A sample tube holder device

Abstract

The application discloses a sample tube holder device, which comprises a bracket, a containing space for containing a sample tube arranged on the bracket, a supporting leg, one end of the supporting leg being hinged to the bracket, the other end of the supporting leg being used for abutting against the sample tube, two or more supporting legs being arranged in a ring array around the containing space, and an elastic ring being sleeved on all the supporting legs and driving all the supporting legs to move towards the center of the containing space. Compared with the prior art, the technical scheme disclosed by the application can simultaneously accommodate sample tubes of different sizes, can provide stable clamping force for the access of the sample tubes, can automatically center the sample tubes, and can improve the access efficiency and stability of the sample tubes.

Description

Technical Field

[0001] This application relates to the field of sample tube storage technology, and more specifically, to a sample tube holder device. Background Technology

[0002] With the rapid development of in vitro diagnostics in medicine, the number of specimens used for in vitro diagnostics in Chinese hospitals has also increased significantly. Automated production lines that replace manual labor with machines are currently the mainstream demand. As a result, various styles and specifications of sample tubes are also increasing, with tube diameters ranging from a few millimeters to tens of millimeters being the mainstream. It is obvious that tube holders with a single fixed diameter (sample tube) cannot meet the requirements.

[0003] To meet this requirement of multi-specification compatibility, the common practice adopted by various manufacturers is to install a varying number (usually 3 to 6) of spring plates or spring wires above the pipe bracket as an elastic body, achieving automatic centering positioning through the elasticity of the springs (see...). Figure 1 The original elastic tube holder has a small spring deformation when the sample tube diameter is small, and the small elastic force is not conducive to the automatic centering of the sample tube. When the sample tube diameter is large, the spring deformation is large, and the excessive elastic force is not conducive to the insertion of the sample tube into the tube holder. Therefore, the elastic tube holder with this method is generally compatible with a relatively small range of sample tube diameters (generally within 10mm).

[0004] Therefore, how to provide a sample tube holder that can be compatible with sample tubes of different sizes, provide a stable clamping force for sample tube storage and retrieval, achieve automatic centering of sample tubes, and improve the efficiency and stability of sample tube storage and retrieval has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a sample tube holder device that is compatible with sample tubes of different sizes, provides a stable clamping force for sample tube storage and retrieval, enables automatic centering of sample tubes, and improves the efficiency and stability of sample tube storage and retrieval.

[0006] The technical solution provided in this application is as follows:

[0007] A sample tube holder device includes: a bracket with a receiving space for accommodating sample tubes; legs, one end of which is hinged to the bracket and the other end of which abuts against the sample tube; two or more legs arranged in a circumferential array around the receiving space; and an elastic ring fitted over all the legs, which moves all the legs toward the center of the receiving space.

[0008] Furthermore, in a preferred embodiment of the present invention, the accommodating space includes an upper accommodating space and a lower accommodating space, the upper accommodating space being located above the lower accommodating space and communicating with the lower accommodating space.

[0009] Furthermore, in a preferred embodiment of the present invention, the horizontal cross-section of the upper accommodating space is larger than the horizontal cross-section of the lower accommodating space.

[0010] Furthermore, in a preferred embodiment of the present invention, the bottom of the lower receiving space is provided with a central inverted conical hole, which is used for centering and positioning with the bottom of the small sample tube.

[0011] Furthermore, in a preferred embodiment of the invention, the outrigger is hinged to the bracket hinge on the bracket via an outrigger hinge point.

[0012] Furthermore, in a preferred embodiment of the present invention, the support leg is provided with a support leg hook, which is used to restrict the movement of the elastic ring relative to the support leg.

[0013] Furthermore, in a preferred embodiment of the present invention, the leg hook 2.2 has a concave or convex structure; the number of leg hooks on a single leg is one; the number of elastic rings is the same as the number of leg hooks.

[0014] Furthermore, in a preferred embodiment of the present invention, the end of the support leg away from the bracket is provided with a curved surface, which is used to abut against the sample tube.

[0015] Furthermore, in a preferred embodiment of the present invention, the arcuate surface of the support leg is provided with raised edge structures on both sides along the length direction of the support leg, and the raised edge structures are used to abut against the tube wall of the sample tube.

[0016] Furthermore, in a preferred embodiment of the present invention, the elastic ring is one or more of an O-ring, a rubber band, or a spring ring.

[0017] Furthermore, in a preferred embodiment of the present invention, the elastic ring is made of silicone, rubber, or stainless steel spring steel.

[0018] Furthermore, in a preferred embodiment of the present invention, the support leg is made of plastic or metal.

