TWI681791B - Nozzle for double combined syringe and double combined syringe - Google Patents

Abstract

The present invention relates to the field of medical devices, and in particular to a connector for a double-mixed syringe, a long nozzle for a double-mixed syringe, and a double-mixed syringe including the connector and/or the long nozzle. On the one hand, the outlet joint of the connecting piece for the double mixing syringe forms an outlet step structure, and the entrance part of the long nozzle of the long nozzle for the double mixing syringe forms an entrance step structure corresponding to the exit step structure, so that the long nozzle of the long nozzle The inlet part can be assembled in a sealed manner with the connector outlet joint of the connector and receive the liquid from the connector, so that the connector is adapted to connect with the long spray head; on the other hand, the connector for the double mixed syringe It can also be adapted to short spray heads. In this way, the connector for the double-hybrid syringe of the present invention can be used in both the spraying type and the cavity mirror type of use modes, and the connector and the long nozzle can be accurately butted in a simple manner.

Description

Nozzle for double combined syringe and double combined syringe

The present invention relates to the field of medical devices, and in particular to a connector for a double-mixed syringe, a long nozzle for a double-mixed syringe, and a double-mixed syringe including the connector and/or the long nozzle.

In the prior art, the same double-mixed syringe cannot be used as both a spray type (installed with a short spray head) and a cavity mirror type (installed with a long spray head), so the same double-mixed syringe cannot be switched according to needs. It is often necessary to configure two products of spray-type double-mixing syringe and endoscopic type double-mixing syringe at the same time. When using, only one specific type of double-mixing syringe can be used as needed. This will not only cause unnecessary waste, but also increase costs. Or, when the user needs to switch the mode of use of the double mixed syringe, manually remove the two single-barrel syringes from one type of double mixed syringe, and then reassemble it to another type of double mixed syringe. Operation is extremely inconvenient and increases the risk of failure. Therefore, the existing dual-mixed syringe cannot switch between the spraying type and the endoscopic type. There is a great need to design a method that can be applied to both the spray type and the cavity mirror type and can be quickly switched Connecting piece for the double mixed syringe.

In addition, in the prior art, although the spray-type double-mixing syringe is easy to use, the nozzle can be replaced during use to solve the problem of nozzle clogging after a pause, but the endoscopic double-mixing syringe generally cannot replace the nozzle, requiring the doctor to Use all the medicine for the pause, otherwise, once stopped, a blockage will occur and you cannot continue to use it. Therefore, there is a great need to design a cavity mirror type nozzle (long nozzle) that can be replaced at any time during use.

The present invention has been made based on the above-mentioned problems that need to be solved in the prior art.

An object of the present invention is to provide a dual-use connector for a double-mixed syringe, which can be connected to a long nozzle or a short nozzle, so that the spraying type and Two modes of use for endoscopic type.

Another object of the present invention is to provide a long spray head for a double-mixed syringe, which can easily and accurately connect with the above-mentioned connecting member for a double-mixed syringe.

Still another object of the present invention is to provide a double-combined mixed syringe, which includes the connecting member for the double-combined mixed syringe and/or the double-combined mixed injection With a long nozzle.

The present invention provides a connector for a double-mixed syringe, the connector including a connector body portion, a connector outlet joint protruding from the connector body portion toward an outlet side, and a connector body portion from the connector body portion A connector inlet joint protruding toward the inlet side, the connector outlet joint is used to assemble with a short nozzle or a long nozzle, the connector inlet joint is used to assemble with a single-barrel syringe, and at the connector outlet joint, The first liquid outlet portion through which the first liquid from one of the single-barrel syringes flows and the second liquid outlet portion through which the second liquid from the other of the single-barrel syringes flow are arranged side by side so as not to communicate with each other , And the first liquid outlet portion extends closer to the outlet side than the second liquid outlet portion, so that the end surface of the outlet side of the first liquid outlet portion is closer to the end surface of the outlet side of the second liquid outlet portion On the outlet side, the outlet joint of the connecting member forms an outlet step structure.

In some embodiments, the outer circumferential surface of the connector outlet joint is formed with an external thread portion, so that the connector outlet joint constitutes a male Luer joint structure; and/or the connector inlet joint constitutes Describe the structure of the female luer connector for the assembly of a single barrel syringe.

In some embodiments, the end surface of the external thread portion is flush with the end surface of the second liquid outlet portion on the outlet side.

In some embodiments, the external thread portion is a double-ended thread portion.

In some embodiments, the outer surface of the outlet joint of the connector There is a first groove for mounting an annular first sealing ring.

In some embodiments, the connecting member further includes a first diverting portion common to the first liquid outlet portion and the second liquid outlet portion, the flow path of the first liquid outlet portion and the second The flow path of the liquid outlet portion is separated by the first branching portion.

In some embodiments, the first diverging portion extends to be flush with the end surface of the first liquid outlet portion on the outlet side.

In some embodiments, the end surface on the outlet side of the first liquid outlet portion and the end surface on the outlet side of the first diverging portion together form a second groove for mounting an annular second seal ring.

In some embodiments, the cross-sectional shape of the first liquid inlet and the second liquid inlet are both circular; and/or the cross-sectional shape of the first liquid outlet and the first The cross-sectional shapes of the two liquid outlets are semicircular.

In some embodiments, the distance between the end face on the outlet side of the first liquid outlet and the end face on the outlet side of the second liquid outlet is 0.5 mm to 20 mm.

In some embodiments, the connector includes a first liquid delivery line and a second liquid delivery line that extend inside the body of the connector, and the connection of the first liquid delivery line from the connection The part of the main body part protruding toward the outlet side constitutes the first liquid outlet part, and the main body The portion protruding toward the inlet side constitutes the first liquid inlet portion, and the portion protruding from the connector body portion toward the outlet side of the second liquid delivery line constitutes the second liquid outlet portion, so A portion of the second liquid delivery line that protrudes from the connector body toward the inlet side constitutes the second liquid inlet, and the first liquid delivery line and the second liquid delivery line are separated from The first liquid inlet portion and the second liquid inlet portion extend toward the first liquid outlet portion and the second liquid outlet portion gradually approaching each other.

In some embodiments, the second liquid inlet is arranged at a predetermined distance from the first liquid inlet.

In some embodiments, the connector includes a buckle portion that extends from the connector body toward the entrance side, the buckle portion includes a buckle arm portion that extends linearly, and the buckle is provided on the buckle A buckle protrusion of the free end of the arm portion away from the main body of the connecting member.

The present invention also provides a long spray head for a double-mixed syringe, the long spray head including a first inlet portion and a second inlet portion arranged side by side with each other, the second inlet portion extending more than the first inlet The portion is closer to the inlet side, so that the end surface of the inlet side of the second inlet portion is closer to the inlet side than the end surface of the inlet side of the first inlet portion, so that the long nozzle is formed for use with any of the above technical solutions The inlet step structure of the outlet step structure of the connecting piece of the connecting piece of the connecting piece for the double mixed syringe described in the scheme matches the inlet, so that the long spray head can be connected to the connecting piece The piece outlet fitting assembles and receives liquid from the connecting piece.

In some embodiments, the long nozzle includes a long nozzle inlet connector, and the long nozzle inlet connector includes a long nozzle inlet portion and is sleeved on the long nozzle inlet portion so as to be rotatable relative to the long nozzle inlet portion The long nozzle entrance part is sleeved, and the long nozzle entrance part includes the first entrance part and the second entrance part, so that the long nozzle entrance part forms the entrance step structure.

In some embodiments, a second sealing ring is provided on the inlet side end surface of the first inlet portion, and when the inlet portion of the long nozzle is assembled with the connector outlet joint, the first The second seal ring abuts on the second groove provided on the outlet side end surface of the first liquid outlet portion and the outlet side end surface of the first diverter portion.

In some implementation aspects, the inlet portion of the long nozzle further includes a second branching portion for separating the flow path of the first inlet portion and the flow path of the second inlet portion, the The end surface on the entrance side is flush with the end surface on the entrance side of the first entrance portion.

In some embodiments, the long nozzle inlet sleeve has a cylindrical shape and is formed with an internally threaded portion that cooperates with the external thread portion of the connector outlet joint, so that the long nozzle inlet joint constitutes the Female luer connector structure for the outlet joint of the connecting piece.

In some embodiments, the outer peripheral surface of the entrance of the long nozzle is also shaped A sealing protrusion protruding annularly toward the entrance of the long nozzle and abutting against the entrance of the long nozzle is formed.

In some embodiments, the long nozzle further includes: a sheath tube, a first flow path and a second flow path separated from each other are formed in the sheath tube, and the inlet-side end of the sheath tube is The inlet portion of the long nozzle is fixed together so that the first flow path communicates with the flow path of the first inlet portion and the second flow path communicates with the flow path of the second inlet portion; The nozzle is installed at an end of the outlet side of the sheath tube so that the liquid flowing through the sheath tube is mixed at the nozzle and ejected from the nozzle.

In some embodiments, a molding cavity separated from both the first flow path and the second flow path is also formed inside the sheath tube, and the molding cavity is housed for molding the A linear shaped body of the sheath tube so that the sheath tube can be bent and maintain a predetermined shape.

In some embodiments, the linear shaped body includes a linear shaped body and a flat positioning portion provided at one end of the linear shaped body and extending from an end surface of the inlet side of the sheath. The positioning portion is fixed to the entrance of the long nozzle.

In some implementation aspects, the positioning portion is embedded in the second branching portion of the entrance portion of the long nozzle.

In some embodiments, the length of the positioning portion in the radial section of the linear shaped body is greater than the diameter of the linear shaped body, and And the width of the positioning portion in the radial section of the linear shaped body is smaller than the diameter of the linear shaped body.

In some embodiments, the linear shaped body is a metal wire.

In some embodiments, in the cross-section of the sheath taken along the radial direction, the cross-sectional shape of the first flow path and the cross-sectional shape of the second flow path are both arc-shaped and relative to the cross-section The geometric center of the center symmetry.

In some embodiments, the axial centerline of the modeling cavity is consistent with the axial centerline of the sheath tube.

In some embodiments, the sheath is made of soft plastic or rubber.

In some embodiments, the inlet of the long nozzle is integrally formed with the sheath.

In some embodiments, the nozzle includes a nozzle body and a spiral speed increasing member, the spiral speed increasing member is received in the nozzle body, the nozzle body and the spiral speed increasing member together form an axially through A flow channel, the flow channel includes: a pressure chamber, at least two vortex acceleration channels extending spirally are formed in the pressure chamber to enable the liquid flowing into the at least two vortex acceleration channels to form a vortex And accelerate; laminar flow channel, the laminar flow channel includes a converging portion and at least three arc-shaped branch channels extending radially outward from the converging portion, the diameter of the converging portion is smaller than the diameter of the pressure chamber , The converging portion communicates with the pressure chamber through the at least three arc-shaped branch channels, and the liquid from the pressure chamber can pass through the at least three The arc-shaped branch channels are further accelerated to flow into the converging portion to form a vortex; an axial cavity, the diameter of the axial cavity is smaller than the diameter of the pressure cavity, and the axial cavity is in direct communication with the converging portion; And a spray cavity, the diameter of the spray cavity is smaller than the diameter of the shaft cavity, the spray cavity is in direct communication with the shaft cavity, the liquid from the shaft cavity can flow into the spray cavity and from The injection cavity is ejected.

