Device for assisting pipettor module to withdraw TIP head

Abstract

The utility model provides a device for assisting a pipettor module to withdraw a TIP head, which comprises a fixed seat, a connecting plate and a clamping plate, the fixed seat is used for being fixed on a barrel opening of a TIP head waste barrel, the connecting plate is vertically arranged along the front-back direction, the lower end of the connecting plate is arranged on the fixed seat, the clamping plate is horizontally arranged at the upper end of the connecting plate along the front-back direction, and the clamping plate is arranged on the fixed seat. The right portion of the clamping plate protrudes out of the upper end of the connecting plate rightwards, clamping openings are vertically formed in the right side face of the clamping plate, the clamping openings are used for being located above a barrel opening and clamped outside a vertical casing pipe of a pipettor module retreating TIP head, and the multiple clamping openings are arranged at intervals front and back. When the pipettor module fails to retreat the TIP head, the TIP head retreating device can assist the pipettor module to retreat the TIP head, and frequent error reporting caused by failure of retreating the TIP head of an automatic work station is avoided, so that stable operation of the automatic work station is ensured, and tediousness of cooperative operation of technicians is liberated.

Description

Technical Field

[0001] This utility model relates to the field of forensic chemical testing technology, and particularly to the field of automated workstations for forensic chemical testing, specifically a device for assisting pipette modules in removing TIP tips. Background Technology

[0002] Forensic chemical testing assesses the physiological and pathological state of a person by detecting chemical components such as enzymes, proteins, carbohydrates, fats, and electrolytes in biological samples such as blood, urine, and bodily fluids. It is of great significance in forensic medicine and can help determine the cause of death, the extent of injury, and poisoning.

[0003] Currently, automated workstations are widely used in the field of forensic chemical testing. Automated workstations are characterized by high efficiency and intelligence, enabling users to easily cope with various challenges.

[0004] Automated workstations for forensic chemical analysis are typically equipped with pipette modules for loading tipping devices for aspiration and pipetting. Loading the tipping device relies on the downward force of the pipette module's Z-axis movement, while unloading it is achieved by the downward thrust of an internal motor. This thrust causes the vertical sleeve outside the pipette tip to move downwards, pushing the tip off. However, the pipette modules often suffer from the thorny problem of tip retraction failure, which can be caused by various factors, such as:

[0005] ① Batch-to-batch variation of TIP heads: Most TIP heads are made of PP granules. The consumables in each batch are affected by the differences in the materials themselves and the process deviations in the manufacturing of TIP head molds.

[0006] ② The effect of storage temperature on the TIP head. For example, the temperature difference between the four seasons is large in the north. The TIP head expands and contracts with temperature. For pipette modules with fixed torque or positioning, there will be a big difference after loading the TIP head. When the temperature is low, the pipette module is relatively tight after loading the TIP head, and the torque required to remove the TIP head is relatively large. At this time, it is easy to fail to remove the TIP head.

[0007] ③ The torque of loading the tip on the pipette module and the impact of differences in pipette module debugging: For each engineer's debugging of the pipette module, there will be a certain deviation in positioning;

[0008] ④ The effect of rust and corrosion on pipette module tips: If the pipette module tips are rusty and the surface is not smooth, the friction between the pipette module tips and the inner surface of the tips will increase after the tips are loaded, which will cause the pipette module to fail to remove the tips.

[0009] ⑤ The torque reduction of the pipette module's tip ejection motor after prolonged use will affect the tip ejection torque. After the pipette module has been running for a period of time, the torque of the tip ejection motor will decrease and will not be able to meet the torque required for tip ejection, thus causing tip ejection failure.

