Test tube rack with rotatable test tubes

Abstract

The utility model discloses a test tube rack with rotatable test tubes for a laboratory. The test tube rack comprises a sleeve rotating wheel and a rubber band, the rubber band is 8-shaped and is matched with the wrap angle of the sleeve rotating wheel; the sleeve rotating wheel comprises an upper wheel, a rivet, a rubber sheet, a lower wheel and a sleeve; grooves matched with the rubber bands are formed in the peripheral surfaces of the upper wheel and the lower wheel; a rubber sheet is arranged between the upper wheel and the lower wheel; the three wheels are fixedly connected into a whole through rivets; the sleeve is fixed on the lower end surface of the lower wheel and inserted into the test tube placing hole. The rubber sheet is a fan-shaped sheet, and the diameter of an inner hole of the combined circular sheet is smaller than the outer diameter of a test tube barrel, so that a test tube can be conveniently inserted and can be driven to rotate. The test tube rack is improved on the basis of the structure of an original test tube rack, the cranks are rotated to rotate the test tubes, a plurality of test tubes can be disinfected at one time, and the efficiency is improved.

Description

Technical Field

[0001] The utility model is applied to aseptic operation in laboratories, and relates to a test tube rack for disinfecting the mouth of a test tube with an alcohol lamp, in particular to a test tube rack with rotatable test tubes. Background Art

[0002] In a food department laboratory, a culture medium for culturing yeast is placed in a test tube, and the test tube is placed on a test tube rack on an aseptic operation table. To ensure the sterility of the culture medium in the test tube, the mouth of the test tube needs to be disinfected with the flame of an alcohol lamp. Generally, the area within a radius of five centimeters centered on the flame of the alcohol lamp is considered sterile. To achieve the baking of the test tube mouth by the flame of the alcohol lamp, the test tube rack needs to be tilted, and then the test tube is rotated. This aseptic operation requires two people to cooperate on opposite sides of the aseptic operation table, with openings on opposite sides of the operation table. One person tilts the test tube rack, and the other person holds the alcohol lamp and rotates the test tube to bake the mouth of the test tube for aseptic operation. The applicant previously applied for a tiltable test tube rack (CN2024220359020), which can be operated by one person. After the test tube rack is tilted and fixed, the test tube still needs to be rotated manually. The test tube rotation operation not only requires carefulness to prevent knocking the test tube placement plate, but also causes finger soreness during the aseptic disinfection operation of multiple test tubes. Therefore, on the basis that the test tube rack can be tilted, it is necessary to design a test tube rack with rotatable test tubes.

[0003] There are many patent applications for test tube rotation mechanisms or devices, such as CN218471306U, a test tube rotation mechanism and a test tube rotation and scanning device; CN108268809B, a test tube rotation mechanism and a test tube rotation and scanning device; CN215117541U, a blood collection test tube rotation and scanning device; CN214486601U, a test tube rotation mechanism, etc. All of them rotate the test tube upright, which is convenient for scanning and identification.

[0004] A test tube rack with rotatable test tubes disclosed in CN205413112U. The test tube is inserted through a through hole at the top of the rack body, and the bottom end of the test tube is located in a fixed base. The rack cap rotates with the moving rod and then moves downward along the sliding groove. The moving rod passes through the buckle plate to reach the bottom of the sliding groove. The fixed top seat on the rack cap is sleeved on the top end of the test tube. When the test tube needs to be shaken, the motor is turned on. The motor drives the fixed base and the first rotating block to rotate in the moving groove, thereby driving the test tube to rotate. The rotation of the top end of the test tube drives the fixed top seat and the second rotating block to rotate in the moving groove. The test tube rotates upright and relatively fast when rotating in this patent, and these characteristics are not suitable for disinfecting the mouth of the test tube with an alcohol lamp. Content of the Utility Model

[0005] The technical problem solved by the utility model is to provide a test tube rack with rotatable test tubes, which drives the test tubes to rotate by using rubber bands and runners, does not use electricity, is convenient to operate, and is suitable for flame disinfection of the mouths of test tubes.

[0006] The technical solution adopted by the utility model is as follows: The test tube rack with rotatable test tubes includes a sleeve runner and a rubber band. The rubber band is in an "8" shape and cooperates with the sleeve runner; the sleeve runner includes an upper wheel, a rivet, a rubber sheet, a lower wheel, and a sleeve; grooves for cooperating with the rubber band are machined on the outer circumferential surfaces of the upper wheel and the lower wheel; the rubber sheet is arranged between the upper wheel and the lower wheel, and the three are fixedly connected into one body through the rivet; the sleeve is fixedly connected to the lower end surface of the lower wheel and cooperates with the test tube placement hole on the upper plate of the test tube rack.

