Syringes and multi-syringes with plunger anti-dropout parts

Abstract

The present application proposes a syringe and a multi-unit syringe containing a push rod anti-slipping piece, the push rod anti-slipping piece is used to connect to the syringe, the syringe includes a cylinder and a push rod, the end of the cylinder is provided with a cylinder flange, the push rod includes a rod and a push rod end connected to one end of the rod, the radial dimension of the push rod end is greater than the radial dimension of the rod; the push rod anti-slipping piece includes a bottom, a left side wall and a right side wall, the left side wall and the right side wall are respectively connected to the two sides of the bottom to define a receiving groove for accommodating the cylinder flange; the left side wall includes a left side wall arc section, the inner circumference of the left side wall arc section constitutes a major arc, and the right side wall is formed with a concave portion, the width of the concave portion is less than the radial dimension of the push rod end and greater than the radial dimension of the rod. By adopting the above technical solution, when the syringe is extracted, the right side wall of the push rod anti-slipping piece can prevent the push rod end from escaping from the cylinder, effectively preventing the push rod and the cylinder from separating during the use or transportation of the syringe.

Description

Technical Field

[0001] The present application belongs to the field of medical equipment, and in particular relates to a syringe and a multiple syringe containing a push rod anti-dropout component. Background Art

[0002] A syringe is a commonly used medical device with a wide range of uses. It can inject liquids and gases. At present, existing syringes are generally composed of a cylinder, a push rod and a piston. The piston can be slidably arranged in the cylinder, and the piston is fixedly connected to the push rod. The syringe can be used to inject or extract liquid. When the push rod is pulled out, the liquid or gas is sucked from the small hole at the front end of the cylinder, and when the push rod is pushed in, the liquid or gas in the cylinder is squeezed out.

[0003] When the existing syringe is drawing liquid, the piston and the push rod may be accidentally pulled out, which causes the injection liquid to leak out. As is known to all, the connection method between the push rod and the piston inside the existing syringe is very simple, that is, a connector is provided on the push rod, a connecting groove is provided on the piston, the connector is inserted into the connecting groove, and the piston is stretched open by the connector so that the piston and the inner wall of the cylinder are in an interference state, so that the piston can better seal the liquid in the cylinder, but the push rod and the piston using this connection method are very easy to fall off.

[0004] The existing anti-slipping member that prevents the piston from coming out of the syringe can keep the piston in the cylinder, but because the push rod is not tightly connected to the piston, it is possible that the push rod and the piston are separated, causing the push rod to have come out of the cylinder. The piston is generally made of rubber material and is prone to deformation. After the piston lacks the support of the connector of the push rod, the sealing effect between the piston and the inside of the cylinder is reduced. In addition, in plateau areas, the push rod and the piston may also be separated from the cylinder due to atmospheric pressure during transportation, causing liquid to flow out of the cylinder. Therefore, the anti-slipping structure that prevents the piston from coming out of the cylinder still has the problem of poor sealing effect.

[0005] In the prior art of patent CN215875794U, a rotating part is movably arranged on the wing plate, a fixed structure is arranged on the rotating part, a cross bar and an embedded rod are arranged on the fixed structure, a rod body 1 is arranged on the piston core rod, an embedded groove is opened on the rod body 1, and the embedded groove and the embedded rod are plugged and fixed together to avoid the waste of liquid medicine caused by pulling out the plug rod; this structural design is relatively complicated.

[0006] In the prior art of patent CN210992290U, there is an anti-slip component to prevent the push rod and the cylinder from slipping out. The anti-slip component includes two symmetrically arranged limit clamps, and the limit clamps include a sleeve part, a block part and a groove. The sleeve part is sleeved onto the flange of the cylinder, and two symmetrical side plates of the push rod are located between the two limit clamps, and the other two symmetrical side plates are located in the groove, so as to achieve the purpose of the anti-slip component to limit the push rod from slipping out. The anti-slip component has the following problems:

[0007] ①It needs to be installed on the cross-shaped side plate of the push rod, so it is only suitable for syringes with a cross-shaped push rod;

[0008] ② It adopts two semicircular splicing structures. This anti-dropping part is not tightly connected to the syringe, the fixing effect is not good, and it is easy to fall off during use;

[0009] ③ The distance between the anti-slip part and the syringe push rod is small. Once the push rod rotates, it is easy to rub the anti-slip part, resulting in poor movement of the push rod. Summary of the invention

[0010] The present application aims to propose a syringe containing a push rod anti-dropout part to prevent the push rod from falling out of the cylinder during use or transportation of the syringe; and the push rod anti-dropout part is easy to install and can be firmly fixed on the syringe, and is not easy to fall off during use.