[0010] Therefore, it is desirable to provide a device for assisting the pipette module in retracting the tip, which can assist the pipette module in retracting the tip when the pipette module fails to do so, thereby avoiding frequent error reports from the automated workstation due to tip retraction failure, ensuring the stable operation of the automated workstation, and freeing technicians from the tedious operation. Utility Model Content

[0011] In order to overcome the shortcomings of the prior art, one objective of this utility model is to provide a device for assisting the pipette module in retracting the tip. When the pipette module fails to retract the tip, it can assist the pipette module in retracting the tip, thereby avoiding frequent error reports from the automated workstation due to tip retraction failure, thus ensuring the stable operation of the automated workstation, freeing technicians from the tedious operation, and making it suitable for large-scale promotion and application.

[0012] Another objective of this invention is to provide a device for assisting in removing the tip from a pipette module. This device is ingeniously designed, has a simple structure, is easy to manufacture, has low manufacturing cost, and is suitable for large-scale application.

[0013] To achieve the above objectives, this utility model provides a device for assisting in the removal of the tip from a pipette module, characterized by comprising a fixing base, a connecting plate, and a retaining plate, wherein:

[0014] The fixing base is used to fix it to the opening of the TIP head waste container. The connecting plate is arranged vertically and along the front-to-back direction. The lower end of the connecting plate is set on the fixing base. The clamping plate is arranged horizontally and along the front-to-back direction on the upper end of the connecting plate. The right part of the clamping plate protrudes to the right from the upper end of the connecting plate. The right side of the clamping plate is provided with a vertically arranged slot. The slot is used to be located above the opening of the container and to be locked onto the outside of the vertical sleeve of the TIP head of the pipette module. There are multiple slots, and the multiple slots are arranged at intervals.

[0015] Preferably, the number of checkpoints is two.

[0016] Preferably, the cross-section of the bayonet is semi-circular.

[0017] Preferably, the upper end of the connecting plate extends to the right to form an extension portion, and the card plate is also disposed on the extension portion, with the right part of the card plate protruding to the right from the extension portion.

[0018] More preferably, the lower surface of the extension extends upward and to the right in an arc shape from the top of the right side of the connecting plate to the bottom of the right side of the extension.

[0019] Preferably, the fixing base includes a front side plate, a rear side plate, and a left side plate. The front side plate and the rear side plate are both vertically arranged and arranged along the left-right direction, and are spaced apart from each other. The left side plate is vertically arranged and arranged along the front-back direction. The left side plate is located between the left side of the front side plate and the left side of the rear side plate and connects the left side of the front side plate and the left side of the rear side plate, respectively. The lower end of the connecting plate is disposed on the left side plate. The left side plate is used to be located on the left side of the left side wall of the barrel opening and abuts against the left side wall. The front side plate and the rear side plate are used to be located in front of the front side wall and behind the rear side wall of the barrel opening, respectively, and connect the front side wall and the rear side wall, respectively. The TIP head waste bin is vertically arranged and arranged along the front-back direction.

[0020] More preferably, the fixing seat further includes a front fixing bolt and a front fixing nut. The front side plate is provided with a front fixing hole along the front-rear direction and is used to abut against the front side wall. The front fixing bolt is provided along the front-rear direction. The front end of the front fixing bolt is located in front of the front side plate and abuts against the front side plate. The middle part of the front fixing bolt passes through the front fixing hole along the front-rear direction and is used to pass through the front side wall along the front-rear direction. The rear end of the front fixing bolt is used to be located behind the front side wall. The front fixing nut is sleeved on and threadedly engaged with the rear end of the front fixing bolt. The front fixing nut is used to be located behind the front side wall and abuts against the front side wall.

[0021] Furthermore, there are multiple front fixing holes, which are arranged vertically at intervals.

[0022] More preferably, the fixing seat further includes a rear fixing bolt and a rear fixing nut. The rear side plate is provided with a rear fixing hole along the front-rear direction and is used to abut against the rear side wall. The rear fixing bolt is provided along the front-rear direction. The rear end of the rear fixing bolt is located behind the rear side plate and abuts against the rear side plate. The middle part of the rear fixing bolt passes through the rear fixing hole along the front-rear direction and is used to pass through the rear side wall along the front-rear direction. The front end of the rear fixing bolt is used to be located in front of the rear side wall. The rear fixing nut is sleeved and threadedly engaged with the front end of the rear fixing bolt. The rear fixing nut is used to be located in front of the rear side wall and abuts against the rear side wall.

