A grinding and injecting device for solid medicine and an injecting system thereof

Abstract

The utility model relates to a kind of for solid medicine's grinding medicine injection device, comprising: vertically arranged cylinder;Cylinder cover, the cylinder cover is with the cylinder with detachable way be connected together by rotating connecting mechanism, the cylinder and the cylinder cover are configured to form grinding chamber for receiving solid medicine in their inside, the top of the grinding chamber is formed with the feed inlet for receiving the solid medicine, and its two sides are formed with the input port for receiving liquid and the output port for discharging liquid respectively;Wherein, the bottom surface of the cylinder cover is configured with grinding assembly, the grinding assembly includes axially arranged needle, the cutting blade group around the needle arrangement and multiple convex structures distributed between the cutting blade group.The utility model also relates to a kind of medicine injection system, to improve grinding efficiency, while realizing grinding-mixing-infusion whole-process closed operation.

Description

Technical Field

[0001] This utility model relates to the field of solid drug pulverization and injection technology, specifically to a grinding and injection device and its injection system for solid drugs. Background Technology

[0002] Currently, hospitals typically use the following procedure when administering injections of solid medications (such as tablets): First, the solid medication is pulverized into powder using a separate grinder. Then, the powder is transferred to an open container, and a suitable amount of solvent (such as saline) is drawn into the container using a syringe and manually stirred. Finally, the mixture is drawn and injected into the patient through a syringe or infusion line. This method has the following drawbacks: 1. High risk of contamination: The ground medication powder needs to be transferred multiple times (grinding container → mixing container → syringe), and the operation is exposed to an open environment, making it susceptible to contamination by microorganisms or foreign matter. 2. Drug loss and dosage error: Medication powder can easily remain on the grinder walls, mixing container, and syringe during the transfer process, resulting in an actual injected dose lower than the theoretical value, seriously affecting the accuracy of drug administration. 3. Cumbersome and time-consuming operation: Multiple independent instruments, such as the grinder, mixing container, and syringe, need to be used alternately, making the operation cumbersome. Therefore, developing an integrated grinding and injection device that improves grinding efficiency while achieving a closed-loop operation throughout the "grinding-mixing-infusion" process is an urgent problem to be solved. Utility Model Content

[0003] To address the problems existing in the prior art, the first objective of this utility model is to provide a grinding and dispensing device for solid drugs. The device is rotatably connected to a cylinder body via a cap, and a grinding component is provided on the bottom surface of the cap. Under the action of the cap's rotation, the grinding component squeezes, crushes, and grinds the solid drug, thereby transforming the solid drug from block or granular form to powder form. Finally, liquid is introduced to deliver the powder form of the drug to the human body.

[0004] The second objective of this invention is to provide a drug delivery system that improves grinding efficiency while achieving a closed-loop operation throughout the grinding-mixing-infusion process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A grinding and dispensing device for solid drugs includes: a vertically arranged cylindrical body; a cap, the cap being detachably connected to the cylindrical body via a rotary connection mechanism; the cylindrical body and the cap being configured to form a grinding chamber for receiving the solid drug inside them; the top of the grinding chamber having an inlet for receiving the solid drug, and its sides having an inlet for receiving liquid and an outlet for discharging liquid, respectively; wherein, a grinding assembly is disposed on the bottom surface of the cap, the grinding assembly including an axially arranged pin, a set of cutting blades arranged around the pin, and a plurality of protrusions distributed between the cutting blades.

[0006] Furthermore, the axial length of the ejector pin is greater than the working height of the cutting blade assembly.

[0007] Furthermore, the rotary connection mechanism includes: a first thread disposed on the inner wall of the feed inlet; a second thread disposed on the outer wall of the cylinder cover and cooperating with the first thread; and an annular sealing groove located below the second thread, wherein a sealing ring is disposed in the annular sealing groove.

[0008] Furthermore, the cutting blade assembly has multiple arc-shaped blades arranged circumferentially along the bottom surface of the cylinder cover, and the central angle of the arc-shaped blades is 270-280 degrees.

[0009] Furthermore, the protrusion structure is a hemispherical protrusion, a cylindrical protrusion, or a conical protrusion.

[0010] Furthermore, the bottom surface of the grinding chamber is provided with an annular groove that mates with the cutting blade assembly, and an elastic element is provided in the annular groove.

