Distraction forceps

Abstract

The utility model provides a pair of distraction forceps, which comprises a forceps body and a forceps mouth, the forceps body comprises two forceps handles which are hinged through a pin shaft, and the two forceps handles are respectively used for adjusting the distance between the two forceps handles through two elastic sheets which are clamped with each other; the width of the two clamp mouths is 3 mm, supporting rods are arranged on the opposite sides of the two clamp mouths respectively, each supporting rod is a cylinder with the diameter of 3.5 mm, and the length of each cylinder is 10 mm; any one of the clamp mouths is provided with an open slot, the depth of the open slot is 0.4 mm, the open slots are located between the supporting rod and the pin shaft, the open slots are close to one side of the supporting rod, and the two open slots are located on the opposite sides of the two clamp mouths respectively. According to the utility model, the two elastic sheets are adopted to adjust the distance between the plier handles; a cylindrical supporting rod is adopted and used for opening the atlantoaxial space or the space between the occipital bone and the axis after a screw is placed, and therefore the purpose of resetting / releasing is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pair of spreading forceps. Background Art

[0002] Orthopedic distraction forceps are commonly used as medical tools in orthopedic surgery, and are widely used in the process of correcting fractures, reconstructing bones or performing spinal surgery. There are the following technical defects: Currently, there is no specific distraction forceps for distracting the atlantoaxial space or the space between the occipital bone and the axis after screw placement.

[0003] Therefore, how to design a distraction forceps for distracting the atlantoaxial space or the space between the occipital bone and the axis after screw placement has become a problem that needs to be solved urgently. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a spreading pliers to solve at least one of the above technical problems.

[0005] The technical scheme of the utility model is: a kind of spreading pliers, comprising a pliers body and a pliers mouth, the pliers body comprising two pliers handles hinged by a pin shaft, the inner sides of the two pliers handles are respectively provided with spring plates, one end of the two spring plates are respectively fixed to the two pliers handles, the two spring plates correspond to the first spring plate and the second spring plate respectively, the other end of the second spring plate is fixed to the pliers handle where the first spring plate is located, the second spring plate is provided with dozens of saw teeth arranged at intervals, the other end of the first spring plate is clamped with the saw teeth of the second spring plate; the two pliers mouths are arranged in a curved manner, the angle between the pliers mouths and the pliers body is an obtuse angle, the two pliers mouths are respectively provided with support rods on the opposite sides, and the support rods are cylindrical; an opening groove is provided on any one of the pliers mouths, the opening groove is located between the support rod and the pin shaft, the opening groove is close to one side of the support rod, and the two opening grooves are respectively located on the opposite sides of the two pliers mouths.

[0006] The utility model adopts the other end of the first spring piece to be clamped with the serrations of the second spring piece to apply an opening elastic force to the two clamp handles; a cylindrical support rod is arranged at the end of the clamp mouth away from the clamp body, and the surgical area is expanded by the inserted screws, so as to achieve the purpose of reduction / loosening, etc., and is suitable for expanding the atlantoaxial space or the space between the occipital bone and the axis after screw placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the front view of the installation structure of the utility model.

[0008] Figure 2 for Figure 1 A partial enlarged view of .

[0009] Figure 3 It is a top view of the installation structure of the utility model.

[0010] In the figure: 1. pliers body; 2. first spring sheet; 3. second spring sheet; 4. support rod; 5. columnar boss; 6. opening slot; 101. holder; 301. bump. DETAILED DESCRIPTION

[0011] The utility model is further described below in conjunction with the accompanying drawings.

[0012] See also Figure 1-3 The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0013] Embodiment 1: A spreading forceps, referring to Figure 1 , Figure 2 , including a pliers body 1 and a pliers mouth. The pliers body 1 includes two pliers handles hinged by a pin shaft. The inner sides of the two pliers handles are respectively provided with springs, one end of the two springs are respectively fixed to the two pliers handles, the two springs correspond to the first spring sheet 2 and the second spring sheet 3 respectively, the other end of the second spring sheet 3 is fixed to the pliers handle where the first spring sheet 2 is located, and the second spring sheet 3 is provided with dozens of saw teeth arranged at intervals, and the other end of the first spring sheet 2 is engaged with the saw teeth of the second spring sheet 3; the two pliers mouths are arranged in a curved manner, and the angle between the pliers mouths and the pliers body 1 is an obtuse angle. Support rods 4 are respectively provided on the opposite sides of the two pliers mouths, and the support rods 4 are cylindrical; an opening groove 6 is provided on any one of the pliers mouths, and the opening groove 6 is located between the support rod 4 and the pin shaft, the opening groove 6 is close to one side of the support rod 4, and the two opening grooves 6 are respectively located on the opposite sides of the two pliers mouths; the width of any one of the pliers mouths is 3mm; the specifications of the support rod 4 are a diameter of 3.5mm and a length of 10mm; the depth of the opening groove 6 is 0.4mm. The utility model adopts the other end of the first spring piece to be clamped with the serrations of the second spring piece to apply an opening elastic force to the two clamp handles; a cylindrical support rod is arranged at the end of the clamp mouth away from the clamp body, and the surgical area is expanded by the inserted screws, so as to achieve the purpose of reduction / loosening, etc., and is suitable for expanding the atlantoaxial space or the space between the occipital bone and the axis after screw placement.

