Long-arm nail breaking device

Abstract

The utility model discloses a long-arm nail breaking device which comprises a sleeve and a core tube, the core tube comprises a round tube section and a rectangular tube section, the round tube section and the rectangular tube section are connected through a bent transition section, and the axis of the round tube section is parallel to but does not coincide with the axis of the rectangular tube section; the round pipe section of the core pipe is nested in the sleeve and can slide in the axial direction of the sleeve, the rectangular pipe section of the core pipe is exposed out of the sleeve, a gap is formed in the rectangular pipe section of the core pipe, the gap penetrates through the transition section and extends towards the round pipe section by a certain length, and the rectangular pipe section can be opened into two parts with the gap as an interface in a natural state; meanwhile, the two opened parts can be restrained by the sleeve, and the two opened parts can be contracted to form a clamping state under the restraint of the sleeve. The long-arm nail breaking device is convenient to operate when being used in an operation, and the operation efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a long arm nail breaker belongs to surgical medical instrument technical field. BACKGROUND

[0002] Long arm nail is a kind of medical instrument commonly used in orthopedic surgery field, it is generally composed of nail body, nail cap etc. The nail body is generally slender, has suitable length and thickness specification to meet different surgical sites and fixed needs;The nail cap part is convenient for the operation of instrument during operation, like screwdriver and other tools can be used on the nail cap to screw in or screw out the nail, and the nail cap of part long arm nail can also have some special design, facilitate and other orthopedic implants are used together. For example, the nail rod system often used in spinal internal fixation, the nail here is long arm nail, it has U-shaped top cap to facilitate cooperation with connecting rod, and is provided with fracture groove on the two arms of top cap;When long arm nail is screwed into the vertebra, the excess top cap needs to be broken along the fracture groove and taken out, the operation here needs to use the breaker. The existing breaker only has the breaking function, cannot effectively hold the broken nail cap, still needs additional clamping operation, affects the operation efficiency, and the operation and use are inconvenient. SUMMARY

[0003] In view of the problems in the prior art, the utility model provides a long arm nail breaker to solve the problems of inconvenient operation and low efficiency of the existing breaker.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A long arm nail breaker, including sleeve, core pipe, the core pipe includes round pipe section and rectangular pipe section, the round pipe section is connected with the rectangular pipe section through the bending transition section, and the axis of the round pipe section is parallel to the axis of the rectangular pipe section but does not coincide;The round pipe section of core pipe is nested in the sleeve, and the round pipe section can slide along the axial direction of sleeve, and the rectangular pipe section of core pipe is exposed outside the sleeve, and the rectangular pipe section is provided with slit, and the slit passes through the transition section, and the slit extends to the round pipe section for a certain length, and the rectangular pipe section can be opened into two parts as the interface of slit in natural state, and the two parts opened simultaneously can also be constrained by the sleeve, and the two parts opened under the constraint of sleeve can also contract to form the clamping state.

[0006] Further, the breaking device further comprises a button, a through hole is arranged on the button, the round pipe section of the core pipe passes through the through hole and is fixedly connected with the button, the button is sleeved on the inner side of one end of the sleeve, and a spring is arranged in the space between the button and the sleeve. In this way, the spring is compressed by pressing the button, the button drives the core pipe to move, the rectangular pipe section of the core pipe is away from the sleeve, the two parts of the rectangular pipe section are naturally opened to a certain width and thus the nail cap of the long arm nail is conveniently sleeved or the broken nail cap is naturally separated from the rectangular pipe section. When the button is released, the spring pushes the button outward, the button drives the core pipe to move along the axial direction relative to the sleeve, at this moment, the transition section of the core pipe gradually moves to the sleeve, and under the constraint of the sleeve, the two parts of the rectangular pipe section of the core pipe are contracted and folded and thus the clamping state is recovered.

[0007] Further, a limiting structure is arranged between the two parts of the rectangular pipe section which are opened, the limiting structure can be an isosceles trapezoid, and the gap surrounds two legs and one longer base of the isosceles trapezoid. The limiting structure of the isosceles trapezoid can prevent the two parts of the rectangular pipe section of the core pipe from being separated too far, thus the long arm nail cannot be used or cannot be recovered to the initial state, and the opening distance is limited.

