Tablet hardness detector

Abstract

The utility model relates to the technical field of mechanical engineering, and discloses a tablet hardness detector which comprises a detection shell, the right side of the inner wall of the detection shell is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a rotating column, and the left end and the right end of the outer side of the rotating column are both fixedly connected with pinions. The left side and the right side of the inner wall of the detection shell are both rotationally connected with connecting cylinders, the sides, away from each other, of the two connecting cylinders are both fixedly connected with nut gears, the outer walls of the two nut gears are both connected with the small gear through chains, and the inner walls of the two nut gears are both in threaded connection with screw rods. According to the tablet feeding device, the servo motor is started, the rotating column drives the small gear to rotate synchronously, the nut gear and the connecting cylinder are made to rotate through connection of the chain, the miniature air bag is driven to be close to the tablets, at the moment, the compressed air storage tank inflates the air bag, and the air bag can accurately clamp the tablets of different sizes by means of the soft material of the air bag.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a tablet hardness tester. Background Technology

[0002] Tablets are solid dosage forms made by crushing, mixing, granulating, and compressing drugs and excipients. They are round or irregular in shape. As a common drug, the quality of tablets is related to the treatment effect and health safety of patients. Tablets that are too hard disintegrate slowly, affecting drug release and absorption, while tablets that are too soft will crack and wear. For this reason, tablet hardness testers have been developed.

[0003] A tablet hardness tester is a quality control device used in pharmaceutical manufacturing to assess the mechanical strength of tablets. Its core function is to measure the critical value of tablet breakage under pressure, providing corresponding physical parameters for drug production. The device consists of sensors, a clamping mechanism, and a data processing mechanism, and the measurement results are directly related to the disintegration time and dissolution characteristics of tablets.

[0004] Although tablet hardness testers offer convenience, the fixed shape and size of the clamping mechanism make it difficult to adapt to tablets of different shapes, sizes, and surface characteristics. For irregularly shaped tablets or tablets with special surface textures, uniform clamping cannot be achieved. The existing solution is to use a modular clamping head, which is assembled according to the tablet shape. Although the modular clamping head can adapt to tablets of different shapes, the replacement and adjustment process requires manual operation, which is cumbersome. Moreover, the adjustment mechanism wears down due to long-term use, affecting the accuracy and reliability of the adjustment. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a tablet hardness tester, which aims to improve the problems of cumbersome operation of the combined clamping head and easy wear of the adjustment mechanism in the prior art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a tablet hardness tester, comprising a testing shell, a servo motor fixedly connected to the right side of the inner wall of the testing shell, a rotating column fixedly connected to the output end of the servo motor, pinions fixedly connected to the left and right ends of the outer side of the rotating column, connecting cylinders rotatably connected to the left and right sides of the inner wall of the testing shell, nut gears fixedly connected to the opposite sides of the two connecting cylinders, the outer walls of the two nut gears and the pinions connected by chains, and screws threadedly connected to the inner walls of the two nut gears. Each screw has a sliding column fixedly connected to its opposite side. Each pair of sliding columns has a micro air bladder fixedly connected to its adjacent side. Each pair of micro air bladders has multiple pressure sensors fixedly connected to its adjacent side. Each pair of micro air bladders has a micro air valve fixedly connected to its outer top. Each inner wall of the detection shell has a compressed air tank fixedly connected to its left and right sides. Each of the two compressed air tanks has a vent pipe fixedly connected to its front side. A collection shell is slidably connected to the front side of the detection shell. A cooling mechanism is provided on the front side of the detection shell for rapid cooling of the device.

[0007] As a further description of the above technical solution:

[0008] The cooling mechanism includes two cooling fans, the bottoms of which are fixedly connected to the bottom of the inner wall of the detection housing. Two air diffusers are fixedly connected to the bottom of the inner wall of the detection housing. Two heat dissipation slots are opened on the front side of the detection housing. Dust filters are slidably connected to the inner walls of the two heat dissipation slots. Two magnetic strips are fixedly connected to the rear sides of the two dust filters. Two magnetic strips are fixedly connected to the rear sides of the inner walls of the two heat dissipation slots.

[0009] As a further description of the above technical solution:

[0010] Each of the two compressed air tanks is fixedly connected to a pressure display on the side furthest from each other, and each of the two compressed air tanks is fixedly connected to an alarm on its top.

