Improved big-belly pipette

Abstract

The utility model belongs to the technical field of experimental equipment, and provides an improved big-belly pipette which comprises a main pipe body, the main pipe body comprises an upper pipe part, a middle belly part and a lower pipe part which are integrally connected, the upper pipe part and the lower pipe part are respectively arranged at two ends of the middle belly part, and a sharp mouth part is arranged at the tail end of the lower pipe part. The protective pipe sleeve is detachably arranged on the periphery of the sharp mouth part in a sleeving manner; the inner diameter of the protection pipe sleeve is matched with the outer diameter of the lower pipe part, and the length of the protection pipe sleeve is larger than that of the sharp mouth part so that the sharp mouth part can be completely contained in the cavity of the protection pipe sleeve. The improved big-bellied pipette provided by the utility model can effectively avoid the damage caused by the contact between the tip of the pipette and the wall of a solution container in the solution suction process, improve the convenience and stability of the use of the big-bellied pipette, and prolong the service life of the big-bellied pipette.

Description

Technical Field

[0001] The utility model belongs to the technical field of experimental equipment, and particularly relates to an improved large-bellied pipette. Background Art

[0002] At present, the big-bellied pipette is generally provided with a pointed mouth to facilitate fast and accurate absorption of the solution. However, in the specific use process, due to the small diameter of the pointed mouth, it is very easy to touch the container mouth or the container wall of the solution to be absorbed, causing damage to the pointed mouth of the big-bellied pipette, especially when the solution container is a glass container, it is difficult for the operator to completely ensure that the pointed mouth does not contact or collide with the container wall when inserting or removing the pointed mouth of the big-bellied pipette into or out of the solution container, resulting in the breakage and destruction of the pointed mouth of some big-bellied pipettes; at the same time, for some large-capacity big-bellied pipettes, their length is often relatively long, such as a 50ml big-bellied pipette, which is about 570mm long, and a 100ml big-bellied pipette, which is about 620mm long. The long length makes it difficult for the operator to ensure that the pointed mouth does not contact or collide with the container wall.

[0003] In addition, the big-bellied pipette usually needs to be used in conjunction with an ear cleaning bulb. During the connection and installation of the ear cleaning bulb, the operator needs to hold the tail end of the pipette and insert the tail end into the ear cleaning bulb. The tip or middle part of the big-bellied pipette cannot be held. However, the end of the existing big-bellied pipette is a smooth straight tube. When the operator holds and pushes it to the ear cleaning bulb connecting tube, it is difficult to apply force and it is easy to slip. The operation is difficult and it is very easy to cause the connection between the big-bellied pipette and the ear cleaning bulb to be loose.

[0004] Therefore, it is necessary to design an improved big-bellied pipette which is easy to use and can prevent the tip of the big-bellied pipette from being damaged by contact with the container wall. Summary of the invention

[0005] In order to solve the above technical problems, the utility model proposes an improved big-bellied pipette, which can effectively avoid damage caused by the tip of the pipette touching the wall of the solution container during the process of sucking the solution, improve the convenience and stability of the use of the big-bellied pipette, and extend the service life of the big-bellied pipette.

[0006] The technical solution of the utility model is:

[0007] The utility model provides an improved large-bellied pipette, comprising a main body, wherein the main body comprises an upper tube portion, a middle tube portion, and a lower tube portion connected in an integral manner, wherein the upper tube portion and the lower tube portion are respectively arranged at two ends of the middle tube portion, a pointed mouth portion is arranged at the end of the lower tube portion, and further comprises a detachable protective tube sleeve which is sleeved on the outer periphery of the pointed mouth portion;

[0008] The inner diameter of the protective sleeve is matched with the outer diameter of the lower tube portion, and the length of the protective sleeve is greater than the length of the pointed mouth portion, so that the pointed mouth portion is completely accommodated in the cavity of the protective sleeve.

[0009] Preferably, the cavity of the protective sleeve is a columnar cavity, and the pointed mouth is arranged in the columnar cavity.

