Filter cover structure

Abstract

The utility model discloses a filter cover structure, which relates to the technical field of filter covers, and comprises a bowl-shaped frame and filter membranes, the side wall and the bottom of the bowl-shaped frame are both provided with the filter membranes, the bowl-shaped frame comprises an upper ring body, a lower ring body and a support rod used for connecting the upper ring body and the lower ring body, the periphery of the upper ring body extends outwards to form a support edge, and the support edge extends outwards to form the filter cover. The inner circumference of the upper ring body extends downwards to form an annular cylinder, the periphery of the annular cylinder is rotationally connected with an adjusting sleeve, a plurality of arc-shaped rods arranged around the adjusting sleeve are arranged on the lower surface of the supporting edge, arc-shaped long holes are formed in the ends, away from the adjusting sleeve, of the arc-shaped rods, pin rods are arranged in the arc-shaped long holes, and the pin rods are connected with the supporting edge. The end, close to the adjusting sleeve, of the arc-shaped rod is rotationally connected with the adjusting sleeve. The centrifugal tube fixing device can adapt to centrifugal tubes with different diameters, and the use flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter caps, and particularly relates to a filter cap structure. Background Art

[0002] A filter cap, also known as a cell filter, is used in combination with a centrifuge tube.

[0003] See Figure 1 , the current filter cap includes a bowl-shaped frame and a filter membrane 1. The side wall and bottom of the bowl-shaped frame are both provided with the filter membrane 1. The bowl-shaped frame includes an upper ring body, a lower ring body 3, and a support rod 4 for connecting the upper ring body and the lower ring body 3. A support edge 21 is provided on the outer periphery of the upper ring body, and a gripping portion 211 is provided on the outer periphery of the support edge 21.

[0004] When in use, the user needs to pinch the gripping portion, place the support edge of the filter cap at the mouth of the centrifuge tube, and then pour the experimental liquid to be filtered into the filter cap. The liquid filtered by the filter membrane enters the centrifuge tube.

[0005] Since the diameters of centrifuge tubes have different specifications, and a suitable filter cap needs to be selected according to the specifications of the centrifuge tube, the current filter cap cannot adapt to centrifuge tubes of different diameters, reducing the flexibility of use. Once a filter cap suitable for the centrifuge tube cannot be found temporarily, the filtering progress will be delayed.

[0006] Therefore, how to adapt to centrifuge tubes of different diameters and improve the flexibility of use is a technical problem to be solved currently. Content of the Utility Model

[0007] In view of the above deficiencies of the prior art, the utility model provides a filter cap structure, which can adapt to centrifuge tubes of different diameters and improves the flexibility of use.

[0008] To achieve the above object, the technical solution adopted by the utility model is:

[0009] A filter cap structure includes a bowl-shaped frame and a filter membrane. The side wall and bottom of the bowl-shaped frame are both provided with the filter membrane. The bowl-shaped frame includes an upper ring body, a lower ring body, and a support rod for connecting the upper ring body and the lower ring body. An outer support edge extends outward from the outer periphery of the upper ring body, and an annular cylinder extends downward from the inner periphery of the upper ring body. An adjusting sleeve is rotatably connected to the outer periphery of the annular cylinder. A plurality of arc-shaped rods are provided on the lower surface of the support edge and are arranged around the adjusting sleeve. An arc-shaped long hole is provided at the end of the arc-shaped rod away from the adjusting sleeve, and a pin rod is provided in the arc-shaped long hole and is connected to the support edge. The arc-shaped rod is rotatably connected to the adjusting sleeve at the end close to the adjusting sleeve.

[0010] Further, three arc-shaped rods are provided, and the three arc-shaped rods are evenly arranged around the adjusting sleeve.

[0011] Further, first anti-slip lines are provided on the inner wall of the adjusting sleeve and the outer side of the annular cylinder.

[0012] Further, second anti-slip lines are provided on the outer wall of the adjusting sleeve.

[0013] Further, ear plates are provided on the outer wall of the adjusting sleeve, and one end of the arc-shaped rod close to the adjusting sleeve is rotatably connected to the ear plate through a rotating shaft.

