CN111166509B - Glue injection needle and glue injection device - Google Patents
Glue injection needle and glue injection device Download PDFInfo
- Publication number
- CN111166509B CN111166509B CN202010096888.9A CN202010096888A CN111166509B CN 111166509 B CN111166509 B CN 111166509B CN 202010096888 A CN202010096888 A CN 202010096888A CN 111166509 B CN111166509 B CN 111166509B
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- China
- Prior art keywords
- needle
- tube
- glue injection
- connecting piece
- sleeve
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Links
- 238000002347 injection Methods 0.000 title claims abstract description 78
- 239000007924 injection Substances 0.000 title claims abstract description 78
- 239000003292 glue Substances 0.000 title claims abstract description 76
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 230000013011 mating Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 11
- 239000000899 Gutta-Percha Substances 0.000 description 10
- 240000000342 Palaquium gutta Species 0.000 description 10
- 229920000588 gutta-percha Polymers 0.000 description 10
- 210000004262 dental pulp cavity Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 208000007147 dental pulp necrosis Diseases 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition 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
-
- 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
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/62—Applicators, e.g. syringes or guns
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
The embodiment of the invention provides a glue injection needle and a glue injection device, and relates to the field of medical instruments. The embodiment of the invention provides a glue injection needle which comprises a connecting piece, a needle tube assembly and an elastic piece. The connecting piece is used for being connected with the heating tube. The needle tube assembly comprises a needle tube and a needle sleeve, the needle sleeve is rotatably connected to the connecting piece, the needle tube is sleeved on the needle sleeve and is relatively fixed with the needle tube, the needle tube can be driven to rotate by rotating the needle sleeve, the needle tube is adjusted, and the needle tube is adjusted only by rotating the needle tube relative to the existing glue injection needle, so that the adjustment is more convenient. The elastic piece is matched with the needle sleeve and the connecting piece in a detachable mode, damping can be provided for relative rotation of the needle sleeve and the connecting piece through the elastic piece, rotating force can be controlled more conveniently, operation is more accurate, and the size of damping received when the needle sleeve and the connecting piece rotate can be changed through changing different elastic pieces according to different doctors and use environments, so that applicability and accuracy are improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a glue injection needle and a glue injection device.
Background
Root canal therapy is a procedure in dentistry for the treatment of pulp necrosis and root canal filling, one of the important steps of root canal therapy.
When filling root canal, the use mode of the hot melt gutta-percha gun is as follows: putting the gutta-percha into the gutta-percha inlet, pushing the gutta-percha into the heating cavity by the pushing rod, simultaneously extruding the gutta-percha into the glue injection needle after heating and melting the gutta-percha, finally conveying the melted gutta-percha into a root canal for filling by a small needle tube, and requiring the needle tube to rotate in the treatment process. The existing glue injection needle is inconvenient to rotate when the needle tube rotates, the rotation force is difficult to control, and the operation is difficult.
Disclosure of Invention
The invention aims to provide a glue injection needle, which can solve the technical problems that a needle tube is inconvenient to rotate, the rotation force is difficult to control and the operation is difficult in the prior art.
The invention further aims to provide the glue injection device which can solve the technical problems that in the prior art, the needle tube is inconvenient to rotate, the rotation force is difficult to control and the operation is difficult.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a glue injection needle, which comprises a connecting piece, a needle tube assembly and an elastic piece;
the connecting piece is used for being connected with the heating tube;
The needle tube assembly comprises a needle tube and a needle sleeve, the needle sleeve is sleeved with the needle tube and is relatively fixed with the needle tube, and the needle sleeve is rotatably connected with the connecting piece;
the elastic piece is detachably matched with the needle sleeve and the connecting piece at the same time, so that the relative rotation of the needle sleeve and the connecting piece is damped through the elastic force of the elastic piece.
Optionally, the connecting piece is detachably connected with the needle sleeve, and a containing cavity for containing the elastic piece is formed between the inner wall of the connecting piece and the outer peripheral wall of the needle sleeve.
