A needle pusher and a sample analyzer

Abstract

The utility model provides a disposable needle pusher and a sample analyzer, be used for solving the problem of complex structure of pusher in prior art, it includes fixed base, first drive part, first connecting rod, second connecting rod and push seat, through setting first drive part, first connecting rod and second connecting rod on fixed base and setting push seat on the setting pipette gun on fixed base, drive first connecting rod and second connecting rod to move through first drive part, thereby drive push seat to slide on pipette gun, thereby realize the separation of pipette gun and disposable needle, simple structure can effectively reduce the manufacturing cost of overall instrument, can also reduce the load of moving device of driving pipette gun movement, ensure the stability of overall mechanism operation, in addition, the included angle of first connecting rod and second connecting rod with the central axis of pipette gun is greater than 0 degree, less than 180 degrees, thereby being convenient for maintaining pipette gun in later period.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and in particular relates to a disposable needle ejection device and a sample analyzer. Background Technology

[0002] In vitro diagnostics (IVD) refers to the technical means of obtaining information for clinical diagnosis, disease monitoring, or health assessment by testing human samples (such as blood, body fluids, and tissues). IVD is an important component of the medical field, widely used in disease screening, diagnosis, treatment monitoring, prognosis assessment, and personalized medicine.

[0003] In in vitro diagnostic medical devices, such as urine analyzers and nucleic acid testing analyzers, disposable needles are typically used to transfer samples or reagents. The disposable needle is attached to a pipette, and then used to aspirate the sample or reagent from the container before transferring it to a reaction cup or test card at the testing position. After the reagent or sample transfer is complete, the used disposable needle is removed from the pipette and replaced with an unused disposable needle.

[0004] In existing technologies, to remove disposable needles from a pipette, a relatively complex ejection mechanism, typically using a screw drive or belt drive, is usually incorporated into the pipette. A motor drives the screw or belt, which in turn moves a pusher component on the transmission mechanism to remove the disposable needle. However, this design not only increases the overall manufacturing cost of the instrument due to its complexity, but also places an excessive load on the moving mechanism driving the pipette, leading to instability during operation. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a disposable needle ejection device and a sample analyzer to solve the problem of complex structure of the ejection device in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides a disposable needle ejection device, comprising: a fixed base, a first driving member, a first connecting rod, a second connecting rod, and a pushing base; a pipette is disposed on the fixed base, and the first driving member is disposed on the fixed base; one end of the first connecting rod is connected to the first driving member, and the other end is rotatably connected to the second connecting rod; the end of the second connecting rod away from the first connecting rod is rotatably connected to the pushing base; the pushing base is slidably connected to the pipette; in any state, the angle formed by the first connecting rod and the second connecting rod with the central axis of the pipette is greater than 0 degrees and less than 180 degrees.

[0007] Optionally, the push seat is provided with a first through hole, the center line of the first through hole coincides with the central axis of the push seat; the inner side wall of the first through hole is slidably connected to the outer side wall of the pipette.

[0008] Optionally, the push base is provided with a mounting hole, the center line of which is perpendicular to the center line of the first through hole; the connection end of the second connecting rod and the push base is provided with a second through hole; the connection end of the second connecting rod and the push base is also provided with a first fixing member, which passes through the second through hole and connects to the mounting hole.

[0009] Optionally, it also includes at least one second fixing member; the fixing base is provided with a third through hole and at least one fixing hole, the fixing hole communicating with the third through hole; at least one blind hole is provided on the outer side of the pipette; the pipette part is located in the third through hole, and the second fixing member passes through the third through hole and abuts against the blind hole to fix the pipette on the fixing base.

[0010] Optionally, it also includes a first translation mechanism and a second translation mechanism; the fixed seat is disposed on the first translation mechanism and is used to drive the fixed seat to move up and down; the first translation mechanism is disposed on the second translation mechanism and the second translation mechanism is used to drive the first translation mechanism to move left and right.

[0011] Optionally, the first translation mechanism includes a first mounting plate, a second driving member, a first transmission assembly, and a first guide member; the second driving member, the first transmission assembly, and the first guide member are disposed on the first mounting plate; the fixed seat is connected to the first transmission assembly and slidably connected to the first guide member; the second driving member drives the first transmission assembly to move, thereby causing the fixed seat to slide on the first guide member.

[0012] Optionally, the first transmission assembly includes a first pulley, a second pulley, and a first belt; the first pulley is connected to the second driving member, the second pulley is disposed on the first mounting plate, the first belt is sleeved on the first pulley and the second pulley, and the fixed seat is connected to the first belt.

