Positioning chuck and adapter

Abstract

The utility model relates to the technical field of centrifugal machine accessories, and particularly discloses a positioning chuck and an adapter, which comprise a circular ring, four positioning claws are formed at the bottom of the circular ring in an equidistant extending manner; a claw root is formed on the portion, protruding out of the circular ring, of the positioning claw, the positioning claw forms the claw root and then inclines and bends towards the circle center of the circular ring to form a claw middle, the positioning claw forms a claw head which bends backwards to form the claw middle, and the lower end of the claw head tilts outwards. A circle formed by the claw heads is coaxial with the circle center of the circular ring; the outer side of the claw middle and the outer side of the claw head are provided with folded V-shaped arcs, and the overlooking section of the claw middle and the overlooking section of the claw head are in a V shape. The positioning chuck is made of metal, and has the advantage of being long in service life compared with an existing positioning chuck formed through injection molding; the strength and the rigidity of the claw head and the claw middle part are improved, the rebound resilience is enhanced, the service life is prolonged, and scratches caused by contact between the test tube and the edge of the positioning claw can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuge accessories, and particularly relates to a positioning chuck and an adapter. Background Technique

[0002] At present, the market application scenario requires that the automated production line can process different types of samples, and further requires that the centrifuge can process test tube carriers with different tube diameters and heights; most test tubes with tube diameters from 12 mm to 16 mm are used in the market, and currently, most adapters can be used compatibly, but there are more or less some drawbacks. For example, the large number of parts in the adapter leads to assembly errors, the poor effect of straightening the test tube causes the test tube to tilt, the poor ability of the test tube to return to the correct position affects the position accuracy, or it damages the test tube label and other problems.

[0003] The positioning chucks used in adapters on the market are three-jaw and four-jaw. Although both the three-jaw and four-jaw can be compatible with test tubes with tube diameters from 12 mm to 16 mm, it is found through a large number of test tests that their service life is short. The types of test tubes used in the medical field, biological field, and pharmaceutical field are uneven and cannot be unified, which greatly shortens the service life of the positioning chuck or causes the phenomenon of broken jaws and failure; in order to better meet the market demand, there is an urgent need for a positioning chuck and an adapter with a long service life, no broken jaws, and good straightening effect. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a positioning chuck, which has the advantage of long service life of the positioning chuck and solves the problems in the background technique.

[0005] A positioning chuck includes: a circular ring, and four positioning claws are formed at equal distances at the bottom of the circular ring; a claw root is formed at the part of the positioning claw protruding from the circular ring, after the positioning claw forms the claw root, it is inclined and bent towards the center of the circular ring to form a claw middle, after the positioning claw forms the claw middle, it is bent to form a claw head, and the lower end of the claw head is tilted outwards; the circle formed by the claw head is coaxial with the center of the circular ring;

[0006] A folded V arc is provided on the outer sides of the claw middle and the claw head, and the top view section of the claw middle and the claw head is V-shaped.

[0007] An adapter includes the above-mentioned positioning chuck, as well as an adapter base and an adapter cover plate;

[0008] A first test tube hole and a mating hole are provided on the adapter base, a second test tube hole corresponding to the first test tube hole is provided on the adapter cover plate, and a positioning column adapted to the mating hole is fixedly connected to the bottom of the adapter cover plate, and the fixation is achieved through the interference fit of the positioning column inserted into the mating hole.

[0009] A docking groove for fitting with a circular ring of a positioning chuck is provided at the top of the first test tube hole, and an avoidance groove for corresponding positioning claws is provided at the bottom of the docking groove.

[0010] A circular groove corresponding to the docking groove is provided at the bottom edge of the second test tube hole of the adapter cover plate, and a limiting platform is provided on the inner side surface of the circular groove.

[0011] A convex lip is fixedly connected downward at the edge where the circular groove coincides with the second test tube hole.

[0012] An upper notch is provided on the circular ring of the positioning chuck, and a radial platform adapted to the upper notch is provided inside the circular groove.

[0013] An upper bottom arc is provided at the bottom of the first test tube hole, and a lower bottom arc is provided below the upper bottom arc.

[0014] It further includes a handle rod, a hose is sleeved on the handle rod, and a handle cap is provided at the top of the handle rod;

[0015] Mounting holes for installing the handle rod are provided at the centers of the adapter base and the adapter cover plate, and a magnetic steel is installed at the center of the bottom of the adapter base.

