CN216022487U

CN216022487U - Double-tube syringe

Info

Publication number: CN216022487U
Application number: CN202122260762.3U
Authority: CN
Inventors: 胡超祎; 李国庆; 黄璐; 唐芬芬; 陈汶
Original assignee: Second Hospital University Of South China
Current assignee: Second Hospital University Of South China
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-03-15
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a double-tube injector, which comprises an outer barrel, a first needle cylinder and a second needle cylinder, wherein the first needle cylinder and the second needle cylinder are arranged in the outer barrel side by side; the bottom of the outer cylinder is provided with a rotating shaft, and the first needle cylinder and the second needle cylinder can axially rotate in the outer cylinder by taking the rotating shaft as an axis; the outer cylinder is provided with a conversion positioning device for driving the first needle cylinder and the second needle cylinder to rotate; the bottom parts of the first needle cylinder and the second needle cylinder are respectively provided with a first injection port and a second injection port, and the first injection port and the second injection port have the same movement track at the bottom part of the outer cylinder; an injection port for mounting a needle head is formed at the bottom of the outer cylinder, and the injection port can be respectively aligned with the first injection port and the second injection port; sealing films are respectively arranged on the first injection port and the second injection port; piston push rods are arranged in the first needle cylinder and the second needle cylinder. During operation, the bottom injection port of the two needle cylinders is aligned with the injection port of the outer cylinder by rotating the two needle cylinders, so that two medicaments can be injected at one time without replacing the injector, and the device is simple in structure and convenient to operate.

Description

Double-tube syringe

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a double-tube syringe.

Background

In clinical application, an injector used by medical workers is usually of a single-tube type, the end part of a needle tube is provided with a needle head, the interior of the needle tube is provided with a piston and a push rod, and the needle head is provided with a needle head sleeve; when the patient finishes the injection, the nurse needs the other hand to quickly take out the cotton ball, lightly presses the cotton ball on the needle eye part of the needle head, and then quickly pulls out the needle head, so that the two hands are needed to quickly cooperate to finish the action; however, medical staff who is not skilled in movement sometimes feels busy and disorderly, and when a patient needs to inject a large amount of liquid medicine or two different kinds of liquid medicine, the needle tube and the needle head need to be replaced again to suck the liquid medicine, so that the use and the operation are somewhat inconvenient, especially in clinical rescue, the time is precious, and the time for replacing the injector and re-injecting sometimes delays the rescue time. In addition, a large number of temporary square bin inoculation points and articles prepared during inoculation of the mobile vaccine vehicle are not complete, adhesive plaster application is not uniform, adhesive plaster application is not firm after sweat soaking, inoculation seasons change or the work links and working links of inoculated people are different, and a large number of inoculated people cannot keep the inoculation points dry and clean strictly according to requirements, so that the infection risk exists. After the injection is finished, the conventional injection needle needs to be sleeved with a protective needle cap again, or medical waste is classified and recycled after the needle and the needle tube are separated, so that medical exposure risks exist.

To this end, chinese patent (CN204543140U) discloses a double-barreled syringe, which comprises a syringe, wherein a protrusion is provided at the lower end of the syringe for connecting a needle, a middle partition plate is provided in the inner cavity of the syringe for dividing the syringe into a first syringe and a second syringe which are uniformly equal, a piston and a push rod are respectively provided in the first syringe and the second syringe, a movable valve ring is provided between the syringe and the protrusion, the movable valve ring is divided into an upper layer and a lower layer, a blocking piece which has the same diameter as the first syringe and the second syringe is provided on the upper layer of the movable valve ring, the lower layer is directly communicated with the protrusion at the lower end of the syringe, and a cotton ball ring is provided on the outer side of the overlapping part of the upper end of the needle and the protrusion. Compared with the prior art, the device has the advantages that the device is compact in design, can be used for injecting two kinds of medicines at one time without replacing the injector, and the cotton ball ring is arranged on the needle head of the injector, so that the injection can be finished, the operation steps of medical workers are simplified, and the use is convenient.