[0008] Beneficial effects: the long arm nail breaking device, under the initial state, the spring drives the button to move the core pipe along the sleeve, the other end of the sleeve forms a constraint on the transition section of the core pipe, the two parts of the rectangular pipe section of the core pipe are inwardly contracted to form a clamping state, so that the nail cap of the long arm nail is conveniently broken; when the button is pressed, the core pipe is away from the sleeve, the rectangular pipe section of the core pipe is naturally opened, at this moment, the nail cap of the long arm nail is conveniently sleeved or the broken nail cap is naturally separated from the rectangular pipe section. Therefore, the long arm nail breaking device is convenient to operate when used in surgery, the curved transition section does not affect the vision, and the surgery efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is the front view of the breaking device.

[0010] Figure 2 is the front view of the breaking device.

[0011] Figure 3 is the schematic view of the sleeve structure.

[0012] Figure 4 is the schematic view of the core pipe structure.

[0013] Figure 5 is Figure 4 the schematic view of the AA section.

[0014] Figure 6 is Figure 4 the enlarged view of the right end of the core pipe.

[0015] Figure 7 This is a diagram showing the usage status of the breaker.

[0016] The markings in the diagram are: 1. Handle, 2. Sleeve, 3. Core tube, 4. Button, 5. Spring, 6. Long arm nail, 21. Third step, 31. Round tube section, 32. Rectangular tube section, 33. Bend transition section, 34. Gap, 35. Limiting structure, 41. First step, 42. Second step, 61. Nail head, 62. Break groove, 321. Upper part, 322. Lower part. Detailed Implementation

[0017] The present invention will now be described in a clear and complete manner with reference to the accompanying drawings.

[0018] like Figures 1-2 As shown, a long-arm nail breaker includes a handle 1, a sleeve 2, a core tube 3, a button 4, etc., wherein the structure of the sleeve 2 is as follows: Figure 3 As shown, the sleeve is a hollow cylinder with a larger outer diameter at its left end. A handle 1 is fixedly installed on the outer periphery of the left end for easy gripping of the breaker. The core tube 3 is nested inside the sleeve 2. A third step 21 is provided on the inner wall of the left end of the sleeve 2, where a spring 5 and a button 4 are placed.

[0019] The button 4 is cylindrical with a through hole along its axis. The left end of the core tube 3 passes through the through hole and is fixedly connected to the button. Two circular steps, a first step 41 and a second step 42, are provided around the button's axis on its outer surface. The first step is away from the core tube, and the second step is close to the core tube. The diameter of the first step is larger than the diameter of the second step. The button 4 is coaxially inserted into the left end of the sleeve 2. The first step 41 of the button is located outside the sleeve to prevent the end of the button from completely entering the sleeve. The second step 42 of the button is located inside the sleeve. A spring 5 is placed in the annular space between the second step 42 and the third step 21 of the sleeve. The spring 5 is fitted onto the right end of the button. Thus, when the sleeve 2 remains stationary, pressing the button 4 compresses the spring 5, causing the button 4 to move the core tube 3 synchronously to the right along the axis of the sleeve 2. When the button 4 is released, the spring 5 drives the button 4, along with the core tube 3, to move to the left in the opposite direction along the axis of the sleeve 2.

[0020] To prevent the core tube 3 from being pulled out of the sleeve, a special design is made for the core tube 3, and the structure of the core tube 3 is as follows: Figure 4 As shown, the left part of the core tube 3 is a circular tube segment 31, and the right part of the core tube is a rectangular tube segment 32 (see...). Figures 5-6), the circular tube section 31 and the rectangular tube section 32 are connected through a curved transition section 33, the setting of the curved transition section realizes that the axis of the circular tube section of the core tube is parallel to the axis of the rectangular tube section but not coincident, so that the view is not blocked; meanwhile, the circular tube section 31 of the core tube is nested in the sleeve 2, the circular tube section can slide along the axial direction of the sleeve, the rectangular tube section 32 of the core tube is exposed outside the sleeve, the length of the core tube is designed to match the sleeve, so that the curved transition section 33 is just clamped at the right port of the sleeve 2 under the action of the spring.

