CN113304353B - Syringe with spiral shearing mechanism - Google Patents

Abstract

The present disclosure provides an injector for artificial bone material, which includes a syringe for containing fluid, a push rod disposed in the syringe and movable along the syringe, a cover covering a nozzle of the syringe, and a needle mounted at one end of the syringe and communicated with the syringe, wherein the cover has a through hole, the push rod has a rod body, a piston disposed at one end of the rod body and located in the syringe, and a holding part disposed at the rod body, and a transition section having an inner diameter gradually reduced is formed between the syringe and the needle, wherein when the syringe contains fluid and the push rod moves from a first position to a second position of the syringe, the fluid is extruded from the needle through a helical shearing device. The spiral shearing mechanism is a screw extrusion structure which is a protrusion or a groove which is formed on the inner wall of the needle head and has a double-spiral structure, so that the resistance of the injector during fluid injection can be reduced, and the fluid injection can be facilitated.

Description

Syringe with spiral shearing mechanism

This application is filed as a divisional application for a syringe having a syringe title of viscous and incompressible fluid having application number 2020108324771, application date 18/08/2020.

Technical Field

The present disclosure relates specifically to a syringe with a helical shear mechanism.

Background

Syringes are a common tool. As early as the 15 th century, kathler, italian, proposed the principle of a syringe, primarily using a needle to withdraw or inject a gas or liquid. Syringes are used in a wide variety of applications, and syringes may be used in medical devices, containers, and for injection through rubber septa in some scientific instruments used in chromatography.

The existing injector has a simple structure and is often used for injecting gas or liquid. When the existing injector injects fluid with larger viscosity, the problem that the existing injector has larger resistance and is not easy to inject is usually encountered.

Disclosure of Invention

The present disclosure has been made in view of the above-mentioned state of the art, and an object thereof is to provide an injector having a helical shear mechanism that can reduce resistance to facilitate fluid injection.

To this end, the present disclosure provides an injector for viscous and incompressible fluid, comprising a syringe for containing the fluid, a plunger disposed in and movable along the syringe, the plunger having a rod body, a plunger disposed at one end of the rod body and located in the syringe, and a grip portion disposed on the rod body, a cover covering a nozzle of the syringe, and a needle mounted at one end of the syringe and communicating with the syringe, the cover having a through hole through which the plunger is movable along an inside of the syringe from a first position of the syringe away from the needle to a second position close to the needle, the rod body having a first thread on an outer circumference thereof, an inner wall of the through hole having a second thread cooperating with the first thread, the plunger being moved in the syringe by rotating the plunger; a helical shear mechanism is disposed within the needle, the barrel having an inner diameter greater than the needle and a transition section having a gradually decreasing inner diameter formed between the barrel and the needle, wherein when the barrel contains the fluid and the ram moves from the first position to the second position of the barrel, the fluid is forced out of the needle by the helical shear mechanism and the fluid experiences shear forces from the helical shear mechanism as the fluid flows through the helical shear mechanism.

In the present disclosure, a syringe for viscous and incompressible fluids includes a barrel, a ram, a cap, and a needle. The syringe is used for containing fluid; the push rod is arranged in the needle cylinder and can move along the needle cylinder, the push rod is provided with a rod body, a piston which is arranged at one end of the rod body and is positioned in the needle cylinder and a holding part which is arranged on the rod body, and the push rod can move from a first position of the needle cylinder far away from the needle head to a second position close to the needle head along the inner part of the needle cylinder through a through hole of the cover body; the syringe needle is installed in the one end of cylinder and is communicated with the cylinder, is provided with spiral shearing mechanism in the syringe needle, and the internal diameter of cylinder is greater than the internal diameter of syringe needle to be formed with the internal diameter and reduce the changeover portion that reduces gradually between cylinder and syringe needle. When the syringe contains fluid and the ram moves from the first position to the second position of the syringe, fluid is expressed from the needle by the helical shear mechanism. This can reduce the resistance of the syringe when injecting the fluid, and can facilitate the injection of the fluid.

In addition, in the syringe related to the present disclosure, optionally, a scale line is provided on a side of the cylinder adjacent to the needle. In this case, it is possible to facilitate determination of the injection amount of the injector.

In addition, in the syringe according to the present disclosure, optionally, an outer diameter of the piston is not smaller than an inner diameter of the cylinder. In this case, it is possible to ensure that the piston moves in the cylinder and to suppress the fluid from flowing out of the piston at the time of injection.

In addition, in the syringe according to the present disclosure, optionally, the cap has a groove provided with a thread, and the cap is fixed to the cylinder by the groove in a threaded manner. This enables the cap to be fixed to the cylinder in a better manner.

In addition, in the injector related to the present disclosure, optionally, the syringe includes a hollow cylinder wall, a connecting portion connected to the needle, and a blocking mechanism disposed on an outer periphery of the hollow cylinder wall and preventing the syringe from following the push rod when the injector performs injection. This can advantageously prevent the syringe from following the ram as it advances.

