Automatic sample shaking device

Abstract

The utility model discloses an automatic sample shaking device which comprises a lifting mechanism, a clamping jaw mechanism, a blocking mechanism and a shaking mechanism, the lifting mechanism comprises a straight rail and a lifting sliding block moving on the straight rail, the clamping jaw mechanism comprises a clamping jaw used for clamping and releasing a sample tube, and the clamping jaw is fixed on the lifting sliding block and can move along with the lifting sliding block; the clamping jaw mechanism is fixed on the lifting sliding block, the shaking-up mechanism is fixed on the lifting sliding block and connected with the clamping jaw mechanism and drives the clamping jaw mechanism to swing in a reciprocating mode, and the blocking mechanism comprises an upper blocking piece and a lower blocking piece and is used for driving the clamping jaw to be opened and closed. The overall structure and cost are reduced, and stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an automatic sample shaking device. Background Art

[0002] In vitro diagnosis mainly refers to the detection of human blood, body fluids or other tissues to obtain clinical information. When performing in vitro diagnosis, it is usually necessary to shake the samples and reagents to mix them fully to obtain more accurate test results. Especially in medical testing equipment with a high degree of automation, shaking is a necessary sample pre-treatment process, that is, before sampling, the blood sample must be fully mixed, and the shaking effect will directly affect the accuracy of sample testing. In the prior art, two methods are generally used: manual shaking or equipment shaking. The labor cost of manual shaking is high, and different people have different shaking techniques, the effect consistency is poor, and the efficiency is low. The current shaking device has a complex structure and requires multiple motors to move, clamp the sample tube and shake it, which takes up a large space and has poor stability.

[0003] Therefore, in view of the above technical problems, it is necessary to provide a sample automatic shaking device with a simplified structure.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a sample automatic shaking device, which has a simplified structure, occupies less space and has higher stability.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a sample automatic shaking device, including a lifting mechanism, a clamping claw mechanism, a blocking mechanism and a shaking mechanism, wherein the lifting mechanism includes a straight rail and a lifting slider moving on the straight rail; the clamping claw mechanism is used to clamp and release the sample tube, including a fixed block, a clamping claw reset member and a clamping claw, the fixed block is rotatably set on the lifting slider and can move with the lifting slider, the clamping claw includes two clamping claw members at one end of which are respectively pivotally set on the fixed block, the other end of the clamping claw member is a clamping part for clamping the sample tube, the fixed block includes a baffle, the clamping claw reset member includes a clamping claw reset rod, a disk fixed to one end of the clamping claw reset rod and having a diameter larger than the diameter of the clamping claw reset rod, and two driving arms protruding from both sides of the clamping claw reset rod and extending to the outside of the clamping claw respectively, the clamping claw The reset rod is arranged between the two clamping jaws, the driving arm is respectively limited between the baffle plate and the clamping jaws, and the disc is located between the two clamping jaws; the blocking mechanism includes an upper blocking member fixed to the straight rail and located above the clamping jaw mechanism, and a lower blocking member arranged below the clamping jaw mechanism; a shaking mechanism is fixed to the lifting slider, and the shaking mechanism is connected to and drives the clamping jaw mechanism to swing back and forth; when the clamping jaw mechanism moves toward one end of the upper blocking member along with the lifting slider, the upper blocking member contacts and blocks the clamping jaw reset rod from continuing to move, and the driving arm contacts and squeezes the two clamping jaws to make the two clamping parts approach each other; when the clamping jaw mechanism moves toward one end of the lower blocking member along with the lifting slider, the lower blocking member contacts and blocks the clamping jaw reset rod from continuing to move, and the disc contacts and squeezes the two clamping jaws to make the two clamping ends move away from each other.

[0007] In one or more embodiments of the present invention, an extension block is provided on the straight rail, the upper blocking member is a lifting and resetting rod connected to the extension block and protruding downward, and the lower blocking member is a sample tube.

[0008] In one or more embodiments of the present utility model, the clamping mechanism further includes an L-shaped stopper, which includes a fixed plate and the stopper, the two clamping jaws are rotatably disposed on the fixed plate, and the clamping jaw reset rod is passed through the baffle.

[0009] In one or more embodiments of the utility model, an annular groove is provided on the clamping jaw reset rod, the block is provided with a first channel for the clamping jaw reset rod to pass through, and second channels connected to the first channel are provided on both sides of the block, each of the second channels is provided with a ball plunger, and the ball head of each ball plunger extends into the first channel. When the ball head is embedded in the groove, the distance between the two clamping parts is minimized.

