CN112755338A - Accurate many needles syringe needle of calibration boss formula - Google Patents
Accurate many needles syringe needle of calibration boss formula Download PDFInfo
- Publication number
- CN112755338A CN112755338A CN202110154460.XA CN202110154460A CN112755338A CN 112755338 A CN112755338 A CN 112755338A CN 202110154460 A CN202110154460 A CN 202110154460A CN 112755338 A CN112755338 A CN 112755338A
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- Prior art keywords
- needle
- seat
- negative pressure
- adjusting
- adjusting knob
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3295—Multiple needle devices, e.g. a plurality of needles arranged coaxially or in parallel
- A61M5/3298—Needles arranged in parallel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/343—Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub
Abstract
A multi-needle injection needle with a boss accurately calibrated comprises a needle seat, a negative pressure seat, a conical seat, an adjusting knob, a needle tube and a needle adjusting spring; the outer side wall of the needle base is provided with a circumferentially extending adjusting boss, the end face of the adjusting boss is provided with a stepped groove, the side wall of the adjusting boss is provided with a tooth surface, the adjusting knob is correspondingly provided with a latch and a bulge which are matched with each other, the needle adjusting spring is sleeved on the conical base, the elastic restoring force of the needle adjusting spring acts on the adjusting knob, and the needle adjusting spring moves along the stepped groove on the adjusting boss of the needle base by rotating the adjusting knob, so that the negative pressure base axially moves relative to the needle base to control the length of a discharged needle; the design of the stepped groove contains the tolerance and deviation possibly generated by needle production, and the high-precision output of final needle adjustment can be realized; the needle seat and the negative pressure seat are matched with the guide post through the guide hole, so that the precision of the needle discharging length is ensured; the negative pressure seat is provided with a negative pressure input port and an inertia backflow prevention mechanism to prevent leakage from being sucked back to the negative pressure pipe to cause air path blockage.
Description
Technical Field
The invention belongs to the technical field of injectors, and particularly relates to a multi-needle injection needle head with a boss accurately calibrated.
Background
Most of the prior multi-needle injection needle products on the market are shown in fig. 1, and comprise a needle base 1, a shunt base 2, a negative pressure base 3, a conical base 4, an adjusting knob 5 and a needle tube 6. Inseparable lock about negative pressure seat 3 and adjust knob 5, awl seat 4 and 5 screw-thread fit of adjust knob, there is the external screw thread on the awl seat 4, adjust knob 5's centre bore has the internal thread, make negative pressure seat 3 reciprocate through rotatory adjust knob 5, and then negative pressure seat 3's play needle face a takes place to remove, thereby the distance that makes the needle tubing 6 of fixing on needle file 1 and reposition of redundant personnel seat 2 to negative pressure seat 3 play needle face a changes, realize the purpose of adjusting out needle length.
This way of adjusting the length of the needle is simple, but the requirements on the thread are high, and at the same time the whole process of rotating the adjusting knob 5 has the risk of achieving positioning at any time without drift angle. Moreover, because the stepless adjustment is adopted, how to combine the whole needle to realize accurate calibration and indicate the length of the needle adjustment is very difficult; without a scale, the user needs to use the naked eye to evaluate the error of 0.1mm in the adjustment, which is difficult to control. In addition, the position of the negative pressure input port of the negative pressure seat 3 is low, leakage often enters an external negative pressure pipe, negative pressure capacity is affected, the negative pressure pipe cannot be cleaned and accumulated for a long time, and the pipe can be blocked and pump parts of the system can be damaged.
Disclosure of Invention
The invention aims at the problems and provides a boss type multi-needle injection needle head with accurate calibration.