In some embodiments, the at least three arc-shaped branch channels are located at the same position in the axial direction and overlap the convergent portion in the axial direction.

In some embodiments, the cross-sectional area of each of the arc-shaped branch channels gradually decreases from one end of each of the arc-shaped branch channels that communicates with the pressure chamber toward the other end that communicates with the converging portion.

In some embodiments, each of the one ends is evenly distributed in the circumferential direction, and each of the other ends is evenly distributed in the circumferential direction.

In some embodiments, at the one end, the outer side wall forming each of the arc-shaped branch channels is tangent to the side wall forming the pressure chamber; and/or at the other end, each of the arcs is formed The outer side wall of the branched channel is tangent to the side wall forming the converging portion.

In some embodiments, the spiral speed increasing member is received in the pressure chamber and includes: a spiral speed increasing member main body having a cylindrical shape extending along the axial direction, the spiral The axial end surface of the speed increasing member body is pressed against the axial end surface of the pressure chamber; and a plurality of externally threaded portions, the plurality of externally threaded portions from the screw The outer peripheral surface of the main body of the speed-increasing gear protrudes radially outward, and the plurality of externally threaded portions extend parallel to each other and spirally to form a space between the plurality of externally threaded portions and the side wall forming the pressure chamber Describe the swirl acceleration channel.

In some embodiments, the axial start point and/or end point of each of the externally threaded portions is located between the two axial end surfaces of the spiral speed increasing member body.

In some embodiments, a concave portion for forming the converging portion is formed on the end surface of the pressure chamber of the nozzle body and the diameter of the spiral speed increasing body is larger than the diameter of the converging portion, such that The main body of the spiral speed increasing member is pressed against the end surface.

In some embodiments, the nozzle body further includes a mounting cavity for engaging with other components. The mounting cavity is in communication with the pressure cavity and is located on an axial side of the pressure cavity.

In some embodiments, the diameter of the mounting cavity is smaller than the diameter of the sheath tube, so that the sheath tube and the nozzle body are assembled together in an interference fit manner.

In some embodiments, the flow channel further includes a nozzle hole portion, the nozzle hole portion communicates with the injection cavity, and the cross-sectional area of the nozzle hole portion gradually increases from the injection cavity.

In some embodiments, the ratio of the diameter of the injection cavity to the diameter of the axial cavity is in the range of 1:4 to 2:3, and/or the convergent part of the laminar flow channel The diameter is equal to the diameter of the axial cavity, and the ratio of the dimension of the laminar flow channel in the axial direction to the dimension of the axial cavity in the axial direction is 1:1.

The present invention also provides a double-combined mixed syringe, the double-combined mixed syringe comprising: the connecting member for the double-combined mixing syringe according to any one of the above technical solutions; and an outlet joint part with the connecting member A short nozzle for the connected double mixed syringe and/or a long nozzle for the double mixed syringe according to any one of the above technical solutions connected to the outlet joint of the connecting member; two single barrel syringes, The two single-barrel syringes are connected to the connector inlet joint of the connecting member; and a fixing frame is used to fix the two single-barrel syringes and the connecting member.

In some embodiments, the short spray head includes a nozzle body and a spiral speed increasing member housed in the nozzle body, the nozzle body is the nozzle body described in any one of the above technical solutions and is formed with The internal threaded portion of the external threaded portion of the connector outlet joint of the connecting member is matched, and the spiral speed increasing member is the spiral speed increasing member described in any one of the above technical solutions.

In some embodiments, the fixing frame has a T-shaped structure, and the fixing frame includes a lateral portion extending in the lateral direction and a longitudinal portion extending in the longitudinal direction from a substantially central portion in the lateral direction of the lateral portion. The lateral portion is formed with two mounting holes arranged along the lateral direction, and the two single-barrel syringes are respectively inserted into the two mounting holes and mounted to the two mounting holes.

In some embodiments, the single-barrel syringe includes a liquid reservoir and a push-pull rod capable of piston movement in the liquid reservoir. The liquid reservoir includes a cylindrical liquid reservoir body and a liquid reservoir. A liquid reservoir outlet portion and a flange portion of the main body, the liquid reservoir outlet portion is assembled with the connector inlet joint of the connector, and when the single barrel syringe is mounted on the fixing frame, the The flange portion abuts on the lateral portion.

In some embodiments, the lateral portion further includes at least two limiting portions disposed on both lateral sides of each mounting hole, the limiting portion is snapped on the flange portion, so that the single The barrel syringe is fixed to the fixing frame.

In some embodiments, the distance between the limiting portion and the central axis of the corresponding mounting hole is smaller than the maximum distance between the outer contour of the flange portion and the central axis.

In some embodiments, the outer contour of the flange portion is an oblong shape, and the straight line portion of the outer contour of the flange portion is engaged with the limiting portion.

In some embodiments, the outlet portion of the liquid storage portion forms a male luer connector structure that matches the female luer connector structure of the connector inlet connector of the connector.

In some embodiments, the two longitudinal portions extend opposite to each other and the free ends of the two longitudinal portions away from the lateral portion form longitudinal portion protrusions that project toward each other, such that the longitudinal direction The convex part is engaged with the snap part of the connecting piece to make the relative position of the fixing frame and the connecting piece at least in the longitudinal direction fixed.

In some embodiments, the double-mixed syringe further includes a push-pull rod connecting plate, and the push-pull rod connecting plate is mounted on the operating part of the push-pull rod of the two single-barrel syringes so that the operating part of the push-pull rod is always Align and link.

In some embodiments, the single-barrel syringe is a single-barrel syringe pre-packaged with liquid, and the single-barrel syringe has identification information corresponding to the packaged liquid.

In some embodiments, the inlet step structure of the long nozzle entrance portion through the long nozzle head cooperates with the outlet step structure of the outlet joint of the connector of the connector, so that the first inlet portion of the inlet port of the long nozzle head is The first liquid outlet portion of the connector outlet joint is accurately docked and the second inlet portion of the long nozzle inlet portion is accurately docked with the second liquid outlet portion of the connector outlet joint.

By adopting the above technical solution, the present invention provides a novel connector for a double-mixed syringe, a new long nozzle for a double-mixed syringe, and a double-mixed syringe including the connector and/or the long nozzle. The connecting piece of the double mixed syringe of the invention can be used for both the spraying type and the cavity mirror type, and the two using modes can be quickly switched by simply changing different spraying heads. The connecting piece can be directly adapted to the short spraying head The spraying type double mixing syringe can also be matched with the long nozzle of the double mixing syringe of the present invention to form a cavity mirror type double mixing syringe; in addition, the outlet joint of the connecting piece of the connecting piece forms an outlet step structure, corresponding to the above double The length of the long nozzle of the combined mixing syringe The inlet part of the nozzle forms an inlet step structure corresponding to the outlet step structure of the outlet joint of the connector, so that the connector for the double mixing syringe and the long nozzle for the double mixing syringe can be accurately docked in a simple manner, avoiding The connection of the long nozzle is misaligned, which causes the liquid to be mixed in advance.

1‧‧‧short nozzle

11‧‧‧ Nozzle body

111‧‧‧ Major Diameter Department

112‧‧‧ Small diameter part

12‧‧‧Screw speed increasing parts

121‧‧‧Main body of spiral speed-increasing parts

122A‧‧‧The first external thread

122B‧‧‧Second external thread

2‧‧‧Connector

21‧‧‧Connector body

211‧‧‧The first liquid delivery pipeline

211C‧‧‧Second groove

211I‧‧‧The first liquid inlet

211O‧‧‧The first liquid outlet

212‧‧‧Second liquid delivery pipeline

212I‧‧‧Second liquid inlet

212O‧‧‧Second Liquid Outlet

213‧‧‧Liquid delivery pipeline connection

22‧‧‧Connector outlet joint

221‧‧‧ External thread part

222‧‧‧First groove

223‧‧‧First Division

22O‧‧‧First sealing ring

23‧‧‧Inlet connector

231‧‧‧Connector inlet joint sleeve

232‧‧‧Connector inlet joint casing connection part

24‧‧‧Snap

241‧‧‧Snap arm

242‧‧‧Snap protrusion

3‧‧‧Single barrel syringe

31‧‧‧Liquid storage department

311‧‧‧Main body of liquid storage

312‧‧‧Export Department of Liquid Storage Department

313‧‧‧Flange

32‧‧‧Push-pull rod

4‧‧‧Fixing frame

41‧‧‧Transverse

411‧‧‧ mounting hole

412‧‧‧Limiting Department

42‧‧‧Vertical

421‧‧‧Longitudinal bump

5‧‧‧Push-pull rod connecting plate

51‧‧‧groove

52‧‧‧recess

6‧‧‧long nozzle

61‧‧‧sheath

611‧‧‧ First-rate

612‧‧‧Second flow path

613‧‧‧Modeling cavity

62‧‧‧Nozzle

621‧‧‧ Nozzle body

622‧‧‧Screw speed increasing parts

63‧‧‧Long nozzle inlet connector

631‧‧‧ Long nozzle entrance

6311‧‧‧First entrance

6311O‧‧‧Second sealing ring

6312‧‧‧Second entrance

6313‧‧‧Second Division

6314‧‧‧Seal bump

632‧‧‧Long nozzle inlet sleeve

6321‧‧‧Sleeve body

6322‧‧‧Female thread part

6323‧‧‧Export flange

64‧‧‧Linear body

641‧‧‧Linear body

642‧‧‧Positioning Department

A‧‧‧axial

L1‧‧‧First liquid

L2‧‧‧Second liquid

M‧‧‧Installation cavity

M1‧‧‧Annular groove

M2‧‧‧ female thread part

R‧‧‧Radial

S‧‧‧Stream

S1‧‧‧Pressure chamber

S11‧‧‧The first cyclone acceleration channel

S12‧‧‧Second cyclone acceleration channel

S2‧‧‧Layered channel

S21‧‧‧ Convergence Department

S22‧‧‧Curved branch channel

S3‧‧‧Axis cavity

S4‧‧‧Jet chamber

S5‧‧‧Spray hole

Other features and functions of the present invention will be clearly presented in the embodiment with reference to the drawings, wherein: FIG. 1a is a schematic structural view of a double-mixed syringe according to the first embodiment of the present invention; FIG. 1b is in FIG. 1a The exploded schematic diagram of the double mixed syringe.

