CN110604844B

CN110604844B - Rotation-free loading needle cylinder with protective sleeve end cover and injector system

Info

Publication number: CN110604844B
Application number: CN201910551870.0A
Authority: CN
Inventors: 张小元; 李燕
Original assignee: Nanjing Jusha Display Technology Co Ltd; Nanjing Jusha Medical Technology Co Ltd
Current assignee: Nanjing Jusha Display Technology Co Ltd; Nanjing Jusha Medical Technology Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2022-06-03
Anticipated expiration: 2039-06-25
Also published as: CN110604844A

Abstract

The invention relates to the technical field of medical instruments, in particular to a rotation-free loading needle cylinder with a protective sleeve and an injector system, which comprises: the syringe barrel body comprises a barrel body far end, a barrel body near end and a barrel body center section, the barrel body far end comprises an injection neck and a conical surface, the barrel body center section is a barrel body with the same outer diameter and inner diameter in the whole section, the barrel body near end comprises a barrel body of the barrel body center section and an interface with a plurality of grooves, the barrel body is fixedly connected with the protective sleeve through the interface with the grooves, the piston comprises the conical surface, a sealing ring, a step of a clamping sealing ring and a circular boss with the step, the sealing ring is matched with the step of the clamping sealing ring, and the push rod and the boss are locked through the step. The invention is applied to equipment such as tomography equipment (CT), magnetic resonance equipment (MRI), digital subtraction angiography equipment (DSA) and the like, improves the user experience and saves the installation time of the user.

Description

Rotation-free loading needle cylinder with protective cover end cover and injector system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a rotation-free loading needle cylinder with a protective sleeve end cover and an injector system.

Background

In many medical diagnostic and therapeutic procedures, a doctor or other person injects a contrast media into a patient in conjunction with Computed Tomography (CT), Digital Subtraction Angiography (DSA), magnetic resonance system (MR) imaging to assist in the diagnosis of the doctor.

Contrast agents are typically delivered by manual or automatic injection devices, through veins or arteries to a detection site, and images of the desired tissue site are obtained by absorbing X-rays or changing the signal strength of the tissue in the volume under magnetic resonance, which can be displayed on a monitor and recorded. The typical manual injection consists of a contrast medium source, a physiological saline source, a syringe capable of being pushed manually and a connecting pipeline. The contrast medium or saline is manually aspirated by the operator, and then the injection is manually performed by the operator. The flow rate, pressure and injection volume of the whole injection process are influenced by the force and technology of an operator, and the pressure required by injection is higher because the fluid is more viscous and the speed is required to be higher during injection; the operator often does this, resulting in fatigue and inaccurate control of pressure and flow rate. Therefore, the existing injection system in a high-pressure injection environment generally needs a pressure protection sleeve and a corresponding fixing support, and the space occupied by the syringe fixing support is generally large, so that the size of the injection system is heavy, and the mounting operation of the syringe is inconvenient.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a rotation-free loading syringe with a protective sleeve end cover and an injector system, which can improve the experience of a user and save the installation time of the user.

The invention is realized by the following steps: a non-rotating loading syringe and injector system with protective sheath end caps comprising: the syringe body comprises a distal end of the syringe body, a proximal end of the syringe body and a central section of the syringe body, wherein the distal end comprises an injection neck and a conical surface, the central section is a whole section of the syringe body with the same outer diameter and inner diameter, and the proximal end comprises a syringe body with an inner diameter slightly larger than that of the central section and a connector with a plurality of grooves; the cylinder body is connected with the protective sleeve by means of an interface with a plurality of grooves so as to be fixed and not rotate, the piston consists of a conical surface, a sealing ring, a step for clamping the sealing ring and a plurality of elastic clamping claws, the sealing ring is matched with the step for clamping the sealing ring, and the push rod is locked with the elastic clamping claws so as to drive the piston to move back and forth.

Furthermore, the near end of the cylinder body is provided with a plurality of groove interfaces, and the shape of the groove interfaces is not limited and can comprise sawteeth, circles, rectangles, trapezoids and the like.

Furthermore, the tail end of the elastic claw of the piston is provided with a convex arc surface or other convex structures which interact with the push rod when the push rod retreats, and the elastic claw of the piston has elasticity in the radial direction and can be bounced off when the push rod is jointed or disconnected.

