CN220735515U - Dental root canal treatment handpiece - Google Patents

Abstract

The utility model discloses a dental root canal therapy handpiece, which comprises a dental handpiece body and a power supply module, wherein the dental handpiece body comprises: the root canal file comprises a machine body shell, a root canal file, a conductive component and an insulating component, wherein the machine body shell is provided with a containing cavity, and an input port and an output port which are respectively communicated with two opposite ends of the containing cavity; one end of the root canal file is arranged in the output port, and the other end of the root canal file is exposed outside; a conductive assembly extending from the input port through the receiving cavity to the file for transferring current from the power module to the file, the conductive assembly being spaced from the body housing; the insulating component is arranged between the conductive component and the body shell. According to the technical scheme, the insulation component is arranged on the inner side of the machine body shell so as to block current from the conductive component to the machine body shell, and therefore operation accuracy of the dental root canal treatment mobile phone is improved.

Description

Dental root canal treatment handpiece

Technical Field

The utility model relates to the technical field of oral treatment, in particular to a dental root canal treatment handpiece.

Background

When a dentist is in treatment of teeth, the dental root canal treatment handpiece is required to measure and detect the depth of the root canal of the patient to be treated, when the dental root canal treatment handpiece is used for detection operation, a current loop is formed between the root canal file and the conductive component, so that detection signals at the root canal file are transmitted to the signal receiving end through the conductive component, detection information is formed after the detection signals are processed by a processor of the signal receiving end, and the detection information is fed back to the dentist.

However, the existing dental root canal treatment handpiece adopts a metal machine body shell, when the machine body shell contacts a human body, the current of the conductive component is likely to be conducted from the machine body shell to the human body, namely another conductive path is formed, so that the detection signal received by the signal receiving end is not accurate any more, and a dentist cannot accurately know the treatment depth of the root canal of a patient, and the root canal treatment effect is affected. In order to solve the problems, the outer side of the mobile phone is coated with an insulating layer, but the insulating layer is scratched off and rubbed off, so that an ideal insulating effect is difficult to achieve.

Disclosure of Invention

The utility model mainly aims to provide a dental root canal therapy handpiece, and an insulating assembly is arranged on the inner side of a body shell to block current from flowing from a conductive assembly to the body shell, so that the operation precision of the dental root canal therapy handpiece is improved.

In order to achieve the above object, the dental root canal treatment handpiece according to the present utility model includes a dental handpiece body and a power supply module, the dental handpiece body including: the root canal file comprises a machine body shell, a root canal file, a conductive component and an insulating component, wherein the machine body shell is provided with a containing cavity, and an input port and an output port which are respectively communicated with two opposite ends of the containing cavity; one end of the root canal file is arranged in the output port, and the other end of the root canal file is exposed outside; a conductive assembly extending from the input port through the receiving cavity to the file for transferring current from the power module to the file, the conductive assembly being spaced from the body housing; the insulating component is arranged between the conductive component and the body shell.

Optionally, along the direction from the input port to the output port, the conductive assembly is sequentially provided with an input shaft barrel, a conductive bolt and an output shaft barrel which are connected with each other, the input shaft barrel is electrically connected with the power supply module, and the output shaft barrel is electrically connected with the root canal file; the machine body shell is provided with an inclined cylinder section, the inclined cylinder section is provided with the input port, the insulating assembly comprises a first insulating part arranged on the inclined cylinder section, the first insulating part comprises a reversing shaft cylinder made of insulating materials, the reversing shaft cylinder is provided with internal threads, the input shaft cylinder is provided with external threads, and the external threads are in threaded connection with the internal threads; the reversing shaft cylinder is provided with a penetrating screw hole, and the conductive bolt is abutted to the output shaft cylinder through the penetrating screw hole.

Optionally, the first insulating part further comprises a plugging barrel, and the plugging barrel is plugged between the inclined barrel section and the input shaft barrel; the inner surface of the inclined barrel section is provided with a first limiting ring surface and a second limiting ring surface, the inner diameter of the second limiting ring surface is smaller than that of the first limiting ring surface, the second limiting ring surface is far away from the input port, the reversing shaft barrel is abutted to the second limiting ring surface, and the inserting barrel is abutted to the first limiting ring surface.

