Conveniently open-through dilution pipette

Abstract

The application discloses a convenient opening and conducting dilution pipette, which comprises a closed air bag, an external positioning sleeve, an internal positioning tube, a liquid sampling tube and an opening and closing conducting assembly. The upper end of the internal positioning tube is provided with an opening and closing ring which can be separated upward. The opening and closing ring is driven to move upward by rotating the driving threaded column, and the lower end of the opening and closing ring is separated from the upper end of the internal positioning tube, and the lower end of the opening and closing ring is separated upward from the inner side of the annular sealing sleeve. In this way, the upper end of the internal positioning tube and the lower end of the opening and closing ring are notched, the inside of the closed air bag is conducted with the internal positioning tube, and after the liquid sample is collected through the liquid sampling tube, the closed air bag is directly squeezed, the dilution liquid in the closed air bag passes downward through the internal positioning tube and is discharged together with the liquid sample, and thus the liquid is conveniently conducted, diluted and discharged.

Description

Technical Field

[0001] This invention relates to a convenient-opening conductive dilution pipette. Background Technology

[0002] In existing technologies, biological and chemical experiments often require sample dilution. The current method typically involves using a pipette to first measure the diluent, then the sample, adding the sample to the diluent, mixing thoroughly, and then transferring the diluted solution. This multi-step process is cumbersome and wasteful of experimental materials. Therefore, the existing technology developed with publication number CN 208505741... U's patented technology pre-seals the diluent in an airbag, with the lower end of the airbag connected and sealed to the upper end of a capillary tube. A flexible suture is placed around the upper part of the capillary tube, allowing it to be broken during use, thus connecting the airbag and the capillary tube. After collecting a liquid sample at the lower end of the capillary tube, the diluent and liquid sample are squeezed out together by the airbag, achieving integrated sample collection and dilution. However, this structure has drawbacks such as glass fragments appearing inside the airbag when the upper end of the capillary tube is broken, sometimes causing damage, and the breaking process is inconvenient. Therefore, improvements in the ease of connection are needed. Summary of the Invention

[0003] To address the shortcomings of the prior art, the present invention provides a convenient, openable dilution pipette that avoids damage and puncture of the air bladder.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A convenient-opening conductive dilution pipette includes a sealing airbag, an external positioning sleeve, an internal positioning tube, a sampling tube, and an opening / closing conductive assembly. The lower end of the sealing airbag is connected to the external positioning sleeve. The internal positioning tube is inserted into the center of the interior of the external positioning sleeve. The lower periphery of the internal positioning tube is connected to the lower periphery of the external positioning sleeve. The upper end of the sampling tube is inserted into the lower periphery of the internal positioning tube. The opening / closing conductive assembly includes an annular sealing sleeve, an opening / closing ring, a guide rod, a drive threaded post, a positioning block, and a telescopic tube body. The positioning block is installed at the center of the upper end of the sealing airbag. A drive threaded post is installed in the center of the interior of the sealing airbag. The upper end of the drive threaded post is rotatably engaged with the center of the positioning block. The lower end of the drive threaded post is threadedly connected to an opening / closing ring. The upper periphery of the opening / closing ring is connected to the lower periphery of the positioning block. A telescopic tube is fitted onto the inner side of the upper end of the built-in positioning tube; a guide slot is provided on each of the two sides of the lower end of the opening and closing ring; the lower ends of the guide slots on both sides of the lower end of the opening and closing ring are respectively inserted into the guide slots at the upper end of the built-in positioning tube; the lower end face of the opening and closing ring abuts against the upper end face of the built-in positioning tube; an annular sealing sleeve is fixedly installed around the inner side of the upper end of the outer positioning sleeve; the abutment point of the end faces of the opening and closing ring and the built-in positioning tube is located inside the annular sealing sleeve, and the annular sealing sleeve seals the abutment point of the end faces of the opening and closing ring and the built-in positioning tube; the sealed airbag is encapsulated with diluent liquid; the drive threaded column rotates to drive the opening and closing ring to move upward, causing the lower end of the opening and closing ring to separate from the upper end of the built-in positioning tube, and at the same time causing the lower end of the opening and closing ring to separate upward from the inner side of the annular sealing sleeve.

