A micro-quantitative drug dispensing device for a syringe

Abstract

The present invention discloses a micro-quantitative drug extraction and dispensing device for a syringe, comprising a shell, a first dial wheel, a second dial wheel, a rotating shaft, a gear, a push rod, and a limit device. The first dial wheel and the second dial wheel are rotatably arranged on the shell through the rotating shaft, the gear is arranged on the rotating shaft, the push rod is slidably arranged inside the shell, and the limit device is slidably arranged inside the shell. The present invention has the advantages of simple structure, convenient operation, safety and reliability, and can quantitatively extract drug liquid during drug extraction and dispensing for intravenous and intramuscular injections, thereby avoiding problems such as waste of drug liquid, inaccurate drug dosage, influence on disease treatment, and waste of medical staff's time.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a micro-quantitative drug extraction and dispensing device for a syringe. Background Art

[0002] When medical staff give patients intravenous or intramuscular injections, they often need to mix two or more liquid medicines according to the doctor's instructions and then inject them into the patient. The current method for medical staff to mix liquid medicines is to directly use a syringe to extract the required liquid medicine from different medicine bottles. The amount of medicine extracted is completely controlled by the hands and experience of the medical staff. During the extraction process of the first medicine, if there is too much, the excess amount of medicine can be pushed out of the syringe and discharged into the trash can. Although this causes a waste of liquid medicine, it can also solve the possibility of discharging too much liquid medicine and ensure the dosage and safety of the medicine. If the second medicine is also extracted with the same syringe, there may be more or less medicine. But it is not accurate, especially in the neonatal department where the amount of medicine used is extremely small. Sometimes 0.5 ml or less of medicine needs to be drawn. It is difficult for people to ensure the accuracy of these amounts with their eyes, so medical staff thought of using a 1 ml syringe to draw the medicine and then push the medicine into a 10 ml or 5 ml syringe before giving it to the child. This process not only wastes the medical staff's time, but also reduces a lot of medicine and cannot guarantee the accuracy of the child's medication. Imagine that only 0.5 ml or 1 ml of medicine is injected at a time. How much medicine will be wasted through this process? No one has counted it, but it is indeed a very serious problem for newborns and children. At present, most of the quantitative drug dispensing devices exist in laboratories, and a process of direct injection after drawing is adopted, and the drug does not need to be sucked back into the quantitative drug dispensing device, but can be directly pushed into a fixed container. So far, there has been no search in China or the world for a micro-quantitative drug dispensing device for ordinary intravenous and intramuscular injection. Therefore, a micro-quantitative drug dispensing device for intravenous and intramuscular injection is urgently needed to solve the above-mentioned problems such as waste of liquid medicine, inaccurate dosage, influence on disease treatment and waste of medical staff's time. Summary of the invention

[0003] The object of the present invention is to provide a micro-quantitative drug dispensing device for a syringe in order to solve the problems in the above-mentioned background technology.

[0004] An auxiliary quantitative drug extraction device for a syringe comprises a housing, a first dial wheel, a second dial wheel, a rotating shaft, a gear, a push rod, and a limit device. The first dial wheel and the second dial wheel are rotatably arranged on the housing through the rotating shaft, the gear is arranged on the rotating shaft, the push rod is slidably arranged inside the housing, and the limit device is slidably arranged inside the housing;

[0005] The housing is provided with a card slot, a scale and a syringe placement slot;

[0006] The push rod comprises a moving rod, a first locking screw and a telescopic rod, the telescopic rod is slidably arranged inside the moving rod, and the position of the telescopic rod is locked by the first locking screw;

[0007] The moving rod is provided with a rack, a threaded hole, a clamping block and a sliding groove;

[0008] The telescopic rod is provided with a groove;

[0009] Specifically, the telescopic rod is arranged in the slide groove, and the first locking screw is screwed into the threaded hole. When the extension amount of the telescopic rod needs to be adjusted, the first locking screw is loosened, and the telescopic rod can slide freely in the slide groove. When the required length is adjusted, the first locking screw is tightened, and the position of the telescopic rod is also locked by the first locking screw.