Meanwhile, the chinese patent (CN105727401A) discloses a double-barrelled dual-channel syringe and a needle, which includes a needle tube, the front end of the needle tube is provided with a needle, along the length direction, the needle tube is provided with a first partition board therein, the needle tube is divided into a first cavity and a second cavity by the first partition board, the first cavity is provided with a first piston therein, the first piston is provided with a first piston handle, the second cavity is provided with a second piston therein, the second piston is connected with a second piston handle, the second piston handle is arranged outside the second cavity; along the length direction, the needle head is divided into a third cavity and a fourth cavity through a second partition plate, and the third cavity is communicated with the first cavity; the fourth cavity is communicated with the second cavity. Compared with the prior art, the design that the needle head is inserted into the same blood vessel through the separation of the first cavity and the second cavity realizes that the injection of hyaluronic acid and the blood withdrawal are relatively independent, the blood vessel embolism of the most serious complication of hyaluronic acid injection is effectively avoided, the hyaluronic acid injection can be effectively and safely carried out, and doctors and patients can be injected more safely.

However, in both solutions, one syringe is divided into two parts, the structure molding is complex, the cost is too high, and especially, the double-tube double-channel syringe and the needle disclosed in the chinese patent (CN105727401A) need to be divided into two parts, and the manufacturing process requirement is too high.

Therefore, there is a need for an improved structure of the prior art, and a double syringe with a simple structure, which can inject two kinds of medicine at a time without replacing the syringe.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems and provides a double-tube injector which is simple in structure and convenient to operate by improving the structural design and can inject two kinds of medicines at one time without replacing the injector.

In order to achieve the purpose, the utility model provides the following scheme:

provided is a double syringe including an outer cylinder, and a first cylinder and a second cylinder which are arranged side by side inside the outer cylinder; the bottom of the outer cylinder is provided with a rotating shaft, and the first needle cylinder and the second needle cylinder can axially rotate in the outer cylinder by taking the rotating shaft as an axis; the outer cylinder is provided with a conversion positioning device for driving the first needle cylinder and the second needle cylinder to rotate; the bottom parts of the first needle cylinder and the second needle cylinder are respectively provided with a first injection port and a second injection port, and the first injection port and the second injection port have the same movement track at the bottom part of the outer cylinder; an injection port for mounting a needle head is formed at the bottom of the outer cylinder, and the injection port can be respectively aligned with the first injection port and the second injection port; sealing films are respectively arranged on the first injection port and the second injection port; piston push rods are arranged in the first needle cylinder and the second needle cylinder.

Preferably, a baffle plate used for limiting the radial movement of the first syringe and the second syringe is arranged inside the outer barrel, a through hole corresponding to the injection port is formed in the baffle plate, and the through hole is used for inserting the piston push rod into the first syringe or the second syringe.

Preferably, the conversion positioning device comprises an opening formed in the circumferential direction on the wall of the outer cylinder and a protrusion arranged on the wall of the first needle cylinder or the second needle cylinder corresponding to the opening; the bulge extends out of the outer cylinder through the opening, and after the bulge slides from one end of the opening to the other end of the opening, the first injection port corresponding to the injection port is converted into the second injection port, or the second injection port corresponding to the injection port is converted into the first injection port.

Preferably, the conversion positioning device comprises an annular groove formed in the bottom of the outer barrel; the injection device comprises a first needle cylinder, a second needle cylinder, a first sliding sheet, a second sliding sheet, a limiting sheet and a second sliding sheet, wherein the limiting sheet is arranged in the annular groove, the bottom of the first needle cylinder and the bottom of the second needle cylinder are respectively provided with the first sliding sheet and the second sliding sheet, the first sliding sheet and the second sliding sheet slide in the annular groove along with the rotation of the first needle cylinder and the second needle cylinder, when the first sliding sheet is in contact with the limiting sheet, the first injection port is aligned with the injection port, and when the second sliding sheet is in contact with the limiting sheet, the second injection port is aligned with the injection port.

Preferably, the rotating shaft comprises a fixed shaft and a rotating sleeve, and the rotating sleeve is sleeved on the fixed shaft and rotates on the fixed shaft; the fixed shaft is fixed at the center of the bottom of the outer cylinder, and the rotating sleeve is respectively connected with the first needle cylinder and the second needle cylinder.

Preferably, the swivel sleeve is higher than the outer barrel.

Preferably, the piston push rod comprises a piston and a push rod which are arranged separately, the piston is respectively arranged in the first needle cylinder and the second needle cylinder, and the push rod is used for pushing the piston.

Preferably, the first injection port and the second injection port are provided with edges on the sides facing the injection ports, which edges can be snapped into the injection ports.

