CN215917455U - Tube cover for centrifugal tube and centrifugal tube kit - Google Patents

Abstract

The application provides a tube cap and centrifuging tube external member for centrifuging tube, the tube cap includes: a rotating ring; the rotating piece is connected with the rotating ring and can rotate along with the rotating ring, and a first arc-shaped part is arranged on the rotating piece; the matching sheet is arranged at the lower part of the rotating sheet, a second arc-shaped part is arranged on the matching sheet, the arc-shaped opening direction of the second arc-shaped part is opposite to the arc-shaped opening direction of the first arc-shaped part, and at least one of the first arc-shaped part and the second arc-shaped part is provided with an elastic piece; wherein the rotating piece and the matching piece are shaped and dimensioned so that the rotating piece can rotate relative to the matching piece between a first rotating position and a second rotating position, the first arc-shaped part and the second arc-shaped part enclose a first cavity in the first rotating position, and the second arc-shaped part is closed by the rotating piece in the second rotating position. Centrifuge tube kit includes centrifuging tube and above-mentioned tube cap, and wherein the centrifuging tube includes the open end, and the tube cap is used for sealing the open end.

Description

Tube cover for centrifugal tube and centrifugal tube kit

Technical Field

The application relates to the technical field of biological detection, especially, relate to a tube cap and centrifuging tube external member for centrifuging tube.

Background

In recent years, with the development of biomedical technologies, technologies such as Polymerase Chain Reaction (PCR) have become common technical means for nucleic acid detection and DNA analysis research of biological samples, however, due to the high sensitivity and specificity of technologies such as PCR, false positive results often occur. The reasons for false positive are cross contamination between samples, reagent contamination, amplification product contamination, aerosol contamination, cloned plasmid contamination, etc. The aerosol pollution is common and serious, the aerosol pollution is generally caused by open operation (air and test liquid sample friction is generated), and like operation such as violent shaking of a centrifugal tube during test operation and liquid splashing during uncovering of an experiment personnel, the pollution of a laboratory area is caused, and an experiment result is influenced.

At present, the tube cap of the existing centrifuge tube is generally a disposable gland or a screw cap. When the liquid sample is removed, the tube cover of the centrifugal tube needs to be opened in the air for a long time, so that the liquid sample is exposed in the air, or when the liquid sample is repeatedly blown and sucked by using a liquid transfer device or is operated by other equipment, aerosol pollution of the liquid sample in the centrifugal tube is easily caused, and the detection result is influenced.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. To this end, an object of the present application is to provide a tube cap for a centrifuge tube and a centrifuge tube to prevent the above aerosol contamination, especially when removing a liquid sample.

Embodiments of a first aspect of the present application provide a tube cap for a centrifuge tube, comprising: a rotating ring; the rotating piece is connected with the rotating ring and can rotate along with the rotating ring, and a first arc-shaped part is arranged on the rotating piece; the matching sheet is arranged at the lower part of the rotating sheet, a second arc-shaped part is arranged on the matching sheet, the arc-shaped opening direction of the second arc-shaped part is opposite to the arc-shaped opening direction of the first arc-shaped part, and at least one of the first arc-shaped part and the second arc-shaped part is provided with an elastic piece; wherein the rotating piece and the matching piece are shaped and dimensioned so that the rotating piece can rotate relative to the matching piece between a first rotating position and a second rotating position, the first arc-shaped part and the second arc-shaped part enclose a first cavity in the first rotating position, and the second arc-shaped part is closed by the rotating piece in the second rotating position.

According to the tube cap for centrifuging tube of above-mentioned embodiment of this application, still include joint portion, joint portion sets up in the lower part of cooperation piece to joint portion is provided with the second cavity, and wherein, the projection of first cavity on the second cavity along the rotation axis of revolving fragment is located within the second cavity.

According to the tube cap for centrifuging tube of the above-mentioned embodiment of this application, wherein, the inner wall that rotates the ring is provided with the guide way, and the periphery of cooperation piece is provided with the bulge that can move in the guide way, and the guide way includes at least: a first section; and a second section closer to the rotary piece relative to the first section such that the mating piece abuts the rotary piece when the projection is located in the second section.

The tube cover for a centrifuge tube according to the above-described embodiments of the present application, wherein the second section includes a catch for receiving the projection to prevent the projection from moving within the guide slot in the absence of an external force applied to the rotating ring.

