Nail supporting tool headTechnical Field
The utility model belongs to the field of orthodontic tools, and particularly relates to a fixing tool head of an orthodontic anchorage nail.
Background
As the micro-screw implant is an anchorage with the characteristics of stability, comfort and the like, the micro-screw implant can replace the traditional anchorage, plays a strong anchorage function in adult dentition defect patients, and expands the indications of clinical correction. The surgical method is specifically adopted to implant the implant nails into the alveolar bone as the anchorage to complete the whole correction process in cooperation with the fixation correction technology. The method has the advantages of stable anchorage effect, simple operation and shortened orthodontic treatment course. The orthodontics uses this technique for an increasing number of patients.
As the cap part of the anchorage nail is a polygonal body such as a triangle, a hexagon or a quadrangle, the prior polygonal positioning screwdriver tools such as a triangle, a hexagon or a quadrangle are adopted when the anchorage nail is implanted into the preset positions such as the alveolar bone. Because the existing multilateral positioning screwdriver adopts a fixed inner multilateral head, the size of the inner multilateral head is slightly larger than that of the branch resistant screw cap part in order to sleeve the branch resistant screw cap part. Therefore, when the anchorage nail tool head is adopted, the anchorage nails cannot be stably positioned, so that when the anchorage nails are implanted, the anchorage nails are easily deviated in implantation or the situation of inaccurate implantation positions occurs.
Aiming at the problems, chinese patent No. CN201320643735.7, named as an anti-nailing tool, discloses an anti-nailing tool head with a sleeve. However, the need to screw the sleeve in a specific operation increases the operation time of a doctor, and the operation is not convenient.
Disclosure of Invention
Aiming at the problems in the background technology, the utility model provides the tool head for fixing the anchorage nails, which can stably position the anchorage nails on the tool head and is convenient to operate.
The technical scheme adopted by the utility model is as follows: the anti-nailing tool head comprises a connecting rod, wherein one end of the connecting rod is connected with a handle, and the other end of the connecting rod is provided with a clamping head; an inner polygonal groove and a cylindrical groove which are sequentially communicated are formed in the end face of the tail end of the clamping head;
the side wall of the clamping head is also provided with a strip-shaped groove, one end of the strip-shaped groove is positioned at the joint of the inner polygonal groove and the cylindrical groove, the bottom surface of one end of the strip-shaped groove is also provided with a through hole communicated with the inner polygonal groove and the cylindrical groove, and a sphere is also arranged in the through hole;
a spring plate is further arranged in the strip-shaped groove, one end, away from the ball, of the spring plate is welded in the groove, and the other end of the spring plate is propped against the outside of the ball; and the sphere propped by the other end of the elastic sheet is partially protruded and exposed at the joint of the inner polygonal groove and the cylindrical groove.
The polygonal groove is matched with the anti-nailing nut part, and the cylindrical groove is used for accommodating the neck part and the head part of the anti-nailing; and the aperture of the inner polygonal groove is larger than that of the cylindrical groove.
The elastic sheet is of a structure with thick two ends and thin middle; and one end of the elastic sheet far away from the sphere is thicker than one end propped against the outside of the sphere.
According to the anchorage nail tool head, the strip-shaped groove is arranged along the direction parallel to the central axis of the clamping head.
According to the anchorage nailing tool, the inner polygonal groove is an inner triangle, an inner quadrangle or an inner hexagon.
The utility model has the following beneficial effects: because the side wall of the clamping head of the anchorage nailing tool is provided with the elastic sheet, and the joint of the polygonal groove and the cylindrical groove in the clamping head is provided with the limit sphere matched with the elastic sheet. Therefore, when the anchorage nails are inserted into the clamping heads, the limiting sphere can stably limit the anchorage nails on the clamping heads, and the anchorage nails are shifted in the planting process. Meanwhile, the operation is very convenient, and the operation is just to push in and pull out with force, which is the same as the operation mode of a common screw tool, but the stable positioning of the anchorage nail is greatly improved.