Furthermore, the syringe protective sleeve consists of a protective sleeve end cover and a protective sleeve main body and is used for protecting the syringe from injection in a 1200psi environment;

furthermore, the protective sleeve end cover is matched with the syringe body and the protective sleeve main body, and the syringe body can penetrate through the protective sleeve end cover and is tightly matched with the conical surface of the syringe body, and meanwhile, the protective sleeve end cover is connected with the protective sleeve main body in a rotating mode, a threaded mode and the like; the protective sleeve main body consists of a cylinder body with the same outer diameter and a near end with a rotary flange, and is connected with the cylinder body of the cylinder and the protective sleeve end cover in a matching way.

Further, the connection between the protective sheath end cover and the protective sheath main body is in a threaded connection form, but not limited to this form, and may also include a form in which the slider rotates to a position for connection, the number of the elastic claws of the piston may be multiple, usually 6, and the size of the inner wall of at least 2 protective sheath end covers is consistent with the conical surface of the syringe barrel body, and is tightly fitted, and the outlet of the protective sheath end cover may pass through the injection neck of the syringe barrel body.

Furthermore, the inner wall of the near end of the protective sleeve forms a bulge which is contacted with the near end of the syringe, so that the syringe can be limited to move backwards in the axial direction and rotate around the axial direction.

Further, the connection form of the protective sleeve body and the injector is a slide block rotation to position form or a thread connection.

Furthermore, the push rod comprises a push rod far end, a push rod near end and a push rod middle section, wherein the push rod far end is provided with an end surface recess and is engaged with the piston in a radial movement mode.

Furthermore, the end face of the push rod is sunken to form a step, and an opening is formed in one direction.

According to the high-pressure injection device and the high-pressure injection system, the injection detection state and the automatic control device are arranged, so that the injection dosage, the liquid flow rate, the pressure parameters, the multi-stage injection and the like can be accurately controlled in the injection process, and more benefits are provided for operators and patients.

Drawings

FIG. 1 is a schematic view of a syringe with a protective cover for rotational-free loading according to an embodiment of the present invention;

FIG. 2 is a schematic view of a syringe mounting arrangement according to an embodiment of the present invention;

FIG. 3 is a schematic view of a syringe having a plurality of grooves at a proximal end and a flange at a proximal end according to an embodiment of the present invention;

FIG. 4 is an exploded view of the piston in an embodiment of the present invention;

FIG. 5 is a schematic view of a non-rotating piston according to an embodiment of the present invention;

FIG. 6 is a schematic view of an embodiment of a pressure jacket of the present invention;

FIG. 7 is a schematic view of an end cap of a pressure protection sleeve in an embodiment of the invention;

FIG. 8 is a schematic structural diagram of a push rod provided in an embodiment of the present invention;

FIG. 9 is a schematic view of the installation effect of the non-rotating syringe system provided in the embodiment of the present invention;

FIG. 10 is a schematic view of a non-rotating syringe piston coupled to a plunger according to an embodiment of the present invention;

in the drawings: 1-a syringe body; 10-the proximal end of the barrel; 11-barrel central section; 12-a barrel distal end; 100-grooves; 2-a piston; 20-sealing ring; 21-a piston body; 210-a boss; 211-step; 212-conical surface; 3-a protective sheath body; 30-bulge; 31-an inner wall flange; 32-an outer wall flange; 33-barrel distal end; 4-protective sleeve end cover; 40-round holes; 41-a connecting structure; 5-a push rod; 50-end surface concave; 51-open mouth; 6-syringe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-10, the present invention provides a non-rotating loading syringe and injector system with a protective cover end cap, comprising: the syringe body comprises a far end of the syringe body, a near end of the syringe body and a central section of the syringe body, wherein the far end comprises an injection neck and a conical surface, the central section is a whole section of the syringe body with the same outer diameter and inner diameter, and the near end comprises a syringe body with an inner diameter slightly larger than that of the central section and a connector with a plurality of grooves. The cylinder body is connected with the protective sleeve by means of an interface with a plurality of grooves so as to be fixed and not rotate, the piston consists of a conical surface, a sealing ring, a step for clamping the sealing ring and a plurality of elastic clamping claws, the sealing ring is matched with the step for clamping the sealing ring, and the push rod is locked with the elastic clamping claws so as to drive the piston to move back and forth.

The near end of the cylinder body is provided with a plurality of groove interfaces, and the shape of the groove interfaces is not limited and can comprise saw-tooth shapes, circular shapes, rectangular shapes, trapezoidal shapes and the like.

The tail end of the elastic claw of the piston is provided with a convex arc surface or other convex structures which interact with the push rod when the push rod retreats, and the elastic claw of the piston has elasticity in the radial direction and can be bounced off when the push rod is jointed or disconnected.

