CN210675247U

CN210675247U - Piston type dropper for science experiments

Info

Publication number: CN210675247U
Application number: CN201921343566.9U
Authority: CN
Inventors: 张家豪
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-06-05
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a piston burette for physical education science experiments in experiment teaching aid field, including the burette body, inside piston and the piston rod of being equipped with of burette body, tailpiece of the piston rod is equipped with the base block, and base block lateral wall both sides are rotated fixedly and are equipped with the push rod, are equipped with a set of elastic rod between push rod and the burette body lateral wall, and the tip of two elastic rods is fixed respectively on push rod and burette body lateral wall, are fixed with the lantern ring on another tip of elastic rod and overlap in the adjacent elastic rod outside, are printed on the elastic rod and are carved with the scale. The utility model discloses can increase the scale and make the student observe the actual drippage condition of reagent, the control of being more convenient for to the burette body is inside through piston shutoff burette body upper end, liquid medicine pollution rubber cap when can preventing the burette from invering.

Description

Piston type dropper for science experiments

Technical Field

The utility model relates to an experiment teaching aid field, concretely relates to piston burette for science experiments.

Background

In high school learning, the chemical disciplines not only need the learning of theoretical knowledge, but also often involve a large number of experimental courses. The experimental course is mainly set for deepening the knowledge of students, and the students can more deeply master and apply the learned knowledge by matching with the experimental result, and the experiment can stimulate the learning interest of the students, cultivate the intelligence and the practical ability of the students and has important significance.

In chemical experiments, drip irrigation is often required, and the drip irrigation can be used as an instrument for sucking and dripping a small amount of liquid reagent and is generally composed of a rubber cap and glass. When the reagent bottle is used, the rubber cap is squeezed by a thumb, the reagent in the dropper is drained, the glass tip of the dropper is extended into the reagent bottle, and the thumb is released to suck the reagent into the dropper. When the device is used, the thumb presses the rubber cap, the reagent is extruded out of the dropper by air pressure, and the test is carried out. The dropper can not be placed upside down when the dropper is internally filled with the reagent so as to prevent the reagent from polluting the rubber cap, and for students, the amount of the reagent dripped by the dropper can not be well controlled during experiments, so that the reaction result is inaccurate, and the experimental reaction process can not be well understood.

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

To the problem among the prior art, the utility model provides a piston burette for science experiments can increase the scale and make the student observe the actual drippage condition of reagent, the control of being more convenient for.

Technical scheme

The utility model discloses a following technical scheme realizes:

the utility model provides a piston burette for science experiments, includes the burette body, burette body inside is equipped with piston and piston rod, the piston rod tip is equipped with the base block, base block lateral wall both sides are rotated fixedly and are equipped with the push rod, the push rod with be equipped with a set of elastic rod between the burette body lateral wall, the tip of two elastic rods is fixed respectively the push rod with on the burette body lateral wall, be fixed with the lantern ring on another tip of elastic rod and overlap adjacent the elastic rod outside, the scale has been carved with on the elastic rod.

Further, the end of the push rod is provided with a rubber ball.

Furthermore, a handle knob is fixed on the outer side wall of the dropper tube body below the elastic rod.

Furthermore, scale marks are printed on the side wall of the dropper tube body.

Further, a cover plate is arranged at the upper end of the dropper pipe body, and the piston rod is inserted into the cover plate.

Advantageous effects

Adopt the utility model provides a technical scheme compares with known public technique, has following beneficial effect:

the utility model provides a piston burette for science experiments can increase the scale and make the student observe the actual drippage condition of reagent, the control of being more convenient for to burette body is inside through piston shutoff burette body upper end, liquid medicine pollution rubber cap when can preventing the burette from invering.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

the reference numbers in the figures are: 1-dropper tube; 2-a piston; 3-a base block; 4-a push rod; 5-an elastic rod; 6-a collar; 7-a graduated scale; 8-rubber ball; 9-handle knob; 10-cover plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. 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.

