A test tube rack

Abstract

The application discloses a test tube rack, which comprises two side plates, a supporting plate and a jack seat. The supporting plate is horizontally arranged between the two side plates in a lifting manner. The jack seat is a hollow seat body. At least one jack seat is arranged between the two side plates in a rotating manner. At least two groups of test tube jacks with different specifications are arranged on the jack seat. Each group of test tube jacks comprises at least one pair of test tube jacks oppositely arranged on the side wall of the jack seat. The center lines of the test tube jacks in the same group are located on a plane parallel to the rotating axis of the jack seat, and the center lines of the test tube jacks in different groups are located on different planes. The supporting plate and the jack seat are locked by a locking mechanism. The test tube rack has the advantages that one test tube is inserted into a pair of test tube jacks on the jack seat, so that the test tube is limited in two positions and has good stability. The height of the supporting plate can be adjusted, and the jack seat can be rotated to select test tube jacks with different specifications, so that the test tube rack is suitable for different test tubes and has the advantages of simple structure and convenient use.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a test tube holder. Background Technology

[0002] Medical test tubes are disposable sterile containers used in hospitals for collecting, storing, and processing samples such as blood, urine, and tissues. Clinical testing, medical research, and assisted reproductive technologies all require a large number of test tubes. Medical test tubes come in various sizes, commonly classified by diameter as 12mm, 13mm, 15mm, and 16mm, and by length as 75mm, 100mm, and 120mm. Currently, the insertion holes and overall height of commonly used test tube racks are fixed. One type of rack can often only hold one type of test tube, resulting in poor flexibility. Different racks are needed for different sizes of test tubes, leading to the need to prepare racks of various sizes in advance for different locations, wasting space and resources. Furthermore, the frequent need for medical staff to retrieve and change racks of different sizes is inconvenient.

[0003] In response to this situation, some existing technologies have proposed relevant solutions. For example, an invention patent application with publication number CN108114765A discloses a medical test tube placement device. This device has multiple mounting holes 1 on two sides 2 of a U-shaped base, and mounting holes 2 on two sides of a U-shaped bracket 7. Bolts 4 pass through the mounting holes 1 and 2 to mount the bracket 7 onto the base. When the U-shaped opening of the bracket 7 faces upward, it is used to place short test tubes; when the U-shaped opening faces downward, it is used to place long test tubes. The size of the insertion hole 6 on the same bracket 7 is fixed, making it suitable only for long or short test tubes of the same diameter. For test tubes of different diameters, different brackets 7 need to be used, requiring the preparation of multiple brackets with different insertion hole sizes for replacement. Furthermore, the size of the insertion hole 5 on the base is also fixed, further limiting its applicability and resulting in numerous inconveniences and limitations in its use.

[0004] For example, a utility model with announcement number CN211660061U discloses a test tube rack assembly for vaccine experiments that can be resized. The upper surface of the placement plate 1 is provided with evenly arranged diamond-shaped test tube placement holes 11, and the lower surface of the placement plate 1 is provided with an adjustable plate 2 that can move back and forth. The adjustable plate 2 is provided with an adjusting rod 22 that cooperates with the test tube placement holes 11 for adjustment. Both the left and right ends of the placement plate 1 are provided with adjustable blocks 4 that can be raised and lowered. The lower end of the adjusting block 4 is fixed to the base plate 3. The size of the test tube placement holes 11 can be adjusted by moving the adjusting rod 22 on the adjustment plate 2 back and forth, which can meet the placement of test tubes of various diameters. The height of the placement plate 1 can be adjusted by the adjusting block 4, which can meet the placement of test tubes of different lengths. Although this test tube rack assembly is highly flexible in adjustment and can be used for test tubes of different heights and diameters without replacing the components, it only has one position, the test tube placement hole 11 on the placement plate, to limit the test tubes. This results in poor stability when placing test tubes, and the test tubes are prone to tilting or even tipping over.

