Sample addition device

Abstract

The application provides a sample adding device, which comprises a sample storage container, a lower part of the sample storage container being provided with a sample outlet; a sample adding shaft, the sample adding shaft being rotatably arranged in the sample storage container around an axis, a lower end of the sample adding shaft being inserted into the sample outlet, a side wall of the lower end of the sample adding shaft being provided with a sample adding groove, the sample adding groove being used for sample adding when the sample adding shaft rotates; and a sample adding driving element, the sample adding driving element being liftable between a lowered position and a raised position and rotatable around the axis, the sample adding driving element being connected with the sample adding shaft when the sample adding driving element moves to the lowered position, the sample adding driving element being separated from the sample adding shaft when the sample adding driving element moves to the raised position, an upper end of the sample adding shaft being provided with a convex rib, the sample adding driving element being provided with a downwardly extending driving pin, the driving pin being eccentrically arranged relative to the axis, and the driving pin being capable of abutting against a side wall of the convex rib when the sample adding driving element is in the lowered position. The difficulty of connection between the sample adding shaft and the sample adding driving element is reduced, so that the sample is prevented from being mistakenly added.

Description

Technical Field

[0001] This invention relates to the technical field of material addition devices, and more specifically, to a sample addition device. Background Technology

[0002] In the life sciences, powder or liquid addition is frequently required to meet the demands of automated sample dispensing during experiments. Existing sample dispensing devices mainly consist of a sample storage container, a dispensing shaft, and a dispensing drive. The sample storage container stores the sample to be added and has a sample outlet at its bottom. The dispensing shaft has a spiral dispensing groove. As the dispensing shaft rotates, the sample is discharged through the dispensing groove from the sample outlet. The dispensing drive is used to rotate the dispensing shaft.

[0003] The sample dispensing drive unit can not only rotate around its own axis but also move along its axis. When sample dispensing is required, the sample dispensing drive unit moves towards and connects to the sample dispensing shaft to transmit power. When sample dispensing stops, the sample dispensing drive unit disengages from the sample dispensing shaft, ceasing power transmission. In the prior art, the sample dispensing shaft and the sample dispensing drive unit are often connected by polygonal snap-fit ​​connectors. For example, the end of the sample dispensing shaft may have a hexagonal slot, and the end of the sample dispensing drive unit may have a hexagonal protrusion. When sample dispensing is required, the protrusion is inserted into the slot, thereby transmitting power.

[0004] However, the existing connection structure requires high precision in fitting. If the fitting is not accurate, the protrusion will not only fail to be inserted into the slot, but will also push the sample dispensing shaft out, resulting in the sample being added incorrectly and affecting the sample dispensing accuracy. Summary of the Invention

[0005] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a sample dispensing device is provided, comprising: a sample storage container having a sample outlet at its lower part; a sample dispensing shaft rotatably disposed within the sample storage container about its axis, the lower end of the sample dispensing shaft being inserted into the sample outlet, a sample dispensing groove being provided on the side wall of the lower end of the sample dispensing shaft, the sample dispensing groove dispensing sample as the sample dispensing shaft rotates; and a sample dispensing drive member, which is movable between a lowering position and an upper position and rotatable about an axis, wherein when the sample dispensing drive member moves to the lowering position, it is connected to the sample dispensing shaft; and when the sample dispensing drive member moves to the upper position, it is separated from the sample dispensing shaft; a rib is provided at the upper end of the sample dispensing shaft, and a downwardly extending drive pin is provided on the sample dispensing drive member, the drive pin being eccentrically disposed relative to the axis, wherein the drive pin abuts against the side wall of the rib when the sample dispensing drive member is in the lowering position.

[0006] Therefore, the sample dispensing device provided in this embodiment of the invention reduces the connection difficulty between the sample dispensing shaft and the sample dispensing drive component by setting a drive pin and a rib. This improves the accuracy of the connection between the sample dispensing shaft and the sample dispensing drive component compared to the prior art, thereby avoiding incorrect sample addition and improving the sample dispensing accuracy of the device.

[0007] For example, there are multiple ribs, which are spaced apart around the axis.

[0008] For example, the circumferential dimension of the gap between adjacent ribs is greater than the circumferential dimension of the drive pin, so that when the drive pin is inserted into the gap, it is spaced apart from at least one adjacent rib; and / or the number of ribs is four and two adjacent ribs are perpendicular to each other.

[0009] For example, the rib extends in the radial direction.

[0010] For example, the projection of the top of the rib onto a plane perpendicular to the radial direction is an inverted V shape.