Optionally, a first avoiding recess is formed in the inner wall of the inclined cylinder section, the first avoiding recess is located between the first limiting ring surface and the second limiting ring surface, a second avoiding recess is formed in the periphery of the reversing shaft cylinder corresponding to the first avoiding recess, and a positioning channel is limited by the first avoiding recess and the second avoiding recess; the plug-in cylinder is provided with a plug-in duct communicated with the positioning channel; the dental handpiece body is also provided with a guide post, one end of the guide post is inserted into the positioning channel, and the other end of the guide post is inserted into the insertion hole channel.

Optionally, a conductive hole is formed in the head of the conductive bolt, and a conductive spring connected with the input shaft barrel is placed in the conductive hole.

Optionally, a conductive block is also arranged between the conductive spring and the input shaft barrel in an abutting manner.

Optionally, the insulation assembly further comprises a second insulation part, the second insulation part is arranged on the periphery of the output shaft barrel in a surrounding mode, the second insulation part is provided with an avoidance via hole, and the conductive bolt penetrates through the avoidance via hole and is abutted to the output shaft barrel.

Optionally, a positioning annular surface is provided on the inner periphery of the body shell, and the second insulation part is correspondingly provided with an abutting annular surface, and the abutting annular surface is used for abutting against the positioning annular surface.

Optionally, the conductive component further comprises a conductive elastic sheet group which is annularly arranged on the root canal file, the insulation component further comprises a third insulation part, the third insulation part comprises a wrapped insulation sheet which is close to the output port, the wrapped insulation sheet is annularly arranged on the periphery of the conductive elastic sheet group and is provided with an avoidance port, and the output shaft barrel is in butt joint with the conductive elastic sheet group through the avoidance port.

Optionally, the dental handpiece body further comprises a core assembly installed in the accommodating cavity, and the core assembly is in driving connection with the root canal file; the machine body shell is provided with an installation port for installing the machine core assembly relative to the output port, the third insulation part further comprises an insulation cylinder which is close to the installation port, and the insulation cylinder is arranged between the machine core assembly and the machine body shell.

According to the technical scheme, the insulation component is additionally arranged in the dental root canal therapy handpiece so that the conductive component and the handpiece shell are arranged in an insulation mode, therefore, when a dentist uses the dental root canal therapy handpiece, current generated by the power supply module can flow to the root canal file along the conductive component, the flow direction and the strength of the current are not influenced by the handpiece shell, and the operation precision of the dental root canal therapy handpiece is further ensured. In addition, the insulating assembly is arranged in the accommodating cavity of the body shell, on one hand, the insulating assembly is protected by the body shell, and the insulating assembly can stably and continuously exert the insulating effect; on the other hand, the basic shape of the machine body shell is kept in original condition, so that the hand feeling of a dentist holding the dental root canal therapy handpiece is not affected, and the using feeling of the dental root canal therapy handpiece is not affected.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a dental handpiece body in a dental root canal treatment handpiece according to an embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic view of the structure of section A-A of FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is an enlarged view at C in FIG. 4;

FIG. 7 is a schematic view of the fuselage shell of FIG. 3 in section A-A;

FIG. 8 is a schematic view of the structure of the fuselage shell of the embodiment of FIG. 1;

FIG. 9 is a schematic view of the connection between the conductive element and the file of the embodiment of FIG. 1;

fig. 10 is a schematic structural view of the reversing shaft in the embodiment of fig. 1;

FIG. 11 is an exploded view of the conductive bolt of the embodiment of FIG. 1;

fig. 12 is a schematic structural view of the wrapping type insulating sheet in fig. 1.

Reference numerals illustrate:

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 all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in abutment, or in communication between two elements or in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

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, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the 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.