[0013] Optionally, the second translation mechanism includes a second mounting plate, a third driving member, a second transmission assembly, and a second guide member; the third driving member, the second transmission assembly, and the second guide member are disposed on the second mounting plate; the first mounting plate is connected to the second transmission assembly and slidably connected to the second guide member; the second driving member drives the second transmission assembly to move, thereby causing the first translation mechanism to slide on the second guide member.

[0014] Optionally, the second transmission assembly includes a third pulley, a fourth pulley, and a second belt; the third pulley is connected to the third driving member, the third pulley is mounted on the second mounting plate, the second belt is sleeved on the third pulley and the fourth pulley, and the second mounting plate is connected to the second belt.

[0015] On the other hand, this utility model also provides a sample analyzer, including the disposable needle ejection device as described above.

[0016] As described above, the disposable needle ejection device and sample analyzer of this utility model have at least the following beneficial effects: by setting a first driving member, a first connecting rod and a second connecting rod on a fixed base, and setting a push seat on a pipette set on the fixed base, the first driving member drives the first connecting rod and the second connecting rod to move, thereby causing the push seat to slide on the pipette, thereby realizing the separation of the pipette and the disposable needle. The structure is simple, which can effectively reduce the overall instrument manufacturing cost and reduce the load on the moving device that drives the pipette, ensuring the stability of the overall mechanism operation. In addition, the angle formed by the first connecting rod and the second connecting rod and the central axis of the pipette is greater than 0 degrees and less than 180 degrees, which facilitates the later maintenance of the pipette. Attached Figure Description

[0017] Figure 1 The diagram shown is a partial structural schematic of a disposable needle ejection device according to this utility model.

[0018] Figure 2 The diagram shown is a structural schematic of the pusher seat of a disposable needle ejection device according to this utility model.

[0019] Figure 3 The diagram shown is a partial structural schematic of the fixing seat of a disposable needle ejection device according to this utility model.

[0020] Figure 4 The diagram shown is a structural schematic of a pipette with a disposable needle ejection device according to this utility model.

[0021] Figure 5 The diagram shown is an overall structural schematic of a disposable needle ejection device according to this utility model.

[0022] Component designation explanation:

[0023] 1. Fixed base; 11. Third through hole; 12. Fixed hole; 13. Second fixing component; 2. First driving component; 3. First connecting rod; 4. Second connecting rod; 5. Push base; 51. First through hole; 52. Mounting hole; 53. First fixing component; 6. First translation mechanism; 61. First mounting plate; 62. Second driving component; 63. First transmission assembly; 631. First pulley; 632. Second pulley; 633. First belt; 64. First guide component; 7. Second translation mechanism; 71. Second mounting plate; 72. Third driving component; 73. Second transmission assembly; 731. Third pulley; 732. Fourth pulley; 733. Second belt; 74. Second guide component; 10. Pipette; 101. Blind hole; 20. Disposable needle. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] Please refer to all the accompanying drawings below. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0026] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0027] Please see Figure 1-2 This utility model provides a disposable needle ejection device, comprising: a fixed base 1, a first driving member 2, a first connecting rod 3, a second connecting rod 4, and a pushing base 5; a pipette 10 is disposed on the fixed base 1, and the first driving member 2 is disposed on the fixed base 1; one end of the first connecting rod 3 is connected to the first driving member 2, and the other end is rotatably connected to the second connecting rod 4; the end of the second connecting rod 4 away from the first connecting rod 3 is rotatably connected to the pushing base 5; the pushing base 5 is slidably connected to the pipette 10; in any state, the angle formed by the first connecting rod 3 and the second connecting rod 4 and the central axis of the pipette 10 is greater than 0 degrees and less than 180 degrees.

[0028] The first driving component 2 can be a motor or a cylinder or other driving element. In this embodiment, the first driving component 2 is a motor to reduce noise during use.

[0029] The angle formed by the first connecting rod 3 and the second connecting rod 4 with the central axis of the pipette 10 is greater than 0 degrees and less than 180 degrees. This means that the straight line a along the extension direction of the first connecting rod 3 and the straight line b along the extension direction of the second connecting rod 4 are not parallel to the central axis c of the pipetting chamber. Specifically, in this embodiment, the first driving member 2 is located on the right side of the fixed base 1, and the pipette 10 is located on the left side of the fixed base 1, that is, the first driving member 2 and the pipetting chamber are arranged left and right on the fixed base 1. One end of the first connecting rod 3 is fixedly connected to the output end of the first driving member 2, and the other end can be rotatably connected through a rotating shaft. The end of the second connecting rod 4 away from the first connecting rod 3 can also be rotatably connected to the push seat 5 through a rotating shaft. Thus, the angle formed by the first connecting rod 3 and the second connecting rod 4 with the central axis of the pipette 10 is greater than 0 degrees and less than 180 degrees, thereby transmitting the driving power of the first driving member 2 located on the right side of the fixed base 1 to the push seat 5 located on the left side of the fixed base 1, which facilitates the later maintenance of the pipette 10.

