Dosing needle head capable of avoiding influence of sealing negative pressure
By designing a negative pressure balance needle, the needle can be retractable sliding and air pressure communication, which solves the problem of negative pressure in the sealing powder bottle, and improves the mixing efficiency of the drug liquid and powder and the convenience of the retraction process.
Patent Information
- Application Number
- CN202510284889.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-05-30
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
After the existing dosing needles are injected and mixed with the medicine liquid, the sealing negative pressure in the powder bottle makes the retraction more laborious, which easily leads to retraction problems, increasing the difficulty and time-consuming operation.
A dosing needle is designed to avoid the influence of negative sealing pressure. The needle is set up with a negative pressure balanced needle. The needle is a retractable sliding structure, and the initial retraction and snap-in position is fixed. It penetrates the rubber seal plug of the powder bottle and is injected in the air. After the injection, the needle is twisted through the sliding joint snap-in structure to extend the needle to the bottom of the powder bottle, which facilitates the respiration of the liquid. At the same time, through the design of the air pressure smoothing chute and the functional slip ring, the air pressure communication is achieved and the negative pressure resistance is eliminated.
The mixing efficiency of the medicinal liquid and the medicinal powder is improved, the operation steps and time-consuming are reduced, the needle bend and syringe throwing problems caused by shaking and stirring are avoided, and the negative pressure resistance is eliminated during the retraction process, simplifying the operation.
Smart Images
Figure CN120053288A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medicine adding devices, and particularly to a medicine adding needle that avoids the influence of sealed negative pressure. Background Art
[0002] A medicine adding needle is a fitting installed on a medicine adding device such as a syringe for communicating with a medicine powder bottle. The sharp end of the needle pierces into the rubber stopper of the medicine powder bottle, so that the medicine liquid can be injected into the medicine powder bottle through the syringe and fully mixed with the internal medicine powder. After forming a medicated liquid with medical value, it is sucked back into the syringe through the needle again. However, during the use process, after injecting the medicine liquid, some of the medicine powder and the medicine liquid have poor compatibility, so it is necessary to shake it several times. During this process, it is necessary to remove the syringe to avoid problems such as the syringe being thrown out or the needle being bent. However, this process increases multiple steps and is time-consuming and laborious. Moreover, due to the good sealing effect of the medicine powder bottle, after the injection and mixing of the medicine liquid are completed, during the suction-back stage, due to the formation of negative pressure in the medicine powder tube, the back suction is more laborious and the retraction problem is likely to occur. Summary of the Invention
[0003] The purpose of the present invention is to provide a medicine adding needle that avoids the influence of sealed negative pressure, so as to overcome the above-mentioned defects in the prior art.
[0004] The present invention is realized through the following technical solutions.
[0005] A medicine adding needle that avoids the influence of sealed negative pressure according to the present invention includes a needle tube. An injection communication groove is provided in the needle tube. A needle carrying tube is rotatably installed in the needle tube. An optimized needle structure is slidably installed in the needle carrying tube. The optimized needle structure includes a functional needle. An injection through groove is provided in the functional needle. An outer wall groove is provided on the outer wall of the functional needle. A slidable outer wall groove is installed in the outer wall groove. An air pressure smoothing groove is provided on the outer wall of the functional needle. A functional sliding ring is installed on the functional needle. A communication end is provided in the functional sliding ring. The communication end is communicated with the air pressure smoothing groove. An elastic extension cavity is provided in the needle carrying tube. The functional sliding ring is slidably installed in the elastic extension cavity. An air pressure communication groove is provided in the elastic extension cavity. A thumb lever is installed on the needle carrying tube.
[0006] In a further technical solution, a clamping rotation groove is provided on the inner wall of the needle tube. The end of the functional needle is slidably placed in the clamping rotation groove. Two rotation convex grooves are symmetrically provided in the clamping rotation groove.
[0007] In a further technical solution, a clamping block is installed on the functional needle. The clamping block is placed in the clamping rotation groove.
[0008] In a further technical solution, an elastic extension spring is installed in the elastic extension cavity. The end of the elastic extension spring is connected to the functional sliding ring.
[0009] According to a further technical solution, a pneumatic sliding cavity is provided at the lower side of the outer wall groove, a sliding rod is slidably installed in the pneumatic sliding cavity, a return spring is installed on the sliding rod, a connecting slip ring is installed on the end of the sliding rod, and the mesh structure tube is installed on the connecting slip ring.
