Gutta-percha sealing structure and gutta-percha filling instrument

Abstract

The utility model provides a gutta-percha sealing structure, and belongs to the technical field of medical instruments. The gutta-percha sealing structure comprises a gutta-percha bin, a push rod and a sealing ring; the gutta-percha bin is provided with a first channel, a second channel and a third channel which are sequentially communicated, and the diameter of the second channel is larger than that of the first channel and that of the third channel; the push rod penetrates through the first channel and the second channel and is in sliding connection with the third channel, and an annular containing space is formed between the outer wall of the push rod and the inner wall of the second channel; the sealing ring is located in the annular containing space, the inner wall of the sealing ring is attached to the outer wall of the push rod, the outer wall of the sealing ring is attached to the inner wall of the second channel, the sealing ring is provided with a groove, and a groove opening of the groove faces the third channel. By adopting the gutta-percha filling instrument, the leakage of gutta-percha is reduced, the working stability of the gutta-percha filling instrument is improved, and the service life is prolonged.

Description

Technical Field

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

[0002] The gutta-percha filling instrument is an important instrument for root canal treatment. The gutta-percha sealing structure of the gutta-percha filling instrument includes a gutta-percha chamber and a push rod, one end of which is located in the gutta-percha chamber. When in use, the gutta-percha stick is placed in the gutta-percha chamber to be heated and melted, and then the melted gutta-percha is pushed out of the gutta-percha chamber to the tooth root through the push rod.

[0003] Typically, the gutta-percha filling instrument also includes an annular sealing ring disposed between the inner wall of the gutta-percha chamber and the push rod, for sealing the gap between the gutta-percha chamber and the push rod, thereby preventing the melted gutta-percha from entering other components of the gutta-percha filling instrument through the gap and causing damage to other components.

[0004] However, during the use of the gutta-percha filling instrument, the sealing effect of the annular sealing ring is poor, and a portion of the gutta-percha will still leak into other components as the push rod retracts, reducing the working stability and service life of the gutta-percha filling instrument. Utility Model Content

[0005] The disclosed embodiment provides a gutta-percha sealing structure and a gutta-percha filling device, which can reduce the leakage of gutta-percha and improve the working stability and service life of the gutta-percha filling device. The technical solution is as follows:

[0006] On the one hand, an embodiment of the present disclosure provides a gutta-percha sealing structure, the gutta-percha sealing structure comprising a gutta-percha tank, a push rod and a sealing ring;

[0007] The gutta-percha tank has a first channel, a second channel and a third channel which are connected in sequence, and the diameter of the second channel is larger than the diameter of the first channel and the diameter of the third channel;

[0008] The push rod passes through the first channel and the second channel and is slidably connected to the third channel, and an annular accommodation space is formed between the outer wall of the push rod and the inner wall of the second channel;

[0009] The sealing ring is located in the annular accommodating space, the inner wall of the sealing ring is in contact with the outer wall of the push rod, the outer wall of the sealing ring is in contact with the inner wall of the second channel, and the sealing ring has a groove, the notch of the groove faces the third channel.

[0010] In one possible implementation, the sealing ring includes an inner ring and an outer ring, and one end of the inner ring close to the bottom of the groove is connected to one end of the outer ring close to the bottom of the groove to form the groove between the inner ring and the outer ring, and the groove is an annular structure, and the groove, the inner ring and the outer ring are coaxially arranged, the inner ring is in contact with the outer wall of the push rod, and the outer ring is in contact with the inner wall of the second channel.

[0011] In a possible implementation, the sealing ring further includes a spring, which is an annular structure. The spring is located in the groove and is coaxially arranged with the groove. Two elastic force application surfaces of the spring are respectively in contact with the inner ring and the outer ring.

[0012] In a possible implementation manner, the cross-section of the spring is U-shaped or V-shaped.

[0013] In a possible implementation, two elastic force action surfaces of the spring are respectively in contact with a position of the inner ring close to the notch of the groove and a position of the outer ring close to the notch of the groove.

[0014] In one possible implementation, the gutta-percha chamber includes a gutta-percha heating tube and a connecting seat, the gutta-percha heating tube has the second channel and the third channel, the connecting seat has the first channel, and the connecting seat cooperates with an end of the gutta-percha heating tube close to the second channel.

[0015] In one possible implementation, the gutta-percha chamber includes a gutta-percha heating tube and a connecting seat, the gutta-percha heating tube has the third channel, the connecting seat has the first channel and the second channel, and one end of the connecting seat close to the second channel cooperates with the gutta-percha heating tube.

[0016] In a possible implementation, the gutta-percha sealing structure further includes a heat-insulating cylinder;

[0017] The heat-insulating tube is sleeved on at least part of the outer side of the gutta-percha heating tube and the outer side of the connecting seat, and one end of the heat-insulating tube is connected to the gutta-percha heating tube.

[0018] In a possible implementation, the outer wall of the gutta-percha heating cylinder has a first annular protrusion;

[0019] The connecting seat includes a tube column and a cover plate, the inner wall of the tube column matches the outer wall of the gutta-percha heating tube, the cover plate is connected to an end of the tube column away from the gutta-percha heating tube, and the cover plate has the first channel;

[0020] A second annular protrusion is provided on the inner wall of the heat-insulating cylinder, and the second annular protrusion is clamped between the first annular protrusion and the pipe column.

[0021] In a possible implementation, the first annular protrusion has a first clamping groove;

[0022] The second annular protrusion has a first clamping block, and the first clamping block is located in the first clamping groove.

[0023] In a possible implementation, the inner wall of the tube column is threadedly connected to the outer wall of the gutta-percha heating tube.

[0024] In a possible implementation, a temperature collection groove is provided on the outer wall of the gutta-percha heating tube at a position corresponding to the second annular protrusion;

[0025] The gutta-percha sealing structure also includes a temperature sensor having a detection probe. The detection probe is located in the temperature sampling tank and is in contact with the gutta-percha heating tube.

[0026] On the other hand, an embodiment of the present disclosure provides a gutta-percha filling instrument, the gutta-percha filling instrument comprising a filling instrument body and a gutta-percha sealing structure as described in any one of the above items;

[0027] The gutta-percha sealing structure is connected to the filling instrument body.

[0028] In a possible implementation, the filling instrument body includes a slide cylinder and a drive assembly, an end surface of one end of the slide cylinder has a second clamping groove, the drive assembly is at least partially located in the slide cylinder, the drive assembly is connected to the slide cylinder, and is transmission-connected to the push rod;

[0029] In the case where the gutta-percha filling instrument includes an insulating tube, an end surface of the insulating tube away from the gutta-percha heating tube has a second clamping block, and the second clamping block is located in the second clamping groove.

