CN215426629U

CN215426629U - Quantitative injection syringe

Info

Publication number: CN215426629U
Application number: CN202121201249.0U
Authority: CN
Inventors: 韩小娟
Original assignee: Ningbo Beilun Third People's Hospital Medical And Health Service Group
Current assignee: Ningbo Beilun Third People's Hospital Medical And Health Service Group
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-01-07
Anticipated expiration: 2031-05-31

Abstract

The utility model provides a quantitative injection syringe, which comprises a syringe and a piston rod connected in the syringe in a sealing sliding manner, wherein one end of the syringe is provided with an injection port, the other end of the syringe is provided with a sliding hole for inserting the piston rod, the end face of the piston rod is connected with a control rod in a sliding manner, the side wall of the control rod is provided with a positioning lug, the inner wall of the syringe is provided with a fixed block, and when the piston rod is pulled out from one side deviating from the injection port, the positioning lug is abutted against the fixed block. During the use, medical personnel can be according to the required liquid medicine injection volume of bacterin, the control lever of connection on the piston rod is slided in slide adjusting, further distance between adjustable locating lug and the fixed block deviates from the distance that injection port one side was extracted with control piston rod, has realized the service function of the ration extraction liquid medicine of cylinder from this, need not so that medical personnel frequently go whether the liquid medicine volume of suction in the cylinder of observation is in suitable interval when extracting the liquid medicine through the cylinder, the use of cylinder is comparatively convenient.

Description

Quantitative injection syringe

Technical Field

The utility model relates to the field of medical instruments, in particular to a quantitative injection needle cylinder.

Background

At present, Chinese patent with publication number CN201719630U discloses a novel vaccine injector, which comprises a needle head, a needle cylinder, a pintle and a piston, wherein the needle head is arranged at the front end of the needle cylinder, and the piston is connected in the piston in a sealing and sliding manner. When the negative pressure injection syringe is used, the pintle drives the piston to slide in the syringe, the piston slides to one side departing from the needle head, negative pressure is generated in the syringe, liquid medicine to be injected is sucked into the syringe through the needle head, and then the needle head is inserted into a vein of an vaccinator to complete injection. However, in the actual vaccination work, the amount of vaccine solution that a human body needs to inject at one time has the best numerical value, so often need medical personnel to constantly go to observe whether the content of the liquid medicine of suction in the syringe is in suitable interval when using the syringe to draw the liquid medicine, so use comparatively inconveniently.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a quantitative syringe capable of quantitatively drawing a liquid medicine without frequently observing the content of the liquid medicine drawn in the syringe.

In order to solve the technical problems, the technical scheme of the utility model is as follows: a quantitative injection needle cylinder comprises a needle cylinder and a piston rod connected in the needle cylinder in a sealing sliding mode, wherein an injection port is formed in one end of the needle cylinder, a sliding hole for the piston rod to insert is formed in the other end of the needle cylinder, a control rod is connected to the end face of the piston rod in a sliding mode, a positioning lug is arranged on the side wall of the control rod, a fixing block is arranged on the inner wall of the needle cylinder, the control rod slides along the length direction of the needle cylinder, when the piston rod deviates from one side of the injection port and is pulled out, the positioning lug is abutted to the fixing block, a locking assembly is arranged between the control rod and the piston rod, and the locking assembly is used for fixing the relative position of the control rod and the piston rod.

Through the technical scheme, when the piston rod deviates from injection port one side and is pulled out in order to extract the liquid medicine, can drive the control lever and deviate from injection port one side together and pull out, the locating lug that sets up in control lever lateral wall department can be inconsistent with the fixed block that sets up on the cylinder inner wall at this in-process, during the use, medical personnel can be according to the required liquid medicine injection volume of bacterin, the slide adjusting slides the control lever of connection on the piston rod, further adjustable setting is at the distance that the distance between locating lug and the fixed block on the control lever lateral wall deviates from injection port one side with control piston rod and extracts, the service function of the ration extraction liquid medicine of cylinder has been realized from this, so need not medical personnel and frequently go whether the liquid medicine volume of suction in the cylinder of observation when extracting the liquid medicine through the cylinder is in suitable interval, the use of cylinder is comparatively convenient.

Preferably, a sliding groove communicated with the sliding hole is formed in the end face, far away from the injection port, of the needle cylinder, the fixing block is connected in the sliding groove in a sliding mode, a first spring is arranged between the fixing block and the sliding groove, and the first spring is used for pushing the fixing block into the sliding hole.