[0011] For example, the drive pin can move up and down between a retracted position and an extended position. When the drive pin is in the extended position, it extends beyond the sample feeding drive to abut against the side wall of the rib. The retracted position is higher than the extended position.

[0012] For example, the drive pin is movably disposed on the sample feeding drive in the vertical direction, and an elastic element is disposed between the sample feeding drive and the drive pin, so that the drive pin is held in the extended position under the action of the elastic element.

[0013] For example, the sample feeding drive is provided with an opening extending in a vertical direction. A first limiting boss is provided on the inner side wall of the lower end of the opening. A drive pin passes through the opening. A second limiting boss is provided on the outer side wall of the drive pin. An elastic member is located between the second limiting boss and the top wall of the opening. The second limiting boss abuts against the top surface of the first limiting boss under the action of the elastic member.

[0014] For example, the bottom of the drive pin is in the shape of an inverted cone or frustum.

[0015] For example, there are two drive pins, located on both sides of the axis.

[0016] For example, the sample application device also includes a lifting device and a driver disposed on the lifting device. The driver is connected to the sample application drive to drive the sample application drive to rotate about an axis. The sample application drive can be raised and lowered between a lower position and an upper position under the drive of the lifting device.

[0017] For example, the sample dispensing shaft is movable along the axis between the closed position of the sample outlet and the sample dispensing position of the sample outlet. The upper and lower ends of the sample dispensing groove are located inside and outside the sample storage container, respectively, when the sample dispensing shaft is in the sample dispensing position. When the sample dispensing drive is in the descending position, it abuts against the top of the rib to push the sample dispensing shaft to move to the sample dispensing position.

[0018] For example, the sample dispensing groove is a threaded groove, and the lower end of the sample dispensing shaft has a plug located below the sample dispensing groove. The plug is blocked in the sample outlet when the sample dispensing shaft is in the closed position and extends to the outside of the sample storage container when the sample dispensing shaft is in the sample outlet position.

[0019] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0020] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures,

[0022] Figure 1 A cross-sectional view of a sample dispensing device according to an exemplary embodiment of the present invention;

[0023] Figure 2-3 for Figure 1 Multiple perspective views of the sample application device shown; and

[0024] Figure 4 for Figure 1 A portion of the perspective view of the sample loading shaft shown.

[0025] The above figures include the following reference numerals:

[0026] 100. Sample storage container; 101. Sample outlet; 200. Sample dispensing shaft; 201. Sample dispensing groove; 202. Blocking part; 210. Rib; 300. Sample dispensing drive; 301. Opening; 310. Drive pin; 320. Elastic element; 330. First limiting boss; 340. Second limiting boss; 400. Driver. Detailed Implementation

[0027] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0028] According to one aspect of the present invention, a sample dispensing device is provided, such as... Figure 1-3 As shown. The sample application device may include a sample storage container 100, a sample application shaft 200, and a sample application drive 300.

[0029] The sample storage container 100 can be used to store the material to be sampled. A sample outlet 101 can be provided at the bottom of the sample storage container 100. The material can be discharged from the sample outlet 101. The sample storage container 100 can be barrel-shaped, funnel-shaped, etc., without specific limitations.

[0030] The sample dispensing shaft 200 is rotatably disposed within the sample storage container 100 about its axis. The lower end of the sample dispensing shaft 200 can be inserted into the sample outlet 101. A sample dispensing groove 201 can be provided on the side wall of the lower end of the sample dispensing shaft 200. The sample dispensing groove 201 can dispense the sample as the sample dispensing shaft 200 rotates. In some embodiments, the sample dispensing groove 201 can be a threaded groove disposed on the side wall of the sample dispensing shaft 200. When the sample dispensing shaft 200 rotates about its axis, the sample dispensing groove 201 can continuously deliver the material from the sample storage container 100 from the sample outlet 101. Of course, it is understood that the structure of the sample dispensing groove 201 is not limited to a threaded groove. The sample dispensing groove 201 can also be a vertical groove or a horizontal groove, and the material can be thrown out of the sample outlet by centrifugation or other means when the sample dispensing shaft rotates; further details will not be elaborated here.

[0031] The sample dispensing drive 300 can have a lowering position and a rising position. The sample dispensing drive 300 can move up and down between the lowering and rising positions. The sample dispensing drive 300 can also rotate about an axis. Typically, when the sample dispensing device is dispensing a sample, the sample dispensing drive 300 can move to the lowering position and connect with the sample dispensing shaft 200, transmitting power to the shaft. When the sample dispensing device stops dispensing a sample, the sample dispensing drive 300 can move to the rising position, disengaging from the shaft and stopping the transmission of power from the drive 300 to the shaft. The sample dispensing device can control the amount of material dispensed by moving the sample dispensing drive 300 between the lowering and rising positions and by rotating it about an axis.