[0030] In use, the disposable needle 20 and the pipette 10 can be connected by interference fit or snap-fit. After the disposable needle 20 is used, the first drive member 2 rotates, driving the first connecting rod 3 to rotate. The rotation of the first connecting rod 3 drives the second connecting rod 4 to rotate, thereby causing the push seat 5 to slide downward on the pipette 10. This causes the lower end of the push seat 5 to abut against the upper end of the disposable needle 20, thus separating the disposable needle 20 from the pipette 10. After the disposable needle 20 is separated from the pipette 10, the first drive member 2 rotates in the opposite direction, causing the push seat 5 to move upward, thereby resetting the push seat 5.

[0031] This embodiment uses a first driving member 2, a first connecting rod 3, and a second connecting rod 4 on a fixed base 1, and a pusher seat 5 on a pipette 10 mounted on the fixed base 1. The first driving member 2 drives the first connecting rod 3 and the second connecting rod 4 to move, thereby causing the pusher seat 5 to slide on the pipette 10, thus achieving the separation of the pipette 10 and the disposable needle 20. The structure is simple, which can effectively reduce the overall manufacturing cost of the instrument, reduce the load on the moving device that drives the movement of the pipette 10, and ensure the stability of the overall mechanism.

[0032] The push seat 5 is provided with a first through hole 51. The center line of the first through hole 51 coincides with the central axis of the push seat 5. The inner side wall of the first through hole 51 is slidably connected to the outer side wall of the pipette 10. This ensures that the lower end of the push seat 5 can abut against the upper end of the disposable needle 20 in the circumference of the pipette 10, thereby ensuring that the disposable needle 20 can be separated from the tip of the pipette 10.

[0033] The push base 5 is provided with a mounting hole 52, the center line of which is perpendicular to the center line of the first through hole 51. The connection end of the second connecting rod 4 and the push base 5 is provided with a second through hole. The connection end of the second connecting rod 4 and the push base 5 is also provided with a first fixing member 53, which passes through the second through hole and connects to the mounting hole 52. The first fixing member 53 can be a screw, and the corresponding mounting hole 52 is provided with an internal thread to fix the first fixing member 53 to the push base 5. The first fixing member 53 and the second through hole are clearance fit to ensure that the second connecting rod 4 can rotate relative to the push base 5.

[0034] Please see Figure 1-4 The mounting base 1 has a third through hole 11 and at least one fixing hole 12, which communicate with the third through hole 11. The pipette 10 is a central columnar structure. The diameter of the third through hole 11 can be greater than or equal to the diameter of the pipette 10 to allow the pipette 10 to pass through. At least one blind hole 101 is provided on the outer surface of the pipette 10. Part of the pipette 10 is located within the third through hole 11. A second fixing member 13 passes through the third through hole 11 and abuts against the blind hole 101 to fix the pipette 10 to the mounting base 1. That is, after the second fixing member 13 abuts against the blind hole 101, the sidewall of the pipette 10 away from the blind hole 101 abuts against the sidewall of the third through hole 11, thereby fixing the pipette 10 within the third through hole 11 of the mounting base 1.

[0035] The third through hole 11 can be a tapered hole, wider at the top and narrower at the bottom. The diameter of the upper end of the tapered hole is larger than the diameter of the pipette 10, and the diameter of the lower end of the tapered hole can be equal to or slightly smaller than the diameter of the pipette 10. In this way, when installing the pipette 10, the upper end of the tapered hole acts as a guide, facilitating the placement of the pipette 10 within the tapered hole. Then, the lower end of the tapered hole provides initial positioning of the pipette 10, allowing it to be subsequently fixed to the mounting base 1 using the second fixing member 13.

[0036] The pipette 10 can be a conical structure with a larger upper part and a smaller lower part. The maximum diameter of the upper end of the conical hole is less than or equal to the maximum diameter of the pipetting chamber, and the diameter of the lower end of the conical hole can be less than the minimum diameter of the pipette 10. This serves to initially limit the position of the pipette 10 when it is installed, and also prevents the deviation between the central axis of the pipette 10 and the central axis of the fixing base 1 from being too large after the pipette 10 is fixed on the mounting base using the second fixing member 13. This would affect the subsequent aspiration of the sample and the transfer of the aspirated sample to the detection card or observation slide at the detection position.