[0010] In one or more embodiments of the present invention, each of the clamping jaws further comprises a contact portion which forms an obtuse angle with the clamping portion, one end of the contact portion is pivotally disposed on the fixed block, and the contact portion can respectively contact the disc and the drive arm on the same side.

[0011] In one or more embodiments of the present invention, each of the driving arms includes an inclined contact surface, which is configured to completely fit the outer wall of the contact portion on the clamping jaw member on the same side when the ball head is embedded in the groove, and / or an elastic clip is fixed on each clamping portion.

[0012] In one or more embodiments of the present invention, the fixing block is a U-shaped fixing block, including a bottom plate and two side plates, the bottom plate is rotatably disposed on the lifting slider, and the stop block is fixed to the two side plates.

[0013] In one or more embodiments of the utility model, the automatic sample shaking device also includes a translation mechanism, which includes a translation motor, a translation block, a translation screw, a translation guide rail and the lifting and resetting rod. The translation guide rail is formed on the extension block, the translation block supports and moves on the translation guide rail, the translation screw is passed through the translation block and meshed with the translation block, the two side plates are respectively provided with guide grooves perpendicular to the moving direction of the lifting slider, and guide columns extending into the guide grooves are respectively provided on both sides of the block. The lifting and resetting rod is connected to the translation block and is provided with a socket that can accommodate part of the clamping claw reset rod. The translation motor is connected to and drives the translation screw to rotate, so as to drive the translation block to move along the direction of the translation screw.

[0014] In one or more embodiments of the present utility model, the lifting mechanism also includes a lifting motor and a screw rod, the lifting motor is fixed to the other end of the straight rail, the screw rod is passed through the lifting slider and meshed with it, and the lifting motor is connected to and drives the screw rod to rotate to drive the lifting slider to move.

[0015] In one or more embodiments of the utility model, the shaking mechanism includes a support plate, a shaking motor fixed to the support plate, and a gear group that is meshed and rotatably arranged on the support plate one by one, the support plate is fixed to the lifting slider, and the gear group includes at least a first gear fixed to the shaking motor, and a second gear that remains relatively stationary with the fixed block.

[0016] Compared with the prior art, the sample shaking device of the utility model can open and close the jaws during the up and down movement, thereby eliminating the jaw motor, reducing the total number of motors, simplifying the overall structure, reducing the overall cost, and improving the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of an automatic sample shaking device in one embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of a clamping mechanism in one embodiment of the utility model;

[0020] Figure 3 An exploded view of a clamping mechanism in one embodiment of the utility model;

[0021] Figure 4 A schematic diagram of a shaking mechanism in one embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of a translation mechanism in one embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of a lifting mechanism in one embodiment of the utility model.

[0024] Description of main reference numerals:

[0025] 100-sample automatic shaking device, 10-lifting mechanism, 11-lifting slider, 12-straight rail, 13-lifting motor, 14-screw, 20-claw mechanism, 21-fixed block, 211-guide groove, 22-claw reset member, 221-claw reset rod, 222-driving arm, 223-disc, 224-groove, 23-claw member, 231-clamping part, 232-contact part, 24-block, 241-baffle, 2411-first pass Channel, 2412-second channel, 242-fixed plate, 243-guide column, 25-clamp, 26-ball plunger, 261-ball head, 30-shaking mechanism, 31-shaking motor, 32-first gear, 33-second gear, 34-third gear, 35-support plate, 40-translation mechanism, 41-translation motor, 42-translation block, 43-translation screw, 44-lifting reset rod, 441-jack, 45-translation guide rail, 46-extension block. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] like Figure 1-6 As shown, the automatic sample shaking device 100 in one embodiment of the utility model comprises a lifting mechanism 10, a clamping mechanism 20 and a shaking mechanism 30. The lifting mechanism 10 comprises a straight rail 12 and a lifting slider 11 that can move up and down on the straight rail 12. The clamping mechanism 20 and the shaking mechanism 30 are both connected to the lifting slider 11 so as to move up and down with the movement of the lifting slider 11. The clamping mechanism 20 is used to clamp and release the sample tube. The shaking mechanism 30 is connected to and drives the clamping mechanism 20 to swing back and forth so that the sample in the sample tube is evenly mixed.