The purpose of the invention can be realized by the following technical scheme:
a multi-needle injection needle with a boss accurately calibrated comprises a needle seat, a negative pressure seat, a conical seat, an adjusting knob and a needle tube, wherein the needle seat is installed in the negative pressure seat, one end face of the negative pressure seat is a needle outlet face, the other end of the negative pressure seat is used for placing the needle seat, the adjusting knob is installed on the needle seat, a transverse partition plate for dividing an inner cavity into two parts is arranged in the negative pressure seat, the conical seat penetrates through the adjusting knob, one end of the conical seat is connected with the needle seat through a sealant, the needle tube is fixed on the needle seat, the needle tube further comprises a needle adjusting spring, the needle adjusting spring is installed on the conical seat, two ends of the needle adjusting spring are respectively arranged on one end of the conical seat and the; more than two adjusting bosses extending along the circumferential direction are uniformly distributed on the outer side wall of the needle base along the circumferential direction, a stepped groove is formed in the end face of each adjusting boss along the extending direction, tooth surfaces are formed on the side wall along the extending direction, more than two clamping teeth matched with the stepped grooves of the adjusting bosses and more than two protrusions matched with the tooth surfaces of the adjusting bosses are uniformly distributed on the inner side wall of the adjusting knob along the circumferential direction; a negative pressure input port is arranged on the side wall of the inner cavity part of the needle seat of the negative pressure seat, and an inertia backflow preventing mechanism is arranged on a diaphragm plate of the negative pressure seat; the adjusting knob is rotated to enable the clamping teeth of the adjusting knob to move along the stepped groove on the adjusting boss of the needle base, then the adjusting knob drives the negative pressure base to axially move relative to the needle base, the axial relative position between the needle outlet surface of the negative pressure base and the needle tube on the needle base is changed to control the needle outlet length, meanwhile, the protrusion of the adjusting knob moves along the tooth surface on the adjusting boss of the needle base, and adjustment hand feeling and positioning between the adjusting knob and the needle base are achieved.
Furthermore, the needle seat and the negative pressure seat are respectively provided with a guide hole and a guide post which are matched in an axial guide way.
Furthermore, one end of each stepped groove of the needle base, corresponding to the lowest stepped surface, is provided with a first stop block, and the other end of each stepped groove corresponding to the highest stepped surface is provided with a second stop block. Furthermore, the second stop block is provided with an inclined surface connected with the highest step surface.
Further, at least one step of stepped surface of each stepped groove of the needle seat corresponds to one step of needle outlet length.
Furthermore, an annular clamping groove is formed in the end face of the other end of the negative pressure seat, an annular guide edge is formed in the end face of the opening of the adjusting knob, and the negative pressure seat and the adjusting knob are matched through the annular clamping groove and the annular guide edge to achieve axial tight connection and can rotate relatively.
Further, be equipped with first buckle on the other end lateral wall of negative pressure seat, be equipped with the second buckle on adjust knob's the lateral wall, axial block is realized through first buckle and second buckle cooperation to negative pressure seat and adjust knob.
Further, inertia anti-return mechanism on the cross slab of negative pressure seat includes basin column structure, opening, drainage post, basin column structure sets up on the cross slab and for the cross slab to the face protrusion of needle file, the face indent of needle file dorsad, is equipped with the opening of more than two non-orientation negative pressure input ports along circumference on the lateral wall of basin column structure, is equipped with the drainage post that sets up along the axis in the basin column structure.
Furthermore, the outer side walls of the negative pressure seat and the adjusting knob are respectively provided with an indicating arrow and scales.
Further, be equipped with on the needle file and supply the cavity that the one end of awl seat was put into and a plurality of first syringe mounting holes of intercommunication cavity bottom surface, constitute the reposition of redundant personnel chamber between the cavity bottom surface of needle file and the one end terminal surface of awl seat, be equipped with the first runner of connecting a plurality of first syringe mounting holes on the cavity bottom surface of needle file, be equipped with a plurality of second syringe mounting holes that correspond with a plurality of first syringe mounting holes on the negative pressure seat, be equipped with the passageway that communicates with the reposition of redundant personnel chamber on the awl seat, be equipped with on the one end terminal surface of awl seat with the passageway be connected and with the second runner that first runner corresponds, many every needle tubing of needle tubing is fixed in the first syringe mounting hole to wear to locate in the second syringe mounting hole.
