Adjustable test tube rack for biological science teaching

Abstract

The utility model discloses an adjustable test -tube rack for biological science teaching instrument, including base, the periphery of base is equipped with the slot of going up in the circumference, install the support on the base, and the every slot of support is formed with the protruding at the outside, and the bottom of any protruding is all movably installed with the limiting ring, and the protruding swing joint of every has the pull rod of vertical arrangement, and the pull rod is connected with the cover block above the protruding, and the protruding is located at the limiting ring and is equipped with the horizontal accommodation slot, and the inner wall of accommodation slot is connected with the spring. The utility model first through setting up the spring and gather the limiting ring's mode extrude the test tube of inserting, make up the gap between the limiting ring and test tube, second, through the pull rod of setting up and drive the cover block, and the pull rod can drive the cover block and lift up to adapt the position of test tube taking out, namely, can always cover the open mouth portion of test tube when taking, and placing test tube, and further avoid the solution splashing problem caused by the shaking.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment technology, specifically an adjustable test tube rack for biological science teaching instruments. Background Technology

[0002] A test tube rack is a type of chemical laboratory equipment, a basic instrument used to store and dry test tubes. Current test tube racks have round holes and small wooden posts for inserting test tubes. For ease of access, the inner diameter of the insertion hole is often larger than the outer diameter of the test tube, creating a gap between the hole and the tube. Therefore, when moving the rack, the outer wall of the test tube can easily collide with the insertion hole, causing the tube to shake and potentially splashing liquid inside.

[0003] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an adjustable test tube rack for biological science teaching instruments, solving the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adjustable test tube rack for biological science teaching instruments, comprising a base, slots circumferentially formed around the base, a support mounted on the base, a protrusion formed at each slot on the outer side of the support, a limiting ring movably mounted at the bottom of each protrusion, a vertically arranged pull rod movably connected to each protrusion, a cover block connected above the protrusion, a horizontal receiving groove formed at the limiting ring on the protrusion, a spring connected to the inner wall of the receiving groove, a support block inserted into the receiving groove mounted on the inner side of the limiting ring, and the free end of the outer side of the spring connected to the support block.

[0008] Preferably, the inner diameter of the limiting ring is larger than the radial dimension of the test tube, creating extra space for the test tube to be inserted, and the center line of the limiting ring is located radially inside the center line of the lower slot.

[0009] Preferably, each of the protrusions has a hole extending through its upper end, and the lower part of the pull rod is slidably connected within the hole.

[0010] Preferably, the size of the cover block is larger than the opening size of the test tube so as to completely cover the test tube, and a handle is connected to the upper part of the cover block.

[0011] Preferably, a pull handle is formed in the middle of the support, and the pull handle is higher than the height of the cover block under normal conditions.

[0012] (III) Beneficial Effects

[0013] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: This utility model is an adjustable test tube rack for biological science teaching instruments. First, it squeezes the inserted test tube by setting a spring-loaded limiting ring, so as to fill the gap between the limiting ring and the test tube. Second, the set pull rod drives the cover block. Pulling the pull rod upward can drive the cover block to be lifted together to adapt to the position of the test tube being taken out. That is, while taking out and putting in the test tube, the open mouth of the test tube can always be covered, thereby avoiding the problem of solution splashing caused by shaking. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the test tube assembly of this utility model;

[0016] Figure 3 This is a side view of the test tube assembly of this utility model;

[0017] Figure 4 This is a partial disassembly diagram of the bottom of this utility model.

[0018] In the diagram: 1. Base; 2. Support; 3. Pull rod; 4. Cover block; 5. Pull handle; 6. Test tube; 7. Limiting ring; 8. Slot; 9. Handle; 10. Receiving groove; 11. Spring. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-3 As shown: An adjustable test tube rack for biological science teaching instruments includes a base 1. The base 1 has slots 8 around its periphery, which can be used to place test tubes 6 one by one. A support 2 is installed in the middle of the base 1. Each slot 8 on the outer side of the support 2 has a protrusion. A limit ring 7 is movably installed at the bottom of any protrusion, which, together with the slot 8 at the bottom, limits the test tube 6.

