CN111134874B - Glue injection needle and hot melt gutta-percha gun - Google Patents
Glue injection needle and hot melt gutta-percha gun Download PDFInfo
- Publication number
- CN111134874B CN111134874B CN202010102340.0A CN202010102340A CN111134874B CN 111134874 B CN111134874 B CN 111134874B CN 202010102340 A CN202010102340 A CN 202010102340A CN 111134874 B CN111134874 B CN 111134874B
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- Prior art keywords
- needle
- hole
- connecting nut
- hot
- glue
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- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 239000003292 glue Substances 0.000 title claims abstract description 35
- 239000012943 hotmelt Substances 0.000 title claims abstract description 11
- 239000000899 Gutta-Percha Substances 0.000 title claims description 11
- 240000000342 Palaquium gutta Species 0.000 title claims description 11
- 229920000588 gutta-percha Polymers 0.000 title claims description 11
- 239000004831 Hot glue Substances 0.000 claims abstract description 40
- 230000008878 coupling Effects 0.000 claims description 47
- 238000010168 coupling process Methods 0.000 claims description 47
- 238000005859 coupling reaction Methods 0.000 claims description 47
- 238000013016 damping Methods 0.000 claims description 24
- 229920001971 elastomer Polymers 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000004033 plastic Substances 0.000 description 10
- 238000004891 communication Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004262 dental pulp cavity Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/50—Implements for filling root canals; Methods or instruments for medication of tooth nerve channels
- A61C5/55—Implements for filling root canals; Methods or instruments for medication of tooth nerve channels with heating means, e.g. for heating gutta percha
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
本发明涉及医疗器械领域，具体而言，涉及一种注胶针和热熔牙胶枪。一种注胶针，注胶针包括热胶管体、连接螺母以及针头组件。连接螺母与热胶管体的远端连接，连接螺母配置有安装孔，安装孔沿热胶管体的远端到近端的方向贯穿连接螺母。针头组件配置有热胶通道，针头组件的至少部分可转动地设置于安装孔内，并且热胶通道与热胶管体的内腔连通。该注胶针能够提高针头旋转的可靠性，从而避免出现针头脱落的情况。
The present invention relates to the field of medical devices, and in particular, to a glue injection needle and a hot melt dental glue gun. A glue injection needle, comprising a hot glue tube body, a connecting nut and a needle assembly. The connecting nut is connected to the distal end of the hot glue tube body, and the connecting nut is provided with a mounting hole, which penetrates the connecting nut from the distal end to the proximal end of the hot glue tube body. The needle assembly is provided with a hot glue channel, and at least part of the needle assembly is rotatably arranged in the mounting hole, and the hot glue channel is connected to the inner cavity of the hot glue tube body. The glue injection needle can improve the reliability of needle rotation, thereby avoiding the situation where the needle falls off.
Description
Technical Field
The invention relates to the field of medical appliances, in particular to a glue injection needle and a hot-melt tooth glue gun.
Background
The traditional use mode of the hot-melt gutta-percha gun is that gutta-percha is put into a gutta-percha inlet, pushed into a metal heating cavity by a pushing rod, the gutta-percha is heated and melted and then is extruded to a glue injection needle assembly, and finally is sent into a root canal for filling from a small needle tube, and a needle head is required to be rotated in the treatment process.
However, in the prior art, a manner of rotating the needle relative to the needle sleeve is often adopted, and the rotation manner can lead to uneven rotation force of the needle, generate a mutation force, and further lead to low rotation reliability of the needle.
Disclosure of Invention
The invention aims to provide a glue injection needle and a hot-melt tooth glue gun, which can improve the reliability of needle rotation, thereby avoiding the situation that the needle falls off.
Embodiments of the present invention are implemented as follows:
In a first aspect, embodiments provide a glue injection needle comprising a hot glue tube, a coupling nut, and a needle assembly;
The connecting nut is connected with the distal end of the hot rubber tube body, the connecting nut is provided with a mounting hole, and the mounting hole penetrates through the connecting nut along the direction from the distal end to the proximal end of the hot rubber tube body;
The needle head assembly is provided with a hot glue channel, at least part of the needle head assembly is rotatably arranged in the mounting hole, and the hot glue channel is communicated with the inner cavity of the hot glue tube body.