Generally, the power supply module is used for providing an operation current required by the dental endodontic handpiece in operation, and the operation current is transmitted from the conductive assembly to the root canal file and then to the root canal, so as to be correspondingly transmitted to tooth tissue, liquid in the root canal, bone tissue around the root tip and the like. In the process of transmitting the operation current in the root canal, the operation current can be influenced by the impedance of different tissues, so that a signal processing system in the dental root canal treatment mobile phone can convert the operation current intensity, frequency and the like into corresponding digital signals according to the sensed operation current intensity, frequency and the like, and the digital signals are converted into visual information and then displayed on a visual terminal so as to display the information of the length, curvature and the like of the root canal of a patient, thereby helping doctors evaluate the treatment progress and making proper decisions.

In general, in order to prevent the dental root canal handpiece from being corroded by some chemical substances (such as disinfectant) in consideration of the application environment of the dental root canal handpiece, the body housing is usually a metal housing with good durability and corrosion resistance, and when a dentist holds the dental root canal handpiece, once the metal housing has a current passing through, the current flows to a conductive loop formed by a human body, the ground and the metal housing, thus affecting the detection effect of the dental root canal handpiece. Based on the above-mentioned circumstances, the dental root canal therapy handpiece needs to ensure that the conductive component and the body housing do not have conductive effects, so as to avoid the current from being partially or completely guided from the body housing to the external environment, so as to ensure the use effect of the dental root canal therapy handpiece.

The utility model provides a dental root canal treatment handpiece.

Referring to fig. 1 to 12, in an embodiment of the present utility model, a dental root canal treatment handpiece includes a handpiece body and a power supply module (not shown), the handpiece body including: the root canal file 20, the conductive assembly 30 and the insulating assembly 40 are arranged on the body shell 10, and specifically, the body shell 10 is provided with a containing cavity 11, and an input port 111 and an output port 112 which are respectively communicated with two opposite ends of the containing cavity 11; one end of the root canal file 20 is arranged in the output port 112, and the other end is exposed outside; a conductive member 30 extends from the input port 111 to the file 20 through the housing 11 for transmitting the current of the power module to the file 20, the conductive member 30 being disposed at a distance from the body housing 10; an insulating member 40 is provided between the conductive member 30 and the body case 10.

According to the technical scheme, the insulation component 40 is additionally arranged in the dental root canal therapy handpiece so as to insulate the conductive component 30 from the body shell 10, so that when a dentist uses the dental root canal therapy handpiece, current generated by the power supply module can flow to the root canal file 20 along the conductive component 30, the current flow direction and the current strength are not influenced by the body shell 10, and the operation precision of the dental root canal therapy handpiece is further ensured. Additionally, the insulation assembly 40 is installed in the accommodating cavity 11 of the body housing 10, on the one hand, the insulation assembly 40 is protected by the body housing 10, so that the insulation assembly 40 can stably and continuously exert the insulation effect; on the other hand, the basic form of the body housing 10 is maintained as it is, and the feeling of the dental root canal therapy handpiece held by the dentist, that is, the feeling of use of the dental root canal therapy handpiece is not affected.

Referring to fig. 9 in detail, in an embodiment, along the direction from the input port 111 to the output port 112, the conductive assembly 30 is sequentially provided with an input shaft barrel 31, a conductive bolt 32 and an output shaft barrel 33, wherein the input shaft barrel 31 is electrically connected with the power supply module, and the output shaft barrel 33 is electrically connected with the root canal file 20; the machine body shell 10 is provided with an inclined barrel section 17, the insulation assembly 40 comprises a first insulation part 41 arranged on the inclined barrel section 17, the first insulation part 41 comprises a reversing shaft barrel 411 made of insulation materials, the reversing shaft barrel 411 is provided with internal threads 411a, the input shaft barrel 31 is provided with external threads 311, and the external threads 311 are in threaded connection with the internal threads 411a; the reversing shaft 411 is provided with a threaded hole 411b, and the conductive bolt 32 abuts against the output shaft 33 through the threaded hole 411 b.