[0005] For example, a utility model with publication number 217796253 U discloses a test tube rack for food testing. Its base 1 has symmetrically arranged support plates 2, and a lifting plate 4 is slidably mounted on the support plates 2. The upper ends of the lifting plates 4 are connected by multiple horizontal plates 5, each with multiple mounting holes 12. The mounting holes 12 are symmetrically provided with second mounting grooves 13. A slider 14 is connected to the inner wall of the second mounting groove 13 via a second spring 15. A clamping plate 16 is provided at the end of the slider 14 away from the second spring 15. This test tube rack structure, where each mounting hole 12 is clamped by two clamping plates 16, can stably clamp the test tubes, but the structure is relatively complex. Furthermore, each time a test tube is placed or removed, the clamping plate 16 needs to be moved once, and the spring force must be resisted, making it time-consuming and laborious to use. Summary of the Invention

[0006] The purpose of this invention is to provide a test tube rack that overcomes the shortcomings of existing test tube racks that are either unstable or have a complex structure and are time-consuming and laborious to use.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0008] A test tube holder includes two side plates, a tray, and insertion sockets. The tray is horizontally positioned between the two side plates and is liftable. The insertion socket is a hollow base. At least one insertion socket is rotatably disposed between the two side plates, located above the tray. The insertion socket has at least two sets of test tube insertion holes of different sizes. Each set of test tube insertion holes includes at least one pair of test tube insertion holes distributed opposite each other on the side wall of the insertion socket. The center lines of all test tube insertion holes in the same set are located on the same plane parallel to the axis of rotation of the insertion socket, while the center lines of test tube insertion holes in different sets are located on different planes. The tray and the insertion socket are locked together by a locking mechanism.

[0009] Preferably, in the above technical solution, at least one insertion socket located below the tray is rotatably provided between the two side plates; and the specifications of each set of test tube insertion holes on the insertion socket located below the tray are different from the specifications of any set of test tube insertion holes on the insertion socket located above the tray.

[0010] Preferably, in the above technical solution, the socket is a hollow tube.

[0011] Preferably, in the above technical solution, at least one of the side plates can move closer to or further away from the other side plate to adjust the distance between the two side plates; when the distance between the two side plates is adjusted to the minimum position, the tray and the socket are locked by being pressed together by the two side plates, and each movable side plate can be locked by the locking mechanism.

[0012] Preferably, in the above technical solution, each movable side plate is provided with at least one longitudinal slide groove, and a slider connected to the support plate at one end is movably inserted in each longitudinal slide groove; the support plate can slide up and down along the corresponding longitudinal slide groove by means of the slider, and each movable side plate can move closer to or further away from the other side plate by means of the longitudinal slide groove on it along the corresponding slider.

[0013] Preferably, in the above technical solution, the locking mechanism is a pin; when the distance between the two side plates is adjusted to the minimum position, each movable side plate is connected to at least one slider on it through the pin to achieve locking.

[0014] Preferably, in the above technical solution, each side plate is provided with a handle on the plate surface opposite to the other side plate; the end of all the sliders on each movable side plate away from the other side plate is connected to a connecting plate. When the distance between the two side plates is adjusted to the minimum position, the connecting plate on each movable side plate and the handle can be connected by the pin to achieve locking.

[0015] Preferably, in the above technical solution, each movable side plate has a first pin hole and a second pin hole respectively provided on the handle and the connecting plate. When the distance between the two side plates is adjusted to the minimum position, the first pin hole and the corresponding second pin hole can be passed through by the pin at the same time, and at least one of the first pin hole and the corresponding second pin hole is connected to the pin by a threaded connection.

[0016] Preferably, in the above technical solution, each end of the socket is movably sleeved on a cylinder disposed on the side plate on the same side.

