A medicine dispenser for pharmacology

Abstract

The application belongs to the technical field of medicine test sampling, and particularly relates to a medicine dispensing and sampling device for pharmacology, which comprises a handheld fixing cylinder and a handheld lifting cylinder which is slidably arranged outside the handheld fixing cylinder. An inner side of the handheld fixing cylinder is provided with a detachable sampling unit. An upper side of the handheld lifting cylinder is provided with a mainboard and a battery assembly. The device further comprises a connecting mechanism which is installed in the interior of the handheld lifting cylinder and connects the sampling unit with a moving end. A handheld weighing cylinder is arranged above the handheld lifting cylinder, and the mainboard and the battery assembly are fixed to the top of the handheld weighing cylinder. A suspension assembly is installed in the interior of the handheld weighing cylinder. The device can effectively correct the measurement error caused by wall hanging residues, realize high-precision sampling, reduce human operation deviation, make the sampling operation more convenient, ensure the accuracy of the weighing data, weaken the interference of the holding skew and reduce the operation difficulty.

Description

Technical Field

[0001] This invention belongs to the field of drug testing and sampling technology, and in particular relates to a dispensing device for pharmacology. Background Technology

[0002] In the process of pharmacological drug efficacy and quality testing, it is necessary to collect the drug solution to be tested. The dispensing device is responsible for quantitatively collecting the test drug solution, unifying the volume of each group of samples, ensuring uniform sampling specifications, and providing standardized test samples for subsequent physical and chemical property testing and pharmacological activity testing of the drug solution.

[0003] For example, a pharmacological dispensing device disclosed in patent publication number CN213749228U mainly uses a dispensing tube, needle, shell, threaded cylinder, limiting plate and rebound device to rotate the threaded cylinder and use the scale lines to move the limiting plate to a suitable position, thereby limiting the movement of the piston and thus effectively controlling the amount of drug dispensed.

[0004] However, in the actual sampling process, due to the strong adhesion of some drug solutions, they are prone to adhering to the outer wall of the pipette tip and the inner wall of the container, forming residual liquid on the wall. This leads to a certain deviation between the actual sampling amount and the required sampling amount. Moreover, it is difficult to accurately control the amount of drug by relying solely on the scale lines on the side wall of the container. At the same time, the sampling value is easily affected by the operating method and the angle of view, resulting in poor sampling accuracy of the drug solution to be tested, which in turn affects the accuracy of subsequent pharmacological test results. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a dispensing device for pharmacological purposes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pharmacological dispensing device, comprising a handheld fixing cylinder and a handheld lifting cylinder slidably disposed outside the handheld fixing cylinder, wherein a detachable sampling unit is provided on the inner side of the handheld fixing cylinder, and a main board and a battery assembly are provided on the top of the handheld lifting cylinder, and further comprising:

[0007] A connecting mechanism is installed inside the handheld lifting tube, and the handheld lifting tube is connected to the moving end of the sampling unit through the connecting mechanism;

[0008] A handheld weighing cylinder is positioned above the handheld lifting cylinder, and the main board and battery assembly are both fixed to the top of the handheld weighing cylinder. A suspension assembly is installed inside the handheld weighing cylinder, and a weighing sensor is installed through the suspension assembly. The detection end of the weighing sensor is fixedly connected to the top of the handheld lifting cylinder.

[0009] An infrared ranging probe is fixedly inserted into the top of the handheld lifting cylinder, and both the weighing sensor and the infrared ranging probe are electrically connected to the main board.

[0010] The correction prompt unit is installed inside the handheld fixed cylinder and below the infrared ranging probe.

[0011] Preferably, the sampling unit includes a sampling tube movably disposed inside the handheld fixing tube, the bottom of the sampling tube is provided with an aspiration head, a sampling piston is slidably connected inside the sampling tube, and a piston rod is fixed to the top of the sampling piston. A plurality of limiting posts are fixed to the inner side wall of the handheld fixing tube and abut against the top of the sampling tube.

[0012] Preferably, the connecting mechanism includes a square rod fixed to the inner side wall of the top of the handheld lifting tube. A square groove is provided inside the handheld fixing tube above the sampling tube. The lower end of the square rod slides through the top of the handheld fixing tube and extends into the interior of the square groove. A square connecting block matching the square groove is fixed to the lower end of the square rod. A stud is fixed to the bottom of the square connecting block. A threaded groove matching the stud is provided on the top of the piston rod. A limiting component is provided on the side wall of the square connecting block. The main board controls the limiting component to work according to the electrical signal fed back by the infrared ranging probe.