[0014] Embodiment 2: Based on Embodiment 1, the two clamp handles correspond to the first clamp handle and the second clamp handle respectively, the end of the first clamp handle away from the pin is hinged to the first spring sheet 2, and the end of the first clamp handle close to the pin is hinged to the other end of the second spring sheet 3. The utility model adopts the end of the first clamp handle away from the pin to be hinged to the first spring sheet to limit one end of the first spring sheet; adopts the end of the first clamp handle close to the pin to be hinged to the other end of the second spring sheet to limit the other end of the second spring sheet.

[0015] Embodiment 3: Based on Embodiment 2, a clamping seat 101 is provided on the inner side of the second clamp handle, the clamping seat 101 is hinged to the second clamp handle, a first rectangular through hole is provided on the clamping seat 101, one end of the second spring piece 3 passes through the first rectangular through hole, and the sawtooth of the second spring piece 3 can be clamped on the clamping seat 101. The utility model adopts a clamping seat hinged to the second clamp handle, the clamping seat can rotate around the hinge point, one end of the second spring piece passes through the first rectangular through hole of the clamping seat, and the sawtooth that can pass through limits one end of the second spring piece.

[0016] Embodiment 4: Based on Embodiment 2, the first spring piece 2 is an L-shaped structure, the angle of the L-shaped structure is an obtuse angle, and the L-shaped structure is composed of two arc segments, one arc segment is hinged to the first clamp handle, and the outer arc surface of the arc segment is close to the first clamp handle; the inner arc surface of the other arc segment is close to the first clamp handle. The utility model uses two arc segments to form the first spring piece, one arc segment is hinged to the first clamp handle, and limits one arc segment; the inner arc surface of the other arc segment is close to the first clamp handle.

[0017] Embodiment 5: Based on Embodiment 4, a second rectangular through hole is provided on the other arc segment, one end of the second spring piece 3 passes through the second rectangular through hole, and the other end of the second spring piece 3 is riveted to the first clamp handle. The utility model adopts one end of the second spring piece passing through the second rectangular through hole, and the other end of the second spring piece is riveted to the first clamp handle to limit the other end of the second spring piece.

[0018] Embodiment 6: Based on embodiment 5, the other end of the second spring piece 3 is a convex block 301, and a cylindrical block is provided on the side of the convex block 301 close to the pin, and the cylindrical block fits with the inner arc surface of another arc segment of the L-shaped structure. The utility model uses the cylindrical block to fit with the inner arc surface of another arc segment of the L-shaped structure to limit the other end of the second spring piece.

[0019] Embodiment 7: Based on Embodiment 1, Figure 3 The two pliers handles are provided with dozens of columnar bosses 5 arranged at intervals on the end faces of the two pliers handles away from each other, and the cross section of the columnar bosses 5 is semicircular. The utility model adopts the arrangement of columnar bosses on the end faces of the two pliers handles away from each other, which can increase the friction between the pliers handles and the human hand, and play an anti-slip role when in use.

[0020] Embodiment 8: Based on the embodiment 1, the jaw surfaces where the two support rods 4 are located are both circular, and the support rod 4 is located at the center of the circle.

[0021] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A spreading pliers, comprising a pliers body (1) and a pliers mouth, wherein the pliers body (1) comprises two pliers handles hingedly connected by a pin shaft, wherein spring plates are respectively arranged on the inner sides of the two pliers handles, wherein one end of the two spring plates is respectively fixed to the two pliers handles, wherein the two spring plates correspond to a first spring plate (2) and a second spring plate (3), wherein the other end of the second spring plate (3) is fixed to the pliers handle where the first spring plate (2) is located, wherein the second spring plate (3) is provided with dozens of saw teeth arranged at intervals, wherein the other end of the first spring plate (2) is engaged with the saw teeth of the second spring plate (3); wherein the two pliers mouths are arranged in a curved manner, wherein the angle between the pliers mouths and the pliers body (1) is an obtuse angle, wherein: Support rods (4) are respectively arranged on the opposite sides of the two pliers jaws, and the support rods (4) are cylindrical; an opening groove (6) is arranged on any one of the pliers jaws, and the opening groove (6) is located between the support rod (4) and the pin shaft, and the opening groove (6) is close to one side of the support rod (4), and the two opening grooves (6) are respectively located on the opposite sides of the two pliers jaws.

2. A spreading pliers according to claim 1, characterized in that: The width of any one of the pliers mouths is 3 mm.

3. The spreading pliers according to claim 1, characterized in that: The specifications of the support rod (4) are 3.5 mm in diameter and 10 mm in length.

4. The spreading pliers according to claim 1, characterized in that: The depth of the opening groove (6) is 0.4 mm.

5. The spreading pliers according to claim 1, characterized in that: Dozens of columnar bosses (5) are arranged at intervals on the end surfaces of the two clamp handles that are away from each other, and the cross section of the columnar bosses (5) is semicircular.

6. The spreading pliers according to claim 1, characterized in that: The jaw surfaces where the two support rods (4) are located are both circular, and the support rods (4) are located at the center of the circles where they are located.

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