[0017] Preferably, in the above technical solution, at least one end of the socket and one of the cylinder on which it is sleeved are provided with a set of positioning slots with the same number as the number of test tube insertion holes, and the other is provided with a set of positioning blocks; or at least one end of the socket and one of the cylinder on which it is sleeved are provided with a set of positioning blocks with the same number as the number of test tube insertion holes, and the other is provided with a set of positioning slots; when the center lines of any set of test tube insertion holes of the socket are adjusted to be vertically distributed and the distance between the two side plates is at the minimum position, one set of positioning slots is engaged with one set of positioning blocks.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The insertion socket of this invention is hollow, and a test tube is inserted through a pair of oppositely distributed test tube insertion holes. This provides simultaneous upper and lower positioning of the test tube, effectively preventing it from tilting or tipping over, and ensuring good stability when inserting the test tube. Furthermore, the height of the support plate is adjustable, and the insertion socket can be rotated to select different sized test tube insertion holes to suit various test tubes. Its overall structure is simple, easy to adjust, and convenient to use, thus meeting the various daily work needs of medical personnel.

[0020] 2. In this invention, there are insertion sockets provided above and below the tray between the two side plates. The upper and lower insertion sockets can share the same liftable tray. The specifications of each set of test tube insertion holes on the upper and lower insertion sockets are different. By flipping the entire test tube rack upside down, different insertion sockets can be switched and different specifications of test tube insertion holes can be selected accordingly, thereby further improving applicability and making adjustments more flexible and convenient.

[0021] 3. This invention achieves simultaneous pressing or releasing of the tray and all sockets by moving the side plate, thus eliminating the need for separate locking structures for each socket or for setting different locking structures for the tray and sockets. This makes the locking mechanism simple in structure, convenient and quick to operate, and saves time and effort.

[0022] 4. The locking mechanism of the present invention is a pin, and a handle is provided on the movable side plate. The slider or the connecting plate connected to the slider and the handle can be locked together by the pin alone. The overall structure is simple, easy to operate, and has low operating cost. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the test tube holder of the present invention.

[0024] Figure 2 This is a three-dimensional structural diagram of the test tube holder of the present invention after omitting the insertion hole seat.

[0025] Figure 3 This is a three-dimensional structural diagram of the insertion socket of the test tube holder of the present invention.

[0026] Figure 4 This is a three-dimensional structural diagram of the tray of the test tube rack of the present invention.

[0027] Explanation of key figure labels:

[0028] 1-Side plate, 2-Support plate, 3-Insertion socket, 4-Longitudinal slide groove, 5-Slider, 6-Test tube insertion hole, 7-Pin, 8-Handle, 9-Connecting plate, 10-First pin hole, 11-Second pin hole, 12-Positioning slot, 13-Positioning block, 14-Cylinder. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines specific embodiments. However, it should be understood that the scope of protection of this invention is not limited to these specific embodiments. Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises," etc., will be understood to include the stated elements or components, without excluding other elements or other components.

[0030] Example 1

[0031] refer to Figures 1 to 4 The present invention provides a test tube holder, which includes two side plates 1, a support plate 2 and an insertion socket 3.

[0032] refer to Figure 1 Two side plates 1 are arranged opposite each other, and a support plate 2 is horizontally positioned between the two side plates 1 in a height-adjustable manner. Both side plates 1 and the support plate 2 can be rectangular, forming a horizontal "I" shape. The insertion socket 3 is a hollow base. At least one insertion socket 3 is rotatably positioned above the support plate 2 between the two side plates 1. To ensure a sufficient number of test tubes can be inserted, several insertion sockets 3 are generally arranged along a direction perpendicular to the rotation axis of the insertion socket 3, allowing multiple rows of test tubes to be placed on a single test tube rack. When the two side plates are arranged left-right opposite each other, the rotation axis of the insertion socket 3 is in the left-right direction, and the several insertion sockets 3 are distributed along the front-back direction. Specifically, the several insertion sockets 3 can be evenly spaced from front to back.