[0010] The gear is meshed with the rack;

[0011] Specifically, when the push rod needs to be moved, the medical staff manually moves the first and second dial wheels, and the first and second dial wheels drive the gears to rotate through the rotating shaft, and the gears drive the moving rod to make a linear motion through the rack meshing therewith, thereby driving the entire push rod to make a linear motion;

[0012] The limiting device includes a stopper, a pointer and a second locking screw, the pointer is symmetrically arranged on the stopper, the second locking screw passes through a threaded hole on the stopper, and the second locking screw is symmetrically arranged on both sides of the stopper;

[0013] Specifically, the limit device can slide inside the shell and be fixed in position by the second locking screw. When the limit device needs to be moved, the second locking screws on both sides of the stopper are loosened, and the bottom ends of the second locking screws leave the inner wall of the shell. At this time, the limit device cannot slide freely in the shell. When the limit device is adjusted to a required position, the second locking screws on both sides of the stopper are tightened to fix the position of the limit device.

[0014] Specifically, the function of the stopper is to limit the moving distance of the push rod. The stopper cooperates with the card block on the moving rod so that when the push rod moves to a certain distance, the stopper blocks the card block, thereby achieving the purpose of limiting the moving distance of the push rod.

[0015] Working principle and process of the present invention:

[0016] During use, when the medical staff needs to prepare the medicine, in the first case, when there is no medicine in the syringe, the medical staff loosens the second locking screw and adjusts the limit device. The pointer of the limit device indicates the amount of medicine to be extracted. Because the shell is provided with a scale, when the pointer is adjusted to the scale to be extracted, the second locking screw is tightened. At this time, the limit device is fixed, and then the syringe barrel is placed in the syringe placement slot, and the tail of the syringe is stuck in the slot. The syringe is axially positioned, and the tail of the syringe push rod is stuck in the groove on the telescopic rod. At this time, the syringe push rod is axially positioned, and the medical staff holds the syringe and the device with his hands, and then uses his thumb to turn the first dial and the second dial. The first dial and the second dial drive the gear to rotate through the rotating shaft, and the gear drives the moving rod to move in a straight line through the rack meshing therewith. When the syringe reaches the scale specified by the pointer, the stopper blocks the block, the push rod stops moving, and the syringe push rod also stops moving. At this time, the amount of liquid medicine entering the syringe is the amount of liquid medicine at the scale specified by the pointer; in the second case, when there is already liquid medicine in the syringe, the position of the syringe push rod is not the initial position at this time, so the medical staff needs to adjust the extension amount of the telescopic rod. First, loosen the first locking screw, and the telescopic rod can slide freely in the slide groove. When the extension amount of the telescopic rod is adjusted to match the position of the syringe push rod, tighten the first locking screw, and the position of the telescopic rod is also locked by the first locking screw. Then repeat the operation of the first case to achieve quantitative extraction of liquid medicine.

[0017] Beneficial effects of the present invention:

[0018] The invention has the advantages of simple structure, convenient operation, safety and reliability, and can realize quantitative extraction of liquid medicine when drawing and dispensing medicine for intravenous and intramuscular injection, thereby avoiding problems such as waste of liquid medicine, inaccurate dosage, influence on disease treatment and waste of medical staff's time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0021] Figure 3 is a top view of the present invention;

[0022] Figure 4 The present invention Figure 3 Section view in the AA direction;

[0023] Figure 5 It is a three-dimensional schematic diagram of the push rod of the present invention;

[0024] Figure 6is a three-dimensional schematic diagram of the mobile rod of the present invention;

[0025] Figure 7 is a three-dimensional schematic diagram of the limiting device of the present invention;

[0026] Figure 8 It is a stereoscopic schematic diagram of the present invention when used in conjunction with a syringe. DETAILED DESCRIPTION

[0027] See also Figures 1 to 8 As shown, an auxiliary quantitative drug extraction device for a syringe comprises a housing 1, a first dial wheel 2, a second dial wheel 3, a rotating shaft 4, a gear 5, a push rod 6, and a limit device 7. The first dial wheel 2 and the second dial wheel 3 are rotatably arranged on the housing 1 through the rotating shaft 4, the gear 5 is arranged on the rotating shaft 4, the push rod 6 is slidably arranged inside the housing 1, and the limit device 7 is slidably arranged inside the housing 1;

[0028] The housing 1 is provided with a card slot 11, a scale 12 and a syringe placement slot 13;

[0029] The push rod 6 includes a moving rod 61, a first locking screw 62 and a telescopic rod 63. The telescopic rod 63 is slidably arranged inside the moving rod 61. The position of the telescopic rod 63 is locked by the first locking screw 62.

[0030] The moving rod 61 is provided with a rack 611, a threaded hole 612, a block 613 and a slide groove 614;

[0031] The telescopic rod 63 is provided with a groove 631;

[0032] Specifically, the telescopic rod 63 is arranged in the slide groove 614, and the first locking screw 62 is screwed into the threaded hole 612. When the extension amount of the telescopic rod 63 needs to be adjusted, the first locking screw 62 is loosened, and the telescopic rod 63 can slide freely in the slide groove 614. When the required length is adjusted, the first locking screw 62 is tightened, and the position of the telescopic rod 63 is also locked by the first locking screw 62.