[0011] The present application also proposes a multiple syringe.

[0012] The embodiment of the present application provides a syringe with a push rod anti-dropout member, wherein the push rod anti-dropout member is used to be connected to the syringe, wherein the syringe comprises a cylinder and a push rod, wherein the end of the cylinder is provided with a cylinder flange, and the push rod comprises a rod portion and a push rod end portion connected to one end of the rod portion, wherein the radial dimension of the push rod end portion is greater than the radial dimension of the rod portion;

[0013] The push rod anti-dropping member comprises a bottom, a left wall portion and a right wall portion, wherein the left wall portion and the right wall portion are respectively connected to two sides of the bottom to define a receiving groove, and the receiving groove is used to receive at least a portion of the cylindrical flange;

[0014] The left side wall portion includes a left side wall portion arc segment, the inner circumference of the left side wall portion arc segment forms a major arc, and the right side wall portion is formed with a concave portion, the width of the concave portion is smaller than the radial dimension of the push rod end portion and larger than the radial dimension of the rod portion;

[0015] When the push rod anti-dropping member is installed on the syringe, the left side wall portion and the right side wall portion are respectively located on both sides of the cylinder flange, and the arc section of the left side wall portion clamps the cylinder.

[0016] In at least one possible embodiment, the left side wall portion also includes two left side wall opening sections, and the two left side wall opening sections are respectively connected to the two end portions of the left side wall arc section, and the left side wall opening sections form an opening, and the radial dimension of the opening gradually decreases from the opening side to the side where the left side wall arc section is located.

[0017] In at least one possible embodiment, the right side wall portion includes a right side wall middle section and two right side wall opening sections, the two right side wall opening sections are respectively connected to two ends of the right side wall middle section, and the inner circumferential surface of the right side wall middle section forms a semicircular arc.

[0018] In at least one possible embodiment, the cylindrical flange is non-circular in shape, and the inner circumference of the bottom and a section of the outer circumference of the cylindrical flange cooperate with each other, so that the cylindrical flange and the push rod anti-slip component cannot rotate relative to each other.

[0019] In at least one possible embodiment, the bottom includes a bottom middle section and two bottom opening sections, and the bottom opening sections are connected to two ends of the bottom middle section;

[0020] The cylindrical flange includes a cylindrical flange arc section and two cylindrical flange straight sections. When the push rod anti-slip component is installed on the syringe, the radial inner surface of the bottom opening section cooperates with the cylindrical flange straight section, so that the cylindrical flange and the push rod anti-slip component cannot rotate relative to each other.

[0021] In at least one possible implementation, the push rod anti-dropping component is a single-piece structure made of elastic material.

[0022] In at least one possible implementation, a piston is disposed at the front end of the push rod end, and a radial dimension of the piston is greater than a radial dimension of the push rod end.

[0023] The embodiment of the present application also proposes a multi-unit syringe, comprising:

[0024] Mounting bracket; and

[0025] A syringe according to any one of the above technical solutions;

[0026] Wherein, the push rod anti-dropping member can be snap-connected to the fixing frame.

[0027] In at least one possible embodiment, the fixing frame is provided with a buckle, and the push rod anti-slip member of the syringe is provided with a snap-fitting portion, and the push rod anti-slip member of the syringe can be snap-fitted to the fixing frame through the cooperation of the buckle and the snap-fitting portion.

[0028] In at least one possible implementation, in the radial direction of the push rod anti-dropout member, the buckle and the snap-fitting portion are matched in size, so that the fixing frame and the push rod anti-dropout member of the syringe cannot rotate relative to each other.