[0023] Furthermore, there are multiple rear fixing holes, which are arranged vertically at intervals.

[0024] The main beneficial effects of this utility model are as follows:

[0025] 1. The device of this utility model for assisting in the removal of the tip from a pipette module includes a fixed base, a connecting plate, and a clamping plate. The fixed base is fixed to the opening of the tip waste container. The connecting plate is vertically arranged along the front-to-back direction, with its lower end set on the fixed base. The clamping plate is horizontally arranged along the front-to-back direction on the upper end of the connecting plate. The right side of the clamping plate protrudes to the right from the upper end of the connecting plate. A latch is vertically arranged on the right side of the clamping plate. The latch is located above the opening of the container and is used to lock onto the vertical sleeve of the tip removal tube of the pipette module. Multiple latches are arranged at intervals between each other. When the pipette module moves vertically upwards, the additional flange at the lower end of the vertical sleeve of the TIP tip is engaged by a locking mechanism. The vertical sleeve is then held in place, preventing the TIP tip from moving upwards with the pipette module, thus allowing the TIP tip to be retracted. This automatic TIP tip retraction mechanism enables error-tolerant handling. Therefore, when the pipette module fails to retract the TIP tip, it assists in doing so, preventing frequent errors from occurring on the automated workstation due to retraction failures. This ensures stable operation of the automated workstation, frees technicians from tedious operations, and is suitable for large-scale application.

[0026] 2. The device of this utility model for assisting in the removal of the tip from a pipette module includes a fixed base, a connecting plate, and a clamping plate. The fixed base is fixed to the opening of the tip waste container. The connecting plate is vertically arranged along the front-to-back direction, with its lower end set on the fixed base. The clamping plate is horizontally arranged along the front-to-back direction on the upper end of the connecting plate. The right side of the clamping plate protrudes to the right from the upper end of the connecting plate. A latch is vertically arranged on the right side of the clamping plate, which is positioned above the opening of the container and used to engage the tip removal mechanism of the pipette module. The vertical sleeve has multiple locking tabs, spaced apart from each other. In use, the locking tabs engage the additional flange at the lower end of the vertical sleeve for retracting the tip, and then the pipette module is moved vertically upwards. At this point, the vertical sleeve for retracting the tip is locked in place, preventing the tip from moving upwards with the pipette module, thus retracting the tip. This achieves automatic tip locking with error tolerance. Therefore, its design is ingenious, its structure is simple, its manufacturing is easy, and its manufacturing cost is low, making it suitable for large-scale promotion and application.

[0027] These and other objects, features and advantages of this utility model will be fully apparent from the following detailed description and drawings, and can be achieved by the means, devices and combinations thereof specifically pointed out in the description of the utility model. Attached Figure Description

[0028] Figure 1 This is a perspective view of a specific embodiment of the device of the present invention for assisting in removing the tip of a pipette module.

[0029] Figure 2 Is with Figure 1 The diagram shows a partial three-dimensional view of the vertical sleeve of the pipette module used in the specific embodiment.

[0030] Figures 3-8 Is adopted Figure 1 The diagram shown is a front view partial schematic of different stages of the process by which the pipette module removes the tip in a specific embodiment.

