Medicine injection needle passing performance testing device

Abstract

The utility model discloses a device for testing the needle passing performance of a medicine injection. The device comprises an equipment base; a box body and a fixing frame are installed at the top of the equipment base, an injector is arranged at the top of the fixing frame through a clamping piece, one end of the injector penetrates into an inner cavity of the fixing frame and is provided with an injection needle, a supporting arm is movably arranged in an inner cavity of the box body, and the supporting arm penetrates through the box body and extends outwards; according to the utility model, the lifting assembly is arranged in the box body to move the support arm up and down, then the injector is pushed and pulled through the mounting seat, so that liquid medicine is sucked and discharged by the injector, and then the injection needle is mounted on the injector, so that the needle passing performance of medicine passing through the injection needle can be detected when the mounting seat moves up and down; meanwhile, the device is further provided with a pressure sensor and a display screen, the push-pull force of the injector is visually displayed on the display screen, the needle passing performance of the medicine is accurately reflected, the structure is simple, operation is easy, and the testing period is short.

Description

Technical Field

[0001] The utility model relates to the technical field of drug detection, in particular to a needle penetration test device for drug injections. Background Technique

[0002] The needle penetration of an injection refers to evaluating the ease with which the injection solution passes through a syringe, which is an important index for evaluating the quality of an injection. Good needle penetration is a prerequisite for ensuring that the drug smoothly and accurately enters the organism and has an important impact on the compliance of the product. However, there is currently no unified standard for evaluating the needle penetration of drugs. Previous evaluations of needle penetration mainly involved manually pushing the liquid medicine out of a specific type of needle with force and judging the needle penetration based on the resistance and the shape of the liquid leaving the needle, or using a specific type of injection needle to aspirate the injection solution and using the amount of liquid medicine that can be aspirated per minute as an index to judge the needle penetration. These methods are highly subjective, and it is difficult to precisely control the pushing and pulling speed of the hand, resulting in poor repeatability of the results. For this reason, many scholars have strived to develop some special instruments to measure needle penetration, making the measurement results more accurate and repeatable. For example, CN 105353096 discloses a device for measuring the needle penetration of an injection, which uses a weight to pressurize the syringe and determines the needle penetration by measuring the time for a certain amount of liquid to flow out of the syringe. This device effectively solves the problem of constant pressurization and avoids the errors caused by human factors during the manual injection test of needle penetration. However, since the weight moves at an accelerating speed when descending and the speed will become faster and faster, the outflow speed of the liquid is also related to the height of the liquid. Improper selection of the initial height will lead to excessive experimental errors. Literature [Cilurzo F, Selmin F, Minghetti P, et al. Injectability Evaluation: An Open Issue. AAPS PharmSciTech, 2011, 12(2): 604-609] etc. use a texture analyzer to make the piston rod of the syringe move at a constant speed and test the needle penetration by measuring the pressurizing force, obtaining good results. However, the texture analyzer is a general device without a device for fixing the syringe. Manual fixing by the test personnel is prone to tilting and is extremely inconvenient. For this reason, this patent designs a new type of syringe fixing device, which is matched with a texture analyzer and other mechanical control and measurement devices for the needle penetration test of injection solutions. Content of the Utility Model

[0003] The purpose of the utility model is to provide a needle penetration test device for drug injections. The lifting component drives the support arm to move up and down, and then the mounting seat installed on the support arm is used to push and pull the piston rod of the syringe to realize the aspiration and ejection of the injection solution, detect the pushing and pulling force, and thus quantitatively determine the needle penetration of the injection solution. The device has a simple structure and is easy to operate, and can intuitively reflect the test results, so as to solve the problems raised in the above background technique.

[0004] To achieve the above object, the utility model provides the following technical solutions: A drug injection needle penetration test device, comprising:

[0005] A device base;

[0006] A box body and a fixing frame are installed on the top of the device base. A syringe is arranged on the top of the fixing frame through a clamping member. One end of the syringe penetrates into the inner cavity of the fixing frame and is equipped with an injection needle. An arm is movably arranged in the inner cavity of the box body. The arm penetrates through the box body and extends outwards. An installation seat is installed at the bottom of the arm. A limiting groove is formed in the installation seat. The end of the syringe piston rod away from the injection needle is clamped in the limiting groove. A lifting component for moving the arm up and down is arranged in the inner cavity of the box body.

[0007] Preferably, the clamping member includes a fixing plate fixed on the top of the fixing frame. An elastic plate is fixed on the top of the fixing plate. The ear plate on the outer side of the syringe is located between the fixing plate and the elastic plate. A through hole is formed in the top of the elastic plate, and a locking bolt is movably arranged in the inner cavity of the through hole. The locking bolt penetrates through the through hole and is threadedly connected with the fixing plate.

[0008] Preferably, a support plate is movably arranged in the inner cavity of the fixing frame. Long grooves are formed on both sides of the fixing frame. Bolt columns are fixed on both sides of the support plate. The bolt columns penetrate through the long grooves and are threadedly connected with limiting nuts.