[0030] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0031] The disclosed embodiment provides a gutta-percha sealing structure, in which the inner wall of the sealing ring is always in contact with the outer wall of the push rod during the process of the push rod pushing out the gutta-percha in the gutta-percha bin and then retracting, and the gutta-percha attached to the outer wall of the push rod will flow into the groove as the push rod and the inner wall of the sealing ring move relative to each other. In this way, on the one hand, the gutta-percha flows into the groove, thereby reducing the gutta-percha leakage to other components, and on the other hand, the gutta-percha flowing into the groove will squeeze the inner wall of the groove, causing the sealing ring to expand, thereby making the inner wall of the sealing ring and the push rod, and the outer wall of the sealing ring and the inner wall of the second channel fit more closely, thereby improving the sealing effect between the inner wall of the sealing ring and the push rod, and between the outer wall of the sealing ring and the inner wall of the second channel, and forming a virtuous circle in these two aspects, thereby improving the sealing effect, reducing the gutta-percha leakage, and further improving the working stability and service life of the gutta-percha filling instrument.

[0032] 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

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 is an exploded schematic diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0035] Figure 2 is a schematic cross-sectional structure diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0036] Figure 3 is an exploded schematic diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0037] Figure 4 is an exploded schematic diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0038] Figure 5 is a schematic cross-sectional structure diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0039] Figure 6 is an exploded schematic diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0040] Figure 7 is an exploded schematic diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0041] Figure 8 is a schematic cross-sectional structure diagram of a gutta-percha sealing structure shown in an embodiment of the present disclosure;

[0042] Fig. 9 This embodiment of the present disclosure shows Figure 8 Schematic diagram of the local enlarged structure of part A.

[0043] Legend

[0044] 1. Gutta-percha warehouse;

[0045] 11. First channel; 12. Second channel; 13. Third channel; 14. Gutta-percha heating tube; 15. Connecting seat;

[0046] 141, first annular protrusion; 142, first clamping groove; 143, temperature sampling groove;

[0047] 151, pipe column; 152, cover plate;

[0048] 3. Putting;

[0049] 4. Sealing ring;

[0050] 41. groove; 42. inner ring; 43. outer ring; 44. spring;

[0051] 5. Insulation tube;

[0052] 51. second annular protrusion; 52. second clamping block;

[0053] 511, first clamping block;

[0054] 6. Temperature sensor;

[0055] 61. Detection probe; 62. Temperature sampling line; 63. Processing circuit;

[0056] 7. Slide barrel;

[0057] 71. Second card slot. DETAILED DESCRIPTION

[0058] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons 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 limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words 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.

[0059] 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.

[0060] The present disclosure provides a gutta-percha sealing structure. Figure 1 The gutta-percha sealing structure includes a gutta-percha chamber 1, a push rod 3 and a sealing ring 4. The positional connection relationship of each component can be seen in Figure 2 The gutta-percha 1 has a first channel 11, a second channel 12 and a third channel 13 which are connected in sequence, and the diameter of the second channel 12 is larger than the diameter of the first channel 11 and the diameter of the third channel 13. The push rod 3 passes through the first channel 11 and the second channel 12, and is slidably connected with the third channel 13, and an annular accommodation space is formed between the outer wall of the push rod 3 and the inner wall of the second channel 12. The sealing ring 4 is located in the annular accommodation space, and the inner wall of the sealing ring 4 is in contact with the outer wall of the push rod 3, and the outer wall of the sealing ring 4 is in contact with the inner wall of the second channel 12. The sealing ring 4 has a groove 41, and the notch of the groove 41 faces the third channel 13.

[0061] When the gutta-percha filling instrument is working, the gutta-percha chamber 1 heats and melts the gutta-percha stick, and the push rod 3 extends from the initial position to push the melted gutta-percha to flow out of the gutta-percha chamber 1. When the melted gutta-percha is completely pushed out, the push rod 3 retracts to the initial position. During the retraction of the push rod 3, the sealing ring 4 can seal between the push rod 3 and the gutta-percha chamber 1, thereby preventing the residual gutta-percha from leaking into other components in the gutta-percha filling instrument as the push rod 3 retracts, thereby causing damage to other components.

[0062] See also Figure 2The gutta-percha tank 1 has a first channel 11, a second channel 12 and a third channel 13 which are connected in sequence, and a diameter of the second channel 12 is greater than that of the first channel 11 and the third channel 13.

[0063] The gutta-percha tank 1 may have a cylindrical structure. The first channel 11, the second channel 12, and the third channel 13 may be channels with circular cross-sections, and may be coaxially arranged with the cylindrical structure.

[0064] The gutta-percha cartridge 1 may be an integrally formed structure, or may be a plurality of components connected together by various connection methods (eg, snap connection, welding connection, etc.).

[0065] The gutta-percha tank 1 can be made of any reasonable material with good thermal conductivity and hardness that meets the requirements, for example, it can be made of metal, etc., and the embodiments of the present disclosure do not make specific limitations on this.

[0066] The third channel 13 is used to accommodate the gutta-percha stick, and the portion corresponding to the third channel on the gutta-percha bin 1 is also used to heat the gutta-percha stick to melt it. Therefore, the portion corresponding to the third channel on the gutta-percha bin 1 may also be provided with a heating wire, which is wrapped around the portion to heat and melt the gutta-percha stick. Of course, in addition to using the heating wire, the device for heating the gutta-percha stick may also be any other reasonable device, which is not specifically limited in the embodiments of the present disclosure.

[0067] See also Figure 2 The push rod 3 passes through the first channel 11 and the second channel 12 and is slidably connected with the third channel 13. That is, after the push rod 3 passes through the first channel 11 and the second channel 12, it is inserted into the third channel 13.

[0068] When the gutta-percha filling instrument is working, the push rod 3 can slide in the third channel 13 to push the melted gutta-percha in the third channel 13 out of the third channel 13 , or retract after pushing all the gutta-percha out of the third channel 13 .

[0069] The outer wall of the push rod 3 and the inner wall of the third channel 13 can be clearance-matched, so that the third channel 13 can fix the position of the push rod 3 and enable the push rod 3 to slide in the third channel 13 .

[0070] In a possible implementation, the push rod 3 may also be slidably connected to the first channel 11. The outer wall of the push rod 3 and the inner wall of the first channel 11 may be clearance-matched, so that the first channel 11 can further fix the position of the push rod 3, improve the stability of the push rod 3 during sliding, and enable the push rod 3 to slide in the first channel 11.