[0007] Further, the rubber sheet is composed of 3-6 identical sector pieces, which are evenly distributed in a circle to form a circular sheet, and the inner hole diameter of the circular sheet is smaller than the outer diameter of the test tube barrel. The use of sector pieces is only to reduce the deformation resistance of the rubber sheet. The more sector pieces there are, the more rivets there are. It is advisable to have 4 sector pieces.

[0008] Further, for the convenience of test tube rotation operation, a crank is fixedly arranged on the sleeve runner at the end.

[0009] The beneficial effects of the utility model are as follows: The utility model is an improvement on the original test tube rack structure, with a simple structure and convenient operation, and can realize the alcohol lamp disinfection of multiple test tube mouths at one time, improving the efficiency. Description of the Drawings

[0010] Figure 1 is the front view schematic diagram of the utility model;

[0011] Figure 2 is Figure 1 the left view schematic diagram of

[0012] Figure 3 is Figure 2 the top view schematic diagram of

[0013] Figure 4 is the front view schematic diagram of the sleeve runner;

[0014] Figure 5 is Figure 4 the top view schematic diagram of

[0015] Figure 6 is the working state schematic diagram of the utility model;

[0016] In the figure: 1 - test tube rack, 2 - sleeve runner, 3 - suction cup shaft, 4 - arc plate, 5 - test tube, 6 - crank, 7 - rubber band;

[0017] 11 - upper plate, 12 - lower plate, 13 - placement hole;

[0018] 21 - upper wheel, 22 - rivet, 23 - rubber sheet, 24 - lower wheel, 25 - sleeve; Detailed Implementation Modes

[0019] The structure of the test tube rack with rotatable test tubes of the present utility model is as shown in the appendix Figures 1-3 and includes a test tube rack 1, a sleeve runner 2, and a rubber band 7. The test tube rack 1 is purchased externally and includes an upper plate 11, a lower plate 12, and support legs. Test tube placement holes 13 are machined on the upper plate 11. Usually, the aperture of the placement hole 13 is larger than the outer diameter of the test tube to facilitate the insertion and placement operation of the test tube. The upper surface of the lower plate 12 is designed with an arc-shaped concave pit, which cooperates with the placement hole and corresponds to the shape of the bottom of the test tube to stabilize the test tube.

[0020] The structure of the sleeve runner 2 is as shown in the appendix Figure 4 and in the appendix Figure 5 and includes an upper wheel 21, a rivet 22, a rubber sheet 23, a lower wheel 24, and a sleeve 25. Grooves are machined on the outer circumferential surfaces of the upper wheel 21 and the lower wheel 24. The grooves cooperate with the rubber band 7. After the rubber band 7 is elastically stretched, the frictional force generated between the rubber band and the grooves drives the sleeve runner 2 to rotate. A rubber sheet 23 is arranged between the upper wheel 21 and the lower wheel 24, and the three are fixedly connected into one body by the rivet 22. The rubber sheet 23 is composed of 3 - 6 identical fan-shaped sheets to form a circular sheet. The inner diameter of the combined circular sheet is smaller than the outer diameter of the tube barrel of the test tube. When the test tube is inserted into the inner hole of the rubber sheet 23, the rubber sheet elastically deforms, as shown in the partial cross-sectional view of the appendix Figure 2 . The reason for using multiple fan-shaped rubber sheets is only to reduce the deformation resistance of the rubber sheet and facilitate the insertion operation of the test tube. The more the number of fan-shaped sheets, the smaller the deformation resistance, but the more the number of rivets 22. In this embodiment, four fan-shaped rubber sheets 23 are used, as shown in the appendix Figure 5 and shown. The deformation force of the elastic deformation of the rubber sheet is used to constrain and fix the test tube. At the same time, the deformed rubber sheet generates frictional force with the outer wall of the test tube barrel. This frictional force can drive the test tube to rotate when the sleeve runner 2 rotates. Since the four rubber sheets are evenly distributed, the rotation center of the test tube is concentric with the rotation center of the sleeve runner. Even if the two are slightly eccentric, the rotation of the test tube mouth will not deviate from the flame of the alcohol lamp, and it will not affect the disinfection of the test tube mouth. On the bottom surface of the lower wheel 24, the sleeve 25 is fixedly connected. The sleeve 25 cooperates with the placement hole 13 of the test tube and can be inserted into the placement hole 13 with a clearance fit and can rotate under the constraint of the placement hole 13.

[0021] The rubber band 7 is in an "8" - shaped wrap - angle fit with the sleeve runner 2, as shown in the appendix Figure 3 and shown. At the end sleeve runner 2, the direction of the rubber band needs to be changed, as shown in the appendix Figure 2The right view. When the upper wheel of the middle sleeve runner cooperates with the rubber band, the end sleeve runner changes the cooperation direction of the rubber band to cooperate with the groove of the lower wheel, thus forming an "8"-shaped cooperation. The advantage of the "8"-shaped cooperation is that it increases the wrap angle of the rubber band with the sleeve runner and the contact area with the groove, thereby increasing the friction force and facilitating the rotation of the sleeve runner. The larger the outer diameter of the upper and lower wheels, the larger the wrap angle and the less likely the rubber band is to slip. For ease of operation, a crank 6 is fixedly arranged on the end sleeve runner.

