A device for automatically loading pipette tips into a tip box

Abstract

The present invention discloses a device for automatically loading pipette tips into a tip box, belonging to the technical field of experimental equipment. The device for automatically loading pipette tips into a tip box includes a frame, and a roller device, a conveying device, a tip dispensing device, a tip box moving and positioning device, and a sensing and correcting device arranged on the frame; a roller device is arranged at the feeding end of the conveying device, a tip dispensing device and a tip box moving and positioning device are arranged at the discharging section of the conveying device, and the sensing and correcting device is arranged opposite to the conveying device. The device for automatically loading pipette tips into a tip box according to the present invention can achieve accurate and continuous loading of pipette tips into the tip box, and solves the problem of time and energy consumption of manual loading of pipette tips by R & D personnel or R & D assistant personnel.

Description

Technical Field

[0001] The present invention belongs to the technical field of experimental equipment, and particularly relates to a device for automatically loading pipette tips into a tip box. Background Art

[0002] During the biochemical experiment process, pipette tips are very commonly used experimental consumables. Since a sterile environment is required in many cases in biochemical experiments, loading pipette tips into a tip box for sterilization operation is a common experimental preparation in the laboratory. Due to the frequent need to load pipette tips into the box, it will consume a large amount of time and energy of R & D personnel or auxiliary personnel. Therefore, providing a simple automatic pipette tip loading device can save a large amount of repetitive labor. Summary of the Invention

[0003] An embodiment of the present invention provides a device for automatically loading pipette tips into a tip box, aiming to solve the problem of time and energy consumption of manual pipette tip loading for R & D personnel or R & D auxiliary personnel.

[0004] The technical solution of the present invention is as follows:

[0005] A device for automatically loading pipette tips into a tip box includes a frame, and a drum device, a conveying device, a tip distribution device, a tip box moving and positioning device, and a sensing and correction device provided on the frame; a drum device is provided at the feeding end of the conveying device, and a tip distribution device and a tip box moving and positioning device are provided at the discharging section of the conveying device, and the sensing and correction device is disposed opposite to the conveying device.

[0006] As a preferred embodiment, the drum device includes a hopper, a feeding drum, a reduction motor, a first wheel shaft, and a second wheel shaft; the discharging port of the hopper is connected to the feeding hole of the feeding drum, the reduction motor is connected to the first wheel shaft, and the feeding drum is disposed on the first wheel shaft and the second wheel shaft; the reduction motor drives the first wheel shaft to rotate to realize the rolling rotation of the feeding drum, and at the same time, the relative sliding between the first wheel shaft and the second wheel shaft and the feeding drum ensures the stability of the rotation of the feeding drum.

[0007] As a preferred embodiment, the feeding roller includes a cylindrical shell, a feeding hole, a first protective ring, blades, baffles, and a second protective ring; the cylindrical shell includes a first side wall, a cylindrical barrel wall, and a second side wall, the feeding hole is arranged on the first side wall, the blades are arranged on the cylindrical shell, and the blades are connected to the baffles; the first protective ring surrounds the feeding hole, and a raised strip is arranged on the first protective ring opposite to the blades, and the second protective ring is arranged on the second side wall opposite to the first protective ring; when the feeding roller rotates, the raised strip and the baffle slide the pipette tips in the roller to the blades, and the blades in the rotating state collect the pipette tips onto the conveying device.

[0008] As a preferred embodiment, the blades have an angle with the diameter direction of the cylindrical barrel wall, and the angle is preferably 30 - 60°. The setting of the angle can realize the collection of the pipette tips by the feeding roller when it rotates.

[0009] As a preferred embodiment, the first protective ring is arranged inside the first side wall.

[0010] As a preferred embodiment, a first bracket is arranged on the frame, and the end shafts of the first and second round shafts are arranged in the holes of the first bracket. Driven by the belt of the reduction motor, the first round shaft is supported by the first bracket to provide rotational power for the rotation of the feeding roller, and the second round shaft provides a stable supporting effect for the feeding roller together with the first round shaft.

[0011] As a preferred embodiment, the discharge port of the hopper is connected to the feeding hole of the feeding roller, so that the discharge port of the hopper and the center of the feeding roller are on the same plane.

[0012] As a preferred embodiment, the reduction motor is preferably a 24V DC reduction motor.

