Gutta-percha filling instrument

Abstract

The utility model provides a gutta-percha filling instrument, and belongs to the technical field of medical instruments. The gutta-percha filling instrument comprises a base and a silver tube assembly. The base is provided with a containing cavity and a first annular heat insulation cavity, and the first end of the silver tube assembly is located in the containing cavity. The first annular heat insulation cavity surrounds the containing cavity, and an opening is formed in the side, facing or backing on to the second end of the silver tube assembly, of the first annular heat insulation cavity. When the gutta-percha filling instrument is used, the silver tube assembly extends into the oral cavity of a patient, and gutta-percha is injected into a tooth root canal of the patient. In the process, heat of the gutta-percha can be transferred to the inner wall of the containing cavity. As the first annular heat insulation cavity surrounds the accommodating cavity, heat on the inner wall of the accommodating cavity is difficult to pass through the first annular heat insulation cavity. In addition, heat on the base can be dissipated to the atmosphere through the opening, and the heat dissipation effect of the base is further improved. Therefore, the heat of the gutta-percha is difficult to transfer to the outer wall of the base. Therefore, in the treatment process, even if the outer wall of the base makes contact with the oral cavity of the patient, the oral cavity of the patient cannot be scalded.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a gutta-percha filling instrument. Background Art

[0002] The gutta-percha filling instrument is a medical device commonly used in oral root canal treatment, which is used to inject gutta-percha into the patient's tooth root canal.

[0003] In the related art, the gutta-percha filling instrument comprises a base and a silver tube assembly. The base has a receiving cavity, which is used to receive a gutta-percha heating tube, and the first end of the silver tube assembly extends into the receiving cavity of the base. During the treatment process, the second end of the silver tube assembly extends into the patient's oral cavity, and the gutta-percha heating tube injects gutta-percha into the patient's tooth root canal through the silver tube assembly.

[0004] However, the temperature of the gutta-percha is relatively high, so the heat of the gutta-percha is easily transferred to the base. Although there is a gap between the gutta-percha filling device and the accommodating cavity in the related art, the accommodating cavity is not easy to dissipate heat. After the heat accumulates for a period of time, the heat insulation effect is not ideal, and the temperature of the outer surface of the base is still easily high. In this way, when the base contacts the patient's mouth, there is a risk of harming the patient's mouth. Utility Model Content

[0005] The present disclosure provides a gutta-percha filling instrument, which can solve the technical problems existing in the related art. The technical solution of the gutta-percha filling instrument is as follows.

[0006] The present disclosure provides a gutta-percha filling instrument, the gutta-percha filling instrument comprising a base and a silver tube assembly;

[0007] The base has a containing cavity and a first annular heat-insulating cavity, and the first end of the silver tube assembly is located inside the containing cavity;

[0008] In a possible implementation, the first annular heat-insulating cavity surrounds the accommodating cavity, and the first annular heat-insulating cavity has an opening on a side facing toward or away from the second end of the silver tube assembly.

[0009] The first annular thermal insulation cavity includes at least one of a first sub-thermal insulation cavity and a second sub-thermal insulation cavity;

[0010] The first sub-insulation cavity surrounds the accommodating cavity, and the first sub-insulation cavity has a first opening on a side facing away from the second end of the silver tube assembly;

[0011] The second sub-insulation cavity surrounds the accommodating cavity, and the second sub-insulation cavity has a second opening on a side facing the second end of the silver tube assembly.

[0012] In a possible implementation, the first annular thermal insulation cavity includes the first sub-thermal insulation cavity and the second sub-thermal insulation cavity;

[0013] There is an axial distance D between one end of the first sub-insulation cavity facing away from the first opening and one end of the second sub-insulation cavity facing away from the second opening.

[0014] In a possible implementation, the outer diameter of the base gradually decreases in a direction approaching the second end of the silver tube assembly;

[0015] The inner diameter D1 of the first sub-insulation cavity is greater than the inner diameter D2 of the second sub-insulation cavity.

