CN118697975A - Double chamber syringe - Google Patents

Abstract

The present application relates to a double-chamber syringe, comprising an injection device and an adjustment device, the injection device comprising a first injection tube, a second injection tube and a mixing output tube; the adjustment device comprises an adjustment piece and a matching piece; the adjustment piece is slidably and rotatably connected to a first withdrawal and pressure rod of the first injection tube, and the matching piece is rotatably connected to a second withdrawal and pressure rod of the second injection tube; when force is applied to one of the first withdrawal and pressure rod and the second withdrawal and pressure rod, the other can be linked under the cooperation of the adjustment piece and the matching piece; one or more different proportion adjustment parts are provided on the adjustment piece, and corresponding proportion matching parts are provided on the matching piece, and each proportion adjustment part can match with the corresponding proportion matching part to form a matching gear; the adjustment piece can switch the matching gear by sliding, so that one of the proportion adjustment parts on the adjustment piece matches with the corresponding proportion matching part on the matching piece, so as to adjust the liquid output ratio of the first injection tube and the second injection tube.

Description

Double chamber syringe

Technical Field

The present invention relates to the technical field of medical devices, in particular to a double-chamber syringe.

Background Art

In clinical applications, it is often necessary to mix two liquid components before injecting them into the patient. For example, in a mixture that hardens within a short time after mixing, it is necessary to mix it shortly before use. Therefore, a double-chamber syringe capable of dispensing two fluid components is required. The two components must be stored separately in the two chambers of the double-chamber syringe or drawn into the syringe shortly before use and need to be fully mixed when used.

However, in clinical applications, the syringes used by medical workers are usually single-tube type. When two different drug solutions are needed, the syringe and needle need to be replaced to absorb the medicine. This method is cumbersome and increases the risk of liquid contamination, and the two drug solutions cannot be mixed at the same time.

Existing double-chamber syringes can achieve simultaneous mixing of two liquid medicines. There are mainly two ways. One is to customize a syringe containing two cavities, and the other is to assemble two single-chamber syringes into a multi-component mixed injection system through connectors. However, the former requires customized double-chamber syringes, which is more expensive. In addition, the above two paths usually have a fixed volume ratio of the two components, that is, the volume of the two-component liquids when mixed must remain consistent, or syringes of different volumes are set, but the specifications of the syringes are fixed, and it is often impossible to find syringes of corresponding volumes. The existing double-chamber syringe products on the market cannot meet the flexible and changeable clinical usage scenarios.

Summary of the invention

Based on this, it is necessary to provide a double-chamber syringe with an adjustable mixing ratio.

A double-chamber syringe, comprising:

An injection device, comprising a first injection tube, a second injection tube and a mixing output tube, wherein the first injection tube and the second injection tube are respectively connected to the mixing output tube; and

The adjusting device comprises an adjusting member and a matching member; the adjusting member is slidably and rotatably connected to the first pumping and pressing rod of the first injection tube, and the matching member is rotatably connected to the second pumping and pressing rod of the second injection tube; when a force is applied to one of the first pumping and pressing rod and the second pumping and pressing rod, the other one can be linked under the cooperation of the adjusting member and the matching member;

Wherein, the adjusting member is provided with one or more different proportional adjusting parts, and the matching member is provided with corresponding proportional matching parts, and each of the proportional adjusting parts can be matched with the corresponding proportional matching part to form a matching gear position.

With such an arrangement, the liquid output of the first injection tube and the second injection tube can be adjusted by the cooperation of the ratio adjustment part on the adjusting part and the corresponding ratio matching part on the matching part; in other words, in different clinical use scenarios, when the volume ratios of fluids of different components are different, the double-chamber syringe provided in the present application can achieve adjustable volumes of fluids of different components without changing the specifications and sizes of the injection tubes, and can directly switch the matching gear position by sliding the adjusting part as required, so that the required ratio adjustment part cooperates with its corresponding ratio matching part, thereby adjusting the liquid output ratio of the first injection tube and the second injection tube to meet the mixing requirements of different volumes.

In one embodiment of the present invention, the adjusting member can slide and switch the matching gear position so that one of the ratio adjusting parts on the adjusting member matches with the corresponding ratio matching part on the matching member to adjust the liquid discharge ratio of the first injection tube and the second injection tube; the ratio adjusting part includes an adjusting gear, and the ratio matching part includes a matching gear that can mesh with the adjusting gear; the adjusting member includes an adjusting rod, and the matching member includes a matching rod;

Among them, all the adjusting gears are sleeved on the adjusting rod at intervals, and all the matching gears are sleeved on the matching rod at intervals; the total circumferential length of each group of the adjusting gears and the matching gears is equal; the circumferential lengths of the adjusting gears in different groups are different.

With such a configuration, by controlling the proportional relationship between the circumferential length of the adjusting gear and the circumferential length of the mating gear, the movement strokes of the first pumping and pressure rod and the second pumping and pressure rod at the same time can be controlled accordingly, thereby controlling the liquid output of the first injection tube and the second injection tube, so that liquids of different components in the first injection tube and the second injection tube can be output into the mixed output tube according to a preset ratio.

In one embodiment of the present invention, the adjusting member is slidably and rotatably sleeved on the first pumping and pressure rod along the axial direction of the first pumping and pressure rod; the matching member is rotatably sleeved on the second pumping and pressure rod along the axial direction of the second pumping and pressure rod.

With such arrangement, the adjusting member can move along the axial direction of the first pressure rod, thereby switching different proportional adjusting parts to cooperate with corresponding proportional matching parts.