In addition, in the syringe according to the present disclosure, it is preferable that the stopper mechanism is provided to be used in cooperation with the grip portion, and the stopper mechanism is a slip-preventing strip or a finger grip portion. This can facilitate the operator to better secure the barrel while the injector is injecting.

In addition, in the syringe according to the present disclosure, the connection part may be connected to the needle by screwing so that the inner diameter of the needle is matched to the inner diameter of the connection part. This enables the needle to be fitted better to the barrel.

In addition, in the injector related to the present disclosure, optionally, an inner contour of the transition section is tapered or rounded in a cross section along an axial direction of the cylinder. Whereby the resistance to injection of fluid can be reduced.

In addition, in the syringe according to the present disclosure, the helical cutting mechanism may be a screw extrusion structure or a rotor structure provided on an inner wall of the needle. . In this case, the resistance of the fluid inside the needle can be reduced, facilitating a better injection of the fluid.

Further, in the syringe according to the present disclosure, optionally, the needle has an inner diameter of 2 to 6mm. Thereby enabling the injector to better inject fluid.

According to the present disclosure, an injector for viscous and incompressible fluids is provided that can reduce resistance to facilitate injection of the fluids.

Drawings

Fig. 1 is a perspective view of a syringe showing a viscous and incompressible fluid according to an embodiment of the present disclosure.

Fig. 2 is an exploded view of a syringe showing a viscous and incompressible fluid according to an embodiment of the present disclosure.

Fig. 3 is a cross-sectional view of a syringe showing a viscous and incompressible fluid according to an embodiment of the present disclosure.

Fig. 4 is a perspective view of a syringe and needle connection in an injector illustrating a viscous and incompressible fluid according to an embodiment of the present disclosure.

Fig. 5 is a perspective view illustrating a cap of a syringe for viscous and incompressible fluid according to an embodiment of the present disclosure.

Fig. 6 is a partial cross-sectional view of a syringe showing a viscous and incompressible fluid according to embodiments of the present disclosure at the cap.

Fig. 7 is a partial cross-sectional view of a syringe showing a viscous and incompressible fluid at the needle according to embodiments of the present disclosure.

Fig. 8 is a perspective view showing a needle according to an embodiment of the present disclosure.

Fig. 9 illustrates a cross-sectional view of fig. 8 according to an embodiment of the present disclosure.

Fig. 10 is a partial sectional view showing a needle according to another embodiment of the present disclosure.

Fig. 11 is a perspective view showing a rotor structure in fig. 10 according to the embodiment of the present disclosure.

Fig. 12 is a partially enlarged view of fig. 11 according to the embodiment of the present disclosure.

Fig. 13 (a) and 13 (b) are perspective views showing different orientations of unit bodies of a rotor structure according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

It is noted that the terms "comprises" and "comprising," and any variations thereof, in this disclosure, such that a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present disclosure presents a syringe for viscous and incompressible fluids. In the present disclosure, an injector for viscous and incompressible fluids is capable of reducing the resistance to injection fluid to facilitate fluid injection. The syringe to which the present disclosure relates may be used to extract or inject fluids. In some examples, the fluid may be a fluid having a viscosity. In some examples, the fluid may be an incompressible fluid. For example, the fluid may include, but is not limited to, artificial bone material used in medical procedures. But examples of the present disclosure are not limited thereto, and the syringe of the present disclosure can also be used to extract or inject gas or liquid, etc.

Fig. 1 is a perspective view of a syringe 10 showing a viscous and incompressible fluid according to an embodiment of the present disclosure. Fig. 2 is an exploded view of syringe 10 showing a viscous and incompressible fluid according to embodiments of the present disclosure.

In the present disclosure, an injector 10 for viscous and incompressible fluids to which the present disclosure relates (which may be referred to simply as injector 10) may include a barrel 110, a ram 120, and a needle 130 (see fig. 1 and 2). The syringe 110 may be used to contain a fluid, among other things. The push rod 120 may be disposed within the syringe 110 and movable along the syringe 110. Needle 130 may be mounted at one end of barrel 110 and in communication with barrel 110. The needle 130 may be provided with a helical cutting mechanism 134 (see fig. 7). In this case, the operator can push or rotate the push rod 120 to make the fluid contained in the cylinder 110 flow out from the needle 130 communicating with the cylinder 110 via the helical shear mechanism 134, thereby injecting the fluid, whereby the resistance of the injector in injecting the fluid can be reduced and the injection of the fluid can be facilitated.

In some examples, as described above, the injector 10 may include a syringe 110 (see fig. 1 and 2). In some examples, the syringe 110 may be elongated. For example, the syringe 110 may have a cylindrical shape, a prismatic shape, or other irregular shapes. Preferably, as shown in fig. 1 and 2, the cylinder 110 may have a cylindrical shape.

In some examples, syringe 110 may be made of plastic or glass.

In some examples, the barrel wall of the syringe 110 may be transparent. In this case, the control of the injection amount can be facilitated.