Compared with the prior art, the utility model has the following technical effects:

(1) the utility model adopts the technical scheme that the two needle cylinders are independently arranged in the outer cylinder, so that the bottom injection port of the two needle cylinders is aligned with the injection port of the outer cylinder by rotating the two needle cylinders in the operation process, the two medicaments can be injected at one time without replacing the injector, and the utility model has simple structure and convenient operation.

(2) The utility model adopts the design of the split type piston and the push rod, so that the push rod can be switched on the pistons of different syringes, the whole injector can complete the injection of two syringes by only one push, the piston push rod is not required to be arranged on each syringe, the structure is evolved, and the operation is convenient.

(3) The structure design of the baffle plate with holes is further arranged in the outer barrel, wherein the through holes in the baffle plate correspond to the injection ports, and the baffle plate can effectively limit the first needle cylinder and the second needle cylinder to move in the radial direction; through the setting of through-hole, make its piston push rod can be effectively restricted horizontal hunting, make the injection process more steady.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

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

FIG. 2 is a perspective view of a structure according to an embodiment of the present invention;

FIG. 3 is a front view of a second alternative positioning apparatus according to the present invention;

fig. 4 is a top view of a second converting positioning device according to an embodiment of the present invention.

Wherein, 1-outer cylinder, 11-injection port, 12-opening, 13-projection, 14-annular groove, 15-spacing piece; 2-first syringe, 21-first injection port, 22-first sliding sheet; 3-second syringe, 31-second injection port, 32-second sliding sheet; 4-rotating shaft, 41-fixed shaft and 42-rotating sleeve; 5-piston push rod, 51-push rod, 52-piston; 6-baffle, 61-through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model aims to provide a double-tube syringe, which has a simple structure and convenient operation by improving the structural design, and can realize the injection of two medicaments at one time without replacing the syringe.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The first embodiment is as follows:

as shown in fig. 1 and fig. 2, the present embodiment provides a double syringe, which comprises an outer barrel 1 and a first syringe 2 and a second syringe 3 arranged side by side inside the outer barrel 1, wherein the first syringe 2 and the second syringe 3 may be lower than the outer barrel 1, may be higher than the outer barrel 1, or may be flush with the outer barrel 1; in the present embodiment, the first cylinder 2 and the second cylinder 3 are selected to be lower than the outer cylinder 1.

A rotating shaft 4 is arranged at the bottom of the outer cylinder 1, and the first needle cylinder 2 and the second needle cylinder 3 can axially rotate in the outer cylinder 1 by taking the rotating shaft 4 as an axis; the rotating shaft 4 has various forms, and can include a fixed shaft 41 and a rotating sleeve 42, wherein the rotating sleeve 42 is sleeved on the fixed shaft 41 and rotates on the fixed shaft 41; the fixed shaft 41 is fixed at the center of the bottom of the outer cylinder 1, and the rotating sleeve 42 is respectively connected with the first needle cylinder 2 and the second needle cylinder 3; or only one rotating shaft is needed, one end of the rotating shaft is connected with a rotating hole arranged in the center of the bottom of the outer cylinder 1, and the rotating shaft rotates in the rotating hole and is respectively connected with the first needle cylinder 2 and the second needle cylinder 3; in the present embodiment, the rotating shaft 4 including the fixed shaft 41 and the rotating sleeve 42 is selected. The outer cylinder 1 is also provided with a switching positioning device for driving the first needle cylinder 2 and the second needle cylinder 3 to rotate.

The first injection port 21 and the second injection port 31 are respectively formed at the bottom of the first syringe 2 and the second syringe 3, the movement trajectories of the first injection port 21 and the second injection port 31 at the bottom of the outer cylinder 1 are the same, it should be noted that the movement trajectories of the first injection port 21 and the second injection port 31 at the bottom of the outer cylinder 1 are the same, it is not necessarily meant that the movement trajectories of the first injection port 21 and the second injection port 31 at the bottom of the outer cylinder 1 are completely overlapped, and according to actual requirements, the situation that the calibers of the first injection port 21 and the second injection port 31 are different is allowed to exist. An injection port 11 for mounting a needle is formed at the bottom of the outer cylinder 1, and the injection port 11 can be respectively aligned with the first injection port 21 and the second injection port 31; it should be noted that, in order to make the liquid medicine enter the injection port 11 from the first injection port 21 or the second injection port 31 more smoothly, the aperture of the first injection port 21 and the second injection port 31 does not exceed the aperture of the injection port 11.