[0029] By adopting the above technical solution, at least one of the following technical effects can be achieved:

[0030] ① When the syringe is being drawn out, the right wall of the push rod anti-dropout member can prevent the end of the push rod from falling out of the cylinder, effectively preventing the push rod and the cylinder from separating during the use or transportation of the syringe;

[0031] ②The push rod anti-dropping piece can be firmly fixed on the syringe and is not easy to fall off during use;

[0032] ③The push rod anti-dropping piece is suitable for push rods of various shapes. There is no friction with the anti-dropping piece during the push and pull movement of the push rod, and the push and pull operation of the push rod is smooth;

[0033] ④The installation and disassembly between the push rod anti-dropping part and the syringe is simple and convenient;

[0034] ⑤ The multi-unit syringes composed of syringes with push rod anti-dropout parts are matched with the push rod anti-dropout parts through the buckle on the fixed frame, so that the push rod anti-dropout parts of the syringes are clamped on the fixed frame, and the push rod anti-dropout parts and the fixed frame cannot rotate relative to each other, which can prevent the syringes from rotating relative to the fixed frame during use, and meet the requirements of the multi-unit syringes for the anti-dropout and anti-rotation functions of the syringes. And the structure is simple, suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figures 1 to 3 A schematic structural diagram of a push rod anti-dropout member of a syringe according to an embodiment of the present application is shown.

[0036] Figure 4 A schematic diagram of the structure of the syringe is shown.

[0037] Figure 5 A schematic structural diagram is shown of a syringe push rod anti-dropout member installed on a syringe according to an embodiment of the present application.

[0038] Figure 6 A schematic structural diagram of a push rod of a syringe is shown.

[0039] Figure 7 A cross-sectional view of a multiple syringe according to an embodiment of the present application is shown.

[0040] Figure 8 A schematic structural diagram of a fixing frame of a multiple syringe according to an embodiment of the present application is shown.

[0041] Description of Reference Numerals

[0042] 100 Push rod anti-dropping parts

[0043] 200 syringe 201 cylinder 202 push rod 2021 rod portion 2022 push rod end 203 cylinder flange 2031 cylinder flange arc section 2032 cylinder flange straight section 204 piston 205 pressure applying portion

[0044] 300 Fixing bracket 301 Buckle 302 Mounting hole

[0045] 1 Bottom 11 Bottom middle section 12 Bottom opening section

[0046] 2 Left side wall 21 Left side wall arc section 22 Left side wall opening section

[0047] 3 Right side wall 31 Right side wall middle section 32 Right side wall opening section

[0048] 4 Storage slots

[0049] 5 Snap-fit ​​section

[0050] A Axial direction C Circumferential direction R Radial direction X First direction Y Second direction DETAILED DESCRIPTION

[0051] In order to more clearly explain the above-mentioned purposes, features and advantages of the present application, the specific implementation methods of the present application are described in detail in this section in conjunction with the accompanying drawings. In addition to the various implementation methods described in this section, the present application can also be implemented in other different ways. Without violating the spirit of the present application, those skilled in the art can make corresponding improvements, deformations and substitutions, so the present application is not limited by the specific embodiments disclosed in this section. The scope of protection of the present application shall be subject to the claims.

[0052] If not separately stated, in the following description, axial direction A represents the axial direction A of the push rod anti-slip component 100 , circumferential direction C represents the circumferential direction C of the push rod anti-slip component 100 , and radial direction R represents the radial direction R of the push rod anti-slip component 100 .

[0053] "Front end" and "front side" refer to the end of the syringe on the axial direction A used to extract or discharge liquid. "Rear end" refers to the end of the syringe where the plunger is installed. "Left side" and "right side" refer to the end of the syringe where the plunger is installed. Figure 1 , Figure 3 The angles shown observe the left and right sides of the push rod anti-dropout member 100. "Inside" refers to the radial inside of the push rod anti-dropout member 100.

[0054] In the present application, directions or positional relationships indicated by words such as "left", "right", "front", "back", "inside", and "outside" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0055] When the push rod anti-slip component 100 is installed on the syringe 200, the axial direction A of the push rod anti-slip component 100 is consistent with the axial direction of the syringe 200, the circumferential direction C of the push rod anti-slip component 100 is consistent with the circumferential direction of the syringe 200, and the radial direction R of the push rod anti-slip component 100 is consistent with the radial direction of the syringe 200.

[0056] like Figure 5 As shown, the radial direction R includes a first direction X and a second direction Y, and the first direction X and the second direction Y may be perpendicular to each other.

[0057] like Figures 1 to 8 As shown, an embodiment of the present application provides a syringe containing a push rod anti-slipping member, which includes a push rod anti-slipping member 100 and a syringe 200 , and the push rod anti-slipping member 100 can be connected to the syringe 200 .

