TWI873041B - Method for automatically extracting medicine and automatic medicine extracting mechanism - Google Patents

Abstract

The present invention provides a method for automatically extracting medicine and an automatic medicine extracting mechanism thereof, which are used to automatically control a syringe to extract a fixed amount of medicine from a medicine bottle. The steps are as follows: first, an automatic medicine extracting device is provided and a syringe and a medicine bottle are fixed thereon. After setting the medicine extraction amount, the automatic medicine extracting mechanism obtains a first displacement distance value according to its calculation, and obtains a second displacement distance value according to its calculation after detecting the position information of the syringe and the medicine bottle. The power component of the automatic medicine extracting device is driven to make the syringe piston rod move in a first direction according to the first displacement distance value, and then the medicine bottle is moved in a first direction according to the first displacement distance value. The syringe moves according to the second displacement distance value, and then executes the actual extraction step, so that the piston rod moves in the opposite direction and then moves in the first direction to extract the liquid medicine, and then detects the extraction state of the syringe, and repeats the actual extraction step when the first signal and/or the second signal are obtained until the first signal and the second signal are not obtained, wherein the syringe has a main accommodating barrel section, an extension barrel section and a needle section, the first signal is generated by detecting that the connection between the main accommodating barrel section and the extension barrel section does not have a light-shielding state, and the second signal is generated by detecting that the connection between the extension barrel section and the needle section does not have a light-shielding state. Accordingly, the goal of extracting a fixed amount of medicine can be achieved automatically, effectively avoiding dangerous nursing situations such as air in the syringe or inaccurate drug dosage due to different technical experience and only visual judgment of the drug extraction status.

Description

Method for automatically extracting medicine and automatic medicine extracting mechanism

The present invention is related to the field of nursing technology, in particular, a method for automatically extracting a fixed amount of medicine and an automatic drug extraction mechanism that can effectively prevent errors in drug extraction from causing air to be injected into the patient's body or an incorrect amount of medicine to endanger the patient's safety.

Drug injection is a very common medical procedure used to deliver drugs directly into the patient's body. Compared with oral medication, injection has better efficacy, can effectively prevent the drug from being broken down in the digestive system, and can also have more precise control over the drug dosage.

To perform a drug injection, a nurse must first draw the drug from the bottle into a syringe and visually check whether the dosage is correct and whether there is air in the syringe. These two points are very important to check, because incorrect drug dosage may cause serious harm to the patient, and if there is air in the syringe that is not removed when the drug is drawn, the air may be injected into the blood vessels along with the drug, causing air embolism, which may even be life-threatening in severe cases. However, manual visual inspection is still prone to inaccurate dosage and undetected trace amounts of air in the syringe due to factors such as the different levels of skills and experience of nurses, busy nursing work, and observation errors caused by fatigue or vision problems. In addition, when patients need a more precise dosage, the existing technology must use syringes with different volume units to draw the corresponding dosage and then inject it to the patient at the same time, which requires the patient to undergo multiple needle injections, resulting in increased discomfort for the patient. In other words, the current drug drawing process still has room for improvement in order to provide patients with safer and higher-quality injection medical treatment.

In view of this, the invention team conceived and proposed a method for automatically extracting drugs and an automatic drug extraction mechanism, which uses special execution steps and structural design to achieve the goal of automatically extracting a fixed amount of drugs and ensure that the syringe does not have air, so as to eliminate many shortcomings of the existing drug extraction and injection operations.

One of the purposes of the present invention is to provide a method for automatically extracting medicine and an automatic medicine extraction mechanism, which can automatically extract an accurate quantitative medicine solution and detect the state of the syringe after extracting the medicine solution to prevent injection medical accidents caused by air inclusion, thereby improving the quality and safety of care.

To achieve the above-mentioned purpose, the present invention proposes a method for automatically extracting medicine, which is used to automatically control a syringe to extract a fixed amount of medicine from a medicine bottle, comprising the following steps: providing an automatic medicine extraction device and adjusting a power component of the automatic medicine extraction device to an initial positioning point; fixing the syringe and the medicine bottle on the automatic medicine extraction device, and the medicine bottle is inverted and located above the needle tip of the syringe, and the piston rod of the syringe is locked in the power component; setting a medicine extraction amount, and obtaining a first displacement according to the medicine extraction amount. The invention relates to a method for preparing a syringe and a medicine bottle, wherein the syringe and the medicine bottle are provided with a distance value; detecting the syringe and the medicine bottle to obtain a position information, and obtaining a second displacement distance value according to the position information processing operation; driving the power assembly to make the piston rod of the syringe move in a first direction by a displacement amount corresponding to the first displacement distance value; making the medicine bottle move by a displacement amount corresponding to the second displacement distance value, so that the needle tip is inserted into the medicine bottle, and the needle tip is located below the liquid surface of the medicine liquid; performing a real extraction step, including: driving the power assembly to make the piston rod of the syringe move in a second direction by a displacement amount corresponding to the second displacement distance value; The invention relates to a method for extracting liquid medicine into the syringe by driving the power assembly to move the piston rod of the syringe in the first direction by the displacement amount corresponding to the first displacement distance value, wherein the first direction is opposite to the second direction; and driving the power assembly to move the piston rod of the syringe in the first direction by the displacement amount corresponding to the first displacement distance value, so as to extract liquid medicine into the syringe; detecting the extraction state of the syringe, and when a first signal and/or a second signal are obtained, repeatedly executing the actual extraction step until the first signal and the second signal are not obtained; wherein the syringe has a main receiving barrel section, a An extension barrel section and a needle section, One end of the extension barrel section is connected to and communicated with the main accommodating barrel section, and the barrel diameter of the extension barrel section is smaller than that of the main accommodating barrel section, and the other end of the extension barrel section is provided with the needle section; the first signal is generated for detecting that the connection between the main accommodating barrel section and the extension barrel section does not have a light-shielding state, and the second signal is generated for detecting that the connection between the extension barrel section and the needle section does not have a light-shielding state; moving the medicine bottle to separate the syringe from the medicine bottle; and removing the syringe with the medicine solution.

Based on the above method, preferably, when the first signal and the second signal are not obtained, an image is captured for the connection between the extension tube section and the needle section, and the image is analyzed to determine whether the liquid level is lower than the connection between the extension tube section and the needle section. When the liquid level is lower than the connection between the extension tube section and the needle section, a third signal is generated, and after obtaining the third signal, the actual extraction step is repeatedly executed until the first signal, the second signal and the third signal are not obtained, and then the syringe is removed to increase the probability of preventing air from remaining in the syringe.

