Test tube ejection mechanism

Abstract

The utility model relates to the technical field of medical equipment, and discloses a test tube ejection mechanism, which is applied to jacking test tubes from a test tube storage box with a hollow bottom and comprises a base provided with an ejection structure. The test tube storage box has a first state in which the test tube storage box is matched with the base in an inserting manner and all odd rows of test tube assemblies are jacked from the test tube storage box at the same time, a second state in which the test tube storage box is matched with the base in an inserting manner and all even rows of test tube assemblies are jacked from the test tube storage box at the same time, and a third state in which the test tube storage box is separated from the base; all odd-numbered rows of test tube assemblies or all even-numbered rows of test tube assemblies can be jacked at the same time at a time, and the test tube assemblies can be clamped and taken out conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely relates to a test tube ejection mechanism. BACKGROUND

[0002] The test tube storage box is usually provided with a plurality of test tube assemblies spaced apart along a first direction, and the plurality of test tube assemblies arranged along the first direction are sequentially numbered as 1, 2, 3,..., n-1, and n; wherein the test tube assembly numbered as an even number is an even test tube assembly, and the test tube assembly numbered as an odd number is an odd test tube assembly. In order to save space, the test tubes are arranged closely in the test tube storage box, and the top end surfaces of all the test tubes are located on the same horizontal plane. During normal use, there are three ways to take out the test tubes:

[0003] 1. Manual test tube removal, code scanning, cap twisting, liquid addition, and cap closing actions. This method can remove any one of the 96 cryopreservation tubes in a box, but the test tubes are closely arranged in the test tube storage box, making it difficult to remove them one by one.

[0004] 2. Manual test tube removal, code scanning, and returning to the test tube box. During the opening, liquid addition, and closing actions, the test tubes are not removed or ejected. An 8-channel test tube cap opening machine is used to simultaneously open the caps of 8 test tubes in the odd or even row, then add liquid, and then use the 8-channel test tube cap opening machine to close the caps. However, this method still requires manual removal of the test tubes for code scanning before opening the caps. The top end surfaces of all the test tubes are located on the same horizontal plane, and it is still difficult to remove the test tubes.

[0005] 3. Manual test tube removal, code scanning, and returning to the test tube box. During the opening, liquid addition, and closing actions, the test tubes are not removed or ejected. A 96-channel test tube cap opening machine is used to simultaneously open the caps of 96 test tubes, but this method still requires manual removal of the test tubes for code scanning before opening the caps. The top end surfaces of all the test tubes are located on the same horizontal plane, and it is still difficult to remove the test tubes.

[0006] In order to solve the problem of difficult test tube removal, the related document CN218422926U discloses a test tube lifting assembly. According to the position of the test tube to be removed in the test tube box, a support member is installed on the base installation member. Then, the test tube box is placed on the base installation member with the corresponding support member installed, and the test tube corresponding to the support member is lifted by the support part protruding from the bearing surface, so that the lifted test tube is higher than the other test tubes in the test tube box. Although the above-mentioned related document can conveniently remove the test tube, the support member needs to be manually installed on the base installation member each time, which is inconvenient to use. SUMMARY

[0007] Therefore, the utility model provides a test tube ejection mechanism to solve the problem of inconvenient use caused by the need of manually installing the supporting and toping component on the base installation component every time the test tube is taken out.

[0008] The utility model provides a test tube ejection mechanism is applied to the test tube storage box with hollow bottom and is used for lifting the test tube, and the test tube ejection mechanism comprises:

[0009] The base is provided with an ejection structure.

[0010] The test tube storage box has a first state and a second state of being inserted with the base; when the test tube storage box is in the first state, the ejection structure cooperates with the odd row test tube assembly and lifts the odd row test tube assembly from the test tube storage box; when the test tube storage box is in the second state, the ejection structure cooperates with the even row test tube assembly and lifts the even row test tube assembly from the test tube storage box.

[0011] The utility model provides a test tube ejection mechanism, and at least has the following beneficial effects:

[0012] The base is provided with an ejection structure; when the even row test tube assembly needs to be lifted from the test tube storage box for clamping, the test tube storage box can be switched to the second state to make all the even row test tube assemblies be lifted at the same time and have a height displacement relative to the test tube storage box, so that all the even row test tube assemblies can be clamped and taken out for scanning, liquid adding and cover closing; when the odd row test tube assembly needs to be lifted from the test tube storage box for clamping, the test tube storage box can be switched to the first state to make all the odd row test tube assemblies be lifted at the same time and have a height displacement relative to the test tube storage box, so that all the odd row test tube assemblies can be clamped and taken out for scanning, liquid adding and cover closing; the whole process of clamping and taking out the odd row test tube assembly and the even row test tube assembly is relatively low in difficulty, and the time for clamping and taking out the test tube from the test tube storage box is obviously shortened.

[0013] In an alternative embodiment, the ejection structure comprises a plurality of rows of needle assemblies arranged at intervals in the first direction, and the number of the needle assemblies is at least half of the sum of the number of the odd row test tube assemblies and the number of the even row test tube assemblies, and the spacing between two adjacent rows of the needle assemblies is the same as the spacing between two adjacent rows of the even row test tube assemblies.

[0014] In an alternative embodiment, a material rack is further included for placing the test tube storage box, the test tube storage box is inserted into and separated from the base through the material rack; a through slot is formed in the middle of the material rack in the vertical direction, the through slot is used for the ejection structure to pass through and lift the odd row test tube assembly or the even row test tube assembly from the test tube storage box; the first direction and the vertical direction are perpendicular to each other.

[0015] In an alternative embodiment, one of the base and the material rack is provided with a first positioning plug-in assembly and a second positioning plug-in assembly, and the other is provided with a third positioning plug-in assembly; when the material rack is in the first state, the third positioning plug-in assembly is inserted into the first positioning plug-in assembly; when the material rack is in the second state, the third positioning plug-in assembly is inserted into the second positioning plug-in assembly.