[0058] like Figure 4 As shown, the syringe 200 includes a barrel 201 and a push rod 202 . The barrel 201 is cylindrical, a barrel flange 203 may be provided at the rear end of the barrel 201 , and the push rod 202 may be partially inserted into the barrel 201 .

[0059] like Figure 6 As shown, the push rod 202 includes a rod portion 2021 and a push rod end portion 2022, and the push rod end portion 2022 is connected to the front end of the rod portion 2021. The push rod end portion 2022 is connected to the piston 204, for example, the piston 204 can be sleeved on the push rod end portion 2022 or directly connected to the front end of the push rod end portion 2022. The radial dimension of the piston 204 can be slightly larger than the radial dimension of the push rod end portion 2022 (which can be understood as the diameter or the diameter of the circumscribed circle). The piston is generally made of rubber material and is prone to deformation. The push rod end portion 2022 can support the piston 204, so that the piston 204 will not be excessively deformed. The radial dimension of the push rod end portion 2022 is larger than the radial dimension of the rod portion 2021.

[0060] The piston 204 inserted into the cylinder 201 can be close to the inner wall of the cylinder 201, and the push rod 202 can move in the cylinder 201 to achieve the extraction and discharge of liquid. The other end of the push rod 202 can be provided with a pressure portion 205, and the radial dimension of the pressure portion 205 can be greater than the radial dimension of the rod portion 2021 of the push rod 202, and the pressure portion 205 can be plate-shaped. The push rod anti-detachment member 100 installed on the syringe 200 can prevent the push rod 202 from detaching from the cylinder 201.

[0061] The cylindrical flange 203 may include a cylindrical flange arc segment 2031 and a cylindrical flange straight segment 2032. The cylindrical flange straight segment 2032 may be formed by cutting off a portion of a circular flat plate, and the uncut portion may be the cylindrical flange arc segment 2031. In the circumferential direction C of the cylindrical flange 203, there may be two cylindrical flange arc segments 2031 and two cylindrical flange straight segments 2032. The cylindrical flange straight segment 2032 may prevent the syringe 200 from rolling when placed on a flat surface, and may prevent the syringe 200 from falling off the table.

[0062] In other possible implementations, the cylindrical flange 203 may also be other non-circular shapes, such as elliptical, oval, rectangular or other irregular shapes. These non-circular shapes can prevent the syringe 200 from rolling easily.

[0063] like Figures 1 to 3 As shown, the push rod anti-slip member 100 is provided with a receiving groove 4, and when the push rod anti-slip member 100 is installed on the syringe 200, the cylindrical flange 203 of the syringe 200 is partially located in the receiving groove 4. The push rod anti-slip member 100 includes a bottom 1, a left side wall portion 2 and a right side wall portion 3, and the left side wall portion 2 and the right side wall portion 3 are respectively connected to both sides of the bottom 1 to define the receiving groove 4. The inner circumferential surface of the bottom 1 of the receiving groove 4 and a section of the outer circumferential surface of the cylindrical flange 203 cooperate with each other, so that the cylindrical flange 203 and the push rod anti-slip member 100 cannot rotate relative to each other. The opening of the receiving groove 4 can face one side in the first direction X. The push rod anti-slip member 100 can be a single-piece structure made of elastic material (such as plastic).

[0064] (bottom)

[0065] like Figures 1 to 5 As shown, the bottom 1 includes a bottom middle section 11 and a bottom opening section 12. The bottom 1 can extend along the axial direction A and the circumferential direction C of the push rod anti-slipping member 100. When the push rod anti-slipping member 100 is installed on the state of the syringe 200, the bottom middle section 11 can be matched with a cylindrical flange arc section 2031, and the radial inner surface of the bottom opening section 12 can be matched with the cylindrical flange straight section 2032. The gap between the radial inner surface of the bottom opening section 12 and the cylindrical flange straight section 2032 can be less than, for example, 1 mm, so that the cylindrical flange 203 and the push rod anti-slipping member 100 cannot rotate relative to each other (but a very small rotation is allowed, which can be ignored, for example, less than 5 degrees of rotation). The front end of the syringe 200 can be provided with a Luer thread. During the use of the syringe 200, the syringe 200 is prevented from rotating relative to the push rod anti-slipping member 100, and the Luer thread connection structure can be kept tightly matched.