In one embodiment of the present invention, one of the outer circumferential wall of the first pressure-drawing rod and the inner circumferential wall of the adjusting member is provided with a thread, and the other is provided with a spiral groove, and when the first pressure-drawing rod moves, the adjusting member can be driven to rotate by the cooperation of the thread and the spiral groove, and when the adjusting member rotates, the first pressure-drawing rod can be driven to move by the cooperation of the spiral groove and the thread;

One of the outer circumferential wall of the second pressure-drawing rod and the inner circumferential wall of the matching piece is convexly provided with a thread, and the other is provided with a spiral groove. The movement of the second pressure-drawing rod can drive the matching piece to rotate through the cooperation between the thread and the spiral groove. When the matching piece rotates, the cooperation between the spiral groove and the thread can drive the second pressure-drawing rod to move.

With such arrangement, when force is applied to the first pressure rod and the first pressure rod moves downward, the thread and the spiral groove cooperate with each other to enable the adjusting rod of the adjusting member to rotate on the first pressure rod, and then the adjusting gear and the matching gear can drive the matching rod to rotate, and the spiral groove on the inner circumferential wall of the matching rod cooperates with the thread on the outer circumferential wall of the second pressure rod, so that the second pressure rod can move downward at the same time; conversely, when force is applied to the second pressure rod, the second pressure rod can also drive the first pressure rod to move downward at the same time; the matching method of the thread and the spiral groove is simple, easy to manufacture, low cost, and does not take up much space during assembly and use.

In one embodiment of the present invention, the adjusting device further comprises a control member, and the control member comprises an operating rod and a connecting claw connected to each other.

With such arrangement, the connecting claw can be used to connect to the second pumping and pressing rod, and the operating rod is convenient for a person to control the connecting claw to drive the second pumping and pressing rod to move.

In one embodiment of the present invention, the double-chamber syringe also includes a mounting shell, the adjusting member and the matching member are mounted on the mounting shell, the first pressure-extraction rod and the second pressure-extraction rod axially penetrate the mounting shell and protrude from the top wall of the mounting shell; a first adjustment hole is formed on the side wall of the mounting shell, and one end of the operating rod relatively away from the connecting claw passes through the first adjustment hole and can move along the first pressure-extraction rod in the first adjustment hole.

With this arrangement, the installation positions of the adjusting member and the matching member are relatively stable and not easily disturbed by external factors, and the matching process is safer and more effective, which can effectively ensure the regulating effect of the adjusting member and the matching member on the liquid output ratio of the first injection tube and the second injection tube.

In one embodiment of the present invention, the adjusting member is slidably and rotatably connected to the first pumping rod in a direction perpendicular to the axis of the first pumping rod; the matching member is rotatably connected to the second pumping rod in a direction perpendicular to the axis of the second pumping rod.

With such arrangement, the adjusting member can move along the radial direction of the first pressure rod, thereby switching different proportional adjusting parts to cooperate with corresponding proportional matching parts.

In one embodiment of the present invention, the first pressure rod is provided with a plurality of first strip-shaped tooth grooves along the axial direction, and the adjusting gear on the adjusting member is rotatably engaged with the first strip-shaped tooth grooves and is able to slide in the first strip-shaped tooth grooves;

The second pressure-drawing rod is provided with a plurality of second strip-shaped tooth grooves along the axial direction, and at least one of the matching gears on the matching piece can be rotatably engaged with the first strip-shaped tooth grooves.

With such arrangement, when force is applied to the first pressure rod and the first pressure rod moves downward, the multiple first strip-shaped tooth grooves can mesh with the adjusting gear in sequence, thereby driving the adjusting gear and the matching gear to rotate in sequence, and then the matching gear can mesh with the multiple second strip-shaped tooth grooves on the second pressure rod in sequence, driving the second pressure rod to move downward at the same time; conversely, when force is applied to the second pressure rod, the second pressure rod can also drive the first pressure rod to move downward at the same time; the cooperation between the gear and the strip-shaped tooth groove makes the linkage between the first pressure rod and the adjusting member, and the linkage between the second pressure rod and the matching member simple and convenient, and the manufacturing is relatively simpler and the cost is lower, and it does not take up much space during assembly and use.

In one embodiment of the present invention, the double-chamber syringe also includes a mounting shell, the adjusting member and the matching member are mounted on the mounting shell, the first pressure-extraction rod and the second pressure-extraction rod axially penetrate the mounting shell and protrude from the top wall of the mounting shell; a second adjusting hole is formed on the side wall of the mounting shell, one end of the adjusting member passes through the second adjusting hole and can move in the second adjusting hole and the mounting shell along the axial direction of the adjusting member.

With this arrangement, the installation positions of the adjusting member and the matching member are relatively stable and not easily disturbed by external factors, and the matching process is safer and more effective, which can effectively ensure the regulating effect of the adjusting member and the matching member on the liquid output ratio of the first injection tube and the second injection tube.

In one embodiment of the present invention, the adjusting device further comprises a reset gear, and in the reset gear, the adjusting member can slide to separate all the proportion adjusting parts and all the proportion matching parts from each other.

With such an arrangement, in the preparation stage before mixing liquids of different components, the first injection tube and the second injection tube can suck and inject liquid without affecting each other; and when the double-chamber syringe is not in use, the matching gear position can also be switched to the reset gear position, so that the first pumping rod and the second pumping rod can both be pushed into the tube for storing liquid in the syringe, thereby reducing the storage space required for the entire double-chamber syringe during storage.

In one embodiment of the present invention, the first pumping and pressing rod comprises a first rod segment and a second rod segment connected to each other; wherein the first rod segment is used for pumping and pressing liquid, and the second rod segment is used for connecting the adjusting member.

With such arrangement, the first rod segment and the second rod segment have clear division of labor, are not likely to interfere with each other, and are easy to manufacture and obtain.

In one embodiment of the present invention, the second pumping and pressing rod comprises a third rod segment and a fourth rod segment connected to each other, the third rod segment is used for pumping and pressing liquid, and the fourth rod segment is used for connecting to the matching piece.

