CN217042654U - Leak-proof dropper - Google Patents

Abstract

The utility model provides a leakage-proof dropper, which comprises a dropper and a pipette in threaded connection with the dropper, wherein the dropper comprises a connecting part and a clamping part arranged at the periphery of the connecting part, the clamping part is connected at one end close to the connecting part towards the pipette, the inner wall of the clamping part and the outer wall of the connecting part form an annular accommodating groove, and the clamping part is arranged on the side wall of the accommodating groove and is provided with a glue position; the inner circumference of the clamping portion is provided with an internal thread, and the glue position is located at one end, close to the accommodating groove, of the internal thread. The liquid suction pipe comprises a clamping joint and a liquid suction part, and the liquid suction part, the clamping joint and the flow channel of the connecting part are communicated in sequence; and an external thread matched with the internal thread is arranged on the outer peripheral side of the clamping head. The annular accommodating groove is used for accommodating the end part of the clamping joint.

Description

Leak-proof dropper

Technical Field

The utility model relates to a burette field, in particular to leak protection burette.

Background

A special-shaped bottle dropper on the market is easy to cause liquid leakage risk if sealing performance is poor due to the fact that negative pressure environment exists in air transportation in the process of filling liquid transportation.

In view of the above, how to improve the leakage-proof function of the dropper of the special-shaped bottle is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a leak protection burette.

The utility model aims to solve the problem that the prior special-shaped bottle dropper is easy to leak liquid.

In order to solve the problem, the utility model discloses a following technical scheme realizes:

a leak-proof dropper comprises a dropper and a pipette connected with the dropper in a threaded manner, wherein the dropper comprises a connecting portion and a clamping portion arranged on the periphery of the connecting portion, the clamping portion is connected to one end, close to the connecting portion, facing the pipette, the inner wall of the clamping portion and the outer wall of the connecting portion form an annular accommodating groove, and the clamping portion is located on the side wall of the accommodating groove and is provided with a glue position; the inner circumference of the clamping part is provided with an internal thread, and the glue position is positioned at one end of the internal thread close to the accommodating groove; the liquid suction pipe comprises a clamping head and a liquid suction part, and the liquid suction part, the clamping head and the flow channel of the connecting part are communicated in sequence; an external thread matched with the internal thread is arranged on the outer peripheral side of the clamping head; the annular accommodating groove is used for accommodating the end part of the clamping joint.

Furthermore, the glue position is an arc-shaped bulge facing to the axis direction of the clamping part.

Furthermore, one side of the clamping joint, which is far away from the liquid absorbing part, is provided with a rubber ring.

Further, the upper end thickness of the rubber ring is 1/2-2/3 of the lower end thickness of the rubber ring; the upper end of the rubber ring is the end of the rubber ring facing the dripper, and the lower end of the rubber ring is the end of the rubber ring connected with the clamping head.

Further, the thickness of the lower end of the rubber ring is greater than 1/5 and less than 1/3 of the thickness of the clamping head.

Further, the rubber ring is close to the inner wall of the clamping head.

Furthermore, a marking block is arranged between the clamping joint and the liquid suction part.

Further, the end of the connection portion facing the pipette is provided with a fillet.

Compared with the prior art, the utility model discloses technical scheme and beneficial effect as follows:

(1) the utility model discloses a leak protection burette is provided with at the inner wall that joint position in the storage tank and is the bellied glue position of arc, prevents that the tip card of connecting portion from going into the port of joint and making the port of joint open to the leakproofness of the junction of dripper and pipette has been ensured.

(2) The utility model discloses a leak protection burette is provided with the rubber ring at the tip of the inseparable butt of joint head and storage tank, through the extension of rubber ring atress towards both sides deformation to realize that the up end of rubber ring closely laminates with the bottom surface of storage tank, effectively blocked the route that liquid was revealed from the junction of dripper and pipette, improved the leakproofness of burette.