Fig. 3 is a cross-sectional view of syringe 10 illustrating a viscous and incompressible fluid according to embodiments of the present disclosure. In some examples, as shown in fig. 3, the syringe 110 may pass through in the axial direction. That is, the cylinder 110 may have a through hole along the axial direction.

In some examples, the through-hole 110a of the syringe 110 may have a circular, square, or other irregular shape. Preferably, the penetration hole 110a of the cylinder 110 may have a circular shape.

In some examples, one end of the barrel 110 may be in communication with a needle 130 (described later). The other end of the cylinder 110 may be provided with a push rod 120 (described later). In some examples, syringe 110 may be used to contain fluids.

In some examples, as shown in fig. 1 and 3, the syringe 110 may include a hollow barrel wall 112. In some examples, a blocking mechanism 114 may be disposed on the hollow cartridge wall 112. In some examples, the blocking mechanism 114 may be used to prevent the syringe 110 from following the ram 120 as the injector 10 injects. That is, an operator may prevent slippage of the syringe 110 by the blocking mechanism 114 while pushing or rotating the push rod 120. In some examples, the blocking mechanism 114 may be configured to be used in conjunction with a grip 123 (described later). In this case, the operator holds the grip 123 and the blocking mechanism 114 in hand, respectively, while using the syringe 10, thereby enabling the operator to better use the syringe 10.

In some examples, the blocking mechanism 114 may be disposed at an outer periphery of the hollow cartridge wall 112 (see fig. 1). In some examples, blocking mechanism 114 may be disposed on a side of hollow cartridge wall 112 away from needle 130. Examples of the disclosure are not limited in this regard and in some examples, the blocking mechanism 114 may be disposed in the middle of the hollow cartridge wall 112 or on a side near the needle 130.

In some examples, the blocking mechanism 114 may be a slip-resistant stripe (see fig. 1). In other examples, the blocking mechanism 114 may be a finger grip, such as a hand hole and a hand grip protrusion. This can facilitate the operator to better secure the syringe 110 while the injector 10 is injecting.

In some examples, as shown in fig. 1, the outer circumference of the hollow cartridge wall 112 may be provided with graduation marks. In some examples, the graduation marks may be disposed on a side of the hollow barrel wall 112 proximate the needle 130. In this case, it can be facilitated to determine the injection amount of the injector 10.

Fig. 4 is a perspective view illustrating a connection portion between a cylinder 110 and a needle 130 of the syringe 10 for viscous and incompressible fluid according to an embodiment of the present disclosure.

In some examples, as shown in fig. 2 and 4, the syringe 110 may include a connection 113. The connecting portion 113 may be connected with the needle 130. In some examples, the connection portion 113 may be cylindrical. In some examples, the axis of the connection 113 may be coaxial with the axis of the hollow cartridge wall 112. In some examples, the connection portion 113 may be integrally formed with the hollow cartridge wall 112.

In some examples, as shown in fig. 2 and 3, the connection portion 113 may penetrate in the axial direction. That is, the connection portion 113 may have a through hole along the axial direction. In some examples, the through hole of the connection portion 113 may have a circular shape.

In some examples, as shown in fig. 4, the connection portion 113 may include a first barrel 1131 and a second barrel 1132. In some examples, the first cylinder 1131 may be disposed within the second cylinder 1132, and a certain gap (described in detail later) may exist between the first cylinder 1131 and the second cylinder 1132. In some examples, the axis of first cylinder 1131 may be coaxial with the axis of second cylinder 1132.

In some examples, the inner diameter of the first barrel 1131 of the connection 113 may be no greater than the inner diameter of the hollow barrel wall 112. In some examples, if the inner diameter of the first cylinder 1131 is smaller than the inner diameter of the hollow cylinder wall 112, the end of the hollow cylinder wall 112 near the connection portion 113 can be connected with the connection portion 113 in a tapered manner. Specifically, if the inner diameter of the first cylinder 1131 is smaller than the inner diameter of the hollow cylinder 112, the syringe 110 gradually contracts from the end of the hollow cylinder 112 close to the connection portion 113 until the inner diameter of the syringe 110 is equal to the inner diameter of the first cylinder 1131. In this case, hollow barrel wall 112 and first barrel 1131 can be connected to form barrel 110, and barrel 110 can be better fitted with needle 130.

In some examples, the second cylinder 1132 may be disposed between the tapered portion between the hollow cylinder wall 112 and the first cylinder 1131. In some examples, the length of the second barrel 1132 may be no greater than the length of the first barrel 1131. Examples of the present disclosure are not limited thereto, and the length of the second cylinder 1132 may be greater than that of the first cylinder 1131.

In some examples, the second barrel 1132 may have threads on an inner wall thereof. In this case, the second barrel 1132 may be fixed to the needle 130 (described later) by screw coupling. Examples of the present disclosure are not limited thereto, and the second barrel 1132 may have no thread on an inner wall thereof, and the syringe 110 may be connected to the needle 130 in other manners (described later).

