阅读说明：本技术 热熔牙胶填充装置 (Hot melt gutta-percha filling device ) 是由 罗烽 邓武雄 于 2019-11-19 设计创作，主要内容包括：本发明提供一种热熔牙胶填充装置,热熔牙胶填充装置包括充填针、壳体和安装于壳体内的加热管；充填针包括针筒和安装于针筒的针头,针筒上设置有入胶孔,入胶孔与针头内部连通,针筒远离针头的一端套装有加热管,针筒包括靠近加热管一端的第一圆锥筒,加热管包括靠近针筒一端的第二圆锥筒,第二圆锥筒上形成有与入胶孔连通的通孔,第一圆锥筒的锥度与第二圆锥筒锥度相同,第一圆锥筒的内壁面紧贴于第二圆锥筒的外壁面。从加热管中融化后的牙胶依次经过通孔和针筒的入胶孔进入针头内,通过针筒与加热管采用锥度密封的方式,有效的避免牙胶泄漏。该热熔牙胶填充装置具有能够避免牙胶泄漏的优点。(The invention provides a hot-melt gutta-percha filling device, which comprises a filling needle, a shell and a heating pipe arranged in the shell, wherein the filling needle is arranged in the shell; fill the needle and include the cylinder and install in the syringe needle of cylinder, be provided with into the glue hole on the cylinder, go into glue hole and the inside intercommunication of syringe needle, the one end cover that the syringe needle was kept away from to the cylinder is equipped with the heating pipe, the cylinder includes the first circular cone section of thick bamboo that is close to heating pipe one end, the heating pipe includes the second circular cone section of thick bamboo that is close to cylinder one end, be formed with on the second circular cone section of thick bamboo with go into the through-hole of glue hole intercommunication, the tapering of first circular cone section of thick bamboo is the same with the tapering of second circular cone section of thick bamboo, the. The gutta-percha after melting from the heating pipe enters the needle head through the through hole and the glue inlet hole of the needle cylinder in sequence, and the needle cylinder and the heating pipe adopt a taper sealing mode, so that the gutta-percha is effectively prevented from leaking. This hot melt gutta-percha filling device has the advantage that can avoid the gutta-percha to leak.)

1. A hot melt gutta percha filling device, comprising:

a housing;

a heating tube mounted within the housing;

the filling needle comprises a needle cylinder and a needle head arranged on the needle cylinder, a glue inlet hole is formed in the needle cylinder and communicated with the inside of the needle head, the heating pipe is sleeved at one end, far away from the needle head, of the needle cylinder, the needle cylinder comprises a first conical cylinder close to one end of the heating pipe, the heating pipe comprises a second conical cylinder close to one end of the needle cylinder, a through hole communicated with the glue inlet hole is formed in the second conical cylinder, the taper of the first conical cylinder is identical to that of the second conical cylinder, and the inner wall surface of the first conical cylinder is tightly attached to the outer wall surface of the second conical cylinder.

2. The hot melt gutta-percha filling device as in claim 1, further comprising a head cover installed at an end of said housing, said head cover extending out of said housing, said head cover having a diameter decreasing from said housing to an end away from said housing, said head cover being installed with a needle seat nut, said needle seat nut being installed at an outer side of said needle cylinder, said heating pipe being further provided with an external thread, an inner wall of said needle seat nut being provided with an internal thread engaged with said external thread.

3. The hot melt gutta percha filling device as in claim 2, wherein said needle mount nut comprises a housing and a connection section installed in said housing, said connection section comprising a body and a protruding end and said internal thread respectively connected to both ends of said body, said body being attached to said first conical cylinder.

4. The hot melt gutta percha filling apparatus as in claim 3, wherein said outer wall surface of said outer shell is provided with symmetrical flat positions.

5. The hot-melt gutta-percha filling device according to claim 2, wherein a limiting ring is further disposed on the heating pipe, and the second conical cylinder, the external thread and the limiting ring are sequentially distributed along the length direction of the heating pipe.