Compared with the prior art, the invention has the beneficial effects that:
(1) the outer side wall of the needle seat is provided with a regulating boss extending circumferentially, the end surface of the regulating boss is provided with a stepped groove, the side wall of the regulating boss is provided with a tooth surface, the regulating knob is provided with a latch combined with the stepped surface of the stepped groove and a bulge clamped with the tooth surface of the tooth surface, a needle regulating spring is additionally arranged on the conical seat, the elastic restoring force of the needle regulating spring acts on the regulating knob to ensure that the latch and the bulge of the regulating knob are tightly matched with the regulating boss of the needle seat, when the regulating knob is rotated, the latch of the regulating knob moves along the stepped groove on the regulating boss of the needle seat, the adjusting knob drives the negative pressure seat to move axially relative to the needle seat, so that the axial relative position between the needle outlet surface of the negative pressure seat and the needle tube on the needle seat is changed to control the needle outlet length, meanwhile, the bulge of the adjusting knob moves along the tooth surface on the adjusting boss of the needle seat, so that the adjusting hand feeling and the positioning between the adjusting knob and the needle seat are realized;
(2) at least one step surface of each step groove corresponds to the length of a first step needle, the needle adjusting deviation between step surfaces is 0.02mm, the tolerance and deviation which are possibly generated in needle production are contained in the step surfaces through the arrangement of the multi-step surfaces, after the production and assembly of the multi-needle injection molding needle head are completed, the relevant needle adjusting indication is calibrated through the measurement after needle adjustment, the high-precision output of the final needle adjustment is realized, and the final needle adjusting precision is smaller than +/-0.05 mm;
(3) the matching of the latch of the adjusting knob and the stepped groove of the needle seat is plane matching, and compared with the existing thread matching, the precision is high and the flatness is good;
(4) the needle seat and the negative pressure seat are respectively provided with a plurality of guide holes and a plurality of guide posts which are matched in a guiding way, so that the needle seat and the negative pressure seat can precisely and concentrically move axially, the precision of the length of the needle can be ensured, and the precise calibration can be easily realized;
(5) the position of a negative pressure input port on the negative pressure seat is adjusted, and the sealing between the outer side wall of the needle seat and the inner side wall of the negative pressure seat by the sealing ring is increased, so that the needle seat and the negative pressure seat are tightly matched in the negative pressure process of sucking the skin by the multi-needle injection needle head, and the needle seat cannot be separated because an operator pulls the skin;
(6) an inertia backflow preventing mechanism on a diaphragm plate of the negative pressure seat is added, and the position adjustment of a negative pressure input port on the negative pressure seat is matched, so that possible leakage liquid in the injection process of the multi-needle injection needle head is prevented from entering an external negative pressure pipe through the negative pressure input port 306;
(7) the negative pressure seat and the adjusting knob are respectively provided with an indicating arrow and scales, and the adjusting needle in practical application can be adjusted according to the scales, so that errors caused by naked eye judgment are avoided.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art multiple needle injection needle;
FIG. 2 is a schematic view of the multi-needle injection needle of the present invention;
FIG. 3 is an exploded view of the multi-needle tip of the present invention;
FIG. 4 is a schematic cross-sectional view of the multi-needle injection needle of the present invention;
FIG. 5 is another schematic cross-sectional view of the multi-needle injection needle of the present invention;
FIG. 6 is a schematic structural view of a needle holder in the multi-needle syringe needle of the present invention;
FIG. 7 is a schematic view of the structure of the negative pressure seat in the multi-needle injection needle of the present invention;
FIG. 8 is another schematic view of the negative pressure seat in the multi-needle injection needle of the present invention;
FIG. 9 is a schematic view of an adjusting knob in the multi-needle injection needle of the present invention;
FIG. 10 is a schematic view showing the engagement between the stepped groove of the hub and the latch of the adjustment knob in the multi-needle syringe needle of the present invention;
FIG. 11 is a schematic view showing the engagement of the tooth surface of the hub and the projection of the adjusting knob in the multi-needle syringe needle of the present invention;
fig. 12 is a schematic view of the indicating arrow of the negative pressure seat and the scale of the adjusting knob in the multi-needle syringe needle of the present invention.
The reference numbers are as follows:
a needle outlet surface
1 needle stand
101 first needle tube mounting hole
102 pilot hole
103 regulating boss
104 step groove
105 first stop block
106 second stop block
107 tooth surface
2 shunting seat
3 negative pressure seat
301 diaphragm plate
302 second needle tube mounting hole
303 guide post
304 ring card slot
305 first buckle
306 negative pressure input port
307 basin-like structure
308 opening of the container
309 drainage column
310 indicates an arrow
4 conical seat
5 adjusting knob
501 center hole
502 second buckle
503 annular guide edge
504 latch
505 bump
506 scale
6 needle tube
7 needle adjusting spring
8 sealing rings.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in conjunction with the accompanying drawings to make it clear to those skilled in the art how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.