[0006] Furthermore, it also includes a bottom assembly component; the lower end of the built-in positioning tube is fixedly installed to the lower end of the outer positioning sleeve through the bottom assembly component; the bottom assembly component includes an abutment ring, a locking rod, and a positioning ring; a locking rod is installed on each side of the lower end of the outer positioning sleeve, and the locking rod rotates and engages around the lower end of the outer positioning sleeve; an abutment ring is installed around the lower end of the built-in positioning tube; a locking channel is provided on each side of the abutment ring, and a positioning opening is opened below the locking channel; the locking channel of the abutment ring slides in from the lower end of the locking rod, the upper end of the abutment ring abuts against the lower end of the outer positioning sleeve, the lower end of the locking rod extends to the positioning opening, and a positioning ring is threaded onto the lower end of the locking rod, and the upper end of the positioning ring rotates and presses against the upper side wall of the positioning opening.

[0007] Furthermore, the lower end of the outer positioning sleeve is provided with a snap-fit ​​ring groove; the upper end of the insertion locking rod is provided with a rotating locking block; the rotating locking block at the upper end of the insertion locking rod is rotatably engaged with the snap-fit ​​ring groove around the lower end of the outer positioning sleeve.

[0008] Furthermore, the positioning block is provided with a rotating snap-fit ​​channel; the upper end of the drive threaded column is provided with a snap-fit ​​plate; the snap-fit ​​plate is rotatably snapped into the rotating snap-fit ​​channel of the positioning block; an annular sealing ring is provided around the upper part of the rotating snap-fit ​​channel; the lower side of the annular sealing ring abuts against the upper part of the snap-fit ​​plate; a through-drive rod is provided in the middle of the upper part of the snap-fit ​​plate; the through-drive rod extends to the upper outside of the positioning block.

[0009] Furthermore, the annular sealing sleeve is made of elastic rubber material.

[0010] Furthermore, the telescopic tube is made of corrugated pipe.

[0011] Furthermore, a liquid collection sealing hole is provided on one side of the lower part of the liquid collection tube.

[0012] Furthermore, the external positioning sleeve is made of rigid plastic.

[0013] The beneficial effects of this invention are as follows:

[0014] This invention features an opening and closing ring at the upper end of the built-in positioning tube, capable of upward separation. The ring is driven upward by rotating a threaded column, causing its lower end to separate from the upper end of the built-in positioning tube. Simultaneously, the lower end of the ring separates upward from the inner side of the annular sealing sleeve, creating a gap between the upper end of the built-in positioning tube and the lower end of the opening and closing ring. This allows communication between the sealed airbag and the interior of the built-in positioning tube. After collecting a liquid sample through the sampling tube, the sealed airbag is directly squeezed, causing the diluent inside the sealed airbag to flow downward through the built-in positioning tube and be discharged along with the liquid sample. This facilitates convenient communication and dilution of the discharged liquid. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the sealed airbag and the built-in positioning tube after they are connected.

[0017] Figure 3 For the present invention Figure 1 A schematic diagram of the upper structure.

[0018] Figure 4 For the present invention Figure 1 A schematic diagram of the structure in which the closed loop of the central valve unit abuts and seals with the built-in positioning tube.

[0019] Figure 5 For the present invention Figure 2 A schematic diagram of the structure of the central closed loop separating upward from the built-in positioning tube.

[0020] Figure 6This is an enlarged structural diagram of the upper end of the driving threaded column and the positioning block of the present invention.

[0021] Figure 7 This is an enlarged structural schematic diagram of the bottom assembly component of the present invention.

[0022] Figure 8 This is a top view cross-sectional diagram of the built-in positioning tube of the present invention. Detailed Implementation

[0023] The invention will now be described in further detail with reference to the accompanying drawings.