Optionally, the needle tube assembly further comprises a limiting sleeve detachably connected with the needle sleeve, a first limiting protrusion is arranged at one end, far away from the needle sleeve, of the limiting sleeve, and a second limiting protrusion is arranged at one end, far away from the limiting sleeve, of the needle sleeve; the connecting piece is provided with a first end face and a second end face which are opposite, and the first limiting protrusion and the second limiting protrusion are respectively used for being in butt joint limit with the first end face and the second end face.
Optionally, a fitting protrusion is further disposed on a peripheral wall of the limiting sleeve, and the fitting protrusion is used for being in interference fit with the needle sleeve, so that the limiting sleeve and the needle sleeve are relatively fixed.
Optionally, the glue injection needle further comprises a first gasket, and the first gasket is matched with the needle sleeve and the connecting piece at the same time so as to reduce the friction coefficient between the needle sleeve and the connecting piece.
Optionally, a first mounting hole and a second mounting hole which are mutually communicated are formed in the needle sleeve, and the radial size of the first mounting hole is larger than that of the second mounting hole; the needle tube comprises a tube part and a matching part which are connected with each other, the tube part is arranged in the second mounting hole in a penetrating mode, and the matching part is matched with the first mounting hole in a sealing mode.
Optionally, the needle tube further includes a protruding portion disposed at the mating portion, and the protruding portion is configured to be interference-fitted with the second mounting hole.
Optionally, the glue injection needle further comprises a heating tube in threaded connection with the connecting piece and a second gasket arranged between the heating tube and the connecting piece, wherein the second gasket is used for sealing a gap between the connecting piece and the heating tube.
Optionally, the elastic element is a spring.
The embodiment of the invention also provides a glue injection device. The glue injection device comprises any one of the glue injection needles.
The glue injection needle and the glue injection device have the beneficial effects that:
The embodiment of the invention provides a glue injection needle which comprises a connecting piece, a needle tube assembly and an elastic piece. The connecting piece is used for being connected with the heating tube. The needle tube component comprises a needle tube and a needle sleeve, the needle sleeve is rotatably connected to the connecting piece, and the needle sleeve is sleeved on the needle tube and is relatively fixed with the needle tube, so that when the needle tube needs to be rotated, the needle tube can be driven to rotate by rotating the needle sleeve, the needle tube is adjusted, and the needle tube is adjusted only by rotating the needle tube relative to the existing glue injection needle, and the adjustment is more convenient. The elastic piece is matched with the needle sleeve and the connecting piece in a detachable mode, damping can be provided for relative rotation of the needle sleeve and the connecting piece through the elastic piece, so that a medical worker can control rotating force more conveniently when rotating the needle sleeve, operation is more accurate, and the elastic piece is matched with the needle sleeve and the connecting piece in a detachable mode, so that different doctors and service environments can be met by changing the damping size received when the needle sleeve and the connecting piece rotate through changing different elastic pieces, and applicability and accuracy are improved.
The embodiment of the invention also provides a glue injection device which comprises the glue injection needle. Because this injecting glue device includes foretell injecting glue needle, consequently also have and adjust convenient operation more accurate, can adjust damping size according to different situations, the good beneficial effect of suitability, accuracy.
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 the overall structure of a glue injection needle according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure of a glue injection needle according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a needle sleeve in a glue injection needle according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a needle tube in a glue injection needle according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a needle sheath in a glue injection needle according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a needle tube in a glue injection needle according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a stop collar in a glue injection needle according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional structure of a connecting piece in a glue injection needle according to an embodiment of the present invention.