[0016] In a possible implementation, the accommodating cavity includes a base accommodating cavity and a heating tube accommodating cavity, the inner diameter of the base accommodating cavity is smaller than the inner diameter of the heating tube accommodating cavity, a limiting step is formed between the base accommodating cavity and the heating tube accommodating cavity, the silver tube assembly is limited by the limiting step and passes through the base accommodating cavity, wherein the heating tube accommodating cavity is used to accommodate the gutta-percha heating tube, the base accommodating cavity is used to accommodate the second end of the silver tube assembly, and the silver tube assembly is used to be connected to the gutta-percha heating tube;

[0017] The base also has a second annular heat-insulating cavity, which surrounds the base accommodating cavity. The second annular heat-insulating cavity has a third opening on a side facing the heating tube accommodating cavity, and the third opening is connected to the heating tube accommodating cavity.

[0018] In a possible implementation, the inner diameter D3 of the outer cavity wall of the second annular heat-insulating cavity is smaller than or equal to the inner diameter D4 of the heating tube accommodating cavity.

[0019] In a possible implementation, the gutta-percha filling instrument further includes a rotating head, and the rotating head is rotatably connected to the base;

[0020] The rotating head comprises a cap body and a cylinder;

[0021] The column is fixed inside the cap body, and the silver tube assembly passes through the column;

[0022] A third annular heat-insulating cavity is formed between the cap body and the column, and the third annular heat-insulating cavity has a fourth opening on a side facing the base.

[0023] In a possible implementation, the gutta-percha filling instrument further includes a clamping piece;

[0024] The card-joining piece is engaged with the inside of the cap body, and the silver tube assembly passes through the card-joining piece and is engaged with the card-joining piece;

[0025] A portion of the clamping piece is opposite to the column, and another portion is opposite to the fourth opening of the third annular heat-insulating cavity.

[0026] In a possible implementation manner, there is a gap between the clamping piece and the column.

[0027] In a possible implementation, the cap body further has an annular fourth annular heat-insulating cavity, the fourth annular heat-insulating cavity has a fifth opening on a side facing the base, and the fifth heat-insulating cavity surrounds the clamping piece.

[0028] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0029] The present disclosure provides a gutta-percha filling instrument. When using the gutta-percha filling instrument, the silver tube assembly is inserted into the patient's oral cavity, and gutta-percha is injected into the patient's tooth root canal. During this process, the heat of the gutta-percha will be transferred to the inner wall of the accommodating cavity of the base. Since the present disclosure provides a first annular heat-insulating cavity on the base, and the first annular heat-insulating cavity surrounds the accommodating cavity, it is difficult for the heat on the inner wall of the accommodating cavity to pass through the heat-insulating cavity. And since the first annular heat-insulating cavity has an opening on the side facing or away from the second end of the silver tube assembly. Therefore, the heat on the side wall of the first annular heat-insulating cavity can be dissipated to the outside of the base through the opening, which is beneficial for the base to dissipate heat into the atmosphere, thereby further improving the heat dissipation effect of the base. In this way, the heat of the gutta-percha is difficult to be transferred to the outer wall of the base. Therefore, during the treatment process, even if the outer wall of the base contacts the patient's oral cavity, it will not burn the patient's oral cavity.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the present disclosure. In the drawings:

[0032] Figure 1 is an exploded view of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0033] Figure 2 is an exploded view of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0034] Figure 3 is an exploded view of a silver tube assembly shown in an embodiment of the present disclosure;

[0035] Figure 4 is a cross-sectional view of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0036] Figure 5 is a heat transfer path diagram of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0037] Figure 6 is a cross-sectional view of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0038] Figure 7 is a cross-sectional view of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0039] Figure 8 is a cross-sectional view of a gutta-percha filling instrument shown in an embodiment of the present disclosure;

[0040] Fig. 9 is a structural schematic diagram of a rotating head shown in an embodiment of the present disclosure;

[0041] Fig.10 is a cross-sectional view of a rotating head shown in an embodiment of the present disclosure;

[0042] Fig.11 is an exploded view of a rotating head and a clamping piece shown in an embodiment of the present disclosure;

[0043] Fig.12 It is a schematic diagram of a process of clamping a clamping piece and a silver tube assembly shown in an embodiment of the present disclosure.

