CN202976611U

CN202976611U - Buoyancy direction demonstrating instrument

Info

Publication number: CN202976611U
Application number: CN 201220696033
Authority: CN
Inventors: 师海满
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2013-06-05
Anticipated expiration: 2022-12-11

Abstract

The utility model relates to a buoyancy direction demonstrating instrument which comprises a water tank, a floater and a heavy hammer line. Hanging rings are disposed at the inner bottom of the water tank. The floater is provided with a pulling line and the heavy hammer line. The buoyancy direction demonstrating instrument is simple in structure and low in manufacturing cost. The problems that students cannot understand and is confused with the physical phenomenon that the buoyancy direction is always vertically upward and the existing demonstrating instruments are lack of visual demonstration in buoyancy direction teaching are solved.

Description

The buoyancy direction demonstration instrument

Technical field

The utility model relates to a kind of teaching aid, relates in particular to the buoyancy direction demonstration instrument

Background technology

At present, in the teaching of junior physics buoyancy direction, the student is " making progress " this understanding aspect to the direction that the direction of buoyancy always is confined to buoyancy.To the direction " straight up " of buoyancy, even " straight up always " understanding is not saturating, exists and feels uncertain, and lack its ocular demonstration in existing teaching demonstration instrument.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of demonstrator simple, with low cost, easy and simple to handle, capable of dynamic ocular demonstration liquid buoyancy direction of making.

For addressing the above problem, buoyancy direction demonstration instrument described in the utility model, this demonstrator comprises the rectangular parallelepiped tank, link, float, weight line and bracing wire is characterized in that:

Be provided with fixedly link at the bottom of described tank, on described float, the other end of bracing wire is fixed on described link.

Be provided with simultaneously described weight line and bracing wire on described float.

The utility model compared with prior art has the following advantages:

1, link together due to the novel middle float of this use and weight line, and be provided with fixedly bracing wire, can be in dynamically the direction of the existence of ocular demonstration buoyancy and buoyancy this basic physical phenomenon that makes progress.

2, owing to being provided with simultaneously described weight line and bracing wire on float in the utility model, can the direction of ocular demonstration buoyancy be " straight up " and " straight up always " in dynamically, effectively solve the doubt that exists in Students ' Learning and do not understand, breaking through teaching difficulty.

3, the utility model is made simple, cheap; Slight instrument has solved long-term puzzlement teachers and students' a teaching difficulty.

Description of drawings

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.

Fig. 1 is structural representation of the present utility model.

In figure: 1-tank 2-link 3-float 4-weight line 5-bracing wire

Fig. 2 is the explanation schematic diagram of Preparatory work of experiment state.

Fig. 3 is that demonstrating floating force existence and buoyancy direction are explanation schematic diagram straight up.

Fig. 4 is direction straight up the explanation schematic diagram always of demonstrating floating force.

Embodiment

As shown in Figure 1, the buoyancy direction demonstration instrument, this demonstrator comprises tank 1, link 2, float 3, weight line 4 and bracing wire 5.

Embodiment 1

(1) in tank not before injected water, float drops on bottom of gullet (as Fig. 2) because of Action of Gravity Field

(2) in tank after injected water, float floats, and stretching weight line and bracing wire illustrate that float is subject to buoyancy (as Fig. 3) upwards.

(3) observe be the position relationship of bracing wire and weight line of float be parallel, the direction of known gravity is straight down, the direction that buoyancy is described is exactly (as Fig. 3) straight up.

When (4) tank being tilted to either direction, the position relationship of float in water (tank) occurs relatively to change, but be the position relationship keeping parallelism always of the bracing wire of float and weight line by observation, the direction that buoyancy is described is straight up (Fig. 4) always.

Claims

1. buoyancy direction demonstration instrument, this demonstrator comprises rectangular parallelepiped tank (1), link (2), float (3), weight line (4) and bracing wire (5), it is characterized in that: described tank (1) end, be provided with described fixedly link (2), and the other end of the above bracing wire of described float (3) (5) is fixed on described link (2).

2. buoyancy direction demonstration instrument as claimed in claim 1, is characterized in that: be provided with simultaneously described weight line (4) and bracing wire (5) on described float (3).