[0033] refer to Figure 1 and Figure 3 The socket base 3 is provided with at least two sets of test tube insertion holes 6 of different specifications. Each set of test tube insertion holes 6 includes at least one pair of test tube insertion holes 6 arranged opposite to each other on the side wall of the socket base 3. Since the socket base 3 is hollow, there is a certain distance between the test tube insertion holes 6 of the same pair. When inserting a test tube, after the test tube passes through the same pair of test tube insertion holes 6, the socket base 3 has two different positions at the top and bottom to limit the test tube, thereby improving the stability when placing the test tube. The center lines of all test tube insertion holes 6 in the same set are located on the same plane parallel to the rotation axis of the socket base 3, while the center lines of test tube insertion holes 6 in different sets are located on different planes. This makes all test tube insertion holes 6 in the same set distributed along the same straight line, while the test tube insertion holes in different sets are distributed at a certain angle along the rotation direction of the socket base 3. In this way, the socket base 3 can rotate to change the center line of any set of test tube insertion holes 6 while still being vertically distributed. Similarly, to ensure that a sufficient number of test tubes can be inserted, each group of test tube insertion holes 6 generally includes several pairs of test tube insertion holes 6 distributed along the rotation axis of the insertion hole seat 3. When the two side plates 1 are distributed opposite each other in the left-right direction, the several pairs of test tube insertion holes 6 in the same group are distributed from left to right along the same straight line, specifically, they can be distributed at equal intervals from left to right along the same straight line. After all the test tube insertion holes 6 of the same specification in all the insertion hole seats 3 are simultaneously vertically distributed, the support plate 2 is adjusted to a suitable height, so that test tubes of the corresponding specifications can be inserted stably row by row.

[0034] Each pair of test tube insertion holes 6 is arranged relatively on the side wall of the insertion seat 3, meaning that the two test tube insertion holes 6 in the same pair are 180 degrees apart. Generally, the hollow insertion seat 3 can be a hollow cuboid structure or a hollow tube structure. When the insertion seat 3 is a hollow cuboid structure, each end is mounted on one of the two side plates 1 via a pivot. One set of test tube insertion holes 3 can be set on each of the two pairs of relatively distributed side walls of the hollow cuboid insertion seat 3, allowing the insertion seat 3 to accommodate two sizes of test tubes. Alternatively, two or more sets of test tube insertion holes 3 can be set at a certain distance from each other on the same pair of side walls. However, this makes it easier to insert test tubes into the wrong holes 3 and results in a relatively large size for the insertion seat 3, making it less convenient to use and rotate. Therefore, refer to... Figure 3 Preferably, the socket base 3 is a hollow tube, which allows for the arrangement of several sets of test tube sockets 6 at equal intervals along its circumference as needed. Generally, two to three sets are sufficient. By rotating, any set of test tube sockets 6 can be adjusted to be vertically distributed, allowing test tubes of the corresponding specifications to be inserted through that set of test tube sockets 6. Other sets of test tube sockets 6 are not distributed in a vertical position. This structure makes the socket base 3 appropriately sized, the distribution of the test tube sockets 6 reasonable, and the test tubes not inserted into the wrong position, making it convenient to use and adjust.

[0035] refer to Figure 1 Furthermore, in this invention, at least one insertion seat 3 located below the tray 2 is rotatably arranged between the two side plates 1; and the specifications of each set of test tube insertion holes 6 on the insertion seat 3 located below the tray 2 are different from the specifications of any set of test tube insertion holes 6 on the insertion seat 3 located above the tray 2. In this invention, insertion seats 3 are provided both above and below the tray 2 between the two side plates 1, so that the upper and lower insertion seats 3 can share the same liftable tray 2, and the specifications of each set of test tube insertion holes 6 on the upper and lower insertion seats 3 are different. By flipping the entire test tube rack upside down, different insertion seats 3 can be switched for use. Furthermore, by adjusting the height of the tray 2, different specifications of test tube insertion holes 6 can be selected to place test tubes, further improving applicability and making adjustments more flexible and convenient.