[0013] Preferably, the limiting component includes grooves formed on two opposite side walls of the square connecting block, an electromagnetic block is slidably connected inside the groove, and a return spring is fixed between the electromagnetic block and the bottom of the groove. Two iron bars corresponding to the positions of the electromagnetic blocks are fixedly inserted into the inner side wall of the handheld fixing cylinder. The main board controls the operation of the electromagnetic blocks according to the electrical signals fed back by the infrared ranging probe.

[0014] Preferably, the suspension assembly includes a protrusion fixed to the inner sidewall of the top of the handheld weighing cylinder, a first ball groove is provided at the bottom of the protrusion, and a connecting ball is rotatably provided inside the first ball groove. A suspension rod is fixed at the bottom of the connecting ball, an installation block is fixed at the bottom of the suspension rod, and a weighing sensor is fixed at the bottom of the installation block.

[0015] Preferably, the correction prompting unit includes a second ball groove at the top of the handheld fixing cylinder, and a positioning ball is rotatably provided inside the second ball groove. The positioning ball is positioned directly below the infrared ranging probe. A deviation reflector is fixed to the top of the positioning ball. An annular groove is provided on the outer wall of the handheld fixing cylinder. A T-shaped rod is fixed to the bottom of the positioning ball and is positioned inside the annular groove. The deviation reflector, the T-shaped rod, and the positioning ball together have a light-transmitting hole coaxial with the infrared ranging probe. A reflective positioning block is provided inside the annular groove below the T-shaped rod. A support assembly is installed on the groove wall of the annular groove, and the reflective positioning block abuts against the bottom of the T-shaped rod under the support of the support assembly.

[0016] Preferably, the support assembly includes a mounting cover fixed to the wall of the annular groove, and an elastic rubber pad is fixed between the mounting cover and the reflective positioning block. An iron column is fixed to the bottom of the reflective positioning block, and the iron column is slidably connected to the elastic rubber pad. The lower end of the iron column slides through the top of the mounting cover and extends to the inner side of the mounting cover. An electromagnetic column is fixed to the wall of the annular groove at the position inside the mounting cover, and the electromagnetic column is electrically connected to the main board.

[0017] Preferably, the outer side of the handheld weighing cylinder is provided with a grip sleeve, the inner side wall of the grip sleeve is fixed with a plurality of annularly distributed sliders, the outer side wall of the handheld weighing cylinder is provided with a groove matching the sliders, and a support spring is fixed between the sliders and the grooves, and the outer side wall of the handheld lifting cylinder is provided with an annular stepped groove that abuts against the bottom of the grip sleeve.

[0018] Preferably, a first counterweight column is fixed inside the annular groove, and a second counterweight column is fixed at the top of the handheld lifting tube.

[0019] Compared with existing technologies, the present invention has the following advantages:

[0020] 1. This invention, through the coordinated operation of a handheld fixed cylinder, a handheld lifting cylinder, a sampling unit, and a connecting mechanism, can extract samples of the liquid medicine. Furthermore, through the coordinated operation of a motherboard, a battery assembly, a handheld weighing cylinder, a suspension assembly, a weighing sensor, and an infrared ranging probe, it can calculate the measurement deviation caused by liquid medicine residue adhering to the wall based on a comprehensive measurement of the liquid medicine weight and liquid level. Based on this residue, it can conveniently and accurately measure the liquid medicine sample, ensuring the accuracy of the sampling.

[0021] 2. The present invention, through the connection mechanism and the limiting component inside the connection mechanism, can automatically stop the sampling of medicine when the set sampling amount is reached. This semi-automatic sampling design can ensure the accuracy of sampling, avoid the error caused by manual sampling operation, and ensure the ease of use of the whole device.

[0022] 3. By combining the suspension components and the correction and prompting unit, this invention can reduce the impact of workers holding the device at an angle on the weighing accuracy within a certain range, while ensuring vertical weighing and weighing accuracy. This reduces the difficulty of manual operation and improves the flexibility of the device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a dispensing device for pharmacology provided by the present invention;

[0024] Figure 2 This is a cross-sectional view of a dispensing device for pharmacology provided by the present invention.