In some examples, as shown in fig. 1 and 2, the injector 10 may include a pushrod 120. The push rod 120 may be disposed within the syringe 110. The push rod 120 may move along the length of the syringe 110. In some examples, the ram 120 may be slidably or rotationally movable along the length of the syringe 110. In some examples, ram 120 may move along the length of barrel 110 from a first position 111a (see fig. 1) of barrel 110 away from needle 130 to a second position 111b (see fig. 1) near needle 130. In some examples, the target distance between first location 111a and second location 111b may be no greater than the length of hollow cylinder wall 112.

In some examples, as shown in fig. 2, the pushrod 120 may have a rod body 121. In some examples, shaft 121 may be elongated. In some examples, the outer diameter of the rod body 121 may be no greater than the inner diameter of the hollow cylinder wall 112. Thereby, it can be ensured that the rod body 121 can move in the cylinder 110. In some examples, the length of the stick body 121 may be no less than the target distance.

In some examples, as shown in fig. 2, the outer circumference of the rod body 121 may be provided with a first thread. In some examples, the inner wall of the hollow cartridge wall 112 may be provided with threads that mate with the first threads. Thereby, the lever 121 can be rotationally moved along the longitudinal direction of the cylinder 110. Examples of the present disclosure are not limited thereto and, in some examples, the syringe 10 may be provided with a cap 140. The cover 140 may be provided with a screw thread (described later) to be engaged with the first screw thread.

In some examples, as shown in fig. 2, one end of the rod body 121 may be provided with a piston 122. In some examples, piston 122 may be integrally formed with rod 121. In other examples, the piston 122 may be connected to the rod 121 by screwing, clipping, or adhering.

In some examples, the piston 122 may be disposed in the syringe 110 and may move in the syringe 110 following the rod body 121. In some examples, the shape of the piston 122 may be the same as the shape of the through-bore of the syringe 110 (e.g., the hollow barrel wall 112). In some examples, the piston 122 may be made of an elastic material. In some examples, the width of the piston 122 perpendicular to the axis of the syringe 110 may be no less than the inner diameter of the hollow barrel wall 112, i.e., the outer diameter of the piston 122 may be no less than the inner diameter of the syringe 110. For example, the width of the piston 122 perpendicular to the axis of the syringe 110 may be equal to or slightly larger than the inner diameter of the hollow barrel wall 112. In this case, it is possible to ensure that the piston 122 can move in the syringe and to suppress the fluid from flowing out of the piston 122 during injection.

In some examples, the sum of the length of the piston 122 in the axial direction of the syringe 110 and the length of the rod body 121 may be not less than the target distance.

In some examples, the other end of the rod body 121 may be provided with a grip 123. In some examples, grip 123 may be located on the exterior of syringe 110 when injector 10 is in operation. In some examples, the grip portion 123 may be formed in a handle shape, for example, a T-shaped handle or a circular hanging hole (see fig. 1). In some examples, the grip 123 may be integrally formed with the rod body 121. In some examples, the grip 123 may be connected to the rod body 12 by screwing, snapping, or adhering.

Fig. 5 is a perspective view of the cap 140 of the syringe 10 showing a viscous incompressible fluid according to the embodiment of the present disclosure.

In some examples, as shown in fig. 1 and 2, syringe 10 may be provided with a cap 140. In some examples, the cover 140 may be cylindrical (e.g., prism, cylinder, or plum blossom, etc.). In some examples, the outer circumference of the cover 140 may be provided with an anti-slip structure.

In some examples, as shown in fig. 5, the cover 140 may be provided with a through hole 141. The rod body 121 can pass through the through hole 141. In some examples, the rod body 121 may be partially disposed in the cylinder 110 through the penetration hole 141 when the injector 10 is operated (described later in detail).

In some examples, cap 140 may be disposed at an end of barrel 110 distal to needle 130.

Fig. 6 is a partial cross-sectional view of the syringe 10 at the cap 140 illustrating a viscous and incompressible fluid according to embodiments of the present disclosure. Fig. 6 is an enlarged view of the area a in fig. 3.

In some examples, cap 140 may be integrally formed with syringe 110. Examples of the present disclosure are not limited thereto, and in some examples, as shown in fig. 5 and 6, the cover 140 may be provided with a groove 142. In some examples, the recess 142 may be an annular groove. The shape of the recess 142 may be the same as the shape of the hollow cartridge wall 112. In some examples, the sidewalls of groove 142 may be parallel to the axial direction of syringe 110. In some examples, the outer diameter of the structure formed by the side wall of the groove 142 away from the outer periphery of the cap body 140 (also referred to as the "inner side wall") can be no greater than the inner diameter of the hollow cartridge wall 112.

In some examples, cap 140 may be secured to barrel 110 by a snap-fit connection (not shown) via groove 142. Specifically, the shape of the groove 142 may be the same as the shape of the hollow cartridge wall 112. The recess 142 is an annular groove. The width between the two sidewalls of the groove 142 (i.e., the width of the groove 142) may be equal to the thickness of the hollow cylinder wall 112. The cap 140 may form a snap-fit structure with the hollow cylindrical wall 112 via the groove 142.