FIG. 2a is a schematic cross-sectional view of the short spray head of the double mixing syringe in FIG. 1a; FIG. 2b is a partial perspective perspective view of the short spray head in FIG. 2a.

Fig. 3a is a perspective view of the spiral speed increasing member of the short nozzle in Fig. 2a; Fig. 3b is a front view of the spiral speed increasing member of the short nozzle in Fig. 2a.

4a, 4b and 4c are explanatory diagrams for explaining the pressure chamber and the swirl acceleration channel of the short nozzle in FIG. 2a.

5a, 5b, 5c and 5d are explanatory diagrams for explaining the ejection cavity, the axis cavity and the laminar flow channel of the short nozzle in FIG. 2a.

Fig. 6a is a schematic perspective view of the connecting member of the double-mixed syringe in Fig. 1a; Fig. 6b is another schematic perspective view of the connecting member in Fig. 6a.

7a is a schematic cross-sectional view of the connector in FIG. 6a; FIG. 7b is an explanatory diagram for explaining the flow state of the two liquids in the connector in FIG. 6a.

FIG. 8 is a schematic view of the structure of the single-barrel syringe of the double-mixed syringe in FIG. 1a.

FIG. 9 is a schematic structural view of the fixing frame of the double-mixed syringe in FIG. 1a.

10a to 10c are explanatory views for explaining that the single-barrel syringe in FIG. 8 is assembled in the fixing frame in FIG. 9.

11a to 11c are explanatory diagrams for explaining the assembling process of the double mixing syringe in FIG. 1a.

Fig. 12 is an exploded schematic view of a double-mixed syringe according to a second embodiment of the present invention.

FIG. 13 is a schematic view of the structure of the long nozzle of the double mixing syringe in FIG. 12.

14a is a partial cross-sectional view of the long nozzle of FIG. 13; FIG. 14b is a schematic structural view of the structure of FIG. 14a after the sleeve of the inlet of the long nozzle is removed; FIG. 14c is a sleeve of the inlet of the long nozzle of FIG. 14a Schematic cross-sectional view.

15a is a cross-sectional view of another partial structure of the long nozzle in FIG. 13; FIG. 15b is a schematic cross-sectional view of the nozzle of the long nozzle in FIG.

FIG. 16a is a partial schematic view of the sheath of the long nozzle in FIG. 13; FIG. 16b is a schematic top view of the sheath of FIG. 16a.

17a is a schematic structural view of the linear shaped body in FIG. 13; FIG. 17b is a partial structural schematic view of the linear shaped body in FIG. 17a; FIG. 17c is a linear shaped body in FIG. 17b FIG. 17a is a schematic diagram illustrating the structure of the sheath assembled in FIG. 16a; FIG. 17d is an explanatory diagram for explaining that the positioning part of the linear shaped body in FIG. 17a is fixed to the second diverter part.

Fig. 18a is a schematic view showing the state of the sheath tube of the long shower head in Fig. 16a before being bent; Fig. 18b is a schematic view showing the state of the sheath tube of the long shower head in Fig. 16a after bending.

FIG. 19 is an explanatory diagram for explaining the assembly process of the connector and the long nozzle of the double mixing syringe in FIG. 12.

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings of the specification. It should be noted that in the present invention, "longitudinal" refers to the longitudinal direction of the double-combined mixing syringe according to the present invention (left-right direction in FIG. 1a), and "lateral" refers to the width of the double-combined mixing syringe according to the present invention. Direction (up and down direction in FIG. 1a); in addition, for each component of the double mixing syringe according to the present invention, the "inlet side" refers to the upstream side of the liquid flow direction in the component (left side in FIG. 1a), "Outlet side" refers to the downstream side of the flow direction of the liquid in the component (right side in Fig. 1a).

In the following, the structure of the double-mixed syringe according to the first embodiment of the present invention will be described first with reference to the drawings.

(Structure of the double mixed syringe according to the first embodiment of the present invention)

As shown in FIGS. 1a and 1b, the double mixing syringe according to the first embodiment of the present invention includes a short spray head (ultra-low pressure swirl atomizing nozzle) 1, a connecting member 2, two single barrel syringes 3, a fixing frame 4和推拉杆连接板5。 And push rod connection plate 5.

Specifically, the short spray head 1 is mounted on the connector 2 and communicates with the liquid outlet of the connector 2. The liquid inlet of the connecting piece 2 communicates with the liquid outlets of the two single-barrel syringes 3, so that both single-barrel syringes 3 communicate with the short spray head 1 through the connecting piece 2. The two single-barrel syringes 3 are arranged side by side and are fixed through the fixing frame 4, and at the same time, the fixing frame 4 and the connecting piece 2 are snapped together. The push-pull rods of the two single-barrel syringes 3 are fixed to the push-pull rod connecting plate 5 together, so that the push-pull rods of the two single-barrel syringes 3 can be linked.

In this way, the different kinds of liquids in the two single-barrel syringes 3 are pushed into the short spray head 1 through the connecting member 2 by the pushing rod, and finally ejected in a mist state. The short spray head 1 and the connecting member 2 can also achieve a sealed connection, thereby preventing liquid from leaking between the short spray head 1 and the connecting member 2. Therefore, the double mixing syringe of the present embodiment can realize the connection between the connecting member 2 and the short spray head 1, so that the double mixing syringe can realize the normal spraying function as a spray type double mixing syringe.

The structure of each component of the twin-mixing syringe of this embodiment will be described in detail below with reference to the drawings of the specification.

(Structure of short nozzle 1)

In this embodiment, the short nozzle 1 is cylindrical in its entirety, and the short nozzle 1 has an axial direction, a radial direction, and a circumferential direction; one side in the axial direction refers to the right side in FIG. 2a, and the other side in the axial direction refers to Left side in Figure 2a.

As shown in FIGS. 2a and 2b, the short spray head 1 includes a nozzle body 11 and a spiral speed increasing member 12. In the nozzle body 11, a flow channel S and an installation cavity M which penetrate the entire nozzle body 11 in the axial direction A and communicate with each other are formed, wherein the flow channel S is used for the liquid flowing into the short nozzle 1 to flow through, and the installation cavity M is used for installation in the double The liquid outlet of the connector 2 of the hybrid syringe. The above-mentioned flow channel S includes a pressure chamber S1, a laminar flow channel S2, an axis chamber S3, an injection chamber S4, and an injection hole portion S5 communicating with each other in the axial direction A from the axial side to the axial side, while the spiral increases The speed member 12 is accommodated in the pressure chamber S1 and forms a first swirl acceleration passage S11 and a second swirl acceleration passage S12 with the side wall forming the pressure chamber S1. In this way, the liquid flowing into the flow channel S of the short nozzle 1 will be in the pressure chamber S1 (first swirl acceleration channel S11, second swirl acceleration channel S12) → laminar flow channel S2 → axial cavity S3 → spray cavity S4 → spray The holes S5 flow sequentially, and are finally ejected in the mist state at the injection holes S5.

In the present embodiment, the nozzle body 11 includes a large-diameter portion 111 and a small-diameter portion 112, and the outer diameter of the large-diameter portion 111 is larger than the outer diameter of the small-diameter portion 112. The mounting cavity M is formed in the large-diameter portion 111, and the flow path S is formed in the small-diameter portion 112. In this way, when the diameter of the mounting cavity M is larger than the maximum diameter of each component of the flow channel S, the side wall forming the flow channel S in the small-diameter portion 112 is not excessively thick.

In this embodiment, as shown in FIGS. 3a and 3b, the spiral speed-increasing member 12 is a double-headed screw and includes a spiral speed-increasing member body 121 and two external thread portions (a first external thread portion 122A and a second external thread Part 122B).

The spiral speed increaser body 121 has a cylindrical shape extending along the axial direction A. In this embodiment, the diameter of the spiral speed-increasing body 121 is larger than the diameter of the following converging portion S21 (see FIG. 5b) of the laminar flow channel S2 and the axial end surface pressure of the spiral speed-increasing body 121 is The end surface on the other side of the pressure chamber S1 in the axial direction makes the converging portion S21 of the laminar flow channel S2 and the pressure chamber S1 communicate only through the arc-shaped branch channel S22; the axial side of the spiral speed increasing body 121 The end face of S is slightly protruded from the pressure chamber S1 into the installation chamber M. In the present embodiment, preferably, the diameter of the spiral speed-increasing body 121 is about 2 mm and the length in the axial direction A is about 4.6 mm.

Both the first male threaded portion 122A and the second male threaded portion 122B project radially outward from the outer peripheral surface of the spiral speed-increasing body 121, and each of the male thread portions 122A, 122B of the spiral speed-increasing member 12 and the pressure-forming cavity S1 The side walls are tightly fitted; further, the first externally threaded portion 122A and the second externally threaded portion 122B extend parallel to each other and spirally. In this way, two swirl acceleration passages (first swirl acceleration passage S11 and second swirl acceleration passage S12) are formed between the two externally threaded portions 122A, 122B and the side wall forming the pressure chamber S1. In the present embodiment, preferably, the first male screw portion 122A and the second male screw portion 122B each have a screw angle of 60 degrees, a pitch of 5 mm, and a screw width of 1.4 mm.

In addition, the starting point and the ending point of both the first male screw portion 122A and the second male screw portion 122B in the axial direction A are located between the two end surfaces of the spiral speed increasing body 121 in the axial direction A. In other words, the first external thread 122A and the second external thread The axial end surfaces of both parts 122B are located on the axially opposite side from the axial end surface of the spiral speed increaser body 121, and both the first male screw part 122A and the second male screw part 122B The end surface on the other side in the axial direction is located closer to the axial side than the end surface on the other side in the axial direction of the spiral speed increaser body 121. The axially end surface of both the first externally threaded portion 122A and the second externally threaded portion 122B is parallel to the axially end surface of the spiral speed increaser body 121, and the first externally threaded portion 122A and the second externally threaded The end surfaces on the other side in the axial direction of both parts 122B are parallel to the end surfaces on the other side in the axial direction of the spiral speed increasing body 121. In the present embodiment, it is preferable that the distance between the end surface on the axial side of both the first male screw portion 122A and the second male screw portion 122B and the end surface on the axial side of the spiral speed increaser body 121 The distance between the axially opposite end surface of both the first externally threaded portion 122A and the second externally threaded portion 122B and the axially other end surface of the spiral speed increaser body 121 is equal to 0.3 mm .

The specific structure of the flow channel S and the mounting cavity M of the short nozzle 1 will be described below.

After the flow channel S of the short nozzle 1 receives the mixed liquid from the connecting member 2, the liquid will be accelerated, pressurized, and finally ejected in a mist state in the flow channel S for many times. As described above, the flow path S penetrates the small-diameter portion 112 of the short nozzle 1 in the axial direction A. The flow path S includes the pressure chamber S1, the laminar flow path S2, the axial cavity S3, the injection chamber S4, and the injection hole portion S5. The flow path S flows in the order of the pressure chamber S1 → the laminar flow path S2 → the axis chamber S3 → the injection chamber S4 → the injection hole portion S5.