[0013] As a preferred embodiment, a support plate is arranged at the discharge port of the hopper. A blocking notch adapted to the guide rail slideway is arranged on the side of the support plate far from the discharge port. The distance between the support plate and the guide rail slideway is greater than the straight pipe section of one pipette tip and less than the straight pipe section of two pipette tips; when an abnormal situation of overlapping pipette tips occurs, the blocking notch on the support plate can block and remove the overlapping pipette tips to prevent them from entering the subsequent guide rail slideway. When carrying out the box loading work, the pipette tips are poured into the hopper, and the support plate at the discharge port of the hopper can send the pipette tips into the feeding roller. Three blocking notches corresponding to the three guide rail slideways are arranged at the lower end of the support plate at the discharge port of the hopper, and there is a height difference between the three blocking notches and the guide rail slideway, which can remove the abnormal double - stacked pipette tips.

[0014] When loading the pipette tips into the box, pour the pipette tips into the hopper, turn on the power, and let the first-round shaft rotate through belt drive by the reduction motor, driving the feeding roller to rotate. With the collection effect of the baffle and blades by means of centrifugal force, the pipette tips that have not entered the guide rail chute can re-enter the guide rail chute.

[0015] As a preferred embodiment, the conveying device includes a pipette tip posture correction device, a guide rail chute, and a linear conveying vibrator. The linear conveying vibrator is arranged below the guide rail chute. The feeding end of the guide rail chute is arranged below the discharging opening of the hopper. A pipette tip posture correction device is arranged at the feeding end of the guide rail chute, and the pipette tip posture correction device is arranged inside the feeding roller. Preferably, there are three guide rail chutes.

[0016] As a preferred embodiment, the pipette tip posture correction device is a moving chute of a V-shaped wing. The moving chute of the V-shaped wing receives the pipette tips sent by the blades when the feeding roller rotates. The pipette tips are conveyed to the discharging end along the guide rail chute under the vibration of the linear conveying vibrator.

[0017] Furthermore, two downward-sliding recovery channels are arranged between the three guide rail chutes. The downward-sliding recovery channels are connected to the feeding roller. When the non-correctly positioned pipette tips are blocked by the correction assembly, they slide into the downward-sliding recovery channels, and then the downward-sliding recovery channels send the slipped pipette tips back to the feeding roller.

[0018] The tip dispensing device is arranged at the discharging end of the guide rail chute. The tip dispensing device includes a dispensing device bracket, a bi-directional self-holding electromagnet, a dispensing door assembly and a dispensing door bracket. The bi-directional self-holding electromagnet is arranged on one side of the dispensing device bracket and is connected to the dispensing door assembly to realize the bi-directional movement of the dispensing door assembly. The dispensing door assembly includes a slide rod, a fixed block, a first baffle and a second baffle. The slide rod is linked to the bi-directional self-holding electromagnet, and the fixed block is arranged at one end of the slide rod far away from the bi-directional self-holding electromagnet. The first baffle and the second baffle are respectively arranged on both sides of the fixed block. The first baffle is provided with three first notches opposite to the guide rail chute, and the second baffle is provided with three second notches opposite to the guide rail chute. The first notches and the second notches are arranged staggeredly. When the bi-directional self-holding electromagnet drives the dispensing door assembly to be in the first direction, the first notches correspond to the guide rail chute, so that the pipette tips on the guide rail chute enter between the first baffle and the second baffle, achieving the effect of the first baffle entering and the second baffle blocking. When the bi-directional self-holding electromagnet drives the dispensing door assembly to be in the second direction, the first baffle blocks the subsequent pipette tips on the guide rail chute, and the second notches correspond to the guide rail chute, achieving the effect of the first baffle blocking and the second baffle exiting. The pipette tips slide off the dispensing door assembly on the guide rail chute and enter the tip box at the end of the guide rail chute.

[0019] As a preferred embodiment, the tip box moving and positioning device includes a cross slide table and a tip box rack arranged on the cross slide table. The cross slide table is composed of an X-axis drive assembly and a Y-axis drive assembly. The cross slide table composed of the X-axis drive assembly and the Y-axis drive assembly can move in the X-axis and Y-axis directions to align the pipette tips falling at the end of the guide rail chute with the tip holes in the tip box. Further preferably, the X-axis drive assembly preferably adopts a double optical axis ball screw with an effective stroke of 50 mm, and the Y-axis drive assembly preferably adopts a double optical axis ball screw with an effective stroke of 200 mm.

