A wire sliding titanium nail extractor for oral surgery

Abstract

The utility model discloses a kind of slip wire titanium nail extractors for oral surgery, including shell, knocking device, rotating device and tool bit, knocking device includes power assembly and rotating drive component, power assembly includes knocking hammer and the first elastic member being connected with shell and knocking hammer respectively at both ends, rotating drive component includes guide rail and stress driving piece being slidably arranged on guide rail;Rotating device includes external knob and the internal knob being fixedly connected with external knob, internal knob can be rotated tool bit under the action of knocking device.The slip wire titanium nail extractor of the utility model, by exerting knocking force to knocking hammer, knocking hammer is under the action of external force and knocks stress driving piece, stress driving piece moves downward along guide rail and acts on internal knob under the action of knocking force, internal knob rotates a certain angle under the action of stress driving piece, and then drive tool bit located at its bottom to rotate, to realize the extraction operation to slip wire titanium nail.

Description

Technical Field

[0001] This utility model relates to the field of oral surgical tools, specifically to a stripper for removing titanium screws in oral surgery. Background Technology

[0002] Currently, titanium plates and screws are widely used in oral and maxillofacial fracture surgery and orthognathic surgery. With the widespread use of titanium screws, a common problem during plate removal is slippage, making removal difficult. Clinically, two methods are typically used to address slippage: the first method involves using a powered system to grind away the titanium plate, cutting it off, and then forcefully unscrewing it with a pin; the second method involves grinding away the surrounding bone tissue to reduce resistance. Both methods are time-consuming, labor-intensive, and relatively forceful, potentially causing unnecessary injury to the patient.

[0003] A search revealed that utility model patent application CN201820154154.X discloses a stripped screw extractor, which includes a base, a screw extractor rotatably mounted on the base, a puller connected to the base for tightening the bone, a limiting member disposed on the screw extractor, and an elastic member disposed between the limiting member and the base. The base has a through hole for accommodating the screw extractor. Although this extractor can remove stripped screws, the diameter and size of orthopedic titanium screws far exceed those of titanium screws used in oral and maxillofacial surgery. Therefore, this stripped screw extractor cannot be applied to oral and maxillofacial surgery. Utility Model Content

[0004] The purpose of this invention is to provide a stripped titanium screw remover for oral surgery, which can be used not only for removing stripped titanium screws in oral surgery, but also for routine removal of titanium screws.

[0005] To achieve the above objectives, this utility model provides a stripped wire titanium screw removal device for oral surgery, comprising a housing, a striking device, a rotating device, and a blade. The striking device includes a power component and a rotation drive component disposed within the housing. The power component includes a first elastic element and a striking hammer. The upper end of the first elastic element is fixedly connected to the inner top wall of the housing, and the lower end of the first elastic element is fixedly connected to the striking hammer. The rotation drive component includes a force-receiving drive component and a guide rail. The guide rail is disposed below the striking hammer and is axially disposed on the inner side wall of the housing. The force-receiving drive component is slidably disposed on the guide rail. The rotating device includes an outer knob and an inner knob. The outer knob is movably sleeved on the lower outer side of the housing, and the inner knob is disposed below the housing and fixedly connected to the outer knob. The top of the inner knob is provided with a second elastic element for buffering and resetting the force-receiving drive component. The blade is disposed at the bottom of the inner knob, and the inner knob can drive the blade to rotate a certain angle under the action of the striking device.

[0006] Furthermore, a first helical gear is provided at the bottom of the force-driven component, and a second helical gear corresponding to the first helical gear is provided at the top of the internal knob. A mounting groove for installing the second elastic component is provided on the outer side of the second helical gear.

[0007] Furthermore, the second elastic element is a plurality of small compression springs symmetrically mounted around the second helical gear, or the second elastic element is a large compression spring sleeved on the second helical gear; the free length of the small compression springs and the large compression springs is greater than the tooth height of the second helical gear.