[0071] It is understandable that the embodiment of the present disclosure does not specifically limit the diameter of the first channel 11 and the diameter of the third channel 13 , and the two may be equal or unequal, and may be set accordingly according to actual needs and structures.

[0072] The diameter of the second channel 12 is larger than the diameter of the first channel 11 and the diameter of the third channel 13 , so that an annular accommodation space can be formed between the outer wall of the push rod 3 and the inner wall of the second channel 12 for accommodating the sealing ring 4 to be described later.

[0073] The push rod 3 can be made of any reasonable material with hardness that meets the requirements, for example, it can be made of metal, etc., and the embodiments of the present disclosure do not make specific limitations on this.

[0074] The push rod 3 may have a rod-shaped structure, the interior of which may be hollow to reduce weight, but one end of the push rod 3 for pushing out the gutta-percha is closed to prevent the melted gutta-percha from entering the interior of the push rod 3 .

[0075] See also Figure 2 The sealing ring 4 is located in the annular accommodation space. The inner wall of the sealing ring 4 is in contact with the outer wall of the push rod 3, and the outer wall of the sealing ring 4 is in contact with the inner wall of the second channel 12. In this way, the sealing ring 4 realizes a sealed connection between the outer wall of the push rod 3 and the inner wall of the second channel 12 of the gutta-percha tank 1.

[0076] The sealing ring 4 has a groove 41 , and the notch of the groove 41 faces the third channel 13 .

[0077] When the gutta-percha filling instrument is working, during the process of the push rod 3 pushing the gutta-percha in the third channel 13 out and then retracting, the inner wall of the sealing ring 4 is always in contact with the outer wall of the push rod 3, and the gutta-percha adhered to the outer wall of the push rod 3 will flow into the groove 41 as the push rod 3 and the inner wall of the sealing ring 4 move relative to each other.

[0078] In this way, on the one hand, the gutta-percha flows into the groove 41, thereby reducing the leakage of the gutta-percha to other components; on the other hand, the gutta-percha flowing into the groove 41 will squeeze the inner wall of the groove 41, thereby making the inner wall of the sealing ring 4 and the push rod 3, as well as the outer wall of the sealing ring 4 and the inner wall of the second channel 12 fit more closely, thereby improving the sealing effect between the inner wall of the sealing ring and the push rod 3, as well as the outer wall of the sealing ring 4 and the inner wall of the second channel 12.

[0079] The above two aspects form a virtuous circle, thereby improving the sealing effect between the push rod 3 and the gutta-percha chamber 1, reducing the leakage of the gutta-percha, and further improving the working stability and service life of the gutta-percha filling instrument.

[0080] The sealing ring 4 in the working head provided in the embodiment of the present disclosure may have any reasonable structure. Several reasonable structures of the sealing ring 4 are introduced below:

[0081] In a possible implementation, the sealing ring 4 may have a plurality of grooves 41, which are evenly distributed on the sealing ring 4 along the circumferential direction, and the notches of the plurality of grooves 41 are all facing the third channel 13. In this way, when the push rod 3 retracts, the gutta-percha carried on the push rod 3 can enter the plurality of grooves 41, and the gutta-percha squeezes the inner wall of the groove 41, thereby improving the sealing effect between the inner wall of the sealing ring 4 and the outer wall of the push rod 3, and the sealing effect between the outer wall of the sealing ring 4 and the inner wall of the second channel 12, thereby improving the sealing effect between the push rod 3 and the gutta-percha chamber 1, reducing the leakage of the gutta-percha, and improving the working stability and service life of the gutta-percha filling instrument.

[0082] In another possible implementation, see Figure 1 The sealing ring 4 includes an inner ring 42 and an outer ring 43. One end of the inner ring 42 close to the groove bottom of the groove 41 is connected to one end of the outer ring 43 close to the groove bottom of the groove 41, so that a groove 41 is formed between the inner ring 42 and the outer ring 43. The groove 41 is an annular structure. The groove 41, the inner ring 42 and the outer ring 43 are coaxially arranged. Figure 2 The inner ring 42 is in contact with the outer wall of the push rod 3 , and the outer ring 43 is in contact with the inner wall of the second channel 12 .

[0083] The inner ring 42 and the outer ring 43 may be an integrally formed structure.

[0084] One end of the inner ring 42 close to the bottom of the groove 41 is connected to one end of the outer ring 43 close to the bottom of the groove 41, and one end of the inner ring 42 close to the notch of the groove 41 and one end of the outer ring 43 close to the notch of the groove 41 are openly arranged, so that the groove 41 can be formed between the inner ring 42 and the outer ring 43, and the notch of the groove 41 is between one end of the inner ring 42 close to the notch of the groove 41 and one end of the outer ring 43 close to the notch of the groove 41.

[0085] During the retraction of the push rod 3, the gutta-percha adhered to the outer wall of the push rod 3 will flow into the annular groove 41, squeezing the inner ring 42 and the outer ring 43 to expand the sealing ring 4. The annular structure of the groove 41 enables the gutta-percha to squeeze the inner ring 42 and the outer ring 43 more comprehensively in the circumferential direction, thereby improving the sealing effect of the sealing ring 4, reducing the leakage of the gutta-percha, and improving the working stability and service life of the gutta-percha filling instrument.

[0086] Furthermore, the groove 41 of the annular structure can accommodate more gutta-percha, thereby reducing leakage of the gutta-percha and improving the working stability and service life of the gutta-percha filling instrument.

[0087] The axial length of the inner ring 42 and the outer ring 43 can be equal to the axial length of the annular accommodating space, thereby improving the tightness of the fit between the inner ring 42 and the outer wall of the push rod 3, and between the outer ring 43 and the inner wall of the second channel 12, thereby improving the sealing effect of the sealing ring 4, reducing the leakage of the gutta-percha, and improving the working stability and service life of the gutta-percha filling instrument.

[0088] Of course, the axial length of the inner ring 42 and the outer ring 43 may also be smaller than the axial length of the annular accommodating space, and may be set according to demand and actual structure, and the embodiment of the present disclosure does not specifically limit this.

[0089] The inner ring 42 and the outer wall of the push rod 3 can be fitted together by interference fitting, and similarly, the outer ring 43 and the inner wall of the second channel 12 can be fitted together by interference fitting.

[0090] See also Figure 3 and Figure 4 The sealing ring 4 may further include a spring 44, which is an annular structure. The spring 44 is located in the groove 41 and is coaxially arranged with the groove 41. The two elastic force action surfaces of the spring 44 are respectively in contact with the inner ring 42 and the outer ring 43. It can be understood that since the groove 41 and the spring 44 are both annular structures, the spring 44 is coaxially arranged with the groove 41, which means that the axis of the spring 44 with an annular structure is colinear with the axis of the groove 41 with an annular structure.

