CN214129778U

CN214129778U - Medical syringe

Info

Publication number: CN214129778U
Application number: CN202021920630.8U
Authority: CN
Inventors: 胡敏; 张红卫; 雷金菊; 其他发明人请求不公开姓名
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-09-07
Anticipated expiration: 2030-09-04

Abstract

The utility model discloses a medical injector, which belongs to the field of medical instruments. The inner part of the cylinder is provided with an accommodating cavity, the cover body is in threaded connection with the outer side wall of the cylinder, the inner side wall of the cylinder is slidably connected with a first piston, the upper end of the first piston is fixedly connected with a piston rod, and the piston rod is in dynamic sealing connection with the cover body; the lower extreme of barrel is provided with the syringe needle, first spout has been seted up on the lateral wall of barrel, first air flue and second air flue have been seted up to the inside of barrel, the second check valve through connection to the second air flue that passes through of first air flue, second air flue through connection to holds the chamber, second slider slidable ground is connected to first spout, second piston slidable ground is connected to first air flue, when stopper position is fixed, press and push away the handle and impress the first air flue with the second piston, the air that the volume is fixed gets into the second air flue via the second check valve, impress first piston rod downwards, the operating personnel of being convenient for carries out quick ration injection.

Description

Medical syringe

Technical Field

The utility model relates to the field of medical equipment, in particular to medical injector.

Background

The medical injector usually comprises an injection tube and an injection push rod arranged in the injection tube, wherein the end part of the injection push rod is provided with a rubber plug, the periphery of the rubber plug is propped against the inner tube wall of the injection tube, the end part of the injection tube is provided with an injection needle, and the injection can be sucked into the injection tube or sprayed out from the injection needle by pushing and pulling the injection tube.

In large-scale animal breeding fields such as pig cattle, sheep and horse, also need regular vaccine immunity and disease drug therapy, but large-scale animal body is big, strength is big and be difficult to be close, operating personnel when carrying out intramuscular injection to the livestock, operating personnel need extra assistant to assist the control livestock, especially during injection pushes away the medicine, traditional syringe pushes away the unable rapid injection of medicine process and guarantees the injection volume, arouse the frightening of livestock easily, thereby to operating personnel, livestock and medical equipment cause the damage, and usually need big injection in proper order in batches to the injection of livestock, consequently use traditional syringe to waste time and energy, work efficiency is low.

Therefore, a quick medical injector for animals, which is convenient for controlling the injection quantity, is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a medical injector which can solve the problem that the injector in the prior art can not inject quantitative liquid medicine quickly.

A medical injector comprising a barrel, a needle, a cap, a first piston, and a second slider, wherein:

the utility model discloses a medical liquid medicine container, including barrel, lid, first piston, piston rod, the inside cavity of holding has been seted up to the barrel, hold the cavity follow the upper end of barrel link up to the external world, the lid with barrel lateral wall threaded connection, the lid is used for sealing hold the cavity, the inside wall slidable of barrel is connected with first piston, first piston will hold the cavity and seal and cut apart into two parts, be located first piston top hold the cavity be the air chamber, be located first piston below hold the cavity and be the liquid medicine room, the upper end fixedly connected with piston rod of first piston, the upper end of piston rod is run through the lid extends to the external world, the piston rod with slidable between the lid, the piston rod with lid dynamic seal connects:

the lower extreme of barrel is provided with the syringe needle, the syringe needle through connection to the liquid medicine room:

the outer side wall of the cylinder body is provided with a first sliding groove, a first air passage and a second air passage are formed in the cylinder body, the upper end of the first air passage is connected to the first sliding groove in a penetrating mode, the lower end of the first air passage is connected to one end of the second air passage in a penetrating mode through a second one-way valve, the other end of the second air passage is connected to the containing cavity in a penetrating mode at the upper end of the cylinder body, outside air is communicated to the first air passage through the first one-way valve arranged at the lower end of the first air passage, the second sliding block is connected to the first sliding groove in a sliding mode, the lower end of the second sliding block is fixedly connected with a connecting rod, the lower end of the connecting rod is fixedly connected with a second piston, the second piston is connected to the first air passage in a sliding mode, and the second piston is connected with the first air passage in a dynamic sealing mode.

Preferably, the upper end lateral wall fixedly connected with of first piston steps down the platform, the upper end cross sectional area of stepping down the platform is less than the lower extreme cross sectional area of stepping down the platform.