Referring to fig. 2 to 5, the multi-needle injection needle with the accurate calibration boss comprises a needle base 1, a negative pressure base 3, a conical base 4, an adjusting knob 5, a needle tube 6, a needle adjusting spring 7 and a sealing ring 8. The difference with the prior art is that a shunting seat is removed, a connecting and matching structure between the needle seat 1 and the negative pressure seat 3, a connecting and matching structure between the needle seat 1 and the adjusting knob 5, a connecting and matching structure between the negative pressure seat 3 and the adjusting knob 5, an inertia backflow prevention mechanism on the negative pressure seat 3 and a needle adjusting spring 7 are added, and the position of a negative pressure input port 306 of the negative pressure seat 3 is adjusted.
The components are explained in detail below.
Referring to fig. 4 to 6, a cavity and a plurality of first needle tube mounting holes 101 communicating with the bottom surface of the cavity are formed in the needle holder 1, and the needle holder 1 is mounted inside the negative pressure holder 3. The cavity bottom surface of needle file 1 is equipped with the first runner of connecting a plurality of first syringe mounting holes 101, and the department placed in the middle of the one end terminal surface of needle file 1 towards the inside negative pressure seat 3 is equipped with two or more guiding holes 102 to cooperate with two or more guide posts 303 of negative pressure seat 3, realize the accurate concentric axial motion between needle file 1 and the negative pressure seat 3, and then guarantee the precision of out needle length.
More than two adjusting bosses 103 extending along the circumferential direction are uniformly distributed on the outer side wall of the other end of the needle base 1 along the circumferential direction, a stepped groove 104 is formed in one end face, facing the inside of the negative pressure base 3, of each adjusting boss 103 along the extending direction to be matched with a latch 504 of the adjusting knob 5, see fig. 10, the needle adjusting target is achieved, and each stepped surface of the stepped groove 104 corresponds to one needle adjusting level. In this embodiment, the number of the first needle tube mounting holes 101 is 9 and is distributed in a 3 × 3 rectangular array, the number of the guiding holes 102 is 2 and is symmetrically distributed on the peripheral side of the middle first needle tube mounting hole 101, the number of the adjusting bosses 103 is 3, and the extending directions of the upper stepped grooves 104 are all arranged along the same circumferential direction of the needle base 1.
Furthermore, a tooth surface 107 is arranged on the side wall of each adjusting boss 103 along the extending direction to be matched with a protrusion 505 of the adjusting knob 5, see fig. 11, so that adjusting hand feeling when the adjusting knob 5 is rotated is generated, the position between the needle seat 1 and the adjusting knob 5 is positioned, when a tooth space of the tooth surface 107 is clamped with the protrusion 505 of the adjusting knob 5, a sound of being clamped in place is generated, and the tooth space of the tooth surface 107 and a step surface of the step groove 104 can be arranged in a one-to-one correspondence manner. One end of each stepped groove 104 corresponding to the lowest stepped surface is provided with a first stop block 105, the other end corresponding to the highest stepped surface is provided with a second stop block 106, and the first stop block 105 and the second stop block 106 are used for limiting the moving range of the latch 504 of the adjusting knob 5, namely limiting the needle adjusting range. The second stop block 106 is further provided with an inclined surface engaged with the highest step surface of the step groove 104, so that the latch 504 of the adjusting knob 5 is smoothly latched into the step groove 104 and enters the needle adjusting area during assembly, and the protrusion 505 of the adjusting knob 5 is latched into the tooth socket of the tooth surface 107.