[0020] As a preferred embodiment, the sensing and correcting device is composed of a sensing and correcting bracket, a sensor disposed on the sensing and correcting bracket, and a correcting component. The sensing and correcting bracket is disposed on the bracket by the bridging method. The sensor is disposed opposite to the guide rail chute for counting and balancing the pipette tips on the three guide rail chutes. The correcting component is a blocking block, which is disposed opposite to the guide rail chute. The distance between the correcting component and the upper end surface of the guide rail chute is greater than the length of the straight pipe section of the pipette tip by 1-3 mm (slightly greater than the length of the straight pipe section of the pipette tip), so as to enable the pipette tip with the correct posture of "wide at the top and narrow at the bottom" (the upper end of the pipette tip is a straight pipe section and the lower end is a spinal canal section) to pass through smoothly. The pipette tip with an incorrect posture slides off the guide rail chute and enters the downward sliding recovery channel on the side of the guide rail chute due to the blocking effect of the correcting component, realizing the counting and correction of the pipette tips.

[0021] Further preferably, there are two sets of the sensing and correcting devices to realize the real-time sensing counting and correction of the pipette tips on the guide rail chute.

[0022] As a preferred embodiment, it further includes an electrical control device, which is used to set parameters and control the smooth operation of the device.

[0023] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0024] 1. When using the device of the present invention to load the pipette tips into the box, pour the pipette tips into the hopper, turn on the power, and the first round shaft rotates by the reduction motor through the belt drive, driving the feeding roller to rotate. With the collection effect of the baffle and the blades by means of centrifugal force, the pipette tips that have not entered the guide rail chute re-enter the guide rail chute, thus realizing the continuous automatic feeding of the pipette tips.

[0025] 2. The device of the present invention has three guide rail chutes. V-shaped wings are respectively installed on one side of the chutes close to the feeding cylinder as the pipette tip posture correction device to correct the feeding of the pipette tips. Receive the pipette tips sent by the feeding roller during rotation, and are sent to the discharge end along the chute under the action of the linear conveying vibrator. And the pipette tips rejected by the correcting component can re-enter the feeding roller through the downward sliding recovery channel, so as to re-feed the pipette tips with incorrect postures back to the feeding roller while realizing the transportation of the pipette tips.

[0026] 3. The tip dispensing device in the present invention is composed of a dispensing device bracket, a bi-directional self-holding electromagnet, a dispensing door assembly and a dispensing door bracket. By staggering the notches of the first baffle and the second baffle on the dispensing door assembly to form a working mode of advancing in the front and blocking in the back, and blocking in the front and discharging in the back, the effect of enabling the pipette tips to fall into the pipette tip box in an orderly manner through a simple structure is realized.

[0027] 4. In the present invention, through the mutual cooperation of the pipette tip dispensing device, the cross slide, and the sensing and correction device, the automatic loading of pipette tips into the tip box is achieved with high precision and without omission, which has high practical value and commercial application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic three-dimensional structure diagram of the device for automatically loading pipette tips into the tip box described in Embodiment 1 of the present invention.

[0029] Figure 2 It is a schematic side structure diagram of the device for automatically loading pipette tips into the tip box described in Embodiment 1 of the present invention.

[0030] Figure 3 It is a schematic three-dimensional structure diagram of the loading roller described in Embodiment 1 of the present invention.

[0031] Figure 4 It is a schematic side structure diagram of the loading roller described in Embodiment 1 of the present invention.

[0032] Figure 5 It is Figure 4 a schematic cross-sectional structure diagram of the A-A section line in

[0033] Figure 6 It is a schematic top view structure diagram of the loading roller described in Embodiment 1 of the present invention.

[0034] Figure 7 It is Figure 6 a schematic cross-sectional structure diagram of the C-C section line in

[0035] Figure 8 It is a schematic structure diagram of the pipette tip posture correction device and the guide rail and slideway in the embodiment of the present invention.