With such arrangement, the third rod segment and the fourth rod segment have clear division of labor, are not easily interfered with each other, and are easy to manufacture and obtain.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic structural diagram of a dual-chamber syringe in a first embodiment provided by the present application;

FIG2 is a schematic diagram of a partial structure of the double-chamber syringe in FIG1 ;

FIG3 is an enlarged schematic diagram of the structure at X in FIG2 ;

FIG4 is a schematic diagram of a partial structure of the double-chamber syringe in FIG1 ;

Fig. 5 is a schematic cross-sectional view of the double-chamber syringe in Fig. 4 with A-A as the cutting line;

FIG6 is a schematic diagram of a partial structure of the installation shell in FIG1 ;

FIG7 is a partial structural schematic diagram of the regulating device in FIG1 ;

FIG8 is a partial structural schematic diagram of the adjusting member in FIG7;

FIG9 is a schematic structural diagram of a dual-chamber syringe in a second embodiment provided by the present application;

FIG10 is a schematic structural diagram of the dual-chamber syringe in FIG9 from another viewing angle;

FIG11 is a partial structural schematic diagram of the double-chamber syringe in FIG9 ;

FIG12 is an enlarged schematic diagram of the structure at Y in FIG11;

FIG13 is a schematic structural diagram of the dual-chamber syringe in FIG11 from another viewing angle;

FIG. 14 is a schematic diagram of a partial structure of the mounting shell in FIG. 9 .

Figure numerals: 100, double-chamber syringe; 10, injection device; 101, liquid storage tube; 102, thread; 103, spiral groove; 104, first strip-shaped tooth groove; 105, second strip-shaped tooth groove; 11, first injection tube; 111, first pumping rod; 1111, first rod segment; 1112, second rod segment; 12, second injection tube; 121, second pumping rod; 1211, third rod segment; 1212, fourth rod segment; 13, mixing output tube; 131, liquid inlet; 132, liquid outlet; 20, adjustment device; 21, adjustment member; 211, adjustment rod; 2111, inner rod body; 21111, Snap-fit block; 2112, outer rod body; 21121, snap-fit groove; 22, matching piece; 221, matching rod; 23, proportional adjustment part; 231, adjustment gear; 24, proportional matching part; 241, matching gear; 25, control part; 251, operating rod; 252, connecting claw; 2521, first snap-fit part; 2522, second snap-fit part; 30, mounting shell; 31, first shell; 32, second shell; 33, hooking part; 34, proportional identification part; 301, first adjustment hole; 3011, sliding channel; 3012, snap-fit channel; 302, second adjustment hole; 40, needle; 50, protective sleeve.

DETAILED DESCRIPTION

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

In clinical applications, a dual-chamber syringe that can dispense two fluid components is often required. The two components must be stored separately and need to be fully mixed and reacted when used.

However, in clinical applications, the syringes used by medical workers are usually single-tube syringes. When patients need two different liquid medicines, they need to replace the syringe and needle to absorb the medicine, which is very inconvenient to use, and the two liquid medicines cannot be mixed at the same time.

Existing double-chamber syringes can achieve the mixing of two liquid medicines at the same time, but the volumes of the two components when mixed need to remain consistent, or syringes of different sizes must be set to achieve adjustable volume. In different clinical use scenarios, sometimes the volume ratios of the two components of the fluid are required to be different, and existing products cannot meet the above requirements; the specifications of the syringes are fixed, and it is often impossible to find the corresponding syringes.

Based on this, referring to FIGS. 1 to 14 , it is necessary to provide a dual-chamber syringe 100 with an adjustable component mixing ratio. The dual-chamber syringe 100 is generally used in the medical field, for example, mixing medical injections. It is understood that the dual-chamber syringe 100 can also be used in other fields, including but not limited to mixing experimental liquids in chemical experiments and biological experiments.

Please refer to FIG. 1 to FIG. 14 again. The present application provides a dual-chamber syringe 100, including an injection device 10 and an adjustment device 20. The injection device 10 generally includes two injection tubes.

The injection device 10 includes a first injection tube 11, a second injection tube 12 and a mixing output tube 13, wherein the first injection tube 11 and the second injection tube 12 are respectively connected to the mixing output tube 13; and

The adjusting device 20 includes an adjusting member 21 and a matching member 22; the adjusting member 21 is slidably and rotatably connected to the first pumping rod 111 of the first injection tube 11, and the matching member 22 is rotatably connected to the second pumping rod 121 of the second injection tube 12; when a force is applied to one of the first pumping rod 111 and the second pumping rod 121, the other one can be linked under the cooperation of the adjusting member 21 and the matching member 22;

The adjusting member 21 is provided with one or more different proportional adjusting parts 23 , and the matching member 22 is provided with corresponding proportional matching parts 24 . Each proportional adjusting part 23 can match with the corresponding proportional matching part 24 to form a matching gear position.

With such arrangement, the liquid output of the first injection tube 11 and the second injection tube 12 can be adjusted by the matching of the ratio adjustment part 23 on the adjusting member 21 and the corresponding ratio matching part 24 on the matching member 22. It can be understood that when multiple ratio adjustment parts 23 are provided, in different clinical use scenarios, when the volume ratios of fluids of different components are different, the double-chamber syringe 100 provided in the present application can achieve the adjustable volume of fluids of different components without changing the specifications and sizes of the injection tubes, and can directly switch the matching gear by sliding the adjusting member 21 according to the needs, so that the required ratio adjustment part 23 matches the corresponding ratio matching part 24, and then adjust the liquid output ratio of the first injection tube 11 and the second injection tube 12 to meet the mixing requirements of different volumes.