6. The hot-melt gutta-percha filling device as in claim 2, wherein said head cover comprises an inner layer and an outer layer, said needle seat nut is installed on said inner layer, said inner layer is a heat insulation plastic layer, said outer layer is a silica gel layer.

7. The hot melt gutta percha filling device as in claim 2, wherein said head cover and said needle mount nut are integrally formed.

8. The hot melt gutta-percha filling device as in any one of claims 1 to 7, further comprising a fixing member installed in said housing, said fixing member being provided with an insertion hole, said heating pipe being provided with an extended end, said extended end being engaged with said insertion hole.

9. The hot-melt gutta-percha filling device as in any one of claims 1 to 7, further comprising a push rod disposed in said heating pipe, wherein a piston is installed at a top end of said push rod, and an outer wall surface of said piston is closely attached to an inner wall surface of said heating pipe.

10. The hot melt gutta percha filling apparatus as in any one of claims 1 to 7, wherein said casing comprises a handle and a handle, said handle having a first groove and a second groove formed thereon, said handle having a third groove formed thereon.

Technical Field

The invention relates to the field of gutta-percha filling, in particular to a hot-melt gutta-percha filling device.

Background

The hot melt gutta-percha filling instrument is a common device for filling hot melt gutta-percha in the dental root canal treatment process, and comprises a filling gun and a filling pen, wherein the filling pen is used for heating, cutting and pressurizing the gutta-percha point at the root tip, and the filling gun is used for melting the gutta-percha and injecting the gutta-percha into a root canal to be filled. The common structure of the gutta-percha injection part of traditional hot melt gutta-percha filling gun is like patent "a leak-proof gutta-percha filling gun (CN 201621469210)", the gutta-percha injection part is composed of a filling needle component, a heating tube component, a push rod component and a piston, the filling needle component and the heating tube component are detachably connected by screw threads, after each gutta-percha filling, the filling needle component and the heating tube component are disassembled, the piston is taken out, then the push rod is withdrawn by pulling back, thereby avoiding scraping a little gutta-percha remained on the inner wall of the heating tube in the process of piston withdrawal, and the gutta-percha falls inside the.

For the mode of connecting the filling needle and the metal heating pipe by the threads, after the gutta-percha is melted in the metal heating pipe, the rear end pushing rod applies pressure to extrude the melted gutta-percha out of the needle head of the filling needle. Because the thrust is big in propulsion process, produce very big pressure in metal heating pipe and filling needle, can lead to a little the gutta-percha that melts to leak from threaded connection department, remain simultaneously and can cause filling needle and metal heating pipe adhesion after the gutta-percha cooling solidification in the screw gap, increased the separation degree of difficulty of filling needle and metal heating pipe to the filling needle that unloads, when going on the machine once more, if the gutta-percha on the screw is too much, can cause the problem of not screwing up.

In view of the above, there is a need for a new hot-melt gutta-percha filling device that solves or at least alleviates the above-mentioned technical drawbacks.

Disclosure of Invention

The invention mainly aims to provide a hot-melt gutta-percha filling device, and aims to solve the technical problem that gutta-percha of a hot-melt gutta-percha filling gun in the prior art is easy to leak.

In order to achieve the above object, the present invention provides a hot-melt gutta-percha filling apparatus, comprising:

a housing;

a heating tube mounted within the housing;

the filling needle comprises a needle cylinder and a needle head arranged on the needle cylinder, a glue inlet hole is formed in the needle cylinder and communicated with the inside of the needle head, the heating pipe is sleeved at one end, far away from the needle head, of the needle cylinder, the needle cylinder comprises a first conical cylinder close to one end of the heating pipe, the heating pipe comprises a second conical cylinder close to one end of the needle cylinder, a through hole communicated with the glue inlet hole is formed in the second conical cylinder, the taper of the first conical cylinder is identical to that of the second conical cylinder, and the inner wall surface of the first conical cylinder is tightly attached to the outer wall surface of the second conical cylinder.