[0011] Furthermore, the elastic element includes an annular plate and a spring disposed at the bottom of the annular plate, the spring being fixed to the bottom surface of the annular groove.

[0012] Furthermore, both the input port and the output port are equipped with switching valves.

[0013] Furthermore, the upper part of the cap has a handle, and the surface of the handle has anti-slip texture.

[0014] A drug delivery system includes: a grinding and injection device as described above; a syringe, the injection end of which is connected to the input port of the grinding and injection device; and an infusion line, one end of which is connected to the output port of the grinding and injection device, and the other end of which is connected to the human body.

[0015] This utility model has the following advantages: 1. This utility model discloses a grinding and dispensing device for solid drugs, employing a double-sealing design of threaded connection and sealing ring to ensure a closed state throughout the entire process from grinding and mixing to dispensing. The device is equipped with switching valves at both the inlet and outlet to effectively prevent powder leakage during grinding. The grinding assembly adopts a three-stage progressive grinding structure: First, pre-crushing is performed by a pin extending beyond the arc-shaped blade, which preferentially penetrates the tablet to create stress concentration points, causing the tablet to break down into granular particles; second, cutting is achieved using an arc-shaped blade with a central angle of 270-280° and an inclined cutting edge, achieving a "shallow to deep" shearing effect. Simultaneously, a 1 / 4 circumferential gap is reserved between the arc-shaped blade and the bottom surface of the grinding chamber, forming a vortex motion channel for the powder, enhancing the stirring effect and further transforming the granular drug into granules; finally, multiple protrusions on the bottom surface of the cylinder cover, working in conjunction with the bottom surface of the grinding chamber, perform secondary grinding of the powder, transforming the granular drug into powder.

[0016] 2. The top of the cylinder cap of this utility model is equipped with a plate-shaped handle to provide a stable grip, effectively reducing hand fatigue and thus shortening the time required for a single grinding cycle. The cylinder cap and cylinder body are connected by a threaded fit for quick locking and unlocking. Combined with the sealing ring embedded in the annular sealing groove, the device can be assembled with one hand. Furthermore, both the inlet and outlet ports use omnidirectional interfaces, avoiding the time wasted distinguishing left from right during operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the grinding and injection device for solid drugs according to this utility model.

[0018] Figure 2 This is a structural cross-sectional view of the grinding and injection device for solid drugs according to this utility model.

[0019] Figure 3 This is an exploded perspective view of the grinding and injection device for solid drugs according to this utility model.

[0020] Figure 4 This is an exploded view of the structure of the grinding and injection device for solid drugs according to this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the cylinder cap and grinding assembly of this utility model.

[0022] Figure 6 This is a schematic diagram of the grinding assembly of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of the cylindrical body of this utility model.

[0024] Wherein, 1 is the cylinder body, 2 is the cylinder cover, 3 is the rotary connection mechanism, 301 is the first thread, 302 is the second thread, 303 is the annular sealing groove, 304 is the sealing ring, 4 is the grinding chamber, 401 is the feed port, 402 is the input port, 403 is the output port, 404 is the annular groove, 5 is the grinding assembly, 501 is the ejector pin, 502 is the cutting blade assembly, 502a is the arc-shaped blade, 503 is the protruding structure, and 6 is the handle. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figure 1 The figure shows a preferred embodiment of a grinding and injection device for solid drugs. As shown, the grinding and injection device mainly includes a cylinder 1 and a cap 2. The cylinder 1 is vertically arranged and open at the top. It has an overall cylindrical structure. The cap 2 also has an overall cylindrical structure and matches the shape of the cylinder 1. The bottom surface of the cap 2 is flat, and a grinding component 5 is disposed on the bottom surface of the cap 2.

