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密码锁的工作原理

How does a Combination Lock work?

In this video, we’re gonna use 3D animation
我们会在本视频中使用三维动画
to show the inside of a combination lock.
来展示密码锁的内部结构
I’m gonna go over exactly why putting in a three-digit combination allows us to open the lock.
我将详细说明为什么能用一个三位数的密码打开锁
Let’s check it out.
一探究竟吧
This video is sponsored by CG Boost.
本视频由CG Boost赞助
Stay tuned at the end of this video
不要走开 在视频结尾
to discover how you can create your own 3D animations
你将知道怎么用Blender这款免费程序
using a free program called Blender.
制作属于你的3D动画
During most of my teen years,
在我青年时期的大多时候
I used a combination lock at school to open up my locker.
学校储物柜用的是这种密码锁
Before making this video,
在制作视频之前
I really didn’t understand how it worked.
我并不知道密码锁的原理
So I did some research, looked at a few patents,
所以我做了些调查 查了一些专利
and then opened one up to see what’s on the inside.
并且拆开了一个密码锁来看它里面有什么
Let me show you what I learned.
让我介绍一下我学到了什么吧
Here’s the case that holds all of our parts.
这是承装所有零部件的锁身
This metal curved bar is called the shackle.
这条折弯的金属棒叫做锁梁
It won’t come out until the right combination is put in.
只有输入正确的密码 才能拔出锁梁
Then, it pops right open.
密码正确 锁梁就弹开
This piece is called the lever.
这个叫锁闩
It slides right onto the bar here.
它安在这条棒上
The lever can rotate counterclockwise.
锁闩可以逆时针旋转
This piece of metal wants to flex outward.
这个弹片会向外弯曲
Once it’s bent inside of here,
当弹片置于锁身内后
the tension makes the latch want to spring back to its original position.
弯曲产生的弹力会使锁闩弹回起初的位置
Normally, the latch would just keep going,
通常 锁闩不会一直回弹
but the rotation will be stopped by this tiny bump.
因为会被这个小凸点挡住
The lever also has a tiny latch here
锁闩上有个很小的锁舌
that is spring loaded from the inside.
锁舌被里面的弹簧顶住
The shackle comes down, pushes the latch in,
锁梁下压 会把锁舌推进去
and then the latch fits right into the groove,
然后锁舌就会卡进锁梁的槽里
and we are locked.
这样就锁上了
When the shackle is pulled out,
往外拉锁梁的时候
the latch is forced to rotate
锁闩会受力转动
to allow the shackle to come all the way out.
从而使锁舌从槽里脱出
Then, the lever springs back into place.
之后 锁闩就会弹回原位
Let’s watch that again.
再看一遍
The shackle can’t come all the way out,
锁梁不会完全脱出
because of the shackle collar.
因为有锁领限制
It guides the shackle as it slides along here.
锁梁滑动时由锁领引导
But it stops us once we hit the very top.
但当到达最高点时 锁领就会限制锁梁运动
Okay, the reason that the locking mechanism works
好了 密码锁能够锁住的原理就是
is that, if the latch can’t rotate,
如果锁闩不能转动
then the shackle won’t come out.
那么锁梁也就不能出来
This is where the three cams come into play.
接下来加入三个凸轮进行演示
Let me show you.
看好
The back place has a bar sticking out.
后挡板上有个伸出的棒
It holds the three cams, washers in between,
三个凸轮装在棒上 由垫片隔开
and a spring at the end.
并且末端有装弹簧
The spring ensures that the three cams
这个弹簧会使三个凸轮
and the washers are all pressed together.
和垫片紧贴在一起
Cam two and three can spin freely.
2号和3号凸轮可以自由转动
But cam number one is actually attached to the dial.
但1号凸轮是和拨盘相连的
So when the dial spins, this cam spins too.
因此拨盘旋转的时候 1号凸轮也会旋转
This is what it looks like all put together.
这是把所有零件装起来的样子
Each cam has an indentation in them.
每个凸轮上都有一个凹口
The lock will open when all three of them are lined up.
当三个凹口都对齐时 锁就会打开
You can see how the lever can now rotate,
你会看到 锁闩现在可以转动
which allows the shackle to open.
锁闩转动就能让锁梁开启了
When these three indentations are not lined up,
当这三个凹口没有对齐时
the lever can’t rotate,
锁闩就不能转动
which means the shackle can’t come out.
也就意味着锁梁出不来
So how do we line up the cams by only turning this dial?
那么怎么只转动拨盘就使三个凸轮对齐呢?
Let’s look a little closer.
再仔细看看吧
Each cam has at least one of these teeth sticking off of it.
每个凸轮都至少有一个像这样突出的轮齿
You can see them better from this point of view.
从这个角度 你会看得更清楚
If we turn cam one far enough,
如果我们一直转动1号凸轮
