Pipette tip convenient to replace

Abstract

The utility model provides a pipette tip convenient to replace, which comprises a pipette body, a lower supporting tube is arranged on the surface of the lower end of the pipette body, a sliding groove is arranged at the bottom of the lower part of the lower supporting tube, a replacement structure is arranged in the lower supporting tube, a pipette tip is arranged on the surface of the lower end of the lower supporting tube, and the pipette tip is arranged on the surface of the lower end of the lower supporting tube. The utility model discloses a pipette tip, which is used for solving the problems that in the actual use process, if the pipette tip is collided with a solution vessel, the pipette tip is separated from a main body of the pipette, and even the connecting part between the pipette main bodies is damaged.

Description

Technical Field

[0001] The utility model mainly relates to the field of medical air compression, and in particular to a pipette tip which is easy to replace. Background Art

[0002] A pipette, also known as a pipette gun, is a device used to transfer liquids quantitatively. When conducting analytical testing research, a pipette is generally used to transfer a small or trace amount of liquid. Pipettes can be divided into gas piston pipettes and external piston pipettes based on their principles, and the pipette tip is one of the important components of the pipette.

[0003] In the invention patent application with application number CN202121181879.6, application publication date 2021.12.31, and titled "A pipette tip that is easy to replace", it includes a main body and a joint, which is fixed to the top of the main body, a fixing mechanism, which is connected to the surface of the main body, and the main body includes a liquid storage tube, a thread, which is opened on the upper surface of the liquid storage tube, and a chuck, which is connected to the outside of the liquid storage tube. The device improves the sealing between the pipette tip that is replaced by the pipette tip through the sealing ring and the convex strip installed on the inner wall of the joint to avoid leakage. The main body and the liquid storage tube are separated, so that the damaged liquid storage tube can be replaced during convenient use, thereby reducing its use cost.

[0004] However, during actual use of the pipette tip, if it collides with the solution container, the pipette tip and its body will be separated, and even the connection part between the pipette body and the pipette body will be damaged. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model:

[0006] The utility model provides a pipette tip that is easy to replace, which is used to solve the problem that in actual use, if there is a collision with a solution container, the pipette tip will be separated from its body, and even the connection part between the pipette body and the pipette body will be damaged.

[0007] 2. Technical solution:

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is: a pipette tip that is easy to replace, including a pipette body, a lower support tube is arranged on the lower end surface of the pipette body, a sliding groove is arranged on the bottom below the lower support tube, a replacement structure is arranged inside the lower support tube, and a pipette tip is arranged on the lower end surface of the lower support tube.

[0009] Furthermore, the replacement structure is arranged at the bottom of the lower support tube, and a sliding telescopic structure is formed on the surface of the sliding groove, and the pipette tip forms a telescopic structure at the bottom of the lower support tube through the replacement structure.

[0010] Furthermore, the replacement structure includes an air intake pipe arranged inside the lower supporting pipe, the upper end surface of the air intake pipe is fixedly connected to a fixed plate, a traction spring is fixedly connected below the fixed plate, the other end of the traction spring is connected to a sliding sleeve, a movable groove is provided on the lower end surface of the sliding sleeve, a plastic rod is fixedly connected to the surface of the movable groove, a pushing and pressing rod is movably connected to the surface of the sliding sleeve on one side of the top end of the plastic rod, and a long embedding groove is provided on one side of the plastic rod.

[0011] Furthermore, the fixed plate is fixedly connected to the inner wall surface of the lower support tube, and the traction spring and the sliding sleeve are connected to the surface of the intake pipe, the sliding sleeve forms an elastic telescopic structure on the surface of the intake pipe through the traction spring, the pushing and pressing rod forms a sliding structure on the surface of the sliding sleeve, and the plastic rod forms a swinging structure under the action of the pushing and pressing rod, a sealing ring is arranged at the bottom of the intake pipe, and is arranged on the pushing and pressing rod, the plastic rod and both sides of the sliding sleeve.

[0012] Furthermore, the pipette tip includes a sampling pipette, a sliding disc is provided on the upper end surface of the sampling pipette, a mounting groove is provided on the inner surface of the sliding disc, and a sealing groove is provided at the connection position between the sampling pipette and the sliding disc.

[0013] Furthermore, the outer diameter of the sliding disc is the same as the inner diameter of the lower end of the lower support tube, the sampling tube and the sliding disc are connected by mounting grooves and engaging with the long grooves on the surface of the plastic rod, and the sampling tube and the sliding disc are pulled back to the inner wall of the lower end of the lower support tube by a traction spring.