[0028] In this embodiment, the clamp mechanism 20 includes a fixed block 21, a clamp reset member 22 and a clamp (composed of two clamp members 23). The fixed block 21 is pivotally disposed on the lifting slider 11, and the fixed block 21 includes a baffle 241. Two clamp members 23 are pivotally disposed on the fixed block 21 and are located below the baffle 241. The end of each clamp member 23 is a clamping portion 231 that directly contacts and clamps the sample tube. The clamp members 23 can pivot around the fixed block 21 so as to move closer to and away from each other to clamp and release the sample tube.

[0029] The jaw reset member 22 includes a jaw reset rod 221, a driving arm 222 and a disc 223. The driving arm 222 extends on both sides of the jaw reset rod 221. The two driving arms 222 can move between the jaw member 23 and the baffle 241 and extend to both sides of the two jaw members 23 respectively. The disc 223 is fixed to the end of the jaw reset rod 221 and is located between the two jaw members 23.

[0030] An upper blocking member and a lower blocking member are respectively provided on the upper and lower sides of the clamp mechanism 20, and the two are respectively coaxial with the clamp reset rod 221. When the clamp mechanism 20 moves upward, the upper end of the clamp reset rod 221 touches the upper blocking member and is blocked by it, and the lifting slider 11 drives the fixed block 21 and the clamp member 23 to continue to move upward, during which the driving arm 222 contacts and squeezes the two clamp members 223 respectively so that the clamping parts 231 at the ends thereof are close to each other; when the clamp mechanism 20 moves downward, the disc 223 contacts and is blocked by the lower blocking member, and the lifting slider 11 drives the fixed block 21 and the clamp member 23 to continue to move downward, during which the disc 223 contacts and squeezes the inner side wall of the clamp member 223 so that the clamp member 223 rotates to both sides respectively, and the clamping parts 231 at the ends of the clamp member 223 are away from each other.

[0031] The traditional shaking mechanism either uses a motor-driven method to clamp and release the sample tube, or fixes the clamping claw and uses its own elasticity to clamp and release the sample tube. The former has a high overall cost and structural complexity, while the latter has poor adaptability to sample tubes of different specifications, and the disassembly and assembly process usually requires manual assistance, and the detection efficiency is low. The automatic sample shaking device 100 in this embodiment cancels the clamping motor (or other power device), and simply relies on the movement process of the clamping claw mechanism 20 itself to realize the clamping claws 23 approaching and moving away from each other, thereby realizing the clamping and release of the sample tube, freeing up manpower, making the structure simpler and more flexible to use.

[0032] In this embodiment, the upper blocking member is a lifting and resetting rod 44 fixed to the end of the straight rail 12, and an extension block 46 protrudes vertically from the end of the straight rail 12. The lifting and resetting rod 44 protrudes downward from the extension block 46, and the lower blocking member is a sample tube.

[0033] In this embodiment, the clamp mechanism 20 further includes an L-shaped stopper 24, a stopper 241 is formed on one side of the stopper 24, and is perpendicular to the moving direction of the clamp reset rod 221. The stopper 241 has a hole in the middle for the clamp reset rod 221 to pass through, and blocks the clamp reset rod 221 during its upward movement to prevent it from excessive movement. The other side of the stopper 24 is a fixing plate 242, which is used to provide a mounting surface for the clamp member 23.

[0034] like Figure 3As shown, an annular groove 224 is provided in the middle of the jaw reset rod 221, which is located above the driving arm 222. A first channel 2411 is provided in the longitudinal direction on the baffle 241, and second channels 2412 connected to the first channel 2411 are provided on both sides. The jaw reset rod 221 is passed through the first channel 2411, and a ball plunger 26 is provided in each of the two second channels 2412, and the end of the ball plunger 26 has an axially retractable ball head 261. In this embodiment, the ball plunger 26 is fixed in the second channel 2412 by threaded engagement, and the end of the ball plunger 26 extends to the connection between the second channel 2412 and the first channel 2411, and the ball head 261 at the end extends into the first channel 2411. When the groove 224 and the second channel 2412 are in the same straight line, the ball head 261 is embedded in the groove 224 to fix the clamping jaw resetting member 22 at this position. In the present embodiment, this position corresponds to the minimum distance between the two clamping parts 231. At this time, the clamping jaw is in a closed state for clamping the sample tube.