[0016] In an alternative embodiment, the third positioning plug-in assembly includes two spaced-apart first positioning holes arranged on the end face of the material rack facing the base, the first positioning plug-in assembly includes a first positioning pin assembly arranged on the base, and the first positioning pin assembly matches the two first positioning holes; the second positioning plug-in assembly includes a second positioning pin assembly arranged on the base, and the second positioning pin assembly matches the two first positioning holes;

[0017] Or, the third positioning plug-in assembly includes two spaced-apart second positioning holes arranged on the end face of the base facing the material rack, the first positioning plug-in assembly includes a third positioning pin assembly arranged on the material rack, and the third positioning pin assembly matches the two second positioning holes; the second positioning plug-in assembly includes a fourth positioning pin assembly arranged on the material rack, and the fourth positioning pin assembly matches the two second positioning holes;

[0018] Or, the third positioning plug-in assembly includes two spaced-apart fifth positioning pins arranged on the end face of the material rack facing the base, the first positioning plug-in assembly includes a third positioning hole assembly arranged on the base, and the third positioning hole assembly matches the two fifth positioning pins; the second positioning plug-in assembly includes a fourth positioning hole assembly arranged on the base, and the fourth positioning hole assembly matches the two fifth positioning pins;

[0019] Or, the third positioning pair of plug-in assemblies includes two spaced sixth positioning pins arranged on the end face of the base towards the material rack, the first positioning pair of plug-in assemblies includes a fifth positioning hole assembly arranged on the material rack, the fifth positioning hole assembly is matched with the two sixth positioning pins, and the second positioning pair of plug-in assemblies includes a sixth positioning hole assembly arranged on the material rack, and the sixth positioning hole assembly is matched with the two sixth positioning pins.

[0020] In an optional embodiment, the base is provided with first limiting assemblies in a second direction relative to the base, and the two first limiting assemblies are used for abutting two side faces of the material rack in the second direction, and the first direction and the second direction are perpendicular to each other.

[0021] In an optional embodiment, the first positioning pin assembly and / or the second positioning pin assembly are detachably connected to the base.

[0022] In an optional embodiment, the third positioning pin assembly and / or the fourth positioning pin assembly are detachably connected to the material rack.

[0023] In an optional embodiment, the fifth positioning pin is detachably connected to the material rack.

[0024] In an optional embodiment, the sixth positioning pin is detachably connected to the base.

[0025] In an optional embodiment, each row of the plurality of needle assemblies includes a plurality of needles arranged in a second direction relative to the base, and the first direction and the second direction are perpendicular to each other; and the needle is detachably connected to the base.

[0026] In an optional embodiment, the base is provided with a screw rod corresponding to the position of the needle, and the needle is provided with a first internal threaded hole in the end of the needle towards the base, and the first internal threaded hole is matched with the screw rod.

[0027] Or, the base is provided with a second internal threaded hole corresponding to the position of the needle, and the needle is provided with an external threaded part on the sidewall of the end of the needle towards the base, and the external threaded part is matched with the second internal threaded hole.

[0028] In an optional embodiment, the needle is provided with a first part at one end of the needle towards the base, and a second part at the other end, and the outer diameter of the second part is smaller than the outer diameter of the first part.

[0029] In an optional embodiment, the material rack is provided with first limiting blocks in a first direction relative to the material rack, and the two first limiting blocks are used for abutting two side faces of the test tube storage box in the first direction.

[0030] And / or, the material rack is provided with a second limiting assembly in the second direction at intervals, and the two second limiting assemblies are used for abutting the two side surfaces of the test tube storage box in the second direction.

[0031] And / or, the material rack is provided with two hand-held pieces at intervals at one end away from the base, and the surface of the hand-held piece is provided with a hollow part. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.

[0033] Figure 1 It is the three-dimensional structure schematic view of the material rack in the first state in one embodiment of the utility model;

[0034] Figure 2 It is Figure 1 The schematic view of the main view structure of the section;

[0035] Figure 3 It is Figure 1 The three-dimensional structure schematic view of the material rack in the second state in

[0036] Figure 4 It is Figure 1 The structure schematic view of the material rack and the test tube storage box in

[0037] Figure 5 It is Figure 1 The structure schematic view of the material rack in

[0038] Figure 6 It is Figure 1 The structure schematic view of the base in

[0039] Figure 7 It is Figure 6 The structure schematic view of the first limiting assembly being removed;

[0040] Figure 8 It is Figure 6 The structure schematic view of the top pin being provided as a cylindrical pin in

[0041] Figure 9 It is the three-dimensional structure schematic view of the test tube storage box in one embodiment of the utility model;

[0042] Figure 10The utility model discloses a stereogram structure schematic diagram of material rack in the first state in another embodiment of the utility model,

[0043] Figure 11 For Figure 10 The utility model discloses a stereogram structure schematic diagram of material rack in the second state in another embodiment of the utility model,

[0044] Figure 12 For Figure 10 The utility model discloses a structure schematic diagram of material rack and test tube storage box assembly in another embodiment of the utility model,

[0045] Figure 13 For Figure 10 The utility model discloses a structure schematic diagram of base in another embodiment of the utility model.

[0046] Mark explanation:

[0047] 100-test tube storage box, 110-odd row test tube component, 120-even row test tube component,

[0048] 200-base, 210-first positioning pin, 220-second positioning pin, 230-sixth positioning pin, 240-first limiting component, 241-first limiting piece, 250-screw rod,

[0049] 300-ejector pin component, 310-ejector pin, 311-first part, 312-second part,

[0050] 400-material rack, 410-slot, 420-first positioning hole, 430-fifth positioning hole, 440-sixth positioning hole, 450-first limiting block, 451-first inclined surface, 460-second limiting component, 461-second limiting block, 462-second inclined surface, 470-handling piece, 471-hollow part. Specific implementation

[0051] In order to make the utility model embodiment's purpose, technical scheme and advantage more clear, below will combine the drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly, completely described, obviously, the described embodiment is the part embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments that the person skilled in the art obtains without making the creative labor are all within the scope of the utility model protection.

[0052] In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the embodiments, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.

[0054] The embodiments of the utility model will be described below in combination with Figures 1 to 13

[0055] According to the test tube ejection mechanism provided by the embodiments of the utility model, the test tube storage box 100 is applied to the test tube from the bottom hollow, and specifically, the test tube storage box 100 is provided with twelve rows of containing lattice assemblies along the first direction, each row of containing lattice assemblies includes eight containing lattices arranged along the second direction, and ninety-six test tubes are embedded in the containing lattices one by one and supported by the containing lattices, so that every eight test tubes arranged along the second direction sequentially form a row of test tube assemblies, that is, the ninety-six test tubes are sequentially arranged in the test tube storage box 100 along the first direction as twelve rows of test tube assemblies; twelve rows of test tube assemblies arranged along the first direction are numbered as 1, 2, 3... 10, 11, 12 respectively, wherein the row of test tube assemblies numbered as even numbers is even row test tube assembly 120, and the row of test tube assemblies numbered as odd numbers is odd row test tube assembly 110.