[0036] Figure 9 It is a schematic structure diagram of the dispensing door assembly in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] To solve the problem of the time and energy consumption of manual loading of pipette tips by R & D personnel or R & D assistant personnel. Embodiment of the present invention provides a device for automatically loading pipette tips into the tip box, realizing the automatic loading of tips into the tip box.

[0039] Example 1

[0040] Such asFigure 1 and Figure 2 As shown in Figure 2 , the embodiments of the present invention are implemented as follows. A device for automatically loading pipette tips into a tip box includes a frame 5, and a roller device 1, a conveying device 2, a tip dispensing device 3, a tip box moving and positioning device 4, and a sensing and correcting device 6 provided on the frame 5. The feeding end of the conveying device 2 is provided with the roller device 1, the discharging section of the conveying device 2 is provided with the tip dispensing device 3 and the tip box moving and positioning device 4, and the sensing and correcting device 6 is disposed opposite to the conveying device 2.

[0041] The roller device 1 includes a hopper 11, a feeding roller 12, a reduction motor 13, a first wheel shaft 14, and a second wheel shaft 15. The discharging port of the hopper 11 is connected to the feeding hole 122 of the feeding roller 12. The reduction motor 13 is connected to the first wheel shaft 14, and the feeding roller 12 is disposed on the first wheel shaft 14 and the second wheel shaft 15. The reduction motor 13 drives the first wheel shaft 14 to rotate to realize the rolling rotation of the feeding roller 12. At the same time, the relative sliding between the first wheel shaft 14 and the second wheel shaft 15 and the feeding roller 12 ensures the stability of the rotation of the feeding roller 12.

[0042] As Figures 3 - 7 shown, the feeding roller 12 includes a cylindrical shell 121, a feeding hole 122, a first protective ring 123, blades 124, a baffle 125, and a second protective ring 130. The cylindrical shell 121 includes a first side wall 126, a cylindrical barrel wall 127, and a second side wall 128. The feeding hole 122 is provided on the first side wall 126. The blades 124 are provided on the cylindrical shell 121, and the blades 124 are connected to the baffle 125. The first protective ring 123 is disposed around the feeding hole 122, and a raised strip 129 is provided on the first protective ring 123 opposite to the blades 124. The second protective ring 125 is disposed on the second side wall 128 opposite to the first protective ring 123. When the feeding roller 12 rotates, the raised strip 129 and the baffle 125 slide the pipette tips in the roller to the blades 124, and the blades 124 collect the pipette tips onto the conveying device 2 in a rotating state.

[0043] As a preferred embodiment, the blades 124 form an angle with the diameter direction of the cylindrical barrel wall 127, and the angle is preferably 30 - 60°. The setting of the angle can realize the collection of the pipette tips by the feeding roller 12 during rotation.

[0044] As a preferred embodiment, the first protective ring 123 is disposed inside the first side wall 126.

[0045] As a preferred embodiment, a first bracket 51 is provided on the frame 5. The end shafts of the first roller shaft 14 and the second roller shaft 15 are arranged in the holes of the first bracket. Driven by the belt of the reduction motor 13, the first roller shaft 14, supported by the first bracket 51, provides rotational power for the rotation of the feeding roller 12, and the second roller shaft 15 provides a stable supporting effect for the feeding roller 12 together with the first roller shaft 14.

[0046] As a preferred embodiment, the discharge port of the hopper 11 is connected to the feed hole 122 of the feeding roller 12, so that the discharge port of the hopper 11 and the center of the feeding roller 12 are on the same plane.

[0047] As a preferred embodiment, the reduction motor 13 is preferably a 24V DC reduction motor.

[0048] As a preferred embodiment, a support plate 111 is provided at the discharge port of the hopper 11. On the side of the support plate 111 away from the discharge port, there is a blocking notch adapted to the guide rail chute. The distance between the support plate 111 and the guide rail chute is greater than the straight pipe section of one pipette tip and less than the straight pipe section of two pipette tips; when an abnormal situation of overlapping pipette tips occurs, the blocking notch on the support plate 111 can block and remove the overlapping pipette tips to prevent them from entering the subsequent guide rail chute. When performing the box loading operation, the pipette tips are poured into the hopper 11, and the support plate 111 at the discharge port of the hopper 11 can send the pipette tips into the feeding roller 12. At the lower end of the support plate 111 at the discharge port of the hopper 11, there are three blocking notches corresponding to the three guide rail chutes. The three blocking notches have a height difference from the guide rail chute, and can remove the abnormal double-overlapping pipette tips.