[0031] (Symbol Explanation)

[0032] 1. Fixing base; 2. Connecting plate; 3. Clamping plate; 4. Bayonet; 5. Extension; 6. Front side plate; 7. Rear side plate; 8. Left side plate; 9. Front fixing bolt; 10. Front fixing hole; 11. Rear fixing hole; 12. TIP head waste container; 13. Pipette module; 14. TIP head retraction vertical sleeve; 15. Flange; 16. Pipette tip; 17. TIP head. Detailed Implementation

[0033] In order to better understand the technical content of this utility model, the following embodiments are provided for detailed description.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Please see Figure 1 As shown, in a specific embodiment of this utility model, the device for assisting the removal of the TIP tip from a pipette module includes a fixing base 1, a connecting plate 2, and a retaining plate 3, wherein:

[0036] The fixing base 1 is used to fix it to the opening of the TIP head waste container 12. The connecting plate 2 is vertically arranged along the front-to-back direction, and the lower end of the connecting plate 2 is set on the fixing base 1. The clamping plate 3 is horizontally arranged along the front-to-back direction on the upper end of the connecting plate 2. The right part of the clamping plate 3 protrudes to the right from the upper end of the connecting plate 2. The right side of the clamping plate 3 is vertically provided with a latch 4. The latch 4 is used to be located above the opening of the container and to be used to lock onto the vertical sleeve 14 of the TIP head ejection device 13 (see...). Figure 2 In addition, there are multiple checkpoints 4, which are arranged at intervals.

[0037] The number of checkpoints 4 can be determined as needed. "Multiple" refers to two or more. Please refer to [link to relevant documentation]. Figure 1 As shown, in a specific embodiment of this utility model, the number of the bayonet 4 is 2.

[0038] The cross-section of the bayonet 4 can have any suitable shape; please refer to [link / reference]. Figure 1 As shown, in a specific embodiment of this utility model, the cross-section of the bayonet 4 is semi-circular.

[0039] The upper end of the connecting plate 2 can have any suitable shape; please refer to [link / reference]. Figure 1 As shown, in a specific embodiment of this utility model, the upper end of the connecting plate 2 extends to the right to form an extension portion 5, and the card plate 3 is also disposed on the extension portion 5, with the right part of the card plate 3 protruding to the right from the extension portion 5.

[0040] The lower surface of the extension 5 can have any suitable shape; see [link to relevant documentation]. Figure 1 As shown, in a specific embodiment of this utility model, the lower surface of the extension 5 extends upward and to the right in an arc shape from the top of the right side of the connecting plate 2 to the bottom of the right side of the extension 5.

[0041] The mounting base 1 can have any suitable configuration; please refer to [link / reference]. Figure 1 As shown, in a specific embodiment of this utility model, the fixing base 1 includes a front side plate 6, a rear side plate 7, and a left side plate 8. The front side plate 6 and the rear side plate 7 are both vertically arranged and arranged along the left-right direction, and are spaced apart from each other. The left side plate 8 is vertically arranged and arranged along the front-back direction. The left side plate 8 is located between the left side of the front side plate 6 and the left side of the rear side plate 7 and is respectively connected to the left side of the front side plate 6 and the left side of the rear side plate 7. The lower end of the connecting plate 2 is arranged on the left side plate 8. The left side plate 8 is used to be located on the left side of the left side wall of the barrel opening and abuts against the left side wall. The front side plate 6 and the rear side plate 7 are respectively located in front of the front side wall and behind the rear side wall of the barrel opening and are respectively connected to the front side wall and the rear side wall. The TIP head waste bin 12 is vertically arranged and arranged along the front-back direction.

[0042] The front side plate 6 is used to connect to the front side wall and can adopt any suitable structure; please refer to [link / reference]. Figure 1 As shown, in a specific embodiment of this utility model, the fixing base 1 further includes a front fixing bolt 9 (see...). Figure 3The front side plate 6 is provided with a front fixing hole 10 along the front-rear direction and is used to abut against the front side wall. The front fixing bolt 9 is provided along the front-rear direction. The front end of the front fixing bolt 9 is located in front of the front side plate 6 and abuts against the front side plate 6. The middle part of the front fixing bolt 9 passes through the front fixing hole 10 along the front-rear direction and is used to pass through the front side wall along the front-rear direction. The rear end of the front fixing bolt 9 is used to be located behind the front side wall. The front fixing nut is sleeved and threadedly engaged with the rear end of the front fixing bolt 9. The front fixing nut is used to be located behind the front side wall and abuts against the front side wall.