Referring to fig. 4, 5, 7 and 8, the negative pressure seat 3 is sleeved outside the needle seat 1, one end face of the negative pressure seat 3 is a needle outlet face and is used for contacting with the skin, and the other end of the negative pressure seat 3 is used for placing the needle seat 1 and installing the adjusting knob 5. The negative pressure seat 3 is internally provided with a diaphragm plate 301 which divides the inner cavity into two parts, the diaphragm plate 301 is provided with a plurality of second needle tube mounting holes 302 corresponding to a plurality of first needle tube mounting holes 101 of the needle seat 1, and the center of the diaphragm plate 301 facing the surface of the needle seat 1 is provided with more than two guide posts 303 corresponding to more than two guide holes 102 of the needle seat 1, so as to realize the precise concentric axial movement between the negative pressure seat 3 and the needle seat 1. In this embodiment, the number of the guide posts 303 is 2 and symmetrically distributed around the middle second needle tube mounting hole 301.
The other end face of the negative pressure seat 3 is provided with an inward concave annular clamping groove 304 to match with an annular guide edge 503 of the adjusting knob 5, so that the axial tight connection between the negative pressure seat 3 and the adjusting knob 5 is realized, and the relative rotation between the negative pressure seat 3 and the adjusting knob 5 is allowed. The ring-shaped clamping groove 304 is internally provided with first buckles 305 distributed or extended along the circumferential direction to match with the second buckles 502 of the adjusting knob 5 to realize axial clamping between the negative pressure seat 3 and the adjusting knob 5, the first buckles 305 can be arranged on the side wall and/or the bottom surface of the ring-shaped clamping groove 304, and in this embodiment, the first buckles 305 are distributed on the outer ring side wall of the ring-shaped clamping groove 304 along the circumferential direction.
The side wall of the inner cavity part of the negative pressure seat 3, which contains the needle seat 1 and is matched with the needle seat 1, is provided with a negative pressure input port 306 for externally connecting a suction device, the outer side wall of the needle seat 1 is provided with a sealing ring groove and is embedded with a sealing ring 8, the sealing ring 8 is used for sealing between the outer side wall of the needle seat 1 and the inner side wall of the negative pressure seat 3, and the sealing ring 8 is preferably a corrosion-resistant sealing ring. By adjusting the position of the negative pressure input port 306 and adding the sealing ring 8, the needle seat 1 and the negative pressure seat 3 are tightly matched in the negative pressure process of sucking up the skin by the multi-needle injection needle head, and the skin can not be separated because of the pulling of an operator.
Still be equipped with the inertia anti-reflux mechanism who is used for avoiding the weeping to be inhaled back to the negative pressure pipe on the cross slab 301 of negative pressure seat 3, inertia anti-reflux mechanism includes basin column structure 307, opening 308, drainage post 309, the quantity of basin column structure 307 is more than one, every basin column structure 307 sets up on cross slab 301 and for the surface protrusion towards needle file 1 of cross slab 301, the surface indent of needle file 1 dorsad, be equipped with more than two non-openings 308 towards negative pressure input port 306 along circumference on the lateral wall of basin column structure 307, be equipped with the drainage post 309 that sets up along the axis in the basin column structure 307. By adjusting the position of the negative pressure input port 306 and adding the inertia backflow prevention mechanism, possible leakage liquid in the injection process of the multi-needle injection needle head is prevented from entering the external negative pressure pipe through the negative pressure input port 306. In this embodiment, the number of the basin-shaped structures 307 is 2, and the basin-shaped structures are symmetrically distributed on the periphery of the middle second needle tube mounting hole 301, and the 2 basin-shaped structures 307 and the 2 guide posts are distributed in a 2 × 2 rectangular array shape as a whole.
Referring to fig. 4 and 5, the conical seat 4 passes through the central hole 501 of the adjusting knob and one end of the conical seat 4 extends into the cavity of the needle holder 1, and one end of the conical seat 4 is connected with the cavity of the needle holder 1 through a sealant. A shunting cavity is formed between the end face of one end of the conical seat 4 and the bottom surface of the concave cavity of the needle seat 1, and a second flow passage corresponding to the first flow passage of the needle seat 1 is arranged on the end face of one end of the conical seat 4. A channel communicated with the flow dividing cavity is arranged on the conical seat 4 along the axis, and one end of the channel is connected with the second flow channel.
