A cryopreservation tube ejector pin

Abstract

This utility model relates to the field of ejector pin technology, specifically to an ejector pin for retrieving cryopreservation tubes. It includes a three-dimensional moving frame for movement in three-dimensional space, on which parallel supports and side plates are mounted. It also includes an L-shaped lifting frame, vertically raised and lowered on the side plates via a power source; and an ejector pin assembly, mounted at the front end of the L-shaped lifting frame, comprising two semi-cylindrical sleeves with internal lifting chambers. A spring and a lifting column are inserted into the lifting chambers from bottom to top. This ejector pin for retrieving cryopreservation tubes features an ejector pin assembly that facilitates disassembly and assembly, allowing for easy maintenance and replacement of parts, thus reducing operating costs. The spring and lifting column provide deformation distance for the ejector pin body to eject the cryopreservation tube, ensuring reliable separation of the cryopreservation tube from the cryopreservation box. Furthermore, it helps to avoid the probability of damaging the cryopreservation tube or the ejector pin body by forceful lifting when the cryopreservation tube is severely adhered to the surface. The overall structure is reliable and practical.

Description

Technical Field

[0001] This utility model relates to the field of ejector pin technology, specifically to an ejector pin for retrieving cryopreservation tubes. Background Technology

[0002] In the field of biological sample storage, cryovials, as the core carrier for sample preservation, are often stored in layers in a single automated refrigerator along with cryovial boxes to achieve orderly management and automated storage and retrieval of samples.

[0003] Currently, most automated refrigerators use a three-dimensional moving platform to achieve spatial positioning and use mechanical grippers to complete the freezing tube retrieval operation. However, in the low-temperature storage environment of -80°C, the freezing tubes are prone to sticking to the freezing box, which can expose significant defects.

[0004] In low-temperature environments, the outer wall of the cryopreservation tube and the inner wall of the cryopreservation box slot are prone to cold adhesion due to the freezing of condensed water in the air. This adhesion can easily cause the cryopreservation tube to get stuck during the retrieval process, or even prevent the cryopreservation tube from being smoothly removed from the cryopreservation box slot due to excessive adhesion resistance, thus interrupting the retrieval process. The existing tube retrieval method suffers from low efficiency due to cold adhesion, which cannot meet the stable operation requirements of automated refrigerators.

[0005] In summary, we consider designing a bottom-up lifting structure, combined with an existing three-dimensional moving platform and mechanical grippers, to achieve reliable separation of cryopreservation tubes from cryopreservation boxes; therefore, we propose a cryopreservation tube retrieval pin. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings mentioned in the background art and provide a cryopreservation tube extraction pin.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A cryopreservation tube ejector pin includes a three-dimensional moving frame for moving in three-dimensional space, wherein parallel supports and side plates are mounted on the three-dimensional moving frame, and further includes: The L-shaped lifting frame is installed on the side plate by being raised and lowered vertically via a power source; The ejector assembly is installed at the front end of the L-shaped lifting frame and includes two semi-cylindrical sleeves with lifting chambers inside. A spring and a lifting column are inserted into the lifting chamber from bottom to top. The top of the lifting column is provided with an ejector body for ejecting the cryopreservation tube upward.

[0008] Preferably, the two semi-cylindrical sleeves are respectively connected to lugs for installing screws on their corresponding surfaces, and the two semi-cylindrical sleeves are provided with a limiting cavity that is connected to the lifting cavity. A mounting plate is fixedly connected to the bottom of any of the semi-cylindrical sleeves, and the mounting plate is used for detachable installation at the front end of the L-shaped lifting frame.

[0009] Preferably, the bottom end of the lifting column is provided with a rod for insertion into the lifting cavity, and the rod body is provided with external threads.

[0010] Preferably, a collar block is threaded onto the insertion rod, the collar block being used to slide along the limiting cavity and prevent the lifting column from derailing.

[0011] Preferably, the top end of the ejector pin body is provided with a rubber rib for reducing the local pressure when ejecting the cryopreservation tube.

[0012] Preferably, the top of the lifting column is provided with a threaded hole for detachably installing the ejector pin body.

[0013] Preferably, a slide rail is vertically mounted on the side plate, and the L-shaped lifting frame is slidably mounted on the slide rail via a slider; The bracket is equipped with a drive motor as a power source, and the output shaft of the drive motor is equipped with a gear. A rack plate that meshes with the gear is fixedly installed on the L-shaped lifting frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The cryopreservation tube ejector pin features an ejector assembly that facilitates disassembly and assembly, enabling maintenance and replacement of parts and reducing operating costs. Simultaneously, the spring and lifting column provide deformation distance for the ejector pin body during the ejection of the cryopreservation tube, ensuring reliable separation of the cryopreservation tube from the cryopreservation box. Furthermore, it helps to reduce the probability of damaging the cryopreservation tube or ejector pin body by forceful ejection when the cryopreservation tube is severely adhered to the surface. The overall structure is reliable and practical. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure and installation relationship of this utility model; Figure 3 This is a schematic diagram of the ejector pin assembly of this utility model; Figure 4 This is an exploded view of the installation relationship of the ejector pin assembly of this utility model; Figure 5 This is a cross-sectional view of the ejector pin assembly of this utility model.

[0016] The meanings of the labels in the diagram are as follows: 1. Three-dimensional moving frame; 2. Support; 3. Side plate; 4. Slide rail; 5. Slider; 6. L-shaped lifting frame; 7. Rack plate; 8. Ejector pin assembly; 81. Mounting plate; 82. Semi-cylindrical sleeve; 821. Lifting cavity; 822. Limiting cavity; 83. Lug; 84. Lifting column; 841. Insert rod; 85. Ejector pin body; 851. Rubber rib; 86. Collar block; 87. Spring; 9. Drive motor; 10. Gear. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figures 1-5 The present invention will describe the above technical solution in detail through the following embodiments: The cryopreservation tube retrieval pin in this embodiment includes a three-dimensional moving frame 1 for moving in three-dimensional space. The three-dimensional moving frame 1 is an existing mechanical moving component, and its main purpose is to drive the whole to move in space so as to adjust to different three-dimensional positions and align the cryopreservation tube for subsequent tube retrieval operations.