[0049] When performing the box loading operation of the pipette tips, the pipette tips are poured into the hopper 11. The power is turned on, and the reduction motor 13 drives the first roller shaft 14 to rotate through the belt drive, driving the feeding roller 12 to rotate. With the collection effect of the baffle 125 and the blades 124 by means of centrifugal force, the pipette tips that have not entered the guide rail chute are made to re-enter the guide rail chute.

[0050] As Figure 8 shown, as a preferred embodiment, the conveying device 2 includes a pipette tip posture correction device 21, a guide rail chute 22, and a linear conveying vibrator 23. The linear conveying vibrator 23 is arranged below the guide rail chute 22. The feeding end of the guide rail chute 22 is arranged below the discharge port of the hopper 11. A pipette tip posture correction device 21 is arranged at the feeding end of the guide rail chute 22, and the pipette tip posture correction device 21 is arranged in the feeding roller 12. The guide rail chute 22 is preferably three in number.

[0051] As a preferred embodiment, the pipette tip posture correction device 21 is a moving slideway of a V-shaped wing. The moving slideway of the V-shaped wing receives the pipette tips sent by the blades 124 when the feeding roller 12 rotates. The pipette tips are transported to the discharge end along the guide slideway 22 under the vibration of the linear conveying vibrator 23.

[0052] Further, two downward recovery channels are arranged between the three guide slideways 22. The downward recovery channels are connected to the feeding roller. When the non-correctly positioned pipette tips are blocked by the correction assembly, they slide into the downward recovery channels, and then the downward recovery channels send the slipped pipette tips back to the feeding roller.

[0053] The tip dispensing device 3 is arranged at the discharge end of the guide slideway 22. The tip dispensing device 3 includes a dispensing device bracket 31, a bi-directional self-holding electromagnet 32, a dispensing door assembly 33, and a dispensing door bracket 34. The bi-directional self-holding electromagnet 32 is arranged on one side of the dispensing device bracket 31. The bi-directional self-holding electromagnet 32 is connected to the dispensing door assembly 33 to realize the bi-directional movement of the dispensing door assembly 33. As shown in Figure 9, the dispensing door assembly 33 includes a slide rod 331, a fixed block 332, a first baffle 333, and a second baffle 334. The slide rod 331 is connected to the bi-directional self-holding electromagnet 32. The fixed block 332 is arranged at one end of the slide rod 331 far from the bi-directional self-holding electromagnet 32. The first baffle 333 and the second baffle 334 are respectively arranged on both sides of the fixed block 332. The first baffle 333 is provided with three first notches 335 opposite to the guide slideway 22. The second baffle 334 is provided with three second notches 336 opposite to the guide slideway 22. The first notches 335 and the second notches 336 are arranged staggeredly. When the bi-directional self-holding electromagnet 32 drives the dispensing door assembly 33 in the first direction, the first notches 335 correspond to the guide slideway 22, enabling the pipette tips on the guide slideway 22 to enter between the first baffle 334 and the second baffle 335, achieving the effect of the first baffle 334 entering and the second baffle 335 blocking. When the bi-directional self-holding electromagnet 32 drives the dispensing door assembly 33 in the second direction, the first baffle 334 blocks the subsequent pipette tips on the guide slideway 22, and the second notches 336 correspond to the guide slideway 22, achieving the effect of the first baffle 334 blocking and the second baffle 335 exiting. The pipette tips slide away from the dispensing door assembly 33 on the guide slideway 22 and enter the tip box at the end of the guide slideway 22.

[0054] As a preferred embodiment, the gun tip box moving positioning device 4 includes a cross slide 41 and a gun tip box frame 42 arranged on the cross slide 41, wherein the cross slide 41 is composed of an X-axis transmission component 411 and a Y-axis transmission component 412; the cross slide 41 composed of the X-axis transmission component 411 and the Y-axis transmission component 412 can move in the X-axis and Y-axis directions, so that the pipette tip falling at the end of the guide rail slide 22 is aligned with the gun tip hole in the gun tip box. Further preferably, the X-axis transmission component 411 preferably adopts a 50mm effective stroke dual-optical axis ball screw; the Y-axis transmission component 412 preferably adopts a 200mm effective stroke dual-optical axis ball screw.