[0032] In this invention, a rib 210 may be provided at the upper end of the sample dispensing shaft 200. A downwardly extending drive pin 310 may be provided on the sample dispensing drive member 300. The drive pin 310 may be eccentrically positioned relative to the axis. Eccentricity means that the drive pin is not located on the axis of the sample dispensing device, and the drive pin shaft 310 can rotate around the axis when the sample dispensing drive member 300 rotates. The drive pin 310 can abut against the side wall of the rib 210 when the sample dispensing drive member 300 is in the descending position. The shapes of the drive pin 310 and the rib 210 are not specifically limited. There may be no mating relationship between the drive pin 310 and the rib 210, that is, their shapes can be arbitrary. In some embodiments, there may be one drive pin 310 and one rib 210. This makes the mating of the drive pin 310 and the rib 210 easier. In other embodiments, there may be multiple ribs 210, spaced apart around the axis. Figure 2-3 As shown, there are two drive pins 310, located on both sides of the axis. The sample dispensing shaft 200 can have four ribs 210. A gap is formed between adjacent ribs 210. When the sample dispensing drive 300 moves to the lowered position, the drive pin 310 can extend into the gap between the ribs 210, causing the sidewall of the drive pin 310 to abut against the sidewall of the rib 210. After abutment, the drive pin 310 and the rib 210 can transmit power. Having two drive pins 310 ensures even force distribution on the sample dispensing shaft 200 and the sample dispensing drive 300 when transmitting power, extending the service life of the rotating components. Having multiple ribs 210 spaced apart around the axis increases the probability of correct connection between the drive pin 310 and the rib 210. In summary, when the sample dispensing drive 300 moves to the lowered position, the drive pin 310 can easily and correctly connect with the rib 210. The number of drive pins 310 and ribs 210 is merely illustrative and can be arbitrarily set according to actual usage needs.

[0033] Therefore, the sample dispensing device provided in this embodiment of the invention reduces the connection difficulty between the sample dispensing shaft 200 and the sample dispensing drive component 300 by setting the drive pin 310 and the rib 210. This improves the accuracy of the connection between the sample dispensing shaft 200 and the sample dispensing drive component 300 compared to the prior art, thereby avoiding incorrect sample addition and improving the sample dispensing accuracy of the device.

[0034] For example, the circumferential dimension of the gap between adjacent ribs 210 can be larger than the circumferential dimension of the drive pin 310, so that when the drive pin 310 is inserted into the gap, it is spaced apart from at least one adjacent rib. That is, when the drive pin 310 is inserted into the gap, there can be a gap between the drive pin 310 and the rib 210. With this setting, when the sample dispensing drive 300 moves to the descending position, the probability of the drive pin 310 colliding with the rib 210 can be reduced, thereby ensuring that the drive pin 310 and the rib 210 are in the correct connection relationship, avoiding the sample being mistakenly added due to the collision between the drive pin 310 and the rib 210, and improving the sample dispensing accuracy of the sample dispensing device.

[0035] For example, such as Figure 2-3 As shown, there can be four ribs 210, with adjacent ribs 210 perpendicular to each other. That is, the four ribs 210 can form a cross shape. Because the circumferential dimension of the drive pin 310 is smaller than the circumferential dimension of the gap between two adjacent ribs 210, when the sample feeding drive 300 moves to the descending position, the drive pin 310 and the ribs 210 may not be in contact, but rather there may be a certain distance between them. When the sample feeding drive 300 rotates, the power transmission to the sample feeding shaft 200 will have a certain delay, affecting the sample feeding accuracy. One way to reduce this delay is to increase the number and density of the ribs 210; however, this would increase the probability of collision between the drive pin 310 and the ribs 210. The ribs 210 configured in this way can reduce the probability of collision between the drive pin 310 and the ribs 210, thereby reducing the power transmission delay and improving the sample feeding accuracy.

[0036] For example, the rib 210 can extend in the radial direction. In this way, when the drive pin 310 pushes the rib 210, the thrust acting on the rib 210 is perpendicular to the side of the rib 210, which can more efficiently transmit the power of the sample feeding drive 300 to the sample feeding shaft 200.

[0037] For example, the top of the rib 210 can project into an inverted V shape onto a plane perpendicular to the radial direction. Figure 1 As shown, the top of the rib 210 can be pointed. In this way, when the sample feeding drive 300 moves to the lower position, even if the drive pin 310 comes into contact with the rib 210, the top of the rib 210 will force the drive pin 310 to slide to one side of the rib 210, thus preventing the drive pin 310 from staying on the top of the rib 210 and reducing the occurrence of incorrect sample feeding.