[0066] The two end portions of the bottom 1 can be extended inwardly close to each other through the bottom opening section 12, so that the anti-dropout member 100 can firmly buckle the cylindrical flange 203 of the syringe 200, and the anti-dropout member 100 and the syringe 200 are not easy to be loosened after installation. However, it is not limited here that the bottom opening sections 12 of the two end portions of the bottom 1 must be extended inwardly close to each other.

[0067] like Figure 5 As shown, the bottom 1 can be hollow, for example, the middle section 11 of the bottom can be hollow, which can save materials and costs, and also facilitate observation of the cylindrical flange 203 to determine whether the push rod anti-slip component 100 is snapped into place.

[0068] The inner and outer peripheral surfaces of the bottom portion 1 have substantially the same shape and are easy to process.

[0069] (Left side wall)

[0070] like Figure 1 and Figure 5 As shown, the left side wall 2 is plate-shaped as a whole, and the left side wall 2 can extend along the circumferential direction C and radial direction R of the push rod anti-slip member 100. The left side wall 2 includes a left side wall arc section 21 and a left side wall opening section 22, and the left side wall opening section 22 can be directly connected to the two ends of the left side wall arc section 21, that is, there is no transition section between the left side wall opening section 22 and the left side wall arc section 21. The inner circumferential surface of the left side wall arc section 21 can be arc-shaped, and the radial inner side surface of the left side wall opening section 22 can be straight.

[0071] The radial inner side surface of the left side wall opening section 22 may extend along a straight line, but it is not limited here that each surface of the left side wall opening section 22 is straight or planar.

[0072] The inner circumference of the arcuate section 21 of the left side wall can form a major arc, that is, the central angle of the arcuate inner circumference of the arcuate section 21 of the left side wall is greater than 180 degrees. When the push rod anti-slipping member 100 is installed on the syringe 200, the left side wall 2 is located at the front side of the cylinder flange 203, and the inner circumference of the arcuate section 21 of the left side wall can contact the outer circumferential wall of the cylinder 201, and the cylinder 201 can be clamped, so that the push rod anti-slipping member 100 can be firmly connected to the syringe 200, and the push rod anti-slipping member 100 and the syringe 200 are not easy to loosen after installation.

[0073] The left side wall opening section 22 can form an opening, and the radial dimension of the opening gradually decreases from the opening side to the side where the left side wall arc section 21 is located. When the push rod anti-dropping member 100 is installed on the syringe 200 along the first direction X, the cylinder 201 passes through the gradually narrowing opening to gradually deform and expand the opening. After the cylinder 201 passes through the narrowest part of the opening, the opening can restore the deformation, and the cylinder 201 is stuck by the inner circumference of the left side wall arc section 21.

[0074] Furthermore, the end of the left side wall opening section 22 may be rounded or chamfered to avoid injury to the human body during operation.

[0075] (Right side wall)

[0076] like Figures 1 to 6 As shown, the right side wall portion 3 is a U-shaped plate as a whole, and the right side wall portion 3 can extend along the circumferential direction C and radial direction R of the push rod anti-slip member 100, and the right side wall portion 3 is parallel to the left side wall portion 2. The right side wall portion 3 includes a right side wall portion middle section 31 and a right side wall portion opening section 32, and the right side wall portion opening section 32 is connected to the two ends of the right side wall portion middle section 31. The inner circumferential surface of the right side wall portion middle section 31 can form a semicircular arc, and the radial inner side surfaces of the two right side wall portion opening sections 32 can be parallel to each other.

[0077] The radial inner side surface of the right side wall opening section 32 may extend along a straight line, but it is not limited here that every surface of the right side wall opening section 32 is straight or planar.

[0078] The width B of the U-shaped recess of the right side wall portion 3 is less than the radial dimension of the push rod end 2022 and greater than the radial dimension of the rod 2021, so that the push rod end 2022 and the piston 204 cannot pass through the recess, and the rod 2021 can pass through the recess smoothly, and there is no friction between the recess, thereby not affecting the pulling operation of the push rod. The push rod anti-slipping piece 100 can be applicable to push rods of various shapes. Under the state that the push rod anti-slipping piece 100 is installed to the syringe 200, when the push rod 202 is extracted from the cylinder 201, the right side wall portion 3 can block the push rod end 2022 from being separated from the cylinder 201, so that the push rod 202 and the piston 204 will not be separated from the cylinder 201 due to excessive force in the process of pulling the push rod 202. In addition, in plateau areas, the push rod 202 and the piston 204 may be separated from the cylinder 201 due to atmospheric pressure during transportation. The push rod anti-separation member 100 can prevent the push rod end 2022 and the piston 204 from being separated from the cylinder 201.