[0033] The gear 5 is meshed with the rack 611;

[0034] Specifically, when the push rod 6 needs to be moved, the medical staff manually moves the first dial wheel 2 and the second dial wheel 3, and the first dial wheel 2 and the second dial wheel 3 drive the gear 5 to rotate through the rotating shaft 4, and the gear 5 drives the moving rod 61 to make a linear motion through the rack 611 meshing therewith, thereby driving the entire push rod 6 to make a linear motion;

[0035] The limiting device 7 includes a stopper 71, a pointer 72 and a second locking screw 73. The pointer 72 is symmetrically arranged on the stopper 71. The second locking screw 73 passes through a threaded hole on the stopper 71. The second locking screw 73 is symmetrically arranged on both sides of the stopper 71.

[0036] Specifically, the limiting device 7 can slide inside the housing 1 and be fixed in position by the second locking screws 73. When the limiting device 7 needs to be moved, the second locking screws 73 on both sides of the stopper 71 are loosened, and the bottom ends of the second locking screws 73 leave the inner wall of the housing 1. At this time, the limiting device 7 cannot slide freely in the housing 1. When the limiting device 7 is adjusted to a required position, the second locking screws 73 on both sides of the stopper 71 are tightened, and the position of the limiting device 7 is fixed.

[0037] Specifically, the function of the stopper 71 is to limit the moving distance of the push rod 6. The stopper 71 cooperates with the block 613 on the moving rod 61 so that when the push rod 6 moves to a certain distance, the stopper 71 blocks the block 613, thereby achieving the purpose of limiting the moving distance of the push rod 6.

[0038] Working principle and process of the present invention:

[0039] See also Figures 1 to 8 As shown, during use, when the medical staff needs to prepare the medicine, in the first case, when there is no medicine in the syringe, the medical staff loosens the second locking screw 73 and adjusts the limit device 7. The pointer 72 of the limit device 7 indicates the amount of medicine to be extracted. Because the housing 1 is provided with a scale 12, when the pointer 72 is adjusted to the scale to be extracted, the second locking screw 73 is tightened. At this time, the limit device 7 is fixed, and then the syringe barrel is placed in the syringe placement groove 13, and the tail of the syringe is inserted into the inside of the slot 11. The syringe is axially positioned, and the tail of the syringe push rod is inserted into the groove 631 on the telescopic rod 63. At this time, the syringe push rod is axially positioned, and the medical staff holds the syringe and the device with their hands, and then uses the thumb to turn the first dial 2 and the second dial 3. The first dial 2 and the second dial 3 drive the gear 5 to rotate through the rotating shaft 4, and the gear 5 drives the moving rod 6 through the rack 611 meshing therewith. 1 makes a linear motion, thereby driving the entire push rod 6 to make a linear motion, the push rod 6 drives the syringe push rod to make a linear motion, and the drug liquid enters the syringe through the movement of the syringe push rod. When it reaches the scale specified by the pointer 72, the block 71 blocks the block 613, the push rod 6 stops moving, and the syringe push rod also stops moving. At this time, the amount of drug liquid entering the syringe is the amount of drug liquid at the scale specified by the pointer 72; in the second case, when there is already drug liquid in the syringe, the position of the syringe push rod is not the initial position at this time, so the medical staff needs to adjust the extension amount of the telescopic rod 63. First, loosen the first locking screw 62, and the telescopic rod 63 can slide freely in the slide groove 614. When the extension amount of the telescopic rod 63 is adjusted to match the position of the syringe push rod, tighten the first locking screw 62, and the position of the telescopic rod 63 is also locked by the first locking screw 62. Then repeat the operation of the first case to achieve quantitative extraction of the drug liquid.