Icon: 100-injecting glue needle; 110-a connector; 111-a first end; 112-a first end face; 113-a second end; 114-a second end face; 115-a first bore section; 116-a second bore section; 117—first thread; 120-heating tubes; 121-lumen; 122-second threads; 131-a first gasket; 132-a second gasket; 133-a receiving chamber; 134-elastic member; 140-needle sleeve; 141-a first mounting hole; 142-a second mounting hole; 143-a second conical surface; 144-a second arc surface; 145-a second limit protrusion; 150-needle tube; 151-tube part; 152-mating portion; 153-glue injection channel; 154-a first conical surface; 155-a first arc surface; 156-a boss; 160-limiting sleeves; 161-first limit projection; 162-plug-in portion; 163-mating projections; 164-guiding surface.
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 denote 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, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Fig. 1 is a schematic overall structure of a glue injection needle 100 according to the present embodiment, and fig. 2 is a schematic cross-sectional structure of the glue injection needle 100 according to the present embodiment. Referring to fig. 1 and 2 in combination, the present embodiment provides a glue injection needle 100, and accordingly, a glue injection device (not shown) is provided.
The glue injection device comprises a glue injection needle 100, a tooth glue inlet piece (not shown in the figure) connected to the glue injection needle 100 and a pushing rod (not shown in the figure) penetrating through the tooth glue inlet piece, and when the glue injection device is used, tooth glue is placed into the tooth glue inlet piece, and then the tooth glue is pushed into the glue injection needle 100 through the pushing rod.
The injection needle 100 includes a connector 110, a needle cannula assembly, and an elastomeric member 134. The connection member 110 is used to connect with the heat generating tube 120. The needle tube assembly comprises a needle tube 150 and a needle sleeve 140, the needle sleeve 140 is rotatably connected to the connecting piece 110, the needle tube 150 is sleeved on the needle sleeve 140 and is fixed relative to the needle tube 150, therefore, when the needle tube 150 needs to be rotated, the needle tube 150 can be driven to rotate by rotating the needle sleeve 140, the rotation adjustment of the needle tube 150 is realized, and the adjustment is more convenient compared with the operation mode that the needle tube 150 is directly operated by the existing glue injection needle 100 to rotate for adjustment.
The elastic piece 134 is detachably matched with the needle sleeve 140 and the connecting piece 110, and the elastic piece 134 can provide damping for the relative rotation of the needle sleeve 140 and the connecting piece 110, so that medical staff can control the rotating force more conveniently when rotating the needle sleeve 140, the operation is more accurate, and the elastic piece 134 is detachably matched with the needle sleeve 140 and the connecting piece 110, so that the damping received when the needle sleeve 140 and the connecting piece 110 rotate can be changed by changing different elastic pieces 134 according to different doctors and service environments, and the applicability and the accuracy are improved.
The following further describes the injection needle 100 provided in this embodiment:
With continued reference to fig. 1 and fig. 2, in the present embodiment, along the axial direction of the connecting member 110, the connecting member 110 includes a first end 111 and a second end 113 opposite to each other, specifically, one end of the connecting member 110, which is close to the heating tube 120, is the first end 111, and one end of the connecting member 110, which is far from the heating tube 120, is the second end 113. A thread, which is a first thread 117, is provided on the outer circumferential surface of the first end 111. The glue injection needle 100 further comprises a heating tube 120, wherein the heating tube 120 is a circular tubular member, and the inner wall surface of the heating tube is provided with threads, and the threads are second threads 122. The first screw 117 is engaged with the second screw 122 so that the connection member 110 is screw-fixed with the heating tube 120, and at the same time, the second end 113 of the connection member 110 is positioned outside the heating tube 120.
Further, the injection needle 100 further includes a second gasket 132, and the second gasket 132 is disposed between the heating tube 120 and the connection member 110, so as to close a gap between the connection member 110 and the heating tube 120. Specifically, the outer peripheral surface of the second end 113 is larger than the outer peripheral surface of the first end 111, that is, the connection between the first end 111 and the second end 113 is in a step structure, the second gasket 132 is disposed at the step structure, and two sides of the second gasket 132 are respectively in pressing and sealing contact with the second end 113 and the heating tube 120. Thereby closing the gap formed at the connection of the first thread 117 and the second thread 122 and effectively preventing the gutta-percha from leaking from the gap. Optionally, the second gasket 132 is a copper gasket, so that glue overflow can be effectively avoided.