(3) The utility model discloses a vertical section of rubber ring is under narrow width trapezoidal, and the rubber ring is lighter than the thickness of joint lateral wall at burette radial ascending thickness for extension when the rubber ring receives the extrusion is enough, with the tank bottom of ensureing the whole laminating storage tanks of up end of rubber ring, thereby has improved the leakproofness of burette.

(4) The utility model discloses a pipette is provided with the mark fast between joint head and imbibition portion to confirm fast whether the assembly of dripper and pipette targets in place, improved assembly efficiency and accuracy.

Drawings

FIG. 1 is a schematic diagram of a leak-proof dropper according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a dripper according to the embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a structural view of a pipette provided in an embodiment of the present invention;

fig. 5 is an enlarged view of fig. 4 at B.

Illustration of the drawings:

drippers-100; a connecting part-110; a clamping part-120; glue sites-121; an internal thread-122; a receiving groove-130;

pipette-200; a clamping connector-210; rubber ring-211; external threads-212; a liquid suction part-220; block-230 is marked.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 5, an anti-leakage dropper includes a dropper 100 and a pipette 200 screwed to the dropper 100, wherein the dropper 100 includes a connection portion 110 and a locking portion 120 disposed at an outer periphery of the connection portion 110, and the connection portion 110 is used for connecting a rubber head (not shown). The joint portion 120 is connected at the one end that is close to connecting portion 110 towards pipette 200, the joint, and the annular containing groove 130 is formed with the outer wall of connecting portion 110 to the inner wall of 120, and the lateral wall that joint portion 120 is located containing groove 130 is provided with glues position 121, and the inner circumference of joint portion 120 is provided with internal thread 122, glues position 121 and is located the one end that internal thread 122 is close to containing groove 130. The pipette 200 includes a clamping head 210 and a liquid suction part 220, the clamping head 210 and the flow channel of the connection part 110 are sequentially communicated, an external thread 212 matched with the internal thread 122 is arranged on the outer periphery of the clamping head 210, and the annular accommodating groove 130 is used for accommodating the end part of the clamping head 210.

During assembly, the end part of the clamping head 210 is aligned to the end part of the clamping part 120 far away from the connecting part 110 and clamped in, the pipette 200 is rotated, the external thread 212 is matched with the internal thread 122 to rotate, the clamping head 210 of the pipette 200 is gradually clamped in the clamping part 120 of the dropper 100 until the end part of the clamping head 210 is clamped in the accommodating groove 130, at the moment, the end part of the connecting part 110 is clamped in the end part of the clamping head 210, so that the port of the clamping head 210 tends to be opened, liquid is likely to leak from the end part of the clamping head 210, the glue position 121 is arranged on the inner wall of the clamping part 120, the outside of the port of the clamping head 210 is effectively wrapped, and leakage of the liquid is prevented.

In this embodiment, the glue position 121 is an arc-shaped protrusion facing the axis direction of the clamping portion, the height of the glue position 121 relative to the protrusion on the inner wall of the clamping portion is h, and h is equal to or slightly less than the height of the teeth of the internal thread, so that when the dropper 100 and the pipette 200 are screwed, the clamping head 210 and the accommodating groove 130 are combined more and more tightly, thereby increasing the sealing performance of the product. The end of the connection portion 110 facing the pipette 200 is provided with a rounded corner to facilitate smooth snapping of the end of the connection portion 110 into the port of the bayonet joint 210.

Referring to fig. 4 and 5, a rubber ring 211 is disposed on a side of the bayonet joint 210 away from the liquid suction portion 220, that is, in the process of screwing the dropper 100 and the liquid suction tube 200, the rubber ring 211 moves toward the bottom of the receiving groove 130 until the rubber ring 211 is tightly attached to the bottom of the receiving groove 130, the bottom of the receiving groove 130 presses the rubber ring 211, the rubber ring 211 has ductility and stretches toward both sides of the force direction during pressing until the upper end surface of the rubber ring 211 completely attaches to the bottom of the receiving groove 130, so as to effectively prevent liquid from leaking from the connection between the dropper 100 and the liquid suction tube 200.