[0025] Figure 3 This invention provides a pharmacological dispensing device. Figure 2 Enlarged view of the structure of section A;

[0026] Figure 4 This invention provides a pharmacological dispensing device. Figure 2 Enlarged view of the structure of section B;

[0027] Figure 5 This is a three-dimensional structural diagram of the handheld fixing cylinder of a pharmacological dispensing device provided by the present invention;

[0028] Figure 6 This is a three-dimensional structural schematic diagram of a handheld lifting tube for a pharmacological dispensing device provided by the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of a handheld weighing cylinder for a pharmacological dispensing device provided by the present invention;

[0030] Figure 8 This is a three-dimensional structural diagram of the sampling cylinder of a pharmacological dispensing device provided by the present invention.

[0031] In the diagram: 1. Handheld fixed cylinder; 2. Handheld lifting cylinder; 3. Sampling unit; 31. Sampling cylinder; 32. Suction head; 33. Sampling piston; 34. Piston rod; 35. Limiting post; 4. Main board; 5. Battery assembly; 6. Connecting mechanism; 61. Square rod; 62. Square groove; 63. Square connecting block; 64. Stud; 7. Handheld weighing cylinder; 8. Suspension assembly; 81. Protrusion; 82. Connecting ball; 83. Suspension rod; 84. Mounting block; 9. Weighing sensor; 10. Infrared ranging probe; 11. Correction lifting cylinder Display unit; 111, positioning ball; 112, offset reflector block; 113, annular groove; 114, T-shaped rod; 115, light-transmitting hole; 116, reflective positioning block; 12, limiting component; 121, groove; 122, electromagnetic block; 123, return spring; 124, iron bar; 13, support component; 131, mounting cover; 132, elastic rubber pad; 133, iron column; 134, electromagnetic column; 14, grip sleeve; 15, slider; 16, support spring; 17, first counterweight column; 18, second counterweight column. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] like Figures 1-8As shown, a pharmacological dispensing device includes a handheld fixing cylinder 1 and a handheld lifting cylinder 2 slidably disposed outside the handheld fixing cylinder 1. A detachable sampling unit 3 is provided inside the handheld fixing cylinder 1. A main board 4 and a battery assembly 5 are provided above the handheld lifting cylinder 2. The sampling unit 3 includes a sampling cylinder 31 movably disposed inside the handheld fixing cylinder 1. An aspiration head 32 is provided at the bottom of the sampling cylinder 31. A sampling piston 33 is slidably connected inside the sampling cylinder 31, and a piston rod 34 is fixed at the top of the sampling piston 33. Several limiting posts 35 are fixed on the inner wall of the handheld fixing cylinder 1, which abut against the top of the sampling cylinder 31. The sampling cylinder 31, aspiration head 32, sampling piston 33 and piston rod 34 are all disposable items. They need to be replaced in advance when extracting different drug solutions to avoid mixing. The limiting posts 35 can ensure that an air discharge gap is maintained at the top of the sampling cylinder 31.

[0034] The connecting mechanism 6 is installed inside the handheld lifting tube 2, and the handheld lifting tube 2 is connected to the moving end of the sampling unit 3 through the connecting mechanism 6. The connecting mechanism 6 includes a square rod 61 fixed to the inner side wall of the top of the handheld lifting tube 2. A square groove 62 is opened inside the handheld fixed tube 1 at a position above the sampling tube 31. The lower end of the square rod 61 slides through the top of the handheld fixed tube 1 and extends into the interior of the square groove 62. A square connecting block 63 matching the square groove 62 is fixed to the lower end of the square rod 61. A stud 64 is fixed to the bottom of the square connecting block 63. A threaded groove matching the stud 64 is opened on the top of the piston rod 34. A limiting component 12 is provided on the side wall of the square connecting block 63, and the main board 4 is based on infrared ranging. The electrical signal fed back by the probe 10 controls the operation of the limiting component 12. The limiting component 12 includes grooves 121 formed on the two opposite side walls of the square connecting block 63. An electromagnetic block 122 is slidably connected inside the groove 121, and a return spring 123 is fixed between the electromagnetic block 122 and the bottom of the groove 121. The return spring 123 is made of non-magnetic material. Two iron bars 124 corresponding to the positions of the electromagnetic block 122 are fixedly inserted into the inner side wall of the handheld fixing cylinder 1. The main board 4 controls the operation of the electromagnetic block 122 according to the electrical signal fed back by the infrared ranging probe 10. After the electromagnetic block 122 is energized, it will be stably attracted to the iron bars 124. Usually, a force of 20N is required to force the electromagnetic block 122 and the iron bars 124 to separate.