Preferably, the needle cylinder is fixedly connected to the lower end of the cylinder body, the needle cylinder is provided with a needle accommodating cavity, the needle accommodating cavity is connected to the liquid medicine chamber in a penetrating manner, the lower end of the needle cylinder is rotatably connected with the rotary drum, the rotary drum is in movable sealing connection with the needle cylinder, the rotary drum and the needle cylinder are coaxially arranged, the needle head comprises a base and an injection needle, the injection needle is fixedly connected to the base, the base can slide in the needle accommodating cavity, a through hole which is vertically communicated is formed in the rotary drum, the through hole and the needle accommodating cavity are coaxially arranged in an equal cross section manner, the side wall of the through hole is provided with full threads, the outer surface of the base is provided with full threads, the outer threads of the base are in threaded connection with the inner threads of the rotary drum, and the inner side wall of the needle cylinder is provided with a guide groove, the outer side wall of the base is fixedly connected with a first sliding block, the first sliding block is connected to the inside of the guide groove in a sliding mode, and the base is connected with the rotary drum in a dynamic sealing mode.

Preferably, the upper end of the second sliding block is fixedly connected with a return spring, and the upper end of the return spring is fixedly connected to the first sliding groove.

Preferably, the outer side wall of the second sliding block is fixedly connected with a push handle.

Preferably, the limiting block is located below the second sliding block, the limiting block is connected to the first sliding groove in a sliding mode, a screw is fixedly connected to the limiting block, a nut is connected to the screw in a threaded mode, and the screw is matched with the nut and used for fixing the position of the limiting block in the first sliding groove.

Preferably, the outer side wall of the cylinder body on two sides of the first sliding groove is provided with scales.

Has the advantages that: the utility model provides a pair of medical injector, through pressing push away the handle and impress first air flue with the second piston, make the air get into the second air flue via the second check valve, and enter the air chamber, impress first piston rod downwards, when stopper position is fixed, press at every turn and push away handle to stopper, the second piston stroke is fixed, the air volume of impressing is fixed, the operating personnel of being convenient for carries out quick ration injection, push away the effect return of second slider through reset spring after the medicine ends, push away the handle return, the air gets into first air flue via first check valve, prepare for injection next time:

and the rotating drum can drive the base to move, so that the length of the injection needle extending out of the rotating drum is adjusted, and the intramuscular injection with fixed depth is facilitated.

Drawings

Fig. 1 is a schematic structural view of a medical injector provided by the utility model:

fig. 2 is the schematic view of the cross-sectional structure of the medical injector provided by the utility model:

FIG. 3 is a schematic cross-sectional view taken along line A-A in FIG. 2:

fig. 4 is a schematic structural view of the first piston in fig. 2:

fig. 5 is a schematic structural diagram of the limiting block in fig. 2.

Description of reference numerals:

1-cylinder, 11-first chute, 12-first air passage, 13-first one-way air valve, 14-second one-way air valve, 15-second air passage, 16-scale, 2-needle containing cylinder, 21-guide groove, 3-rotating cylinder, 4-base, 41-first slide block, 5-injection needle, 6-cover, 7-first piston, 71-piston rod, 72-abdicating table, 8-second slide block, 81-pushing handle, 82-reset spring, 83-connecting rod, 84-second piston, 9-limiting block 91-screw and 92-nut.

Detailed Description

In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.

Specific example 1:

as shown in fig. 1 to 5, an embodiment of the present invention provides a medical injector, including a cylinder 1, a needle, a cover 6, a first piston 7, a second slider 8 and a stopper 9, wherein:

barrel 1 is inside to be seted up and to hold the chamber, it link up to the external world to hold the chamber from barrel 1's upper end,

lid

6 and 1 lateral wall threaded connection of barrel, lid 6 is used for the sealed chamber that holds, barrel 1's inside wall slidable ground is connected with first piston 7, first piston 7 will hold the chamber and seal and cut apart into two parts, the chamber that holds that is located first piston 7 top is the air chamber, the chamber that holds that is located first piston 7 below is the liquid medicine chamber, the upper end fixedly connected with piston rod 71 of first piston 7, the upper end of piston rod 71 runs through lid 6 and extends to the external world, slidable between piston rod 71 and the lid 7, piston rod 71 and the lid 6 move sealing connection, the upper end lateral wall fixedly connected with of first piston 7 steps down platform 72, the upper end cross sectional area of stepping down platform 72 is less than the lower extreme cross sectional area of stepping down platform 72:

the lower extreme of barrel 1 is provided with the syringe needle, and the syringe needle through connection is to the liquid medicine room:

the outer side wall of the cylinder body 1 is provided with a first chute 11, the interior of the cylinder body 1 is provided with a first air passage 12 and a second air passage 15, the upper end of the first air passage 12 is connected to the first chute 11 in a penetrating way, the lower end of the first air passage 12 is connected to one end of the second air passage 15 in a penetrating way through a second one-way valve 14, the other end of the second air passage 15 is connected to the accommodating cavity at the upper end of the cylinder body 1 in a penetrating way, the outside air is communicated to the first air passage 12 through a first one-way valve 13 arranged at the lower end of the first air passage, the second slider 8 is connected to the first chute 11 in a sliding way, the lower end of the second slider 8 is fixedly connected with a connecting rod 83, the lower end of the connecting rod 83 is fixedly connected with a second piston 84, the second piston 84 is connected to the first air passage 12 in a sliding way, the second piston 84 is connected with the first air passage 12 in a dynamic sealing way, the upper end of the second slider 8 is fixedly connected with a return spring 82, the upper end of the return spring 82 is fixedly connected to the first chute, 11 the outer side wall of the second sliding block 8 is fixedly connected with a push handle 81:

stopper 9 is located the below of second slider 8, and stopper 9 slidable ground is connected to first spout 11, fixedly connected with screw rod 91 on the stopper 9, and screw rod 91 threaded connection has nut 92, and screw rod 91 is used for fixed stopper 9 in the position of first spout 11 with the cooperation of nut 92:

the outer side wall of the cylinder 1 at both sides of the first sliding chute 11 is provided with a scale 16.

When using the device, open lid 6 in advance, fill into the liquid medicine in holding the chamber, first piston 7 packs into and holds the air that holds the chamber and discharge the liquid medicine chamber, because be provided with the platform 72 of stepping down on first piston 7, and the piston pushes down among the exhaust air process, consequently first piston 7 can not block up the intercommunicating pore of second air flue 15 with the air chamber, screw up lid 6 after the readiness and seal, and adjust the position of stopper 9 according to 16 scales for the reference, the adjustment back that finishes, screw up nut 92, nut 92 pulling screw rod makes stopper 9 lock on first spout 11:

when injection is carried out, a needle head is pricked into a designated position, the push handle 81 is pushed to drive the second sliding block 8 to move downwards, the connecting rod 83 pushes the second piston 84 to be pressed into the first air passage 12, air is pressed into the second air passage 15 through the second one-way valve 14 and enters the air chamber, the air pressure pushes the first piston rod to move downwards to the volume equal to that of the air, quantitative injection is realized, after the injection is finished, the push handle 81 is loosened, the reset spring 82 pulls the second sliding block 8, the connecting rod 83 and the second jojoba 84 to return, and outside air enters the first air passage 12 through the first one-way valve 13 to prepare for the next injection.

Specific example 2:

in embodiment 1, because the needle head during injection is generally easily damaged, and the injection depth during intramuscular injection is controlled by the subjective of the operator, the ideal injection depths of different livestock are different, which is very inconvenient for the operator, if the appropriate needle head is replaced, frequent replacement easily causes the operator to be injured accidentally, and in order to realize convenient adjustment of the injection depth, on the basis of embodiment 1, as shown in fig. 1 to 5, the embodiment further comprises a needle containing cylinder 2 and a rotary drum 3, the needle containing cylinder 2 is fixedly connected to the lower end of the cylinder body 1, the needle containing cylinder 2 is provided with a needle containing cavity, the needle containing cavity is connected to a liquid medicine chamber in a penetrating way, the lower end of the needle containing cylinder 2 is rotatably connected with the rotary drum 3, the rotary drum 3 is connected with the needle containing cylinder 2 in a movable sealing manner, the rotary drum 3 is arranged coaxially with the needle containing cylinder 2, the needle head comprises a base 4 and an injection needle 5, the injection needle 5 is fixedly connected to the base 4, base 4 can slide holding the needle intracavity, the through-hole that link up from top to bottom is seted up to the inside of rotary drum 3, the through-hole sets up with holding the coaxial uniform cross section in needle chamber, the full thread has been seted up on the lateral wall of through-hole, the full thread has been seted up to the surface of base 4, the external screw thread of base 4 and the internal thread threaded connection of rotary drum 3, hold and seted up guide way 21 on the 2 inside walls of cylinder, first slider 41 of fixedly connected with on the lateral wall of base 4, first slider 41 slidable ground is connected to in the guide way 21, base 4 and rotary drum 3 move sealing connection.

When the length of the injection needle 5 extending out of the drum 3 needs to be adjusted, the drum 3 is rotated, the first sliding block 41 on the base 4 moves along the guide groove 21, and the base 4 is in threaded connection with the drum 3, so that the injection needle 5 can change the length of the extending out of the drum 3, and the injection is convenient for an operator.