It should be noted that, in this embodiment, the first injection tube 11 and the second injection tube 12 are detachably connected to the mixing output tube 13. Such a configuration can facilitate the first injection tube 11 and the second injection tube 12 to absorb different components respectively after being disassembled, ensuring that the components in the first injection tube 11 and the second injection tube 12 are clean and single. In other words, such a configuration can avoid the mixing of two different components of liquid during the process of sucking liquid into the first injection tube 11 and the second injection tube 12, thereby avoiding errors in the mixed volume ratio of the two components when the liquid is mixed.

Please refer to FIG. 2 and FIG. 11 again. In some embodiments of the present invention, the adjusting member 21 can slide and switch the matching gear so that one of the ratio adjustment parts 23 on the adjusting member 21 matches with the corresponding ratio matching part 24 on the matching member 22 to adjust the liquid discharge ratio of the first injection tube 11 and the second injection tube 12; the ratio adjustment part 23 includes an adjusting gear 231, and the ratio matching part 24 includes a matching gear 241 that can mesh with the adjusting gear 231; the adjusting member 21 includes an adjusting rod 211, and the matching member 22 includes a matching rod 221;

Among them, all the adjusting gears 231 are sleeved on the adjusting rod 211 at intervals, and all the matching gears 241 are sleeved on the matching rod 221 at intervals; the total circumferential length of each group of adjusting gears 231 and matching gears 241 is equal; the circumferential lengths of different groups of adjusting gears 231 are different.

With such arrangement, by controlling the proportional relationship between the circumferential length of the adjusting gear 231 and the circumferential length of the matching gear 241, the movement strokes of the first pumping and pressing rod 111 and the second pumping and pressing rod 121 at the same time can be controlled accordingly, thereby controlling the liquid output of the first injection tube 11 and the second injection tube 12, so that the liquids of different components in the first injection tube 11 and the second injection tube 12 can be output to the mixing output tube 13 according to a preset ratio, and then output to containers such as infusion bottles or injection bottles.

1 to 8 , in the first embodiment of the present invention, the adjusting member 21 is slidably and rotatably sleeved on the first pumping rod 111 along the axial direction of the first pumping rod 111 ; the matching member 22 is rotatably sleeved on the second pumping rod 121 along the axial direction of the second pumping rod 121 .

With such arrangement, the adjusting member 21 can move along the axial direction of the first pressure rod 111 , thereby switching different proportional adjusting parts 23 to cooperate with corresponding proportional matching parts 24 .

Specifically, in the first embodiment of the present application, the adjusting rod 211 is rotatably and slidably sleeved on the first pumping rod 111 along the axial direction of the first pumping rod 111, and the matching rod 221 is rotatably sleeved on the second pumping rod 121 along the axial direction of the second pumping rod 121. The disk surfaces of the adjusting gear 231 and the matching gear 241 are parallel to the radial sections of the first pumping rod 111 and the second pumping rod 121.

It can be understood that the first withdrawal and pressure rod 111, the adjusting member 21, the matching member 22 and the second withdrawal and pressure rod 121 are linked in sequence. When force is applied to the first withdrawal and pressure rod 111, the first withdrawal and pressure rod 111 can squeeze the liquid in the first injection tube 11. At the same time, the first withdrawal and pressure rod 111 can drive the adjusting member 21 and the matching member 22 to rotate, thereby driving the second withdrawal and pressure rod 121 to move and squeeze the liquid in the second injection tube 12. Similarly, when force is applied to the second withdrawal and pressure rod 121, the second withdrawal and pressure rod 121 can squeeze the liquid in the second injection tube 12. When used, the second withdrawal and pressure rod 121 can drive the matching member 22 and the adjusting member 21 to rotate, thereby driving the first withdrawal and pressure rod 111 to move and squeeze the liquid in the first injection tube 11.

In other words, pressing either the first pumping rod 111 or the second pumping rod 121 can cause both to move simultaneously, the difference being that, at the same time, the moving stroke of the first pumping rod 111 and the moving stroke of the second pumping rod 121 will be limited by the adjusting member 21 and the matching member 22; specifically, after the gear shift, the ratio between the circumferential lengths of a set of adjusting gears 231 and the matching gears 241 that are in mutual meshing is equal to the ratio between the moving strokes of the first pumping rod 111 and the second pumping rod 121, and is also equal to the ratio between the volumes of liquid outputted from the first injection tube 11 and the second injection tube 12 to the mixing output tube 13.

For example, referring to FIGS. 2 to 5 , in one embodiment of the present invention, in order to facilitate the linkage between the first pressure rod 111 and the adjusting member 21, one of the outer circumferential wall of the first pressure rod 111 and the inner circumferential wall of the adjusting member 21 is provided with a convex thread 102, and the other is provided with a spiral groove 103. When the first pressure rod 111 moves, the adjusting member 21 can be driven to rotate by the cooperation of the thread 102 and the spiral groove 103. When the adjusting member 21 rotates, the first pressure rod 111 can be driven to move by the cooperation of the spiral groove 103 and the thread 102.

One of the outer circumferential wall of the second pressure rod 121 and the inner circumferential wall of the matching piece 22 is convexly provided with a thread 102, and the other is provided with a spiral groove 103. The movement of the second pressure rod 121 can drive the matching piece 22 to rotate through the cooperation of the thread 102 and the spiral groove 103. When the matching piece 22 rotates, the second pressure rod 121 can be driven to move through the cooperation of the spiral groove 103 and the thread 102.