Preferably, the position information is an image taken for the syringe, the medicine bottle and a reference icon, and the second displacement distance value is a first distance between the syringe needle tip and the mouth of the medicine bottle, a second distance between the mouth of the medicine bottle and the liquid surface of the medicine, and a length of the reference icon in the captured image, and the first distance and the second distance are respectively compared with the length to obtain a ratio, and then calculated with an actual length value of the reference icon to obtain the ratio.

Based on the same technical concept, the present invention also proposes an automatic drug extraction mechanism for executing the aforementioned method of automatically extracting drugs, comprising: a base; a first detector, disposed on the base, for detecting the connection between the main accommodating barrel section and the extension barrel section of the syringe, and generating the first signal when there is drug solution in the syringe and the connection between the main accommodating barrel section and the extension barrel section is not in a light-shielding state; a second detector, disposed on the base, for detecting the connection between the extension barrel section and the syringe; The second signal is generated when there is liquid medicine in the syringe and the connection between the extension tube section and the needle section is not in a light-shielding state; a third detector is arranged on the base, used to detect the syringe and the medicine bottle to obtain the position information; and an automatic medicine extraction device is arranged on one side of the base, comprising: a box body, having a working surface, and a first sliding hole and a second sliding hole are opened on the working surface, the second sliding hole is located above the first sliding hole and is arranged in a straight line with the first sliding hole; a moving A force assembly is provided in the box and includes a moving member and a power source, the power source is provided in the box, one end of the moving member is connected to the power source, and the other end passes through the first sliding hole and is located outside the box, and the end of the moving member located outside the box has a latch portion, the latch portion is a columnar structure and has a first surface and a second surface that are perpendicular to each other, a first latch groove is provided on the first surface, a second latch groove is provided on the second surface, and the first latch groove The first fixing assembly is connected to the working surface of the box body and is located on the top of the power assembly to fix the syringe. The first fixing assembly includes a first fixing body, two first guides and a first stopper. The first fixing body has a first connecting piece and two first extension pieces. The first connecting piece is connected to the box body. The first extension pieces are formed by obliquely extending from the two ends of the first connecting piece, so that the outer contour of the first fixing body is a triangular shape with an opening at the tip, the first guides are respectively pivoted at the ends of the first extension piece connected to the first connecting piece, and each of the first guides is rotatable about its center as a rotation axis, the first stopper is arranged between the first extension pieces and in front of the first connecting piece; a movable plate is arranged on the working surface of the box body and is located on the top side of the first fixing assembly corresponding to the second sliding hole; a second fixing assembly is arranged on the movable plate for fixing the medicine bottle The second fixing assembly includes a second fixing body, two second guides and a second stopper. The second fixing body has a second connecting piece and two second extension pieces. The second connecting piece is connected to the movable plate. The second extension pieces are formed by the two ends of the second connecting piece extending obliquely, so that the outer contour of the second fixing body is a triangle with an opening at the tip. The second guides are respectively pivoted at the ends of the second extension piece opposite to the ends connected to the second connecting piece, and each The second guide member is in a state of being rotatable about its center as a rotating axis, the second stop member is disposed between the second extension pieces and in front of the second connecting piece; a movable member is disposed in the housing and has a linkage end, the linkage end extends from the second sliding hole and is connected to the movable plate to drive the movable plate; and a processor is disposed in the housing and is electronically connected to the power assembly, the movable member, the first detector, the second detector and the third detector, the processor It includes a calculation processing unit and a driving unit. The calculation processing unit is used to calculate the second displacement distance value according to the position information and calculate the first displacement distance value according to the drug extraction amount. The driving unit is connected to the calculation processing unit in telecommunication to drive the power component and the movable part according to the first displacement distance value and the second displacement distance value, drive the power component when receiving the first signal and/or the second signal, and drive the power component to move to the initial positioning point.

Preferably, the box further includes a pair of stabilizing members, which are arranged on opposite sides of the movable plate. The pair of stabilizing members each have a convex rib, and the two ends of the movable plate are respectively provided with a slide groove corresponding to the convex rib. The convex ribs are movably arranged in the slide grooves to facilitate more stable movement of the medicine bottle.

Preferably, the automatic drug extraction mechanism further includes a fourth detector, which is disposed on the base and is electrically connected to the processor. The fourth detector is used to capture an image of the connection between the extension tube section and the needle section when the first signal and the second signal are not obtained, and analyze and determine whether the liquid level in the image is lower than the connection between the extension tube section and the needle section. When the liquid level is lower than the connection between the extension tube section and the needle section, a third signal is generated. After the processor obtains the third signal, the driving unit drives the power assembly.

Preferably, the automatic drug extraction device further includes a reference icon, which is located on one side of the first fixed component and the second fixed component; the third detector is an image detector, which is used to capture the images of the syringe, the medicine bottle and the reference icon; the calculation processing unit of the processor stores an actual length value corresponding to the reference icon; the calculation processing unit analyzes the images of the syringe, the medicine bottle and the reference icon, extracts a first distance between the syringe needle tip and the mouth of the medicine bottle, and a second distance between the mouth of the medicine bottle and the liquid surface of the medicine, and compares it with a length of the reference icon in the image to obtain a ratio, and then calculates it with the actual length value to obtain the second displacement distance value.

Preferably, any of the first extension pieces of the first fixed body is provided with a vertical support rod, and the reference icon is provided on the vertical support rod.

Preferably, the first guide members respectively include a first shaft and a first guide body, the first shaft is passed through the center of the first guide body and is hinged with the first extension piece, the first guide body is a hollow structure and has a plurality of first arc-shaped protrusions, the first arc-shaped protrusions are arranged around the first shaft; the second guide members respectively include a second shaft and a second guide body, the second shaft is passed through the center of the second guide body and is hinged with the second extension piece, the second guide body is a hollow structure and has a plurality of second arc-shaped protrusions, the second arc-shaped protrusions are arranged around the second shaft.

Preferably, each first extension piece has a first opening on the side opposite to the first connecting piece, the first guide is assembled in the first opening and located at the end of the first extension piece, the two ends of the first stopper have a first folded portion respectively, the two ends of the first stopper pass through the first opening of each first extension piece, and the first folded portions are respectively fixed on the outer surface of the first extension pieces; each second extension piece has a second opening on the side opposite to the second connecting piece, the second guide is assembled in the second opening and located at the end of the second extension piece, the two ends of the second stopper have a second folded portion respectively, the two ends of the second stopper pass through the second opening of each second extension piece, and the second folded portions are respectively fixed on the outer surface of the second extension pieces.