Referring to fig. 4, 5, and 9, the adjusting knob 5 is in a cover shape and is installed at the other end of the negative pressure seat 3, and a central hole 501 for the conical seat 4 to pass through is formed in the adjusting knob 5. The lateral wall of the adjusting knob 5 is provided with second buckles 502 distributed or extended along the circumferential direction to cooperate with the first buckles 305 of the negative pressure seat to realize the axial clamping between the adjusting knob 5 and the negative pressure seat 3, the second buckles 502 can be arranged on the inner lateral wall and/or the outer lateral wall of the adjusting knob 5, and in this embodiment, the second buckles 502 are arranged on the outer lateral wall of the adjusting knob 5 along the circumferential direction. The end surface of the opening 308 of the adjusting knob 5 is provided with an annular guide edge 503 to match with the annular clamping groove 304 of the negative pressure seat 3, so as to realize the axial tight connection between the negative pressure seat 3 and the adjusting knob 5, and simultaneously allow the adjusting knob 5 to rotate relative to the negative pressure seat 3 by taking the conical seat 4 as a central axis. More than two latch teeth 504 are uniformly distributed on the inner side wall of the adjusting knob 5 along the circumferential direction to be matched with the stepped groove 104 on the adjusting boss 103 of the needle seat 1, see fig. 10, so as to realize the needle adjusting target. More than two protrusions 505 are uniformly distributed on the inner side wall of the adjusting knob 5 along the circumferential direction to be matched with the tooth surface 107 on the adjusting boss 103 of the needle seat 1, see fig. 11, so that the adjusting hand feeling when the adjusting knob 5 is rotated is realized. In this embodiment, the number of the latches 504 and the protrusions 505 is 3.
Referring to fig. 4 and 5, each needle tube 6 of the plurality of needle tubes 6 is fixed in a first needle tube mounting hole 101 of the needle base 1 by dispensing and is arranged in a second needle tube mounting hole 302 of the corresponding vacuum base 3 in a penetrating manner.
Referring to fig. 4 and 5, the needle adjusting spring 7 is sleeved on the conical seat 4, two ends of the needle adjusting spring are respectively abutted against one end of the conical seat 4 and the inner bottom surface of the adjusting knob 5, and the needle adjusting spring 7 is always in a compressed state. The needle adjusting spring 7 ensures the location between the stepped groove 104 of the needle stand 1 and the latch 504 of the adjusting knob 5 during needle adjustment, and also adjusts the hand feeling for operating the adjusting knob.
In addition, in this embodiment, the stepped groove 104 on each adjusting boss 103 of the needle holder 1 has 33 stepped surfaces, except the back 0 surface, the interval between other stepped surfaces is 0.02mm, after the needle adjusting length is calibrated after production, five-stage needle discharging lengths are generated, and each stage of needle discharging length corresponds to a stepped surface of a certain stage, that is, corresponds to a needle adjusting level of a certain stage. The first-stage needle discharging length enables the needle tip of the needle tube 6 to be completely retracted inside the multi-needle injection needle head, the second-stage needle discharging length enables the needle tip of the needle tube 6 to slightly extend out of the needle discharging surface of the negative pressure seat 3, and the third-stage needle discharging length to the fifth-stage needle discharging length correspond to different injection depths and need to be adjusted according to different injection conditions. The error range of the length of each needle is within +/-0.05 mm. The outer side walls of the negative pressure seat 3 and the adjusting knob 5 are further provided with an indicating arrow 310 and a scale 506 respectively, see fig. 12, the scale 506 marks the needle withdrawing length output by the final needle adjustment, and the needle withdrawing length can be accurately marked through the indicating arrow 310 and the scale 506.
When the length of the needle to be drawn needs to be adjusted, the adjusting knob 5 can be directly rotated to enable the latch 504 of the adjusting knob 5 to move along the stepped groove 104 on the adjusting boss 103 of the needle base 1, and the adjusting knob 5 can drive the negative pressure base 3 to axially move relative to the needle base 1, so that the axial relative position between the needle drawing surface of the negative pressure base 3 and the needle tube 6 on the needle base 1 changes. Meanwhile, the bulge 505 of the adjusting knob 5 moves along the tooth surface 107 on the adjusting boss 103 of the needle seat 1, so that the adjusting hand feeling when the adjusting knob 5 is rotated is generated, and the sound of clamping in place is generated every time the bulge 505 of the adjusting knob 5 is clamped into one tooth groove of the tooth surface 107. When the position of the scale 506 required on the adjusting knob 5 is aligned with the indication arrow 310 on the negative pressure seat 3, the latch 504 of the adjusting knob 5 is clamped on the corresponding step surface of the step groove 104, and the protrusion 505 of the adjusting knob 5 is clamped in the corresponding tooth groove of the tooth surface 107, so that the adjustment of the length of the needle is completed, and the purpose of controlling the length of the needle with high precision is realized.