According to the tube cover for the centrifugal tube of the embodiment of the application, the center position of the rotating sheet is provided with a hole, and the center position of the matching sheet is provided with a shaft accommodated in the hole; or the central position of the rotating sheet is provided with a shaft, and the central position of the matching sheet is provided with a hole for accommodating the shaft.

According to the tube cover for a centrifuge tube of the above embodiment of the present application, at least one of the first arc-shaped part and the second arc-shaped part is provided with an elastic member.

According to the tube cover for the centrifugal tube in the above embodiment of the present application, the material of the elastic member is rubber or silicon rubber.

According to the tube cover for a centrifugal tube of the above embodiment of the present application, the diameter of the first arc-shaped part is equal to the diameter of the second arc-shaped part, and the chord length of the first arc-shaped part is equal to the chord length of the second arc-shaped part.

According to the tube cover for a centrifuge tube of the above embodiment of the present application, a central angle of the first arc-shaped portion and a central angle of the second arc-shaped portion are greater than or equal to 150 degrees and less than or equal to 240 degrees.

According to the tube cap for centrifuge tube of the above-mentioned embodiment of this application, wherein, the central angle of first arc portion and the central angle of second arc portion are 180 degrees.

According to the tube cap for centrifuge tube of the above-mentioned embodiment of this application, wherein, joint portion is the snap ring, and the second cavity is circular.

According to the tube cover for a centrifugal tube of the above embodiment of the present application, a chord length of the first arc-shaped part is smaller than or equal to an inner peripheral radius of the second cavity, and a chord length of the second arc-shaped part is smaller than or equal to the inner peripheral radius of the second cavity.

According to the tube cover for a centrifugal tube of the above embodiment of the present application, wherein the outer circumference of the rotating ring is provided with the friction portion.

According to the tube cap for centrifuging tube of the above-mentioned embodiment of this application, wherein, the tube cap is provided with the connecting band that can buckle, and the one end that the tube cap was kept away from to the connecting band is provided with the lantern ring.

Embodiments of a second aspect of the present application provide a centrifuge tube kit comprising a centrifuge tube comprising an open end; according to the tube cover of the above embodiment, the tube cover is used for closing the opening end.

The utility model provides a tube cap and centrifuging tube external member for centrifuging tube, through set up the revolving fragment that includes first arc portion and the cooperation piece that includes second arc portion on the tube cap to and the revolving fragment can be for cooperation piece rotary motion between first rotational position and second rotational position, at first rotational position, first arc portion encloses synthetic first cavity with second arc portion, at second rotational position, second arc portion is sealed by the revolving fragment. When pipetting or other manipulation of the liquid sample is desired, the spinning blade is rotated to a first rotational position, and a pipette or other device for manipulating the liquid sample can be inserted into the centrifuge tube through the first cavity in a substantially fluid-tight manner for pipetting or other manipulation, whereby air or other contaminants can be prevented from coming into contact with the liquid sample; when the liquid removing or other operations are not needed, the rotating piece is rotated to the second rotating position, the second arc-shaped part is closed, air or other pollutants can be prevented from contacting with the liquid sample, the liquid sample in the centrifugal tube is prevented from being polluted, and the detection accuracy is improved.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

FIG. 1 shows an exploded view of a tube cover according to an embodiment of the present application;

FIG. 2 shows a top view of the tube cover with the rotary blade moved to a first rotational position according to the above embodiments;

FIG. 3 shows a top view of the tube cover with the rotary blade moved to a second rotational position according to the above embodiments;

fig. 4 shows a cross-sectional view of a tube cap according to the above embodiment;

FIG. 5 shows a top view of the tube cover with the rotary plate moved to a position according to the above embodiment;

fig. 6 shows a front view of a centrifuge tube kit according to an embodiment of the present application.

Description of reference numerals:

10: the tube cover 20: centrifugal tube set

100: the rotating ring 110: guide groove

111: first section 112: second section

113: card slot 120: friction part

200: the rotating sheet 210: a first arc part

210A, 210B: two ends 220 of the first arc: hole(s)

300: the mating tab 310: second arc part

310A, 310B: two ends 320 of the second arc: shaft

330: the convex portion 400: clamping part

410: second cavity 500: a first cavity

600: connecting the band 610: lantern ring

800: centrifuging the tube 810: open end

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

As described above, in the related art, a centrifugal tube and a tube cap are generally used in a kit. The centrifuge tube contains a liquid sample, and the tube cap of the centrifuge tube is generally a disposable gland or a screw cap. When a liquid sample is removed or subjected to other operations, due to the lack of corresponding sealing measures, the liquid sample is easily exposed to air or other pollutants, so that the liquid sample in the centrifuge tube is polluted, and the detection result of the liquid sample is influenced.