[0010] Preferably, the cavity of the protective tube sleeve is an inverted conical cavity, and the conical cavity is matched with the pointed mouth portion so that the outer wall of the pointed mouth portion abuts against the inner wall of the protective tube sleeve.

[0011] Preferably, a chamfered portion is provided at the end of the protective tube sleeve away from the main tube body, and the highest end position of the chamfered portion is lower than the end position of the pointed mouth portion.

[0012] Preferably, the upper tube portion is provided with a clamping and pushing ring block, and the clamping and pushing ring block is arranged close to the end of the upper tube portion to facilitate gripping and pushing.

[0013] Preferably, the clamping and pushing ring block is an inverted gyro-shaped convex ring arranged on the outer side wall of the upper tube portion, and its lower end surface is a plane.

[0014] Preferably, the maximum outer diameter of the clamping and pushing ring block is not greater than the maximum outer diameter of the middle belly portion.

[0015] Preferably, the clamping push ring block and the upper tube portion are of an integrated structure.

[0016] Compared with the prior art, the utility model has the following advantages and effects:

[0017] (1) A detachable protective tube sleeve is used to cover the outer periphery of the tip, which can isolate and protect the tip, effectively preventing the tip of the pipette from contacting or colliding with the container wall during the process of inserting or removing the pipette from the solution container, thereby avoiding the tip of the pipette from being broken or damaged due to contact, extending the service life of the pipette, and improving its stability and safety in use;

[0018] (2) A chamfered portion is provided at the end of the protective tube sleeve, and the highest end of the chamfered portion is located lower than the sharp mouth portion, so as to ensure that the sharp mouth portion is completely embedded in the interior of the protective tube sleeve. At the same time, the setting of the chamfered portion can facilitate the absorption of the solution. The large-bellied pipette can be inserted against the bottom wall of the container to absorb the solution, thereby ensuring that the sharp mouth portion is located below the liquid surface of the solution;

[0019] (3) A clamping and pushing ring block is used near the end of the upper tube. The clamping and pushing ring block is convenient for the operator to grasp and apply force. On the one hand, it can reduce the difficulty of connecting the large-bellied pipette and the ear cleaning bulb, ensuring the sealing and stability of the connection. On the other hand, after the liquid is absorbed, it is necessary to remove the ear cleaning bulb and block the end of the pipette with the index finger. At this time, other fingers can be supported on the end face of the clamping and pushing ring block, thereby improving the stability of the grip and avoiding accidents such as slipping and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the improved big-bellied pipette in Example 1 of the utility model;

[0021] Figure 2 This is a schematic diagram of the explosion structure of the improved big-bellied pipette in Example 1 of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the protective tube sleeve in the improved large-bellied pipette in Example 2 of the utility model;

[0023] Figure 4 for Figure 3 Sectional view at position AA;

[0024] Figure 5 This is a schematic diagram of the structure of the protective tube sleeve in the improved large-bellied pipette in Example 3 of the utility model;

[0025] Figure 6 for Figure 5 Sectional view at the middle position BB;

[0026] Figure 7 This is a schematic structural diagram of the improved large-bellied pipette in Example 4 of the utility model.

[0027] Figure numerals: 1. main pipe body; 11. upper pipe part; 12. middle belly part; 13. lower pipe part; 14. pointed mouth part; 2. protective pipe sleeve; 21. beveled part; 3. clamping and pushing ring block. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is now further described in conjunction with specific implementation methods.

[0029] Embodiment 1:

[0030] like Figure 1~Figure 2As shown, the utility model provides an improved large-bellied pipette, comprising a main body 1 and a protective tube sleeve 2 detachably connected thereto; wherein the main body 1 comprises an upper tube portion 11, a middle belly portion 12, and a lower tube portion 13 connected in an integral manner, the upper tube portion 11 and the lower tube portion 13 are respectively arranged at both ends of the middle belly portion 12 and are connected thereto, a pointed mouth portion 14 is arranged at the end of the lower tube portion 13, the protective tube sleeve 2 is provided with a columnar cavity, and the pointed mouth portion 14 is arranged in the columnar cavity.