In other examples, the cover 140 may be fixed to the syringe 110 by a screw-coupling manner. For example, the cap 140 may be fixed to the cylinder 110 in a screw manner by means of the groove 142 (see fig. 5 and 6). The side wall of recess 142 near the periphery of cap 140 (also referred to as the "outer side wall") may be provided with threads and the periphery of the end of barrel 110 distal to needle 130 may be provided with threads that mate with the threads. Or the side wall of recess 142 remote from the periphery of cover 140 (also referred to as the "inside wall") may be provided with threads and the inside wall of the end of barrel 110 remote from needle 130 may be provided with threads that mate with the threads. This enables cover 140 to be fixed to syringe 110. In some examples, the threads provided on the sidewalls of the groove 142 may be compression threads. Therefore, the problem of rotation of the cover body 140 when the pressure in the syringe 110 changes can be avoided.

In some examples, as shown in fig. 1 and 3, the cover 140 may be fixed on the syringe 110, and the rod body 121 may be disposed in the syringe 110 through the penetration hole 141 of the cover 140. In some examples, the inner diameter of the through hole 141 of the cover 140 may be not smaller than the outer diameter of the rod body 121. In some examples, as shown in fig. 2 and 6, if the outer circumference of the rod body 121 is provided with a first thread, the inner wall of the through hole 141 of the cover body 140 may be provided with a second thread engaged with the first thread. In this case, the push rod 120 can be rotated to move along the length direction of the cylinder 110, whereby a large pushing force can be provided and the injection amount of the injector 10 can be more precisely controlled.

As described above, in the present disclosure, when the injector 10 injects fluid, the operator may hold the holding portion 123 and the blocking mechanism 114 respectively, and may rotate or push the push rod 120 to inject fluid.

In some examples, as shown in fig. 1 and 2, syringe 10 may include a needle 130. In some examples, needle 130 extends lengthwise therethrough. That is, the needle 130 has a through hole 130a penetrating in the longitudinal direction. In some examples, needle 130 may be mounted at one end of barrel 110. Specifically, the needle 130 may be mounted at the connection 113 of the cylinder 110. In some examples, needle 130 may be in communication with barrel 110. That is, the penetration hole 130a may communicate with the penetration hole 110a of the cylinder 110 (see fig. 3). In this case, it is possible to make the fluid enter the needle 130 from the cylinder 110 and flow out of the needle 130 to complete the injection as the push rod 120 moves at the time of injection.

Fig. 7 is a partial cross-sectional view of syringe 10 at needle 130 illustrating a viscous and incompressible fluid according to embodiments of the present disclosure. Fig. 7 is an enlarged view of a region B in fig. 3.

In some examples, as shown in fig. 4 and 7, the needle 130 may include a needle tip 131 and a securing portion 132. In some examples, the needle tip 131 may be integrally formed with the fixing portion 132. In some examples, the needle 130 may be coupled (e.g., threaded) with the coupling portion 113.

In some examples, needle 130 may be integrally formed with barrel 110. In other examples, the needle 130 may be connected to the connecting portion 113 of the syringe 110 through the fixing portion 132. The connection may be, for example, a snap connection or a screw connection.

In some examples, the fixing portion 132 and the connection portion 113 may be connected by a screw connection. For example, as shown in fig. 4 and 7, the fixing portion 132 may have a cylindrical shape. The fixing portion 132 may have a through structure. The fixing portion 132 may have a third cylinder 1321. The inner diameter of the third cylinder 1321 may be not smaller than the outer diameter of the first cylinder 1131. The outer circumference of the third cylinder 1321 may be provided with a thread, and the inner wall of the second cylinder 1132 may be provided with a thread engaged with the thread. In this case, the third barrel 1321 may be fixed in the gap between the first barrel 1131 and the second barrel 1132 by a screw coupling manner. Thereby enabling the connection portion 113 to be connected with the needle 130 by a screw coupling manner.

In some examples, the fixing portion 132 and the connection portion 113 of the syringe 110 may be connected by a snap structure (not shown). For example, the fixing portion 132 may have a cylindrical shape, and the fixing portion 132 may have a through structure. The fixing portion 132 may have a third cylinder 1321, and the inner diameter of the third cylinder 1321 may be equal to the outer diameter of the first cylinder 1131. The shape of the third barrel 1321 may have the same shape as the gap between the first and second barrels 1131 and 1132. The thickness of the third barrel 1321 may be equal to or slightly greater than the width of the gap between the first and second barrels 1131 and 1132. In this case, third barrel 1321 may be snapped into a gap between first barrel 1131 and second barrel 1132. Thus, the fixing portion 132 can be connected to the cylinder 110 by a snap-fit connection.

In some examples, as shown in fig. 7, the third barrel 1321 may be a pass-through structure. First barrel 1131 may be disposed within third barrel 1321 such that barrel 110 may communicate with needle 130 when connector 113 is connected to needle 130. In some examples, the length of the third barrel 1321 may be no greater than the depth of the gap. But examples of the present disclosure are not limited thereto, and the length of the third cylinder 1321 may be greater than the depth of the gap.