Claims

1. A micro-quantitative drug dispensing device for a syringe, characterized in that: The invention comprises a housing (1), a first dial wheel (2), a second dial wheel (3), a rotating shaft (4), a gear (5), a push rod (6), and a limiting device (7); the first dial wheel (2) and the second dial wheel (3) are rotatably arranged on the housing (1) via the rotating shaft (4); the gear (5) is arranged on the rotating shaft (4); the push rod (6) is slidably arranged inside the housing (1); and the limiting device (7) is slidably arranged inside the housing (1); The housing (1) is provided with a card slot (11), a scale (12) and a syringe placement slot (13); The push rod (6) comprises a moving rod (61), a first locking screw (62) and a telescopic rod (63), wherein the telescopic rod (63) is slidably arranged inside the moving rod (61), and the position of the telescopic rod (63) is locked by the first locking screw (62); The moving rod (61) is provided with a rack (611), a threaded hole (612), a clamping block (613) and a sliding groove (614); The telescopic rod (63) is provided with a groove (631); The telescopic rod (63) is arranged in the slide groove (614), and the first locking screw (62) is screwed into the threaded hole (612). When the extension amount of the telescopic rod (63) needs to be adjusted, the first locking screw (62) is loosened, and the telescopic rod (63) can slide freely in the slide groove (614). When the required length is adjusted, the first locking screw (62) is tightened, and the position of the telescopic rod (63) is also locked by the first locking screw (62); The gear (5) is meshed with the rack (611); When the push rod (6) needs to be moved, the medical staff manually moves the first dial wheel (2) and the second dial wheel (3), and the first dial wheel (2) and the second dial wheel (3) drive the gear (5) to rotate via the rotating shaft (4), and the gear (5) drives the moving rod (61) to perform linear motion via the rack (611) meshing therewith, thereby driving the entire push rod (6) to perform linear motion; The limiting device (7) comprises a stopper (71), a pointer (72) and a second locking screw (73), wherein the pointer (72) is symmetrically arranged on the stopper (71), the second locking screw (73) passes through a threaded hole on the stopper (71), and the second locking screw (73) is symmetrically arranged on both sides of the stopper (71); The limiting device (7) can slide inside the housing (1) and be fixed in position by the second locking screw (73). When it is necessary to move the limiting device (7), the second locking screws (73) on both sides of the stopper (71) are loosened, and the bottom ends of the second locking screws (73) leave the inner wall of the housing (1). At this time, the limiting device (7) can not slide freely in the housing (1). When the limiting device (7) is adjusted to a required position, the second locking screws (73) on both sides of the stopper (71) are tightened, and the position of the limiting device (7) is fixed. The function of the stopper (71) is to limit the moving distance of the push rod (6). The stopper (71) cooperates with the clamping block (613) on the moving rod (61), so that when the push rod (6) moves to a certain distance, the stopper (71) clamps the clamping block (613), thereby achieving the purpose of limiting the moving distance of the push rod (6). When the medical staff needs to prepare the liquid medicine, in the first case, when there is no liquid medicine in the syringe, the medical staff loosens the second locking screw (73), adjusts the limit device (7), and uses the pointer (72) of the limit device (7) to indicate the amount of liquid medicine to be drawn. Because the housing (1) is provided with a scale (12), when the pointer (72) is adjusted to the scale to be drawn, the second locking screw (73) is tightened, and the limit device (7) is fixed at this time, and then the syringe barrel is placed in the syringe barrel. The syringe is inserted into the slot (13), the tail of the syringe is inserted into the slot (11), and the syringe is axially positioned. The tail of the syringe push rod is inserted into the groove (631) on the telescopic rod (63). At this time, the syringe push rod is axially positioned. The medical staff holds the syringe and the device with their hands, and then uses the thumb to turn the first dial wheel (2) and the second dial wheel (3). The first dial wheel (2) and the second dial wheel (3) drive the gear (5) to rotate through the rotating shaft (4), and the gear (5) drives the moving rod through the rack (611) meshing therewith. (61) makes a linear motion, thereby driving the entire push rod (6) to make a linear motion, and the push rod (6) drives the syringe push rod to make a linear motion, and the liquid medicine enters the syringe barrel through the movement of the syringe push rod. When the scale specified by the pointer (72) is reached, the stopper (71) blocks the block (613), the push rod (6) stops moving, and the syringe push rod also stops moving. At this time, the amount of liquid medicine entering the syringe barrel is the amount of liquid medicine at the scale specified by the pointer (72); in the second case, when there is already liquid medicine in the syringe, the syringe is filled with liquid medicine. The position of the injector push rod is not the initial position, so the medical staff needs to adjust the extension amount of the telescopic rod (63). First, the first locking screw (62) is loosened, and the telescopic rod (63) can slide freely in the slide groove (614). When the extension amount of the telescopic rod (63) is adjusted to match the position of the injector push rod, the first locking screw (62) is tightened, and the position of the telescopic rod (63) is also locked by the first locking screw (62). Then, the operation of the first case is repeated to realize quantitative extraction of the liquid medicine.

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