[0009] Preferably, it further includes a pressure sensor installed inside the limiting groove. A display screen is embedded on the outside of the device base. The pressure sensor is electrically connected with the display screen.

[0010] Preferably, a collection bottle is placed on the top of the support plate. The injection needle penetrates into the inner cavity of the collection bottle.

[0011] Preferably, the lifting component includes a threaded sleeve fixedly embedded in the arm. A lifting screw rod is threadedly connected in the inner cavity of the threaded sleeve. One end of the lifting screw rod rotates in the inner cavity of the box body through a bearing. A driving device for driving the lifting screw rod is fixed in the inner cavity of the box body. A control switch is installed on the top of the device base.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model moves the support arm up and down by arranging a lifting component in the box body, then pushes and pulls the syringe through the mounting seat to realize the suction and discharge of the liquid medicine by the syringe, and then installs the injection needle on the syringe. When the mounting seat moves up and down, the needle passing performance of the medicine passing through the injection needle can be detected. At the same time, the device is also equipped with a pressure sensor and a display screen to directly display the pushing and pulling force of the syringe on the display screen, accurately reflecting the needle passing performance of the medicine. The structure is simple and easy to operate, and the test period is short.

[0014] 2. The utility model supports the collection bottle through the support plate, and then inserts the injection needle into the collection bottle to complete the suction and collection of the liquid medicine. Description of the Drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 is a partial three-dimensional structural schematic diagram of the utility model;

[0017] Figure 3 is a split three-dimensional structural schematic diagram of the fixed frame of the utility model;

[0018] Figure 4 is a three-dimensional structural schematic diagram of the mounting seat and the syringe of the utility model.

[0019] Reference numerals in the drawings: 1, equipment base; 2, box body; 3, fixed frame; 4, syringe; 5, injection needle; 6, support arm; 7, mounting seat; 8, limit groove; 9, lifting component; 91, threaded sleeve; 92, lifting screw; 93, control switch; 10, clamping piece; 101, fixing plate; 102, elastic plate; 103, locking bolt; 11, support plate; 12, long groove; 13, bolt column; 14, limit nut; 15, pressure sensor; 16, display screen; 17, collection bottle. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] The present utility model provides a Figures 1 to 4 as shown drug injection needle passing performance testing device, including:

[0022] equipment base 1;

[0023] At the top of the equipment base 1, a box body 2 and a fixing frame 3 are installed. At the top of the fixing frame 3, a syringe 4 is arranged through a clamping member 10. One end of the syringe 4 penetrates into the inner cavity of the fixing frame 3 and is equipped with an injection needle 5. An arm 6 is movably arranged in the inner cavity of the box body 2. The arm 6 penetrates through the box body 2 and extends outwards. A mounting seat 7 is installed at the bottom of the arm 6. A limiting groove 8 is formed in the mounting seat 7. One end of the piston rod of the syringe 4 away from the injection needle 5 is clamped in the limiting groove 8. A lifting assembly 9 for moving the arm 6 up and down is arranged in the inner cavity of the box body 2;

[0024] By arranging the lifting assembly 9 in the box body 2 to move the arm 6 up and down, and then pushing and pulling the syringe 4 through the mounting seat 7, the syringe 4 can suck and discharge the liquid medicine. Then, by installing the injection needle 5 on the syringe 4, when the mounting seat 7 moves up and down, the needle passing performance of the medicine passing through the injection needle 5 can be detected. At the same time, this device is also equipped with a pressure sensor 15 and a display screen 16, which can directly display the pushing and pulling force of the syringe 4 on the display screen 16, accurately reflecting the needle passing performance of the medicine. The structure is simple and easy to operate, and the test period is short.

[0025] The clamping member 10 includes a fixing plate 101 fixed to the top of the fixing frame 3. An elastic plate 102 is fixed to the top of the fixing plate 101. The ear plate on the outer side of the syringe 4 is located between the fixing plate 101 and the elastic plate 102. A through hole is formed in the top of the elastic plate 102, and a locking bolt 103 is movably arranged in the inner cavity of the through hole. The locking bolt 103 penetrates through the through hole and is threadedly connected to the fixing plate 101. Through the setting of the structure of the clamping member 10, it is convenient to clamp the ear plate of the syringe 4 between the fixing plate 101 and the elastic plate 102 by using the elastic plate 102, and then tighten it by using the locking bolt 103 to ensure the stability of the syringe 4.

[0026] A support plate 11 is movably arranged in the inner cavity of the fixing frame 3. Long grooves 12 are formed on both sides of the fixing frame 3. Bolting columns 13 are fixed on both sides of the support plate 11. The bolting columns 13 penetrate through the long grooves 12 and are threadedly connected with limit nuts 14. Through the cooperation of the bolting columns 13 and the limit nuts 14, it is convenient to adjust the height of the support plate 11 within the range of the long grooves 12.