In this embodiment, as shown in FIG. 4a, the pressure chamber S1 is entirely cylindrical In shape, the end on one side in the axial direction of the pressure chamber S1 directly communicates with the end on the other side in the axial direction of the mounting chamber M. As shown in FIGS. 4b and 4c, through the spiral speed-increasing member 12 housed in the pressure chamber S1 and the side wall forming the pressure chamber S1, a spirally extending first spiral flow acceleration channel S11 and a second parallel to each other are formed The swirling acceleration passage S12 causes the liquid flowing into the pressure chamber S1 to form a swirling flow and accelerate via the first swirling acceleration passage S11 and the second swirling acceleration passage S12.

Using the principle of inertial acceleration of the swirl acceleration channels S11 and S12, after the liquid passes through the swirl acceleration channels S11 and S12, the flow velocity is accelerated and the pressure is increased. The liquid has been accelerated before reaching the arc branch channel S22 of the laminar flow channel S2 Pressure, even if the initial pressure of the liquid is insufficient, it can allow the liquid to obtain sufficient speed and pressure after passing through the swirl acceleration channels S11 and S12, thereby ensuring a uniform atomization effect when spraying.

In the present embodiment, as shown in FIG. 5b, the laminar flow channel S2 includes a converging portion S21 and, for example, three arc-shaped branch channels S22 extending in a scatter shape radially outward from the converging portion S21. The converging portion 21 has a cylindrical shape as a whole and the diameter of the converging portion S21 is smaller than the diameter of the pressure chamber S1. The converging portion S21 communicates with the pressure chamber S1 through three arc-shaped branch channels S22, and the liquid from the pressure chamber S1 only passes through the three arc-shaped branch channels S22 It is further accelerated to flow into the converging portion S21, and a vortex is formed at the converging portion S21.

The three arc-shaped branch channels S22 are located at the same position in the axial direction A and overlap the converging portion S21 in the axial direction A. Each arc-shaped branch channel S22 has the same Arranged in an arc shape and protruding toward the same side in the circumferential direction. The cross-sectional area of each arc-shaped branch channel S22 gradually decreases from one end of each arc-shaped branch channel S22 that communicates with the pressure chamber S1 toward the other end that communicates with the converging portion S21. Each end is evenly distributed in the circumferential direction, and the other end is evenly distributed in the circumferential direction.

Further, the outer side wall forming each arc-shaped branch channel S22 is tangent to the side wall forming the converging portion S21 and the side wall forming the pressure chamber S1, so that the liquid forming the swirl flow in the pressure chamber S1 can smoothly branch through the arc The channel S22 flows into the converging portion S21. Preferably, the dimension of the entire laminar flow channel S2 in the axial direction A is 0.2 mm to 1.0 mm, and the diameter of the converging portion S21 is 0.3 mm to 2.0 mm.

For ease of manufacturing, a concave portion is formed on the end surface of the nozzle body 11 where the pressure chamber S1 is formed, and the spiral speed-increasing element body 121 passing through the spiral speed-increasing element 12 and the concave portion surround an arc-shaped branch channel S22.

Preferably, the diameter of the converging portion S21 of the laminar flow channel S2 is equal to the diameter of the axial cavity S3, and the dimension of the laminar flow channel S2 in the axial direction A is the same as the dimension of the axial cavity S3 in the axial direction A The ratio is 1:1.

As shown in FIG. 5c, the axial cavity S3 has a cylindrical shape as a whole. The diameter of the axial cavity S3 is smaller than the diameter of the pressure cavity S1 and is equal to the diameter of the converging portion S21 of the laminar flow channel S2. The axial cavity S3 and the converging portion S21 are on the axis Connect directly to A. The liquid from the pressure chamber S1 flows into the axial cavity S3 after passing through the three arc-shaped branch channels S22 and the converging portion S21. Preferably, the diameter of the axial cavity S3 ranges from 0.3 mm to 2.0 mm, and the dimension range in the axial direction A The circumference is 0.3mm to 2.0mm.

In this embodiment, as shown in FIG. 5d, the injection cavity S4 has a cylindrical shape as a whole, the diameter of the injection cavity S4 is smaller than the diameter of the axial cavity S3, the injection cavity S4 and the axial cavity S3 are directly communicated in the axial direction A, from The liquid in the axial cavity S3 can be ejected from the ejection cavity S4. Preferably, the diameter of the injection cavity S4 is 0.2 mm to 0.5 mm, and the ratio of the diameter of the injection cavity S4 to the diameter of the axial cavity S3 ranges from 1:4 to 2:3.

In this way, the shape shown in FIG. 5a is formed through the laminar flow channel S2, the axial cavity S3, and the injection cavity S4 having the above-mentioned specific structure, so that the liquid from the pressure chamber S1 passes through the laminar flow channel S2 to form a vortex acceleration while permeating the layer The flow channel S2, the axial cavity S3 and the injection cavity S4 form a sudden acceleration of the cross section, and finally the liquid obtains sufficient pressure to ensure a uniform atomization effect during the injection.

In this embodiment, the injection hole portion S5 has a conical shape as a whole, the axial end of the injection hole portion S5 communicates with the injection chamber S4 in the axial direction A, and the injection hole portion S5 extends from the injection chamber S4 toward the axial direction. One side extends to the axially opposite end surface of the short nozzle 1, and the cross-sectional area of the injection hole portion S5 gradually increases from the injection chamber S4 toward the axially opposite end surface of the short nozzle 1. In this way, the liquid ejected from the ejection chamber S4 can smoothly diffuse in the mist state toward the outside of the short nozzle 1 along the ejection hole portion S5.

Further, in this embodiment, as described above, the installation cavity M communicates with the pressure cavity S1 and is located on the axial side of the pressure cavity S1, and the diameter of the installation cavity M is larger than the diameter of the pressure cavity S1.

As shown in FIG. 2a, at a portion near the other end of the installation cavity M in the axial direction, a female screw portion M2 is formed on the side wall forming the mounting cavity M, and the female screw portion M2 is used to 2 Installation, through the connecting member 2 can be pressed against the spiral speed-increasing member 12 in the axial direction A, so that the spiral speed-increasing member 12 is pressed tightly against the other axial end surface of the pressure chamber S1. Preferably, the internal thread part M2 is a double-end threaded part, so under the same circumstances, the double-end threaded part is tightened to save half the number of turns than the ordinary single-end threaded part, which saves assembly time, and the double-ended threaded part is due to the double The double screw pitch can effectively reduce the problem of misalignment caused by misalignment of threads. The following double-ended threaded parts have the same advantages. In addition, an annular groove M1 for mounting a seal ring is formed on the other axial end surface of the mounting cavity M. In this embodiment, the annular groove M1 has a triangular cross section in the radial direction R. The annular groove M1 is used to install a sealing ring to prevent liquid leakage in the installation cavity M.

By adopting the above structure, the liquid can reach the preset pressure after the liquid flows into the axial cavity S3 through the pressure chamber S1 and the laminar flow channel S2. The short spray head 1 of this embodiment stabilizes the cross-sectional area of the flow channel S through which the liquid flows to a very small value, ensuring that the atomization parameters of the short spray head 1 are stabilized under use conditions, so that the liquid can be sprayed stably in the mist state It can reduce the performance impact on the precision atomizing short nozzle 1 due to the difference in parts assembly process.

In this way, by using the short nozzle 1 described above, the flow channel S of the short nozzle 1 forms a pressure chamber S1 having a different cross-sectional area, a laminar flow channel S2, an axial cavity S3, and an injection cavity S4 and passes through the swirl acceleration channels S11, S12 and The arc-shaped branch channel S22 is opposite to the liquid in the flow channel S The body is accelerated by multiple swirls, which can increase the flow velocity and pressure of the liquid in the flow channel S from both abrupt cross-section and swirl acceleration, so that even if the initial pressure of the liquid is at an ultra-low pressure, good atomization can be obtained effect.

The specific structure of the short spray head 1 of the double mixing syringe according to the first embodiment of the present invention has been described above in detail, and the structure of the connector 2 of the double mixing syringe will be described below.

(Structure of connector 2)

In this embodiment, the connector 2 is located on the upstream side of the short nozzle 1 in the flow direction of the liquid and on the downstream side of the two single barrel syringes 3 in the flow direction of the liquid, from the two single barrel syringes 3 Two different liquids can flow in the connecting piece 2 and finally be delivered into the short spray head 1. It should be noted that the left side in FIG. 7a is the exit side, and the right side in FIG. 7b is the entrance side.

As shown in FIGS. 6a to 7b, the connector 2 includes a connector body portion 21, a connector outlet joint 22 protruding from the connector body portion 21 toward the outlet side, and a connection protruding from the connector body portion 21 toward the inlet side The fitting inlet joint 23 and the snap portion 24 fixed to the fitting inlet joint 23.

Specifically, in this embodiment, a cavity is formed inside the connector body 21 and the cavity forms an opening on both the inlet side and the outlet side, and the opening size of the inlet side of the connector body 21 is larger than the connector body 21 the size of the opening on the outlet side. In the longitudinal direction of the connector 2 as shown in FIG. 7a (left-right direction in FIG. 7a) In the cross-sectional view taken, the connector body 21 has a substantially triangular cross-sectional shape. A first liquid delivery line 211 and a second liquid delivery line 212 are provided in the cavity inside the connector body 21.

In this embodiment, the first liquid delivery line 211 is independent of the second liquid delivery line 212. Each of the first liquid delivery line 211 and the second liquid delivery line 212 has a curved shape that extends substantially along the lateral (upper and lower directions in FIG. 7a) edge of the connector body 21. Since the first liquid delivery line 211 and the second liquid delivery line 212 respectively extend along the lateral edges of the connector body 21, the first liquid delivery line 211 and the second liquid delivery line 212 are directed from the inlet side toward the outlet Close to each other while extending sideways. In this way, without affecting the connection between the first liquid delivery line 211 and the second liquid delivery line 212 and the spaced two single-barrel syringes 3, the first liquid delivery line 211 and the second liquid delivery tube The liquids L1 and L2 (shown in FIG. 7b) flowing in the path 212 can flow into the short head 1 at the outlet sides of the first liquid delivery line 211 and the second liquid delivery line 212 in close proximity to each other.

Further, the first liquid delivery line 211 is formed with a first liquid inlet portion 211I for connection with one single-barrel syringe 3 and a first liquid outlet portion 211O for connection with the short spray head 1. The second liquid delivery line 212 is formed with a second liquid inlet portion 212I for connection with another single-barrel syringe 3 and a second liquid outlet portion 212O for connection with the short spray head 1.

