CN113146522B - Needle making tool - Google Patents
Needle making tool Download PDFInfo
- Publication number
- CN113146522B CN113146522B CN202110555901.7A CN202110555901A CN113146522B CN 113146522 B CN113146522 B CN 113146522B CN 202110555901 A CN202110555901 A CN 202110555901A CN 113146522 B CN113146522 B CN 113146522B
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- needle
- fixing pin
- screw
- wall
- cylinder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention belongs to the field of assembly of medical pen type syringe needles, and provides an upper needle fixture which comprises a needle seat fixing pin with an opening at the upper end and used for fixing a needle seat, wherein the needle seat is sleeved at the upper end of the outer side wall of the needle seat fixing pin, the outer diameter of the upper end of the outer side wall of the needle seat fixing pin is smaller than the inner diameter of an inner cavity of the needle seat, the lower end of the outer side wall of the needle seat fixing pin is arranged on a fixture bar, a needle fixing pin with a cylinder structure is arranged in the inner cavity of the needle seat fixing pin, a positioning groove is arranged at the center of the upper end of the needle fixing pin, and the bottom of the needle fixing pin is connected with a limiting piece and used for preventing the needle fixing pin from falling off from the inner cavity of the needle seat fixing pin.
Description
Technical Field
The invention relates to the field of assembly of medical pen type syringe needles, in particular to a needle feeding tool.
Background
When the pen-type injector needle is used, the needle seat needs to be screwed on the injection pen, so that the needle tube penetrates through the rubber diaphragm to form the injector, if the concentricity of the needle tube and the needle seat is poor, the needle tube is broken or even broken in the screwing process, therefore, the concentricity requirement of the needle tube and the needle seat is very high, the needle tube and the needle seat are adhered together at the needle seat hole by using an adhesive, if the concentricity of the needle tube and the needle seat is not controlled, the problems of skew and non-uniform needle feeding height occur, and in addition, the limiting piece for fixing the needle fixing pin at the lower end of the needle tube is easy to fall off after a period of use.
Disclosure of Invention
The invention aims to provide an upper needle tool which has a simple structure and is easy to operate, and the upper needle of the pen-type injector needle head is inclined, the upper needle height and the limiting piece are not easy to fall off.
The technical scheme of the invention is that the upper needle fixture comprises a needle seat fixing pin with an opening at the upper end, a through hole for allowing a needle tube to pass through is formed in a central shaft of the needle seat and penetrates through a top cover of the needle seat, the needle seat is sleeved at the upper end of the outer side wall of the needle seat fixing pin, the outer diameter size of the upper end of the outer side wall of the needle seat fixing pin is smaller than the inner diameter of an inner cavity of the needle seat, the lower end of the outer side wall of the needle seat fixing pin is mounted on a tool bar and matched with a single station in the tool bar, a needle fixing pin with a cylinder structure is arranged in the inner cavity of the needle seat fixing pin, the mounting positions of the needle fixing pin and the inner cavity of the needle seat fixing pin are limited by the inner cavity diameter smaller than the needle fixing pin, a positioning groove is formed in the center of the upper end of the needle fixing pin and used for accommodating the lower end of the needle tube, a limiting piece is connected to the bottom of the needle fixing pin of the inner cavity of the needle seat fixing pin and used for limiting the position of the needle fixing pin in the needle seat and preventing the needle fixing pin from falling off from the inner cavity of the needle seat fixing pin, and the needle fixing pin and the positioning groove and the coaxial fixing pin are arranged on the axis of the needle seat.
The limiting piece comprises a first screw which is abutted with the lower end face of the needle fixing pin, a second screw which is positioned below the first screw, and the first screw and the second screw are connected through a bolt.
The first screw, the second screw and the bolt are coaxially arranged with the axis of the needle seat fixing pin, and a gap is reserved between the first screw and the second screw.
The contact surface of the first screw and the needle fixing pin is a plane, a first threaded hole connected with the bolt is formed in the axis of the first screw, which is close to the second screw, an internal thread matched with the external thread of the bolt is formed in the first threaded hole, a second threaded hole is formed in the second screw, the second threaded hole is a through hole penetrating through the second screw up and down, and the bolt is allowed to penetrate through the second screw in a threaded movement mode.