[0044] Legend:

[0045] 1. base, 10. accommodating cavity, 101. base accommodating cavity, 102. heating tube accommodating cavity, 103. limiting step, 11. first annular heat insulation cavity, 111. first sub-heat insulation cavity, 1110. first opening, 112. second sub-heat insulation cavity, 1120. second opening, 12. second annular heat insulation cavity, 120. third opening, 13. sealing groove;

[0046] 2. silver tube assembly, 20. channel, 21. base, 22. rotating tube, 221. second groove, 23. silver tube;

[0047] 3. rotating head, 31. cap body, 311. fourth annular heat-insulating cavity, 3110. fifth opening, 312. first groove, 313. second protrusion, 32. column, 33. third annular heat-insulating cavity, 330. fourth opening;

[0048] 4. a card-joining piece, 41. a first protrusion, 42. a third protrusion, 43. a card-joining hole, 430. a sixth opening;

[0049] 5. Sealing ring.

[0050] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0052] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] The gutta-percha filling instrument is a commonly used medical device in oral root canal treatment, which is used to inject gutta-percha into the root of the patient's tooth. In the related art, the gutta-percha filling instrument includes a base and a silver tube assembly. The base has a receiving cavity, which is used to accommodate the gutta-percha heating cylinder, and the first end of the silver tube assembly extends into the receiving cavity of the base. During the treatment process, the second end of the silver tube assembly extends into the patient's mouth, and the gutta-percha heating cylinder injects gutta-percha into the patient's tooth root canal through the silver tube assembly.

[0054] However, the temperature of the gutta-percha is relatively high, so the heat of the gutta-percha is easily transferred to the base. Although there is a gap between the gutta-percha filling device and the accommodating cavity in the related art, the accommodating cavity is not easy to dissipate heat. After the heat accumulates for a period of time, the heat insulation effect is not ideal, and the temperature of the outer surface of the base is still easily high. In this way, when the base contacts the patient's mouth, there is a risk of harming the patient's mouth.

[0055] The present disclosure provides a gutta-percha filling instrument, such as Figure 1 and Figure 2 As shown, the gutta-percha filling instrument comprises a base 1 and a silver tube assembly 2. The base 1 has a receiving cavity 10 and a first annular heat-insulating cavity 11, and one end of the silver tube assembly 2 is located inside the receiving cavity 10. The first annular heat-insulating cavity 11 surrounds the receiving cavity 10, and the first annular heat-insulating cavity 11 has an opening on one side facing or away from the silver tube assembly 2.

[0056] Among them, Figure 1-Figure 3 As shown, the silver tube assembly 2 includes a base 21, a rotating tube 22 and a silver tube 23, and the silver tube 23 is fixed to the rotating tube 22. The base 21 is fixed to the accommodating chamber 10, the base 21 is sleeved around the rotating tube 22, the rotating tube 22 extends from the base 21, and the rotating tube 22 is rotatably connected to the base 21. The rotating tube 22 is sleeved around the silver tube 23, the silver tube 23 extends from the rotating tube 22, and the rotating tube 22 is fixedly connected to the silver tube 23, thereby driving the silver tube 23 to rotate. The silver tube 23 has a channel 20, and the channel 20 communicates the interior of the rotating tube 22 and the interior of the base 21.

[0057] The accommodating cavity 10 is used to accommodate the gutta-percha heating cylinder, which injects gutta-percha into the base 21 of the silver tube assembly 2 , so that the gutta-percha enters the silver tube 23 of the silver tube assembly 2 through the accommodating cavity 10 .