Through above-mentioned technical scheme, the fixed block slides and connects in the groove that slides, when needs extract the piston rod completely from the hole that slides, can promote fixed block extrusion spring one and make the fixed block withdraw in the groove that slides, can extract the piston rod from the hole that slides afterwards, so make the using-way of cylinder comparatively nimble convenient. And because the fixed block is connected on the end face of the needle cylinder far away from the injection port in a sliding manner, a larger sliding distance is formed between the positioning lug and the fixed block, so that the needle cylinder can quantitatively extract a larger volume of liquid medicine. In addition, the needle cylinder has the advantages of convenience and cost saving in processing and manufacturing, and the needle cylinder and the piston rod can be manufactured in a split mode and assembled and formed in the later period due to the fact that the needle cylinder and the piston rod can be disassembled. The practicability and the reliability of the needle cylinder are reflected.

Preferably, the lateral wall in groove of sliding has seted up the chucking groove, be provided with the chucking piece on the lateral wall of fixed block, the chucking piece slide connect in the chucking groove.

Through above-mentioned technical scheme, medical personnel pass through the in-process of cylinder extraction liquid medicine, and the locating lug can be inconsistent with the fixed block, because the chucking piece is the chucking in the chucking inslot, so be difficult for appearing medical personnel and pull out the piston rod and too hard and lead to locating lug and fixed block to collide violently, the condition that the fixed block deviates from the sliding groove has further guaranteed the result of use of cylinder ration extraction liquid medicine, and the use reliability of cylinder obtains improving.

Preferably, the end face of the fixing block, which is far away from the injection port, is provided with anti-skid grains.

Through the technical scheme, the friction coefficient of the end face of the fixing block can be increased by the anti-slip lines, so that the phenomenon of poor force caused by slipping is not easy to occur in the process that medical workers operate the fixing block to extrude the first spring, and the use reliability of the needle cylinder is high.

Preferably, the piston rod is kept away from run through on the terminal surface of injection port and be provided with the mouth that slides, the control lever slide connect in slide the mouth and follow slide the mouth stretch into slide downtheholely, the piston rod is kept away from still set up on the terminal surface of injection port communicate in the locking groove of the mouth that slides, locking Assembly is including sliding the connection in the locking inslot the latch segment and setting up and being in the latch segment with spring two between the locking groove, spring two be used for with the latch segment is pushed slide the mouth and with the control lever is inconsistent.

Through above-mentioned technical scheme, when the sliding distance between locating lug and the fixed block needs to be adjusted, medical personnel can control latch segment extrusion spring two and withdraw in the locking groove, and the slip restriction of control lever is relieved this moment, and medical personnel slidable control lever is in order to adjust the sliding distance between locating lug and the fixed block, further makes the volume of the ration extraction liquid medicine of cylinder obtain adjusting, and the use convenience of cylinder is higher.

Preferably, a rubber block is arranged on the side wall of the locking block, which deviates from the second spring, and the rubber block is used for tightly abutting against the control rod.

Through above-mentioned technical scheme, when spring two pushed the latch segment to the mouth that slides, the rubber block can support tightly in the control lever, and the control lever is more difficult for appearing in the mouth condition of sliding at will in the mouth that slides this moment, so make the syringe in the in-process that uses its service function of quantitative extraction liquid medicine obtain guaranteeing, the use reliability of syringe is higher.

Preferably, a first magnet is embedded in the fixing block, a second magnet is embedded in the positioning bump, and the second magnet and the first magnet are attracted with each other.

Through the technical scheme, when the liquid medicine with the appropriate amount is extracted from the needle cylinder, the piston rod is not easy to slide randomly in the needle cylinder under the attraction effect of the magnet II and the magnet I, so that the situation that the liquid medicine is sprayed out when the needle cylinder is not manually controlled is not easy to occur in the state, and the use reliability of the needle cylinder is further improved.

Preferably, the control rod comprises a positioning section and a spiral section, the spiral section is in threaded connection with the inside of the positioning section, and the positioning convex block is arranged on the side wall of the positioning section.

Through above-mentioned technical scheme, when medical personnel deviate from injection port one side and extract the control lever when reducing the volume of cylinder extraction liquid medicine, rotatable spiral section makes in the spiral section screw in location section, so reducible control lever salient in the length of piston rod for medical personnel operate the cylinder and inject and be difficult for receiving the influence, and the practicality of cylinder is higher.

Preferably, the side wall of the end of the spiral section far away from the positioning section is provided with a flange for a user to hold.

Through above-mentioned technical scheme, the flange can supply medical personnel to grab and hold, so medical personnel can be comparatively laborsaving through rotating in the flange with spiral section screw in location section, the use of cylinder is comparatively convenient.

Preferably, the side wall of the flange is provided with an anti-slip bulge.

Through above-mentioned technical scheme, the phenomenon that skids appears when anti-skidding arch can prevent that medical personnel from rotating the flange, and it is more laborsaving convenient further to make medical personnel rotatory flange make spiral section screw in location section, and the use convenience of cylinder is higher.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a schematic sectional view of the structure of the embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

fig. 5 is an enlarged view of a portion C of fig. 2.