[0036] After adjusting the positions of the insertion socket and the tray 2, they need to be locked in place to stably hold the test tubes. In this invention, the tray 2 and the insertion socket 3 are locked together by a locking mechanism. This locking mechanism could involve one locking unit for the tray 2 and one locking unit for each insertion socket 3, but such a structure is overly complex and cumbersome to operate. Preferably, at least one side plate 1 can move closer to or further away from the other side plate 1 to adjust the distance between the two side plates 1. This can be achieved by only the left or right side plate 1 moving left or right, or by both side plates 1 moving left or right. Preferably, both side plates 1 can move, facilitating locking or unlocking from either side. When the distance between the two side plates 1 is adjusted to its minimum position, the support plate 2 and the socket 3 are locked by being pressed together by the two side plates 1. Each movable side plate 1 can be locked by a locking mechanism. After locking, the two side plates 1 simultaneously press the support plate 2 and the socket 3 from both ends, restricting the lifting and lowering of the support plate 2 and the rotation of the socket 3. After the locking mechanism releases the side plates 1, slightly adjusting the distance between the two side plates 1 to increase their size will prevent the two side plates 1 from pressing against the ends of the support plate 2 and the socket 3, thus not affecting the lifting and lowering of the support plate 2 and the rotation of the socket 3. In this way, the locking mechanism only needs to set up a single locking unit for locking the two side plates 1, which greatly simplifies the structure. It eliminates the need for separate locking structures for each socket 3, and also eliminates the need for separate locking structures for the support plate 2 and the socket 3. This makes the locking mechanism simple in structure, convenient and quick to operate, and saves time and effort.

[0037] The pallet 2 can be raised and lowered by having two collars at each end of the pallet 2 movably engage with a side plate 1. Furthermore, by making any one of the collars slightly wider than the side plate 1, the corresponding side plate 1 can move left and right. (See reference...) Figure 1 and Figure 2 Preferably, each movable side plate 1 is provided with at least one longitudinal groove 4, and a slider 5, one end of which is connected to the support plate 2, is movably inserted in each longitudinal groove 4. The other end of the slider 5 extends beyond the side plate 1, allowing the slider 5 to slide both vertically and horizontally. In this way, the support plate 2 can slide vertically along the corresponding longitudinal groove 4 via the slider 5, and each movable side plate 1 can move closer to or further away from another side plate 1 via the longitudinal groove 4 along the corresponding slider 5. The cooperation of the slider 5 and the longitudinal groove 4 simplifies the lifting structure of the support plate 2.

[0038] When only one longitudinal slide groove 4 is set, the longitudinal slide groove 4 can be located in the middle of the side plate 1, and its groove width can be set to be larger. The slider 5 can also be set to be larger accordingly. After it is connected to the middle of the support plate 2, the overall structure is more stable. (Reference) Figure 1 and Figure 2 Preferably, in this invention, two parallel longitudinal grooves 4 are provided on the side plate 1 along a direction perpendicular to the rotation axis of the insertion socket 3. That is, when the two side plates 1 are distributed left and right, the two longitudinal grooves 4 of the movable side plate 1 are distributed front and back in parallel. In this way, the two sliders 5 that move through the two longitudinal grooves 4 are connected to the front and back sides of the support plate 2. By setting two longitudinal grooves 4 and two sliders 5 to cooperate with the support plate 2, the longitudinal grooves 4 and sliders 5 do not need to be too large. The support plate 2 is supported and moved through two points of action, and the overall structure is stable and reliable.