Specifically, the power supply module emits current, and the current flows from the input shaft barrel 31 to the conductive bolt 32 and then is conducted to the root canal file 20 through the output shaft barrel 33; the reversing shaft barrel 411 is in threaded connection with the input shaft barrel 31, and the barrel diameter of the input shaft barrel 31 is larger than that of the input shaft barrel 31, so that when the conductive assembly 30 shakes inside the machine body shell 10, the reversing shaft barrel 411 can prevent the input shaft barrel 31 and the conductive bolt 32 from contacting the machine body shell 10, further ensuring that the conductive assembly 30 and the machine body shell 10 are arranged at intervals, and avoiding current from flowing to the machine body shell 10.

It should be noted that the reversing shaft 411 has not only an insulating function but also a guiding function. Specifically, the axis of the input shaft barrel 31 and the axis of the output shaft barrel are arranged at an included angle, and the conductive bolt 32 needs to connect the input shaft barrel 31 and the output shaft barrel, so that a reversing shaft barrel is arranged, and a penetrating screw hole 411b is formed, so that the conductive bolt 32 can be stably and electrically connected with the input shaft barrel 31 and the output shaft barrel 33 through the guiding function of the penetrating screw hole 411b to the conductive bolt 32, so as to ensure the conductive function of the conductive assembly 30, and the shape of the machine body shell 10 has no interference on the connection between the guiding assemblies.

In summary, on the one hand, the reversing cylinder shaft guides the conductive bolt 32 to ensure electrical continuity between the conductive assembly 30 and the file 20; on the other hand, the reversing shaft barrel 411 is set to be an insulating member, and the reversing shaft barrel 411 is externally screwed to the input shaft barrel 31 and is provided with the conductive bolt 32 in a penetrating manner, so that the input shaft barrel 31 and the conductive bolt 32 can maintain a spaced state with the machine body shell 10, and the insulating state between the conductive assembly 30 and the machine body shell 10 is further ensured. In addition, the conductive bolt 32 is screwed into the penetrating screw hole 411b, so that the connection between the conductive bolt 32 and the reversing shaft 411 is more stable.

In other embodiments, when the dental endodontic handpiece is a dental treatment straight machine, the conductive bolt 32 is not provided, the current is transmitted from the input shaft barrel 31 and the output shaft barrel 33 to the root canal file 20, the insulating component 40 is annularly arranged on the input shaft barrel 31 and/or the output shaft barrel 33, and the outer periphery of the insulating component abuts against the inner wall of the body shell 10, so as to ensure that the conductive component 30 and the body shell 10 are arranged in a separated manner.

With continued reference to fig. 2 and 5, further, the first insulating portion 41 further includes a socket 412, and the socket 412 is inserted between the inclined section 17 and the input shaft 31; a first limiting ring surface 12 and a second limiting ring surface 13 are formed on the inner surface of the inclined barrel section 17, the inner diameter of the second limiting ring surface 13 is smaller than that of the first limiting ring surface 12, the second limiting ring surface 13 is far away from the input port 111, the reversing shaft barrel 411 is abutted against the second limiting ring surface 13, and the plugging barrel 412 is abutted against the first limiting ring surface 12. Specifically, the plug tube 412 is inserted into the accommodating chamber 11 from the input port 111, so that the input shaft tube 31 is isolated from the body housing 10 at the input port 111, thus further ensuring that the space between the input shaft and the body housing 10 is maintained; in addition, the first limiting ring surface 12 is used for limiting the installation position of the plugging tube 412, the second limiting ring surface 13 is used for limiting the installation position of the reversing shaft 411, so that the plugging tube 412 and the reversing shaft 411 can be stably installed in the accommodating cavity 11, and thus, the plugging tube 412 and the reversing shaft 411 are difficult to slide in the accommodating cavity 11 due to impact, and further, the situation that the input shaft tube 31 and/or the conductive bolt 32 contact the machine body shell 10 due to shaking is avoided, and the insulation state between the conductive assembly 30 and the machine body shell 10 is further ensured.