[0016] Its positioning chuck is integrally formed in one continuous piece from a stainless steel spring sheet with good elastic modulus. The shape, size of its positioning claws and the accuracy of the claw holes are precisely controlled. It is clamped into the circular groove of the adapter cover plate, and mainly supports test tubes with different diameters through the claw head or claw center of the positioning chuck; its adapter cover plate is injection-molded and fixed above the adapter base through the interference fit between the positioning posts of the adapter cover plate and the mating holes of the adapter base, mainly used to fix the positioning chuck and ensure that the positioning chucks are arranged at specified intervals.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. The positioning chuck of the present utility model is made of metal, which has the advantage of high service life compared with the existing injection-molded positioning chuck. And through the setting of the folded V arc in the positioning chuck, the strength and rigidity of the claw head and claw center are increased, thereby enhancing the resilience and service life. Moreover, the setting of the folded V arc can prevent the test tube from contacting the edge of the positioning claw to form scratches.

[0019] 2. The convex lip in the present utility model is located in the second test tube hole of the adapter cover plate. Its main function is to prevent the upper part of the test tube positioning chuck from directly contacting the test tube. During the centrifugation process, the adapter cannot be completely horizontal, which will cause the test tube to have a certain inclination angle. The upper part of the test tube will lean on the convex lip instead of directly contacting the positioning chuck, so that no imprint will be left on the test tube or the label paper will not be damaged. Description of the Drawings

[0020] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0021] Figure 1 is a schematic structural diagram of an exploded view of the adapter of the present utility model;

[0022] Figure 2 is a schematic structural diagram of an assembly drawing of the adapter and the positioning chuck of the present utility model;

[0023] Figure 3 is a schematic structural diagram of a front view and a cross-sectional view of the positioning chuck of the present utility model;

[0024] Figure 4 is a schematic structural diagram of a forming process drawing of the positioning chuck of the present utility model;

[0025] Figure 5 is a schematic structural diagram of a front view and a cross-sectional view of the adapter base of the present utility model;

[0026] Figure 6 is a schematic structural diagram of a front view, a cross-sectional view and a partial enlarged view of the adapter cover of the present utility model.

[0027] In the figure: 1. Adapter cover; 1.1. Positioning post; 1.2. Limiting platform; 1.3. Radial platform; 1.4. Convex lip; 1.5. Circular groove; 2. Positioning chuck; 2.1. Ring; 2.2. Upper notch; 2.3. Claw root; 2.4. Claw middle; 2.5. Folded V arc; 2.6. Claw head; 3. Adapter base; 3.1. Diamond hole; 3.2. Matching hole; 3.3. Lower bottom arc; 3.4. Upper bottom arc; 3.5. Avoidance groove; 3.6. Docking groove; 4. Handle rod; 5. Hose; 6. Handle cap; 7. Magnet; 8. First test tube hole; 9. Second test tube hole; 10. Mounting hole. Detailed embodiments

[0028] Hereinafter, multiple embodiments of the present utility model will be disclosed with reference to the drawings. For the sake of clarity, many physical details will be described in the following description. However, it should be understood that these physical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these physical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known and commonly used structures and components will be shown in a simple schematic manner in the drawings.

[0029] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes, not specifically referring to the order or sequence, nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] Please refer to Figure 1 and Figure 2 , the adapter of the present utility model is composed of an adapter cover plate 1, a positioning chuck 2, an adapter base 3, a handle rod 4, a hose 5, a handle cap 6, and a magnet 7;

[0031] Please refer to Figure 3 , the positioning chuck 2 includes a circular ring 2.1, and four positioning claws are formed by equidistantly extending from the bottom of the circular ring 2.1; a claw root 2.3 is formed at the part where the positioning claw protrudes from the circular ring 2.1. After the positioning claw forms the claw root 2.3, it is inclined and bent towards the center of the circular ring 2.1 to form a claw middle 2.4. After the positioning claw forms the claw middle 2.4, it is bent to form a claw head 2.6, and the lower end of the claw head 2.6 warps outwards;

[0032] The circle formed by the claw head 2.6 is coaxial with the center of the circular ring 2.1.

[0033] A folded V arc 2.5 is provided on the outer sides of the claw middle 2.4 and the claw head 2.6, and the top view cross-section of the claw middle 2.4 and the claw head 2.6 is V-shaped.

