CN201117140Y

CN201117140Y - Spring oscillator forced vibration recording type demonstration device

Info

Publication number: CN201117140Y
Application number: CNU2007200300054U
Authority: CN
Inventors: 吴峰; 吴冠群
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2008-09-17
Anticipated expiration: 2017-10-31

Abstract

The utility model discloses a recording type demonstration device which demonstrates that a spring vibrator is forced to vibrate, the device is composed of a steel ball (1), a spring (2), turning handle (3), a miniature motor (4) and a vertical supporting frame (9), wherein the steel ball (1) is fixed on the end portion of the spring (2) and vibration of the spring (2) is realized by the rotation of the miniature motor (4). The device is characterized in that a clock (11) is arranged on a left side frame of the vertical supporting frame (9), a driven roller (12) is arranged on a left side frame of the vertical supporting frame (9), one end of recording paper (13) is circled on a clock cylinder of the clock (11), the other end is circled on the driven roller (12), the lower end of the spring (2) is fixed on a recording pen (14), and the recording pen (14) is contacted with the recording paper (13). The recording type demonstration device which demonstrates that a spring vibrator is forced to vibrate not only has simple structure, but also can depict and record vibration changing curved lines, the device can calculate an experimental conclusion according to the curved lines, and the recording type demonstration device enables teaching to be more visual and can increase the teaching effect and the thinking ability of students.

Description

Spring oscillator forced vibration recording apparatus for demonstrating

Technical field

The utility model relates to a kind of physics teaching apparatus, particularly a kind of spring oscillator forced vibration recording apparatus for demonstrating.

Background technology

In physics teaching, when talking about resonance effect, in order to allow the student understand the size of vibrational waveform of oscillator forced vibration and relevant position thereof Changing Pattern intuitively along with the power frequency, in college physics teaching, requirement has corresponding physics demonstration experiment, by experiment, understands when the object forced vibration, the vibration frequency of object equals the frequency of driving force, and it doesn't matter with the natural frequency of object.When the frequency of driving force during near the natural frequency of object, the amplitude of forced vibration increases, and this phenomenon is called " resonance ".Present used forced vibration education demonstrator, by steel ball, spring, turn handle and constitute, steel ball and the spring spring oscillator that is composed of a fixed connection, crank is by driven by motor.The experimental provision of this kind structure, though structure is simple, the size of driving force is difficult to grasp, and oscillating curve can not be used record description, therefore, often causes the demonstration failure, and experimental result is undesirable.

Summary of the invention

It is a kind of not only simple in structure that the purpose of this utility model is to provide, and can be convenient to the accurate spring oscillator forced vibration recording apparatus for demonstrating of adjusting with the variation of the correct description of record oscillating curve, driving force.

For reaching above purpose, the technical scheme that the utility model adopted is: this spring oscillator forced vibration recording apparatus for demonstrating, by steel ball, spring, turn handle, micromachine constitutes, it is characterized in that steel ball is fixed on the end of spring, form spring oscillator, the upper end of its spring is fixedly connected on the slide bar, slide bar is contained in the sleeve, not askew partially with the direction that keeps the slide bar vertical movement because of turning the handle swing, the upper end of slide bar is connected with the lower end of turning handle by rotating joint, the upper end of turning handle is enclosed within on the excentric shaft of micromachine by sliding sleeve, micromachine is fixed on the crossbeam of perpendicular carriage, it is characterized in that on the left frame of perpendicular carriage, establishing clock, establish passive transfer roller on the left frame of perpendicular carriage, an end of recording chart is on the clock tube of clock, and the other end is on passive transfer roller, fix recording pointer in the lower end of spring, recording pointer contacts with recording chart.The utility model is also implemented by following measure: described clock can be a slowspeed machine, be provided with the clock tube in the outside of slowspeed machine, slowspeed machine can be designed to one minute 12 week of commentaries on classics, diameter according to clock clock tube, can calculate the speed that recording chart is walked, thereby extrapolate unit interval internal vibration number of times, and on recording chart, mark oscillating curve and time relation figure; On micromachine, also establish speed regulator, thereby regulate the rotating speed of micromachine; Described recording pen, constitute by penholder, nib and ink container, its nib is toothed arc, when steel ball deflects in spring vibration, the tooth of nib can have a contact history paper all the time, be provided with gutter channel on the upper face of nib, an end of gutter channel is connected with ink container, and the other end extends the arc edge of nib.