[0043] The number of the front fixing holes 10 can be determined as needed. More specifically, there can be multiple front fixing holes 10, which are vertically spaced apart. The term "multiple" refers to two or more. Please refer to [link to relevant documentation]. Figure 1 As shown, in a specific embodiment of this utility model, the number of front fixing holes 10 is two.

[0044] The rear side plate 7 is used to connect to the rear side wall and can adopt any suitable structure; please refer to [reference needed]. Figure 1 As shown, in a specific embodiment of this utility model, the fixing base 1 further includes a rear fixing bolt (not shown) and a rear fixing nut (not shown). The rear side plate 7 is provided with a rear fixing hole 11 along the front-rear direction and is used to abut against the rear side wall. The rear fixing bolt is provided along the front-rear direction. The rear end of the rear fixing bolt is located behind the rear side plate 7 and abuts against the rear side plate 7. The middle part of the rear fixing bolt passes through the rear fixing hole 11 along the front-rear direction and is used to pass through the rear side wall along the front-rear direction. The front end of the rear fixing bolt is used to be located in front of the rear side wall. The rear fixing nut is sleeved and threadedly engaged with the front end of the rear fixing bolt. The rear fixing nut is used to be located in front of the rear side wall and abuts against the rear side wall.

[0045] The number of rear fixing holes 11 can be determined as needed. More specifically, there can be multiple rear fixing holes 11, which are vertically spaced apart. Please refer to [link to relevant documentation]. Figure 1 As shown, in a specific embodiment of this utility model, the number of rear fixing holes 11 is two.

[0046] With the above configuration, when it is necessary to fix the fixing seat 1 to the opening of the TIP head waste bin 12, the opening of the TIP head waste bin 12 is inserted between the front side plate 6, the rear side plate 7, and the left side plate 8, such that the front side plate 6 is located in front of and abuts against the front side wall, the rear side plate 7 is located behind and abuts against the rear side wall, and the left side plate 8 is located to the left of and abuts against the left side wall. The front fixing bolt 9 is then passed through the front fixing hole 10 and the front side wall sequentially from front to back until the front end of the front fixing bolt 9 is located in front of and abuts against the front side plate 6. And the rear end of the front fixing bolt 9 is located behind the front sidewall. The front fixing nut is sleeved and threaded onto the rear end of the front fixing bolt 9 until the front fixing nut is located behind the front sidewall and abuts against the front sidewall. The rear fixing bolt is passed through the rear fixing hole 11 and the rear sidewall from back to front until the rear end of the rear fixing bolt is located behind the rear side plate 7 and abuts against the rear side plate 7 and the front end of the rear fixing bolt is located in front of the rear sidewall. The rear fixing nut is sleeved and threaded onto the front end of the rear fixing bolt until the rear fixing nut is located in front of the rear sidewall and abuts against the rear sidewall.

[0047] When using it, the lower end of the vertical sleeve 14 of the pipette module 13 equipped with the forensic chemical testing automation workstation needs to be structurally modified accordingly: a flange 15 is provided to extend horizontally outward from the lower end of the vertical sleeve 14 of the pipette module 13, such as... Figure 2 As shown, the flange 15 can be manufactured together with the vertical sleeve 14 for removing the TIP head, or it can be added later. For example, the flange 15 can be sleeved on the lower end of the vertical sleeve 14 for removing the TIP head, and can be fixed by welding, bonding or screws.