The needle cylinder protective sleeve consists of a protective sleeve end cover and a protective sleeve main body and is used for protecting the needle cylinder from injection in a 1200psi environment;

the protective sleeve end cover is matched with the syringe body and the protective sleeve main body, the syringe body can penetrate through the protective sleeve end cover and is tightly matched with the conical surface of the syringe body, and meanwhile, the protective sleeve end cover is connected with the protective sleeve main body in a rotating mode, a threaded mode and the like; the protective sleeve main body consists of a cylinder body with the same outer diameter and a near end with a rotary flange, and is matched and connected with the cylinder body of the cylinder and the protective sleeve end cover.

The connection between the protective sleeve end cover and the protective sleeve main body is in a threaded connection mode, but not limited to the threaded connection mode, the connection can also comprise a mode that a sliding block rotates to a position, the number of the elastic claws of the piston can be multiple, usually 6, and the size of the inner wall of at least 2 protective sleeve end covers is consistent with the conical surface of the syringe barrel body and is tightly matched with the conical surface of the syringe barrel body, and the outlet of the protective sleeve end cover can pass through the injection neck of the syringe barrel body.

The inner wall of the near end of the protective sleeve forms a bulge which is contacted with the near end of the syringe, so that the syringe can be limited to move backwards in the axial direction and rotate around the axial direction.

The connection form of the protective sleeve main body and the injector is a slide block rotation to position form or a threaded connection.

The push rod comprises a push rod far end, a push rod near end and a push rod middle section, wherein the push rod far end is provided with an end surface recess and is engaged with the piston in a radial movement mode.

The end face of the push rod is sunken to form a step, and the opening is arranged in one direction.

Specifically, as shown in fig. 1, the appearance of the syringe with a protective cover and without rotation loading is shown. The main components of the device are a high-pressure injection system syringe and a protective sleeve, as shown in fig. 2, the device comprises a syringe body 1, a piston 2, a protective sleeve main body 3 and a protective sleeve end cover 4.

As shown in fig. 2, the barrel is composed of a distal end 12, a proximal end 10, and a central section 11: the distal end consists of an injection neck and a conical surface, the central section is a cylinder with the same outer diameter and inner diameter, and the proximal end consists of a cylinder with an inner diameter slightly larger than that of the central section and a connector with a plurality of grooves 100.

As shown in FIG. 3, the number of the grooves is not limited, and may be one or more. The shape may be rectangular, saw-toothed, trapezoidal, or arcuate.

The groove at the proximal end of the syringe can be a flange, and the number of the grooves is not limited, and can be one or more. The shape may be rectangular, saw-toothed, trapezoidal, or arcuate.

Referring to fig. 4 and 5, a non-rotating piston includes a base 20, a jaw body 21, and a seal ring 22. The jaw body is characterized in that the jaw body is provided with a plurality of extending jaws 210 which can bend and rebound in the radial direction, and the inner side of the tail end of the jaw body is provided with a bulge 211.

The end of the elastic claw 210 of the piston is provided with a convex arc surface (211) or other convex structures, so that the convex is arranged on a circular ring.

The number of the elastic claws of the piston is at least 2.

Referring to fig. 6 and 7, a syringe jacket for protecting a syringe from injection at 1200psi is comprised of a jacket end cap and a jacket body.

As shown in fig. 5, the syringe sheath body is cylindrical and has a protrusion 30 on the inner wall of its proximal end to limit the rearward axial movement of the syringe.

The proximal end of the body of the barrel shield has a flange 31 on its inside wall that engages a groove in the barrel to limit axial rotation of the barrel. The number of the flanges is not limited, and may be one or more. The shape may be rectangular, saw-toothed, trapezoidal, or arcuate.

The groove on the inner wall of the proximal end of the protective sheath, which is engaged with the proximal interface of the syringe, can be a flange, and the number of the grooves is not limited, and can be one or more. The shape may be rectangular, saw-toothed, trapezoidal, or arcuate.

The outer wall of the sleeve body also has a flange 32 which is generally in the shape of a circumferentially uniform thickness projection. Which are generally two parts of symmetry.

The distal end 33 of the body is attached to the end cap of the sheath by means including, but not limited to, a threaded connection, a flange twist lock, etc.

As shown in fig. 6, the protective cover is a cavity formed by the proximal end of a segment of cylinder and the distal end of a segment of cone, and the size of the inner wall of the protective cover is consistent with the conical surface of the syringe body and is tightly matched with the conical surface of the syringe body.

The inner wall of the proximal end of the end cap of the protective sleeve contains, but is not limited to, a connection structure 41 such as threads or a flange. The outer wall has raised or recessed formations 42 to facilitate manual tightening of the end cap for rotation. The shape is generally striated in the axial direction.