[0010] According to a further technical solution, an outer wall of the functional needle is provided with an air pressure push-in groove, and a distal end of the air pressure push-in groove is connected to the air pressure sliding cavity.
[0011] According to a further technical solution, a pressure relief hole is provided on the outer wall of the functional needle, and a terminal end of the pressure relief hole is connected to the air pressure sliding cavity.
[0012] Beneficial effects of the present invention:
[0013] The drug adding needle of the present invention avoids the influence of the sealing negative pressure through the setting of the negative pressure balancing needle. The needle is a retractable sliding structure in the needle tube. The needle is initially in a retracted clamping position fixed state, so that the needle is in a top suspended position in the powder bottle after penetrating the rubber sealing plug of the powder bottle, so as to inject the liquid medicine. The suspension causes the liquid medicine injection link to increase the impact force of the liquid medicine, so that the powder in the powder bottle is quickly dispersed and the mixing efficiency with the liquid medicine is improved. At the same time, after the injection is completed, the needle is stretched and elongated by the twisting of the sliding clamping structure, so that the end is placed at the bottom of the powder bottle, so as to facilitate the back-suction action after the liquid medicine is mixed.
[0014] The present invention provides a drug-adding needle that avoids the influence of sealed negative pressure. Through the setting of the negative pressure balancing needle, the slidably arranged needle can be driven to rotate by the thumb-turning lever at the outer end of the needle wrapping structure after completing the injection of the drug solution, so that the needle is no longer fixed in the needle tube, thereby driving the needle to elastically extend against the bottom of the powder bottle for easy suction of the drug solution. At the same time, during the elastic extension process of the needle, the airtight component pushes the mesh structure that is contracted and arranged on the outer wall of the needle end to be compressed, so that the mesh expands outward and cooperates with the elastic extension action to form an impact force on the drug solution in the powder bottle, accelerate the floating of the drug powder that is not completely dissolved in the drug solution, and at the same time cooperates with the thumb to move the thumb-turning lever to drive the needle to rotate, so that the mesh structure in the expanded state forms a stirring effect on the internal drug solution, so that the drug solution and the drug powder are fully mixed, and there is no need for a pulling action and the problem that shaking and stirring may easily cause the needle to bend and the syringe to be thrown out is avoided. At the same time, under the pulling action, the mesh structure is connected through the airtight hole and automatically retracts to avoid affecting the pulling action.
[0015] A medicine adding needle that avoids the influence of sealed negative pressure is provided with a negative pressure balancing needle. The elimination of the negative pressure in the medicine powder bottle is completed by a slidable needle. After the liquid medicine injection is completed, the needle rebounds. There are air hole structures on the side wall of the needle. After rebounding, the bottom air hole is placed in the upper space of the medicine powder bottle, and the end of the air hole groove is connected to the outside atmosphere through a sliding block placed at the end of the rebounding cavity. Thus, during the process of withdrawing the liquid medicine after the mixing action of the medicine powder and the liquid medicine is completed, the internal and external air pressures are connected through the air holes, so that the resistance effect caused by the negative pressure is eliminated during the withdrawing process. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] The present invention will be further described below in conjunction with the drawings and embodiments.
[0018] Figure 1 is the overall schematic diagram of the present invention;
[0019] Figure 2 is the overall structural schematic diagram of the present invention;
[0020] Figure 3 is Figure 1 the enlarged structural schematic diagram of the optimized needle structure 15 in
[0021] Figure 4 is Figure 3 the enlarged structural schematic diagram of part A in
[0022] Figure 5 is Figure 3 the enlarged structural schematic diagram of part B in DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The following will Figures 1 - 5 describe the present invention in detail. For the sake of convenience of narration, the following directions are defined as follows: the up, down, left, right, front, and back directions mentioned below are the same as the up, down, left, right, front, and back directions of the Figure 1 itself in the projection relationship.
