limiting groove, and when the jaw clamps the Kirschner wire, the shaft sleeve or part of the shaft sleeve extends into the limiting groove.