[0056] ​The ejection mechanism comprises a base 200 provided with an ejection structure, specifically, the ejection structure comprises multiple rows of ejector pin assemblies 300 arranged at intervals along a first direction, the number of the ejector pin assemblies 300 is at least half of the number of the test tube assemblies, specifically, the ejector pin assemblies 300 are arranged in six rows, the interval between two adjacent rows of the ejector pin assemblies 300 is the same as the interval between two adjacent rows of the even rows of test tube assemblies 120; the test tube storage box 100 has a first state of being inserted into the base 200, a second state of being inserted into the base 200, and a third state of being separated from the base 200; as shown in Figure 1 and Figure 2 When the test tube storage box 100 is in the first state, the ejector pin assemblies 300 are matched with the accommodation cells containing the odd rows of test tube assemblies 110 and lift the odd rows of test tube assemblies 110 from the test tube storage box 100; as shown in Figure 3 When the test tube storage box 100 is in the second state, the ejector pin assemblies 300 are matched with the accommodation cells containing the even rows of test tube assemblies 120 and lift the even rows of test tube assemblies 120 from the test tube storage box 100.

[0057] The test tube ejection mechanism of the embodiment can conveniently lift and hold out all the even rows of test tube assemblies 120 for scanning, adding liquid, closing the cover and other operations by switching the test tube storage box 100 from the third state to the second state to make all the even rows of test tube assemblies 120 be lifted and have a height displacement relative to the test tube storage box 100 when the even rows of test tube assemblies 120 need to be lifted from the test tube storage box 100 for clamping; the test tube ejection mechanism of the embodiment can conveniently lift and hold out all the odd rows of test tube assemblies 110 for scanning, adding liquid, closing the cover and other operations by switching the test tube storage box 100 from the third state to the first state to make all the odd rows of test tube assemblies 110 be lifted and have a height displacement relative to the test tube storage box 100 when the odd rows of test tube assemblies 110 need to be lifted from the test tube storage box 100 for clamping; the whole process of lifting and holding out the odd rows of test tube assemblies 110 and the even rows of test tube assemblies 120 is of low difficulty and significantly shortens the time of clamping and holding out the test tubes from the test tube storage box 100.

[0058] It can be understood that the first direction described herein is any direction on a horizontal plane, the second direction is a direction perpendicular to the first direction on the same horizontal plane, and the vertical direction is a direction perpendicular to the horizontal plane. For ease of description, the embodiment takes Figure 1The first direction, the second direction and the vertical direction shown in the figures are described as the first direction, the second direction and the vertical direction, but should not be understood as explicit limitation of the first direction and the second direction. In specific applications, the first direction can also be the second direction. Figure 1 The second direction shown in the figures.

[0059] It can be understood that the number of the test tube assemblies refers to the sum of the number of the odd row test tube assemblies 110 and the number of the even row test tube assemblies 120.

[0060] It should be noted that the jacking described herein refers to the displacement of the test tube from the original holding grid in the direction away from the base 200, which can make the corresponding test tube protrude from the test tube storage box 100, that is, the top end of the jacked test tube is higher than the top end of the unjacked test tube.

[0061] In specific applications, forty-eight test tubes can also be placed in the test tube storage box 100 at one time, that is, the test tube storage box 100 is spaced apart along the first direction by twelve rows of holding grid assembly, each row of holding grid assembly includes four holding grids spaced apart along the second direction, and forty-eight test tubes are embedded in the holding grids one by one and supported by the holding grids, so that every four test tubes spaced apart along the second direction form a row of test tube assemblies, thereby arranging forty-eight test tubes along the first direction by twelve rows of test tube assemblies in the test tube storage box 100; the twelve rows of test tube assemblies arranged along the first direction are numbered 1, 2, 3, … 10, 11, 12 respectively, wherein the row of test tube assemblies numbered with even number is the even row test tube assembly 120, and the row of test tube assemblies numbered with odd number is the odd row test tube assembly 110.

[0062] For example, the first direction is the second direction. Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, in some embodiments, the test tube ejection mechanism further comprises a material rack 400 for placing the test tube storage box 100, the test tube storage box 100 is inserted and matched with the base 200 through the material rack 400, and is separated from the base 200, that is, the material rack 400 has a first state of being inserted and matched with the base 200 and a second state, and a third state of being separated from the base 200; the middle part of the material rack 400 is formed with a through slot 410 in the vertical direction, which is used for the test tube ejection needle assembly 300 to pass through and lift the odd row test tube assembly 110 or the even row test tube assembly 120 from the test tube storage box 100. Through the transition connection of the material rack 400, the test tube storage box 100 is inserted and matched with the base 200 in different states without modifying the structure of the existing market test tube storage box 100, so as to lift all the even row test tube assemblies 120 or all the odd row test tube assemblies 110 to produce a height displacement relative to the test tube storage box 100.

[0063] The structure of the material rack 400 and the base 200 of the present embodiment is described in detail below.

[0064] In some embodiments, one of the base 200 and the material rack 400 is provided with a first positioning and inserting assembly and a second positioning and inserting assembly, and the other is provided with a third positioning and inserting assembly, the third positioning and inserting assembly is inserted and matched with the first positioning and inserting assembly when the material rack 400 is in the first state; the third positioning and inserting assembly is inserted and matched with the second positioning and inserting assembly when the material rack 400 is in the second state. In the process of switching the material rack 400 to the first state, the third positioning and inserting assembly and the first positioning and inserting assembly are guided and positioned to be inserted and matched, which ensures that the material rack 400 and the test tube storage box 100 are accurately switched to the first state, so as to ensure that all the odd row test tube assemblies 110 are lifted to produce a height displacement relative to the test tube storage box 100 for clamping and taking out; in the process of switching the material rack 400 to the second state, the third positioning and inserting assembly and the second positioning and inserting assembly are guided and positioned to be inserted and matched, which ensures that the material rack 400 and the test tube storage box 100 are accurately switched to the second state, so as to ensure that all the even row test tube assemblies 120 are lifted to produce a height displacement relative to the test tube storage box 100 for clamping and taking out.

[0065] The structure of the first positioning and inserting assembly, the second positioning and inserting assembly and the third positioning and inserting assembly of the present embodiment and the relative positional relationship therebetween are described below.