On the one hand, the first liquid outlet 2110 and the second liquid outlet 212O protrudes from the opening on the outlet side of the connector body 21 toward the outlet side, and the first liquid outlet 2110 and the second liquid outlet 212O are arranged side by side in an adjacent manner to constitute a connection for connection to the short shower head 1 Piece outlet connector 22. The connector outlet joint 22 has a cylindrical shape as a whole, and at the connector outlet joint 22, the first liquid outlet portion 2110 extends closer to the outlet side than the second liquid outlet portion 212O, so that the connector outlet joint 22 forms an outlet step structure . It can also be said that the first liquid outlet portion 211O is formed as a boss protruding from the end surface of the second liquid outlet portion 212O on the outlet side, for example, the protrusion protrudes from the end surface of the second liquid outlet portion 212O on the outlet side 2mm. Preferably, the distance between the outlet-side end surface of the first liquid outlet portion 2110 and the outlet-side end surface of the second liquid outlet portion 212O is 0.5 mm to 20 mm. In this embodiment, the cross-sectional shape of the first liquid outlet portion 211O and the cross-sectional shape of the second liquid outlet portion 212O are both semicircular. In addition, the end surface on the outlet side of the first liquid outlet portion 211O and the end surface on the outlet side of the first diverter portion 223 described below jointly form a second groove 211C for mounting an annular seal ring.

Further, the outer peripheral surface of the connector outlet joint 22 is formed with a male threaded portion 221 as a double-ended threaded portion, so that the connector outlet joint 22 constitutes a male luer structure inserted into the mounting cavity M of the short nozzle 1 and the male threaded portion 221 It cooperates with the internal thread part M2 in the installation cavity M of the short nozzle 1. The end surface of the male screw portion 221 is flush with the end surface of the second liquid outlet portion 212O on the outlet side. Preferably, the outer diameter of the externally threaded portion 221 is 7 mm to 8 mm.

Further, the outer circumferential surface of the outlet fitting 22 of the connector is formed with a first groove 222 to which the first seal ring 22O is installed, and the first groove 222 is located closer to the entrance side than the external thread portion 221. Through the first sealing ring 22O, the connector outlet joint 22 and the inner wall of the nozzle body 11 of the short nozzle 1 for forming the mounting chamber M can be sealed, thereby preventing liquid leakage.

In the connector outlet joint 22, both the first liquid outlet portion 2110 and the second liquid outlet portion 212O share the first diverting portion 223, so that the first liquid outlet portion 2110 and the second liquid outlet portion 212O are adjacent to each other and pass through the first A diverter 223 is separated. With this structure, the first liquid outlet portion 211O and the second liquid outlet portion 212O are independently parallel, ensuring that the first liquid L1 and the second liquid L2 will not be mixed in the connector 2 before reaching the short nozzle 1 Mutual reaction plugs the flow path. Further, the first branch portion 223 extends to a position flush with the end surface of the first liquid outlet portion 2110 on the outlet side.

On the other hand, the first liquid inlet 211I and the second liquid inlet 212I project from the opening on the inlet side of the connector body 21 toward the inlet side, and the first liquid inlet 211I and the second liquid inlet 212I are in the lateral direction A predetermined distance above. In order to stabilize this positional relationship between the first liquid inlet portion 211I and the second liquid inlet portion 212I, in addition to fixing the first liquid inlet portion 211I and the second liquid inlet portion 212I through the connector inlet joint 23, the first liquid inlet A liquid delivery line connection portion 213 is provided between the portion 211I and the second liquid inlet portion 212I. In this embodiment In both, the cross-sectional shape of the first liquid inlet 211I and the cross-sectional shape of the second liquid inlet 212I are circular, preferably, the inner diameter of the first liquid inlet 211I and the inner diameter of the second liquid inlet 212I are both 4mm to 5mm.

In the present embodiment, the connector inlet joint sleeve 231 is engaged with the connector body 21 and covers the opening on the inlet side of the connector body 21. Two connecting piece inlet joint sleeves 231 are provided that are spaced apart from each other in the lateral direction. The two connector inlet joint sleeves 231 are sleeved on the first liquid inlet portion 211I and the second liquid inlet portion 212I, respectively. In this way, the first liquid inlet portion 211I and the corresponding connector inlet connector sleeve 231 form a connector inlet connector 23 that fits with a single-barrel syringe 3, and the second liquid inlet portion 212I and the corresponding connector inlet connector sleeve 231 forms a connection piece inlet joint 23 that cooperates with another single-barrel syringe 3, and each connection piece inlet joint sleeve 231 and the first liquid inlet part 211I and the second liquid inlet part 212I respectively constitute a female body that cooperates with the single-barrel syringe 3 Luer connector structure.

A connector inlet joint sleeve connecting portion 232 connected to both connector inlet joint sleeves 231 is provided between the two connector inlet joint sleeves 231. In addition to fixing the two connector inlet joint sleeves 231, the connector inlet joint sleeve connecting portion 232 is also used to fixedly connect with the base of the snap portion 24.

In this embodiment, the snap portion 24 is fixed to the central position of the inlet joint sleeve connecting portion 232 in the lateral direction, so that the snap portion 24 is located between the two joint inlet joint sleeves 231. The buckle portion 24 includes two buckle arm portions 241 extending linearly (See FIG. 6a) and a buckle protrusion 242 provided at the free end of the buckle arm portion 241 away from the connection part inlet joint sleeve connection portion 232.

The two snap arm portions 241 are spaced apart from each other at a base connected to the connector inlet joint sleeve connecting portion 232 and extend gradually close to each other from the base toward the free end and abut together at the free end.

Each buckle arm portion 241 is provided with a buckle protrusion 242, and the buckle protrusion 242 protrudes from the free end of the buckle arm portion 241 toward both sides in the direction orthogonal to the longitudinal and lateral directions, so that the two Each snap protrusion 242 integrally forms a snap structure.

The specific structure of the connecting member 2 of the double mixed syringe according to the first embodiment of the present invention has been described in detail above, and the structure of the single barrel syringe 3 of the double mixed syringe will be described below.

(Structure of single barrel syringe 3)

In this embodiment, as shown in FIG. 8, the double-mixed syringe includes two side-by-side single-barrel syringes 3, and each single-barrel syringe 3 includes a liquid storage portion 31 for storing liquid and can be performed in the liquid storage portion 31. The piston moves the push-pull rod 32. The single-barrel syringe 3 can be made of transparent or semi-transparent materials such as plastic and glass. Therefore, the double-mixed syringe of this embodiment can be applied to any substance in a liquid form, such as a drug solution or a glue solution.

Specifically, in this embodiment, the liquid reservoir 31 includes a liquid reservoir body 311, a liquid reservoir outlet 312, and a flange 313.

The liquid storage body 311 has a cylindrical shape and is used to store the liquid to be mixed.

The reservoir outlet portion 312 extends from the end of the outlet side of the reservoir body 311 and constitutes a connector inlet sleeve 231 with the connector 2 and the first liquid inlet portion 211I and the second liquid inlet portion 212I, respectively The structure of the female luer joint constitutes the male luer joint structure. In this way, each single-barrel syringe 3 can be in liquid communication with the connector 2 in a sealed manner.

The flange portion 313 is provided at the inlet-side end of the liquid reservoir body 311 and protrudes toward the radial outer side of the liquid reservoir body 311. The flange portion 313 has an oblong outer peripheral contour so that the flange portion 313 has The linear portion of the outer contour can cooperate with the limiting portion 412 of the fixing frame 4 to limit the single-barrel syringe 3.

In the present embodiment, one end of the push-pull rod 32 is located outside the liquid reservoir body 311 as an operation portion, and the other end of the push-pull rod 32 extends into the liquid reservoir body 311. By pushing/pulling one end of the push-pull rod 32, one end of the push-pull rod 32 can make a piston movement inside the reservoir body 311, so that the liquid inside the reservoir body 311 can move accordingly.

The specific structure of the single barrel syringe 3 of the double mixed syringe according to the first embodiment of the present invention has been described above in detail, and the structure of the fixing frame 4 of the double mixed syringe will be described below.

(Structure of fixing frame 4)

In this embodiment, as shown in FIG. 9, the entire fixing frame 4 has a substantially T-shaped structure. The fixing frame 4 includes a lateral portion 41 and a longitudinal portion 42 fixedly connected to the lateral portion 41.

Specifically, in the present embodiment, the lateral portion 41 has a plate-like structure extending in the lateral direction.

The lateral portion 41 has two mounting holes 411 penetrating through the lateral portion 41 on both sides of a portion connected to the longitudinal portion 42. In the present embodiment, one mounting hole 411 corresponds to one single-barrel syringe 3, and the liquid reservoir body 311 of the single-barrel syringe 3 can pass through and be installed in this mounting hole 411. Further, the size of each mounting hole 411 is smaller than the size of the flange portion 313 of the single-barrel syringe 3, so that after the single-barrel syringe 3 is installed in the mounting hole 411, the flange portion 313 does not pass through the mounting hole 411 and can abut on The lateral portion 41, specifically, abuts the surface of the lateral portion 41 opposite to the surface connected to the longitudinal portion 42.

The lateral portion 41 is provided with limit portions 412 on both sides of each mounting hole 411 in the lateral direction. In this embodiment, two limiting portions 412 opposed to each other are provided on both lateral sides of one mounting hole 411. After the reservoir body 311 of the single-barrel syringe 3 is installed in the mounting hole 411, the two limiting portions 412 facing each other can be snapped to the linear portion of the outer contour of the flange portion 313 to restrict the single-barrel syringe 3 Position to prevent the single-barrel syringe 3 from loosening from the holder 4.

In addition, as shown in FIG. 10a, in order to ensure that the limiting portion 412 can be engaged with the flange portion 313, such that the limiting portion 412 and the corresponding central axis of the mounting hole 411 The distance W1 in the lateral direction is less than the maximum distance W2 of the arc portion of the outer contour of the flange portion 313 and the corresponding central axis of the mounting hole 411, preferably less than the straight portion of the outer contour of the flange portion 313 and its corresponding installation The distance in the lateral direction between the central axes of the holes 411.

In the present embodiment, the two longitudinal portions 42 extend from a substantially central portion of the lateral portion 41 in the lateral direction toward one side in the longitudinal direction, and the two longitudinal portions 42 are opposed to each other. At the free ends of the two longitudinal portions 42 away from the lateral portion 41, longitudinal protrusions 421 projecting toward each other are formed, and the two longitudinal portions protrusions 421 together constitute a snap protrusion of the snap portion 24 of the connector 2 From 242 matching structure. In this way, by connecting the protrusion 421 of the longitudinal portion of the fixing frame 4 with the snap protrusion 242 of the connecting member 2, the connecting member 2 and the fixing frame 4 can be fixed together in the longitudinal direction. In this way, undesired rotation of the single-barrel syringe 3 during use is prevented and at the same time, the problems of complicated assembly and easy dispersal of the force of the double-mixed syringe are solved. In addition, this structure replaces the assembly method using screw threads or pull rings in the prior art. The assembly is quick and easy, ensuring that the product is convenient and easy to use, and the buckle assembly can also give the operator feedback on the sound of the assembly. Through the sound, the operator can accurately Determine whether the dual-mixing syringe is assembled.

