CN220158432U - Broken screw extractor - Google Patents

Abstract

The utility model relates to the technical field of dental medical appliances, and particularly discloses a broken screw extractor, which comprises: the connecting device comprises a rod body, wherein the top wall of the rod body is provided with a connecting part, the bottom wall of the rod body is provided with a groove, the groove wall of the groove is obliquely arranged, and the groove wall of the groove is provided with threads. The utility model has the advantage of improving the broken screw taking-out efficiency.

Description

Broken screw extractor

Technical Field

The utility model relates to the technical field of dental medical instruments, in particular to a broken screw extractor.

Background

The implant consists of an implant, a base and a dental crown, wherein the central screw of the base is an indispensable part for increasing the connection sealing degree between the base and the inner cavity of the implant, the central screw is jointed with the conical surface inside the base by means of the conical surface of the screw head, and downward wedge force is generated along with the stress of the central screw, so that the conical surface of the screw head is tightly jointed with the inner conical surface of the base and the outer conical surface of the base is tightly jointed with the inner conical surface of the implant. The central screw is the weakest link in the planting system, and in some special cases, breaks occur. In the current clinical work, after the central screw is broken, the tip of the dental probe is generally embedded into the threaded channel of the broken screw, and after pressure is applied, the broken screw is repeatedly tried and slowly reversed until the broken screw is unscrewed from the implant cavity. However, when the broken screw is taken out by adopting the method, the efficiency is low, and the periodontal tissue of a patient is extremely easily damaged, so that the problems of mucous membrane damage, gingival bleeding and the like are caused.

Disclosure of Invention

The utility model aims to provide a broken screw extractor, which has the advantage of improving broken screw extraction efficiency.

The technical aim of the utility model is realized by the following technical scheme:

a broken screw extractor, comprising: the connecting device comprises a rod body, wherein the top wall of the rod body is provided with a connecting part, the bottom wall of the rod body is provided with a groove, the groove wall of the groove is obliquely arranged, and the groove wall of the groove is provided with threads.

Compared with the prior art, the rod body can be arranged on the handle or an external planting mobile phone through the connecting part, the broken screw is wrapped through the groove on the bottom wall of the rod body, the broken screw is screwed through the matching of the threads arranged on the groove wall of the groove and the thread path of the broken screw, and the broken screw is taken out through the action modes of friction force, clamping force and the like, so that the taking-out efficiency of the broken screw is effectively improved, and meanwhile, the broken screw is not easy to damage a patient.

As a preferable scheme of the utility model, the connecting part comprises a limiting block, and the limiting block is provided with a positioning surface and an annular groove.

By adopting the scheme, the locating surface can provide a fulcrum for the rod body when rotating, and the annular groove can limit the rod body to be arranged on the handle or an external planting mobile phone.

As a preferable scheme of the utility model, the utility model further comprises a handle, and the rod body is detachably arranged on the handle through a connecting part.

By adopting the scheme, through the cooperation of the handle and the rod body, the manual control rod body can be rotated, and when a scene which is not suitable for planting a mobile phone is encountered, the broken screw can be manually taken out through the handle, so that the flexibility in use is effectively improved.

As a preferable scheme of the utility model, the bottom wall of the handle is provided with a mounting hole, a convex step which is attached to the positioning surface after the limiting block is inserted is arranged in the mounting hole, and the handle is provided with an opening which is communicated with the mounting hole.

By adopting the scheme, the rod body can rotate along with the handle through the cooperation of the convex steps and the positioning surfaces.

As a preferable scheme of the utility model, a spring plate is arranged at the position of the handle corresponding to the opening, the spring plate is connected with the handle, and a clamping head is arranged on the spring plate.

By adopting the scheme, the elastic sheet can provide pretightening force for the clamping head, and the clamping head is clamped into the annular groove when the limiting block is inserted into the mounting hole, so that the rod body can be limited in the mounting hole to finish mounting.