[0048] The TIP head waste container 12 is typically detachably fixed in the automated forensic chemical testing workstation. The fixing base 1 of this invention is fixed to the opening of the TIP head waste container 12. When it is detected that the motor inside the pipette module 13 fails to push the vertical sleeve 14 of the TIP head downwards to retract the TIP head 17, that is, the TIP head 17 has not been properly retracted (see...). Figure 3 When, for example, after performing the TIP tip 17 removal operation, the photoelectric detector detects that the TIP tip 17 is still present on the pipette tip 16 of the pipette module 13, the automated workstation performs fault tolerance processing (i.e., when the failure to remove the TIP tip 17 is detected, no error is reported immediately, but corresponding remedial measures are taken directly); the pipette module 13 is moved above the opening of the TIP tip waste container 16 and lowered, so that the flange 15 at the lower end of the vertical sleeve 14 for removing the TIP tip is lower than the bayonet 4 (see...). Figure 4Then, the pipette module 13 is moved to the left, causing the vertical sleeve 14 of the ejector tip to engage in the bayonet 4. The pipette module 13 is then moved upwards, engaging the flange 15 through the bayonet 4. At this point, the vertical sleeve 14 of the ejector tip is locked and cannot move upwards (see...). Figure 5 ); Move the pipette module 13 further upward. Since the vertical sleeve 14 for removing the TIP tip is stuck and cannot move upward, the lower end of the vertical sleeve 14 for removing the TIP tip 17 is used to push the TIP tip 17 off (see Figure 6 Then move the pipette module 13 to the right, causing the vertical sleeve 14 of the ejector tip to move to the right and exit the bayonet 4 (see...). Figure 7 Then move pipette module 13 upwards (see...). Figure 8 ), complete the entire card tip 17 action.

[0049] Therefore, this utility model utilizes a bayonet to hold the flange at the lower end of the vertical sleeve of the TIP head, and then moves the pipette module vertically upward. At this time, the vertical sleeve of the TIP head is held still, blocking the TIP head and preventing it from moving upward with the pipette module, thus removing the TIP head and achieving automatic TIP head locking with fault tolerance.

[0050] Forensic DNA samples are extremely valuable in criminal investigations and forensic identification due to their uniqueness and irreplaceability. On-site DNA samples are typically "disposable," such as trace amounts of blood or contact biological traces; once contaminated or lost, they cannot be reproduced. The value of these samples stems from their scientific merit, legal validity, and the irreversible extraction process. Their effective utilization requires advanced technology, professional expertise, and rigorous procedures to ensure judicial fairness and investigative efficiency. When the pipette module of the automated forensic chemical testing workstation fails to retract the TIP tip and reports an error, manual intervention is required. Human operation is prone to errors, easily leading to sample contamination or cross-contamination, resulting in extraction failure.

[0051] The pipette module of this utility model, used in conjunction with the automated workstation for forensic and chemical laboratory testing, enables automatic tip clamping for error-tolerant processing, eliminating the need for manual intervention. This frees staff from tedious manual operations and avoids the problems of sample contamination or cross-contamination that can lead to extraction failures after errors occur, ensuring the stable operation of the automated workstation. This utility model features a simple structure and is easy to operate.

[0052] This invention is applicable not only to automated workstations for forensic chemical testing, but also to other equipment equipped with pipette modules.

[0053] In summary, the device of this utility model for assisting the pipette module in retracting the tip can assist the pipette module in retracting the tip when the tip retraction fails, thus avoiding frequent error reports from the automated workstation due to tip retraction failure. This ensures the stable operation of the automated workstation, frees technicians from tedious operation, and is ingeniously designed, simple in structure, easy to manufacture, and low in manufacturing cost, making it suitable for large-scale promotion and application.

[0054] Therefore, it is evident that the objective of this utility model has been fully and effectively achieved. The function and structural principles of this utility model have been demonstrated and explained in the embodiments. Without departing from the stated principles, any modifications can be made to the implementation methods. Therefore, this utility model includes all modified embodiments based on the spirit and scope of the claims.