The specific structure of the fixing frame 4 of the double mixed syringe according to the first embodiment of the present invention has been described in detail above, and the structure of the push-pull rod connecting plate 5 of the double mixed syringe will be described below.

(Structure of push-pull rod connection plate 5)

As shown in FIGS. 1, 10 b and 10 c, the push-pull rod connecting plate 5 is used to connect the push-pull rods 32 of the two single-barrel syringes 3 as a whole, thus enabling the push-pull rods 32 of the two single-barrel syringes 3 to be linked. In the present embodiment, the push-pull rod connecting plate 5 connects the push-pull rod 32 so that the push-pull rod 32 is always aligned.

Specifically, the push-pull rod connecting plate 5 has a groove 51 that fixes the push-pull rod 32 of the single-barrel syringe 3. When the push-pull rod connecting plate 5 is installed, the flange structure of the operation portion of the push-pull rod 32 is installed in the groove 51. The push-pull rod connecting plate 5 positions the push-pull rods 32 of the two single-barrel syringes 3 at the same position (that is, on the same plane), so that the two single-barrel syringes 3 can discharge liquid in equal volumes, thereby achieving uniform mixing of liquids. During the use of the double-mixed syringe, the push-pull rod 32 of each single-barrel syringe 3 can be moved the same distance by applying pushing force and pulling force on the push-pull rod connecting plate 5, so that the same amount can be extracted by pulling force or pushing force liquid.

In this embodiment, the push-pull rod connecting plate 5 has a concave portion 52 corresponding to the shape of a finger. The concave portion 52 may be an arc-shaped depression. The shape of the concave portion 52 may match the shape of an adult’s thumb and match the size, which is convenient for the operator to hold. Improve operating comfort. In addition, the recess 52 can also be designed as a matte structure to enhance the anti-skid function.

The specific structure of each component (short spray head 1, connector 2, single-barrel syringe 3, fixing frame 4 and push-pull rod connecting plate 5) of the double mixed syringe according to the first embodiment of the present invention has been described above, and the following description is combined The drawings illustrate the assembly process between the components in detail.

As shown in FIGS. 10a to 10c, first, insert two single-barrel syringes 3 into the mounting holes 411 of the fixing frame 4, the flange portion 313 of the single-barrel syringe 3 abuts the lateral portion 41 of the fixing frame 4 and makes the convex The edge portion 313 is engaged with the limiting portion 412. In this way, the two single-barrel syringes 3 and the fixing frame 4 achieve a stable connection relationship. When the single-barrel syringe 3 is installed on the fixing frame 4 or before, the push-pull rod connecting plate 5 can be installed on the push-pull rods 32 of the two single-barrel syringes 3.

As shown in FIG. 11a to FIG. 11c, insert the reservoir outlets 312 of the two single-barrel syringes 3 fixed to the fixing frame 4 into the connector inlet connector 23 of the connector 2, so that the two achieve sealed liquid communication; The buckle protrusion 242 of the buckle portion 24 of the connector 2 is engaged with the longitudinal protrusion 421 of the fixing frame 4, so that the connector 2 and the fixing frame 4 are fixed in the longitudinal direction. In the above process, the short spray head 1 can be connected to the connecting member 2 at any time during or after the assembly of the connecting member 2 with the single-barrel syringe 3 and the fixing frame 4. In this way, the double mixing syringe according to the first embodiment of the present invention can be obtained through the above installation process.

The structure and assembly process of the twin-mixing syringe according to the first embodiment of the present invention have been described above, and the structure of the twin-mixing syringe according to the second embodiment of the present invention will be described below with reference to the accompanying drawings.

(Structure of a double mixed syringe according to the second embodiment of the present invention)

As shown in FIG. 12, the double hybrid according to the second embodiment of the present invention The syringe includes a long spray head 6, a connecting member 2, two single barrel syringes 3, a fixing frame 4, and a push-pull rod connecting plate 5. The structure of the connecting piece 2 of the double mixed syringe according to the second embodiment of the present invention, the two single barrel syringes 3, the fixing frame 4 and the push-pull rod connecting plate 5 are respectively mixed with the double combined syringe according to the first embodiment of the present invention The structure of the connecting piece 2 of the syringe, the two single-barrel syringes 3, the fixing frame 4 and the push-pull rod connecting plate 5 are the same, and the difference between the two is that the double mixed syringe according to the second embodiment of the present invention uses a long The nozzle 6 replaces the short nozzle 1. In this way, the double mixing syringe according to the second embodiment of the present invention can be used as a endoscopic double mixing syringe.

In the following, only the differences between the two embodiments will be described, that is, the specific structure of the long shower head 6 will be described below in conjunction with the drawings of the specification.

(Structure of long nozzle 6)

In this embodiment, the long nozzle inlet connector 63 on the inlet side of the long nozzle 6 is used to assemble with the connector outlet connector 22 of the connector 2, and the liquids L1 and L2 from the connector 2 will pass through the connector outlet connector 22 It flows into the long shower head 6 and is finally ejected from the nozzle 62 of the long shower head 6.

As shown in FIGS. 13 to 15b, the long shower head 6 includes a sheath 61, a nozzle 62, a long nozzle inlet joint 63, and a linear shaped body 64 assembled to each other.

Specifically, as shown in FIGS. 14a to 16b, in the present embodiment, the sheath tube 61 has a tubular shape extending linearly and is made of soft plastic or rubber. A first flow path extending in the axial direction of the sheath tube 61 and separated from each other is formed inside the sheath tube 61 611, the second flow path 612 and the molding cavity 613. The first flow path 611, the second flow path 612, and the molding cavity 613 all penetrate the sheath tube 61 in the axial direction of the sheath tube 61.

In the cross-section of the sheath tube 61 taken in the radial direction, the cross-sectional shape of the first flow path 611 and the cross-sectional shape of the second flow path 612 are both arc-shaped and center-symmetrical with respect to the geometric center of the cross-section, which can prevent During the bending of the sheath 61, the cross-sectional areas of the flow paths 611 and 612 are reduced due to the bending force, and the blockage is blocked. Specifically, since the arc-shaped cross-sectional shapes of the first flow path 611 and the second flow path 612 are center symmetrical, two tubular parallel structures are formed in the internal structure of the sheath 61, which has a double-layer bending capability; In the case of the same shape, the sheath 61 has a more excellent ability to maintain the consistency of the cross-section than the conventional non-concentric cross-section variant of the sheath; moreover, due to the support of the molding cavity 613, on the one hand During the bending process, the two-layer cavity formed by the first flow path 611 and the second flow path 612 can be superimposed into a solid structure to enhance the resistance to deformation in the sheath 61. On the other hand, the cross-section is rounded After bending, each of the flow paths 611 and 612 can maintain the original cross-sectional area without major changes, ensuring that the entire sheath 61 has an effective liquid cross section in the first flow path 611 and the second flow path 612, thereby further ensuring The liquid throughput of each flow path 611 and 612 prevents clogging. Through the above connection structure, the first liquid L1 from the connecting member 2 will flow into the first flow path 611 through the long nozzle inlet joint 63 and flow to the nozzle 62 through the first flow path 611, and the second liquid L2 from the connecting member 2 will pass through the long The nozzle inlet joint 63 flows into the second flow path 612 and flows to the nozzle 62 via the second flow path 612.

In the cross section of the sheath tube 61 taken in the radial direction, the molding cavity 613 is circular. The molding cavity 613 is used for accommodating the linear molding body 64 so that the sheath tube 61 can be bent and maintain a predetermined shape. In the present embodiment, the axial center line of the modeling cavity 613 coincides with the axial center line of the sheath tube 61.

As shown in FIGS. 15a to 15b, in the present embodiment, the nozzle 62 is installed at the end of the outlet side of the sheath 61 for the liquids L1, L2 flowing through the sheath 61 to mix in the nozzle 62 and from the nozzle 62 squirting. The nozzle 62 includes a nozzle body 621 and a spiral speed increasing member 622 attached to the nozzle body 621. The structure of the nozzle 62 is similar to the structure of the short nozzle 1 described above, and the only difference between the two is that in this embodiment, the nozzle body 621 does not have the female thread portion M2 of the nozzle body 11 of the short nozzle 1 and the nozzle body The radial dimensions (outer diameter and inner diameter) of 621 are the same over the entire axial length. In this way, the nozzle 62 can also achieve the same function as the short nozzle 1.

In this embodiment, the outer diameter of the end of the outlet side of the sheath tube 61 is smaller than the inner diameter of the nozzle body 621 of the nozzle 62, so that the sheath tube 61 and the nozzle body 621 are assembled by interference fit.

As shown in FIGS. 14 a to 15 b, in this embodiment, the long nozzle inlet joint 63 is attached to the end of the inlet side of the sheath tube 61. The long nozzle inlet connector 63 is used for corresponding assembly with the connector outlet connector 22 of the connector 2. The long nozzle inlet joint 63 includes a long nozzle inlet portion 631 fixed to the inlet-side end of the sheath tube 61 and a length that is attached to the long nozzle inlet portion 631 so as to be rotatable with respect to the long nozzle inlet portion 631 Nozzle 632 at the inlet of the nozzle.

Further, the long nozzle inlet portion 631 includes a first inlet portion 6311, a second inlet portion 6312, and a second diverter portion 6313. When the long nozzle inlet 631 is fixed to the inlet-side end of the sheath 61, the flow path of the first inlet 6311 communicates with the first flow path 611 of the sheath 61, and the flow path of the second inlet 6312 communicates with the sheath The second flow path 612 of the tube 61 communicates.

Furthermore, the second inlet portion 6312 extends closer to the inlet side than the first inlet portion 6311, such that the inlet-side end surface of the second inlet portion 6312 is located closer to the inlet side than the inlet-side end surface of the first inlet portion 6311, Thus, the long nozzle inlet portion 631 forms an inlet step structure that matches the outlet step structure of the connector outlet joint 22. That is, at the entrance portion 631 of the long head, the first entrance portion 6311 forms a concave portion that is recessed with respect to the second entrance portion 6312. Through the cooperation of the inlet step structure and the outlet step structure, the two inlet portions 6311, 6312 of the long nozzle inlet portion 631 of the long nozzle 6 and the two liquid outlet portions 2110, 212O of the connector of the connector 2 of the connector 2 are connected Accurate docking.