Reference numerals: 1. a needle cylinder; 2. a piston rod; 3. an injection port; 4. a sliding hole; 5. a control lever; 6. positioning the bump; 7. a fixed block; 8. a locking assembly; 9. a sliding groove; 10. a first spring; 11. a clamping groove; 12. a clamping block; 13. anti-skid lines; 14. a sliding port; 15. a locking groove; 16. a locking block; 17. a second spring; 18. a rubber block; 19. a magnet I; 20. a second magnet; 21. a positioning section; 22. a helical section; 23. a flange; 24. anti-skid projections; 25. a piston; 26. a connecting rod.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.

As shown in figure 1, the quantitative injection syringe comprises a syringe 1 and a piston rod 2 which is connected in the syringe 1 in a sealing and sliding way.

As shown in fig. 1 to 5, one end of the syringe 1 has an injection port 3 for drawing a drug solution, and the other end of the syringe 1 is provided with a slide hole 4 into which the piston rod 2 is inserted. The piston rod 2 comprises a piston 25 and a connecting rod 26 fixedly connected with the piston 25, when in use, the end part of the piston rod 2 with the piston 25 is inserted into the sliding hole 4 for sealing sliding, and the connecting rod 26 is held by medical staff to control the sliding of the piston 25 in the needle cylinder 1. The end surface of the connecting rod 26 far away from the injection port 3 is provided with a sliding port 14 in a penetrating way, a control rod 5 is connected in the sliding hole 4 in a sliding way, and the end face is also provided with a locking groove 15 communicated with the sliding port 14, a locking component 8 used for limiting the sliding of the control rod 5 is arranged in the locking groove 15, the locking component 8 comprises a locking block 16 connected in the locking groove 15 in a sliding way and a second spring 17 arranged between the locking block 16 and the locking groove 15, the second spring 17 acts on the elastic force pushing the locking block 16 to one side of the sliding port 14, the side wall of the locking block 16 departing from the second spring 17 is provided with a rubber block 18, when the second spring 17 pushes the locking block 16 to one side of the sliding opening 14, the rubber block 18 will be pressed against the control rod 5 connected in the sliding opening 14 in a sliding manner, therefore, the control rod 5 can be limited from sliding in the sliding opening 14, and the control rod 5 can be driven to be pulled out together from one side of the injection opening 3 in the process of pulling out the piston rod 2 from one side of the injection opening 3.

And the syringe 1 is provided with the groove 9 that slides that communicates in the hole 4 that slides on keeping away from the terminal surface of injection port 3, be provided with chucking groove 11 on the lateral wall of groove 9 that slides, it is connected with fixed block 7 to slide in the groove 9 that slides, and have chucking and the chucking piece 12 of connection in chucking groove 11 that slides on the lateral wall of fixed block 7, it is worth noting that chucking piece 12 chucking is in chucking groove 11 and is meant that the clearance between chucking piece 12 and chucking groove 11 is less, nevertheless do not cause the influence to the slip of chucking piece 12 in chucking groove 11 and the slip of fixed block 7 in groove 9 that slides. Be provided with spring 10 between the lateral wall of fixed block 7 and groove 9 that slides, spring 10 is used for having the elasticity that pushes fixed block 7 into in the hole 4 that slides, the lateral wall department that is located the hole 4 that slides of control lever 5 is provided with location lug 6, so when piston rod 2 drives control lever 5 and deviates from injection port 3 one side together and extracts, location lug 6 can be inconsistent with fixed block 7 and make the volume of syringe 1 extraction liquid medicine obtain controlling, medical personnel can adjust the sliding distance between location lug 6 and the fixed block 7 through slide control lever 5 according to the liquid medicine injection volume that the bacterin suits from this quantity of syringe 1 extraction liquid medicine. The end face, deviating from the injection port 3, of the fixing block 7 is provided with the anti-slip threads 13, and the anti-slip threads 13 can increase the friction coefficient of the end face of the fixing block 7, so that the phenomenon of poor force caused by slipping is not easy to occur in the process that medical staff operate the fixing block 7 to extrude the first spring 10.