[0024] like Figures 1 to 8 As shown, a convenient-opening conductive dilution pipette includes a sealing airbag 1, an external positioning sleeve 2, an internal positioning tube 3, a sampling tube 5, and an opening / closing conductive assembly 4. The lower end of the sealing airbag 1 is connected to the external positioning sleeve 2. The internal positioning tube 3 is inserted into the middle of the interior of the external positioning sleeve 2. The lower periphery of the internal positioning tube 3 is connected to the lower periphery of the external positioning sleeve 2. The upper end of the sampling tube 5 is inserted into the lower periphery of the internal positioning tube 3. The opening / closing conductive assembly 4 includes an annular sealing sleeve 44, an opening / closing ring 43, a guide rod 46, a drive threaded post 41, a positioning block 45, and a telescopic tube body 42. The positioning block 45 is installed in the middle of the upper end of the sealing airbag 1. A drive threaded post 41 is installed in the middle of the interior of the sealing airbag 1. The upper end of the drive threaded post 41 is rotatably engaged with the middle of the positioning block 45. The lower end of the drive threaded post 41 is threadedly connected to an opening / closing ring 43. The upper periphery of the opening / closing ring 43 is connected to the lower end of the positioning block 45. A telescopic tube 42 is fitted around the perimeter; a guide slot 31 is provided on each of the two inner sides of the upper end of the built-in positioning tube 3; a guide rod 46 is installed on each of the two lower sides of the opening and closing ring 43; the lower ends of the guide rods 46 on both sides of the lower end of the opening and closing ring 43 are inserted into the guide slots 31 at the upper end of the built-in positioning tube 3; the lower end face of the opening and closing ring 43 abuts against the upper end face of the built-in positioning tube 3; an annular sealing sleeve 44 is fixedly installed around the inner side of the upper end of the outer positioning sleeve 2; the abutment of the end faces of the opening and closing ring 43 and the built-in positioning tube 3 is located inside the annular sealing sleeve 44, and the annular sealing sleeve 44 seals the abutment of the end faces of the opening and closing ring 43 and the built-in positioning tube 3; the sealed airbag 1 contains a diluent liquid; the drive threaded column 41 rotates to drive the opening and closing ring 43 to move upward, and causes the lower end of the opening and closing ring 43 to separate from the upper end of the built-in positioning tube 3, and at the same time causes the lower end of the opening and closing ring 43 to separate upward from the inside of the annular sealing sleeve 44.

[0025] like Figures 1 to 8As shown, to achieve flexible and convenient assembly of the built-in positioning tube 3 and the external positioning sleeve 2, a further preferred embodiment includes a bottom assembly component 6; the lower end of the built-in positioning tube 3 is fixedly installed to the lower end of the external positioning sleeve 2 via the bottom assembly component 6; the bottom assembly component 6 includes an abutment ring 61, a locking rod 62, and a positioning ring 63; a locking rod 62 is installed on each side of the lower end of the external positioning sleeve 2, and the locking rod 62 rotates and engages around the lower end of the external positioning sleeve 2; the lower end of the built-in positioning tube 3... An abutment ring 61 is installed around the perimeter of the outer positioning sleeve 2. Locking channels 611 are provided on both sides of the abutment ring 61, and a positioning opening 612 is formed below each locking channel 611. The locking channels 611 of the abutment ring 61 slide into the lower end of the insertion locking rod 62. The upper end of the abutment ring 61 abuts against the lower end of the outer positioning sleeve 2. The lower end of the insertion locking rod 62 extends to the positioning opening 612, and a positioning ring 63 is threaded onto the lower end of the insertion locking rod 62. The upper end of the positioning ring 63 rotates and presses against the upper sidewall of the positioning opening 612. Furthermore, a locking ring groove is provided around the lower perimeter of the outer positioning sleeve 2; a rotating locking block is provided at the upper end of the insertion locking rod 62; the rotating locking block at the upper end of the insertion locking rod rotates and engages with the locking ring groove around the lower perimeter of the outer positioning sleeve.

[0026] like Figures 1 to 8 As shown, to facilitate the driving of the threaded column 41 and ensure sealing, preferably, the positioning block 45 is provided with a rotating snap-fit ​​channel 451; the upper end of the driving threaded column 41 is provided with a snap-fit ​​plate 411; the snap-fit ​​plate 411 is rotatably snapped into the rotating snap-fit ​​channel 451 of the positioning block 45; an annular sealing ring 452 is provided around the upper part of the rotating snap-fit ​​channel 451; the lower side of the annular sealing ring 452 abuts against the upper part of the snap-fit ​​plate 411; a through-drive rod 453 is provided in the middle of the upper end of the snap-fit ​​plate 411; the through-drive rod 453 extends to the outer part of the upper end of the positioning block 45. Further, the annular sealing sleeve 44 is made of elastic rubber material. Further, the telescopic tube 42 is made of corrugated pipe. Further, a liquid collection sealing hole is provided on one side of the lower part of the liquid collection tube 5. Further, the outer positioning sleeve 2 is made of rigid plastic material.