[0027] Next refer to Figure 2-4 The cap 2 is connected to the top of the cylinder 1 and is detachably connected to the cylinder 1 by a rotating connecting mechanism 3. The cylinder 1 and the cap 2 are configured to form a grinding chamber 4 for receiving solid drugs inside them, so as to form a sealed chamber. The top of the grinding chamber 4 has an inlet 401 for receiving solid drugs. Solid drugs generally refer to flakes, blocks, columns, etc. The bottom surface of the grinding chamber 4 is a plane. An inlet 402 for receiving liquid and an outlet 403 for discharging liquid are formed on both sides of the grinding chamber 4. Both inlet 402 and outlet 403 are located at the bottom of the grinding chamber 4. During the grinding process, both inlet 402 and outlet 403 are closed. After the drug is ground, inlet 402 and / or outlet 403 are opened as needed. Specifically, both inlet 402 and outlet 403 are equipped with a switch valve (not shown in the figure). The switch valve controls the opening or closing of inlet 402 and outlet 403 to prevent powder leakage during the grinding and injection processes, ensuring the accuracy of powder and liquid injection. The switch valve can be a check valve, a clamping valve, etc. Furthermore, both inlet 402 and outlet 403 use non-directional interfaces to avoid the time loss of distinguishing left and right during operation.

[0028] In an embodiment not shown, both the input port 402 and the output port 403 are detachably equipped with sealing plugs, which can block the input port 402 and the output port 403 when the grinding and injection device is not in use, in order to prevent contamination of the interface.

[0029] Continue to refer to Figure 2-4The rotary connection mechanism 3 includes a first thread 301, a second thread 302, and a sealing ring 304. The first thread 301 is located on the inner wall of the feed inlet 401, and the second thread 302 is located on the outer wall of the cover 2 and engages with the first thread 301. The cover 2 is screwed into the cylinder 1 via the threads. During rotation, the lower part of the cover 2 continuously extends into the cylinder 1. The grinding component 5 on its bottom surface is rotatable relative to the grinding chamber 4. Through the interaction between the grinding component 5 and the bottom surface of the grinding chamber 4, the tablets are squeezed, crushed, and ground, transforming the tablets from block to granules and then to powder. This operation is labor-saving and can improve grinding efficiency and effect. An annular sealing groove 303 is provided on the outer wall of the cover 2 and is located below the second thread 302. A sealing ring 304 is disposed in the annular sealing groove 303. This effectively prevents the powder or liquid medicine inside the grinding chamber 4 from overflowing from the feed inlet 401, ensuring the dosage of the powder or liquid medicine.

[0030] Reference Figure 5 and Figure 6 The figure illustrates a preferred embodiment of the grinding assembly 5. The grinding assembly 5 includes a pin 501, a cutting blade assembly 502, and multiple protrusions 503. These components form a grinding surface on the bottom surface of the cover 2. The pin 501 is axially positioned on the bottom surface of the cover 2, with its end facing the bottom surface of the grinding chamber 4. The end of the pin 501 has a tapered bevel for pre-crushing the tablets. The axial length of the pin 501 is greater than the working height of the cutting blade assembly 502, which is the height of the cutting blade assembly 502 extending towards the bottom surface of the grinding chamber 4. This allows the pin 501 to preferentially penetrate the tablet, creating a stress concentration point and causing the tablet to break down from a sheet-like shape into large, blocky particles. The cutting blade assembly 502 is arranged around the ejector pin 501. When the ejector pin 501 contacts the tablet, as the cap is continuously screwed in and pressed down, the lumpy drug disperses and comes into contact with the cutting blade assembly 502 for crushing, further transforming the lumpy drug into granules. Multiple protruding structures 503 are distributed at certain intervals between the cutting blade assembly 502. The working height of the cutting blade assembly 502 is greater than the height of the protruding structures 503 extending beyond the bottom surface of the cap 2. Under the combined action of the protruding structures 503 and the bottom surface of the grinding chamber 4, the granular drug undergoes secondary grinding, transforming it into powder. After the tablet grinding is complete, the cap 2 can be rotated in the reverse direction, leaving a certain distance between the bottom surface of the cap 2 and the bottom surface of the grinding chamber 4, allowing external liquid to enter through the inlet 402.

[0031] Continue to refer to Figure 5 and Figure 6The cutting blade assembly 502 has multiple arc-shaped blades 502a arranged circumferentially along the bottom surface of the cap 2. There are three arc-shaped blades 502a, arranged in a ring at certain intervals on the bottom surface of the cap 2. The three arc-shaped blades 502a are on the same central axis. The first end of each arc-shaped blade 502a has an inclined cutting edge to cut the blocky tablets, achieving a shearing effect from shallow to deep. The central angle of the arc-shaped blade 502a is 270-280 degrees, preferably 270 degrees. This means that the arc-shaped blade 502a covers three-quarters of the bottom surface of the cap 2 with a ring structure, and the remaining quarter forms a notch α of 80-90 degrees, preferably 90 degrees. This arrangement allows space for the movement of the powder, enhancing the stirring effect and ensuring thorough cutting and grinding of the tablets, thus improving the cutting and grinding effect.