[0035] The handheld weighing cylinder 7 is positioned above the handheld lifting cylinder 2, and the main board 4 and the battery assembly 5 are both fixed to the top of the handheld weighing cylinder 7. A suspension assembly 8 is installed inside the handheld weighing cylinder 7, and a weighing sensor 9 is installed through the suspension assembly 8. The detection end of the weighing sensor 9 is fixedly connected to the top of the handheld lifting cylinder 2. The suspension assembly 8 includes a protrusion 81 fixed to the inner side wall of the top of the handheld weighing cylinder 7. A first ball groove is opened at the bottom of the protrusion 81, and a connecting ball 82 is rotatably provided inside the first ball groove. A suspension rod 83 is fixed to the bottom of the connecting ball 82, and a mounting block 84 is fixed to the bottom of the suspension rod 83. The weighing sensor 9 is fixed to the bottom of the mounting block 84. When the tilt angle of the handheld weighing cylinder 7 is greater than 15°, the side wall of the handheld weighing cylinder 7 will abut against the side wall of the infrared ranging probe 10, which can prevent the tilt angle of the handheld weighing cylinder 7 from being too large and avoid damage to the cables between the main board 4 and the controlled components such as the electromagnetic block 122.

[0036] The infrared ranging probe 10 is fixedly inserted into the top of the handheld lifting cylinder 2. Both the weighing sensor 9 and the infrared ranging probe 10 are electrically connected to the main board 4. The deviation correction indicator unit 11 is installed inside the handheld fixed cylinder 1 and below the infrared ranging probe 10. The deviation correction indicator unit 11 includes a second ball groove on the top of the handheld fixed cylinder 1, and a positioning ball 111 is rotatably mounted inside the second ball groove. The positioning ball 111 is positioned directly below the infrared ranging probe 10. A deviation reflector 112 is fixed to the top of the positioning ball 111. An annular groove 113 is formed on the outer wall of the handheld fixed cylinder 1. A T-shaped rod 114 is fixed to the bottom of the positioning ball 111, and the T-shaped rod 114 is positioned inside the annular groove 113. The reflective block 112, T-shaped rod 114, and positioning ball 111 are all provided with a light-transmitting hole 115 coaxial with the infrared ranging probe 10. A reflective positioning block 116 is provided inside the annular groove 113 below the T-shaped rod 114. A support assembly 13 is installed on the groove wall of the annular groove 113, and the reflective positioning block 116 abuts against the bottom of the T-shaped rod 114 under the support of the support assembly 13. During weighing, the support of the support assembly 13 on the reflective positioning block 116 is released, so that the reflective positioning block 116 is separated from the T-shaped rod 114. Under the action of the T-shaped rod 114, the positioning ball 111 has a larger swing space than the connecting ball 82 and the suspension rod 83, so as to remind the personnel when the weighing is tilted.

[0037] The support assembly 13 includes a mounting cover 131 fixed to the wall of the annular groove 113, and an elastic rubber pad 132 fixed between the mounting cover 131 and the reflective positioning block 116. An iron column 133 is fixed to the bottom of the reflective positioning block 116, and the iron column 133 is slidably connected to the elastic rubber pad 132. The lower end of the iron column 133 slides through the top of the mounting cover 131 and extends to the inner side of the mounting cover 131. An electromagnetic column 134 is fixed to the wall of the annular groove 113 at the position inside the mounting cover 131, and the electromagnetic column 134 is electrically connected to the main board 4. Under the action of the elastic rubber pad 132, the reflective positioning block 116 abuts against the T-shaped rod 114 to ensure the stability of the positioning ball 111, thereby ensuring the accurate detection of the sampling displacement by the infrared ranging probe 10.

[0038] The outer side of the handheld weighing cylinder 7 is fitted with a grip sleeve 14. The inner side wall of the grip sleeve 14 is fixed with multiple annularly distributed sliders 15. The outer side wall of the handheld weighing cylinder 7 is provided with a groove that matches the sliders 15. A support spring 16 is fixed between the sliders 15 and the groove. The outer side wall of the handheld lifting cylinder 2 is provided with an annular stepped groove that abuts against the bottom of the grip sleeve 14. When not weighing, the grip sleeve 14 abuts against the annular stepped groove, which can ensure the stability of the handheld weighing cylinder 7 and prevent it from shaking randomly.