Alternatively, the number of the second washers 132 is two, and two second washers 132 are stacked between the second end 113 and the heat generating tube 120. It will be appreciated that the number of second washers 132 is not limited herein, and in other embodiments, the number of second washers 132 may be specifically set as desired, such as one, three, etc. Similarly, the material of the second gasket 132 may be specifically set according to the requirement, and is not limited to copper.
Fig. 3 is a schematic structural diagram of the needle sleeve 140 in the injection needle 100 according to the present embodiment, and fig. 4 is a schematic structural diagram of the needle tube 150 in the injection needle 100 according to the present embodiment. Referring to fig. 1-4, in the present embodiment, the injection needle 100 further includes a needle tube assembly. The needle tube assembly comprises a needle tube 150 and a needle sleeve 140, the needle sleeve 140 is in a tubular shape as a whole, the needle sleeve 140 is sleeved outside the needle tube 150, and the needle sleeve 140 and the needle tube 150 are relatively fixed. The needle sleeve 140 is rotatably connected with the connecting piece 110, so that when the needle tube 150 needs to be rotated to adjust the needle tube 150, the needle tube 150 can be driven to rotate by operating the needle sleeve 140, and the operation is more convenient.
Fig. 5 is a schematic cross-sectional view of the needle sleeve 140 in the injection needle 100 according to the present embodiment. Referring to fig. 2 and 5 in combination, in the present embodiment, the needle sleeve 140 has a first mounting hole 141 and a second mounting hole 142 that are mutually communicated, and the radial dimension of the first mounting hole 141 is greater than the radial dimension of the second mounting hole 142. The needle tube 150 includes a tube portion 151 and a fitting portion 152 connected to each other, the tube portion 151 being inserted into the second mounting hole 142, and the fitting portion 152 being in sealing engagement with the first mounting hole 141. Specifically, the first mounting hole 141 and the second mounting hole 142 are circular holes, and the first mounting hole 141 and the second mounting hole 142 are coaxially disposed. The radial dimension of the fitting portion 152 of the needle tube 150 is larger than the radial dimension of the tube portion 151 of the needle tube 150, and the radial dimension of the fitting portion 152 is larger than the radial dimension of the second mounting hole 142, so that the fitting portion 152 is in sealing engagement with the hole bottom of the first mounting hole 141 when the tube portion 151 is fitted into the second mounting hole 142 from the first mounting hole 141. The needle tube 150 has a glue injection channel 153 penetrating the tube portion 151 and the mating portion 152, and the glue injection channel 153 communicates with the inner cavity 121 of the heating tube 120 through the first mounting hole 141, so that, in use, the melted gutta-percha in the heating tube 120 can be injected smoothly through the glue injection channel 153.
Fig. 6 is a schematic cross-sectional view of the needle tube 150 in the injection needle 100 according to the present embodiment. Referring to fig. 2, 5 and 6, further, the outer circumference of the mating portion 152 has a first tapered surface 154, and the radial dimension of the first tapered surface 154 gradually decreases along the direction approaching the pipe portion 151, so that the reliability of the mating between the first tapered surface 154 and the first mounting hole 141 can be ensured. Further, the hole bottom of the first mounting hole 141 includes a tapered surface, which is a second tapered surface 143, and the second tapered surface 143 is in sealing contact with the first tapered surface 154, so that the sealing engagement between the engaging portion 152 and the first mounting hole 141 is achieved. Optionally, the taper angle of the first taper 154 is slightly greater than the taper angle of the second taper 143 to ensure a sealing engagement of the first taper 154 and the second taper 143.