[0055] As a preferred embodiment, the sensor correction device 6 is composed of a sensor correction bracket 61, a sensor and a correction component 62 arranged on the sensor correction bracket 61. The sensor correction bracket 61 is arranged on the bracket 5 by a bridging method. The sensor is arranged relative to the guide rail slide 22 to count and balance the pipette tips on the three guide rail slides 22; the correction component 62 is a blocking block, and the correction component 62 is arranged relative to the guide rail slide 22. The distance between the positive component 62 and the upper end surface of the guide rail slide 22 is 1-3mm larger than the length of the straight tube section of the pipette tip (slightly larger than the length of the straight tube section of the pipette tip), thereby achieving smooth passage of the pipette tip in the correct posture of "wide on top and thin on bottom" (the upper end of the pipette tip is a straight tube section, and the lower end is a spinal tube section). The pipette tip in the incorrect posture slides off the guide rail slide 22 and enters the sliding recovery path on the side of the guide rail slide 22 due to the blocking effect of the correction component 62, thereby achieving the counting and correction of the pipette tips.

[0056] Further preferably, the sensing and correction device 6 is comprised of two groups, so as to realize real-time sensing, counting and correction of the pipette tips on the guide rail 22 .

[0057] As a preferred embodiment, it also includes an electrical control device, which is used to set parameters and control the smooth operation of the device.

[0058] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0059] 1. When the device of the present invention is used to pack pipette tips, the pipette tips are poured into the hopper, the power is turned on, and the first wheel shaft is rotated by the reduction motor through the belt drive, driving the feeding roller to rotate, and the centrifugal force is used to collect the pipette tips that have not entered the guide rail slideway and re-enter the guide rail slideway under the collecting effect of the baffle and the blades, thereby realizing continuous automatic loading of the pipette tips.

[0060] 2. The device of the present invention has three guide rails. On the side of the guide rails near the feeding cylinder, V-shaped wings are respectively installed as a pipette tip posture correction device to correct the feeding of the pipette tips. The pipette tips sent when the feeding roller rotates are received, and are sent to the discharging end along the guide rails under the action of the linear conveying vibrator. Moreover, the pipette tips rejected by the correction assembly can re-enter the feeding roller through the downward-sliding recovery channel, so that while the pipette tips are conveyed, the pipette tips with incorrect postures are sent back to the feeding roller for re-feeding.

[0061] 3. The tip dispensing device in the present invention is composed of a dispensing device bracket, a bi-directional self-holding electromagnet, a dispensing door assembly and a dispensing door bracket. By staggering the notches of the first baffle and the second baffle on the dispensing door assembly, a working mode of advancing in the front and blocking in the back, blocking in the front and discharging in the back is formed, achieving the effect of enabling the pipette tips to fall into the pipette tip box orderly through a simple structure.

[0062] 4. Through the mutual cooperation of the tip dispensing device, the cross slide, and the sensing correction device in the present invention, the accurate and non-missing automatic loading of the pipette tips into the box is realized, which has high practical value and commercial application prospects.