the tooth on cam one will contact the tooth on cam two.
1号凸轮的轮齿就会碰到2号凸轮的轮齿
And then if we keep turning, all three cams move together.
如果我们继续转 三个凸轮就会一起转动
In fact, this is the first step to opening up the lock.
其实 这是开锁的第一步
Let’s walk through this process on the inside.
我们看看里面发生了什么
This time we’re looking at it from the front,
这次 我们从前面观察
so all three cams will need to line up here.
三个凸轮需要在这个位置使凹口对齐
We turn the dial clockwise three times to clear it.
我们先顺时针转动拨盘三圈错开正确位置
All three cam teeth are in contact with each other
现在三个凸轮的轮齿都相互接触了
and move as one.
三个凸轮会一起转动
Now let’s keep turning the dial
继续转动拨盘
until we hit the first number in the combination,
直到拨动到密码的第一个数字
which in this case is 21.
在这个例子下是21
Notice how cam three is now lined up
注意现在3号凸轮的凹口
right where it should be.
刚好在它应该对齐的位置
Now let’s work on the second number in the combination.
现在着手密码的第二个数字
This time we turn counterclockwise one full rotation.
这次逆时针旋转一整圈
Watch as the teeth from cam one
注意1号凸轮的轮齿
come in contact with came two on the other side.
它在另一侧和2号凸轮的轮齿接触了
Notice how this doesn’t touch cam three,
注意这个动作中没有碰到3号凸轮
which is still right where it should be.
3号凸轮还在它应在的位置
Now we keep spinning the dial
现在继续转动拨盘
until we hit the second number, which is 34.
直到我们拨动到第二个数字 在这是34
Now cam two and cam three are lined up.
现在2号凸轮和3号凸轮对齐了
For the last number in the combination,
至于密码的最后一个数字
just rotate the dial clockwise
只要顺时针旋转拨盘
until it lines up with the third number.
使指针和第三个数字对齐
And there we go.
那就成功了
All three cams are lined up, the lever rotates,
三个凸轮都在指定位置对齐了 锁闩转动
allowing the shackle to come out.
这样锁梁就能出来了
As the shackle is pushed back in,
当把锁梁按回去时
it comes down with a bit of a jolt,
会产生一个微小的震动
which is usually enough to nudge the cams out of alignment.
震动会触动凸轮 使它们不再对齐
This means the lock won’t open a second time for free;
这样密码锁就不能被直接重新打开
you’ll need to use the correct combination once again.
你需要再次使用密码才能打开
The animation that you’ve just seen is created with a program called Blender.
你刚才看到的动画是用Blender制作的
I use Blender to create all of the animations on my YouTube channel.
我YouTube上的动画都是用这程序做的
And yes, the program is completely free.
并且 这个程序是完全免费的
You can even download it right now if you want to.
如果你感兴趣 可以立刻下载它
However, it takes some dedication to learn,
但是 你需要专门学习怎么使用它
and you’ll need a good teacher.
并且你需要一个良师
Let me introduce you to my friend Zach from CG Boost.
让我介绍一下我的朋友 来自CG Boost的Zach
I’ve been following his channel for years now
多年来我一直在关注他的频道
because he does amazing work,
因为他的作品很赞
and I’ve learned a lot from him.
并且我从他那收获良多
Recently he’s released a new course
最近他发布了一套新课程
called Blender 2.8 Launch Pad.
叫Blender 2.8 Launch Pad
Check it out at CGBoost.com/JaredOwen.
可以在CGBoost.com/JaredOwen上查看
The course takes you from the very beginning;
这套课程带领你从零起步
you don’t need any prior knowledge.
所以你不需要任何预备知识
You’ll learn the fundamentals of Blender’s tools and interface,
你会学到Blender的工具和界面的基础知识
which you’ll then use to create this car animation.
你可以使用这些基础知识制作汽车动画
After completing the course,
当学完这套课程后
you’ll be able to create almost anything you can imagine in Blender.
你就能够用Blender做出任何能想到的东西
I have personally watched the entire course,
我看完了整套课程
and I can highly recommend it to anyone wanting to learn 3D animation.
如果你想学习三维动画 我非常推荐这套课程
Remember that Blender is free.
Blender是免费的
And this course by CG Boost is only $59.
而CG Boost的这一课程仅售$59
Plus the first 100 people to use my link will get 20% off.
此外用我的链接购买的前100名会打折20%
Just go to CGBoost.com/JaredOwen.
快来CGBoost.com/JaredOwen吧

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视频概述

密码锁的结构和原理

听录译者

收集自网络

翻译译者

小柴胡

审核员

审核员BY

视频来源

https://www.youtube.com/watch?v=sftkP4CjjZs

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