In summary, the method of automatic drug extraction and the automatic drug extraction mechanism of the present invention can solve the inconvenience and danger of manual drug extraction through automation. Through the present invention, an accurate dosage can be extracted at a time, and at the same time, the dangerous situation of air in the syringe can be effectively prevented, so as to avoid dangerous situations such as air embolism in patients during injection. In other words, the present invention proposes a special step process and automatic mechanism technical features to overcome the many difficulties of nursing staff in implementing the drug extraction operation, thereby improving the quality of medical care received by patients and greatly enhancing safety. Furthermore, the present invention also proposes many additional detailed technical features to further enhance the functionality of the present invention, as described in the above paragraphs.

1: Automatic medicine extraction device

10: Cabinet

101: Working surface

1011: First slide hole

1012: Second sliding hole

102: Stabilizing parts

1021: ribs

11: Power components

111: Moving parts

1111: latch part

1112: First surface

11121: First card slot

1113: Second surface

11131: Second card slot

112: Power source

12: First fixing component

121: First fixed subject

1211: First connecting piece

1212: First extension piece

1213: Vertical support rod

1214: First opening

122: First guide member

1221: First axis

1222: The first guiding subject

12221: first arc-shaped convex part

123: First stopper

1231: First fold

13: Movable board

131: Chute

14: Second fixing component

141: Second fixed subject

1411: Second connecting piece

1412: Second extension piece

1413: Second opening

142: Second guide member

1421: Second axis

1422: Second guiding subject

14221: Second arc-shaped convex part

143: Second stopper

1431: Second fold

15:Active parts

151: Linkage end

16: Processor

161: Operation processing unit

162: Drive unit

17: Baseline Icons

2: Base

3: First detector

3a: Sending items

3b: Receiving items

4: Second detector

4a: Sending

4b: Receiving items

5: The third detector

6: The fourth detector

7: Automatic drug extraction mechanism

8: Medicine bottle

9: Syringe

90: Main container section

91: Extension barrel section

92: Needle segment

A: First direction

B: Second direction

S01~S10: Steps

S071: Steps

S072: Steps

S11: Step

Figure 1A is a schematic diagram of the process steps of the automatic drug extraction method of the preferred embodiment of the present invention (I).

Figure 1B is a schematic diagram of the steps of the method for automatically extracting drugs in a preferred embodiment of the present invention (II).

Figure 2 is a schematic diagram of the automatic drug extraction mechanism of a preferred embodiment of the present invention.

Figure 3 is a schematic diagram of the automatic drug extraction mechanism block module of the preferred embodiment of the present invention.

Figure 4 is a schematic diagram of the automatic drug extraction mechanism structure application of the preferred embodiment of the present invention (I).

Figure 5 is a schematic diagram of the automatic drug extraction mechanism structure application of the preferred embodiment of the present invention (II).

Figure 6 is a schematic diagram of the automatic drug extraction mechanism structure application of the preferred embodiment of the present invention (III).

Figure 7A is a schematic diagram of the process steps of the automatic drug extraction method of another embodiment of the preferred embodiment of the present invention (I).

Figure 7B is a schematic diagram of the steps of the method for automatically extracting drugs in another embodiment of the preferred embodiment of the present invention (II).

Figure 8 is a schematic diagram of the automatic drug extraction mechanism of another embodiment of the preferred embodiment of the present invention.

Figure 9 is a schematic diagram of the automatic drug extraction mechanism block module of another embodiment of the preferred embodiment of the present invention.

In order to enable people with general knowledge in this field to clearly understand the content of this invention, please refer to the following explanations with drawings. The structural scales, proportions, sizes, shapes or application states shown in each figure are only for illustration and are used to illustrate the technical features of this invention. They do not represent the actual structural design and should be explained in advance.

Please refer to Figures 1A, 1B, 2, 3 and 4, which are schematic diagrams (I) and (II) of the method for automatic drug extraction of a preferred embodiment of the present invention, schematic diagrams of the structure of the automatic drug extraction mechanism, schematic diagrams of the block module of the automatic drug extraction mechanism and schematic diagrams of the structure application of the automatic drug extraction mechanism (I). First, the method for automatic drug extraction is described. The method is used to automatically control a syringe 9 to extract a fixed amount of medicine from a medicine bottle 8, and includes the following steps. Provide an automatic drug extraction device 1 and adjust a power component 11 of the automatic drug extraction device 1 to an initial positioning point (step S01), wherein the initial positioning point refers to the displacement starting point of the power component 11 preset by the automatic drug extraction device 1. The syringe 9 and the medicine bottle 8 are fixed on the automatic medicine extraction device 1, and the medicine bottle 8 is inverted and located above the needle tip of the syringe 9, and the piston rod of the syringe 9 is locked in the power assembly 11 (step S02).

Then, a medicine extraction amount is set, and a first displacement distance value is obtained according to the medicine extraction amount (step S03). In another embodiment, a syringe information corresponding to the syringe 9 can also be set synchronously, so that the conditions of the syringe 9 are added during the calculation, and more accurate automatic calculation can be achieved according to different syringes. Of course, the method is also applicable to the automatic medicine extraction device 1 for the syringe 9 of a specific size. In this case, there is no need to set the information of the syringe 9 separately, and the accurate first displacement distance value can be obtained through the built-in setting automatic calculation. The syringe 9 and the medicine bottle 8 are detected to obtain a position information, and a second displacement distance value is obtained according to the position information processing calculation (step S04). After obtaining the first displacement distance value and the second displacement distance value, the syringe 9 can be driven to drive the piston rod of the power assembly 11 to move in a first direction A by a displacement amount corresponding to the first displacement distance value (step S05). Then, the medicine bottle 8 is moved by a displacement amount corresponding to the second displacement distance value, and the needle tip is inserted into the medicine bottle, and the needle tip is located below the liquid surface of the medicine (step S06).

After executing the above steps, a real extraction step (step S07) is executed, including: driving the power assembly 11 to move the piston rod of the syringe 9 toward a second direction B by a displacement corresponding to the first displacement distance value and return to the initial positioning point, wherein the first direction A is opposite to the second direction B (step S071), and then driving the power assembly 11 to move the piston rod of the syringe 9 toward the first direction A by a displacement corresponding to the first displacement distance value to extract the liquid medicine into the syringe 9 (step S072).