In order to solve or alleviate at least one of above-mentioned problem, this application embodiment provides a tube cap and centrifuging tube for centrifuging tube, through set up the revolving fragment that includes first arc portion and the cooperation piece that includes second arc portion on the tube cap, can adjust the revolving fragment rotation during rotatory ring to adjust the cavity size between first arc portion and the second arc portion. Can adjust the cavity size to just make the pipettor or be used for operating other equipment of liquid sample insert the centrifuging tube when need move and get liquid, need not move and get liquid sample or can rotate rotatory ring to tube cap airtight when carrying out other operations to the liquid sample to prevent that the liquid sample from exposing in the air, avoid aerosol pollution.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiment of the application provides a tube cap, and this tube cap can use with the cooperation of centrifuging tube.

Fig. 1 shows an exploded view of a tube cap 10 according to an embodiment of the present application; FIG. 2 illustrates a top view of the tube cap 10 with the rotary tab 200 moved to a first rotational position according to one embodiment of the present application; FIG. 3 illustrates a top view of the tube cap 10 with the rotary tab 200 moved to a second rotational position according to one embodiment of the present application; fig. 4 shows a cross-sectional view of a tube cap 10 according to an embodiment of the present application.

As shown in fig. 1 to 4, the cap 10 includes: the spin ring 100, the spin ring 200, and the coupling plate 300, the spin ring 200 and the coupling plate 300 may be thin plates, wherein the spin ring 200 is coupled to the spin ring 100, and the spin ring 200 can rotate together with the spin ring 100 when the spin ring 100 is rotated. The coupling piece 300 is disposed at a lower portion of the rotary piece 200. The rotating plate 200 is provided with a first arc-shaped portion 210, the engaging plate 300 is provided with a second arc-shaped portion 310, and the arc opening direction of the second arc-shaped portion 310 is opposite to the arc opening direction of the first arc-shaped portion 210, i.e. the first arc-shaped portion 210 and the second arc-shaped portion 310 face each other.

In some embodiments, at least one of the first arc-shaped portion 210 and the second arc-shaped portion 310 is provided with an elastic member. Through set up the elastic component on arc portion, increase the elasticity of the inner periphery of first cavity 500, can adapt to the pipettor of multiple diameter or operate other equipment of the liquid sample in the centrifuging tube 800, wrap up the pipettor better or operate other equipment of the liquid sample in the centrifuging tube 800, realize the airtight in centrifuging tube 800 space. In addition, the elastic member can achieve good sealing even if the pipette or the other device is relatively displaced or rotated with respect to the centrifuge tube 800 when the liquid sample in the centrifuge tube 800 is manipulated by the pipette or the other device.

Referring to fig. 2 and 3, the rotary plate 200 and the mating plate 300 are shaped and dimensioned to enable rotational movement of the rotary plate 200 relative to the mating plate 300 between a first rotational position (fig. 2) and a second rotational position (fig. 3).

As shown in fig. 2, when it is desired to remove a liquid sample or perform other operations on a liquid sample by a pipette or other device (not shown) to the centrifuge tube 800 (see fig. 6), the rotating ring 100 can be rotated to rotate the rotating plate 200, so that the rotating plate 200 is at a first rotating position relative to the fitting plate 300, and the first arc-shaped portion 210 and the second arc-shaped portion 310 enclose the first cavity 500, so that the pipette or other device can pass through the first cavity without any gap to perform pipetting or perform other operations on the liquid sample, and contact between the liquid sample and air or other contaminants can be avoided.

As shown in fig. 3, after the liquid sample is removed or other operations are performed on the liquid sample, the rotating ring 100 can be rotated to drive the rotating plate 200 to rotate, so that the rotating plate 200 is at the second rotating position relative to the fitting plate 300, the second arc portion 310 is closed by the rotating plate 200, the tube cover 10 can seal the liquid sample in the centrifuge tube 800, and further prevent the liquid sample from contacting with air or other contaminants, and prevent the liquid sample from splashing or leaking during the process of moving or operating the centrifuge tube 800.

With continued reference to fig. 1, in some embodiments, the center position of the rotary plate 200 is provided with a hole 220, and the center position of the engaging plate 300 is provided with a shaft 320 received in the hole 220, whereby the rotary plate 200 and the engaging plate 300 can rotate relative to each other about the same rotational axis.