[0014] Further, an avoidance groove is provided at one end of the arc-shaped rod close to the adjusting sleeve, the ear plate is arranged in the avoidance groove, and the bottom surface of the ear plate is flush with the bottom surface of the arc-shaped rod.

[0015] Further, a limiting convex part is provided on the outer side of the annular cylinder, and the top surface of the limiting convex part abuts against the bottom surface of the adjusting sleeve.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. In the present utility model, by rotating the adjusting sleeve, the arc-shaped rod can be driven to rotate together. Since a pin rod is provided in the arc-shaped long hole of the arc-shaped rod, when one end of the arc-shaped rod close to the adjusting sleeve approaches the pin rod, the end of the arc-shaped rod far from the adjusting sleeve can extend outwards. The greater the degree to which the end of the arc-shaped rod far from the adjusting sleeve extends outwards, the more it can be placed on the pipe orifice of a centrifuge tube with a larger diameter, enabling the present utility model to adapt to centrifuge tubes of different diameter sizes, improving the flexibility of use. Furthermore, the emergency response ability can be improved, and the filtration operation can be prevented from being delayed.

[0018] 2. In the present utility model, only by rotating the adjusting sleeve can the degree to which the arc-shaped rod extends outwards be adjusted, and the adjustment operation is simple and convenient, which is beneficial to improving the adjustment efficiency.

[0019] 3. By providing first anti-slip lines on both the inner wall of the adjusting sleeve and the outer side of the annular cylinder, the frictional resistance between the adjusting sleeve and the annular cylinder can be increased. Once the rotation of the adjusting sleeve stops, the friction between the adjusting sleeve and the annular cylinder can be utilized to stabilize the position of the current adjusting sleeve.

[0020] 4. By providing second anti-slip lines on the outer wall of the adjusting sleeve, the frictional resistance between the fingers of the user in contact with the adjusting sleeve can be increased, reducing the probability of slipping.

[0021] 5. Since the bottom surface of the ear plate is flush with the bottom surface of the arc-shaped rod, the stability of the filter cover structure placed on the pipe orifice of the centrifuge tube can be improved.

[0022] 6. By providing a limiting convex part on the outer side of the annular cylinder, the limiting convex part can be utilized to prevent the adjusting sleeve from falling downwards, improving the reliability of the adjustment sleeve fitted on the annular cylinder. Description of the Drawings

[0023] Figure 1It is a schematic structural diagram of the background art;

[0024] Figure 2 It is a perspective view of the filter cover structure without a filter membrane;

[0025] Figure 3 It is the perspective Figure 1 ;

[0026] Figure 4 It is the perspective Figure 2 ;

[0027] Figure 5 It is the front view of the filter cover structure;

[0028] Figure 6 It is the top view of the filter cover structure;

[0029] Figure 7 It is the bottom view of the filter cover structure;

[0030] Figure 8 It is a schematic diagram of the state change of the filter cover structure.

[0031] Explanation of reference numerals:

[0032] 1 - Filter membrane,

[0033] 21 - Support edge, 211 - Grasping part, 22 - Ring-shaped cylinder, 221 - Limit convex part,

[0034] 3 - Lower ring body,

[0035] 4 - Support rod,

[0036] 5 - Adjusting sleeve, 51 - Second anti-slip pattern, 52 - Ear plate,

[0037] 6 - Arc-shaped rod, 61 - Arc-shaped long hole, 62 - Pin rod, 63 - Avoidance groove, 64 - Rotating shaft. Detailed implementation manners

[0038] To better understand the present utility model, the present utility model will be further described below with reference to the accompanying drawings. It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0039] Embodiment:

[0040] See Figures 3 to 7, a filter cap structure, comprising a bowl-shaped frame and a filter membrane 1. The filter membrane 1 is fixedly installed on both the side wall and the bottom of the bowl-shaped frame.

[0041] See Figure 2 , the bowl-shaped frame includes an upper ring body, a lower ring body 3, and support rods 4. The upper ring body is disposed above the lower ring body 3, and the support rods 4 are disposed between the upper ring body and the lower ring body 3. There are four support rods 4, and the four support rods 4 are evenly distributed along the circumferential direction. The upper ring body, the lower ring body 3, and the support rods 4 are of an integral structure. See Figure 3 and Figure 4 , a filter membrane 1 is fixedly installed between the inner circle of the lower ring body 3 and adjacent two support rods 4.