[0066] As Figures 1 to 7As shown, in some embodiments, the third positioning and inserting assembly includes two first positioning holes 420 arranged at intervals, which are arranged on the end surface of the rack 400 facing the base 200, and the first positioning and inserting assembly includes a first positioning pin assembly arranged on the base 200, which matches the two first positioning holes 420; the second positioning and inserting assembly includes a second positioning pin assembly arranged on the base 200, which matches the two first positioning holes 420; when it is needed to switch the rack 400 from the third state to the first state, the first positioning pin assembly is aligned with the two first positioning holes 420 in the vertical direction at the same time, and then the two first positioning holes 420 are inserted downward to be clamped with the first positioning pin assembly, so as to ensure that the rack 400 and the test tube storage box 100 are accurately switched to the first state, thereby ensuring that all the odd-row test tube assemblies 110 are lifted to have a height displacement relative to the test tube storage box 100 so as to be clamped and taken out; when it is needed to switch the rack 400 from the third state to the second state, the second positioning pin assembly is aligned with the two first positioning holes 420 in the vertical direction at the same time, and then the two first positioning holes 420 are inserted downward to be clamped with the second positioning pin assembly, so as to ensure that the rack 400 and the test tube storage box 100 are accurately switched to the second state, thereby ensuring that all the even-row test tube assemblies 120 are lifted to have a height displacement relative to the test tube storage box 100 so as to be clamped and taken out.

[0067] Specifically, the two first positioning holes 420 are arranged at intervals in the first direction on the rack 400, the first positioning pin assembly includes two first positioning pins 210 arranged at intervals in the first direction, which match the first positioning holes 420, and the interval of the two first positioning pins 210 is the same as the interval of the two first positioning holes 420; the second positioning pin assembly includes two second positioning pins 220 arranged at intervals in the first direction, which match the first positioning holes 420, and the interval of the two second positioning pins 220 is the same as the interval of the two first positioning holes 420, and the interval of the second positioning pin 220 and the closest first positioning pin 210 in the first direction is the same as the interval of the adjacent odd-row test tube assembly 110 and even-row test tube assembly 120 in the first direction. It can be understood that, in specific applications, the two first positioning holes 420 arranged at intervals in the second direction on the rack 400 can also have the same effect.

[0068] In order to play a foolproof role, as shown, Figure 7 Specifically, the two first positioning pins 210 are arranged at intervals in the second direction.

[0069] Specifically, the first positioning pin 210 and the second positioning pin 220 are detachably connected to the base 200, so that when the first positioning pin 210 or the second positioning pin 220 is damaged, it can be detached for repair or replacement.

[0070] Hereinafter, the detachable connection structure of the first positioning pin 210 and the second positioning pin 220 with the base 200 will be described in detail. In some embodiments, a first screw is arranged on the base 200 corresponding to the position of the first positioning pin 210 and the second positioning pin 220, respectively. A third internal threaded hole is arranged in the end of the first positioning pin 210 and the second positioning pin 220 facing the base 200, respectively, and the third internal threaded hole is matched with the first screw. In another alternative embodiment, a fourth internal threaded hole is arranged on the base 200 corresponding to the position of the first positioning pin 210 and the second positioning pin 220, respectively. A first external thread is arranged on the sidewall of the end of the first positioning pin 210 and the second positioning pin 220 facing the base 200, respectively, and the first external thread is matched with the fourth internal threaded hole.

[0071] In specific applications, the first positioning pin 210 and the second positioning pin 220 can also be detachably connected to the base 200 by means of a buckle connection. The first positioning pin 210 and the second positioning pin 220 can also be interference-fitted or adhesively fixed on the base 200, which is convenient and reliable to install. The first positioning pin 210 and the second positioning pin 220 can also be integrally formed with the base 200, which has higher accuracy in relative positional relationship.

[0072] In other embodiments, the third positioning and inserting assembly includes two second positioning holes arranged at intervals, which are arranged on the end surface of the base 200 facing the rack 400, the first positioning and inserting assembly includes a third positioning pin assembly arranged on the rack 400, which matches the two second positioning holes; the second positioning and inserting assembly includes a fourth positioning pin assembly arranged on the rack 400, which matches the two second positioning holes; when it is needed to switch the rack 400 from the third state to the first state, the third positioning pin assembly is aligned with the two second positioning holes in the vertical direction at the same time, and then the third positioning pin assembly is inserted downward to be clamped with the two second positioning holes, which ensures that the rack 400 and the test tube storage box 100 are accurately switched to the first state, so as to ensure that all the odd-row test tube assemblies 110 are lifted to have a height displacement relative to the test tube storage box 100 for clamping and taking out; when it is needed to switch the rack 400 from the third state to the second state, the fourth positioning pin assembly is aligned with the two second positioning holes in the vertical direction at the same time, and then the fourth positioning pin assembly is inserted downward to be clamped with the two second positioning holes, which ensures that the rack 400 and the test tube storage box 100 are accurately switched to the second state, so as to ensure that all the even-row test tube assemblies 120 are lifted to have a height displacement relative to the test tube storage box 100 for clamping and taking out.

[0073] Specifically, the two second positioning holes are arranged at intervals in the first direction on the base 200, the third positioning pin assembly includes two third positioning pins arranged at intervals in the first direction, which match the second positioning holes, and the interval of the two third positioning pins is the same as the interval of the two second positioning holes; the fourth positioning pin assembly includes two fourth positioning pins arranged at intervals in the first direction, which match the second positioning holes, and the interval of the two fourth positioning pins is the same as the interval of the two second positioning holes, and the interval of the fourth positioning pin and the nearest third positioning pin in the first direction is the same as the interval of the adjacent odd-row test tube assembly 110 and even-row test tube assembly 120 in the first direction. It can be understood that, in specific applications, the two second positioning holes arranged at intervals in the second direction on the base 200 can also have the same effect.

[0074] In order to play a foolproof role, specifically, the two second positioning holes are arranged staggered in the second direction.

[0075] Specifically, the third positioning pin and the fourth positioning pin are detachably connected to the rack 400, so as to be detached for maintenance or replacement when the third positioning pin or the fourth positioning pin is damaged.

[0076] The detachable connection structure of the third positioning pin and the fourth positioning pin with the material rack 400 is described in detail. In some embodiments, a second screw is arranged at a position corresponding to the third positioning pin and the fourth positioning pin on the material rack 400, and a fifth internal threaded hole is arranged in one end of the third positioning pin and the fourth positioning pin towards the base 200, which matches the second screw. In another alternative embodiment, a sixth internal threaded hole is arranged at a position corresponding to the third positioning pin and the fourth positioning pin on the material rack 400, and a second external thread is arranged in the side wall of one end of the third positioning pin and the fourth positioning pin towards the material rack 400, which matches the sixth internal threaded hole.

[0077] In specific applications, the third positioning pin and the fourth positioning pin can also be detachably connected with the material rack 400 through a buckle connection. The third positioning pin and the fourth positioning pin can also be fixed on the material rack 400 through interference fit or adhesion, which is convenient and reliable to install. The third positioning pin and the fourth positioning pin can also be integrally formed with the material rack 400, which has higher accuracy of relative position relationship.