The second diverter 6313 extends to a position flush with the inlet-side end surface of the first inlet portion 6311 and forms a second seal on the inlet-side end surface of the first inlet portion 6311 and the inlet side end surface of the second diverter portion 6313 Circle 6311O groove. When the long nozzle inlet portion 631 and the connector outlet joint 22 are assembled together, the second sealing ring 6311O is also installed in the second groove 211C of the connector outlet joint 22. In this way, the portion where the first inlet portion 6311 of the long nozzle inlet portion 631 and the first liquid outlet portion 2110 of the connector outlet joint 22 abut each other is sealed so that the first liquid L1 and the second liquid L2 are removed from the connector outlet joint 22 When flowing into the inlet portion 631 of the long head, there is no mixing and reaction occurs, which effectively prevents the liquids L1 and L2 from mixing and reacting in advance before reaching the nozzle 62 of the long head 6 to cause clogging. That is, the two inlet portions 6311, 6312 of the long nozzle inlet portion 631 of the long nozzle 6 and the two liquid outlet portions 2110, 212O of the connector outlet joint 22 of the connector 2 are butted in a state of being isolated from each other .

In this embodiment, the cross-sectional shape of the first inlet 6311 and the cross-sectional shape of the second inlet 6312 are both semicircular.

In addition, an outer circumferential surface of the long nozzle inlet portion 631 is also formed with an annular sealing protrusion 6314 that radially protrudes toward the long nozzle inlet portion sleeve 632. The sealing protrusion 6314 abuts the long nozzle inlet portion sleeve 632 for Further prevent liquid leakage. At the sealing protrusion 6314, the friction force in the circumferential rotation is small, thereby ensuring that the long nozzle entrance 631 and the long nozzle entrance sleeve 632 keep smooth and labor-saving during the rotation process, which is convenient for the long nozzle 6 to be disassembled at any time and Assemble. The end surface on the entrance side of the first entrance portion 6311 is formed with a second seal ring 6311O that protrudes toward the entrance side and extends over the entire circumference along the circumferential direction of the first entrance portion 6311. In the present embodiment, the second seal ring 6311O is integrally formed as a protrusion with the body portion of the first inlet 6311.

As shown in FIG. 14c, in this embodiment, the long nozzle inlet sleeve 632 has a substantially cylindrical shape and the long nozzle inlet sleeve 632 is capable of The head inlet 631 is fitted around the long head inlet 631 so as to rotate.

The inner diameter of the long nozzle inlet sleeve 632 decreases from the inlet side toward the outlet side and the long nozzle inlet sleeve 632 includes a sleeve body 6321 and a connector outlet joint 22 provided on the inner peripheral wall of the cylindrical shape The male screw portion 6322 of the male screw portion 221 fits, and the outlet flange 6323 protruding inward at the outlet of the sleeve body 6321. The internal thread portion 6322 is provided at an approximate center in the axial direction of the sleeve body 6321, and the inner diameter of the sleeve body 6321 at the outlet flange 6323 is smaller than the outer diameter of the long nozzle inlet portion 631.

In this way, the long nozzle inlet connector 63 formed by the cooperation between the long nozzle inlet portion 631 and the long nozzle inlet sleeve 632 constitutes a female luer connector structure matched with the male luer connector structure of the connector outlet connector 22. When the long nozzle inlet connector 63 and the connector outlet connector 22 are assembled together, the first inlet portion 6311 of the long nozzle inlet connector 63 corresponds to the first liquid outlet portion 2110 of the connector outlet connector 22, and the long nozzle inlet connector The second inlet portion 6312 of 63 corresponds to the second liquid outlet portion 212O of the connector outlet connector 22, and the second diverter portion 6313 abuts the first diverter portion 223 so that the inlet head 63 of the long nozzle and the connector outlet During the assembly of the joint 22, no mis-assembly occurs and the first liquid L1 and the second liquid L2 do not mix at the part where they are assembled to block the flow path. Even if the pressure of the liquid in the first flow path 611 and the second flow path 612 reaches 1 MPa, the first liquid L1 and the second liquid L2 will not leak.

As shown in FIGS. 17a to 17d, in this embodiment, the linear shaped body 64 extends in a linear shape, and the linear shaped body 64 includes the linear shaped body main body housed in the modeling cavity 613 of the sheath 61 641 and a flat positioning portion 642 that is provided at the entrance-side end of the linear molded body 641 and extends from the sheath 61.

In this embodiment, the linear shaped body 64 is a metal wire. In order to facilitate the installation of the metal wire, the metal wire is designed to have a circular cross section.

During the bending process of the metal wire with a round cross section, the deformation of the sheath 61 and the hardness of the metal wire may be different, resulting in inconsistent deformation of the metal wire and the deformation of the sheath 61, resulting in a shape The wire rotates. If the sheath 61 cannot prevent the rotation of the metal wire in the internal structure, the sheath 61 may be separated from the sheath 61 during the initial bending process and cannot be deformed simultaneously, that is, the user cannot effectively control the sheath The amount of 61 bending deformation. In addition, if you want to re-shape the sheath 61 or straighten the sheath 61 that has been bent, it will not be changed because of the separation of the modeling wire and the sheath 61, or the modeling wire rotates. Bent shapes. Therefore, in the present embodiment, the positioning portion 642 is fitted into the second diverter portion 6313. By embedding the positioning portion 642 in the second diverting portion 6313, there is no need to reserve installation space for the positioning portion 642, and the diameter of the long nozzle inlet portion 631 can be greatly reduced, making it smaller and more precise. During use, the entrance of the long nozzle 631 is not too large to block the line of sight. On the other hand, when the sheath 61 is assembled with other, the volume of the entire product can be made smaller and it is more convenient to use. In addition, the The position portion 642 can also prevent the linear shaped body 64 from rotating during the bending force, and at the same time limits the movement of the linear shaped body 64 in the axial direction, so that the linear shaped body 64 cannot move up and down in series, and the sheath 61 Driven by the linear molding body 64, the molding can be bent at will and restored to straight or reverse bending, for example, so that the sheath 61 maintains the two shapes shown in FIGS. 18a and 18b.

In addition, as shown in FIG. 17b, the length W3 of the radial section of the linear molding body 641 of the positioning portion 642 is larger than the diameter of the linear molding body 641, and the diameter of the linear molding body 641 of the positioning portion 642 The length W4 in the upward section is smaller than the diameter of the linear shaped body 641.

The specific technical solutions of the present invention have been described in detail above, but what needs to be supplemented is:

1. Although not described in the above specific embodiments, it can be understood that the two single-barrel syringes 3 are preferably pre-packaged liquid syringes, and the two single-barrel syringes 3 preferably have identification information corresponding to the liquid they are loaded with. For example, in the case of using pre-filled usage, the single-barrel syringes 3 can be filled with a specified type of liquid, and a rubber cap is put on the liquid outlet of the liquid storage portion 31 of each single-barrel syringe 3 to encapsulate to prevent Liquid flows out. Further, in order to facilitate the user to identify different liquids, each single-barrel syringe 3 may be provided with identification information corresponding to the liquid, for example, the push-pull rods 32 of two single-barrel syringes 3 may use different colors.

2. Although not described in detail in the above specific embodiments, but The technical solution of the present invention can achieve the following beneficial effects.

2.1 About the short nozzle 1

The short spray head 1 provided by the present invention can be well applied to the case where the initial pressure of the liquid is less than 0.1 MPa and has a good atomization effect. By adding the spiral speed-increasing member 12 through the pressure chamber S1 in the short nozzle 1, the flow velocity of the liquid in the flow channel S is increased, and at the same time, the laminar flow channel S2 and the axial cavity S3 are increased to increase the liquid pressure and the fluid pressure in the injection chamber S4 It is already dozens of times the initial pressure, which can adapt the diameter of the injection chamber S4 to increase, reduce the risk of clogging during use, and have a good atomization effect, while reducing the difficulty of processing.

The short nozzle 1 uses the superposition principle of centrifugal atomization and axial atomization at the same time, and accelerates the flow of liquid into the laminar flow channel S2 through the acceleration of the swirl formed by the liquid flowing in the swirl acceleration channels S11, S12. The arc-shaped branch channel S22 of the flow channel S2 further accelerates the liquid, and finally forms a Venturi water film outside the nozzle, the water film tears in the air to form droplets, and the droplets appear misty, and regularly from the nozzle hole portion S5 Start to form a conical distribution, suitable for ultra-low pressure range less than 0.1MPa, has a good atomization effect, and simple assembly.

Since the use of the spiral speed-increasing member 12 makes the mixed liquid travel longer in the swirl acceleration channels S11 and S12, the mixing time and distance of the mixed liquid in this interval are increased, so that the two liquids have sufficient time and space. mixing. Because the swirl acceleration channels S11 and S12 increase the flow velocity and pressure of the liquid, at the same time, the spray of the short nozzle 1 The diameter of the cavity S4 is relatively small, the diameter of the ejected droplet is smaller, the atomization effect is more obvious, and the thickness of the chemical liquid coating layer is thinner. This effect allows the user to better control the thickness of the spray and save more mixed liquid.

2.2 About connectors 2

The connector 2 provided by the present invention is suitable for both spraying type and cavity mirror type usage modes, and the two usage modes can be quickly switched by simply replacing different spray heads 1 and 6. The connector 2 provided by the present invention can be directly adapted to the short spray head 1 to form a spray-type double-mixed syringe, or can be adapted to the long spray head 6 to form a cavity mirror-type double-mixed syringe, so it can be used to fill two liquids at a time Different modes of use.

2.2.1 About the sealing structure between the connecting piece 2 and the short nozzle 1 or the long nozzle 6

The connection member 2 and the short spray head 1 can realize the sealing structure between the connection member 2 and the short spray head 1 through the first sealing ring 22O, thereby forming a sealing effect to prevent liquid leakage.

Sealing structures are provided at two locations between the connector 2 and the long shower head 6. First, the connecting member 2 and the long nozzle 6 can realize the sealing structure between the connector outlet joint 22 and the long nozzle inlet sleeve 632 through the first sealing ring 22O, thereby preventing the connection member outlet joint 22 and the long nozzle inlet part The liquid leaking at the butting position of 631 leaks out through the gap between the connector outlet joint 22 and the long nozzle head inlet sleeve 632. Second, the second groove 211C provided on the outlet side end surface of the first liquid outlet portion 2110 of the connector 2 and the second seal ring provided on the inlet side end surface of the first inlet portion 6311 6311O constitutes a sealed structure, which can effectively isolate the flow path formed by the first liquid outlet 2110 and the first inlet 6311 from the flow path formed by the second liquid outlet 212O and the second inlet 6312, ensuring two flow paths Will not communicate with each other, or independent and parallel state. In addition, an outer circumferential surface of the long nozzle inlet portion 631 is formed with an annular sealing protrusion 6314 that protrudes toward the long nozzle inlet portion 632. The sealing protrusion 6314 abuts the long nozzle inlet portion sleeve 632 to form a sealing structure , For further preventing the liquid leaking from the joint position of the connector outlet joint 22 and the long nozzle inlet 631 from the gap between the long nozzle inlet 631 and the long nozzle inlet sleeve 632.

Through the above sealing structure, an effective sealing can be achieved between the connector 2 and the long shower head 6.