[0024] Combined with the attached Figures 1 - 5The described medicine-adding needle for avoiding the influence of sealed negative pressure includes a needle tube 11. An injection communication groove 16 is arranged inside the needle tube 11. A needle mounting tube 14 is rotatably installed on the needle tube 11. An optimized needle structure 15 is slidably installed on the needle mounting tube 14. The optimized needle structure 15 includes a functional needle 30. An injection through groove 32 is arranged inside the functional needle 30. An outer wall groove 33 is arranged on the outer wall of the functional needle 30. A slidable outer wall groove 33 is installed inside the outer wall groove 33. An air pressure smoothing groove 41 is arranged on the outer wall of the functional needle 30. A functional sliding ring 39 is installed on the functional needle 30. A communication end 40 is arranged inside the functional sliding ring 39. The communication end 40 communicates with the air pressure smoothing groove 41. An elastic extension cavity 23 is arranged inside the needle mounting tube 14. The functional sliding ring 39 is slidably installed inside the elastic extension cavity 23. An air pressure communication groove 28 is arranged in the elastic extension cavity 23. A thumb lever 13 is installed on the needle mounting tube 14.
[0025] During operation, the installation and connection is completed by inserting the syringe head into the injection connecting groove 16, and the functional needle 30 is inserted into the powder bottle through the rubber sealing plug. Initially, only a part of the functional needle 30 is placed outside the needle carrying tube 14, so that the end of the functional needle 30 is located at the upper side of the powder bottle and has a certain suspended height with the bottom, so that the liquid medicine is pushed into the powder bottle by pushing the syringe, and the falling impact force of the liquid medicine is increased by the suspended height, so that the internal powder is fully dispersed and the mixing efficiency is improved. After the liquid medicine is filled, the thumb lever 13 is moved by the thumb, so that the needle carrying tube 14 drives the functional needle 30 to rotate a certain angle, so that the end of the functional needle 30 is placed in the needle tube 11 The fixed structure eliminates the blocking effect, thereby driving the functional needle 30 to stretch and slide, so that the end is against the bottom of the powder bottle. During the process, the air pressure of the airtight transmission structure part in the elastic extension cavity 23 is used to drive the mesh structure tube 35 to slide and retract, so that the mesh structure tube 35 becomes a compressed outward expansion structure under the retraction effect, thereby When the functional needle 30 is extended into the liquid medicine, the mesh structure tube 35 forms an impact effect on the liquid medicine, thereby improving the fluidity of the undissolved powder in the liquid medicine. At the same time, the thumb lever 13 is moved by the finger to drive the needle carrying tube 14 and the functional needle 30 to rotate, thereby forming a stirring effect on the inside of the liquid medicine through the mesh structure tube 35 in the compressed and expanded state, thereby improving the full mixing effect of the powder and liquid medicine. When the functional sliding ring 39 slides to the end of the elastic extension cavity 23, the connecting end 40 is connected to the air pressure connecting groove 28, thereby making The air pressure smooth groove 41 is connected to the outside world, and the terminal hole of the air pressure smooth groove 41 is placed inside the medicine powder bottle, so that the air pressure inside the medicine powder bottle is kept constant with the outside world, thereby eliminating the influence of negative pressure resistance during the process of withdrawing the mixed medicine liquid. The inner wall of the elastic cavity 23 has vertical lines, and the outer wall of the functional sliding ring 39 has vertical protrusions, so that the functional sliding ring 39 is only allowed to slide up and down in the elastic cavity 23 but not rotate, so that the effect of driving the functional needle 30 to rotate can be achieved through the needle carrying tube 14.
[0026] Preferably, the inner wall of the needle tube 11 is provided with a locking groove 18, and the end of the functional needle 30 is slidably placed in the locking groove 18, and the locking groove 18 is symmetrically provided with two rotating protruding grooves 19.
[0027] The locking and fixing effect of the functional needle 30 is controlled by the rotating convex groove 19 in the locking rotation groove 18, and the rotating convex groove 19 at the end has the effect of allowing the functional needle 30 to rotate after the elastic extension is completed.
[0028] Preferably, the functional needle 30 is provided with a clamping block 31 , and the clamping block 31 is placed in the clamping position rotation groove 18 .
[0029] The rotation convex groove 19 below the card slot rotating groove 18 positions the card block 31, and the function needle 30 is driven to rotate by the needle mounting tube 14, so that the card block 31 rotates to the card slot rotating groove 18, and then drives the function needle 30 to spring out under the effect of the spring. The upper rotation convex groove 19 allows the rotation of the card block 31.
[0030] Preferably, an extension spring 26 is installed in the extension cavity 23, and the end of the extension spring 26 is connected to the function sliding ring 39.