[0039] A first counterweight column 17 is fixed inside the annular groove 113, and a second counterweight column 18 is fixed on the top of the handheld lifting tube 2. The first counterweight column 17 is used to balance the weight of each component of the correction and prompting unit 11, and the second counterweight column 18 can balance the weight of the infrared ranging probe 10. By balancing the weights of the first counterweight column 17 and the second counterweight column 18, the uniformity of the weight distribution at the bottom of the weighing sensor 9 can be improved, which is conducive to improving the weighing accuracy.

[0040] The operating principle of this invention is explained as follows: Taking a 10mL sampling cylinder 31 as an example, its effective stroke is 100mm. For every 10mm movement of the sampling piston 33, the corresponding volume is 1mL. The piston rod 34 inside the disposable sampling cylinder 31 is pulled upwards and aligned with the stud 64, connecting the piston rod 34 to the square connecting block 63. Then, the sampling cylinder 31 is pressed into the handheld fixing cylinder 1, abutting against the limiting post 35. After preparation, the handheld grip sleeve 14 is held, and the handheld fixing cylinder 1 is released. At this time... Under the influence of gravity, the grip sleeve 14 and the handheld lifting cylinder 2 are relatively displaced, causing the grip sleeve 14 to separate from the annular stepped groove on the side wall of the handheld lifting cylinder 2. At this time, the weight of the components below the weighing sensor 9, such as the handheld lifting cylinder 2, the handheld fixing cylinder 1, and the sampling cylinder 31, is all applied to the detection end of the weighing sensor 9. By pressing the zeroing button on the operation panel on the outer wall of the handheld lifting cylinder 2, the weighing sensor 9 can be tare-cleared and zeroed, thus offsetting the readings generated by the weight of the various components below, and calibrating the initial zero point for subsequent drug liquid weight detection.

[0041] Then press the pre-test button and hold the handheld fixed tube 1 again. Move the sampling tube 31 above the test liquid so that the suction head 32 contacts the test liquid. Next, hold the handheld lifting tube 2 and move it upward. At this time, the handheld lifting tube 2 and the handheld fixed tube 1 will have relative displacement. The handheld lifting tube 2 will drive the sampling piston 33 upward through the square rod 61, square connecting block 63, stud 64 and piston rod 34. At this time, a negative pressure is generated inside the sampling tube 31, and the liquid is drawn into the sampling tube through the suction head 32. Inside 31, as the handheld lifting tube 2 moves upward, the main board 4 controls the infrared ranging probe 10 to operate. At this time, the reflective positioning block 116, under the action of the elastic rubber pad 132, abuts against the bottom of the T-shaped rod 114. Therefore, the light beam emitted by the infrared ranging probe 10 passes through the light-transmitting hole 115 and illuminates the reflective positioning block 116. The reflective positioning block 116 reflects the light beam through the light-transmitting hole 115 to the receiving end of the infrared ranging probe 10. By calculating the time required for the emitted light beam to reach the received light beam, the infrared ranging probe can be measured. The distance between the infrared ranging probe 10 and the reflective positioning block 116, i.e., the relative displacement distance between the handheld lifting tube 2 and the handheld fixed tube 1, is such that when the infrared ranging probe 10 detects a displacement of 50mm, the corresponding amount of medicine to be drawn is 5mL (including the medicine in the suction head 32). The main board 4 will immediately control the electromagnetic block 122 to work, and the electromagnetic block 122 will immediately be attracted and fixed to the iron bar 124 on the same side. At this time, the handheld lifting tube 2 cannot be pulled up any further. Press the unlock button on the operation panel, and the electromagnetic block 122 will be de-energized. Then, the hand-held lifting cylinder 2 is moved back to allow the liquid medicine in the sampling cylinder 31 to be discharged. After the hand-held lifting cylinder 2 is reset, the aforementioned weighing steps are repeated to measure the weight at this time. Since the liquid medicine is adhesive, some of the liquid medicine adheres to the inner wall of the sampling cylinder 31 to form residual liquid on the wall. Therefore, the weight measured this time will be higher than the weight at the initial tare zeroing. This weight represents the amount of residual liquid medicine on the wall in 5 mL. Thus, the amount of residual liquid medicine on the wall corresponding to 1 mL can be calculated, as well as the amount of residual liquid medicine medicine corresponding to 1 mm of movement of the sampling piston 33.