In other examples, the needle 130 may be connected to the connecting portion 113 by the fixing portion 132 and the connecting portion 113 through adhesion.

In some examples, as shown in fig. 7, when the needle 130 is mounted to the cylinder 110, the inner diameter of the through hole 110a of the cylinder 110 may be equal to the inner diameter of the through hole 130a at the place where the cylinder 110 communicates with the needle 130.

In some examples, as shown in fig. 4, the fixing part 132 may have a mounting aid 1322. In this case, the needle 130 can be held while being mounted to the cylinder 110 by an operator, and the mounting by the operator can be facilitated.

In some examples, the installation assistance piece 1322 may be formed on the outer circumference of the third barrel 1321 on the side close to the needle tip 131. In some examples, the installation assistance piece 1322 may be a non-slip structure formed on the outer circumference of the third cylinder 1321. For example, the mounting aide 1322 may be an elongated, semi-circular, or oval shaped handle (see fig. 4). The installation aids 1322 may also be skid-resistant strips. In some examples, the mounting aide 1322 may also be prismatic or cylindrical (not shown). The attachment auxiliary 1322 may have a through hole having the same shape and outer diameter as the third cylindrical body 1321. The third barrel 1321 may be disposed within the mounting aid 1322. The axis of the installation assistant member 1322 may be coaxial with the axis of the third cylinder 1321. In this case, it can be convenient for an operator to connect the fixing part 132 with the connecting part 113 by holding the installation assistance piece 1322.

In some examples, the installation assistant 1322 may be integrally formed with the third barrel 1321.

In some examples, as shown in fig. 4, the needle tip 131 may be disposed on the fixing portion 132.

In some examples, the needle tip 131 may be cylindrical. In some examples, the needle tip 131 may be formed into an elliptical shape at a port away from the fixing portion 132 by chamfering on a cylinder. In some examples, the needle tip 131 may pass through in an axial direction. In some examples, the needle tip 131 may be in communication with the fixation portion 132.

In some examples, the needle tip 131 may be connected to and communicate with the connection part 113 through the fixing part 132. In some examples, the inner diameter of the needle tip 131 may be no greater than the inner diameter of the barrel 110. In some examples, the inner diameter of the needle 130 may be 2-6 mm. Thereby facilitating better injection of fluid by syringe 10.

In some examples, as shown in fig. 7, when the minimum inner diameter of the barrel 110 is greater than the inner diameter of the needle tip 131, a transition section 133 having a gradually decreasing inner diameter may be formed between the barrel 110 and the needle tip 131. In some examples, the transition segment 133 may be formed in the fixation portion 132 (see fig. 7 and 10). Specifically, needle 130 may have a portion with a maximum inner diameter, a portion with a target inner diameter, and a transition segment 133. The maximum inner diameter of needle 130 may be the same as the inner diameter of first barrel 1131. The target inner diameter may be the final desired inner diameter of the syringe 10, i.e., the inner diameter of the needle tip 131 (e.g., 2-6 mm). Needle 130, having the largest inner diameter portion, may be in communication with first barrel 1131. The transition segment 133 may be disposed between the portion having the largest inner diameter and the portion having the target inner diameter to enable the two portions to communicate.

Examples of the present disclosure are not limited thereto, and in some examples, the transition segment 133 may also be formed on the syringe 110 (e.g., the first barrel 1131) (not shown).

In some examples, the inner profile of the transition segment 133 may be tapered or rounded in cross-section along the axial direction of the syringe 110. Whereby the resistance to injection of fluid can be reduced.

In some examples, a helical cutting mechanism 134 may be disposed within the needle 130. In some examples, the helical cutting mechanism 134 may protrude relatively from the inner wall of the needle 130. In this case, as the fluid flows through the helical shear mechanism 134, the fluid may be subjected to the shear forces of the helical shear mechanism 134. This reduces the resistance of the fluid inside the needle 130, which facilitates better injection of the fluid. But examples of the present disclosure are not limited thereto and the helical cutting mechanism 134 may be relatively recessed in the inner wall of the needle 130.

In some examples, the helical cutting mechanism 134 may be integrally formed with the needle 130. Examples of the disclosure are not limited thereto and in some examples, the helical cutting mechanism 134 may be disposed within the needle 130 by way of an adhesive or snap fit, or the like.

Fig. 8 is a perspective view illustrating the needle 130 according to the embodiment of the present disclosure. Fig. 9 illustrates a cross-sectional view of fig. 8 according to an embodiment of the present disclosure.

In some examples, the helical shearing mechanism 134 may be implemented as a screw extrusion structure 1341 (see fig. 8 and 9).

In some examples, the screw extrusion structure 1341 may be a protrusion formed on an inner wall of the needle 130 and having a double spiral structure (see fig. 8 and 9). For example, the protrusion 1341a and the protrusion 1341b may be formed on the inner wall of the needle tip 131, and the protrusion 1341a and the protrusion 1341b may be formed in a double spiral structure.