[0039] refer to Figure 1 Provided that at least one side plate 1 is movable, the locking mechanism of this invention is preferably a pin 7. When the distance between the two side plates 1 is adjusted to the minimum position, each movable side plate 1 is connected to at least one slider 5 on it via a pin 7 to achieve locking. Pin holes can be provided on one or more sliders 5, and a corresponding number of pins 7 that can move up and down can be provided on the side plates 1. When the distance between the two side plates 1 is at the minimum position, the pins 7 and pin holes are aligned one-to-one, so that each pin 7 is inserted into the corresponding pin hole to achieve locking. The pins 7 and pin holes are preferably interference fit or threaded connection fit to avoid gaps that could lead to insecure locking of the support plate 2. (Reference) Figure 2 and Figure 3More preferably, each side plate 1 has a handle 8 on the surface opposite to the other side plate 1, allowing the test tube holder to be lifted using the handles on both side plates 1. On each movable side plate, the end of all sliders 5 furthest from the other side plate is connected to a connecting plate 9; that is, one end of slider 5 is connected to the support plate 2, and the other end moves through the longitudinal groove 4 and connects to the connecting plate 9. When the distance between the two side plates 1 is adjusted to its minimum position, the connecting plate 9 on each movable side plate 1 and the handle 8 can be connected by a pin 7 to achieve locking. The pin 7 can be movably positioned on either the handle 8 or the connecting plate 9, with a corresponding pin hole on the other. When the distance between the two side plates 1 is at its minimum position, the pin 7 aligns with the pin hole, and the pin 7 is inserted into the pin hole to achieve locking. Through the cooperation of the handle 8 and the connecting plate 9, generally only one pin 7 is needed to achieve a secure locking. More preferably, each movable side plate 1 has a handle 8 and a connecting plate 9 respectively provided with a first pin hole 10 and a second pin hole 11. When the distance between the two side plates 1 is adjusted to the minimum position, the first pin hole 10 and the corresponding second pin hole 11 can be simultaneously passed through by the pin 7, and at least one of the first pin hole 10 and the corresponding second pin hole 11 is connected to the pin 7 by a threaded connection, so that both can be threaded connections. In this way, the locking mechanism of the present invention is the pin 7. The movable side plate 1 can lock the slider 5 or the connecting plate 9 connected to the slider 5 and the handle 8 together by only the pin 7. The overall structure is simple, easy to operate, and has low operating costs. When a socket 3 is also provided below the support plate 2, a handle 8 can be provided on the upper and lower sides of the side plate 1, and the first pin hole 10 on each of the two handles 8 is provided with a pin 7 by a threaded connection. The connecting plate 9 is provided with a corresponding second pin hole 11 as a screw hole, so as to achieve quick locking and unlocking. The handle 1 serves two purposes, the overall structure is simple, and it is easy to use.

[0040] refer to Figure 2 and Figure 3Provided that at least one side plate 1 can move, the two ends of each insertion socket 3 can be directly inserted through the through holes respectively provided on the two side plates 1 via two rotating shafts, so that it can both rotate and move horizontally. Preferably, each end of the insertion socket 3 is movably fitted onto a cylinder 14 provided on the same side plate, and the end of the insertion socket 3 has a circular hole that engages with the cylinder 14, thus allowing the insertion socket 3 to both rotate and move horizontally, so that the insertion socket 3 can rotate without affecting the movement of the side plate 1. More preferably, at least one end of the insertion socket 3 and one of the cylinder 14 on which it is fitted are provided with a set of positioning slots 12 with the same number of sets as the test tube insertion holes 6, and the other is provided with a corresponding set of positioning blocks 13. After adjusting the distance between the two side plates 1 to increase so that the positioning blocks 13 retract from the positioning slots 12 but do not leave the cylinder 14, the insertion socket 3 can rotate to adjust and select any set of test tube insertion holes 6. Alternatively, at least one end of the socket 3 and one of the cylinder 14 it is fitted with are provided with a set of positioning blocks 13, the same number as the number of test tube sockets 6, and the other is provided with a set of positioning slots 12. This allows the socket 3 to rotate even after the distance between the two side plates 1 is increased. When the center lines of any set of test tube sockets 6 on the socket 3 are vertically aligned and the distance between the two side plates 1 is minimized, one set of positioning slots 12 will align with the positioning blocks 13. After moving the side plates 1, the positioning slots 12 will engage with the aligned positioning blocks 13. This ensures that the selected set of test tube sockets 6 can be quickly adjusted to be vertically aligned, simplifying the adjustment and saving time.