In an alternative embodiment, along the direction from the distal end to the proximal end of the connection nut, the outer circumferential surface of the connection nut is sequentially provided with a protruding part and an external thread;
the external diameter of the protruding part is larger than that of the external thread, the external thread is in threaded connection with the inner cavity wall of the hot rubber pipe body, and one end, close to the external thread, of the protruding part abuts against the hot rubber pipe body.
In an alternative embodiment, the boss is an annular boss disposed about the distal end of the coupling nut in a proximal direction;
The glue injection needle also comprises a gasket, and the gasket is arranged between the convex part and the abutting surface of the hot glue pipe body.
In an alternative embodiment, the glue injection needle further comprises a damping ring, wherein the damping ring is positioned between the abutting surfaces of the connecting nut and the needle assembly and simultaneously abuts against the needle assembly and the connecting nut so as to provide damping for the rotation of the needle assembly relative to the mounting hole.
In an alternative embodiment, the proximal or distal end of the coupling nut is provided with an annular groove in communication with the mounting hole;
the annular groove and the needle assembly cooperate to define an annular space in which the dampening ring is mounted.
In an alternative embodiment, the needle assembly includes a needle hub and a needle body;
the needle sleeve extends into the mounting hole from the distal end of the connecting nut and is rotatably connected with the mounting hole;
The needle sleeve is provided with a first through hole and the needle body is provided with a second through hole along the direction from the far end to the near end of the connecting nut;
A part of the needle body is matched with the first through hole, the rest part of the needle body extends out of the first through hole from the distal end of the needle sleeve, and the movement of the needle body relative to the axial direction of the first through hole is limited;
The first through hole and the second through hole form a hot glue channel together.
In an alternative embodiment, the needle assembly further comprises a guide sleeve, the guide sleeve being provided with a third through hole along the distal to proximal direction of the coupling nut;
the part of the needle sleeve, which is positioned outside the distal end of the connecting nut, is provided with an annular boss, and the annular boss is abutted with the connecting nut;
One end of the guide sleeve extends into the first through hole from the proximal end of the needle sleeve and is in interference fit with the inner wall of the first through hole, one end of the guide sleeve extending into the first through hole is abutted against the end part of the needle body, and the other end of the guide sleeve is positioned outside the first through hole and is abutted against the proximal end of the connecting nut;
the second through hole and the third through hole form a hot glue channel together.
In an alternative embodiment, the distal end of the coupling nut is provided with an annular groove in communication with the mounting hole;
an annular boss is disposed about the distal end of the coupling nut in a proximal direction, the annular boss and the annular groove together defining an annular space in which the damping ring is mounted.
In an alternative embodiment, the first through hole comprises a first hole part and a second hole part which are sequentially arranged along the direction from the proximal end to the distal end of the connecting nut;
The inner diameter of the first hole part is larger than that of the second hole part, and a transition inclined plane is arranged at the joint of the first hole part and the second hole part;
the part of the needle body positioned in the first through hole is matched with the second hole part and the transition inclined plane at the same time;
The guide sleeve is positioned at one end of the first through hole, extends into the first hole part and is in interference fit with the inner wall of the first hole part, and one end of the guide sleeve extending into the first hole part is abutted against the needle body so as to limit the movement of the needle body along the proximal end of the connecting nut to the distal end direction.
In a second aspect, an embodiment provides a hot-melt gutta-percha gun, the hot-melt gutta-percha gun including a push rod and the above-mentioned injecting needle;
The part of the push rod extends into the inner cavity of the hot rubber tube body from the proximal end of the hot rubber tube body and is movably connected with the inner cavity of the hot rubber tube body.
The beneficial effects of the embodiment of the invention include:
The glue injection needle comprises a hot glue tube, a connecting nut and a needle head assembly. Wherein, at least part of the needle head assembly is rotatably arranged in the mounting hole, and the needle head assembly is provided with a hot glue channel communicated with the inner cavity of the hot glue pipe body. From this, through the rotatable coupling of syringe needle subassembly and coupling nut to when rotating the syringe needle subassembly, alright be connected through the rotation of syringe needle subassembly and coupling nut, improve the degree of consistency of rotation power, in order to avoid appearing the uneven condition that produces the abrupt force of atress, and then can effectively improve the rotation reliability of this injecting glue needle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a structure of a glue injection needle according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an injection needle in an embodiment of the invention;
FIG. 3 is a schematic view of a coupling nut according to an embodiment of the present invention;
FIG. 4 is a schematic view of a needle assembly according to an embodiment of the present invention;
FIG. 5 is an exploded view of a needle assembly according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a needle assembly according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a needle assembly according to an embodiment of the present invention;
fig. 8 is a schematic view of a needle sheath according to an embodiment of the present invention.
