CN220625870U - Trace medicament sampling equipment - Google Patents

Abstract

The utility model relates to the technical field of sampling equipment, and discloses micro-medicament sampling equipment, which comprises the following components: the bottom of the sampling tube is provided with a sampling head, the top of the sampling tube is provided with a baffle, a piston is arranged in the sampling head, the top of the piston is provided with a pull rod penetrating out of the baffle, a supporting plate is arranged on the pull rod in the sampling tube, a first elastic piece is arranged between the supporting plate and the baffle, the side wall of the pull rod is provided with a rack, and the top of the sampling tube is provided with a limiting mechanism; the driving plate is hinged on the sampling tube, a second elastic piece is connected between the driving plate and the side wall of the sampling tube, the driven plate is hinged at the free end of the driving plate, a third elastic piece is arranged between the driven plate and the driving plate, a stop block is arranged on the inner side of the driving plate, which is close to the hinged position of the driven plate, a limit tooth is arranged on the driven plate, and a release plate is fixed at one end of the driving plate, which is far away from the driven plate, and the device can carry out one-hand operation through a drawing part and a limit mechanism, so that the operation convenience of the sampler is improved, the sampling precision is improved, the reliability of the whole device is high, and the cost is low.

Description

Trace medicament sampling equipment

Technical Field

The utility model relates to the technical field of sampling equipment, in particular to micro-medicament sampling equipment.

Background

Pharmacy is a healthcare industry connecting health science and chemical science, and it takes responsibility for ensuring safe and effective use of drugs; the pharmaceutical main research comprises the steps of medicine source, processing, property, action, analysis, identification, preparation, production, storage, searching (including synthesis) of new medicines and the like; the main task is to continuously provide more effective medicines and improve the quality of the medicines, ensure the medication safety and enable patients to treat or cure diseases in a mode of minimum injury and maximum benefit; the medicine is prepared into a proper dosage form, so that the preparation with excellent quality can meet the requirements of medical and health work. In the process of preparing and researching medicines, the dosage of each link of reaction is accurately controlled, and trace medicines are accurately extracted according to an experiment preset flow, so that the method is one of key problems which are required to be solved by a laboratory and is a key link for determining an experiment result

At present, when a pharmaceutical experiment is carried out for sampling a trace amount of medicament, a mode of adding a dropper by an air bag or adding an outer sleeve of a needle cylinder by a piston is adopted for sampling, however, when the two sampling devices are actually used, the mode of adding the dropper by the air bag is found, the air bag cannot regulate the control of air flow, the sample amount sucked into the dropper cannot be accurately controlled, and the sampling precision is poor. The sampler formed by the piston and the needle cylinder jacket requires two hands to perform sampling operation when sampling operation is actually performed, the needle cylinder is stabilized by one hand, the piston is pulled by the other hand, the operation mode is very inconvenient, the sampling amount is difficult to control, the sampling precision is poor, the accuracy of a detection result is easily affected by errors of the sampling amount, and the medicament bottle cannot be supported in the sampling process, so that the medicament bottle is very easy to topple. Although some high-precision pipette guns are also on the market, the cost is very high, and a large amount of equipment is high. For this purpose, we propose a micro-medicament sampling device.

Disclosure of Invention

The utility model provides a trace medicament sampling device, which improves the operation convenience and sampling precision of a piston type sampler by arranging a drawing and discharging component capable of being operated by one hand and a limiting mechanism, and has the advantages of pure mechanical structure, high reliability and low cost so as to solve the defects in the prior art.

The technical scheme of the utility model is as follows: a micro-drug sampling device comprising:

the sampling tube is provided with a sampling head at the bottom, a baffle at the top and a piston at the inside, a pull rod penetrating out of the baffle is arranged at the top of the piston, a supporting plate is arranged on the pull rod in the sampling tube, a first elastic piece is arranged between the supporting plate and the baffle, a rack with downward teeth is arranged on the side wall of the pull rod, and a limiting mechanism is arranged at the top of the sampling tube;

a drawer component comprising: the automatic sampling device comprises a driving plate, a driven plate and a release plate, wherein the driving plate is hinged to the side wall of the sampling tube, a second elastic piece is connected between the driving plate and the side wall of the sampling tube, the driven plate is hinged to the free end of the driving plate, a third elastic piece is arranged between the driven plate and the driving plate, a stop block is arranged on the inner side of the driving plate, which is close to the hinged position of the driven plate, the free end of the driven plate is provided with limiting teeth with teeth matched with racks, and the release plate is obliquely arranged at one end, far away from the driven plate, of the driving plate.