[0037] The second fixing member 13 can be a screw or bolt structure. Correspondingly, the inner wall of the fixing hole 12 is provided with an internal thread to facilitate the fixing of the second fixing member 13 to the fixing seat 1, and also to facilitate the subsequent maintenance or replacement of the pipette 10.

[0038] The second fixing member 13, fixing hole 12, and blind hole 101 can each be provided in multiples, such as 2, 3, or 4, to ensure that the pipette 10 can be securely fixed on the fixing base 1. In this embodiment, the second fixing member 13, fixing hole 12, and blind hole 101 can each be provided in pairs, and the second fixing member 13, fixing hole 12, and blind hole 101 are provided in a one-to-one correspondence. This two-point fixing ensures that the pipette 10 can be securely fixed on the fixing base 1, and also reduces manufacturing costs and improves the convenience of maintaining or replacing the pipette 10.

[0039] Please see Figure 5 The disposable needle 20 ejection device provided in this embodiment may further include a first translation mechanism 6 and a second translation mechanism 7. The fixed base 1 is disposed on the first translation mechanism 6, and the first translation mechanism 6 is disposed on the second translation mechanism 7. The first translation mechanism 6 is used to drive the fixed base 1 to move up and down, and the second translation mechanism 7 drives the first translation mechanism 6 to move left and right. This facilitates the pipette 10 to replace the used disposable needle 20 when the pusher 5 removes it, and also facilitates the transfer of the sample from the pipette 10 to the reaction cup or detection card at the detection position after the sample has been drawn.

[0040] The first translation mechanism 6 may include a first mounting plate 61, a second driving member 62, a first transmission assembly 63, and a first guide member 64; the first driving member 62, the first transmission assembly 63, and the first guide member 64 are disposed on the first mounting plate 61; the fixed seat 1 is connected to the first transmission assembly 63 and slidably connected to the first guide member 64; the first driving member 2 drives the first transmission assembly 63 to move, thereby driving the fixed seat 1 to slide on the first guide member 64.

[0041] The first transmission assembly 63 includes a first pulley 631, a second pulley 632, and a first belt 633; ​​the first pulley 631 is connected to the second driving member 62, the second pulley 632 is disposed on the first mounting plate 61, the first belt 633 is sleeved on the first pulley 631 and the second pulley 632, and the fixed seat 1 is connected to the first belt 633.

[0042] The second driving component 62 can be a motor, and the first pulley 631 is coaxially mounted on the output shaft of the motor. The first guide component 64 can be a guide rail, and a slider is provided on the corresponding fixed base 1 to achieve a sliding connection between the fixed base 1 and the first guide component 64.

[0043] The second translation mechanism 7 includes a second mounting plate 71, a third driving member 72, a second transmission assembly 73, and a second guide member 74; the third driving member 72, the second transmission assembly 73, and the second guide member 74 are disposed on the second mounting plate 71; the first mounting plate 61 is connected to the second transmission assembly 73 and is slidably connected to the second guide member 74; the third driving member 72 drives the second transmission assembly 73 to move, thereby driving the first translation mechanism 6 to slide on the second guide member 74.

[0044] The second transmission assembly 73 includes a third pulley 731, a fourth pulley 732, and a second belt 733; the third pulley 731 is connected to the third drive member 72, the third pulley 731 is disposed on the second mounting plate 71, the second belt 733 is sleeved on the third pulley 731 and the fourth pulley 732, and the second mounting plate 71 is connected to the second belt 733.

[0045] The third driving component 72 can also be a motor, and the second pulley 632 is coaxially mounted on the output shaft of the motor. The second guide component 74 can be a guide rail, and a slider is provided on the corresponding first mounting plate 61 to achieve a sliding connection between the first mounting plate 61 and the second guide component 74.

[0046] There can be two first guide members 64 and two second guide members 74; the two first guide members 64 are spaced apart on the first mounting plate 61; the two second guide members 74 are spaced apart on the second mounting plate 71. Specifically, the two first guide members 64 are symmetrically arranged on both sides of the first belt 633, and the two second guide members 74 are symmetrically arranged on both sides of the second belt 733, thereby ensuring the stability of the fixed seat 1 running on the first translation mechanism 6 and the stability of the first translation mechanism 6 running on the second translation mechanism 7.

[0047] On the other hand, this utility model also provides a sample analyzer, including the disposable needle 20 ejection device as described above. The sample analyzer can be a urine analyzer, a nucleic acid detection analyzer, or any other analytical device that requires the use of a disposable needle 20; this embodiment does not limit this.