[0035] Due to the resistance of the ball head 261, the clamping claw reset member 22 can be kept in this position before being subjected to a large driving force, so that the clamping force on the sample tube can be continuously maintained to prevent the clamping claw reset rod 221 from moving upward, causing the clamping claw to open and then causing the sample tube to fall. Only when the sample tube is placed in the sample holder and the lifting slider 11 continues to move downward, the ball head 261 is axially squeezed into the main body of the ball head plunger 26, and the clamping claw reset rod 221 loses its vertical force. The clamping claw reset rod 221 can drive the driving arm 222 and the disc 223 to move upward, and then the disc 223 contacts and squeezes the two clamping claws 23 to make the clamping parts 231 of the two move away from each other, and the clamping force acting on the sample tube disappears, thereby releasing the sample tube.

[0036] In this embodiment, each clamping jaw 23 is a two-section structure, which is a clamping portion 231 at the bottom for clamping the sample tube and a contact portion 232 at the top, and the two portions are at an obtuse angle. The end of the contact portion 232 is pivotally disposed on the fixing plate 242, and its inner and outer side walls are respectively in contact with and pressed against the disk 223 and the driving arm 221, while the clamping portion 231 does not contact the disk 223 and the driving arm 222. Due to the angle, the clamping portions 231 of the two clamping jaws 23 can be in a parallel state, and the disk 223 presses the inner side wall of the contact portion 232 without contacting the clamping portion 231, so that the two clamping portions 231 are moved away from each other to release the sample tube.

[0037] Preferably, the portion of the driving arm 222 that acts on the contact portion 232 is an inclined surface, and the inclined surface is configured to completely fit with the outer wall of the contact portion 232 when the ball head 261 is embedded in the groove 224, so that the contact and force-bearing area is maximized. At this time, if only the force acting on the clamping portion 231 is relied upon to rotate the clamping jaw 23 and push the driving arm 222 upward, a greater force is required. Therefore, such a setting can greatly improve the clamping effect of the clamping jaw 23 in this state, and prevent the sample tube from sliding off.

[0038] Preferably, an elastic clip 25 is fixed to the clamping portion 231 of each clamping jaw 23, so as to increase the clamping area and effect of the sample tube and avoid crushing the sample tube due to rigid contact.

[0039] like Figure 3 As shown, the fixing block 21 is U-shaped, and includes a bottom plate and side plates on both sides, wherein the bottom plate is rotatably disposed on the lifting slider 11, and the stopper 24 is fixed on the side plates.

[0040] Preferably, the sample automatic shaking device 100 further includes a translation mechanism 40, which is used to adjust the horizontal position of the clamp mechanism 20 when shaking a plurality of sample tubes distributed in two dimensions, so as to improve flexibility. Specifically, the translation mechanism 40 includes a translation motor 41, a translation block 42, a translation screw 43, a lifting and resetting rod 44, a translation guide rail 45 and an extension block 46. The extension block 46 is vertically fixed to the end of the straight rail 12, the translation guide rail 45 is formed at the bottom of the extension block 46, and the translation block 42 is provided with a guide groove matched with the translation guide rail, so that the translation block 42 is supported on the translation guide rail 45 and can move along the translation guide rail 45. The screw 43 is inserted into the translation block 42 and meshed with the translation block 42, and one end of the screw 43 is connected to the output end of the translation motor 41. At the same time, guide grooves 211 parallel to the translation screw rod 42 are respectively provided on the side plates of the fixed block 21, and guide posts 243 extending into the guide grooves 211 are respectively protruded from both ends of the stopper 24. The lifting and resetting rod 44 is fixed to the translation block 42, and the lifting and resetting rod 44 is provided with a socket 441 capable of accommodating the clamping claw resetting rod 221.

[0041] When the clamping jaw reset rod 221 moves upward and is inserted into the insertion hole 441, the translation motor 41 operates, the translation screw 43 rotates, and the translation block 42 drives the clamping jaw reset rod 221 and the clamping jaw mechanism 20 to move in the horizontal plane under the action of the thread.

[0042] Preferably, two parallel guide grooves 211 are respectively provided on the side plates of the fixed block 21 to improve the stability of the stopper 24 during translation. It is conceivable that the specific number of the guide grooves 211 can be determined according to actual conditions (such as the size of the side plates, the width of the guide grooves 211, etc.), and this embodiment does not limit this.