Because during the in-service use, awl seat 4 fixed mounting is in the front end of cylinder, and through sealed glue connection between awl seat 4 and the needle file 1, the in-process of rotatory adjust knob 5, the position of needle file 1 can remain motionless, and transfer needle spring 7 is in compression state all the time and pushes up between the one end of awl seat 4 and adjust knob 5, the elastic restoring force of transfer needle spring 7 makes the ladder face in close contact with of latch 504 of adjust knob 5 and the ladder groove 104 of needle file 1, thereby has guaranteed the regulation of rotatory adjust knob 5 and has felt.
In addition, the adjusting knob 5 can be pressed before being rotated, so that the needle adjusting spring 7 is compressed, the latch 504 of the adjusting knob 5 is separated from the stepped surface of the stepped groove 104 on the adjusting boss 103 of the needle seat 1, and then the subsequent rotating operation is carried out. When the needle is rotated in place, the adjusting knob 5 is loosened, and under the action of the elastic restoring force of the needle adjusting spring 7, the latch 504 of the adjusting knob 5 can be clamped on the corresponding step surface of the step groove 104, so that the needle outlet length adjustment can be completed.
It should be noted that many variations and modifications of the embodiments of the present invention fully described are possible and are not to be considered as limited to the specific examples of the above embodiments. The above examples are given by way of illustration of the invention and are not intended to limit the invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.
Claims (10)
1. A multi-needle injection needle with a boss accurately calibrated comprises a needle seat, a negative pressure seat, a conical seat, an adjusting knob and a needle tube, wherein the needle seat is arranged in the negative pressure seat, one end face of the negative pressure seat is a needle outlet face, the other end of the negative pressure seat is used for placing the needle seat, the adjusting knob is arranged on the other end of the negative pressure seat, a transverse partition plate for dividing an inner cavity into two parts is arranged in the negative pressure seat, the conical seat penetrates through the adjusting knob, one end of the conical seat is connected with the needle seat through a sealant, the needle tube is fixed on the needle seat, the multi,
the needle adjusting spring is arranged on the conical seat, two ends of the needle adjusting spring are respectively arranged on one end of the conical seat and the inner bottom surface of the adjusting knob, and the needle adjusting spring is in a compressed state;
more than two adjusting bosses extending along the circumferential direction are uniformly distributed on the outer side wall of the needle base along the circumferential direction, a stepped groove is formed in the end face of each adjusting boss along the extending direction, tooth surfaces are formed on the side wall along the extending direction, more than two clamping teeth matched with the stepped grooves of the adjusting bosses and more than two protrusions matched with the tooth surfaces of the adjusting bosses are uniformly distributed on the inner side wall of the adjusting knob along the circumferential direction;
a negative pressure input port is arranged on the side wall of the inner cavity part of the needle seat of the negative pressure seat, and an inertia backflow preventing mechanism is arranged on a diaphragm plate of the negative pressure seat;
the adjusting knob is rotated to enable the clamping teeth of the adjusting knob to move along the stepped groove on the adjusting boss of the needle base, then the adjusting knob drives the negative pressure base to axially move relative to the needle base, the axial relative position between the needle outlet surface of the negative pressure base and the needle tube on the needle base is changed to control the needle outlet length, meanwhile, the protrusion of the adjusting knob moves along the tooth surface on the adjusting boss of the needle base, and adjustment hand feeling and positioning between the adjusting knob and the needle base are achieved.
2. The multi-needle injection needle of claim 1, wherein the needle seat and the negative pressure seat are respectively provided with a guide hole and a guide post which are axially guided and matched.
3. The multi-needle syringe needle of the precise calibration boss type according to claim 1, wherein one end of each stepped groove of the needle holder corresponding to the lowest stepped surface is provided with a first stopper, and the other end corresponding to the highest stepped surface is provided with a second stopper.