[0011] As a further description of the above technical solution:

[0012] The front side of the detection shell has two mounting slots, and the rear side of the collection shell is fixedly connected to two mounting posts.

[0013] As a further description of the above technical solution:

[0014] The detection shell is rotatably connected to both the left and right sides with maintenance doors, and each of the two maintenance doors is rotatably connected to a handle on the side furthest from each other.

[0015] As a further description of the above technical solution:

[0016] The bottom of each detection shell is fixedly connected with multiple rubber pads, and the bottom ends of the multiple rubber pads are all frosted.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the detection shell is fixedly connected to both the left and right sides with sealing rings, and both sealing rings adopt an annular design.

[0019] As a further description of the above technical solution:

[0020] A control panel is fixedly connected to the top front side of the detection housing. The control panel is electrically connected to the cooling fan, servo motor, pressure sensor, compressed air tank, air pressure display and alarm.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by starting the servo motor, the rotating column is rotated, which in turn causes the two small gears to rotate synchronously. Since the nut gear and the small gear are connected by a chain, the nut gear and the corresponding connecting cylinder rotate, causing the position of the two micro airbags to change. When the airbags are close to the tablet, the micro airbags are inflated by the compressed air tank, so that the two micro airbags clamp the tablet. Moreover, the soft material of the airbags can clamp tablets of different sizes with accurate precision.

[0023] 2. In this utility model, by sliding the two dust filters into the corresponding heat dissipation slots, the magnetic strips one and two generate a magnetic attraction effect, which can both allow air circulation and increase the stability of the dust filters. The cooling fan is activated to accelerate the air circulation speed of the heat dissipation slots, and the air diffuser can increase the air diffusion area and improve the heat dissipation efficiency. Attached Figure Description

[0024] Figure 1 This is a perspective view of a tablet hardness tester proposed in this utility model;

[0025] Figure 2 This is a cross-sectional view of the testing shell of a tablet hardness tester proposed in this utility model.

[0026] Figure 3 This is a cross-sectional view of the nut gear of a tablet hardness tester proposed in this utility model.

[0027] Figure 4 This is a schematic diagram of the pressure sensor of a tablet hardness tester proposed in this utility model.

[0028] Figure 5 This is an exploded view of the dust filter of a tablet hardness tester proposed in this utility model.

[0029] Legend:

[0030] 1. Detection housing; 2. Cooling mechanism; 201. Cooling fan; 202. Air diffuser; 203. Heat dissipation slot; 204. Dust filter; 205. Magnetic strip one; 206. Magnetic strip two; 3. Servo motor; 4. Rotating column; 5. Pinion gear; 6. Screw; 7. Nut gear; 8. Connecting cylinder; 9. Chain; 10. Sliding column; 11. Miniature airbag; 12. Pressure sensor; 13. Compressed air tank; 14. Miniature air valve; 15. Vent pipe; 16. Collection housing; 17. Rubber pad; 18. Air pressure display; 19. Alarm; 20. Mounting slot; 21. Mounting column; 22. Control panel; 23. Inspection door; 24. Handle; 25. Sealing ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a tablet hardness tester, comprising a testing shell 1. A servo motor 3 is fixedly connected to the right side of the inner wall of the testing shell 1, providing power for the movement of a compressed air tank 13. A rotating column 4 is fixedly connected to the output end of the servo motor 3. The left end of the rotating column 4 is rotatably connected to the left side of the inner wall of the testing shell 1. Small gears 5 are fixedly connected to the left and right ends of the outer side of the rotating column 4, transmitting power. Connecting cylinders 8 are rotatably connected to the left and right sides of the inner wall of the testing shell 1, allowing the nut gear 7 to maintain its stable position while rotating. Nut gears 7 are fixedly connected to the opposite sides of the two connecting cylinders 8, converting their rotational force into the force for the left and right movement of the screw 6. The outer walls of the two nut gears 7 and the small gears 5 are connected by chains 9. Screws 6 are threadedly connected to the inner walls of the two nut gears 7. Sliding columns 10 are fixedly connected to the opposite sides of the two screws 6, penetrating through... On the inner wall of the detection shell 1, two adjacent sides of the sliding columns 10 are fixedly connected to micro airbags 11, which clamp the tablets. Multiple pressure sensors 12 are fixedly connected to the adjacent sides of the two micro airbags 11. The pressure sensors 12 are used to detect the pressure at different positions on the contact surface between the micro airbags 11 and the tablets. Micro air valves 14 are fixedly connected to the outer top of the two micro airbags 11, which are used to quickly inflate and deflate the micro airbags 11. Compressed air tanks 13 are fixedly connected to the left and right sides of the inner wall of the detection shell 1. Compressed air tanks 13 are used to store compressed air. Air pipes 15 are fixedly connected to the front of the two compressed air tanks 13. The other end of the air pipes 15 is connected to the corresponding micro air valves 14 for supplying compressed air. A collection shell 16 is slidably connected to the front of the detection shell 1. The collection shell 16 is used to collect crushed tablets. A cooling mechanism 2 is provided on the front of the detection shell 1. The cooling mechanism 2 is used to quickly cool the inside of the device.