In other embodiments, the outer circumference of the plugging tube 412 is provided with an annular rib, and when the tube of the plugging tube 412 is inserted into the input port 111, the annular rib abuts against the periphery of the input port 111.

Based on the above embodiment, as shown in fig. 7 and 8, further, a first avoiding recess 14 is provided on the inner wall of the inclined barrel section 17, the first avoiding recess 14 is located between the first limiting ring surface 12 and the second limiting ring surface 13, a second avoiding recess 411c is provided on the outer periphery of the reversing shaft 411 corresponding to the first avoiding recess 14, and the first avoiding recess 14 and the second avoiding recess 411c limit the positioning channel 15; the plugging barrel 412 is provided with a plugging duct 412a communicated with the positioning channel 15; the dental handpiece body is further provided with a guide post 50, one end of the guide post 50 is inserted into the positioning channel 15, and the other end is inserted into the insertion hole 412a. On the one hand, the guide post 50 can increase the interaction (such as friction) among the plug tube 412, the machine body shell 10 and the reversing shaft 411 by connecting the plug hole 412a and the positioning channel 15, so as to further ensure the stable connection among the plug tube 412, the machine body shell 10 and the reversing shaft 411; on the other hand, the guiding column 50 has a certain guiding function on the plugging tube 412, specifically, when a part of the column body of the guiding column 50 is inserted into the positioning channel 15, another part of the column body exposed outside the positioning channel 15 is used for connecting the plugging duct 412a, so that the tube axis of the plugging tube 412 and the tube axis of the inclined tube section 17 are arranged in parallel through the connection relationship between the guiding column 50 and the plugging duct 412a, so that the plugging tube 412 does not occupy too much space of the accommodating cavity 11, and the insulation effect between the conductive assembly 30 and the machine body shell 10 is ensured, and the interference on the installation space of the conductive assembly 30 is avoided.

In other embodiments, the outer circumference of the cylinder of the plugging cylinder 412 is provided with a positioning rib parallel to the axial direction of the cylinder, and the housing 10 is provided with a positioning recess correspondingly, and when the plugging cylinder 412 is plugged from the input port 111, the positioning rib can be slidably connected with the positioning recess.

Referring to fig. 11, in an embodiment, a conductive hole 321 is formed at the head of the conductive bolt 32, a conductive spring 322 connected to the input shaft 31 is disposed in the conductive hole 321, and the conductive spring 322 is further disposed to ensure a connection relationship between the conductive bolt 32 and the input shaft 31. Specifically, when the conductive spring 322 is compressed, the conductive spring 322 has elastic potential energy, and the spring continuously has a tendency to return to a natural state under the action of the elastic potential energy, so that two ends of the conductive spring 322 can continuously abut against the conductive bolt 32 and the input shaft barrel 31 respectively, so as to ensure the connection relationship between the conductive spring 322 and the input shaft barrel 31; in addition, the head of the conductive bolt 32 is provided with the conductive hole 321, so that the end of the conductive spring 322 can be stably connected with the conductive bolt 32, the condition that the end of the conductive spring 322 slips off from the head of the conductive bolt 32 is avoided, and when the input shaft barrel 31 and the conductive bolt 32 are relatively deviated due to vibration, the conductive spring 322 can ensure the connection relationship between the input shaft barrel 31 and the conductive bolt 32 through the deformation of the conductive spring, and further the stability of the conductive assembly 30 is ensured. In other embodiments, the input shaft 31 is provided with a connection recess, and the head of the conductive bolt 32 abuts against the inner wall of the connection recess.

Further, still the butt is provided with conductive block 323 between conductive spring 322 with input shaft section of thick bamboo 31, conductive block 323 has increased the conductive area between input shaft and the conductive spring 322, so, at the dental root canal therapy cell-phone during operation, conductive block 323 strengthens the conductive effect of conductive component 30, and then guarantees the detection accuracy of dental root canal therapy cell-phone.