[0043] In this embodiment, the lifting mechanism 10 further includes a lifting motor 13 and a screw rod 14. The lifting motor 13 is fixed to the other end of the straight rail 12. One end of the screw rod 14 is fixed to the output end of the lifting motor 13 and is arranged parallel to the upper side of the straight rail 12. The screw rod 14 is passed through the lifting slider 11 and is threadedly engaged with the lifting slider 11. The lifting slider 11 is simultaneously limited in the straight rail 12 and can move in the straight rail 12, while preventing the lifting slider 11 from rotating with the screw rod 14. Therefore, when the lifting motor 13 is running, the lifting slider 11 drives the clamping mechanism 20 and the shaking mechanism 30 to move along the screw rod 14 under the action of the thread.

[0044] like Figure 4 As shown, the shaking mechanism 30 includes a shaking motor 31, a support plate 35 and a gear set. The support plate 35 and the lifting slider 11 are detachably fixed. The shaking motor 31 is fixed on the support plate 35. The gear set is meshed one by one and rotatably arranged on the support plate 35. The gear set includes at least two gears, a first gear 32 and a second gear 33. The first gear 32 is fixed on the output shaft of the shaking motor 31, and the second gear 33 rotates on the support plate 35 while remaining relatively stationary with the fixed plate 21.

[0045] In this embodiment, a third gear 34 is further provided between the first gear 32 and the second gear 33 to shorten the distance therebetween, so that the first gear 32 and the second gear 33 can be miniaturized to avoid affecting the overall operation.

[0046] Since the automatic sample shaking device 100 in this embodiment is used to shake the sample tube to mix the internal sample evenly, and the diameter of the sample tube is relatively small, the shaking process cannot be too violent to prevent the internal sample from overflowing. At the same time, since the output of the motor is generally faster, in this embodiment, the first gear 32 is smaller than the second gear 33, and the second gear 33 only rotates a part of the angle when the shaking motor 31 outputs one circle. Gears of different sizes form a differential effect, so the swing of the clamping mechanism 20 is relatively gentle without replacing the shaking motor 31. At the same time, when adjusting the output of the shaking motor 31, the swing amplitude of the clamping mechanism 20 changes relatively smoothly and not abruptly, and the stability is relatively high.

[0047] The automatic sample shaking device 100 in this embodiment is further described here in conjunction with specific usage scenarios.

[0048] In the initial state, the shaking motor 31 drives the clamping mechanism 20 to be in a vertical state, and the lifting motor 13 operates to move the lifting slider 11 up to the highest reset point. At this time, the ball head 261 is located in the groove 224, and the clamping jaw 23 is in a closed state.

[0049] After the sample tray transfers the sample tube to be shaken to the bottom of the clamping claw 23, the lifting motor 13 reverses, the lifting slider 11 moves down, the clamping claw 23 touches the sample tube cap and continues to move down, the sample tube is squeezed between the clamping claws 23, and the sample tube is fixed because the clamping piece 25 is elastic. Then the lifting motor 13 is operated, the sample tube is lifted to the upper open swingable position, the shaking motor 31 is operated, and the sample tube swings back and forth.