The icons are 100-glue injection needle, 110-hot glue tube, 120-connecting nut, 130-needle head assembly, 121-mounting hole, 131-hot glue channel, 111-inner cavity, 122-boss, 123-external thread, 140-gasket, 150-damping ring, 124-annular groove, 125-annular space, 132-needle sleeve, 133-needle body, 1321-first through hole, 1331-second through hole, 134-guide sleeve, 1341-third through hole, 1322-annular boss, 1323-first hole, 1324-second hole, 1325-transitional slope.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 and 2, fig. 1 and 2 show a structure of a glue injection needle according to an embodiment of the invention. The embodiment provides a glue injection needle 100, wherein the glue injection needle 100 comprises a hot glue tube 110, a connecting nut 120 and a needle head assembly 130.
Wherein, the connection nut 120 is connected with the distal end of the thermal plastic tube body 110, the connection nut 120 is provided with a mounting hole 121, and the mounting hole 121 penetrates the connection nut 120 along the direction from the distal end to the proximal end of the thermal plastic tube body 110.
The needle assembly 130 is provided with a hot glue channel 131, at least part of the needle assembly 130 is rotatably arranged in the mounting hole 121, and the hot glue channel 131 is communicated with the inner cavity 111 of the hot glue tube 110.
The working principle of the glue injection needle 100 is as follows:
The injection needle 100 includes a hot hose 110, a coupling nut 120, and a needle assembly 130. Wherein at least a portion of the needle assembly 130 is rotatably disposed within the mounting bore 121 and the needle assembly 130 is provided with a thermal gel passage 131 in communication with the interior cavity 111 of the thermal gel tube body 110. Therefore, the needle head assembly 130 is rotatably connected with the connecting nut 120, so that when the needle head assembly 130 is rotated, the rotating force uniformity can be improved through the rotating connection of the needle head assembly 130 and the connecting nut 120, the situation that the abrupt force is generated due to uneven stress can be avoided, and the rotating reliability of the glue injection needle 100 can be effectively improved.
Referring to fig. 1-3, fig. 3 shows a structure of a coupling nut according to an embodiment of the invention. In this embodiment, when the coupling nut 120 is provided, in order to facilitate the connection between the coupling screw and the thermal plastic tube 110, the outer circumferential surface of the coupling nut 120 is sequentially provided with a protrusion 122 and an external screw 123 along the distal end to the proximal end of the coupling nut 120, wherein the outer diameter of the protrusion 122 is larger than the outer diameter of the external screw 123. Thus, a portion of the coupling nut 120 extends into the inner cavity 111 of the hot-plastic tube 110, and is in threaded connection with the inner cavity 111 of the hot-plastic tube 110 through the external thread 123 on the coupling nut 120, and one end of the protrusion 122, which is close to the external thread 123, abuts against the hot-plastic tube 110, so that the mounting position of the coupling nut 120 and the hot-plastic tube 110 can be defined, so that the needle assembly 130 can be mounted, and the hot-plastic passage 131 is communicated with the hot-plastic tube 110.
Referring to fig. 4-7, fig. 4-7 illustrate the structure of a needle assembly according to an embodiment of the present invention. The protrusion 122, when provided, serves to locate and mount the coupling nut 120, so that when the protrusion 122 is provided, it may be an annular protrusion disposed in a distal to proximal direction about the coupling nut 120, and the injection needle 100 further includes a washer 140, the washer 140 being disposed between the protrusion 122 and the abutment surface of the thermal plastic tube body 110.
Further, referring to fig. 4-7, in the present embodiment, the injection needle 100 further includes a damping ring 150, wherein the damping ring 150 is located between the abutting surfaces of the coupling nut 120 and the needle assembly 130 and abuts against the needle assembly 130 and the coupling nut 120 to provide damping for the rotation of the needle assembly 130 relative to the mounting hole 121.
