阅读说明：本技术 牙胶充填机 (Gutta-percha filling machine ) 是由 覃荣情 吴坤优 陆友 陈泽荣 张本琴 林剑华 孙胜 于 2021-09-14 设计创作，主要内容包括：本发明实施例提供了一种牙胶充填机,该牙胶充填机包括支撑件、发热管、密封件和推杆。支撑件设有沿自身轴向延伸的安装孔。发热管部分穿设于安装孔内。密封件设置于安装孔内,且紧密配合于发热管位于安装孔内的部分的端面。推杆可沿发热管的轴向移动地依次部分穿设于密封件和发热管内。以此能够避免软化的牙胶进入仪器内部。(The embodiment of the invention provides a gutta-percha filling machine which comprises a supporting piece, a heating pipe, a sealing piece and a push rod. The support member is provided with a mounting hole extending in the axial direction thereof. The heating tube is partially arranged in the mounting hole in a penetrating way. The sealing element is arranged in the mounting hole and is tightly matched with the end surface of the part of the heating tube in the mounting hole. The push rod can partially penetrate through the sealing piece and the heating tube in sequence along the axial movement of the heating tube. Thereby preventing the softened gutta-percha from entering the interior of the instrument.)

1. A gutta-percha filling machine, comprising:

the supporting piece is provided with a mounting hole extending along the axial direction of the supporting piece;

the heating tube is partially arranged in the mounting hole in a penetrating way;

the sealing element is arranged in the mounting hole and is tightly matched with the end surface of the part of the heating tube in the mounting hole;

and the push rod can partially penetrate through the sealing piece and the heating tube in sequence along the axial movement of the heating tube.

2. The gutta-percha filling machine as in claim 1, wherein said sealing member is made of an elastic material and is in interference fit with said push rod; and/or the presence of a gas in the gas,

the gap between the heating tube and the push rod is set to be capable of avoiding the infiltration of softened gutta-percha.

3. The gutta-percha filling machine as claimed in claim 1, further comprising a heat insulating member made of a heat insulating material, said heat insulating member being disposed between an inner peripheral surface of said mounting hole and an outer peripheral surface of said sealing member.

4. The gutta-percha filling machine according to claim 1, wherein said mounting hole comprises a first hole section and a second hole section, the diameters of which are sequentially reduced, a supporting step surface is formed between said first hole section and said second hole section, and an end surface of said sealing member, which is away from said heating tube, is attached to said supporting step surface.

5. The gutta percha filling machine as in claim 4, further comprising:

the glue injection needle is in threaded connection with the part of the heating tube, which is positioned outside the mounting hole, and the interior of the heating tube is communicated with the interior of the glue injection needle;

the anti-rotation structure is arranged between the first hole section and the heating tube and used for preventing the heating tube from rotating relative to the support piece in the process that the screwing length of the threads between the glue injection needle and the heating tube is gradually increased.

6. The gutta percha filling machine according to claim 5, wherein said rotation preventing structure comprises:

the first fixing piece is sleeved outside the heating pipe, part of the first fixing piece is accommodated in the first hole section, a connecting part is formed at the part of the first fixing piece, which is positioned outside the first hole section, the connecting part extends outwards along the radial direction of the first fixing piece, and the connecting part is connected with the supporting piece;

and the second fixing piece is accommodated in the first hole section, is connected to the peripheral surface of the heating tube, is positioned between the sealing piece and the first fixing piece and is propped against the first fixing piece.

7. The gutta-percha filling machine according to claim 6, wherein a first anti-rotation recess is formed in a portion of the first fixing member located in the first hole section, a second anti-rotation recess is formed in a position of the second fixing member corresponding to the first anti-rotation recess, and an anti-rotation column is commonly penetrated through the first anti-rotation recess and the second anti-rotation recess; or the like, or, alternatively,

one of the first fixing piece and the second fixing piece is provided with an engaging protrusion, the other of the first fixing piece and the second fixing piece is provided with an engaging recess, and the engaging recess is accommodated in the engaging recess.