Preferably, hot melt gutta percha filling device is still including installing the headgear of casing tip, the headgear stretches out outside the casing, the diameter of headgear certainly the casing is to keeping away from the one end reduction of casing, install the needle file nut on the headgear, needle file nut suit is in the outside of cylinder, still be provided with the external screw thread on the heating pipe, the inner wall of needle file nut be equipped with thread fit's internal thread.

Preferably, the needle seat nut comprises a shell and a connecting section arranged in the shell, the connecting section comprises a body, and a protruding end and an internal thread which are respectively connected to two ends of the body, and the body is attached to the first conical cylinder.

Preferably, the outer wall surface of the shell is provided with symmetrical flat positions.

Preferably, the heating pipe is further provided with a limiting ring, and the second conical cylinder, the external thread and the limiting ring are sequentially distributed along the length direction of the heating pipe.

Preferably, the headgear includes inlayer and skin, the needle file nut install in the inlayer, the inlayer is thermal-insulated plastic layer, the skin is the silica gel layer.

Preferably, the ferrule and the hub nut are integrally formed.

Preferably, the hot melt gutta-percha filling device further comprises a fixing piece arranged in the shell, wherein the fixing piece is provided with a jack, the heating pipe is provided with an extending end, and the extending end is matched with the jack.

Preferably, the hot melt gutta-percha filling device further comprises a push rod arranged in the heating pipe, a piston is installed at the top end of the push rod, and the outer wall surface of the piston is tightly attached to the inner wall surface of the heating pipe.

Preferably, the housing includes a grip formed with a first recess and a second recess, and a handle formed with a third recess.

In the technical scheme of the invention, the hot-melt gutta-percha filling device comprises a filling needle, a shell and a heating pipe arranged in the shell; fill the needle and include the cylinder and install in the syringe needle of cylinder, be provided with into the glue hole on the cylinder, go into glue hole and the inside intercommunication of syringe needle, the one end cover that the syringe needle was kept away from to the cylinder is equipped with the heating pipe, the cylinder includes the first circular cone section of thick bamboo that is close to heating pipe one end, the heating pipe includes the second circular cone section of thick bamboo that is close to cylinder one end, be formed with on the second circular cone section of thick bamboo with go into the through-hole of glue hole intercommunication, the tapering of first circular cone section of thick bamboo is the same with the tapering of second circular cone section of thick bamboo, the internal. The gutta-percha after melting from the heating pipe enters the needle head through the through hole and the glue inlet hole of the needle cylinder in sequence, and the needle cylinder and the heating pipe adopt a taper sealing mode, so that the gutta-percha is effectively prevented from leaking. The invention has the advantage of avoiding gum leakage.

Drawings

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

FIG. 1 is a schematic perspective view of a hot-melt gutta-percha filling device according to an embodiment of the present invention;

FIG. 2 is a front view of a hot melt gutta percha filling apparatus as an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a hot melt gutta-percha filling apparatus in accordance with an embodiment of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a schematic perspective view of a filling needle according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a hub nut according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a hub nut in accordance with an embodiment of the present invention;

fig. 8 is a schematic view of a partial structure of a heating pipe and a head cover according to an embodiment of the invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that all the directional indicators (such as the upper and lower … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, 5 and 8, the present invention provides a hot-melt gutta-percha filling apparatus, comprising:

a housing 1;

a heating pipe 2 installed in the housing 1;

fill needle 3, fill needle 3 includes syringe 31 and installs in syringe 31's syringe needle 32, be provided with into the glue hole on the syringe 31, go into glue hole and the inside intercommunication of syringe needle 32, syringe 31 keeps away from the one end cover of syringe needle 32 and is equipped with heating pipe 2, syringe 31 is including being close to the first circular cone section of thick bamboo 312 of heating pipe 2 one end, heating pipe 2 is including being close to the second circular cone section of thick bamboo 21 of syringe 31 one end, be formed with on the second circular cone section of thick bamboo 21 with the through-hole 22 of going into the glue hole intercommunication, the tapering of first circular cone section of thick bamboo 312 is the same with the tapering of second circular cone section of thick bamboo 21, the internal wall of first circular cone section of.