[0032] The raised structure 503 is a hemispherical protrusion, a cylindrical protrusion, or a conical protrusion. In this embodiment, the raised structure 503 is a hemispherical protrusion, which can interact with the bottom surface of the grinding chamber 4 to achieve grinding.

[0033] like Figure 2 , 4 As shown in Figure 7, the bottom surface of the grinding chamber 4 is provided with an annular groove 404 that mates with the cutting blade assembly 502, allowing the arc-shaped blade 502a to rotate within the annular groove 404 and enabling the protruding structure 503 to contact the bottom surface of the grinding chamber 4 for secondary grinding. The number of annular grooves 404 can be configured according to the number of arc-shaped blades 502a, for example, 2, 3, 5, etc.

[0034] In an embodiment not shown, an elastic element is provided within the annular groove 404. The elastic element includes an annular plate and a spring disposed at the bottom of the annular plate. The annular plate cooperates with the annular groove 404, and the spring is fixed to the bottom surface of the annular groove 404. Utilizing the spring's own extension and contraction properties, the annular plate can move within the height range of the annular groove 404. When the arc-shaped blade 502a operates to the upper surface of the annular groove 404, with continuous rotation and downward pressure, the arc-shaped blade 502a first contacts the annular plate, then continues to press the annular plate towards the bottom surface of the annular groove 404. At this time, the spring at its bottom forms a certain preload. After grinding, the arc-shaped blade 502a is moved upward to a certain height by rotating the cylinder cover 2 in the opposite direction, causing the arc-shaped blade 502a to separate from the annular plate. Simultaneously, the spring releases its stored energy, pushing the annular plate back to a position flush with the upper surface of the annular groove 404. This design allows powder that may be trapped in the annular groove 404 during the grinding process to be transferred to the bottom of the grinding chamber 4, thereby ensuring that the powder will not remain in the annular groove 404 during the subsequent liquid delivery process and guaranteeing the accuracy of the solid drug dosage.

[0035] Return to reference Figure 1 and Figure 2 The upper part of the cap 2 has a handle 6, and the surface of the handle 6 has anti-slip texture. In this embodiment, the handle 6 is plate-shaped, which makes it easy to grip and operate, thereby improving grinding efficiency. Of course, it can also be other shapes, such as cross-shaped, ring-shaped, or T-shaped, etc.

[0036] In an embodiment not shown, the outer wall of the cylinder 1 is provided with an observation port to observe the state of grinding and drug injection inside the grinding chamber 4.

[0037] In an embodiment not shown, a drug delivery system mainly includes a grinding and injection device, a syringe, and an infusion line. The injection end of the syringe is connected to the inlet 402 of the grinding and injection device, one end of the infusion line is connected to the outlet 403 of the grinding and injection device, and the other end of the infusion line is connected to the human body. Specifically, firstly, the syringe is connected to the inlet 402, and the valve is opened, allowing the solvent, which can be physiological saline, to be injected directly into the grinding chamber 4 through the inlet 402. Then, the solvent mixes with the ground drug powder inside the grinding chamber 4. After mixing, one end of the infusion line is connected to the outlet 403, and then the valve of the outlet 403 is opened. Under the pressure of the syringe, the solvent and drug powder are directly injected into the human body, thereby achieving a closed-loop operation of the entire grinding-mixing-infusion process.