Therefore, the damping ring 150 can limit the rotation of the needle assembly 130, so that when the needle assembly 130 is rotated, the needle assembly 130 needs to be driven under the action of external force to overcome the friction force of the damping ring 150 between the contact surface of the coupling nut 120 and the needle assembly 130, so as to avoid unnecessary rotation of the needle assembly 130, and assist in maintaining the relative position between the needle assembly 130 and the coupling nut 120, thereby improving the reliability of the injection needle 100.
Further, referring to fig. 3-7, in order to facilitate installation of the damping ring 150, an annular groove 124 for installing the damping ring 150 is provided on the coupling nut 120, and the annular groove 124 has a shape corresponding to the damping ring 150, so that the damping ring 150 can be simultaneously abutted against the coupling nut 120 and the needle assembly 130 when the coupling nut 120 is assembled with the needle assembly 130, thereby increasing friction force. In addition, when annular groove 124 is provided, annular groove 124 may be provided at the proximal or distal end of coupling nut 120. And when the annular groove 124 is arranged, since the needle assembly 130 is matched with the mounting hole 121, in order to enable the needle assembly 130 matched with the mounting hole 121 to be abutted against the damping ring 150, when the annular groove 124 is arranged, the annular groove 124 is communicated with the mounting hole 121, so that the annular groove 124 and the end part of the mounting hole 121 form a stepped hole, when the damping ring 150 and the needle assembly 130 are matched with the mounting hole 121, the annular groove 124 and the needle assembly 130 jointly define an annular space 125 for mounting the damping ring 150, and the damping ring 150 mounted in the annular space 125 can be abutted against the connecting nut 120 and the needle assembly 130 at the same time, so that rotation damping is formed.
In this embodiment, referring to fig. 4-7, the needle assembly 130 includes a needle hub 132 and a needle body 133. The needle sleeve 132 extends into the mounting hole 121 from the distal end of the connecting nut 120 and is rotatably connected with the mounting hole 121, the needle sleeve 132 is provided with a first through hole 1321 along the direction from the distal end to the proximal end of the connecting nut 120, the needle body 133 is provided with a second through hole 1331, and the axes of the first through hole 1321 and the second through hole 1331 are coincident. And a portion of the needle body 133 is matched with the first through hole 1321, the rest portion of the needle body 133 extends out of the first through hole 1321 from the distal end of the needle sleeve 132, and the needle body 133 positioned in the first through hole 1321 is abutted against the first through hole 1321, so that the movement of the needle body 133 relative to the axial direction of the first through hole 1321 is limited, and the first through hole 1321 and the second through hole 1331 together form a hot glue channel 131 for outputting hot glue.
Further, referring to fig. 1-8, fig. 8 shows a structure of a needle sheath according to an embodiment of the present invention. In this embodiment, the needle assembly 130 further includes a guide sleeve 134, and the guide sleeve 134 is configured with a third through hole 1341 along a distal-to-proximal direction of the coupling nut 120, and a hole axis of the third through hole 1341 coincides with a hole axis of the second through hole 1331. In addition, the portion of the needle sheath 132 located outside the distal end of the coupling nut 120 is provided with an annular boss 1322, and the annular boss 1322 abuts against the coupling nut 120, so that the movement of the needle sheath 132 from the distal end of the coupling nut 120 in the proximal direction of the coupling nut 120 is restricted by the abutting action of the annular boss 1322 and the coupling nut 120.
Next, one end of the guide sleeve 134 extends into the first through hole 1321 from the proximal end of the needle sleeve 132 and is in interference fit with the inner wall of the first through hole 1321, and the end of the guide sleeve 134 extending into the first through hole 1321 abuts against the end of the needle body 133, and the other end of the guide sleeve 134 is located outside the first through hole 1321 and abuts against the proximal end of the connection nut 120.
Thus, when the needle body 133 is mated with the needle sheath 132, the needle sheath 132 is fixedly coupled with respect to the coupling nut 120 by the needle body 133 being fixed with respect to the needle sheath 132 while the movement of the needle sheath 132 from the distal end of the coupling nut 120 in the proximal direction of the coupling nut 120 is restricted by the annular boss 1322 and the movement of the needle sheath 132 from the proximal end of the coupling nut 120 in the distal direction of the coupling nut 120 is restricted by the guide sleeve 134, so that the needle sheath 132 is fixedly coupled with respect to the coupling nut 120, thereby maintaining the mounting position of the needle assembly 130 with respect to the coupling nut 120.