Preferably, the limiting mechanism includes: semicircle board, threaded rod and limit baffle, the semicircle board sets up the top at the sampling tube, and semicircle inboard is kept away from sampling tube one side and is equipped with the fixed block, and the side of semicircle board is equipped with the scale mark, the threaded rod rotates to be connected between semicircle inboard baffle and fixed block, the fixed block is worn out to the tip of threaded rod, and its end of wearing out is equipped with the knob, limit baffle sets up in the semicircle board, is equipped with on the limit baffle with threaded rod matched with screw hole, the tip of pull rod is equipped with limit baffle matched with clamp plate.

Preferably, the pull rod is a square rod, a square hole for the pull rod to pass through is formed in the baffle, one side, far away from a rack on the pull rod, of the inner wall of the square hole is rotationally connected with a columnar roller, and the columnar roller is attached to the side wall of the pull rod.

Preferably, one end of the driven plate, which is far away from the driving plate, is hinged with a limiting plate, one side of the limiting plate, which is far away from the hinged end, is provided with limiting teeth which are matched with the racks and are inclined upwards, and a limiting block is arranged between one side of the limiting plate, which is far away from the limiting teeth, and the driven plate.

Preferably, the lateral wall of sampling head is last to be equipped with the bar hole, and the inside wall of sampling head is equipped with the draw-in groove corresponding with the bar hole, the downthehole cardboard that installs of bar, be equipped with the rubber layer on the lateral wall of cardboard, the tip of the outer cardboard of sampling head is equipped with the push pedal, the tip detachable of sampling head is connected with the capillary sampling tube.

Preferably, a sliding groove is formed in the semicircular plate, a ball groove is formed in the bottom of the limiting baffle, and balls matched with the sliding groove are installed in the ball groove.

Preferably, one side of the limiting plate, which is far away from the limiting teeth, is provided with two connectors, a connecting rod is arranged between the connectors, one end of the driven plate, which is far away from the driving plate, is provided with a first connecting hole for the connecting rod to pass through, the middle part of the connecting hole on the driven plate is provided with a connecting groove, and a torsion spring is arranged on the connecting rod in the connecting groove.

Preferably, two mounting plates are symmetrically arranged on the side wall of the sampling tube, the driving plate is arc-shaped and hinged between the mounting plates, and a protection pad is arranged on the outer wall of the driving plate.

Preferably, the first elastic piece is a compression spring sleeved on the pull rod, the second elastic piece is a compression spring, and the third elastic piece is an extension spring.

Preferably, the bottom of the inner cavity of the sampling tube is conical, the bottom of the piston is conical matched with the bottom of the inner cavity of the sampling tube, and the piston is made of rubber.

The utility model has the beneficial effects that:

when the micro-medicament sampling equipment is used, firstly, after the limiting mechanism is regulated according to the requirement of the sampling amount, sampling operation is carried out, a medicament bottle is supported by one hand during sampling, the sampling tube is held by the other hand, the capillary sampling tube is gradually led to extend below the liquid level in the sampling bottle, then the driving plate is held by the hand, at the moment, the driving plate drives the limiting plate end of the driven plate to move upwards, and the limiting teeth arranged on the limiting plate on the driven plate are meshed with the limiting teeth on the pull rod so as to pull the pull rod to move upwards, and the piston is pulled so as to complete the suction of the medicament. The driving plate can be repeatedly loosened and pressed until the pull rod is limited by the limiting mechanism, namely, the sampling work of liquid medicine is finished, when the medicine in the sampling tube needs to be discharged, the hand holding the sampling tube moves downwards to press the release plate to overcome the tension of the second elastic piece, so that the release plate continues to be opened, until the limiting teeth on the limiting plate release the limit of the pull rod, the pull rod is under the action of the first elastic piece, and the piston is slowly pushed to move downwards through the pull rod under the action of the friction force on the inner wall of the sampling tube by the piston, so that the trace medicine is slowly discharged from the sampling tube to a corresponding experimental apparatus. This trace medicament sampling equipment compares in the current gasbag with the burette or the piston adds the sampling mode of cylinder overcoat, and the precision of sample is higher to easy operation is convenient, can accomplish the suction work of medicament by one hand, has avoided the condition that the medicament bottle emptys to take place to guarantee the security of experiment, and whole equipment is pure mechanical structure, compares in the high pipette of current market price rifle, and the reliability is high, low in production cost is fit for carrying out a large amount of equipment in the experiment. And this trace medicament sampling equipment is equipped with the cardboard and can guarantee not take place the water clock in-process that the liquid was removed, still is equipped with pull rod matched with columnar roller and with semicircle board matched with ball groove, guaranteed that whole device operation is smooth, simple operation.