[0058] The first annular heat-insulating cavity 11 is filled with air, and the thermal conductivity of air is much lower than that of plastic and metal. The first annular heat-insulating cavity 11 can also be called an air cavity.

[0059] The technical solution provided by the disclosed embodiment can reduce the risk of the gutta-percha filling instrument damaging the patient's oral cavity during root canal treatment. When using the gutta-percha filling instrument, the silver tube assembly 2 is inserted into the patient's oral cavity, and gutta-percha is injected into the patient's tooth root canal. In this process, the heat of the gutta-percha will be transferred to the inner wall of the accommodating cavity 10 of the base 1 through the silver tube assembly 2. Since the base 1 has a first annular heat-insulating cavity 11, and the first annular heat-insulating cavity 11 surrounds the accommodating cavity 10, it is difficult for the heat on the inner wall of the accommodating cavity 10 to pass through the first annular heat-insulating cavity 11. In this way, it is difficult for the gutta-percha heat to be transferred to the outer wall of the base 1. And since the first annular heat-insulating cavity 11 has an opening on one side facing or away from the silver tube assembly 2, the heat on the side wall of the first annular heat-insulating cavity 11 can be dissipated to the outside of the base 1 through the opening, which is conducive to the heat dissipation of the base 1 into the atmosphere, thereby further improving the heat dissipation effect of the base 1. Therefore, during the treatment process, even if the outer wall of the base 1 contacts the patient's oral cavity, it will not burn the patient's oral cavity.

[0060] The implementation of the first annular heat-insulating cavity 11 is described below by way of example.

[0061] In some examples, such as Figure 4-Figure 8 As shown, the first annular heat-insulating cavity 11 includes at least one of a first sub-heat-insulating cavity 111 and a second sub-heat-insulating cavity 112. The first sub-heat-insulating cavity 111 surrounds the accommodating cavity 10, and the first sub-heat-insulating cavity 111 has a first opening 1110 on a side facing away from the second end of the silver tube assembly 2. The second sub-heat-insulating cavity 112 surrounds the accommodating cavity 10, and the second sub-heat-insulating cavity 112 has a second opening 1120 on a side facing the second end of the silver tube assembly 2.

[0062] For example, Figure 7 As shown, the first annular insulation cavity 11 includes a first sub-insulation cavity 111. In order to enhance the insulation effect of the first sub-insulation cavity 111, the first sub-insulation cavity 111 is set to have a deeper depth. In this way, the first sub-insulation cavity 111 can surround the entire accommodating cavity 10. When the heat on the inner wall of the accommodating cavity 10 is transferred outward, the first sub-insulation cavity 111 can play a blocking role. In addition, the heat on the base 1 can also be dissipated to the outer wall of the base 1 through the first opening 1110, thereby further reducing the temperature of the base 1. During use, the first opening 1110 is away from the patient's mouth, so the first sub-insulation cavity 111 can dissipate heat in the direction away from the mouth, avoiding hotter air from entering the mouth and affecting the treatment comfort.

[0063] For example, Figure 8 As shown, the first annular heat-insulating cavity 11 includes a second sub-heat-insulating cavity 112. In order to enhance the heat-insulating effect of the second sub-heat-insulating cavity 112, the second sub-heat-insulating cavity 112 is set to have a deeper depth. In this way, the second sub-heat-insulating cavity 112 can surround the entire accommodating cavity 10. When the heat on the inner wall of the accommodating cavity 10 is transferred outward, the second sub-heat-insulating cavity 112 can play a blocking role. In addition, the heat on the base 1 can also be dissipated to the outer wall of the base 1 through the second opening 1120, thereby further reducing the temperature of the base 1.