[0078] In addition, in another other embodiment, the third positioning plug-in assembly includes two fifth positioning pins arranged at intervals, which are arranged on the end face of the material rack 400 towards the base 200. The first positioning plug-in assembly includes a third positioning hole assembly arranged on the base 200, which matches the two fifth positioning pins. The second positioning plug-in assembly includes a fourth positioning hole assembly arranged on the base 200, which matches the two fifth positioning pins. When it is needed to switch the material rack 400 from the third state to the first state, the third positioning hole assembly is aligned with the two fifth positioning pins in the vertical direction at the same time, and then the two fifth positioning pins are inserted downwards to be clamped with the third positioning hole assembly, which ensures that the material rack 400 and the test tube storage box 100 are accurately switched to the first state, so as to ensure that all the odd row test tube assemblies 110 are lifted to have a height displacement relative to the test tube storage box 100 for clamping and taking out. When it is needed to switch the material rack 400 from the third state to the second state, the fourth positioning hole assembly is aligned with the two fifth positioning pins in the vertical direction at the same time, and then the two fifth positioning pins are inserted downwards to be clamped with the fifth positioning hole assembly, which ensures that the material rack 400 and the test tube storage box 100 are accurately switched to the second state, so as to ensure that all the even row test tube assemblies 120 are lifted to have a height displacement relative to the test tube storage box 100 for clamping and taking out.

[0079] Specifically, two fifth positioning pins are arranged at intervals along a first direction on the material rack 400, the third positioning hole assembly includes two third positioning holes arranged at intervals along the first direction, the third positioning holes are matched with the fifth positioning pins, and the interval between the two third positioning holes is the same as the interval between the two fifth positioning pins; the fourth positioning hole assembly includes two fourth positioning holes arranged at intervals along the first direction, the fourth positioning holes are matched with the fifth positioning pins, the interval between the two fourth positioning holes is the same as the interval between the two fifth positioning pins, and the interval between the closest fourth positioning hole and the closest third positioning hole along the first direction is the same as the interval between the adjacent odd row tube assembly 110 and the adjacent even row tube assembly 120 along the first direction. It can be understood that, in specific applications, the two fifth positioning pins arranged at intervals along a second direction on the material rack 400 can also have the same effect.

[0080] In order to play the role of preventing mistakes, specifically, the two fifth positioning pins are arranged at intervals along a second direction.

[0081] Specifically, the fifth positioning pin is detachably connected to the material rack 400, so that when the fifth positioning pin is damaged, it can be detached for maintenance or replacement.

[0082] Here, the detachable connection structure of the fifth positioning pin and the material rack 400 is described in detail. In some embodiments, a third screw is arranged on the material rack 400 corresponding to the position of the fifth positioning pin, and a seventh internal threaded hole is arranged in the end of the fifth positioning pin facing the material rack 400, which is matched with the third screw. In another alternative embodiment, an eighth internal threaded hole is arranged on the material rack 400 corresponding to the position of the fifth positioning pin, and a third external thread is arranged on the side wall of the end of the fifth positioning pin facing the material rack 400, which is matched with the eighth internal threaded hole.

[0083] In specific applications, the fifth positioning pin can also be detachably connected to the material rack 400 through a buckle connection; the fifth positioning pin can also be interference fit or adhesively fixed on the material rack 400, which is convenient and reliable to install; the fifth positioning pin can also be integrally formed with the material rack 400, which has higher accuracy of relative positional relationship.

[0084] In addition, as Figures 10 to 13As shown, in yet other embodiments, the third positioning and inserting assembly includes two spaced-apart sixth positioning pins 230 arranged on the end face of the base 200 facing the rack 400, the first positioning and inserting assembly includes a fifth positioning hole assembly arranged on the rack 400, the fifth positioning hole assembly is matched with the two sixth positioning pins 230, the second positioning and inserting assembly includes a sixth positioning hole assembly arranged on the rack 400, the sixth positioning hole assembly is matched with the two sixth positioning pins 230; when it is needed to switch the rack 400 from the third state to the first state, the fifth positioning hole assembly is aligned with the two sixth positioning pins 230 in the vertical direction at the same time, and then the fifth positioning hole assembly is inserted downward to be clamped with the two sixth positioning pins 230, so as to ensure that the rack 400 and the test tube storage box 100 are accurately switched to the first state, thereby ensuring that all the odd-row test tube assemblies 110 are lifted to have a height displacement relative to the test tube storage box 100 so as to be clamped and taken out; when it is needed to switch the rack 400 from the third state to the second state, the sixth positioning hole assembly is aligned with the two sixth positioning pins 230 in the vertical direction at the same time, and then the sixth positioning hole assembly is inserted downward to be clamped with the two sixth positioning pins 230, so as to ensure that the rack 400 and the test tube storage box 100 are accurately switched to the second state, thereby ensuring that all the even-row test tube assemblies 120 are lifted to have a height displacement relative to the test tube storage box 100 so as to be clamped and taken out.

[0085] Specifically, the two sixth positioning pins 230 are arranged in the first direction on the base 200, the fifth positioning hole assembly includes two fifth positioning holes 430 arranged in the first direction at intervals, the fifth positioning holes 430 are matched with the sixth positioning pins 230, and the interval between the two fifth positioning holes 430 is the same as the interval between the two sixth positioning pins 230; the sixth positioning hole assembly includes two sixth positioning holes 440 arranged in the first direction at intervals, the sixth positioning holes 440 are matched with the sixth positioning pins 230, and the interval between the two sixth positioning holes 440 is the same as the interval between the two sixth positioning pins 230, and the interval between the sixth positioning hole 440 closest to the fifth positioning hole 430 in the first direction and the adjacent odd-row test tube assembly 110 and even-row test tube assembly 120 in the first direction is the same. It can be understood that, in specific applications, the two sixth positioning pins 230 arranged in the second direction on the base 200 can also have the same effect.

[0086] In order to play a foolproof role, as shown, Figure 13 Specifically, the two sixth positioning pins 230 are arranged in the second direction at intervals.

[0087] Specifically, the sixth positioning pin 230 is detachably connected to the base 200, so as to be disassembled for maintenance or replacement when the sixth positioning pin 230 is damaged.