[0019] Furthermore, in a preferred embodiment of the present invention, the number of legs is 2-30.

[0020] Furthermore, in a preferred embodiment of the present invention, a first magnetic part is provided at the end of the support leg away from the bracket; a second magnetic part is provided on the bracket; the second magnetic part and the first magnetic part are at the same horizontal height; the second magnetic part and the first magnetic part are in a state of like poles repulsion.

[0021] Furthermore, in a preferred embodiment of the present invention, the device includes: a third magnetic part arranged in a ring array on the outside of the sample tube, the number of the third magnetic parts being the same as the number of the support legs; the third magnetic parts and the first magnetic parts being in a state of like poles repulsion.

[0022] Compared with the prior art, the present invention provides a technical solution for a sample tube holder device. In this technical solution, multiple legs are hinged to the holder, with one end of each leg hinged to the holder and the other end pressed against the sample tube. Under the action of an elastic ring, the legs move towards the central axis, thereby clamping the sample tube after it is placed in. Since the force exerted by the legs on the sample tube is provided by the same elastic ring, the forces exerted by the multiple legs on the sample tube remain balanced as the sample tube is centered, thus achieving stable clamping of the sample tube. Furthermore, if the sample tube is tilted during placement, the forces exerted by the legs on the sample tube will be inconsistent, with the leg exerting the greater force pushing the sample tube to the center of the holder, thereby achieving automatic centering of the sample tube. Furthermore, in this solution, the elastic restoring force of the support legs is provided by the elastic ring. Under the action of the sample tube, the support legs expand outward, enlarging the elastic ring, and the elastic ring generates a reaction force on the support legs. The deformation of the elastic ring is within its maximum elastic deformation range, thus ensuring that the clamping force of the support legs on the sample tube is consistent regardless of the sample tube size, facilitating the storage and retrieval of the sample tube. The technical solution provided in this application is compatible with both large and small sample tubes, provides a stable clamping force for the storage and retrieval of sample tubes, enables automatic centering of the sample tube, and improves the storage and retrieval efficiency and stability of the sample tube.

[0023] It should be further noted that, compared with the prior art, this application has the following advantages:

[0024] First, it can be compatible with sample tubes with larger diameter differences, thus enhancing the adaptability of sample tubes;

[0025] Secondly, it can be compatible with sample tubes with greater height differences, thus enhancing the adaptability of the sample tubes;

[0026] Third, it is compatible with sample tubes with curved bottoms, which enhances the adaptability of the sample tubes;

[0027] Fourth, the small elastic deformation means that the resistance experienced by the sample tube when it is placed is not significantly different, which ensures a good centering effect.

[0028] Fifth, the structure has good guiding principle, there is no phenomenon of elastic body bending, and the service life is long. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of placing a small sample tube into a single-layer sample tube holder device provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the existing technical solution structure;

[0032] Figure 3 A top view of the single-layer sample tube holder device provided in an embodiment of the present invention, showing the placement of a small sample tube;

[0033] Figure 4 A schematic diagram of placing a large sample tube into a single-layer sample tube holder device provided in an embodiment of the present invention;

[0034] Figure 5 A top view of a single-layer sample tube holder device provided in an embodiment of the present invention for placing a large sample tube;

[0035] Figure 6 A schematic diagram of placing a small sample tube into the multi-layer sample tube holder device provided in an embodiment of the present invention;

[0036] Figure 7 A top view of the multi-layer sample tube holder device provided in an embodiment of the present invention for inserting small sample tubes;

[0037] Figure 8 A schematic diagram of placing a large sample tube into the multi-layer sample tube holder device provided in an embodiment of the present invention;

[0038] Figure 9 A top view of the multi-layer sample tube holder device provided in an embodiment of the present invention for placing a large sample tube;

[0039] Figure 10 This is a schematic diagram of the support leg provided in an embodiment of the present invention;

[0040] Figure 11 A schematic diagram of the structure of the first magnetic part, the second magnetic part, and the third magnetic part provided in an embodiment of the present invention;

[0041] Figure 12A schematic diagram of the bracket structure of the multi-layer sample tube support device provided in an embodiment of the present invention;

[0042] Figure 13 A three-dimensional structural diagram of the support leg provided in an embodiment of the present invention;

[0043] Figure 14 This is a schematic diagram of the protruding edge structure provided in an embodiment of the present invention;

[0044] Figure 15 A three-dimensional schematic diagram of inserting a small sample tube into the multi-layer sample tube holder device provided in an embodiment of the present invention;

[0045] Figure 16 A cross-sectional view of a multi-layer sample tube holder device for inserting a small sample tube according to an embodiment of the present invention;

[0046] Figure 17 A three-dimensional schematic diagram of inserting a large sample tube into a multi-layer sample tube holder device provided in an embodiment of the present invention;

[0047] Figure 18 A cross-sectional view of a multi-layer sample tube holder device provided in an embodiment of the present invention, showing the insertion of a large sample tube.