[0042] Input the target sampling amount through the operation panel. The main board 4 retrieves the previously calibrated unit residual parameters, first calculates the total amount of residue on the wall corresponding to the sampling amount, and then calculates the compensation displacement distance corresponding to the residual amount by combining the correspondence between the movement of the sampling piston 33 and the residual amount. The compensation displacement distance is added to the standard suction displacement distance corresponding to the target sampling amount to finally obtain the trigger displacement amount of the infrared ranging probe 10. Following the above steps, the liquid is extracted again. When the infrared ranging probe 10 detects that the displacement amount reaches the set trigger displacement amount, the main board 4 will control the electromagnetic block 122 to work again to complete the sampling of the liquid.

[0043] During weighing, because the load cell 9 is connected to the handheld weighing cylinder 7 via the mounting block 84, suspension rod 83, connecting ball 82, and protrusion 81, a slight tilt occurs when the person holding the handheld weighing cylinder 7. Under the action of gravity, the connecting ball 82 automatically rotates, keeping the load cell 9 vertical for weighing, ensuring weighing accuracy. Secondly, during weighing, whether the zeroing button or the pre-check button is pressed, the main board 4 controls the electromagnetic column 134 to work. The electromagnetic column 134, when energized, generates a magnetic attraction force on the iron column 133. At this time, the iron column 133 drives the reflective positioning block 116 downward, causing the reflective positioning block 116 to detach from the T-shaped rod 114. During the weighing process, when the tilt angle is within 15°, the connecting ball 82 ensures that the load cell 9 remains vertical for weighing. However, when the tilt angle is greater than 15°, the side wall of the handheld weighing cylinder 7 will come into contact with the infrared ranging probe 10. The side walls abutting each other causes the weighing sensor 9 to tilt as well. At this time, the hand-held lifting tube 2 will cause the infrared ranging probe 10 to tilt synchronously, while the positioning ball 111 continues to remain vertical under the gravity of the T-shaped rod 114. Therefore, the beam emitted by the infrared ranging probe 10 will be misaligned with the light-transmitting hole 115 and will illuminate the offset reflector 112. At this time, the infrared ranging probe 10 will detect the distance of the offset reflector 112 and send the corresponding electrical signal back to the main board 4. The main board 4 will immediately issue a voice prompt to remind the person to adjust the grip angle of the grip sleeve 14 to avoid excessive tilting and affecting the weighing accuracy. After the weighing is completed, the main board 4 controls the electromagnetic column 134 to be de-energized. Under the action of the elastic rubber pad 132, the reflective positioning block 116 abuts against the T-shaped rod 114 again to ensure the stability of the positioning ball 111, thereby ensuring the accurate detection of the sampling displacement by the infrared ranging probe 10.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pharmacological medicine dispensing device, comprising a hand-held fixed cylinder (1) and a hand-held lifting cylinder (2) slidingly arranged outside the hand-held fixed cylinder (1), the inner side of the hand-held fixed cylinder (1) is provided with a detachable sampling unit (3), the upper side of the hand-held lifting cylinder (2) is provided with a main board (4) and a battery assembly (5), characterized in that, Also includes: A connecting mechanism (6) is installed inside the handheld lifting tube (2), and the handheld lifting tube (2) is connected to the moving end of the sampling unit (3) through the connecting mechanism (6); A handheld weighing cylinder (7) is positioned above the handheld lifting cylinder (2), and the main board (4) and the battery assembly (5) are both fixed on the top of the handheld weighing cylinder (7). A suspension assembly (8) is installed inside the handheld weighing cylinder (7), and a weighing sensor (9) is installed through the suspension assembly (8). The detection end of the weighing sensor (9) is fixedly connected to the top of the handheld lifting cylinder (2). An infrared ranging probe (10) is fixedly inserted into the top of the handheld lifting tube (2), and both the weighing sensor (9) and the infrared ranging probe (10) are electrically connected to the main board (4). The correction prompt unit (11) is installed inside the handheld fixed tube (1) and below the infrared ranging probe (10).

2. The pharmacological dispensing device according to claim 1, characterized in that, The sampling unit (3) includes a sampling tube (31) movably disposed inside the handheld fixed tube (1). The bottom of the sampling tube (31) is provided with an aspiration head (32). The sampling tube (31) is slidably connected to the inside of the sampling tube (31), and a piston rod (34) is fixed to the top of the sampling piston (33). Several limiting posts (35) that abut against the top of the sampling tube (31) are fixed to the inner wall of the handheld fixed tube (1).