The upper end of the outer side wall of the needle seat fixing pin, which is sleeved on the needle seat, is the upper end of a first cylinder body and the upper end of a second cylinder body, the outer side wall of the first cylinder body is connected with the thread area of the inner side wall of the needle seat, the outer side wall of the upper end of the second cylinder body is used for being connected with the inner cavity wall below the inner threads of the inner cavity of the needle seat and used for fixing the needle seat in a positioning way, and the lower end of the outer side wall of the needle seat fixing pin is a third cylinder body which is installed on a tool bar and matched with a single station in the tool bar.
The utility model discloses a needle tube fixing device, including needle fixing pin, needle bar, boss, needle bar, single installation station assorted in lateral wall and the frock strip of third cylinder, be equipped with convex spacing portion on the needle fixing pin, the convex spacing portion of needle fixing pin is the boss, the boss is used for right the needle fixing pin is spacing, the needle file fixing pin be in the needle fixing pin with the locating part is in the inner chamber of the mounted position in the needle file fixing pin with needle fixing pin with locating part assorted, needle fixing pin upper end central authorities are equipped with the guiding groove, the guiding groove is wide in the top down narrow round platform, is used for guiding the needle tube lower extreme extremely in the constant head tank on the axis of needle file fixing pin.
In order to facilitate the needle tube to enter the positioning groove, a chamfer is arranged at the upper end opening of the positioning groove, and the chamfer is distributed along the circumference of the upper end opening of the positioning groove.
The inner wall of the positioning groove is attached to the outer wall of the needle tube, and the lower end of the needle tube is allowed to slide freely and axially along the inner wall of the positioning groove.
For easy to assemble, the upper end of first cylinder with the second cylinder all is equipped with the chamfer.
The outer circumferential diameter of the upper end portion of the second cylinder is larger than the diameter of the first cylinder.
The needle holder fixing pin has the advantages and positive effects that due to the adoption of the technical scheme, the lower end of the needle holder fixing pin is connected with the tool bar, the upper end of the needle holder fixing pin is connected with the needle holder, the first screw, the second screw and the bolt are coaxially arranged with the axis of the needle holder fixing pin, a gap is reserved between the first screw and the second screw, internal stress is formed between the first screw and the second screw due to the gap, the internal stress is not easy to fall off, the cylindrical locating groove of the needle fixing pin can better ensure the skewness of an upper needle compared with other shapes such as a cone shape, the height of the needle tube can be limited by the locating groove, the installation height of the needle tube is uniform, the upper needle height is good, the upper needle skewness control effect is good, the needle holder fixing pin is used for connecting and positioning the needle holder, the locating groove of the needle fixing pin utilizes the principle that two points determine a straight line, the locating groove of the needle fixing pin and the needle holder penetrate through a through hole, the upper needle skewness and the upper needle height are guaranteed, the upper needle skewness control effect is good, the design of the guide groove can better facilitate the needle lowering, and the end part is fast lowered into the locating groove.
Drawings
FIG. 1 is a schematic view showing the structure of a needle fixing pin in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of an upper needle assembly according to embodiment 1 of the present invention;
FIG. 3 is a schematic A-A sectional view of an upper needle tool according to embodiment 1 of the present invention;
FIG. 4 is a schematic diagram illustrating the use of the upper needle tool of embodiment 1 of the present invention on a tool bar;
fig. 5 is a schematic structural diagram of an upper needle tool of embodiment 1 of the present invention on a tooling bar with A-A section and an enlarged surface of the A-A section.
In the figure:
1. The novel needle holder comprises a needle holder body, a needle tube, a needle holder fixing pin, a needle fixing pin, a guide groove, a positioning groove, a limiting piece, a first screw, a bolt, a second screw and a tool bar.