With such arrangement, when force is applied to the first withdrawal and pressure rod 111 and the first withdrawal and pressure rod 111 moves downward, the thread 102 and the spiral groove 103 cooperate with each other to enable the adjusting rod 211 of the adjusting member 21 to rotate on the first withdrawal and pressure rod 111, and then the adjusting gear 231 and the matching gear 241 can drive the matching rod 221 to rotate, and the spiral groove 103 on the inner circumferential wall of the matching rod 221 cooperates with the thread 102 on the outer circumferential wall of the second withdrawal and pressure rod 121, so that the second withdrawal and pressure rod 121 can move downward at the same time; conversely, when force is applied to the second withdrawal and pressure rod 121, the second withdrawal and pressure rod 121 can also drive the first withdrawal and pressure rod 111 to move downward at the same time; the matching method of the thread 102 and the spiral groove 103 is simple, easy to manufacture, low cost, and does not take up much space during assembly and use.

Furthermore, in order to facilitate the adjustment member 21 to slide on the first pressure rod 111 and switch the matching gear position, in the present embodiment, the adjustment device 20 further includes a control member 25 , and the control member 25 includes an operating rod 251 and a connecting claw 252 that are connected to each other.

With such a configuration, the connecting claw 252 can be used to connect to the second pumping and pressing rod 121 , and the operating rod 251 is convenient for a person to control the connecting claw 252 to drive the second pumping and pressing rod 121 to move.

Specifically, the connecting claw 252 includes a first clamping portion 2521 and a second clamping portion 2522 which are spaced apart along the axial direction of the second pumping and pressing rod 121. The first clamping portion 2521 and the second clamping portion 2522 are rotatably clamped to the outer peripheral wall of the adjusting member 21, and the first clamping portion 2521 and the second clamping portion 2522 are respectively abutted against two opposite sides of the proportional adjusting portion 23. In other words, there is a gap between the first clamping portion 2521 and the second clamping portion 2522, and the gap can accommodate the proportional adjusting portion 23, so that the rotation of the proportional adjusting portion 23 in the circumferential direction is not restricted, but the up and down movement in the axial direction is restricted, so that the proportional adjusting portion 23 can only move synchronously in the axial direction following the connecting claw 252.

With such arrangement, the first clamping portion 2521 and the second clamping portion 2522 of the connecting claw 252 can be rotatably clamped on the outer peripheral wall of the adjusting member 21, which can ensure that when the adjusting member 21 drives the adjusting gear 231 to rotate, the movement in the circumferential direction will not be blocked by the connecting claw 252; the first clamping portion 2521 and the second clamping portion 2522 of the connecting claw 252 respectively abut against the two relatively opposite sides of the proportional adjustment portion 23, and can ensure that the connecting claw 252 can drive the adjusting member 21 to slide on the first pumping and pressing rod 111 through the proportional adjustment portion 23 in the axial direction, thereby switching different groups of proportional adjustment portions 23 and proportional matching portions 24 to cooperate with each other.

Please refer to Figure 3 again. It should be noted that the first clamping portion 2521 and the second clamping portion 2522 are both C-shaped. The C-shape facilitates the installation and clamping of the connecting claw 252 and the adjusting rod 211, and can relatively reduce the contact area with the adjusting rod 211, reduce friction, and facilitate the rotation of the adjusting rod 211.

Please refer to FIG. 3 again, and also to FIG. 7 and FIG. 8. Further, in order to facilitate the smoothness of the linkage between the first pumping and pressing rod 111 and the adjusting member 21, in the present embodiment, the adjusting rod 211 includes an outer rod body 2112 and an inner rod body 2111 connected to each other, the outer rod body 2112 can be slidably sleeved on the outer circumference of the inner rod body 2111, the spiral groove 103 is opened on the inner circumferential wall of the inner rod body 2111, and the adjusting gear 231 is sleeved on the outer circumferential wall of the outer rod body 2112; wherein, one of the inner circumferential wall of the outer rod body 2112 and the outer circumferential wall of the inner rod body 2111 is provided with a clamping groove 21121, and the other is convexly provided with a clamping block 21111, which is embedded in the clamping groove 21121 and can limit the relative rotation of the inner rod body 2111 and the outer rod body 2112 in the circumferential direction, but does not affect the outer rod body 2112 and the inner rod body 2111 sliding relative to each other in the axial direction. It should be noted that, in this embodiment, the outer rod body 2112 slides axially relative to the inner rod body 2111 .

Please refer to FIG. 7 and FIG. 8 again. In this embodiment, the inner wall of the outer rod body 2112 is provided with a clamping groove 21121 , and the outer wall of the inner rod body 2111 is provided with a clamping block 21111 convexly. The clamping block 21111 can slide in the clamping groove 21121 .

For example, in this embodiment, three ratio adjustment parts 23 are provided on the adjustment member 21, and three ratio matching parts 24 are correspondingly provided on the matching member 22. Specifically, in this embodiment, three groups of ratio adjustment parts 23 and ratio matching parts 24 are arranged and matched in sequence along the axial direction of the adjustment rod 211 and the matching rod 221. From the proximal end to the distal end of the double-chamber syringe 100, the adjustment ratios of the three groups of ratio adjustment parts 23 and the ratio matching parts 24 are set to 1:3, 3:1, and 1:2 in sequence.

It can be understood that in other embodiments, the adjustment ratio of the ratio adjustment part 23 and the ratio matching part 24 can also be set to other ratios, including but not limited to 1:1, 2:1, 1.5:1, etc., which are not listed here one by one.

It can be understood that in other embodiments, the number of matching gears is not limited and can be set according to needs, including but not limited to 1, 2 or more than 4; that is, multiple groups of proportional adjustment parts 23 and proportional matching parts 24 can be set.

Please refer to Figures 2 to 6 again. Further, in this embodiment, in one of the embodiments of the present invention, the adjustment device 20 also includes a reset gear. In the reset gear, the adjustment member 21 can slide to separate all the proportional adjustment parts 23 and all the proportional matching parts 24 from each other.