[0033] Specifically, the tablet to be tested is placed in a suitable position between the two micro-airbags 11. The presence of sufficient compressed air in the compressed air tank 13 is checked. The servo motor 3 is started, and its output drives the rotating column 4 to rotate. The pinions 5 at the left and right ends of the rotating column 4 rotate synchronously. The pinions 5 drive the nut gear 7 to rotate via the chain 9. Since the nut gear 7 is threadedly connected to the screw 6, the rotation of the nut gear 7 causes the screw 6 to move left and right, thereby moving the sliding column 10 and the micro-airbags 11 towards the center. When the micro-airbags 11 contact the tablet, the compressed air in the compressed air tank 13 is allowed to pass through the micro-air valve 14. The trachea 15 enters the micro-airbag 11, causing the micro-airbag 11 to inflate and grip the tablet. The pressure sensor 12 detects the pressure at different positions on the contact surface between the micro-airbag 11 and the tablet in real time and transmits the pressure signal to the control panel 22. As the pressure of the micro-airbag 11 on the tablet gradually increases, when the tablet reaches the maximum pressure it can withstand and is crushed, the hardness value of the tablet is obtained. After the tablet is crushed, the servo motor 3 is turned off, causing the micro-airbag 11 to stop moving. The compressed air in the micro-airbag 11 is released through the micro-air valve 14, and the micro-airbag 11 contracts, pouring the crushed tablet into the collection shell 16 for subsequent processing.

[0034] Reference Figure 1 , Figure 2 and Figure 5 The cooling mechanism 2 includes two cooling fans 201, which are used to accelerate the airflow speed inside the detection housing 1. The bottom of each cooling fan 201 is fixedly connected to the bottom of the inner wall of the detection housing 1. Two air diffusers 202 are fixedly connected to the bottom of the inner wall of the detection housing 1, which are used to increase the air diffusion area. Two heat dissipation slots 203 are opened on the front side of the detection housing 1, which provide space for the inflow of cold air from the outside. Dust filters 204 are slidably connected to the inner wall of each heat dissipation slot 203, which are used to prevent dust in the air from entering the device. Two magnetic strips 205 are fixedly connected to the rear side of each dust filter 204, and two magnetic strips 206 are fixedly connected to the rear side of the inner wall of each heat dissipation slot 203. The two magnetic strips 205 are magnetically connected to the corresponding magnetic strips 206, which can increase the stability of the dust filter 204 and facilitate the replacement and cleaning of the dust filter 204.

[0035] Specifically, the tablet hardness tester is turned on, and the cooling fans 201 are activated simultaneously. The two cooling fans 201 accelerate the airflow within the testing housing 1. After being accelerated by the cooling fans 201, the air flows towards the air diffuser 202. When the drawn-in air reaches the air diffuser 202, the diffusion area increases, allowing the air to be more evenly distributed within the testing housing 1. This more effectively removes the heat generated by the friction between the servo motor 3 and multiple components within the testing housing 1. The hot air is then exhausted to the outside of the testing housing 1 through the heat dissipation slot 203, while cool air from the outside is simultaneously cooled by the heat dissipation slot. The slot 203 enters the detection housing 1, forming an air exchange and realizing heat dissipation inside the detection housing 1. During the air exchange process, the dust filter 204 can block impurities in the air from entering the interior of the detection housing 1, protecting the electronic components and mechanical parts inside the detection housing 1 from dust contamination, ensuring the normal operation and detection accuracy of the detector. When there is too much dust on the surface of the dust filter 204, the magnetic connection between the first magnetic strip 205 and the second magnetic strip 206 can be broken by gently applying force, so that the dust filter 204 can be replaced or washed, increasing the convenience of dust filter 204 maintenance.