[0091] In this way, the spring 44 can support the inner wall of the groove 41, further improving the sealing effect between the inner ring 42 and the outer wall of the push rod 3, and between the outer ring 43 and the inner wall of the second channel 12, thereby improving the sealing effect between the push rod 3 and the inner wall of the second channel 12, reducing the leakage of the gutta-percha, and further improving the working stability and service life of the gutta-percha filling instrument.

[0092] The cross section of the spring 44 may be U-shaped or V-shaped (see Figure 5 In this way, the two elastic force action surfaces of the spring 44 can apply elastic force to the inner ring 42 and the outer ring 43 respectively, so that the inner ring 42 and the inner wall of the push rod 3, and the outer ring 43 and the outer wall of the second channel 12 fit more closely, thereby improving the sealing effect of the sealing ring 4.

[0093] Moreover, the opening direction of the spring 44 is consistent with the notch direction of the groove 41. In this way, during the retraction of the push rod 3, since the cross-section of the spring 44 is U-shaped or V-shaped, the groove 41 is easier to receive the gutta-percha, which facilitates the gutta-percha to flow into the groove 41, and can increase the capacity of the groove 41 for the gutta-percha, so that the amount of gutta-percha flowing into the groove 41 is increased, thereby increasing the squeezing pressure of the gutta-percha flowing into the groove 41 on the inner ring 42 and the outer ring 43, thereby further improving the sealing effect of the sealing ring 4.

[0094] See also Figure 5 The two elastic force action surfaces of the spring 44 can be respectively in contact with the position of the notch of the inner ring 42 close to the groove 41 and the position of the notch of the outer ring 43 close to the groove 41.

[0095] One of the elastic force action surfaces of the spring 44 can apply elastic force to the position of the notch of the inner ring 42 close to the groove 41, so that the position of the notch of the inner ring 42 close to the groove 41 fits with the outer wall of the push rod 3. In this way, during the retraction of the push rod 3, the gutta-percha adhesive on the outer wall of the push rod 3 can more easily enter the groove 41, thereby improving the sealing effect of the sealing ring 4.

[0096] Another elastic force action surface of the spring 44 can apply elastic force to the position of the notch of the outer ring 43 close to the groove 41, so that the position of the notch of the outer ring 43 close to the groove 41 fits with the inner wall of the second channel 12, thereby making it easier for the gutta-percha to fill the groove 41 and squeeze the inner ring 42 and the outer ring 43 over a large area, thereby tightening the sealing ring 4 and improving the sealing effect of the sealing ring 4.

[0097] When the cross section of the spring 44 is U-shaped or V-shaped, the middle bend of the spring 44 can be in contact with the bottom of the groove 41, and the two elastic force action surfaces of the spring 44 can be in contact with the position of the inner ring 42 close to the notch of the groove 41 and the position of the outer ring 43 close to the notch of the groove 41. In this way, the space of the groove 41 that can accommodate the gutta-percha is further increased, the expansion effect of the gutta-percha on the sealing ring 4 is improved, and thus the sealing effect of the sealing ring 4 is improved.

[0098] The above structures are merely examples of several possible structures of the sealing ring 4 in the embodiment of the present disclosure. The sealing ring 4 may also have other reasonable structures, which are not specifically limited in the embodiment of the present disclosure.

[0099] The structure of the gutta-percha tank 1 in the embodiment of the present disclosure may be any reasonable structure. Several possible structures thereof are introduced below:

[0100] In a possible implementation, the gutta-percha cartridge 1 may be an integrally formed structure (not shown in the figure).

[0101] In this way, since the diameter of the second channel 12 is larger than the diameter of the first channel 11 and the diameter of the third channel 13, a first step structure can be formed between the third channel 13 and the second channel 12, and a second step structure can be formed between the second channel 12 and the first channel 11. The outer wall of the push rod 3, the inner wall of the second channel 12, the end face of the first step structure facing the second channel 12, and the end face of the second step structure facing the second channel 12 form the above-mentioned annular accommodating space.

[0102] When the sealing ring 4 is located in the annular accommodating space, one end of the outer ring 43 of the sealing ring 4 close to the notch of the groove 41 can be in contact with the end face of the first step structure facing the second channel 12, and one end of the sealing ring 4 close to the bottom of the groove 41 can be in contact with the end face of the second step structure facing the second channel 12.

[0103] In this way, the end surface of the first step structure facing the second channel 12 and the end surface of the second step structure facing the second channel 12 limit the sealing ring 4 in the annular accommodating space, thereby preventing the sealing ring 4 from moving with the push rod 3 and causing leakage of the gutta-percha.

[0104] In another possible implementation, the gutta-percha cartridge 1 may include a gutta-percha heating cartridge 14 and a connecting seat 15. Figure 3 and Figure 4 The gutta-percha heating tube 14 has a second channel 12 and a third channel 13 , and the connecting seat 15 has a first channel 11 . The connecting seat 15 cooperates with an end of the gutta-percha heating tube 14 close to the second channel 12 .

[0105] In this way, the connecting seat 15 can block the end of the gutta-percha heating tube 14 close to the second channel 12 to a certain extent, so that the sealing ring 4 can be limited in the annular accommodating space to a certain extent, thereby improving the stability of the seal.

[0106] Furthermore, the structure in which the gutta-percha heating tube 14 and the connecting seat 15 are connected is more convenient for installing the sealing ring 4. After the sealing ring 4 is installed into the second channel 12, the gutta-percha heating tube 14 and the connecting seat 15 can be connected together, thereby improving the convenience of disassembly and assembly.

[0107] The connection structure between the connection seat 15 and the gutta-percha heating tube 14 can be any reasonable connection structure, for example, it can be a welding connection, a threaded connection or a snap-on connection, etc.

[0108] The connection base 15 can be made of any reasonable material with hardness that meets the requirements, for example, it can be made of metal.

[0109] The connection seat 15 can be any reasonable structure. For example, the connection seat 15 can have a plate-like structure, or a cylindrical structure with one end closed, etc. The specific structure of the connection seat 15 can be set according to needs and actual structure.

[0110] In another possible implementation, the gutta-percha chamber 1 may include a gutta-percha heating tube 14 and a connecting seat 15, the gutta-percha heating tube 14 having a third channel 13, the connecting seat 15 having a first channel 11 and a second channel 12, and an end of the connecting seat 15 close to the second channel 12 cooperates with the gutta-percha heating tube 14 (this structure is not shown in the figure).