8. The gutta-percha filling machine as in claim 6, wherein said first fixing member is made of a heat insulating material; and/or the presence of a gas in the gas,

an annular gap is reserved between the outer peripheral surface of the second fixing piece and the inner peripheral surface of the first hole section.

9. The gutta percha filling machine as in claim 1, further comprising:

the movable rod can be along the axial displacement ground of heating tube at least part wear to locate in the mounting hole, the one end of movable rod is equipped with the connecting hole, the push rod is located the tip of the part outside the heating tube connect in the connecting hole, wherein, the movable rod is used for driving under the exogenic action the push rod is along the axial displacement of heating tube.

10. The gutta-percha filling machine according to claim 9, further comprising a locking ring, wherein said locking ring is in an open loop shape, a fastening groove is formed on an outer circumferential surface of a portion of said push rod located at said connecting hole, a protruding buckle is formed on an inner circumferential surface of said locking ring, said protruding buckle is fastened with said fastening groove, said locking ring is at least partially received in said connecting hole and is fixedly connected with said moving rod;

or the like, or, alternatively,

the part of the push rod in the connecting hole and the part of the moving rod provided with the connecting hole are jointly penetrated with a limiting column, and the length extending direction of the limiting column and the axial direction of the push rod form an included angle.

Technical Field

The invention relates to the technical field of oral treatment instruments, in particular to a gutta-percha filling machine.

Background

Human teeth contain pulp cavities and 1-4 root canals, and blood vessels of dental nerves and trophic nerves are led out through the root canals, so that when infections occur in the pulp due to various conditions, functional damage of the teeth can be caused, and pains, jaw infection and other diseases can be caused. Root canal therapy is also called endodontic therapy, is a treatment method developed in recent years for protecting affected teeth, and has better treatment and protection effects on dental problems such as chronic pulpitis, chronic periapical periodontitis, periodontal pulp combined lesion, traumatic teeth and the like.

Root canal treatment includes several main treatment stages, including root canal preparation, disinfection, root canal filling, etc. after the root canal preparation and disinfection, the root canal filling is to fill the expanded root canal with medicine material to make the medicine material fit to the wall of the root canal. For root canal filling, gutta-percha filling machines are often used.

The inventor researches and discovers that the softened gutta-percha in the heating tube of the existing gutta-percha filling machine is easy to leak into the instrument along with the gap between the push rod and the heating tube, so that other parts of the gutta-percha filling machine are damaged.

Disclosure of Invention

The invention aims to provide a gutta-percha filling machine which can prevent gutta-percha in a heating pipe from leaking into an instrument.

In a first aspect, the present invention provides a gutta-percha filling machine, comprising:

the supporting piece is provided with a mounting hole extending along the axial direction of the supporting piece;

the heating tube is partially arranged in the mounting hole in a penetrating way;

the sealing element is arranged in the mounting hole and is tightly matched with the end surface of the part of the heating tube in the mounting hole;

and the push rod can partially penetrate through the sealing piece and the heating tube in sequence along the axial movement of the heating tube.

In an alternative embodiment, the sealing element is made of an elastic material and is in interference fit with the push rod; and/or the presence of a gas in the gas,

the gap between the heating tube and the push rod is set to be capable of avoiding the infiltration of softened gutta-percha.

In an alternative embodiment, the gutta percha filling machine further includes a heat insulating member made of a heat insulating material, the heat insulating member being disposed between an inner circumferential surface of the installation hole and an outer circumferential surface of the sealing member.

In an optional implementation mode, the mounting hole comprises a first hole section and a second hole section, the diameters of the first hole section and the second hole section are sequentially reduced, a supporting step surface is formed between the first hole section and the second hole section, and the end face, deviating from the heating tube, of the sealing element is attached to the supporting step surface.

In an alternative embodiment, the gutta percha filling machine further comprises:

the glue injection needle is in threaded connection with the part of the heating tube, which is positioned outside the mounting hole, and the interior of the heating tube is communicated with the interior of the glue injection needle;

the anti-rotation structure is arranged between the first hole section and the heating tube and used for preventing the heating tube from rotating relative to the support piece in the process that the screwing length of the threads between the glue injection needle and the heating tube is gradually increased.