[0042] See Figure 2 , a support edge 21 extends outward from the outer periphery of the upper ring body. A gripping portion 211 is provided on the outer periphery of the support edge 21. The support edge 21 is used to be placed on the mouth of the centrifuge tube to prevent the entire filter cap structure from falling into the interior of the centrifuge tube. An annular cylinder 22 extends downward from the inner periphery of the upper ring body. The upper ring body, the support edge 21, the gripping portion 211, the annular cylinder 22, the support rods 4, and the lower ring body 3 are of an integral structure.

[0043] See Figure 2 , an adjusting sleeve 5 is rotatably connected to the outer periphery of the annular cylinder 22.

[0044] To stabilize the adjusting sleeve 5 after rotation, first anti-slip lines (not shown in the figure) are provided on both the inner wall of the adjusting sleeve 5 and the outer side of the annular cylinder 22. When rotating the adjusting sleeve 5, the user needs to apply force to rotate the adjusting sleeve 5 so that the adjusting sleeve 5 can overcome the frictional force between the adjusting sleeve 5 and the annular cylinder 22 to rotate around the annular cylinder 22. Once the user stops applying force to rotate the adjusting sleeve 5, the frictional force between the adjusting sleeve 5 and the annular cylinder 22 can be utilized to stabilize the current position of the adjusting sleeve 5.

[0045] See Figure 2 , to prevent the user's fingers from slipping with the adjusting sleeve 5 when rotating the adjusting sleeve 5, second anti-slip lines 51 are provided on the outer wall of the adjusting sleeve 5. The second anti-slip lines 51 can increase the frictional resistance of the fingers contacting the adjusting sleeve 5 and reduce the slipping probability.

[0046] See Figure 2 and Figure 7 , three arc-shaped rods 6 are provided on the lower surface of the support edge 21 and are evenly arranged around the adjusting sleeve 5. An arc-shaped long hole 61 is provided at the end of the arc-shaped rod 6 far from the adjusting sleeve 5, and a pin rod 62 is provided in the arc-shaped long hole 61. The pin rod 62 is fixedly connected to the support edge 21.

[0047] See Figure 2 and Figure 7The arc rod 6 is provided with an avoidance groove 63 at one end close to the adjustment sleeve 5, and an ear plate 52 is fixedly installed on the outer wall of the adjustment sleeve 5. The ear plate 52 is arranged in the avoidance groove 63, and the bottom surface of the ear plate 52 is flush with the bottom surface of the arc rod 6. The bottom of the avoidance groove 63 is rotatably connected to the ear plate 52 through a rotating shaft 64.

[0048] See also Figure 2 and Figure 7 A limiting protrusion 221 is fixedly installed on the outer side of the annular cylinder 22. The limiting protrusion 221 is arranged at the bottom of the adjusting sleeve 5. The top surface of the limiting protrusion 221 abuts against the bottom surface of the adjusting sleeve 5. The limiting protrusion 221 can prevent the adjusting sleeve 5 from falling downward, thereby improving the reliability of the adjusting sleeve 5 fitting on the annular cylinder 22.

[0049] The working principle of this embodiment is as follows:

[0050] When the filter cover structure needs to be placed on the nozzle of a centrifuge tube with a larger diameter, see Figure 8 , the user rotates the adjustment sleeve 5 clockwise, and the adjustment sleeve 5 pushes the arc rod 6 to rotate clockwise together. When the arc rod 6 rotates clockwise around the annular cylinder 22, the hole wall of the arc long hole 61 and the pin rod 62 not only slide relative to each other, but also rotate relative to each other. When the rotating shaft 64 rotates to the position closest to the pin rod 62, the end of the arc rod 6 away from the adjustment sleeve 5 stretches outward to the maximum extent. The greater the degree of outward stretching of the end of the arc rod 6 away from the adjustment sleeve 5, the more it can be placed on the nozzle of a centrifuge tube with a larger diameter, preventing the filter cover structure from falling into the inside of the centrifuge tube. At this time, the filter cover structure can be used to filter the experimental liquid.