[0088] Hereinafter, the detachable connection structure of the sixth positioning pin 230 and the base 200 will be described in detail. In some embodiments, a fourth screw is arranged on the base 200 at a position corresponding to the sixth positioning pin 230, and a ninth internal threaded hole is arranged in an end of the sixth positioning pin 230 facing the base 200, which is matched with the fourth screw. In another alternative embodiment, a tenth internal threaded hole is arranged on the base 200 at a position corresponding to the sixth positioning pin 230, and a fourth external thread is arranged on a sidewall of an end of the sixth positioning pin 230 facing the base 200, which is matched with the tenth internal threaded hole.

[0089] In specific applications, the sixth positioning pin 230 can also be detachably connected to the base 200 through a buckle connection. The sixth positioning pin 230 can also be fixed on the base 200 through interference fit or adhesion, which is convenient and reliable to install. The sixth positioning pin 230 can also be integrally formed with the base 200, which has higher accuracy of relative positional relationship.

[0090] As shown in Figure 1 、 Figure 3 、 Figure 6 、 Figure 10 、 Figure 11 and Figure 13 , in some embodiments, the base 200 is provided with first limiting assemblies 240 arranged at intervals along the second direction, and the two first limiting assemblies 240 are used to abut against two side surfaces of the material rack 400 along the second direction. During the process of inserting and connecting the material rack 400 and the base 200, the two first limiting assemblies 240 play a guiding role, which ensures that the material rack 400 is smoothly inserted and connected to the base 200.

[0091] Considering that the size of the test tube storage box 100 and the material rack 400 along the first direction is relatively large in actual use, in order to better guide the action of inserting and connecting the material rack 400 and the base 200, as shown in Figure 1 、 Figure 3 and Figure 6 , specifically, each first limiting assembly 240 includes two first limiting members 241 arranged at intervals along the first direction. In order to facilitate the assembly and maintenance and replacement of the first limiting members 241, more specifically, the first limiting members 241 are connected to the base 200 through bolts.

[0092] The specific structure of the ejector pin assembly 300 and the connection mode of the ejector pin assembly 300 and the base 200 will be described in detail.

[0093] As shown in Figure 2 and Figure 6 In some embodiments, as each row of test tube assembly includes eight test tubes arranged in sequence and spaced apart along the second direction, in order to ensure that each row of ejector pin assembly 300 can eject eight test tubes of each row of test tube assembly from the test tube storage box 100 at a time, preferably, each row of said ejector pin assembly 300 includes eight ejector pins 310 arranged in sequence and spaced apart along the second direction, the spacing between two adjacent ejector pins 310 along the second direction is the same as the spacing between two adjacent test tubes along the second direction; in order to facilitate disassembly for repair or replacement when the ejector pin 310 is damaged, specifically, said ejector pin 310 is detachably connected to said base 200.

[0094] Hereinafter, the detachable connection structure of the ejector pin 310 and the base 200 will be described in detail. In some embodiments, a threaded rod 250 is arranged on the base 200 corresponding to the position of the ejector pin 310, and a first internal threaded hole is arranged in the end of the ejector pin 310 facing the base 200, which matches the threaded rod 250; because the ejector pin 310 is connected to the base 200 by threaded assembly, the bolt is a standard part, so as shown in Figure 8 , the ejector pin 310 can be changed from a φ4*45*M3 cylindrical pin standard part, thereby reducing the cost of separately machining the ejector pin 310. In another alternative embodiment, a second internal threaded hole is arranged on the base 200 corresponding to the position of the ejector pin 310, and an external threaded part is arranged on the side wall of the end of the ejector pin 310 facing the base 200, which matches the second internal threaded hole.

[0095] In specific applications, the ejector pin 310 can also be detachably connected to the base 200 by a buckle connection; the ejector pin 310 can also be fixed on the base 200 by interference fit or adhesion, which is convenient and reliable to install; the ejector pin 310 can also be integrally formed with the base 200, which has higher accuracy of relative positional relationship.

[0096] As shown in Figure 2 , in some embodiments, the end of the ejector pin 310 facing the base 200 is arranged as a first part 311, and the other end is arranged as a second part 312, the outer diameter of the second part 312 is smaller than that of the first part 311; the second part 312 with smaller outer diameter facilitates the extension into the containing grid and abutting against the bottom of the cryopreserved tube to eject the test tube, and the first part 311 with larger outer diameter is used to enhance the overall strength of the ejector pin 310 and reduce deformation.

[0097] As shown in Figure 1 , Figure 3 , Figure 4 and Figure 5As shown in the drawings, in some embodiments, the material rack 400 is provided with first limiting blocks 450 which are spaced apart relative to each other along the first direction, and two first limiting blocks 450 are used to abut against two side surfaces of the test tube storage box 100 along the first direction. After the test tube storage box 100 is placed on the material rack 400, the two side surfaces of the test tube storage box 100 along the first direction are clamped by the two first limiting blocks 450, which effectively avoids displacement of the test tube storage box 100 relative to the material rack 400 during the process of inserting and fitting the material rack 400 with the base 200, thereby ensuring the effect of the ejector pin assembly 300 lifting the even-row test tube assembly 120 or the odd-row test tube assembly 110 from the test tube storage box 100.

[0098] As shown in the drawings, in particular, the two first limiting blocks 450 are respectively provided with first inclined surfaces 451 at the ends thereof which face each other, the first inclined surfaces 451 extend from the outside of the material rack 400 to the center of the material rack 400 along the first direction, and are arranged to be inclined downwardly; the first inclined surfaces 451 make the region between the two first limiting blocks 450 along the first direction form an opening upwardly trumpet-shaped, so as to place the test tube storage box 100 on the upper end surface of the material rack 400 and in the region between the two first limiting blocks 450 along the first direction. Figure 5 As shown in the drawings, in particular, the two first limiting blocks 450 are respectively provided with first inclined surfaces 451 at the ends thereof which face each other, the first inclined surfaces 451 extend from the outside of the material rack 400 to the center of the material rack 400 along the first direction, and are arranged to be inclined downwardly; the first inclined surfaces 451 make the region between the two first limiting blocks 450 along the first direction form an opening upwardly trumpet-shaped, so as to place the test tube storage box 100 on the upper end surface of the material rack 400 and in the region between the two first limiting blocks 450 along the first direction.

[0099] Figures 3 to 5 As shown in the drawings, in particular, the two first limiting blocks 450 are respectively provided with first inclined surfaces 451 at the ends thereof which face each other, the first inclined surfaces 451 extend from the outside of the material rack 400 to the center of the material rack 400 along the first direction, and are arranged to be inclined downwardly; the first inclined surfaces 451 make the region between the two first limiting blocks 450 along the first direction form an opening upwardly trumpet-shaped, so as to place the test tube storage box 100 on the upper end surface of the material rack 400 and in the region between the two first limiting blocks 450 along the first direction.