[0014] 3. Beneficial effects:

[0015] The utility model has a reasonable design. When installing the pipette tip, the sliding disc on the upper end of the pipette tip is aligned with the pipe hole at the bottom end of the suction pipe, and the pipette tip is inserted into the bottom end of the suction pipe. At the same time, the push-press rod is manually pressed against the bottom of the sliding groove. At this time, the sealing ring at the bottom of the suction pipe is aligned with the sealing groove. The pipette tip is rotated to make the installation groove on the inner wall of the sliding disc and the long groove at the bottom end of the plastic rod engage and connect. At the same time, the push-press rod is released to make the traction spring tighten the pipette tip to the bottom end of the suction pipe to complete the installation. The sliding disc at the top of the pipette tip is restricted by the inner wall of the lower support tube so that it will not swing left and right. When a bump occurs, the side bump is not easily knocked off because the pipette tip is installed inside the lower support tube. When the pipette tip needs to be replaced, the two pushing and pressing rods are pushed back to the bottom of the sliding groove so that the sliding sleeve pushes the pipette tip out of the lower support tube. At the same time, the two pushing and pressing rods make the two plastic rods swing inward to release the chimeric connection with the pipette tip, completing the quick disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a three-dimensional schematic diagram of the lower support tube of the utility model;

[0018] Figure 3 This is a schematic diagram of the replacement structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the replacement structure plane of the utility model;

[0020] Figure 5 It is a schematic diagram of the liquid transfer tip of the utility model.

[0021] Reference numerals:

[0022] 1. Pipette body; 2. Lower support tube; 3. Sliding groove; 4. Replacement structure; 401. Suction tube; 402. Fixed disk; 403. Traction spring; 404. Sliding sleeve; 405. Movable groove; 406. Plastic rod; 407. Push-press rod; 408. Long embedded groove; 5. Pipette tip; 501. Sampling pipette; 502. Sliding disc; 503. Mounting embedded groove; 504. Sealing groove. DETAILED DESCRIPTION

[0023] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Example

[0024] See attached Figure 1-5 , including a pipette gun body 1, a lower support tube 2 is arranged on the lower end surface of the pipette gun body 1, a sliding groove 3 is arranged on the bottom below the lower support tube 2, a replacement structure 4 is arranged inside the lower support tube 2, a pipette tip 5 is arranged on the lower end surface of the lower support tube 2, the replacement structure 4 is arranged at the bottom of the lower support tube 2, and a sliding telescopic structure is formed on the surface of the sliding groove 3, the pipette tip 5 forms a telescopic structure at the bottom of the lower support tube 2 through the replacement structure 4, and the device can be quickly replaced through the replacement structure 4 and the pipette tip 5.

[0025] The replacement structure 4 includes an air intake pipe 401 arranged inside the lower support pipe 2, the upper end surface of the air intake pipe 401 is fixedly connected to a fixed plate 402, a traction spring 403 is fixedly connected below the fixed plate, the other end of the traction spring 403 is connected to a sliding sleeve 404, the lower end surface of the sliding sleeve 404 is provided with a movable groove 405, the surface of the movable groove 405 is fixedly connected to a plastic rod 406, one side of the top end of the plastic rod 406 is movably connected to a pushing and pressing rod 407 on the surface of the sliding sleeve 404, and one side of the plastic rod 406 is provided with a long embedded groove 408. The fixed plate 402 is fixedly connected to the inner wall surface of the lower support tube 2, and the traction spring 403 and the sliding sleeve 404 are sleeved and connected to the surface of the intake pipe 401. The sliding sleeve 404 forms an elastic telescopic structure on the surface of the intake pipe 401 through the traction spring 403. The pushing and pressing rod 407 forms a sliding structure on the surface of the sliding sleeve 404, and the plastic rod 406 forms a swinging structure under the action of the pushing and pressing rod 407. A sealing ring is arranged at the bottom of the intake pipe 401, and is arranged on the pushing and pressing rod 407, the plastic rod 406 and both sides of the sliding sleeve 404.

