CN217725594U - Head dropper - Google Patents

Abstract

The utility model belongs to the technical field of the instrument, especially, be a head burette, including the burette shell with be located burette shell bottom thread bush and burette shell and thread bush fixed, thread bush's surface threaded connection burette head, the bottom of burette shell is fixed with the packing ring that is used for space between sealed thread bush and the burette head, the inside of dripping the pipe is equipped with the extension bar, the inside rubber circle that is used for sealing up the space between burette shell and the extension bar that is fixed with of burette shell, the extension bar slides with the rubber circle, the fixed hollow rubber head in top of rubber circle. The utility model discloses a sliding connection between extension bar and the rubber circle, the fixed connection of extension bar and extension bar, pulling extension bar for the extension bar is driven by the extension bar and is slided, through extension bar and spacing ring fixed connection, when spacing ring and rubber circle joint, stops the pulling extension bar, and the part extension bar that lies in the inside of drip tube shell this moment will stretch to the top of drip tube shell, and the burette after the extension alright in order to facilitate the use.

Description

Head dropper

Technical Field

The utility model relates to the technical field of instruments, in particular to a head dropper.

Background

In biology and chemistry experiments, the dropper is indispensable, the use frequency is extremely high, the dropper has the advantages of small transfer amount, convenience and lightness in use and the like, most of droppers on the market are simple in structure at present, so that the dropper has a single function and cannot meet diversified use requirements.

The prior head dropper has the following problems:

1. when the bottle neck of a container for containing liquid is longer or the distance between the liquid level and the flat port is larger, the length of the dropper is not enough, so that the liquid is inconvenient to take;

2. the dropper can not be used in a crossed way in the face of different reagents, and the dropper is inconvenient to clean due to the narrow suction port.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a head dropper, which solves the problems of inconvenient adjustment and inconvenient cleaning of the length of the dropper in the prior art.

The second technical proposal.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides a head burette, includes the burette shell and is located burette shell bottom thread bush and drips the pipe shell and thread bush is fixed, thread bush's surface threaded connection burette head, the bottom of dripping the pipe shell is fixed with the packing ring that is used for sealed thread bush and burette head between the space, the inside of dripping the pipe shell is equipped with the extension bar, drip the inside rubber circle that is used for sealed space between pipe shell and the extension bar that is fixed with of pipe shell, the extension bar slides with the rubber circle, the fixed hollow rubber head in top of rubber circle.

Furthermore, a limiting ring is fixed at one end of the extension bar and is clamped with the rubber ring.

Furthermore, an extension bar is fixed with an extension ring on the outer surface.

Further, the extension bar is hollow inside.

(III) advantageous effects

Compared with the prior art, the utility model provides a head burette possesses following beneficial effect:

1. the utility model discloses, through the sliding connection between extension bar and the rubber circle, the fixed connection of extension bar and extension bar stimulates the extension bar for the extension bar is driven to slide by the extension bar, through extension bar and spacing ring fixed connection, when spacing ring and rubber circle joint, stops to stimulate the extension bar, and the partial extension bar that lies in the inside of drip tube this moment will stretch to the top of drip tube, drip tube alright after the extension in order to facilitate the use.

2. The utility model discloses, through dropping the tube head and threaded connection of threaded sleeve, anticlockwise rotation drops the tube head alright dismantle the burette head, can directly wash the inside of burette shell and burette head with the distilled water at this moment.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the present invention;

FIG. 2 is a schematic front view of the present invention;

fig. 3 isbase:Sub>A sectional view of the structure atbase:Sub>A-base:Sub>A in fig. 2 according to the present invention.

In the figure: 1. a dropper shell; 2. a threaded bushing; 3. a dropper head; 4. a gasket; 5. lengthening a rod; 6. a rubber ring; 7. a hollow rubber head; 8. a limiting ring; 9. and (5) pulling the ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1, 2 and 3, the utility model discloses a first burette that embodiment provided, including the burette shell 1 with be located burette shell 1 bottom thread bush 2 and burette shell 1 and thread bush 2 fixed, the surface threaded connection burette head 3 of thread bush 2, the bottom of burette shell 1 is fixed with the packing ring 4 that is used for sealed thread bush 2 and burette head 3 between the space, the inside of burette shell 1 is equipped with extension bar 5, burette shell 1 is inside to be fixed with and to be used for sealed rubber ring 6 that drips the space between shell 1 and the extension bar 5, extension bar 5 slides with rubber ring 6, the fixed hollow rubber head 7 in top of rubber ring 6, through anticlockwise rotation burette head 3 alright dismantle burette head 3, through the sliding connection between extension bar 5 and the rubber ring 6, pulling extension bar 5 makes the burette extension.

In some embodiments, as shown in figure 3, a stop collar 8 is fixed to one end of the extension bar 5, the stop collar 8 is snap-fitted to the rubber ring 6, and the extension bar 5 is prevented from being detached from the drip chamber 1 by the stop collar 8.

As shown in fig. 1, in some embodiments, an extension bar 5 is externally fixed with an extension ring 9, and the extension bar 5 can be conveniently pulled by the extension ring 9.

In some embodiments, as shown in figure 3, the extension rod 5 is hollow inside, and the hollow tube body allows the hollow rubber head 7 to communicate with the drip chamber housing 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a head burette, includes burette shell (1) and is located burette shell (1) bottom thread bush (2) and burette shell (1) and thread bush (2) fixed, its characterized in that: the outer surface threaded connection burette head (3) of threaded sleeve (2), the bottom of burette shell (1) is fixed with packing ring (4) that are used for sealed threaded sleeve (2) and burette head (3) between the space, the inside of dripping pipe shell (1) is equipped with extension bar (5), drip pipe shell (1) inside be fixed with be used for sealed rubber circle (6) that drip the space between pipe shell (1) and extension bar (5), extension bar (5) slide with rubber circle (6), hollow rubber head (7) are fixed on the top of rubber circle (6).

2. A head dropper according to claim 1, wherein: spacing ring (8) is fixed to the one end of extension bar (5), spacing ring (8) and rubber ring (6) joint.

3. A head dropper according to claim 1, wherein: an extension bar (5) is fixed with an extension ring (9) on the outer surface.

4. A head dropper according to claim 1, wherein: the interior of the extension bar (5) is hollow.

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