In some examples, the screw extrusion structure 1341 may be formed by a plurality of sets of protrusions in a double helix structure, and two adjacent sets of protrusions may not be connected to each other or may be present at a distance. That is, the protrusions of the double spiral structure formed on the inner wall of the needle 130 may be discontinuous to form the screw extrusion structure 1341 (see fig. 8 and 9). For example, as shown in fig. 8, the screw extrusion structure 1341 may be formed by a plurality of sets of protrusions having a double spiral structure, wherein the protrusions 1341a and 1341b may have a double spiral structure, the protrusions 1341c and 1341d may have a double spiral structure, and neither the protrusions 1341a nor the protrusions 1341b may be connected to the protrusions 1341c and 1341d, so that the plurality of sets of protrusions having a double spiral structure may form the screw extrusion structure 1341.

Examples of the present disclosure are not limited thereto, and in some examples, the screw extrusion structure 1341 may be formed by a set of protrusions having a continuous and double spiral structure, that is, the protrusions having a double spiral structure formed on the inner wall of the needle 130 may be continuous to form the screw extrusion structure 1341 (not shown). In other examples, one of the projections in the double helix may be continuous and formed on the inner wall of the needle, and the other may be discontinuous. That is, the discontinuous protrusions may be formed by combining a plurality of sets of protrusions, and may be formed as a double helix structure with the continuous protrusions, respectively (not shown).

In other examples, the screw extrusion structure 1341 may also be a groove (not shown) formed on the inner wall of the needle 130 and having a double spiral structure.

In other examples, the screw extrusion structure 1341 may also be a protrusion or a groove (not shown) formed on the inner wall of the needle 130 and having a single spiral structure. I.e., the needle 130 is formed with threads on the inner wall thereof.

Fig. 10 is a partial sectional view illustrating a needle 130 according to another embodiment of the present disclosure. Fig. 11 is a perspective view illustrating the rotor structure 1342 of fig. 10 according to the embodiment of the present disclosure. Fig. 12 is a partially enlarged view of fig. 11 according to the embodiment of the present disclosure. Fig. 13 (a) and 13 (b) are perspective views showing different orientations of a unit body 1342a of a rotor structure 1342 according to an embodiment of the present disclosure. Fig. 12 may be a partially enlarged view of the region S in fig. 11.

In some examples, the helical shear mechanism 134 may be implemented as a rotor structure 1342 (see fig. 10 and 11). In some examples, the rotor structure 1342 may be disposed within the through hole 130a of the needle 130.

In some examples, the rotor structure 1342 may include a plurality of unit cells 1342a. In some examples, the unit cell 1342a may be helical. In some examples, the unit cell 1342a may be formed by rotating two sides of one rectangle by 180 degrees with respect to each other along a center line (see fig. 13).

In some examples, the unit body 1342a may be disposed within the needle 130. In some examples, the rotor structure 1342 may be formed from a plurality of unit cells 1342a (see fig. 11). For example, a plurality of unit cells 1342a may be arranged and connected together to form a rotor structure 1342.

In some examples, the positions at which adjacent two unit cells 1342a are connected in the rotor structure 1342 may be different (see fig. 12). In some examples, adjacent unit bodies 1342a may be rotated relative to each other by 90 degrees. However, the present disclosure is not limited thereto, and in some examples, the positions where the adjacent two unit bodies 1342a are connected in the rotor structure 1342 may be the same (not shown). In some examples, a plurality of unit cells 1342a may be arranged and connected together to form a channel for fluid communication (see line 13421 in fig. 11). For example, as shown in fig. 11 and 12, a plurality of unit bodies 1342a may be sequentially connected together to form a rotor structure 1342, wherein a line 13421 may indicate a channel formed by the plurality of unit bodies 1342a, the connection position or the placement orientation of two adjacent unit bodies 1342a1 and 1342a2 may be different, and the unit bodies 1342a1 and 1342a2 may be relatively rotated by 90 degrees, that is, the unit bodies 1342a2 may be rotated by 90 degrees to obtain the orientation corresponding to the unit bodies 1342a 1.

In some examples, a plurality of unit bodies 1342a may be integrally formed to form the rotor structure 1342. Examples of the disclosure are not so limited and in some examples, a plurality of unit cells 1342a may be connected together by other means to form the rotor structure 1342. For example, a plurality of unit bodies 1342a may be bonded together to form a rotor structure 1342.

In some examples, the unit body 1342a forming the rotor structure 1342 may be sized and shaped to match the inner diameter of the needle 130 in which it is located. That is, the unit bodies 1342a may not be larger than the inner diameter of the respective corresponding needles 130. For example, the rotor structure 1342 may be disposed partially in the portion of the needle 130 having the largest inner diameter and the rotor structure 1342 may be disposed partially in the portion of the needle 130 having the target inner diameter. In this case, the unit body 1342a3 disposed at a portion having the largest inner diameter may be larger in size than the unit bodies 1342a1 and 1342a2, etc., disposed at portions having target inner diameters.