[0048] For ease of explanation, the sample analyzer in this embodiment is a urine analyzer, which may further include a base, a disposable needle 20 carrying device, a sample carrying device, and a detection device. The disposable needle 20 carrying device, the disposable needle 20 ejection device, the sample carrying device, and the detection device are all disposed on the base. The disposable needle 20 carrying device is used to hold unused disposable needles 20 and used disposable needles 20; the sample carrying device is used to hold sample bottles or sample cups containing urine samples; the detection device holds a detection slide or detection card for detecting urine samples.

[0049] In use, the disposable needle 20 ejection device first removes an unused disposable needle 20 from the disposable needle 20 carrier and connects it to the pipette 10. Then, a urine sample is drawn from the sample vial or cup on the sample carrier, and the pipette 10 is moved above the detection device using the first translation mechanism 6 and the second translation mechanism 7, discharging the urine sample onto the detection slide or card. The detection device then performs the corresponding tests on the urine sample. Finally, the disposable needle 20 ejection device pushes the used disposable needle 20 back into the disposable needle 20 carrier and replaces it with an unused disposable needle 20.

[0050] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0051] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A needle pusher-out device, which is disposable, characterized in that, include: A fixed base, a first driving component, a first connecting rod, a second connecting rod, and a push base; A pipette is mounted on the fixed base, and the first driving component is mounted on the fixed base. One end of the first connecting rod is connected to the first driving member, and the other end is rotatably connected to the second connecting rod; the end of the second connecting rod away from the first connecting rod is rotatably connected to the push seat; the push seat is slidably connected to the pipette. In any state, the angle formed by the first link and the second link with the central axis of the pipette is greater than 0 degrees and less than 180 degrees.

2. A needle ejector according to claim 1 wherein: The push base is provided with a first through hole, the center line of the first through hole coincides with the central axis of the push base; the inner sidewall of the first through hole is slidably connected to the outer sidewall of the pipette.

3. A needle ejector according to claim 2, wherein: The push base is provided with a mounting hole, and the center line of the mounting hole is perpendicular to the center line of the first through hole. The second connecting rod is provided with a second through hole at the connection end with the push base; the second connecting rod and the push base are also provided with a first fixing member, which passes through the second through hole and is connected to the mounting hole.

4. The needle pusher-out device of claim 1, wherein: It also includes at least one second fastener; The mounting base is provided with a third through hole and at least one fixing hole, and the fixing hole communicates with the third through hole; At least one blind hole is provided on the outer side of the pipette; the pipette part is located in the third through hole, and the second fixing member passes through the third through hole and abuts against the blind hole to fix the pipette on the fixing base.

5. The needle pusher-out device of claim 1, wherein: It also includes a first translation mechanism and a second translation mechanism; the fixed base is disposed on the first translation mechanism and is used to drive the fixed base to move up and down; the first translation mechanism is disposed on the second translation mechanism and the second translation mechanism is used to drive the first translation mechanism to move left and right.

6. A needle ejector according to claim 5, wherein: The first translation mechanism includes a first mounting plate, a second driving component, a first transmission assembly, and a first guide component; The second driving member, the first transmission assembly, and the first guide member are disposed on the first mounting plate; the fixed base is connected to the first transmission assembly and slidably connected to the first guide member; The second driving member drives the first transmission assembly to move, thereby causing the fixed seat to slide on the first guide member.

7. A needle ejector according to claim 6, wherein: The first transmission assembly includes a first pulley, a second pulley, and a first belt; The first pulley is connected to the second drive component, the second pulley is mounted on the first mounting plate, the first belt is sleeved on the first pulley and the second pulley, and the fixed seat is connected to the first belt.

8. A disposable needle ejection device according to claim 7, characterized in that: The second translation mechanism includes a second mounting plate, a third driving component, a second transmission assembly, and a second guide component; The third driving component, the second transmission assembly, and the second guide component are disposed on the second mounting plate; the first mounting plate is connected to the second transmission assembly and is slidably connected to the second guide component. The second driving member drives the second transmission assembly to move, thereby causing the first translation mechanism to slide on the second guide member.

9. A disposable needle ejection device according to claim 8, characterized in that: The second transmission assembly includes a third pulley, a fourth pulley, and a second belt; The third pulley is connected to the third driving component. The third pulley is mounted on the second mounting plate. The second belt is sleeved on the third pulley and the fourth pulley. The second mounting plate is connected to the second belt.

10. A sample analyzer, characterized in that, Includes the disposable needle ejection device as described in any one of claims 1-9.

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