[0050] After the sample is mixed evenly, the shaking motor 31 swings the sample tube to a vertical position, and then the lifting motor 13 operates, the lifting slider 11 moves down, and the sample tube is placed in the sample tray. Then the lifting slider 11 continues to move down, the sample tube pushes up the clamping claw reset rod 221, the driving arm 222 moves away from the clamping claw member 23, and the clamping claw members 23 move away from each other and release the sample tube. Then the clamping claw mechanism 20 moves up with the lifting slider 11 and resets, waiting for the next clamping and shaking operation.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sample automatic shaking device, characterized in that: include: A lifting mechanism, comprising a straight rail and a lifting slider moving on the straight rail; The clamping mechanism is used to clamp and release the sample tube, including a fixed block, a clamping jaw reset member and a clamping jaw, wherein the fixed block is rotatably arranged on the lifting slide block and can move with the lifting slide block, the clamping jaw includes two clamping jaw members at one end of which are respectively pivotally arranged on the fixed block, and the other end of the clamping jaw member is a clamping portion for clamping the sample tube, the fixed block includes a baffle plate, the clamping jaw reset member includes a clamping jaw reset rod, a disk fixed to one end of the clamping jaw reset rod and having a diameter larger than the diameter of the clamping jaw reset rod, and two driving arms protruding from both sides of the clamping jaw reset rod and respectively extending to the outside of the clamping jaw, the clamping jaw reset rod is arranged between the two clamping jaw members, the driving arms are respectively limited between the baffle plate and the clamping jaw, and the disk is located between the two clamping jaw members; A blocking mechanism, comprising an upper blocking member fixed to the straight rail and located above the clamping mechanism, and a lower blocking member arranged below the clamping mechanism; as well as A shaking mechanism is fixed to the lifting slider, and the shaking mechanism is connected to and drives the clamping mechanism to swing back and forth; in When the clamping mechanism moves toward one end of the upper blocking member along with the lifting slider, the upper blocking member contacts and blocks the clamping reset rod from continuing to move, and the driving arm contacts and squeezes the two clamping members to make the two clamping parts approach each other; when the clamping mechanism moves toward one end of the lower blocking member along with the lifting slider, the lower blocking member contacts and blocks the clamping reset rod from continuing to move, and the disc contacts and squeezes the two clamping members to make the two clamping ends move away from each other.

2. The automatic sample shaking device according to claim 1, characterized in that: An extension block is arranged on the straight rail, the upper blocking member is a lifting and resetting rod connected to the extension block and protruding downward, and the lower blocking member is a sample tube.

3. The automatic sample shaking device according to claim 2, characterized in that: The clamping jaw mechanism also includes an L-shaped stopper, which includes a fixed plate and the stopper, the two clamping jaws are rotatably arranged on the fixed plate, and the clamping jaw reset rod is penetrated through the stopper.

4. The automatic sample shaking device according to claim 3, characterized in that: The clamping jaw reset rod is provided with an annular groove, the block is provided with a first channel for the clamping jaw reset rod to pass through, and the block is provided with second channels connected to the first channel on both sides, each of the second channels is provided with a ball plunger, and the ball head of each ball plunger extends into the first channel. When the ball head is embedded in the groove, the distance between the two clamping parts is minimized.

5. The automatic sample shaking device according to claim 4, characterized in that: Each of the clamping jaws also includes a contact portion which forms an obtuse angle with the clamping portion, one end of the contact portion is pivotally arranged on the fixing block, and the contact portion can respectively contact the disk and the driving arm on the same side.

6. The automatic sample shaking device according to claim 5, characterized in that: Each of the driving arms comprises an inclined contact surface, which is configured so that when the ball head is embedded in the groove, the contact surface is completely fitted with the outer side wall of the contact portion on the same side clamping jaw member, and / or an elastic clip is fixed to each clamping portion.

7. The automatic sample shaking device according to claim 3, characterized in that: The fixing block is a U-shaped fixing block, comprising a bottom plate and two side plates, the bottom plate is rotatably arranged on the lifting sliding block, and the stopper is fixed to the two side plates.

8. The automatic sample shaking device according to claim 7, characterized in that: The camming mechanism further comprises a translation mechanism, which comprises a translation motor, a translation block, a translation screw, a translation guide rail and the lifting and resetting rod. The translation guide rail is formed on the extension block, the translation block supports and moves on the translation guide rail, the translation screw is passed through the translation block and meshed with the translation block, the two side plates are respectively provided with guide grooves perpendicular to the moving direction of the lifting slider, guide columns extending into the guide grooves are respectively provided on both sides of the block, the lifting and resetting rod is connected to the translation block and is provided with a socket capable of accommodating part of the clamping claw reset rod, the translation motor is connected to and drives the translation screw to rotate, so as to drive the translation block to move along the direction of the translation screw.

9. The automatic sample shaking device according to claim 8, characterized in that: The lifting mechanism also includes a lifting motor and a screw rod. The lifting motor is fixed to the other end of the straight rail. The screw rod passes through the lifting slider and engages with it. The lifting motor is connected to and drives the screw rod to rotate, so as to drive the lifting slider to move.

10. The automatic sample shaking device according to claim 1, characterized in that: The shaking mechanism includes a support plate, a shaking motor fixed to the support plate, and a gear set that is meshed and rotatably arranged on the support plate one by one, the support plate is fixed to the lifting slider, and the gear set includes at least a first gear fixed to the shaking motor, and a second gear that remains relatively stationary with the fixed block.

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