[0063] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for automatically loading pipette tips into a tip box, characterized in that: It includes a frame, as well as a drum device, a conveying device, a gun head distribution device, a gun head box moving and positioning device, and a sensing and correction device provided on the frame; a drum device is provided at the feeding end of the conveying device, a gun head distribution device and a gun head box moving and positioning device are provided at the discharging section of the conveying device, and the sensing and correction device is arranged opposite to the conveying device; The drum device includes a hopper, a feeding drum, a reduction motor, a first wheel shaft and a second wheel shaft; the discharging port of the hopper is connected to the feeding hole of the feeding drum, the reduction motor is connected to the first wheel shaft, and the feeding drum is arranged on the first wheel shaft and the second wheel shaft; The feeding drum includes a cylindrical shell, a feeding hole, a first protective ring, blades, a baffle, and a second protective ring; the cylindrical shell includes a first side wall, a cylindrical barrel wall and a second side wall, the feeding hole is provided on the first side wall, the blades are arranged on the cylindrical shell, and the blades are connected to the baffle; The first protective ring is arranged around the feeding hole, raised strips are provided on the first protective ring relative to the blades, and the second protective ring is arranged on the second side wall relative to the first protective ring; The conveying device includes a pipette gun head posture correction device, a guide rail and slideway, and a linear conveying vibrator. The linear conveying vibrator is arranged below the guide rail and slideway. The feeding end of the guide rail and slideway is arranged below the discharging port of the hopper. A pipette gun head posture correction device is provided at the feeding end of the guide rail and slideway, and the pipette gun head posture correction device is arranged inside the feeding drum; there are three guide rails and slideways; The pipette gun head posture correction device is a moving slideway with a V-shaped wing; The tip dispensing device is arranged at the discharging end of the guide rail chute. The tip dispensing device includes a dispensing device bracket, a bi-directional self-holding electromagnet, a dispensing door assembly and a dispensing door bracket. The bi-directional self-holding electromagnet is arranged on one side of the dispensing device bracket and is connected to the dispensing door assembly to realize the bi-directional movement of the dispensing door assembly. The dispensing door assembly includes a slide rod, a fixed block, a first baffle and a second baffle. The slide rod is linked to the bi-directional self-holding electromagnet, and the fixed block is arranged at one end of the slide rod away from the bi-directional self-holding electromagnet. The first baffle and the second baffle are respectively arranged on both sides of the fixed block. The first baffle is provided with three first notches opposite to the guide rail chute, and the second baffle is provided with three second notches opposite to the guide rail chute. The first notches and the second notches are arranged staggeredly. When the bi-directional self-holding electromagnet drives the dispensing door assembly in the first direction, the first notches correspond to the guide rail chute, so that the pipette tips on the guide rail chute enter between the first baffle and the second baffle, achieving the effect of the first baffle entering and the second baffle blocking. When the bi-directional self-holding electromagnet drives the dispensing door assembly in the second direction, the first baffle blocks the subsequent pipette tips on the guide rail chute, and the second notches correspond to the guide rail chute, achieving the effect of the first baffle blocking and the second baffle exiting. The pipette tips slide away from the dispensing door assembly on the guide rail chute and enter the tip box at the end of the guide rail chute.

2. The device for automatically loading pipette tips into a tip box according to claim 1, characterized in that: The blade has an angle with the diameter direction of the cylindrical barrel wall, and the angle is 30 - 60°. A first bracket is arranged on the frame, and the end shafts of the first wheel shaft and the second wheel shaft are arranged in the holes of the first bracket. The feeding port of the hopper is connected to the feeding hole of the feeding roller, so that the feeding port of the hopper and the center of the feeding roller are on the same plane.

3. The device for automatically loading pipette tips into a tip box according to claim 1, characterized in that: A support plate is arranged at the feeding port of the hopper. A blocking notch adapted to the guide rail chute is arranged on the side of the support plate away from the feeding port. The distance between the support plate and the guide rail chute is greater than the straight pipe section of one pipette tip and less than the straight pipe section of two pipette tips.

4. The device for automatically loading pipette tips into a tip box according to claim 1, characterized in that: Two downward recovery channels are arranged between the three guide rail chutes, and the downward recovery channels are linked to the feeding roller.

5. The device for automatically loading pipette tips into a tip box according to claim 1, characterized in that: The tip box moving and positioning device includes a cross slide table and a tip box frame arranged on the cross slide table. The cross slide table is composed of an X-axis drive assembly and a Y-axis drive assembly. The cross slide table composed of the X-axis drive assembly and the Y-axis drive assembly can move in the X-axis and Y-axis directions to align the pipette tips falling from the end of the guide rail chute with the tip holes in the tip box.

6. The device for automatically loading pipette tips into a tip box according to claim 1, characterized in that: The described sensing and correcting device consists of a sensing and correcting bracket, a sensor, and a correcting component arranged on the sensing and correcting bracket. The sensing and correcting bracket is arranged on the bracket by the bridging method. The sensor is arranged opposite to the guide rail chute for counting and balancing the pipette tips on the three guide rail chutes. The correcting component is a blocking block, which is arranged opposite to the guide rail chute, and the distance between the correcting component and the upper end face of the guide rail chute is 1-3 mm greater than the length of the straight pipe section of the pipette tip.

7. The device for automatically loading pipette tips into a tip box according to claim 1, characterized in that: It further includes an electrical control device.

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