The beneficial effects of the utility model are: compare with the spring oscillator forced vibration apparatus for demonstrating of using always in teaching at present, not only simple in structure, and can describe and write down the vibration change curve, and can be according to its experiment conclusion of curve calculation, make teaching more directly perceived, can improve teaching efficiency, improve student's thinking ability.

Description of drawings

Fig. 1 is the utility model structure front-view schematic diagram.

Fig. 2 is the utility model recording pointer schematic top plan view.

Embodiment

Make the utility model with reference to accompanying drawing 1,2.This spring oscillator forced vibration recording apparatus for demonstrating, by steel ball 1, spring 2, turn handle 3, micromachine 4 constitutes, it is characterized in that steel ball 1 is fixed on the end of spring 2, form spring oscillator, the upper end of its spring 2 is fixedly connected on the slide bar 5, slide bar 5 is contained in the sleeve pipe 16, the upper end of slide bar 5 is connected with the lower end of turning handle 3 by rotating joint 6, the upper end of turning handle 3 is enclosed within on the excentric shaft 8 of micromachine 4 by sliding sleeve 7, micromachine 4 is fixed on the crossbeam 10 of perpendicular carriage 9, it is characterized in that on the left frame of perpendicular carriage 9, establishing clock 11, establish passive transfer roller 12 on the left frame of perpendicular carriage 9, an end of recording chart 13 is on the clock tube of clock 11, and the other end is on passive transfer roller 12, fix recording pointer 14 in the lower end of spring 2, recording pointer 14 contacts with recording chart 13.Described clock 11 can be a slowspeed machine, is provided with the clock tube in the outside of slowspeed machine, and slowspeed machine can be designed to one minute 12 week of commentaries on classics; On micromachine 4, also establish speed regulator 15, thereby regulate the rotating speed of micromachine 4; Described recording pen 14, constitute by penholder 14a, written 14b and ink container 14c, its written 14b is toothed arc, when steel ball in spring vibration 1 deflects, the tooth of nib 14b can have a contact history paper 13 all the time, be provided with gutter channel 14d on the upper face of written 14b, the end of gutter channel 14d is connected with ink container 14c, and the other end extends the arc edge of written 14b.

Claims

1, a kind of spring oscillator forced vibration recording apparatus for demonstrating, by steel ball (1), spring (2), turn handle (3), micromachine (4) constitutes, steel ball (1) is fixed on the end of spring (2), the upper end of its spring (2) is fixedly connected on the slide bar (5), slide bar (5) is contained in the sleeve pipe (16), the upper end of slide bar (5) is connected with the lower end of turning handle (3) by rotating joint (6), the upper end of turning handle (3) is enclosed within on the excentric shaft (8) of micromachine (4) by sliding sleeve (7), micromachine (4) is fixed on the crossbeam (10) of perpendicular carriage (9), it is characterized in that on the left frame of perpendicular carriage (9), establishing clock (11), on the left frame of perpendicular carriage (9), establish passive transfer roller (12), one end of recording chart (13) is on the clock tube of clock (11), the other end is on passive transfer roller (12), the fixing recording pointer (14) of going up in the lower end of spring (2), recording pointer (14) contacts with recording chart (13).

2, spring oscillator forced vibration recording apparatus for demonstrating according to claim 1, it is characterized in that described recording pen (14), constitute by penholder (14a), nib (14b) and ink container (14c), its nib (14b) is toothed arc, on the upper face of nib (14b), be provided with gutter channel (14d), one end of gutter channel (14d) is connected with ink container (14c), and the other end extends the arc edge of nib (14b).