When the guide sleeve 134 is provided, the part of the guide sleeve 134 extending into the first through hole 1321 abuts against the needle body 133, so that the needle body 133 abuts against the needle sleeve 132, and the hot glue channel 131 is formed by the second through hole 1331 and the third through hole 1341. In other embodiments of the present invention, if the conductive path extending into the first through hole 1321 is not tightly abutted against the needle body 133, and the needle body 133 is tightly abutted against the first through hole 1321 of the needle sleeve 132 in other ways, and the portion of the guide sleeve 134 located in the first through hole 1321 is spaced apart from the needle body 133, the hot glue channel 131 is formed by the first through hole 1321, the second through hole 1331 and the third through hole 1341.
Further, in the present embodiment, referring to fig. 3-8, for installing the damping ring 150, the distal end of the coupling nut 120 is provided with an annular groove 124 communicating with the installation hole 121, and an annular boss 1322 is disposed in a distal-to-proximal direction around the coupling nut 120, and the annular boss 1322 and the annular groove 124 together define an annular space 125 for installing the damping ring 150. And the annular space 125 is sized to accommodate the dampening ring 150 such that dampening can simultaneously contact the coupling nut 120 and the needle hub 132 to create frictional dampening when the dampening ring 150 is assembled within the annular space 125.
In this embodiment, referring to fig. 4-8, when the first through hole 1321 is configured, the first through hole 1321 includes a first hole portion 1323 and a second hole portion 1324 sequentially disposed along a direction from a proximal end to a distal end of the connection nut 120, wherein an inner diameter of the first hole portion 1323 is larger than an inner diameter of the second hole portion 1324, and a transition slope 1325 is disposed at a connection portion between the first hole portion 1323 and the second hole portion 1324. The portion of the needle body 133 located in the first through hole 1321 is simultaneously matched with the second hole portion 1324 and the transition inclined plane 1325, so as to improve the tightness of the hot glue channel 131, and avoid the situation of glue leakage.
Next, the guide sleeve 134 is located at one end of the first through hole 1321 and extends into the first hole 1323 to be in interference fit with the inner wall of the first hole 1323, and one end of the guide sleeve 134 extending into the first hole 1323 abuts against the needle 133, so as to limit the movement of the needle 133 in the distal direction along the proximal end of the coupling nut 120.
Based on the above-mentioned injection needle 100, the embodiment provides a hot-melt gutta-percha gun, which comprises a push rod and the above-mentioned injection needle 100, wherein a part of the push rod extends into the inner cavity 111 of the hot-glue tube 110 from the proximal end of the hot-glue tube 110 and is movably connected with the inner cavity 111 of the hot-glue tube 110.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a injecting glue needle which characterized in that:
the glue injection needle comprises a hot glue tube body, a connecting nut and a needle head assembly;
the connecting nut is connected with the far end of the hot rubber pipe body, the connecting nut is provided with a mounting hole, and the mounting hole penetrates through the connecting nut along the direction from the far end to the near end of the hot rubber pipe body;
The needle head assembly is provided with a hot glue channel, at least part of the needle head assembly is rotatably arranged in the mounting hole, and the hot glue channel is communicated with the inner cavity of the hot glue pipe body;
The outer peripheral surface of the connecting nut is sequentially provided with a protruding part and external threads along the direction from the distal end to the proximal end of the connecting nut;
the outer diameter of the protruding part is larger than that of the external thread, the external thread is in threaded connection with the inner cavity wall of the hot rubber tube body, and one end, close to the external thread, of the protruding part is abutted against the hot rubber tube body;
The needle head assembly comprises a needle sleeve and a needle body;
The needle sleeve extends into the mounting hole from the distal end of the connecting nut and is rotatably connected with the mounting hole;
the needle sleeve is provided with a first through hole and the needle body is provided with a second through hole along the direction from the far end to the near end of the connecting nut;
A portion of the needle body is engaged with the first through hole, a remaining portion of the needle body extends out of the first through hole from a distal end of the needle hub, and movement of the needle body with respect to an axial direction of the first through hole is restricted;
the first through hole and the second through hole jointly form the hot glue channel.
2. The glue injection needle of claim 1, wherein:
The bulge is an annular bulge which is arranged around the distal end of the connecting nut to the proximal end;
The glue injection needle further comprises a gasket, and the gasket is arranged between the protruding portion and the abutting surface of the hot glue pipe body.