After the liquid medicine is drawn into the syringe 9, the drawing state of the syringe 9 is detected to confirm whether a first signal and/or a second signal are obtained (step S08), and when the first signal and/or the second signal are obtained, the actual drawing step is repeatedly performed until the first signal and the second signal are not obtained; wherein the syringe 9 has a main accommodating barrel section 90, an extension barrel section 91 and a needle section 92, and the extension barrel section 91 has a main accommodating barrel section 90, an extension barrel section 91 and a needle section 92. One end is connected to the main accommodating barrel section 90 and communicates with it, and the diameter of the extension barrel section 91 is smaller than that of the main accommodating barrel section 90, and the other end of the extension barrel section 91 is provided with the needle section 92; the first signal is generated to detect that the connection between the main accommodating barrel section 90 and the extension barrel section 91 does not have a light-blocking state, and the second signal is generated to detect that the connection between the extension barrel section 91 and the needle section 92 does not have a light-blocking state. Finally, the medicine bottle 8 is moved to separate the syringe 9 from the medicine bottle 8 (step S09), and the syringe 9 with the medicine solution can be removed (step S10).

The method is to automatically perform the drug extraction operation after the syringe 9 and the medicine bottle 8 are placed in the automatic drug extraction device 1, so that the contamination caused by human contact can be effectively avoided, and the accurate amount of medicine can be extracted for use. More importantly, through the steps of the method, it can prevent the syringe 9 from retaining air after the drug solution is extracted into the syringe 9. As mentioned above, after the syringe 9 extracts the drug solution, if there is residual air in the syringe 9, once the drug solution is directly injected into the patient's body without paying attention, it will cause air embolism, which can be fatal in severe cases. Therefore, it is very important to accurately eliminate the behavior of air in the syringe before injection. In addition, the wrong injection dosage can also cause harm to the patient, so whether the amount of liquid medicine is drawn correctly is another very important issue. The current manual drug drawing method can only rely on the nurse to visually observe whether there is air in the syringe and judge whether the amount of medicine drawn is correct. If a precise dosage is required, it is necessary to use multiple syringes with different volume units to draw separately, and then inject multiple times to give the patient the correct dosage. However, manual visual inspection and control of drug extraction are affected by many factors, such as the skills and experience of the nurse, the eye condition of the nurse such as fatigue or vision, and the busyness of the nurse, which may lead to the extraction of the wrong amount of liquid or failure to notice that there is still air in the syringe. In order to avoid the unfortunate incidents caused by the above-mentioned behavior, the invention team proposed the above-mentioned method of automatic drug extraction, which is not only to automate the drug extraction behavior, but also has the technical characteristics of avoiding air in the syringe and being able to extract the accurate drug dosage target at a time. The following is a detailed description of these steps and the technical features of the automatic drug extraction mechanism used to implement the method.

Please continue to refer to Figures 2 and 3, wherein Figure 3 is a schematic diagram of the automatic drug extraction mechanism block module of the preferred embodiment of the present invention. Based on the same technical concept, the present invention also proposes an automatic drug extraction mechanism 7 for executing the above method, which includes a base 2, a first detector 3, a second detector 4, a third detector 5 and an automatic drug extraction device 1.

The first detector 3 is provided on the base 2 to detect the connection between the main containing barrel section 90 and the extension barrel section 91 of the syringe 9, and generates the first signal when there is liquid medicine in the syringe 9 and the connection between the main containing barrel section 90 and the extension barrel section 91 is not in a light-blocking state. The second detector 4 is provided on the base 2 to detect the connection between the extension barrel section 91 and the needle section 92 of the syringe 9, and generates the second signal when there is liquid medicine in the syringe 9 and the connection between the extension barrel section 91 and the needle section 92 is not in a light-blocking state. The third detector 5 is provided on the base 2 to detect the syringe 9 and the medicine bottle 8 to obtain the position information. The first detector 3 and the second detector 4 may be photosensitive detectors, and the light transceiver structures may be arranged opposite to each other, as shown in FIG. 2 . The first detector 3 and the second detector 4 may include emitters 3a, 4a and receivers 3b, 4b, respectively, and the emitters 3a, 4a and receivers 3b, 4b are arranged opposite to each other and are located on both sides of the syringe 9 after the syringe 9 is fixed to the automatic drug extraction device 1. However, this is only a preferred example, and the types of the first detector 3 and the second detector 4 are not limited thereto.

The automatic drug extraction device 1 is disposed on one side of the base 2, and comprises a box 10, a power assembly 11, a first fixed assembly 12, a movable plate 13, a second fixed assembly 14, a movable member 15 and a processor 16. The box 10 has a working surface 101, and a first sliding hole 1011 and a second sliding hole 1012 are opened on the working surface 101, and the second sliding hole 1012 is located above the first sliding hole 1011 and is arranged in a straight line with the first sliding hole 1011. The power assembly 11 is disposed in the housing 10 and includes a moving member 111 and a power source 112. The power source 112 is disposed in the housing 10. One end of the moving member 111 is connected to the power source 112, and the other end passes through the first sliding hole 1011 and is located outside the housing 10. The end of the moving member 111 located outside the housing 10 has a latch portion 1111. The latch portion 1111 is a columnar structure and has a first surface 1112 and a second surface 1113 that are perpendicularly adjacent to each other. A first latching slot 11121 is provided on the first surface 1112, and a second latching slot 11131 is provided on the second surface 1113. The first latching slot 11121 and the second latching slot 11131 are connected to each other. Preferably, the first surface 1112 is located at the top side of the latch portion, the second surface 1113 is located at the front side of the latch portion 1111, the first latch groove 11121 is formed by being recessed from top to bottom and passes through the adjacent edges of the first surface 1112 and the second surface 1113, and the second latch groove 11131 is formed by being recessed from front to back, so that when the latch portion 1111 is viewed from the second surface 1113, the first latch groove 11121 and the second latch groove 11131 form an inverted T-shaped structure.

The first fixing assembly 12 is disposed on the working surface 101 of the box 10 and on the top side of the power assembly 11 to fix the syringe 9. The first fixing assembly 12 includes a first fixing body 121, two first guides 122 and a first stopper 123. The first fixing body 121 has a first connecting piece 1211 and two first extension pieces 1212. The first connecting piece 1211 is connected to the box 10. The first extension pieces 1212 are formed by obliquely extending from the two ends of the first connecting piece 1211, respectively, so that the outer contour of the first fixing body 121 is a triangle with an opening at the tip. The first guide members 122 are respectively pivoted at the ends of the first extension pieces 1212 connected to the first connecting piece 1211, and each of the first guide members 122 is rotatable about its center as a rotation axis. The first stopper 123 is disposed between the first extension pieces 1212 and in front of the first connecting piece 1211. When the syringe 9 is to be installed, the main accommodating barrel section 90 of the syringe 9 is pressed in between the first guides 122. The first guides 122 rotate in response to the pressure to allow the syringe 9 to pass through. The main accommodating barrel section 90 is fixed between the first stopper 123 and the first guides 122. Depending on the size of the main accommodating barrel section 90, part of it may be clamped and fixed by the first guides 122 and another part may be blocked by the first stopper 123, or the whole may be located in the space formed by the first guides 122 and the first stopper 123. At the same time, the piston rod of the syringe 9 is clamped in the first slot 11121 and the second slot 11131.