[0031] The protective tube sleeve 2 is detachably mounted on the outer circumference of the pointed mouth portion 14. Specifically, the inner diameter of the protective tube sleeve 2 is matched with the outer diameter of the lower tube portion 13, so that the protective tube sleeve 2 can be stably mounted at the connection position between the lower tube portion 13 and the pointed mouth portion 14. The length of the protective tube sleeve 2 is greater than the length of the pointed mouth portion 14, so that the pointed mouth portion 14 can be completely accommodated in the connecting cavity of the protective tube sleeve 2.

[0032] It should be noted that during actual use, the upper end of the protective tube sleeve 2 is sleeved on the outer periphery of the lower tube portion 13 to improve the stability of the connection of the protective tube sleeve 2. At the same time, a part of the pointed mouth portion 14 grows out of the lower end of the protective tube sleeve 2 to avoid the end of the pointed mouth portion 14 from touching the bottom wall of the container.

[0033] After the solution is absorbed, the lower tube portion 13 of the main body 1 of the large-bellied pipette is wiped with absorbent paper (wipe from top to bottom), and the protective tube sleeve 2 is removed at the same time, and the sharp mouth portion 14 is wiped, thereby completing the wiping of the large-bellied pipette.

[0034] Optionally, in some embodiments, the main pipe body 1 is a glass pipe body, specifically a high borosilicate glass pipe, and the protective pipe sleeve 2 is a corrosion-resistant hose sleeve, specifically a polyvinyl chloride (PVC) hose.

[0035] Embodiment 2:

[0036] For Example 2 of the utility model, Figure 3 , Figure 4 Note that description of parts that are not different from those in Embodiment 1 will be omitted and will be given the same reference numerals.

[0037] like Figure 3 , Figure 4 As shown, the utility model relates to an improved large-bellied pipette, wherein the protective tube sleeve 2 is provided with an inverted conical cavity, and the conical cavity is adapted to the sharp mouth portion 14, that is, the internal cavity of the protective tube sleeve 2 is a gradually narrowing frustum-shaped cavity adapted to the sharp mouth portion 14, so that the outer wall of the sharp mouth portion 14 is in contact with the inner wall of the conical cavity of the protective tube sleeve 2, and the elastic and soft protective tube sleeve 2 can provide good support for the sharp mouth portion 14, and at the same time can absorb and buffer the force generated by external contact, thereby providing good protection for the sharp mouth portion 14.

[0038] Embodiment 3:

[0039] For Example 3 of the utility model, Figure 5 , Figure 6 In addition, descriptions of parts that are not different from those in Embodiment 2 are omitted, and the same reference numerals are given.

[0040] like Figure 5 , Figure 6 As shown, the utility model relates to an improved large-bellied pipette, wherein a chamfered portion 21 is provided at the end of the protective tube sleeve 2 away from the main body 1, and the highest end position of the chamfered portion 21 is lower than the end position of the sharp mouth portion 14 to ensure that the protective tube sleeve 2 completely wraps the sharp mouth portion 14. The chamfered portion 21 can facilitate the insertion of the pipette to the bottom of the container to absorb the solution while avoiding the contact between the sharp mouth portion 14 and the bottom wall of the container, thereby ensuring that the sharp mouth portion 14 is always below the liquid surface of the solution during the process of absorbing the liquid.

[0041] Embodiment 4:

[0042] For Example 4 of the utility model, Figure 7 Note that description of parts that are not different from those in Embodiment 1 will be omitted and will be given the same reference numerals.

[0043] like Figure 7 As shown, the utility model relates to an improved large-bellied pipette, wherein the upper tube portion 11 is provided with a clamping and pushing ring block 3 arranged near its upper end to facilitate gripping and pushing; at the same time, the end of the protective tube sleeve 2 away from the main tube body 1 is provided with a chamfered portion 21, and the highest end position of the chamfered portion 21 is lower than the end position of the pointed mouth portion 14.