The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the embodiments, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.

Claims

1. A medical injector, characterized by comprising a barrel (1), a needle, a cap (6), a first piston (7) and a second slider (8), wherein:

an accommodating cavity is formed in the cylinder body (1), the accommodating cavity is communicated with the outside from the upper end of the cylinder body (1), the cover body (6) is in threaded connection with the outer side wall of the cylinder body (1), the cover body (6) is used for sealing the accommodating cavity, the inner side wall of the cylinder body (1) is connected with the first piston (7) in a sliding way, the first piston (7) divides the containing cavity into two parts in a sealing way, the containing cavity positioned above the first piston (7) is an air chamber, the containing cavity positioned below the first piston (7) is a liquid medicine chamber, the upper end of the first piston (7) is fixedly connected with a piston rod (71), the upper end of the piston rod (71) penetrates through the cover body (6) and extends to the outside, the piston rod (71) and the cover body (6) can slide, and the piston rod (71) is connected with the cover body (6) in a dynamic sealing manner:

the lower extreme of barrel (1) is provided with the syringe needle, the syringe needle through connection to the liquid medicine room:

the outer side wall of the cylinder body (1) is provided with a first sliding groove (11), a first air passage (12) and a second air passage (15) are formed in the cylinder body (1), the upper end of the first air passage (12) is connected to the first sliding groove (11) in a penetrating manner, the lower end of the first air passage (12) is connected to one end of the second air passage (15) in a penetrating manner through a second one-way valve (14), the other end of the second air passage (15) is connected to the accommodating cavity in a penetrating manner at the upper end of the cylinder body (1), outside air is communicated to the first air passage (12) through a first one-way valve (13) arranged at the lower end of the first air passage, the second sliding block (8) is connected to the first sliding groove (11) in a sliding manner, the lower end of the second sliding block (8) is fixedly connected with a connecting rod (83), and the lower end of the connecting rod (83) is fixedly connected with a second piston (84), the second piston (84) is slidably connected to the first air passage (12), and the second piston (84) is in dynamic sealing connection with the first air passage (12).

2. The medical injector according to claim 1, wherein a yield table (72) is fixedly connected to the upper end side wall of the first piston (7), and the cross-sectional area of the upper end of the yield table (72) is smaller than the cross-sectional area of the lower end of the yield table (72).

3. The medical injector according to claim 1, further comprising a needle containing cylinder (2) and a rotary drum (3), wherein the needle containing cylinder (2) is fixedly connected to the lower end of the barrel body (1), the needle containing cylinder (2) is provided with a needle containing cavity, the needle containing cavity is connected to the liquid medicine chamber in a penetrating manner, the rotary drum (3) is rotatably connected to the lower end of the needle containing cylinder (2), the rotary drum (3) is connected with the needle containing cylinder (2) in a movable sealing manner, the rotary drum (3) is arranged coaxially with the needle containing cylinder (2), the needle head comprises a base (4) and an injection needle (5), the injection needle (5) is fixedly connected to the base (4), the base (4) can slide in the needle containing cavity, the rotary drum (3) is internally provided with a through hole which is communicated up and down, the through hole is arranged coaxially with the needle containing cavity in an equal section manner, the side wall of the through hole is provided with full threads, the outer surface of the base (4) is provided with full threads, external threads of the base (4) are in threaded connection with internal threads of the rotary drum (3), the inner side wall of the needle containing cylinder (2) is provided with a guide groove (21), the outer side wall of the base (4) is fixedly connected with a first sliding block (41), the first sliding block (41) is connected to the guide groove (21) in a sliding mode, and the base (4) is in dynamic sealing connection with the rotary drum (3).

4. A medical injector according to claim 1, characterized in that a return spring (82) is fixedly connected to the upper end of the second slider (8), the upper end of the return spring (82) being fixedly connected to the first runner (11).

5. A medical injector according to claim 1, characterized in that a push handle (81) is fixedly attached to the outer side wall of the second slider (8).

6. The medical injector according to claim 1, further comprising a stopper (9), wherein the stopper (9) is located below the second slider (8), the stopper (9) is slidably connected to the first sliding groove (11), a screw (91) is fixedly connected to the stopper (9), a nut (92) is threadedly connected to the screw (91), and the screw (91) and the nut (92) are matched to fix the position of the stopper (9) in the first sliding groove (11).

7. A medical injector according to claim 1, characterized in that the outer side wall of the barrel (1) on both sides of the first runner (11) is provided with a scale (16).