Alternatively, the center position of the rotary plate 200 is provided with a shaft, and the center position of the coupling plate 300 is provided with a hole for receiving the shaft 320, whereby the rotary plate 200 and the coupling plate 300 can be rotated relative to each other about the same rotation axis.

With continued reference to fig. 1, in some embodiments, the tube cover 10 further includes a snap-in portion 400, the snap-in portion 400 is disposed at a lower portion of the mating piece 300, and the snap-in portion 400 is provided with a second cavity 410. In some embodiments, the clamping portion 400 may be fixedly connected with the mating sheet 300 by means of integral molding or the like, or may be provided as a separate component at a lower portion of the mating sheet 300 by means of bonding or the like. Accordingly, the tube cover 10 can be snapped into the centrifuge tube 800 (see fig. 6) by the snap-in portion 400.

With continued reference to fig. 2, the projection of the first cavity 500 onto the second cavity 410 along the rotation axis of the rotation piece 200 is located within the second cavity 410, i.e. said first cavity 500 is only defined by the rotation piece 200 and the mating piece 300, and is not affected by the snap-in part 400. When a pipette or other device for manipulating a liquid sample in centrifuge tube 800 is inserted into centrifuge tube 800 through first cavity 500 (fig. 2) of tube cap 10, clip 400 can be avoided from interfering with the movement of the pipette or other device for manipulating a liquid sample in centrifuge tube 800. Furthermore, since the end of a pipette or other device for handling liquid samples in the centrifuge tube 800 for insertion into the centrifuge tube 800 typically has a circular cross section, by providing the first cavity 500 to be defined only by the rotation piece 200 and the mating piece 300, the influence of the snap 400 can be avoided without forming a circular or approximately circular first cavity 500, so that sealing can be better achieved.

With continued reference to FIG. 1, in some embodiments, the inner wall of the rotating ring 100 is provided with the guide slots 110, and the outer periphery of the mating tabs 300 is provided with the projections 330 that are capable of moving in the guide slots 110. Wherein the guide slot 110 comprises at least a first section 111 (e.g., when the protrusion 330 is located in the first section 111, the position of the rotary piece 200 may correspond to the first rotational position shown in fig. 2) and a second section 112 (e.g., when the protrusion 330 is located in the second section 112, the position of the rotary piece 200 may correspond to the second rotational position shown in fig. 3), the second section 112 being closer to the rotary piece 200 relative to the first section 111 such that the mating piece 300 abuts the rotary piece 200 when the protrusion 330 is located in the second section 112.

In some embodiments, the first section 111 may be a helically ascending guide slot and the second section 112 may be a horizontal section, wherein the second section 112 is closer to the rotating plate 200.

In other embodiments, the first section 111 and the second section 112 may be horizontal sections, and the end of the first section 111 is connected with the beginning of the second section 112 by a guide groove that spirals upward, so that the second section 112 is closer to the rotary plate 200.

Since the second section 112 is closer to the rotary piece 200 in the vertical direction with respect to the first section 111, the position of the engagement piece 300 in the vertical direction is changed when the projection 330 moves in the guide groove 110. When the protrusion 330 is located at the first section 111, the coupling piece 300 is away from the rotary piece 200 in the vertical direction; when the projections 330 are located in the second section 112, the mating tabs 300 abut/press against the rotating plate 200 in the vertical direction, achieving a better seal in the vertical direction, avoiding contact of the liquid in the centrifuge tube 800 with air or other contaminants, while avoiding splashing or leakage of the liquid sample during movement or handling of the centrifuge tube 800.

In some embodiments, the second section 112 includes a catch 113 for receiving the tab 330 to prevent the tab 330 from moving within the guide slot 110 in the absence of an external force being applied to the rotary ring 100. In some embodiments, the locking groove 113 is located at the end of the second section 112, and after the rotating ring 100 is rotated to move the protrusion 330 into the locking groove 113 at the end of the second section 112, the locking groove 113 can block the movement of the protrusion 330, so as to prevent the engaging piece 300 and the rotating piece 200 from moving or operating the centrifuge tube 800 relative to each other, thereby changing the tube cover 10 from the sealed state (fig. 3) to the unsealed state (fig. 2).

In some embodiments, the material of the elastic member may be any material having elasticity to facilitate sealing, such as rubber, silicone rubber, or a sealant.