[0027] It also includes a pressure sensor 15 installed inside the limiting groove 8. A display screen 16 is embedded outside the equipment base 1. The pressure sensor 15 is electrically connected to the display screen 16. Through the setting of the pressure sensor 15, when the mounting seat 7 pushes and pulls the syringe 4, it is convenient to directly detect the force acting on the syringe 4, and the pushing and pulling when the medicine passes through the injection needle 5 can be directly detected.

[0028] A collection bottle 17 is placed on the top of the support plate 11. The injection needle 5 penetrates into the inner cavity of the collection bottle 17. With the cooperation of the collection bottle 17, not only can the drug be stored, facilitating the syringe 4 to suck the liquid medicine through the injection needle 5, but also the liquid medicine discharged from the syringe 4 can be collected.

[0029] The lifting assembly 9 includes a threaded sleeve 91 fixedly embedded inside the support arm 6. A lifting screw rod 92 is threadedly connected to the inner cavity of the threaded sleeve 91. One end of the lifting screw rod 92 rotates in the inner cavity of the box body 2 through a bearing. A driving device for driving the lifting screw rod 92 is fixed in the inner cavity of the box body 2. A control switch 93 is installed on the top of the equipment base 1. By driving the driving device to drive the lifting screw rod 92 to rotate, and then the lifting screw rod 92 drives the support arm 6 to move up and down through the threaded sleeve 91, so as to lift and lower the mounting seat 7. The start and stop of the driving device can be controlled through the control switch 93.

[0030] During specific use, place the drug injection solution to be tested in the collection bottle 17, adjust the height of the support plate 11, and fix the support plate 11 by using the limit nut 14 and the bolt column 13. Then install the syringe 4 on the fixed frame 3, so that the ear plate of the syringe 4 is located between the fixed plate 101 and the elastic plate 102. Subsequently, tighten the elastic plate 102 by using the locking bolt 103 to fix the syringe 4. At the same time, the piston rod of the syringe 4 is clamped in the limit groove 8 on the mounting seat 7. Then insert the injection needle 5 into the collection bottle 17. Then press the control switch 93 to start the driving device. The driving device drives the lifting screw rod 92 to rotate, and then the lifting screw rod 92 drives the support arm 6 to move upward through the threaded sleeve 91. Use the support arm 6 to drive the mounting seat 7 to lift the piston rod of the syringe 4, and use the injection needle 5 to suck the drug in the collection bottle 17. The force for lifting the piston rod of the syringe 4 is detected by the pressure sensor 15 on the mounting seat 7 and displayed on the display screen 16.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drug injection needle penetration test device, characterized in that Including: Equipment base (1); A box body (2) and a fixing frame (3) are installed on the top of the equipment base (1). A syringe (4) is arranged on the top of the fixing frame (3) through a clamping member (10). One end of the syringe (4) penetrates into the inner cavity of the fixing frame (3) and is equipped with an injection needle (5). An arm (6) is movably arranged in the inner cavity of the box body (2). The arm (6) penetrates through the box body (2) and extends outwards. A mounting seat (7) is installed at the bottom of the arm (6). A limiting groove (8) is formed on the mounting seat (7). One end of the piston rod of the syringe (4) away from the injection needle (5) is clamped in the limiting groove (8). A lifting assembly (9) for moving the arm (6) up and down is arranged in the inner cavity of the box body (2).

2. The drug injection needle penetration test device according to claim 1, characterized in that: The clamping member (10) includes a fixing plate (101) fixed to the top of the fixing frame (3). An elastic plate (102) is fixed to the top of the fixing plate (101). The ear plate on the outer side of the syringe (4) is located between the fixing plate (101) and the elastic plate (102). A through hole is formed in the top of the elastic plate (102), and a locking bolt (103) is movably arranged in the inner cavity of the through hole. The locking bolt (103) penetrates through the through hole and is threadedly connected to the fixing plate (101).

3. The needle penetration test device for a pharmaceutical injection according to claim 1, characterized in that: A support plate (11) is movably arranged in the inner cavity of the fixing frame (3). Long grooves (12) are formed on both sides of the fixing frame (3). Bolt columns (13) are fixed to both sides of the support plate (11). The bolt columns (13) penetrate through the long grooves (12) and are threadedly connected with limiting nuts (14).

4. A drug injection needle penetration test device according to claim 1, characterized in that: It further includes a pressure sensor (15) installed inside the limiting groove (8). A display screen (16) is embedded on the outside of the equipment base (1). The pressure sensor (15) is electrically connected to the display screen (16).

5. The needle penetration test device for a pharmaceutical injection according to claim 3, wherein: A collection bottle (17) is placed on the top of the support plate (11). The injection needle (5) penetrates into the inner cavity of the collection bottle (17).

6. The needle penetration test device for a pharmaceutical injection according to claim 1, characterized in that: The lifting assembly (9) includes a threaded sleeve (91) fixedly embedded in the arm (6). A lifting screw rod (92) is threadedly connected to the inner cavity of the threaded sleeve (91). One end of the lifting screw rod (92) rotates in the inner cavity of the box body (2) through a bearing. A driving device for driving the lifting screw rod (92) is fixed in the inner cavity of the box body (2). A control switch (93) is installed on the top of the equipment base (1).

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