[0100] In view of the fact that the size of the test tube storage box 100 along the first direction is greater than the size thereof along the second direction in actual use, in order to ensure the clamping effect of the test tube storage box 100 after being placed on the upper end surface of the material rack 400, in particular, each second limiting assembly 460 comprises two second limiting blocks 461 which are spaced apart relative to each other along the first direction. In order to facilitate assembly and maintenance and replacement of the second limiting blocks 461, more particularly, the second limiting blocks 461 are connected to the material rack 400 by bolts.

[0101] As shown in the drawings, in particular, the two first limiting blocks 450 are respectively provided with first inclined surfaces 451 at the ends thereof which face each other, the first inclined surfaces 451 extend from the outside of the material rack 400 to the center of the material rack 400 along the first direction, and are arranged to be inclined downwardly; the first inclined surfaces 451 make the region between the two first limiting blocks 450 along the first direction form an opening upwardly trumpet-shaped, so as to place the test tube storage box 100 on the upper end surface of the material rack 400 and in the region between the two first limiting blocks 450 along the first direction. Figure 5 ​As shown, specifically, one end of each of the two second limiting assemblies 460 facing each other is provided with a second inclined surface 462, the second inclined surface 462 extends from the outer side of the material rack 400 to the center of the material rack 400 along the second direction and is arranged inclined downwardly; the second inclined surface 462 forms an opening upward horn between the two second limiting assemblies 460 along the second direction, so as to place the test tube storage box 100 on the upper end surface of the material rack 400 and in the area between the two second limiting assemblies 460 along the second direction.

[0102] As shown in some embodiments, the end of the material rack 400 away from the base 200 is spaced apart to provide two hand-held pieces 470, the surface of the hand-held piece 470 is provided with a hollow part 471, which facilitates the operator to put his hand into it to control the material rack 400 with the test tube storage box 100 placed therein to lift along the vertical direction, so as to switch between the first state and the third state or switch between the second state and the third state. Figure 5

[0103] In a specific application, the test tube can be a cryogenic tube or a cold storage tube, etc., and here the cryogenic tube is taken as the test tube, the first positioning plug-in assembly includes two first positioning pins 210 spaced apart along the first direction, the second positioning plug-in assembly includes two second positioning pins 220 spaced apart along the first direction, and the third positioning plug-in assembly includes two first positioning holes 420 spaced apart, and the use process of the embodiment is described, and correspondingly, the test tube storage box 100 is a cryogenic tube storage box, the cryogenic tube storage box is spaced apart along the first direction to provide twelve rows of accommodating grid assemblies, each row of accommodating grid assemblies includes eight accommodating grids spaced apart along the second direction, and ninety-six cryogenic tubes are embedded in the accommodating grids one by one and supported by the accommodating grids, so that every eight cryogenic tubes spaced apart along the second direction form a row of cryogenic tube assemblies, that is, the ninety-six cryogenic tubes are sequentially and spaced apart along the first direction in the cryogenic tube storage box as twelve rows of cryogenic tube assemblies; the twelve rows of cryogenic tube assemblies arranged along the first direction are numbered as 1, 2, 3... 10, 11, and 12, wherein the row of cryogenic tube assemblies numbered as even numbers is an even row of cryogenic tube assemblies, and the row of cryogenic tube assemblies numbered as odd numbers is an odd row of cryogenic tube assemblies; the specific use process is as follows:

[0104] First, the cryogenic tube storage box is installed on the material rack 400, and the two first limiting blocks 450 and the two second limiting assemblies 460 respectively abut and clamp the side walls of the cryogenic tube storage box;

[0105] When it is needed to lift and clamp the odd row of cryogenic tube assemblies from the cryogenic tube storage box, as shown in Figure 2 and Figure 5 ​As shown, the two first positioning pins 210 are respectively aligned with the two first positioning holes 420 in the vertical direction and plugged into each other until the bottom end surface of the material rack 400 abuts against the top end surface of the base 200, so that the material rack 400 and the cryotube storage box are accurately switched to the first state, and all the odd-numbered rows of cryotube assemblies are lifted up to generate a height displacement relative to the cryotube storage box for clamping and removal, and then taken out manually or by grippers to perform operations such as scanning the code, opening the cover, adding liquid, and capping the tubes;

[0106] When it is necessary to lift and remove the even-numbered rows of cryotube assemblies from the cryotube storage box, Figure 3 and Figure 5 As shown, the two second positioning pins 220 are aligned and plugged into the two first positioning holes 420 in the vertical direction until the bottom end surface of the material rack 400 abuts against the top end surface of the base 200, so that the material rack 400 and the freezing tube storage box are accurately switched to the first state, and all the even-numbered rows of freezing tube assemblies are lifted up to produce a height displacement relative to the freezing tube storage box for clamping and removal, and then taken out manually or by grippers to perform actions such as scanning the code, opening the lid, adding liquid and capping the tubes.

[0107] In another specific application, the use process of the embodiment is described with a cryotube as a test tube, the first positioning plug-in assembly includes two fifth positioning holes 430 spaced apart along the first direction, the second positioning plug-in assembly includes two sixth positioning holes 440 spaced apart along the first direction, and the third positioning plug-in assembly includes two sixth positioning pins 230 spaced apart. The specific use process is as follows:

[0108] First, install the cryotube storage box on the material rack 400, and the two first limiting blocks 450 and the two second limiting assemblies 460 respectively abut and clamp the side walls of the cryotube storage box;

[0109] When odd-numbered rows of cryotube assemblies need to be lifted and taken out from the cryotube storage box, Figure 10 、 Figure 12 and Figure 13 As shown, the two fifth positioning holes 430 are respectively aligned with the two sixth positioning pins 230 in the vertical direction and plugged into each other until the bottom end surface of the material rack 400 abuts against the top end surface of the base 200, so that the material rack 400 and the cryotube storage box are accurately switched to the first state, and all the odd-numbered rows of cryotube assemblies are lifted up to generate a height displacement relative to the cryotube storage box for clamping and removal, and then taken out manually or by grippers to perform operations such as scanning the code, opening the cover, adding liquid, and capping the tubes;

[0110] When it is necessary to lift and remove the even-numbered rows of cryotube assemblies from the cryotube storage box, Figures 11 to 13As shown, two sixth positioning holes 440 and two sixth positioning pins 230 are aligned and inserted in the vertical direction until the bottom end surface of the material rack 400 abuts against the top end surface of the base 200, so that the material rack 400 and the frozen tube storage box are accurately switched to the first state, and all even-row frozen tube assemblies are lifted to generate a height displacement relative to the frozen tube storage box so as to be clamped and taken out, and then taken out by artificial or gripper to perform actions such as code scanning, cover opening, liquid adding and tube cover.