The present invention will be further described with reference to the following examples.

Embodiment 1, combine fig. 1-2, a piston burette for clinical laboratory, including burette body 1, burette body 1 is inside to be equipped with piston 2 and piston 2 pole, 2 pole tip portions on the piston are equipped with base block 3, 3 lateral wall both sides of base block are rotated fixedly and are equipped with push rod 4, be equipped with a set of elastic rod 5 between push rod 4 and the burette body 1 lateral wall, the tip of two elastic rod 5 is fixed respectively on push rod 4 and burette body 1 lateral wall, be fixed with lantern ring 6 and overlap in the adjacent elastic rod 5 outside on another tip of elastic rod 5, scale 7 is carved with on the elastic rod 5.

Preferably, in order to facilitate the operation of the push rod 4, the end of the push rod 4 is provided with a rubber ball 8.

Preferably, in order to facilitate the operation of the dropper tube 1, a handle 9 is fixed on the outer side wall of the dropper tube 1 below the elastic rod 5.

Preferably, in order to facilitate the observation of the amount of the reagent inside the dropper tube 1, scale lines are marked on the side wall of the dropper tube 1.

Preferably, the upper end of the dropper tube 1 is provided with a cover plate 10, and the piston 2 is inserted into the cover plate 10.

The utility model discloses an application principle does: the middle finger and the ring finger are used for clamping the pipe wall or a pinch handle 9 of the dropper pipe body 1, the thumb and the forefinger are placed below two push rods 4, the push rods 4 are respectively pushed upwards to enable the piston 2 to move downwards to the bottom, then the dropper head at the bottom of the dropper pipe body 1 extends into the reagent, the thumb and the forefinger move above the push rods 4, the push rods 4 are respectively pressed downwards to enable the piston 2 to move upwards, and the reagent is extracted into the dropper pipe body 1.

After the dropper tube body 1 is internally filled with the reagent, the thumb and the index finger are changed and moved to the lower part of the push rod 4, the push rod 4 is extruded towards the inner side, the piston 2 moves towards the lower side when the push rod 4 is extruded, the reagent is pushed out, in addition, when the push rod 4 moves towards the inner side, the lantern ring 6 at the end part of the elastic rod 5 fixed on the lower part of the push rod 4 moves on the other adjacent elastic rod 5, the lantern ring 6 on the other elastic rod 5 also moves on the elastic rod 5, and because the graduated scale 7 is arranged on the elastic rod 5, the extruding distance of the push rod 4 towards the inner side can be displayed on the graduated scale 7, and the students can conveniently observe and control the extruding distance of the push rod.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the specific implementations of the invention. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a piston burette for science experiments which characterized in that: including burette body (1), burette body (1) is inside to be equipped with piston (2) and piston (2) pole, piston (2) rod end portion is equipped with base block (3), base block (3) lateral wall both sides are rotated fixedly and are equipped with push rod (4), push rod (4) with be equipped with a set of elastic rod (5) between burette body (1) lateral wall, the tip of two elastic rod (5) is fixed respectively push rod (4) with on burette body (1) lateral wall, be fixed with lantern ring (6) and cover adjacent on another tip of elastic rod (5) the elastic rod (5) outside, scale (7) have been carved with on elastic rod (5).

2. The piston type dropper for clinical laboratory according to claim 1, wherein: the end part of the push rod (4) is provided with a rubber ball (8).

3. The piston type dropper for clinical laboratory according to claim 1, wherein: a handle (9) is fixed on the outer side wall of the dropper tube body (1) below the elastic rod (5).

4. The piston type dropper for clinical laboratory according to claim 1, wherein: scale marks are marked on the side wall of the dropper tube body (1).

5. The piston type dropper for clinical laboratory according to claim 1, wherein: the upper end of the dropper tube body (1) is provided with a cover plate (10), and the piston (2) is inserted into the cover plate (10).