In an alternative embodiment, the anti-rotation structure comprises:

the first fixing piece is sleeved outside the heating pipe, part of the first fixing piece is accommodated in the first hole section, a connecting part is formed at the part of the first fixing piece, which is positioned outside the first hole section, the connecting part extends outwards along the radial direction of the first fixing piece, and the connecting part is connected with the supporting piece;

and the second fixing piece is accommodated in the first hole section, is connected to the peripheral surface of the heating tube, is positioned between the sealing piece and the first fixing piece and is propped against the first fixing piece.

In an optional embodiment, a first anti-rotation recess is formed in a portion, located in the first hole section, of the first fixing piece, a second anti-rotation recess is formed in a position, corresponding to the first anti-rotation recess, of the second fixing piece, and anti-rotation columns are arranged in the first anti-rotation recess and the second anti-rotation recess in a penetrating mode; or the like, or, alternatively,

one of the first fixing piece and the second fixing piece is provided with an engaging protrusion, the other of the first fixing piece and the second fixing piece is provided with an engaging recess, and the engaging recess is accommodated in the engaging recess.

In an alternative embodiment, the first fixture is made of a thermally insulating material; and/or an annular gap is reserved between the outer peripheral surface of the second fixing piece and the inner peripheral surface of the first hole section.

In an alternative embodiment, the gutta percha filling machine further comprises:

the movable rod can be along the axial displacement ground of heating tube at least part wear to locate in the mounting hole, the one end of movable rod is equipped with the connecting hole, the push rod is located the tip of the part outside the heating tube connect in the connecting hole, wherein, the movable rod is used for driving under the exogenic action the push rod is along the axial displacement of heating tube.

In an optional embodiment, the gutta-percha filling machine further comprises a locking ring, wherein the locking ring is in an open ring shape, a fastening groove is formed in the outer circumferential surface of a portion, located in the connecting hole, of the push rod, a convex buckle is arranged on the inner circumferential surface of the locking ring, the convex buckle is fastened with the fastening groove, and at least part of the locking ring is accommodated in the connecting hole and is fixedly connected with the moving rod;

or the like, or, alternatively,

the part of the push rod in the connecting hole and the part of the moving rod provided with the connecting hole are jointly penetrated with a limiting column, and the length extending direction of the limiting column and the axial direction of the push rod form an included angle.

According to the gutta-percha filling machine provided by the embodiment of the invention, the sealing piece is arranged on the end face of the part of the heating tube, which is positioned in the mounting hole of the support piece, and the push rod is sequentially arranged in the sealing piece and the heating tube in a penetrating manner, so that when the push rod extrudes softened gutta-percha in the heating tube, even if the softened gutta-percha leaks between the heating tube and the push rod, the sealing piece can play a sealing role in preventing the softened gutta-percha from leaking into the mounting hole, and the condition that other parts are damaged due to the fact that the softened gutta-percha leaks into an instrument is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a prior art gutta-percha filling machine;

FIG. 2 is a schematic view of a gutta-percha filling machine according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of a support member according to an embodiment of the present invention;

FIG. 5 is an exploded view of a combination of a heat pipe and an anti-rotation structure according to an embodiment of the present invention;

FIG. 6 is an exploded view of a combination of a heat pipe and an anti-rotation structure according to another embodiment of the present invention;

FIG. 7 is an exploded view of the push rod and travel rod combination of the present invention;

FIG. 8 is a schematic view of a putter in accordance with an embodiment of the present invention;

figure 9 is a schematic view of a locking ring according to an embodiment of the present invention.