Further, the mating portion 152 further includes an arc surface, where the arc surface is a first arc surface 155, one end of the first arc surface 155 is connected with the first conical surface 154, and the other end is connected with the outer wall of the tube portion 151, that is, the first conical surface 154 and the tube portion 151 are smoothly transited through the first arc surface 155. The hole bottom of the first mounting hole 141 further comprises an arc surface, the arc surface is a second arc surface 144, one end of the second arc surface 144 is connected with the second conical surface 143, and the other end of the second arc surface 144 is connected to the peripheral surface of the second mounting hole 142, that is, the second conical surface 143 and the second mounting hole 142 are in smooth transition through the second arc surface 144.
Referring to fig. 2,4 and 6 in combination, in the present embodiment, the needle tube 150 further includes a protruding portion 156 disposed at the mating portion 152, the protruding portion 156 protrudes from the mating portion 152, and the protruding portion 156 is in interference fit with the first mounting hole 141, so that the needle tube 150 and the needle sleeve 140 are relatively fixed, and when the needle sleeve 140 rotates relative to the connecting member 110, the needle tube 150 rotates relative to the connecting member 110 under the driving of the needle sleeve 140, thereby realizing the adjustment of the needle tube 150. Further, the mating portion 152 further includes a cylindrical surface located on a side of the first conical surface 154 away from the first circular arc surface 155, that is, an outer side surface of the mating portion 152 is formed by the first circular arc surface 155, the first conical surface 154, and the cylindrical surface that are sequentially connected. The convex portion 156 is formed to protrude outward in the radial direction of the cylindrical surface, and the convex portion 156 has a quarter sphere shape. It should be noted that, in this embodiment, the number of the protruding portions 156 is one, and the matching requirement can be met by only setting one protruding portion 156, so that the needle tube 150 and the pillow case are relatively fixed, and the installation difficulty can be effectively reduced.
Referring to fig. 2, in the present embodiment, the needle sleeve 140 is detachably connected to the connecting member 110, and a receiving cavity 133 for receiving the elastic member 134 is formed between an inner wall of the connecting member 110 and an outer circumferential wall of the needle sleeve 140. During installation, the accommodating cavity 133 is formed by connecting the needle sleeve 140 and the connecting piece 110, the elastic piece 134 is arranged in the accommodating cavity 133, so that damping is provided for relative rotation of the needle sleeve 140 and the connecting piece 110, and when the elastic piece 134 needs to be detached, the accommodating cavity 133 is opened by detaching the needle sleeve 140 and the connecting piece 110, and then the elastic piece 134 is taken out, so that replacement of the elastic piece 134 is realized.
Alternatively, the elastic member 134 is a spring. Because the space of the accommodating cavity 133 formed after the needle sleeve 140 and the connecting piece 110 are connected is fixed, that is, the size of the elastic piece 134 is fixed after the elastic piece 134 is installed in the accommodating cavity 133, the compression amount of the elastic piece 134 after being installed in the accommodating cavity 133 can be accurately determined by setting the elastic piece 134 as a spring, and then the damping amount of the elastic piece 134 generated by the relative movement of the needle sleeve 140 and the connecting piece 110 can be accurately set. It will be appreciated that in other embodiments, the particular type of resilient member 134 may be selected as desired, such as being provided as a resilient rubber member.
Fig. 7 is a schematic structural diagram of the stop collar 160 in the injection needle 100 according to the present embodiment. Referring to fig. 2 and 7 in combination, the needle cannula assembly further includes a stop collar 160 removably coupled to the needle hub 140. Specifically, one end of the stop collar 160 is detachably connected with the needle sleeve 140, one end of the stop collar 160, which is far away from the needle sleeve 140, is provided with a first stop protrusion 161, one end of the needle sleeve 140, which is far away from the stop collar 160, is provided with a second stop protrusion 145, and after the stop collar 160 is connected with the needle sleeve 140, the first stop protrusion 161 and the second stop protrusion 145 are oppositely arranged at intervals, so that a clamping groove is formed between the first stop protrusion 161 and the second stop protrusion 145, the connecting piece 110 is clamped in the clamping groove, and the disassembly of the needle sleeve 140 and the connecting piece 110 is realized through the disassembly of the needle sleeve 140 and the stop collar 160. Specifically, the connecting member 110 has a first end surface 112 and a second end surface 114 opposite to each other, where the first end surface 112 is an end surface of the first end 111 of the connecting member 110 away from the second end 113, and the second end surface 114 is an end surface of the second end 113 away from the first end 111. When the connecting piece 110 is clamped in the clamping groove, the first end face 112 and the second end face 114 are respectively used for being in butt joint with the first limiting protrusion 161 and the second limiting protrusion 145 for limiting. Optionally, the stop collar 160 further includes an insertion portion 162 connected to the first stop protrusion 161, and the stop collar 160 is inserted into the first mounting hole 141 through the insertion portion 162, so as to realize detachable connection between the stop collar 160 and the needle sleeve 140.