Detailed Description
Specific example 1: 1-5, an upper needle fixture for installing a needle tube into a through hole at the center of a corresponding needle seat and guaranteeing the skew degree and uniform height of the upper needle, comprising a needle seat fixing pin 3 with an opening at the upper end and used for fixing the needle seat 1, wherein a through hole allowing the needle tube 2 to pass through is arranged on the central shaft of the needle seat 1 and penetrates through the top cover of the needle seat 1, the inner diameter of the through hole is slightly larger than the outer diameter of the needle tube 2 and the needle tube 2 can slide up and down in the through hole without barriers, the outer side wall of the needle seat fixing pin 3 of a cylindrical body with a hollow inner cavity is at least composed of cylinders with three diameters, a first cylinder, a second cylinder and a third cylinder are respectively arranged from top to bottom, as shown in figure 2, the outer side wall of the needle seat fixing pin 3 of the specific embodiment is composed of cylinders with three diameters, the outer side wall of the first cylinder is connected with the inner side wall of the needle seat 1, the outer side wall of the upper end of the second cylinder is used for being tightly attached and connected with the smooth inner cavity wall below the inner thread of the inner cavity of the needle seat 1 and used for fixing the needle seat 1, the outer side wall of the third cylinder is matched with a single installation station in the tool bar 8 and used for installing the needle seat fixing pin 3 on the tool bar 8, the inner cavity of the needle seat fixing pin 3 is internally provided with a needle fixing pin 4 with a cylinder structure and used for limiting and fixing the lower end part of the needle tube 2 and ensuring the upper needle skew and the installation height of the needle tube 2, the needle fixing pin 4 and the needle tube 2 are coaxially arranged, the needle fixing pin 4 is provided with a protruding limiting part and used for limiting the needle fixing pin 4, the protruding limiting part of the needle fixing pin 4 is a boss and the needle fixing pin 4 is provided with two layers of steps in a cylindrical shape, the diameter of the cylinder of the boss positioned at the lower layer is larger than that of the cylinder positioned at the upper layer, the two round table axes are coaxially arranged, and the stepped shape is used for limiting the upper installation position of the needle fixing seat 4. The center of the upper end of the needle fixing pin 4 is provided with a cylindrical positioning groove 6 for accommodating the lower end part of the needle tube 2 to limit the installation position of the needle tube 2, the positioning groove 6 and the axis of the needle tube 2 are coaxially arranged, and the needle tube 2 is provided with a plurality of positioning grooves
The upper end center of needle fixed pin 4 is equipped with constant head tank 6, is used for holding the lower tip of needle tubing 2, needle fixed pin 3's inner chamber the bottom of needle fixed pin 4 is connected with locating part 7, is used for prescribing a limit to needle fixed pin 4 is in needle fixed pin 3's position prevents needle fixed pin 4 is followed needle fixed pin 3 inner chamber drops, first cylinder, second cylinder, third cylinder, needle fixed pin 4, guiding slot 5, constant head tank 6 all with the coaxial setting of axis of needle fixed pin 3.
The stopper 7 includes a first screw 71 abutting against the lower end surface of the needle fixing pin 4, a second screw 73 located below the first screw 71, and the first screw 71 and the second screw 73 are connected by a bolt 72.
The first screw 71, the second screw 73 and the bolt 72 are coaxially arranged with the axis of the needle seat fixing pin 3, and a gap is reserved between the first screw 71 and the second screw 72. The gap allows the first screw 71 and the second screw 72 to form internal stress, preventing falling off.
The contact surface of the first screw 71 and the needle fixing pin 4 is a plane, the outer side wall of the first screw 71 is provided with external threads, a corresponding internal thread is arranged in the mounting position of the first screw 71 in the inner cavity of the needle seat fixing pin 3, a first threaded hole connected with the bolt 72 is formed in the axis of one surface of the first screw 71, which is close to the second screw 73, the bolt 72 is a tensioning bolt, an internal thread matched with the external threads of the bolt 72 is arranged in the first threaded hole, the second screw 73 is a tensioning screw internally provided with a second threaded hole, and the second threaded hole is a through hole penetrating up and down, so that the bolt 72 is allowed to penetrate the second screw 73 in a threaded movement mode. The contact surface between the first screw 71 and the needle fixing pin 4 is a plane, the planar contact surface is used for preventing the needle fixing pin 4 from falling off, and the planar contact surface can be stressed relatively smoothly, so that it is easy to think by those skilled in the art that the first screw 71 is also feasible to use a threaded through hole with internal threads, and the bolt 72 does not need to expose the upper plane of the first screw 71 when actually mounted and used, because the horizontal cross-sectional area of the bolt 72 is smaller, and the effect of abutting the needle fixing seat 4 is not ideal.