[0026] 4. When the pipette tip is installed, the sliding disc 502 at the upper end of the pipette tip 5 is aligned with the pipe hole at the bottom end of the suction tube 401, and the pipette tip is inserted into the bottom end of the suction tube 401. At the same time, the pushing and pressing rod 407 is manually pressed against the bottom of the sliding groove 3. At this time, the sealing ring at the bottom of the suction tube 401 is aligned with the sealing groove 504, and the pipette tip 5 is rotated to make the installation groove 503 on the inner wall of the sliding disc 502 and the long groove 408 at the bottom end of the plastic rod 406 engage and connect. At the same time, the pushing and pressing rod 407 is released to make the traction spring 403 tighten the pipette tip 5 to the bottom of the suction tube 401 to complete the installation. Since the sliding disc 502 at the top of the pipette tip 5 is restricted by the inner wall of the lower support tube 2, it will not swing left and right. When a bump occurs, the side bump is not easy to be knocked off because the pipette tip 5 is installed inside the lower support tube 2.

[0027] The pipette tip 5 includes a sampling pipette 501, a sliding disc 502 is provided on the upper end surface of the sampling pipette 501, a mounting groove 503 is provided on the inner surface of the sliding disc 502, a sealing groove 504 is provided at the connection position between the sampling pipette 501 and the sliding disc 502, the outer diameter of the sliding disc 502 is the same as the inner diameter of the lower end of the lower support tube 2, the sampling pipette 501 and the sliding disc 502 are engaged with the long groove 408 on the surface of the plastic rod 406 through the mounting groove 503, and the sampling pipette 501 and the sliding disc 502 are pulled back to the inner wall of the lower end of the lower support tube 2 by the traction spring 403.

[0028] In this embodiment, when it is necessary to replace the pipette tip 5, the two pushing and pressing rods 407 are pushed back to the bottom of the sliding groove 3, so that the sliding sleeve 404 pushes the pipette tip 5 out of the lower support tube 2. At the same time, the two pressing and pushing rods 407 cause the two plastic rods 406 to swing inward, releasing the interlocking connection with the pipette tip 5, thereby completing the quick disassembly and replacement.

[0029] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A pipette tip that is easy to replace, characterized in that : comprising a pipette body (1), a lower support tube (2) being arranged on the lower end surface of the pipette body (1), a sliding groove (3) being arranged on the bottom of the lower support tube (2), a replacement structure (4) being arranged inside the lower support tube (2), and a pipette tip (5) being arranged on the lower end surface of the lower support tube (2), The replacement structure (4) comprises an air intake pipe (401) arranged inside the lower support pipe (2); a fixed plate (402) is fixedly connected to the upper end surface of the air intake pipe (401); a traction spring (403) is fixedly connected below the fixed plate; the other end of the traction spring (403) is connected to a sliding sleeve (404); a movable groove (405) is arranged on the lower end surface of the sliding sleeve (404); a plastic rod (406) is fixedly connected to the surface of the movable groove (405); a pushing and pressing rod (407) is movably connected to the surface of the sliding sleeve (404) at one side of the top end of the plastic rod (406); and a long embedded groove (408) is arranged on one side of the plastic rod (406).

2. The easily replaceable pipette tip according to claim 1, characterized in that: The replacement structure (4) is arranged at the bottom of the lower support tube (2), and forms a sliding telescopic structure on the surface of the sliding groove (3); the pipette tip (5) forms a telescopic structure at the bottom of the lower support tube (2) through the replacement structure (4).

3. The easily replaceable pipette tip according to claim 1, characterized in that: The fixed plate (402) is fixedly connected to the inner wall surface of the lower support tube (2), and the traction spring (403) and the sliding sleeve (404) are sleeve-connected to the surface of the air intake pipe (401). The sliding sleeve (404) forms an elastic telescopic structure on the surface of the air intake pipe (401) through the traction spring (403). The pushing and pressing rod (407) forms a sliding structure on the surface of the sliding sleeve (404), and the plastic rod (406) forms a swinging structure under the action of the pushing and pressing rod (407). A sealing ring is provided at the bottom of the air intake pipe (401), and the pushing and pressing rod (407) and the plastic rod (406) are provided on both sides of the sliding sleeve (404).

4. The easily replaceable pipette tip according to claim 1, characterized in that: The pipette tip (5) comprises a sampling pipette (501), the upper end surface of the sampling pipette (501) is provided with a sliding disc (502), the inner surface of the sliding disc (502) is provided with a mounting groove (503), and a sealing groove (504) is provided at the connection position between the sampling pipette (501) and the sliding disc (502).

5. The easily replaceable pipette tip according to claim 4, characterized in that: The outer diameter of the sliding disc (502) is the same as the inner diameter of the lower end of the lower support tube (2). The sampling tube (501) and the sliding disc (502) are connected to the long groove (408) on the surface of the plastic rod (406) through the installation groove (503). The sampling tube (501) and the sliding disc (502) are pulled back to the inner wall of the lower end of the lower support tube (2) through the traction spring (403).

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