[0111] In this way, the gutta-percha heating tube 14 can block the end of the connecting seat 15 close to the second channel 12 to a certain extent, so that the sealing ring 4 can be limited in the annular accommodating space to a certain extent, thereby improving the stability of the seal.

[0112] Furthermore, the structure in which the gutta-percha heating tube 14 and the connecting seat 15 are connected makes it easier to install the sealing ring 4, thereby improving the convenience of assembly and disassembly.

[0113] The connection structure between the connection seat 15 and the gutta-percha heating tube 14 can be any reasonable connection structure, for example, it can be a welding connection, a threaded connection or a snap-on connection, etc.

[0114] The connection base 15 can be made of any reasonable material with hardness that meets the requirements, for example, it can be made of metal.

[0115] The connection seat 15 can be any reasonable structure. For example, the connection seat 15 can have a plate-like structure, or a cylindrical structure with one end closed, etc. The specific structure of the connection seat 2 can be set according to needs and actual structure.

[0116] Below, several possible connection structures between the connection seat 15 and the gutta-percha heating tube 14 are introduced:

[0117] In one possible implementation, see Figure 3 The structure of the connecting seat 15 can be: the connecting seat 15 can include a tube column 151 and a cover plate 152, the tube column 151 has an annular structure, the side wall of the tube column 151 cooperates with the side wall of the gutta-percha heating tube 14, the cover plate 152 is connected to the end of the tube column 151 away from the gutta-percha heating tube 14, and the cover plate 152 has a first channel 11.

[0118] Among them, the side wall of the tube column 151 cooperates with the side wall of the gutta-percha heating tube 14 to achieve a fixed connection between the tube column 151 and the gutta-percha heating tube 14, and its structure can be any reasonable structure, which is not limited in the embodiments of the present disclosure.

[0119] In some prior arts, the annular sealing ring is axially clamped between the gutta-percha bin and other components, and the inner wall of the annular sealing ring contacts the outer wall of the push rod to achieve sealing. However, the sealing structure also requires end face sealing, and the end face sealing structure is complex, especially the axial part of the end face has many parts, gaps between the fittings, etc., resulting in poor end face sealing. In addition, most annular sealing rings also have poor radial sealing. Therefore, the melted gutta-percha is easy to leak out from the gap between the annular sealing ring and the end face of the gutta-percha bin, and the gap between the annular sealing ring and the end faces of the other components, resulting in poor sealing.

[0120] In the gutta-percha sealing structure provided in the embodiment of the present invention, since the side wall of the tube column 151 cooperates with the side wall of the gutta-percha heating tube 14, the tube column 151 can be a structure in which the tube column 151 is sleeved on the outside of the gutta-percha heating tube 14 and cooperates with the outer wall of the gutta-percha heating tube 14, or the gutta-percha heating tube 14 is sleeved on the outside of the tube column 151 and cooperates with the outer wall of the tube column 151. Either of these two structures can ensure that the sealing ring 4 in the annular accommodating space is not exposed to the outside in the radial direction as in the above-mentioned prior art through the cooperation structure between the side wall of the tube column 151 and the side wall of the gutta-percha heating tube 14, thereby improving the closedness of the annular accommodating space, thereby avoiding the problem of gutta-percha leakage caused by poor end face sealing, and improving the sealing effect of the gutta-percha sealing structure in the embodiment of the present invention.

[0121] Based on the structure of the connection base 15 including the pipe column 151 and the cover plate 152, see Figure 5 , the tube column 151 can be sleeved on the outside of one end of the gutta-percha heating tube 14, and the inner wall of the tube column 151 matches the outer wall of the gutta-percha heating tube 14, that is, the inner wall of the tube column 151 is connected to the outer wall of the gutta-percha heating tube 14 to achieve a fixed connection between the tube column 151 and the gutta-percha heating tube 14. It can be understood that the third channel 13 is located on the gutta-percha heating tube 14, and the second channel 12 can be located on the gutta-percha heating tube 14 or on the tube column 151, and the embodiment of the present disclosure is not limited to this.

[0122] In this way, on the basis of the sealing between the outer wall of the push rod 3 and the inner wall of the second channel 12 of the gutta-percha magazine 1 by the sealing ring 4, a structure is added in which the tube column 151 is ring-shaped on the outside of the gutta-percha heating tube 14 and cooperates with the outer wall of the gutta-percha heating tube 14, which is equivalent to adding a seal in the annular radial direction, thereby further improving the sealing effect of the gutta-percha sealing structure.

[0123] The second channel 12 may be located on the gutta-percha heating tube 14 , and the end surface of the cover plate 152 close to the gutta-percha heating tube 14 may be in contact with the end surface of the gutta-percha heating tube 14 close to the second channel 12 .

[0124] In this way, the structure in which the end surface of the cover plate 152 close to the gutta-percha heating tube 14 is in contact with the end surface of the gutta-percha heating tube 14 close to one end of the second channel 12 is equivalent to adding another seal in the annular axial direction, thereby further improving the sealing effect of the gutta-percha sealing structure.

[0125] Of course, the end surface of the cover plate 152 close to the gutta-percha heating tube 14 can also be set to a structure with a gap between the end surface of the gutta-percha heating tube 14 close to the second channel 12. It can be set according to the actual structure and needs, and the embodiment of the present disclosure is not limited to this.

[0126] One end of the gutta-percha heating tube 14 can be sleeved on the outside of the tube column 151 (not shown in the figure) and matched with the outer wall of the tube column 151, that is, the inner wall of the gutta-percha heating tube 14 is connected to the outer wall of the tube column 151, thereby realizing a fixed connection between the gutta-percha heating tube 14 and the tube column 151. It can be understood that the third channel 13 is located on the gutta-percha heating tube 14, and the second channel 12 can be located on the gutta-percha heating tube 14 or on the tube column 151, which is not limited in the embodiment of the present disclosure.

[0127] In this way, on the basis of the sealing between the outer wall of the push rod 3 and the inner wall of the second channel 12 of the gutta-percha magazine 1 by the sealing ring 4, a gutta-percha heating tube 14 is added, which is ringed on the outside of the tube column 151 and cooperates with the outer wall of the tube column 151, which is equivalent to adding a seal in the annular radial direction, thereby further improving the sealing effect of the gutta-percha sealing structure.