[0027] This invention features an opening and closing ring 43 at the upper end of the built-in positioning tube 3, which can move upwards. The opening and closing ring 43 is driven to move upwards by rotating the threaded column 41, causing the lower end of the opening and closing ring 43 to separate from the upper end of the built-in positioning tube 3. At the same time, the lower end of the opening and closing ring 43 separates upwards from the inner side of the annular sealing sleeve 44, thus creating a gap between the upper end of the built-in positioning tube 3 and the lower end of the opening and closing ring 43. This allows the sealed airbag 1 to communicate with the interior of the built-in positioning tube 3. After collecting a liquid sample through the liquid collection tube 5, the sealed airbag 1 can be directly squeezed, causing the diluent inside the sealed airbag 1 to flow downwards through the built-in positioning tube 3 and be discharged along with the liquid sample. This achieves convenient communication and dilution of the liquid.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A convenience open-through dilution pipette, characterized by, The utility model provides a kind of liquid sampling device, including closed air bag, external positioning sleeve, built-in positioning tube, liquid sampling tube, open and close guide assembly;The lower end of the closed air bag is connected with the external positioning sleeve in the middle;The built-in positioning tube is inserted into the internal middle of the external positioning sleeve;The lower end of the built-in positioning tube is connected with the lower end of the external positioning sleeve around;The upper end of the liquid sampling tube is inserted into the lower end of the built-in positioning tube inside;The open and close guide assembly includes annular sealing sleeve, open and close ring, guide insertion rod, drive threaded column, positioning block, telescopic pipe body;The positioning block is installed in the upper end of the closed air bag in the middle;One drive threaded column is installed in the internal middle of the closed air bag;The upper end of the drive threaded column is rotatably connected with the middle of the positioning block;The lower end of the drive threaded column is threadedly connected with an open and close ring;The upper end of the open and close ring is sleeved with a telescopic pipe body around the lower end of the positioning block;The upper end of the built-in positioning tube is provided with a guide insertion slot on both sides;The lower end of the open and close ring is installed with a guide insertion rod on both sides;The lower end of the guide insertion rod on both sides of the open and close ring is inserted into the guide insertion slot on the upper end of the built-in positioning tube;The lower end surface of the open and close ring is abutted to the upper end surface of the built-in positioning tube;The upper end of the external positioning sleeve is fixedly installed with an annular sealing sleeve on the inner side around;The end surface of the open and close ring and the built-in positioning tube is abutted to the inside of the annular sealing sleeve, and the annular sealing sleeve seals the end surface of the open and close ring and the built-in positioning tube;The inside of the closed air bag is packaged with diluent liquid;The drive threaded column rotates to drive the open and close ring to move upward, and the lower end of the open and close ring is separated from the upper end of the built-in positioning tube, and the lower end of the open and close ring is separated from the inside of the annular sealing sleeve upward.

2. The convenience-opening dilution pipette of claim 1, wherein, It also includes bottom assembly component;The lower end of the built-in positioning tube is fixedly installed in the lower end of the external positioning sleeve through the bottom assembly component;The bottom assembly component includes abutment ring body, insertion locking rod and positioning ring;The lower end of the external positioning sleeve is installed with an insertion locking rod on both sides respectively, and the insertion locking rod is rotatably connected around the lower end of the external positioning sleeve;The lower end of the built-in positioning tube is installed with an abutment ring body around;The abutment ring body is provided with a locking channel on both sides, and a positioning opening is formed below the locking channel;The locking channel of the abutment ring body is slid from the lower end of the insertion locking rod, and the upper end of the abutment ring body is abutted to the lower end of the external positioning sleeve, and the lower end of the insertion locking rod extends to the positioning opening, and the lower end of the insertion locking rod is threadedly connected with a positioning ring, and the upper end of the positioning ring is rotatably abutted to the upper side wall of the positioning opening.

3. The convenience-opening dilution pipette of claim 2, wherein, The lower end of the external positioning sleeve is provided with a clamping ring groove around;The upper end of the insertion locking rod is provided with a rotating clamping block;The rotating clamping block of the upper end of the insertion locking rod is rotatably connected on the clamping ring groove around the lower end of the external positioning sleeve.

4. The convenience-opening dilution pipette of claim 1, wherein, The positioning block is provided with a rotating clamping channel;The upper end of the drive threaded column is provided with a clamping plate;The clamping plate is rotatably connected in the rotating clamping channel of the positioning block;The inside of the rotating clamping channel is provided with an annular sealing ring around the upper end;The lower side of the annular sealing ring is abutted to the upper end of the clamping plate around;The upper end of the clamping plate is provided with a penetrating drive rod;The penetrating drive rod extends to the upper end of the positioning block outside.

5. The convenience- open dilution pipette according to claim 1, wherein, The annular sealing sleeve is made of elastic rubber material.

6. The convenience- open dilution pipette according to claim 1, wherein, The telescopic pipe body is made of bellows.

7. The convenience- open dilution pipette according to claim 1, wherein The lower part of the liquid sampling pipe is provided with a liquid sampling closed hole.

8. The convenience-facilitating, open-draught dilution pipette according to claim 1, characterized in that The external positioning sleeve is made of hard plastic material.

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