[0051] When the filter cap structure needs to be placed on the nozzle of a centrifuge tube with a smaller diameter, refer to Figure 8 , the user rotates the adjustment sleeve 5 counterclockwise, and the adjustment sleeve 5 drives the arc rod 6 to rotate counterclockwise. Since the arc long hole 61 is constrained by the pin 62, the end of the arc rod 6 away from the adjustment sleeve 5 gradually closes to the adjustment sleeve 5. At this time, the arc rod 6 in the closed state can be directly placed on the nozzle of the centrifuge tube with a smaller diameter. At this time, this filter cover structure can be used to filter the experimental liquid. Because the bottom surface of the ear plate 52 is flush with the bottom surface of the arc rod 6, the stability of the filter cover structure placed on the nozzle of the centrifuge tube can be improved.

[0052] According to the above working principle, it can be seen that this embodiment has the following effects:

[0053] In this embodiment, the arc rod 6 can be driven to rotate together by rotating the adjusting sleeve 5. Since a pin 62 is provided in the arc-shaped long hole 61 of the arc rod 6, when the end of the arc rod 6 close to the adjusting sleeve 5 is close to the pin 62, the end of the arc rod 6 away from the adjusting sleeve 5 can be stretched outward. The greater the degree of the end of the arc rod 6 away from the adjusting sleeve 5 is stretched outward, the more it can be placed on the nozzle of a centrifuge tube with a larger diameter, so that this embodiment can adapt to centrifuge tubes of different diameters and improves the flexibility of use. Furthermore, the emergency response capability can be improved, temporary adjustment and access are convenient, and the filtration operation can be avoided from being delayed.

[0054] In this embodiment, the degree to which the arc-shaped rod 6 extends outward can be adjusted by simply rotating the adjustment sleeve 5. The adjustment operation is simple and convenient, which is conducive to improving the adjustment efficiency.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A filter cover structure, comprising a bowl-shaped frame and a filter membrane. The side wall and the bottom of the bowl-shaped frame are both provided with the filter membrane. The bowl-shaped frame includes an upper ring body, a lower ring body, and support rods for connecting the upper ring body and the lower ring body. A support edge extends outward from the outer periphery of the upper ring body. It is characterized in that, An annular cylinder extends downward from the inner circumference of the upper ring body. An adjusting sleeve is rotatably connected to the outer circumference of the annular cylinder. A plurality of arc-shaped rods are provided on the lower surface of the supporting edge and are arranged around the adjusting sleeve. An arc-shaped long hole is provided at the end of the arc-shaped rod away from the adjusting sleeve, and a pin rod is arranged in the arc-shaped long hole. The pin rod is connected to the supporting edge, and the arc-shaped rod is rotatably connected to the adjusting sleeve at the end close to the adjusting sleeve.

2. The filter cover structure according to claim 1, wherein There are three arc-shaped rods, and the three arc-shaped rods are evenly arranged around the adjusting sleeve.

3. A filter cap structure according to claim 1, characterized in that, First anti-slip lines are provided on the inner wall of the adjusting sleeve and the outer side of the annular cylinder.

4. A filter cover structure according to claim 1, characterized in that, Second anti-slip lines are provided on the outer wall of the adjusting sleeve.

5. The filter cover structure according to claim 1, wherein An ear plate is provided on the outer wall of the adjusting sleeve, and the arc-shaped rod is rotatably connected to the ear plate through a rotating shaft at the end close to the adjusting sleeve.

6. The filter cover structure according to claim 5, characterized in that, An avoidance groove is provided at the end of the arc-shaped rod close to the adjusting sleeve, the ear plate is arranged in the avoidance groove, and the bottom surface of the ear plate is flush with the bottom surface of the arc-shaped rod.

7. A filter cap structure according to claim 1, characterized in that, A limiting convex part is provided on the outer side of the annular cylinder, and the top surface of the limiting convex part abuts against the bottom surface of the adjusting sleeve.

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