[0128] The second channel 12 is located on the tube column 151. The gutta-percha heating tube 14 may include a first tube section and a second tube section connected to each other, the third channel 13 is located on the first tube section, the second tube section has a fourth channel, the fourth channel is connected to the third channel 13, and the diameter of the fourth channel is greater than the diameter of the third channel 13, so that a step structure is formed between the inner wall of the first tube section and the inner wall of the second tube section. The second tube section can be sleeved on the outside of the tube column 151, and the inner wall of the second tube section matches the outer wall of the tube column 151. In addition, the end face of the tube column 151 close to the first tube section can be in contact with the end face of the step structure, that is, in contact with the end face of the first tube section close to the second tube section.

[0129] In this way, it is equivalent to adding another seal in the annular axial direction, thereby further improving the sealing effect of the gutta-percha sealing structure.

[0130] Of course, the end face of the tube column 151 close to the first barrel section can also be set to a structure with a gap between it and the end face of the first barrel section close to the second barrel section. It can be set according to the actual structure and needs, and the embodiment of the present disclosure is not limited to this.

[0131] It is understandable that the above are only several possible structures of the gutta-percha chamber 1 , and the structure of the gutta-percha chamber 1 may also be any other reasonable structure.

[0132] The gutta-percha sealing structure provided in the embodiment of the present disclosure may also include other components. The following describes several components and structures that the gutta-percha sealing structure may include:

[0133] In one possible implementation, see Figure 5The gutta-percha sealing structure may further include an insulation tube 5. The insulation tube 5 is sleeved on at least part of the outer side of the gutta-percha heating tube 14 and the outer side of the connecting seat 15, and one end of the insulation tube 5 is connected to the gutta-percha heating tube 14.

[0134] The heat-insulating tube 5 may be made of a material with poor thermal conductivity, or a non-metallic material, such as plastic or ceramic, etc. It may be configured according to requirements, and the disclosed embodiment does not specifically limit this.

[0135] In this way, the gutta-percha heating cylinder 14 can be isolated to prevent the heat generated by the portion corresponding to the third channel 13 on the gutta-percha heating cylinder 14 when heating the gutta-percha stick from being transferred to other components in the gutta-percha filling instrument. Since some components in the gutta-percha filling instrument are arranged at the rear of the gutta-percha sealing structure, the heat-insulating cylinder 5 can prevent heat from being transferred to the components at the rear, thereby causing damage to the components; in addition, the rear of the gutta-percha sealing structure also includes a handle portion, which belongs to the user's grip portion, so the heat-insulating cylinder 5 can prevent heat from being transferred to the handle portion, thereby avoiding burns to the user during use, and improving the service life and safety of the gutta-percha filling instrument.

[0136] In a possible implementation, the heat insulating tube 5 can be fixedly connected to the gutta-percha heating tube 14 by screws.

[0137] In another possible implementation, see Figure 5 The outer wall of the gutta-percha heating tube 14 has a first annular protrusion 141 .

[0138] The connecting seat 15 includes a tube column 151 and a cover plate 152 . The inner wall of the tube column 151 matches the outer wall of the gutta-percha heating tube 14 . The cover plate 152 is connected to one end of the tube column 151 away from the gutta-percha heating tube 14 . The cover plate 152 has a first channel 11 .

[0139] A second annular protrusion 51 is provided on the inner wall of the heat insulating tube 5 , and the second annular protrusion 51 is clamped between the first annular protrusion 141 and the pipe column 151 .

[0140] During installation, the push rod 3 can be inserted into the third channel 13 first, and then the sealing ring 4 can be put on the outside of the push rod 3, and the sealing ring 4 can be installed in the annular accommodating space. Then, the end of the insulation tube 5 close to the second annular protrusion 51 can be inserted into the outside of the gutta-percha heating tube 14 until the second annular protrusion 51 is in contact with the first annular protrusion 141. Then, the tube column 151 of the connecting seat 15 can be inserted between the gutta-percha heating tube 14 and the insulation tube 5, and the tube column 151 is connected to the gutta-percha heating tube 14. At this time, the end face of the tube column 151 away from the cover plate 152 will also be in contact with the second annular protrusion 51. In this way, the tube column 151 and the first annular protrusion 141 can clamp the second annular protrusion 51, thereby realizing the fixation between the insulation tube 5 and the gutta-percha heating tube 14.

[0141] The thermal insulation tube 5 is clamped and fixed by the first annular protrusion 141 , the second annular protrusion 51 and the pipe column 151 . The structure is simple and the installation and disassembly are very convenient.

[0142] See also Figure 3 The first annular protrusion 141 has a first clamping groove 142 , and the second annular protrusion 51 has a first clamping block 511 , and the first clamping block 511 is located in the first clamping groove 142 .

[0143] In this way, the relative rotation between the heat insulating cylinder 5 and the gutta-percha heating cylinder 14 is avoided by a simple clamping connection structure, thereby improving the working stability of the gutta-percha filling instrument. In addition, the use of parts such as screws is reduced, the extra space required for screw connection is reduced, and the disassembly efficiency and positioning accuracy are improved.

[0144] The structure that cooperates between the inner wall of the tube column 151 and the outer wall of the gutta-percha heating tube 14 can be any reasonable structure. In one possible implementation, the inner wall of the tube column 151 and the outer wall of the gutta-percha heating tube 14 can be connected by snapping. In another possible implementation, the inner wall of the tube column 151 and the outer wall of the gutta-percha heating tube 14 can be threadedly connected, so that the tube column 151 and the first annular protrusion 141 can be used together to clamp the second annular protrusion 51 by tightening the threads. The connection method is simple and convenient, and the connection stability of the insulation tube 5 is improved. Of course, the structure that cooperates between the inner wall of the tube column 151 and the outer wall of the gutta-percha heating tube 14 can also be other reasonable structures, and the embodiments of the present disclosure do not specifically limit this.

[0145] In the embodiments of the present disclosure, see Figure 5 The working head may further include a temperature sensor 6 having a detection probe 61 , and the detection probe 61 may be in contact with the gutta-percha heating tube 14 , thereby collecting the heating temperature of the gutta-percha heating tube 14 .

[0146] The connection between the detection probe 61 and the gutta-percha heating tube 14 can be: a temperature sampling groove 143 is provided on the outer wall of the gutta-percha heating tube 14 at a position corresponding to the second annular protrusion 51. The detection probe 61 is located in the temperature sampling groove 143 and contacts the gutta-percha heating tube 14.