Icon: 1-a heating tube; 2-a push rod; 21-a piston; 23-a catching groove; 3-glue injection needle; 4-a support; 41-mounting holes; 410-a first bore section; 412-a second bore section; 43-a threaded hole; 45-supporting the step surface; 5-a seal; 50-a thermal insulation; 6-a first fixing piece; 61-a connecting portion; 610-punching; 63-a first arc-shaped slot; 65-engaging projections; 650-a first planar portion; 7-a second fixing piece; 70-a mating segment; 701-a second arc-shaped groove; 72-a fixed segment; 721-a fixing hole; 74-engaging recess; 741-a second planar portion; 79-anti-rotation column; 8-a moving rod; 81-locking ring; 810-convex buckle; 82-connecting hole; 84-a limiting column; 9-screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "held" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the offset may be a direct offset or an indirect offset through an intermediary. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Root canal treatment includes several main treatment stages, root canal preparation, disinfection, root canal filling, etc. the root canal preparation is to perform mechanical cutting and file expanding on the root canal to achieve the required shaping, so as to create better space conditions for subsequent root canal filling. Disinfection is the removal of organic matter in the root canal and infected tissue (bacteria) of the root canal by irrigation after the root canal preparation is completed. In root canal filling, after the root canal preparation and sterilization are completed, a medicinal material is filled into the enlarged root canal so that the filled medicinal material is attached to the wall of the root canal. For root canal filling, gutta-percha filling machines are often used.

The step of filling the root canal is usually to stick a proper gutta-percha point with paste and then to extend into the enlarged root canal, then to soften and cut the gutta-percha point by using a working tip heated by a heat carrier, then to compact the gutta-percha in the root canal by a vertical pressurizer, and finally to fill the root canal by injecting the gutta-percha by using a gutta-percha filling machine. The working process of the gutta-percha filling machine is that the gutta-percha rod is arranged in the instrument, the filling machine heats and softens the gutta-percha rod, and the softened gutta-percha is pushed out from the glue injection needle through the internal push rod.

Referring to fig. 1, fig. 1 is a schematic view of a conventional gutta-percha filling machine, and through continuous experiments and research by the inventor, the gutta-percha filling machine in fig. 1 generally arranges a piston 21 at an end of a portion of a push rod 2 located in a heating tube 1, and prevents softened gutta-percha in the heating tube 1 from leaking into the interior of the machine along a gap between the push rod 2 and the heating tube 1 by interference fit of the piston 21 and the heating tube 1, however, because the push rod 2 needs to continuously reciprocate in the heating tube 1, the piston 21 is worn after long-term friction with the heating tube 1, so that a gap between the piston 21 and the heating tube 1 becomes large, and the sealing performance becomes poor, at this time, the softened gutta-percha in the heating tube 1 easily enters a gap between the push rod 2 and the heating tube 1 from the gap between the piston 21 and the heating tube 1, and finally leaks into the interior of the machine, causing damage to other components within the gutta percha filling machine.

Based on the above-mentioned defects in the prior art found by the inventors through continuous experiments and researches, the inventors have studied to provide the following examples to improve the above-mentioned defects in the prior art. Some embodiments of the invention are described in detail below. It should be noted that the features of the following embodiments and examples may be combined with each other without conflict.

Referring to fig. 2 and 3, an embodiment of the present invention provides a gutta-percha filling machine, which includes a support 4, a heating tube 1, a sealing member 5, and a push rod 2. The support 4 is provided with a mounting hole 41 extending axially along itself. The heating tube 1 is partially inserted into the mounting hole 41. The sealing member 5 is disposed in the mounting hole 41 and is tightly fitted to the end surface of the portion of the heat generating tube 1 located in the mounting hole 41. The push rod 2 can partially penetrate through the sealing element 5 and the heating tube 1 in sequence along the axial direction of the heating tube 1.

From this, the terminal surface through the part that is located support piece 4 mounting hole 41 at heating tube 1 sets up sealing member 5, push rod 2 wears to locate in this sealing member 5 and heating tube 1 in proper order, thereby when push rod 2 extrudes the soft gutta-percha in heating tube 1, even soft gutta-percha seepage to between heating tube 1 and push rod 2, sealing member 5 also can play the sealed effect that prevents soft gutta-percha from revealing in mounting hole 41, the inside seepage of soft gutta-percha to the instrument has been avoided, the condition that leads to other spare parts to damage takes place.