[0111] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.

Claims

1. A test tube ejection mechanism for ejecting a test tube from a bottom-holed test tube storage box (100), characterized by, The ejection mechanism of the test tube comprises: a base (200) provided with an ejection structure; The test tube storage box (100) has a first state and a second state of being inserted with the base (200); when the test tube storage box (100) is in the first state, the ejection structure cooperates with the odd row test tube assembly (110) and lifts the odd row test tube assembly (110) from the test tube storage box (100); when the test tube storage box (100) is in the second state, the ejection structure cooperates with the even row test tube assembly (120) and lifts the even row test tube assembly (120) from the test tube storage box (100).

2. A test tube ejector mechanism according to claim 1, wherein The ejection structure comprises a plurality of rows of ejection needle assemblies (300) arranged at intervals in a first direction, the number of the ejection needle assemblies (300) is at least half of the sum of the number of the odd row test tube assembly (110) and the even row test tube assembly (120), and the spacing between two adjacent rows of the ejection needle assemblies (300) is the same as the spacing between two adjacent rows of the even row test tube assembly (120).

3. A test tube ejector mechanism according to claim 1 or 2, wherein Further comprising a material rack (400) for placing the test tube storage box (100), the test tube storage box (100) is inserted with the base (200) through the material rack (400) and separated from the base (200); a through slot (410) is formed in the vertical direction in the middle of the material rack (400), the through slot (410) is used for the ejection structure to pass through and lift the odd row test tube assembly (110) or the even row test tube assembly (120) from the test tube storage box (100); the first direction and the vertical direction are perpendicular to each other.

4. A test tube ejector mechanism according to claim 3, wherein One of the base (200) and the material rack (400) is provided with a first positioning plug-in assembly and a second positioning plug-in assembly, and the other is provided with a third positioning plug-in assembly; when the material rack (400) is in the first state, the third positioning plug-in assembly is inserted with the first positioning plug-in assembly; when the material rack (400) is in the second state, the third positioning plug-in assembly is inserted with the second positioning plug-in assembly.

5. A test tube ejector mechanism according to claim 4, wherein The third positioning plug-in assembly comprises two spaced first positioning holes (420) arranged on the end face of the material rack (400) facing the base (200), and a first positioning pin assembly arranged on the base (200) and matched with the two first positioning holes (420); the second positioning plug-in assembly comprises a second positioning pin assembly arranged on the base (200) and matched with the two first positioning holes (420); Or, the third positioning plug-in assembly includes two second positioning holes arranged at intervals, the second positioning holes are arranged on an end face of the base (200) facing the material rack (400), the first positioning plug-in assembly includes a third positioning pin assembly arranged on the material rack (400), and the third positioning pin assembly is matched with the two second positioning holes; the second positioning plug-in assembly includes a fourth positioning pin assembly arranged on the material rack (400), and the fourth positioning pin assembly is matched with the two second positioning holes. Or, the third positioning plug-in assembly includes two fifth positioning pins arranged at intervals, the fifth positioning pins are arranged on an end face of the material rack (400) facing the base (200), the first positioning plug-in assembly includes a third positioning hole assembly arranged on the base (200), the third positioning hole assembly is matched with the two fifth positioning pins, and the second positioning plug-in assembly includes a fourth positioning hole assembly arranged on the base (200), and the fourth positioning hole assembly is matched with the two fifth positioning pins. Or, the third positioning plug-in assembly includes two sixth positioning pins (230) arranged at intervals, the sixth positioning pins (230) are arranged on an end face of the base (200) facing the material rack (400), the first positioning plug-in assembly includes a fifth positioning hole assembly arranged on the material rack (400), the fifth positioning hole assembly is matched with the two sixth positioning pins (230), and the second positioning plug-in assembly includes a sixth positioning hole assembly arranged on the material rack (400), and the sixth positioning hole assembly is matched with the two sixth positioning pins (230).

6. A test tube ejector mechanism according to claim 3, wherein The base (200) is provided with first limiting assemblies (240) arranged at intervals along a second direction, and the two first limiting assemblies (240) are used for abutting against two side faces of the material rack (400) along the second direction, and the first direction and the second direction are perpendicular to each other.

7. A test tube ejector mechanism according to claim 5, wherein The first positioning pin assembly and / or the second positioning pin assembly are detachably connected to the base (200).

8. A test tube ejector mechanism according to claim 5, wherein The third positioning pin assembly and / or the fourth positioning pin assembly are detachably connected to the material rack (400).

9. A test tube ejector mechanism according to claim 5, wherein The fifth positioning pin is detachably connected to the material rack (400).

10. The test tube ejector mechanism of claim 5, wherein, The sixth positioning pin (230) is detachably connected to the base (200).

11. A test tube ejector mechanism according to claim 2, wherein Each row of the ejector pin assemblies (300) includes a plurality of ejector pins (310) arranged at intervals along a second direction, and the first direction and the second direction are perpendicular to each other; and the ejector pins (310) are detachably connected to the base (200).

12. A test tube ejector mechanism according to claim 11, wherein The base (200) is provided with a screw rod (250) corresponding to the position of the ejector pin (310), one end of the ejector pin (310) facing the base (200) is provided with a first internal threaded hole, and the first internal threaded hole is matched with the screw rod (250); Or, a second internal threaded hole is arranged on the base (200) corresponding to the position of the ejector pin (310), and an external threaded part is arranged on the side wall of one end of the ejector pin (310) facing the base (200), which matches the second internal threaded hole.

13. A test tube ejector mechanism according to claim 11, wherein One end of the ejector pin (310) is arranged as a first part (311), and the other end is arranged as a second part (312), and the outer diameter of the second part (312) is smaller than that of the first part (311).

14. A test tube ejector mechanism according to claim 3, wherein The material rack (400) is provided with first limiting blocks (450) relative to each other along a first direction, and the two first limiting blocks (450) are used to abut the two side surfaces of the test tube storage box (100) along the first direction. And / or, the material rack (400) is provided with second limiting assemblies (460) relative to each other along a second direction, and the two second limiting assemblies (460) are used to abut the two side surfaces of the test tube storage box (100) along the second direction. And / or, two hand-held parts (470) are arranged on one end of the material rack (400) away from the base (200), and the surface of the hand-held part (470) is provided with a hollow part (471).

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