[0038] Exemplarily, the drive pin 310 may have a retracted position and an extended position. The drive pin 310 is movable between the retracted and extended positions. When in the extended position, the drive pin 310 extends beyond the sample dispensing drive 300 to abut against the sidewall of the rib 210. The drive pin 310 is higher in the retracted position than in the extended position. In some embodiments, the sample dispensing drive 300 may be provided with an opening 301 in which the drive pin 310 is movably disposed. The sample dispensing drive 300 may also naturally be in the extended position under gravity or external force. When the sample dispensing drive 300 is in the lowered position and the drive pin 310 abuts against the top of the rib 210, the drive pin 310 can be pushed into the retracted position. This reduces the occurrence of incorrect sample dispensing.

[0039] Exemplarily, the drive pin 310 can be movably disposed on the sample feeding drive member 300 in a vertical direction. An elastic member 320 can be disposed between the sample feeding drive member 300 and the drive pin 310. The drive pin 310 can be held in the extended position under the action of the elastic member 320. In some embodiments, the elastic member 320 can be a spring, which can be sleeved on the drive pin 310. In this way, the drive pin 310 can be held in the extended position in its natural state, avoiding retraction when transmitting power to the sample feeding shaft 200, which would affect the sample feeding accuracy.

[0040] For example, the sample feeding drive member 300 may have an opening 301 extending vertically. A first limiting boss 330 may be provided on the inner sidewall of the lower end of the opening 301. The drive pin 310 may pass through the opening 301. A second limiting boss 340 may be provided on the outer sidewall of the drive pin 310. An elastic member 320 is located between the second limiting boss 340 and the top wall of the opening 301. The second limiting boss 340 abuts against the top surface of the first limiting boss 330 under the action of the elastic member 320. With this arrangement, the drive pin 310 can be kept in the extended position in its natural state without falling off. This structure is simple and easy to implement.

[0041] For example, the bottom of the drive pin 310 can be an inverted cone or frustum shape. With this setting, when the sample feeding drive 300 moves to the lower position, even if the drive pin 310 comes into contact with the rib 210, the drive pin 310 will slide to one side of the rib 210, avoiding the drive pin 310 from staying on the top of the rib 210 and reducing the occurrence of incorrect sample feeding.

[0042] Exemplarily, the sample application device may further include a lifting device (not shown) and a driver 400 disposed on the lifting device. The driver 400 can be connected to the sample application drive 300 to drive the sample application drive 300 to rotate about an axis. The sample application drive 300 can rise and fall between a lowered position and a raised position under the drive of the lifting device. In some embodiments, the lifting device may include components such as a gear rack or a telescopic cylinder, without specific limitation. The driver 400 can be any motor. The motor can drive the sample application drive 300 to rotate, and the lifting device can drive the sample application drive 300 and the driver 400 to move and rise and fall. In this way, the rotation of the sample application drive 300 is not limited by its position, the structure is simple, and it is easy to implement.

[0043] Exemplarily, the sample dispensing shaft 200 is movable along its axis between a closed position where the sample outlet 101 is closed and a sample dispensing position where the sample outlet 101 is extended. At the sample dispensing position, the upper end of the sample dispensing groove 201 may be inside the sample storage container 100, and the lower end of the sample dispensing groove 201 may be outside the sample storage container 100. When the sample dispensing drive member 300 is in the lowered position, it may abut against the top of the protruding rib 210 to push the sample dispensing shaft 200 to the sample dispensing position. In an embodiment where the sample dispensing groove 201 is a spiral groove, when the sample dispensing shaft 200 moves to the sample dispensing position, the upper end of the spiral groove is inside the sample storage container 100, and the lower end of the spiral groove is outside the sample storage container 100. Thus, when the sample dispensing shaft 200 rotates, the material inside the sample storage container 100 can be discharged. Of course, in order to move the sample loading shaft 200 to the sample dispensing position, the sample loading drive component 300 can abut against the top of the rib 210, rather than being pushed against the sample loading drive component 300 by the drive pin 310. In this way, the drive pin 310 is only used to transmit power, while the sample loading drive component 300 is only used to push the rib 210, causing the sample loading shaft 200 to move up and down. This independent division of functions among the components makes their operation more efficient and more rational.