Drawings
FIG. 1 is a schematic view of the construction of an embodiment 1 of the present utility model;
FIG. 1a is a schematic diagram of a spring structure of a stapling tool head;
FIG. 2 is a schematic view of the construction of the nail gun of FIG. 1 without the spring and ball;
FIG. 3 is a front view of the drawing;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is an enlarged view at B of FIG. 4;
FIG. 6 is a schematic view of the assembly of the embodiment 1 of the buttress pin tool head and the buttress pin;
FIG. 7 is a schematic view of the structure of FIG. 6 after assembly;
FIG. 8 is a cross-sectional view A-A of FIG. 7;
FIG. 9 is a schematic view of the construction of the nail head of embodiment 2 of the present utility model;
fig. 10 is a schematic structural view of an anchorage pin tool head in embodiment 3 of the present utility model.
Detailed Description
Example 1
As shown in fig. 1, an anchorage nail tool head shown in embodiment 1 comprises a connecting rod 2, one end of the connecting rod 2 is connected with a handle through an insertion rod 1, and the other end is provided with a clamping head 3. As shown in fig. 2, 3, 4 and 5, the distal end face 31 of the clamp head 3 is provided with an inner polygonal groove 5 and a cylindrical groove 7 which are sequentially penetrated. The aperture of the inner polygonal groove 5 is larger than the aperture of the cylindrical groove 7. As shown in fig. 6, a boss 8 is arranged at the transition between the inner polygonal groove 5 and the cylindrical groove 7, and the boss is a limiting surface after the anchorage pin is inserted. As shown in fig. 6, the staple 9 has a nut portion e, a neck portion d, and a head portion c. As shown in fig. 7 and 8, the polygonal groove 5 is engaged with the cap portion e of the anchor, and the cylindrical groove is used to receive the neck portion d and the head portion c of the anchor. The inner polygonal groove 5 of the present embodiment is a trilateral groove.
As shown in fig. 3, 4 and 5, a long strip-shaped groove 6 is further provided on the side wall of the clamping head 3, the long strip-shaped groove 6 is disposed along the direction parallel to the central axis of the clamping head 3, one end of the long strip-shaped groove 6 is close to the joint of the inner polygonal groove 5 and the cylindrical groove 7, a through hole 10 penetrating the inner polygonal groove 5 and the cylindrical groove 7 is further provided on the bottom surface of the end of the long strip-shaped groove 6, and the through hole 10 is used for setting a sphere 11.
As shown in fig. 1 and 1a, a spring plate 4 is further disposed in the elongated groove 6. As shown in fig. 1a, the elastic sheet 4 has a structure with two thick ends, namely one end 41 and the other end 42, and a middle end 43. One end 42 of the elastic sheet 4 far away from the sphere 10 is welded in the strip-shaped groove 6, and the other end 41 of the elastic sheet 4 is propped against the outside of the sphere 10; and the sphere 10 propped by the other end 41 of the elastic sheet 4 is partially protruded and exposed at the joint of the inner polygonal groove 5 and the cylindrical groove 7. And the end 42 of the spring plate 4 far away from the sphere is thicker than the end 41 propped outside the sphere. Such a construction makes it possible for the spring 4 to have a better elasticity and to reduce the overall weight of the tool head. Meanwhile, the welded end 42 is thicker, so that the welding strength can be enhanced, and the spring plate 4 is prevented from falling off.
When the support nail 9 is inserted into the clamping head 3, the head c of the support nail firstly presses the ball 10 along with the pushing of the support nail, and the head c of the support nail slides into the cylindrical groove 7 under the action of the elastic force of the elastic sheet 4 to drive the neck d of the support nail to be located in the cylindrical groove 7 together. And the supporting nail nut part e is limited in the inner polygonal groove 5 by the limiting surface 8. Because a gap is formed between the supporting nail cap e and the head c, the part of the partially-protruding sphere 10 which is arranged at the other end 41 of the elastic sheet 4 in a propping way is just clamped in the gap, so that the supporting nail is stably positioned. After the anchorage nails are planted, the heads c of the anchorage nails can be extruded by the spheres 10 to slide out of the clamping heads 3 only by pulling out the tool heads, so that the operation is very convenient.
Example 2
The other structure of this embodiment is the same as that of embodiment 1, except that the inner polygonal groove 5 of this embodiment is a quadrangular groove.
Example 3
The other structure of this embodiment is the same as that of embodiment 1, except that the inner polygonal groove 5 of this embodiment is a hexagonal groove.
The foregoing is merely illustrative of specific embodiments of the utility model, and the scope of the utility model is not limited thereto, but is intended to cover any variations or alternatives not covered by the inventive subject matter, and therefore, the scope of the utility model is defined by the appended claims.