[0147] That is, during the installation process of the above-mentioned insulation tube 5, before installing the insulation tube 5, it is necessary to first put the detection probe 61 into the temperature sampling groove 143 so that the detection probe 61 contacts the inner wall of the temperature sampling groove 143, and then insert the end of the insulation tube 5 close to the second annular protrusion 51 into the outside of the gutta-percha heating tube 14 until the second annular protrusion 51 is in contact with the first annular protrusion 141. At this time, the position of the second annular protrusion 51 corresponds to the position of the temperature sampling groove 143, so that the second annular protrusion 51 can block the notch of the temperature sampling groove 143, and limit the detection probe 61 in the temperature sampling groove 143, thereby realizing the fixation of the detection probe 61.

[0148] The second annular protrusion 51 not only realizes the fixation between the insulation tube 5 and the gutta-percha heating tube 14, but also realizes the fixation between the detection probe 61 and the gutta-percha heating tube 14. The structure is simple and convenient, and the disassembly and assembly efficiency is improved.

[0149] The shape of the temperature sampling groove 143 can be adapted to the shape of the detection probe 61, so that it is easier to fix the detection probe 61 and can also make the contact between the detection probe 61 and the gutta-percha heating tube 14 more complete, thereby improving the accuracy of the collected temperature.

[0150] The temperature sampling groove 143 can be located at a position on the gutta-percha heating tube 14 corresponding to the third channel 13. Since the gutta-percha stick will be heated at a position on the gutta-percha heating tube 14 corresponding to the third channel 13, the temperature sampling groove 143 is set there so that the temperature detected by the detection probe 61 is more accurate.

[0151] See also Figure 5 The temperature sensor may also have a temperature sampling line 62 and a processing circuit 63. The two ends of the temperature sampling line 62 are electrically connected to the detection probe 61 and the processing circuit 63 respectively, and are used to send the information detected by the detection probe 61 to the processing circuit 63, and then the processing circuit 63 sends it to the controller for processing and storage.

[0152] See also Figure 5 A strip groove is provided on the end surface of the second annular protrusion 51 close to the first annular protrusion 141 , and the temperature sampling wire 62 passes through the strip groove to achieve electrical connection with the detection probe 61 .

[0153] In the embodiment of the present disclosure, the shape of the strip groove can be adapted to the shape of the temperature collection line 62 , so that the temperature collection line 62 is more easily fixed.

[0154] The above structure is only an example of several possible components included in the working head provided in the embodiment of the present disclosure. The working head may also include any other reasonable components, and the embodiment of the present disclosure does not specifically limit this.

[0155] In summary, the disclosed embodiment provides a working head of a gutta-percha filling instrument, in which the inner wall of the sealing ring 4 is always in contact with the outer wall of the pushing rod 3 after the pushing rod 3 pushes out the gutta-percha in the gutta-percha bin 1 and then retracts, and the gutta-percha attached to the outer wall of the pushing rod 3 flows into the groove 41 as the pushing rod 3 and the inner wall of the sealing ring 4 move relative to each other. In this way, on the one hand, the gutta-percha flows into the groove 41, thereby reducing the gutta-percha leakage to other components, and on the other hand, the gutta-percha flowing into the groove 41 squeezes the inner wall of the groove 41, thereby tightening the sealing ring 4, thereby making the inner wall of the sealing ring 4 and the pushing rod 3, and the outer wall of the sealing ring 4 and the inner wall of the second channel 12 fit more closely, thereby improving the sealing effect between the inner wall of the sealing ring 4 and the pushing rod 3, and the outer wall of the sealing ring 4 and the inner wall of the second channel 12, and forming a virtuous circle in the two aspects, thereby improving the sealing effect, reducing the gutta-percha leakage, and further improving the working stability and service life of the gutta-percha filling instrument.

[0156] The disclosed embodiment also provides a gutta-percha filling instrument, which may include a filling instrument body and any of the above-mentioned gutta-percha sealing structures, wherein the gutta-percha sealing structure is connected to the filling instrument body.

[0157] In a possible implementation, when the gutta-percha filling instrument includes the heat-insulating cylinder 5 , one end of the heat-insulating cylinder 5 away from the gutta-percha heating cylinder 14 is connected to the filling instrument body.

[0158] In this way, the insulating tube 5 can block the gutta-percha heating tube 14 and the filling instrument body in the gutta-percha sealing structure, preventing the gutta-percha heating tube 14 from transferring heat to the filling instrument body, thereby preventing the filling instrument body from being damaged by heat, thereby improving the working stability and service life of the gutta-percha filling instrument, and also preventing the user from being scalded when holding the filling instrument body, thereby improving the safety of using the gutta-percha filling instrument.

[0159] The obturator body in the disclosed embodiments may include any reasonable components.

[0160] In one possible implementation, see Figure 6 The filling instrument body may include a slide 7 and a driving assembly, and an end surface of one end of the slide 7 has a second clamping groove 71 ( Figure 7 Another perspective is given), the drive assembly is at least partially located in the slide cylinder 7, the drive assembly is connected to the slide cylinder 7, and is transmission-connected to the push rod 3.

[0161] The positional connection relationship between the gutta-percha sealing structure and the slide tube 7 can be seen in Figure 8 and Fig. 9 ( Fig. 9 yes Figure 8 The end surface of the heat-insulating cylinder 5 away from the gutta-percha heating cylinder 14 has a second clamping block 52 (see Figure 7 ), the second clamping block 52 is located in the second clamping groove 71 (see Figure 7 )middle.

[0162] When the gutta-percha filling instrument is working, the driving assembly drives the push rod 3 to move axially, so that the push rod 3 pushes out the melted gutta-percha in the third channel 13, or drives the push rod 3 to retract after the push rod 3 pushes out all the gutta-percha.

[0163] The clamping connection between the second clamping block 52 and the second clamping groove 71 prevents the slide tube 7 and the heat-insulating tube 5 from rotating relative to each other, thereby improving the working stability of the gutta-percha filling instrument. In addition, the use of parts such as screws is reduced, the additional space required for screw connection is reduced, and the disassembly efficiency and positioning accuracy are improved.

[0164] Among them, the driving component can be any reasonable structure, for example, it can include a motor, and the driving component can convert the rotation of the motor into axial movement, thereby driving the push rod 3 to move axially, etc. The embodiment of the present disclosure does not limit the specific structure of the driving component.

[0165] The above structures are merely examples of several possible structures of the gutta-percha filling instrument provided in the embodiments of the present disclosure. The gutta-percha filling instrument may also include any other reasonable components or structures, and the embodiments of the present disclosure do not specifically limit this.

