CN201047219Y

CN201047219Y - Magnetic affecting automatic peed-reducing device

Info

Publication number: CN201047219Y
Application number: CNU2007200797989U
Authority: CN
Inventors: 吴光武; 杨丽鸽; 严明
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2007-06-01
Filing date: 2007-06-01
Publication date: 2008-04-16
Anticipated expiration: 2017-06-01

Abstract

The utility model relates to a magnetic induction automatic slow down device which automatically retards the velocity of the movement of a facade when a door is closed based on the electromagnetic induction theory. The utility model consists of a magnetic bar, an inductive closing coil and a iron sheet, and is characterized in that the magnetic bar is vertical to the facade and is arranged on the edge of the contacting surface of the facade and a doorframe; the inductive closing coil is internally embedded in the contacting surface of the doorframe and the facade; the circular iron sheet is arranged at the bottom part of the closing coil and a diameter of the iron sheet is the same as the size of the closing coil. When the door is closed, the magnet stick at the edge of the facade is approaching to the closing coil on the doorframe, and according to the Lenz law principle the direction of the magnetic field aroused by the induced current generated by the closing coil is opposite to that of a magnetic induction line of magnet stick, thereby hindering the magnetic bar from advancing to reach the purpose of speed-down. The utility model has the advantages of simple principle and structure, convenient installation, obvious effect, no extra power requirement, and is suitable for being used such places as various classes, offices, meeting rooms and household doors and windows.

Description

The magnetic strength automatic slow-down device

Technical field

The utility model relates to a kind of magnetic strength automatic slow-down device that can utilize the automatic reducing speed of electromagnetic induction principle, refers in particular to be installed in to play the device that slows down shop front movement velocity automatically on shop front edge and the doorframe.

Background technology

Along with the development of society, people require more and more higher to operating efficiency, and people also progressively improve the office work environment requirement, especially need to guarantee a quiet harmonious working environment.Below lift two negative examples:

1: in a full classroom of sitting, a distinguished professor be more than 100 student on class, at this moment come a gust of wind suddenly, tight the door lock of originally opening rapidly, send simultaneously " bang " a loud noise.Classmates have stopped and have write, and professor has been interrupted thinking with also frightening.Spent a few minutes again, a student has been arranged because late and knock at the door outside and illustrate teacher to open the door in the past, at this moment teacher's thinking has been interrupted again

2: now a lot of offices all are equipped with air-conditioning, and the work hours generally all close the door, and the door in a lot of rooms is not installed handle outside.When the outside had the people to knock at the door, the people in the room must get up in person for the people of outside opens the door, and will certainly cause very big time waste like this.

At present a lot of classroom doors or office door are because its feature structure causes them can not avoid bringing some beyond thought noise and interference, such as above-mentioned several situations, and if the shop front can cause the doorframe and the shop front all to be easy to damage with very big speed and doorframe spray collision for a long time.

People also solve these problems by the whole bag of tricks.Popularly on our market now be used to slow down at closing time that the device of the movement velocity of the shop front generally has the spring reducer, the air pressure deceleration device, but because himself design feature exists DeGrain, complex structure, drawback such as cost an arm and a leg, be unfavorable for promoting.

Summary of the invention

The purpose of this utility model is: in order to overcome existing door in that shop front noise that rapid movement causes is big at closing time, to deficiencies such as the shop front and doorframe breakages, the spy provides a kind of magnetic strength automatic slow-down device.

In order to reach above-mentioned technical purpose, the utility model proposes following technical scheme: a kind of magnetic strength automatic slow-down device, mainly be made up of bar magnet, induction closing coil, iron plate, its structure is: bar magnet is installed on the shop front and the doorframe contact surface edge perpendicular to the shop front; The induction closing coil is embedded on the contact surface of the doorframe and the shop front, the length of induction closing coil and the equal in length of shop front external magnet rod; Round iron plate is installed in the closing coil bottom, and its diameter equals the size of closing coil.Wherein the bar magnet specification is diameter 1cm, and the length outside the shop front is 1.5cm, and distance is 2cm between per two bar magnets; The closing coil material adopts copper wire, and its length is 1.5cm; The iron plate diameter is 1cm, and thickness is 3mm.