Drawings

FIG. 1 is a schematic view of a front cross-sectional structure of the present utility model;

FIG. 2 is a schematic view of a schematic cross-sectional front view of a drainage component of the present utility model;

FIG. 3 is a schematic view showing the detailed structure of the front view A of the present utility model;

FIG. 4 is a schematic top cross-sectional view of a sampling tube according to the present utility model;

FIG. 5 is a schematic view showing the detailed construction of the present utility model at the front view B;

FIG. 6 is a schematic side view of the present utility model;

fig. 7 is a schematic diagram showing a detailed structure of the present utility model in side view C.

Reference numerals illustrate:

1. a sampling tube; 11. a sampling head; 111. a bar-shaped hole; 112. a clamping plate; 12. a baffle; 121. square holes; 122. a columnar roller; 13. a pull rod; 131. a support plate; 132. a first elastic member; 133. a rack; 14. a mounting plate; 2. a drawing-out part; 21. an active plate; 211. a second elastic member; 22. a driven plate; 221. a third elastic member; 222. a stop block; 223. limit teeth; 23. a release plate; 24. a limiting plate; 241. a limiting block; 3. a limiting mechanism; 31. a semicircular plate; 311. a chute; 32. a threaded rod; 33. a limit baffle; 331. and (3) rolling balls.

Detailed Description

One embodiment of the present utility model will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present utility model is not limited by the embodiment.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Referring to fig. 1 to 7, a micro-drug sampling device includes:

the sampling tube 1 is provided with a sampling head 11 at the bottom, a baffle 12 at the top and a piston at the inside, a pull rod 13 penetrating out of the baffle 12 is arranged at the top of the piston, a supporting plate 131 is arranged on the pull rod 13 in the sampling tube 1, a first elastic piece 132 is arranged between the supporting plate 131 and the baffle 12, a rack 133 with downward teeth is arranged on the side wall of the pull rod 13, a limiting mechanism 3 is also arranged at the top of the sampling tube 1, and the limiting mechanism 3 limits the movable range of the pull rod 13, so that the sampling amount of the medicament sampling device can be adjusted;

the drawing and discharging part 2 comprises: the driving plate 21, the driven plate 22 and the release plate 23, the driving plate 21 articulates on the lateral wall of sampling tube 1, is connected with the second elastic component 211 between the lateral wall of driving plate 21 and sampling tube 1, driven plate 22 articulates the free end at driving plate 21, is equipped with third elastic component 221 between driven plate 22 and the driving plate 21, and driven plate 22 articulated department is close to in the driving plate 21 inboard is equipped with dog 222, the setting of dog 222 has avoided driven plate 22 excessively to buckle under the effect of third elastic component 221 for spacing tooth 223 can not carry out complete engagement with rack 133, and the free end of driven plate 22 is equipped with the spacing tooth 223 upwards of tooth slope with rack 133, release plate 23 is to keeping away from sampling tube 1 one side slope setting in the one end of keeping away from driven plate 22 of driving plate 21, and spacing tooth 223 can laminate rack 133 and slide downwards.

Further, the limiting mechanism 3 includes: the semicircular plate 31, the threaded rod 32 and the limit baffle 33, semicircular plate 31 sets up on the top of sampling tube 1, and semicircular plate 31 is interior to keep away from sampling tube 1 one side and is equipped with the fixed block, and semicircular plate 31's side is equipped with the scale mark, the side of scale mark is equipped with the scale value rather than corresponding, and the scale value represents the volume that can suck the medicament in the sampling tube 1 here, threaded rod 32 rotates to be connected between semicircular plate 31 internal baffle 12 and fixed block, the fixed block is worn out to threaded rod 32's tip, and its wearing out end is equipped with the knob, the circumference of knob is equipped with the antiskid line to prevent to take place to skid when rotatory knob, limit baffle 33 sets up in semicircular plate 31, limit baffle 33 is last to be equipped with rather than threaded rod 32 matched with screw hole, pull rod 13's tip is equipped with the clamp plate with limit baffle 33.