[0008] Furthermore, a mounting boss is provided circumferentially on the lower outer side of the housing, and a first receiving groove is provided on the upper inner sidewall of the external knob for cooperating with the mounting boss; the external knob is rotatably and vertically movable at the bottom of the housing via the mounting boss and the first receiving groove.

[0009] Furthermore, the height of the first receiving groove is greater than the height of the mounting boss, and the height difference between the first receiving groove and the mounting boss is greater than the tooth height of the first helical gear.

[0010] Furthermore, the bottom of the external knob is provided with an upwardly recessed second receiving groove, which together with the internal knob forms a hanging lug for hanging a blade head protective sleeve; the blade head protective sleeve is disposed on the outside of the blade head.

[0011] Furthermore, the top of the force-driven component is provided with a striking part of a hemispherical or semi-ellipsoidal structure.

[0012] Furthermore, the blade can be interchangeably connected to the internal knob, and the blade is in the shape of a straight line, a cross, or a star.

[0013] Furthermore, the side wall of the housing is provided with an operating port for applying an initial striking force to the hammer.

[0014] Furthermore, the external knob and the internal knob are integrated into one unit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) A translucent titanium screw remover for oral surgery according to this utility model includes a housing, a striking device, a rotating device, and a blade. The striking device includes a power component and a rotating drive component. The power component includes a striking hammer and a first elastic element connected to the housing and the striking hammer at both ends respectively. The rotating drive component includes a guide rail and a force-receiving drive element slidably disposed on the guide rail. The rotating device includes an external knob and an internal knob fixedly connected to the external knob. The internal knob can drive the blade to rotate under the action of the striking device. In this translucent titanium screw remover, by applying an external striking force to the striking hammer, the striking hammer strikes the force-receiving drive element under the action of the external force. Under the action of the striking force, the force-receiving drive element moves downward along the guide rail and acts on the internal knob. That is, the first helical gear of the force-receiving drive element strikes the second helical gear of the internal knob. The internal knob rotates a certain angle under the action of the force-receiving drive element, thereby driving the blade located at its bottom to rotate.

[0017] (2) The present invention provides a translucent titanium screw remover for oral surgery. The force applied to the struck part can be controlled by adjusting the distance between the striking hammer and the struck part. The second helical gear of the internal knob divides the downward vertical force transmitted by the force-driven component into two forces: a downward vertical force and a rotational force. The second elastic element allows the force-driven component to automatically rebound after one strike, preparing for the next strike, thus achieving continuous striking. The translucent titanium screw remover of the present invention has a simple structure and reasonable design. It can be used not only for the removal of translucent titanium screws in oral surgery but also for the routine removal of titanium screws.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1This is a schematic diagram of the structure of a preferred embodiment of the present invention for removing slipwire titanium screws in oral surgery (for ease of explanation). Figure 1 The internal structure of the stripper titanium nail remover is shown, along with a cross-sectional view of a portion of the device.

[0021] Figure 2 This is a structural schematic diagram of the force-driven component in this utility model;

[0022] Figure 3 This is a schematic diagram of the internal knob in this utility model;

[0023] Figure 4 This is a schematic diagram of the knob device in this utility model;

[0024] Figure 5 yes Figure 4 A schematic diagram of the longitudinal cross-sectional structure of the central knob device;

[0025] Figure 6 This is a schematic diagram of the shell structure in this utility model;

[0026] Wherein, 1-housing; 1.1-mounting boss; 1.2-operating port; 2-first elastic element; 3-hammer; 4-force-receiving driving element; 4a-impacted part; 4.1-first helical gear; 5-guide rail; 6-external knob; 6.1-first receiving groove; 6.2-second receiving groove; 7-internal knob; 7.1-second helical gear; 7.2-mounting groove; 8-cutting head; 9-cutting head protective sleeve; 10-second elastic element. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] Please see Figure 1 and Figure 6 One embodiment of this utility model provides a stripped wire titanium screw removal device for oral surgery, which includes a housing 1, a striking device, a rotating device, and a cutting head 8; the specific structure is as follows:

[0029] The housing 1 is a cylindrical structure with an open bottom. A mounting boss 1.1 is circumferentially provided on the lower outer side of the housing 1, and an operating port 1.2 is provided on the side wall of the housing 1. The striking device includes a power component and a rotary drive component housed within the housing 1. The power component includes a first elastic element 2 and a striking hammer 3. The upper end of the first elastic element 2 is fixedly connected to the inner top wall of the housing 1, and the lower end of the first elastic element 2 is fixedly connected to the striking hammer 3. The rotary drive component includes a force-receiving drive element 4 and two guide rails 5. The two guide rails 5 are symmetrically arranged on the inner side wall of the housing and below the striking hammer 3, and are arranged along the axial direction of the housing 1. The force-receiving drive element 4 is slidably mounted on the guide rails 5. The rotary device includes an integrally formed external knob 6 and an internal knob 7. The external knob 6 is movably sleeved on the lower outer side of the housing 1, and the internal knob 7 is located below the housing 1. A cutting head 8 is located at the bottom of the internal knob 7. The internal knob 7 can rotate a certain angle while driving the cutting head 8 downward under the action of the striking device. In this structure, an initial downward striking force is applied to the hammer 3 through the operating port 1.2, causing the hammer 3 to strike the force-receiving drive component 4. Under the action of the striking force, the force-receiving drive component 4 moves downward along the guide rail 5 and acts on the internal knob 7. The internal knob 7 rotates a certain angle under the action of the striking force of the force-receiving drive component 4, thereby driving the cutter head 8 located at its bottom to rotate. The top of the force-receiving drive component 4 is provided with a hemispherical or semi-ellipsoidal striking part 4a; during operation, the hammer 3 acts on the striking part 4a. Depending on the actual situation, the magnitude of the force on the striking part 4a can be controlled by adjusting the distance between the hammer 3 and the striking part 4a.

[0030] Combination Figure 2 and Figure 5The bottom of the force-driven component 4 is provided with a first helical gear 4.1, and the top of the internal knob 7 is provided with a second helical gear 7.1 corresponding to the first helical gear 4.1; the top of the internal knob 7 and the outside of the second helical gear 7.1 are provided with a mounting groove 7.2, which can be formed by the internal knob 7, the external knob 6 and the second helical gear 7.1. A second elastic element 10 for buffering and resetting the force-driven component 4 is provided in the mounting groove 7.2. The second elastic element 10 consists of multiple small compression springs symmetrically mounted around the second helical gear 7.1, or the second elastic element 10 is a large compression spring sleeved on the second helical gear 7.1. Regardless of whether the second elastic element 10 is a small or large compression spring, its free length must be greater than the tooth height of the second helical gear 7.1. This allows the impact force applied by the hammer 3 to the force-driven component 4 to be transmitted to the internal knob 7. Under the buffering effect of the second elastic element 10, the force-driven component 4 can automatically rebound after completing one strike, preparing for the next strike, thereby achieving continuous striking. In this structure, the force-driven component moves downward along the guide rail under the striking force of the hammer and acts on the internal knob. At this time, the first helical gear of the force-driven component strikes the second helical gear of the internal knob. The second helical gear divides the vertically downward force transmitted by the first helical gear into two forces in two directions: vertically downward and rotational. That is, the force-driven component gives the cutter head a vertically downward force and a rotational force, so that the stripped titanium nail is rotated at a certain angle by the rotational force of the cutter head. After repeating this process multiple times, the stripped titanium nail can finally be removed.

[0031] In one specific embodiment, the upper inner sidewall of the external knob 6 is provided with a first receiving groove 6.1 for engaging with the mounting boss 1.1; the external knob 6 is rotatably and vertically movable at the bottom of the housing 1 via the mounting boss 1.1 and the first receiving groove 6.1. Specifically, the height of the first receiving groove 6.1 is greater than the height of the mounting boss 1.1, and the height difference between the first receiving groove 6.1 and the mounting boss 1.1 is greater than the tooth height of the first helical gear 4.1. It should be noted that the height here refers to the height along the axial direction of the housing 1. This structure is designed to prevent the first helical gear 4.1 from being blocked by the rotating device (first receiving groove) during its descent, thereby affecting the purpose of this invention.