The course of work of the present utility model is as follows: the shop front (bar magnet) is close to doorframe (closing coil) with certain speed under external force, and is when the bar magnet on the shop front during very near coil, can approximately equivalent coaxial in bar magnet and closing coil.According to Lenz's law as can be known closing coil can produce with the rightabout magnetic induction line of bar magnet and advance to hinder bar magnet, and such relation is arranged: the bar magnet motion is fast more, magnetic flux change by closing coil is just fast more, the opposite direction magnetic line of force that closing coil produces is also many more, and the reaction force of generation is also just big more.The movement velocity that is the shop front is big more, and it is also big more to hinder the power of advancing in front of the door.

When bar magnet entered closing coil fully, this moment, the movement velocity of the shop front was reduced.Rate of change by the coil flux amount is also almost nil, and reaction force also is reduced to zero thereupon thus.At this moment door relies on the power that attracts each other of bar magnet and bar magnet bottom iron plate lightly door to be shut again.The shop front is just kept the state of closing the door under bar magnet and coil bottom iron plate adelphotaxy, when door under certain external force effect (pushing), as long as this power just can be opened door greater than the magnetic force between the bar magnet iron plate such as someone outdoors.

The beneficial effects of the utility model are: this deceleration device can make the shop front movement velocity of rapid movement reduce immediately, guarantee again that at last the shop front can shut, and make the shop front be in closed condition always, reach noiseless and close the door and overcome tradition and produce the very big sound at closing time; Avoid the sharp impacts of the shop front and doorframe, slowed down the damage of the shop front and doorframe; This apparatus structure is simple, easy for installation, the charge is small, can be widely used in the occasions such as door and window of various classrooms, office, conference room and family.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model integral installation schematic diagram.

Fig. 2 installs vertical view for the utility model shop front.

Fig. 3 installs the bar magnet partial sectional view for the utility model shop front.

Fig. 4 installs coil and iron plate partial sectional view for the utility model doorframe.

Fig. 5 is the utility model operating principle schematic diagram.

Among the figure: 1 shop front, 2 doorframes, 3 closing coils, 4 iron plates, 5 bar magnets, 6 shop fronts are installed baffle plate.

The specific embodiment

Referring to Fig. 1, the shop front 1 is close to doorframe 2 with certain speed under external force, and is when the bar magnet on the shop front 15 during very near closing coil 3, can approximately equivalent coaxial in bar magnet 5 and closing coil 3.According to Lenz's law as can be known closing coil 3 can produce with bar magnet 5 rightabout magnetic induction lines and advance to hinder bar magnet 5, and such relation is arranged: bar magnet 5 movement velocitys are fast more, magnetic flux change by closing coil 3 is just fast more, the opposite direction magnetic line of force that closing coil 3 produces is also many more, and the reaction force of generation is also just big more.The movement velocity that is the shop front 1 is big more, and the power that the obstruction shop front 1 is advanced is also big more.

After bar magnet 5 entered closing coil 3 fully, this moment, the movement velocity of the shop front 1 was reduced.The rate of change of the magnetic flux by closing coil 3 is also almost nil, and reaction force also is reduced to zero thereupon thus.At this moment the shop front 1 relies on the bar magnet 5 and the power that attracts each other of the iron plate 4 of closing coil 3 bottoms lightly the shop front 1 to be shut again.The shop front 1 is just kept closed condition under bar magnet 5 and iron plate 4 adelphotaxyes.When the shop front 1 under certain external force effect (pushing), as long as this power just can be opened door greater than the magnetic force between bar magnet 5 and the iron plate 4 such as someone outdoors.

Claims

1. a magnetic strength automatic slow-down device mainly is made up of bar magnet, induction closing coil, iron plate, and it is characterized in that: bar magnet is installed on the shop front and the doorframe contact surface edge perpendicular to the shop front; The induction closing coil is embedded on the contact surface of the doorframe and the shop front, the length of induction closing coil and the equal in length of shop front external magnet rod; Round iron plate is installed in the bottom of closing coil, and its diameter equals the size of closing coil.

2. magnetic strength automatic slow-down device according to claim 1 is characterized in that: the bar magnet specification is that diameter is 1cm, the length 1.5cm outside the shop front, and distance is 2cm between per two bar magnets; The closing coil material adopts copper wire, and its length is 1.5cm; The iron plate diameter is 1cm, and thickness is 3mm.