[0021] Each protrusion has a through hole at its upper end, into which a pull rod 3 is inserted. The pull rod 3 extends out from the top of the protrusion and connects to a cover block 4 on its outer side. The pull rod 3 is inserted into the hole, and by pulling it upward, the cover block 4 can be lifted to match the position where the test tube 6 is taken out, so that the open mouth of the test tube 6 can always be covered while the test tube 6 is being taken out and put in.

[0022] See appendix Figure 4As shown, each protrusion is provided with a horizontal receiving groove 10 at the limiting ring 7. A spring 11 is connected to the horizontal inner wall of the receiving groove 10. A support block is installed inside the receiving groove 10 on the inner side of the limiting ring 7. The outer free end of the spring 11 is connected to the support block.

[0023] The inner diameter of the limiting ring 7 is slightly larger than the radial dimension of the test tube 6, creating extra space for the test tube 6 to be inserted. The center line of the limiting ring 7 is located radially inside the center line of the lower slot 8. When inserting the test tube 6, it is necessary to move the test tube 6 slightly outward to insert it into the lower slot 8, so that the limiting ring 7 can play a certain locking effect after the test tube 6 is inserted, preventing problems such as shaking.

[0024] See appendix Figure 2-3 In use, first lift the capping block 4 upwards, then move the test tube 6 horizontally until it abuts against the underside of the capping block 4, forming a seal for placing / removing the test tube 6 and preventing leakage due to shaking. After aligning the bottom of the test tube 6 with the limiting ring 7, it can be moved downwards to the slot 8 at the bottom. At this time, the limiting ring 7 can be moved slightly outwards simultaneously to complete the placement of the test tube 6. Throughout the process, the capping block 4 always covers the top of the test tube 6. Secondly, after the test tube 6 is placed, the limiting ring 7 is held in place by the inward restoring force of the spring 11, preventing the test tube 6 from shaking during the movement due to excess space between it and the test tube 6.

[0025] The size of the lid block 4 is slightly larger than the opening size of the test tube 6, so that the test tube 6 can be completely covered. The upper part of the lid block 4 is connected to a handle 9, which makes it easy to lift the lid block 4.

[0026] A handle 5 is formed in the middle of the support 2, and the handle 5 is higher than the height of the cover block 4 under normal conditions, which makes it easy to lift and put the test tube 6 away by hand.

[0027] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. An adjustable test tube rack for biological science teaching instruments, comprising a base, characterized in that: The base has slots circumferentially arranged around its perimeter. A support is installed on the base. Each slot on the outer side of the support has a protrusion. A limit ring is movably installed at the bottom of each protrusion. Each protrusion is movably connected to a vertically arranged pull rod. A cover block is connected to the pull rod above the protrusion. A horizontal receiving groove is formed at the limit ring on the protrusion. A spring is connected to the inner wall of the receiving groove. A support block is installed inside the receiving groove on the inner side of the limit ring. The free end of the spring is connected to the support block.

2. The adjustable test tube rack for biological science teaching instruments according to claim 1, characterized in that: The inner diameter of the limiting ring is larger than the radial dimension of the test tube, creating extra space for the test tube to be inserted. The center line of the limiting ring is located radially inside the center line of the slot below.

3. The adjustable test tube rack for biological science teaching instruments according to claim 1, characterized in that: Each of the protrusions has a hole extending through its upper end, and the lower part of the pull rod is slidably connected to the hole.

4. The adjustable test tube rack for biological science teaching instruments according to claim 1, characterized in that: The size of the cover block is larger than the opening size of the test tube so as to completely cover the test tube, and a handle is connected to the upper part of the cover block.

5. The adjustable test tube rack for biological science teaching instruments according to claim 1, characterized in that: A pull handle is formed in the middle of the support, and the pull handle is higher than the height of the cover block under normal conditions.

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