The inner cavity of the needle fixing pin 4 and the limiting piece 7 of the needle seat fixing pin 3 at the installation position in the needle seat fixing pin 3 is matched with the needle fixing pin 4 and the limiting piece 7, a guide groove 5 is arranged in the center of the upper end of the needle fixing pin 4, and the guide groove 5 is a round table with a wide upper part and a narrow lower part and is used for guiding the lower end of the needle tube 2 to the inside of the positioning groove 6 on the axis of the needle seat fixing pin 3.
In order to facilitate the needle tube 2 to enter the positioning groove 6, a chamfer is arranged at the upper end opening of the positioning groove 6, and the chamfer is distributed along the circumference of the upper end opening of the positioning groove 6.
The inner wall of the positioning groove 6 is attached to the outer wall of the needle tube 2 or slightly larger than the outer wall of the needle tube 2, so that the lower end of the needle tube 2 is allowed to slide freely and axially along the inner wall of the positioning groove 6. The difference between the diameter of the positioning groove 6 and the diameter of the outer wall of the needle tube 2 is more than 0 and less than or equal to 6 threads, and 1 thread is equal to 0.01 millimeter, which is a common non-legal measuring unit. The diameter of the positioning groove 6 is a key factor for controlling the skew effect of the upper needle, the skew effect of the upper needle depends on the diameter of the positioning groove 6, the diameter of the positioning groove 6 is larger, the skew of the upper needle is overlarge, products are disqualified or used under influence, the diameter of the positioning groove 6 is smaller, the needle is difficult to lower, namely, the needle tube 2 is difficult to enter the positioning groove 6, and the diameter of the positioning groove 6 is larger than the diameter of the outer wall of the needle tube 2. The depth of the positioning groove 6 is related to the total length of the needle tube 2, the length of the used part of the needle tube 2 which is required to be reserved outside the needle seat 1, and the required length of the needle tube 2 in the needle cylinder, and can be different according to practical situations. The installation test of the disposable pen type injection needle is summarized to be preferable, the needle tube can be positioned, the whole set of device is simple to process, the depth of the positioning groove is 1.1mm to 1.7mm, the upper end and the lower end of the needle tube 2 are sharp one-side inclined planes, the smaller the sectional area of the needle tube 2 is, the smaller the sectional area of the positioning groove 6 is, the better positioning effect cannot be achieved, the needle tube 2 is easy to incline, and the depth of the positioning groove 6 is 1.1mm to 1.7mm, so that the needle tube 2 can be installed on the needle seat 1 and in smaller left-right deviation, and the national standard and the industry standard are met.
The upper end center of the needle seat locating pin 3 and the upper end of the locating groove 6 are provided with openings, after the needle seat 2 is mounted on the needle seat fixing pin 3, the openings form a cavity, the needle tube 2 is guaranteed to smoothly reach the locating groove 6, in the embodiment, the upward limit in the inner cavity of the needle seat fixing pin 3 is realized by clamping the top surface of the boss by the boss arranged below the needle fixing pin 4 and the inner cavity correspondingly matched with the needle seat fixing pin 3, and the needle fixing pin 4 is limited to move upwards, so that the size of the cavity is larger than the size of the upper end of the needle seat fixing pin, the cavity above the locating groove does not play any blocking limiting role on the upper end of the needle seat fixing pin, and therefore, the needle seat fixing pin 4 is not required to be clamped for limiting, and the diameter of the cavity is consistent with the diameter of the mounting operation space of the lower end of the needle seat fixing pin 3 as shown in fig. 2 and 3.
For easy to assemble, the upper end of first cylinder with the second cylinder all is equipped with the chamfer.
The outer circumferential diameter of the upper end portion of the second cylinder is larger than the diameter of the first cylinder.
The needle fixing pin 4 and the limiting piece 7 are placed into corresponding positions in the inner cavity of the needle seat fixing pin 3 from the lower end opening of the needle seat fixing pin.