Alternatively, the first limiting protrusion 161 is an annular protrusion formed by protruding radially outwards from the outer circumferential surface of the end of the limiting sleeve 160 away from the needle sleeve 140. The second limiting protrusion 145 is an annular protrusion formed by protruding the outer circumferential surface of the end of the needle sleeve 140 away from the limiting sleeve 160 radially outwards. Thereby forming an annular clamping groove between the first and second limit protrusions 161 and 145. The connector 110 is a generally circular tubular member having a circular through hole. During installation, the connecting piece 110 is sleeved on the needle sleeve 140, then one end of the limiting sleeve 160 is inserted into the first mounting hole 141 until the first limiting protrusion 161 of the limiting sleeve 160 abuts against the end face of the needle sleeve 140, and the connecting piece 110 is clamped in the clamping groove.
Further, the stop collar 160 further includes a fitting protrusion 163 provided on a peripheral wall of the stop collar 160. The removable connection of the stop collar 160 and the needle sleeve 140 is realized through the interference fit of the matching bulge 163 and the needle sleeve 140, meanwhile, when the matching bulge 163 is in interference fit with the needle sleeve 140, the stop collar 160 and the needle sleeve 140 are relatively fixed, namely, the needle tube assembly forms a whole after connection, and when the needle sleeve 140 is operated to rotate relative to the connecting piece 110, the stop collar 160 and the needle tube 150 synchronously rotate relative to the connecting piece 110 along with the needle sleeve 140. Specifically, the mating protrusion 163 is a tiny protrusion formed by protruding the peripheral wall of the plugging portion 162 radially outward, and can be interference fit with the first mounting hole 141. Further, the stop collar 160 is provided with a through hole, one end of the through hole is communicated with the glue injection channel 153 of the needle tube 150 through the first mounting hole 141, and the other end is communicated with the inner cavity 121 of the heating tube 120. Alternatively, an end of the fitting projection 163 remote from the first limit projection 161 is connected to the peripheral wall of the insertion portion 162 through the guide surface 164, thereby facilitating the installation of the limit cap 160. Alternatively, the guide surface 164 is a conical surface.