In the above embodiment, the gutta-percha melted from the heating pipe 2 sequentially passes through the through hole 22 and the glue inlet hole of the needle cylinder 31 to enter the needle head 32 (the needle head is a vacuum needle head), and the needle cylinder 31 and the heating pipe 2 adopt a taper sealing manner, that is, the inner wall surface of the first conical cylinder 312 is in sealing fit with the outer wall surface of the second conical cylinder 21. The mode of filling needle 3 and 2 threaded connection of heating pipe among the prior art has been replaced, can prevent effectively that the gutta-percha from leaking from threaded connection, and among the prior art, the gutta-percha cooling solidification back in the thread gap can cause to fill needle 3 and 2 adhesions of metal heating pipe simultaneously, has increased the separation degree of difficulty of filling needle 3 and metal heating pipe 2. This embodiment can effectually avoid gutta-percha to the separation degree of difficulty that reduces filling needle 3 and tubular metal resonator.

Referring to fig. 4-7, as a preferred embodiment of the above embodiment, the hot melt gutta-percha filling device further includes a head cover 4 installed at an end of the housing 1, the head cover 4 extends out of the housing 1, the diameter of the head cover 4 is reduced from the housing 1 to an end far away from the housing 1, a needle base nut 6 is installed on the head cover 4, the needle base nut 6 is sleeved on an outer side of the needle cylinder 31, an external thread 23 is further provided on the heating pipe 2, and an internal thread 63 matched with the external thread and the external thread 23 is provided on an inner wall of the needle base nut. Through threaded connection, conveniently fill the separation of needle 3 and heating pipe 2, the diameter of headgear 4 reduces from casing 1 to the one end of keeping away from casing 1, and the headgear can not block the rubber injection needle when doing the indent operation, and the field of vision is wide. As a specific implementation mode of the embodiment, the needle seat nut 6 comprises a shell 64 and a connecting section 60 arranged in the shell 64, the connecting section 60 comprises a body 61, a protruding end 62 and an internal thread 63 which are respectively connected to two ends of the body 61, the internal thread 63 is connected with the external thread 23, the needle cylinder 31 further comprises a step 313 connected with the first conical cylinder 312, the protruding end 62 abuts against the step 313, and the body 61 abuts against the first conical cylinder 312. After the internal thread 63 of the needle seat nut 6 is matched and screwed with the external thread 23 of the heating tube 2, the body 61 of the needle seat nut 6 is pressed with the outer wall surface of the first conical cylinder 312 of the needle cylinder 31, and the outer wall surface of the first conical cylinder 312 is compressed inwards, so that the first conical cylinder 312 is tightly attached to the second conical cylinder 21, the sealing performance of the first conical cylinder 312 and the second conical cylinder 21 is improved, and gum leakage is prevented. The heating tube 2 can here be a metallic heating tube, preferably stainless steel.

Further, referring to fig. 6, the outer wall surface of the housing 64 is provided with symmetric flat portions 641, and the flat portions 641 are used for matching with a wrench. The flat 641 provides an effective acting point for the wrench, so that the needle seat nut 6 and the filling needle 3 can be conveniently detached.