In some embodiments, the diameter of the first arc 210 is equal to the diameter of the second arc 310, and the chord length of the first arc 210 is equal to the chord length of the second arc 310. As shown in fig. 5, 210A is an end point of the first arc-shaped portion 210 close to the rotation axis, 210B is an end point of the first arc-shaped portion 210 away from the rotation axis, 310A is an end point of the second arc-shaped portion 310 close to the rotation axis, and 310B is an end point of the second arc-shaped portion 310 away from the rotation axis. In some embodiments, in the first rotational position shown in FIG. 2, the two ends 210A, 210B of the first arc 210 substantially coincide with the two ends 310A, 310B of the second arc 310, respectively. It should be understood that while figure 2 shows a preferred embodiment of the first rotational position, in other embodiments, the two ends 210A, 210B of the first arc 210 and the two ends 310A, 310B of the second arc 310 may not coincide in the first rotational position.

For the first arc-shaped portion 210 and the second arc-shaped portion 310, in some embodiments, the following features may also be provided: the central angle of the first arc-shaped portion 210 and the central angle of the second arc-shaped portion 310 are greater than or equal to 150 degrees and less than or equal to 240 degrees. At this time, the first arc-shaped portion 210 and the second arc-shaped portion 310 enclose the first cavity 500 to be more circular, and since the horizontal cross section of the insertion end of the pipette or other equipment for operating the centrifuge tube 800 is also circular, the first cavity 500 more easily and hermetically wraps the insertion end of the pipette or other equipment.

For the first arc-shaped portion 210 and the second arc-shaped portion 310, in some embodiments, the following features may also be provided: the central angle of the first arc-shaped part 210 and the central angle of the second arc-shaped part 310 are both 180 degrees. At this time, the first cavity 500 enclosed by the first arc-shaped portion 210 and the second arc-shaped portion 310 is a perfect circle, and since the horizontal section of the insertion end of the pipette or other equipment used for operating the centrifuge tube 800 is also a circle, the first cavity 500 more easily and hermetically wraps the insertion end of the pipette or other equipment.

In some embodiments, the snap-fit portion 400 is a snap ring and the second cavity 410 is circular. Fig. 5 illustrates a top view of the tube cap 10 when the rotary blade 200 according to an embodiment of the present application is moved to a certain position. Since the projection of the first cavity 500 on the second cavity 410 along the rotation axis of the rotating plate 200 is located in the second cavity 410, when the second cavity 410 is circular, as shown in fig. 5, no matter where the rotating plate 200 rotates, the end 210B of the first arc-shaped part 210 away from the rotation axis and the end 310B of the second arc-shaped part 310 away from the rotation axis fall in the second cavity 410, which avoids the problem that the clamping part 400 interferes with the operation of the liquid sample in the centrifuge tube 800 by the user.

In some embodiments, the inner peripheral radius of the second cavity 410 is greater than or equal to the chord length of the first arcuate portion 210, and the inner peripheral radius of the second cavity 410 is greater than or equal to the chord length of the second arcuate portion 310.

In some embodiments, the outer circumference of the rotating ring 100 is provided with a friction portion 120. In some embodiments, the friction portion 120 may be a friction grid or may be a densely distributed spot-like raised area to facilitate rotation of the rotatable ring 100 by a user.

In some embodiments, the tube cap 10 is provided with a bendable connecting band 600 (see fig. 6), and an end of the connecting band 600 remote from the tube cap 10 is provided with a collar 610. The tube cap 10 can be connected to the centrifuge tube 800 via a collar 610, so that the tube cap 10 is not easily lost.

Figure 6 illustrates a front view of a centrifuge tube kit 20 according to one embodiment of the present application. As shown in fig. 6, the centrifuge tube kit 20 includes: centrifuge tube 800, centrifuge tube 800 comprises an open end 810 and the tube cap 10 described above, wherein the tube cap 10 is used to close the open end 810.

The structure and function of the tube cover 10 are the same as those of the above embodiments, and specific reference may be made to the above embodiments, which are not described herein again.

In some embodiments, the inner circumference of the rotating ring 100 of the tube cover 10 is threaded and can be screwed with the outer circumference of the threaded nozzle of the centrifuge tube 800.

In other embodiments, the inner circumference of the rotating ring 100 of the tube cover 10 is provided with a rubber cushion, which can be interference fit with the outer circumference of the nozzle of the centrifuge tube 800, so as to connect the centrifuge tube 800 with the tube cover 10.

