CN215194559U

CN215194559U - Multi-needle injection needle head capable of controlling needle outlet length with high precision

Info

Publication number: CN215194559U
Application number: CN202023096051.9U
Authority: CN
Inventors: 罗清; 张建军
Original assignee: Aimechuang Medical Technology Zhuhai Co ltd
Current assignee: Aimechuang Medical Technology Zhuhai Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-12-17
Anticipated expiration: 2030-12-21

Abstract

The multi-needle injection needle head capable of controlling the needle outlet length in a high-precision mode comprises a needle seat, a flow dividing seat, a negative pressure seat, a conical seat, an adjusting knob and a needle tube, wherein a plastic spring which is propped against the inside of the negative pressure seat is arranged on the needle seat, a boss is circumferentially arranged on the side wall of one end of the conical seat, and more than two stepped grooves are circumferentially and uniformly distributed in the boss; the needle pushing device is characterized by further comprising a cam, the cam is sleeved on the conical seat, more than two shifting teeth which correspond to and are matched with the stepped grooves are arranged on the cam, the other end of the cam is connected with an adjusting knob in a spline mode, when the adjusting knob is rotated, the adjusting knob drives the cam to rotate synchronously, the shifting teeth on the cam shift the stepped grooves on the conical seat, and the conical seat moves axially to control the length of a needle. The technical scheme realizes high-precision control of the needle outlet length and high-precision positioning between the conical seat and the cam, and the plastic spring not only ensures the positioning between the conical seat and the cam, but also adjusts the hand feeling of the rotary adjusting knob; the needle seat and the negative pressure seat are in guiding fit with the guide post through the guide hole, and the precision of the length of the needle is ensured.

Description

Multi-needle injection needle head capable of controlling needle outlet length with high precision

Technical Field

The utility model belongs to the technical field of the syringe, concretely relates to many needles syringe needle of high accuracy control length of withdrawing a needle.

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.

SUMMERY OF THE UTILITY MODEL

To the above problems, the present invention provides a multi-needle syringe needle with high precision needle-out length control.

The purpose of the utility model can be realized by the following technical scheme:

a multi-needle injection needle head capable of controlling the needle outlet length in a high-precision mode comprises a needle seat, a shunting seat, a negative pressure seat, a conical seat, an adjusting knob and a needle tube, wherein a plastic spring is arranged on one end face of the needle seat facing the inside of the negative pressure seat, the plastic spring is propped against the inside of the negative pressure seat and provides elastic restoring force facing the needle outlet face of the negative pressure seat, a boss is arranged on the side wall of one end of the conical seat in the circumferential direction, and more than two stepped grooves are uniformly distributed in the circumferential direction on the end face, opposite to the needle outlet face of the negative pressure seat, of the boss; still include the cam, the cam suit is on the awl seat, and the one end terminal surface of cam and the boss terminal surface cooperation of awl seat and its it has more than two and the ladder groove corresponds and the complex tooth of dialling along the circumference equipartition, the other end and the adjust knob splined connection of cam, and during rotatory adjust knob, adjust knob drives the cam and rotates in step, and the ladder groove on the awl seat is stirred to the tooth of dialling on the cam, makes awl seat axial displacement come control out needle length.

Furthermore, the plastic spring is in an elastic arm shape, one end of the plastic spring is connected with one end face of the needle seat, and the other end of the plastic spring is propped against the inside of the negative pressure seat. Furthermore, the number of the plastic springs is multiple, and the plastic springs are uniformly distributed on the end face of one end of the needle seat along the circumferential direction and are arranged along the same circumferential direction.

Furthermore, all the stepped grooves are sequentially connected end to end along the same direction of the circumferential direction of the bosses to form a circle.

Further, each grade ladder face in the ladder groove is the inclined plane, the top surface of dialling the tooth is the inclined plane and closely laminates on corresponding any grade ladder face in ladder groove.

Furthermore, the outer wall of the other end of the cam and the inner wall of the central hole of the adjusting knob are respectively provided with an external spline and an internal spline.