In the embodiment, the sealing member 5 is made of an elastic material with wear resistance and high temperature resistance, and is in interference fit with the push rod 2, so that when the push rod 2 reciprocates relative to the sealing member 5 for a long time, good sealing performance can be maintained all the time, and the softened gutta percha is effectively prevented from leaking into the mounting hole 41. Among them, PEEK is an example of the elastic material. The seal 5 may be a flood seal.

In addition, the surface of the push rod 2 is smooth, and the outer diameter of the push rod 2 is slightly smaller than the inner diameter of the heating tube 1, so that a small clearance fit is formed between the push rod 2 and the heating tube 1, and therefore the gap between the push rod 2 and the heating tube 1, which is prevented from being infiltrated by softened gutta percha, can be achieved, and the sealing performance is further improved. Wherein, the push rod 2 can be made of ceramic material.

Referring to fig. 2 to 4, the mounting hole 41 includes a first hole section 410 and a second hole section 412 with diameters decreasing in sequence, a supporting step surface 45 is formed between the first hole section 410 and the second hole section 412, and an end surface of the sealing member 5 facing away from the heating tube 1 is attached to the supporting step surface 45, so that the sealing member 5 is pressed between the end surface of the heating tube 1 and the supporting step surface 45 to ensure the stability of the sealing member 5 and further ensure the sealing property.

The gutta-percha filling machine further includes a heat insulating member 50 made of a heat insulating material, and the heat insulating member 50 is provided to the installation hole 41. Specifically, the heat insulating member 50 is disposed between the inner circumferential surface of the first hole section 410 and the outer circumferential surface of the sealing member 5, thereby performing a heat insulating function to prevent the support member 4 from being heated when the heat generating pipe 1 heats the gutta percha. Among them, PEEK is an example of the heat insulating material.

The gutta-percha filling machine further comprises a glue injection needle 3 and an anti-rotation structure, the glue injection needle 3 and the heating tube 1 are located outside the mounting hole 41 and are in threaded connection, the inside of the heating tube 1 is communicated with the inside of the glue injection needle 3, and therefore when the push rod 2 extrudes softened gutta-percha in the heating tube 1, the gutta-percha is extruded to be injected into the tooth root canal of a patient through the glue injection needle 3, and root canal filling is achieved.

Prevent that rotational structure sets up between first hole section 410 and heating tube 1 for screw thread between injecting glue needle 3 and heating tube 1 closes the in-process that length is crescent soon, closes the in-process soon with injecting glue needle 3 and heating tube 1 promptly, prevents that heating tube 1 from rotating for support piece 4, thereby guarantees that injecting glue needle 3 can screw up on heating tube 1, thereby strengthens the leakproofness between injecting glue needle 3 and the heating tube 1.

Further, referring to fig. 2, fig. 3 and fig. 5, the anti-rotation structure includes a first fixing member 6 and a second fixing member 7. The first fixing member 6 is sleeved outside the heating tube 1, and a part of the first fixing member is accommodated in the first hole section 410, a connecting portion 61 is formed at a part of the first fixing member 6 located outside the first hole section 410, the connecting portion 61 extends outward along a radial direction of the first fixing member 6, and the connecting portion 61 is connected with the supporting member 4. The second fixing member 7 is accommodated in the first hole section 410, connected to the outer circumferential surface of the heating tube 1, located between the sealing member 5 and the first fixing member 6, and abutted against the first fixing member 6.

The connecting portion 61 is an annular protrusion surrounding the outer peripheral surface of the first fixing member 6, so as to form a flange-shaped part together with the first fixing member 6, the connecting portion 61 is provided with a plurality of through holes 610, the through holes 610 are arranged at intervals along the circumferential direction of the connecting portion 61, the end surface of the support member 4 is provided with threaded holes 43 corresponding to the through holes 610 one by one, and the screws 9 are screwed into the threaded holes 43 through the through holes to be in threaded engagement, so as to fix the first fixing member 6 in the first hole section 410 of the mounting hole 41.