In some examples, the rotor structure 1342 may be placed into the needle 130 from a port remote from the needle tip 131 prior to assembly of the needle 130 to the barrel 110.

In some examples, the rotor structure 1342 may be disposed within the needle 130. For example, the rotor structure 1342 may be disposed partially within the needle tip 131, partially within the transition segment 133 or the needle 130 having the largest inner diameter portion (see fig. 10). In this case, the outer diameter of the rotor structure 1342 (e.g., 1342a 3) disposed within the transition segment 133 or the needle 130 having the largest inner diameter may be greater than the inner diameter of the needle tip 131, thereby enabling better disposition of the rotor structure 1342 within the needle 130.

In other examples, the rotor structure 1342 may be placed into the needle 130 from a port remote from the needle tip 131 before the needle 130 is assembled with the barrel 110, and the rotor structure 1342 may be adhered to the inner wall of the needle 130.

In the present disclosure, as described above, an injector 10 for viscous and incompressible fluids may include a barrel 110, a ram 120, and a needle 130. Syringe 110 may be used to contain fluids; the push rod 120 may be disposed in the cylinder 110 and movable along the cylinder 110, and the push rod 120 may have a lever body 121, a piston 122 disposed at one end of the lever body 121 and located in the cylinder 110, and a grip 123 disposed at the lever body 121. Ram 120 may move along the interior of barrel 110 from a first position 111a of barrel 110 distal needle 130 to a second position 111b proximal needle 130. A needle 130 may be mounted at one end of the barrel 110 and in communication with the barrel 110, and a helical cutting mechanism 134 may be disposed within the needle 130. The inner diameter of the cylinder 110 may be larger than that of the needle 130, and a transition section 133 having a gradually reduced inner diameter may be formed between the cylinder 110 and the needle 130. When the syringe 110 contains fluid and the ram 120 moves from the first position 111a to the second position 111b of the syringe 110, fluid may be forced out of the needle 130 through the helical shear mechanism 134. This can reduce the resistance of the syringe 10 when injecting fluid, and can facilitate fluid injection.

While the invention has been specifically described above in connection with the drawings and examples, it will be understood that the above description is not intended to limit the invention in any way. Those skilled in the art can make modifications and variations to the present invention as needed without departing from the true spirit and scope of the invention, and such modifications and variations are within the scope of the invention.

Claims (9)

1. An injector with a spiral shearing mechanism is characterized by comprising a needle cylinder for containing fluid, a push rod which is arranged in the needle cylinder and can move along the needle cylinder, a cover body for covering a nozzle of the needle cylinder, and a needle head which is arranged at one end of the needle cylinder and is communicated with the needle cylinder, wherein the push rod is provided with a rod body, a piston which is arranged at one end of the rod body and is positioned in the needle cylinder, and a holding part which is arranged on the rod body, the cover body is provided with a through hole, the periphery of the rod body is provided with a first thread, the inner wall of the through hole is provided with a second thread matched with the first thread, and the piston moves in the needle cylinder by rotating the push rod; the needle head is internally provided with a spiral shearing mechanism which is a screw extrusion structure or a rotor structure, the spiral shearing mechanism is matched with the inner wall of the needle head to form a channel for the fluid to circulate, the rotor structure is formed by connecting a plurality of unit bodies, the unit bodies are spiral, the screw extrusion structure is a protrusion or a groove which is formed on the inner wall of the needle head and is of a spiral structure,

the fluid is forced out of the needle by the helical shear mechanism, and as the fluid flows through the helical shear mechanism, the fluid is subjected to shear forces of the helical shear mechanism to reduce the resistance of the fluid inside the needle.

2. The syringe of claim 1,

the inner diameter of the syringe is larger than that of the needle, and a transition section with the inner diameter gradually reduced is formed between the syringe and the needle.

3. The syringe of claim 1,

the plurality of unit bodies are arranged and connected together to form the rotor structure, the connection positions of two adjacent unit bodies in the rotor structure are different, and the adjacent unit bodies are relatively rotated by 90 degrees.

4. The syringe of claim 1,

the outer diameter of the piston is not less than the inner diameter of the needle cylinder.

5. The syringe of claim 1,

the needle cylinder comprises a hollow cylinder wall, a connecting part connected with the needle head and a blocking mechanism which is arranged on the periphery of the hollow cylinder wall and prevents the needle cylinder from moving along with the push rod when the injector injects.

6. The syringe of claim 5,

the blocking mechanism is arranged to cooperate with the holding portion, and the blocking mechanism is an anti-skid strip or a finger-pinching portion.

7. The syringe of claim 5,

the connecting part is connected with the needle head in a screwing mode, so that the inner diameter of the needle head is matched with that of the connecting part.

8. The syringe of claim 5,

the outer diameter of the rod body is not larger than the inner diameter of the hollow cylinder wall.

9. The syringe of claim 2,

the inner contour of the transition section is tapered or rounded in cross section along the axial direction of the needle cylinder.

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