[0038] In summary, this utility model's grinding and dispensing device for solid drugs employs a double-sealing design with threaded connections and sealing rings to ensure a closed state throughout the entire process from grinding and mixing to dispensing. The device is equipped with switching valves at both the inlet and outlet to effectively prevent powder leakage during grinding. The grinding assembly adopts a three-stage progressive grinding structure: First, pre-crushing is performed by a pin extending beyond the arc-shaped blade, which preferentially penetrates the tablet to create stress concentration points, causing the tablet to break down into granular particles; second, cutting is achieved using an arc-shaped blade with a central angle of 270-280° and an inclined cutting edge, achieving a "shallow to deep" shearing effect. Simultaneously, a 1 / 4 circumferential gap is reserved between the arc-shaped blade and the bottom surface of the grinding chamber, forming a vortex motion channel for the powder, enhancing the stirring effect and further transforming the granular drug into granules; finally, multiple protrusions on the bottom surface of the cylinder cover, working in conjunction with the bottom surface of the grinding chamber, perform secondary grinding of the powder, transforming the granular drug into powder. The top of the cylinder cap of this invention is equipped with a plate-shaped handle to provide a stable grip, effectively reducing hand fatigue and thus shortening the time required for a single grinding cycle. The cylinder cap and cylinder body are connected by a threaded fit for quick locking and unlocking. Combined with the sealing ring embedded in the annular sealing groove, the device can be assembled with one hand. Furthermore, both the inlet and outlet ports are omnidirectional, avoiding the time wasted distinguishing left from right during operation.

[0039] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention. The embodiments described in this disclosure are intended as non-limiting examples, and other embodiments may take various and alternative forms. Furthermore, the drawings are not necessarily to scale and may present simplified expressions of various features of the present disclosure, including, for example, specific dimensions, orientations, positions, and shapes. Details associated with such features will be determined in part by the intended application and usage environment of the described embodiments.

[0040] The detailed description and accompanying drawings are supporting and descriptive of this teaching, but the scope of this teaching is defined only by the claims. While the best mode and some other embodiments for carrying out this teaching have been described in detail, various alternative designs and embodiments exist for practicing the teaching as defined in the appended claims. Furthermore, this disclosure expressly includes combinations and sub-combinations of the elements and features set forth above and below.

Claims

1. A grinding and dispensing device for solid drugs, characterized in that, include: A vertically arranged cylindrical body; A cylinder cover is detachably connected to the cylinder body via a rotary connection mechanism. The cylinder body and the cylinder cover are configured to form a grinding chamber inside them for receiving solid drugs. The top of the grinding chamber has an inlet for receiving the solid drugs, and the sides of the chamber have inlets for receiving liquids and outlets for discharging liquids, respectively. The bottom surface of the cylinder cover is provided with a grinding assembly, which includes an axially arranged ejector pin, a cutting blade assembly arranged around the ejector pin, and a plurality of protrusions distributed between the cutting blade assemblies.

2. The grinding and dispensing device for solid drugs according to claim 1, characterized in that, The axial length of the ejector pin is greater than the working height of the cutting blade assembly.

3. The grinding and dispensing device for solid drugs according to claim 1, characterized in that, The rotary connection mechanism includes: A first thread is provided on the inner wall of the feed inlet; A second thread is provided on the outer wall of the cylinder cover and mates with the first thread; An annular sealing groove is located below the second thread, and a sealing ring is disposed within the annular sealing groove.

4. A grinding and dispensing device for solid drugs according to claim 1 or 2, characterized in that, The cutting blade assembly has multiple arc-shaped blades arranged circumferentially along the bottom surface of the cylinder cover, and the central angle of the arc-shaped blades is 270-280 degrees.

5. A grinding and dispensing device for solid drugs according to claim 1, characterized in that, The protrusion structure is a hemispherical protrusion, a cylindrical protrusion, or a conical protrusion.

6. The grinding and dispensing device for solid drugs according to claim 1, characterized in that, The bottom surface of the grinding chamber is provided with an annular groove that mates with the cutting blade assembly, and an elastic element is provided in the annular groove.

7. A grinding and dispensing device for solid drugs according to claim 6, characterized in that, The elastic element includes an annular plate and a spring disposed at the bottom of the annular plate, the spring being fixed to the bottom surface of the annular groove.

8. A grinding and dispensing device for solid drugs according to claim 1, characterized in that, Both the input port and the output port are equipped with switching valves.

9. A grinding and dispensing device for solid drugs according to claim 1, characterized in that, The upper part of the cylinder cap has a handle, and the surface of the handle has anti-slip texture.

10. A drug delivery system, characterized in that, include: The grinding and dispensing apparatus as described in any one of claims 1-9; A syringe, the injection end of which is connected to the input port of the grinding and injecting device; An infusion tubing, one end of which is connected to the output port of the grinding and injecting device, and the other end of which is connected to the human body.

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