[0034] Its circular ring 2.1 serves as the main body of the positioning chuck 2, mainly playing a role in connecting the claw roots 2.3 and being symmetrically distributed along the circumference; its claw roots 2.3 are located below the circular ring 2.1, mainly used to connect the claw middle 2.4 and transmit torque; its claw middle 2.4 is located between the claw roots 2.3 and the claw head 2.6, mainly used to guide the test tube; its claw head 2.6 is located at the lowermost part of the positioning chuck 2, and the tail warps slightly outwards, mainly used to support the upper part of the small-diameter test tube, and at the same time can prevent the label paper from being damaged during insertion and extraction; its folded V arc 2.5 is located on the claw head 2.6 and the claw middle 2.4, and its main function is to increase the strength and rigidity of the claw head 2.6 and the claw middle 2.4, thereby enhancing the resilience and service life; the positioning chuck 2 adopts a process of continuous forming of a stainless steel spring sheet in one mold, with good corrosion resistance, good consistency, and guaranteed coaxial accuracy. Whether using large-diameter or small-diameter test tubes, the deformation of the claw roots 2.3 is within the elastic range and there will be no brittle fracture phenomenon;

[0035] Please refer to Figure 5 , the adapter base 3, which consists of a first test tube hole 8, a diamond-shaped hole 3.1, a mating hole 3.2, a lower bottom arc 3.3, an upper bottom arc 3.4, a docking groove 3.6 and an avoidance groove 3.5;

[0036] The mating holes 3.2 are symmetrically distributed on the upper surface of the adapter base 3. Through the interference fit with the positioning posts 1.1 of the adapter cover plate 1, the function of fixing and positioning the adapter cover plate 1 is realized; the lower bottom arc 3.3 is located at the bottom of the first test tube hole 8 of the adapter base 3, mainly used to support the bottom of the small-diameter test tube, playing a role of support and centering, ensuring that the bottom of the test tube is located in the center of the first test tube hole 8; the upper bottom arc 3.4 is located above the lower bottom arc 3.3, mainly used to support the bottom of the large-diameter test tube, playing a role of support and centering, ensuring that the bottom of the test tube is located in the center of the first test tube hole 8; the docking groove 3.6 and the avoidance groove 3.5 located at the top of the first test tube hole 8. When the test tube is inserted, the claw heads 2.6 and the claw middles 2.4 of the positioning chuck 2 will deform outward and retreat into the avoidance groove 3.5, mainly providing an avoidable rectangular space;

[0037] Please refer to Figure 6 , the adapter cover plate 1, which consists of a positioning post 1.1, a shape-limiting platform 1.2, a radial platform 1.3, a convex lip 1.4 and a circular groove 1.5; the positioning posts 1.1 are symmetrically and evenly distributed around the periphery and at the center of the adapter cover plate 1, mainly forming an interference fit with the mating holes 3.2 of the adapter base 3, playing a role of fixing and limiting, ensuring that the adapter cover plate 1 can fit on the upper surface of the adapter base 3, effectively reducing the peripheral fitting gap; the shape-limiting platform 1.2 is located in the circular groove 1.5 and is evenly distributed along its circumference, mainly used to clamp the positioning chuck 2, preventing the upper ring 2.1 of the positioning chuck 2 from deforming under force and transmitting the load to the adapter cover plate 1; the radial platform 1.3 is also located in the circular groove 1.5, and an upper notch 2.2 adapted to the radial platform 1.3 is provided on the ring 2.1, mainly used to prevent the positioning chuck 2 from rotating along the circumference and affecting the consistency of test tube straightening; the convex lip 1.4 is located in the second test tube hole 9 of the adapter cover plate 1, and its main function is to prevent the upper part of the test tube positioning chuck 2 from directly contacting the test tube. During the centrifugation process, the adapter cannot be completely horizontal, which will cause the test tube to have a certain inclination angle. The upper part of the test tube will lean on the convex lip 1.4 instead of directly contacting the positioning chuck 2, so that no imprint will be left on the test tube or the label paper will not be damaged; the circular groove 1.5 is located on the lower surface of the adapter cover plate 1 and is evenly distributed together with the second test tube hole 9, mainly playing a role of shaping and covering the ring 2.1 of the positioning chuck 2.

[0038] The adapter cover plate 1 is injection-molded, with diamond-shaped holes 3.1 and circular hole hollow structures inside, making the overall wall thickness uniform, the mold temperature transfer uniform, effectively reducing shrinkage deformation and also reducing the material consumption, thus reducing the mass of the adapter; this adapter is injection-molded with a special formula material, and the internal structure is a mixture of diamond-shaped hollow and the first test tube hole 8, featuring small deformation, stable dimensions, light weight, and good economy. Different manufacturers can customize the handle rod 4 according to the characteristics of their own production lines, making it more versatile.

[0039] Its positioning chuck 2 is integrally formed in one continuous process with a stainless steel spring sheet having good elastic modulus. The shape, size of its positioning claws, and the precision of the claw holes are precisely controlled and snapped into the circular groove 1.5 of the adapter cover plate 1. It mainly supports test tubes of different diameters through the claw head 2.6 or the claw middle 2.4 of the positioning chuck 2; the adapter cover plate 1 is injection-molded and fixed above the adapter base 3 through the interference fit between the positioning post 1.1 of the adapter cover plate 1 and the mating hole 3.2 of the adapter base 3, mainly used to fix the positioning chuck 2 and ensure that the positioning chucks 2 are arranged at a specified spacing.