Furthermore, a plurality of guide holes and a plurality of guide columns are correspondingly arranged in the needle seat and the negative pressure seat respectively, the guide holes and the guide columns are arranged along the axial direction, and the needle seat and the negative pressure seat are in guide fit through the guide holes and the guide columns.

Furthermore, the device also comprises a cam cover plate, wherein the cam cover plate is arranged at the other end of the negative pressure seat and sleeved on the cam, and the cam cover plate is positioned in the adjusting knob. Furthermore, be equipped with a plurality of cantilever buckles that extend along the axial and a plurality of guide arm that extend along the axial on the other end terminal surface of negative pressure seat, be equipped with a plurality of buckle slots that correspond with the cantilever buckle and a plurality of guide slot that correspond with the guide arm on the cam closing cap board, the inside of cam closing cap board still is equipped with a plurality of backstop arms that correspond with a plurality of buckle slots, and the cam closing cap board is blocked by the backstop arm after inserting the buckle slot through the cantilever buckle, and the guide arm inserts the guide slot and installs in the other end of negative pressure seat.

Further, be equipped with a plurality of first syringe mounting holes of cavity and intercommunication cavity bottom surface on the needle file, reposition of redundant personnel seat is installed in the cavity of needle file and is supported by the one end that stretches into the awl seat in the cavity, is equipped with a plurality of second syringe mounting holes that correspond with a plurality of first syringe mounting holes on the reposition of redundant personnel seat, constitutes the reposition of redundant personnel chamber between reposition of redundant personnel seat and the awl seat, constitutes adjustment and encapsulating chamber between the cavity of reposition of redundant personnel seat and needle file, the negative pressure seat suit is outside the needle file, is equipped with a plurality of third syringe mounting holes that correspond with a plurality of first syringe mounting holes on the negative pressure seat, the awl seat passes adjust knob's centre bore, is equipped with the passageway that communicates with reposition of redundant personnel chamber on the awl seat, many every syringe of redundant personnel is fixed in first syringe mounting hole and second syringe mounting hole to wear to locate in the third syringe mounting hole.

Compared with the prior art, the beneficial effects of the utility model are that: the needle drawing length adjusting device is characterized in that a cam with a drawing tooth is additionally arranged, the drawing tooth of the cam is matched with a stepped groove formed in a conical seat, when a rotary adjusting knob drives the cam to rotate synchronously, the drawing tooth draws the stepped groove to enable the conical seat to move axially so as to drive a shunt seat, a needle seat and a needle tube to move axially, when the drawing tooth is clamped on a stepped surface of the stepped groove with a target needle drawing length, the needle drawing length adjustment is completed, the error range of the needle drawing length corresponding to each stepped surface of the stepped groove is within 0.05mm, and therefore the needle drawing length and the high-precision positioning between the conical seat and the cam are controlled in a high-precision mode; the needle base is provided with a plastic spring which is always pressed against the inside of the negative pressure base so as to ensure the positioning between the conical base and the cam after the adjusting knob is rotated and adjust the hand feeling of the rotating adjusting knob; the needle seat and the negative pressure seat are in guiding fit through the guide hole and the guide column, the mutual movement is guaranteed to be coaxial, the precision of the length of the needle is guaranteed, and accurate calibration is easily achieved.

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 structure of the multi-needle syringe needle of the present invention;

FIG. 3 is an exploded view of the multi-needle syringe needle of the present invention;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 2;

fig. 5 is a schematic structural view of the needle holder of the present invention;

fig. 6 is an assembly diagram of the conical seat and the cam according to the present invention;

fig. 7 is a schematic structural view of the guide hole of the needle seat and the guide post of the negative pressure seat in the present invention.

The reference numbers are as follows:

a needle outlet surface

1 needle stand

101 plastic spring

102 pilot hole

2 shunting seat

3 negative pressure seat

301 cantilever fastener

302 guide arm

303 guide post

4 conical seat

401 boss

402 step groove

5 adjusting knob

6 needle tube

7 cam

701 Shifting gear

702 external spline

8 cam cover sealing plate

The arm is stopped 801.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings to make it clear to those skilled in the art how to practice the invention. While the invention has been described in connection with its preferred embodiments, these embodiments are intended to be illustrative, and not to limit the scope of the invention.