[0041] The insertion socket 3 of this invention is hollow, and a test tube is inserted through a pair of oppositely distributed test tube insertion holes 6. This provides simultaneous upper and lower positioning of the test tube, effectively preventing it from tipping over or tilting, and ensuring good stability when inserting the test tube. Furthermore, the height of the support plate 2 is adjustable, and the insertion socket 3 can be rotated to select different sizes of test tube insertion holes 6 to suit various test tubes. Its overall structure is simple, easy to adjust, and convenient to use, thus meeting the various daily work needs of medical personnel.

[0042] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A test tube holder, comprising two side plates, a support plate, and an insertion socket; characterized in that, The tray is horizontally positioned between the two side plates in a way that allows it to be lifted and lowered. The insertion socket is a hollow seat; at least one insertion socket is rotatably disposed between the two side plates, located above the tray; the insertion socket is provided with at least two sets of test tube insertion holes of different specifications, each set of test tube insertion holes including at least a pair of test tube insertion holes arranged opposite to each other on the side wall of the insertion socket; the center lines of all test tube insertion holes in the same set are located on the same plane parallel to the rotation axis of the insertion socket, and the center lines of test tube insertion holes in different sets are located on different planes; The tray and the socket are locked together by a locking mechanism.

2. The test tube rack according to claim 1, characterized in that, At least one insertion socket located below the tray is rotatably disposed between the two side plates; and the specifications of each set of test tube insertion holes on the insertion socket located below the tray are different from the specifications of any set of test tube insertion holes on the insertion socket located above the tray.

3. The test tube rack according to claim 1, characterized in that, The socket is a hollow tube.

4. The test tube rack according to claim 1, characterized in that, At least one of the side plates is movable toward or away from the other side plate to adjust the distance between the two side plates; when the distance between the two side plates is adjusted to the minimum position, the tray and the socket are locked by being pressed together by the two side plates, and each movable side plate is locked by the locking mechanism.

5. The test tube rack according to claim 4, characterized in that, Each movable side plate is provided with at least one longitudinal slide groove, and a slider connected to the support plate at one end is movably inserted in each longitudinal slide groove; the support plate can slide up and down along the corresponding longitudinal slide groove via the slider, and each movable side plate can move closer to or further away from another side plate via the longitudinal slide groove on it along the corresponding slider.

6. The test tube rack according to claim 5, characterized in that, The locking mechanism is a pin; when the distance between the two side plates is adjusted to the minimum position, each movable side plate is connected to at least one slider on it via the pin to achieve locking.

7. The test tube rack according to claim 6, characterized in that, Each of the side plates has a handle on the plate surface opposite to the other side plate; the end of all the sliders on each movable side plate away from the other side plate is connected to a connecting plate. When the distance between the two side plates is adjusted to the minimum position, the connecting plate on each movable side plate and the handle can be connected by the pin to achieve locking.

8. The test tube rack according to claim 7, characterized in that, Each movable side plate has a handle and a connecting plate respectively provided with a first pin hole and a second pin hole. When the distance between the two side plates is adjusted to the minimum position, the first pin hole and the corresponding second pin hole can be passed through by the pin at the same time, and at least one of the first pin hole and the corresponding second pin hole is connected to the pin by a threaded connection.

9. The test tube rack according to claim 4, characterized in that, Each end of the socket is movably fitted onto a cylinder on the side plate located on the same side.

10. The test tube rack according to claim 9, characterized in that, At least one end of the socket and one of the cylinder on which it is sleeved are provided with a number of positioning slots that are the same as the number of test tube sockets, and the other end is provided with a corresponding set of positioning blocks; or at least one end of the socket and one of the cylinder on which it is sleeved are provided with a number of positioning blocks that are the same as the number of test tube sockets, and the other end is provided with a corresponding set of positioning slots. When the center lines of any group of test tube insertion holes in the insertion socket are vertically distributed and the distance between the two side plates is minimized, a set of positioning slots will be engaged with a set of positioning blocks.

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