4. The multi-needle syringe needle of claim 3, wherein the second stopper has a slope surface engaging with the highest step surface.
5. The precision calibration boss based multi-needle injection needle of claim 1 wherein at least one step surface of each step groove of said needle mount corresponds to a step needle exit length.
6. The multi-needle injection needle head with the accurate calibration boss type according to claim 1, wherein an annular groove is arranged on the other end face of the negative pressure seat, an annular guide edge is arranged on the opening end face of the adjusting knob, and the negative pressure seat and the adjusting knob are in tight axial connection and can rotate relatively through the cooperation of the annular groove and the annular guide edge.
7. The multi-needle injection needle head with the accurate calibration boss type according to claim 1, wherein a first buckle is arranged on the side wall of the other end of the negative pressure seat, a second buckle is arranged on the side wall of the adjusting knob, and the negative pressure seat and the adjusting knob are matched to realize axial clamping through the first buckle and the second buckle.
8. The multi-needle syringe needle of the precise calibration boss type according to claim 1, wherein the inertia backflow prevention mechanism on the diaphragm plate of the negative pressure seat comprises a basin-shaped structure, an opening and a drainage column, the basin-shaped structure is arranged on the diaphragm plate and protrudes relative to the surface of the diaphragm plate facing the needle seat and is concave back to the surface of the needle seat, more than two openings which are not facing the negative pressure input port are arranged on the side wall of the basin-shaped structure along the circumferential direction, and the drainage column arranged along the axis is arranged in the basin-shaped structure.
9. The multi-needle injection needle of claim 1, wherein the outer side walls of the negative pressure seat and the adjusting knob are respectively provided with an indicating arrow and a scale.
10. The multi-needle injection needle with the accurate calibration boss according to any one of claims 1 to 9, wherein a cavity for placing one end of the conical seat and a plurality of first needle tube mounting holes communicated with the bottom surface of the cavity are formed in the needle seat, a shunt cavity is formed between the bottom surface of the cavity of the needle seat and one end surface of the conical seat, a first flow channel for connecting the first needle tube mounting holes is formed in the bottom surface of the cavity of the needle seat, a plurality of second needle tube mounting holes corresponding to the first needle tube mounting holes are formed in the negative pressure seat, a channel communicated with the shunt cavity is formed in the conical seat, a second flow channel connected with the channel and corresponding to the first flow channel is formed in one end surface of the conical seat, and a plurality of needle tubes are fixed in the first needle tube mounting holes and penetrate through the second needle tube mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154460.XA CN112755338A (en) | 2021-02-04 | 2021-02-04 | Accurate many needles syringe needle of calibration boss formula |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154460.XA CN112755338A (en) | 2021-02-04 | 2021-02-04 | Accurate many needles syringe needle of calibration boss formula |
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| Publication Number | Publication Date |
|---|---|
| CN112755338A true CN112755338A (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110154460.XA Pending CN112755338A (en) | 2021-02-04 | 2021-02-04 | Accurate many needles syringe needle of calibration boss formula |
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| CN (1) | CN112755338A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115245609A (en) * | 2021-07-27 | 2022-10-28 | 苏州瀚诺馨生物科技有限公司 | Disposable aseptic syringe needle |
-
2021
- 2021-02-04 CN CN202110154460.XA patent/CN112755338A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115245609A (en) * | 2021-07-27 | 2022-10-28 | 苏州瀚诺馨生物科技有限公司 | Disposable aseptic syringe needle |
| CN115245609B (en) * | 2021-07-27 | 2023-09-08 | 苏州瀚诺馨生物科技有限公司 | Disposable sterile injection needle |
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Effective date of registration: 20210603 Address after: 519080 room 805-806, building 2, No.65 Kechuang East Road, Tangjiawan Town, high tech Zone, Zhuhai City, Guangdong Province Applicant after: Aimechuang medical technology (Zhuhai) Co.,Ltd. Address before: 519080 unit 1107, building 1, Tsinghua Science Park, 101 Daxue Road, Tangjiawan Town, high tech Zone, Zhuhai City, Guangdong Province Applicant before: Enoch medical technology (Zhuhai) Co.,Ltd. |