[0079] Reference Figure 1 The anti-slip component 100 is in an open loop shape as a whole, and the right side wall portion 3 can protrude toward the inside of the anti-slip component 100 more than the left side wall portion 2 .

[0080] The push rod anti-slipping member 100 can be installed on the cylindrical flange 203 along the first direction X, and the radial inner surface of the bottom opening section 12 and the arc-shaped inner circumference of the left side wall arc section 21 enable the push rod anti-slipping member 100 to position the cylindrical flange 203 and the cylinder 201 in the first direction X. The two bottom opening sections 12 can clamp the cylindrical flange 203 in the second direction Y and position the cylindrical flange 203 in the second direction Y. The left side wall 2 and the right side wall 3 can clamp the cylindrical flange 203 in the axial direction A and position the cylindrical flange 203 in the axial direction A. When the push rod anti-slipping member 100 is disassembled, it only needs to be pulled out along the first direction X, and the installation and disassembly between the anti-slipping member 100 and the syringe 200 are simple and convenient.

[0081] The push rod anti-slipping member 100 is further provided with a snap-fitting portion 5 , and the snap-fitting portion 5 is used for snap-fitting the push rod anti-slipping member 100 with a fixing frame 300 described later.

[0082] The snap-fitting part 5 may include recessed parts formed on the outer circumference of both ends of the push rod anti-slipping member 100. Two snap-fitting parts 5 may be provided, and the two snap-fitting parts 5 may be respectively located at two outer circumferential straight sections of the push rod anti-slipping member 100, and the snap-fitting part 5 may penetrate the push rod anti-slipping member 100 along the axial direction A of the push rod anti-slipping member 100. The outer circumferential straight section may have no corresponding relationship with the bottom opening section 12, the left side wall opening section 22, and the right side wall opening section 32.

[0083] In one possible prior art, the anti-dropout member can prevent the piston from falling out of the cylinder. Although this can keep the piston in the cylinder, since the push rod is not tightly connected to the piston, the push rod may separate from the piston, causing the push rod to fall out of the cylinder, which will reduce the sealing of the cylinder.

[0084] In addition, if the connection between the push rod and the piston lacks the support of the push rod end in the present application, since the piston is generally made of rubber material and is prone to deformation, excessive force when pulling the push rod may cause the piston to deform, causing the push rod and the piston to fall out of the cylinder together, thereby causing liquid to flow out of the cylinder.

[0085] The push rod anti-slip member 100 of the present application can prevent the push rod end 2022 from escaping from the cylinder 201, so that the push rod end 2022 and the piston 204 can be kept in the cylinder 201, so that the cylinder has better sealing performance and is less likely to leak.

[0086] like Figure 7 and Figure 8As shown, the present application also proposes a multiple syringe, which includes a plurality of syringes 200 containing push rod anti-dropout parts 100 and a fixing frame 300, and the push rod anti-dropout parts 100 can be snapped into the fixing frame 300. The fixing frame 300 is provided with a plurality of mounting holes 302 for accommodating the syringes 200, and a buckle 301 for fixing the push rod anti-dropout parts 100 is provided at the opening of the mounting hole 302, and the buckle 301 can have an edge that extends and has a bent end.

[0087] When the syringe 200 is inserted into the mounting hole 302 and connected to the fixing frame 300, the mounting hole 302 positions the syringe in the radial direction R. The push rod anti-slipping member 100 can be pressed into the buckle 301 through the snap-fitting portion 5 along the axial direction A, and the edge of the buckle 301 clamps the side of the snap-fitting portion 5, thereby fixing the fixing frame 300 and the push rod anti-slipping member 100 in the axial direction A, thereby fixing multiple syringes 200 on the fixing frame 300. In the radial direction R of the push rod anti-slipping member 100, the width of the recess of the snap-fitting portion 5 can match the size of the buckle 301, so that the fixing frame 300 and the push rod anti-slipping member 100 cannot rotate relative to each other. During the use of the syringe 200, the syringe 200 is prevented from rotating relative to the fixing frame 300, and the Luer thread connection structure can be kept tightly fitted.

[0088] This embodiment illustrates a double syringe, which includes two syringes 200. The multi-syringe of the present application may also be a triple syringe including three syringes.