In some embodiments, when the tube cover 10 includes the catching portion 400, the catching portion 400 catches in the open end 810. Set up joint portion 400, make the outer peripheral diameter size of joint portion 400 can realize interference fit with centrifuging tube 800's mouth of pipe inner periphery, consequently, tube cap 10 can connect the centrifuging tube through joint portion 400.

It is understood that the connection of the cap 10 to the centrifuge tube 800 includes, but is not limited to, those listed above.

With continued reference to fig. 6, in some embodiments, when tube cap 10 includes a bendable connecting band 600, a centrifuge tube 800 is inserted into collar 610. In some embodiments, the outer diameter of the nozzle of the centrifuge tube 800 is larger than the outer diameter of the tube body of the centrifuge tube 800, the collar 610 has elasticity, the opening diameter of the collar 610 can be slightly smaller than the outer diameter of the tube body of the centrifuge tube 800, and when the tube body of the centrifuge tube 800 is inserted into the opening of the collar 610, the centrifuge tube 800 can be held/fixed by the elasticity of the collar 610, so that the cap 10 is not easily lost. The centrifuge tube 800 is usually provided with an original tube cap (not shown), and in practical applications, the original tube cap originally provided for the centrifuge tube 800 can be removed, and the tube cap 10 of the present disclosure and the centrifuge tube 800 are connected by the connecting band 610, so that the tube cap 10 of the present disclosure has better versatility.

It will be understood that in this specification, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicate an orientation or positional relationship or dimension based on that shown in the drawings, and that such terms are used for convenience of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting to the scope of this application.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

This description provides many different embodiments or examples that can be used to implement the present application. It should be understood that these various embodiments or examples are purely exemplary and are not intended to limit the scope of protection of the present application in any way. Those skilled in the art can conceive of various changes or substitutions based on the disclosure of the specification of the present application, which are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope defined by the appended claims.

Claims (10)

1. A tube cap for a centrifuge tube, comprising:

a rotating ring;

a rotating piece connected to the rotating ring and capable of rotating together with the rotating ring, wherein a first arc-shaped part is arranged on the rotating piece;

the matching piece is arranged at the lower part of the rotating piece, a second arc-shaped part is arranged on the matching piece, the arc-shaped opening direction of the second arc-shaped part is opposite to the arc-shaped opening direction of the first arc-shaped part, and at least one of the first arc-shaped part and the second arc-shaped part is provided with an elastic piece;

wherein the rotating and mating tabs are shaped and dimensioned to enable rotational movement of the rotating tab relative to the mating tab between a first rotational position in which the first and second arcuate portions enclose a first cavity and a second rotational position in which the second arcuate portion is enclosed by the rotating tab.

2. The tube cover according to claim 1, further comprising a catching portion provided at a lower portion of the mating piece and provided with a second cavity, wherein a projection of the first cavity on the second cavity along the rotation axis of the rotating piece is located within the second cavity.

3. A tube cover according to claim 1, wherein the inner wall of the rotating ring is provided with a guide groove, and the outer periphery of the engaging piece is provided with a projection movable in the guide groove, the guide groove comprising at least:

a first section; and

a second section closer to the rotating tab relative to the first section such that the mating tab abuts the rotating tab when the projection is in the second section.

4. The tube cover of claim 3, wherein the second section includes a detent for receiving the protrusion to prevent the protrusion from moving within the guide slot in the absence of an external force applied to the rotating ring.

5. The tube cover according to claim 1, wherein a hole is provided at a central position of the rotation piece, and a shaft received in the hole is provided at a central position of the fitting piece; or a shaft is arranged at the central position of the rotating piece, and a hole for accommodating the shaft is arranged at the central position of the matching piece.

6. The tube cap of claim 2, wherein the snap-fit portion is a snap ring and the second cavity is circular.

7. A tube cap according to claim 6, wherein a chord length of the first arcuate portion is less than or equal to an inner peripheral radius of the second cavity and a chord length of the second arcuate portion is less than or equal to an inner peripheral radius of the second cavity.

8. The tube cover according to claim 1, wherein an outer circumference of the rotating ring is provided with a friction portion.

9. The tube cover according to claim 1, wherein the tube cover is provided with a bendable connecting band, and a collar is provided at an end of the connecting band away from the tube cover.

10. A centrifuge tube kit, comprising:

a centrifuge tube comprising an open end;

a tube cap according to any of claims 1-9 for closing the open end.

Images