Fig. 8 is a schematic cross-sectional structure of the connecting member 110 in the injection needle 100 according to the present embodiment. Referring to fig. 2 and 8 in combination, in the present embodiment, the through hole of the connecting member 110 includes a first hole section 115 and a second hole section 116 that are mutually communicated, the first hole section 115 is substantially located at the first end 111, the second hole section 116 is substantially located at the second end 113, and the radial dimension of the second hole section 116 is greater than the radial dimension of the first hole section 115. When the connecting piece 110 is clamped in the clamping groove, the first hole section 115 and the second hole section 116 are matched with the outer circumferential wall of the needle sleeve 140, and the outer circumferential wall of the needle sleeve 140 is a cylindrical surface, so that when the radial dimension of the first hole section 115 is matched with the outer circumferential wall dimension of the needle sleeve 140, a space is formed between the second hole section 116 and the outer circumferential wall of the needle sleeve 140, and the space is the accommodating cavity 133 formed between the inner wall of the connecting piece 110 and the outer circumferential wall of the needle sleeve 140. When the needle tube 150 is installed, the needle tube 150 is firstly installed in the needle sleeve 140, then the elastic piece 134 is sleeved on the needle sleeve 140 from one end of the needle sleeve 140 far away from the second limiting protrusion 145, then the connecting piece 110 is sleeved on the needle sleeve 140, then the limiting sleeve 160 is installed in the needle sleeve 140 until the first limiting protrusion 161 abuts against the end face of the needle sleeve 140, the connecting piece 110 has a trend of moving towards the direction of being separated from the needle sleeve 140 under the elastic force of the elastic piece 134, and then the first end face 112 of the connecting piece 110 abuts against the first limiting protrusion 161, so that the connecting piece 110 is limited between the first limiting protrusion 161 and the second limiting protrusion 145. Because one end of the stop collar 160, namely, the insertion part 162, is inserted and positioned in the needle sleeve 140, and the other end of the stop collar 160, namely, the first stop protrusion 161, is in tight fit with the first end face 112 of the connecting piece 110, a gap formed between the connecting piece 110 and the needle sleeve 140 can be closed through the first stop protrusion 161, and gutta-percha is prevented from leaking from the gap.
Referring to fig. 2, in the present embodiment, the injection needle 100 further includes a first washer 131, and the first washer 131 cooperates with the needle sheath 140 and the connecting member 110 to prevent friction between the needle sheath 140 and the connecting member 110. Specifically, the first gasket 131 is disposed in the accommodating cavity 133, and one end of the elastic member 134 abuts against the first gasket 131, and the other end abuts against the bottom of the second hole section 116 of the connecting member 110. After the first washer 131 is disposed between the needle hub 140 and the connector 110, the first washer 131 isolates the needle hub 140 from the connector 110, thereby avoiding friction caused by direct contact when the needle hub 140 and the connector 110 rotate relative to each other, and rotating uniformly in all directions. Optionally, the needle sheath 140 and the connecting element 110 are both made of metal. The second gasket 132 is made of plastic.
According to the glue injection needle 100 provided in this embodiment, the installation process of the glue injection needle 100 is as follows:
In the process of mounting, the needle cannula 150 is first fitted into the needle sheath 140, and the boss 156 is plastically deformed during the axial movement of the needle cannula 150 relative to the needle sheath 140, thereby fixing the needle cannula 150 and the needle sheath 140 relative to each other after mounting. The first washer 131, the elastic member 134 and the connecting member 110 are then sleeved outside the needle sheath 140 once, and then the stop collar 160 is installed in the needle sheath 140 until the first stop protrusion 161 of the stop collar 160 abuts against the end surface of the needle sheath 140, the elastic member 134 is compressed, and the connecting member 110 abuts against the first stop protrusion 161 under the action of the elastic member 134. Finally, two second washers 132 are sleeved on the connecting piece 110, and the heating tube 120 is screwed on the connecting piece 110.
The glue injection needle 100 provided in this embodiment has at least the following advantages:
According to the glue injection needle 100 provided by the embodiment of the invention, the needle tube 150 and the needle sleeve 140 are relatively fixedly arranged, so that the needle tube 150 can be adjusted by operating the needle sleeve 140 to rotate relative to the connecting piece 110, and the adjustment is more convenient. And be provided with the elastic component 134 between connecting piece 110 and needle cover 140 to the relative rotation of needle cover 140 and connecting piece 110 produces the damping through the elastic force of elastic component 134, and then helps improving the regulation precision of needle tubing 150, and further, the elastic component 134 is the spring that detachably set up between needle cover 140 and connecting piece 110, can carry out the accurate regulation to the damping size through changing the spring, makes the injecting glue needle 100 can be applicable to different suitability and different service environment, effectively improves the use impression.