It should be noted that, there is also a scheme for preventing gutta-percha leakage in the prior art, for example, in the patent "gutta-percha heating and filling device of hot-melt gutta-percha filling gun (CN 201820027395)", the gutta-percha injection part consists of a needle head, a filling needle assembly, a gutta-percha needle, a needle base nut, a needle tube, a metal heating cavity, a heating tube assembly, a gutta-percha mouth, gutta-percha, a push rod, a piston, and a piston screw rod, the gutta-percha needle, the needle head and the filling needle assembly are integrated, the gutta-percha needle is fixed by the needle base nut after being inserted into the metal heating cavity, and the gutta-percha is directly pushed. The technical scheme enables the gutta-percha to be directly melted in the gutta-percha needle, and avoids the gutta-percha leakage at the threaded connection part of the needle head and the heating tube component. The tooth glue needle can be directly arranged in the metal heating cavity, and tooth glue is pressurized and pushed out by a piston push rod at the rear end after being heated and melted in the tooth glue needle. The proposal avoids the gum leakage at the threaded connection part of the filling needle and the metal heating pipe, but the method requires that the aluminum alloy gum needle is processed into a thin-wall long cylinder shape, and has large processing difficulty and high cost; and the heating device heats and melts the gutta-percha after passing through the metal heating pipe and the gutta-percha needle, thereby influencing heat conduction to a certain extent. And the technical scheme adopted by the patent is completely different from that of the application.

In addition, referring to fig. 7, the heating pipe 2 is further provided with a limiting ring 7, and the second conical cylinder 21, the external thread 23 and the limiting ring 7 are sequentially distributed along the length direction of the heating pipe 2. The limiting ring 7 is arranged to prevent the needle seat nut 6 from being installed beyond a preset position and damaging parts.

In addition, headgear 4 includes inlayer and skin, and needle file nut 6 is installed in the inlayer, and the inlayer is thermal-insulated plastic layer, and the skin is the silica gel layer. The inlayer mainly plays thermal-insulated effect, scalds when preventing the people from operating, and the outer adoption silica gel layer is more wear-resisting and not fragile. Of course, the head cover 4 and the needle seat nut 6 can also adopt an integrally formed structure, and the integrally formed structure is simple to manufacture and low in cost.

Further, referring to fig. 3, the hot-melt gutta-percha filling device further comprises a heat insulation sleeve 8 sleeved outside the heating pipe 2, wherein the heat insulation sleeve 8 is arranged between the head cover 4 and the heating pipe 2, and the heating pipe 2 and the outside adopt a 3-layer heat insulation mode in addition to the inner layer and the outer layer of the head cover 4.

Further, referring to fig. 3 again, the hot-melt gutta-percha filling device further comprises a fixing member 9 installed in the housing 1, the fixing member 9 is provided with a plurality of insertion holes, the heating pipe 2 is provided with an extending end 24, the extending end 24 is matched with the insertion holes, and the number of the extending end 24 and the insertion holes can be multiple. The fixing piece 9 is used for fixing the heating pipe 2 and preventing the heating pipe 2 from loosening or shaking. Certainly, the fixing member 9 is further provided with a gutta-percha port communicated with the heating pipe 2, and the gutta-percha is injected into the heating pipe 2 from the gutta-percha port.

In addition, referring to fig. 3, the hot melt gutta-percha filling device further comprises a push rod 10 arranged in the heating pipe 2, a piston 5 is installed at the top end of the push rod 10, the piston 5 is in sealing fit with the inner wall surface of the heating pipe 2, the push rod 10 pushes the piston 5 to extrude the melted gutta-percha into the needle head 32, and the piston 5 plays a sealing role in the pushing process.

Of course, referring to fig. 1 and 2, the housing includes a handle 11 and a handle 12, a first groove 111 and a second groove 112 are formed on the handle 11, a third groove 121 is formed on the handle 12, the first groove 111 is formed on the handle 11 to increase the position of the tiger mouth of the human hand, the second groove 112 is formed to facilitate holding by the forefinger, and the third groove 121 is formed on the handle to facilitate pressing by the fingers. The three grooves are arranged, so that the hand can hold the hot-melt gutta-percha filling device more stably, and the human engineering is met.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical spirit of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.