Referring to fig. 2, 7 and 8, in an embodiment, the insulation assembly 40 further includes a second insulation portion 42, the second insulation portion 42 is disposed around the outer periphery of the output shaft barrel 33, the second insulation portion 42 is provided with a through hole 421, and the conductive bolt 32 passes through the through hole 421 to abut against the output shaft barrel 33. Thus, the output shaft tube 33 and the body case 10 are insulated from each other by the provision of the second insulating portion 42. Additionally, the second insulating portion 42 is provided with a through hole 421 through which the conductive bolt 32 passes, on one hand, the second insulating portion 42 limits the conductive bolt so as to ensure that the conductive bolt 32 does not contact the body housing 10 in the process of connecting the output shaft barrel 33; on the other hand, the avoidance hole 421 of the second insulating portion 42 does not interfere with the connection relationship between the conductive bolt 32 and the output shaft barrel 33, ensuring electrical continuity between the conductive members 30.

With reference to fig. 7 and 8, further, the inner periphery of the housing 10 is provided with a positioning ring surface 16, the second insulating portion 42 is correspondingly provided with an abutting ring surface 422, and the abutting ring surface 422 is used for abutting against the positioning ring surface 16, so that the second insulating portion 42 can be relatively stably mounted in the accommodating cavity 11 through the abutting action between the abutting ring surface 422 and the positioning ring surface 16, so that the second insulating portion 42 is prevented from sliding relative to the output shaft barrel 33 due to the impact action, and the insulating effect between the output shaft barrel 33 and the housing 10 is ensured.

Referring to fig. 6 and 12, in an embodiment, the conductive assembly 30 further includes a conductive spring set 34 looped around the root canal file 20, the insulating assembly 40 further includes a third insulating portion 43, the third insulating portion 43 includes a wrapping insulating sheet 431 disposed near the output port 112, the wrapping insulating sheet 431 is looped around the outer periphery of the conductive spring set 34 and is formed with a dodging port 431a, the output shaft barrel 33 abuts against the conductive spring set 34 through the dodging port 431a, and it should be understood that the current of the output shaft barrel 33 flows to the root canal file 20 via the conductive spring set 34. The wrapping insulating sheet 431 is used for further ensuring an insulating state between the conductive elastic sheet group 34 and the airframe shell 10, so that the situation that the conductive elastic sheet group 34 is deviated in the accommodating cavity 11 due to the influence of external force and is contacted with the airframe shell 10 is avoided, and the insulating state between the conductive assembly 30 and the airframe shell 10 is further ensured; additionally, the wrapping insulating sheet 431 is formed with a relief opening 431a to avoid interference with the connection relationship between the output shaft barrel 33 and the conductive elastic sheet group 34.

Referring to fig. 6 in detail, further, the dental handpiece body further includes a core assembly 60 mounted in the accommodating cavity 11, and the core assembly 60 is drivingly connected to the root canal file 20; the machine body casing 10 is provided with an installation opening 113 for installing the movement assembly 60 relative to the output opening 112, the third insulation part 43 further comprises an insulation cylinder 432 disposed near the installation opening 113, and the insulation cylinder 432 is disposed between the movement assembly 60 and the machine body casing 10.

Specifically, in order to ensure the conductive effect between the conductive components 30, the conductive spring plate set 34 is annularly arranged on the periphery of the core component 60, when the dental root canal therapy mobile phone is impacted, the conductive spring plate is likely to contact with the core component 60, and at the mounting port 113, the end of the core component 60 is likely to contact with the body shell 10, so that current flows from the conductive component 30 through the core component 60 and is transferred to the body shell 10, and in order to avoid such a situation, an insulating cylinder 432 is additionally arranged at the mounting port 113 to separate the end of the core component 60 from the body shell 10 so as to ensure the insulating state between the core component 60 and the body shell 10, and thus, the insulating state between the body shell 10 and the internal components is further improved.