[0064] For example, Figure 4-Figure 6 As shown, the first annular heat-insulating cavity 11 includes a first sub-heat-insulating cavity 111 and a second sub-heat-insulating cavity 112. An end of the first sub-heat-insulating cavity 111 facing away from the first opening 1110 and an end of the second sub-heat-insulating cavity 112 facing away from the second opening 1120 are spaced apart in the axial direction by a distance D. Figure 5 As shown, when the heat on the inner wall of the accommodating cavity 10 is transferred outward, it will be hindered by the first sub-insulation cavity 111 and the second sub-insulation cavity 112 at the same time.

[0065] The technical solution provided by the embodiment of the present disclosure simultaneously sets the first sub-insulation cavity 111 and the second sub-insulation cavity 112, which can avoid the depth of a single insulation cavity being too large. If the side of the base 1 close to the silver tube assembly 2 is subjected to external force, since the depth of the second sub-insulation cavity 112 is small, the force arm at the second opening 1120 of the second sub-insulation cavity 112 is small, so that the moment received at the second opening 1120 is small. Therefore, the base 1 at the second opening 1120 is not easy to deform, so that the base 1 at the second opening 1120 has a higher strength. Similarly, the base 1 at the first opening 1110 of the first sub-insulation cavity 111 also has a higher strength.

[0066] In some examples, such as Figure 6As shown, the outer diameter of the base 1 gradually decreases in the direction close to the second end of the silver tube assembly 2, and the inner diameter D1 of the first sub-insulation cavity 111 is greater than the inner diameter D2 of the second sub-insulation cavity 112. In this way, the wall thickness of the base 1 on both sides of the first sub-insulation cavity 111 can be thicker, so that the base 1 has a higher strength.

[0067] It should be noted that the disclosed embodiment does not specifically limit the number, inner diameter, depth, opening direction, and arrangement of the cavities in the first annular heat insulation cavity 11. During the production process, the specific structure of the first annular heat insulation cavity 11 can be set according to the specific shape and size of the base 1.

[0068] In some examples, such as Figure 4 As shown, the accommodating chamber 10 includes a base accommodating chamber 101 and a heating tube accommodating chamber 102, the inner diameter of the base accommodating chamber 101 is smaller than the inner diameter of the heating tube accommodating chamber 102, and a limiting step 103 is formed between the base accommodating chamber 101 and the heating tube accommodating chamber 102, and the silver tube assembly 2 is limited by the limiting step 103 and passes through the base accommodating chamber 101. The bottom of the base 21 of the silver tube assembly 2 has a flange, and the flange is against the limiting step 103, so that the silver tube assembly 2 is limited by the limiting step 103. Among them, the heating tube accommodating chamber 102 is used to accommodate the gutta-percha heating tube, and the base accommodating chamber 101 is used to accommodate the second end of the silver tube assembly 2, and the silver tube assembly 2 is used to be connected to the gutta-percha heating tube. The gutta-percha heating tube injects gutta-percha into the base 21 of the silver tube assembly 2, so that the gutta-percha enters the silver tube 23 of the silver tube assembly 2. There is a gap between the outer wall of the gutta-percha heating tube and the inner wall of the heating tube accommodating chamber 102, so the heating tube accommodating chamber 102 can also play a heat insulation effect.

[0069] The base 1 also has a second annular insulation cavity 12 , which surrounds the base accommodating cavity 101 . The second annular insulation cavity 12 has a third opening 120 on the side facing the heating tube accommodating cavity 102 , and the third opening 120 is connected to the heating tube accommodating cavity 102 .

[0070] like Figure 5As shown, after the gutta-percha is injected into the base 21, the heat of the gutta-percha will be transferred to the base accommodating chamber 101 through the base 21, so that the temperature of the inner wall of the base accommodating chamber 101 increases. The second annular heat-insulating chamber 12 surrounds the base accommodating chamber 101, that is, the second annular heat-insulating chamber 12 is located between the side wall of the base accommodating chamber 101 and the outer wall of the base 1. In this way, the heat on the inner wall of the base accommodating chamber 101 will be hindered by the second annular heat-insulating chamber 12 during the process of transferring to the outer wall of the base 1, so that the heat in the base accommodating chamber 101 is difficult to transfer to the outer wall of the base 1. In addition, the heat on the side wall of the second annular heat-insulating chamber 12 close to the base accommodating chamber 101 can also be dissipated to the outside of the base 1 through the third opening 120 and the heating tube accommodating chamber 102, thereby further reducing the temperature of the outer wall of the base 1.