Referring to fig. 2 to 4, the multi-needle injection needle with high-precision needle discharging length control comprises a needle base 1, a shunt base 2, a negative pressure base 3, a conical base 4, an adjusting knob 5, a needle tube 6, a cam 7 and a cam sealing cover plate 8. The difference from the prior art is mainly that a connecting and matching structure between the cam 7 and the cam cover sealing plate 8 and between the conical seat 4 and the cam 7 is added.

The components are explained in detail below.

The needle base 1 is provided with a cavity and a plurality of first needle tube mounting holes communicated with the bottom surface of the cavity. Wherein, referring to fig. 5, a plurality of plastic springs 101 are uniformly distributed on the end surface of the needle base 1 facing the inside of the negative pressure base 3 along the circumferential direction, each plastic spring 101 is in the shape of an elastic arm, one end of each plastic spring is connected with the end surface of the needle base 1, the other end of each plastic spring is supported inside the negative pressure base 3, the plastic springs 101 provide the elastic restoring force facing the needle outlet surface for the negative pressure base 3, and all the plastic springs 101 shown in the figure are arranged along the same circumferential direction of the negative pressure base 3. The plastic spring 101 is used for positioning the rear conical seat 4 of the rotary adjusting knob 5 and the cam 7, and also adjusting the hand feeling of the rotary adjusting knob 5.

Shunt seat 2 is installed in the cavity of needle file 1 and is supported by the one end that stretches into awl seat 4 in the cavity, constitute the reposition of redundant personnel chamber between shunt seat 2 and the awl seat 4, and be equipped with first runner and second runner on the looks proximal surface of shunt seat 2 and awl seat 4 respectively correspondingly, be equipped with a plurality of second needle tubing mounting holes that correspond with a plurality of first needle tubing mounting holes on the shunt seat 2, the one end and the first runner of a plurality of second needle tubing mounting holes are connected, constitute the adjustment and irritate gluey chamber between the cavity of shunt seat 2 and needle file 1.

The suit of negative pressure seat 3 is outside needle file 1, the one end terminal surface of negative pressure seat 3 is a play needle face, negative pressure seat 3 be close to one end department and be equipped with a plurality of third syringe mounting holes that correspond with a plurality of first syringe mounting holes, there are a plurality of cantilever buckles 301 along axial extension on the other end terminal surface of negative pressure seat 3 along the circumference equipartition, cantilever buckle 301 is used for installing cam closing cap board 8, it has a plurality of guide arms 302 along axial extension still to have along the circumference equipartition on the other end terminal surface of negative pressure seat 3, guide arm 302 is used for the direction when installing cam closing cap board 8.

The conical seat 4 is provided with a channel communicated with the flow dividing cavity, and one end of the channel is connected with the second flow channel. Referring to fig. 6, a boss 401 is circumferentially disposed on a side wall of one end of the conical seat 4, two or more stepped grooves 402 are circumferentially and uniformly formed in an end surface of the boss 401, which faces away from the needle outlet surface of the negative pressure seat 3, each stepped surface of the stepped grooves 402 is an inclined surface, extending directions of all the stepped grooves 402 are circumferentially disposed in the same direction of the boss 401, and all the stepped grooves 402 are sequentially connected end to end in the same direction of the boss 401 to form a circle as shown in the drawing.

Referring to fig. 6, the cam 7 is sleeved on the conical seat 4, more than two raised shifting teeth 701 are uniformly distributed on an end face of one end of the cam 7 along the circumferential direction, the more than two raised shifting teeth 701 correspond to more than two stepped grooves 402 of the conical seat 4 respectively, the top surface of each shifting tooth 701 is an inclined surface and is tightly attached to any one stepped surface of the corresponding stepped groove 402, and the matching between the shifting teeth 701 and the stepped grooves 402 is realized. The outer wall of the other end of the cam 7 is provided with an external spline 702.