The movable plate 13 is disposed on the working surface 101 of the box 10 and is located on the top side of the first fixing assembly 12 corresponding to the second sliding hole 1012. The second fixing assembly 14 is disposed on the movable plate 13 to fix the medicine bottle 8. The second fixing assembly 14 includes a second fixing body 141, two second guide members 142 and a second stop member 143. The second fixing body 141 has a second connecting piece 1411 and two second extension pieces 1412. The second connecting piece 1411 is connected to the movable plate 13. The second extension pieces 1412 are respectively extended obliquely from the two ends of the second connecting piece 1411, so that the outer contour of the second fixing body 141 is a triangle with an opening at the tip. The second guide members 142 are respectively pivoted at the ends of the second extension piece 1412 connected to the second connecting piece 1411, and each second guide member 142 is rotatable about its center as a rotation axis. The second stopper 143 is disposed between the second extension pieces 1412 and in front of the second connecting piece 1411. The movable member 15 is disposed in the housing 10 and has a linkage end 151, which extends from the second sliding hole 1012 and is connected to the movable plate 13 to drive the movable plate 13. When the medicine bottle 8 is to be placed, the mouth of the medicine bottle 8 is facing downward, that is, toward the first fixing assembly 12, and the medicine bottle 8 is pressed in between the second guide members 142. At this time, the second guide members 142 rotate in response to the pressure force so that the medicine bottle 8 is guided to move toward the second stop member 143, and then the medicine bottle 8 is fixed between the second stop member 143 and the second guide members 142. Similarly, depending on the size of the medicine bottle 8, part of the medicine bottle 8 may be clamped and fixed by the second guide members 142 and the other part may be blocked by the first stop member 143, or the whole medicine bottle 8 may be located in the space formed by the second guide members 142 and the second stop member 143.

The processor 16 is disposed in the housing 10 and is electronically connected to the power assembly 11, the movable member 15, the first detector 3, the second detector 4, and the third detector 5. The processor 16 includes an operation processing unit 161 and a drive unit 162. The operation processing unit 161 is used to obtain the second displacement distance value according to the position information and to obtain the first displacement distance value according to the drug extraction amount. The driving unit 162 is connected to the computing unit 161 by telecommunication, and is used to drive the power assembly 11 and the movable member 15 according to the first displacement distance value and the second displacement distance value, to drive the power assembly 11 when receiving the first signal and/or the second signal, and to drive the power assembly 11 to move to the initial positioning point.

The following is a more detailed description of the preferred process example when the automatic drug extraction mechanism 7 is used to execute the aforementioned method, and please refer to Figures 4 to 6 together, wherein Figures 5 and 6 are schematic diagrams (II) and (III) of the automatic drug extraction mechanism structure application of the preferred embodiment of the present invention. First, the power assembly 11 can be moved to the initial positioning point (corresponding to step S01) by means of, for example, a mobile device or an adjustment button provided on the housing 10, and the initial positioning point is taken as the topmost side of the first sliding hole 1011 as an example. The syringe 9 and the medicine bottle 8 are fixed to the first fixing assembly 12, the power assembly 11 and the second fixing assembly 14 of the automatic drug extraction device 1 in the aforementioned manner (corresponding to step S02). Then, the drug extraction amount is set through a mobile device or a key set on the box 10. After the processor 16 receives the drug extraction amount, the calculation processing unit 161 obtains the first displacement distance value according to the drug extraction amount calculation (corresponding to step S03). Then, the third detector 5 detects the medicine bottle 8 and the syringe 9 to obtain the position information, and the calculation processing unit 161 of the processor 16 obtains the second displacement distance value according to the position information processing calculation (corresponding to step S04).

After obtaining the first displacement distance value and the second displacement distance value, the driving unit 162 drives the power assembly 11 to drive the piston rod of the syringe 9 to move in the first direction A by the displacement amount corresponding to the first displacement distance value (corresponding to step S05). Then the driving unit 162 drives the movable member 15 to drive the movable plate 13 and the second fixed assembly 14 thereon and the medicine bottle 8 to move in the direction of the first fixed assembly 12 by the displacement amount corresponding to the second displacement distance value (corresponding to step S06).

After the above actions are completed, the actual extraction step is executed. The driving unit 162 drives the power assembly 11 to move the piston rod of the syringe 9 toward the second direction B opposite to the first direction A and return to the initial positioning point (corresponding to step S071), and then moves toward the first direction A by the displacement corresponding to the first displacement distance value to extract the drug solution (corresponding to step S072).

When the syringe 9 contains liquid medicine, the first detector 3 and the second detector 4 detect the syringe 9 respectively. The first detector 3 is used to detect the state of the connection between the main containing barrel section 90 and the extension barrel section 91. When the connection does not have a light-blocking state, that is, the light beam emitted by the first detector 3 can penetrate, the first detector 3 generates the first signal, indicating that the liquid medicine does not exist in the area, that is, there is air in the area. The second detector 4 is used to detect the state of the connection between the extension barrel section 91 and the needle section 92. When the connection does not have a light-blocking state, that is, the light beam emitted by the second detector 4 can penetrate, the second detector 4 generates the second signal, indicating that the liquid medicine does not exist in the area, that is, there is air in the area. For example, FIG. 5 shows that the second detector 4 generates the second signal. At this time, the driving unit 162 continues to drive the power assembly 11 to repeat the above actions until the first detector 3 and the second detector 4 no longer generate the first signal and the second signal, indicating that there is no air inside the syringe 9 (corresponding to step S08). At this time, the medicine bottle 8 is moved in the reverse direction to separate the syringe 9 from the medicine bottle 8, and the syringe 9 can be removed from the first fixing assembly 12 and the power assembly 11 (corresponding to steps S09 and S10).

Accordingly, the method of automatically extracting medicine and the automatic medicine extracting mechanism 7 of the present invention can achieve the effects of reducing pollution, effectively avoiding air residue in the syringe 9, simplifying the extraction of accurate medicine dosage and the convenience of subsequent injection operations through special step flow and mechanism design, which can not only solve the dangerous accidents that nursing staff may encounter in extracting medicine and subsequent drug injection, but also effectively reduce the burden of nursing staff, thereby providing patients with better medical quality.