[0048] Figure label:

[0049] Bracket 1; Bracket hinge point 1.1; Upper accommodating space 1.2; Lower accommodating space 1.3; Central inverted conical hole 1.4; Support leg 2; Support leg hinge point 2.1; Support leg hook 2.2; Support leg arc surface 2.3; Protruding edge structure 2.4; Elastic ring 3; Sample tube 4; First magnetic part 5.1; Second magnetic part 5.2; Third magnetic part 5.3; Spring piece 6. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0052] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "first", "second", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0054] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0055] like Figures 1 to 18 As shown in the embodiment of this application, the sample tube holder device includes: a bracket 1 with a receiving space for accommodating sample tubes; a support leg 2, one end of which is hinged to the bracket 1 and the other end of which is used to abut against the sample tube 4; two or more support legs 2 arranged in a ring around the receiving space; and an elastic ring 3 fitted onto all the support legs 2, which drives all the support legs 2 to move towards the center of the receiving space.

[0056] Compared with the prior art, the present invention provides a technical solution for a sample tube holder device. In this technical solution, multiple legs are hinged to the holder, with one end of each leg hinged to the holder and the other end pressed against the sample tube. Under the action of an elastic ring, the legs move towards the central axis, thereby clamping the sample tube after it is placed in. Since the force exerted by the legs on the sample tube is provided by the same elastic ring, the forces exerted by the multiple legs on the sample tube remain balanced as the sample tube is centered, thus achieving stable clamping of the sample tube. Furthermore, if the sample tube is tilted during placement, the forces exerted by the legs on the sample tube will be inconsistent, with the leg exerting the greater force pushing the sample tube to the center of the holder, thereby achieving automatic centering of the sample tube. Furthermore, in this solution, the elastic restoring force of the support legs is provided by the elastic ring. Under the action of the sample tube, the support legs expand outward, enlarging the elastic ring, and the elastic ring generates a reaction force on the support legs. The deformation of the elastic ring is within its maximum elastic deformation range, thus ensuring that the clamping force of the support legs on the sample tube is consistent regardless of the sample tube size, facilitating the storage and retrieval of the sample tube. The technical solution provided in this application is compatible with both large and small sample tubes, provides a stable clamping force for the storage and retrieval of sample tubes, enables automatic centering of the sample tube, and improves the storage and retrieval efficiency and stability of the sample tube.

[0057] Specifically, in a specific embodiment of the present invention, the accommodating space includes an upper accommodating space 1.2 and a lower accommodating space 1.3. The upper accommodating space 1.2 is located above the lower accommodating space 1.3, and the upper accommodating space 1.2 is connected to the lower accommodating space 1.3.

[0058] It should be noted that the design of the upper and lower storage spaces on the bracket enables the targeted storage and fixation of large and small sample tubes.

[0059] Specifically, in a specific embodiment of the present invention, the horizontal cross-section of the upper accommodating space 1.2 is larger than the horizontal cross-section of the lower accommodating space 1.3.

[0060] Specifically, in a specific embodiment of the present invention, the bottom of the lower accommodating space 1.3 is provided with a central inverted conical hole 1.4, which is used to align and position with the bottom of the small sample tube.

[0061] It should be noted that the central inverted conical hole can center and position the bottom of the small sample tube, preventing the bottom of the small sample tube from shifting.

[0062] Specifically, in a specific embodiment of the present invention, the support leg 2 is hinged to the bracket hinge point 1.1 on the bracket 1 via the support leg hinge point 2.1.

[0063] Specifically, in a specific embodiment of the present invention, a leg hook 2.2 is provided on the leg 2, and the leg hook 2.2 is used to restrict the movement of the elastic ring 3 relative to the leg 2.

[0064] Specifically, in a specific embodiment of the present invention, the leg hook 2.2 has a concave or convex structure; the number of leg hooks 2.2 on a single leg 2 is 1-10; the number of elastic rings 3 is the same as the number of leg hooks 2.2.

[0065] It should be noted that the outrigger hook structure simplifies the fixing method of the elastic ring and improves the installation efficiency of the elastic ring.

[0066] Specifically, in a specific embodiment of the present invention, the support leg 2 is provided with a support leg arc surface 2.3 at the end away from the bracket 1, and the support leg arc surface 2.3 is used to abut against the sample tube 4.