[0071] The second annular heat-insulating cavity 12 is communicated with the heating tube accommodating cavity 102 , which can facilitate the manufacture of the second annular heat-insulating cavity 12 , thereby reducing the complexity of manufacturing the base 1 .

[0072] In some examples, such as Figure 6 As shown, the inner diameter D3 of the outer cavity wall of the second annular heat-insulating cavity 12 is less than or equal to the inner diameter D4 of the heating tube accommodating cavity 102. In this way, the second annular heat-insulating cavity 12 can be easily manufactured.

[0073] In some examples, such as Figure 1 Figure 4 As shown, the gutta-percha filling instrument further includes a rotating head 3, which is rotatably connected to the base 1, and is used to drive the silver tube assembly 2 to rotate relative to the base 1. Therefore, in order to further prevent the gutta-percha filling instrument from harming the patient's oral cavity, a heat insulation structure is also provided on the rotating head 3 in the disclosed embodiment.

[0074] In some examples, such as Figure 1 , Figure 4 , Fig. 9 and Fig.10 As shown, the rotating head 3 includes a cap body 31 and a column 32. The column 32 is fixed inside the cap body 31, and the silver tube assembly 2 passes through the column 32. An annular third annular heat-insulating cavity 33 is formed between the cap body 31 and the column 32, and the third annular heat-insulating cavity 33 has a fourth opening 330 on the side facing the base 1.

[0075] In the process of assembling the rotating head 3 and the silver tube assembly 2 together, the column 32 plays a guiding and limiting role. After the gutta-percha is injected into the silver tube assembly 2, the heat of the gutta-percha will be transferred to the column 32 through the silver tube assembly 2. Since there is a third annular heat-insulating cavity 33 between the column 32 and the cap body 31, when the heat on the column 32 is transferred to the cap body 31, it will be hindered by the third annular heat-insulating cavity 33. As a result, it is difficult for the heat on the column 32 to dissipate, and the temperature of the cap body 31 is relatively low.

[0076] When using the gutta-percha filling instrument, the rotating head 3 needs to drive the silver tube assembly 2 to rotate. Figure 1 , Figure 4 , Fig. 9 and Fig.10 As shown, in order to realize the transmission connection between the rotating head 3 and the silver tube assembly 2, the gutta-percha filling instrument also includes a clamping piece 4. The clamping piece 4 is clamped inside the cap body 31, and the silver tube assembly 2 passes through the clamping piece 4 and is clamped with the clamping piece 4. A part of the clamping piece 4 is opposite to the column 32, and the other part is opposite to the fourth opening 330 of the third annular heat-insulating cavity 33. In this way, the contact area between the clamping piece 4 and the rotating head 3 can be reduced. Thereby reducing the heat transferred from the clamping piece 4 to the rotating head 3, thereby preventing the rotating head 3 from scalding the patient's oral cavity.

[0077] For example, Fig.10 As shown, the opening of the third annular heat-insulating cavity 33 faces the base 1. In this way, the surface shape of the cap body 31 is not damaged, and foreign matter can be prevented from entering the third annular heat-insulating cavity 33. In addition, the side wall of the third annular heat-insulating cavity 33 can be prevented from scraping the patient's oral cavity.

[0078] In some examples, such as Fig.10 As shown, there is a gap 40 between the clamping piece 4 and the column 32. When the clamping piece 4 transfers heat to the column 32, it will be hindered by the gap 40, thereby reducing the heat transferred from the clamping piece 4 to the column 32. In turn, the heat transferred from the column 32 to the cap body 31 is reduced, preventing the cap body 31 from scalding the patient's mouth.