[0044] The clamping and pushing ring block 3 is an inverted gyro-shaped convex ring arranged on the outer side wall of the upper tube part 11, and the lower end face of the clamping and pushing ring block 3 is a plane; during specific use: before sucking the liquid and connecting it with the ear cleaning ball, the operator can grasp the clamping and pushing ring block 3 at the position of the upper tube part 11, and push against the lower end face of the clamping and pushing ring block 3 to push, so as to conveniently connect the upper tube part 11 with the ear cleaning ball; after completing the absorption of the liquid, it is necessary to remove the ear cleaning ball and block the end of the upper tube part 11 with the index finger, and at this time, other fingers can be supported on the lower end face of the clamping and pushing ring block 3, so as to improve the stability of holding and avoid the occurrence of unexpected phenomena such as slipping and falling.

[0045] The maximum outer diameter of the clamping and pushing ring block 3 is not greater than the maximum outer diameter of the middle belly portion 12 to prevent the upper tube portion 11 from tilting upward when the pipette is placed horizontally, causing the pointed mouth portion 14 to touch the table or table top, thereby causing damage to the pointed mouth portion 14.

[0046] Optionally, in some embodiments, the clamping and pushing ring block 3 and the upper tube portion 11 are in an integrated structure, so as to improve the overall toughness and stability of the clamping and pushing ring block 3 and the upper tube portion 11 .

[0047] In summary, the improved large-bellied pipette provided by the utility model can effectively avoid damage caused by the tip of the pipette touching the wall of the solution container during the process of aspirating the solution, improve the convenience and stability of the use of the large-bellied pipette, and extend the service life of the large-bellied pipette.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An improved large-bellied pipette, comprising a main body (1), the main body (1) comprising an upper tube portion (11), a middle tube portion (12), and a lower tube portion (13) connected in an integral manner, the upper tube portion (11) and the lower tube portion (13) being respectively arranged at two ends of the middle tube portion (12), and a pointed mouth portion (14) being arranged at the end of the lower tube portion (13), characterized in that: It also includes a detachable protective tube sleeve (2) which is sleeved on the outer periphery of the pointed mouth portion (14); The inner diameter of the protective tube sleeve (2) is matched to the outer diameter of the lower tube portion (13), and the length of the protective tube sleeve (2) is greater than the length of the pointed mouth portion (14), so that the pointed mouth portion (14) is completely accommodated in the cavity of the protective tube sleeve (2).

2. The improved large-bellied pipette according to claim 1, characterized in that: The cavity of the protective tube sleeve (2) is a columnar cavity, and the pointed mouth portion (14) is arranged in the columnar cavity.

3. The improved large-bellied pipette according to claim 1, characterized in that: The cavity of the protective tube sleeve (2) is an inverted conical cavity, and the conical cavity is matched with the pointed mouth portion (14) so ​​that the outer wall of the pointed mouth portion (14) is in contact with the inner wall of the protective tube sleeve (2).

4. The improved large-bellied pipette according to claim 2 or 3, characterized in that: The end of the protective tube sleeve (2) away from the main tube body (1) is provided with a chamfered portion (21), and the highest end position of the chamfered portion (21) is lower than the end position of the pointed mouth portion (14).

5. The improved large-bellied pipette according to claim 1, characterized in that: The upper tube portion (11) is provided with a clamping and pushing ring block (3), and the clamping and pushing ring block (3) is arranged close to the end of the upper tube portion (11) to facilitate gripping and pushing.

6. The improved large-bellied pipette according to claim 5, characterized in that: The clamping and pushing ring block (3) is an inverted gyro-shaped convex ring arranged on the outer side wall of the upper tube portion (11), and its lower end surface is a plane.

7. The improved large-bellied pipette according to claim 5, characterized in that: The maximum outer diameter of the clamping and pushing ring block (3) is not greater than the maximum outer diameter of the middle belly portion (12).

8. The improved large-bellied pipette according to claim 5, characterized in that: The clamping and pushing ring block (3) and the upper tube portion (11) are in an integrated structure.

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