[0067] It should be noted that the curved surface of the support legs can improve the stability of sample tube storage and retrieval.

[0068] Specifically, in a specific embodiment of the present invention, the arc-shaped surface 2.3 of the support leg is provided with raised edge structures 2.4 on both sides along the length direction of the support leg 2, and the raised edge structures 2.4 are used to abut against the tube wall of the sample tube 4.

[0069] Specifically, in a specific embodiment of the present invention, the elastic ring 3 is one or more of an O-ring, a rubber band, or a spring ring.

[0070] Specifically, in a specific embodiment of the present invention, the elastic ring 3 is an elastic ring made of silicone, rubber or stainless steel spring steel.

[0071] Specifically, in a specific embodiment of the present invention, the support leg 2 is a support leg made of plastic or metal.

[0072] Specifically, in a specific embodiment of the present invention, the number of the support legs 2 is 2-30.

[0073] Specifically, in a specific embodiment of the present invention, a first magnetic part 5.1 is provided at the end of the support leg 2 away from the bracket 1; a second magnetic part 5.2 is provided on the bracket 1; the second magnetic part 5.2 and the first magnetic part 5.1 are at the same horizontal height; the second magnetic part 5.2 and the first magnetic part 5.1 are in a state of like poles repulsion.

[0074] It should be noted that while the elastic ring can provide a relatively constant clamping force for the legs of the sample tube, the sample mass contained in a large sample tube will be much greater than that in a small sample tube; that is, the clamping force required by the legs to maintain stability for a large sample tube will be greater than that required for a small sample tube.

[0075] By setting the first and second magnetic parts to a state of repulsion between their like poles, the magnetic repulsion between them can be triggered when a large sample tube is inserted, increasing the clamping force of the legs on the sample tube. Simultaneously, as the size of the sample tube increases, the repulsive magnetic force between the first and second magnetic parts becomes stronger, resulting in a greater clamping force from the legs and a more secure grip on the large sample tube.

[0076] Specifically, in a specific embodiment of the present invention, the device includes: a third magnetic part 5.3 arranged in a ring array on the outside of the sample tube 4, the number of the third magnetic parts 5.3 being the same as the number of the support legs 2; the third magnetic parts 5.3 and the first magnetic parts 5.1 being in a state of like poles repulsion.

[0077] It should be noted that, through the cooperation of multiple third magnetic parts and the first magnetic part, the reaction force of the first magnetic part on the third magnetic part can buffer the insertion of the sample tube during the sample tube insertion process. Furthermore, due to the repulsion between the first and third magnetic parts, the sample tube has a gear meshing effect during insertion, thereby circumferentially positioning the sample tube and preventing it from rotating. Furthermore, the legs exert a certain frictional force on the sample tube, creating some resistance when directly removing it. Under the repulsive magnetic action of the first and third magnetic parts, rotating the sample tube during removal allows the legs to be arranged in a spiral shape, reducing the force exerted by the legs on the sample tube and thus reducing the resistance during removal, facilitating sample tube removal. Finally, due to the repulsive force between the first and third magnetic parts, the sample tube experiences an upward force when picked up, making it easy to pick up and convenient for use. It should be added that the repulsive effect between the third magnetic part and the first magnetic part improves the convenience and functionality of the sample tube in the three processes of insertion, storage and retrieval.

[0078] It should be noted that the existing technology (see...) Figure 1The defects or shortcomings of the original elastic tube holder: Using spring sheets or spring steel wires as the elastic body (spring sheet 6), automatic centering is achieved through the elasticity of the spring. The main drawback of this type of elastic tube holder is that when the sample tube diameter is small, the elastic deformation of the spring sheet or spring steel wire is small, resulting in insufficient elastic force and inability to play a centering role; while when the sample tube diameter is large, the elastic deformation of the spring sheet or spring steel wire is large, resulting in excessive elastic force, causing excessive resistance when inserting the sample tube, and even scratching the label on the sample tube wall. Therefore, this type of elastic tube holder is only suitable for occasions where the diameter range of the sample tubes is relatively small (generally within 10mm) and the height difference of the sample tubes is also relatively small.