[0031] After the card block 31 rotates to the card slot rotating groove 18, under the effect of the extension spring 26, the function needle 30 springs out.
[0032] Preferably, a pneumatic sliding cavity 38 is provided below the outer wall groove 33. A sliding rod 37 is slidably installed in the pneumatic sliding cavity 38. A return spring 36 is installed on the sliding rod 37. The end of the sliding rod 37 is installed with a connecting sliding ring 34, and the wire mesh structure tube 35 is installed on the connecting sliding ring 34.
[0033] By filling the pneumatic sliding cavity 38 with air pressure, the sliding rod 37 is pushed to slide, so as to squeeze and retract the wire mesh structure tube 35 into an expanded state.
[0034] Preferably, a pneumatic push groove 42 is provided on the outer wall of the function needle 30, and the end of the pneumatic push groove 42 communicates with the pneumatic sliding cavity 38.
[0035] During the sliding process of the function sliding ring 39, it forms a pushing effect on the air pressure in the extension cavity 23, so that part of the air pressure is filled into the pneumatic sliding cavity 38 through the pneumatic push groove 42, and the sliding rod 37 is pushed to slide.
[0036] Preferably, a pressure relief hole 43 is provided on the outer wall of the function needle 30, and the end of the pressure relief hole 43 communicates with the pneumatic sliding cavity 38.
[0037] When the function needle 30 is in the inserted and extended state, the pressure relief hole 43 abuts against the rubber plug, so as to achieve a sealing effect. The air pressure pushed into the pneumatic sliding cavity 38 by the pneumatic push groove 42 is fixed, so that the wire mesh structure tube 35 maintains an expanded state. When pulled outwards, the pressure relief hole 43 is disengaged from the blocked state of the rubber plug, so that the air pressure in the pneumatic sliding cavity 38 is released. Thus, the wire mesh structure tube 35 quickly resets under the effect of the return spring 36 to avoid affecting the pulling-out action.
[0038] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims
1. A dosing needle to avoid the influence of sealing negative pressure, comprising a needle tube, wherein the needle tube is provided with an injection connecting groove, characterized in that: The needle tube is rotatably installed with a needle carrying tube, and the needle carrying tube is slidably installed with an optimized needle structure, the optimized needle structure includes a functional needle, an injection groove is provided in the functional needle, an outer wall of the functional needle is provided with an outer wall groove, a slidable outer wall groove is installed in the outer wall groove, an air pressure smooth groove is provided on the outer wall of the functional needle, a functional slip ring is installed in the functional slip ring, a connecting end is provided in the functional slip ring, and the connecting end is connected with the air pressure smooth groove, an elastic extension cavity is provided in the needle carrying tube, the functional slip ring is slidably installed in the elastic extension cavity, the elastic extension cavity is provided with an air pressure connecting groove, and a thumb lever is installed on the needle carrying tube.
2. A drug dosing needle that avoids the influence of sealing negative pressure according to claim 1, characterized in that: The inner wall of the needle tube is provided with a locking groove, and the end of the functional needle is slidably placed in the locking groove, and the locking groove is symmetrically provided with two rotating convex grooves.
3. A drug-adding needle for avoiding the influence of sealing negative pressure according to claim 2, characterized in that: The functional needle is equipped with a clamping block, and the clamping block is placed in the clamping position rotation groove.
4. A drug-adding needle for avoiding the influence of sealing negative pressure according to claim 1, characterized in that: An elastic spring is installed in the elastic cavity, and the end of the elastic spring is connected to the functional slip ring.
5. A drug-adding needle for avoiding the influence of sealing negative pressure according to claim 1, characterized in that: An air pressure sliding cavity is provided at the lower side of the outer wall groove, a sliding rod is slidably installed in the air pressure sliding cavity, a return spring is installed on the sliding rod, a connecting sliding ring is installed on the end of the sliding rod, and the mesh structure tube is installed on the connecting sliding ring.
6. A drug-adding needle for avoiding the influence of sealing negative pressure according to claim 5, characterized in that: An air pressure push-in groove is arranged on the outer wall of the functional needle, and the end of the air pressure push-in groove is connected to the air pressure sliding cavity.
7. A drug-adding needle for avoiding the influence of sealing negative pressure according to claim 5, characterized in that: The outer wall of the functional needle is provided with a pressure relief hole, and the end of the pressure relief hole is connected to the air pressure sliding cavity.