[0044] Furthermore, such as Figure 4As shown, the sample loading groove 201 is a threaded groove. The lower end of the sample loading shaft 200 may have a plug 202 located below the sample loading groove 201. The plug 202 can block the sample outlet 101 when the sample loading shaft 200 is in the closed position and extend to the outside of the sample storage container 100 when the sample loading shaft 200 is in the sample dispensing position. The plug 202 can be provided at the lower end of the sample loading shaft 200 and is plug-shaped to block the sample outlet 101. In the sample dispensing position, the sample loading shaft 200 moves downward, the plug 202 can disengage from the sample outlet 101, and the sample outlet 101 is opened. In the closed position, the sample loading shaft 200 moves upward, and the plug 202 seals the sample outlet 101. In this way, when the sample loading device is not loading, the plug 202 can seal the sample outlet 101, preventing material from continuing to fall from the sample outlet 101 and improving the sample dispensing accuracy.

[0045] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0046] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0048] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0049] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sample adding device, comprising: a sample storage container, a lower portion of the sample storage container being provided with a sample outlet; a sample adding shaft, the sample adding shaft being rotatably arranged in the sample storage container about an axis of the sample adding shaft, a lower end of the sample adding shaft being inserted into the sample outlet, a side wall of the lower end of the sample adding shaft being provided with a sample adding groove, the sample adding groove being used for sample adding when the sample adding shaft rotates; a sample adding driving member, the sample adding driving member being liftable between a lowered position and a raised position and rotatable about the axis, characterized in that the sample adding driving member is connected with the sample adding shaft when the sample adding driving member is moved to the lowered position, and the sample adding driving member is separated from the sample adding shaft when the sample adding driving member is moved to the raised position; a protruding rib is arranged on an upper end of the sample adding shaft, a driving pin extending downward is arranged on the sample adding driving member, the driving pin is arranged eccentrically relative to the axis, and the driving pin can abut against a side wall of the protruding rib when the sample adding driving member is in the lowered position. The protruding rib is in plurality and is arranged at intervals around the axis.

2. The sample application device of claim 1, wherein, 3.The sample adding device according to claim 2, characterized in that: a circumferential dimension of a gap between adjacent protruding ribs is greater than a circumferential dimension of the driving pin, so that the driving pin is spaced apart from at least one adjacent protruding rib when the driving pin is inserted into the gap; and / or the number of the protruding ribs is four, and two adjacent protruding ribs are perpendicular to each other. The protruding rib extends along a radial direction. A projection of a top of the protruding rib on a plane perpendicular to the radial direction is in inverted V shape.

4. The sample application device of claim 1, wherein The driving pin is liftable between a retracted position and an extended position, the driving pin extends out of the sample adding driving member to abut against the side wall of the protruding rib when the driving pin is in the extended position, and the retracted position is higher than the extended position.

5. The sample application device of claim 4, wherein, The driving pin is movably arranged on the sample adding driving member along a vertical direction, a resilient member is arranged between the sample adding driving member and the driving pin, and the driving pin is kept in the extended position under the action of the resilient member.

6. The sample application device of claim 1, wherein, An opening extending along the vertical direction is arranged in the sample adding driving member, an inner side wall of a lower end of the opening is provided with a first limiting boss, the driving pin is arranged in the opening, an outer side wall of the driving pin is provided with a second limiting boss, the resilient member is located between the second limiting boss and a top wall of the opening, and the second limiting boss abuts against a top surface of the first limiting boss under the action of the resilient member.

7. The sample application device of claim 6, wherein, A bottom of the driving pin is in inverted conical or circular truncated conical shape.

8. The sample application device of claim 7, wherein, The number of the driving pins is two, and the driving pins are located on two sides of the axis.

9. The sample application device of claim 1, wherein, The sample adding device further comprises a lifting device and a driver arranged on the lifting device, the driver is connected with the sample adding driving member to drive the sample adding driving member to rotate about the axis, and the sample adding driving member is liftable between the lowered position and the raised position under the driving of the lifting device.

10. The sample application device of claim 1, wherein, 12.The sample adding device according to claim 1, characterized in that:

11. The sample application device of claim 1, wherein, ​ ​ The sample adding shaft is movable along the axis between a closed position closing the sample outlet and a sample outlet position extending the sample outlet, the upper end and the lower end of the sample adding groove are located inside and outside the sample storage container respectively when the sample adding shaft is in the sample outlet position, The sample adding driving member abuts against the top of the convex rib to push the sample adding shaft to move to the sample outlet position when the sample adding driving member is in the lowered position.

13. The sample application device of claim 12, wherein, The sample adding groove is a threaded groove, the lower end of the sample adding shaft has a plug part below the sample adding groove, The plug part is plugged in the sample outlet when the sample adding shaft is in the closed position and extends to the outside of the sample storage container when the sample adding shaft is in the sample outlet position.

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