The present embodiment also provides a glue injection device, which includes the glue injection needle 100. Because this injecting glue device includes the injecting glue needle 100 that above-mentioned, consequently also have the use and feel well, adjust convenient and adjust the high beneficial effect of precision.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The glue injection needle is characterized by comprising a connecting piece, a needle tube assembly and an elastic piece;
the connecting piece is used for being connected with the heating tube;
The needle tube assembly comprises a needle tube and a needle sleeve, the needle sleeve is sleeved with the needle tube and is relatively fixed with the needle tube, and the needle sleeve is rotatably connected with the connecting piece;
the elastic piece is detachably matched with the needle sleeve and the connecting piece at the same time, so that the relative rotation of the needle sleeve and the connecting piece is damped through the elastic force of the elastic piece.
2. The glue injection needle of claim 1, wherein the connector is detachably connected to the needle hub, and a receiving cavity for receiving the elastic member is formed between an inner wall of the connector and an outer circumferential wall of the needle hub.
3. The injection needle of claim 2 wherein the needle cannula assembly further comprises a stop collar removably connected to the needle hub, the stop collar having a first stop projection at an end thereof remote from the needle hub and a second stop projection at an end thereof remote from the stop collar; the connecting piece is provided with a first end face and a second end face which are opposite, and the first limiting protrusion and the second limiting protrusion are respectively used for being in butt joint limit with the first end face and the second end face.
4. A glue injection needle according to claim 3, wherein the peripheral wall of the stop collar is further provided with a mating protrusion, and the mating protrusion is used for being in interference fit with the needle collar so as to fix the stop collar and the needle collar relatively.
5. The injection needle of claim 1 further comprising a first washer that cooperates with both the needle hub and the connector to reduce a coefficient of friction between the needle hub and the connector.
6. The glue injection needle of claim 1, wherein the needle sleeve is internally provided with a first mounting hole and a second mounting hole which are communicated with each other, and the radial dimension of the first mounting hole is larger than that of the second mounting hole; the needle tube comprises a tube part and a matching part which are connected with each other, the tube part is arranged in the second mounting hole in a penetrating mode, and the matching part is matched with the first mounting hole in a sealing mode.
7. The injection needle of claim 6, wherein the needle cannula further comprises a boss disposed at the mating portion for interference fit with the second mounting hole.
8. The glue injection needle of claim 1, further comprising a heat pipe threadably connected to the connector and a second gasket disposed between the heat pipe and the connector, the second gasket for sealing a gap between the connector and the heat pipe.
9. The glue injection needle of any one of claims 1 to 8, wherein the resilient member is a spring.
10. A glue injection device, characterized in that it comprises a glue injection needle according to any one of claims 1-9.
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| CN202010096888.9A CN111166509B (en) | 2020-02-17 | 2020-02-17 | Glue injection needle and glue injection device |
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| CN202010096888.9A CN111166509B (en) | 2020-02-17 | 2020-02-17 | Glue injection needle and glue injection device |
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| CN111166509B true CN111166509B (en) | 2024-06-25 |
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| CN111616817B (en) * | 2020-06-10 | 2024-06-25 | 桂林市啄木鸟医疗器械有限公司 | Heat insulation sleeve for driving glue injection needle to rotate |
| CN112006756B (en) * | 2020-08-12 | 2022-05-31 | 云南省中医医院(云南中医药大学第一附属医院) | Intervertebral foramen mirror channel guide module and using method thereof |
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| CN211934366U (en) * | 2020-02-17 | 2020-11-17 | 桂林市啄木鸟医疗器械有限公司 | Glue injection needle and glue injection device |
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| KR20080003483U (en) * | 2008-07-08 | 2008-08-21 | (주)디엑스엠 | Obturator |
| US10172690B1 (en) * | 2017-07-10 | 2019-01-08 | Addent, Inc. | Device and method for heating dental composite materials |
| 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 |
| CN110464487A (en) * | 2019-09-05 | 2019-11-19 | 刘亚洲 | A kind of gutta-percha heating instrument |
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| CN211934366U (en) * | 2020-02-17 | 2020-11-17 | 桂林市啄木鸟医疗器械有限公司 | Glue injection needle and glue injection device |
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