Claims

1. A device for assisting a pipette module in ejecting a TIP head, characterized in that, The device comprises a fixing base, a connecting plate and a clamping plate, wherein: The fixing base is used for fixing on the barrel opening of the TIP head waste barrel, the connecting plate is vertically arranged and arranged along the front-back direction, the lower end of the connecting plate is arranged on the fixing base, the clamping plate is horizontally arranged and arranged on the upper end of the connecting plate along the front-back direction, the right part of the clamping plate protrudes rightward from the upper end of the connecting plate, the right side of the clamping plate is vertically provided with a clamping opening, the clamping opening is used for being located above the barrel opening and clamped outside the TIP head vertical sleeve of the pipette module, and the number of the clamping openings is multiple.

2. The apparatus for assisting a pipette module in ejecting a TIP head of claim 1, wherein, The number of the clamping openings is two.

3. The apparatus for assisting a pipette module in ejecting a TIP head of claim 1, wherein, The cross section of the clamping opening is semicircular.

4. The apparatus for assisting a pipette module in ejecting a TIP head of claim 1, wherein, The upper end of the connecting plate extends rightward to form an extension part, and the clamping plate is further arranged on the extension part, and the right part of the clamping plate protrudes rightward from the extension part.

5. The apparatus for assisting a pipette module in ejecting a TIP head of claim 4, wherein, The lower surface of the extension part extends arcuately upward and rightward from the top of the right side of the connecting plate to the bottom of the right side of the extension part.

6. The apparatus for assisting a pipette module in ejecting a TIP head of claim 1, wherein, The fixing base comprises a front side plate, a rear side plate and a left side plate, the front side plate and the rear side plate are both vertically arranged and arranged along the left-right direction and spaced apart from each other in the front-back direction, the left side plate is vertically arranged and arranged along the front-back direction, the left side plate is located between the left side of the front side plate and the left side of the rear side plate and connects the left side of the front side plate and the left side of the rear side plate respectively, the lower end of the connecting plate is arranged on the left side plate, the left side plate is used for being located on the left side of the left side wall of the barrel opening and abutting against the left side wall, and the front side plate and the rear side plate are used for being located in front of the front side wall and behind the rear side wall of the barrel opening respectively and connecting the front side wall and the rear side wall respectively, wherein the TIP head waste barrel is vertically arranged and arranged along the front-back direction.

7. The apparatus for assisting a pipette module in ejecting a TIP head of claim 6, wherein, The fixing base further comprises a front fixing bolt and a front fixing nut, the front side plate is provided with a front fixing hole along the front-back direction and is used for abutting against the front side wall, the front fixing bolt is arranged along the front-back direction, the front end of the front fixing bolt is located in front of the front side plate and abuts against the front side plate, the middle part of the front fixing bolt penetrates the front fixing hole along the front-back direction and is used for penetrating the front side wall along the front-back direction, the rear end of the front fixing bolt is used for being located behind the front side wall, and the front fixing nut is sleeved and threadedly engaged with the rear end of the front fixing bolt and is used for being located behind the front side wall and abutting against the front side wall.

8. The apparatus for assisting a pipette module in ejecting a TIP head of claim 7, wherein, The number of the front fixing holes is multiple, and the multiple front fixing holes are vertically spaced apart from each other.

9. The apparatus for assisting a pipette module in ejecting a TIP head of claim 6, wherein, The fixing base further comprises a rear fixing bolt and a rear fixing nut, the rear side plate is provided with a rear fixing hole in the front-rear direction and is used for abutting against the rear side wall, the rear fixing bolt is arranged in the front-rear direction, a rear end of the rear fixing bolt is located behind the rear side plate and abuts against the rear side plate, a middle part of the rear fixing bolt is arranged through the rear fixing hole in the front-rear direction and is used for being arranged through the rear side wall in the front-rear direction, a front end of the rear fixing bolt is used for being located in front of the rear side wall, and the rear fixing nut is sleeved and threadedly engaged with the front end of the rear fixing bolt, and the rear fixing nut is used for being located in front of the rear side wall and abutting against the rear side wall.

10. The apparatus for assisting a pipette module in ejecting a TIP head of claim 9, wherein, The number of the rear fixing holes is multiple, and multiple rear fixing holes are vertically arranged at intervals.

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