[0032] In one specific embodiment, the bottom of the outer knob 6 is provided with an upwardly recessed second receiving groove 6.2, which together with the inner knob 7 forms a hanging lug for hanging the cutter head protective sleeve 9; the cutter head protective sleeve 9 is located on the outside of the cutter head 8.

[0033] In one specific embodiment, the cutter head 8 is replaceably connected to the internal knob 7, and the cutter head 8 is in the shape of a straight line, a cross, or a star. When the cutter head becomes worn or needs to be replaced with another type of cutter head, it can be easily replaced.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A transforated titanium screw remover for oral surgery, characterized in that, The device includes a housing, a striking device, a rotating device, and a cutting head. The striking device includes a power component and a rotation drive component disposed within the housing. The power component includes a first elastic element and a striking hammer. The upper end of the first elastic element is fixedly connected to the inner top wall of the housing, and the lower end of the first elastic element is fixedly connected to the striking hammer. The rotation drive component includes a force-receiving drive component and a guide rail. The guide rail is disposed below the striking hammer and is axially disposed on the inner side wall of the housing. The force-receiving drive component is slidably disposed on the guide rail. The rotating device includes an outer knob and an inner knob. The outer knob is movably sleeved on the lower outer side of the housing. The inner knob is disposed below the housing and fixedly connected to the outer knob. The top of the inner knob is provided with a second elastic element for buffering and resetting the force-receiving drive component. The cutting head is disposed at the bottom of the inner knob. The inner knob can drive the cutting head to rotate a certain angle under the action of the striking device.

2. The stripped titanium nail remover according to claim 1, characterized in that, The bottom of the force-driven component is provided with a first helical gear, the top of the internal knob is provided with a second helical gear corresponding to the first helical gear, and the outer side of the second helical gear is provided with a mounting groove for installing the second elastic component.

3. The stripped wire titanium nail remover according to claim 2, characterized in that, The second elastic element is a plurality of small compression springs symmetrically mounted around the second helical gear, or the second elastic element is a large compression spring sleeved on the second helical gear; the free length of the small compression springs and the large compression springs is greater than the tooth height of the second helical gear.

4. The stripped-wire titanium nail remover according to claim 2, characterized in that, A mounting boss is provided on the lower outer circumferential side of the housing, and a first receiving groove is provided on the upper inner sidewall of the external knob for cooperating with the mounting boss; the external knob is rotatably and vertically movable at the bottom of the housing via the mounting boss and the first receiving groove.

5. The stripped-wire titanium nail remover according to claim 4, characterized in that, The height of the first receiving groove is greater than the height of the mounting boss, and the height difference between the first receiving groove and the mounting boss is greater than the tooth height of the first helical gear.

6. The stripped-wire titanium nail remover according to claim 4, characterized in that, The bottom of the external knob is provided with an upwardly recessed second receiving groove, which together with the internal knob forms a hanging lug for hanging a blade head protective sleeve; the blade head protective sleeve is provided on the outside of the blade head.

7. The stripped titanium nail remover according to claim 1, characterized in that, The top of the force-driven component is provided with a striking part of a hemispherical or semi-ellipsoidal structure.

8. The stripped titanium nail remover according to claim 1, characterized in that, The blade can be interchangeably connected to the internal knob, and the blade is in the shape of a straight line, a cross, or a star.

9. The stripped titanium nail remover according to claim 1, characterized in that, An operating port for applying an initial striking force to the hammer is provided on the side wall of the housing.

10. The stripped-wire titanium nail remover according to claim 1, characterized in that, The external knob and the internal knob are integrated into one unit.

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