Referring to fig. 3 and 4, the cam cover plate 8 is sleeved on the cam 7, a plurality of fastening slots uniformly distributed along the circumferential direction and a plurality of guiding slots uniformly distributed along the circumferential direction are arranged on the cam cover plate 8, the fastening slots respectively correspond to the cantilever fastening 301 of the negative pressure seat 3, a plurality of stopping arms 801 corresponding to the fastening slots are arranged inside the cam cover plate 8, and the guiding slots respectively correspond to the guiding arms 302 of the negative pressure seat 3. The cam cover sealing plate 8 is blocked by the stopping arm 801 after being inserted into the buckle slot through the cantilever buckle 301, the guide arm 302 is inserted into the guide slot and is arranged at the other end of the negative pressure seat 3, and the cam cover sealing plate 8 covers the connecting and matching part of the conical seat 4 and the cam 7 to play a role in blocking.

The adjusting knob 5 is installed on the conical seat 4, the other end of the negative pressure seat 3, the cam 7 and the cam sealing cover plate 8 are sleeved, an inner spline matched with an outer spline 702 of the cam 7 is arranged in a center hole of the adjusting knob 5, and the inner side wall of the adjusting knob 5 is tightly attached to the outer side wall of the cam sealing cover plate 8.

Each needle tube 6 is fixed in a first needle tube mounting hole of the needle base 1 and a second needle tube mounting hole of the shunt base 2 through dispensing, and penetrates through a third needle tube mounting hole of the corresponding negative pressure base 3.

In this embodiment, each stepped groove 402 on the conical seat 4 has 5 stepped surfaces corresponding to 5 needle-out lengths, the needle-out length corresponding to the first stepped surface makes the needle tip of the needle tube 6 completely retract inside the multi-needle injection needle, the needle-out length corresponding to the second stepped surface makes the needle tip of the needle tube 6 slightly extend out of the needle-out surface of the negative pressure seat 3, and the needle-out lengths corresponding to the third to fifth stepped surfaces 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 wall of the negative pressure seat 3 is also provided with scales (not shown in the figure) convenient to identify, and the scales mark the needle outlet lengths corresponding to all levels of stepped surfaces of the stepped groove 402, so that the needle outlet lengths can be conveniently and accurately calibrated.

Referring to fig. 7, a plurality of guide holes 102 and a plurality of guide posts 303 are correspondingly arranged in the needle base 1 and the negative pressure base 3 respectively, the guide holes 102 and the guide posts 303 are arranged along the axial direction, and the needle base 1 and the negative pressure base 3 are in guide fit through the guide holes 102 and the guide posts 303, so that the mutual movement between the needle base 1 and the negative pressure base 3 is coaxial, and the precision of the needle outlet length is further ensured.

When the length of the needle needs to be adjusted, the adjusting knob 5 is rotated, the adjusting knob 5 drives the cam 7 to synchronously rotate, the shifting teeth 701 on the cam 7 shift the stepped grooves 402 matched with the conical seats 4, so that the conical seats 4 move in the axial direction, and further the shunting seats 2, the needle seats 1 and the needle tubes 6 are driven to axially move, when the shifting teeth 701 are clamped on the stepped surfaces of the stepped grooves 402 of the target length of the needle, the adjustment of the length of the needle is completed, and the purpose of controlling the length of the needle with high precision is achieved. The plastic spring 101 on the needle stand 1 is always propped against the inside of the negative pressure seat 3, so that the positioning between the conical seat 4 and the cam 7 after the adjusting knob 5 is rotated is ensured, and the hand feeling of the adjusting knob 5 is also adjusted.

It should be noted that many variations and modifications of the embodiments of the present invention are possible, which are fully described, and are not limited to the specific examples of the above embodiments. The above embodiments are merely illustrative of the present invention and are not intended to limit the present 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

1. The multi-needle injection needle with the needle outlet length controlled at high precision comprises a needle seat, a shunt seat, a negative pressure seat, a conical seat, an adjusting knob and a needle tube, and is characterized in that a plastic spring is arranged on one end face of the needle seat facing the inside of the negative pressure seat, the plastic spring is propped against the inside of the negative pressure seat and provides elastic restoring force facing the needle outlet face of the negative pressure seat, a boss is arranged on the side wall of one end of the conical seat along the circumferential direction, and more than two stepped grooves are uniformly distributed on the end face of the boss facing away from the needle outlet face of the negative pressure seat along the circumferential direction;

still include the cam, the cam suit is on the awl seat, and the one end terminal surface of cam and the boss terminal surface cooperation of awl seat and its it has more than two and the ladder groove corresponds and the complex tooth of dialling along the circumference equipartition, the other end and the adjust knob splined connection of cam, and during rotatory adjust knob, adjust knob drives the cam and rotates in step, and the ladder groove on the awl seat is stirred to the tooth of dialling on the cam, makes awl seat axial displacement come control out needle length.