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

Claims (10)

1. A dental root canal treatment handpiece comprising a dental handpiece body and a power module, characterized in that the dental handpiece body comprises:

the machine body shell is provided with a containing cavity, and an input port and an output port which are respectively communicated with two opposite ends of the containing cavity;

one end of the root canal file is arranged in the output port, and the other end of the root canal file is exposed outside;

a conductive assembly extending from the input port through the receiving cavity to the file for transferring current from the power module to the file, the conductive assembly being disposed at intervals of the housing; and

and the insulating assembly is arranged between the conductive assembly and the machine body shell.

2. The dental endodontic handpiece of claim 1, wherein said conductive assembly is provided with an input shaft barrel, a conductive bolt and an output shaft barrel connected in sequence in a direction from said input port to said output port, said input shaft barrel being electrically connected to said power supply module, said output shaft barrel being electrically connected to said endodontic file;

the machine body shell is provided with an inclined cylinder section, the inclined cylinder section is provided with the input port, the insulating assembly comprises a first insulating part arranged on the inclined cylinder section, the first insulating part comprises a reversing shaft cylinder made of insulating materials, the reversing shaft cylinder is provided with internal threads, the input shaft cylinder is provided with external threads, and the external threads are in threaded connection with the internal threads; the reversing shaft cylinder is provided with a penetrating screw hole, and the conductive bolt is abutted to the output shaft cylinder through the penetrating screw hole.

3. The dental root canal therapy handpiece of claim 2, wherein the first insulating portion further comprises a plug-in barrel that is plugged between the inclined barrel section and the input shaft barrel;

the inner surface of the inclined barrel section is provided with a first limiting ring surface and a second limiting ring surface, the inner diameter of the second limiting ring surface is smaller than that of the first limiting ring surface, the second limiting ring surface is far away from the input port, the reversing shaft barrel is abutted to the second limiting ring surface, and the inserting barrel is abutted to the first limiting ring surface.

4. The dental root canal therapy handpiece of claim 3, wherein a first relief recess is provided in an inner wall of the inclined barrel section, the first relief recess is located between the first limit annulus and the second limit annulus, a second relief recess is provided on an outer periphery of the reversing shaft barrel corresponding to the first relief recess, and the first relief recess and the second relief recess define a positioning channel;

the plug-in cylinder is provided with a plug-in duct communicated with the positioning channel;

the dental handpiece body is also provided with a guide post, one end of the guide post is inserted into the positioning channel, and the other end of the guide post is inserted into the insertion hole channel.

5. The dental root canal therapy handpiece of claim 2, wherein the head of the conductive bolt is provided with a conductive hole in which a conductive spring is disposed in connection with the input shaft.

6. The dental endodontic handpiece of claim 5, wherein a conductive block is also disposed in abutment between the conductive spring and the input shaft barrel.

7. The dental endodontic handpiece of claim 2, wherein the insulating assembly further includes a second insulating portion, the second insulating portion being looped around the outer circumference of the output shaft barrel; the second insulation part is provided with an avoidance via hole, and the conductive bolt passes through the avoidance via hole to be abutted with the output shaft barrel.

8. The dental root canal therapy handpiece of claim 7, wherein the inner circumference of the body housing is provided with a positioning annulus, and the second insulating portion is correspondingly provided with an abutment annulus for abutting the positioning annulus.

9. The dental endodontic handpiece of any one of claims 2 to 8, wherein the conductive assembly further includes a conductive spring piece set looped around the root canal file, the insulating assembly further includes a third insulating portion including a wrap-around insulating piece disposed adjacent to the output port, the wrap-around insulating piece being looped around the outer periphery of the conductive spring piece set and formed with a relief port, and the output shaft barrel abuts against the conductive spring piece set through the relief port.

10. The dental endodontic handpiece of claim 9, wherein the dental handpiece body further includes a cartridge assembly mounted to the receiving cavity, the cartridge assembly drivingly connected to the root canal file; the machine body shell is provided with an installation port for installing the machine core assembly relative to the output port, the third insulation part further comprises an insulation cylinder which is close to the installation port, and the insulation cylinder is arranged between the machine core assembly and the machine body shell.