With such arrangement, in the preparation stage before mixing liquids of different components, the first injection tube 11 and the second injection tube 12 can pump and inject liquid without affecting each other; and when the double-chamber syringe 100 is not in use, the matching gear position can also be switched to the reset gear position, so that the first pumping rod 111 and the second pumping rod 121 can both be pushed into the tube for storing liquid in the injection tube, thereby reducing the storage space required for the double-chamber syringe 100 as a whole during storage.

Illustratively, in this embodiment, the reset position is set close to the proximal end of the dual-chamber syringe 100, that is, the position when the control member 25 slides to the position closest to the proximal end of the dual-chamber syringe 100 is the reset position.

Please refer to Figures 1 to 6 again. In order to ensure that the cooperation between the adjustment member 21 and the matching member 22 is safe, stable and not easily disturbed, in one embodiment of the present invention, the dual-chamber syringe 100 also includes a mounting shell 30, the adjustment member 21 and the matching member 22 are installed in the mounting shell 30, the first pumping rod 111 and the second pumping rod 121 axially penetrate the mounting shell 30 and protrude from the top wall of the mounting shell 30; a first adjustment hole 301 is opened on the side wall of the mounting shell 30, and the end of the operating rod 251 relatively away from the connecting claw 252 passes through the first adjustment hole 301 and can move along the first pumping rod 111 in the first adjustment hole 301.

With such arrangement, the installation positions of the adjusting member 21 and the matching member 22 are relatively stable and not easily disturbed by external factors, and the matching process is safer and more effective, which can effectively ensure the regulating effect of the adjusting member 21 and the matching member 22 on the liquid output ratio of the first injection tube 11 and the second injection tube 12.

Please refer to Figures 1 and 6 again. Further, for ease of use, a ratio marking portion 34 is also provided on the outer wall of the mounting shell 30. The ratio marking portion is provided at a position of the mounting shell 30 close to the first adjustment hole 301. The ratio marking portion 34 is used to indicate that when the operating rod 251 is in different positions, the matching gear position of the regulating device 20 corresponds to the adjustable liquid discharge ratio and the reset gear position.

Exemplarily, in this embodiment, different engagement positions are indicated by numerical ratios, and the reset position is indicated by the letter N.

Please refer to FIG. 3 and FIG. 6 again. Further, the first adjustment hole 301 includes an axially extending sliding channel 3011 and a plurality of spaced-apart snap-in channels 3012, and the plurality of snap-in channels 3012 are all connected to the sliding channel 3011. And the plurality of snap-in channels 3012 correspond to unused matching gears. When the matching gear needs to be switched, the operating rod 251 can slide axially in the sliding channel 3011, and selectively snap into the corresponding snap-in channel 3012 corresponding to the required liquid discharge ratio. This is to reduce or avoid the risk of the operating rod 251 moving due to accidental touch during the mixed liquid discharge process, thereby causing the matching gear to be switched by mistake.

Please refer to Fig. 1 again. Further, the mounting shell 30 includes a first shell 31 and a second shell 32 which are detachably connected. The first shell 31 and the second shell 32 are assembled to form an installation space for mounting the adjustment member 21 and the matching member 22. This arrangement facilitates the inspection and repair of the adjustment device 20 by copying the mounting shell 30.

Furthermore, a hook portion 33 is also provided on the first housing 31 and/or the second housing 32. The hook portion 33 facilitates the doctor to take the dual-chamber syringe 100, and facilitates the dual-chamber syringe 100 to be hung and stored.

Please refer to Figures 1 and 2 again. Further, in one embodiment of the present invention, the first suction and pressure rod 111 includes a first rod segment 1111 and a second rod segment 1112 connected to each other; wherein the first rod segment 1111 is used to pump and press the liquid, and the second rod segment 1112 is used to connect the adjusting member 21; the second suction and pressure rod 121 includes a third rod segment 1211 and a fourth rod segment 1212 connected to each other, the third rod segment 1211 is used to pump and press the liquid, and the fourth rod segment 1212 is used to connect the matching member 22.

With such a configuration, the first rod segment 1111 and the second rod segment 1112, and the third rod segment 1211 and the fourth rod segment 1212 have clear division of labor and are not likely to interfere with each other. Specifically, the first rod segment 1111 of the first pumping and pressing rod 111 can extend into the tube body of the first injection tube 11 to pump out the required drug solution, and the second rod segment 1112 can always be outside the tube body and stably cooperate with the adjustment member 21. The two have clear division of labor and are not likely to interfere with each other; the third rod segment 1211 and the fourth rod segment 1212 of the second pumping and pressing rod 121 are the same, and will not be repeated here.

It should be further explained that, in this embodiment, the first rod segment 1111 and the second rod segment 1112 are connected after being formed separately, and the third rod segment 1211 and the fourth rod segment 1212 are connected after being formed separately. Specifically, the first rod segment 1111 and the third rod segment 1211 are generally rod bodies that come with the syringe, which are easier to obtain and have lower costs. The second rod segment 1112 and the fourth rod segment 1212 are generally manufactured separately and then connected to the first rod segment 1111 and the third rod segment 1211 respectively.

It can be understood that in other embodiments, the first rod segment 1111 and the second rod segment 1112 , the third rod segment 1211 and the fourth rod segment 1212 may also be integrally formed.

Please refer to FIG. 2 and FIG. 3 again, it can be understood that the threads 102 are respectively disposed on the second rod segment 1112 and the fourth rod segment 1212 .

Please refer to FIG. 1 and FIG. 2 again. In one embodiment of the present invention, the mixing output pipe 13 is a Y-shaped three-way pipe.

Specifically, the Y-shaped three-way pipe has two liquid inlets 131 and one liquid outlet 132 , and the tube openings of the liquid storage tubes 101 of the first injection tube 11 and the second injection tube 12 are respectively connected to one of the liquid inlets 131 .