The distal tip of the protective sheath end cap is provided with a circular hole 40 for passage through the injection neck of the syringe. The circular hole is positioned at the central position of the end cover conical part and is axially oriented.

The syringe is contained within the body of the sheath and is restrained from rotating and moving axially rearward. The protective sleeve end cover can enable the syringe body to penetrate through the protective sleeve end cover and be tightly matched with the conical surface of the syringe body, and meanwhile, the protective sleeve end cover is connected with the protective sleeve main body in a rotating mode, a threaded mode and the like.

Referring to fig. 8, a push rod, which is generally cylindrical in shape, has an arcuate recess (51) formed in the outer circumferential surface of the end thereof to form a ring shape, and has a transition slope (50) on the outer side and end surface of the recess. The annular recess is engaged with the annular protrusion of the piston to drive the piston to move back and forth.

As shown in fig. 9 and 10, the operation method of the system: the plunger is loaded into the barrel, noting that the jaws of the plunger are in the proximal position of the barrel. The rear end of the barrel is then loaded from the front of the shield and an attempt is made to rotate the barrel to the end (at which point the rear end of the barrel contacts the flange portion of the inner wall of the rear end of the shield) until the barrel can no longer rotate (at which point the rear recess or flange of the barrel engages the flange or recess of the shield). The sleeve end caps are then fitted and secured tightly where they are locked by structural engagement such as threads or flanges. The loaded assembly is then loaded into the syringe 6. Note that the end of the plunger rod of the syringe is retracted to an extreme position prior to loading the assembly. The orientation is noted when pushing the boot, and when the boot rear end reaches a defined position, it is rotationally fixed (via the boot outer wall flange to the syringe). Finally, the push rod is extended slowly until the push rod engages the piston. The annular recess at the end of the push rod contacts the annular projection of the piston catch after engagement.

When the push rod is connected with or disconnected from the piston, the piston must be at the back end of the syringe, and the claws can be in the springing-open position. When the piston is in the syringe, the claw cannot be bounced off due to the limit of the syringe wall, and the piston cannot be engaged with or disengaged from the push rod.

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

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An injector system comprising a non-rotating load syringe having a protective sheath, the syringe comprising: the syringe body consists of a far end of the syringe body, a near end of the syringe body and a central section of the syringe body, wherein the far end consists of an injection neck and a conical surface, the central section is a whole section of the syringe body with the same outer diameter and inner diameter, and the near end consists of a syringe body with an inner diameter slightly larger than that of the central section and a connector with a plurality of grooves; the cylinder body is connected with the protective sleeve by virtue of an interface with a plurality of grooves so as to be fixed and not rotate, the piston consists of a conical surface, a sealing ring, a step for clamping the sealing ring and a plurality of elastic clamping claws, the sealing ring is matched with the step for clamping the sealing ring, and the push rod is locked with the elastic clamping claws so as to drive the piston to move back and forth;

the near end of the cylinder body is provided with a plurality of groove interfaces, and the shape of each groove interface is any one of sawtooth, circle, rectangle or trapezoid;

the tail end of the elastic claw of the piston is provided with a convex structure which interacts with the push rod when the push rod retreats, and the elastic claw of the piston has elasticity in the radial direction and can be bounced off when the push rod is jointed or disconnected;

the protective sleeve end cover and the protective sleeve main body form a needle cylinder protective sleeve for protecting the needle cylinder from injection in a 1200psi environment;

the protective sleeve end cover is matched with the syringe body and the protective sleeve main body, and the syringe body can penetrate through the protective sleeve end cover and is tightly matched with the conical surface of the syringe body, and meanwhile, the protective sleeve end cover is connected with the protective sleeve main body in a threaded mode; the protective sleeve main body consists of a cylinder body with the same outer diameter and a near end with a rotary flange, and is matched and connected with the cylinder body of the cylinder and the protective sleeve end cover;

the number of the elastic claws of the piston is multiple, the size of the inner wall of the protective cover end cover is consistent with that of the conical surface of the syringe body and is tightly matched, and the outlet of the protective cover can pass through the injection neck of the syringe body;

the inner wall of the near end of the protective sleeve forms a bulge which is contacted with the near end of the needle cylinder, so that the needle cylinder can be limited to move backwards in the axial direction and rotate around the axial direction;

the connecting mode of the protective sleeve main body and the injector is a mode that a sliding block rotates to a position or is in threaded connection;

the push rod comprises a push rod far end, a push rod near end and a push rod middle section, and the push rod far end is provided with an end surface recess and is engaged with the piston in a radial movement mode;