Sealing films are respectively arranged on the first injection port 21 and the second injection port 31; piston push rods 5 are arranged in the first needle cylinder 2 and the second needle cylinder 3; by pressing the piston rod 5, the medical fluid in the first syringe 2 or the second syringe 3 is compressed and broken by the sealing film, and enters the injection port 11 through the first injection port 21 or the second injection port 31.

Further, a baffle 6 is arranged in the outer cylinder 1, a through hole 61 corresponding to the injection port 11 is formed in the baffle 6, and the through hole 61 is used for inserting the piston push rod 5 into the first needle cylinder 2 or the second needle cylinder 3; the baffle 6 is arranged to effectively limit the radial movement of the first needle cylinder 2 and the second needle cylinder 3 (the scheme shown in figure 1 is that the baffle 6 effectively limits the radial movement of the rotating shaft 4, and the first needle cylinder 2 and the second needle cylinder 3 are fixed on the rotating shaft 4, so that the radial movement of the first needle cylinder 2 and the second needle cylinder 3 is limited; through the arrangement of the through hole 61, the piston push rod 5 can be effectively limited to swing transversely, and the injection process is more stable.

Further, the conversion positioning device comprises an opening 12 which is annularly arranged on the wall of the outer cylinder 1 and a bulge 13 which is arranged on the wall of the first needle cylinder 2 or the second needle cylinder 3 corresponding to the opening 12; wherein, the bulge 13 extends out of the outer cylinder 1 through the opening 12, and the bulge 13 can be provided with anti-skid grains; during operation, the protrusion 13 slides from one end of the opening 12 to the other end, at this time, the first syringe 2 or the second syringe 3 connected with the protrusion 13 rotates around the rotating shaft 4, and then the first syringe 2 and the second syringe 3 are driven to rotate together, the first injection port 21 originally corresponding to the injection port 11 is converted into the second injection port 31, or the second injection port 31 originally corresponding to the injection port 11 is converted into the first injection port 21.

Further, the piston push rod 5 comprises a piston 52 and a push rod 51 which are separately arranged, the piston 52 is respectively arranged in the first needle cylinder 2 and the second needle cylinder 2, and the push rod 51 is used for pushing the piston 52; in the actual operation process, the liquid medicine is filled from the openings above the first needle cylinder 2 and the second needle cylinder 2, and the piston 52 is plugged into the first needle cylinder 2 and the second needle cylinder 2 after the liquid medicine is filled; before injection, the first injection port 21 or the second injection port 31 is aligned with the injection port 11, then the first needle cylinder is integrally inverted, the piston 52 is pressed by the push rod 51 to extrude and burst the sealing film, and then redundant air is removed for injection; after one syringe is injected, the other syringe is switched, the push rod 51 is aligned with the piston 52 in the other syringe, and the previous operations are repeated to complete the injection.

Example two:

as shown in fig. 3 and 4, the double syringe provided in this embodiment is different from the first embodiment in the conversion positioning means.

The conversion positioning device adopted by the embodiment comprises an annular groove 13 formed at the bottom of the outer cylinder 1; wherein, a limit piece 14 is arranged in the annular groove 13, the bottoms of the first needle cylinder 2 and the second needle cylinder 3 are respectively provided with a first slide piece 22 and a second slide piece 32, and the first slide piece 22 and the second slide piece 32 slide in the annular groove 13 along with the rotation of the first needle cylinder 2 and the second needle cylinder 3; when the first sliding piece 22 contacts with the limiting piece 14, the first injection port 21 is aligned with the injection port 11, and when the second sliding piece 32 contacts with the limiting piece 14, the second injection port 31 is aligned with the injection port 11.

Further, to ensure that the first injection port 21 and the second injection port 31 can be aligned with the injection port 11, the stopper 14, the first sliding piece 22, and the second sliding piece 32 cannot be too thick, and the thickness thereof does not exceed 1 mm.

Further, the annular groove 13 may be formed on the outer edge of the bottom of the outer barrel 1 (i.e. outside the injection port 11), or may be formed on the inner edge of the bottom of the outer barrel 1 (i.e. outside the injection port 12), and this embodiment is an alternative scheme in which the annular groove 13 may be formed on the outer edge of the bottom of the outer barrel 1.