Regarding the acquisition of the position information, in one implementation, the third detector 5 can include a plurality of light shielding sensing elements (not shown in the figure). The light shielding sensing elements can be arranged in a linear and spaced manner, and the position information can be obtained based on the shielding status of the syringe 9 and the medicine bottle 8. During the calculation, the spacing distance of the light shielding sensing elements is combined for calculation, and the first displacement distance value can be obtained. In this embodiment, another detection method is used as an example. Specifically, the position information is an image taken for the syringe 9, the medicine bottle 8 and a reference icon 17, and the second displacement distance value is a first distance between the syringe 9 needle tip and the mouth of the medicine bottle 8, a second distance between the mouth of the medicine bottle 8 and the liquid level of the medicine in the captured image, and a length of the reference icon 17. The first distance and the second distance are respectively compared with the length to obtain a ratio, and then calculated with an actual length value of the reference icon 17 to obtain the obtained ratio. According to this technical feature, the automatic drug extraction mechanism 7 for executing the method has a specific structure that the automatic drug extraction device 1 further includes the reference icon 17, which is located on one side of the first fixing component 12 and the second fixing component 14. The third detector 5 is an image detector for capturing images of the syringe 9, the medicine bottle 8 and the reference icon 17. The calculation processing unit 161 of the processor 16 stores the image corresponding to the reference icon 17. The calculation processing unit 161 analyzes the images of the syringe 9, the medicine bottle 8 and the reference icon 17, extracts a first distance between the needle tip of the syringe 9 and the mouth of the medicine bottle 8, and a second distance between the mouth of the medicine bottle 8 and the liquid surface of the medicine, and compares them with a length of the reference icon 17 in the image to obtain a ratio, and then calculates with the actual length value to obtain the second displacement distance value. Preferably, any of the first extension pieces 1212 of the first fixed body 121 is provided with a vertical support rod 1213, and the reference icon 17 is provided on the vertical support rod 1213, so that the reference icon 17 can be more easily located at a roughly corresponding position with the syringe 9 and the medicine bottle 8, reducing the probability of comparison distortion. For example, after obtaining the position information, the length of the reference icon 17 in the image is captured, and the distance between the needle tip of the syringe 9 and the mouth of the medicine bottle 8 and the distance between the mouth of the medicine bottle 8 and the liquid surface of the medicine are captured at the same time, thereby obtaining the length, the first distance and the second distance. After comparing the first distance and the second distance with the length, a ratio value can be obtained, such as the ratio value of the first distance to the length. is 1.2, the ratio of the second distance to the length is 0.8, and then the actual length value is multiplied by the aforementioned ratio and then added to obtain a provisional value. For example, if the actual length value is 1cm, the provisional value is 1.2+0.8=2(cm), and in order to prevent the needle tip from exceeding the liquid surface of the drug, an adjustment value such as 0.5cm can be subtracted from the provisional value to obtain the second displacement distance value of 1.5cm.

Next, various preferred structural implementations of the automatic drug extraction mechanism 7 are described. In order to make the movable plate 13 more stable in movement, the housing 10 further includes a pair of stabilizing members 102, which are arranged on opposite sides of the movable plate 13. The pair of stabilizing members 102 each have a rib 1021, and the two ends of the movable plate 13 are respectively provided with a slide groove 131 corresponding to the rib 1021. The ribs 1021 are movably arranged in the slide grooves 131, so that the movable plate 13 can be moved more stably by the pair of stabilizing members 102 when driven by the movable member 15, avoiding the occurrence of skew or deviation.

In a preferred embodiment of the first fixing assembly 12 and the second fixing assembly 14, the first guide members 122 respectively include a first shaft 1221 and a first guide body 1222. The first shaft 1221 is passed through the center of the first guide body 1222 and is pivotally connected to the first extension piece 1212. The first guide body 1222 is a hollow structure and has a plurality of first arc-shaped protrusions 12221. The first arc-shaped protrusions 12221 are arranged around the first shaft 1221. The second guide members 142 respectively include a second shaft 1421 and a second guide body 1422. The second shaft 1421 is inserted through the center of the second guide body 1422 and is pivotally connected to the second extension piece 1412. The second guide body 1422 is a hollow structure and has a plurality of second arc-shaped protrusions 14221. The second arc-shaped protrusions 14221 are arranged around the second shaft 1421. Accordingly, it is more convenient to set the syringe 9 and the medicine bottle 8, and the stability of the syringe 9 and the medicine bottle 8 fixed on the automatic drug extraction device 1 is also improved accordingly.

In addition, further, each first extension piece 1212 has a first opening 1214 on the side connected to the first connecting piece 1211, the first guide member 122 is assembled in the first opening 1214 and is located at the end of the first extension piece 1212, and both ends of the first stopper 123 have a first folded portion 1231, both ends of the first stopper 123 pass through the first opening 1214 of each first extension piece 1212, and the first folded portions 1231 are fixed to the outer surfaces of the first extension pieces 1212. The side of each second extension piece 1412 connected to the second connecting piece 1411 has a second opening 1413, the second guide member 142 is assembled in the second opening 1413 and is located at the end of the second extension piece 1412, and the two ends of the second stopper 143 respectively have a second folded portion 1431, the two ends of the second stopper 143 pass through the second opening 1413 of each second extension piece 1412, and the second folded portions 1431 are respectively fixed to the outer surfaces of the second extension pieces 1412. In this way, the first stopper 123, the second stopper 143, the first guide members 122 and the second guide members 142 can be assembled with the first extension pieces 1212 and the second extension pieces 1412 in a better arrangement state, and provide better performance in application and fixation.