With such arrangement, the first injection tube 11 and the second injection tube 12 can enter the mixing output tube 13 through different liquid inlets 131 and liquid inlet channels respectively, and then be mixed and output from the liquid outlet 132 .

Please refer to FIG. 1 , FIG. 2 and FIG. 5 again. Further, the two-way syringe also includes a needle 40 , and the needle 40 is connected to the liquid outlet 132 .

Furthermore, the dual-chamber syringe 100 also includes a protective sleeve 50, which is detachably connected to the liquid outlet 132 and can be sleeved on the outer periphery of the liquid outlet needle 40 to protect the liquid outlet needle 40 and prevent the liquid outlet needle 40 from being contaminated or damaged or broken.

Please refer to Figures 9 to 14. The present application also provides a second embodiment. The inventive concept and most of the structures of the second embodiment are the same as those of the first embodiment, except that: in the second embodiment, the adjusting member 21 is slidably and rotatably connected to the first suction and pressure rod 111 along a direction perpendicular to the axis of the first suction and pressure rod 111; the matching member 22 is rotatably connected to the second suction and pressure rod 121 along a direction perpendicular to the axis of the second suction and pressure rod 121.

With such arrangement, the adjusting member 21 can move along the radial direction of the first pressure rod 111 , thereby switching different proportional adjusting parts 23 to cooperate with corresponding proportional matching parts 24 .

Please refer to FIG. 11 and FIG. 12 again. In this embodiment, the first pressure rod 111 is provided with a plurality of first strip-shaped tooth grooves 104 along the axial direction. The adjusting gear 231 on the adjusting member 21 is rotatably engaged with the first strip-shaped tooth grooves 104 and can slide in the first strip-shaped tooth grooves 104.

The second pressure rod 121 is provided with a plurality of second strip-shaped tooth grooves 105 along the axial direction, and at least one matching gear 241 on the matching member 22 is rotatably engaged with the first strip-shaped tooth grooves 104 .

Specifically, in this embodiment, the adjusting gear 231 on the adjusting member 21 can be rotatably engaged with the first strip-shaped tooth groove 104 along the axial direction of the first suction and pressure rod 111, and can slide in the first strip-shaped tooth groove 104 in the radial direction of the first suction and pressure rod 111; at least one mating gear 241 on the mating member 22 can be rotatably engaged with the first strip-shaped tooth groove 104 along the axial direction of the second suction and pressure rod 121.

With such arrangement, when force is applied to the first pressure rod 111 and the first pressure rod 111 moves downward, the plurality of first strip-shaped tooth grooves 104 can mesh with the adjusting gear 231 in sequence, thereby driving the adjusting gear 231 and the matching gear 241 to rotate in sequence, and then the matching gear 241 can mesh with the plurality of second strip-shaped tooth grooves 105 on the second pressure rod 121 in sequence, driving the second pressure rod 121 to move downward at the same time; conversely, when force is applied to the second pressure rod 121, the second pressure rod 121 can also drive the first pressure rod 111 to move downward at the same time; the cooperation between the gears and the strip-shaped tooth grooves makes it simple and convenient to link the first pressure rod 111 and the adjusting member 21, and the second pressure rod 121 and the matching member 22 in a linkage manner, and the manufacturing is relatively simpler and the cost is lower, and it does not take up much space during assembly and use.

Please refer to Figures 11 and 12 again. Further, in this embodiment, the dual-chamber syringe 100 is provided with three matching gears, and the liquid discharge ratios corresponding to the three matching gears are 1:3, 1:1, and 2:1. It can be understood that in other embodiments, the number of matching gears and the liquid discharge ratio corresponding to each matching gear can be selected according to needs, and there is no limitation here.

Please refer to Figures 9 and 14 again. In this embodiment, the dual-chamber syringe 100 also includes a mounting shell 30, the adjusting member 21 and the matching member 22 are installed on the mounting shell 30, the first pumping rod 111 and the second pumping rod 121 axially penetrate the mounting shell 30 and protrude from the top wall of the mounting shell 30; a second adjusting hole 302 is opened on the side wall of the mounting shell 30, one end of the adjusting member 21 passes through the second adjusting hole 302 and can move in the second adjusting hole 302 and the mounting shell 30 along the axial direction of the adjusting member 21.

With such arrangement, the installation positions of the adjusting member 21 and the matching member 22 are relatively stable and not easily disturbed by external factors, and the matching process is safer and more effective, which can effectively ensure the regulating effect of the adjusting member 21 and the matching member 22 on the liquid output ratio of the first injection tube 11 and the second injection tube 12.

Please refer to Figures 10 and 14 again. Further, in order to further facilitate the switching of the reset gear and different matching gears, in the second embodiment of the present application, two opposite side walls of the mounting shell 30 are provided with second adjustment holes 302, and the two ends of the adjusting member 21 respectively pass through the two second adjustment holes 302, and can move in the second adjustment holes 302 and the mounting shell 30 along the axial direction of the adjusting member 21.

With such arrangement, the user can control the adjustment member 21 on either side, so as to quickly switch between the reset gear position and different matching gear positions.

In the double-chamber syringe 100 provided by the present invention, the liquid output of the first injection tube 11 and the second injection tube 12 can be adjusted by the cooperation of different proportion adjustment parts 23 on the adjusting part 21 and the corresponding proportion matching parts 24 on the matching part 22; in different clinical use scenarios, the volume of fluids with different components can be adjusted without changing the specifications and sizes of the injection tubes to meet the mixing requirements of different volumes.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims (10)

1. A double-cavity syringe, which comprises a syringe body, characterized by comprising the following steps:

the injection device (10) comprises a first injection tube (11), a second injection tube (12) and a mixing output tube (13), wherein the first injection tube (11) and the second injection tube (12) are respectively connected with the mixing output tube (13); and

An adjusting device (20) comprising an adjusting member (21) and a mating member (22); the adjusting piece (21) is slidably and rotatably connected to a first pumping rod (111) of the first injection tube (11), and the matching piece (22) is rotatably connected to a second pumping rod (121) of the second injection tube (12); force is applied to one of the first pumping rod (111) and the second pumping rod (121), and the other pumping rod can be linked under the matching action of the adjusting piece (21) and the matching piece (22);

One or more different proportion adjusting parts (23) are arranged on the adjusting piece (21), corresponding proportion matching parts (24) are arranged on the matching piece (22), and each proportion adjusting part (23) can be matched with the corresponding proportion matching part (24) to form a matching gear.