3. The glue injection needle of claim 1, wherein:
The glue injection needle also comprises a damping ring, wherein the damping ring is positioned between the abutting surfaces of the connecting nut and the needle head assembly and is abutted against the needle head assembly and the connecting nut at the same time so as to damp the rotation of the needle head assembly relative to the mounting hole.
4. A glue injection needle according to claim 3, wherein:
the proximal end or the distal end of the connecting nut is provided with an annular groove communicated with the mounting hole;
the annular groove and the needle assembly cooperate to define an annular space in which the dampening ring is mounted.
5. The glue injection needle of claim 1, wherein:
the needle head assembly further comprises a guide sleeve, and a third through hole is formed in the guide sleeve along the direction from the distal end to the proximal end of the connecting nut;
The part of the needle sleeve, which is positioned outside the distal end of the connecting nut, is provided with an annular boss, and the annular boss is abutted with the connecting nut;
One end of the guide sleeve extends into the first through hole from the proximal end of the needle sleeve and is in interference fit with the inner wall of the first through hole, the end of the guide sleeve extending into the first through hole is abutted against the end part of the needle body, and the other end of the guide sleeve is positioned outside the first through hole and abutted against the proximal end of the connecting nut;
the second through hole and the third through hole form the hot glue channel together.
6. The glue injection needle of claim 5, wherein:
the distal end of the connecting nut is provided with an annular groove communicated with the mounting hole;
the annular boss is disposed about the distal end of the coupling nut in a proximal direction, the annular boss and the annular groove together defining an annular space in which the damping ring is mounted.
7. The glue injection needle of claim 5, wherein:
the first through hole comprises a first hole part and a second hole part which are sequentially arranged along the direction from the proximal end to the distal end of the connecting nut;
The inner diameter of the first hole part is larger than that of the second hole part, and a transition inclined plane is arranged at the joint of the first hole part and the second hole part;
The part of the needle body positioned in the first through hole is matched with the second hole part and the transition inclined plane at the same time;
The guide sleeve is positioned at one end of the first through hole, extends into the first hole part and is in interference fit with the inner wall of the first hole part, and one end of the guide sleeve extending into the first hole part is abutted against the needle body so as to limit the movement of the needle body in the distal direction along the proximal end of the connecting nut.
8. A hot melt gutta-percha gun, which is characterized in that:
The hot-melt gutta-percha gun comprises a push rod and the glue injection needle as set forth in any one of claims 1 to 7;
the push rod part extends into the inner cavity of the hot glue pipe body from the proximal end of the hot glue pipe body and is movably connected with the inner cavity of the hot glue pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010102340.0A CN111134874B (en) | 2020-02-19 | 2020-02-19 | Glue injection needle and hot melt gutta-percha gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010102340.0A CN111134874B (en) | 2020-02-19 | 2020-02-19 | Glue injection needle and hot melt gutta-percha gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111134874A CN111134874A (en) | 2020-05-12 |
| CN111134874B true CN111134874B (en) | 2024-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010102340.0A Active CN111134874B (en) | 2020-02-19 | 2020-02-19 | Glue injection needle and hot melt gutta-percha gun |
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| CN113828476A (en) * | 2020-06-23 | 2021-12-24 | 三赢科技（深圳）有限公司 | Gluing device |
| CN115137477A (en) * | 2022-09-05 | 2022-10-04 | 外科先锋(北京)医疗器械有限公司 | Rotatable scalpel and assembling method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101674786A (en) * | 2007-04-05 | 2010-03-17 | 李仁焕 | Needle device for root canal treatment |
| CN209437389U (en) * | 2018-12-10 | 2019-09-27 | 卡瓦科尔牙科医疗器械（苏州）有限公司 | Injecting glue needle |
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| CN205549083U (en) * | 2016-03-01 | 2016-09-07 | 西安交通大学第一附属医院 | Take rotation function's liposuction needle |
| CN108720943A (en) * | 2018-05-31 | 2018-11-02 | 广州泰莱医疗设备有限公司 | A kind of intelligence heated gutta-percha pen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674786A (en) * | 2007-04-05 | 2010-03-17 | 李仁焕 | Needle device for root canal treatment |
| CN209437389U (en) * | 2018-12-10 | 2019-09-27 | 卡瓦科尔牙科医疗器械（苏州）有限公司 | Injecting glue needle |
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