2. The multi-needle syringe needle with high precision needle discharging length controlled according to claim 1, wherein the plastic spring is in the shape of an elastic arm, one end of the plastic spring is connected with one end face of the needle seat, and the other end of the plastic spring is pressed against the inside of the negative pressure seat.

3. The multi-needle syringe needle with high-precision needle discharging length control according to claim 2, wherein the number of the plastic springs is multiple, and the multiple plastic springs are uniformly distributed on the end face of one end of the needle seat along the circumferential direction and are arranged along the same circumferential direction.

4. The multi-needle syringe needle with high precision needle discharging length controlled according to claim 1, wherein all the stepped grooves are sequentially connected end to end along the same direction of the circumferential direction of the boss to form a circle.

5. The multi-needle syringe needle with high precision in controlling the length of the needle outlet according to claim 1, wherein each step surface of the step groove is an inclined surface, and the top surface of the dial tooth is an inclined surface and is closely attached to any step surface of the corresponding step groove.

6. The multi-needle syringe needle with high precision in controlling the length of the discharged needle according to claim 1, wherein the outer wall of the other end of the cam and the inner wall of the central hole of the adjusting knob are respectively provided with an external spline and an internal spline.

7. The multi-needle syringe needle with high precision needle discharging length controlled according to claim 1 is characterized in that a plurality of guide holes and a plurality of guide posts are respectively and correspondingly arranged in the needle seat and the negative pressure seat, the guide holes and the guide posts are arranged along the axial direction, and the needle seat and the negative pressure seat are in guiding fit through the guide holes and the guide posts.

8. The multi-needle injection needle head capable of controlling the needle discharging length with high precision according to any one of claims 1 to 7, characterized by further comprising a cam cover plate, wherein the cam cover plate is installed at the other end of the negative pressure seat and sleeved on the cam, and the cam cover plate is located in the adjusting knob.

9. The multi-needle syringe needle with high needle discharging precision according to claim 8, wherein a plurality of cantilever buckles extending in the axial direction and a plurality of guide arms extending in the axial direction are provided on the other end face of the negative pressure seat, a plurality of buckle slots corresponding to the cantilever buckles and a plurality of guide slots corresponding to the guide arms are provided on the cam cover plate, a plurality of stopper arms corresponding to the plurality of buckle slots are further provided inside the cam cover plate, the cam cover plate is blocked by the stopper arms after being inserted into the buckle slots through the cantilever buckles, and the guide arms are inserted into the guide slots and mounted on the other end of the negative pressure seat.

10. The multi-needle injection needle with high precision needle discharge length control according to any one of claims 1 to 7 and 9, wherein the needle holder is provided with a cavity and a plurality of first needle tube mounting holes communicating with the bottom surface of the cavity, the shunt base is mounted in the cavity of the needle holder and is abutted by one end of a conical base extending into the cavity, the shunt base is provided with a plurality of second needle tube mounting holes corresponding to the plurality of first needle tube mounting holes, a shunt cavity is formed between the shunt base and the conical base, an adjusting and glue filling cavity is formed between the shunt base and the cavity of the needle holder, the negative pressure base is sleeved outside the needle holder, the negative pressure base is provided with a plurality of third needle tube mounting holes corresponding to the plurality of first needle tube mounting holes, the conical base passes through the center hole of the adjusting knob, the conical base is provided with a channel communicating with the shunt cavity, each needle tube of the plurality of needle tubes is fixed in the first needle tube mounting holes and the second needle tube mounting holes, and is arranged in the third needle tube mounting hole in a penetrating way.