[0021] As shown in Figures 5-6 , a gap 34 with a certain width is formed on the rectangular tube section 32 of the core tube, the gap 34 extends to the circular tube section 31 for a certain length, and the rectangular tube section is naturally opened into two parts, i.e. an upper part 321 and a lower part 322, with the gap as the interface. After the rectangular tube section is opened, the internal space is increased to facilitate the accommodation of the tail cap of the long arm nail. Meanwhile, in order to prevent the distance between the upper part and the lower part from being too large after being opened, a limiting structure 35 is arranged between the two parts of the rectangular tube section, for example, the limiting structure in this example is isosceles trapezoidal, and the gap 34 surrounds the two legs and one lengthier base of the isosceles trapezoid. The limiting structure is actually a kind of nesting structure, the trapezoidal block is part of the upper part 321, and there is a trapezoidal groove in the lower part 322 to accommodate the trapezoidal block. The gap 34 surrounds the trapezoidal block, and the limiting structure allows the upper part and the lower part to be separated by a certain distance, while preventing the distance between the two from being too large. The limiting structure is designed ingeniously.

[0022] The use state of the long arm nail breaker described above is shown in Figure 7 . A long arm nail 6 is shown in Figure 7 , which includes a U-shaped nail cap 61, and a breaking groove 62 is arranged on the nail cap. In the spinal fixation surgery, the long arm nail is first driven into the spine, and when it is necessary to remove the excess nail cap, at this time, one hand holds the handle 1 of the breaker, and the thumb of the hand presses the button 4 to compress the spring 5, the button 4 drives the core tube 3 to move right along the sleeve 2, at this time, the transition section of the core tube is no longer constrained by the sleeve, and the upper part and the lower part of the rectangular tube section naturally open, then the breaker is moved to make the rectangular tube section of the breaker wrap around one nail cap arm of the long arm nail, then the button is released, the spring drives the button and the core tube to move in the opposite direction relative to the sleeve, and the right end of the sleeve forms a constraint on the transition section of the core tube, so that the two parts of the rectangular tube section of the core tube are folded inward to form a clamping state, and the rectangular tube section of the breaker clamps the nail cap, at this time, the handle of the breaker is swung laterally, and the nail cap can be broken off from the breaking groove, the broken nail cap is still clamped on the rectangular tube section, at this time, the breaker is moved to the outside area of the surgery, and the button is pressed again to open the upper part and the lower part of the rectangular tube section, the broken nail cap can naturally fall off from the gap, and then the next breaking operation can be performed.

Claims

1. A long-arm nail breaker, characterized in that, The device includes a sleeve and a core tube. The core tube includes a circular tube segment and a rectangular tube segment. The circular tube segment of the core tube is nested inside the sleeve and can slide along the axial direction of the sleeve. The rectangular tube segment of the core tube is exposed outside the sleeve. A slit is formed on the rectangular tube segment of the core tube, which extends a certain length toward the circular tube segment. The rectangular tube segment can be opened into two parts with the slit as the interface.

2. The long-arm nail breaker according to claim 1, characterized in that, The circular pipe segment and the rectangular pipe segment are connected by a curved transition section, and the gap passes through the transition section. The axis of the circular pipe segment is parallel to but does not coincide with the axis of the rectangular pipe segment.

3. A long-arm nail breaker according to claim 1, characterized in that, The breaker also includes a button with a through hole. The circular tube segment of the core tube passes through the through hole and is fixedly connected to the button. The button is sleeved inside one end of the sleeve, and a spring is provided in the space between the button and the sleeve.

4. A long-arm nail breaker according to claim 1, characterized in that, A limiting structure is provided between the two open parts of the rectangular tube segment.

5. A long-arm nail breaker according to claim 4, characterized in that, The limiting structure is an isosceles trapezoid, and the gap surrounds the two sides of the isosceles trapezoid and a longer base.

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