Further, the rotating sleeve 42 in the rotating shaft 4 is higher than the outer cylinder 1, so that when the switching positioning device of the present embodiment is used, the rotating sleeve 42 can be held by one hand, and the outer cylinder 1 can be rotated by the other hand, thereby realizing switching of the first injection port 21 and the second injection port 31 at the injection port 11; it is also possible to hold the outer barrel 1 with one hand and rotate the rotating sleeve 42 with the other hand, thereby realizing the switching of the first injection port 21 and the second injection port 31 at the injection port 11.

Further, the limiting sheet 14 is arranged at the injection port 11 and is aligned with the center of the injection port 11; the first slide piece 22 and the second slide piece 32 are respectively arranged at the first injection port 21 and the second injection port 31 and are aligned with the centers of the first injection port 21 and the second injection port 31; thereby more conveniently and accurately judging whether the first injection port 21 or the second injection port 31 is aligned with the injection port 11.

Further, edges are arranged on the sides, facing the injection port 11, of the first injection port 21 and the second injection port 31, and the edges can be clamped into the injection port 11; the design can not only more accurately judge whether the first injection port 21 or the second injection port 31 is aligned with the injection port 11, but also further improve the stability of the injection port 21 or the second injection port 31 at the injection port 11.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A double syringe characterized by: the syringe comprises an outer cylinder, a first syringe and a second syringe which are arranged in the outer cylinder side by side;

the bottom of the outer barrel is provided with a rotating shaft, and the first needle cylinder and the second needle cylinder can axially rotate in the outer barrel by taking the rotating shaft as an axis; a conversion positioning device for driving the first needle cylinder and the second needle cylinder to rotate is arranged on the outer cylinder;

a first injection port and a second injection port are respectively formed at the bottoms of the first needle cylinder and the second needle cylinder, and the movement tracks of the first injection port and the second injection port at the bottom of the outer cylinder are the same; an injection port for mounting a needle head is formed at the bottom of the outer cylinder, and the injection port can be aligned with the first injection port and the second injection port respectively;

sealing films are respectively arranged on the first injection port and the second injection port;

and piston push rods are arranged in the first needle cylinder and the second needle cylinder.

2. Double syringe according to claim 1, characterized in that: the outer cylinder is internally provided with a baffle for limiting the first needle cylinder and the second needle cylinder to move in the radial direction, the baffle is provided with a through hole corresponding to the injection port, and the through hole is used for inserting the piston push rod into the first needle cylinder or the second needle cylinder.

3. Double syringe according to claim 2, characterized in that: the conversion positioning device comprises an opening formed in the wall of the outer cylinder in the circumferential direction and a protrusion arranged on the wall of the first needle cylinder or the second needle cylinder corresponding to the opening; the protrusion extends out of the outer cylinder through the opening, and after the protrusion slides from one end of the opening to the other end, the first injection port corresponding to the injection port is converted into the second injection port, or the second injection port corresponding to the injection port is converted into the first injection port.

4. Double syringe according to claim 2, characterized in that: the conversion positioning device comprises an annular groove formed in the bottom of the outer barrel; the injection device comprises a first needle cylinder, a second needle cylinder, a first sliding sheet, a second sliding sheet, a limiting sheet and a second injection port, wherein the annular groove is internally provided with the limiting sheet, the bottoms of the first needle cylinder and the second needle cylinder are respectively provided with the first sliding sheet and the second sliding sheet, the first sliding sheet and the second sliding sheet slide in the annular groove along with the rotation of the first needle cylinder and the second needle cylinder, when the first sliding sheet is in contact with the limiting sheet, the first injection port is aligned with the injection port, and when the second sliding sheet is in contact with the limiting sheet, the second injection port is aligned with the injection port.

5. Double syringe according to claim 4, characterized in that: the rotating shaft comprises a fixed shaft and a rotating sleeve, and the rotating sleeve is sleeved on the fixed shaft and rotates on the fixed shaft; the fixed shaft is fixed at the center of the bottom of the outer cylinder, and the rotating sleeve is respectively connected with the first needle cylinder and the second needle cylinder.

6. Double syringe according to claim 5, characterized in that: the rotating sleeve is higher than the outer cylinder.

7. Double syringe according to claim 4 or 6, characterized in that: the piston push rod comprises a piston and a push rod which are arranged in a split mode, the piston is arranged in the first needle cylinder and the second needle cylinder respectively, and the push rod is used for pushing the piston.

8. Double syringe according to claim 7, characterized in that: edges are arranged on one sides, facing the injection ports, of the first injection port and the second injection port, and the edges can be clamped into the injection ports.