Further, the pull rod 13 is a square rod, a square hole 121 through which the pull rod 13 passes is formed in the baffle 12, a cylindrical roller 122 is rotatably connected to one side, away from a rack 133 on the pull rod 13, of the inner wall of the square hole 121, the cylindrical roller 122 is attached to the side wall of the pull rod 13, and due to the fact that the drawing and placing component 2 is used for lifting the pull rod 13, a certain lateral pressure is generated on the pull rod 13 by the driven plate 22, the upward movement of the pull rod 13 is not influenced by the friction force of the side wall of the square hole 121 due to the arrangement of the cylindrical roller 122, and the upward movement is smoother.

Further, the one end of keeping away from initiative board 21 on the slave plate 22 articulates there is limiting plate 24, the one side of keeping away from the articulated end on the limiting plate 24 is equipped with the ascending spacing tooth 223 of tooth slope with rack 133 matched with, the setting of limiting plate 24 can make slave plate 22 keep away from the one end of initiative board 21 and carry out the complete card with rack 113 all the time when up-and-down motion, has guaranteed the stability that pull rod 13 was promoted to the play part 2, is equipped with stopper 241 between the spacing tooth one side of keeping away from of limiting plate 24 and the slave plate, and the setting of stopper 241 has avoided limiting plate 24 to continue the downward rotation, and spacing tooth 223 is difficult to with rack 113 meshing under operating condition.

Further, be equipped with bar hole 111 on the lateral wall of sampling head 11, the inside wall of sampling head 11 is equipped with the draw-in groove corresponding with bar hole 111, install cardboard 112 in the bar hole 111, be equipped with the rubber layer on the lateral wall of cardboard 112, the tip of sampling head 11 outer cardboard 112 is equipped with the push pedal, the tip of sampling head 11 can be dismantled and be connected with capillary sampling tube, the setting of cardboard 112 prevents to take place the water clock at the in-process that shifts and causes the pollution, and influences the accuracy nature of liquid volume.

Further, a sliding groove 311 is formed in the semicircular plate 31, a ball groove is formed in the bottom of the limit baffle 33, a ball 331 matched with the sliding groove 311 is mounted in the ball groove, and the sliding groove 311, the ball groove 311 and the ball 331 are arranged so that the limit baffle 33 slides in the semicircular plate 31 more smoothly after the knob is rotated.

Further, one side of limiting plate 24, which is far away from limiting teeth 223, is provided with two opposite connectors, a connecting rod is arranged between the connectors, one end of driven plate 22, which is far away from driving plate 21, is provided with a first connecting hole for the connecting rod to pass through, the middle position of the connecting hole on driven plate 22 is provided with a connecting groove, a torsion spring is arranged on the connecting rod in the connecting groove, and the setting of the torsion spring can enable limiting plate 223 to be always downwards attached to driven plate 22, so that the cooperation between the driven plate and rack 133 is more compact in the working process.

Further, two mounting plates 14 are symmetrically arranged on the side wall of the sampling tube 1, the driving plate 21 is arc-shaped and hinged between the mounting plates 14, a protection pad is arranged on the outer wall of the driving plate 21, the arc-shaped driving plate 21 is more comfortable to hold, and the arrangement of the protection pad can play a role in preventing slipping and ensure holding comfort.

Further, the first elastic member 132 is a compression spring sleeved on the pull rod 13, the second elastic member 211 is a compression spring, the first elastic member 132 may also be replaced by an elastic telescopic rod disposed between the support plate 131 and the baffle 12, two ends of the second elastic member 211 are respectively hinged between the sampling tube 1 and the driving plate 21, the second elastic member 211 provides a tensile force to the driving plate 21 during actual operation, a certain tensile force is also provided during suction operation, the third elastic member 221 is an extension spring, a gap is usually formed between the rings of the extension spring, and a tensile force is provided between the driving plate 21 and the driven plate 22, and the third elastic member 221 may also be replaced by a torsion spring disposed between the driving plate 21 and the driven plate 22.