As a preferable scheme of the utility model, the outer side wall of the handle is provided with an anti-skid groove.

By adopting the scheme, the anti-skid groove is arranged on the handle, so that the friction between the handle and the fingers can be effectively lifted.

As a preferable scheme of the utility model, the included angle between the wall of the groove and the outer surface of the rod body is 3-7 degrees.

By adopting the scheme, the wall of the groove is 3-7 degrees relative to the outer surface of the rod body, so that the groove can better wrap broken screws.

The broken screw extractor has the following beneficial effects: the body of rod can be installed on handle or outside planting cell-phone through connecting portion, the cell wall slope setting of the recess of body of rod diapire to be provided with the screw on the cell wall, aim at broken screw and embolia with the recess of body of rod, make the recess wrap up broken screw, the user produces decurrent wedge when exerting force to the body of rod, the screw thread is identical completely with the silk way of broken screw, through frictional force, the mode of action such as clamping force, slowly with broken screw chucking then rotate out, the extraction efficiency of broken screw has been improved effectively, and be difficult for causing the injury to the patient.

Drawings

FIG. 1 is a schematic view of a broken screw extractor according to the present utility model;

FIG. 2 is a cross-sectional view at A-A in FIG. 1;

FIG. 3 is a schematic view of the assembly of the lever and the handle according to the present utility model;

FIG. 4 is a top view of the assembled shaft and handle of the present utility model;

FIG. 5 is a cross-sectional view at B-B in FIG. 4;

FIG. 6 is an enlarged schematic view of FIG. 5 at C;

in the figure: 1. a rod body; 2. a groove; 3. a limiting block; 31. a positioning surface; 32. an annular groove; 4. a handle; 41. a mounting hole; 42. convex steps; 43. an opening; 44. a spring plate; 45. a chuck; 5. an anti-skid slot.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present utility model, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a broken screw extractor.

Referring to fig. 1, in one embodiment of the present utility model, the broken screw extractor includes: the connecting part is arranged on the top wall of the rod body 1, a groove 2 is formed in the bottom wall of the rod body 1, the groove wall of the groove 2 is obliquely arranged, and threads are formed in the groove wall of the groove 2. The body of rod 1 can be installed on handle 4 or outside planting cell-phone through connecting portion, wraps up broken screw through recess 2 of body of rod 1 diapire, and the screw that the rethread set up on recess 2 cell wall is screwed up with the silk way cooperation of broken screw, takes out broken screw through the mode of actions such as frictional force, card holding force, has improved broken screw's extraction efficiency effectively, is difficult for causing the injury to the patient simultaneously.

Referring to fig. 2 and 5, in an embodiment, the connection portion includes a stopper 3, where the stopper 3 is provided with a positioning surface 31 and an annular groove 32, in this embodiment, the stopper 3 is integrally formed with the rod body 1, and in other embodiments, the connection between the stopper 3 and the rod body 1 may be implemented by welding, so long as the stopper 3 can be fixedly disposed on the rod body 1, and a specific connection manner between the stopper 3 and the rod body 1 is not limited herein. The locating surface 31 can provide a fulcrum for the rod body 1 when rotating, and the annular groove 32 can limit the rod body 1 to be installed on the handle 4 or an external planting mobile phone.

Referring to fig. 3 to 5, in an embodiment, the device further comprises a handle 4, and the rod 1 is detachably disposed on the handle 4 through a connection part. Through the cooperation of handle 4 and body of rod 1, can realize that manual control body of rod 1 rotates, can take out broken screw through handle 4 in order to realize manual when meetting the scene that is not applicable to the planting cell-phone, the flexibility when having improved the use effectively.