[0079] Since the clamping piece 4 is in contact with both the silver tube assembly 2 and the cap body 31, in order to reduce the heat transferred from the silver tube assembly 2 to the outer wall of the cap body 31 through the clamping piece 4, the cap body 31 also has an annular fourth annular heat-insulating cavity 311, such as Fig.10 The fourth annular heat-insulating cavity 311 has a fifth opening 3110 on the side facing the base 1 , and the fourth annular heat-insulating cavity 311 surrounds the clamping piece 4 .

[0080] By setting the fifth opening 3110 toward the base 1, the surface shape of the cap body 31 is not damaged, and the fifth opening 3110 can be closed by the base 1, thereby preventing foreign matter from entering the fourth annular heat insulation cavity 311. In addition, the side wall of the fourth annular heat insulation cavity 311 can be prevented from scraping the patient's mouth.

[0081] Next, the implementation method of the clamping connection between the clamping piece 4, the cap body 31 and the silver tube assembly 2 is described by way of example.

[0082] In some examples, such as Fig.11As shown, the circumference of the outer periphery of the clamping piece 4 has at least one first protrusion 41, and the inner side of the cap body 31 has at least one first groove 312. Each first protrusion 41 is located in a first groove 312, thereby realizing the circumferential clamping of the clamping piece 4 and the cap body 31. The inner side of the cap body 31 also has at least one second protrusion 313, and the circumference of the outer periphery of the clamping piece 4 also has at least one third protrusion 42. The second protrusion 313 of the cap body 31 is located on the side of the third protrusion 42 close to the base 1, and the second protrusion 313 is against the third protrusion 42, thereby realizing the axial clamping of the clamping piece 4 and the cap body 31. In this way, when the rotating head 3 rotates, the cap body 31 can drive the clamping piece 4 to rotate.

[0083] Exemplarily, the inner side of the cap body 31 has three second protrusions 313, and the three second protrusions 313 are evenly distributed along the circumference of the cap body 31. The circumference of the outer periphery of the clamping piece 4 has three third protrusions 42, and the three third protrusions 42 are evenly distributed along the circumference of the clamping piece 4. Each second protrusion 313 is against a third protrusion 42, thereby strengthening the connection strength between the clamping piece 4 and the cap body 31.

[0084] In some examples, such as Fig.12 As shown, the rotating tube 22 of the silver tube assembly 2 has two second grooves 221, and the two second grooves 221 face opposite directions. The clamping piece 4 has a clamping hole 43, and one end of the clamping hole 43 has a sixth opening 430. The rotating tube 22 of the silver tube assembly 2 slides into the clamping hole 43 through the sixth opening 430, and the parts of the clamping piece 4 on both sides of the clamping hole 43 extend into the two second grooves 221. Thus, the clamping piece 4 and the silver tube assembly 2 are clamped in the circumferential and axial directions, so that the cap body 31 can drive the silver tube assembly 2 to rotate through the clamping piece 4.

[0085] In some examples, such as Figure 1 and Figure 2 As shown, the gutta-percha filling instrument further includes a sealing ring 5. The base 1 has a sealing groove 13, and the sealing ring 5 is located in the sealing groove 13, so that the sealing ring 5 is located between the base 1 and the rotating head 3. Thereby, the sealing between the rotating head 3 and the base 1 is ensured to prevent the gutta-percha from leaking.

[0086] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A gutta-percha filling instrument, characterized in that: The gutta-percha filling instrument comprises a base (1) and a silver tube assembly (2); The base (1) has a containing cavity (10) and a first annular heat-insulating cavity (11), and the first end of the silver tube assembly (2) is located inside the containing cavity (10); The first annular heat-insulating cavity (11) surrounds the accommodating cavity (10), and the first annular heat-insulating cavity (11) has an opening on one side facing toward or away from the second end of the silver tube assembly (2).