[0166] In summary, the disclosed embodiment provides a gutta-percha filling instrument, in which the inner wall of the sealing ring 4 is always in contact with the outer wall of the push rod 3 after the push rod 3 pushes out the gutta-percha in the gutta-percha bin 1 and then retracts, and the gutta-percha attached to the outer wall of the push rod 3 flows into the groove 41 as the push rod 3 and the inner wall of the sealing ring 4 move relative to each other. In this way, on the one hand, the gutta-percha flows into the groove 41, thereby reducing the gutta-percha leakage to other components, and on the other hand, the gutta-percha flowing into the groove 41 squeezes the inner wall of the groove 41, thereby tightening the sealing ring 4, thereby making the inner wall of the sealing ring 4 and the push rod 3, and the outer wall of the sealing ring 4 and the inner wall of the second channel 12 fit more closely, thereby improving the sealing effect between the inner wall of the sealing ring 4 and the push rod 3, and the outer wall of the sealing ring 4 and the inner wall of the second channel 12, and forming a virtuous circle in the two aspects, thereby improving the sealing effect, reducing the gutta-percha leakage, and further improving the working stability and service life of the gutta-percha filling instrument.

[0167] 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 spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A gutta-percha sealing structure, characterized in that: The gutta-percha sealing structure comprises a gutta-percha chamber (1), a push rod (3) and a sealing ring (4); The gutta-percha cartridge (1) comprises a first channel (11), a second channel (12) and a third channel (13) which are connected in sequence, and the diameter of the second channel (12) is larger than the diameter of the first channel (11) and the diameter of the third channel (13); The push rod (3) passes through the first channel (11) and the second channel (12) and is slidably connected to the third channel (13), and an annular accommodation space is formed between the outer wall of the push rod (3) and the inner wall of the second channel (12); The sealing ring (4) is located in the annular accommodating space, the inner wall of the sealing ring (4) is in contact with the outer wall of the push rod (3), the outer wall of the sealing ring (4) is in contact with the inner wall of the second channel (12), and the sealing ring (4) has a groove (41), the notch of the groove (41) faces the third channel (13).

2. The gutta-percha sealing structure according to claim 1, characterized in that: The sealing ring (4) comprises an inner ring (42) and an outer ring (43); one end of the inner ring (42) close to the bottom of the groove (41) is connected to one end of the outer ring (43) close to the bottom of the groove (41), so that the groove (41) is formed between the inner ring (42) and the outer ring (43); the groove (41) is an annular structure; the groove (41), the inner ring (42) and the outer ring (43) are coaxially arranged; the inner ring (42) is in contact with the outer wall of the push rod (3); and the outer ring (43) is in contact with the inner wall of the second channel (12).

3. The gutta-percha sealing structure according to claim 2, characterized in that: The sealing ring (4) further comprises a spring (44) which is an annular structure. The spring (44) is located in the groove (41) and is coaxially arranged with the groove (41). Two elastic force action surfaces of the spring (44) are respectively in contact with the inner ring (42) and the outer ring (43).

4. The gutta-percha sealing structure according to claim 3, characterized in that: The cross section of the spring (44) is U-shaped or V-shaped.

5. The gutta-percha sealing structure according to claim 4, characterized in that: The two elastic force action surfaces of the spring (44) are respectively in contact with a position of the notch of the inner ring (42) close to the groove (41) and a position of the notch of the outer ring (43) close to the groove (41).

6. The gutta-percha sealing structure according to claim 1, characterized in that: The gutta-percha chamber (1) comprises a gutta-percha heating tube (14) and a connecting seat (15), wherein the gutta-percha heating tube (14) has the second channel (12) and the third channel (13), and the connecting seat (15) has the first channel (11), and the connecting seat (15) cooperates with an end of the gutta-percha heating tube (14) close to the second channel (12).

7. The gutta-percha sealing structure according to claim 1, characterized in that: The gutta-percha chamber (1) comprises a gutta-percha heating tube (14) and a connecting seat (15), wherein the gutta-percha heating tube (14) has the third channel (13), and the connecting seat (15) has the first channel (11) and the second channel (12), and an end of the connecting seat (15) close to the second channel (12) cooperates with the gutta-percha heating tube (14).

8. The gutta-percha sealing structure according to claim 6 or claim 7, characterized in that: The gutta-percha sealing structure also includes a heat-insulating cylinder (5); The heat-insulating tube (5) is sleeved on at least part of the outer side of the gutta-percha heating tube (14) and the outer side of the connecting seat (15), and one end of the heat-insulating tube (5) is connected to the gutta-percha heating tube (14).

9. The gutta-percha sealing structure according to claim 8, characterized in that: The outer wall of the gutta-percha heating cylinder (14) has a first annular protrusion (141); The connecting seat (15) comprises a tube column (151) and a cover plate (152), the inner wall of the tube column (151) matches the outer wall of the gutta-percha heating tube (14), the cover plate (152) is connected to an end of the tube column (151) away from the gutta-percha heating tube (14), and the cover plate (152) has the first channel (11); The inner wall of the heat-insulating cylinder (5) is provided with a second annular protrusion (51), and the second annular protrusion (51) is clamped between the first annular protrusion (141) and the pipe column (151).

10. The gutta-percha sealing structure according to claim 9, characterized in that: The first annular protrusion (141) is provided with a first clamping groove (142); The second annular protrusion (51) has a first clamping block (511), and the first clamping block (511) is located in the first clamping groove (142).

11. The gutta-percha sealing structure according to claim 9, characterized in that: The inner wall of the tube column (151) is threadedly connected to the outer wall of the gutta-percha heating cylinder (14).

12. The gutta-percha sealing structure according to claim 9, characterized in that: A temperature sampling groove (143) is provided on the outer wall of the gutta-percha heating cylinder (14) at a position corresponding to the second annular protrusion (51); The gutta-percha sealing structure further comprises a temperature sensor (6), wherein the temperature sensor (6) comprises a detection probe (61), wherein the detection probe (61) is located in the temperature sampling tank (143) and is in contact with the gutta-percha heating cylinder (14).

13. A gutta-percha filling instrument, characterized in that: The gutta-percha filling instrument comprises a filling instrument body and a gutta-percha sealing structure as claimed in any one of claims 1 to 12; The gutta-percha sealing structure is connected to the filling instrument body.

14. The gutta-percha filling instrument according to claim 13, characterized in that: The filling instrument body comprises a slide cylinder (7) and a driving assembly, the end surface of one end of the slide cylinder (7) having a second clamping groove (71), the driving assembly being at least partially located in the slide cylinder (7), the driving assembly being connected to the slide cylinder (7) and being transmission-connected to the push rod (3); When the gutta-percha filling instrument includes an insulating tube (5), the end surface of the insulating tube (5) away from the gutta-percha heating tube (14) has a second clamping block (52), and the second clamping block (52) is located in the second clamping groove (71).

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