The embedded magnet 19 that is equipped with of fixed block 7, and the embedded magnet two 20 that is equipped with of locating lug 6, set up to attract mutually between magnet two 20 and the magnet 19, when piston rod 2 deviates from injection port 3 one side and extracts and has the liquid medicine of sufficient, locating lug 6 and fixed block 7 can attract mutually under the effect of magnet two 20 and magnet one 19, so make the difficult gliding condition of appearing in syringe 1 of piston rod 2, make syringe 1 under this state difficult appear the liquid medicine spun condition when the non-artificial is controlled. And control lever 5 includes location section 21 and spiral section 22, and spiral section 22 slides and connects in sliding opening 14 and threaded connection in location section 21, and location lug 6 sets up in the lateral wall department of location section 21, so when medical personnel deviate from injection port 3 one side and extract control lever 5 in order to reduce the volume that syringe 1 extracted the liquid medicine, the injection operation of syringe 1 can be influenced to control lever 5 of protrusion in piston rod 2, causes the inconvenience in the use. At this time, the spiral section 22 can be rotated to screw the spiral section 22 into the positioning section 21, so that the length of the control rod 5 protruding out of the piston rod 2 can be reduced, and the medical staff can not be affected easily when operating the syringe 1 to inject.

The side wall of the end of the spiral section 22 far away from the positioning section 21 is provided with a flange 23 for the user to hold, and the side wall of the flange 23 is provided with a skidproof bump 24. The flange 23 can supply medical personnel to grab and hold for medical personnel can be comparatively laborsaving through rotating the flange 23 with spiral section 22 screw in location section 21 in, and the phenomenon of skidding appears when medical personnel rotate flange 23 in the non-slip raised 24 can prevent, makes medical personnel rotatory flange 23 control spiral section 22 screw in location section 21 more laborsaving convenient.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. The utility model provides a ration injection cylinder, includes cylinder (1) and sealed connection of sliding piston rod (2) in cylinder (1), the one end of cylinder (1) has injection mouth (3), the other end of cylinder (1) is provided with the confession piston rod (2) male hole (4) that slide, characterized by: the injection device is characterized in that a control rod (5) is connected to the end face of the piston rod (2) in a sliding mode, a positioning lug (6) is arranged on the side wall of the control rod (5), a fixing block (7) is arranged on the inner wall of the needle cylinder (1), the control rod (5) slides along the length direction of the needle cylinder (1), when the piston rod (2) deviates from one side of the injection port (3) and is pulled out, the positioning lug (6) is abutted to the fixing block (7), a locking assembly (8) is arranged between the control rod (5) and the piston rod (2), and the locking assembly (8) is used for fixing the relative position of the control rod (5) and the piston rod (2).

2. A dosing syringe as claimed in claim 1, characterised in that: the needle cylinder (1) is far away from the end face of the injection port (3) and is provided with a sliding groove (9) communicated with the sliding hole (4), the fixing block (7) is connected in the sliding groove (9) in a sliding mode, a first spring (10) is arranged between the fixing block (7) and the sliding groove (9), and the first spring (10) is used for pushing the fixing block (7) into the sliding hole (4).

3. A dosing syringe as claimed in claim 2, characterised in that: the clamping groove (11) is formed in the side wall of the sliding groove (9), the clamping block (12) is arranged on the side wall of the fixing block (7), and the clamping block (12) is connected to the clamping groove (11) in a sliding mode.

4. A dosing syringe as claimed in claim 2, characterised in that: the end face, deviating from the injection port (3), of the fixing block (7) is provided with anti-skid grains (13).

5. A dosing syringe as claimed in claim 1, characterised in that: the piston rod (2) is far away from run through on the terminal surface of injection port (3) and be provided with mouth (14) that slides, control lever (5) slide connect in slide mouth (14) and follow slide mouth (14) stretch into in sliding hole (4), piston rod (2) are far away from still set up on the terminal surface of injection port (3) communicate in slide mouth (14) locking groove (15), locking Assembly (8) are including sliding connect in latch segment (16) in locking groove (15) and setting are in latch segment (16) with spring two (17) between locking groove (15), spring two (17) are used for with latch segment (16) are pushed to slide mouth (14) and with control lever (5) are inconsistent.

6. A dosing syringe as claimed in claim 5, characterised in that: and a rubber block (18) is arranged on the side wall of the locking block (16) departing from the second spring (17), and the rubber block (18) is used for abutting against the control rod (5).

7. A dosing syringe as claimed in claim 2, characterised in that: the embedded magnet (19) that is equipped with of fixed block (7), the embedded magnet two (20) that is equipped with of locating convex block (6), magnet two (20) with set up to attracting each other between magnet (19).

8. A dosing syringe as claimed in claim 7, characterised in that: the control rod (5) comprises a positioning section (21) and a spiral section (22), the spiral section (22) is in threaded connection with the inside of the positioning section (21), and the positioning lug (6) is arranged on the side wall of the positioning section (21).

9. A dosing syringe as claimed in claim 8, characterised in that: the side wall of the end part of the spiral section (22) far away from the positioning section (21) is provided with a flange (23) for a user to grasp.

10. A dosing syringe as claimed in claim 9, characterised in that: and the side wall of the flange (23) is provided with an antiskid projection (24).