Please continue to refer to Figures 7A, 7B, 8 and 9, which are schematic diagrams (I) and (II) of the method step flow of automatic drug extraction of another embodiment of the preferred embodiment of the present invention, a schematic diagram of the structure of the automatic drug extraction mechanism and a schematic diagram of the block module of the automatic drug extraction mechanism. Based on the disclosure of the previous embodiment, it is disclosed in the present embodiment that when the first signal and the second signal are not obtained, an image is captured for the connection between the extension tube segment 91 and the needle segment 92, and it is analyzed and determined whether the liquid level in the image is lower than the connection between the extension tube segment 91 and the needle segment 92, and it is confirmed whether a third signal is obtained (step S11), wherein the third signal is generated when the liquid level is lower than the connection between the extension tube segment 91 and the needle segment 92, and after the third signal is obtained, the actual extraction step is repeatedly executed until the first signal, the second signal and the third signal are not obtained, and then the syringe 9 is removed. The automatic drug extraction mechanism 7 further includes a fourth detector 6, which is disposed on one side of the housing 10 and is electrically connected to the processor 16. The fourth detector 6 is used to capture an image of the connection between the extension tube section 91 and the needle section 92 when the first signal and the second signal are not obtained, and analyze and determine whether the liquid level in the image is lower than the connection between the extension tube section 91 and the needle section 92. When the liquid level is lower than the connection between the extension tube section 91 and the needle section 92, a third signal is generated. After the processor 16 obtains the third signal, the drive unit 162 drives the power assembly 11. Through the above steps and the fourth detector 6, another detection and judgment technology is combined to strengthen the confirmation of whether the syringe 9 contains air after extracting the liquid medicine, so as to further enhance the safety of injection care. After capturing the image, the liquid level at the connection between the extension tube section 91 and the needle section 92 is determined by the image recognition technology. If the liquid level is lower than the connection between the extension tube section 91 and the needle section 92, it indicates that there may still be a little air. At this time, the actual extraction step must be re-executed to exhaust the air in the syringe 9 and extract the required amount of medicine until the first detector 3, the second detector 4 and the fourth detector 6 all detect and do not generate the first signal, the second signal and the third signal, indicating that there is no air in the syringe 9. Only then can the syringe 9 be removed for subsequent care operations.

In summary, the method of automatic drug extraction and the automatic drug extraction mechanism of the present invention can solve the inconvenience and danger of manual drug extraction through automation. Through the present invention, the accurate amount of medicine can be extracted, and at the same time, the dangerous situation of air in the syringe can be effectively prevented from occurring, so as to avoid dangerous situations such as air embolism in patients during injection. In other words, the present invention proposes a special step process and technical features of the automated mechanism, and can overcome the many difficulties of nursing staff in implementing the drug extraction operation, thereby improving the quality of medical care received by patients and greatly enhancing safety. Furthermore, the present invention also discloses that the detection accuracy of whether air remains is enhanced through another detection technology. Through image capture, judgment and recognition technology different from light shielding, the internal state of the syringe after the medicine is extracted can be double-confirmed to further avoid dangerous situations in subsequent injection nursing operations; and regarding the technical feature of controlling the automatic movement of the medicine bottle so that the needle tip of the syringe pierces the medicine bottle and remains below the liquid level of the medicine, in one embodiment, the second displacement distance value can also be automatically obtained through image capture, judgment and recognition technology; in the automatic drug extraction mechanism, it can be through By adding a special structural design such as a stabilizing member, the stability of the movable plate when driven by the movable member can be improved; and the first guide members and the second guide members can be a structure with a shaft and a guide body, and the guide body is provided with a special structural feature consisting of a plurality of arc-shaped protrusions, which can effectively improve the convenience and stability of fixing the syringe and the medicine bottle; in addition, the present invention also proposes more detailed structural features in the first extension pieces, the second extension pieces, the first stopper and the second stopper, which can improve the stability of the medicine bottle and the syringe after being fixed. Based on field visits, observations and interviews with frontline nurses, the team of this invention is well aware that the drug injection nursing operation has difficult problems to solve and overcome in the front-end drug extraction part. In order to minimize the drug extraction operation, alleviate the burden of nurses and improve the quality of patient medical care, the team of this invention has conceived and proposed the method and mechanism described in this invention, which can achieve accurate drug extraction and prevent air residue in the syringe through automated design.

However, the above is only a preferred embodiment of the present invention and cannot be used to limit the scope of implementation of the present invention; therefore, all equivalent changes and modifications made without departing from the scope of the present invention should be included in the patent scope of the present invention.

S07~S10: Steps

S071~S072: Steps

Claims (10)