[0022] A tiltable test tube rack (CN2024220359020) applied previously has its bottom of the test tube rack leg movably connected to the suction cup shaft 3 and can rotate around the suction cup shaft 3. An arc plate 4 is also installed on the bottom side of the lower plate 12 of the test tube rack in the same structural form of the suction cup shaft. The suction cup of the suction cup shaft can be pressed down to be fixed by atmospheric pressure, so as to realize the fixed installation of the arc plate 4, and moreover, the position can be adjusted arbitrarily according to needs.

[0023] When the utility model is in use, as shown in the attached Figure 6 figure, the arc plate is pressed down, the arc plate contacts the tabletop, the rotating shaft end of the arc plate is lifted, so that the test tube rack rotates and tilts around the suction cup shaft. When it rotates to the required angle, the suction cup shaft is sleeved into the notch of the arc plate, and the suction cup adsorbs and fixes it. At this time, the flame of the alcohol lamp can be aligned with the mouth of the test tube for flame disinfection, and then the crank is operated to rotate the end sleeve runner. The other sleeve runners are driven to rotate through the rubber band, and the rubber sheet on the sleeve runner drives the test tube to rotate. Since the liquid culture medium is placed in the test tube, the rotation speed of the test tube is relatively slow, and it is sufficient to disinfect the mouth of the test tube with the alcohol lamp.

[0024] It should be noted that 1) the attached Figure 1 figure and the attached Figure 3 figure show the structural schematic diagrams that can tilt in two directions. Usually, only tilting in one direction is required. To ensure the stability of the test tube rack when the test tube rotates, the arc plates on both sides should be in the same direction, and the two lower plate suction cup shafts increase the safety of adsorption and fixation. 2) Even if the test tube rack does not tilt, the utility model can still realize the rotation of the test tube when the test tube is upright. 3) If a flexible rubber sheet with relatively small deformation resistance is used, a whole circular rubber sheet can also be used.

[0025] The structure of the utility model is simple. The upper and lower wheels are made of plastic and connected by plastic welding of rivets. The sleeve is connected to the lower wheel by plastic welding. Without changing the structure of the test tube rack, on the basis of the original test tube rack, a sleeve runner is sleeved in the placement hole on the side of the test tube rack and connected with a rubber band. The investment is small and the effect is quick. Even if the mouths of multiple test tubes need to be disinfected by flame, insert multiple test tubes into the sleeve runner at the same time, and the multiple test tubes rotate simultaneously. Place an alcohol lamp at the mouth of each test tube for disinfection. If there are not enough alcohol lamps, after the disinfection operation of one test tube mouth is completed, move the alcohol lamp horizontally and align the flame with the mouth of the next test tube for disinfection. This operation only requires turning the crank and does not require turning the test tubes with fingers, reducing the operating burden on the fingers.

[0026] After the disinfection operation of the test tube mouths is completed, take out the sleeve runner and the rubber band in the placement hole, remove all the suction cup shafts, and restore the test tube rack to its original state without affecting the structure and original function of the test tube rack.

Claims

1. A test tube rack with rotatable test tubes, characterized in that: It includes a sleeve runner (2) and a rubber band; the rubber band is in an "8" shape and cooperates with the sleeve runner (2); the sleeve runner (2) includes an upper wheel (21), a rivet (22), a rubber sheet (23), a lower wheel (24), and a sleeve (25); grooves for cooperating with the rubber band are machined on the outer circumferential surfaces of the upper wheel (21) and the lower wheel (24); a rubber sheet (23) is arranged between the upper wheel (21) and the lower wheel (24), and the three are fixedly connected into one body through a rivet (22); the sleeve (25) is fixedly connected to the lower end surface of the lower wheel (24) and cooperates with the test tube placement hole on the upper plate of the test tube rack.

2. The test tube rack with rotatable test tubes according to claim 1, wherein: The rubber sheet (23) is composed of 3 - 6 identical sector-shaped sheets, which are circumferentially evenly distributed and combined into a circular sheet, and the inner hole diameter of this circular sheet is smaller than the outer diameter of the test tube barrel.

3. A test tube rack with rotatable test tubes according to claim 2, characterized in that: The rubber sheet (23) is composed of 4 sector-shaped sheets.

4. A test tube rack with rotatable test tubes according to claim 1, characterized in that: A crank is fixedly arranged on the sleeve runner (2) located at the end.

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