Further, sampling tube 1 inner chamber bottom is the toper, and the bottom of piston is the toper with sampling tube 1 inner chamber bottom matched with, conical setting makes the range of sampling tube 1 in earlier stage littleer sample precision higher, has guaranteed to arrange the medicament in the sampling tube 1 totally clean at the in-process of flowing back, and the piston is the rubber material, and the motion of piston has certain frictional force with the lateral wall of sampling tube 1, sampling tube 1 is transparent material, is equipped with the volume scale mark on the sampling tube 1, perhaps is equipped with transparent window on the sampling tube 1, is equipped with the volume scale mark on its transparent window, can regard the scale mark as the reference in actual operation in-process, knows the sample volume constantly, provides the reference for the operation of hand.

The application method of the embodiment comprises the following steps:

the utility model provides a trace medicament sampling device, which is characterized in that when the trace medicament sampling device is used, a capillary sampling tube is firstly arranged on a sampling head, a push plate is pulled outwards to open a clamping plate for plugging the sampling head, a knob is rotated by taking a scale mark on a semicircular plate as a reference according to the medicament amount to be sampled, a threaded rod is driven by the knob to rotate, a limit baffle is driven by the threaded rod to slide in the semicircular plate after rotating, the knob is stopped when the limit baffle slides to a proper scale mark position, and medicament sampling can be carried out. When sampling is carried out, the drug bottle is supported by one hand, the sampling tube is held by the other hand, the capillary sampling tube is led to extend below the liquid level in the sampling bottle gradually, the driving plate is held by the hand, the driving plate drives the limiting plate end of the driven plate to move upwards, the limiting teeth arranged on the limiting plate on the driven plate are meshed with the limiting teeth on the pull rod to pull the pull rod to move upwards, the pull rod moves smoothly under the cooperation of the columnar rollers, and the piston is pulled to complete the suction of the drug.

If sampling medicament trace once pulls and if the clamp plate on the pull rod withstands limit baffle, then accomplish sampling work, draw out the capillary sampling tube from the reagent bottle at this moment, and press the push pedal with one hand, make the cardboard carry out the shutoff with the sampling head, in order to avoid liquid medicine drip leakage, the hand that holds the sampling tube afterwards can relax the pressure to the initiative board, the initiative board opens to a certain extent under the effect of second elastic component, the slave plate is under the effect of third elastic component, its limiting plate end moves downwards, tooth on the limiting plate meshes with rack on the pull rod again, when the medicament in the sampling tube is to be discharged, the pulling push pedal releases the shutoff of cardboard to the sampling head, the hand that holds the sampling tube afterwards moves downwards and presses the release plate and make it continue opening, until the spacing tooth on the limiting plate releases the spacing to the pull rod, the pull rod is under the effect of first elastic component, and because the effect of piston hand sampling tube inner wall friction force, slowly discharges the medicament from the sampling tube to corresponding experimental apparatus in the slow follow sampling tube of pushing piston down.

If sampling medicament is slightly more, once grasp the initiative board and promote the pull rod upward movement through the transmission, when the clamp plate on the pull rod can't withstand limit baffle, can relax the pressure to the initiative board fast this moment, the driven plate can drive the rack down motion on the limit plate along the pull rod under the effect of third elastic component, the pull rod also can be under the effect of first elastic component and receive the slow down motion of piston and sampling tube inner wall frictional force effect this moment, but under the circumstances of quick relaxation and taut initiative board, spacing tooth on the limit plate still can block with the rack, in order to promote the pull rod again, until clamp plate and limit baffle on the pull rod contact, in order to accomplish the suction to the medicament, the same with above-mentioned operation when later use discharge to slightly more medicament can.

The foregoing disclosure is merely illustrative of some embodiments of the utility model, but the embodiments are not limited thereto and variations within the scope of the utility model will be apparent to those skilled in the art.