When the needle holder fixing pin is used, the limiting piece 7 is assembled in an external group, the limiting piece 7 is assembled and then is installed in an inner cavity of the needle holder fixing pin 3, the second screw 73 is screwed to the bottom end of the screw 72 from the upper end of the screw 72, the first screw is installed on the screw, a gap is reserved between the first screw 71 and the second screw 73, the limiting piece 7 is assembled and then is placed at the lower end of the needle holder fixing pin 3, the limiting piece 7 is pushed upwards, the screw 72 is screwed after encountering resistance, and the external screw thread of the first screw 71 is in threaded connection with the internal screw thread at the corresponding position in the inner cavity of the needle holder fixing pin 3 until the top surface of the first screw 71 is in butt joint with the bottom surface of the needle fixing pin 4. Needle fixed pin 4 with locating part 7 is followed in proper order needle base fixed pin 3 lower extreme opening is put into in the needle base fixed pin 3, protruding spacing portion is the boss on the needle fixed pin 4, when needle fixed pin 4 reaches correspond the mounted position in the needle base fixed pin 3 inner chamber, the boss is spacing needle fixed pin 4 can not continue upwards to remove again, locating part 7 is in needle fixed pin 4 lower extreme prevents needle fixed pin 4 follow come off in the needle base fixed pin 3 inner chamber, will needle base 1 threaded connection is in during the installation needle tube needle base 3 upper end needle base fixed pin 3, needle tube 2 follow on the center pin of needle base 1 and run through the top cap of needle base 1 be equipped with the confession in the through-hole that needle tube 2 passed through passes, through the guide effect of guide slot 5 gets into cylindricality constant head tank 6 fast, and single needle and needle base installation are accomplished. A plurality of needle feeding tools can be arranged on the tool bar 8 to finish the line production of the installation of the needle tube and the needle seat.
Embodiment 2 the difference between embodiment 2 and embodiment 1 is only that the guide groove 5 is omitted, and in order to facilitate the needle tube 2 to enter the positioning groove 6, the upper end opening of the positioning groove 6 is provided with chamfers, and the chamfers are distributed along the circumference of the upper end opening of the positioning groove 6.
The inner wall of the positioning groove 6 is attached to the outer wall of the needle tube 2, and the lower end of the needle tube 2 is allowed to slide freely and axially along the inner wall of the positioning groove 6.
Example 3 the difference from example 1 is only that the difference between the diameter of the positioning groove 6 and the diameter of the outer wall of the needle tube 2 is 5 threads.
The three embodiments of the present invention have been described in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110555901.7A CN113146522B (en) | 2021-05-21 | 2021-05-21 | Needle making tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110555901.7A CN113146522B (en) | 2021-05-21 | 2021-05-21 | Needle making tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113146522A CN113146522A (en) | 2021-07-23 |
| CN113146522B true CN113146522B (en) | 2025-05-16 |
Family
ID=76876903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110555901.7A Active CN113146522B (en) | 2021-05-21 | 2021-05-21 | Needle making tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113146522B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203600164U (en) * | 2013-12-16 | 2014-05-21 | 江西丰临医疗科技股份有限公司 | Pen-holder straight type remaining needle tool |
| CN204295566U (en) * | 2014-08-27 | 2015-04-29 | 苏州捷碧医疗科技有限公司 | A kind of automatic centring device based on pen-type injector needle fits |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001502191A (en) * | 1996-02-27 | 2001-02-20 | インジェクタイムド・インコーポレーテッド | Hypodermic needle tip guard |
| CN201492770U (en) * | 2009-08-20 | 2010-06-02 | 李慧慧 | Special positioning module for disposable safety syringe needle |
| CN108404257B (en) * | 2018-02-06 | 2023-06-30 | 贝普医疗科技股份有限公司 | Safety insulin needle |
| CN215036946U (en) * | 2021-05-21 | 2021-12-07 | 威海威高洁盛医疗器材有限公司 | Needle-inserting tool |
| CN214723724U (en) * | 2021-05-21 | 2021-11-16 | 威海威高洁盛医疗器材有限公司 | Needle fixing pin and upper needle tool |
-
2021
- 2021-05-21 CN CN202110555901.7A patent/CN113146522B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203600164U (en) * | 2013-12-16 | 2014-05-21 | 江西丰临医疗科技股份有限公司 | Pen-holder straight type remaining needle tool |
| CN204295566U (en) * | 2014-08-27 | 2015-04-29 | 苏州捷碧医疗科技有限公司 | A kind of automatic centring device based on pen-type injector needle fits |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113146522A (en) | 2021-07-23 |
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