[0036] Reference Figure 1 , Figure 2 and Figure 3 Two compressed air storage tanks 13 are each fixedly connected to a pressure display 18 on the opposite side. The pressure display 18 is used to detect the compressed air content in the compressed air storage tank 13. An alarm 19 is fixedly connected to the top of each of the two compressed air storage tanks 13. When the pressure display 18 is low, the alarm 19 can remind the staff to replace it. Two mounting slots 20 are opened on the front side of the detection shell 1, and two mounting posts 21 are fixedly connected to the rear side of the collection shell 16. The mounting posts 21 are slidably connected to the mounting slots 20, facilitating the replacement of the collection shell 16. Inspection doors 23 are rotatably connected to the left and right sides of the detection shell 1, allowing for the inspection of the internal components of the detection shell 1. The two inspection doors 23 are rotatably connected on the opposite sides. A handle 24 is provided to facilitate the opening of the inspection door 23. Multiple rubber pads 17 are fixedly connected to the bottom of the detection housing 1. The bottom ends of the multiple rubber pads 17 are all frosted. The multiple rubber pads 17 can increase the friction between the device and the ground. Sealing rings 25 are fixedly connected to the left and right sides of the inner wall of the detection housing 1. Both sealing rings 25 adopt an annular design. The inner walls of the two sealing rings 25 are slidably connected to the sliding column 10 to prevent external impurities from entering the device when the sliding column 10 moves. A control panel 22 is fixedly connected to the top front side of the detection housing 1. The control panel 22 is electrically connected to the cooling fan 201, servo motor 3, pressure sensor 12, compressed air tank 13, air pressure display 18 and alarm 19 respectively.

[0037] Specifically, before starting the instrument, check the value on the pressure display 18. If the value displayed on the pressure display 18 is too low, the alarm 19 will sound. At this time, the compressed air tank 13 should be replaced in time to ensure that the micro airbag 11 has enough compressed air for inflation during subsequent testing. Ensure that the collection shell 16 is installed on the front side of the detection shell 1. When the collection shell 16 is full or damaged, slide the mounting column 21 along the mounting groove 20 to remove the collection shell 16 for replacement or cleaning. The rubber pad 17 at the bottom of the detection shell 1 can effectively increase the friction between the device and the ground to prevent the device from moving during use. After the test is completed, pour the crushed tablets into the collection shell 16 for subsequent processing. When it is necessary to repair the internal components of the detection shell 1, open the maintenance doors 23 on the left and right sides of the detection shell 1 by turning the handle 24 to inspect, clean or replace the internal servo motor 3, nut gear 7 and chain 9. After completion, close the maintenance door 23.

[0038] Working principle: The servo motor 3 serves as the power source, driving the rotating column 4 to rotate. The two small gears 5 rotate synchronously with the rotating column 4, transmitting power to the nut gear 7 via the chain 9. This causes the screw 6 to move left and right under the drive of the nut gear 7, moving the sliding column 10 and the micro-airbag 11 towards the center. This achieves initial positioning and clamping of the tablet placed between the two micro-airbags 11, converting the rotational motion of the servo motor 3 into the linear motion of the micro-airbags 11, providing power transmission for clamping and detection. When the micro-airbags 11 contact the tablet, compressed air stored in the compressed air tank 13 is released through... The air tube 15 enters the micro-airbag 11, and the pressure generated by the expansion of the micro-airbag 11 clamps the tablet. After the test is completed, the micro-air valve 14 is controlled again to release the compressed air in the micro-airbag 11, so that the crushed tablet can be removed and the next test can be carried out. This achieves flexible control of the clamping force of the micro-airbag 11, which has better adaptability and buffering effect, and avoids excessive damage to the tablet. The pressure sensor 12 monitors the pressure at different positions of the contact surface between the micro-airbag 11 and the tablet in real time, ensuring that the staff can accurately measure the hardness of the tablet and provide data support for drug quality control.