2. The dual chamber syringe of claim 1 wherein said adjustment member (21) is capable of slidably switching the mating gear to mate one of said ratio adjustment portions (23) on said adjustment member (21) with a corresponding one of said ratio mating portions (24) on said mating member (22) to adjust the ratio of the fluid from said first syringe (11) and said second syringe (12);

The proportion adjustment part (23) comprises an adjustment gear (231), and the proportion matching part (24) comprises a matching gear (241) capable of being meshed with the adjustment gear (231); the adjusting piece (21) comprises an adjusting rod (211), and the matching piece (22) comprises a matching rod (221);

Wherein all the adjusting gears (231) are sleeved on the adjusting rod (211) at intervals, and all the matching gears (241) are sleeved on the matching rod (221) at intervals; -the total circumferential length of each set of adjustment gears (231) and the mating gears (241) is equal; the circumferential lengths of the adjustment gears (231) of different groups are unequal.

3. The dual chamber syringe of claim 2 wherein the adjustment member (21) is slidably disposed along the axial direction of the first pumping rod (111) and rotatably sleeved on the first pumping rod (111); the matching piece (22) is rotatably sleeved on the second pumping rod (121) along the axial direction of the second pumping rod (121).

4. A dual-chamber syringe as claimed in claim 3, wherein one of the outer peripheral wall of the first pumping rod (111) and the inner peripheral wall of the adjusting member (21) is provided with a screw thread (102) in a protruding manner, the other is provided with a screw groove (103), the adjusting member (21) can be driven to rotate by the cooperation of the screw thread (102) and the screw groove (103) when the first pumping rod (111) moves, and the adjusting member (21) can be driven to move by the cooperation of the screw groove (103) and the screw thread (102) when the adjusting member (21) rotates;

One of the outer peripheral wall of the second pumping rod (121) and the inner peripheral wall of the matching piece (22) is convexly provided with a thread (102), the other one is provided with a spiral groove (103), the second pumping rod (121) can move through the matching of the thread (102) and the spiral groove (103) to drive the matching piece (22) to rotate, and the matching piece (22) can move through the matching of the spiral groove (103) and the thread (102) to drive the second pumping rod (121) to move when rotating.

5. A dual chamber syringe as claimed in claim 3 or 4, wherein the adjustment means (20) further comprises a control member (25), the control member (25) comprising an interconnecting lever (251) and a connecting claw (252).

6. The dual chamber syringe of claim 5 wherein the dual chamber syringe (100) further comprises a mounting housing (30), the adjustment member (21) and the mating member (22) are mounted to the mounting housing (30), and the first and second withdrawal struts (111, 121) axially extend through the mounting housing (30) and protrude from a top wall of the mounting housing (30); the side wall of the mounting shell (30) is provided with a first adjusting hole (301), and one end, relatively far away from the connecting claw (252), of the operating rod (251) penetrates out of the first adjusting hole (301) and can move along the first pumping rod (111) in the first adjusting hole (301).

7. Dual chamber syringe according to claim 2, characterized in that the adjustment member (21) is slidably and rotatably connected to the first pumping rod (111) in a direction perpendicular to the axis of the first pumping rod (111); the mating member (22) is rotatably connected to the second suction rod (121) in a direction perpendicular to the axis of the second suction rod (121).

8. The dual chamber syringe of claim 7 wherein the first pumping rod (111) is provided with a plurality of first bar-shaped slots (104) along an axial direction, and the adjusting gear (231) on the adjusting member (21) is rotatably engaged with the first bar-shaped slots (104) and can slide in the first bar-shaped slots (104);

The second pumping rod (121) is provided with a plurality of second strip-shaped tooth grooves (105) along the axial direction, and at least one matching gear (241) on the matching piece (22) can be rotatably meshed with the first strip-shaped tooth grooves (104).

9. The dual chamber syringe of claim 7 wherein the dual chamber syringe (100) further comprises a mounting housing (30), the adjustment member (21) and the mating member (22) are mounted to the mounting housing (30), and the first and second withdrawal struts (111, 121) axially extend through the mounting housing (30) and protrude from a top wall of the mounting housing (30); the side wall of the mounting shell (30) is provided with a second adjusting hole (302), one end of the adjusting piece (21) penetrates out of the second adjusting hole (302) and can move in the second adjusting hole (302) and the mounting shell (30) along the axial direction of the adjusting piece (21).

10. The dual chamber syringe of claim 1 wherein the adjustment means (20) further comprises a reset gear in which the adjustment member (21) is slidable to separate all of the ratio adjustment portions (23) from all of the ratio engagement portions (24); and/or the number of the groups of groups,

The first pumping rod (111) comprises a first rod section (1111) and a second rod section (1112) which are connected with each other;

wherein the first rod section (1111) is used for pumping liquid, and the second rod section (1112) is used for connecting the adjusting piece (21); and/or the number of the groups of groups,

The second pumping rod (121) comprises a third rod section (1211) and a fourth rod section (1212) which are connected with each other, the fourth rod section (1212) is used for pumping liquid, and the third rod section (1211) is used for connecting the matching piece (22).