Referring to fig. 5, in an embodiment, the bottom wall of the handle 4 is provided with a mounting hole 41, a protruding step 42 that is attached to the positioning surface 31 after the stopper 3 is inserted is disposed in the mounting hole 41, in this embodiment, the protruding step 42 is integrally formed with the handle 4, in other embodiments, the protruding step 42 may be connected with the handle 4 by welding, so long as the protruding step 42 is fixedly disposed on the rod body 1, a specific connection manner between the protruding step 42 and the handle 4 is not limited, and an opening 43 is disposed on the handle 4, and the opening 43 is communicated with the mounting hole 41. By the engagement of the step 42 with the positioning surface 31, it is ensured that the rod body 1 can be rotated in association with the rotation of the handle 4.

Referring to fig. 5, in an embodiment, a spring plate 44 is disposed at a position of the handle 4 corresponding to the opening 43, the spring plate 44 is connected with the handle 4, a chuck 45 is disposed on the spring plate 44, in this embodiment, the spring plate 44, the chuck 45 and the handle 4 are integrally formed, and in other embodiments, the spring plate 44, the chuck 45 and the handle 4 are further connected by welding, so long as the chuck 45 can be fixedly mounted on the spring plate 44, and the spring plate 44 can be fixedly mounted on the handle 4, and a specific connection manner among the spring plate 44, the chuck 45 and the handle 4 is not limited. The elastic sheet 44 can provide pretightening force for the clamping head 45, and when the limiting block 3 is inserted into the mounting hole 41, the clamping head 45 is clamped into the annular groove 32, so that the rod body 1 can be limited in the mounting hole 41 to complete mounting.

Referring to fig. 2, in an embodiment, the outer side wall of the handle 4 is provided with a plurality of anti-slip grooves 5, and in this embodiment, the outer side wall of the handle 4 is provided with a plurality of anti-slip grooves 5 to form knurls. The anti-skid groove 5 is arranged on the handle 4, so that friction between the handle 4 and fingers can be effectively realized.

Referring to fig. 6, in an embodiment, the included angle between the wall of the groove 2 and the outer surface of the rod body 1 is 3-7 °, and in this embodiment, the included angle between the wall of the groove 2 and the outer surface of the rod body 1 is 5 °. The wall of the groove 2 is 3-7 degrees relative to the outer surface of the rod body 1, so that the groove 2 can better wrap broken screws.

The body of rod 1 can be installed on handle 4 or outside planting cell-phone through connecting portion, the cell wall slope setting of recess 2 of body of rod 1 diapire to be provided with the screw on the cell wall, aim at broken screw and embolia with the recess 2 of body of rod 1, make recess 2 wrap up broken screw, the user produces decurrent wedge force when exerting force to body of rod 1, the screw thread is identical with the silk way of broken screw completely, through frictional force, clamping action mode such as holding force, slowly with broken screw chucking then rotate out, broken screw's take out efficiency has been improved effectively, and be difficult for causing the injury to the patient.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (7)

1. A broken screw extractor, comprising: the connecting device comprises a rod body, wherein the top wall of the rod body is provided with a connecting part, the bottom wall of the rod body is provided with a groove, the groove wall of the groove is obliquely arranged, and the groove wall of the groove is provided with threads.

2. The broken screw extractor according to claim 1, wherein: the connecting portion comprises a limiting block, and the limiting block is provided with a positioning surface and an annular groove.

3. The broken screw extractor according to claim 2, wherein: the handle is further included, and the rod body is detachably arranged on the handle through the connecting part.

4. A broken screw extractor according to claim 3, wherein: the bottom wall of the handle is provided with a mounting hole, a convex step which is attached to the positioning surface after the limiting block is inserted is arranged in the mounting hole, an opening is formed in the handle, and the opening is communicated with the mounting hole.

5. The broken screw extractor according to claim 4, wherein: the handle corresponds the opening part is provided with the shell fragment, the shell fragment with the handle is connected, be provided with the dop on the shell fragment.

6. A broken screw extractor according to claim 3, wherein: the outer side wall of the handle is provided with an anti-skid groove.

7. The broken screw extractor according to claim 1, wherein: the included angle between the wall of the groove and the outer surface of the rod body is 3-7 degrees.