[0079] It should be noted that this technology provides a sample tube holder device that is compatible with multiple sample tube sizes. The holder is a circular container larger than the largest tube diameter to be compatible, and is divided into upper and lower layers. The upper layer is used to place larger sample tubes, and the lower layer is used to place smaller sample tubes. It can also adapt well to sample tubes with rounded bottoms. Several tube support hinge points 1.1 are evenly distributed around the upper circumference of the bracket 1. Support hinge points 2.1 are set on the upper part of the support leg 2, which together with the bracket hinge points 1.1 form a movable hinge, allowing the support leg 2 to swing within a certain angle range around the bracket hinge points 1.1. Support hooks 2.2 are set at the upper part of the support leg 2. An elastic ring 3 is wrapped around all the support hooks 2.2. Under the elastic force of the elastic ring 3, the support leg 2 retracts towards the center of the bracket 1, so that the arc surface 2.3 of the support leg is in close contact with the sample tube 4 and points towards the center. Because several support legs 2 are evenly distributed around the circumference, they eventually reach mutual balance at the center position of the bracket 1 under their interaction force, thereby achieving the purpose of centering the sample tube 4.

[0080] One or more elastic rings can be inserted individually depending on the specific condition of the sample tube to achieve the best effect of elasticity and centering.

[0081] The bracket 1 of this design is divided into upper and lower layers, which is more compatible with slender tubes and sample tubes with rounded bottoms, and has a wider range of applications. Two support hooks are set in sections on the support legs 2, and elastic rings 3 with different elasticity can be placed to achieve the best centering effect on the sample tube 4 with the appropriate elasticity.

[0082] It should be added that: First, bracket 1: plays a supporting role in the entire structure. The inner cavity of the bracket can be circular, square, or polygonal, and the material is plastic or metal. Second, support legs 2: play a guiding, centering, and clamping role in the entire structure. The number can vary from 2 to 30, with 6 shown in the illustration. They have different shapes and are made of plastic or metal. The support legs 2 are hinged to the tube hinge point 1, and the support legs 2 can swing within a certain angle range. Third, elastic ring 3: the elastic ring 3 is fitted into the position of the support leg hook 2.2 and applies an inward elastic force. Under the leverage of the force, all the support legs 2 retract inward to form a centripetal clamping effect on the sample tube 4. The elastic ring 3 can be in the form of O-rings, rubber bands, spring rings, etc., and the material can be silicone, rubber, stainless steel, spring steel, etc.

[0083] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sample tube holder device, characterized by, The device comprises: a bracket (1) provided with a containing space for accommodating sample tubes; a support leg (2) hinged at one end to the bracket (1) and provided at the other end with a leg arc surface (2.3) for abutting against a sample tube (4); two or more support legs (2) arranged in a ring array around the containing space; an elastic ring (3) fitted on all the support legs (2) and driving all the support legs (2) to move towards the center of the containing space; the containing space comprises an upper containing space (1.2) and a lower containing space (1.3), the upper containing space (1.2) is located above the lower containing space (1.3), the upper containing space (1.2) is in communication with the lower containing space (1.3), the horizontal cross-section of the upper containing space (1.2) is larger than that of the lower containing space (1.3); and / or 2. The sample tube holder apparatus of claim 1, wherein, the bottom of the lower containing space (1.3) is provided with a central inverted taper hole (1.4) for centering and positioning with the bottom of a small sample tube, the end of the support leg (2) away from the bracket (1) is provided with a leg arc surface (2.3) for abutting against a sample tube (4), the end of the support leg (2) away from the bracket (1) is provided with a first magnetic part (5.1), the bracket (1) is provided with a second magnetic part (5.2), the horizontal height of the second magnetic part (5.2) is consistent with that of the first magnetic part (5.1), the second magnetic part (5.2) and the first magnetic part (5.1) are in a same-pole repulsion state, the support leg (2) is hinged to the bracket (1) through a leg hinge point (2.1) and a bracket hinge point (1.1), the support leg (2) is provided with a leg hook (2.2) for limiting the movement of the elastic ring (3) relative to the support leg (2), the device comprises a third magnetic part (5.3) arranged in a ring array outside the sample tube (4), the number of the third magnetic part (5.3) is consistent with that of the support leg (2), and the third magnetic part (5.3) and the first magnetic part (5.1) are in a same-pole repulsion state. The leg hook (2.2) is a concave structure or a convex structure; The number of the leg hook (2.2) on a single support leg (2) is 1-10; 3. The sample tube receptacle device of claim 2, wherein, The number of the elastic ring (3) is consistent with that of the leg hook (2.2).

4. The sample tube receptacle apparatus of claim 3, wherein, The leg arc surface (2.3) is provided on both sides along the length direction of the support leg (2) with a raised edge structure (2.4) for abutting against the wall of a sample tube (4). The elastic ring (3) is one or more of an O-shaped rubber ring, a rubber band or a spring ring; or 5. The sample tube receptacle apparatus of claim 4, wherein, The elastic ring (3) is made of silicone, rubber or stainless steel spring steel material. The support leg (2) is made of plastic or metal; and / or The number of the legs (2) is 2-30.

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