2. The gutta-percha filling instrument according to claim 1, characterized in that: The first annular heat-insulating cavity (11) comprises at least one of a first sub-heat-insulating cavity (111) and a second sub-heat-insulating cavity (112); The first sub-insulation cavity (111) surrounds the accommodating cavity (10), and the first sub-insulation cavity (111) has a first opening (1110) on a side facing away from the second end of the silver tube assembly (2); The second sub-insulation cavity (112) surrounds the accommodating cavity (10), and the second sub-insulation cavity (112) has a second opening (1120) on a side facing the second end of the silver tube assembly (2).

3. The gutta-percha filling instrument according to claim 2, characterized in that: The first annular heat-insulating cavity (11) comprises the first sub-heat-insulating cavity (111) and the second sub-heat-insulating cavity (112); There is an axial distance D between one end of the first sub-insulation cavity (111) facing away from the first opening (1110) and one end of the second sub-insulation cavity (112) facing away from the second opening (1120).

4. The gutta-percha filling instrument according to claim 3, characterized in that: The outer diameter of the base (1) gradually decreases in a direction approaching the second end of the silver tube assembly (2); The inner diameter D1 of the first sub-insulation cavity (111) is greater than the inner diameter D2 of the second sub-insulation cavity (112).

5. The gutta-percha filling instrument according to claim 1, characterized in that: The accommodating chamber (10) comprises a base accommodating chamber (101) and a heating tube accommodating chamber (102); the inner diameter of the base accommodating chamber (101) is smaller than the inner diameter of the heating tube accommodating chamber (102); a limiting step (103) is formed between the base accommodating chamber (101) and the heating tube accommodating chamber (102); the silver tube assembly (2) is limited by the limiting step (103) and passes through the base accommodating chamber (101); the heating tube accommodating chamber (102) is used to accommodate a gutta-percha heating tube; the base accommodating chamber (101) is used to accommodate a second end of the silver tube assembly (2); and the silver tube assembly (2) is used to be connected to the gutta-percha heating tube; The base (1) further comprises a second annular heat-insulating cavity (12), the second annular heat-insulating cavity (12) surrounds the base accommodating cavity (101), the second annular heat-insulating cavity (12) comprises a third opening (120) on a side facing the heating tube accommodating cavity (102), and the third opening (120) is connected to the heating tube accommodating cavity (102).

6. The gutta-percha filling instrument according to claim 5, characterized in that: The inner diameter D3 of the outer cavity wall of the second annular heat-insulating cavity (12) is smaller than or equal to the inner diameter D4 of the heating tube accommodating cavity (102).

7. The gutta-percha filling instrument according to any one of claims 1 to 6, characterized in that: The gutta-percha filling instrument further comprises a rotating head (3), wherein the rotating head (3) is rotatably connected to the base (1); The rotating head (3) comprises a cap body (31) and a column body (32); The column (32) is fixed inside the cap body (31), and the silver tube assembly (2) passes through the column (32); A third annular heat-insulating cavity (33) is formed between the cap body (31) and the column body (32), and the third annular heat-insulating cavity (33) has a fourth opening (330) on a side facing the base (1).

8. The gutta-percha filling instrument according to claim 7, characterized in that: The gutta-percha filling instrument further comprises a clamping piece (4); The clamping piece (4) is clamped inside the cap body (31), and the silver tube assembly (2) passes through the clamping piece (4) and is clamped with the clamping piece (4); A portion of the clamping piece (4) is opposite to the column (32), and another portion is opposite to the fourth opening (330) of the third annular heat-insulating cavity (33).

9. The gutta-percha filling instrument according to claim 8, characterized in that: There is a gap (40) between the clamping piece (4) and the column (32).

10. The gutta-percha filling instrument according to claim 8, characterized in that: The cap body (31) further comprises a fourth annular heat-insulating cavity (311), the fourth annular heat-insulating cavity (311) having a fifth opening (3110) on a side facing the base (1), and the fourth annular heat-insulating cavity (311) surrounds the clamping piece (4).

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