Claims (10)

1. A micro-drug sampling device, comprising:

the sampling tube (1), the bottom is provided with a sampling head (11), the top is provided with a baffle (12), a piston is arranged in the sampling tube, the top of the piston is provided with a pull rod (13) penetrating out of the baffle (12), a supporting plate (131) is arranged on the pull rod (13) in the sampling tube (1), a first elastic piece (132) is arranged between the supporting plate (131) and the baffle (12), the side wall of the pull rod (13) is provided with a rack (133) with downward teeth, and the top of the sampling tube (1) is provided with a limiting mechanism (3);

a drawing-out part (2) comprising: the automatic sampling device comprises a driving plate (21), a driven plate (22) and a release plate (23), wherein the driving plate (21) is hinged to the side wall of the sampling tube (1), a second elastic piece (211) is connected between the driving plate (21) and the side wall of the sampling tube (1), the driven plate (22) is hinged to the free end of the driving plate (21), a third elastic piece (221) is arranged between the driven plate (22) and the driving plate (21), a stop block (222) is arranged at the position, close to the hinged position, of the driven plate (22) on the inner side of the driving plate (21), the free end of the driven plate (22) is provided with limiting teeth (223) which are matched with racks (133) and are inclined upwards, and the release plate (23) is obliquely arranged at one end, far away from the driven plate (22), of the driving plate (21).

2. A micro-drug sampling device according to claim 1, wherein the limiting mechanism (3) comprises: semicircle board (31), threaded rod (32) and limit baffle (33), semicircle board (31) set up the top at sampling tube (1), and semicircle board (31) are kept away from sampling tube (1) one side and are equipped with the fixed block, and the side of semicircle board (31) is equipped with the scale mark, threaded rod (32) rotate and connect between semicircle board (31) internal baffle (12) and fixed block, the fixed block is worn out to the tip of threaded rod (32), and its end of wearing out is equipped with the knob, limit baffle (33) set up in semicircle board (31), be equipped with on limit baffle (33) with threaded hole of threaded rod (32) matched with, the tip of pull rod (13) be equipped with limit baffle (13) matched with clamp plate.

3. The micro-medicament sampling device according to claim 1, wherein the pull rod (13) is a square rod, the baffle (12) is provided with a square hole (121) for the pull rod (13) to pass through, one side, far away from a rack (133) on the pull rod (13), of the inner wall of the square hole (121) is rotationally connected with a columnar roller (122), and the columnar roller (122) is attached to the side wall of the pull rod (13).

4. A micro-medicament sampling apparatus according to claim 1, wherein a limiting plate (24) is hinged to one end of the driven plate (22) far away from the driving plate (21), a limiting tooth (223) with an upward inclination of teeth matched with the rack (133) is arranged on one side of the limiting plate (24) far away from the hinged end, and a limiting block (241) is arranged between one side of the limiting plate (24) far away from the limiting tooth and the driven plate.

5. The micro-medicament sampling device according to claim 1, wherein a strip-shaped hole (111) is formed in the side wall of the sampling head (11), a clamping groove corresponding to the strip-shaped hole (111) is formed in the inner side wall of the sampling head (11), a clamping plate (112) is installed in the strip-shaped hole (111), a rubber layer is arranged on the side wall of the clamping plate (112), a pushing plate is arranged at the end part of an outer clamping plate (112) of the sampling head (11), and a capillary sampling tube is detachably connected to the end part of the sampling head (11).

6. A micro-medicament sampling apparatus according to claim 2, wherein a chute (311) is provided in the semicircular plate (31), a ball groove is provided at the bottom of the limit baffle (33), and balls (331) matching with the chute (311) are installed in the ball groove.

7. A micro-medicament sampling apparatus according to claim 4, wherein the side of the limiting plate (24) away from the limiting teeth (223) is provided with two connectors, a connecting rod is arranged between the connectors, one end of the driven plate (22) away from the driving plate (21) is provided with a first connecting hole for the connecting rod to pass through, the middle part of the connecting hole of the driven plate (22) is provided with a connecting groove, and a torsion spring is arranged on the connecting rod in the connecting groove.

8. A micro-medicament sampling device according to claim 1, wherein two mounting plates (14) are symmetrically arranged on the side wall of the sampling tube (1), the driving plate (21) is hinged between the mounting plates (14) in an arc shape, and a protective pad is arranged on the outer wall of the driving plate (21).

9. A micro-medicament sampling apparatus according to claim 1, wherein the first elastic member (132) is a compression spring sleeved on the pull rod (13), the second elastic member (211) is a compression spring, and the third elastic member (221) is an extension spring.

10. The micro-medicament sampling device according to claim 1, wherein the bottom of the inner cavity of the sampling tube (1) is conical, the bottom of the piston is conical matched with the bottom of the inner cavity of the sampling tube (1), and the piston is made of rubber.