[0040] Its handle rod 4 is fixed in the mounting hole 10 at the center of the upper surface of the adapter base 3. There are grid patterns in the middle for easy handling by personnel, mainly playing a connecting and supporting role; its hose 5 is a corrosion-resistant, oxidation-resistant, and moderately flexible integral hose 5, sleeved on the upper end of the handle rod 4, mainly playing a buffering role and avoiding hard contact with the manipulator, and at the same time avoiding the risk of cracking and falling off due to multiple clamping by the manipulator; its handle cap 6 is fixed above the handle rod 4, mainly playing a role in preventing the hose 5 from slipping and accidentally falling off after the manipulator loses power; its magnetic steel 7 is installed in the central hole at the lower part of the adapter base 3, mainly providing an identifying magnetic field and preventing the magnetic attraction effect of the adapter caused by the insertion and extraction of test tubes.

[0041] Please refer to Figure 4 , a process flow of a positioning chuck, which adopts a continuous forming process of one mold with four arcs; uses automatic sheet feeding, first cutting the fed material into the shape of the unfolded positioning chuck 2; then forming the folding V arc 2.5 and bending the claw head 2.6 and the claw middle 2.4; dividing the ring 2.1 into four symmetric arcs along the circumference and successively performing the forming treatment of the first symmetric arc, the second symmetric arc, the third symmetric arc, and the fourth symmetric arc; then finally forming the positioning chuck 2; and finally performing straightening treatment on the positioning chuck 2; all the above processes are completed on one mold, integrating the processes of cutting, stamping, forming, and straightening, and can continuously and uninterruptedly produce finished products.

[0042] The above are only the embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A positioning chuck, characterized in that: include: A circular ring (2.1), wherein the bottom of the circular ring (2.1) is formed with four positioning claws extending at equal distances; The portion of the positioning claw protruding from the circular ring (2.1) is formed with a claw root (2.3); after the positioning claw forms the claw root (2.3), it is bent obliquely toward the center of the circular ring (2.1) to form a claw center (2.4); after the positioning claw forms the claw center (2.4), it is bent toward the center to form a claw head (2.6); the lower end of the claw head (2.6) is tilted outwards; The circle formed by the claw head (2.6) is coaxial with the center of the ring (2.1); The outer sides of the claw center (2.4) and the claw head (2.6) are provided with a V-shaped arc (2.5); the top view cross-section of the claw center (2.4) and the claw head (2.6) is V-shaped.

2. A positioning chuck according to claim 1, characterized in that: The circular ring (2.1) and the positioning claws are both made of metal.

3. An adapter, characterized in that: It comprises a positioning chuck for installing any one of claims 1 to 2, as well as an adapter base (3) and an adapter cover (1); The adapter base (3) is provided with a first test tube hole (8) and a matching hole (3.2); the adapter cover (1) is provided with a second test tube hole (9) corresponding to the first test tube hole (8); and a positioning column (1.1) adapted to the matching hole (3.2) is fixedly connected to the bottom of the adapter cover (1).

4. An adapter according to claim 3, characterized in that: The top of the first test tube hole (8) is provided with a docking groove (3.6) for engaging with the circular ring (2.1) of the positioning chuck (2), and the bottom of the docking groove (3.6) is provided with an avoidance groove (3.5) for corresponding to the positioning claw.

5. An adapter according to claim 3, characterized in that: A circular groove (1.5) corresponding to the docking groove (3.6) is provided at the bottom edge of the second test tube hole (9) of the adapter cover (1), and a limiting platform (1.2) is provided on the inner wall side of the circular groove (1.5).

6. An adapter according to claim 5, characterized in that: The edge where the circular groove (1.5) overlaps with the second test tube hole (9) is fixedly connected downward with a convex lip (1.4).

7. An adapter according to claim 5, characterized in that: An upper notch (2.2) is provided on the circular ring (2.1) of the positioning chuck (2), and a radial platform (1.3) matching the upper notch (2.2) is provided inside the circular groove (1.5).

8. An adapter according to claim 3, characterized in that: An upper bottom arc (3.4) is provided at the bottom of the first test tube hole (8), and a lower bottom arc (3.3) is provided below the upper bottom arc (3.4).

9. An adapter according to claim 3, characterized in that: It also includes a handle bar (4), a hose (5) is sleeved on the handle bar (4), and a handle cap (6) is provided on the top of the handle bar (4); A mounting hole (10) for mounting the handle bar (4) is provided in the center of the adapter base (3) and the adapter cover (1), and a magnetic steel (7) is installed in the center of the bottom of the adapter base (3).

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