[0039] Furthermore, the cooling fan 201, acting as a power source, accelerates the airflow within the detection housing 1, creating a directional airflow that rapidly circulates the air within the housing. As the air accelerates after passing through the cooling fan 201 and reaches the air diffuser 202, the diffuser increases the air diffusion area, ensuring a more even distribution of air within the detection housing 1 and maximizing contact with the heat-generating components inside the instrument. Simultaneously, relatively cooler outside air enters the detection housing 1 through the heat dissipation slots 203, forming a continuous air exchange cycle that effectively removes heat from the detection housing 1, achieving heat dissipation for the internal components and ensuring the components within the instrument operate at a suitable temperature. Operating within a suitable temperature range, the dust filter 204 prevents dust from entering the detection housing 1 during air exchange through the heat dissipation slot 203. Due to the magnetic connection between magnetic strip 1 205 and magnetic strip 206, the dust filter 204 is firmly fixed in the heat dissipation slot 203, ensuring that it does not shift or fall off during airflow. This effectively protects the electronic components and mechanical parts inside the detection housing 1 from dust contamination. When too much dust accumulates on the surface of the dust filter 204, the magnetic strip 1 205 and magnetic strip 206 can be disconnected with a little force, making it easy to remove the dust filter 204 for replacement or rinsing.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tablet hardness tester, comprising a test shell (1), characterized in that: A servo motor (3) is fixedly connected to the right side of the inner wall of the detection shell (1). A rotating column (4) is fixedly connected to the output end of the servo motor (3). A small gear (5) is fixedly connected to the left and right ends of the outer side of the rotating column (4). A connecting cylinder (8) is rotatably connected to the left and right sides of the inner wall of the detection shell (1). A nut gear (7) is fixedly connected to the opposite side of the two connecting cylinders (8). The outer walls of the two nut gears (7) and the small gear (5) are connected by a chain (9). A screw (6) is threadedly connected to the inner wall of the two nut gears (7). A sliding column (10) is fixedly connected to the opposite side of the two screws (6). Each of the sliding columns (10) is fixedly connected to a micro airbag (11) on one side. Each of the two micro airbags (11) is fixedly connected to a plurality of pressure sensors (12) on one side. Each of the two micro airbags (11) is fixedly connected to a micro air valve (14) at the top outer side. Each of the inner walls of the detection shell (1) is fixedly connected to a compressed air tank (13) on the left and right sides. Each of the two compressed air tanks (13) is fixedly connected to a vent pipe (15) on the front side. Each of the detection shells (1) is slidably connected to a collection shell (16) on the front side. Each of the detection shells (1) is provided with a cooling mechanism (2) on the front side. The cooling mechanism (2) is used to rapidly cool the inside of the device.

2. The tablet hardness tester according to claim 1, characterized in that: The cooling mechanism (2) includes two cooling fans (201), the bottom of which is fixedly connected to the bottom of the inner wall of the detection shell (1). Two air diffusers (202) are fixedly connected to the bottom of the inner wall of the detection shell (1). Two heat dissipation slots (203) are opened on the front side of the detection shell (1). Dust filters (204) are slidably connected to the inner walls of the two heat dissipation slots (203). Two magnetic strips (205) are fixedly connected to the rear side of the two dust filters (204). Two magnetic strips (206) are fixedly connected to the rear side of the inner walls of the two heat dissipation slots (203).

3. The tablet hardness tester according to claim 1, characterized in that: A pressure display (18) is fixedly connected to the opposite side of each of the two compressed air tanks (13), and an alarm (19) is fixedly connected to the top of each of the two compressed air tanks (13).

4. The tablet hardness tester according to claim 1, characterized in that: The detection shell (1) has two mounting slots (20) on its front side, and the collection shell (16) has two mounting posts (21) fixedly connected to its rear side.

5. A tablet hardness tester according to claim 1, characterized in that: The detection shell (1) is rotatably connected to both the left and right sides of the inspection door (23), and a handle (24) is rotatably connected to the opposite side of the two inspection doors (23).

6. A tablet hardness tester according to claim 1, characterized in that: The bottom of the detection shell (1) is fixedly connected with multiple rubber pads (17), and the bottom ends of the multiple rubber pads (17) are all frosted.

7. A tablet hardness tester according to claim 1, characterized in that: The inner wall of the detection shell (1) is fixedly connected with sealing rings (25) on both the left and right sides, and both sealing rings (25) adopt an annular design.

8. A tablet hardness tester according to claim 1, characterized in that: The top front side of the detection housing (1) is fixedly connected to a control panel (22), which is electrically connected to a cooling fan (201), a servo motor (3), a pressure sensor (12), a compressed air tank (13), a pressure display (18), and an alarm (19).

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