3. A dispensing device for pharmacological applications according to claim 2, characterized in that, The connecting mechanism (6) includes a square rod (61) fixed to the inner side wall of the top of the handheld lifting tube (2). The inside of the handheld fixing tube (1) is provided with a square groove (62) located above the sampling tube (31). The lower end of the square rod (61) slides through the top of the handheld fixing tube (1) and extends into the inside of the square groove (62). The lower end of the square rod (61) is fixed with a square connecting block (63) that matches the square groove (62). The bottom of the square connecting block (63) is fixed with a stud (64). The top of the piston rod (34) is provided with a threaded groove that matches the stud (64). The side wall of the square connecting block (63) is provided with a limiting component (12). The main board (4) controls the limiting component (12) to work according to the electrical signal fed back by the infrared ranging probe (10).

4. A dispensing device for pharmacological applications according to claim 3, characterized in that, The limiting component (12) includes a groove (121) formed on two opposite side walls of the square connecting block (63). An electromagnetic block (122) is slidably connected inside the groove (121), and a reset spring (123) is fixed between the electromagnetic block (122) and the bottom of the groove (121). Two iron bars (124) corresponding to the position of the electromagnetic block (122) are fixedly inserted into the inner side wall of the handheld fixing cylinder (1). The main board (4) controls the electromagnetic block (122) to work according to the electrical signal fed back by the infrared ranging probe (10).

5. A dispensing device for pharmacological applications according to claim 1, characterized in that, The suspension assembly (8) includes a protrusion (81) fixed to the inner side wall of the top of the handheld weighing cylinder (7). The bottom of the protrusion (81) is provided with a first ball groove, and a connecting ball (82) is rotatably provided inside the first ball groove. A suspension rod (83) is fixed to the bottom of the connecting ball (82), and a mounting block (84) is fixed to the bottom of the suspension rod (83). The weighing sensor (9) is fixed to the bottom of the mounting block (84).

6. A dispensing device for pharmacological applications according to claim 1, characterized in that, The correction prompting unit (11) includes a second ball groove on the top of the handheld fixing cylinder (1), and a positioning ball (111) is rotatably provided inside the second ball groove. The positioning ball (111) is located directly below the infrared ranging probe (10). A deflection reflector (112) is fixed on the top of the positioning ball (111). An annular groove (113) is provided on the outer wall of the handheld fixing cylinder (1). A T-shaped rod (114) is fixed on the bottom of the positioning ball (111), and the T-shaped rod (114) is located in the annular groove. Inside the groove (113), the offset reflector (112), the T-shaped rod (114) and the positioning ball (111) are provided with a light-transmitting hole (115) coaxial with the infrared ranging probe (10). Inside the annular groove (113), a reflective positioning block (116) is provided below the T-shaped rod (114). The groove wall of the annular groove (113) is equipped with a support assembly (13), and the reflective positioning block (116) abuts against the bottom of the T-shaped rod (114) under the support of the support assembly (13).

7. A dispensing device for pharmacological use according to claim 6, characterized in that, The support assembly (13) includes a mounting cover (131) fixed to the wall of the annular groove (113), and an elastic rubber pad (132) is fixed between the mounting cover (131) and the reflective positioning block (116). An iron column (133) is fixed to the bottom of the reflective positioning block (116), and the iron column (133) is slidably connected to the elastic rubber pad (132). The lower end of the iron column (133) slides through the top of the mounting cover (131) and extends to the inner side of the mounting cover (131). An electromagnetic column (134) is fixed to the wall of the annular groove (113) at the position inside the mounting cover (131), and the electromagnetic column (134) is electrically connected to the main board (4).

8. A dispensing device for pharmacological applications according to claim 1, characterized in that, The handheld weighing cylinder (7) is slidably fitted with a grip sleeve (14). The inner sidewall of the grip sleeve (14) is fixed with a plurality of annularly distributed sliders (15). The outer sidewall of the handheld weighing cylinder (7) is provided with a groove that matches the sliders (15). A support spring (16) is fixed between the sliders (15) and the groove. The outer sidewall of the handheld lifting cylinder (2) is provided with an annular stepped groove that abuts against the bottom of the grip sleeve (14).

9. A dispensing device for pharmacological use according to claim 6, characterized in that, The annular groove (113) is fixed with a first counterweight column (17), and the top of the handheld lifting tube (2) is fixed with a second counterweight column (18).

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