A method for automatically extracting medicine, for automatically controlling a syringe to extract a fixed amount of medicine from a medicine bottle, comprises the following steps: providing an automatic medicine extraction device and adjusting a power assembly of the automatic medicine extraction device to an initial positioning point; fixing the syringe and the medicine bottle on the automatic medicine extraction device, and the medicine bottle is inverted and located above the needle tip of the syringe, and the piston rod of the syringe is locked in the power assembly; setting a medicine extraction amount, and obtaining a first displacement distance value according to the medicine extraction amount; detecting the injection amount; The device and the medicine bottle are connected to obtain a position information, and a second displacement distance value is obtained according to the position information processing operation; the power assembly is driven to move the piston rod of the syringe in a first direction by a displacement amount corresponding to the first displacement distance value; the medicine bottle is moved by a displacement amount corresponding to the second displacement distance value, so that the needle tip is inserted into the medicine bottle, and the needle tip is located below the liquid surface of the medicine liquid; and a real extraction step is performed, including: driving the power assembly to move the piston rod of the syringe in a second direction corresponding to the first displacement distance value. The invention relates to a method for extracting liquid medicine into the syringe by moving the piston rod of the syringe in the first direction by a displacement corresponding to the first displacement distance value, wherein the first direction is opposite to the second direction; and driving the power assembly to move the piston rod of the syringe in the first direction by a displacement corresponding to the first displacement distance value, so as to extract liquid medicine into the syringe; detecting the extraction state of the syringe, and when a first signal and/or a second signal are obtained, repeatedly executing the actual extraction step until the first signal and the second signal are not obtained; wherein the syringe has a main receiving barrel section, an extension The first signal is generated for detecting that the connection between the main accommodating barrel section and the extension barrel section is not in a light-shielding state, and the second signal is generated for detecting that the connection between the extension barrel section and the needle section is not in a light-shielding state; the medicine bottle is moved to separate the syringe from the medicine bottle; and the syringe with the medicine solution is removed. The method for automatically extracting medicine as described in claim 1, wherein, when the first signal and the second signal are not obtained, an image is captured for the connection between the extension tube section and the needle section, and the image is analyzed to determine whether the liquid level is lower than the connection between the extension tube section and the needle section. When the liquid level is lower than the connection between the extension tube section and the needle section, a third signal is generated, and after obtaining the third signal, the actual extraction step is repeatedly executed until the first signal, the second signal and the third signal are not obtained, and then the syringe is removed. The method for automatically extracting medicine as described in claim 2, wherein the position information is an image taken for the syringe, the medicine bottle and a reference icon, and the second displacement distance value is a first distance between the syringe needle tip and the mouth of the medicine bottle, a second distance between the mouth of the medicine bottle and the liquid surface of the medicine, and a length of the reference icon in the captured image, and the first distance and the second distance are respectively compared with the length to obtain a ratio, and then calculated with an actual length value of the reference icon to obtain the ratio. An automatic drug extraction mechanism for executing the method of automatic drug extraction as described in claim 1, comprising: a base; a first detector, disposed on the base, for detecting the connection between the main containing barrel section and the extension barrel section of the syringe, and generating the first signal when there is liquid medicine in the syringe and the connection between the main containing barrel section and the extension barrel section is not in a light-shielding state; a second detector, disposed on the base, for detecting the connection between the extension barrel section and the needle section of the syringe, and generating the first signal when there is liquid medicine in the syringe and the connection between the main containing barrel section and the extension barrel section is not in a light-shielding state; The second signal is generated when there is liquid medicine in the syringe and the connection between the extension tube section and the needle section is not in a light-shielding state; a third detector is arranged on the base, used to detect the syringe and the medicine bottle to obtain the position information; and an automatic medicine extraction device is arranged on one side of the base, comprising: a box body, having a working surface, and a first sliding hole and a second sliding hole are opened on the working surface, the second sliding hole is located above the first sliding hole and is arranged in a straight line with the first sliding hole; a power assembly is arranged on the The box includes a moving part and a power source, the power source is arranged in the box, one end of the moving part is connected to the power source, and the other end passes through the first sliding hole and is located outside the box, and the end position of the moving part outside the box has a latch part, the latch part is a columnar structure and has a first surface and a second surface vertically adjacent to each other, a first latch groove is opened on the first surface, a second latch groove is opened on the second surface, and the first latch groove and the second latch groove are connected to each other. interconnected; a first fixing assembly, arranged on the working surface of the box and located on the top side of the power assembly, for fixing the syringe, the first fixing assembly comprises a first fixing body, two first guides and a first stopper, the first fixing body has a first connecting piece and two first extension pieces, the first connecting piece is connected to the box, the first extension pieces are formed by the two ends of the first connecting piece extending obliquely, so that the outer contour of the first fixing body presents a sharp tip The first guide members are respectively pivoted at the ends of the first extension piece connected to the first connecting piece, and each of the first guide members is rotatable with its center as a rotation axis. The first stopper is arranged between the first extension pieces and in front of the first connecting piece. A movable plate is arranged on the working surface of the box body and is located on the top side of the first fixing assembly corresponding to the second sliding hole. A second fixing assembly is arranged on the movable plate to fix the medicine bottle. The second fixing assembly includes a second fixing body, two second guides and a second stopper. The second fixing body has a second connecting piece and two second extension pieces. The second connecting piece is connected to the movable plate. The second extension pieces are formed by obliquely extending the two ends of the second connecting piece, so that the outer contour of the second fixing body is a triangle with an opening at the tip. The second guides are respectively pivoted at the ends of the second extension piece opposite to the ends connected to the second connecting piece, and each second The guide member is in a state of being rotatable with its center as a rotating axis, the second stopper is arranged between the second extension pieces and in front of the second connecting piece; a movable member is arranged in the box body and has a linkage end, the linkage end extends out of the second sliding hole and is connected to the movable plate to drive the movable plate; and a processor is arranged in the box body and is electronically connected to the power assembly, the movable member, the first detector, the second detector and the third detector, the processor includes A calculation processing unit and a driving unit, the calculation processing unit is used to calculate the second displacement distance value according to the position information and calculate the first displacement distance value according to the drug extraction amount, the driving unit is connected to the calculation processing unit by telecommunication, and is used to drive the power component and the movable part according to the first displacement distance value and the second displacement distance value, drive the power component when receiving the first signal and/or the second signal, and drive the power component to move to the initial positioning point. As described in claim 4, the automatic drug extraction mechanism, wherein the box further includes a pair of stabilizing members, the pair of stabilizing members are arranged on opposite sides of the movable plate, the pair of stabilizing members respectively have a convex rib, and the two ends of the movable plate are respectively provided with a slide groove corresponding to the convex rib, and the convex ribs are movably arranged in the slide grooves. The automatic drug extraction mechanism as described in claim 5 further includes a fourth detector, which is disposed on the base and is electrically connected to the processor. The fourth detector is used to capture an image of the connection between the extension tube section and the needle section when the first signal and the second signal are not obtained, and analyze and determine whether the liquid level in the image is lower than the connection between the extension tube section and the needle section. When the liquid level is lower than the connection between the extension tube section and the needle section, a third signal is generated. After the processor obtains the third signal, the driving unit drives the power assembly. The automatic drug extraction mechanism as described in claim 6, wherein the automatic drug extraction device further includes a reference icon located on one side of the first fixed component and the second fixed component; the third detector is an image detector for capturing images of the syringe, the medicine bottle and the reference icon; the calculation processing unit of the processor stores an actual length value corresponding to the reference icon; the calculation processing unit analyzes the images of the syringe, the medicine bottle and the reference icon, extracts a first distance between the syringe needle tip and the mouth of the medicine bottle, and a second distance between the mouth of the medicine bottle and the liquid surface of the medicine, and compares them with a length of the reference icon in the image to obtain a ratio, and then calculates with the actual length value to obtain the second displacement distance value. The automatic drug extraction mechanism as described in claim 7, wherein any of the first extension pieces of the first fixed body is provided with a vertical support rod, and the reference icon is provided on the vertical support rod. The automatic drug extraction mechanism as described in any one of claims 5 to 8, wherein the first guide members respectively include a first shaft and a first guide body, the first shaft is passed through the center of the first guide body and is hinged with the first extension piece, the first guide body is a hollow structure and has a plurality of first arc-shaped protrusions, the first arc-shaped protrusions are arranged around the first shaft; the second guide members respectively include a second shaft and a second guide body, the second shaft is passed through the center of the second guide body and is hinged with the second extension piece, the second guide body is a hollow structure and has a plurality of second arc-shaped protrusions, the second arc-shaped protrusions are arranged around the second shaft. The automatic drug extraction mechanism as described in claim 9, wherein each of the first extension pieces has a first opening on the side opposite to the first connecting piece, the first guide piece is assembled at the first opening and located at the end of the first extension piece, the two ends of the first stopper each have a first folded portion, the two ends of the first stopper pass through the first opening of each of the first extension pieces, and the first folded portions are respectively fixed to the first extension pieces. The outer surface of the first extension piece; each second extension piece has a second opening on the side opposite to the second connecting piece, the second guide is assembled in the second opening and located at the end of the second extension piece, the two ends of the second stopper have a second folded portion respectively, the two ends of the second stopper pass through the second opening of each second extension piece, and the second folded portions are respectively fixed on the outer surface of the second extension pieces.