[0089] Although the present application is described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in this specification. The present application can be modified and implemented as a modified embodiment without departing from the subject matter and scope of the present application as determined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning for the present application.

Claims

1. A syringe having a push rod anti-dropout member, characterized in that: The push rod anti-dropping member (100) is used to be connected to a syringe (200), wherein the syringe (200) comprises a cylinder (201) and a push rod (202), wherein the end of the cylinder (201) is provided with a cylinder flange (203), and the push rod (202) comprises a rod portion (2021) and a push rod end portion (2022) connected to one end of the rod portion (2021), wherein the radial dimension of the push rod end portion (2022) is greater than the radial dimension of the rod portion (2021); The push rod anti-slip component (100) comprises a bottom (1), a left side wall portion (2) and a right side wall portion (3), wherein the left side wall portion (2) and the right side wall portion (3) are respectively connected to two sides of the bottom (1) to define a receiving groove (4), and the receiving groove (4) is used to receive at least a portion of the cylindrical flange (203); The left side wall portion (2) comprises a left side wall arc segment (21), the inner circumference of the left side wall arc segment (21) forms a major arc, and the right side wall portion (3) is formed with a recessed portion, the width of which is smaller than the radial dimension of the push rod end portion (2022) and larger than the radial dimension of the rod portion (2021); When the push rod anti-dropping member (100) is installed on the syringe (200), the left side wall portion (2) and the right side wall portion (3) are respectively located on both sides of the cylinder flange (203), and the arc section (21) of the left side wall portion clamps the cylinder (201).

2. The syringe according to claim 1, characterized in that The left side wall portion (2) further comprises two left side wall portion opening sections (22), the two left side wall portion opening sections (22) being respectively connected to the two end portions of the left side wall portion arc-shaped section (21), the left side wall portion opening sections (22) forming an opening, the radial dimension of the opening gradually decreasing from the opening side to the side where the left side wall portion arc-shaped section (21) is located.

3. The syringe according to claim 1, characterized in that The right side wall portion (3) comprises a right side wall portion middle section (31) and two right side wall opening sections (32), wherein the two right side wall opening sections (32) are respectively connected to two ends of the right side wall portion middle section (31), and the inner peripheral surface of the right side wall portion middle section (31) forms a semicircular arc.

4. The syringe according to claim 1, characterized in that The cylindrical flange (203) is non-circular in shape, and the inner circumference of the bottom (1) and a section of the outer circumference of the cylindrical flange (203) cooperate with each other, so that the cylindrical flange (203) and the push rod anti-slip component (100) cannot rotate relative to each other.

5. The syringe according to claim 1, characterized in that The bottom (1) comprises a bottom middle section (11) and two bottom opening sections (12), wherein the bottom opening sections (12) are connected to two ends of the bottom middle section (11); The cylindrical flange (203) includes a cylindrical flange arc section (2031) and two cylindrical flange straight sections (2032). When the push rod anti-slip component (100) is installed on the syringe (200), the radial inner surface of the bottom opening section (12) and the cylindrical flange straight section (2032) cooperate, so that the cylindrical flange (203) and the push rod anti-slip component (100) cannot rotate relative to each other.

6. The syringe according to claim 1, characterized in that The push rod anti-dropping piece (100) is a single-piece structure made of elastic material.

7. The syringe according to claim 1, characterized in that A piston (204) is provided at the front end of the push rod end (2022), and the radial dimension of the piston (204) is greater than the radial dimension of the push rod end (2022).

8. A multiple syringe, characterized in that: include: A fixing frame (300); and The syringe according to any one of claims 1 to 7; Wherein, the push rod anti-dropping member (100) can be snap-connected to the fixing frame (300).

9. The multiple syringe according to claim 8, characterized in that: The fixing frame (300) is provided with a buckle (301), and the push rod anti-slipping member (100) of the syringe is provided with a snap-fitting portion (5), and the push rod anti-slipping member (100) of the syringe can be snap-fitted to the fixing frame (300) through the cooperation between the buckle (301) and the snap-fitting portion (5).

10. The multiple syringe according to claim 9, characterized in that: In the radial direction (R) of the push rod anti-slipping piece (100), the buckle (301) and the snap-fitting portion (5) are matched in size, so that the fixing frame (300) and the push rod anti-slipping piece (100) of the syringe cannot rotate relative to each other.

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