2.2.2 About the accurate docking of the flow path between the connector 2 and the long nozzle 6

As shown in FIG. 19, the exit step structure provided by the connecting member 2 cooperates with the entrance step structure provided by the long nozzle 6 to ensure that each time the screw thread is tightened, it will not affect the exact docking position of the connector 2 and the long nozzle 6. During the tightening process, the connection part 2 catches the long nozzle entrance portion 631 of the long nozzle 6 without rotating, and the long nozzle entrance sleeve 632 rotates and tightens.

In this way, it is ensured that during the connection process of the long nozzle 6 and the connector 2, the joint angle between the flow path in the connector 2 and the flow path in the long nozzle 6 will not deviate due to the action of tightening the thread, and no misalignment will occur. And cause the liquid medicine to mix here in advance.

3. About the long nozzle 6

During use, two different types of liquids smoothly enter the long nozzle 6, flow through the two flow paths 611, 612 in the long nozzle 6, and then enter the nozzle 62 of the long nozzle 6. The nozzle 62 is located at the end of the long nozzle 6 on the outlet side, and serves to mix the two liquids and spray. When the liquid flows smoothly to the nozzle 62, the two liquids are merged into one, in the nozzle 62, the same swirling flow as the short nozzle 1 is accelerated, and the atomized small droplets are sprayed from the nozzle 62 to achieve thin-layer spraying. effect.

4. All the parts used in the double mixed syringe provided by the present invention can be made of plastic materials, there are more choices in the sterilization method, EO sterilization can be used, and gamma ray sterilization can be more efficient.

5. Preferably, the long nozzle inlet portion 631 and the sheath tube 61 may be formed as an integral piece and integrally formed, and the sheath tube 61 and the long nozzle inlet portion 631 may be manufactured through an injection molding process.

The following provides a preparation method that can realize the integral formation of the long nozzle inlet 631 and the sheath 61, and the preparation method includes the following steps: S1: using an extrusion die to prepare the sheath 61 having flow paths 611, 612 and a molding cavity 613 S2: the linear shaped body 64 is pre-installed in the modeling cavity 613 of the sheath 61, and one end of the linear shaped body 64 extending out of the sheath 61 is designed to be flat to obtain the positioning portion 642; and S3: The sheath tube 61 with the linear shaped body 64 installed is put into a vertical injection mold to inject the long nozzle inlet 631 to obtain the integral piece of the long nozzle inlet 631 and the sheath tube 61.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still classified as This invention covers the patent.

2‧‧‧Connector

22‧‧‧Connector outlet joint

3‧‧‧Single barrel syringe

4‧‧‧Fixing frame

5‧‧‧Push-pull rod connecting plate

6‧‧‧long nozzle

62‧‧‧Nozzle

63‧‧‧Long nozzle inlet connector

Claims (18)

A nozzle for a double-mixing syringe is suitable for two liquids to flow in and spray out the liquid. The nozzle includes a nozzle body and a spiral speed-increasing member. The spiral speed-increasing member is accommodated in the nozzle body. The nozzle body and the spiral speed increasing member jointly form a flow channel penetrating in the axial direction, the flow channel includes: a pressure chamber, and at least two spiral flow acceleration channels extending spirally are formed in the pressure chamber to make the inflow The liquid in the at least two swirling acceleration channels can form a swirling flow and accelerate; a laminar flow channel, the laminar flow channel includes a converging portion and at least three arcs extending radially outward from the converging portion Branch channel, the diameter of the converging portion is smaller than the diameter of the pressure chamber, the converging portion communicates with the pressure chamber through the at least three arc-shaped branch channels, and the liquid from the pressure chamber can pass through the At least three arc-shaped branch channels are further accelerated into the converging portion to form a vortex; an axial cavity, the diameter of the axial cavity is smaller than the diameter of the pressure cavity, the axial cavity and the converging portion are in direct communication And a spray chamber, the diameter of the spray chamber is smaller than the diameter of the shaft cavity, the spray cavity is directly communicated with the shaft cavity, the liquid from the shaft cavity can flow into the spray cavity and Ejected from the ejection cavity. The nozzle for a double mixed syringe according to claim 1, wherein at the end of the arc-shaped branch channel communicating with the pressure chamber, the outer side wall of each arc-shaped branch channel is formed and the pressure chamber is formed The side wall of the tangent; and/or at the end of the arc-shaped branch channel communicating with the converging portion, formed The outer side wall of each arc-shaped branch channel is tangent to the side wall forming the converging portion. The nozzle for a double mixed syringe according to claim 1 or 2, wherein the spiral speed increasing member is accommodated in the pressure chamber and includes: a spiral speed increasing member main body, the spiral speed increasing member main body having The axially extending cylindrical shape, the axial end surface of the spiral speed increasing member body is pressed against the axial end surface of the pressure chamber; and a plurality of external thread portions, the plurality of external thread portions are increased from the spiral The outer peripheral surface of the speed member body protrudes radially outward, and the plurality of externally threaded portions extend parallel to each other and spirally to form the spiral between the plurality of externally threaded portions and the side wall forming the pressure chamber Flow acceleration channel. The nozzle for a double mixed syringe according to claim 1, wherein the ratio of the diameter of the injection chamber to the diameter of the axial cavity is in the range of 1:4 to 2:3, and/or the laminar flow The diameter of the convergent portion of the channel is equal to the diameter of the axial cavity, and the ratio of the dimension of the laminar flow channel in the axial direction to the dimension of the axial cavity in the axial direction is 1:1 . A duplex mixing syringe includes a connector, including a connector body, a connector outlet joint protruding from the connector body toward the outlet, and a connector from the connector body toward the inlet A side projection inlet connector; a short nozzle and/or a long nozzle connected to the outlet connector of the connector, the short nozzle having the double mixing syringe according to any one of claims 1 to 4 With a nozzle, the long nozzle has the nozzle for the double mixing syringe according to any one of claims 1 to 4; Two single-barrel syringes, the two single-barrel syringes are connected to the connector inlet joint of the connector; and a fixing frame is used to fix the two single-barrel syringes and to the connecting member Together. The double mixed syringe according to claim 5, wherein the fixing frame has a T-shaped structure, the fixing frame includes a lateral portion extending in a lateral direction and a substantially central portion in a lateral direction from the lateral portion A longitudinal portion extending longitudinally, the lateral portion is formed with two mounting holes arranged along the lateral direction, the two single-barrel syringes are respectively inserted into the two mounting holes and mounted to the two mounting holes, and the The lateral portion further includes at least two limiting portions provided on both lateral sides of each of the mounting holes, the limiting portion is snapped onto the flange portion of the single barrel syringe, so that the single barrel syringe is fixed to the Described fixed frame. The double mixing syringe according to claim 6, wherein the two longitudinal portions extend opposite to each other and the free ends of the two longitudinal portions away from the lateral portion form longitudinal portions protruding toward each other The protruding block makes the protruding block of the longitudinal portion cooperate with the snap-fitting portion of the connecting member to fix the relative position of the fixing frame and the connecting member at least in the longitudinal direction. The double mixed syringe according to claim 6, wherein the distance between the limit portion and the central axis of the corresponding mounting hole is smaller than the maximum distance between the outer contour of the flange portion and the central axis. The double mixed syringe according to claim 5, wherein the outer peripheral surface of the connector outlet joint is formed with a male threaded portion, so that the connector outlet joint constitutes a male Luer joint structure, and the male threaded portion is Double thread unit. The double mixed syringe according to claim 5, wherein the connecting member includes a snap portion extending from the main body portion of the connecting member toward the inlet side, and the snap portion includes a snap arm portion extending linearly And a buckle protrusion provided on the free end of the buckle arm portion away from the main body of the connector. The dual mixed syringe according to claim 5, wherein at the outlet joint of the connecting piece, a first liquid outlet portion through which the first liquid from one of the single-barrel syringes flows and another The second liquid outlets through which the second liquid of the single-barrel syringe flows are arranged side by side without communicating with each other, and the first liquid outlet extends to the outlet side of the second liquid outlet so that the first The end face of the outlet side of a liquid outlet part is closer to the outlet side than the end face of the outlet side of the second liquid outlet part, so that the outlet joint of the connecting member forms an outlet step structure; the long nozzle includes a long nozzle inlet, the The long nozzle inlet portion includes a first inlet portion and a second inlet portion arranged side by side with each other, the second inlet portion extending closer to the inlet side than the first inlet portion, such that the inlet side of the second inlet portion The end face is closer to the inlet side than the inlet side end face of the first inlet part, so that the long nozzle forms an inlet step structure for matching the outlet step structure of the outlet joint of the connector, and the long nozzle passing through the long nozzle The inlet step structure of the inlet part cooperates with the outlet step structure of the connector outlet joint of the connector, so that the first inlet part of the inlet part of the long nozzle and the first liquid outlet part of the connector outlet joint accurately dock and The second inlet portion of the inlet portion of the long spray head is accurately butted with the second liquid outlet portion of the outlet joint of the connector. The double mixing syringe according to claim 11, wherein the long nozzle further includes a sheath tube, and a first flow path and a second flow path separated from each other are formed inside the sheath tube and the sheath tube The end portion on the inlet side is fixed to the inlet portion of the long nozzle so that the first flow path communicates with the flow path of the first inlet portion and the second flow path and the flow path of the second inlet portion In communication, the nozzle is installed at the end of the outlet side of the sheath tube so that the liquid flowing through the sheath tube is mixed at the nozzle and ejected from the nozzle. The double mixing syringe according to claim 12, wherein the nozzle body of the long nozzle further includes a mounting cavity for engaging with the sheath tube, the mounting cavity communicating with the pressure cavity and located at the pressure On the axial side of the cavity, the diameter of the mounting cavity is smaller than the diameter of the sheath tube, so that the sheath tube and the nozzle body are assembled together in an interference fit manner. The double mixed syringe according to claim 12, wherein a molding cavity, which is separated from both the first flow path and the second flow path, is further formed inside the sheath tube, and the molding cavity A linear molding body for molding the sheath tube is housed therein, and the linear molding body includes a linear molding body body and an end provided on the linear molding body body and extending from an end surface on the inlet side of the sheath tube The flat positioning portion is fixed to the entrance of the long nozzle. The duplex mixing syringe according to claim 11, wherein the outer circumferential surface of the outlet joint of the connecting member is formed with a first groove for mounting an annular first sealing ring. The duplex mixing syringe according to claim 15, wherein the end surface on the outlet side of the first liquid outlet portion forms a ring-shaped second sealing ring The second groove. The duplex mixing syringe according to claim 16, wherein a second sealing ring is provided on an end surface of the first inlet portion of the long nozzle and the outlet of the connector is connected to the outlet of the long nozzle When assembled together, the second seal ring abuts against the second groove provided on the end face of the outlet side of the first liquid outlet part. The duplex mixing syringe according to claim 11, wherein the distance between the end face on the outlet side of the first liquid outlet and the end face on the outlet side of the second liquid outlet is 0.5 mm to 20 mm.

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