In this embodiment, the thickness of the upper end surface of the rubber ring 211, i.e., the end facing the dropper 100, is W, the thickness of the lower end surface of the rubber ring 211, i.e., the end connected to the bayonet joint 210, is W, and the thickness W of the upper end of the rubber ring 211 is 1/2 to 2/3 of the thickness W of the lower end thereof, i.e., the vertical cross section of the rubber ring is a trapezoid with a narrow top and a wide bottom. Therefore, the upper end face of the rubber ring 211 is more easily extended, the comprehensive fit between the upper end face of the rubber ring 211 and the bottom of the accommodating groove 130 is ensured, and the leakage-stopping effect of the rubber ring 211 is improved. The height H of the rubber ring 211 in the axial direction of the dropper is less than 1mm, and the rubber ring is a thin rubber ring with variable force.

The thickness W of the lower end of the rubber ring is greater than 1/5 of the thickness of the card connector 210 and less than 1/3 of the thickness of the card connector 210, which ensures the ductility of the rubber ring when compressed. The rubber ring is adjacent to the inner wall of the bayonet fitting, sealing the liquid in the flow path of the pipette 200.

In the embodiment, the marking block 230 is further arranged between the connecting head 210 and the liquid suction part 220, so that whether the liquid suction pipe and the dropper are assembled in place or not can be clearly and quickly determined during assembly, and the sealing performance of the dropper is further ensured.

The utility model discloses an inner wall that joint portion is located the storage tank is provided with glues position 121, is provided with rubber ring 211 at the tip of joint head with the storage tank butt, and the leakproofness in transportation and the use has been ensured to the burette that prevents under the double pipe is neat and pipette junction weeping, whether targets in place through the quick 230 quick definite assemblies of mark to further the leakproofness of pipette has been ensured.

While the above description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the invention as expressed in the above teachings or as determined by the knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A leak-proof dropper comprises a dropper and a pipette which is connected with the dropper through threads, and is characterized in that,

the dripper comprises a connecting part and a clamping part arranged on the periphery of the connecting part, the clamping part is connected to one end, which is close to the connecting part and faces the pipette, the inner wall of the clamping part and the outer wall of the connecting part form an annular accommodating groove, and the clamping part is positioned on the side wall of the accommodating groove and is provided with a glue position; the inner circumference of the clamping part is provided with an internal thread, and the glue position is positioned at one end of the internal thread close to the accommodating groove;

the liquid suction pipe comprises a clamping head and a liquid suction part, and the liquid suction part, the clamping head and the flow channel of the connecting part are communicated in sequence; an external thread matched with the internal thread is arranged on the outer peripheral side of the clamping head;

the annular accommodating groove is used for accommodating the end part of the clamping joint.

2. The leak-proof dropper of claim 1 wherein the glue portion is a circular arc protrusion extending toward the axis of the engaging portion.

3. The leak-proof dropper of claim 1, wherein a rubber ring is disposed on a side of the snap joint away from the liquid sucking part.

4. The leak-proof dropper of claim 3 wherein the rubber ring has an upper end thickness between 1/2 and 2/3 of a lower end thickness; the upper end of the rubber ring is the end of the rubber ring facing the dripper, and the lower end of the rubber ring is the end of the rubber ring connected with the clamping head.

5. The leak-proof dropper of claim 4, wherein the rubber ring has a lower end with a thickness greater than 1/5 and less than 1/3 of the thickness of the snap joint.

6. The leak-proof dropper of claim 5 wherein the rubber ring is adjacent to an inner wall of the bayonet.

7. The leak-proof dropper of claim 1, wherein a marking block is disposed between the locking joint and the liquid suction portion.

8. The leak-proof dropper of claim 1, wherein the connection portion is provided with a rounded corner toward the end of the pipette.

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