The part of the first fixing member 6 located in the first hole section 410 is provided with a first anti-rotation recess, the second fixing member 7 is provided with a second anti-rotation recess corresponding to the first anti-rotation recess, and the first anti-rotation recess and the second anti-rotation recess are provided with an anti-rotation column 79 in a penetrating manner.

Specifically, the inner peripheral surface of the first fixing member 6 is provided with a first arc-shaped groove 63 extending in the axial direction of the heating tube 1, and the first arc-shaped groove 63 is a first rotation-preventing recess. The second fixing member 7 includes a matching section 70 and a fixing section 72 which are coaxially connected and have diameters which are sequentially increased, the outer peripheral surface of the matching section 70 is provided with a second arc-shaped groove 701 which extends along the axial direction of the heating tube 1, the fixing section 72 is provided with a fixing hole 721 which extends along the axial direction of the heating tube 1, and the fixing hole 721 is communicated with the second arc-shaped groove 701 to form a second rotation-preventing recess together. Prevent changeing post 79 for the shape with first prevent changeing sunken and the second prevent the cylinder of the sunken shape homogeneous phase adaptation of changeing, thereby when preventing changeing post 79 and wear to locate first prevent changeing sunken and second and prevent changeing sunken, because first mounting 6 passes through connecting portion 61 to be fixed in the first hole section 410 of mounting hole 41, second mounting 7 and heating tube 1's end connection, consequently can keep heating tube 1 fixed for support piece 4, make when injecting glue needle 3 and heating tube 1 revolve, can not rotate for support piece 4, so that inject glue needle 3 screws up on heating tube 1.

It should be noted that the first anti-rotation recess may also be a through hole directly formed in the end surface of the first fixing member 6 away from the connecting portion 61, the second fixing member 7 may also be an annular cylinder with a constant outer diameter, and the second anti-rotation recess is a through hole directly formed in the end surface of the second fixing member 7 corresponding to the first fixing member 6. In addition, in this embodiment, the specific number of the first anti-rotation recess, the anti-rotation column 79 and the second anti-rotation recess is not specifically limited, as long as the first anti-rotation recess, the anti-rotation column 79 and the second anti-rotation recess are in one-to-one correspondence, and a first anti-rotation recess, a corresponding anti-rotation column 79 and a corresponding second anti-rotation recess together form an anti-rotation portion. For example, more than two first anti-rotation recesses may be formed in the first fixing member 6, more than two second anti-rotation recesses may be correspondingly formed in the second fixing member 7, each first anti-rotation recess and a corresponding second anti-rotation recess commonly penetrate through one anti-rotation column 79, wherein the first anti-rotation recesses are arranged around the first fixing member 6 at equal intervals in the circumferential direction, and the second anti-rotation recesses are arranged around the second fixing member 7 at equal intervals in the circumferential direction.

The connection mode of the second fixing member 7 and the heating tube 1 may be a threaded connection, a fixed connection or an integral connection, which is not limited in this embodiment. The first fixing member 6 is made of a heat insulating material, such as PEEK, so that the heat conduction amount of the heat generating tube 1 to the support member 4 can be reduced, and the temperature of the support member 4 can be kept constant. An annular gap is left between the outer peripheral surface of the second fixing member 7 and the inner peripheral surface of the first hole section 410, so that the effect of slowing down the temperature rise of the supporting member 4 can be achieved.

Referring to fig. 6, in other embodiments, the abutting relationship between the first fixing element 6 and the second fixing element 7 may be that one of the first fixing element 6 and the second fixing element 7 is provided with an engaging protrusion 65, the other of the first fixing element 6 and the second fixing element 7 is provided with an engaging recess 74, and the engaging recess 74 is accommodated in the engaging recess 74, so that the effect of preventing the heat generating tube 1 from rotating relative to the supporting member 4 can also be achieved.