[0019] Specifically, such as Figure 1 and Figure 2 The structure shown has a bracket 2 and a side plate 3 installed parallel to each other at one end of the three-dimensional moving frame 1. In this embodiment, a slide rail 4 is vertically installed on the side plate 3, and an L-shaped lifting frame 6 is slidably installed on the slide rail 4 along the vertical direction via a slider 5. A drive motor 9 is installed on the bracket 2 as a power source, and a gear 10 is coaxially installed on the output shaft of the drive motor 9. A rack plate 7 for meshing with the gear 10 is fixedly installed on the L-shaped lifting frame 6 on the side corresponding to the gear 10. That is, the drive motor 9 can drive the gear 10 to rotate, and the vertical lifting action of the L-shaped lifting frame 6 is realized by meshing with the rack plate 7, thereby satisfying the action of lifting the cryopreservation tube from bottom to top for sampling.

[0020] like Figures 3-5As shown in the structure, the ejector pin assembly 8 in this embodiment includes two symmetrically arranged semi-cylindrical sleeves 82. The interior of the semi-cylindrical sleeves 82 is provided with a lifting cavity 821 and a limiting cavity 822 connected from top to bottom. In order to facilitate disassembly and assembly, the two semi-cylindrical sleeves 82 are respectively equipped with lugs 83 for threaded mounting screws. The bottom of one semi-cylindrical sleeve 82 is fixedly connected to a mounting plate 81 so that it can be detachably installed at the front end of the L-shaped lifting frame 6, which facilitates the replacement of the entire ejector pin assembly 8.

[0021] To avoid the problem of cold adhesion causing the cryopreservation tube to stick together and become impossible to peel off, which could damage the cryopreservation tube and contaminate the sample when the ejector pin is raised too high, a lifting column 84 is vertically inserted into the lifting chamber 821 via an insert rod 841. A spring 87 is installed between the insert rod 841 and the bottom of the lifting chamber 821. The spring 87 is used to provide downward displacement space to avoid damage from a hard lift.

[0022] Meanwhile, in order to facilitate the replacement of parts and to prevent the lifting column 84 from derailing, the rod body of the insertion rod 841 is provided with an external thread for threaded installation of the collar block 86. The collar block 86 is used to slide along the limiting cavity 822, and the limiting is completed by disassembling and assembling the two semi-cylindrical sleeves 82.

[0023] In other embodiments, the ejector pin is prone to wear or bending deformation due to low-probability faults such as deformation of the cryogenic rack. If the entire ejector pin assembly 8 is replaced, the cost is high. Therefore, in this embodiment, a threaded hole for threaded installation of the ejector pin body 85 is provided at the top of the lifting column 84, and a rubber rib strip 851 is provided at the top of the ejector pin body 85 to improve and reduce the pressure on the local contact surface.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A cryopreservation tube retrieval pin, comprising a three-dimensional moving frame (1) for moving in three-dimensional space, wherein a parallel bracket (2) and a side plate (3) are mounted on the three-dimensional moving frame (1), characterized in that: Also includes: The L-shaped lifting frame (6) is installed on the side plate (3) by lifting and lowering in the vertical direction via a power source; The ejector assembly (8) is installed at the front end of the L-shaped lifting frame (6) and includes two semi-cylindrical sleeves (82) with a lifting cavity (821) inside. A spring (87) and a lifting column (84) are inserted into the lifting cavity (821) from bottom to top. The top of the lifting column (84) is provided with an ejector body (85) for pushing the cryopreservation tube upward.

2. The cryopreservation tube retrieval pin as described in claim 1, characterized in that: The two semi-cylindrical sleeves (82) are respectively connected to lugs (83) for installing screws on their corresponding surfaces, and the two semi-cylindrical sleeves (82) are provided with a limiting cavity (822) that is connected to the lifting cavity (821). A mounting plate (81) is fixedly connected to the bottom of any of the semi-cylindrical sleeves (82), and the mounting plate (81) is used to be detachably installed at the front end of the L-shaped lifting frame (6).

3. The cryopreservation tube retrieval pin as described in claim 2, characterized in that: The bottom end of the lifting column (84) is provided with a plug rod (841) for insertion into the lifting cavity (821), and the plug rod (841) has an external thread.

4. The cryopreservation tube retrieval pin as described in claim 3, characterized in that: A collar block (86) is threaded onto the insert rod (841). The collar block (86) is used to slide along the limiting cavity (822) and prevent the lifting column (84) from derailing.

5. The cryopreservation tube retrieval pin as described in claim 1, characterized in that: The top of the ejector body (85) is provided with a rubber rib (851) for reducing the local pressure of ejecting the cryopreservation tube.

6. The cryopreservation tube retrieval pin as described in claim 5, characterized in that: The top of the lifting column (84) is provided with a threaded hole for detachably installing the ejector body (85).

7. The cryopreservation tube retrieval pin as described in claim 1, characterized in that: A slide rail (4) is vertically installed on the side plate (3), and the L-shaped lifting frame (6) is slidably installed on the slide rail (4) via a slider (5); The bracket (2) is equipped with a drive motor (9) as a power source, and the output shaft of the drive motor (9) is equipped with a gear (10). The L-shaped lifting frame (6) is fixedly installed with a rack plate (7) that meshes with the gear (10).

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