Further, an engaging recess 74 may be provided on the fixing section 72 of the second fixing member 7 in a region close to the first fixing member 6, an engaging protrusion 65 may be provided on the first fixing member 6 in a region close to the second fixing member 7 and corresponding to the engaging recess 74, and the engaging protrusion 65 may extend toward the second fixing member 7 in the axial direction of the heat generating tube 1 and may protrude into the engaging recess 74. Specifically, the first flat part 650 is provided on the surface of the engagement projection 65 close to the heat generating tube 1, the second flat part 741 is provided on the side surface of the engagement recess 74, and the first flat part 650 and the second flat part 741 are in contact with each other, so that the heat generating tube 1 can be prevented from rotating with respect to the holder 4. The specific number of the engaging protrusions 65 and the engaging recesses 74 is not limited, as long as the engaging protrusions 65 and the engaging recesses 74 correspond to each other one by one, and when the number of the engaging protrusions 65 and the engaging recesses 74 is two or more, the engaging protrusions 65 are arranged at intervals in the circumferential direction of the first fixing member 6, and the engaging recesses 74 are arranged at intervals in the axial direction of the second fixing member 7. Of course, the positions of the engaging projection 65 and the engaging recess 74 may be interchanged, that is, the engaging recess 74 may be provided on the first fixing member 6 and the engaging projection 65 may be provided on the second fixing member 7.

In this embodiment, the gutta-percha filling machine further includes a moving rod 8, the moving rod 8 can be at least partially penetrated into the mounting hole 41 along the axial direction of the heating tube 1, a connecting hole 82 is formed at one end of the moving rod 8, the end of the portion of the push rod 2 located outside the heating tube 1 is connected into the connecting hole 82, wherein the moving rod 8 is used for driving the push rod 2 to move along the axial direction of the heating tube 1 under the action of external force.

Specifically, referring to fig. 2 and 9, the push rod 2 and the movable rod 8 may be connected by a locking ring 81, that is, the gutta percha filling machine further includes a locking ring 81, the locking ring 81 is in an open ring shape, a fastening groove 23 is formed on an outer circumferential surface of a portion of the push rod 2 located at the connecting hole 82, a protruding buckle 810 is formed on an inner circumferential surface of the locking ring 81, the protruding buckle 810 is engaged with the fastening groove 23, and the locking ring 81 is at least partially received in the connecting hole 82 and is fixedly connected to the movable rod 8. Referring to fig. 7 to 9, the male buckle 810 may be a convex block, and the corresponding buckle slot 23 is a concave hole pile; the male buckle 810 may also be an arc-shaped protrusion extending along the circumferential direction of the locking ring 81, and the corresponding buckle groove 23 is an annular groove extending along the circumferential direction around the push rod 2. The locking ring 81 may be formed by two semicircular rings, and the inner circumferential surfaces of the two semicircular rings are respectively provided with a convex buckle 810, so that the locking ring 81 and the push rod 2 are accommodated in the connecting hole 82 together after being sleeved and clasped, and then the locking ring 81 and the moving rod 8 are fixedly connected by using a welding process, so that the moving rod 8 and the push rod 2 are connected, and the moving rod 8 can drive the push rod 2 to move along the axial direction of the heating tube 1.

Of course, the connection mode of the push rod 2 and the moving rod 8 may also be that the part of the push rod 2 located in the connection hole 82 and the part of the moving rod 8 provided with the connection hole 82 jointly penetrate through the limiting column 84, the length extending direction of the limiting column 84 forms an included angle with the axial direction of the push rod 2, and the effect that the moving rod 8 drives the push rod 2 to move along the axial direction of the heating tube 1 can also be realized. Wherein, the limit column 84 is fixed with the moving rod 8 by welding, and the limit column 84 is at a right angle with the axial direction of the push rod 2 to ensure the connection firmness.

In conclusion, the terminal surface through the part that is located support piece 4 mounting hole 41 at heating tube 1 sets up sealing member 5, push rod 2 wears to locate this sealing member 5 and heating tube 1 in proper order, thereby when push rod 2 extrudes the soft gutta-percha in heating tube 1, even soft gutta-percha seepage is to between heating tube 1 and push rod 2, sealing member 5 also can play the sealed effect that prevents soft gutta-percha from revealing in mounting hole 41, the inside seepage of soft gutta-percha to the instrument has been avoided, the condition that leads to other spare parts to damage takes place.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.